diff options
Diffstat (limited to 'drivers')
159 files changed, 44494 insertions, 11023 deletions
diff --git a/drivers/webp/SCsub b/drivers/webp/SCsub index 5596edbe09..f65bd13dba 100644 --- a/drivers/webp/SCsub +++ b/drivers/webp/SCsub @@ -1,63 +1,115 @@ Import('env') - webp_sources = [ - "webp/mux/muxedit.c", - "webp/mux/muxread.c", - "webp/mux/muxinternal.c", - "webp/mux/demux.c", - "webp/enc/tree.c", - "webp/enc/analysis.c", - "webp/enc/backward_references.c", - "webp/enc/alpha.c", - "webp/enc/picture.c", - "webp/enc/frame.c", - "webp/enc/webpenc.c", - "webp/enc/cost.c", - "webp/enc/filter.c", - "webp/enc/vp8l.c", - "webp/enc/quant.c", - "webp/enc/histogram.c", - "webp/enc/syntax.c", - "webp/enc/config.c", - "webp/enc/layer.c", - "webp/enc/iterator.c", - "webp/dsp/dec_sse2.c", - "webp/dsp/upsampling_sse2.c", - "webp/dsp/dec_neon.c", - "webp/dsp/enc.c", - "webp/dsp/enc_sse2.c", - "webp/dsp/upsampling.c", - "webp/dsp/lossless.c", - "webp/dsp/cpu.c", - "webp/dsp/dec.c", - "webp/dsp/yuv.c", - "webp/utils/bit_reader.c", - "webp/utils/filters.c", - "webp/utils/bit_writer.c", - "webp/utils/thread.c", - "webp/utils/quant_levels.c", - "webp/utils/color_cache.c", - "webp/utils/rescaler.c", - "webp/utils/utils.c", - "webp/utils/huffman.c", - "webp/utils/huffman_encode.c", - "webp/dec/tree.c", - "webp/dec/alpha.c", - "webp/dec/frame.c", - "webp/dec/vp8l.c", - "webp/dec/vp8.c", - "webp/dec/quant.c", - "webp/dec/webp.c", - "webp/dec/buffer.c", - "webp/dec/io.c", - "webp/dec/layer.c", - "webp/dec/idec.c", - "webp/image_loader_webp.cpp" +"webp/enc/webpenc.c",\ +"webp/enc/near_lossless.c",\ +"webp/enc/frame.c",\ +"webp/enc/alpha.c",\ +"webp/enc/picture_csp.c",\ +"webp/enc/vp8l.c",\ +"webp/enc/picture_psnr.c",\ +"webp/enc/delta_palettization.c",\ +"webp/enc/syntax.c",\ +"webp/enc/backward_references.c",\ +"webp/enc/token.c",\ +"webp/enc/analysis.c",\ +"webp/enc/iterator.c",\ +"webp/enc/picture_tools.c",\ +"webp/enc/picture_rescale.c",\ +"webp/enc/config.c",\ +"webp/enc/tree.c",\ +"webp/enc/cost.c",\ +"webp/enc/picture.c",\ +"webp/enc/quant.c",\ +"webp/enc/filter.c",\ +"webp/enc/histogram.c",\ +"webp/image_loader_webp.cpp",\ +"webp/utils/rescaler.c",\ +"webp/utils/filters.c",\ +"webp/utils/quant_levels_dec.c",\ +"webp/utils/huffman.c",\ +"webp/utils/thread.c",\ +"webp/utils/quant_levels.c",\ +"webp/utils/bit_writer.c",\ +"webp/utils/bit_reader.c",\ +"webp/utils/random.c",\ +"webp/utils/utils.c",\ +"webp/utils/huffman_encode.c",\ +"webp/utils/color_cache.c",\ +"webp/mux/muxinternal.c",\ +"webp/mux/muxread.c",\ +"webp/mux/anim_encode.c",\ +"webp/mux/muxedit.c",\ +"webp/dec/webp.c",\ +"webp/dec/frame.c",\ +"webp/dec/alpha.c",\ +"webp/dec/vp8l.c",\ +"webp/dec/io.c",\ +"webp/dec/vp8.c",\ +"webp/dec/idec.c",\ +"webp/dec/tree.c",\ +"webp/dec/buffer.c",\ +"webp/dec/quant.c",\ +"webp/demux/demux.c",\ +"webp/demux/anim_decode.c",\ +"webp/dsp/yuv.c",\ +"webp/dsp/filters_sse2.c",\ +"webp/dsp/dec_sse41.c",\ +"webp/dsp/rescaler.c",\ +"webp/dsp/lossless_sse2.c",\ +"webp/dsp/alpha_processing_sse41.c",\ +"webp/dsp/alpha_processing_sse2.c",\ +"webp/dsp/filters.c",\ +"webp/dsp/upsampling_mips_dsp_r2.c",\ +"webp/dsp/dec_neon.c",\ +"webp/dsp/enc_neon.c",\ +"webp/dsp/lossless_enc_mips32.c",\ +"webp/dsp/lossless_enc_sse2.c",\ +"webp/dsp/upsampling.c",\ +"webp/dsp/lossless_enc_neon.c",\ +"webp/dsp/alpha_processing.c",\ +"webp/dsp/cost_sse2.c",\ +"webp/dsp/dec_mips32.c",\ +"webp/dsp/enc_avx2.c",\ +"webp/dsp/rescaler_mips32.c",\ +"webp/dsp/enc.c",\ +"webp/dsp/lossless_enc_sse41.c",\ +"webp/dsp/cost_mips32.c",\ +"webp/dsp/lossless_mips_dsp_r2.c",\ +"webp/dsp/filters_mips_dsp_r2.c",\ +"webp/dsp/upsampling_neon.c",\ +"webp/dsp/alpha_processing_mips_dsp_r2.c",\ +"webp/dsp/enc_mips_dsp_r2.c",\ +"webp/dsp/lossless.c",\ +"webp/dsp/yuv_mips_dsp_r2.c",\ +"webp/dsp/cost_mips_dsp_r2.c",\ +"webp/dsp/argb.c",\ +"webp/dsp/dec_sse2.c",\ +"webp/dsp/rescaler_sse2.c",\ +"webp/dsp/enc_sse41.c",\ +"webp/dsp/argb_mips_dsp_r2.c",\ +"webp/dsp/lossless_enc_mips_dsp_r2.c",\ +"webp/dsp/dec_clip_tables.c",\ +"webp/dsp/yuv_mips32.c",\ +"webp/dsp/cpu.c",\ +"webp/dsp/dec.c",\ +"webp/dsp/argb_sse2.c",\ +"webp/dsp/lossless_neon.c",\ +"webp/dsp/lossless_enc.c",\ +"webp/dsp/enc_mips32.c",\ +"webp/dsp/cost.c",\ +"webp/dsp/rescaler_mips_dsp_r2.c",\ +"webp/dsp/dec_mips_dsp_r2.c",\ +"webp/dsp/rescaler_neon.c",\ +"webp/dsp/yuv_sse2.c",\ +"webp/dsp/enc_sse2.c",\ +"webp/dsp/upsampling_sse2.c" ] env.drivers_sources+=webp_sources #env.add_source_files(env.drivers_sources, webp_sources) + Export('env') + diff --git a/drivers/webp/dec/alpha.c b/drivers/webp/dec/alpha.c index d1095fa555..52216fc4d6 100644 --- a/drivers/webp/dec/alpha.c +++ b/drivers/webp/dec/alpha.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Alpha-plane decompression. @@ -10,131 +12,156 @@ // Author: Skal (pascal.massimino@gmail.com) #include <stdlib.h> +#include "./alphai.h" #include "./vp8i.h" #include "./vp8li.h" -#include "../utils/filters.h" -#include "../utils/quant_levels.h" -#include "../format_constants.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -// TODO(skal): move to dsp/ ? -static void CopyPlane(const uint8_t* src, int src_stride, - uint8_t* dst, int dst_stride, int width, int height) { - while (height-- > 0) { - memcpy(dst, src, width); - src += src_stride; - dst += dst_stride; +#include "../dsp/dsp.h" +#include "../utils/quant_levels_dec.h" +#include "../utils/utils.h" +#include "../webp/format_constants.h" + +//------------------------------------------------------------------------------ +// ALPHDecoder object. + +ALPHDecoder* ALPHNew(void) { + ALPHDecoder* const dec = (ALPHDecoder*)WebPSafeCalloc(1ULL, sizeof(*dec)); + return dec; +} + +void ALPHDelete(ALPHDecoder* const dec) { + if (dec != NULL) { + VP8LDelete(dec->vp8l_dec_); + dec->vp8l_dec_ = NULL; + WebPSafeFree(dec); } } //------------------------------------------------------------------------------ -// Decodes the compressed data 'data' of size 'data_size' into the 'output'. -// The 'output' buffer should be pre-allocated and must be of the same -// dimension 'height'x'stride', as that of the image. -// -// Returns 1 on successfully decoding the compressed alpha and -// 0 if either: -// error in bit-stream header (invalid compression mode or filter), or -// error returned by appropriate compression method. - -static int DecodeAlpha(const uint8_t* data, size_t data_size, - int width, int height, int stride, uint8_t* output) { - uint8_t* decoded_data = NULL; - const size_t decoded_size = height * width; - uint8_t* unfiltered_data = NULL; - WEBP_FILTER_TYPE filter; - int pre_processing; - int rsrv; +// Decoding. + +// Initialize alpha decoding by parsing the alpha header and decoding the image +// header for alpha data stored using lossless compression. +// Returns false in case of error in alpha header (data too short, invalid +// compression method or filter, error in lossless header data etc). +static int ALPHInit(ALPHDecoder* const dec, const uint8_t* data, + size_t data_size, int width, int height, uint8_t* output) { int ok = 0; - int method; + const uint8_t* const alpha_data = data + ALPHA_HEADER_LEN; + const size_t alpha_data_size = data_size - ALPHA_HEADER_LEN; + int rsrv; - assert(width > 0 && height > 0 && stride >= width); + assert(width > 0 && height > 0); assert(data != NULL && output != NULL); + dec->width_ = width; + dec->height_ = height; + if (data_size <= ALPHA_HEADER_LEN) { return 0; } - method = (data[0] >> 0) & 0x03; - filter = (data[0] >> 2) & 0x03; - pre_processing = (data[0] >> 4) & 0x03; + dec->method_ = (data[0] >> 0) & 0x03; + dec->filter_ = (data[0] >> 2) & 0x03; + dec->pre_processing_ = (data[0] >> 4) & 0x03; rsrv = (data[0] >> 6) & 0x03; - if (method < ALPHA_NO_COMPRESSION || - method > ALPHA_LOSSLESS_COMPRESSION || - filter >= WEBP_FILTER_LAST || - pre_processing > ALPHA_PREPROCESSED_LEVELS || + if (dec->method_ < ALPHA_NO_COMPRESSION || + dec->method_ > ALPHA_LOSSLESS_COMPRESSION || + dec->filter_ >= WEBP_FILTER_LAST || + dec->pre_processing_ > ALPHA_PREPROCESSED_LEVELS || rsrv != 0) { return 0; } - if (method == ALPHA_NO_COMPRESSION) { - ok = (data_size >= decoded_size); - decoded_data = (uint8_t*)data + ALPHA_HEADER_LEN; + if (dec->method_ == ALPHA_NO_COMPRESSION) { + const size_t alpha_decoded_size = dec->width_ * dec->height_; + ok = (alpha_data_size >= alpha_decoded_size); } else { - decoded_data = (uint8_t*)malloc(decoded_size); - if (decoded_data == NULL) return 0; - ok = VP8LDecodeAlphaImageStream(width, height, - data + ALPHA_HEADER_LEN, - data_size - ALPHA_HEADER_LEN, - decoded_data); + assert(dec->method_ == ALPHA_LOSSLESS_COMPRESSION); + ok = VP8LDecodeAlphaHeader(dec, alpha_data, alpha_data_size, output); } + VP8FiltersInit(); + return ok; +} - if (ok) { - WebPFilterFunc unfilter_func = WebPUnfilters[filter]; - if (unfilter_func != NULL) { - unfiltered_data = (uint8_t*)malloc(decoded_size); - if (unfiltered_data == NULL) { - ok = 0; - goto Error; - } - // TODO(vikas): Implement on-the-fly decoding & filter mechanism to decode - // and apply filter per image-row. - unfilter_func(decoded_data, width, height, 1, width, unfiltered_data); - // Construct raw_data (height x stride) from alpha data (height x width). - CopyPlane(unfiltered_data, width, output, stride, width, height); - free(unfiltered_data); - } else { - // Construct raw_data (height x stride) from alpha data (height x width). - CopyPlane(decoded_data, width, output, stride, width, height); - } - if (pre_processing == ALPHA_PREPROCESSED_LEVELS) { - ok = DequantizeLevels(decoded_data, width, height); +// Decodes, unfilters and dequantizes *at least* 'num_rows' rows of alpha +// starting from row number 'row'. It assumes that rows up to (row - 1) have +// already been decoded. +// Returns false in case of bitstream error. +static int ALPHDecode(VP8Decoder* const dec, int row, int num_rows) { + ALPHDecoder* const alph_dec = dec->alph_dec_; + const int width = alph_dec->width_; + const int height = alph_dec->height_; + WebPUnfilterFunc unfilter_func = WebPUnfilters[alph_dec->filter_]; + uint8_t* const output = dec->alpha_plane_; + if (alph_dec->method_ == ALPHA_NO_COMPRESSION) { + const size_t offset = row * width; + const size_t num_pixels = num_rows * width; + assert(dec->alpha_data_size_ >= ALPHA_HEADER_LEN + offset + num_pixels); + memcpy(dec->alpha_plane_ + offset, + dec->alpha_data_ + ALPHA_HEADER_LEN + offset, num_pixels); + } else { // alph_dec->method_ == ALPHA_LOSSLESS_COMPRESSION + assert(alph_dec->vp8l_dec_ != NULL); + if (!VP8LDecodeAlphaImageStream(alph_dec, row + num_rows)) { + return 0; } } - Error: - if (method != ALPHA_NO_COMPRESSION) { - free(decoded_data); + if (unfilter_func != NULL) { + unfilter_func(width, height, width, row, num_rows, output); } - return ok; + + if (row + num_rows == dec->pic_hdr_.height_) { + dec->is_alpha_decoded_ = 1; + } + return 1; } //------------------------------------------------------------------------------ +// Main entry point. const uint8_t* VP8DecompressAlphaRows(VP8Decoder* const dec, int row, int num_rows) { - const int stride = dec->pic_hdr_.width_; + const int width = dec->pic_hdr_.width_; + const int height = dec->pic_hdr_.height_; - if (row < 0 || num_rows < 0 || row + num_rows > dec->pic_hdr_.height_) { + if (row < 0 || num_rows <= 0 || row + num_rows > height) { return NULL; // sanity check. } if (row == 0) { - // Decode everything during the first call. - if (!DecodeAlpha(dec->alpha_data_, (size_t)dec->alpha_data_size_, - dec->pic_hdr_.width_, dec->pic_hdr_.height_, stride, - dec->alpha_plane_)) { - return NULL; // Error. + // Initialize decoding. + assert(dec->alpha_plane_ != NULL); + dec->alph_dec_ = ALPHNew(); + if (dec->alph_dec_ == NULL) return NULL; + if (!ALPHInit(dec->alph_dec_, dec->alpha_data_, dec->alpha_data_size_, + width, height, dec->alpha_plane_)) { + ALPHDelete(dec->alph_dec_); + dec->alph_dec_ = NULL; + return NULL; + } + // if we allowed use of alpha dithering, check whether it's needed at all + if (dec->alph_dec_->pre_processing_ != ALPHA_PREPROCESSED_LEVELS) { + dec->alpha_dithering_ = 0; // disable dithering + } else { + num_rows = height; // decode everything in one pass } } + if (!dec->is_alpha_decoded_) { + int ok = 0; + assert(dec->alph_dec_ != NULL); + ok = ALPHDecode(dec, row, num_rows); + if (ok && dec->alpha_dithering_ > 0) { + ok = WebPDequantizeLevels(dec->alpha_plane_, width, height, + dec->alpha_dithering_); + } + if (!ok || dec->is_alpha_decoded_) { + ALPHDelete(dec->alph_dec_); + dec->alph_dec_ = NULL; + } + if (!ok) return NULL; // Error. + } + // Return a pointer to the current decoded row. - return dec->alpha_plane_ + row * stride; + return dec->alpha_plane_ + row * width; } - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/buffer.c b/drivers/webp/dec/buffer.c index c159f6f248..9ed2b3fe1a 100644 --- a/drivers/webp/dec/buffer.c +++ b/drivers/webp/dec/buffer.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Everything about WebPDecBuffer @@ -15,10 +17,6 @@ #include "./webpi.h" #include "../utils/utils.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // WebPDecBuffer @@ -35,6 +33,11 @@ static int IsValidColorspace(int webp_csp_mode) { return (webp_csp_mode >= MODE_RGB && webp_csp_mode < MODE_LAST); } +// strictly speaking, the very last (or first, if flipped) row +// doesn't require padding. +#define MIN_BUFFER_SIZE(WIDTH, HEIGHT, STRIDE) \ + (uint64_t)(STRIDE) * ((HEIGHT) - 1) + (WIDTH) + static VP8StatusCode CheckDecBuffer(const WebPDecBuffer* const buffer) { int ok = 1; const WEBP_CSP_MODE mode = buffer->colorspace; @@ -44,33 +47,41 @@ static VP8StatusCode CheckDecBuffer(const WebPDecBuffer* const buffer) { ok = 0; } else if (!WebPIsRGBMode(mode)) { // YUV checks const WebPYUVABuffer* const buf = &buffer->u.YUVA; - const uint64_t y_size = (uint64_t)buf->y_stride * height; - const uint64_t u_size = (uint64_t)buf->u_stride * ((height + 1) / 2); - const uint64_t v_size = (uint64_t)buf->v_stride * ((height + 1) / 2); - const uint64_t a_size = (uint64_t)buf->a_stride * height; + const int uv_width = (width + 1) / 2; + const int uv_height = (height + 1) / 2; + const int y_stride = abs(buf->y_stride); + const int u_stride = abs(buf->u_stride); + const int v_stride = abs(buf->v_stride); + const int a_stride = abs(buf->a_stride); + const uint64_t y_size = MIN_BUFFER_SIZE(width, height, y_stride); + const uint64_t u_size = MIN_BUFFER_SIZE(uv_width, uv_height, u_stride); + const uint64_t v_size = MIN_BUFFER_SIZE(uv_width, uv_height, v_stride); + const uint64_t a_size = MIN_BUFFER_SIZE(width, height, a_stride); ok &= (y_size <= buf->y_size); ok &= (u_size <= buf->u_size); ok &= (v_size <= buf->v_size); - ok &= (buf->y_stride >= width); - ok &= (buf->u_stride >= (width + 1) / 2); - ok &= (buf->v_stride >= (width + 1) / 2); + ok &= (y_stride >= width); + ok &= (u_stride >= uv_width); + ok &= (v_stride >= uv_width); ok &= (buf->y != NULL); ok &= (buf->u != NULL); ok &= (buf->v != NULL); if (mode == MODE_YUVA) { - ok &= (buf->a_stride >= width); + ok &= (a_stride >= width); ok &= (a_size <= buf->a_size); ok &= (buf->a != NULL); } } else { // RGB checks const WebPRGBABuffer* const buf = &buffer->u.RGBA; - const uint64_t size = (uint64_t)buf->stride * height; + const int stride = abs(buf->stride); + const uint64_t size = MIN_BUFFER_SIZE(width, height, stride); ok &= (size <= buf->size); - ok &= (buf->stride >= width * kModeBpp[mode]); + ok &= (stride >= width * kModeBpp[mode]); ok &= (buf->rgba != NULL); } return ok ? VP8_STATUS_OK : VP8_STATUS_INVALID_PARAM; } +#undef MIN_BUFFER_SIZE static VP8StatusCode AllocateBuffer(WebPDecBuffer* const buffer) { const int w = buffer->width; @@ -133,9 +144,35 @@ static VP8StatusCode AllocateBuffer(WebPDecBuffer* const buffer) { return CheckDecBuffer(buffer); } +VP8StatusCode WebPFlipBuffer(WebPDecBuffer* const buffer) { + if (buffer == NULL) { + return VP8_STATUS_INVALID_PARAM; + } + if (WebPIsRGBMode(buffer->colorspace)) { + WebPRGBABuffer* const buf = &buffer->u.RGBA; + buf->rgba += (buffer->height - 1) * buf->stride; + buf->stride = -buf->stride; + } else { + WebPYUVABuffer* const buf = &buffer->u.YUVA; + const int H = buffer->height; + buf->y += (H - 1) * buf->y_stride; + buf->y_stride = -buf->y_stride; + buf->u += ((H - 1) >> 1) * buf->u_stride; + buf->u_stride = -buf->u_stride; + buf->v += ((H - 1) >> 1) * buf->v_stride; + buf->v_stride = -buf->v_stride; + if (buf->a != NULL) { + buf->a += (H - 1) * buf->a_stride; + buf->a_stride = -buf->a_stride; + } + } + return VP8_STATUS_OK; +} + VP8StatusCode WebPAllocateDecBuffer(int w, int h, const WebPDecoderOptions* const options, WebPDecBuffer* const out) { + VP8StatusCode status; if (out == NULL || w <= 0 || h <= 0) { return VP8_STATUS_INVALID_PARAM; } @@ -152,18 +189,28 @@ VP8StatusCode WebPAllocateDecBuffer(int w, int h, h = ch; } if (options->use_scaling) { - if (options->scaled_width <= 0 || options->scaled_height <= 0) { + int scaled_width = options->scaled_width; + int scaled_height = options->scaled_height; + if (!WebPRescalerGetScaledDimensions( + w, h, &scaled_width, &scaled_height)) { return VP8_STATUS_INVALID_PARAM; } - w = options->scaled_width; - h = options->scaled_height; + w = scaled_width; + h = scaled_height; } } out->width = w; out->height = h; - // Then, allocate buffer for real - return AllocateBuffer(out); + // Then, allocate buffer for real. + status = AllocateBuffer(out); + if (status != VP8_STATUS_OK) return status; + + // Use the stride trick if vertical flip is needed. + if (options != NULL && options->flip) { + status = WebPFlipBuffer(out); + } + return status; } //------------------------------------------------------------------------------ @@ -180,8 +227,9 @@ int WebPInitDecBufferInternal(WebPDecBuffer* buffer, int version) { void WebPFreeDecBuffer(WebPDecBuffer* buffer) { if (buffer != NULL) { - if (!buffer->is_external_memory) - free(buffer->private_memory); + if (!buffer->is_external_memory) { + WebPSafeFree(buffer->private_memory); + } buffer->private_memory = NULL; } } @@ -210,6 +258,3 @@ void WebPGrabDecBuffer(WebPDecBuffer* const src, WebPDecBuffer* const dst) { //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/decode_vp8.h b/drivers/webp/dec/decode_vp8.h index c26a9fc891..b9337bbec0 100644 --- a/drivers/webp/dec/decode_vp8.h +++ b/drivers/webp/dec/decode_vp8.h @@ -1,8 +1,10 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Low-level API for VP8 decoder @@ -12,9 +14,9 @@ #ifndef WEBP_WEBP_DECODE_VP8_H_ #define WEBP_WEBP_DECODE_VP8_H_ -#include "../decode.h" +#include "../webp/decode.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -130,7 +132,8 @@ static WEBP_INLINE int VP8InitIo(VP8Io* const io) { return VP8InitIoInternal(io, WEBP_DECODER_ABI_VERSION); } -// Start decoding a new picture. Returns true if ok. +// Decode the VP8 frame header. Returns true if ok. +// Note: 'io->data' must be pointing to the start of the VP8 frame header. int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io); // Decode a picture. Will call VP8GetHeaders() if it wasn't done already. @@ -175,7 +178,7 @@ WEBP_EXTERN(int) VP8LGetInfo( const uint8_t* data, size_t data_size, // data available so far int* const width, int* const height, int* const has_alpha); -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/dec/frame.c b/drivers/webp/dec/frame.c index 9c91a48e17..b882133eab 100644 --- a/drivers/webp/dec/frame.c +++ b/drivers/webp/dec/frame.c @@ -1,8 +1,10 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Frame-reconstruction function. Memory allocation. @@ -13,11 +15,180 @@ #include "./vp8i.h" #include "../utils/utils.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +//------------------------------------------------------------------------------ +// Main reconstruction function. + +static const int kScan[16] = { + 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS, + 0 + 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS, + 0 + 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS, + 0 + 12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS +}; + +static int CheckMode(int mb_x, int mb_y, int mode) { + if (mode == B_DC_PRED) { + if (mb_x == 0) { + return (mb_y == 0) ? B_DC_PRED_NOTOPLEFT : B_DC_PRED_NOLEFT; + } else { + return (mb_y == 0) ? B_DC_PRED_NOTOP : B_DC_PRED; + } + } + return mode; +} -#define ALIGN_MASK (32 - 1) +static void Copy32b(uint8_t* const dst, const uint8_t* const src) { + memcpy(dst, src, 4); +} + +static WEBP_INLINE void DoTransform(uint32_t bits, const int16_t* const src, + uint8_t* const dst) { + switch (bits >> 30) { + case 3: + VP8Transform(src, dst, 0); + break; + case 2: + VP8TransformAC3(src, dst); + break; + case 1: + VP8TransformDC(src, dst); + break; + default: + break; + } +} + +static void DoUVTransform(uint32_t bits, const int16_t* const src, + uint8_t* const dst) { + if (bits & 0xff) { // any non-zero coeff at all? + if (bits & 0xaa) { // any non-zero AC coefficient? + VP8TransformUV(src, dst); // note we don't use the AC3 variant for U/V + } else { + VP8TransformDCUV(src, dst); + } + } +} + +static void ReconstructRow(const VP8Decoder* const dec, + const VP8ThreadContext* ctx) { + int j; + int mb_x; + const int mb_y = ctx->mb_y_; + const int cache_id = ctx->id_; + uint8_t* const y_dst = dec->yuv_b_ + Y_OFF; + uint8_t* const u_dst = dec->yuv_b_ + U_OFF; + uint8_t* const v_dst = dec->yuv_b_ + V_OFF; + + // Initialize left-most block. + for (j = 0; j < 16; ++j) { + y_dst[j * BPS - 1] = 129; + } + for (j = 0; j < 8; ++j) { + u_dst[j * BPS - 1] = 129; + v_dst[j * BPS - 1] = 129; + } + + // Init top-left sample on left column too. + if (mb_y > 0) { + y_dst[-1 - BPS] = u_dst[-1 - BPS] = v_dst[-1 - BPS] = 129; + } else { + // we only need to do this init once at block (0,0). + // Afterward, it remains valid for the whole topmost row. + memset(y_dst - BPS - 1, 127, 16 + 4 + 1); + memset(u_dst - BPS - 1, 127, 8 + 1); + memset(v_dst - BPS - 1, 127, 8 + 1); + } + + // Reconstruct one row. + for (mb_x = 0; mb_x < dec->mb_w_; ++mb_x) { + const VP8MBData* const block = ctx->mb_data_ + mb_x; + + // Rotate in the left samples from previously decoded block. We move four + // pixels at a time for alignment reason, and because of in-loop filter. + if (mb_x > 0) { + for (j = -1; j < 16; ++j) { + Copy32b(&y_dst[j * BPS - 4], &y_dst[j * BPS + 12]); + } + for (j = -1; j < 8; ++j) { + Copy32b(&u_dst[j * BPS - 4], &u_dst[j * BPS + 4]); + Copy32b(&v_dst[j * BPS - 4], &v_dst[j * BPS + 4]); + } + } + { + // bring top samples into the cache + VP8TopSamples* const top_yuv = dec->yuv_t_ + mb_x; + const int16_t* const coeffs = block->coeffs_; + uint32_t bits = block->non_zero_y_; + int n; + + if (mb_y > 0) { + memcpy(y_dst - BPS, top_yuv[0].y, 16); + memcpy(u_dst - BPS, top_yuv[0].u, 8); + memcpy(v_dst - BPS, top_yuv[0].v, 8); + } + + // predict and add residuals + if (block->is_i4x4_) { // 4x4 + uint32_t* const top_right = (uint32_t*)(y_dst - BPS + 16); + + if (mb_y > 0) { + if (mb_x >= dec->mb_w_ - 1) { // on rightmost border + memset(top_right, top_yuv[0].y[15], sizeof(*top_right)); + } else { + memcpy(top_right, top_yuv[1].y, sizeof(*top_right)); + } + } + // replicate the top-right pixels below + top_right[BPS] = top_right[2 * BPS] = top_right[3 * BPS] = top_right[0]; + + // predict and add residuals for all 4x4 blocks in turn. + for (n = 0; n < 16; ++n, bits <<= 2) { + uint8_t* const dst = y_dst + kScan[n]; + VP8PredLuma4[block->imodes_[n]](dst); + DoTransform(bits, coeffs + n * 16, dst); + } + } else { // 16x16 + const int pred_func = CheckMode(mb_x, mb_y, block->imodes_[0]); + VP8PredLuma16[pred_func](y_dst); + if (bits != 0) { + for (n = 0; n < 16; ++n, bits <<= 2) { + DoTransform(bits, coeffs + n * 16, y_dst + kScan[n]); + } + } + } + { + // Chroma + const uint32_t bits_uv = block->non_zero_uv_; + const int pred_func = CheckMode(mb_x, mb_y, block->uvmode_); + VP8PredChroma8[pred_func](u_dst); + VP8PredChroma8[pred_func](v_dst); + DoUVTransform(bits_uv >> 0, coeffs + 16 * 16, u_dst); + DoUVTransform(bits_uv >> 8, coeffs + 20 * 16, v_dst); + } + + // stash away top samples for next block + if (mb_y < dec->mb_h_ - 1) { + memcpy(top_yuv[0].y, y_dst + 15 * BPS, 16); + memcpy(top_yuv[0].u, u_dst + 7 * BPS, 8); + memcpy(top_yuv[0].v, v_dst + 7 * BPS, 8); + } + } + // Transfer reconstructed samples from yuv_b_ cache to final destination. + { + const int y_offset = cache_id * 16 * dec->cache_y_stride_; + const int uv_offset = cache_id * 8 * dec->cache_uv_stride_; + uint8_t* const y_out = dec->cache_y_ + mb_x * 16 + y_offset; + uint8_t* const u_out = dec->cache_u_ + mb_x * 8 + uv_offset; + uint8_t* const v_out = dec->cache_v_ + mb_x * 8 + uv_offset; + for (j = 0; j < 16; ++j) { + memcpy(y_out + j * dec->cache_y_stride_, y_dst + j * BPS, 16); + } + for (j = 0; j < 8; ++j) { + memcpy(u_out + j * dec->cache_uv_stride_, u_dst + j * BPS, 8); + memcpy(v_out + j * dec->cache_uv_stride_, v_dst + j * BPS, 8); + } + } + } +} //------------------------------------------------------------------------------ // Filtering @@ -29,25 +200,18 @@ extern "C" { // U/V, so it's 8 samples total (because of the 2x upsampling). static const uint8_t kFilterExtraRows[3] = { 0, 2, 8 }; -static WEBP_INLINE int hev_thresh_from_level(int level, int keyframe) { - if (keyframe) { - return (level >= 40) ? 2 : (level >= 15) ? 1 : 0; - } else { - return (level >= 40) ? 3 : (level >= 20) ? 2 : (level >= 15) ? 1 : 0; - } -} - static void DoFilter(const VP8Decoder* const dec, int mb_x, int mb_y) { const VP8ThreadContext* const ctx = &dec->thread_ctx_; + const int cache_id = ctx->id_; const int y_bps = dec->cache_y_stride_; - VP8FInfo* const f_info = ctx->f_info_ + mb_x; - uint8_t* const y_dst = dec->cache_y_ + ctx->id_ * 16 * y_bps + mb_x * 16; - const int level = f_info->f_level_; + const VP8FInfo* const f_info = ctx->f_info_ + mb_x; + uint8_t* const y_dst = dec->cache_y_ + cache_id * 16 * y_bps + mb_x * 16; const int ilevel = f_info->f_ilevel_; - const int limit = 2 * level + ilevel; - if (level == 0) { + const int limit = f_info->f_limit_; + if (limit == 0) { return; } + assert(limit >= 3); if (dec->filter_type_ == 1) { // simple if (mb_x > 0) { VP8SimpleHFilter16(y_dst, y_bps, limit + 4); @@ -63,10 +227,9 @@ static void DoFilter(const VP8Decoder* const dec, int mb_x, int mb_y) { } } else { // complex const int uv_bps = dec->cache_uv_stride_; - uint8_t* const u_dst = dec->cache_u_ + ctx->id_ * 8 * uv_bps + mb_x * 8; - uint8_t* const v_dst = dec->cache_v_ + ctx->id_ * 8 * uv_bps + mb_x * 8; - const int hev_thresh = - hev_thresh_from_level(level, dec->frm_hdr_.key_frame_); + uint8_t* const u_dst = dec->cache_u_ + cache_id * 8 * uv_bps + mb_x * 8; + uint8_t* const v_dst = dec->cache_v_ + cache_id * 8 * uv_bps + mb_x * 8; + const int hev_thresh = f_info->hev_thresh_; if (mb_x > 0) { VP8HFilter16(y_dst, y_bps, limit + 4, ilevel, hev_thresh); VP8HFilter8(u_dst, v_dst, uv_bps, limit + 4, ilevel, hev_thresh); @@ -97,53 +260,138 @@ static void FilterRow(const VP8Decoder* const dec) { } //------------------------------------------------------------------------------ +// Precompute the filtering strength for each segment and each i4x4/i16x16 mode. -void VP8StoreBlock(VP8Decoder* const dec) { +static void PrecomputeFilterStrengths(VP8Decoder* const dec) { if (dec->filter_type_ > 0) { - VP8FInfo* const info = dec->f_info_ + dec->mb_x_; - const int skip = dec->mb_info_[dec->mb_x_].skip_; - int level = dec->filter_levels_[dec->segment_]; - if (dec->filter_hdr_.use_lf_delta_) { - // TODO(skal): only CURRENT is handled for now. - level += dec->filter_hdr_.ref_lf_delta_[0]; - if (dec->is_i4x4_) { - level += dec->filter_hdr_.mode_lf_delta_[0]; + int s; + const VP8FilterHeader* const hdr = &dec->filter_hdr_; + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + int i4x4; + // First, compute the initial level + int base_level; + if (dec->segment_hdr_.use_segment_) { + base_level = dec->segment_hdr_.filter_strength_[s]; + if (!dec->segment_hdr_.absolute_delta_) { + base_level += hdr->level_; + } + } else { + base_level = hdr->level_; + } + for (i4x4 = 0; i4x4 <= 1; ++i4x4) { + VP8FInfo* const info = &dec->fstrengths_[s][i4x4]; + int level = base_level; + if (hdr->use_lf_delta_) { + level += hdr->ref_lf_delta_[0]; + if (i4x4) { + level += hdr->mode_lf_delta_[0]; + } + } + level = (level < 0) ? 0 : (level > 63) ? 63 : level; + if (level > 0) { + int ilevel = level; + if (hdr->sharpness_ > 0) { + if (hdr->sharpness_ > 4) { + ilevel >>= 2; + } else { + ilevel >>= 1; + } + if (ilevel > 9 - hdr->sharpness_) { + ilevel = 9 - hdr->sharpness_; + } + } + if (ilevel < 1) ilevel = 1; + info->f_ilevel_ = ilevel; + info->f_limit_ = 2 * level + ilevel; + info->hev_thresh_ = (level >= 40) ? 2 : (level >= 15) ? 1 : 0; + } else { + info->f_limit_ = 0; // no filtering + } + info->f_inner_ = i4x4; } } - level = (level < 0) ? 0 : (level > 63) ? 63 : level; - info->f_level_ = level; + } +} - if (dec->filter_hdr_.sharpness_ > 0) { - if (dec->filter_hdr_.sharpness_ > 4) { - level >>= 2; - } else { - level >>= 1; +//------------------------------------------------------------------------------ +// Dithering + +#define DITHER_AMP_TAB_SIZE 12 +static const int kQuantToDitherAmp[DITHER_AMP_TAB_SIZE] = { + // roughly, it's dqm->uv_mat_[1] + 8, 7, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1 +}; + +void VP8InitDithering(const WebPDecoderOptions* const options, + VP8Decoder* const dec) { + assert(dec != NULL); + if (options != NULL) { + const int d = options->dithering_strength; + const int max_amp = (1 << VP8_RANDOM_DITHER_FIX) - 1; + const int f = (d < 0) ? 0 : (d > 100) ? max_amp : (d * max_amp / 100); + if (f > 0) { + int s; + int all_amp = 0; + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + VP8QuantMatrix* const dqm = &dec->dqm_[s]; + if (dqm->uv_quant_ < DITHER_AMP_TAB_SIZE) { + // TODO(skal): should we specially dither more for uv_quant_ < 0? + const int idx = (dqm->uv_quant_ < 0) ? 0 : dqm->uv_quant_; + dqm->dither_ = (f * kQuantToDitherAmp[idx]) >> 3; + } + all_amp |= dqm->dither_; } - if (level > 9 - dec->filter_hdr_.sharpness_) { - level = 9 - dec->filter_hdr_.sharpness_; + if (all_amp != 0) { + VP8InitRandom(&dec->dithering_rg_, 1.0f); + dec->dither_ = 1; } } + // potentially allow alpha dithering + dec->alpha_dithering_ = options->alpha_dithering_strength; + if (dec->alpha_dithering_ > 100) { + dec->alpha_dithering_ = 100; + } else if (dec->alpha_dithering_ < 0) { + dec->alpha_dithering_ = 0; + } + } +} - info->f_ilevel_ = (level < 1) ? 1 : level; - info->f_inner_ = (!skip || dec->is_i4x4_); +// minimal amp that will provide a non-zero dithering effect +#define MIN_DITHER_AMP 4 +#define DITHER_DESCALE 4 +#define DITHER_DESCALE_ROUNDER (1 << (DITHER_DESCALE - 1)) +#define DITHER_AMP_BITS 8 +#define DITHER_AMP_CENTER (1 << DITHER_AMP_BITS) + +static void Dither8x8(VP8Random* const rg, uint8_t* dst, int bps, int amp) { + int i, j; + for (j = 0; j < 8; ++j) { + for (i = 0; i < 8; ++i) { + // TODO: could be made faster with SSE2 + const int bits = + VP8RandomBits2(rg, DITHER_AMP_BITS + 1, amp) - DITHER_AMP_CENTER; + // Convert to range: [-2,2] for dither=50, [-4,4] for dither=100 + const int delta = (bits + DITHER_DESCALE_ROUNDER) >> DITHER_DESCALE; + const int v = (int)dst[i] + delta; + dst[i] = (v < 0) ? 0 : (v > 255) ? 255u : (uint8_t)v; + } + dst += bps; } - { - // Transfer samples to row cache - int y; - const int y_offset = dec->cache_id_ * 16 * dec->cache_y_stride_; - const int uv_offset = dec->cache_id_ * 8 * dec->cache_uv_stride_; - uint8_t* const ydst = dec->cache_y_ + dec->mb_x_ * 16 + y_offset; - uint8_t* const udst = dec->cache_u_ + dec->mb_x_ * 8 + uv_offset; - uint8_t* const vdst = dec->cache_v_ + dec->mb_x_ * 8 + uv_offset; - for (y = 0; y < 16; ++y) { - memcpy(ydst + y * dec->cache_y_stride_, - dec->yuv_b_ + Y_OFF + y * BPS, 16); - } - for (y = 0; y < 8; ++y) { - memcpy(udst + y * dec->cache_uv_stride_, - dec->yuv_b_ + U_OFF + y * BPS, 8); - memcpy(vdst + y * dec->cache_uv_stride_, - dec->yuv_b_ + V_OFF + y * BPS, 8); +} + +static void DitherRow(VP8Decoder* const dec) { + int mb_x; + assert(dec->dither_); + for (mb_x = dec->tl_mb_x_; mb_x < dec->br_mb_x_; ++mb_x) { + const VP8ThreadContext* const ctx = &dec->thread_ctx_; + const VP8MBData* const data = ctx->mb_data_ + mb_x; + const int cache_id = ctx->id_; + const int uv_bps = dec->cache_uv_stride_; + if (data->dither_ >= MIN_DITHER_AMP) { + uint8_t* const u_dst = dec->cache_u_ + cache_id * 8 * uv_bps + mb_x * 8; + uint8_t* const v_dst = dec->cache_v_ + cache_id * 8 * uv_bps + mb_x * 8; + Dither8x8(&dec->dithering_rg_, u_dst, uv_bps, data->dither_); + Dither8x8(&dec->dithering_rg_, v_dst, uv_bps, data->dither_); } } } @@ -165,25 +413,35 @@ void VP8StoreBlock(VP8Decoder* const dec) { static int FinishRow(VP8Decoder* const dec, VP8Io* const io) { int ok = 1; const VP8ThreadContext* const ctx = &dec->thread_ctx_; + const int cache_id = ctx->id_; const int extra_y_rows = kFilterExtraRows[dec->filter_type_]; const int ysize = extra_y_rows * dec->cache_y_stride_; const int uvsize = (extra_y_rows / 2) * dec->cache_uv_stride_; - const int y_offset = ctx->id_ * 16 * dec->cache_y_stride_; - const int uv_offset = ctx->id_ * 8 * dec->cache_uv_stride_; + const int y_offset = cache_id * 16 * dec->cache_y_stride_; + const int uv_offset = cache_id * 8 * dec->cache_uv_stride_; uint8_t* const ydst = dec->cache_y_ - ysize + y_offset; uint8_t* const udst = dec->cache_u_ - uvsize + uv_offset; uint8_t* const vdst = dec->cache_v_ - uvsize + uv_offset; - const int first_row = (ctx->mb_y_ == 0); - const int last_row = (ctx->mb_y_ >= dec->br_mb_y_ - 1); - int y_start = MACROBLOCK_VPOS(ctx->mb_y_); - int y_end = MACROBLOCK_VPOS(ctx->mb_y_ + 1); + const int mb_y = ctx->mb_y_; + const int is_first_row = (mb_y == 0); + const int is_last_row = (mb_y >= dec->br_mb_y_ - 1); + + if (dec->mt_method_ == 2) { + ReconstructRow(dec, ctx); + } if (ctx->filter_row_) { FilterRow(dec); } - if (io->put) { - if (!first_row) { + if (dec->dither_) { + DitherRow(dec); + } + + if (io->put != NULL) { + int y_start = MACROBLOCK_VPOS(mb_y); + int y_end = MACROBLOCK_VPOS(mb_y + 1); + if (!is_first_row) { y_start -= extra_y_rows; io->y = ydst; io->u = udst; @@ -194,7 +452,7 @@ static int FinishRow(VP8Decoder* const dec, VP8Io* const io) { io->v = dec->cache_v_ + uv_offset; } - if (!last_row) { + if (!is_last_row) { y_end -= extra_y_rows; } if (y_end > io->crop_bottom) { @@ -202,11 +460,8 @@ static int FinishRow(VP8Decoder* const dec, VP8Io* const io) { } io->a = NULL; if (dec->alpha_data_ != NULL && y_start < y_end) { - // TODO(skal): several things to correct here: - // * testing presence of alpha with dec->alpha_data_ is not a good idea - // * we're actually decompressing the full plane only once. It should be - // more obvious from signature. - // * we could free alpha_data_ right after this call, but we don't own. + // TODO(skal): testing presence of alpha with dec->alpha_data_ is not a + // good idea. io->a = VP8DecompressAlphaRows(dec, y_start, y_end - y_start); if (io->a == NULL) { return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, @@ -238,8 +493,8 @@ static int FinishRow(VP8Decoder* const dec, VP8Io* const io) { } } // rotate top samples if needed - if (ctx->id_ + 1 == dec->num_caches_) { - if (!last_row) { + if (cache_id + 1 == dec->num_caches_) { + if (!is_last_row) { memcpy(dec->cache_y_ - ysize, ydst + 16 * dec->cache_y_stride_, ysize); memcpy(dec->cache_u_ - uvsize, udst + 8 * dec->cache_uv_stride_, uvsize); memcpy(dec->cache_v_ - uvsize, vdst + 8 * dec->cache_uv_stride_, uvsize); @@ -256,27 +511,40 @@ static int FinishRow(VP8Decoder* const dec, VP8Io* const io) { int VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io) { int ok = 1; VP8ThreadContext* const ctx = &dec->thread_ctx_; - if (!dec->use_threads_) { + const int filter_row = + (dec->filter_type_ > 0) && + (dec->mb_y_ >= dec->tl_mb_y_) && (dec->mb_y_ <= dec->br_mb_y_); + if (dec->mt_method_ == 0) { // ctx->id_ and ctx->f_info_ are already set ctx->mb_y_ = dec->mb_y_; - ctx->filter_row_ = dec->filter_row_; + ctx->filter_row_ = filter_row; + ReconstructRow(dec, ctx); ok = FinishRow(dec, io); } else { WebPWorker* const worker = &dec->worker_; // Finish previous job *before* updating context - ok &= WebPWorkerSync(worker); + ok &= WebPGetWorkerInterface()->Sync(worker); assert(worker->status_ == OK); if (ok) { // spawn a new deblocking/output job ctx->io_ = *io; ctx->id_ = dec->cache_id_; ctx->mb_y_ = dec->mb_y_; - ctx->filter_row_ = dec->filter_row_; - if (ctx->filter_row_) { // just swap filter info + ctx->filter_row_ = filter_row; + if (dec->mt_method_ == 2) { // swap macroblock data + VP8MBData* const tmp = ctx->mb_data_; + ctx->mb_data_ = dec->mb_data_; + dec->mb_data_ = tmp; + } else { + // perform reconstruction directly in main thread + ReconstructRow(dec, ctx); + } + if (filter_row) { // swap filter info VP8FInfo* const tmp = ctx->f_info_; ctx->f_info_ = dec->f_info_; dec->f_info_ = tmp; } - WebPWorkerLaunch(worker); + // (reconstruct)+filter in parallel + WebPGetWorkerInterface()->Launch(worker); if (++dec->cache_id_ == dec->num_caches_) { dec->cache_id_ = 0; } @@ -290,8 +558,8 @@ int VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io) { VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io) { // Call setup() first. This may trigger additional decoding features on 'io'. - // Note: Afterward, we must call teardown() not matter what. - if (io->setup && !io->setup(io)) { + // Note: Afterward, we must call teardown() no matter what. + if (io->setup != NULL && !io->setup(io)) { VP8SetError(dec, VP8_STATUS_USER_ABORT, "Frame setup failed"); return dec->status_; } @@ -304,7 +572,7 @@ VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io) { // Define the area where we can skip in-loop filtering, in case of cropping. // - // 'Simple' filter reads two luma samples outside of the macroblock and + // 'Simple' filter reads two luma samples outside of the macroblock // and filters one. It doesn't filter the chroma samples. Hence, we can // avoid doing the in-loop filtering before crop_top/crop_left position. // For the 'Complex' filter, 3 samples are read and up to 3 are filtered. @@ -339,16 +607,17 @@ VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io) { dec->br_mb_y_ = dec->mb_h_; } } + PrecomputeFilterStrengths(dec); return VP8_STATUS_OK; } int VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io) { int ok = 1; - if (dec->use_threads_) { - ok = WebPWorkerSync(&dec->worker_); + if (dec->mt_method_ > 0) { + ok = WebPGetWorkerInterface()->Sync(&dec->worker_); } - if (io->teardown) { + if (io->teardown != NULL) { io->teardown(io); } return ok; @@ -384,9 +653,9 @@ int VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io) { // Initialize multi/single-thread worker static int InitThreadContext(VP8Decoder* const dec) { dec->cache_id_ = 0; - if (dec->use_threads_) { + if (dec->mt_method_ > 0) { WebPWorker* const worker = &dec->worker_; - if (!WebPWorkerReset(worker)) { + if (!WebPGetWorkerInterface()->Reset(worker)) { return VP8SetError(dec, VP8_STATUS_OUT_OF_MEMORY, "thread initialization failed."); } @@ -401,6 +670,28 @@ static int InitThreadContext(VP8Decoder* const dec) { return 1; } +int VP8GetThreadMethod(const WebPDecoderOptions* const options, + const WebPHeaderStructure* const headers, + int width, int height) { + if (options == NULL || options->use_threads == 0) { + return 0; + } + (void)headers; + (void)width; + (void)height; + assert(headers == NULL || !headers->is_lossless); +#if defined(WEBP_USE_THREAD) + if (width < MIN_WIDTH_FOR_THREADS) return 0; + // TODO(skal): tune the heuristic further +#if 0 + if (height < 2 * width) return 2; +#endif + return 2; +#else // !WEBP_USE_THREAD + return 0; +#endif +} + #undef MT_CACHE_LINES #undef ST_CACHE_LINES @@ -412,14 +703,15 @@ static int AllocateMemory(VP8Decoder* const dec) { const int mb_w = dec->mb_w_; // Note: we use 'size_t' when there's no overflow risk, uint64_t otherwise. const size_t intra_pred_mode_size = 4 * mb_w * sizeof(uint8_t); - const size_t top_size = (16 + 8 + 8) * mb_w; + const size_t top_size = sizeof(VP8TopSamples) * mb_w; const size_t mb_info_size = (mb_w + 1) * sizeof(VP8MB); const size_t f_info_size = (dec->filter_type_ > 0) ? - mb_w * (dec->use_threads_ ? 2 : 1) * sizeof(VP8FInfo) + mb_w * (dec->mt_method_ > 0 ? 2 : 1) * sizeof(VP8FInfo) : 0; const size_t yuv_size = YUV_SIZE * sizeof(*dec->yuv_b_); - const size_t coeffs_size = 384 * sizeof(*dec->coeffs_); + const size_t mb_data_size = + (dec->mt_method_ == 2 ? 2 : 1) * mb_w * sizeof(*dec->mb_data_); const size_t cache_height = (16 * num_caches + kFilterExtraRows[dec->filter_type_]) * 3 / 2; const size_t cache_size = top_size * cache_height; @@ -428,13 +720,13 @@ static int AllocateMemory(VP8Decoder* const dec) { (uint64_t)dec->pic_hdr_.width_ * dec->pic_hdr_.height_ : 0ULL; const uint64_t needed = (uint64_t)intra_pred_mode_size + top_size + mb_info_size + f_info_size - + yuv_size + coeffs_size - + cache_size + alpha_size + ALIGN_MASK; + + yuv_size + mb_data_size + + cache_size + alpha_size + WEBP_ALIGN_CST; uint8_t* mem; if (needed != (size_t)needed) return 0; // check for overflow if (needed > dec->mem_size_) { - free(dec->mem_); + WebPSafeFree(dec->mem_); dec->mem_size_ = 0; dec->mem_ = WebPSafeMalloc(needed, sizeof(uint8_t)); if (dec->mem_ == NULL) { @@ -449,12 +741,8 @@ static int AllocateMemory(VP8Decoder* const dec) { dec->intra_t_ = (uint8_t*)mem; mem += intra_pred_mode_size; - dec->y_t_ = (uint8_t*)mem; - mem += 16 * mb_w; - dec->u_t_ = (uint8_t*)mem; - mem += 8 * mb_w; - dec->v_t_ = (uint8_t*)mem; - mem += 8 * mb_w; + dec->yuv_t_ = (VP8TopSamples*)mem; + mem += top_size; dec->mb_info_ = ((VP8MB*)mem) + 1; mem += mb_info_size; @@ -463,20 +751,24 @@ static int AllocateMemory(VP8Decoder* const dec) { mem += f_info_size; dec->thread_ctx_.id_ = 0; dec->thread_ctx_.f_info_ = dec->f_info_; - if (dec->use_threads_) { + if (dec->mt_method_ > 0) { // secondary cache line. The deblocking process need to make use of the // filtering strength from previous macroblock row, while the new ones // are being decoded in parallel. We'll just swap the pointers. dec->thread_ctx_.f_info_ += mb_w; } - mem = (uint8_t*)((uintptr_t)(mem + ALIGN_MASK) & ~ALIGN_MASK); - assert((yuv_size & ALIGN_MASK) == 0); + mem = (uint8_t*)WEBP_ALIGN(mem); + assert((yuv_size & WEBP_ALIGN_CST) == 0); dec->yuv_b_ = (uint8_t*)mem; mem += yuv_size; - dec->coeffs_ = (int16_t*)mem; - mem += coeffs_size; + dec->mb_data_ = (VP8MBData*)mem; + dec->thread_ctx_.mb_data_ = (VP8MBData*)mem; + if (dec->mt_method_ == 2) { + dec->thread_ctx_.mb_data_ += mb_w; + } + mem += mb_data_size; dec->cache_y_stride_ = 16 * mb_w; dec->cache_uv_stride_ = 8 * mb_w; @@ -496,9 +788,11 @@ static int AllocateMemory(VP8Decoder* const dec) { // alpha plane dec->alpha_plane_ = alpha_size ? (uint8_t*)mem : NULL; mem += alpha_size; + assert(mem <= (uint8_t*)dec->mem_ + dec->mem_size_); - // note: left-info is initialized once for all. + // note: left/top-info is initialized once for all. memset(dec->mb_info_ - 1, 0, mb_info_size); + VP8InitScanline(dec); // initialize left too. // initialize top memset(dec->intra_t_, B_DC_PRED, intra_pred_mode_size); @@ -517,7 +811,7 @@ static void InitIo(VP8Decoder* const dec, VP8Io* io) { io->a = NULL; } -int VP8InitFrame(VP8Decoder* const dec, VP8Io* io) { +int VP8InitFrame(VP8Decoder* const dec, VP8Io* const io) { if (!InitThreadContext(dec)) return 0; // call first. Sets dec->num_caches_. if (!AllocateMemory(dec)) return 0; InitIo(dec, io); @@ -526,154 +820,3 @@ int VP8InitFrame(VP8Decoder* const dec, VP8Io* io) { } //------------------------------------------------------------------------------ -// Main reconstruction function. - -static const int kScan[16] = { - 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS, - 0 + 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS, - 0 + 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS, - 0 + 12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS -}; - -static WEBP_INLINE int CheckMode(VP8Decoder* const dec, int mode) { - if (mode == B_DC_PRED) { - if (dec->mb_x_ == 0) { - return (dec->mb_y_ == 0) ? B_DC_PRED_NOTOPLEFT : B_DC_PRED_NOLEFT; - } else { - return (dec->mb_y_ == 0) ? B_DC_PRED_NOTOP : B_DC_PRED; - } - } - return mode; -} - -static WEBP_INLINE void Copy32b(uint8_t* dst, uint8_t* src) { - *(uint32_t*)dst = *(uint32_t*)src; -} - -void VP8ReconstructBlock(VP8Decoder* const dec) { - uint8_t* const y_dst = dec->yuv_b_ + Y_OFF; - uint8_t* const u_dst = dec->yuv_b_ + U_OFF; - uint8_t* const v_dst = dec->yuv_b_ + V_OFF; - - // Rotate in the left samples from previously decoded block. We move four - // pixels at a time for alignment reason, and because of in-loop filter. - if (dec->mb_x_ > 0) { - int j; - for (j = -1; j < 16; ++j) { - Copy32b(&y_dst[j * BPS - 4], &y_dst[j * BPS + 12]); - } - for (j = -1; j < 8; ++j) { - Copy32b(&u_dst[j * BPS - 4], &u_dst[j * BPS + 4]); - Copy32b(&v_dst[j * BPS - 4], &v_dst[j * BPS + 4]); - } - } else { - int j; - for (j = 0; j < 16; ++j) { - y_dst[j * BPS - 1] = 129; - } - for (j = 0; j < 8; ++j) { - u_dst[j * BPS - 1] = 129; - v_dst[j * BPS - 1] = 129; - } - // Init top-left sample on left column too - if (dec->mb_y_ > 0) { - y_dst[-1 - BPS] = u_dst[-1 - BPS] = v_dst[-1 - BPS] = 129; - } - } - { - // bring top samples into the cache - uint8_t* const top_y = dec->y_t_ + dec->mb_x_ * 16; - uint8_t* const top_u = dec->u_t_ + dec->mb_x_ * 8; - uint8_t* const top_v = dec->v_t_ + dec->mb_x_ * 8; - const int16_t* coeffs = dec->coeffs_; - int n; - - if (dec->mb_y_ > 0) { - memcpy(y_dst - BPS, top_y, 16); - memcpy(u_dst - BPS, top_u, 8); - memcpy(v_dst - BPS, top_v, 8); - } else if (dec->mb_x_ == 0) { - // we only need to do this init once at block (0,0). - // Afterward, it remains valid for the whole topmost row. - memset(y_dst - BPS - 1, 127, 16 + 4 + 1); - memset(u_dst - BPS - 1, 127, 8 + 1); - memset(v_dst - BPS - 1, 127, 8 + 1); - } - - // predict and add residuals - - if (dec->is_i4x4_) { // 4x4 - uint32_t* const top_right = (uint32_t*)(y_dst - BPS + 16); - - if (dec->mb_y_ > 0) { - if (dec->mb_x_ >= dec->mb_w_ - 1) { // on rightmost border - top_right[0] = top_y[15] * 0x01010101u; - } else { - memcpy(top_right, top_y + 16, sizeof(*top_right)); - } - } - // replicate the top-right pixels below - top_right[BPS] = top_right[2 * BPS] = top_right[3 * BPS] = top_right[0]; - - // predict and add residues for all 4x4 blocks in turn. - for (n = 0; n < 16; n++) { - uint8_t* const dst = y_dst + kScan[n]; - VP8PredLuma4[dec->imodes_[n]](dst); - if (dec->non_zero_ac_ & (1 << n)) { - VP8Transform(coeffs + n * 16, dst, 0); - } else if (dec->non_zero_ & (1 << n)) { // only DC is present - VP8TransformDC(coeffs + n * 16, dst); - } - } - } else { // 16x16 - const int pred_func = CheckMode(dec, dec->imodes_[0]); - VP8PredLuma16[pred_func](y_dst); - if (dec->non_zero_) { - for (n = 0; n < 16; n++) { - uint8_t* const dst = y_dst + kScan[n]; - if (dec->non_zero_ac_ & (1 << n)) { - VP8Transform(coeffs + n * 16, dst, 0); - } else if (dec->non_zero_ & (1 << n)) { // only DC is present - VP8TransformDC(coeffs + n * 16, dst); - } - } - } - } - { - // Chroma - const int pred_func = CheckMode(dec, dec->uvmode_); - VP8PredChroma8[pred_func](u_dst); - VP8PredChroma8[pred_func](v_dst); - - if (dec->non_zero_ & 0x0f0000) { // chroma-U - const int16_t* const u_coeffs = dec->coeffs_ + 16 * 16; - if (dec->non_zero_ac_ & 0x0f0000) { - VP8TransformUV(u_coeffs, u_dst); - } else { - VP8TransformDCUV(u_coeffs, u_dst); - } - } - if (dec->non_zero_ & 0xf00000) { // chroma-V - const int16_t* const v_coeffs = dec->coeffs_ + 20 * 16; - if (dec->non_zero_ac_ & 0xf00000) { - VP8TransformUV(v_coeffs, v_dst); - } else { - VP8TransformDCUV(v_coeffs, v_dst); - } - } - - // stash away top samples for next block - if (dec->mb_y_ < dec->mb_h_ - 1) { - memcpy(top_y, y_dst + 15 * BPS, 16); - memcpy(top_u, u_dst + 7 * BPS, 8); - memcpy(top_v, v_dst + 7 * BPS, 8); - } - } - } -} - -//------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/idec.c b/drivers/webp/dec/idec.c index 7df790ced8..abafb9f3d1 100644 --- a/drivers/webp/dec/idec.c +++ b/drivers/webp/dec/idec.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Incremental decoding @@ -13,14 +15,11 @@ #include <string.h> #include <stdlib.h> +#include "./alphai.h" #include "./webpi.h" #include "./vp8i.h" #include "../utils/utils.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - // In append mode, buffer allocations increase as multiples of this value. // Needs to be a power of 2. #define CHUNK_SIZE 4096 @@ -29,11 +28,13 @@ extern "C" { //------------------------------------------------------------------------------ // Data structures for memory and states -// Decoding states. State normally flows like HEADER->PARTS0->DATA->DONE. +// Decoding states. State normally flows as: +// WEBP_HEADER->VP8_HEADER->VP8_PARTS0->VP8_DATA->DONE for a lossy image, and +// WEBP_HEADER->VP8L_HEADER->VP8L_DATA->DONE for a lossless image. // If there is any error the decoder goes into state ERROR. typedef enum { - STATE_PRE_VP8, // All data before that of the first VP8 chunk. - STATE_VP8_FRAME_HEADER, // For VP8 Frame header (within VP8 chunk). + STATE_WEBP_HEADER, // All the data before that of the VP8/VP8L chunk. + STATE_VP8_HEADER, // The VP8 Frame header (within the VP8 chunk). STATE_VP8_PARTS0, STATE_VP8_DATA, STATE_VP8L_HEADER, @@ -71,32 +72,41 @@ struct WebPIDecoder { MemBuffer mem_; // input memory buffer. WebPDecBuffer output_; // output buffer (when no external one is supplied) size_t chunk_size_; // Compressed VP8/VP8L size extracted from Header. + + int last_mb_y_; // last row reached for intra-mode decoding }; // MB context to restore in case VP8DecodeMB() fails typedef struct { VP8MB left_; VP8MB info_; - uint8_t intra_t_[4]; - uint8_t intra_l_[4]; - VP8BitReader br_; VP8BitReader token_br_; } MBContext; //------------------------------------------------------------------------------ // MemBuffer: incoming data handling -static void RemapBitReader(VP8BitReader* const br, ptrdiff_t offset) { - if (br->buf_ != NULL) { - br->buf_ += offset; - br->buf_end_ += offset; - } -} - static WEBP_INLINE size_t MemDataSize(const MemBuffer* mem) { return (mem->end_ - mem->start_); } +// Check if we need to preserve the compressed alpha data, as it may not have +// been decoded yet. +static int NeedCompressedAlpha(const WebPIDecoder* const idec) { + if (idec->state_ == STATE_WEBP_HEADER) { + // We haven't parsed the headers yet, so we don't know whether the image is + // lossy or lossless. This also means that we haven't parsed the ALPH chunk. + return 0; + } + if (idec->is_lossless_) { + return 0; // ALPH chunk is not present for lossless images. + } else { + const VP8Decoder* const dec = (VP8Decoder*)idec->dec_; + assert(dec != NULL); // Must be true as idec->state_ != STATE_WEBP_HEADER. + return (dec->alpha_data_ != NULL) && !dec->is_alpha_decoded_; + } +} + static void DoRemap(WebPIDecoder* const idec, ptrdiff_t offset) { MemBuffer* const mem = &idec->mem_; const uint8_t* const new_base = mem->buf_ + mem->start_; @@ -112,16 +122,36 @@ static void DoRemap(WebPIDecoder* const idec, ptrdiff_t offset) { if (offset != 0) { int p; for (p = 0; p <= last_part; ++p) { - RemapBitReader(dec->parts_ + p, offset); + VP8RemapBitReader(dec->parts_ + p, offset); } // Remap partition #0 data pointer to new offset, but only in MAP // mode (in APPEND mode, partition #0 is copied into a fixed memory). if (mem->mode_ == MEM_MODE_MAP) { - RemapBitReader(&dec->br_, offset); + VP8RemapBitReader(&dec->br_, offset); + } + } + { + const uint8_t* const last_start = dec->parts_[last_part].buf_; + assert(last_part >= 0); + VP8BitReaderSetBuffer(&dec->parts_[last_part], last_start, + mem->buf_ + mem->end_ - last_start); + } + if (NeedCompressedAlpha(idec)) { + ALPHDecoder* const alph_dec = dec->alph_dec_; + dec->alpha_data_ += offset; + if (alph_dec != NULL) { + if (alph_dec->method_ == ALPHA_LOSSLESS_COMPRESSION) { + VP8LDecoder* const alph_vp8l_dec = alph_dec->vp8l_dec_; + assert(alph_vp8l_dec != NULL); + assert(dec->alpha_data_size_ >= ALPHA_HEADER_LEN); + VP8LBitReaderSetBuffer(&alph_vp8l_dec->br_, + dec->alpha_data_ + ALPHA_HEADER_LEN, + dec->alpha_data_size_ - ALPHA_HEADER_LEN); + } else { // alph_dec->method_ == ALPHA_NO_COMPRESSION + // Nothing special to do in this case. + } } } - assert(last_part >= 0); - dec->parts_[last_part].buf_end_ = mem->buf_ + mem->end_; } else { // Resize lossless bitreader VP8LDecoder* const dec = (VP8LDecoder*)idec->dec_; VP8LBitReaderSetBuffer(&dec->br_, new_base, MemDataSize(mem)); @@ -133,8 +163,12 @@ static void DoRemap(WebPIDecoder* const idec, ptrdiff_t offset) { // size if required and also updates VP8BitReader's if new memory is allocated. static int AppendToMemBuffer(WebPIDecoder* const idec, const uint8_t* const data, size_t data_size) { + VP8Decoder* const dec = (VP8Decoder*)idec->dec_; MemBuffer* const mem = &idec->mem_; - const uint8_t* const old_base = mem->buf_ + mem->start_; + const int need_compressed_alpha = NeedCompressedAlpha(idec); + const uint8_t* const old_start = mem->buf_ + mem->start_; + const uint8_t* const old_base = + need_compressed_alpha ? dec->alpha_data_ : old_start; assert(mem->mode_ == MEM_MODE_APPEND); if (data_size > MAX_CHUNK_PAYLOAD) { // security safeguard: trying to allocate more than what the format @@ -143,17 +177,18 @@ static int AppendToMemBuffer(WebPIDecoder* const idec, } if (mem->end_ + data_size > mem->buf_size_) { // Need some free memory - const size_t current_size = MemDataSize(mem); + const size_t new_mem_start = old_start - old_base; + const size_t current_size = MemDataSize(mem) + new_mem_start; const uint64_t new_size = (uint64_t)current_size + data_size; const uint64_t extra_size = (new_size + CHUNK_SIZE - 1) & ~(CHUNK_SIZE - 1); uint8_t* const new_buf = (uint8_t*)WebPSafeMalloc(extra_size, sizeof(*new_buf)); if (new_buf == NULL) return 0; memcpy(new_buf, old_base, current_size); - free(mem->buf_); + WebPSafeFree(mem->buf_); mem->buf_ = new_buf; mem->buf_size_ = (size_t)extra_size; - mem->start_ = 0; + mem->start_ = new_mem_start; mem->end_ = current_size; } @@ -161,14 +196,15 @@ static int AppendToMemBuffer(WebPIDecoder* const idec, mem->end_ += data_size; assert(mem->end_ <= mem->buf_size_); - DoRemap(idec, mem->buf_ + mem->start_ - old_base); + DoRemap(idec, mem->buf_ + mem->start_ - old_start); return 1; } static int RemapMemBuffer(WebPIDecoder* const idec, const uint8_t* const data, size_t data_size) { MemBuffer* const mem = &idec->mem_; - const uint8_t* const old_base = mem->buf_ + mem->start_; + const uint8_t* const old_buf = mem->buf_; + const uint8_t* const old_start = old_buf + mem->start_; assert(mem->mode_ == MEM_MODE_MAP); if (data_size < mem->buf_size_) return 0; // can't remap to a shorter buffer! @@ -176,7 +212,7 @@ static int RemapMemBuffer(WebPIDecoder* const idec, mem->buf_ = (uint8_t*)data; mem->end_ = mem->buf_size_ = data_size; - DoRemap(idec, mem->buf_ + mem->start_ - old_base); + DoRemap(idec, mem->buf_ + mem->start_ - old_start); return 1; } @@ -191,8 +227,8 @@ static void InitMemBuffer(MemBuffer* const mem) { static void ClearMemBuffer(MemBuffer* const mem) { assert(mem); if (mem->mode_ == MEM_MODE_APPEND) { - free(mem->buf_); - free((void*)mem->part0_buf_); + WebPSafeFree(mem->buf_); + WebPSafeFree((void*)mem->part0_buf_); } } @@ -206,35 +242,34 @@ static int CheckMemBufferMode(MemBuffer* const mem, MemBufferMode expected) { return 1; } +// To be called last. +static VP8StatusCode FinishDecoding(WebPIDecoder* const idec) { + const WebPDecoderOptions* const options = idec->params_.options; + WebPDecBuffer* const output = idec->params_.output; + + idec->state_ = STATE_DONE; + if (options != NULL && options->flip) { + return WebPFlipBuffer(output); + } else { + return VP8_STATUS_OK; + } +} + //------------------------------------------------------------------------------ // Macroblock-decoding contexts static void SaveContext(const VP8Decoder* dec, const VP8BitReader* token_br, MBContext* const context) { - const VP8BitReader* const br = &dec->br_; - const VP8MB* const left = dec->mb_info_ - 1; - const VP8MB* const info = dec->mb_info_ + dec->mb_x_; - - context->left_ = *left; - context->info_ = *info; - context->br_ = *br; + context->left_ = dec->mb_info_[-1]; + context->info_ = dec->mb_info_[dec->mb_x_]; context->token_br_ = *token_br; - memcpy(context->intra_t_, dec->intra_t_ + 4 * dec->mb_x_, 4); - memcpy(context->intra_l_, dec->intra_l_, 4); } static void RestoreContext(const MBContext* context, VP8Decoder* const dec, VP8BitReader* const token_br) { - VP8BitReader* const br = &dec->br_; - VP8MB* const left = dec->mb_info_ - 1; - VP8MB* const info = dec->mb_info_ + dec->mb_x_; - - *left = context->left_; - *info = context->info_; - *br = context->br_; + dec->mb_info_[-1] = context->left_; + dec->mb_info_[dec->mb_x_] = context->info_; *token_br = context->token_br_; - memcpy(dec->intra_t_ + 4 * dec->mb_x_, context->intra_t_, 4); - memcpy(dec->intra_l_, context->intra_l_, 4); } //------------------------------------------------------------------------------ @@ -242,7 +277,7 @@ static void RestoreContext(const MBContext* context, VP8Decoder* const dec, static VP8StatusCode IDecError(WebPIDecoder* const idec, VP8StatusCode error) { if (idec->state_ == STATE_VP8_DATA) { VP8Io* const io = &idec->io_; - if (io->teardown) { + if (io->teardown != NULL) { io->teardown(io); } } @@ -270,6 +305,7 @@ static VP8StatusCode DecodeWebPHeaders(WebPIDecoder* const idec) { headers.data = data; headers.data_size = curr_size; + headers.have_all_data = 0; status = WebPParseHeaders(&headers); if (status == VP8_STATUS_NOT_ENOUGH_DATA) { return VP8_STATUS_SUSPENDED; // We haven't found a VP8 chunk yet. @@ -285,15 +321,9 @@ static VP8StatusCode DecodeWebPHeaders(WebPIDecoder* const idec) { return VP8_STATUS_OUT_OF_MEMORY; } idec->dec_ = dec; -#ifdef WEBP_USE_THREAD - dec->use_threads_ = (idec->params_.options != NULL) && - (idec->params_.options->use_threads > 0); -#else - dec->use_threads_ = 0; -#endif dec->alpha_data_ = headers.alpha_data; dec->alpha_data_size_ = headers.alpha_data_size; - ChangeState(idec, STATE_VP8_FRAME_HEADER, headers.offset); + ChangeState(idec, STATE_VP8_HEADER, headers.offset); } else { VP8LDecoder* const dec = VP8LNew(); if (dec == NULL) { @@ -308,13 +338,14 @@ static VP8StatusCode DecodeWebPHeaders(WebPIDecoder* const idec) { static VP8StatusCode DecodeVP8FrameHeader(WebPIDecoder* const idec) { const uint8_t* data = idec->mem_.buf_ + idec->mem_.start_; const size_t curr_size = MemDataSize(&idec->mem_); + int width, height; uint32_t bits; if (curr_size < VP8_FRAME_HEADER_SIZE) { // Not enough data bytes to extract VP8 Frame Header. return VP8_STATUS_SUSPENDED; } - if (!VP8GetInfo(data, curr_size, idec->chunk_size_, NULL, NULL)) { + if (!VP8GetInfo(data, curr_size, idec->chunk_size_, &width, &height)) { return IDecError(idec, VP8_STATUS_BITSTREAM_ERROR); } @@ -328,30 +359,32 @@ static VP8StatusCode DecodeVP8FrameHeader(WebPIDecoder* const idec) { } // Partition #0 -static int CopyParts0Data(WebPIDecoder* const idec) { +static VP8StatusCode CopyParts0Data(WebPIDecoder* const idec) { VP8Decoder* const dec = (VP8Decoder*)idec->dec_; VP8BitReader* const br = &dec->br_; - const size_t psize = br->buf_end_ - br->buf_; + const size_t part_size = br->buf_end_ - br->buf_; MemBuffer* const mem = &idec->mem_; assert(!idec->is_lossless_); assert(mem->part0_buf_ == NULL); - assert(psize > 0); - assert(psize <= mem->part0_size_); // Format limit: no need for runtime check + // the following is a format limitation, no need for runtime check: + assert(part_size <= mem->part0_size_); + if (part_size == 0) { // can't have zero-size partition #0 + return VP8_STATUS_BITSTREAM_ERROR; + } if (mem->mode_ == MEM_MODE_APPEND) { // We copy and grab ownership of the partition #0 data. - uint8_t* const part0_buf = (uint8_t*)malloc(psize); + uint8_t* const part0_buf = (uint8_t*)WebPSafeMalloc(1ULL, part_size); if (part0_buf == NULL) { - return 0; + return VP8_STATUS_OUT_OF_MEMORY; } - memcpy(part0_buf, br->buf_, psize); + memcpy(part0_buf, br->buf_, part_size); mem->part0_buf_ = part0_buf; - br->buf_ = part0_buf; - br->buf_end_ = part0_buf + psize; + VP8BitReaderSetBuffer(br, part0_buf, part_size); } else { // Else: just keep pointers to the partition #0's data in dec_->br_. } - mem->start_ += psize; - return 1; + mem->start_ += part_size; + return VP8_STATUS_OK; } static VP8StatusCode DecodePartition0(WebPIDecoder* const idec) { @@ -381,9 +414,14 @@ static VP8StatusCode DecodePartition0(WebPIDecoder* const idec) { if (dec->status_ != VP8_STATUS_OK) { return IDecError(idec, dec->status_); } + // This change must be done before calling VP8InitFrame() + dec->mt_method_ = VP8GetThreadMethod(params->options, NULL, + io->width, io->height); + VP8InitDithering(params->options, dec); - if (!CopyParts0Data(idec)) { - return IDecError(idec, VP8_STATUS_OUT_OF_MEMORY); + dec->status_ = CopyParts0Data(idec); + if (dec->status_ != VP8_STATUS_OK) { + return IDecError(idec, dec->status_); } // Finish setting up the decoding parameters. Will call io->setup(). @@ -407,50 +445,52 @@ static VP8StatusCode DecodeRemaining(WebPIDecoder* const idec) { VP8Io* const io = &idec->io_; assert(dec->ready_); - for (; dec->mb_y_ < dec->mb_h_; ++dec->mb_y_) { - VP8BitReader* token_br = &dec->parts_[dec->mb_y_ & (dec->num_parts_ - 1)]; - if (dec->mb_x_ == 0) { - VP8InitScanline(dec); + if (idec->last_mb_y_ != dec->mb_y_) { + if (!VP8ParseIntraModeRow(&dec->br_, dec)) { + // note: normally, error shouldn't occur since we already have the whole + // partition0 available here in DecodeRemaining(). Reaching EOF while + // reading intra modes really means a BITSTREAM_ERROR. + return IDecError(idec, VP8_STATUS_BITSTREAM_ERROR); + } + idec->last_mb_y_ = dec->mb_y_; } - for (; dec->mb_x_ < dec->mb_w_; dec->mb_x_++) { + for (; dec->mb_x_ < dec->mb_w_; ++dec->mb_x_) { + VP8BitReader* const token_br = + &dec->parts_[dec->mb_y_ & (dec->num_parts_ - 1)]; MBContext context; SaveContext(dec, token_br, &context); - if (!VP8DecodeMB(dec, token_br)) { - RestoreContext(&context, dec, token_br); // We shouldn't fail when MAX_MB data was available if (dec->num_parts_ == 1 && MemDataSize(&idec->mem_) > MAX_MB_SIZE) { return IDecError(idec, VP8_STATUS_BITSTREAM_ERROR); } + RestoreContext(&context, dec, token_br); return VP8_STATUS_SUSPENDED; } - VP8ReconstructBlock(dec); - // Store data and save block's filtering params - VP8StoreBlock(dec); - // Release buffer only if there is only one partition if (dec->num_parts_ == 1) { idec->mem_.start_ = token_br->buf_ - idec->mem_.buf_; assert(idec->mem_.start_ <= idec->mem_.end_); } } + VP8InitScanline(dec); // Prepare for next scanline + + // Reconstruct, filter and emit the row. if (!VP8ProcessRow(dec, io)) { return IDecError(idec, VP8_STATUS_USER_ABORT); } - dec->mb_x_ = 0; } // Synchronize the thread and check for errors. if (!VP8ExitCritical(dec, io)) { return IDecError(idec, VP8_STATUS_USER_ABORT); } dec->ready_ = 0; - idec->state_ = STATE_DONE; - - return VP8_STATUS_OK; + return FinishDecoding(idec); } -static int ErrorStatusLossless(WebPIDecoder* const idec, VP8StatusCode status) { +static VP8StatusCode ErrorStatusLossless(WebPIDecoder* const idec, + VP8StatusCode status) { if (status == VP8_STATUS_SUSPENDED || status == VP8_STATUS_NOT_ENOUGH_DATA) { return VP8_STATUS_SUSPENDED; } @@ -467,9 +507,15 @@ static VP8StatusCode DecodeVP8LHeader(WebPIDecoder* const idec) { // Wait until there's enough data for decoding header. if (curr_size < (idec->chunk_size_ >> 3)) { - return VP8_STATUS_SUSPENDED; + dec->status_ = VP8_STATUS_SUSPENDED; + return ErrorStatusLossless(idec, dec->status_); } + if (!VP8LDecodeHeader(dec, io)) { + if (dec->status_ == VP8_STATUS_BITSTREAM_ERROR && + curr_size < idec->chunk_size_) { + dec->status_ = VP8_STATUS_SUSPENDED; + } return ErrorStatusLossless(idec, dec->status_); } // Allocate/verify output buffer now. @@ -488,33 +534,29 @@ static VP8StatusCode DecodeVP8LData(WebPIDecoder* const idec) { const size_t curr_size = MemDataSize(&idec->mem_); assert(idec->is_lossless_); - // At present Lossless decoder can't decode image incrementally. So wait till - // all the image data is aggregated before image can be decoded. - if (curr_size < idec->chunk_size_) { - return VP8_STATUS_SUSPENDED; - } + // Switch to incremental decoding if we don't have all the bytes available. + dec->incremental_ = (curr_size < idec->chunk_size_); if (!VP8LDecodeImage(dec)) { return ErrorStatusLossless(idec, dec->status_); } - - idec->state_ = STATE_DONE; - - return VP8_STATUS_OK; + assert(dec->status_ == VP8_STATUS_OK || dec->status_ == VP8_STATUS_SUSPENDED); + return (dec->status_ == VP8_STATUS_SUSPENDED) ? dec->status_ + : FinishDecoding(idec); } // Main decoding loop static VP8StatusCode IDecode(WebPIDecoder* idec) { VP8StatusCode status = VP8_STATUS_SUSPENDED; - if (idec->state_ == STATE_PRE_VP8) { + if (idec->state_ == STATE_WEBP_HEADER) { status = DecodeWebPHeaders(idec); } else { if (idec->dec_ == NULL) { return VP8_STATUS_SUSPENDED; // can't continue if we have no decoder. } } - if (idec->state_ == STATE_VP8_FRAME_HEADER) { + if (idec->state_ == STATE_VP8_HEADER) { status = DecodeVP8FrameHeader(idec); } if (idec->state_ == STATE_VP8_PARTS0) { @@ -536,20 +578,23 @@ static VP8StatusCode IDecode(WebPIDecoder* idec) { // Public functions WebPIDecoder* WebPINewDecoder(WebPDecBuffer* output_buffer) { - WebPIDecoder* idec = (WebPIDecoder*)calloc(1, sizeof(*idec)); + WebPIDecoder* idec = (WebPIDecoder*)WebPSafeCalloc(1ULL, sizeof(*idec)); if (idec == NULL) { return NULL; } - idec->state_ = STATE_PRE_VP8; + idec->state_ = STATE_WEBP_HEADER; idec->chunk_size_ = 0; + idec->last_mb_y_ = -1; + InitMemBuffer(&idec->mem_); WebPInitDecBuffer(&idec->output_); VP8InitIo(&idec->io_); WebPResetDecParams(&idec->params_); - idec->params_.output = output_buffer ? output_buffer : &idec->output_; + idec->params_.output = (output_buffer != NULL) ? output_buffer + : &idec->output_; WebPInitCustomIo(&idec->params_, &idec->io_); // Plug the I/O functions. return idec; @@ -581,14 +626,18 @@ void WebPIDelete(WebPIDecoder* idec) { if (idec == NULL) return; if (idec->dec_ != NULL) { if (!idec->is_lossless_) { - VP8Delete(idec->dec_); + if (idec->state_ == STATE_VP8_DATA) { + // Synchronize the thread, clean-up and check for errors. + VP8ExitCritical((VP8Decoder*)idec->dec_, &idec->io_); + } + VP8Delete((VP8Decoder*)idec->dec_); } else { - VP8LDelete(idec->dec_); + VP8LDelete((VP8LDecoder*)idec->dec_); } } ClearMemBuffer(&idec->mem_); WebPFreeDecBuffer(&idec->output_); - free(idec); + WebPSafeFree(idec); } //------------------------------------------------------------------------------ @@ -596,12 +645,22 @@ void WebPIDelete(WebPIDecoder* idec) { WebPIDecoder* WebPINewRGB(WEBP_CSP_MODE mode, uint8_t* output_buffer, size_t output_buffer_size, int output_stride) { + const int is_external_memory = (output_buffer != NULL); WebPIDecoder* idec; + if (mode >= MODE_YUV) return NULL; + if (!is_external_memory) { // Overwrite parameters to sane values. + output_buffer_size = 0; + output_stride = 0; + } else { // A buffer was passed. Validate the other params. + if (output_stride == 0 || output_buffer_size == 0) { + return NULL; // invalid parameter. + } + } idec = WebPINewDecoder(NULL); if (idec == NULL) return NULL; idec->output_.colorspace = mode; - idec->output_.is_external_memory = 1; + idec->output_.is_external_memory = is_external_memory; idec->output_.u.RGBA.rgba = output_buffer; idec->output_.u.RGBA.stride = output_stride; idec->output_.u.RGBA.size = output_buffer_size; @@ -612,10 +671,30 @@ WebPIDecoder* WebPINewYUVA(uint8_t* luma, size_t luma_size, int luma_stride, uint8_t* u, size_t u_size, int u_stride, uint8_t* v, size_t v_size, int v_stride, uint8_t* a, size_t a_size, int a_stride) { - WebPIDecoder* const idec = WebPINewDecoder(NULL); + const int is_external_memory = (luma != NULL); + WebPIDecoder* idec; + WEBP_CSP_MODE colorspace; + + if (!is_external_memory) { // Overwrite parameters to sane values. + luma_size = u_size = v_size = a_size = 0; + luma_stride = u_stride = v_stride = a_stride = 0; + u = v = a = NULL; + colorspace = MODE_YUVA; + } else { // A luma buffer was passed. Validate the other parameters. + if (u == NULL || v == NULL) return NULL; + if (luma_size == 0 || u_size == 0 || v_size == 0) return NULL; + if (luma_stride == 0 || u_stride == 0 || v_stride == 0) return NULL; + if (a != NULL) { + if (a_size == 0 || a_stride == 0) return NULL; + } + colorspace = (a == NULL) ? MODE_YUV : MODE_YUVA; + } + + idec = WebPINewDecoder(NULL); if (idec == NULL) return NULL; - idec->output_.colorspace = (a == NULL) ? MODE_YUV : MODE_YUVA; - idec->output_.is_external_memory = 1; + + idec->output_.colorspace = colorspace; + idec->output_.is_external_memory = is_external_memory; idec->output_.u.YUVA.y = luma; idec->output_.u.YUVA.y_stride = luma_stride; idec->output_.u.YUVA.y_size = luma_size; @@ -768,7 +847,7 @@ int WebPISetIOHooks(WebPIDecoder* const idec, VP8IoSetupHook setup, VP8IoTeardownHook teardown, void* user_data) { - if (idec == NULL || idec->state_ > STATE_PRE_VP8) { + if (idec == NULL || idec->state_ > STATE_WEBP_HEADER) { return 0; } @@ -779,7 +858,3 @@ int WebPISetIOHooks(WebPIDecoder* const idec, return 1; } - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/io.c b/drivers/webp/dec/io.c index 594804c2e6..13e469ab73 100644 --- a/drivers/webp/dec/io.c +++ b/drivers/webp/dec/io.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // functions for sample output. @@ -15,10 +17,7 @@ #include "./webpi.h" #include "../dsp/dsp.h" #include "../dsp/yuv.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "../utils/utils.h" //------------------------------------------------------------------------------ // Main YUV<->RGB conversion functions @@ -46,57 +45,17 @@ static int EmitYUV(const VP8Io* const io, WebPDecParams* const p) { // Point-sampling U/V sampler. static int EmitSampledRGB(const VP8Io* const io, WebPDecParams* const p) { - WebPDecBuffer* output = p->output; - const WebPRGBABuffer* const buf = &output->u.RGBA; - uint8_t* dst = buf->rgba + io->mb_y * buf->stride; - const uint8_t* y_src = io->y; - const uint8_t* u_src = io->u; - const uint8_t* v_src = io->v; - const WebPSampleLinePairFunc sample = WebPSamplers[output->colorspace]; - const int mb_w = io->mb_w; - const int last = io->mb_h - 1; - int j; - for (j = 0; j < last; j += 2) { - sample(y_src, y_src + io->y_stride, u_src, v_src, - dst, dst + buf->stride, mb_w); - y_src += 2 * io->y_stride; - u_src += io->uv_stride; - v_src += io->uv_stride; - dst += 2 * buf->stride; - } - if (j == last) { // Just do the last line twice - sample(y_src, y_src, u_src, v_src, dst, dst, mb_w); - } + WebPDecBuffer* const output = p->output; + WebPRGBABuffer* const buf = &output->u.RGBA; + uint8_t* const dst = buf->rgba + io->mb_y * buf->stride; + WebPSamplerProcessPlane(io->y, io->y_stride, + io->u, io->v, io->uv_stride, + dst, buf->stride, io->mb_w, io->mb_h, + WebPSamplers[output->colorspace]); return io->mb_h; } //------------------------------------------------------------------------------ -// YUV444 -> RGB conversion - -#if 0 // TODO(skal): this is for future rescaling. -static int EmitRGB(const VP8Io* const io, WebPDecParams* const p) { - WebPDecBuffer* output = p->output; - const WebPRGBABuffer* const buf = &output->u.RGBA; - uint8_t* dst = buf->rgba + io->mb_y * buf->stride; - const uint8_t* y_src = io->y; - const uint8_t* u_src = io->u; - const uint8_t* v_src = io->v; - const WebPYUV444Converter convert = WebPYUV444Converters[output->colorspace]; - const int mb_w = io->mb_w; - const int last = io->mb_h; - int j; - for (j = 0; j < last; ++j) { - convert(y_src, u_src, v_src, dst, mb_w); - y_src += io->y_stride; - u_src += io->uv_stride; - v_src += io->uv_stride; - dst += buf->stride; - } - return io->mb_h; -} -#endif - -//------------------------------------------------------------------------------ // Fancy upsampling #ifdef FANCY_UPSAMPLING @@ -117,7 +76,7 @@ static int EmitFancyRGB(const VP8Io* const io, WebPDecParams* const p) { if (y == 0) { // First line is special cased. We mirror the u/v samples at boundary. - upsample(NULL, cur_y, cur_u, cur_v, cur_u, cur_v, NULL, dst, mb_w); + upsample(cur_y, NULL, cur_u, cur_v, cur_u, cur_v, dst, NULL, mb_w); } else { // We can finish the left-over line from previous call. upsample(p->tmp_y, cur_y, top_u, top_v, cur_u, cur_v, @@ -160,14 +119,16 @@ static int EmitFancyRGB(const VP8Io* const io, WebPDecParams* const p) { //------------------------------------------------------------------------------ -static int EmitAlphaYUV(const VP8Io* const io, WebPDecParams* const p) { +static int EmitAlphaYUV(const VP8Io* const io, WebPDecParams* const p, + int expected_num_lines_out) { const uint8_t* alpha = io->a; const WebPYUVABuffer* const buf = &p->output->u.YUVA; const int mb_w = io->mb_w; const int mb_h = io->mb_h; uint8_t* dst = buf->a + io->mb_y * buf->a_stride; int j; - + (void)expected_num_lines_out; + assert(expected_num_lines_out == mb_h); if (alpha != NULL) { for (j = 0; j < mb_h; ++j) { memcpy(dst, alpha, mb_w * sizeof(*dst)); @@ -210,7 +171,8 @@ static int GetAlphaSourceRow(const VP8Io* const io, return start_y; } -static int EmitAlphaRGB(const VP8Io* const io, WebPDecParams* const p) { +static int EmitAlphaRGB(const VP8Io* const io, WebPDecParams* const p, + int expected_num_lines_out) { const uint8_t* alpha = io->a; if (alpha != NULL) { const int mb_w = io->mb_w; @@ -221,21 +183,13 @@ static int EmitAlphaRGB(const VP8Io* const io, WebPDecParams* const p) { int num_rows; const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows); uint8_t* const base_rgba = buf->rgba + start_y * buf->stride; - uint8_t* dst = base_rgba + (alpha_first ? 0 : 3); - uint32_t alpha_mask = 0xff; - int i, j; - - for (j = 0; j < num_rows; ++j) { - for (i = 0; i < mb_w; ++i) { - const uint32_t alpha_value = alpha[i]; - dst[4 * i] = alpha_value; - alpha_mask &= alpha_value; - } - alpha += io->width; - dst += buf->stride; - } - // alpha_mask is < 0xff if there's non-trivial alpha to premultiply with. - if (alpha_mask != 0xff && WebPIsPremultipliedMode(colorspace)) { + uint8_t* const dst = base_rgba + (alpha_first ? 0 : 3); + const int has_alpha = WebPDispatchAlpha(alpha, io->width, mb_w, + num_rows, dst, buf->stride); + (void)expected_num_lines_out; + assert(expected_num_lines_out == num_rows); + // has_alpha is true if there's non-trivial alpha to premultiply with. + if (has_alpha && WebPIsPremultipliedMode(colorspace)) { WebPApplyAlphaMultiply(base_rgba, alpha_first, mb_w, num_rows, buf->stride); } @@ -243,7 +197,8 @@ static int EmitAlphaRGB(const VP8Io* const io, WebPDecParams* const p) { return 0; } -static int EmitAlphaRGBA4444(const VP8Io* const io, WebPDecParams* const p) { +static int EmitAlphaRGBA4444(const VP8Io* const io, WebPDecParams* const p, + int expected_num_lines_out) { const uint8_t* alpha = io->a; if (alpha != NULL) { const int mb_w = io->mb_w; @@ -252,10 +207,13 @@ static int EmitAlphaRGBA4444(const VP8Io* const io, WebPDecParams* const p) { int num_rows; const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows); uint8_t* const base_rgba = buf->rgba + start_y * buf->stride; +#ifdef WEBP_SWAP_16BIT_CSP + uint8_t* alpha_dst = base_rgba; +#else uint8_t* alpha_dst = base_rgba + 1; +#endif uint32_t alpha_mask = 0x0f; int i, j; - for (j = 0; j < num_rows; ++j) { for (i = 0; i < mb_w; ++i) { // Fill in the alpha value (converted to 4 bits). @@ -266,6 +224,8 @@ static int EmitAlphaRGBA4444(const VP8Io* const io, WebPDecParams* const p) { alpha += io->width; alpha_dst += buf->stride; } + (void)expected_num_lines_out; + assert(expected_num_lines_out == num_rows); if (alpha_mask != 0x0f && WebPIsPremultipliedMode(colorspace)) { WebPApplyAlphaMultiply4444(base_rgba, mb_w, num_rows, buf->stride); } @@ -291,15 +251,35 @@ static int Rescale(const uint8_t* src, int src_stride, static int EmitRescaledYUV(const VP8Io* const io, WebPDecParams* const p) { const int mb_h = io->mb_h; const int uv_mb_h = (mb_h + 1) >> 1; - const int num_lines_out = Rescale(io->y, io->y_stride, mb_h, &p->scaler_y); + WebPRescaler* const scaler = &p->scaler_y; + int num_lines_out = 0; + if (WebPIsAlphaMode(p->output->colorspace) && io->a != NULL) { + // Before rescaling, we premultiply the luma directly into the io->y + // internal buffer. This is OK since these samples are not used for + // intra-prediction (the top samples are saved in cache_y_/u_/v_). + // But we need to cast the const away, though. + WebPMultRows((uint8_t*)io->y, io->y_stride, + io->a, io->width, io->mb_w, mb_h, 0); + } + num_lines_out = Rescale(io->y, io->y_stride, mb_h, scaler); Rescale(io->u, io->uv_stride, uv_mb_h, &p->scaler_u); Rescale(io->v, io->uv_stride, uv_mb_h, &p->scaler_v); return num_lines_out; } -static int EmitRescaledAlphaYUV(const VP8Io* const io, WebPDecParams* const p) { +static int EmitRescaledAlphaYUV(const VP8Io* const io, WebPDecParams* const p, + int expected_num_lines_out) { if (io->a != NULL) { - Rescale(io->a, io->width, io->mb_h, &p->scaler_a); + const WebPYUVABuffer* const buf = &p->output->u.YUVA; + uint8_t* dst_y = buf->y + p->last_y * buf->y_stride; + const uint8_t* src_a = buf->a + p->last_y * buf->a_stride; + const int num_lines_out = Rescale(io->a, io->width, io->mb_h, &p->scaler_a); + (void)expected_num_lines_out; + assert(expected_num_lines_out == num_lines_out); + if (num_lines_out > 0) { // unmultiply the Y + WebPMultRows(dst_y, buf->y_stride, src_a, buf->a_stride, + p->scaler_a.dst_width, num_lines_out, 1); + } } return 0; } @@ -316,39 +296,34 @@ static int InitYUVRescaler(const VP8Io* const io, WebPDecParams* const p) { const size_t work_size = 2 * out_width; // scratch memory for luma rescaler const size_t uv_work_size = 2 * uv_out_width; // and for each u/v ones size_t tmp_size; - int32_t* work; + rescaler_t* work; - tmp_size = work_size + 2 * uv_work_size; + tmp_size = (work_size + 2 * uv_work_size) * sizeof(*work); if (has_alpha) { - tmp_size += work_size; + tmp_size += work_size * sizeof(*work); } - p->memory = calloc(1, tmp_size * sizeof(*work)); + p->memory = WebPSafeMalloc(1ULL, tmp_size); if (p->memory == NULL) { return 0; // memory error } - work = (int32_t*)p->memory; + work = (rescaler_t*)p->memory; WebPRescalerInit(&p->scaler_y, io->mb_w, io->mb_h, buf->y, out_width, out_height, buf->y_stride, 1, - io->mb_w, out_width, io->mb_h, out_height, work); WebPRescalerInit(&p->scaler_u, uv_in_width, uv_in_height, buf->u, uv_out_width, uv_out_height, buf->u_stride, 1, - uv_in_width, uv_out_width, - uv_in_height, uv_out_height, work + work_size); WebPRescalerInit(&p->scaler_v, uv_in_width, uv_in_height, buf->v, uv_out_width, uv_out_height, buf->v_stride, 1, - uv_in_width, uv_out_width, - uv_in_height, uv_out_height, work + work_size + uv_work_size); p->emit = EmitRescaledYUV; if (has_alpha) { WebPRescalerInit(&p->scaler_a, io->mb_w, io->mb_h, buf->a, out_width, out_height, buf->a_stride, 1, - io->mb_w, out_width, io->mb_h, out_height, work + work_size + 2 * uv_work_size); p->emit_alpha = EmitRescaledAlphaYUV; + WebPInitAlphaProcessing(); } return 1; } @@ -360,13 +335,13 @@ static int ExportRGB(WebPDecParams* const p, int y_pos) { const WebPYUV444Converter convert = WebPYUV444Converters[p->output->colorspace]; const WebPRGBABuffer* const buf = &p->output->u.RGBA; - uint8_t* dst = buf->rgba + (p->last_y + y_pos) * buf->stride; + uint8_t* dst = buf->rgba + y_pos * buf->stride; int num_lines_out = 0; // For RGB rescaling, because of the YUV420, current scan position // U/V can be +1/-1 line from the Y one. Hence the double test. while (WebPRescalerHasPendingOutput(&p->scaler_y) && WebPRescalerHasPendingOutput(&p->scaler_u)) { - assert(p->last_y + y_pos + num_lines_out < p->output->height); + assert(y_pos + num_lines_out < p->output->height); assert(p->scaler_u.y_accum == p->scaler_v.y_accum); WebPRescalerExportRow(&p->scaler_y); WebPRescalerExportRow(&p->scaler_u); @@ -388,65 +363,69 @@ static int EmitRescaledRGB(const VP8Io* const io, WebPDecParams* const p) { const int y_lines_in = WebPRescalerImport(&p->scaler_y, mb_h - j, io->y + j * io->y_stride, io->y_stride); - const int u_lines_in = - WebPRescalerImport(&p->scaler_u, uv_mb_h - uv_j, - io->u + uv_j * io->uv_stride, io->uv_stride); - const int v_lines_in = - WebPRescalerImport(&p->scaler_v, uv_mb_h - uv_j, - io->v + uv_j * io->uv_stride, io->uv_stride); - (void)v_lines_in; // remove a gcc warning - assert(u_lines_in == v_lines_in); j += y_lines_in; - uv_j += u_lines_in; - num_lines_out += ExportRGB(p, num_lines_out); + if (WebPRescaleNeededLines(&p->scaler_u, uv_mb_h - uv_j)) { + const int u_lines_in = + WebPRescalerImport(&p->scaler_u, uv_mb_h - uv_j, + io->u + uv_j * io->uv_stride, io->uv_stride); + const int v_lines_in = + WebPRescalerImport(&p->scaler_v, uv_mb_h - uv_j, + io->v + uv_j * io->uv_stride, io->uv_stride); + (void)v_lines_in; // remove a gcc warning + assert(u_lines_in == v_lines_in); + uv_j += u_lines_in; + } + num_lines_out += ExportRGB(p, p->last_y + num_lines_out); } return num_lines_out; } -static int ExportAlpha(WebPDecParams* const p, int y_pos) { +static int ExportAlpha(WebPDecParams* const p, int y_pos, int max_lines_out) { const WebPRGBABuffer* const buf = &p->output->u.RGBA; - uint8_t* const base_rgba = buf->rgba + (p->last_y + y_pos) * buf->stride; + uint8_t* const base_rgba = buf->rgba + y_pos * buf->stride; const WEBP_CSP_MODE colorspace = p->output->colorspace; const int alpha_first = (colorspace == MODE_ARGB || colorspace == MODE_Argb); uint8_t* dst = base_rgba + (alpha_first ? 0 : 3); int num_lines_out = 0; const int is_premult_alpha = WebPIsPremultipliedMode(colorspace); - uint32_t alpha_mask = 0xff; + uint32_t non_opaque = 0; const int width = p->scaler_a.dst_width; - while (WebPRescalerHasPendingOutput(&p->scaler_a)) { - int i; - assert(p->last_y + y_pos + num_lines_out < p->output->height); + while (WebPRescalerHasPendingOutput(&p->scaler_a) && + num_lines_out < max_lines_out) { + assert(y_pos + num_lines_out < p->output->height); WebPRescalerExportRow(&p->scaler_a); - for (i = 0; i < width; ++i) { - const uint32_t alpha_value = p->scaler_a.dst[i]; - dst[4 * i] = alpha_value; - alpha_mask &= alpha_value; - } + non_opaque |= WebPDispatchAlpha(p->scaler_a.dst, 0, width, 1, dst, 0); dst += buf->stride; ++num_lines_out; } - if (is_premult_alpha && alpha_mask != 0xff) { + if (is_premult_alpha && non_opaque) { WebPApplyAlphaMultiply(base_rgba, alpha_first, width, num_lines_out, buf->stride); } return num_lines_out; } -static int ExportAlphaRGBA4444(WebPDecParams* const p, int y_pos) { +static int ExportAlphaRGBA4444(WebPDecParams* const p, int y_pos, + int max_lines_out) { const WebPRGBABuffer* const buf = &p->output->u.RGBA; - uint8_t* const base_rgba = buf->rgba + (p->last_y + y_pos) * buf->stride; + uint8_t* const base_rgba = buf->rgba + y_pos * buf->stride; +#ifdef WEBP_SWAP_16BIT_CSP + uint8_t* alpha_dst = base_rgba; +#else uint8_t* alpha_dst = base_rgba + 1; +#endif int num_lines_out = 0; const WEBP_CSP_MODE colorspace = p->output->colorspace; const int width = p->scaler_a.dst_width; const int is_premult_alpha = WebPIsPremultipliedMode(colorspace); uint32_t alpha_mask = 0x0f; - while (WebPRescalerHasPendingOutput(&p->scaler_a)) { + while (WebPRescalerHasPendingOutput(&p->scaler_a) && + num_lines_out < max_lines_out) { int i; - assert(p->last_y + y_pos + num_lines_out < p->output->height); + assert(y_pos + num_lines_out < p->output->height); WebPRescalerExportRow(&p->scaler_a); for (i = 0; i < width; ++i) { // Fill in the alpha value (converted to 4 bits). @@ -463,15 +442,17 @@ static int ExportAlphaRGBA4444(WebPDecParams* const p, int y_pos) { return num_lines_out; } -static int EmitRescaledAlphaRGB(const VP8Io* const io, WebPDecParams* const p) { +static int EmitRescaledAlphaRGB(const VP8Io* const io, WebPDecParams* const p, + int expected_num_out_lines) { if (io->a != NULL) { WebPRescaler* const scaler = &p->scaler_a; - int j = 0; - int pos = 0; - while (j < io->mb_h) { - j += WebPRescalerImport(scaler, io->mb_h - j, - io->a + j * io->width, io->width); - pos += p->emit_alpha_row(p, pos); + int lines_left = expected_num_out_lines; + const int y_end = p->last_y + lines_left; + while (lines_left > 0) { + const int row_offset = scaler->src_y - io->mb_y; + WebPRescalerImport(scaler, io->mb_h + io->mb_y - scaler->src_y, + io->a + row_offset * io->width, io->width); + lines_left -= p->emit_alpha_row(p, y_end - lines_left, lines_left); } } return 0; @@ -484,9 +465,9 @@ static int InitRGBRescaler(const VP8Io* const io, WebPDecParams* const p) { const int uv_in_width = (io->mb_w + 1) >> 1; const int uv_in_height = (io->mb_h + 1) >> 1; const size_t work_size = 2 * out_width; // scratch memory for one rescaler - int32_t* work; // rescalers work area + rescaler_t* work; // rescalers work area uint8_t* tmp; // tmp storage for scaled YUV444 samples before RGB conversion - size_t tmp_size1, tmp_size2; + size_t tmp_size1, tmp_size2, total_size; tmp_size1 = 3 * work_size; tmp_size2 = 3 * out_width; @@ -494,30 +475,28 @@ static int InitRGBRescaler(const VP8Io* const io, WebPDecParams* const p) { tmp_size1 += work_size; tmp_size2 += out_width; } - p->memory = calloc(1, tmp_size1 * sizeof(*work) + tmp_size2 * sizeof(*tmp)); + total_size = tmp_size1 * sizeof(*work) + tmp_size2 * sizeof(*tmp); + p->memory = WebPSafeMalloc(1ULL, total_size); if (p->memory == NULL) { return 0; // memory error } - work = (int32_t*)p->memory; + work = (rescaler_t*)p->memory; tmp = (uint8_t*)(work + tmp_size1); WebPRescalerInit(&p->scaler_y, io->mb_w, io->mb_h, tmp + 0 * out_width, out_width, out_height, 0, 1, - io->mb_w, out_width, io->mb_h, out_height, work + 0 * work_size); WebPRescalerInit(&p->scaler_u, uv_in_width, uv_in_height, tmp + 1 * out_width, out_width, out_height, 0, 1, - io->mb_w, 2 * out_width, io->mb_h, 2 * out_height, work + 1 * work_size); WebPRescalerInit(&p->scaler_v, uv_in_width, uv_in_height, tmp + 2 * out_width, out_width, out_height, 0, 1, - io->mb_w, 2 * out_width, io->mb_h, 2 * out_height, work + 2 * work_size); p->emit = EmitRescaledRGB; + WebPInitYUV444Converters(); if (has_alpha) { WebPRescalerInit(&p->scaler_a, io->mb_w, io->mb_h, tmp + 3 * out_width, out_width, out_height, 0, 1, - io->mb_w, out_width, io->mb_h, out_height, work + 3 * work_size); p->emit_alpha = EmitRescaledAlphaRGB; if (p->output->colorspace == MODE_RGBA_4444 || @@ -526,6 +505,7 @@ static int InitRGBRescaler(const VP8Io* const io, WebPDecParams* const p) { } else { p->emit_alpha_row = ExportAlpha; } + WebPInitAlphaProcessing(); } return 1; } @@ -546,7 +526,9 @@ static int CustomSetup(VP8Io* io) { if (!WebPIoInitFromOptions(p->options, io, is_alpha ? MODE_YUV : MODE_YUVA)) { return 0; } - + if (is_alpha && WebPIsPremultipliedMode(colorspace)) { + WebPInitUpsamplers(); + } if (io->use_scaling) { const int ok = is_rgb ? InitRGBRescaler(io, p) : InitYUVRescaler(io, p); if (!ok) { @@ -554,11 +536,12 @@ static int CustomSetup(VP8Io* io) { } } else { if (is_rgb) { + WebPInitSamplers(); p->emit = EmitSampledRGB; // default -#ifdef FANCY_UPSAMPLING if (io->fancy_upsampling) { +#ifdef FANCY_UPSAMPLING const int uv_width = (io->mb_w + 1) >> 1; - p->memory = malloc(io->mb_w + 2 * uv_width); + p->memory = WebPSafeMalloc(1ULL, (size_t)(io->mb_w + 2 * uv_width)); if (p->memory == NULL) { return 0; // memory error. } @@ -567,18 +550,20 @@ static int CustomSetup(VP8Io* io) { p->tmp_v = p->tmp_u + uv_width; p->emit = EmitFancyRGB; WebPInitUpsamplers(); - } #endif + } } else { p->emit = EmitYUV; } if (is_alpha) { // need transparency output - if (WebPIsPremultipliedMode(colorspace)) WebPInitPremultiply(); p->emit_alpha = (colorspace == MODE_RGBA_4444 || colorspace == MODE_rgbA_4444) ? EmitAlphaRGBA4444 : is_rgb ? EmitAlphaRGB : EmitAlphaYUV; + if (is_rgb) { + WebPInitAlphaProcessing(); + } } } @@ -601,8 +586,8 @@ static int CustomPut(const VP8Io* io) { return 0; } num_lines_out = p->emit(io, p); - if (p->emit_alpha) { - p->emit_alpha(io, p); + if (p->emit_alpha != NULL) { + p->emit_alpha(io, p, num_lines_out); } p->last_y += num_lines_out; return 1; @@ -612,7 +597,7 @@ static int CustomPut(const VP8Io* io) { static void CustomTeardown(const VP8Io* io) { WebPDecParams* const p = (WebPDecParams*)io->opaque; - free(p->memory); + WebPSafeFree(p->memory); p->memory = NULL; } @@ -627,7 +612,3 @@ void WebPInitCustomIo(WebPDecParams* const params, VP8Io* const io) { } //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/quant.c b/drivers/webp/dec/quant.c index d54097af0d..5b648f942c 100644 --- a/drivers/webp/dec/quant.c +++ b/drivers/webp/dec/quant.c @@ -1,8 +1,10 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Quantizer initialization @@ -11,10 +13,6 @@ #include "./vp8i.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - static WEBP_INLINE int clip(int v, int M) { return v < 0 ? 0 : v > M ? M : v; } @@ -102,12 +100,11 @@ void VP8ParseQuant(VP8Decoder* const dec) { m->uv_mat_[0] = kDcTable[clip(q + dquv_dc, 117)]; m->uv_mat_[1] = kAcTable[clip(q + dquv_ac, 127)]; + + m->uv_quant_ = q + dquv_ac; // for dithering strength evaluation } } } //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/tree.c b/drivers/webp/dec/tree.c index 82484e4c55..c2007ea733 100644 --- a/drivers/webp/dec/tree.c +++ b/drivers/webp/dec/tree.c @@ -1,22 +1,21 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Coding trees and probas // // Author: Skal (pascal.massimino@gmail.com) -#include "vp8i.h" +#include "./vp8i.h" +#include "../utils/bit_reader_inl.h" #define USE_GENERIC_TREE -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - #ifdef USE_GENERIC_TREE static const int8_t kYModesIntra4[18] = { -B_DC_PRED, 1, @@ -31,61 +30,12 @@ static const int8_t kYModesIntra4[18] = { }; #endif -#ifndef ONLY_KEYFRAME_CODE - -// inter prediction modes -enum { - LEFT4 = 0, ABOVE4 = 1, ZERO4 = 2, NEW4 = 3, - NEARESTMV, NEARMV, ZEROMV, NEWMV, SPLITMV }; - -static const int8_t kYModesInter[8] = { - -DC_PRED, 1, - 2, 3, - -V_PRED, -H_PRED, - -TM_PRED, -B_PRED -}; - -static const int8_t kMBSplit[6] = { - -3, 1, - -2, 2, - -0, -1 -}; - -static const int8_t kMVRef[8] = { - -ZEROMV, 1, - -NEARESTMV, 2, - -NEARMV, 3, - -NEWMV, -SPLITMV -}; - -static const int8_t kMVRef4[6] = { - -LEFT4, 1, - -ABOVE4, 2, - -ZERO4, -NEW4 -}; -#endif - //------------------------------------------------------------------------------ // Default probabilities -// Inter -#ifndef ONLY_KEYFRAME_CODE -static const uint8_t kYModeProbaInter0[4] = { 112, 86, 140, 37 }; -static const uint8_t kUVModeProbaInter0[3] = { 162, 101, 204 }; -static const uint8_t kMVProba0[2][NUM_MV_PROBAS] = { - { 162, 128, 225, 146, 172, 147, 214, 39, - 156, 128, 129, 132, 75, 145, 178, 206, - 239, 254, 254 }, - { 164, 128, 204, 170, 119, 235, 140, 230, - 228, 128, 130, 130, 74, 148, 180, 203, - 236, 254, 254 } -}; -#endif - // Paragraph 13.5 static const uint8_t CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { - // genereated using vp8_default_coef_probs() in entropy.c:129 { { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } @@ -326,28 +276,38 @@ static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = { void VP8ResetProba(VP8Proba* const proba) { memset(proba->segments_, 255u, sizeof(proba->segments_)); - memcpy(proba->coeffs_, CoeffsProba0, sizeof(CoeffsProba0)); -#ifndef ONLY_KEYFRAME_CODE - memcpy(proba->mv_, kMVProba0, sizeof(kMVProba0)); - memcpy(proba->ymode_, kYModeProbaInter0, sizeof(kYModeProbaInter0)); - memcpy(proba->uvmode_, kUVModeProbaInter0, sizeof(kUVModeProbaInter0)); -#endif + // proba->bands_[][] is initialized later } -void VP8ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec) { - uint8_t* const top = dec->intra_t_ + 4 * dec->mb_x_; +static void ParseIntraMode(VP8BitReader* const br, + VP8Decoder* const dec, int mb_x) { + uint8_t* const top = dec->intra_t_ + 4 * mb_x; uint8_t* const left = dec->intra_l_; - // Hardcoded 16x16 intra-mode decision tree. - dec->is_i4x4_ = !VP8GetBit(br, 145); // decide for B_PRED first - if (!dec->is_i4x4_) { + VP8MBData* const block = dec->mb_data_ + mb_x; + + // Note: we don't save segment map (yet), as we don't expect + // to decode more than 1 keyframe. + if (dec->segment_hdr_.update_map_) { + // Hardcoded tree parsing + block->segment_ = !VP8GetBit(br, dec->proba_.segments_[0]) + ? VP8GetBit(br, dec->proba_.segments_[1]) + : 2 + VP8GetBit(br, dec->proba_.segments_[2]); + } else { + block->segment_ = 0; // default for intra + } + if (dec->use_skip_proba_) block->skip_ = VP8GetBit(br, dec->skip_p_); + + block->is_i4x4_ = !VP8GetBit(br, 145); // decide for B_PRED first + if (!block->is_i4x4_) { + // Hardcoded 16x16 intra-mode decision tree. const int ymode = VP8GetBit(br, 156) ? (VP8GetBit(br, 128) ? TM_PRED : H_PRED) : (VP8GetBit(br, 163) ? V_PRED : DC_PRED); - dec->imodes_[0] = ymode; - memset(top, ymode, 4 * sizeof(top[0])); - memset(left, ymode, 4 * sizeof(left[0])); + block->imodes_[0] = ymode; + memset(top, ymode, 4 * sizeof(*top)); + memset(left, ymode, 4 * sizeof(*left)); } else { - uint8_t* modes = dec->imodes_; + uint8_t* modes = block->imodes_; int y; for (y = 0; y < 4; ++y) { int ymode = left[y]; @@ -356,10 +316,10 @@ void VP8ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec) { const uint8_t* const prob = kBModesProba[top[x]][ymode]; #ifdef USE_GENERIC_TREE // Generic tree-parsing - int i = 0; - do { + int i = kYModesIntra4[VP8GetBit(br, prob[0])]; + while (i > 0) { i = kYModesIntra4[2 * i + VP8GetBit(br, prob[i])]; - } while (i > 0); + } ymode = -i; #else // Hardcoded tree parsing @@ -374,15 +334,24 @@ void VP8ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec) { (!VP8GetBit(br, prob[8]) ? B_HD_PRED : B_HU_PRED))); #endif // USE_GENERIC_TREE top[x] = ymode; - *modes++ = ymode; } + memcpy(modes, top, 4 * sizeof(*top)); + modes += 4; left[y] = ymode; } } // Hardcoded UVMode decision tree - dec->uvmode_ = !VP8GetBit(br, 142) ? DC_PRED - : !VP8GetBit(br, 114) ? V_PRED - : VP8GetBit(br, 183) ? TM_PRED : H_PRED; + block->uvmode_ = !VP8GetBit(br, 142) ? DC_PRED + : !VP8GetBit(br, 114) ? V_PRED + : VP8GetBit(br, 183) ? TM_PRED : H_PRED; +} + +int VP8ParseIntraModeRow(VP8BitReader* const br, VP8Decoder* const dec) { + int mb_x; + for (mb_x = 0; mb_x < dec->mb_w_; ++mb_x) { + ParseIntraMode(br, dec, mb_x); + } + return !dec->br_.eof_; } //------------------------------------------------------------------------------ @@ -524,18 +493,13 @@ static const uint8_t } }; -#ifndef ONLY_KEYFRAME_CODE -static const uint8_t MVUpdateProba[2][NUM_MV_PROBAS] = { - { 237, 246, 253, 253, 254, 254, 254, 254, - 254, 254, 254, 254, 254, 254, 250, 250, - 252, 254, 254 }, - { 231, 243, 245, 253, 254, 254, 254, 254, - 254, 254, 254, 254, 254, 254, 251, 251, - 254, 254, 254 } +// Paragraph 9.9 + +static const int kBands[16 + 1] = { + 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, + 0 // extra entry as sentinel }; -#endif -// Paragraph 9.9 void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) { VP8Proba* const proba = &dec->proba_; int t, b, c, p; @@ -543,47 +507,19 @@ void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) { for (b = 0; b < NUM_BANDS; ++b) { for (c = 0; c < NUM_CTX; ++c) { for (p = 0; p < NUM_PROBAS; ++p) { - if (VP8GetBit(br, CoeffsUpdateProba[t][b][c][p])) { - proba->coeffs_[t][b][c][p] = VP8GetValue(br, 8); - } + const int v = VP8GetBit(br, CoeffsUpdateProba[t][b][c][p]) ? + VP8GetValue(br, 8) : CoeffsProba0[t][b][c][p]; + proba->bands_[t][b].probas_[c][p] = v; } } } + for (b = 0; b < 16 + 1; ++b) { + proba->bands_ptr_[t][b] = &proba->bands_[t][kBands[b]]; + } } dec->use_skip_proba_ = VP8Get(br); if (dec->use_skip_proba_) { dec->skip_p_ = VP8GetValue(br, 8); } -#ifndef ONLY_KEYFRAME_CODE - if (!dec->frm_hdr_.key_frame_) { - int i; - dec->intra_p_ = VP8GetValue(br, 8); - dec->last_p_ = VP8GetValue(br, 8); - dec->golden_p_ = VP8GetValue(br, 8); - if (VP8Get(br)) { // update y-mode - for (i = 0; i < 4; ++i) { - proba->ymode_[i] = VP8GetValue(br, 8); - } - } - if (VP8Get(br)) { // update uv-mode - for (i = 0; i < 3; ++i) { - proba->uvmode_[i] = VP8GetValue(br, 8); - } - } - // update MV - for (i = 0; i < 2; ++i) { - int k; - for (k = 0; k < NUM_MV_PROBAS; ++k) { - if (VP8GetBit(br, MVUpdateProba[i][k])) { - const int v = VP8GetValue(br, 7); - proba->mv_[i][k] = v ? v << 1 : 1; - } - } - } - } -#endif } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/vp8.c b/drivers/webp/dec/vp8.c index b0ccfa2a06..d89eb1c59e 100644 --- a/drivers/webp/dec/vp8.c +++ b/drivers/webp/dec/vp8.c @@ -1,8 +1,10 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // main entry for the decoder @@ -11,14 +13,12 @@ #include <stdlib.h> +#include "./alphai.h" #include "./vp8i.h" #include "./vp8li.h" #include "./webpi.h" -#include "../utils/bit_reader.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "../utils/bit_reader_inl.h" +#include "../utils/utils.h" //------------------------------------------------------------------------------ @@ -45,10 +45,10 @@ int VP8InitIoInternal(VP8Io* const io, int version) { } VP8Decoder* VP8New(void) { - VP8Decoder* const dec = (VP8Decoder*)calloc(1, sizeof(*dec)); + VP8Decoder* const dec = (VP8Decoder*)WebPSafeCalloc(1ULL, sizeof(*dec)); if (dec != NULL) { SetOk(dec); - WebPWorkerInit(&dec->worker_); + WebPGetWorkerInterface()->Init(&dec->worker_); dec->ready_ = 0; dec->num_parts_ = 1; } @@ -69,16 +69,13 @@ const char* VP8StatusMessage(VP8Decoder* const dec) { void VP8Delete(VP8Decoder* const dec) { if (dec != NULL) { VP8Clear(dec); - free(dec); + WebPSafeFree(dec); } } int VP8SetError(VP8Decoder* const dec, VP8StatusCode error, const char* const msg) { - // TODO This check would be unnecessary if alpha decompression was separated - // from VP8ProcessRow/FinishRow. This avoids setting 'dec->status_' to - // something other than VP8_STATUS_BITSTREAM_ERROR on alpha decompression - // failure. + // The oldest error reported takes precedence over the new one. if (dec->status_ == VP8_STATUS_OK) { dec->status_ = error; dec->error_msg_ = msg; @@ -121,6 +118,9 @@ int VP8GetInfo(const uint8_t* data, size_t data_size, size_t chunk_size, if (((bits >> 5)) >= chunk_size) { // partition_length return 0; // inconsistent size information. } + if (w == 0 || h == 0) { + return 0; // We don't support both width and height to be zero. + } if (width) { *width = w; @@ -190,25 +190,27 @@ static VP8StatusCode ParsePartitions(VP8Decoder* const dec, const uint8_t* sz = buf; const uint8_t* buf_end = buf + size; const uint8_t* part_start; - int last_part; - int p; + size_t size_left = size; + size_t last_part; + size_t p; dec->num_parts_ = 1 << VP8GetValue(br, 2); last_part = dec->num_parts_ - 1; - part_start = buf + last_part * 3; - if (buf_end < part_start) { + if (size < 3 * last_part) { // we can't even read the sizes with sz[]! That's a failure. return VP8_STATUS_NOT_ENOUGH_DATA; } + part_start = buf + last_part * 3; + size_left -= last_part * 3; for (p = 0; p < last_part; ++p) { - const uint32_t psize = sz[0] | (sz[1] << 8) | (sz[2] << 16); - const uint8_t* part_end = part_start + psize; - if (part_end > buf_end) part_end = buf_end; - VP8InitBitReader(dec->parts_ + p, part_start, part_end); - part_start = part_end; + size_t psize = sz[0] | (sz[1] << 8) | (sz[2] << 16); + if (psize > size_left) psize = size_left; + VP8InitBitReader(dec->parts_ + p, part_start, psize); + part_start += psize; + size_left -= psize; sz += 3; } - VP8InitBitReader(dec->parts_ + last_part, part_start, buf_end); + VP8InitBitReader(dec->parts_ + last_part, part_start, size_left); return (part_start < buf_end) ? VP8_STATUS_OK : VP8_STATUS_SUSPENDED; // Init is ok, but there's not enough data } @@ -236,20 +238,6 @@ static int ParseFilterHeader(VP8BitReader* br, VP8Decoder* const dec) { } } dec->filter_type_ = (hdr->level_ == 0) ? 0 : hdr->simple_ ? 1 : 2; - if (dec->filter_type_ > 0) { // precompute filter levels per segment - if (dec->segment_hdr_.use_segment_) { - int s; - for (s = 0; s < NUM_MB_SEGMENTS; ++s) { - int strength = dec->segment_hdr_.filter_strength_[s]; - if (!dec->segment_hdr_.absolute_delta_) { - strength += hdr->level_; - } - dec->filter_levels_[s] = strength; - } - } else { - dec->filter_levels_[0] = hdr->level_; - } - } return !br->eof_; } @@ -261,7 +249,6 @@ int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io) { VP8PictureHeader* pic_hdr; VP8BitReader* br; VP8StatusCode status; - WebPHeaderStructure headers; if (dec == NULL) { return 0; @@ -271,33 +258,8 @@ int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io) { return VP8SetError(dec, VP8_STATUS_INVALID_PARAM, "null VP8Io passed to VP8GetHeaders()"); } - - // Process Pre-VP8 chunks. - headers.data = io->data; - headers.data_size = io->data_size; - status = WebPParseHeaders(&headers); - if (status != VP8_STATUS_OK) { - return VP8SetError(dec, status, "Incorrect/incomplete header."); - } - if (headers.is_lossless) { - return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, - "Unexpected lossless format encountered."); - } - - if (dec->alpha_data_ == NULL) { - assert(dec->alpha_data_size_ == 0); - // We have NOT set alpha data yet. Set it now. - // (This is to ensure that dec->alpha_data_ is NOT reset to NULL if - // WebPParseHeaders() is called more than once, as in incremental decoding - // case.) - dec->alpha_data_ = headers.alpha_data; - dec->alpha_data_size_ = headers.alpha_data_size; - } - - // Process the VP8 frame header. - buf = headers.data + headers.offset; - buf_size = headers.data_size - headers.offset; - assert(headers.data_size >= headers.offset); // WebPParseHeaders' guarantee + buf = io->data; + buf_size = io->data_size; if (buf_size < 4) { return VP8SetError(dec, VP8_STATUS_NOT_ENOUGH_DATA, "Truncated header."); @@ -355,7 +317,6 @@ int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io) { VP8ResetProba(&dec->proba_); ResetSegmentHeader(&dec->segment_hdr_); - dec->segment_ = 0; // default for intra } // Check if we have all the partition #0 available, and initialize dec->br_ @@ -366,7 +327,7 @@ int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io) { } br = &dec->br_; - VP8InitBitReader(br, buf, buf + frm_hdr->partition_length_); + VP8InitBitReader(br, buf, frm_hdr->partition_length_); buf += frm_hdr->partition_length_; buf_size -= frm_hdr->partition_length_; @@ -393,63 +354,14 @@ int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io) { // Frame buffer marking if (!frm_hdr->key_frame_) { - // Paragraph 9.7 -#ifndef ONLY_KEYFRAME_CODE - dec->buffer_flags_ = VP8Get(br) << 0; // update golden - dec->buffer_flags_ |= VP8Get(br) << 1; // update alt ref - if (!(dec->buffer_flags_ & 1)) { - dec->buffer_flags_ |= VP8GetValue(br, 2) << 2; - } - if (!(dec->buffer_flags_ & 2)) { - dec->buffer_flags_ |= VP8GetValue(br, 2) << 4; - } - dec->buffer_flags_ |= VP8Get(br) << 6; // sign bias golden - dec->buffer_flags_ |= VP8Get(br) << 7; // sign bias alt ref -#else return VP8SetError(dec, VP8_STATUS_UNSUPPORTED_FEATURE, "Not a key frame."); -#endif - } else { - dec->buffer_flags_ = 0x003 | 0x100; } - // Paragraph 9.8 -#ifndef ONLY_KEYFRAME_CODE - dec->update_proba_ = VP8Get(br); - if (!dec->update_proba_) { // save for later restore - dec->proba_saved_ = dec->proba_; - } - dec->buffer_flags_ &= 1 << 8; - dec->buffer_flags_ |= - (frm_hdr->key_frame_ || VP8Get(br)) << 8; // refresh last frame -#else - VP8Get(br); // just ignore the value of update_proba_ -#endif + VP8Get(br); // ignore the value of update_proba_ VP8ParseProba(br, dec); -#ifdef WEBP_EXPERIMENTAL_FEATURES - // Extensions - if (dec->pic_hdr_.colorspace_) { - const size_t kTrailerSize = 8; - const uint8_t kTrailerMarker = 0x01; - const uint8_t* ext_buf = buf - kTrailerSize; - size_t size; - - if (frm_hdr->partition_length_ < kTrailerSize || - ext_buf[kTrailerSize - 1] != kTrailerMarker) { - return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, - "RIFF: Inconsistent extra information."); - } - - // Layer - size = (ext_buf[0] << 0) | (ext_buf[1] << 8) | (ext_buf[2] << 16); - dec->layer_data_size_ = size; - dec->layer_data_ = NULL; // will be set later - dec->layer_colorspace_ = ext_buf[3]; - } -#endif - // sanitized state dec->ready_ = 1; return 1; @@ -458,11 +370,6 @@ int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io) { //------------------------------------------------------------------------------ // Residual decoding (Paragraph 13.2 / 13.3) -static const uint8_t kBands[16 + 1] = { - 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, - 0 // extra entry as sentinel -}; - static const uint8_t kCat3[] = { 173, 148, 140, 0 }; static const uint8_t kCat4[] = { 176, 155, 140, 135, 0 }; static const uint8_t kCat5[] = { 180, 157, 141, 134, 130, 0 }; @@ -473,253 +380,226 @@ static const uint8_t kZigzag[16] = { 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 }; -typedef const uint8_t (*ProbaArray)[NUM_CTX][NUM_PROBAS]; // for const-casting +// See section 13-2: http://tools.ietf.org/html/rfc6386#section-13.2 +static int GetLargeValue(VP8BitReader* const br, const uint8_t* const p) { + int v; + if (!VP8GetBit(br, p[3])) { + if (!VP8GetBit(br, p[4])) { + v = 2; + } else { + v = 3 + VP8GetBit(br, p[5]); + } + } else { + if (!VP8GetBit(br, p[6])) { + if (!VP8GetBit(br, p[7])) { + v = 5 + VP8GetBit(br, 159); + } else { + v = 7 + 2 * VP8GetBit(br, 165); + v += VP8GetBit(br, 145); + } + } else { + const uint8_t* tab; + const int bit1 = VP8GetBit(br, p[8]); + const int bit0 = VP8GetBit(br, p[9 + bit1]); + const int cat = 2 * bit1 + bit0; + v = 0; + for (tab = kCat3456[cat]; *tab; ++tab) { + v += v + VP8GetBit(br, *tab); + } + v += 3 + (8 << cat); + } + } + return v; +} // Returns the position of the last non-zero coeff plus one -// (and 0 if there's no coeff at all) -static int GetCoeffs(VP8BitReader* const br, ProbaArray prob, +static int GetCoeffs(VP8BitReader* const br, const VP8BandProbas* const prob[], int ctx, const quant_t dq, int n, int16_t* out) { - // n is either 0 or 1 here. kBands[n] is not necessary for extracting '*p'. - const uint8_t* p = prob[n][ctx]; - if (!VP8GetBit(br, p[0])) { // first EOB is more a 'CBP' bit. - return 0; - } - while (1) { - ++n; - if (!VP8GetBit(br, p[1])) { - p = prob[kBands[n]][0]; - } else { // non zero coeff - int v, j; + const uint8_t* p = prob[n]->probas_[ctx]; + for (; n < 16; ++n) { + if (!VP8GetBit(br, p[0])) { + return n; // previous coeff was last non-zero coeff + } + while (!VP8GetBit(br, p[1])) { // sequence of zero coeffs + p = prob[++n]->probas_[0]; + if (n == 16) return 16; + } + { // non zero coeff + const VP8ProbaArray* const p_ctx = &prob[n + 1]->probas_[0]; + int v; if (!VP8GetBit(br, p[2])) { - p = prob[kBands[n]][1]; v = 1; + p = p_ctx[1]; } else { - if (!VP8GetBit(br, p[3])) { - if (!VP8GetBit(br, p[4])) { - v = 2; - } else { - v = 3 + VP8GetBit(br, p[5]); - } - } else { - if (!VP8GetBit(br, p[6])) { - if (!VP8GetBit(br, p[7])) { - v = 5 + VP8GetBit(br, 159); - } else { - v = 7 + 2 * VP8GetBit(br, 165); - v += VP8GetBit(br, 145); - } - } else { - const uint8_t* tab; - const int bit1 = VP8GetBit(br, p[8]); - const int bit0 = VP8GetBit(br, p[9 + bit1]); - const int cat = 2 * bit1 + bit0; - v = 0; - for (tab = kCat3456[cat]; *tab; ++tab) { - v += v + VP8GetBit(br, *tab); - } - v += 3 + (8 << cat); - } - } - p = prob[kBands[n]][2]; + v = GetLargeValue(br, p); + p = p_ctx[2]; } - j = kZigzag[n - 1]; - out[j] = VP8GetSigned(br, v) * dq[j > 0]; - if (n == 16 || !VP8GetBit(br, p[0])) { // EOB - return n; - } - } - if (n == 16) { - return 16; + out[kZigzag[n]] = VP8GetSigned(br, v) * dq[n > 0]; } } + return 16; } -// Alias-safe way of converting 4bytes to 32bits. -typedef union { - uint8_t i8[4]; - uint32_t i32; -} PackedNz; - -// Table to unpack four bits into four bytes -static const PackedNz kUnpackTab[16] = { - {{0, 0, 0, 0}}, {{1, 0, 0, 0}}, {{0, 1, 0, 0}}, {{1, 1, 0, 0}}, - {{0, 0, 1, 0}}, {{1, 0, 1, 0}}, {{0, 1, 1, 0}}, {{1, 1, 1, 0}}, - {{0, 0, 0, 1}}, {{1, 0, 0, 1}}, {{0, 1, 0, 1}}, {{1, 1, 0, 1}}, - {{0, 0, 1, 1}}, {{1, 0, 1, 1}}, {{0, 1, 1, 1}}, {{1, 1, 1, 1}} }; - -// Macro to pack four LSB of four bytes into four bits. -#if defined(__PPC__) || defined(_M_PPC) || defined(_ARCH_PPC) || \ - defined(__BIG_ENDIAN__) -#define PACK_CST 0x08040201U -#else -#define PACK_CST 0x01020408U -#endif -#define PACK(X, S) ((((X).i32 * PACK_CST) & 0xff000000) >> (S)) - -static void ParseResiduals(VP8Decoder* const dec, - VP8MB* const mb, VP8BitReader* const token_br) { - int out_t_nz, out_l_nz, first; - ProbaArray ac_prob; - const VP8QuantMatrix* q = &dec->dqm_[dec->segment_]; - int16_t* dst = dec->coeffs_; +static WEBP_INLINE uint32_t NzCodeBits(uint32_t nz_coeffs, int nz, int dc_nz) { + nz_coeffs <<= 2; + nz_coeffs |= (nz > 3) ? 3 : (nz > 1) ? 2 : dc_nz; + return nz_coeffs; +} + +static int ParseResiduals(VP8Decoder* const dec, + VP8MB* const mb, VP8BitReader* const token_br) { + const VP8BandProbas* (* const bands)[16 + 1] = dec->proba_.bands_ptr_; + const VP8BandProbas* const * ac_proba; + VP8MBData* const block = dec->mb_data_ + dec->mb_x_; + const VP8QuantMatrix* const q = &dec->dqm_[block->segment_]; + int16_t* dst = block->coeffs_; VP8MB* const left_mb = dec->mb_info_ - 1; - PackedNz nz_ac, nz_dc; - PackedNz tnz, lnz; - uint32_t non_zero_ac = 0; - uint32_t non_zero_dc = 0; + uint8_t tnz, lnz; + uint32_t non_zero_y = 0; + uint32_t non_zero_uv = 0; int x, y, ch; + uint32_t out_t_nz, out_l_nz; + int first; - nz_dc.i32 = nz_ac.i32 = 0; memset(dst, 0, 384 * sizeof(*dst)); - if (!dec->is_i4x4_) { // parse DC + if (!block->is_i4x4_) { // parse DC int16_t dc[16] = { 0 }; - const int ctx = mb->dc_nz_ + left_mb->dc_nz_; - mb->dc_nz_ = left_mb->dc_nz_ = - (GetCoeffs(token_br, (ProbaArray)dec->proba_.coeffs_[1], - ctx, q->y2_mat_, 0, dc) > 0); + const int ctx = mb->nz_dc_ + left_mb->nz_dc_; + const int nz = GetCoeffs(token_br, bands[1], ctx, q->y2_mat_, 0, dc); + mb->nz_dc_ = left_mb->nz_dc_ = (nz > 0); + if (nz > 1) { // more than just the DC -> perform the full transform + VP8TransformWHT(dc, dst); + } else { // only DC is non-zero -> inlined simplified transform + int i; + const int dc0 = (dc[0] + 3) >> 3; + for (i = 0; i < 16 * 16; i += 16) dst[i] = dc0; + } first = 1; - ac_prob = (ProbaArray)dec->proba_.coeffs_[0]; - VP8TransformWHT(dc, dst); + ac_proba = bands[0]; } else { first = 0; - ac_prob = (ProbaArray)dec->proba_.coeffs_[3]; + ac_proba = bands[3]; } - tnz = kUnpackTab[mb->nz_ & 0xf]; - lnz = kUnpackTab[left_mb->nz_ & 0xf]; + tnz = mb->nz_ & 0x0f; + lnz = left_mb->nz_ & 0x0f; for (y = 0; y < 4; ++y) { - int l = lnz.i8[y]; + int l = lnz & 1; + uint32_t nz_coeffs = 0; for (x = 0; x < 4; ++x) { - const int ctx = l + tnz.i8[x]; - const int nz = GetCoeffs(token_br, ac_prob, ctx, - q->y1_mat_, first, dst); - tnz.i8[x] = l = (nz > 0); - nz_dc.i8[x] = (dst[0] != 0); - nz_ac.i8[x] = (nz > 1); + const int ctx = l + (tnz & 1); + const int nz = GetCoeffs(token_br, ac_proba, ctx, q->y1_mat_, first, dst); + l = (nz > first); + tnz = (tnz >> 1) | (l << 7); + nz_coeffs = NzCodeBits(nz_coeffs, nz, dst[0] != 0); dst += 16; } - lnz.i8[y] = l; - non_zero_dc |= PACK(nz_dc, 24 - y * 4); - non_zero_ac |= PACK(nz_ac, 24 - y * 4); + tnz >>= 4; + lnz = (lnz >> 1) | (l << 7); + non_zero_y = (non_zero_y << 8) | nz_coeffs; } - out_t_nz = PACK(tnz, 24); - out_l_nz = PACK(lnz, 24); + out_t_nz = tnz; + out_l_nz = lnz >> 4; - tnz = kUnpackTab[mb->nz_ >> 4]; - lnz = kUnpackTab[left_mb->nz_ >> 4]; for (ch = 0; ch < 4; ch += 2) { + uint32_t nz_coeffs = 0; + tnz = mb->nz_ >> (4 + ch); + lnz = left_mb->nz_ >> (4 + ch); for (y = 0; y < 2; ++y) { - int l = lnz.i8[ch + y]; + int l = lnz & 1; for (x = 0; x < 2; ++x) { - const int ctx = l + tnz.i8[ch + x]; - const int nz = - GetCoeffs(token_br, (ProbaArray)dec->proba_.coeffs_[2], - ctx, q->uv_mat_, 0, dst); - tnz.i8[ch + x] = l = (nz > 0); - nz_dc.i8[y * 2 + x] = (dst[0] != 0); - nz_ac.i8[y * 2 + x] = (nz > 1); + const int ctx = l + (tnz & 1); + const int nz = GetCoeffs(token_br, bands[2], ctx, q->uv_mat_, 0, dst); + l = (nz > 0); + tnz = (tnz >> 1) | (l << 3); + nz_coeffs = NzCodeBits(nz_coeffs, nz, dst[0] != 0); dst += 16; } - lnz.i8[ch + y] = l; + tnz >>= 2; + lnz = (lnz >> 1) | (l << 5); } - non_zero_dc |= PACK(nz_dc, 8 - ch * 2); - non_zero_ac |= PACK(nz_ac, 8 - ch * 2); + // Note: we don't really need the per-4x4 details for U/V blocks. + non_zero_uv |= nz_coeffs << (4 * ch); + out_t_nz |= (tnz << 4) << ch; + out_l_nz |= (lnz & 0xf0) << ch; } - out_t_nz |= PACK(tnz, 20); - out_l_nz |= PACK(lnz, 20); mb->nz_ = out_t_nz; left_mb->nz_ = out_l_nz; - dec->non_zero_ac_ = non_zero_ac; - dec->non_zero_ = non_zero_ac | non_zero_dc; - mb->skip_ = !dec->non_zero_; + block->non_zero_y_ = non_zero_y; + block->non_zero_uv_ = non_zero_uv; + + // We look at the mode-code of each block and check if some blocks have less + // than three non-zero coeffs (code < 2). This is to avoid dithering flat and + // empty blocks. + block->dither_ = (non_zero_uv & 0xaaaa) ? 0 : q->dither_; + + return !(non_zero_y | non_zero_uv); // will be used for further optimization } -#undef PACK //------------------------------------------------------------------------------ // Main loop int VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br) { - VP8BitReader* const br = &dec->br_; VP8MB* const left = dec->mb_info_ - 1; - VP8MB* const info = dec->mb_info_ + dec->mb_x_; - - // Note: we don't save segment map (yet), as we don't expect - // to decode more than 1 keyframe. - if (dec->segment_hdr_.update_map_) { - // Hardcoded tree parsing - dec->segment_ = !VP8GetBit(br, dec->proba_.segments_[0]) ? - VP8GetBit(br, dec->proba_.segments_[1]) : - 2 + VP8GetBit(br, dec->proba_.segments_[2]); - } - info->skip_ = dec->use_skip_proba_ ? VP8GetBit(br, dec->skip_p_) : 0; + VP8MB* const mb = dec->mb_info_ + dec->mb_x_; + VP8MBData* const block = dec->mb_data_ + dec->mb_x_; + int skip = dec->use_skip_proba_ ? block->skip_ : 0; - VP8ParseIntraMode(br, dec); - if (br->eof_) { - return 0; - } - - if (!info->skip_) { - ParseResiduals(dec, info, token_br); + if (!skip) { + skip = ParseResiduals(dec, mb, token_br); } else { - left->nz_ = info->nz_ = 0; - if (!dec->is_i4x4_) { - left->dc_nz_ = info->dc_nz_ = 0; + left->nz_ = mb->nz_ = 0; + if (!block->is_i4x4_) { + left->nz_dc_ = mb->nz_dc_ = 0; } - dec->non_zero_ = 0; - dec->non_zero_ac_ = 0; + block->non_zero_y_ = 0; + block->non_zero_uv_ = 0; + block->dither_ = 0; + } + + if (dec->filter_type_ > 0) { // store filter info + VP8FInfo* const finfo = dec->f_info_ + dec->mb_x_; + *finfo = dec->fstrengths_[block->segment_][block->is_i4x4_]; + finfo->f_inner_ |= !skip; } - return (!token_br->eof_); + return !token_br->eof_; } void VP8InitScanline(VP8Decoder* const dec) { VP8MB* const left = dec->mb_info_ - 1; left->nz_ = 0; - left->dc_nz_ = 0; + left->nz_dc_ = 0; memset(dec->intra_l_, B_DC_PRED, sizeof(dec->intra_l_)); - dec->filter_row_ = - (dec->filter_type_ > 0) && - (dec->mb_y_ >= dec->tl_mb_y_) && (dec->mb_y_ <= dec->br_mb_y_); + dec->mb_x_ = 0; } static int ParseFrame(VP8Decoder* const dec, VP8Io* io) { for (dec->mb_y_ = 0; dec->mb_y_ < dec->br_mb_y_; ++dec->mb_y_) { + // Parse bitstream for this row. VP8BitReader* const token_br = &dec->parts_[dec->mb_y_ & (dec->num_parts_ - 1)]; - VP8InitScanline(dec); - for (dec->mb_x_ = 0; dec->mb_x_ < dec->mb_w_; dec->mb_x_++) { + if (!VP8ParseIntraModeRow(&dec->br_, dec)) { + return VP8SetError(dec, VP8_STATUS_NOT_ENOUGH_DATA, + "Premature end-of-partition0 encountered."); + } + for (; dec->mb_x_ < dec->mb_w_; ++dec->mb_x_) { if (!VP8DecodeMB(dec, token_br)) { return VP8SetError(dec, VP8_STATUS_NOT_ENOUGH_DATA, "Premature end-of-file encountered."); } - VP8ReconstructBlock(dec); - - // Store data and save block's filtering params - VP8StoreBlock(dec); } + VP8InitScanline(dec); // Prepare for next scanline + + // Reconstruct, filter and emit the row. if (!VP8ProcessRow(dec, io)) { return VP8SetError(dec, VP8_STATUS_USER_ABORT, "Output aborted."); } } - if (dec->use_threads_ && !WebPWorkerSync(&dec->worker_)) { - return 0; - } - - // Finish -#ifndef ONLY_KEYFRAME_CODE - if (!dec->update_proba_) { - dec->proba_ = dec->proba_saved_; + if (dec->mt_method_ > 0) { + if (!WebPGetWorkerInterface()->Sync(&dec->worker_)) return 0; } -#endif - -#ifdef WEBP_EXPERIMENTAL_FEATURES - if (dec->layer_data_size_ > 0) { - if (!VP8DecodeLayer(dec)) { - return 0; - } - } -#endif return 1; } @@ -768,12 +648,10 @@ void VP8Clear(VP8Decoder* const dec) { if (dec == NULL) { return; } - if (dec->use_threads_) { - WebPWorkerEnd(&dec->worker_); - } - if (dec->mem_) { - free(dec->mem_); - } + WebPGetWorkerInterface()->End(&dec->worker_); + ALPHDelete(dec->alph_dec_); + dec->alph_dec_ = NULL; + WebPSafeFree(dec->mem_); dec->mem_ = NULL; dec->mem_size_ = 0; memset(&dec->br_, 0, sizeof(dec->br_)); @@ -782,6 +660,3 @@ void VP8Clear(VP8Decoder* const dec) { //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/vp8i.h b/drivers/webp/dec/vp8i.h index 4382edfd8e..b5f2b23009 100644 --- a/drivers/webp/dec/vp8i.h +++ b/drivers/webp/dec/vp8i.h @@ -1,8 +1,10 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // VP8 decoder: internal header. @@ -13,12 +15,14 @@ #define WEBP_DEC_VP8I_H_ #include <string.h> // for memcpy() +#include "./common.h" #include "./vp8li.h" #include "../utils/bit_reader.h" +#include "../utils/random.h" #include "../utils/thread.h" #include "../dsp/dsp.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -27,48 +31,10 @@ extern "C" { // version numbers #define DEC_MAJ_VERSION 0 -#define DEC_MIN_VERSION 2 -#define DEC_REV_VERSION 0 - -#define ONLY_KEYFRAME_CODE // to remove any code related to P-Frames - -// intra prediction modes -enum { B_DC_PRED = 0, // 4x4 modes - B_TM_PRED, - B_VE_PRED, - B_HE_PRED, - B_RD_PRED, - B_VR_PRED, - B_LD_PRED, - B_VL_PRED, - B_HD_PRED, - B_HU_PRED, - NUM_BMODES = B_HU_PRED + 1 - B_DC_PRED, // = 10 - - // Luma16 or UV modes - DC_PRED = B_DC_PRED, V_PRED = B_VE_PRED, - H_PRED = B_HE_PRED, TM_PRED = B_TM_PRED, - B_PRED = NUM_BMODES, // refined I4x4 mode - - // special modes - B_DC_PRED_NOTOP = 4, - B_DC_PRED_NOLEFT = 5, - B_DC_PRED_NOTOPLEFT = 6, - NUM_B_DC_MODES = 7 }; - -enum { MB_FEATURE_TREE_PROBS = 3, - NUM_MB_SEGMENTS = 4, - NUM_REF_LF_DELTAS = 4, - NUM_MODE_LF_DELTAS = 4, // I4x4, ZERO, *, SPLIT - MAX_NUM_PARTITIONS = 8, - // Probabilities - NUM_TYPES = 4, - NUM_BANDS = 8, - NUM_CTX = 3, - NUM_PROBAS = 11, - NUM_MV_PROBAS = 19 }; - -// YUV-cache parameters. +#define DEC_MIN_VERSION 4 +#define DEC_REV_VERSION 4 + +// YUV-cache parameters. Cache is 32-bytes wide (= one cacheline). // Constraints are: We need to store one 16x16 block of luma samples (y), // and two 8x8 chroma blocks (u/v). These are better be 16-bytes aligned, // in order to be SIMD-friendly. We also need to store the top, left and @@ -90,14 +56,15 @@ enum { MB_FEATURE_TREE_PROBS = 3, // 'y' = y-samples 'u' = u-samples 'v' = u-samples // '|' = left sample, '-' = top sample, '+' = top-left sample // 't' = extra top-right sample for 4x4 modes -// With this layout, BPS (=Bytes Per Scan-line) is one cacheline size. -#define BPS 32 // this is the common stride used by yuv[] #define YUV_SIZE (BPS * 17 + BPS * 9) #define Y_SIZE (BPS * 17) #define Y_OFF (BPS * 1 + 8) #define U_OFF (Y_OFF + BPS * 16 + BPS) #define V_OFF (U_OFF + 16) +// minimal width under which lossy multi-threading is always disabled +#define MIN_WIDTH_FOR_THREADS 512 + //------------------------------------------------------------------------------ // Headers @@ -126,15 +93,19 @@ typedef struct { int8_t filter_strength_[NUM_MB_SEGMENTS]; // filter strength for segments } VP8SegmentHeader; +// probas associated to one of the contexts +typedef uint8_t VP8ProbaArray[NUM_PROBAS]; + +typedef struct { // all the probas associated to one band + VP8ProbaArray probas_[NUM_CTX]; +} VP8BandProbas; + // Struct collecting all frame-persistent probabilities. typedef struct { uint8_t segments_[MB_FEATURE_TREE_PROBS]; // Type: 0:Intra16-AC 1:Intra16-DC 2:Chroma 3:Intra4 - uint8_t coeffs_[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS]; -#ifndef ONLY_KEYFRAME_CODE - uint8_t ymode_[4], uvmode_[3]; - uint8_t mv_[2][NUM_MV_PROBAS]; -#endif + VP8BandProbas bands_[NUM_TYPES][NUM_BANDS]; + const VP8BandProbas* bands_ptr_[NUM_TYPES][16 + 1]; } VP8Proba; // Filter parameters @@ -151,32 +122,61 @@ typedef struct { // Informations about the macroblocks. typedef struct { // filter specs - unsigned int f_level_:6; // filter strength: 0..63 - unsigned int f_ilevel_:6; // inner limit: 1..63 - unsigned int f_inner_:1; // do inner filtering? + uint8_t f_limit_; // filter limit in [3..189], or 0 if no filtering + uint8_t f_ilevel_; // inner limit in [1..63] + uint8_t f_inner_; // do inner filtering? + uint8_t hev_thresh_; // high edge variance threshold in [0..2] } VP8FInfo; -typedef struct { // used for syntax-parsing - unsigned int nz_; // non-zero AC/DC coeffs - unsigned int dc_nz_:1; // non-zero DC coeffs - unsigned int skip_:1; // block type +typedef struct { // Top/Left Contexts used for syntax-parsing + uint8_t nz_; // non-zero AC/DC coeffs (4bit for luma + 4bit for chroma) + uint8_t nz_dc_; // non-zero DC coeff (1bit) } VP8MB; // Dequantization matrices typedef int quant_t[2]; // [DC / AC]. Can be 'uint16_t[2]' too (~slower). typedef struct { quant_t y1_mat_, y2_mat_, uv_mat_; + + int uv_quant_; // U/V quantizer value + int dither_; // dithering amplitude (0 = off, max=255) } VP8QuantMatrix; +// Data needed to reconstruct a macroblock +typedef struct { + int16_t coeffs_[384]; // 384 coeffs = (16+4+4) * 4*4 + uint8_t is_i4x4_; // true if intra4x4 + uint8_t imodes_[16]; // one 16x16 mode (#0) or sixteen 4x4 modes + uint8_t uvmode_; // chroma prediction mode + // bit-wise info about the content of each sub-4x4 blocks (in decoding order). + // Each of the 4x4 blocks for y/u/v is associated with a 2b code according to: + // code=0 -> no coefficient + // code=1 -> only DC + // code=2 -> first three coefficients are non-zero + // code=3 -> more than three coefficients are non-zero + // This allows to call specialized transform functions. + uint32_t non_zero_y_; + uint32_t non_zero_uv_; + uint8_t dither_; // local dithering strength (deduced from non_zero_*) + uint8_t skip_; + uint8_t segment_; +} VP8MBData; + // Persistent information needed by the parallel processing typedef struct { - int id_; // cache row to process (in [0..2]) - int mb_y_; // macroblock position of the row - int filter_row_; // true if row-filtering is needed - VP8FInfo* f_info_; // filter strengths - VP8Io io_; // copy of the VP8Io to pass to put() + int id_; // cache row to process (in [0..2]) + int mb_y_; // macroblock position of the row + int filter_row_; // true if row-filtering is needed + VP8FInfo* f_info_; // filter strengths (swapped with dec->f_info_) + VP8MBData* mb_data_; // reconstruction data (swapped with dec->mb_data_) + VP8Io io_; // copy of the VP8Io to pass to put() } VP8ThreadContext; +// Saved top samples, per macroblock. Fits into a cache-line. +typedef struct { + uint8_t y[16], u[8], v[8]; +} VP8TopSamples; + //------------------------------------------------------------------------------ // VP8Decoder: the main opaque structure handed over to user @@ -196,7 +196,8 @@ struct VP8Decoder { // Worker WebPWorker worker_; - int use_threads_; // use multi-thread + int mt_method_; // multi-thread method: 0=off, 1=[parse+recon][filter] + // 2=[parse][recon+filter] int cache_id_; // current cache row int num_caches_; // number of cached rows of 16 pixels (1, 2 or 3) VP8ThreadContext thread_ctx_; // Thread context @@ -213,12 +214,9 @@ struct VP8Decoder { // per-partition boolean decoders. VP8BitReader parts_[MAX_NUM_PARTITIONS]; - // buffer refresh flags - // bit 0: refresh Gold, bit 1: refresh Alt - // bit 2-3: copy to Gold, bit 4-5: copy to Alt - // bit 6: Gold sign bias, bit 7: Alt sign bias - // bit 8: refresh last frame - uint32_t buffer_flags_; + // Dithering strength, deduced from decoding options + int dither_; // whether to use dithering or not + VP8Random dithering_rg_; // random generator for dithering // dequantization (one set of DC/AC dequant factor per segment) VP8QuantMatrix dqm_[NUM_MB_SEGMENTS]; @@ -227,24 +225,18 @@ struct VP8Decoder { VP8Proba proba_; int use_skip_proba_; uint8_t skip_p_; -#ifndef ONLY_KEYFRAME_CODE - uint8_t intra_p_, last_p_, golden_p_; - VP8Proba proba_saved_; - int update_proba_; -#endif // Boundary data cache and persistent buffers. - uint8_t* intra_t_; // top intra modes values: 4 * mb_w_ - uint8_t intra_l_[4]; // left intra modes values - uint8_t* y_t_; // top luma samples: 16 * mb_w_ - uint8_t* u_t_, *v_t_; // top u/v samples: 8 * mb_w_ each + uint8_t* intra_t_; // top intra modes values: 4 * mb_w_ + uint8_t intra_l_[4]; // left intra modes values - VP8MB* mb_info_; // contextual macroblock info (mb_w_ + 1) - VP8FInfo* f_info_; // filter strength info - uint8_t* yuv_b_; // main block for Y/U/V (size = YUV_SIZE) - int16_t* coeffs_; // 384 coeffs = (16+8+8) * 4*4 + VP8TopSamples* yuv_t_; // top y/u/v samples - uint8_t* cache_y_; // macroblock row for storing unfiltered samples + VP8MB* mb_info_; // contextual macroblock info (mb_w_ + 1) + VP8FInfo* f_info_; // filter strength info + uint8_t* yuv_b_; // main block for Y/U/V (size = YUV_SIZE) + + uint8_t* cache_y_; // macroblock row for storing unfiltered samples uint8_t* cache_u_; uint8_t* cache_v_; int cache_y_stride_; @@ -256,31 +248,19 @@ struct VP8Decoder { // Per macroblock non-persistent infos. int mb_x_, mb_y_; // current position, in macroblock units - uint8_t is_i4x4_; // true if intra4x4 - uint8_t imodes_[16]; // one 16x16 mode (#0) or sixteen 4x4 modes - uint8_t uvmode_; // chroma prediction mode - uint8_t segment_; // block's segment - - // bit-wise info about the content of each sub-4x4 blocks: there are 16 bits - // for luma (bits #0->#15), then 4 bits for chroma-u (#16->#19) and 4 bits for - // chroma-v (#20->#23), each corresponding to one 4x4 block in decoding order. - // If the bit is set, the 4x4 block contains some non-zero coefficients. - uint32_t non_zero_; - uint32_t non_zero_ac_; + VP8MBData* mb_data_; // parsed reconstruction data // Filtering side-info - int filter_type_; // 0=off, 1=simple, 2=complex - int filter_row_; // per-row flag - uint8_t filter_levels_[NUM_MB_SEGMENTS]; // precalculated per-segment + int filter_type_; // 0=off, 1=simple, 2=complex + VP8FInfo fstrengths_[NUM_MB_SEGMENTS][2]; // precalculated per-segment/type - // extensions - const uint8_t* alpha_data_; // compressed alpha data (if present) + // Alpha + struct ALPHDecoder* alph_dec_; // alpha-plane decoder object + const uint8_t* alpha_data_; // compressed alpha data (if present) size_t alpha_data_size_; - uint8_t* alpha_plane_; // output. Persistent, contains the whole data. - - int layer_colorspace_; - const uint8_t* layer_data_; // compressed layer data (if present) - size_t layer_data_size_; + int is_alpha_decoded_; // true if alpha_data_ is decoded in alpha_plane_ + uint8_t* alpha_plane_; // output. Persistent, contains the whole data. + int alpha_dithering_; // derived from decoding options (0=off, 100=full). }; //------------------------------------------------------------------------------ @@ -293,15 +273,14 @@ int VP8SetError(VP8Decoder* const dec, // in tree.c void VP8ResetProba(VP8Proba* const proba); void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec); -void VP8ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec); +// parses one row of intra mode data in partition 0, returns !eof +int VP8ParseIntraModeRow(VP8BitReader* const br, VP8Decoder* const dec); // in quant.c void VP8ParseQuant(VP8Decoder* const dec); // in frame.c -int VP8InitFrame(VP8Decoder* const dec, VP8Io* io); -// Predict a block and add residual -void VP8ReconstructBlock(VP8Decoder* const dec); +int VP8InitFrame(VP8Decoder* const dec, VP8Io* const io); // Call io->setup() and finish setting up scan parameters. // After this call returns, one must always call VP8ExitCritical() with the // same parameters. Both functions should be used in pair. Returns VP8_STATUS_OK @@ -310,10 +289,16 @@ VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io); // Must always be called in pair with VP8EnterCritical(). // Returns false in case of error. int VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io); -// Process the last decoded row (filtering + output) +// Return the multi-threading method to use (0=off), depending +// on options and bitstream size. Only for lossy decoding. +int VP8GetThreadMethod(const WebPDecoderOptions* const options, + const WebPHeaderStructure* const headers, + int width, int height); +// Initialize dithering post-process if needed. +void VP8InitDithering(const WebPDecoderOptions* const options, + VP8Decoder* const dec); +// Process the last decoded row (filtering + output). int VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io); -// Store a block, along with filtering params -void VP8StoreBlock(VP8Decoder* const dec); // To be called at the start of a new scanline, to initialize predictors. void VP8InitScanline(VP8Decoder* const dec); // Decode one macroblock. Returns false if there is not enough data. @@ -323,12 +308,9 @@ int VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br); const uint8_t* VP8DecompressAlphaRows(VP8Decoder* const dec, int row, int num_rows); -// in layer.c -int VP8DecodeLayer(VP8Decoder* const dec); - //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/dec/vp8l.c b/drivers/webp/dec/vp8l.c index 897e4395c7..19665a007d 100644 --- a/drivers/webp/dec/vp8l.c +++ b/drivers/webp/dec/vp8l.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // main entry for the decoder @@ -10,18 +12,17 @@ // Authors: Vikas Arora (vikaas.arora@gmail.com) // Jyrki Alakuijala (jyrki@google.com) -#include <stdio.h> #include <stdlib.h> + +#include "./alphai.h" #include "./vp8li.h" +#include "../dsp/dsp.h" #include "../dsp/lossless.h" #include "../dsp/yuv.h" +#include "../utils/endian_inl.h" #include "../utils/huffman.h" #include "../utils/utils.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - #define NUM_ARGB_CACHE_ROWS 16 static const int kCodeLengthLiterals = 16; @@ -50,6 +51,9 @@ static const uint16_t kAlphabetSize[HUFFMAN_CODES_PER_META_CODE] = { NUM_DISTANCE_CODES }; +static const uint8_t kLiteralMap[HUFFMAN_CODES_PER_META_CODE] = { + 0, 1, 1, 1, 0 +}; #define NUM_CODE_LENGTH_CODES 19 static const uint8_t kCodeLengthCodeOrder[NUM_CODE_LENGTH_CODES] = { @@ -57,19 +61,43 @@ static const uint8_t kCodeLengthCodeOrder[NUM_CODE_LENGTH_CODES] = { }; #define CODE_TO_PLANE_CODES 120 -static const uint8_t code_to_plane_lut[CODE_TO_PLANE_CODES] = { - 0x18, 0x07, 0x17, 0x19, 0x28, 0x06, 0x27, 0x29, 0x16, 0x1a, - 0x26, 0x2a, 0x38, 0x05, 0x37, 0x39, 0x15, 0x1b, 0x36, 0x3a, - 0x25, 0x2b, 0x48, 0x04, 0x47, 0x49, 0x14, 0x1c, 0x35, 0x3b, - 0x46, 0x4a, 0x24, 0x2c, 0x58, 0x45, 0x4b, 0x34, 0x3c, 0x03, - 0x57, 0x59, 0x13, 0x1d, 0x56, 0x5a, 0x23, 0x2d, 0x44, 0x4c, - 0x55, 0x5b, 0x33, 0x3d, 0x68, 0x02, 0x67, 0x69, 0x12, 0x1e, - 0x66, 0x6a, 0x22, 0x2e, 0x54, 0x5c, 0x43, 0x4d, 0x65, 0x6b, - 0x32, 0x3e, 0x78, 0x01, 0x77, 0x79, 0x53, 0x5d, 0x11, 0x1f, - 0x64, 0x6c, 0x42, 0x4e, 0x76, 0x7a, 0x21, 0x2f, 0x75, 0x7b, - 0x31, 0x3f, 0x63, 0x6d, 0x52, 0x5e, 0x00, 0x74, 0x7c, 0x41, - 0x4f, 0x10, 0x20, 0x62, 0x6e, 0x30, 0x73, 0x7d, 0x51, 0x5f, - 0x40, 0x72, 0x7e, 0x61, 0x6f, 0x50, 0x71, 0x7f, 0x60, 0x70 +static const uint8_t kCodeToPlane[CODE_TO_PLANE_CODES] = { + 0x18, 0x07, 0x17, 0x19, 0x28, 0x06, 0x27, 0x29, 0x16, 0x1a, + 0x26, 0x2a, 0x38, 0x05, 0x37, 0x39, 0x15, 0x1b, 0x36, 0x3a, + 0x25, 0x2b, 0x48, 0x04, 0x47, 0x49, 0x14, 0x1c, 0x35, 0x3b, + 0x46, 0x4a, 0x24, 0x2c, 0x58, 0x45, 0x4b, 0x34, 0x3c, 0x03, + 0x57, 0x59, 0x13, 0x1d, 0x56, 0x5a, 0x23, 0x2d, 0x44, 0x4c, + 0x55, 0x5b, 0x33, 0x3d, 0x68, 0x02, 0x67, 0x69, 0x12, 0x1e, + 0x66, 0x6a, 0x22, 0x2e, 0x54, 0x5c, 0x43, 0x4d, 0x65, 0x6b, + 0x32, 0x3e, 0x78, 0x01, 0x77, 0x79, 0x53, 0x5d, 0x11, 0x1f, + 0x64, 0x6c, 0x42, 0x4e, 0x76, 0x7a, 0x21, 0x2f, 0x75, 0x7b, + 0x31, 0x3f, 0x63, 0x6d, 0x52, 0x5e, 0x00, 0x74, 0x7c, 0x41, + 0x4f, 0x10, 0x20, 0x62, 0x6e, 0x30, 0x73, 0x7d, 0x51, 0x5f, + 0x40, 0x72, 0x7e, 0x61, 0x6f, 0x50, 0x71, 0x7f, 0x60, 0x70 +}; + +// Memory needed for lookup tables of one Huffman tree group. Red, blue, alpha +// and distance alphabets are constant (256 for red, blue and alpha, 40 for +// distance) and lookup table sizes for them in worst case are 630 and 410 +// respectively. Size of green alphabet depends on color cache size and is equal +// to 256 (green component values) + 24 (length prefix values) +// + color_cache_size (between 0 and 2048). +// All values computed for 8-bit first level lookup with Mark Adler's tool: +// http://www.hdfgroup.org/ftp/lib-external/zlib/zlib-1.2.5/examples/enough.c +#define FIXED_TABLE_SIZE (630 * 3 + 410) +static const int kTableSize[12] = { + FIXED_TABLE_SIZE + 654, + FIXED_TABLE_SIZE + 656, + FIXED_TABLE_SIZE + 658, + FIXED_TABLE_SIZE + 662, + FIXED_TABLE_SIZE + 670, + FIXED_TABLE_SIZE + 686, + FIXED_TABLE_SIZE + 718, + FIXED_TABLE_SIZE + 782, + FIXED_TABLE_SIZE + 912, + FIXED_TABLE_SIZE + 1168, + FIXED_TABLE_SIZE + 1680, + FIXED_TABLE_SIZE + 2704 }; static int DecodeImageStream(int xsize, int ysize, @@ -80,27 +108,28 @@ static int DecodeImageStream(int xsize, int ysize, //------------------------------------------------------------------------------ int VP8LCheckSignature(const uint8_t* const data, size_t size) { - return (size >= 1) && (data[0] == VP8L_MAGIC_BYTE); + return (size >= VP8L_FRAME_HEADER_SIZE && + data[0] == VP8L_MAGIC_BYTE && + (data[4] >> 5) == 0); // version } static int ReadImageInfo(VP8LBitReader* const br, int* const width, int* const height, int* const has_alpha) { - const uint8_t signature = VP8LReadBits(br, 8); - if (!VP8LCheckSignature(&signature, 1)) { - return 0; - } + if (VP8LReadBits(br, 8) != VP8L_MAGIC_BYTE) return 0; *width = VP8LReadBits(br, VP8L_IMAGE_SIZE_BITS) + 1; *height = VP8LReadBits(br, VP8L_IMAGE_SIZE_BITS) + 1; *has_alpha = VP8LReadBits(br, 1); - VP8LReadBits(br, VP8L_VERSION_BITS); // Read/ignore the version number. - return 1; + if (VP8LReadBits(br, VP8L_VERSION_BITS) != 0) return 0; + return !br->eos_; } int VP8LGetInfo(const uint8_t* data, size_t data_size, int* const width, int* const height, int* const has_alpha) { if (data == NULL || data_size < VP8L_FRAME_HEADER_SIZE) { return 0; // not enough data + } else if (!VP8LCheckSignature(data, data_size)) { + return 0; // bad signature } else { int w, h, a; VP8LBitReader br; @@ -138,39 +167,80 @@ static WEBP_INLINE int PlaneCodeToDistance(int xsize, int plane_code) { if (plane_code > CODE_TO_PLANE_CODES) { return plane_code - CODE_TO_PLANE_CODES; } else { - const int dist_code = code_to_plane_lut[plane_code - 1]; + const int dist_code = kCodeToPlane[plane_code - 1]; const int yoffset = dist_code >> 4; const int xoffset = 8 - (dist_code & 0xf); const int dist = yoffset * xsize + xoffset; - return (dist >= 1) ? dist : 1; + return (dist >= 1) ? dist : 1; // dist<1 can happen if xsize is very small } } //------------------------------------------------------------------------------ // Decodes the next Huffman code from bit-stream. // FillBitWindow(br) needs to be called at minimum every second call -// to ReadSymbolUnsafe. -static int ReadSymbolUnsafe(const HuffmanTree* tree, VP8LBitReader* const br) { - const HuffmanTreeNode* node = tree->root_; - assert(node != NULL); - while (!HuffmanTreeNodeIsLeaf(node)) { - node = HuffmanTreeNextNode(node, VP8LReadOneBitUnsafe(br)); - } - return node->symbol_; +// to ReadSymbol, in order to pre-fetch enough bits. +static WEBP_INLINE int ReadSymbol(const HuffmanCode* table, + VP8LBitReader* const br) { + int nbits; + uint32_t val = VP8LPrefetchBits(br); + table += val & HUFFMAN_TABLE_MASK; + nbits = table->bits - HUFFMAN_TABLE_BITS; + if (nbits > 0) { + VP8LSetBitPos(br, br->bit_pos_ + HUFFMAN_TABLE_BITS); + val = VP8LPrefetchBits(br); + table += table->value; + table += val & ((1 << nbits) - 1); + } + VP8LSetBitPos(br, br->bit_pos_ + table->bits); + return table->value; } -static WEBP_INLINE int ReadSymbol(const HuffmanTree* tree, - VP8LBitReader* const br) { - const int read_safe = (br->pos_ + 8 > br->len_); - if (!read_safe) { - return ReadSymbolUnsafe(tree, br); +// Reads packed symbol depending on GREEN channel +#define BITS_SPECIAL_MARKER 0x100 // something large enough (and a bit-mask) +#define PACKED_NON_LITERAL_CODE 0 // must be < NUM_LITERAL_CODES +static WEBP_INLINE int ReadPackedSymbols(const HTreeGroup* group, + VP8LBitReader* const br, + uint32_t* const dst) { + const uint32_t val = VP8LPrefetchBits(br) & (HUFFMAN_PACKED_TABLE_SIZE - 1); + const HuffmanCode32 code = group->packed_table[val]; + assert(group->use_packed_table); + if (code.bits < BITS_SPECIAL_MARKER) { + VP8LSetBitPos(br, br->bit_pos_ + code.bits); + *dst = code.value; + return PACKED_NON_LITERAL_CODE; } else { - const HuffmanTreeNode* node = tree->root_; - assert(node != NULL); - while (!HuffmanTreeNodeIsLeaf(node)) { - node = HuffmanTreeNextNode(node, VP8LReadOneBit(br)); + VP8LSetBitPos(br, br->bit_pos_ + code.bits - BITS_SPECIAL_MARKER); + assert(code.value >= NUM_LITERAL_CODES); + return code.value; + } +} + +static int AccumulateHCode(HuffmanCode hcode, int shift, + HuffmanCode32* const huff) { + huff->bits += hcode.bits; + huff->value |= (uint32_t)hcode.value << shift; + assert(huff->bits <= HUFFMAN_TABLE_BITS); + return hcode.bits; +} + +static void BuildPackedTable(HTreeGroup* const htree_group) { + uint32_t code; + for (code = 0; code < HUFFMAN_PACKED_TABLE_SIZE; ++code) { + uint32_t bits = code; + HuffmanCode32* const huff = &htree_group->packed_table[bits]; + HuffmanCode hcode = htree_group->htrees[GREEN][bits]; + if (hcode.value >= NUM_LITERAL_CODES) { + huff->bits = hcode.bits + BITS_SPECIAL_MARKER; + huff->value = hcode.value; + } else { + huff->bits = 0; + huff->value = 0; + bits >>= AccumulateHCode(hcode, 8, huff); + bits >>= AccumulateHCode(htree_group->htrees[RED][bits], 16, huff); + bits >>= AccumulateHCode(htree_group->htrees[BLUE][bits], 0, huff); + bits >>= AccumulateHCode(htree_group->htrees[ALPHA][bits], 24, huff); + (void)bits; } - return node->symbol_; } } @@ -182,19 +252,18 @@ static int ReadHuffmanCodeLengths( int symbol; int max_symbol; int prev_code_len = DEFAULT_CODE_LENGTH; - HuffmanTree tree; + HuffmanCode table[1 << LENGTHS_TABLE_BITS]; - if (!HuffmanTreeBuildImplicit(&tree, code_length_code_lengths, - NUM_CODE_LENGTH_CODES)) { - dec->status_ = VP8_STATUS_BITSTREAM_ERROR; - return 0; + if (!VP8LBuildHuffmanTable(table, LENGTHS_TABLE_BITS, + code_length_code_lengths, + NUM_CODE_LENGTH_CODES)) { + goto End; } if (VP8LReadBits(br, 1)) { // use length const int length_nbits = 2 + 2 * VP8LReadBits(br, 3); max_symbol = 2 + VP8LReadBits(br, length_nbits); if (max_symbol > num_symbols) { - dec->status_ = VP8_STATUS_BITSTREAM_ERROR; goto End; } } else { @@ -203,10 +272,13 @@ static int ReadHuffmanCodeLengths( symbol = 0; while (symbol < num_symbols) { + const HuffmanCode* p; int code_len; if (max_symbol-- == 0) break; VP8LFillBitWindow(br); - code_len = ReadSymbol(&tree, br); + p = &table[VP8LPrefetchBits(br) & LENGTHS_TABLE_MASK]; + VP8LSetBitPos(br, br->bit_pos_ + p->bits); + code_len = p->value; if (code_len < kCodeLengthLiterals) { code_lengths[symbol++] = code_len; if (code_len != 0) prev_code_len = code_len; @@ -217,7 +289,6 @@ static int ReadHuffmanCodeLengths( const int repeat_offset = kCodeLengthRepeatOffsets[slot]; int repeat = VP8LReadBits(br, extra_bits) + repeat_offset; if (symbol + repeat > num_symbols) { - dec->status_ = VP8_STATUS_BITSTREAM_ERROR; goto End; } else { const int length = use_prev ? prev_code_len : 0; @@ -228,36 +299,34 @@ static int ReadHuffmanCodeLengths( ok = 1; End: - HuffmanTreeRelease(&tree); + if (!ok) dec->status_ = VP8_STATUS_BITSTREAM_ERROR; return ok; } +// 'code_lengths' is pre-allocated temporary buffer, used for creating Huffman +// tree. static int ReadHuffmanCode(int alphabet_size, VP8LDecoder* const dec, - HuffmanTree* const tree) { + int* const code_lengths, HuffmanCode* const table) { int ok = 0; + int size = 0; VP8LBitReader* const br = &dec->br_; const int simple_code = VP8LReadBits(br, 1); + memset(code_lengths, 0, alphabet_size * sizeof(*code_lengths)); + if (simple_code) { // Read symbols, codes & code lengths directly. - int symbols[2]; - int codes[2]; - int code_lengths[2]; const int num_symbols = VP8LReadBits(br, 1) + 1; const int first_symbol_len_code = VP8LReadBits(br, 1); // The first code is either 1 bit or 8 bit code. - symbols[0] = VP8LReadBits(br, (first_symbol_len_code == 0) ? 1 : 8); - codes[0] = 0; - code_lengths[0] = num_symbols - 1; + int symbol = VP8LReadBits(br, (first_symbol_len_code == 0) ? 1 : 8); + code_lengths[symbol] = 1; // The second code (if present), is always 8 bit long. if (num_symbols == 2) { - symbols[1] = VP8LReadBits(br, 8); - codes[1] = 1; - code_lengths[1] = num_symbols - 1; + symbol = VP8LReadBits(br, 8); + code_lengths[symbol] = 1; } - ok = HuffmanTreeBuildExplicit(tree, code_lengths, codes, symbols, - alphabet_size, num_symbols); + ok = 1; } else { // Decode Huffman-coded code lengths. - int* code_lengths = NULL; int i; int code_length_code_lengths[NUM_CODE_LENGTH_CODES] = { 0 }; const int num_codes = VP8LReadBits(br, 4) + 4; @@ -266,42 +335,23 @@ static int ReadHuffmanCode(int alphabet_size, VP8LDecoder* const dec, return 0; } - code_lengths = - (int*)WebPSafeCalloc((uint64_t)alphabet_size, sizeof(*code_lengths)); - if (code_lengths == NULL) { - dec->status_ = VP8_STATUS_OUT_OF_MEMORY; - return 0; - } - for (i = 0; i < num_codes; ++i) { code_length_code_lengths[kCodeLengthCodeOrder[i]] = VP8LReadBits(br, 3); } ok = ReadHuffmanCodeLengths(dec, code_length_code_lengths, alphabet_size, code_lengths); - if (ok) { - ok = HuffmanTreeBuildImplicit(tree, code_lengths, alphabet_size); - } - free(code_lengths); } - ok = ok && !br->error_; - if (!ok) { + + ok = ok && !br->eos_; + if (ok) { + size = VP8LBuildHuffmanTable(table, HUFFMAN_TABLE_BITS, + code_lengths, alphabet_size); + } + if (!ok || size == 0) { dec->status_ = VP8_STATUS_BITSTREAM_ERROR; return 0; } - return 1; -} - -static void DeleteHtreeGroups(HTreeGroup* htree_groups, int num_htree_groups) { - if (htree_groups != NULL) { - int i, j; - for (i = 0; i < num_htree_groups; ++i) { - HuffmanTree* const htrees = htree_groups[i].htrees_; - for (j = 0; j < HUFFMAN_CODES_PER_META_CODE; ++j) { - HuffmanTreeRelease(&htrees[j]); - } - } - free(htree_groups); - } + return size; } static int ReadHuffmanCodes(VP8LDecoder* const dec, int xsize, int ysize, @@ -311,7 +361,12 @@ static int ReadHuffmanCodes(VP8LDecoder* const dec, int xsize, int ysize, VP8LMetadata* const hdr = &dec->hdr_; uint32_t* huffman_image = NULL; HTreeGroup* htree_groups = NULL; + HuffmanCode* huffman_tables = NULL; + HuffmanCode* next = NULL; int num_htree_groups = 1; + int max_alphabet_size = 0; + int* code_lengths = NULL; + const int table_size = kTableSize[color_cache_bits]; if (allow_recursion && VP8LReadBits(br, 1)) { // use meta Huffman codes. @@ -321,51 +376,108 @@ static int ReadHuffmanCodes(VP8LDecoder* const dec, int xsize, int ysize, const int huffman_pixs = huffman_xsize * huffman_ysize; if (!DecodeImageStream(huffman_xsize, huffman_ysize, 0, dec, &huffman_image)) { - dec->status_ = VP8_STATUS_BITSTREAM_ERROR; goto Error; } hdr->huffman_subsample_bits_ = huffman_precision; for (i = 0; i < huffman_pixs; ++i) { // The huffman data is stored in red and green bytes. - const int index = (huffman_image[i] >> 8) & 0xffff; - huffman_image[i] = index; - if (index >= num_htree_groups) { - num_htree_groups = index + 1; + const int group = (huffman_image[i] >> 8) & 0xffff; + huffman_image[i] = group; + if (group >= num_htree_groups) { + num_htree_groups = group + 1; } } } - if (br->error_) goto Error; + if (br->eos_) goto Error; + + // Find maximum alphabet size for the htree group. + for (j = 0; j < HUFFMAN_CODES_PER_META_CODE; ++j) { + int alphabet_size = kAlphabetSize[j]; + if (j == 0 && color_cache_bits > 0) { + alphabet_size += 1 << color_cache_bits; + } + if (max_alphabet_size < alphabet_size) { + max_alphabet_size = alphabet_size; + } + } + + huffman_tables = (HuffmanCode*)WebPSafeMalloc(num_htree_groups * table_size, + sizeof(*huffman_tables)); + htree_groups = VP8LHtreeGroupsNew(num_htree_groups); + code_lengths = (int*)WebPSafeCalloc((uint64_t)max_alphabet_size, + sizeof(*code_lengths)); - assert(num_htree_groups <= 0x10000); - htree_groups = - (HTreeGroup*)WebPSafeCalloc((uint64_t)num_htree_groups, - sizeof(*htree_groups)); - if (htree_groups == NULL) { + if (htree_groups == NULL || code_lengths == NULL || huffman_tables == NULL) { dec->status_ = VP8_STATUS_OUT_OF_MEMORY; goto Error; } + next = huffman_tables; for (i = 0; i < num_htree_groups; ++i) { - HuffmanTree* const htrees = htree_groups[i].htrees_; + HTreeGroup* const htree_group = &htree_groups[i]; + HuffmanCode** const htrees = htree_group->htrees; + int size; + int total_size = 0; + int is_trivial_literal = 1; + int max_bits = 0; for (j = 0; j < HUFFMAN_CODES_PER_META_CODE; ++j) { int alphabet_size = kAlphabetSize[j]; + htrees[j] = next; if (j == 0 && color_cache_bits > 0) { alphabet_size += 1 << color_cache_bits; } - if (!ReadHuffmanCode(alphabet_size, dec, htrees + j)) goto Error; + size = ReadHuffmanCode(alphabet_size, dec, code_lengths, next); + if (is_trivial_literal && kLiteralMap[j] == 1) { + is_trivial_literal = (next->bits == 0); + } + total_size += next->bits; + next += size; + if (size == 0) { + goto Error; + } + if (j <= ALPHA) { + int local_max_bits = code_lengths[0]; + int k; + for (k = 1; k < alphabet_size; ++k) { + if (code_lengths[k] > local_max_bits) { + local_max_bits = code_lengths[k]; + } + } + max_bits += local_max_bits; + } } + htree_group->is_trivial_literal = is_trivial_literal; + htree_group->is_trivial_code = 0; + if (is_trivial_literal) { + const int red = htrees[RED][0].value; + const int blue = htrees[BLUE][0].value; + const int alpha = htrees[ALPHA][0].value; + htree_group->literal_arb = + ((uint32_t)alpha << 24) | (red << 16) | blue; + if (total_size == 0 && htrees[GREEN][0].value < NUM_LITERAL_CODES) { + htree_group->is_trivial_code = 1; + htree_group->literal_arb |= htrees[GREEN][0].value << 8; + } + } + htree_group->use_packed_table = !htree_group->is_trivial_code && + (max_bits < HUFFMAN_PACKED_BITS); + if (htree_group->use_packed_table) BuildPackedTable(htree_group); } + WebPSafeFree(code_lengths); // All OK. Finalize pointers and return. hdr->huffman_image_ = huffman_image; hdr->num_htree_groups_ = num_htree_groups; hdr->htree_groups_ = htree_groups; + hdr->huffman_tables_ = huffman_tables; return 1; Error: - free(huffman_image); - DeleteHtreeGroups(htree_groups, num_htree_groups); + WebPSafeFree(code_lengths); + WebPSafeFree(huffman_image); + WebPSafeFree(huffman_tables); + VP8LHtreeGroupsFree(htree_groups); return 0; } @@ -379,13 +491,13 @@ static int AllocateAndInitRescaler(VP8LDecoder* const dec, VP8Io* const io) { const int in_height = io->mb_h; const int out_height = io->scaled_height; const uint64_t work_size = 2 * num_channels * (uint64_t)out_width; - int32_t* work; // Rescaler work area. - const uint64_t scaled_data_size = num_channels * (uint64_t)out_width; + rescaler_t* work; // Rescaler work area. + const uint64_t scaled_data_size = (uint64_t)out_width; uint32_t* scaled_data; // Temporary storage for scaled BGRA data. const uint64_t memory_size = sizeof(*dec->rescaler) + work_size * sizeof(*work) + scaled_data_size * sizeof(*scaled_data); - uint8_t* memory = (uint8_t*)WebPSafeCalloc(memory_size, sizeof(*memory)); + uint8_t* memory = (uint8_t*)WebPSafeMalloc(memory_size, sizeof(*memory)); if (memory == NULL) { dec->status_ = VP8_STATUS_OUT_OF_MEMORY; return 0; @@ -395,13 +507,12 @@ static int AllocateAndInitRescaler(VP8LDecoder* const dec, VP8Io* const io) { dec->rescaler = (WebPRescaler*)memory; memory += sizeof(*dec->rescaler); - work = (int32_t*)memory; + work = (rescaler_t*)memory; memory += work_size * sizeof(*work); scaled_data = (uint32_t*)memory; WebPRescalerInit(dec->rescaler, in_width, in_height, (uint8_t*)scaled_data, - out_width, out_height, 0, num_channels, - in_width, out_width, in_height, out_height, work); + out_width, out_height, 0, num_channels, work); return 1; } @@ -411,12 +522,13 @@ static int AllocateAndInitRescaler(VP8LDecoder* const dec, VP8Io* const io) { // We have special "export" function since we need to convert from BGRA static int Export(WebPRescaler* const rescaler, WEBP_CSP_MODE colorspace, int rgba_stride, uint8_t* const rgba) { - const uint32_t* const src = (const uint32_t*)rescaler->dst; + uint32_t* const src = (uint32_t*)rescaler->dst; const int dst_width = rescaler->dst_width; int num_lines_out = 0; while (WebPRescalerHasPendingOutput(rescaler)) { uint8_t* const dst = rgba + num_lines_out * rgba_stride; WebPRescalerExportRow(rescaler); + WebPMultARGBRow(src, dst_width, 1); VP8LConvertFromBGRA(src, dst_width, colorspace, dst); ++num_lines_out; } @@ -424,18 +536,22 @@ static int Export(WebPRescaler* const rescaler, WEBP_CSP_MODE colorspace, } // Emit scaled rows. -static int EmitRescaledRows(const VP8LDecoder* const dec, - const uint32_t* const data, int in_stride, int mb_h, - uint8_t* const out, int out_stride) { +static int EmitRescaledRowsRGBA(const VP8LDecoder* const dec, + uint8_t* in, int in_stride, int mb_h, + uint8_t* const out, int out_stride) { const WEBP_CSP_MODE colorspace = dec->output_->colorspace; - const uint8_t* const in = (const uint8_t*)data; int num_lines_in = 0; int num_lines_out = 0; while (num_lines_in < mb_h) { - const uint8_t* const row_in = in + num_lines_in * in_stride; + uint8_t* const row_in = in + num_lines_in * in_stride; uint8_t* const row_out = out + num_lines_out * out_stride; - num_lines_in += WebPRescalerImport(dec->rescaler, mb_h - num_lines_in, - row_in, in_stride); + const int lines_left = mb_h - num_lines_in; + const int needed_lines = WebPRescaleNeededLines(dec->rescaler, lines_left); + assert(needed_lines > 0 && needed_lines <= lines_left); + WebPMultARGBRows(row_in, in_stride, + dec->rescaler->src_width, needed_lines, 0); + WebPRescalerImport(dec->rescaler, lines_left, row_in, in_stride); + num_lines_in += needed_lines; num_lines_out += Export(dec->rescaler, colorspace, out_stride, row_out); } return num_lines_out; @@ -443,11 +559,10 @@ static int EmitRescaledRows(const VP8LDecoder* const dec, // Emit rows without any scaling. static int EmitRows(WEBP_CSP_MODE colorspace, - const uint32_t* const data, int in_stride, + const uint8_t* row_in, int in_stride, int mb_w, int mb_h, uint8_t* const out, int out_stride) { int lines = mb_h; - const uint8_t* row_in = (const uint8_t*)data; uint8_t* row_out = out; while (lines-- > 0) { VP8LConvertFromBGRA((const uint32_t*)row_in, mb_w, colorspace, row_out); @@ -463,72 +578,37 @@ static int EmitRows(WEBP_CSP_MODE colorspace, static void ConvertToYUVA(const uint32_t* const src, int width, int y_pos, const WebPDecBuffer* const output) { const WebPYUVABuffer* const buf = &output->u.YUVA; + // first, the luma plane - { - int i; - uint8_t* const y = buf->y + y_pos * buf->y_stride; - for (i = 0; i < width; ++i) { - const uint32_t p = src[i]; - y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff); - } - } + WebPConvertARGBToY(src, buf->y + y_pos * buf->y_stride, width); // then U/V planes { uint8_t* const u = buf->u + (y_pos >> 1) * buf->u_stride; uint8_t* const v = buf->v + (y_pos >> 1) * buf->v_stride; - const int uv_width = width >> 1; - int i; - for (i = 0; i < uv_width; ++i) { - const uint32_t v0 = src[2 * i + 0]; - const uint32_t v1 = src[2 * i + 1]; - // VP8RGBToU/V expects four accumulated pixels. Hence we need to - // scale r/g/b value by a factor 2. We just shift v0/v1 one bit less. - const int r = ((v0 >> 15) & 0x1fe) + ((v1 >> 15) & 0x1fe); - const int g = ((v0 >> 7) & 0x1fe) + ((v1 >> 7) & 0x1fe); - const int b = ((v0 << 1) & 0x1fe) + ((v1 << 1) & 0x1fe); - if (!(y_pos & 1)) { // even lines: store values - u[i] = VP8RGBToU(r, g, b); - v[i] = VP8RGBToV(r, g, b); - } else { // odd lines: average with previous values - const int tmp_u = VP8RGBToU(r, g, b); - const int tmp_v = VP8RGBToV(r, g, b); - // Approximated average-of-four. But it's an acceptable diff. - u[i] = (u[i] + tmp_u + 1) >> 1; - v[i] = (v[i] + tmp_v + 1) >> 1; - } - } - if (width & 1) { // last pixel - const uint32_t v0 = src[2 * i + 0]; - const int r = (v0 >> 14) & 0x3fc; - const int g = (v0 >> 6) & 0x3fc; - const int b = (v0 << 2) & 0x3fc; - if (!(y_pos & 1)) { // even lines - u[i] = VP8RGBToU(r, g, b); - v[i] = VP8RGBToV(r, g, b); - } else { // odd lines (note: we could just skip this) - const int tmp_u = VP8RGBToU(r, g, b); - const int tmp_v = VP8RGBToV(r, g, b); - u[i] = (u[i] + tmp_u + 1) >> 1; - v[i] = (v[i] + tmp_v + 1) >> 1; - } - } + // even lines: store values + // odd lines: average with previous values + WebPConvertARGBToUV(src, u, v, width, !(y_pos & 1)); } // Lastly, store alpha if needed. if (buf->a != NULL) { - int i; uint8_t* const a = buf->a + y_pos * buf->a_stride; - for (i = 0; i < width; ++i) a[i] = (src[i] >> 24); +#if defined(WORDS_BIGENDIAN) + WebPExtractAlpha((uint8_t*)src + 0, 0, width, 1, a, 0); +#else + WebPExtractAlpha((uint8_t*)src + 3, 0, width, 1, a, 0); +#endif } } static int ExportYUVA(const VP8LDecoder* const dec, int y_pos) { WebPRescaler* const rescaler = dec->rescaler; - const uint32_t* const src = (const uint32_t*)rescaler->dst; + uint32_t* const src = (uint32_t*)rescaler->dst; const int dst_width = rescaler->dst_width; int num_lines_out = 0; while (WebPRescalerHasPendingOutput(rescaler)) { WebPRescalerExportRow(rescaler); + WebPMultARGBRow(src, dst_width, 1); ConvertToYUVA(src, dst_width, y_pos, dec->output_); ++y_pos; ++num_lines_out; @@ -537,28 +617,28 @@ static int ExportYUVA(const VP8LDecoder* const dec, int y_pos) { } static int EmitRescaledRowsYUVA(const VP8LDecoder* const dec, - const uint32_t* const data, - int in_stride, int mb_h) { - const uint8_t* const in = (const uint8_t*)data; + uint8_t* in, int in_stride, int mb_h) { int num_lines_in = 0; int y_pos = dec->last_out_row_; while (num_lines_in < mb_h) { - const uint8_t* const row_in = in + num_lines_in * in_stride; - num_lines_in += WebPRescalerImport(dec->rescaler, mb_h - num_lines_in, - row_in, in_stride); + const int lines_left = mb_h - num_lines_in; + const int needed_lines = WebPRescaleNeededLines(dec->rescaler, lines_left); + WebPMultARGBRows(in, in_stride, dec->rescaler->src_width, needed_lines, 0); + WebPRescalerImport(dec->rescaler, lines_left, in, in_stride); + num_lines_in += needed_lines; + in += needed_lines * in_stride; y_pos += ExportYUVA(dec, y_pos); } return y_pos; } static int EmitRowsYUVA(const VP8LDecoder* const dec, - const uint32_t* const data, int in_stride, + const uint8_t* in, int in_stride, int mb_w, int num_rows) { int y_pos = dec->last_out_row_; - const uint8_t* row_in = (const uint8_t*)data; while (num_rows-- > 0) { - ConvertToYUVA((const uint32_t*)row_in, mb_w, y_pos, dec->output_); - row_in += in_stride; + ConvertToYUVA((const uint32_t*)in, mb_w, y_pos, dec->output_); + in += in_stride; ++y_pos; } return y_pos; @@ -569,11 +649,11 @@ static int EmitRowsYUVA(const VP8LDecoder* const dec, // Sets io->mb_y, io->mb_h & io->mb_w according to start row, end row and // crop options. Also updates the input data pointer, so that it points to the -// start of the cropped window. -// Note that 'pixel_stride' is in units of 'uint32_t' (and not 'bytes). +// start of the cropped window. Note that pixels are in ARGB format even if +// 'in_data' is uint8_t*. // Returns true if the crop window is not empty. static int SetCropWindow(VP8Io* const io, int y_start, int y_end, - const uint32_t** const in_data, int pixel_stride) { + uint8_t** const in_data, int pixel_stride) { assert(y_start < y_end); assert(io->crop_left < io->crop_right); if (y_end > io->crop_bottom) { @@ -582,11 +662,11 @@ static int SetCropWindow(VP8Io* const io, int y_start, int y_end, if (y_start < io->crop_top) { const int delta = io->crop_top - y_start; y_start = io->crop_top; - *in_data += pixel_stride * delta; + *in_data += delta * pixel_stride; } if (y_start >= y_end) return 0; // Crop window is empty. - *in_data += io->crop_left; + *in_data += io->crop_left * sizeof(uint32_t); io->mb_y = y_start - io->crop_top; io->mb_w = io->crop_right - io->crop_left; @@ -634,10 +714,24 @@ static void ApplyInverseTransforms(VP8LDecoder* const dec, int num_rows, } } +// Special method for paletted alpha data. +static void ApplyInverseTransformsAlpha(VP8LDecoder* const dec, int num_rows, + const uint8_t* const rows) { + const int start_row = dec->last_row_; + const int end_row = start_row + num_rows; + const uint8_t* rows_in = rows; + uint8_t* rows_out = (uint8_t*)dec->io_->opaque + dec->io_->width * start_row; + VP8LTransform* const transform = &dec->transforms_[0]; + assert(dec->next_transform_ == 1); + assert(transform->type_ == COLOR_INDEXING_TRANSFORM); + VP8LColorIndexInverseTransformAlpha(transform, start_row, end_row, rows_in, + rows_out); +} + // Processes (transforms, scales & color-converts) the rows decoded after the // last call. static void ProcessRows(VP8LDecoder* const dec, int row) { - const uint32_t* const rows = dec->argb_ + dec->width_ * dec->last_row_; + const uint32_t* const rows = dec->pixels_ + dec->width_ * dec->last_row_; const int num_rows = row - dec->last_row_; if (num_rows <= 0) return; // Nothing to be done. @@ -646,18 +740,18 @@ static void ProcessRows(VP8LDecoder* const dec, int row) { // Emit output. { VP8Io* const io = dec->io_; - const uint32_t* rows_data = dec->argb_cache_; - if (!SetCropWindow(io, dec->last_row_, row, &rows_data, io->width)) { + uint8_t* rows_data = (uint8_t*)dec->argb_cache_; + const int in_stride = io->width * sizeof(uint32_t); // in unit of RGBA + if (!SetCropWindow(io, dec->last_row_, row, &rows_data, in_stride)) { // Nothing to output (this time). } else { const WebPDecBuffer* const output = dec->output_; - const int in_stride = io->width * sizeof(*rows_data); - if (output->colorspace < MODE_YUV) { // convert to RGBA + if (WebPIsRGBMode(output->colorspace)) { // convert to RGBA const WebPRGBABuffer* const buf = &output->u.RGBA; uint8_t* const rgba = buf->rgba + dec->last_out_row_ * buf->stride; const int num_rows_out = io->use_scaling ? - EmitRescaledRows(dec, rows_data, in_stride, io->mb_h, - rgba, buf->stride) : + EmitRescaledRowsRGBA(dec, rows_data, in_stride, io->mb_h, + rgba, buf->stride) : EmitRows(output->colorspace, rows_data, in_stride, io->mb_w, io->mb_h, rgba, buf->stride); // Update 'last_out_row_'. @@ -676,50 +770,317 @@ static void ProcessRows(VP8LDecoder* const dec, int row) { assert(dec->last_row_ <= dec->height_); } -static int DecodeImageData(VP8LDecoder* const dec, - uint32_t* const data, int width, int height, - ProcessRowsFunc process_func) { +// Row-processing for the special case when alpha data contains only one +// transform (color indexing), and trivial non-green literals. +static int Is8bOptimizable(const VP8LMetadata* const hdr) { + int i; + if (hdr->color_cache_size_ > 0) return 0; + // When the Huffman tree contains only one symbol, we can skip the + // call to ReadSymbol() for red/blue/alpha channels. + for (i = 0; i < hdr->num_htree_groups_; ++i) { + HuffmanCode** const htrees = hdr->htree_groups_[i].htrees; + if (htrees[RED][0].bits > 0) return 0; + if (htrees[BLUE][0].bits > 0) return 0; + if (htrees[ALPHA][0].bits > 0) return 0; + } + return 1; +} + +static void ExtractPalettedAlphaRows(VP8LDecoder* const dec, int row) { + const int num_rows = row - dec->last_row_; + const uint8_t* const in = + (uint8_t*)dec->pixels_ + dec->width_ * dec->last_row_; + if (num_rows > 0) { + ApplyInverseTransformsAlpha(dec, num_rows, in); + } + dec->last_row_ = dec->last_out_row_ = row; +} + +//------------------------------------------------------------------------------ +// Helper functions for fast pattern copy (8b and 32b) + +// cyclic rotation of pattern word +static WEBP_INLINE uint32_t Rotate8b(uint32_t V) { +#if defined(WORDS_BIGENDIAN) + return ((V & 0xff000000u) >> 24) | (V << 8); +#else + return ((V & 0xffu) << 24) | (V >> 8); +#endif +} + +// copy 1, 2 or 4-bytes pattern +static WEBP_INLINE void CopySmallPattern8b(const uint8_t* src, uint8_t* dst, + int length, uint32_t pattern) { + int i; + // align 'dst' to 4-bytes boundary. Adjust the pattern along the way. + while ((uintptr_t)dst & 3) { + *dst++ = *src++; + pattern = Rotate8b(pattern); + --length; + } + // Copy the pattern 4 bytes at a time. + for (i = 0; i < (length >> 2); ++i) { + ((uint32_t*)dst)[i] = pattern; + } + // Finish with left-overs. 'pattern' is still correctly positioned, + // so no Rotate8b() call is needed. + for (i <<= 2; i < length; ++i) { + dst[i] = src[i]; + } +} + +static WEBP_INLINE void CopyBlock8b(uint8_t* const dst, int dist, int length) { + const uint8_t* src = dst - dist; + if (length >= 8) { + uint32_t pattern = 0; + switch (dist) { + case 1: + pattern = src[0]; +#if defined(__arm__) || defined(_M_ARM) // arm doesn't like multiply that much + pattern |= pattern << 8; + pattern |= pattern << 16; +#elif defined(WEBP_USE_MIPS_DSP_R2) + __asm__ volatile ("replv.qb %0, %0" : "+r"(pattern)); +#else + pattern = 0x01010101u * pattern; +#endif + break; + case 2: + memcpy(&pattern, src, sizeof(uint16_t)); +#if defined(__arm__) || defined(_M_ARM) + pattern |= pattern << 16; +#elif defined(WEBP_USE_MIPS_DSP_R2) + __asm__ volatile ("replv.ph %0, %0" : "+r"(pattern)); +#else + pattern = 0x00010001u * pattern; +#endif + break; + case 4: + memcpy(&pattern, src, sizeof(uint32_t)); + break; + default: + goto Copy; + break; + } + CopySmallPattern8b(src, dst, length, pattern); + return; + } + Copy: + if (dist >= length) { // no overlap -> use memcpy() + memcpy(dst, src, length * sizeof(*dst)); + } else { + int i; + for (i = 0; i < length; ++i) dst[i] = src[i]; + } +} + +// copy pattern of 1 or 2 uint32_t's +static WEBP_INLINE void CopySmallPattern32b(const uint32_t* src, + uint32_t* dst, + int length, uint64_t pattern) { + int i; + if ((uintptr_t)dst & 4) { // Align 'dst' to 8-bytes boundary. + *dst++ = *src++; + pattern = (pattern >> 32) | (pattern << 32); + --length; + } + assert(0 == ((uintptr_t)dst & 7)); + for (i = 0; i < (length >> 1); ++i) { + ((uint64_t*)dst)[i] = pattern; // Copy the pattern 8 bytes at a time. + } + if (length & 1) { // Finish with left-over. + dst[i << 1] = src[i << 1]; + } +} + +static WEBP_INLINE void CopyBlock32b(uint32_t* const dst, + int dist, int length) { + const uint32_t* const src = dst - dist; + if (dist <= 2 && length >= 4 && ((uintptr_t)dst & 3) == 0) { + uint64_t pattern; + if (dist == 1) { + pattern = (uint64_t)src[0]; + pattern |= pattern << 32; + } else { + memcpy(&pattern, src, sizeof(pattern)); + } + CopySmallPattern32b(src, dst, length, pattern); + } else if (dist >= length) { // no overlap + memcpy(dst, src, length * sizeof(*dst)); + } else { + int i; + for (i = 0; i < length; ++i) dst[i] = src[i]; + } +} + +//------------------------------------------------------------------------------ + +static int DecodeAlphaData(VP8LDecoder* const dec, uint8_t* const data, + int width, int height, int last_row) { int ok = 1; - int col = 0, row = 0; + int row = dec->last_pixel_ / width; + int col = dec->last_pixel_ % width; VP8LBitReader* const br = &dec->br_; VP8LMetadata* const hdr = &dec->hdr_; - HTreeGroup* htree_group = hdr->htree_groups_; - uint32_t* src = data; - uint32_t* last_cached = data; - uint32_t* const src_end = data + width * height; + const HTreeGroup* htree_group = GetHtreeGroupForPos(hdr, col, row); + int pos = dec->last_pixel_; // current position + const int end = width * height; // End of data + const int last = width * last_row; // Last pixel to decode const int len_code_limit = NUM_LITERAL_CODES + NUM_LENGTH_CODES; - const int color_cache_limit = len_code_limit + hdr->color_cache_size_; - VP8LColorCache* const color_cache = - (hdr->color_cache_size_ > 0) ? &hdr->color_cache_ : NULL; const int mask = hdr->huffman_mask_; - assert(htree_group != NULL); + assert(pos < end); + assert(last_row <= height); + assert(Is8bOptimizable(hdr)); - while (!br->eos_ && src < src_end) { + while (!br->eos_ && pos < last) { int code; - // Only update when changing tile. Note we could use the following test: - // if "((((prev_col ^ col) | prev_row ^ row)) > mask)" -> tile changed - // but that's actually slower and requires storing the previous col/row + // Only update when changing tile. if ((col & mask) == 0) { htree_group = GetHtreeGroupForPos(hdr, col, row); } VP8LFillBitWindow(br); - code = ReadSymbol(&htree_group->htrees_[GREEN], br); - if (code < NUM_LITERAL_CODES) { // Literal. - int red, green, blue, alpha; - red = ReadSymbol(&htree_group->htrees_[RED], br); - green = code; + code = ReadSymbol(htree_group->htrees[GREEN], br); + if (code < NUM_LITERAL_CODES) { // Literal + data[pos] = code; + ++pos; + ++col; + if (col >= width) { + col = 0; + ++row; + if (row % NUM_ARGB_CACHE_ROWS == 0) { + ExtractPalettedAlphaRows(dec, row); + } + } + } else if (code < len_code_limit) { // Backward reference + int dist_code, dist; + const int length_sym = code - NUM_LITERAL_CODES; + const int length = GetCopyLength(length_sym, br); + const int dist_symbol = ReadSymbol(htree_group->htrees[DIST], br); VP8LFillBitWindow(br); - blue = ReadSymbol(&htree_group->htrees_[BLUE], br); - alpha = ReadSymbol(&htree_group->htrees_[ALPHA], br); - *src = (alpha << 24) + (red << 16) + (green << 8) + blue; - AdvanceByOne: + dist_code = GetCopyDistance(dist_symbol, br); + dist = PlaneCodeToDistance(width, dist_code); + if (pos >= dist && end - pos >= length) { + CopyBlock8b(data + pos, dist, length); + } else { + ok = 0; + goto End; + } + pos += length; + col += length; + while (col >= width) { + col -= width; + ++row; + if (row % NUM_ARGB_CACHE_ROWS == 0) { + ExtractPalettedAlphaRows(dec, row); + } + } + if (pos < last && (col & mask)) { + htree_group = GetHtreeGroupForPos(hdr, col, row); + } + } else { // Not reached + ok = 0; + goto End; + } + assert(br->eos_ == VP8LIsEndOfStream(br)); + } + // Process the remaining rows corresponding to last row-block. + ExtractPalettedAlphaRows(dec, row); + + End: + if (!ok || (br->eos_ && pos < end)) { + ok = 0; + dec->status_ = br->eos_ ? VP8_STATUS_SUSPENDED + : VP8_STATUS_BITSTREAM_ERROR; + } else { + dec->last_pixel_ = pos; + } + return ok; +} + +static void SaveState(VP8LDecoder* const dec, int last_pixel) { + assert(dec->incremental_); + dec->saved_br_ = dec->br_; + dec->saved_last_pixel_ = last_pixel; + if (dec->hdr_.color_cache_size_ > 0) { + VP8LColorCacheCopy(&dec->hdr_.color_cache_, &dec->hdr_.saved_color_cache_); + } +} + +static void RestoreState(VP8LDecoder* const dec) { + assert(dec->br_.eos_); + dec->status_ = VP8_STATUS_SUSPENDED; + dec->br_ = dec->saved_br_; + dec->last_pixel_ = dec->saved_last_pixel_; + if (dec->hdr_.color_cache_size_ > 0) { + VP8LColorCacheCopy(&dec->hdr_.saved_color_cache_, &dec->hdr_.color_cache_); + } +} + +#define SYNC_EVERY_N_ROWS 8 // minimum number of rows between check-points +static int DecodeImageData(VP8LDecoder* const dec, uint32_t* const data, + int width, int height, int last_row, + ProcessRowsFunc process_func) { + int row = dec->last_pixel_ / width; + int col = dec->last_pixel_ % width; + VP8LBitReader* const br = &dec->br_; + VP8LMetadata* const hdr = &dec->hdr_; + HTreeGroup* htree_group = GetHtreeGroupForPos(hdr, col, row); + uint32_t* src = data + dec->last_pixel_; + uint32_t* last_cached = src; + uint32_t* const src_end = data + width * height; // End of data + uint32_t* const src_last = data + width * last_row; // Last pixel to decode + const int len_code_limit = NUM_LITERAL_CODES + NUM_LENGTH_CODES; + const int color_cache_limit = len_code_limit + hdr->color_cache_size_; + int next_sync_row = dec->incremental_ ? row : 1 << 24; + VP8LColorCache* const color_cache = + (hdr->color_cache_size_ > 0) ? &hdr->color_cache_ : NULL; + const int mask = hdr->huffman_mask_; + assert(htree_group != NULL); + assert(src < src_end); + assert(src_last <= src_end); + + while (src < src_last) { + int code; + if (row >= next_sync_row) { + SaveState(dec, (int)(src - data)); + next_sync_row = row + SYNC_EVERY_N_ROWS; + } + // Only update when changing tile. Note we could use this test: + // if "((((prev_col ^ col) | prev_row ^ row)) > mask)" -> tile changed + // but that's actually slower and needs storing the previous col/row. + if ((col & mask) == 0) htree_group = GetHtreeGroupForPos(hdr, col, row); + if (htree_group->is_trivial_code) { + *src = htree_group->literal_arb; + goto AdvanceByOne; + } + VP8LFillBitWindow(br); + if (htree_group->use_packed_table) { + code = ReadPackedSymbols(htree_group, br, src); + if (code == PACKED_NON_LITERAL_CODE) goto AdvanceByOne; + } else { + code = ReadSymbol(htree_group->htrees[GREEN], br); + } + if (br->eos_) break; // early out + if (code < NUM_LITERAL_CODES) { // Literal + if (htree_group->is_trivial_literal) { + *src = htree_group->literal_arb | (code << 8); + } else { + int red, blue, alpha; + red = ReadSymbol(htree_group->htrees[RED], br); + VP8LFillBitWindow(br); + blue = ReadSymbol(htree_group->htrees[BLUE], br); + alpha = ReadSymbol(htree_group->htrees[ALPHA], br); + if (br->eos_) break; + *src = ((uint32_t)alpha << 24) | (red << 16) | (code << 8) | blue; + } + AdvanceByOne: ++src; ++col; if (col >= width) { col = 0; ++row; - if ((process_func != NULL) && (row % NUM_ARGB_CACHE_ROWS == 0)) { + if ((row % NUM_ARGB_CACHE_ROWS == 0) && (process_func != NULL)) { process_func(dec, row); } if (color_cache != NULL) { @@ -728,40 +1089,39 @@ static int DecodeImageData(VP8LDecoder* const dec, } } } - } else if (code < len_code_limit) { // Backward reference + } else if (code < len_code_limit) { // Backward reference int dist_code, dist; const int length_sym = code - NUM_LITERAL_CODES; const int length = GetCopyLength(length_sym, br); - const int dist_symbol = ReadSymbol(&htree_group->htrees_[DIST], br); + const int dist_symbol = ReadSymbol(htree_group->htrees[DIST], br); VP8LFillBitWindow(br); dist_code = GetCopyDistance(dist_symbol, br); dist = PlaneCodeToDistance(width, dist_code); - if (src - data < dist || src_end - src < length) { - ok = 0; - goto End; - } - { - int i; - for (i = 0; i < length; ++i) src[i] = src[i - dist]; - src += length; + if (br->eos_) break; + if (src - data < (ptrdiff_t)dist || src_end - src < (ptrdiff_t)length) { + goto Error; + } else { + CopyBlock32b(src, dist, length); } + src += length; col += length; while (col >= width) { col -= width; ++row; - if ((process_func != NULL) && (row % NUM_ARGB_CACHE_ROWS == 0)) { + if ((row % NUM_ARGB_CACHE_ROWS == 0) && (process_func != NULL)) { process_func(dec, row); } } - if (src < src_end) { - htree_group = GetHtreeGroupForPos(hdr, col, row); - if (color_cache != NULL) { - while (last_cached < src) { - VP8LColorCacheInsert(color_cache, *last_cached++); - } + // Because of the check done above (before 'src' was incremented by + // 'length'), the following holds true. + assert(src <= src_end); + if (col & mask) htree_group = GetHtreeGroupForPos(hdr, col, row); + if (color_cache != NULL) { + while (last_cached < src) { + VP8LColorCacheInsert(color_cache, *last_cached++); } } - } else if (code < color_cache_limit) { // Color cache. + } else if (code < color_cache_limit) { // Color cache const int key = code - len_code_limit; assert(color_cache != NULL); while (last_cached < src) { @@ -769,33 +1129,38 @@ static int DecodeImageData(VP8LDecoder* const dec, } *src = VP8LColorCacheLookup(color_cache, key); goto AdvanceByOne; - } else { // Not reached. - ok = 0; - goto End; + } else { // Not reached + goto Error; } - ok = !br->error_; - if (!ok) goto End; + assert(br->eos_ == VP8LIsEndOfStream(br)); } - // Process the remaining rows corresponding to last row-block. - if (process_func != NULL) process_func(dec, row); - End: - if (br->error_ || !ok || (br->eos_ && src < src_end)) { - ok = 0; - dec->status_ = (!br->eos_) ? - VP8_STATUS_BITSTREAM_ERROR : VP8_STATUS_SUSPENDED; - } else if (src == src_end) { - dec->state_ = READ_DATA; + if (dec->incremental_ && br->eos_ && src < src_end) { + RestoreState(dec); + } else if (!br->eos_) { + // Process the remaining rows corresponding to last row-block. + if (process_func != NULL) { + process_func(dec, row); + } + dec->status_ = VP8_STATUS_OK; + dec->last_pixel_ = (int)(src - data); // end-of-scan marker + } else { + // if not incremental, and we are past the end of buffer (eos_=1), then this + // is a real bitstream error. + goto Error; } + return 1; - return ok; + Error: + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + return 0; } // ----------------------------------------------------------------------------- // VP8LTransform static void ClearTransform(VP8LTransform* const transform) { - free(transform->data_); + WebPSafeFree(transform->data_); transform->data_ = NULL; } @@ -819,7 +1184,7 @@ static int ExpandColorMap(int num_colors, VP8LTransform* const transform) { } for (; i < 4 * final_num_colors; ++i) new_data[i] = 0; // black tail. - free(transform->data_); + WebPSafeFree(transform->data_); transform->data_ = new_color_map; } return 1; @@ -882,16 +1247,18 @@ static int ReadTransform(int* const xsize, int const* ysize, // VP8LMetadata static void InitMetadata(VP8LMetadata* const hdr) { - assert(hdr); + assert(hdr != NULL); memset(hdr, 0, sizeof(*hdr)); } static void ClearMetadata(VP8LMetadata* const hdr) { - assert(hdr); + assert(hdr != NULL); - free(hdr->huffman_image_); - DeleteHtreeGroups(hdr->htree_groups_, hdr->num_htree_groups_); + WebPSafeFree(hdr->huffman_image_); + WebPSafeFree(hdr->huffman_tables_); + VP8LHtreeGroupsFree(hdr->htree_groups_); VP8LColorCacheClear(&hdr->color_cache_); + VP8LColorCacheClear(&hdr->saved_color_cache_); InitMetadata(hdr); } @@ -899,11 +1266,13 @@ static void ClearMetadata(VP8LMetadata* const hdr) { // VP8LDecoder VP8LDecoder* VP8LNew(void) { - VP8LDecoder* const dec = (VP8LDecoder*)calloc(1, sizeof(*dec)); + VP8LDecoder* const dec = (VP8LDecoder*)WebPSafeCalloc(1ULL, sizeof(*dec)); if (dec == NULL) return NULL; dec->status_ = VP8_STATUS_OK; - dec->action_ = READ_DIM; dec->state_ = READ_DIM; + + VP8LDspInit(); // Init critical function pointers. + return dec; } @@ -912,15 +1281,15 @@ void VP8LClear(VP8LDecoder* const dec) { if (dec == NULL) return; ClearMetadata(&dec->hdr_); - free(dec->argb_); - dec->argb_ = NULL; + WebPSafeFree(dec->pixels_); + dec->pixels_ = NULL; for (i = 0; i < dec->next_transform_; ++i) { ClearTransform(&dec->transforms_[i]); } dec->next_transform_ = 0; dec->transforms_seen_ = 0; - free(dec->rescaler_memory); + WebPSafeFree(dec->rescaler_memory); dec->rescaler_memory = NULL; dec->output_ = NULL; // leave no trace behind @@ -929,7 +1298,7 @@ void VP8LClear(VP8LDecoder* const dec) { void VP8LDelete(VP8LDecoder* const dec) { if (dec != NULL) { VP8LClear(dec); - free(dec); + WebPSafeFree(dec); } } @@ -1009,19 +1378,14 @@ static int DecodeImageStream(int xsize, int ysize, } // Use the Huffman trees to decode the LZ77 encoded data. - ok = DecodeImageData(dec, data, transform_xsize, transform_ysize, NULL); - ok = ok && !br->error_; + ok = DecodeImageData(dec, data, transform_xsize, transform_ysize, + transform_ysize, NULL); + ok = ok && !br->eos_; End: - if (!ok) { - free(data); + WebPSafeFree(data); ClearMetadata(hdr); - // If not enough data (br.eos_) resulted in BIT_STREAM_ERROR, update the - // status appropriately. - if (dec->status_ == VP8_STATUS_BITSTREAM_ERROR && dec->br_.eos_) { - dec->status_ = VP8_STATUS_SUSPENDED; - } } else { if (decoded_data != NULL) { *decoded_data = data; @@ -1031,41 +1395,52 @@ static int DecodeImageStream(int xsize, int ysize, assert(data == NULL); assert(is_level0); } + dec->last_pixel_ = 0; // Reset for future DECODE_DATA_FUNC() calls. if (!is_level0) ClearMetadata(hdr); // Clean up temporary data behind. } return ok; } //------------------------------------------------------------------------------ -// Allocate dec->argb_ and dec->argb_cache_ using dec->width_ and dec->height_ - -static int AllocateARGBBuffers(VP8LDecoder* const dec, int final_width) { +// Allocate internal buffers dec->pixels_ and dec->argb_cache_. +static int AllocateInternalBuffers32b(VP8LDecoder* const dec, int final_width) { const uint64_t num_pixels = (uint64_t)dec->width_ * dec->height_; // Scratch buffer corresponding to top-prediction row for transforming the - // first row in the row-blocks. - const uint64_t cache_top_pixels = final_width; - // Scratch buffer for temporary BGRA storage. + // first row in the row-blocks. Not needed for paletted alpha. + const uint64_t cache_top_pixels = (uint16_t)final_width; + // Scratch buffer for temporary BGRA storage. Not needed for paletted alpha. const uint64_t cache_pixels = (uint64_t)final_width * NUM_ARGB_CACHE_ROWS; const uint64_t total_num_pixels = num_pixels + cache_top_pixels + cache_pixels; assert(dec->width_ <= final_width); - dec->argb_ = (uint32_t*)WebPSafeMalloc(total_num_pixels, sizeof(*dec->argb_)); - if (dec->argb_ == NULL) { + dec->pixels_ = (uint32_t*)WebPSafeMalloc(total_num_pixels, sizeof(uint32_t)); + if (dec->pixels_ == NULL) { dec->argb_cache_ = NULL; // for sanity check dec->status_ = VP8_STATUS_OUT_OF_MEMORY; return 0; } - dec->argb_cache_ = dec->argb_ + num_pixels + cache_top_pixels; + dec->argb_cache_ = dec->pixels_ + num_pixels + cache_top_pixels; + return 1; +} + +static int AllocateInternalBuffers8b(VP8LDecoder* const dec) { + const uint64_t total_num_pixels = (uint64_t)dec->width_ * dec->height_; + dec->argb_cache_ = NULL; // for sanity check + dec->pixels_ = (uint32_t*)WebPSafeMalloc(total_num_pixels, sizeof(uint8_t)); + if (dec->pixels_ == NULL) { + dec->status_ = VP8_STATUS_OUT_OF_MEMORY; + return 0; + } return 1; } //------------------------------------------------------------------------------ -// Special row-processing that only stores the alpha data. +// Special row-processing that only stores the alpha data. static void ExtractAlphaRows(VP8LDecoder* const dec, int row) { const int num_rows = row - dec->last_row_; - const uint32_t* const in = dec->argb_ + dec->width_ * dec->last_row_; + const uint32_t* const in = dec->pixels_ + dec->width_ * dec->last_row_; if (num_rows <= 0) return; // Nothing to be done. ApplyInverseTransforms(dec, num_rows, in); @@ -1079,44 +1454,77 @@ static void ExtractAlphaRows(VP8LDecoder* const dec, int row) { int i; for (i = 0; i < cache_pixs; ++i) dst[i] = (src[i] >> 8) & 0xff; } - dec->last_row_ = dec->last_out_row_ = row; } -int VP8LDecodeAlphaImageStream(int width, int height, const uint8_t* const data, - size_t data_size, uint8_t* const output) { - VP8Io io; +int VP8LDecodeAlphaHeader(ALPHDecoder* const alph_dec, + const uint8_t* const data, size_t data_size, + uint8_t* const output) { int ok = 0; - VP8LDecoder* const dec = VP8LNew(); - if (dec == NULL) return 0; - - dec->width_ = width; - dec->height_ = height; - dec->io_ = &io; + VP8LDecoder* dec; + VP8Io* io; + assert(alph_dec != NULL); + alph_dec->vp8l_dec_ = VP8LNew(); + if (alph_dec->vp8l_dec_ == NULL) return 0; + dec = alph_dec->vp8l_dec_; + + dec->width_ = alph_dec->width_; + dec->height_ = alph_dec->height_; + dec->io_ = &alph_dec->io_; + io = dec->io_; - VP8InitIo(&io); - WebPInitCustomIo(NULL, &io); // Just a sanity Init. io won't be used. - io.opaque = output; - io.width = width; - io.height = height; + VP8InitIo(io); + WebPInitCustomIo(NULL, io); // Just a sanity Init. io won't be used. + io->opaque = output; + io->width = alph_dec->width_; + io->height = alph_dec->height_; dec->status_ = VP8_STATUS_OK; VP8LInitBitReader(&dec->br_, data, data_size); - dec->action_ = READ_HDR; - if (!DecodeImageStream(width, height, 1, dec, NULL)) goto Err; + if (!DecodeImageStream(alph_dec->width_, alph_dec->height_, 1, dec, NULL)) { + goto Err; + } - // Allocate output (note that dec->width_ may have changed here). - if (!AllocateARGBBuffers(dec, width)) goto Err; + // Special case: if alpha data uses only the color indexing transform and + // doesn't use color cache (a frequent case), we will use DecodeAlphaData() + // method that only needs allocation of 1 byte per pixel (alpha channel). + if (dec->next_transform_ == 1 && + dec->transforms_[0].type_ == COLOR_INDEXING_TRANSFORM && + Is8bOptimizable(&dec->hdr_)) { + alph_dec->use_8b_decode = 1; + ok = AllocateInternalBuffers8b(dec); + } else { + // Allocate internal buffers (note that dec->width_ may have changed here). + alph_dec->use_8b_decode = 0; + ok = AllocateInternalBuffers32b(dec, alph_dec->width_); + } - // Decode (with special row processing). - dec->action_ = READ_DATA; - ok = DecodeImageData(dec, dec->argb_, dec->width_, dec->height_, - ExtractAlphaRows); + if (!ok) goto Err; + + return 1; Err: - VP8LDelete(dec); - return ok; + VP8LDelete(alph_dec->vp8l_dec_); + alph_dec->vp8l_dec_ = NULL; + return 0; +} + +int VP8LDecodeAlphaImageStream(ALPHDecoder* const alph_dec, int last_row) { + VP8LDecoder* const dec = alph_dec->vp8l_dec_; + assert(dec != NULL); + assert(last_row <= dec->height_); + + if (dec->last_pixel_ == dec->width_ * dec->height_) { + return 1; // done + } + + // Decode (with special row processing). + return alph_dec->use_8b_decode ? + DecodeAlphaData(dec, (uint8_t*)dec->pixels_, dec->width_, dec->height_, + last_row) : + DecodeImageData(dec, dec->pixels_, dec->width_, dec->height_, + last_row, ExtractAlphaRows); } //------------------------------------------------------------------------------ @@ -1141,14 +1549,13 @@ int VP8LDecodeHeader(VP8LDecoder* const dec, VP8Io* const io) { io->width = width; io->height = height; - dec->action_ = READ_HDR; if (!DecodeImageStream(width, height, 1, dec, NULL)) goto Error; return 1; Error: - VP8LClear(dec); - assert(dec->status_ != VP8_STATUS_OK); - return 0; + VP8LClear(dec); + assert(dec->status_ != VP8_STATUS_OK); + return 0; } int VP8LDecodeImage(VP8LDecoder* const dec) { @@ -1158,33 +1565,57 @@ int VP8LDecodeImage(VP8LDecoder* const dec) { // Sanity checks. if (dec == NULL) return 0; + assert(dec->hdr_.huffman_tables_ != NULL); + assert(dec->hdr_.htree_groups_ != NULL); + assert(dec->hdr_.num_htree_groups_ > 0); + io = dec->io_; assert(io != NULL); params = (WebPDecParams*)io->opaque; assert(params != NULL); - dec->output_ = params->output; - assert(dec->output_ != NULL); // Initialization. - if (!WebPIoInitFromOptions(params->options, io, MODE_BGRA)) { - dec->status_ = VP8_STATUS_INVALID_PARAM; - goto Err; - } + if (dec->state_ != READ_DATA) { + dec->output_ = params->output; + assert(dec->output_ != NULL); + + if (!WebPIoInitFromOptions(params->options, io, MODE_BGRA)) { + dec->status_ = VP8_STATUS_INVALID_PARAM; + goto Err; + } - if (!AllocateARGBBuffers(dec, io->width)) goto Err; + if (!AllocateInternalBuffers32b(dec, io->width)) goto Err; - if (io->use_scaling && !AllocateAndInitRescaler(dec, io)) goto Err; + if (io->use_scaling && !AllocateAndInitRescaler(dec, io)) goto Err; + + if (io->use_scaling || WebPIsPremultipliedMode(dec->output_->colorspace)) { + // need the alpha-multiply functions for premultiplied output or rescaling + WebPInitAlphaProcessing(); + } + if (!WebPIsRGBMode(dec->output_->colorspace)) { + WebPInitConvertARGBToYUV(); + if (dec->output_->u.YUVA.a != NULL) WebPInitAlphaProcessing(); + } + if (dec->incremental_) { + if (dec->hdr_.color_cache_size_ > 0 && + dec->hdr_.saved_color_cache_.colors_ == NULL) { + if (!VP8LColorCacheInit(&dec->hdr_.saved_color_cache_, + dec->hdr_.color_cache_.hash_bits_)) { + dec->status_ = VP8_STATUS_OUT_OF_MEMORY; + goto Err; + } + } + } + dec->state_ = READ_DATA; + } // Decode. - dec->action_ = READ_DATA; - if (!DecodeImageData(dec, dec->argb_, dec->width_, dec->height_, - ProcessRows)) { + if (!DecodeImageData(dec, dec->pixels_, dec->width_, dec->height_, + dec->height_, ProcessRows)) { goto Err; } - // Cleanup. params->last_y = dec->last_out_row_; - VP8LClear(dec); return 1; Err: @@ -1194,7 +1625,3 @@ int VP8LDecodeImage(VP8LDecoder* const dec) { } //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/vp8li.h b/drivers/webp/dec/vp8li.h index 5f6cd6a01c..8886e47f62 100644 --- a/drivers/webp/dec/vp8li.h +++ b/drivers/webp/dec/vp8li.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Lossless decoder: internal header. @@ -18,9 +20,8 @@ #include "../utils/bit_reader.h" #include "../utils/color_cache.h" #include "../utils/huffman.h" -#include "../format_constants.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -40,12 +41,9 @@ struct VP8LTransform { }; typedef struct { - HuffmanTree htrees_[HUFFMAN_CODES_PER_META_CODE]; -} HTreeGroup; - -typedef struct { int color_cache_size_; VP8LColorCache color_cache_; + VP8LColorCache saved_color_cache_; // for incremental int huffman_mask_; int huffman_subsample_bits_; @@ -53,24 +51,32 @@ typedef struct { uint32_t *huffman_image_; int num_htree_groups_; HTreeGroup *htree_groups_; + HuffmanCode *huffman_tables_; } VP8LMetadata; -typedef struct { +typedef struct VP8LDecoder VP8LDecoder; +struct VP8LDecoder { VP8StatusCode status_; - VP8LDecodeState action_; VP8LDecodeState state_; VP8Io *io_; const WebPDecBuffer *output_; // shortcut to io->opaque->output - uint32_t *argb_; // Internal data: always in BGRA color mode. + uint32_t *pixels_; // Internal data: either uint8_t* for alpha + // or uint32_t* for BGRA. uint32_t *argb_cache_; // Scratch buffer for temporary BGRA storage. VP8LBitReader br_; + int incremental_; // if true, incremental decoding is expected + VP8LBitReader saved_br_; // note: could be local variables too + int saved_last_pixel_; int width_; int height_; int last_row_; // last input row decoded so far. + int last_pixel_; // last pixel decoded so far. However, it may + // not be transformed, scaled and + // color-converted yet. int last_out_row_; // last row output so far. VP8LMetadata hdr_; @@ -82,18 +88,27 @@ typedef struct { uint8_t *rescaler_memory; // Working memory for rescaling work. WebPRescaler *rescaler; // Common rescaler for all channels. -} VP8LDecoder; +}; //------------------------------------------------------------------------------ // internal functions. Not public. +struct ALPHDecoder; // Defined in dec/alphai.h. + // in vp8l.c -// Decodes a raw image stream (without header) and store the alpha data -// into *output, which must be of size width x height. Returns false in case -// of error. -int VP8LDecodeAlphaImageStream(int width, int height, const uint8_t* const data, - size_t data_size, uint8_t* const output); +// Decodes image header for alpha data stored using lossless compression. +// Returns false in case of error. +int VP8LDecodeAlphaHeader(struct ALPHDecoder* const alph_dec, + const uint8_t* const data, size_t data_size, + uint8_t* const output); + +// Decodes *at least* 'last_row' rows of alpha. If some of the initial rows are +// already decoded in previous call(s), it will resume decoding from where it +// was paused. +// Returns false in case of bitstream error. +int VP8LDecodeAlphaImageStream(struct ALPHDecoder* const alph_dec, + int last_row); // Allocates and initialize a new lossless decoder instance. VP8LDecoder* VP8LNew(void); @@ -114,7 +129,7 @@ void VP8LDelete(VP8LDecoder* const dec); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/dec/webp.c b/drivers/webp/dec/webp.c index f44bc2b8ae..952178fa89 100644 --- a/drivers/webp/dec/webp.c +++ b/drivers/webp/dec/webp.c @@ -1,8 +1,10 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Main decoding functions for WEBP images. @@ -14,11 +16,8 @@ #include "./vp8i.h" #include "./vp8li.h" #include "./webpi.h" -#include "../format_constants.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "../utils/utils.h" +#include "../webp/mux_types.h" // ALPHA_FLAG //------------------------------------------------------------------------------ // RIFF layout is: @@ -40,27 +39,20 @@ extern "C" { // 20..23 VP8X flags bit-map corresponding to the chunk-types present. // 24..26 Width of the Canvas Image. // 27..29 Height of the Canvas Image. -// There can be extra chunks after the "VP8X" chunk (ICCP, TILE, FRM, VP8, -// META ...) +// There can be extra chunks after the "VP8X" chunk (ICCP, FRGM, ANMF, VP8, +// VP8L, XMP, EXIF ...) // All sizes are in little-endian order. // Note: chunk data size must be padded to multiple of 2 when written. -static WEBP_INLINE uint32_t get_le24(const uint8_t* const data) { - return data[0] | (data[1] << 8) | (data[2] << 16); -} - -static WEBP_INLINE uint32_t get_le32(const uint8_t* const data) { - return (uint32_t)get_le24(data) | (data[3] << 24); -} - // Validates the RIFF container (if detected) and skips over it. -// If a RIFF container is detected, -// Returns VP8_STATUS_BITSTREAM_ERROR for invalid header, and -// VP8_STATUS_OK otherwise. +// If a RIFF container is detected, returns: +// VP8_STATUS_BITSTREAM_ERROR for invalid header, +// VP8_STATUS_NOT_ENOUGH_DATA for truncated data if have_all_data is true, +// and VP8_STATUS_OK otherwise. // In case there are not enough bytes (partial RIFF container), return 0 for // *riff_size. Else return the RIFF size extracted from the header. static VP8StatusCode ParseRIFF(const uint8_t** const data, - size_t* const data_size, + size_t* const data_size, int have_all_data, size_t* const riff_size) { assert(data != NULL); assert(data_size != NULL); @@ -71,11 +63,17 @@ static VP8StatusCode ParseRIFF(const uint8_t** const data, if (memcmp(*data + 8, "WEBP", TAG_SIZE)) { return VP8_STATUS_BITSTREAM_ERROR; // Wrong image file signature. } else { - const uint32_t size = get_le32(*data + TAG_SIZE); + const uint32_t size = GetLE32(*data + TAG_SIZE); // Check that we have at least one chunk (i.e "WEBP" + "VP8?nnnn"). if (size < TAG_SIZE + CHUNK_HEADER_SIZE) { return VP8_STATUS_BITSTREAM_ERROR; } + if (size > MAX_CHUNK_PAYLOAD) { + return VP8_STATUS_BITSTREAM_ERROR; + } + if (have_all_data && (size > *data_size - CHUNK_HEADER_SIZE)) { + return VP8_STATUS_NOT_ENOUGH_DATA; // Truncated bitstream. + } // We have a RIFF container. Skip it. *riff_size = size; *data += RIFF_HEADER_SIZE; @@ -111,7 +109,7 @@ static VP8StatusCode ParseVP8X(const uint8_t** const data, if (!memcmp(*data, "VP8X", TAG_SIZE)) { int width, height; uint32_t flags; - const uint32_t chunk_size = get_le32(*data + TAG_SIZE); + const uint32_t chunk_size = GetLE32(*data + TAG_SIZE); if (chunk_size != VP8X_CHUNK_SIZE) { return VP8_STATUS_BITSTREAM_ERROR; // Wrong chunk size. } @@ -120,9 +118,9 @@ static VP8StatusCode ParseVP8X(const uint8_t** const data, if (*data_size < vp8x_size) { return VP8_STATUS_NOT_ENOUGH_DATA; // Insufficient data. } - flags = get_le32(*data + 8); - width = 1 + get_le24(*data + 12); - height = 1 + get_le24(*data + 15); + flags = GetLE32(*data + 8); + width = 1 + GetLE24(*data + 12); + height = 1 + GetLE24(*data + 15); if (width * (uint64_t)height >= MAX_IMAGE_AREA) { return VP8_STATUS_BITSTREAM_ERROR; // image is too large } @@ -176,7 +174,10 @@ static VP8StatusCode ParseOptionalChunks(const uint8_t** const data, return VP8_STATUS_NOT_ENOUGH_DATA; } - chunk_size = get_le32(buf + TAG_SIZE); + chunk_size = GetLE32(buf + TAG_SIZE); + if (chunk_size > MAX_CHUNK_PAYLOAD) { + return VP8_STATUS_BITSTREAM_ERROR; // Not a valid chunk size. + } // For odd-sized chunk-payload, there's one byte padding at the end. disk_chunk_size = (CHUNK_HEADER_SIZE + chunk_size + 1) & ~1; total_size += disk_chunk_size; @@ -186,6 +187,15 @@ static VP8StatusCode ParseOptionalChunks(const uint8_t** const data, return VP8_STATUS_BITSTREAM_ERROR; // Not a valid chunk size. } + // Start of a (possibly incomplete) VP8/VP8L chunk implies that we have + // parsed all the optional chunks. + // Note: This check must occur before the check 'buf_size < disk_chunk_size' + // below to allow incomplete VP8/VP8L chunks. + if (!memcmp(buf, "VP8 ", TAG_SIZE) || + !memcmp(buf, "VP8L", TAG_SIZE)) { + return VP8_STATUS_OK; + } + if (buf_size < disk_chunk_size) { // Insufficient data. return VP8_STATUS_NOT_ENOUGH_DATA; } @@ -193,9 +203,6 @@ static VP8StatusCode ParseOptionalChunks(const uint8_t** const data, if (!memcmp(buf, "ALPH", TAG_SIZE)) { // A valid ALPH header. *alpha_data = buf + CHUNK_HEADER_SIZE; *alpha_size = chunk_size; - } else if (!memcmp(buf, "VP8 ", TAG_SIZE) || - !memcmp(buf, "VP8L", TAG_SIZE)) { // A valid VP8/VP8L header. - return VP8_STATUS_OK; // Found. } // We have a full and valid chunk; skip it. @@ -213,9 +220,8 @@ static VP8StatusCode ParseOptionalChunks(const uint8_t** const data, // extracted from the VP8/VP8L chunk header. // The flag '*is_lossless' is set to 1 in case of VP8L chunk / raw VP8L data. static VP8StatusCode ParseVP8Header(const uint8_t** const data_ptr, - size_t* const data_size, - size_t riff_size, - size_t* const chunk_size, + size_t* const data_size, int have_all_data, + size_t riff_size, size_t* const chunk_size, int* const is_lossless) { const uint8_t* const data = *data_ptr; const int is_vp8 = !memcmp(data, "VP8 ", TAG_SIZE); @@ -234,10 +240,13 @@ static VP8StatusCode ParseVP8Header(const uint8_t** const data_ptr, if (is_vp8 || is_vp8l) { // Bitstream contains VP8/VP8L header. - const uint32_t size = get_le32(data + TAG_SIZE); + const uint32_t size = GetLE32(data + TAG_SIZE); if ((riff_size >= minimal_size) && (size > riff_size - minimal_size)) { return VP8_STATUS_BITSTREAM_ERROR; // Inconsistent size information. } + if (have_all_data && (size > *data_size - CHUNK_HEADER_SIZE)) { + return VP8_STATUS_NOT_ENOUGH_DATA; // Truncated bitstream. + } // Skip over CHUNK_HEADER_SIZE bytes from VP8/VP8L Header. *chunk_size = size; *data_ptr += CHUNK_HEADER_SIZE; @@ -270,9 +279,19 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, int* const width, int* const height, int* const has_alpha, + int* const has_animation, + int* const format, WebPHeaderStructure* const headers) { + int canvas_width = 0; + int canvas_height = 0; + int image_width = 0; + int image_height = 0; int found_riff = 0; int found_vp8x = 0; + int animation_present = 0; + int fragments_present = 0; + const int have_all_data = (headers != NULL) ? headers->have_all_data : 0; + VP8StatusCode status; WebPHeaderStructure hdrs; @@ -284,7 +303,7 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, hdrs.data_size = data_size; // Skip over RIFF header. - status = ParseRIFF(&data, &data_size, &hdrs.riff_size); + status = ParseRIFF(&data, &data_size, have_all_data, &hdrs.riff_size); if (status != VP8_STATUS_OK) { return status; // Wrong RIFF header / insufficient data. } @@ -293,22 +312,35 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, // Skip over VP8X. { uint32_t flags = 0; - status = ParseVP8X(&data, &data_size, &found_vp8x, width, height, &flags); + status = ParseVP8X(&data, &data_size, &found_vp8x, + &canvas_width, &canvas_height, &flags); if (status != VP8_STATUS_OK) { return status; // Wrong VP8X / insufficient data. } + animation_present = !!(flags & ANIMATION_FLAG); + fragments_present = !!(flags & FRAGMENTS_FLAG); if (!found_riff && found_vp8x) { // Note: This restriction may be removed in the future, if it becomes // necessary to send VP8X chunk to the decoder. return VP8_STATUS_BITSTREAM_ERROR; } - if (has_alpha != NULL) *has_alpha = !!(flags & ALPHA_FLAG_BIT); - if (found_vp8x && headers == NULL) { - return VP8_STATUS_OK; // Return features from VP8X header. + if (has_alpha != NULL) *has_alpha = !!(flags & ALPHA_FLAG); + if (has_animation != NULL) *has_animation = animation_present; + if (format != NULL) *format = 0; // default = undefined + + image_width = canvas_width; + image_height = canvas_height; + if (found_vp8x && (animation_present || fragments_present) && + headers == NULL) { + status = VP8_STATUS_OK; + goto ReturnWidthHeight; // Just return features from VP8X header. } } - if (data_size < TAG_SIZE) return VP8_STATUS_NOT_ENOUGH_DATA; + if (data_size < TAG_SIZE) { + status = VP8_STATUS_NOT_ENOUGH_DATA; + goto ReturnWidthHeight; + } // Skip over optional chunks if data started with "RIFF + VP8X" or "ALPH". if ((found_riff && found_vp8x) || @@ -316,43 +348,49 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, status = ParseOptionalChunks(&data, &data_size, hdrs.riff_size, &hdrs.alpha_data, &hdrs.alpha_data_size); if (status != VP8_STATUS_OK) { - return status; // Found an invalid chunk size / insufficient data. + goto ReturnWidthHeight; // Invalid chunk size / insufficient data. } } // Skip over VP8/VP8L header. - status = ParseVP8Header(&data, &data_size, hdrs.riff_size, + status = ParseVP8Header(&data, &data_size, have_all_data, hdrs.riff_size, &hdrs.compressed_size, &hdrs.is_lossless); if (status != VP8_STATUS_OK) { - return status; // Wrong VP8/VP8L chunk-header / insufficient data. + goto ReturnWidthHeight; // Wrong VP8/VP8L chunk-header / insufficient data. } if (hdrs.compressed_size > MAX_CHUNK_PAYLOAD) { return VP8_STATUS_BITSTREAM_ERROR; } + if (format != NULL && !(animation_present || fragments_present)) { + *format = hdrs.is_lossless ? 2 : 1; + } + if (!hdrs.is_lossless) { if (data_size < VP8_FRAME_HEADER_SIZE) { - return VP8_STATUS_NOT_ENOUGH_DATA; + status = VP8_STATUS_NOT_ENOUGH_DATA; + goto ReturnWidthHeight; } // Validates raw VP8 data. - if (!VP8GetInfo(data, data_size, - (uint32_t)hdrs.compressed_size, width, height)) { + if (!VP8GetInfo(data, data_size, (uint32_t)hdrs.compressed_size, + &image_width, &image_height)) { return VP8_STATUS_BITSTREAM_ERROR; } } else { if (data_size < VP8L_FRAME_HEADER_SIZE) { - return VP8_STATUS_NOT_ENOUGH_DATA; + status = VP8_STATUS_NOT_ENOUGH_DATA; + goto ReturnWidthHeight; } // Validates raw VP8L data. - if (!VP8LGetInfo(data, data_size, width, height, has_alpha)) { + if (!VP8LGetInfo(data, data_size, &image_width, &image_height, has_alpha)) { return VP8_STATUS_BITSTREAM_ERROR; } } - - if (has_alpha != NULL) { - // If the data did not contain a VP8X/VP8L chunk the only definitive way - // to set this is by looking for alpha data (from an ALPH chunk). - *has_alpha |= (hdrs.alpha_data != NULL); + // Validates image size coherency. + if (found_vp8x) { + if (canvas_width != image_width || canvas_height != image_height) { + return VP8_STATUS_BITSTREAM_ERROR; + } } if (headers != NULL) { *headers = hdrs; @@ -360,21 +398,44 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, assert((uint64_t)(data - headers->data) < MAX_CHUNK_PAYLOAD); assert(headers->offset == headers->data_size - data_size); } - return VP8_STATUS_OK; // Return features from VP8 header. + ReturnWidthHeight: + if (status == VP8_STATUS_OK || + (status == VP8_STATUS_NOT_ENOUGH_DATA && found_vp8x && headers == NULL)) { + if (has_alpha != NULL) { + // If the data did not contain a VP8X/VP8L chunk the only definitive way + // to set this is by looking for alpha data (from an ALPH chunk). + *has_alpha |= (hdrs.alpha_data != NULL); + } + if (width != NULL) *width = image_width; + if (height != NULL) *height = image_height; + return VP8_STATUS_OK; + } else { + return status; + } } VP8StatusCode WebPParseHeaders(WebPHeaderStructure* const headers) { + VP8StatusCode status; + int has_animation = 0; assert(headers != NULL); // fill out headers, ignore width/height/has_alpha. - return ParseHeadersInternal(headers->data, headers->data_size, - NULL, NULL, NULL, headers); + status = ParseHeadersInternal(headers->data, headers->data_size, + NULL, NULL, NULL, &has_animation, + NULL, headers); + if (status == VP8_STATUS_OK || status == VP8_STATUS_NOT_ENOUGH_DATA) { + // TODO(jzern): full support of animation frames will require API additions. + if (has_animation) { + status = VP8_STATUS_UNSUPPORTED_FEATURE; + } + } + return status; } //------------------------------------------------------------------------------ // WebPDecParams void WebPResetDecParams(WebPDecParams* const params) { - if (params) { + if (params != NULL) { memset(params, 0, sizeof(*params)); } } @@ -391,6 +452,7 @@ static VP8StatusCode DecodeInto(const uint8_t* const data, size_t data_size, headers.data = data; headers.data_size = data_size; + headers.have_all_data = 1; status = WebPParseHeaders(&headers); // Process Pre-VP8 chunks. if (status != VP8_STATUS_OK) { return status; @@ -407,11 +469,6 @@ static VP8StatusCode DecodeInto(const uint8_t* const data, size_t data_size, if (dec == NULL) { return VP8_STATUS_OUT_OF_MEMORY; } -#ifdef WEBP_USE_THREAD - dec->use_threads_ = params->options && (params->options->use_threads > 0); -#else - dec->use_threads_ = 0; -#endif dec->alpha_data_ = headers.alpha_data; dec->alpha_data_size_ = headers.alpha_data_size; @@ -423,6 +480,10 @@ static VP8StatusCode DecodeInto(const uint8_t* const data, size_t data_size, status = WebPAllocateDecBuffer(io.width, io.height, params->options, params->output); if (status == VP8_STATUS_OK) { // Decode + // This change must be done before calling VP8Decode() + dec->mt_method_ = VP8GetThreadMethod(params->options, &headers, + io.width, io.height); + VP8InitDithering(params->options, dec); if (!VP8Decode(dec, &io)) { status = dec->status_; } @@ -452,6 +513,10 @@ static VP8StatusCode DecodeInto(const uint8_t* const data, size_t data_size, if (status != VP8_STATUS_OK) { WebPFreeDecBuffer(params->output); } + + if (params->options != NULL && params->options->flip) { + status = WebPFlipBuffer(params->output); + } return status; } @@ -609,7 +674,6 @@ uint8_t* WebPDecodeYUV(const uint8_t* data, size_t data_size, static void DefaultFeatures(WebPBitstreamFeatures* const features) { assert(features != NULL); memset(features, 0, sizeof(*features)); - features->bitstream_version = 0; } static VP8StatusCode GetFeatures(const uint8_t* const data, size_t data_size, @@ -619,10 +683,11 @@ static VP8StatusCode GetFeatures(const uint8_t* const data, size_t data_size, } DefaultFeatures(features); - // Only parse enough of the data to retrieve width/height/has_alpha. + // Only parse enough of the data to retrieve the features. return ParseHeadersInternal(data, data_size, &features->width, &features->height, - &features->has_alpha, NULL); + &features->has_alpha, &features->has_animation, + &features->format, NULL); } //------------------------------------------------------------------------------ @@ -666,19 +731,13 @@ int WebPInitDecoderConfigInternal(WebPDecoderConfig* config, VP8StatusCode WebPGetFeaturesInternal(const uint8_t* data, size_t data_size, WebPBitstreamFeatures* features, int version) { - VP8StatusCode status; if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_DECODER_ABI_VERSION)) { return VP8_STATUS_INVALID_PARAM; // version mismatch } if (features == NULL) { return VP8_STATUS_INVALID_PARAM; } - - status = GetFeatures(data, data_size, features); - if (status == VP8_STATUS_NOT_ENOUGH_DATA) { - return VP8_STATUS_BITSTREAM_ERROR; // Not-enough-data treated as error. - } - return status; + return GetFeatures(data, data_size, features); } VP8StatusCode WebPDecode(const uint8_t* data, size_t data_size, @@ -722,9 +781,9 @@ int WebPIoInitFromOptions(const WebPDecoderOptions* const options, h = options->crop_height; x = options->crop_left; y = options->crop_top; - if (!WebPIsRGBMode(src_colorspace)) { // only snap for YUV420 or YUV422 + if (!WebPIsRGBMode(src_colorspace)) { // only snap for YUV420 x &= ~1; - y &= ~1; // TODO(later): only for YUV420, not YUV422. + y &= ~1; } if (x < 0 || y < 0 || w <= 0 || h <= 0 || x + w > W || y + h > H) { return 0; // out of frame boundary error @@ -740,11 +799,13 @@ int WebPIoInitFromOptions(const WebPDecoderOptions* const options, // Scaling io->use_scaling = (options != NULL) && (options->use_scaling > 0); if (io->use_scaling) { - if (options->scaled_width <= 0 || options->scaled_height <= 0) { + int scaled_width = options->scaled_width; + int scaled_height = options->scaled_height; + if (!WebPRescalerGetScaledDimensions(w, h, &scaled_width, &scaled_height)) { return 0; } - io->scaled_width = options->scaled_width; - io->scaled_height = options->scaled_height; + io->scaled_width = scaled_width; + io->scaled_height = scaled_height; } // Filter @@ -766,6 +827,3 @@ int WebPIoInitFromOptions(const WebPDecoderOptions* const options, //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dec/webpi.h b/drivers/webp/dec/webpi.h index 44e5744411..c75a2e4a5b 100644 --- a/drivers/webp/dec/webpi.h +++ b/drivers/webp/dec/webpi.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Internal header: WebP decoding parameters and custom IO on buffer @@ -12,7 +14,7 @@ #ifndef WEBP_DEC_WEBPI_H_ #define WEBP_DEC_WEBPI_H_ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -24,7 +26,10 @@ extern "C" { typedef struct WebPDecParams WebPDecParams; typedef int (*OutputFunc)(const VP8Io* const io, WebPDecParams* const p); -typedef int (*OutputRowFunc)(WebPDecParams* const p, int y_pos); +typedef int (*OutputAlphaFunc)(const VP8Io* const io, WebPDecParams* const p, + int expected_num_out_lines); +typedef int (*OutputRowFunc)(WebPDecParams* const p, int y_pos, + int max_out_lines); struct WebPDecParams { WebPDecBuffer* output; // output buffer. @@ -38,7 +43,7 @@ struct WebPDecParams { void* memory; // overall scratch memory for the output work. OutputFunc emit; // output RGB or YUV samples - OutputFunc emit_alpha; // output alpha channel + OutputAlphaFunc emit_alpha; // output alpha channel OutputRowFunc emit_alpha_row; // output one line of rescaled alpha values }; @@ -52,6 +57,7 @@ void WebPResetDecParams(WebPDecParams* const params); typedef struct { const uint8_t* data; // input buffer size_t data_size; // input buffer size + int have_all_data; // true if all data is known to be available size_t offset; // offset to main data chunk (VP8 or VP8L) const uint8_t* alpha_data; // points to alpha chunk (if present) size_t alpha_data_size; // alpha chunk size @@ -61,10 +67,10 @@ typedef struct { } WebPHeaderStructure; // Skips over all valid chunks prior to the first VP8/VP8L frame header. -// Returns VP8_STATUS_OK on success, -// VP8_STATUS_BITSTREAM_ERROR if an invalid header/chunk is found, and -// VP8_STATUS_NOT_ENOUGH_DATA if case of insufficient data. -// In 'headers', compressed_size, offset, alpha_data, alpha_size and lossless +// Returns: VP8_STATUS_OK, VP8_STATUS_BITSTREAM_ERROR (invalid header/chunk), +// VP8_STATUS_NOT_ENOUGH_DATA (partial input) or VP8_STATUS_UNSUPPORTED_FEATURE +// in the case of non-decodable features (animation for instance). +// In 'headers', compressed_size, offset, alpha_data, alpha_size, and lossless // fields are updated appropriately upon success. VP8StatusCode WebPParseHeaders(WebPHeaderStructure* const headers); @@ -91,10 +97,15 @@ int WebPIoInitFromOptions(const WebPDecoderOptions* const options, // dimension / etc.). If *options is not NULL, also verify that the options' // parameters are valid and apply them to the width/height dimensions of the // output buffer. This takes cropping / scaling / rotation into account. +// Also incorporates the options->flip flag to flip the buffer parameters if +// needed. VP8StatusCode WebPAllocateDecBuffer(int width, int height, const WebPDecoderOptions* const options, WebPDecBuffer* const buffer); +// Flip buffer vertically by negating the various strides. +VP8StatusCode WebPFlipBuffer(WebPDecBuffer* const buffer); + // Copy 'src' into 'dst' buffer, making sure 'dst' is not marked as owner of the // memory (still held by 'src'). void WebPCopyDecBuffer(const WebPDecBuffer* const src, @@ -103,11 +114,9 @@ void WebPCopyDecBuffer(const WebPDecBuffer* const src, // Copy and transfer ownership from src to dst (beware of parameter order!) void WebPGrabDecBuffer(WebPDecBuffer* const src, WebPDecBuffer* const dst); - - //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/decode.h b/drivers/webp/decode.h index 43b6c58f4f..fa4b13411d 100644 --- a/drivers/webp/decode.h +++ b/drivers/webp/decode.h @@ -1,8 +1,10 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Main decoding functions for WebP images. @@ -14,11 +16,23 @@ #include "./types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -#define WEBP_DECODER_ABI_VERSION 0x0200 // MAJOR(8b) + MINOR(8b) +#define WEBP_DECODER_ABI_VERSION 0x0207 // MAJOR(8b) + MINOR(8b) + +// Note: forward declaring enumerations is not allowed in (strict) C and C++, +// the types are left here for reference. +// typedef enum VP8StatusCode VP8StatusCode; +// typedef enum WEBP_CSP_MODE WEBP_CSP_MODE; +typedef struct WebPRGBABuffer WebPRGBABuffer; +typedef struct WebPYUVABuffer WebPYUVABuffer; +typedef struct WebPDecBuffer WebPDecBuffer; +typedef struct WebPIDecoder WebPIDecoder; +typedef struct WebPBitstreamFeatures WebPBitstreamFeatures; +typedef struct WebPDecoderOptions WebPDecoderOptions; +typedef struct WebPDecoderConfig WebPDecoderConfig; // Return the decoder's version number, packed in hexadecimal using 8bits for // each of major/minor/revision. E.g: v2.5.7 is 0x020507. @@ -34,7 +48,7 @@ WEBP_EXTERN(int) WebPGetInfo(const uint8_t* data, size_t data_size, // Decodes WebP images pointed to by 'data' and returns RGBA samples, along // with the dimensions in *width and *height. The ordering of samples in // memory is R, G, B, A, R, G, B, A... in scan order (endian-independent). -// The returned pointer should be deleted calling free(). +// The returned pointer should be deleted calling WebPFree(). // Returns NULL in case of error. WEBP_EXTERN(uint8_t*) WebPDecodeRGBA(const uint8_t* data, size_t data_size, int* width, int* height); @@ -59,9 +73,9 @@ WEBP_EXTERN(uint8_t*) WebPDecodeBGR(const uint8_t* data, size_t data_size, // Decode WebP images pointed to by 'data' to Y'UV format(*). The pointer // returned is the Y samples buffer. Upon return, *u and *v will point to -// the U and V chroma data. These U and V buffers need NOT be free()'d, -// unlike the returned Y luma one. The dimension of the U and V planes -// are both (*width + 1) / 2 and (*height + 1)/ 2. +// the U and V chroma data. These U and V buffers need NOT be passed to +// WebPFree(), unlike the returned Y luma one. The dimension of the U and V +// planes are both (*width + 1) / 2 and (*height + 1)/ 2. // Upon return, the Y buffer has a stride returned as '*stride', while U and V // have a common stride returned as '*uv_stride'. // Return NULL in case of error. @@ -71,6 +85,9 @@ WEBP_EXTERN(uint8_t*) WebPDecodeYUV(const uint8_t* data, size_t data_size, uint8_t** u, uint8_t** v, int* stride, int* uv_stride); +// Releases memory returned by the WebPDecode*() functions above. +WEBP_EXTERN(void) WebPFree(void* ptr); + // These five functions are variants of the above ones, that decode the image // directly into a pre-allocated buffer 'output_buffer'. The maximum storage // available in this buffer is indicated by 'output_buffer_size'. If this @@ -118,20 +135,28 @@ WEBP_EXTERN(uint8_t*) WebPDecodeYUVInto( // Note: the naming describes the byte-ordering of packed samples in memory. // For instance, MODE_BGRA relates to samples ordered as B,G,R,A,B,G,R,A,... // Non-capital names (e.g.:MODE_Argb) relates to pre-multiplied RGB channels. -// RGB-565 and RGBA-4444 are also endian-agnostic and byte-oriented. -typedef enum { MODE_RGB = 0, MODE_RGBA = 1, - MODE_BGR = 2, MODE_BGRA = 3, - MODE_ARGB = 4, MODE_RGBA_4444 = 5, - MODE_RGB_565 = 6, - // RGB-premultiplied transparent modes (alpha value is preserved) - MODE_rgbA = 7, - MODE_bgrA = 8, - MODE_Argb = 9, - MODE_rgbA_4444 = 10, - // YUV modes must come after RGB ones. - MODE_YUV = 11, MODE_YUVA = 12, // yuv 4:2:0 - MODE_LAST = 13 - } WEBP_CSP_MODE; +// RGBA-4444 and RGB-565 colorspaces are represented by following byte-order: +// RGBA-4444: [r3 r2 r1 r0 g3 g2 g1 g0], [b3 b2 b1 b0 a3 a2 a1 a0], ... +// RGB-565: [r4 r3 r2 r1 r0 g5 g4 g3], [g2 g1 g0 b4 b3 b2 b1 b0], ... +// In the case WEBP_SWAP_16BITS_CSP is defined, the bytes are swapped for +// these two modes: +// RGBA-4444: [b3 b2 b1 b0 a3 a2 a1 a0], [r3 r2 r1 r0 g3 g2 g1 g0], ... +// RGB-565: [g2 g1 g0 b4 b3 b2 b1 b0], [r4 r3 r2 r1 r0 g5 g4 g3], ... + +typedef enum WEBP_CSP_MODE { + MODE_RGB = 0, MODE_RGBA = 1, + MODE_BGR = 2, MODE_BGRA = 3, + MODE_ARGB = 4, MODE_RGBA_4444 = 5, + MODE_RGB_565 = 6, + // RGB-premultiplied transparent modes (alpha value is preserved) + MODE_rgbA = 7, + MODE_bgrA = 8, + MODE_Argb = 9, + MODE_rgbA_4444 = 10, + // YUV modes must come after RGB ones. + MODE_YUV = 11, MODE_YUVA = 12, // yuv 4:2:0 + MODE_LAST = 13 +} WEBP_CSP_MODE; // Some useful macros: static WEBP_INLINE int WebPIsPremultipliedMode(WEBP_CSP_MODE mode) { @@ -152,13 +177,13 @@ static WEBP_INLINE int WebPIsRGBMode(WEBP_CSP_MODE mode) { //------------------------------------------------------------------------------ // WebPDecBuffer: Generic structure for describing the output sample buffer. -typedef struct { // view as RGBA +struct WebPRGBABuffer { // view as RGBA uint8_t* rgba; // pointer to RGBA samples int stride; // stride in bytes from one scanline to the next. size_t size; // total size of the *rgba buffer. -} WebPRGBABuffer; +}; -typedef struct { // view as YUVA +struct WebPYUVABuffer { // view as YUVA uint8_t* y, *u, *v, *a; // pointer to luma, chroma U/V, alpha samples int y_stride; // luma stride int u_stride, v_stride; // chroma strides @@ -166,10 +191,10 @@ typedef struct { // view as YUVA size_t y_size; // luma plane size size_t u_size, v_size; // chroma planes size size_t a_size; // alpha-plane size -} WebPYUVABuffer; +}; // Output buffer -typedef struct { +struct WebPDecBuffer { WEBP_CSP_MODE colorspace; // Colorspace. int width, height; // Dimensions. int is_external_memory; // If true, 'internal_memory' pointer is not used. @@ -182,7 +207,7 @@ typedef struct { uint8_t* private_memory; // Internally allocated memory (only when // is_external_memory is false). Should not be used // externally, but accessed via the buffer union. -} WebPDecBuffer; +}; // Internal, version-checked, entry point WEBP_EXTERN(int) WebPInitDecBufferInternal(WebPDecBuffer*, int); @@ -200,7 +225,7 @@ WEBP_EXTERN(void) WebPFreeDecBuffer(WebPDecBuffer* buffer); //------------------------------------------------------------------------------ // Enumeration of the status codes -typedef enum { +typedef enum VP8StatusCode { VP8_STATUS_OK = 0, VP8_STATUS_OUT_OF_MEMORY, VP8_STATUS_INVALID_PARAM, @@ -237,13 +262,17 @@ typedef enum { // } // WebPIDelete(idec); -typedef struct WebPIDecoder WebPIDecoder; - // Creates a new incremental decoder with the supplied buffer parameter. // This output_buffer can be passed NULL, in which case a default output buffer // is used (with MODE_RGB). Otherwise, an internal reference to 'output_buffer' // is kept, which means that the lifespan of 'output_buffer' must be larger than // that of the returned WebPIDecoder object. +// The supplied 'output_buffer' content MUST NOT be changed between calls to +// WebPIAppend() or WebPIUpdate() unless 'output_buffer.is_external_memory' is +// set to 1. In such a case, it is allowed to modify the pointers, size and +// stride of output_buffer.u.RGBA or output_buffer.u.YUVA, provided they remain +// within valid bounds. +// All other fields of WebPDecBuffer MUST remain constant between calls. // Returns NULL if the allocation failed. WEBP_EXTERN(WebPIDecoder*) WebPINewDecoder(WebPDecBuffer* output_buffer); @@ -251,19 +280,27 @@ WEBP_EXTERN(WebPIDecoder*) WebPINewDecoder(WebPDecBuffer* output_buffer); // will output the RGB/A samples specified by 'csp' into a preallocated // buffer 'output_buffer'. The size of this buffer is at least // 'output_buffer_size' and the stride (distance in bytes between two scanlines) -// is specified by 'output_stride'. Returns NULL if the allocation failed. +// is specified by 'output_stride'. +// Additionally, output_buffer can be passed NULL in which case the output +// buffer will be allocated automatically when the decoding starts. The +// colorspace 'csp' is taken into account for allocating this buffer. All other +// parameters are ignored. +// Returns NULL if the allocation failed, or if some parameters are invalid. WEBP_EXTERN(WebPIDecoder*) WebPINewRGB( WEBP_CSP_MODE csp, uint8_t* output_buffer, size_t output_buffer_size, int output_stride); // This function allocates and initializes an incremental-decoder object, which -// will output the raw luma/chroma samples into a preallocated planes. The luma -// plane is specified by its pointer 'luma', its size 'luma_size' and its stride -// 'luma_stride'. Similarly, the chroma-u plane is specified by the 'u', -// 'u_size' and 'u_stride' parameters, and the chroma-v plane by 'v' -// and 'v_size'. And same for the alpha-plane. The 'a' pointer can be pass -// NULL in case one is not interested in the transparency plane. -// Returns NULL if the allocation failed. +// will output the raw luma/chroma samples into a preallocated planes if +// supplied. The luma plane is specified by its pointer 'luma', its size +// 'luma_size' and its stride 'luma_stride'. Similarly, the chroma-u plane +// is specified by the 'u', 'u_size' and 'u_stride' parameters, and the chroma-v +// plane by 'v' and 'v_size'. And same for the alpha-plane. The 'a' pointer +// can be pass NULL in case one is not interested in the transparency plane. +// Conversely, 'luma' can be passed NULL if no preallocated planes are supplied. +// In this case, the output buffer will be automatically allocated (using +// MODE_YUVA) when decoding starts. All parameters are then ignored. +// Returns NULL if the allocation failed or if a parameter is invalid. WEBP_EXTERN(WebPIDecoder*) WebPINewYUVA( uint8_t* luma, size_t luma_size, int luma_stride, uint8_t* u, size_t u_size, int u_stride, @@ -344,7 +381,7 @@ WEBP_EXTERN(const WebPDecBuffer*) WebPIDecodedArea( CHECK(WebPGetFeatures(data, data_size, &config.input) == VP8_STATUS_OK); // C) Adjust 'config', if needed - config.no_fancy = 1; + config.no_fancy_upsampling = 1; config.output.colorspace = MODE_BGRA; // etc. @@ -365,19 +402,15 @@ WEBP_EXTERN(const WebPDecBuffer*) WebPIDecodedArea( */ // Features gathered from the bitstream -typedef struct { - int width; // Width in pixels, as read from the bitstream. - int height; // Height in pixels, as read from the bitstream. - int has_alpha; // True if the bitstream contains an alpha channel. - - // Unused for now: - int bitstream_version; // should be 0 for now. TODO(later) - int no_incremental_decoding; // if true, using incremental decoding is not - // recommended. - int rotate; // TODO(later) - int uv_sampling; // should be 0 for now. TODO(later) - uint32_t pad[3]; // padding for later use -} WebPBitstreamFeatures; +struct WebPBitstreamFeatures { + int width; // Width in pixels, as read from the bitstream. + int height; // Height in pixels, as read from the bitstream. + int has_alpha; // True if the bitstream contains an alpha channel. + int has_animation; // True if the bitstream is an animation. + int format; // 0 = undefined (/mixed), 1 = lossy, 2 = lossless + + uint32_t pad[5]; // padding for later use +}; // Internal, version-checked, entry point WEBP_EXTERN(VP8StatusCode) WebPGetFeaturesInternal( @@ -385,8 +418,9 @@ WEBP_EXTERN(VP8StatusCode) WebPGetFeaturesInternal( // Retrieve features from the bitstream. The *features structure is filled // with information gathered from the bitstream. -// Returns false in case of error or version mismatch. -// In case of error, features->bitstream_status will reflect the error code. +// Returns VP8_STATUS_OK when the features are successfully retrieved. Returns +// VP8_STATUS_NOT_ENOUGH_DATA when more data is needed to retrieve the +// features from headers. Returns error in other cases. static WEBP_INLINE VP8StatusCode WebPGetFeatures( const uint8_t* data, size_t data_size, WebPBitstreamFeatures* features) { @@ -395,7 +429,7 @@ static WEBP_INLINE VP8StatusCode WebPGetFeatures( } // Decoding options -typedef struct { +struct WebPDecoderOptions { int bypass_filtering; // if true, skip the in-loop filtering int no_fancy_upsampling; // if true, use faster pointwise upsampler int use_cropping; // if true, cropping is applied _first_ @@ -405,19 +439,19 @@ typedef struct { int use_scaling; // if true, scaling is applied _afterward_ int scaled_width, scaled_height; // final resolution int use_threads; // if true, use multi-threaded decoding + int dithering_strength; // dithering strength (0=Off, 100=full) + int flip; // flip output vertically + int alpha_dithering_strength; // alpha dithering strength in [0..100] - // Unused for now: - int force_rotation; // forced rotation (to be applied _last_) - int no_enhancement; // if true, discard enhancement layer - uint32_t pad[6]; // padding for later use -} WebPDecoderOptions; + uint32_t pad[5]; // padding for later use +}; // Main object storing the configuration for advanced decoding. -typedef struct { +struct WebPDecoderConfig { WebPBitstreamFeatures input; // Immutable bitstream features (optional) WebPDecBuffer output; // Output buffer (can point to external mem) WebPDecoderOptions options; // Decoding options -} WebPDecoderConfig; +}; // Internal, version-checked, entry point WEBP_EXTERN(int) WebPInitDecoderConfigInternal(WebPDecoderConfig*, int); @@ -447,7 +481,7 @@ WEBP_EXTERN(WebPIDecoder*) WebPIDecode(const uint8_t* data, size_t data_size, WEBP_EXTERN(VP8StatusCode) WebPDecode(const uint8_t* data, size_t data_size, WebPDecoderConfig* config); -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/dsp/cpu.c b/drivers/webp/dsp/cpu.c index 0228734457..35c2af7f58 100644 --- a/drivers/webp/dsp/cpu.c +++ b/drivers/webp/dsp/cpu.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // CPU detection @@ -11,14 +13,10 @@ #include "./dsp.h" -#if defined(__ANDROID__) +#if defined(WEBP_ANDROID_NEON) #include <cpu-features.h> #endif -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // SSE2 detection. // @@ -31,22 +29,66 @@ static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { "cpuid\n" "xchg %%edi, %%ebx\n" : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) - : "a"(info_type)); + : "a"(info_type), "c"(0)); } #elif defined(__i386__) || defined(__x86_64__) static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { __asm__ volatile ( "cpuid\n" : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) - : "a"(info_type)); + : "a"(info_type), "c"(0)); } +#elif (defined(_M_X64) || defined(_M_IX86)) && \ + defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 150030729 // >= VS2008 SP1 +#include <intrin.h> +#define GetCPUInfo(info, type) __cpuidex(info, type, 0) // set ecx=0 #elif defined(WEBP_MSC_SSE2) #define GetCPUInfo __cpuid #endif +// NaCl has no support for xgetbv or the raw opcode. +#if !defined(__native_client__) && (defined(__i386__) || defined(__x86_64__)) +static WEBP_INLINE uint64_t xgetbv(void) { + const uint32_t ecx = 0; + uint32_t eax, edx; + // Use the raw opcode for xgetbv for compatibility with older toolchains. + __asm__ volatile ( + ".byte 0x0f, 0x01, 0xd0\n" + : "=a"(eax), "=d"(edx) : "c" (ecx)); + return ((uint64_t)edx << 32) | eax; +} +#elif (defined(_M_X64) || defined(_M_IX86)) && \ + defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 160040219 // >= VS2010 SP1 +#include <immintrin.h> +#define xgetbv() _xgetbv(0) +#elif defined(_MSC_VER) && defined(_M_IX86) +static WEBP_INLINE uint64_t xgetbv(void) { + uint32_t eax_, edx_; + __asm { + xor ecx, ecx // ecx = 0 + // Use the raw opcode for xgetbv for compatibility with older toolchains. + __asm _emit 0x0f __asm _emit 0x01 __asm _emit 0xd0 + mov eax_, eax + mov edx_, edx + } + return ((uint64_t)edx_ << 32) | eax_; +} +#else +#define xgetbv() 0U // no AVX for older x64 or unrecognized toolchains. +#endif + #if defined(__i386__) || defined(__x86_64__) || defined(WEBP_MSC_SSE2) static int x86CPUInfo(CPUFeature feature) { + int max_cpuid_value; int cpu_info[4]; + + // get the highest feature value cpuid supports + GetCPUInfo(cpu_info, 0); + max_cpuid_value = cpu_info[0]; + if (max_cpuid_value < 1) { + return 0; + } + GetCPUInfo(cpu_info, 1); if (feature == kSSE2) { return 0 != (cpu_info[3] & 0x04000000); @@ -54,10 +96,26 @@ static int x86CPUInfo(CPUFeature feature) { if (feature == kSSE3) { return 0 != (cpu_info[2] & 0x00000001); } + if (feature == kSSE4_1) { + return 0 != (cpu_info[2] & 0x00080000); + } + if (feature == kAVX) { + // bits 27 (OSXSAVE) & 28 (256-bit AVX) + if ((cpu_info[2] & 0x18000000) == 0x18000000) { + // XMM state and YMM state enabled by the OS. + return (xgetbv() & 0x6) == 0x6; + } + } + if (feature == kAVX2) { + if (x86CPUInfo(kAVX) && max_cpuid_value >= 7) { + GetCPUInfo(cpu_info, 7); + return ((cpu_info[1] & 0x00000020) == 0x00000020); + } + } return 0; } VP8CPUInfo VP8GetCPUInfo = x86CPUInfo; -#elif defined(WEBP_ANDROID_NEON) +#elif defined(WEBP_ANDROID_NEON) // NB: needs to be before generic NEON test. static int AndroidCPUInfo(CPUFeature feature) { const AndroidCpuFamily cpu_family = android_getCpuFamily(); const uint64_t cpu_features = android_getCpuFeatures(); @@ -68,7 +126,7 @@ static int AndroidCPUInfo(CPUFeature feature) { return 0; } VP8CPUInfo VP8GetCPUInfo = AndroidCPUInfo; -#elif defined(__ARM_NEON__) +#elif defined(WEBP_USE_NEON) // define a dummy function to enable turning off NEON at runtime by setting // VP8DecGetCPUInfo = NULL static int armCPUInfo(CPUFeature feature) { @@ -76,10 +134,17 @@ static int armCPUInfo(CPUFeature feature) { return 1; } VP8CPUInfo VP8GetCPUInfo = armCPUInfo; +#elif defined(WEBP_USE_MIPS32) || defined(WEBP_USE_MIPS_DSP_R2) +static int mipsCPUInfo(CPUFeature feature) { + if ((feature == kMIPS32) || (feature == kMIPSdspR2)) { + return 1; + } else { + return 0; + } + +} +VP8CPUInfo VP8GetCPUInfo = mipsCPUInfo; #else VP8CPUInfo VP8GetCPUInfo = NULL; #endif -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dsp/dec.c b/drivers/webp/dsp/dec.c index 9ae7b6fa76..77a00381c5 100644 --- a/drivers/webp/dsp/dec.c +++ b/drivers/webp/dsp/dec.c @@ -1,53 +1,20 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // -// Speed-critical decoding functions. +// Speed-critical decoding functions, default plain-C implementations. // // Author: Skal (pascal.massimino@gmail.com) #include "./dsp.h" #include "../dec/vp8i.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ -// run-time tables (~4k) - -static uint8_t abs0[255 + 255 + 1]; // abs(i) -static uint8_t abs1[255 + 255 + 1]; // abs(i)>>1 -static int8_t sclip1[1020 + 1020 + 1]; // clips [-1020, 1020] to [-128, 127] -static int8_t sclip2[112 + 112 + 1]; // clips [-112, 112] to [-16, 15] -static uint8_t clip1[255 + 510 + 1]; // clips [-255,510] to [0,255] - -// We declare this variable 'volatile' to prevent instruction reordering -// and make sure it's set to true _last_ (so as to be thread-safe) -static volatile int tables_ok = 0; - -static void DspInitTables(void) { - if (!tables_ok) { - int i; - for (i = -255; i <= 255; ++i) { - abs0[255 + i] = (i < 0) ? -i : i; - abs1[255 + i] = abs0[255 + i] >> 1; - } - for (i = -1020; i <= 1020; ++i) { - sclip1[1020 + i] = (i < -128) ? -128 : (i > 127) ? 127 : i; - } - for (i = -112; i <= 112; ++i) { - sclip2[112 + i] = (i < -16) ? -16 : (i > 15) ? 15 : i; - } - for (i = -255; i <= 255 + 255; ++i) { - clip1[255 + i] = (i < 0) ? 0 : (i > 255) ? 255 : i; - } - tables_ok = 1; - } -} static WEBP_INLINE uint8_t clip_8b(int v) { return (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255; @@ -59,9 +26,16 @@ static WEBP_INLINE uint8_t clip_8b(int v) { #define STORE(x, y, v) \ dst[x + y * BPS] = clip_8b(dst[x + y * BPS] + ((v) >> 3)) -static const int kC1 = 20091 + (1 << 16); -static const int kC2 = 35468; -#define MUL(a, b) (((a) * (b)) >> 16) +#define STORE2(y, dc, d, c) do { \ + const int DC = (dc); \ + STORE(0, y, DC + (d)); \ + STORE(1, y, DC + (c)); \ + STORE(2, y, DC - (c)); \ + STORE(3, y, DC - (d)); \ +} while (0) + +#define MUL1(a) ((((a) * 20091) >> 16) + (a)) +#define MUL2(a) (((a) * 35468) >> 16) static void TransformOne(const int16_t* in, uint8_t* dst) { int C[4 * 4], *tmp; @@ -70,8 +44,8 @@ static void TransformOne(const int16_t* in, uint8_t* dst) { for (i = 0; i < 4; ++i) { // vertical pass const int a = in[0] + in[8]; // [-4096, 4094] const int b = in[0] - in[8]; // [-4095, 4095] - const int c = MUL(in[4], kC2) - MUL(in[12], kC1); // [-3783, 3783] - const int d = MUL(in[4], kC1) + MUL(in[12], kC2); // [-3785, 3781] + const int c = MUL2(in[4]) - MUL1(in[12]); // [-3783, 3783] + const int d = MUL1(in[4]) + MUL2(in[12]); // [-3785, 3781] tmp[0] = a + d; // [-7881, 7875] tmp[1] = b + c; // [-7878, 7878] tmp[2] = b - c; // [-7878, 7878] @@ -80,7 +54,7 @@ static void TransformOne(const int16_t* in, uint8_t* dst) { in++; } // Each pass is expanding the dynamic range by ~3.85 (upper bound). - // The exact value is (2. + (kC1 + kC2) / 65536). + // The exact value is (2. + (20091 + 35468) / 65536). // After the second pass, maximum interval is [-3794, 3794], assuming // an input in [-2048, 2047] interval. We then need to add a dst value // in the [0, 255] range. @@ -91,8 +65,8 @@ static void TransformOne(const int16_t* in, uint8_t* dst) { const int dc = tmp[0] + 4; const int a = dc + tmp[8]; const int b = dc - tmp[8]; - const int c = MUL(tmp[4], kC2) - MUL(tmp[12], kC1); - const int d = MUL(tmp[4], kC1) + MUL(tmp[12], kC2); + const int c = MUL2(tmp[4]) - MUL1(tmp[12]); + const int d = MUL1(tmp[4]) + MUL2(tmp[12]); STORE(0, 0, a + d); STORE(1, 0, b + c); STORE(2, 0, b - c); @@ -101,7 +75,22 @@ static void TransformOne(const int16_t* in, uint8_t* dst) { dst += BPS; } } -#undef MUL + +// Simplified transform when only in[0], in[1] and in[4] are non-zero +static void TransformAC3(const int16_t* in, uint8_t* dst) { + const int a = in[0] + 4; + const int c4 = MUL2(in[4]); + const int d4 = MUL1(in[4]); + const int c1 = MUL2(in[1]); + const int d1 = MUL1(in[1]); + STORE2(0, a + d4, d1, c1); + STORE2(1, a + c4, d1, c1); + STORE2(2, a - c4, d1, c1); + STORE2(3, a - d4, d1, c1); +} +#undef MUL1 +#undef MUL2 +#undef STORE2 static void TransformTwo(const int16_t* in, uint8_t* dst, int do_two) { TransformOne(in, dst); @@ -115,7 +104,7 @@ static void TransformUV(const int16_t* in, uint8_t* dst) { VP8Transform(in + 2 * 16, dst + 4 * BPS, 1); } -static void TransformDC(const int16_t *in, uint8_t* dst) { +static void TransformDC(const int16_t* in, uint8_t* dst) { const int DC = in[0] + 4; int i, j; for (j = 0; j < 4; ++j) { @@ -126,10 +115,10 @@ static void TransformDC(const int16_t *in, uint8_t* dst) { } static void TransformDCUV(const int16_t* in, uint8_t* dst) { - if (in[0 * 16]) TransformDC(in + 0 * 16, dst); - if (in[1 * 16]) TransformDC(in + 1 * 16, dst + 4); - if (in[2 * 16]) TransformDC(in + 2 * 16, dst + 4 * BPS); - if (in[3 * 16]) TransformDC(in + 3 * 16, dst + 4 * BPS + 4); + if (in[0 * 16]) VP8TransformDC(in + 0 * 16, dst); + if (in[1 * 16]) VP8TransformDC(in + 1 * 16, dst + 4); + if (in[2 * 16]) VP8TransformDC(in + 2 * 16, dst + 4 * BPS); + if (in[3 * 16]) VP8TransformDC(in + 3 * 16, dst + 4 * BPS + 4); } #undef STORE @@ -164,16 +153,16 @@ static void TransformWHT(const int16_t* in, int16_t* out) { } } -void (*VP8TransformWHT)(const int16_t* in, int16_t* out) = TransformWHT; +void (*VP8TransformWHT)(const int16_t* in, int16_t* out); //------------------------------------------------------------------------------ // Intra predictions #define DST(x, y) dst[(x) + (y) * BPS] -static WEBP_INLINE void TrueMotion(uint8_t *dst, int size) { +static WEBP_INLINE void TrueMotion(uint8_t* dst, int size) { const uint8_t* top = dst - BPS; - const uint8_t* const clip0 = clip1 + 255 - top[-1]; + const uint8_t* const clip0 = VP8kclip1 - top[-1]; int y; for (y = 0; y < size; ++y) { const uint8_t* const clip = clip0 + dst[-1]; @@ -184,21 +173,21 @@ static WEBP_INLINE void TrueMotion(uint8_t *dst, int size) { dst += BPS; } } -static void TM4(uint8_t *dst) { TrueMotion(dst, 4); } -static void TM8uv(uint8_t *dst) { TrueMotion(dst, 8); } -static void TM16(uint8_t *dst) { TrueMotion(dst, 16); } +static void TM4(uint8_t* dst) { TrueMotion(dst, 4); } +static void TM8uv(uint8_t* dst) { TrueMotion(dst, 8); } +static void TM16(uint8_t* dst) { TrueMotion(dst, 16); } //------------------------------------------------------------------------------ // 16x16 -static void VE16(uint8_t *dst) { // vertical +static void VE16(uint8_t* dst) { // vertical int j; for (j = 0; j < 16; ++j) { memcpy(dst + j * BPS, dst - BPS, 16); } } -static void HE16(uint8_t *dst) { // horizontal +static void HE16(uint8_t* dst) { // horizontal int j; for (j = 16; j > 0; --j) { memset(dst, dst[-1], 16); @@ -213,7 +202,7 @@ static WEBP_INLINE void Put16(int v, uint8_t* dst) { } } -static void DC16(uint8_t *dst) { // DC +static void DC16(uint8_t* dst) { // DC int DC = 16; int j; for (j = 0; j < 16; ++j) { @@ -222,7 +211,7 @@ static void DC16(uint8_t *dst) { // DC Put16(DC >> 5, dst); } -static void DC16NoTop(uint8_t *dst) { // DC with top samples not available +static void DC16NoTop(uint8_t* dst) { // DC with top samples not available int DC = 8; int j; for (j = 0; j < 16; ++j) { @@ -231,7 +220,7 @@ static void DC16NoTop(uint8_t *dst) { // DC with top samples not available Put16(DC >> 4, dst); } -static void DC16NoLeft(uint8_t *dst) { // DC with left samples not available +static void DC16NoLeft(uint8_t* dst) { // DC with left samples not available int DC = 8; int i; for (i = 0; i < 16; ++i) { @@ -240,17 +229,19 @@ static void DC16NoLeft(uint8_t *dst) { // DC with left samples not available Put16(DC >> 4, dst); } -static void DC16NoTopLeft(uint8_t *dst) { // DC with no top and left samples +static void DC16NoTopLeft(uint8_t* dst) { // DC with no top and left samples Put16(0x80, dst); } +VP8PredFunc VP8PredLuma16[NUM_B_DC_MODES]; + //------------------------------------------------------------------------------ // 4x4 #define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2) #define AVG2(a, b) (((a) + (b) + 1) >> 1) -static void VE4(uint8_t *dst) { // vertical +static void VE4(uint8_t* dst) { // vertical const uint8_t* top = dst - BPS; const uint8_t vals[4] = { AVG3(top[-1], top[0], top[1]), @@ -264,7 +255,7 @@ static void VE4(uint8_t *dst) { // vertical } } -static void HE4(uint8_t *dst) { // horizontal +static void HE4(uint8_t* dst) { // horizontal const int A = dst[-1 - BPS]; const int B = dst[-1]; const int C = dst[-1 + BPS]; @@ -276,7 +267,7 @@ static void HE4(uint8_t *dst) { // horizontal *(uint32_t*)(dst + 3 * BPS) = 0x01010101U * AVG3(D, E, E); } -static void DC4(uint8_t *dst) { // DC +static void DC4(uint8_t* dst) { // DC uint32_t dc = 4; int i; for (i = 0; i < 4; ++i) dc += dst[i - BPS] + dst[-1 + i * BPS]; @@ -284,7 +275,7 @@ static void DC4(uint8_t *dst) { // DC for (i = 0; i < 4; ++i) memset(dst + i * BPS, dc, 4); } -static void RD4(uint8_t *dst) { // Down-right +static void RD4(uint8_t* dst) { // Down-right const int I = dst[-1 + 0 * BPS]; const int J = dst[-1 + 1 * BPS]; const int K = dst[-1 + 2 * BPS]; @@ -295,15 +286,15 @@ static void RD4(uint8_t *dst) { // Down-right const int C = dst[2 - BPS]; const int D = dst[3 - BPS]; DST(0, 3) = AVG3(J, K, L); - DST(0, 2) = DST(1, 3) = AVG3(I, J, K); - DST(0, 1) = DST(1, 2) = DST(2, 3) = AVG3(X, I, J); - DST(0, 0) = DST(1, 1) = DST(2, 2) = DST(3, 3) = AVG3(A, X, I); - DST(1, 0) = DST(2, 1) = DST(3, 2) = AVG3(B, A, X); - DST(2, 0) = DST(3, 1) = AVG3(C, B, A); - DST(3, 0) = AVG3(D, C, B); + DST(1, 3) = DST(0, 2) = AVG3(I, J, K); + DST(2, 3) = DST(1, 2) = DST(0, 1) = AVG3(X, I, J); + DST(3, 3) = DST(2, 2) = DST(1, 1) = DST(0, 0) = AVG3(A, X, I); + DST(3, 2) = DST(2, 1) = DST(1, 0) = AVG3(B, A, X); + DST(3, 1) = DST(2, 0) = AVG3(C, B, A); + DST(3, 0) = AVG3(D, C, B); } -static void LD4(uint8_t *dst) { // Down-Left +static void LD4(uint8_t* dst) { // Down-Left const int A = dst[0 - BPS]; const int B = dst[1 - BPS]; const int C = dst[2 - BPS]; @@ -316,12 +307,12 @@ static void LD4(uint8_t *dst) { // Down-Left DST(1, 0) = DST(0, 1) = AVG3(B, C, D); DST(2, 0) = DST(1, 1) = DST(0, 2) = AVG3(C, D, E); DST(3, 0) = DST(2, 1) = DST(1, 2) = DST(0, 3) = AVG3(D, E, F); - DST(3, 1) = DST(2, 2) = DST(1, 3) = AVG3(E, F, G); - DST(3, 2) = DST(2, 3) = AVG3(F, G, H); - DST(3, 3) = AVG3(G, H, H); + DST(3, 1) = DST(2, 2) = DST(1, 3) = AVG3(E, F, G); + DST(3, 2) = DST(2, 3) = AVG3(F, G, H); + DST(3, 3) = AVG3(G, H, H); } -static void VR4(uint8_t *dst) { // Vertical-Right +static void VR4(uint8_t* dst) { // Vertical-Right const int I = dst[-1 + 0 * BPS]; const int J = dst[-1 + 1 * BPS]; const int K = dst[-1 + 2 * BPS]; @@ -343,7 +334,7 @@ static void VR4(uint8_t *dst) { // Vertical-Right DST(3, 1) = AVG3(B, C, D); } -static void VL4(uint8_t *dst) { // Vertical-Left +static void VL4(uint8_t* dst) { // Vertical-Left const int A = dst[0 - BPS]; const int B = dst[1 - BPS]; const int C = dst[2 - BPS]; @@ -365,7 +356,7 @@ static void VL4(uint8_t *dst) { // Vertical-Left DST(3, 3) = AVG3(F, G, H); } -static void HU4(uint8_t *dst) { // Horizontal-Up +static void HU4(uint8_t* dst) { // Horizontal-Up const int I = dst[-1 + 0 * BPS]; const int J = dst[-1 + 1 * BPS]; const int K = dst[-1 + 2 * BPS]; @@ -380,7 +371,7 @@ static void HU4(uint8_t *dst) { // Horizontal-Up DST(0, 3) = DST(1, 3) = DST(2, 3) = DST(3, 3) = L; } -static void HD4(uint8_t *dst) { // Horizontal-Down +static void HD4(uint8_t* dst) { // Horizontal-Down const int I = dst[-1 + 0 * BPS]; const int J = dst[-1 + 1 * BPS]; const int K = dst[-1 + 2 * BPS]; @@ -407,17 +398,19 @@ static void HD4(uint8_t *dst) { // Horizontal-Down #undef AVG3 #undef AVG2 +VP8PredFunc VP8PredLuma4[NUM_BMODES]; + //------------------------------------------------------------------------------ // Chroma -static void VE8uv(uint8_t *dst) { // vertical +static void VE8uv(uint8_t* dst) { // vertical int j; for (j = 0; j < 8; ++j) { memcpy(dst + j * BPS, dst - BPS, 8); } } -static void HE8uv(uint8_t *dst) { // horizontal +static void HE8uv(uint8_t* dst) { // horizontal int j; for (j = 0; j < 8; ++j) { memset(dst, dst[-1], 8); @@ -426,60 +419,45 @@ static void HE8uv(uint8_t *dst) { // horizontal } // helper for chroma-DC predictions -static WEBP_INLINE void Put8x8uv(uint64_t v, uint8_t* dst) { +static WEBP_INLINE void Put8x8uv(uint8_t value, uint8_t* dst) { int j; for (j = 0; j < 8; ++j) { - *(uint64_t*)(dst + j * BPS) = v; + memset(dst + j * BPS, value, 8); } } -static void DC8uv(uint8_t *dst) { // DC +static void DC8uv(uint8_t* dst) { // DC int dc0 = 8; int i; for (i = 0; i < 8; ++i) { dc0 += dst[i - BPS] + dst[-1 + i * BPS]; } - Put8x8uv((uint64_t)((dc0 >> 4) * 0x0101010101010101ULL), dst); + Put8x8uv(dc0 >> 4, dst); } -static void DC8uvNoLeft(uint8_t *dst) { // DC with no left samples +static void DC8uvNoLeft(uint8_t* dst) { // DC with no left samples int dc0 = 4; int i; for (i = 0; i < 8; ++i) { dc0 += dst[i - BPS]; } - Put8x8uv((uint64_t)((dc0 >> 3) * 0x0101010101010101ULL), dst); + Put8x8uv(dc0 >> 3, dst); } -static void DC8uvNoTop(uint8_t *dst) { // DC with no top samples +static void DC8uvNoTop(uint8_t* dst) { // DC with no top samples int dc0 = 4; int i; for (i = 0; i < 8; ++i) { dc0 += dst[-1 + i * BPS]; } - Put8x8uv((uint64_t)((dc0 >> 3) * 0x0101010101010101ULL), dst); + Put8x8uv(dc0 >> 3, dst); } -static void DC8uvNoTopLeft(uint8_t *dst) { // DC with nothing - Put8x8uv(0x8080808080808080ULL, dst); +static void DC8uvNoTopLeft(uint8_t* dst) { // DC with nothing + Put8x8uv(0x80, dst); } -//------------------------------------------------------------------------------ -// default C implementations - -const VP8PredFunc VP8PredLuma4[NUM_BMODES] = { - DC4, TM4, VE4, HE4, RD4, VR4, LD4, VL4, HD4, HU4 -}; - -const VP8PredFunc VP8PredLuma16[NUM_B_DC_MODES] = { - DC16, TM16, VE16, HE16, - DC16NoTop, DC16NoLeft, DC16NoTopLeft -}; - -const VP8PredFunc VP8PredChroma8[NUM_B_DC_MODES] = { - DC8uv, TM8uv, VE8uv, HE8uv, - DC8uvNoTop, DC8uvNoLeft, DC8uvNoTopLeft -}; +VP8PredFunc VP8PredChroma8[NUM_B_DC_MODES]; //------------------------------------------------------------------------------ // Edge filtering functions @@ -487,61 +465,62 @@ const VP8PredFunc VP8PredChroma8[NUM_B_DC_MODES] = { // 4 pixels in, 2 pixels out static WEBP_INLINE void do_filter2(uint8_t* p, int step) { const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; - const int a = 3 * (q0 - p0) + sclip1[1020 + p1 - q1]; - const int a1 = sclip2[112 + ((a + 4) >> 3)]; - const int a2 = sclip2[112 + ((a + 3) >> 3)]; - p[-step] = clip1[255 + p0 + a2]; - p[ 0] = clip1[255 + q0 - a1]; + const int a = 3 * (q0 - p0) + VP8ksclip1[p1 - q1]; // in [-893,892] + const int a1 = VP8ksclip2[(a + 4) >> 3]; // in [-16,15] + const int a2 = VP8ksclip2[(a + 3) >> 3]; + p[-step] = VP8kclip1[p0 + a2]; + p[ 0] = VP8kclip1[q0 - a1]; } // 4 pixels in, 4 pixels out static WEBP_INLINE void do_filter4(uint8_t* p, int step) { const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; const int a = 3 * (q0 - p0); - const int a1 = sclip2[112 + ((a + 4) >> 3)]; - const int a2 = sclip2[112 + ((a + 3) >> 3)]; + const int a1 = VP8ksclip2[(a + 4) >> 3]; + const int a2 = VP8ksclip2[(a + 3) >> 3]; const int a3 = (a1 + 1) >> 1; - p[-2*step] = clip1[255 + p1 + a3]; - p[- step] = clip1[255 + p0 + a2]; - p[ 0] = clip1[255 + q0 - a1]; - p[ step] = clip1[255 + q1 - a3]; + p[-2*step] = VP8kclip1[p1 + a3]; + p[- step] = VP8kclip1[p0 + a2]; + p[ 0] = VP8kclip1[q0 - a1]; + p[ step] = VP8kclip1[q1 - a3]; } // 6 pixels in, 6 pixels out static WEBP_INLINE void do_filter6(uint8_t* p, int step) { const int p2 = p[-3*step], p1 = p[-2*step], p0 = p[-step]; const int q0 = p[0], q1 = p[step], q2 = p[2*step]; - const int a = sclip1[1020 + 3 * (q0 - p0) + sclip1[1020 + p1 - q1]]; + const int a = VP8ksclip1[3 * (q0 - p0) + VP8ksclip1[p1 - q1]]; + // a is in [-128,127], a1 in [-27,27], a2 in [-18,18] and a3 in [-9,9] const int a1 = (27 * a + 63) >> 7; // eq. to ((3 * a + 7) * 9) >> 7 const int a2 = (18 * a + 63) >> 7; // eq. to ((2 * a + 7) * 9) >> 7 const int a3 = (9 * a + 63) >> 7; // eq. to ((1 * a + 7) * 9) >> 7 - p[-3*step] = clip1[255 + p2 + a3]; - p[-2*step] = clip1[255 + p1 + a2]; - p[- step] = clip1[255 + p0 + a1]; - p[ 0] = clip1[255 + q0 - a1]; - p[ step] = clip1[255 + q1 - a2]; - p[ 2*step] = clip1[255 + q2 - a3]; + p[-3*step] = VP8kclip1[p2 + a3]; + p[-2*step] = VP8kclip1[p1 + a2]; + p[- step] = VP8kclip1[p0 + a1]; + p[ 0] = VP8kclip1[q0 - a1]; + p[ step] = VP8kclip1[q1 - a2]; + p[ 2*step] = VP8kclip1[q2 - a3]; } static WEBP_INLINE int hev(const uint8_t* p, int step, int thresh) { const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; - return (abs0[255 + p1 - p0] > thresh) || (abs0[255 + q1 - q0] > thresh); + return (VP8kabs0[p1 - p0] > thresh) || (VP8kabs0[q1 - q0] > thresh); } -static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int thresh) { - const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; - return (2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) <= thresh; +static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int t) { + const int p1 = p[-2 * step], p0 = p[-step], q0 = p[0], q1 = p[step]; + return ((4 * VP8kabs0[p0 - q0] + VP8kabs0[p1 - q1]) <= t); } static WEBP_INLINE int needs_filter2(const uint8_t* p, int step, int t, int it) { - const int p3 = p[-4*step], p2 = p[-3*step], p1 = p[-2*step], p0 = p[-step]; - const int q0 = p[0], q1 = p[step], q2 = p[2*step], q3 = p[3*step]; - if ((2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) > t) - return 0; - return abs0[255 + p3 - p2] <= it && abs0[255 + p2 - p1] <= it && - abs0[255 + p1 - p0] <= it && abs0[255 + q3 - q2] <= it && - abs0[255 + q2 - q1] <= it && abs0[255 + q1 - q0] <= it; + const int p3 = p[-4 * step], p2 = p[-3 * step], p1 = p[-2 * step]; + const int p0 = p[-step], q0 = p[0]; + const int q1 = p[step], q2 = p[2 * step], q3 = p[3 * step]; + if ((4 * VP8kabs0[p0 - q0] + VP8kabs0[p1 - q1]) > t) return 0; + return VP8kabs0[p3 - p2] <= it && VP8kabs0[p2 - p1] <= it && + VP8kabs0[p1 - p0] <= it && VP8kabs0[q3 - q2] <= it && + VP8kabs0[q2 - q1] <= it && VP8kabs0[q1 - q0] <= it; } //------------------------------------------------------------------------------ @@ -549,8 +528,9 @@ static WEBP_INLINE int needs_filter2(const uint8_t* p, static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { int i; + const int thresh2 = 2 * thresh + 1; for (i = 0; i < 16; ++i) { - if (needs_filter(p + i, stride, thresh)) { + if (needs_filter(p + i, stride, thresh2)) { do_filter2(p + i, stride); } } @@ -558,8 +538,9 @@ static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { static void SimpleHFilter16(uint8_t* p, int stride, int thresh) { int i; + const int thresh2 = 2 * thresh + 1; for (i = 0; i < 16; ++i) { - if (needs_filter(p + i * stride, 1, thresh)) { + if (needs_filter(p + i * stride, 1, thresh2)) { do_filter2(p + i * stride, 1); } } @@ -587,8 +568,9 @@ static void SimpleHFilter16i(uint8_t* p, int stride, int thresh) { static WEBP_INLINE void FilterLoop26(uint8_t* p, int hstride, int vstride, int size, int thresh, int ithresh, int hev_thresh) { + const int thresh2 = 2 * thresh + 1; while (size-- > 0) { - if (needs_filter2(p, hstride, thresh, ithresh)) { + if (needs_filter2(p, hstride, thresh2, ithresh)) { if (hev(p, hstride, hev_thresh)) { do_filter2(p, hstride); } else { @@ -602,8 +584,9 @@ static WEBP_INLINE void FilterLoop26(uint8_t* p, static WEBP_INLINE void FilterLoop24(uint8_t* p, int hstride, int vstride, int size, int thresh, int ithresh, int hev_thresh) { + const int thresh2 = 2 * thresh + 1; while (size-- > 0) { - if (needs_filter2(p, hstride, thresh, ithresh)) { + if (needs_filter2(p, hstride, thresh2, ithresh)) { if (hev(p, hstride, hev_thresh)) { do_filter2(p, hstride); } else { @@ -672,6 +655,7 @@ static void HFilter8i(uint8_t* u, uint8_t* v, int stride, //------------------------------------------------------------------------------ VP8DecIdct2 VP8Transform; +VP8DecIdct VP8TransformAC3; VP8DecIdct VP8TransformUV; VP8DecIdct VP8TransformDC; VP8DecIdct VP8TransformDCUV; @@ -690,15 +674,25 @@ VP8SimpleFilterFunc VP8SimpleVFilter16i; VP8SimpleFilterFunc VP8SimpleHFilter16i; extern void VP8DspInitSSE2(void); +extern void VP8DspInitSSE41(void); extern void VP8DspInitNEON(void); +extern void VP8DspInitMIPS32(void); +extern void VP8DspInitMIPSdspR2(void); + +static volatile VP8CPUInfo dec_last_cpuinfo_used = + (VP8CPUInfo)&dec_last_cpuinfo_used; -void VP8DspInit(void) { - DspInitTables(); +WEBP_TSAN_IGNORE_FUNCTION void VP8DspInit(void) { + if (dec_last_cpuinfo_used == VP8GetCPUInfo) return; + VP8InitClipTables(); + + VP8TransformWHT = TransformWHT; VP8Transform = TransformTwo; VP8TransformUV = TransformUV; VP8TransformDC = TransformDC; VP8TransformDCUV = TransformDCUV; + VP8TransformAC3 = TransformAC3; VP8VFilter16 = VFilter16; VP8HFilter16 = HFilter16; @@ -713,20 +707,60 @@ void VP8DspInit(void) { VP8SimpleVFilter16i = SimpleVFilter16i; VP8SimpleHFilter16i = SimpleHFilter16i; + VP8PredLuma4[0] = DC4; + VP8PredLuma4[1] = TM4; + VP8PredLuma4[2] = VE4; + VP8PredLuma4[3] = HE4; + VP8PredLuma4[4] = RD4; + VP8PredLuma4[5] = VR4; + VP8PredLuma4[6] = LD4; + VP8PredLuma4[7] = VL4; + VP8PredLuma4[8] = HD4; + VP8PredLuma4[9] = HU4; + + VP8PredLuma16[0] = DC16; + VP8PredLuma16[1] = TM16; + VP8PredLuma16[2] = VE16; + VP8PredLuma16[3] = HE16; + VP8PredLuma16[4] = DC16NoTop; + VP8PredLuma16[5] = DC16NoLeft; + VP8PredLuma16[6] = DC16NoTopLeft; + + VP8PredChroma8[0] = DC8uv; + VP8PredChroma8[1] = TM8uv; + VP8PredChroma8[2] = VE8uv; + VP8PredChroma8[3] = HE8uv; + VP8PredChroma8[4] = DC8uvNoTop; + VP8PredChroma8[5] = DC8uvNoLeft; + VP8PredChroma8[6] = DC8uvNoTopLeft; + // If defined, use CPUInfo() to overwrite some pointers with faster versions. - if (VP8GetCPUInfo) { + if (VP8GetCPUInfo != NULL) { #if defined(WEBP_USE_SSE2) if (VP8GetCPUInfo(kSSE2)) { VP8DspInitSSE2(); +#if defined(WEBP_USE_SSE41) + if (VP8GetCPUInfo(kSSE4_1)) { + VP8DspInitSSE41(); + } +#endif } -#elif defined(WEBP_USE_NEON) +#endif +#if defined(WEBP_USE_NEON) if (VP8GetCPUInfo(kNEON)) { VP8DspInitNEON(); } #endif +#if defined(WEBP_USE_MIPS32) + if (VP8GetCPUInfo(kMIPS32)) { + VP8DspInitMIPS32(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + VP8DspInitMIPSdspR2(); + } +#endif } + dec_last_cpuinfo_used = VP8GetCPUInfo; } - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dsp/dec_neon.c b/drivers/webp/dsp/dec_neon.c index ec824b790b..a63f43fe17 100644 --- a/drivers/webp/dsp/dec_neon.c +++ b/drivers/webp/dsp/dec_neon.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // ARM NEON version of dsp functions and loop filtering. @@ -14,13 +16,535 @@ #if defined(WEBP_USE_NEON) +#include "./neon.h" #include "../dec/vp8i.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +//------------------------------------------------------------------------------ +// NxM Loading functions + +// Load/Store vertical edge +#define LOAD8x4(c1, c2, c3, c4, b1, b2, stride) \ + "vld4.8 {" #c1 "[0]," #c2 "[0]," #c3 "[0]," #c4 "[0]}," #b1 "," #stride "\n" \ + "vld4.8 {" #c1 "[1]," #c2 "[1]," #c3 "[1]," #c4 "[1]}," #b2 "," #stride "\n" \ + "vld4.8 {" #c1 "[2]," #c2 "[2]," #c3 "[2]," #c4 "[2]}," #b1 "," #stride "\n" \ + "vld4.8 {" #c1 "[3]," #c2 "[3]," #c3 "[3]," #c4 "[3]}," #b2 "," #stride "\n" \ + "vld4.8 {" #c1 "[4]," #c2 "[4]," #c3 "[4]," #c4 "[4]}," #b1 "," #stride "\n" \ + "vld4.8 {" #c1 "[5]," #c2 "[5]," #c3 "[5]," #c4 "[5]}," #b2 "," #stride "\n" \ + "vld4.8 {" #c1 "[6]," #c2 "[6]," #c3 "[6]," #c4 "[6]}," #b1 "," #stride "\n" \ + "vld4.8 {" #c1 "[7]," #c2 "[7]," #c3 "[7]," #c4 "[7]}," #b2 "," #stride "\n" + +#define STORE8x2(c1, c2, p, stride) \ + "vst2.8 {" #c1 "[0], " #c2 "[0]}," #p "," #stride " \n" \ + "vst2.8 {" #c1 "[1], " #c2 "[1]}," #p "," #stride " \n" \ + "vst2.8 {" #c1 "[2], " #c2 "[2]}," #p "," #stride " \n" \ + "vst2.8 {" #c1 "[3], " #c2 "[3]}," #p "," #stride " \n" \ + "vst2.8 {" #c1 "[4], " #c2 "[4]}," #p "," #stride " \n" \ + "vst2.8 {" #c1 "[5], " #c2 "[5]}," #p "," #stride " \n" \ + "vst2.8 {" #c1 "[6], " #c2 "[6]}," #p "," #stride " \n" \ + "vst2.8 {" #c1 "[7], " #c2 "[7]}," #p "," #stride " \n" + +#if !defined(WORK_AROUND_GCC) + +// This intrinsics version makes gcc-4.6.3 crash during Load4x??() compilation +// (register alloc, probably). The variants somewhat mitigate the problem, but +// not quite. HFilter16i() remains problematic. +static WEBP_INLINE uint8x8x4_t Load4x8(const uint8_t* const src, int stride) { + const uint8x8_t zero = vdup_n_u8(0); + uint8x8x4_t out; + INIT_VECTOR4(out, zero, zero, zero, zero); + out = vld4_lane_u8(src + 0 * stride, out, 0); + out = vld4_lane_u8(src + 1 * stride, out, 1); + out = vld4_lane_u8(src + 2 * stride, out, 2); + out = vld4_lane_u8(src + 3 * stride, out, 3); + out = vld4_lane_u8(src + 4 * stride, out, 4); + out = vld4_lane_u8(src + 5 * stride, out, 5); + out = vld4_lane_u8(src + 6 * stride, out, 6); + out = vld4_lane_u8(src + 7 * stride, out, 7); + return out; +} + +static WEBP_INLINE void Load4x16(const uint8_t* const src, int stride, + uint8x16_t* const p1, uint8x16_t* const p0, + uint8x16_t* const q0, uint8x16_t* const q1) { + // row0 = p1[0..7]|p0[0..7]|q0[0..7]|q1[0..7] + // row8 = p1[8..15]|p0[8..15]|q0[8..15]|q1[8..15] + const uint8x8x4_t row0 = Load4x8(src - 2 + 0 * stride, stride); + const uint8x8x4_t row8 = Load4x8(src - 2 + 8 * stride, stride); + *p1 = vcombine_u8(row0.val[0], row8.val[0]); + *p0 = vcombine_u8(row0.val[1], row8.val[1]); + *q0 = vcombine_u8(row0.val[2], row8.val[2]); + *q1 = vcombine_u8(row0.val[3], row8.val[3]); +} + +#else // WORK_AROUND_GCC + +#define LOADQ_LANE_32b(VALUE, LANE) do { \ + (VALUE) = vld1q_lane_u32((const uint32_t*)src, (VALUE), (LANE)); \ + src += stride; \ +} while (0) + +static WEBP_INLINE void Load4x16(const uint8_t* src, int stride, + uint8x16_t* const p1, uint8x16_t* const p0, + uint8x16_t* const q0, uint8x16_t* const q1) { + const uint32x4_t zero = vdupq_n_u32(0); + uint32x4x4_t in; + INIT_VECTOR4(in, zero, zero, zero, zero); + src -= 2; + LOADQ_LANE_32b(in.val[0], 0); + LOADQ_LANE_32b(in.val[1], 0); + LOADQ_LANE_32b(in.val[2], 0); + LOADQ_LANE_32b(in.val[3], 0); + LOADQ_LANE_32b(in.val[0], 1); + LOADQ_LANE_32b(in.val[1], 1); + LOADQ_LANE_32b(in.val[2], 1); + LOADQ_LANE_32b(in.val[3], 1); + LOADQ_LANE_32b(in.val[0], 2); + LOADQ_LANE_32b(in.val[1], 2); + LOADQ_LANE_32b(in.val[2], 2); + LOADQ_LANE_32b(in.val[3], 2); + LOADQ_LANE_32b(in.val[0], 3); + LOADQ_LANE_32b(in.val[1], 3); + LOADQ_LANE_32b(in.val[2], 3); + LOADQ_LANE_32b(in.val[3], 3); + // Transpose four 4x4 parts: + { + const uint8x16x2_t row01 = vtrnq_u8(vreinterpretq_u8_u32(in.val[0]), + vreinterpretq_u8_u32(in.val[1])); + const uint8x16x2_t row23 = vtrnq_u8(vreinterpretq_u8_u32(in.val[2]), + vreinterpretq_u8_u32(in.val[3])); + const uint16x8x2_t row02 = vtrnq_u16(vreinterpretq_u16_u8(row01.val[0]), + vreinterpretq_u16_u8(row23.val[0])); + const uint16x8x2_t row13 = vtrnq_u16(vreinterpretq_u16_u8(row01.val[1]), + vreinterpretq_u16_u8(row23.val[1])); + *p1 = vreinterpretq_u8_u16(row02.val[0]); + *p0 = vreinterpretq_u8_u16(row13.val[0]); + *q0 = vreinterpretq_u8_u16(row02.val[1]); + *q1 = vreinterpretq_u8_u16(row13.val[1]); + } +} +#undef LOADQ_LANE_32b + +#endif // !WORK_AROUND_GCC + +static WEBP_INLINE void Load8x16(const uint8_t* const src, int stride, + uint8x16_t* const p3, uint8x16_t* const p2, + uint8x16_t* const p1, uint8x16_t* const p0, + uint8x16_t* const q0, uint8x16_t* const q1, + uint8x16_t* const q2, uint8x16_t* const q3) { + Load4x16(src - 2, stride, p3, p2, p1, p0); + Load4x16(src + 2, stride, q0, q1, q2, q3); +} + +static WEBP_INLINE void Load16x4(const uint8_t* const src, int stride, + uint8x16_t* const p1, uint8x16_t* const p0, + uint8x16_t* const q0, uint8x16_t* const q1) { + *p1 = vld1q_u8(src - 2 * stride); + *p0 = vld1q_u8(src - 1 * stride); + *q0 = vld1q_u8(src + 0 * stride); + *q1 = vld1q_u8(src + 1 * stride); +} + +static WEBP_INLINE void Load16x8(const uint8_t* const src, int stride, + uint8x16_t* const p3, uint8x16_t* const p2, + uint8x16_t* const p1, uint8x16_t* const p0, + uint8x16_t* const q0, uint8x16_t* const q1, + uint8x16_t* const q2, uint8x16_t* const q3) { + Load16x4(src - 2 * stride, stride, p3, p2, p1, p0); + Load16x4(src + 2 * stride, stride, q0, q1, q2, q3); +} + +static WEBP_INLINE void Load8x8x2(const uint8_t* const u, + const uint8_t* const v, + int stride, + uint8x16_t* const p3, uint8x16_t* const p2, + uint8x16_t* const p1, uint8x16_t* const p0, + uint8x16_t* const q0, uint8x16_t* const q1, + uint8x16_t* const q2, uint8x16_t* const q3) { + // We pack the 8x8 u-samples in the lower half of the uint8x16_t destination + // and the v-samples on the higher half. + *p3 = vcombine_u8(vld1_u8(u - 4 * stride), vld1_u8(v - 4 * stride)); + *p2 = vcombine_u8(vld1_u8(u - 3 * stride), vld1_u8(v - 3 * stride)); + *p1 = vcombine_u8(vld1_u8(u - 2 * stride), vld1_u8(v - 2 * stride)); + *p0 = vcombine_u8(vld1_u8(u - 1 * stride), vld1_u8(v - 1 * stride)); + *q0 = vcombine_u8(vld1_u8(u + 0 * stride), vld1_u8(v + 0 * stride)); + *q1 = vcombine_u8(vld1_u8(u + 1 * stride), vld1_u8(v + 1 * stride)); + *q2 = vcombine_u8(vld1_u8(u + 2 * stride), vld1_u8(v + 2 * stride)); + *q3 = vcombine_u8(vld1_u8(u + 3 * stride), vld1_u8(v + 3 * stride)); +} + +#if !defined(WORK_AROUND_GCC) + +#define LOAD_UV_8(ROW) \ + vcombine_u8(vld1_u8(u - 4 + (ROW) * stride), vld1_u8(v - 4 + (ROW) * stride)) + +static WEBP_INLINE void Load8x8x2T(const uint8_t* const u, + const uint8_t* const v, + int stride, + uint8x16_t* const p3, uint8x16_t* const p2, + uint8x16_t* const p1, uint8x16_t* const p0, + uint8x16_t* const q0, uint8x16_t* const q1, + uint8x16_t* const q2, uint8x16_t* const q3) { + // We pack the 8x8 u-samples in the lower half of the uint8x16_t destination + // and the v-samples on the higher half. + const uint8x16_t row0 = LOAD_UV_8(0); + const uint8x16_t row1 = LOAD_UV_8(1); + const uint8x16_t row2 = LOAD_UV_8(2); + const uint8x16_t row3 = LOAD_UV_8(3); + const uint8x16_t row4 = LOAD_UV_8(4); + const uint8x16_t row5 = LOAD_UV_8(5); + const uint8x16_t row6 = LOAD_UV_8(6); + const uint8x16_t row7 = LOAD_UV_8(7); + // Perform two side-by-side 8x8 transposes + // u00 u01 u02 u03 u04 u05 u06 u07 | v00 v01 v02 v03 v04 v05 v06 v07 + // u10 u11 u12 u13 u14 u15 u16 u17 | v10 v11 v12 ... + // u20 u21 u22 u23 u24 u25 u26 u27 | v20 v21 ... + // u30 u31 u32 u33 u34 u35 u36 u37 | ... + // u40 u41 u42 u43 u44 u45 u46 u47 | ... + // u50 u51 u52 u53 u54 u55 u56 u57 | ... + // u60 u61 u62 u63 u64 u65 u66 u67 | v60 ... + // u70 u71 u72 u73 u74 u75 u76 u77 | v70 v71 v72 ... + const uint8x16x2_t row01 = vtrnq_u8(row0, row1); // u00 u10 u02 u12 ... + // u01 u11 u03 u13 ... + const uint8x16x2_t row23 = vtrnq_u8(row2, row3); // u20 u30 u22 u32 ... + // u21 u31 u23 u33 ... + const uint8x16x2_t row45 = vtrnq_u8(row4, row5); // ... + const uint8x16x2_t row67 = vtrnq_u8(row6, row7); // ... + const uint16x8x2_t row02 = vtrnq_u16(vreinterpretq_u16_u8(row01.val[0]), + vreinterpretq_u16_u8(row23.val[0])); + const uint16x8x2_t row13 = vtrnq_u16(vreinterpretq_u16_u8(row01.val[1]), + vreinterpretq_u16_u8(row23.val[1])); + const uint16x8x2_t row46 = vtrnq_u16(vreinterpretq_u16_u8(row45.val[0]), + vreinterpretq_u16_u8(row67.val[0])); + const uint16x8x2_t row57 = vtrnq_u16(vreinterpretq_u16_u8(row45.val[1]), + vreinterpretq_u16_u8(row67.val[1])); + const uint32x4x2_t row04 = vtrnq_u32(vreinterpretq_u32_u16(row02.val[0]), + vreinterpretq_u32_u16(row46.val[0])); + const uint32x4x2_t row26 = vtrnq_u32(vreinterpretq_u32_u16(row02.val[1]), + vreinterpretq_u32_u16(row46.val[1])); + const uint32x4x2_t row15 = vtrnq_u32(vreinterpretq_u32_u16(row13.val[0]), + vreinterpretq_u32_u16(row57.val[0])); + const uint32x4x2_t row37 = vtrnq_u32(vreinterpretq_u32_u16(row13.val[1]), + vreinterpretq_u32_u16(row57.val[1])); + *p3 = vreinterpretq_u8_u32(row04.val[0]); + *p2 = vreinterpretq_u8_u32(row15.val[0]); + *p1 = vreinterpretq_u8_u32(row26.val[0]); + *p0 = vreinterpretq_u8_u32(row37.val[0]); + *q0 = vreinterpretq_u8_u32(row04.val[1]); + *q1 = vreinterpretq_u8_u32(row15.val[1]); + *q2 = vreinterpretq_u8_u32(row26.val[1]); + *q3 = vreinterpretq_u8_u32(row37.val[1]); +} +#undef LOAD_UV_8 + +#endif // !WORK_AROUND_GCC + +static WEBP_INLINE void Store2x8(const uint8x8x2_t v, + uint8_t* const dst, int stride) { + vst2_lane_u8(dst + 0 * stride, v, 0); + vst2_lane_u8(dst + 1 * stride, v, 1); + vst2_lane_u8(dst + 2 * stride, v, 2); + vst2_lane_u8(dst + 3 * stride, v, 3); + vst2_lane_u8(dst + 4 * stride, v, 4); + vst2_lane_u8(dst + 5 * stride, v, 5); + vst2_lane_u8(dst + 6 * stride, v, 6); + vst2_lane_u8(dst + 7 * stride, v, 7); +} -#define QRegs "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", \ +static WEBP_INLINE void Store2x16(const uint8x16_t p0, const uint8x16_t q0, + uint8_t* const dst, int stride) { + uint8x8x2_t lo, hi; + lo.val[0] = vget_low_u8(p0); + lo.val[1] = vget_low_u8(q0); + hi.val[0] = vget_high_u8(p0); + hi.val[1] = vget_high_u8(q0); + Store2x8(lo, dst - 1 + 0 * stride, stride); + Store2x8(hi, dst - 1 + 8 * stride, stride); +} + +#if !defined(WORK_AROUND_GCC) +static WEBP_INLINE void Store4x8(const uint8x8x4_t v, + uint8_t* const dst, int stride) { + vst4_lane_u8(dst + 0 * stride, v, 0); + vst4_lane_u8(dst + 1 * stride, v, 1); + vst4_lane_u8(dst + 2 * stride, v, 2); + vst4_lane_u8(dst + 3 * stride, v, 3); + vst4_lane_u8(dst + 4 * stride, v, 4); + vst4_lane_u8(dst + 5 * stride, v, 5); + vst4_lane_u8(dst + 6 * stride, v, 6); + vst4_lane_u8(dst + 7 * stride, v, 7); +} + +static WEBP_INLINE void Store4x16(const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + uint8_t* const dst, int stride) { + uint8x8x4_t lo, hi; + INIT_VECTOR4(lo, + vget_low_u8(p1), vget_low_u8(p0), + vget_low_u8(q0), vget_low_u8(q1)); + INIT_VECTOR4(hi, + vget_high_u8(p1), vget_high_u8(p0), + vget_high_u8(q0), vget_high_u8(q1)); + Store4x8(lo, dst - 2 + 0 * stride, stride); + Store4x8(hi, dst - 2 + 8 * stride, stride); +} +#endif // !WORK_AROUND_GCC + +static WEBP_INLINE void Store16x2(const uint8x16_t p0, const uint8x16_t q0, + uint8_t* const dst, int stride) { + vst1q_u8(dst - stride, p0); + vst1q_u8(dst, q0); +} + +static WEBP_INLINE void Store16x4(const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + uint8_t* const dst, int stride) { + Store16x2(p1, p0, dst - stride, stride); + Store16x2(q0, q1, dst + stride, stride); +} + +static WEBP_INLINE void Store8x2x2(const uint8x16_t p0, const uint8x16_t q0, + uint8_t* const u, uint8_t* const v, + int stride) { + // p0 and q0 contain the u+v samples packed in low/high halves. + vst1_u8(u - stride, vget_low_u8(p0)); + vst1_u8(u, vget_low_u8(q0)); + vst1_u8(v - stride, vget_high_u8(p0)); + vst1_u8(v, vget_high_u8(q0)); +} + +static WEBP_INLINE void Store8x4x2(const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + uint8_t* const u, uint8_t* const v, + int stride) { + // The p1...q1 registers contain the u+v samples packed in low/high halves. + Store8x2x2(p1, p0, u - stride, v - stride, stride); + Store8x2x2(q0, q1, u + stride, v + stride, stride); +} + +#if !defined(WORK_AROUND_GCC) + +#define STORE6_LANE(DST, VAL0, VAL1, LANE) do { \ + vst3_lane_u8((DST) - 3, (VAL0), (LANE)); \ + vst3_lane_u8((DST) + 0, (VAL1), (LANE)); \ + (DST) += stride; \ +} while (0) + +static WEBP_INLINE void Store6x8x2(const uint8x16_t p2, const uint8x16_t p1, + const uint8x16_t p0, const uint8x16_t q0, + const uint8x16_t q1, const uint8x16_t q2, + uint8_t* u, uint8_t* v, + int stride) { + uint8x8x3_t u0, u1, v0, v1; + INIT_VECTOR3(u0, vget_low_u8(p2), vget_low_u8(p1), vget_low_u8(p0)); + INIT_VECTOR3(u1, vget_low_u8(q0), vget_low_u8(q1), vget_low_u8(q2)); + INIT_VECTOR3(v0, vget_high_u8(p2), vget_high_u8(p1), vget_high_u8(p0)); + INIT_VECTOR3(v1, vget_high_u8(q0), vget_high_u8(q1), vget_high_u8(q2)); + STORE6_LANE(u, u0, u1, 0); + STORE6_LANE(u, u0, u1, 1); + STORE6_LANE(u, u0, u1, 2); + STORE6_LANE(u, u0, u1, 3); + STORE6_LANE(u, u0, u1, 4); + STORE6_LANE(u, u0, u1, 5); + STORE6_LANE(u, u0, u1, 6); + STORE6_LANE(u, u0, u1, 7); + STORE6_LANE(v, v0, v1, 0); + STORE6_LANE(v, v0, v1, 1); + STORE6_LANE(v, v0, v1, 2); + STORE6_LANE(v, v0, v1, 3); + STORE6_LANE(v, v0, v1, 4); + STORE6_LANE(v, v0, v1, 5); + STORE6_LANE(v, v0, v1, 6); + STORE6_LANE(v, v0, v1, 7); +} +#undef STORE6_LANE + +static WEBP_INLINE void Store4x8x2(const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + uint8_t* const u, uint8_t* const v, + int stride) { + uint8x8x4_t u0, v0; + INIT_VECTOR4(u0, + vget_low_u8(p1), vget_low_u8(p0), + vget_low_u8(q0), vget_low_u8(q1)); + INIT_VECTOR4(v0, + vget_high_u8(p1), vget_high_u8(p0), + vget_high_u8(q0), vget_high_u8(q1)); + vst4_lane_u8(u - 2 + 0 * stride, u0, 0); + vst4_lane_u8(u - 2 + 1 * stride, u0, 1); + vst4_lane_u8(u - 2 + 2 * stride, u0, 2); + vst4_lane_u8(u - 2 + 3 * stride, u0, 3); + vst4_lane_u8(u - 2 + 4 * stride, u0, 4); + vst4_lane_u8(u - 2 + 5 * stride, u0, 5); + vst4_lane_u8(u - 2 + 6 * stride, u0, 6); + vst4_lane_u8(u - 2 + 7 * stride, u0, 7); + vst4_lane_u8(v - 2 + 0 * stride, v0, 0); + vst4_lane_u8(v - 2 + 1 * stride, v0, 1); + vst4_lane_u8(v - 2 + 2 * stride, v0, 2); + vst4_lane_u8(v - 2 + 3 * stride, v0, 3); + vst4_lane_u8(v - 2 + 4 * stride, v0, 4); + vst4_lane_u8(v - 2 + 5 * stride, v0, 5); + vst4_lane_u8(v - 2 + 6 * stride, v0, 6); + vst4_lane_u8(v - 2 + 7 * stride, v0, 7); +} + +#endif // !WORK_AROUND_GCC + +// Zero extend 'v' to an int16x8_t. +static WEBP_INLINE int16x8_t ConvertU8ToS16(uint8x8_t v) { + return vreinterpretq_s16_u16(vmovl_u8(v)); +} + +// Performs unsigned 8b saturation on 'dst01' and 'dst23' storing the result +// to the corresponding rows of 'dst'. +static WEBP_INLINE void SaturateAndStore4x4(uint8_t* const dst, + const int16x8_t dst01, + const int16x8_t dst23) { + // Unsigned saturate to 8b. + const uint8x8_t dst01_u8 = vqmovun_s16(dst01); + const uint8x8_t dst23_u8 = vqmovun_s16(dst23); + + // Store the results. + vst1_lane_u32((uint32_t*)(dst + 0 * BPS), vreinterpret_u32_u8(dst01_u8), 0); + vst1_lane_u32((uint32_t*)(dst + 1 * BPS), vreinterpret_u32_u8(dst01_u8), 1); + vst1_lane_u32((uint32_t*)(dst + 2 * BPS), vreinterpret_u32_u8(dst23_u8), 0); + vst1_lane_u32((uint32_t*)(dst + 3 * BPS), vreinterpret_u32_u8(dst23_u8), 1); +} + +static WEBP_INLINE void Add4x4(const int16x8_t row01, const int16x8_t row23, + uint8_t* const dst) { + uint32x2_t dst01 = vdup_n_u32(0); + uint32x2_t dst23 = vdup_n_u32(0); + + // Load the source pixels. + dst01 = vld1_lane_u32((uint32_t*)(dst + 0 * BPS), dst01, 0); + dst23 = vld1_lane_u32((uint32_t*)(dst + 2 * BPS), dst23, 0); + dst01 = vld1_lane_u32((uint32_t*)(dst + 1 * BPS), dst01, 1); + dst23 = vld1_lane_u32((uint32_t*)(dst + 3 * BPS), dst23, 1); + + { + // Convert to 16b. + const int16x8_t dst01_s16 = ConvertU8ToS16(vreinterpret_u8_u32(dst01)); + const int16x8_t dst23_s16 = ConvertU8ToS16(vreinterpret_u8_u32(dst23)); + + // Descale with rounding. + const int16x8_t out01 = vrsraq_n_s16(dst01_s16, row01, 3); + const int16x8_t out23 = vrsraq_n_s16(dst23_s16, row23, 3); + // Add the inverse transform. + SaturateAndStore4x4(dst, out01, out23); + } +} + +//----------------------------------------------------------------------------- +// Simple In-loop filtering (Paragraph 15.2) + +static uint8x16_t NeedsFilter(const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + int thresh) { + const uint8x16_t thresh_v = vdupq_n_u8((uint8_t)thresh); + const uint8x16_t a_p0_q0 = vabdq_u8(p0, q0); // abs(p0-q0) + const uint8x16_t a_p1_q1 = vabdq_u8(p1, q1); // abs(p1-q1) + const uint8x16_t a_p0_q0_2 = vqaddq_u8(a_p0_q0, a_p0_q0); // 2 * abs(p0-q0) + const uint8x16_t a_p1_q1_2 = vshrq_n_u8(a_p1_q1, 1); // abs(p1-q1) / 2 + const uint8x16_t sum = vqaddq_u8(a_p0_q0_2, a_p1_q1_2); + const uint8x16_t mask = vcgeq_u8(thresh_v, sum); + return mask; +} + +static int8x16_t FlipSign(const uint8x16_t v) { + const uint8x16_t sign_bit = vdupq_n_u8(0x80); + return vreinterpretq_s8_u8(veorq_u8(v, sign_bit)); +} + +static uint8x16_t FlipSignBack(const int8x16_t v) { + const int8x16_t sign_bit = vdupq_n_s8(0x80); + return vreinterpretq_u8_s8(veorq_s8(v, sign_bit)); +} + +static int8x16_t GetBaseDelta(const int8x16_t p1, const int8x16_t p0, + const int8x16_t q0, const int8x16_t q1) { + const int8x16_t q0_p0 = vqsubq_s8(q0, p0); // (q0-p0) + const int8x16_t p1_q1 = vqsubq_s8(p1, q1); // (p1-q1) + const int8x16_t s1 = vqaddq_s8(p1_q1, q0_p0); // (p1-q1) + 1 * (q0 - p0) + const int8x16_t s2 = vqaddq_s8(q0_p0, s1); // (p1-q1) + 2 * (q0 - p0) + const int8x16_t s3 = vqaddq_s8(q0_p0, s2); // (p1-q1) + 3 * (q0 - p0) + return s3; +} + +static int8x16_t GetBaseDelta0(const int8x16_t p0, const int8x16_t q0) { + const int8x16_t q0_p0 = vqsubq_s8(q0, p0); // (q0-p0) + const int8x16_t s1 = vqaddq_s8(q0_p0, q0_p0); // 2 * (q0 - p0) + const int8x16_t s2 = vqaddq_s8(q0_p0, s1); // 3 * (q0 - p0) + return s2; +} + +//------------------------------------------------------------------------------ + +static void ApplyFilter2NoFlip(const int8x16_t p0s, const int8x16_t q0s, + const int8x16_t delta, + int8x16_t* const op0, int8x16_t* const oq0) { + const int8x16_t kCst3 = vdupq_n_s8(0x03); + const int8x16_t kCst4 = vdupq_n_s8(0x04); + const int8x16_t delta_p3 = vqaddq_s8(delta, kCst3); + const int8x16_t delta_p4 = vqaddq_s8(delta, kCst4); + const int8x16_t delta3 = vshrq_n_s8(delta_p3, 3); + const int8x16_t delta4 = vshrq_n_s8(delta_p4, 3); + *op0 = vqaddq_s8(p0s, delta3); + *oq0 = vqsubq_s8(q0s, delta4); +} + +#if defined(WEBP_USE_INTRINSICS) + +static void ApplyFilter2(const int8x16_t p0s, const int8x16_t q0s, + const int8x16_t delta, + uint8x16_t* const op0, uint8x16_t* const oq0) { + const int8x16_t kCst3 = vdupq_n_s8(0x03); + const int8x16_t kCst4 = vdupq_n_s8(0x04); + const int8x16_t delta_p3 = vqaddq_s8(delta, kCst3); + const int8x16_t delta_p4 = vqaddq_s8(delta, kCst4); + const int8x16_t delta3 = vshrq_n_s8(delta_p3, 3); + const int8x16_t delta4 = vshrq_n_s8(delta_p4, 3); + const int8x16_t sp0 = vqaddq_s8(p0s, delta3); + const int8x16_t sq0 = vqsubq_s8(q0s, delta4); + *op0 = FlipSignBack(sp0); + *oq0 = FlipSignBack(sq0); +} + +static void DoFilter2(const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + const uint8x16_t mask, + uint8x16_t* const op0, uint8x16_t* const oq0) { + const int8x16_t p1s = FlipSign(p1); + const int8x16_t p0s = FlipSign(p0); + const int8x16_t q0s = FlipSign(q0); + const int8x16_t q1s = FlipSign(q1); + const int8x16_t delta0 = GetBaseDelta(p1s, p0s, q0s, q1s); + const int8x16_t delta1 = vandq_s8(delta0, vreinterpretq_s8_u8(mask)); + ApplyFilter2(p0s, q0s, delta1, op0, oq0); +} + +static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { + uint8x16_t p1, p0, q0, q1, op0, oq0; + Load16x4(p, stride, &p1, &p0, &q0, &q1); + { + const uint8x16_t mask = NeedsFilter(p1, p0, q0, q1, thresh); + DoFilter2(p1, p0, q0, q1, mask, &op0, &oq0); + } + Store16x2(op0, oq0, p, stride); +} + +static void SimpleHFilter16(uint8_t* p, int stride, int thresh) { + uint8x16_t p1, p0, q0, q1, oq0, op0; + Load4x16(p, stride, &p1, &p0, &q0, &q1); + { + const uint8x16_t mask = NeedsFilter(p1, p0, q0, q1, thresh); + DoFilter2(p1, p0, q0, q1, mask, &op0, &oq0); + } + Store2x16(op0, oq0, p, stride); +} + +#else + +#define QRegs "q0", "q1", "q2", "q3", \ "q8", "q9", "q10", "q11", "q12", "q13", "q14", "q15" #define FLIP_SIGN_BIT2(a, b, s) \ @@ -68,40 +592,16 @@ extern "C" { DO_SIMPLE_FILTER(p0, q0, q9) /* apply filter */ \ FLIP_SIGN_BIT2(p0, q0, q10) -// Load/Store vertical edge -#define LOAD8x4(c1, c2, c3, c4, b1, b2, stride) \ - "vld4.8 {" #c1"[0], " #c2"[0], " #c3"[0], " #c4"[0]}," #b1 "," #stride"\n" \ - "vld4.8 {" #c1"[1], " #c2"[1], " #c3"[1], " #c4"[1]}," #b2 "," #stride"\n" \ - "vld4.8 {" #c1"[2], " #c2"[2], " #c3"[2], " #c4"[2]}," #b1 "," #stride"\n" \ - "vld4.8 {" #c1"[3], " #c2"[3], " #c3"[3], " #c4"[3]}," #b2 "," #stride"\n" \ - "vld4.8 {" #c1"[4], " #c2"[4], " #c3"[4], " #c4"[4]}," #b1 "," #stride"\n" \ - "vld4.8 {" #c1"[5], " #c2"[5], " #c3"[5], " #c4"[5]}," #b2 "," #stride"\n" \ - "vld4.8 {" #c1"[6], " #c2"[6], " #c3"[6], " #c4"[6]}," #b1 "," #stride"\n" \ - "vld4.8 {" #c1"[7], " #c2"[7], " #c3"[7], " #c4"[7]}," #b2 "," #stride"\n" - -#define STORE8x2(c1, c2, p,stride) \ - "vst2.8 {" #c1"[0], " #c2"[0]}," #p "," #stride " \n" \ - "vst2.8 {" #c1"[1], " #c2"[1]}," #p "," #stride " \n" \ - "vst2.8 {" #c1"[2], " #c2"[2]}," #p "," #stride " \n" \ - "vst2.8 {" #c1"[3], " #c2"[3]}," #p "," #stride " \n" \ - "vst2.8 {" #c1"[4], " #c2"[4]}," #p "," #stride " \n" \ - "vst2.8 {" #c1"[5], " #c2"[5]}," #p "," #stride " \n" \ - "vst2.8 {" #c1"[6], " #c2"[6]}," #p "," #stride " \n" \ - "vst2.8 {" #c1"[7], " #c2"[7]}," #p "," #stride " \n" - -//----------------------------------------------------------------------------- -// Simple In-loop filtering (Paragraph 15.2) - -static void SimpleVFilter16NEON(uint8_t* p, int stride, int thresh) { +static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { __asm__ volatile ( "sub %[p], %[p], %[stride], lsl #1 \n" // p -= 2 * stride "vld1.u8 {q1}, [%[p]], %[stride] \n" // p1 "vld1.u8 {q2}, [%[p]], %[stride] \n" // p0 "vld1.u8 {q3}, [%[p]], %[stride] \n" // q0 - "vld1.u8 {q4}, [%[p]] \n" // q1 + "vld1.u8 {q12}, [%[p]] \n" // q1 - DO_FILTER2(q1, q2, q3, q4, %[thresh]) + DO_FILTER2(q1, q2, q3, q12, %[thresh]) "sub %[p], %[p], %[stride], lsl #1 \n" // p -= 2 * stride @@ -113,25 +613,25 @@ static void SimpleVFilter16NEON(uint8_t* p, int stride, int thresh) { ); } -static void SimpleHFilter16NEON(uint8_t* p, int stride, int thresh) { +static void SimpleHFilter16(uint8_t* p, int stride, int thresh) { __asm__ volatile ( "sub r4, %[p], #2 \n" // base1 = p - 2 "lsl r6, %[stride], #1 \n" // r6 = 2 * stride "add r5, r4, %[stride] \n" // base2 = base1 + stride LOAD8x4(d2, d3, d4, d5, [r4], [r5], r6) - LOAD8x4(d6, d7, d8, d9, [r4], [r5], r6) - "vswp d3, d6 \n" // p1:q1 p0:q3 - "vswp d5, d8 \n" // q0:q2 q1:q4 - "vswp q2, q3 \n" // p1:q1 p0:q2 q0:q3 q1:q4 + LOAD8x4(d24, d25, d26, d27, [r4], [r5], r6) + "vswp d3, d24 \n" // p1:q1 p0:q3 + "vswp d5, d26 \n" // q0:q2 q1:q4 + "vswp q2, q12 \n" // p1:q1 p0:q2 q0:q3 q1:q4 - DO_FILTER2(q1, q2, q3, q4, %[thresh]) + DO_FILTER2(q1, q2, q12, q13, %[thresh]) "sub %[p], %[p], #1 \n" // p - 1 - "vswp d5, d6 \n" + "vswp d5, d24 \n" STORE8x2(d4, d5, [%[p]], %[stride]) - STORE8x2(d6, d7, [%[p]], %[stride]) + STORE8x2(d24, d25, [%[p]], %[stride]) : [p] "+r"(p) : [stride] "r"(stride), [thresh] "r"(thresh) @@ -139,44 +639,408 @@ static void SimpleHFilter16NEON(uint8_t* p, int stride, int thresh) { ); } -static void SimpleVFilter16iNEON(uint8_t* p, int stride, int thresh) { - int k; - for (k = 3; k > 0; --k) { +#endif // WEBP_USE_INTRINSICS + +static void SimpleVFilter16i(uint8_t* p, int stride, int thresh) { + uint32_t k; + for (k = 3; k != 0; --k) { p += 4 * stride; - SimpleVFilter16NEON(p, stride, thresh); + SimpleVFilter16(p, stride, thresh); } } -static void SimpleHFilter16iNEON(uint8_t* p, int stride, int thresh) { - int k; - for (k = 3; k > 0; --k) { +static void SimpleHFilter16i(uint8_t* p, int stride, int thresh) { + uint32_t k; + for (k = 3; k != 0; --k) { p += 4; - SimpleHFilter16NEON(p, stride, thresh); + SimpleHFilter16(p, stride, thresh); } } -static void TransformOneNEON(const int16_t *in, uint8_t *dst) { - const int kBPS = BPS; - const int16_t constants[] = {20091, 17734, 0, 0}; - /* kC1, kC2. Padded because vld1.16 loads 8 bytes - * Technically these are unsigned but vqdmulh is only available in signed. - * vqdmulh returns high half (effectively >> 16) but also doubles the value, - * changing the >> 16 to >> 15 and requiring an additional >> 1. - * We use this to our advantage with kC2. The canonical value is 35468. - * However, the high bit is set so treating it as signed will give incorrect - * results. We avoid this by down shifting by 1 here to clear the highest bit. - * Combined with the doubling effect of vqdmulh we get >> 16. - * This can not be applied to kC1 because the lowest bit is set. Down shifting - * the constant would reduce precision. - */ - - /* libwebp uses a trick to avoid some extra addition that libvpx does. - * Instead of: - * temp2 = ip[12] + ((ip[12] * cospi8sqrt2minus1) >> 16); - * libwebp adds 1 << 16 to cospi8sqrt2minus1 (kC1). However, this causes the - * same issue with kC1 and vqdmulh that we work around by down shifting kC2 - */ +//------------------------------------------------------------------------------ +// Complex In-loop filtering (Paragraph 15.3) + +static uint8x16_t NeedsHev(const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + int hev_thresh) { + const uint8x16_t hev_thresh_v = vdupq_n_u8((uint8_t)hev_thresh); + const uint8x16_t a_p1_p0 = vabdq_u8(p1, p0); // abs(p1 - p0) + const uint8x16_t a_q1_q0 = vabdq_u8(q1, q0); // abs(q1 - q0) + const uint8x16_t mask1 = vcgtq_u8(a_p1_p0, hev_thresh_v); + const uint8x16_t mask2 = vcgtq_u8(a_q1_q0, hev_thresh_v); + const uint8x16_t mask = vorrq_u8(mask1, mask2); + return mask; +} + +static uint8x16_t NeedsFilter2(const uint8x16_t p3, const uint8x16_t p2, + const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + const uint8x16_t q2, const uint8x16_t q3, + int ithresh, int thresh) { + const uint8x16_t ithresh_v = vdupq_n_u8((uint8_t)ithresh); + const uint8x16_t a_p3_p2 = vabdq_u8(p3, p2); // abs(p3 - p2) + const uint8x16_t a_p2_p1 = vabdq_u8(p2, p1); // abs(p2 - p1) + const uint8x16_t a_p1_p0 = vabdq_u8(p1, p0); // abs(p1 - p0) + const uint8x16_t a_q3_q2 = vabdq_u8(q3, q2); // abs(q3 - q2) + const uint8x16_t a_q2_q1 = vabdq_u8(q2, q1); // abs(q2 - q1) + const uint8x16_t a_q1_q0 = vabdq_u8(q1, q0); // abs(q1 - q0) + const uint8x16_t max1 = vmaxq_u8(a_p3_p2, a_p2_p1); + const uint8x16_t max2 = vmaxq_u8(a_p1_p0, a_q3_q2); + const uint8x16_t max3 = vmaxq_u8(a_q2_q1, a_q1_q0); + const uint8x16_t max12 = vmaxq_u8(max1, max2); + const uint8x16_t max123 = vmaxq_u8(max12, max3); + const uint8x16_t mask2 = vcgeq_u8(ithresh_v, max123); + const uint8x16_t mask1 = NeedsFilter(p1, p0, q0, q1, thresh); + const uint8x16_t mask = vandq_u8(mask1, mask2); + return mask; +} + +// 4-points filter + +static void ApplyFilter4( + const int8x16_t p1, const int8x16_t p0, + const int8x16_t q0, const int8x16_t q1, + const int8x16_t delta0, + uint8x16_t* const op1, uint8x16_t* const op0, + uint8x16_t* const oq0, uint8x16_t* const oq1) { + const int8x16_t kCst3 = vdupq_n_s8(0x03); + const int8x16_t kCst4 = vdupq_n_s8(0x04); + const int8x16_t delta1 = vqaddq_s8(delta0, kCst4); + const int8x16_t delta2 = vqaddq_s8(delta0, kCst3); + const int8x16_t a1 = vshrq_n_s8(delta1, 3); + const int8x16_t a2 = vshrq_n_s8(delta2, 3); + const int8x16_t a3 = vrshrq_n_s8(a1, 1); // a3 = (a1 + 1) >> 1 + *op0 = FlipSignBack(vqaddq_s8(p0, a2)); // clip(p0 + a2) + *oq0 = FlipSignBack(vqsubq_s8(q0, a1)); // clip(q0 - a1) + *op1 = FlipSignBack(vqaddq_s8(p1, a3)); // clip(p1 + a3) + *oq1 = FlipSignBack(vqsubq_s8(q1, a3)); // clip(q1 - a3) +} + +static void DoFilter4( + const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, + const uint8x16_t mask, const uint8x16_t hev_mask, + uint8x16_t* const op1, uint8x16_t* const op0, + uint8x16_t* const oq0, uint8x16_t* const oq1) { + // This is a fused version of DoFilter2() calling ApplyFilter2 directly + const int8x16_t p1s = FlipSign(p1); + int8x16_t p0s = FlipSign(p0); + int8x16_t q0s = FlipSign(q0); + const int8x16_t q1s = FlipSign(q1); + const uint8x16_t simple_lf_mask = vandq_u8(mask, hev_mask); + + // do_filter2 part (simple loopfilter on pixels with hev) + { + const int8x16_t delta = GetBaseDelta(p1s, p0s, q0s, q1s); + const int8x16_t simple_lf_delta = + vandq_s8(delta, vreinterpretq_s8_u8(simple_lf_mask)); + ApplyFilter2NoFlip(p0s, q0s, simple_lf_delta, &p0s, &q0s); + } + + // do_filter4 part (complex loopfilter on pixels without hev) + { + const int8x16_t delta0 = GetBaseDelta0(p0s, q0s); + // we use: (mask & hev_mask) ^ mask = mask & !hev_mask + const uint8x16_t complex_lf_mask = veorq_u8(simple_lf_mask, mask); + const int8x16_t complex_lf_delta = + vandq_s8(delta0, vreinterpretq_s8_u8(complex_lf_mask)); + ApplyFilter4(p1s, p0s, q0s, q1s, complex_lf_delta, op1, op0, oq0, oq1); + } +} + +// 6-points filter + +static void ApplyFilter6( + const int8x16_t p2, const int8x16_t p1, const int8x16_t p0, + const int8x16_t q0, const int8x16_t q1, const int8x16_t q2, + const int8x16_t delta, + uint8x16_t* const op2, uint8x16_t* const op1, uint8x16_t* const op0, + uint8x16_t* const oq0, uint8x16_t* const oq1, uint8x16_t* const oq2) { + const int16x8_t kCst63 = vdupq_n_s16(63); + const int8x8_t kCst27 = vdup_n_s8(27); + const int8x8_t kCst18 = vdup_n_s8(18); + const int8x8_t kCst9 = vdup_n_s8(9); + const int8x8_t delta_lo = vget_low_s8(delta); + const int8x8_t delta_hi = vget_high_s8(delta); + const int16x8_t s1_lo = vmlal_s8(kCst63, kCst27, delta_lo); // 63 + 27 * a + const int16x8_t s1_hi = vmlal_s8(kCst63, kCst27, delta_hi); // 63 + 27 * a + const int16x8_t s2_lo = vmlal_s8(kCst63, kCst18, delta_lo); // 63 + 18 * a + const int16x8_t s2_hi = vmlal_s8(kCst63, kCst18, delta_hi); // 63 + 18 * a + const int16x8_t s3_lo = vmlal_s8(kCst63, kCst9, delta_lo); // 63 + 9 * a + const int16x8_t s3_hi = vmlal_s8(kCst63, kCst9, delta_hi); // 63 + 9 * a + const int8x8_t a1_lo = vqshrn_n_s16(s1_lo, 7); + const int8x8_t a1_hi = vqshrn_n_s16(s1_hi, 7); + const int8x8_t a2_lo = vqshrn_n_s16(s2_lo, 7); + const int8x8_t a2_hi = vqshrn_n_s16(s2_hi, 7); + const int8x8_t a3_lo = vqshrn_n_s16(s3_lo, 7); + const int8x8_t a3_hi = vqshrn_n_s16(s3_hi, 7); + const int8x16_t a1 = vcombine_s8(a1_lo, a1_hi); + const int8x16_t a2 = vcombine_s8(a2_lo, a2_hi); + const int8x16_t a3 = vcombine_s8(a3_lo, a3_hi); + + *op0 = FlipSignBack(vqaddq_s8(p0, a1)); // clip(p0 + a1) + *oq0 = FlipSignBack(vqsubq_s8(q0, a1)); // clip(q0 - q1) + *oq1 = FlipSignBack(vqsubq_s8(q1, a2)); // clip(q1 - a2) + *op1 = FlipSignBack(vqaddq_s8(p1, a2)); // clip(p1 + a2) + *oq2 = FlipSignBack(vqsubq_s8(q2, a3)); // clip(q2 - a3) + *op2 = FlipSignBack(vqaddq_s8(p2, a3)); // clip(p2 + a3) +} + +static void DoFilter6( + const uint8x16_t p2, const uint8x16_t p1, const uint8x16_t p0, + const uint8x16_t q0, const uint8x16_t q1, const uint8x16_t q2, + const uint8x16_t mask, const uint8x16_t hev_mask, + uint8x16_t* const op2, uint8x16_t* const op1, uint8x16_t* const op0, + uint8x16_t* const oq0, uint8x16_t* const oq1, uint8x16_t* const oq2) { + // This is a fused version of DoFilter2() calling ApplyFilter2 directly + const int8x16_t p2s = FlipSign(p2); + const int8x16_t p1s = FlipSign(p1); + int8x16_t p0s = FlipSign(p0); + int8x16_t q0s = FlipSign(q0); + const int8x16_t q1s = FlipSign(q1); + const int8x16_t q2s = FlipSign(q2); + const uint8x16_t simple_lf_mask = vandq_u8(mask, hev_mask); + const int8x16_t delta0 = GetBaseDelta(p1s, p0s, q0s, q1s); + + // do_filter2 part (simple loopfilter on pixels with hev) + { + const int8x16_t simple_lf_delta = + vandq_s8(delta0, vreinterpretq_s8_u8(simple_lf_mask)); + ApplyFilter2NoFlip(p0s, q0s, simple_lf_delta, &p0s, &q0s); + } + + // do_filter6 part (complex loopfilter on pixels without hev) + { + // we use: (mask & hev_mask) ^ mask = mask & !hev_mask + const uint8x16_t complex_lf_mask = veorq_u8(simple_lf_mask, mask); + const int8x16_t complex_lf_delta = + vandq_s8(delta0, vreinterpretq_s8_u8(complex_lf_mask)); + ApplyFilter6(p2s, p1s, p0s, q0s, q1s, q2s, complex_lf_delta, + op2, op1, op0, oq0, oq1, oq2); + } +} + +// on macroblock edges + +static void VFilter16(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + uint8x16_t p3, p2, p1, p0, q0, q1, q2, q3; + Load16x8(p, stride, &p3, &p2, &p1, &p0, &q0, &q1, &q2, &q3); + { + const uint8x16_t mask = NeedsFilter2(p3, p2, p1, p0, q0, q1, q2, q3, + ithresh, thresh); + const uint8x16_t hev_mask = NeedsHev(p1, p0, q0, q1, hev_thresh); + uint8x16_t op2, op1, op0, oq0, oq1, oq2; + DoFilter6(p2, p1, p0, q0, q1, q2, mask, hev_mask, + &op2, &op1, &op0, &oq0, &oq1, &oq2); + Store16x2(op2, op1, p - 2 * stride, stride); + Store16x2(op0, oq0, p + 0 * stride, stride); + Store16x2(oq1, oq2, p + 2 * stride, stride); + } +} + +static void HFilter16(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + uint8x16_t p3, p2, p1, p0, q0, q1, q2, q3; + Load8x16(p, stride, &p3, &p2, &p1, &p0, &q0, &q1, &q2, &q3); + { + const uint8x16_t mask = NeedsFilter2(p3, p2, p1, p0, q0, q1, q2, q3, + ithresh, thresh); + const uint8x16_t hev_mask = NeedsHev(p1, p0, q0, q1, hev_thresh); + uint8x16_t op2, op1, op0, oq0, oq1, oq2; + DoFilter6(p2, p1, p0, q0, q1, q2, mask, hev_mask, + &op2, &op1, &op0, &oq0, &oq1, &oq2); + Store2x16(op2, op1, p - 2, stride); + Store2x16(op0, oq0, p + 0, stride); + Store2x16(oq1, oq2, p + 2, stride); + } +} + +// on three inner edges +static void VFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + uint32_t k; + uint8x16_t p3, p2, p1, p0; + Load16x4(p + 2 * stride, stride, &p3, &p2, &p1, &p0); + for (k = 3; k != 0; --k) { + uint8x16_t q0, q1, q2, q3; + p += 4 * stride; + Load16x4(p + 2 * stride, stride, &q0, &q1, &q2, &q3); + { + const uint8x16_t mask = + NeedsFilter2(p3, p2, p1, p0, q0, q1, q2, q3, ithresh, thresh); + const uint8x16_t hev_mask = NeedsHev(p1, p0, q0, q1, hev_thresh); + // p3 and p2 are not just temporary variables here: they will be + // re-used for next span. And q2/q3 will become p1/p0 accordingly. + DoFilter4(p1, p0, q0, q1, mask, hev_mask, &p1, &p0, &p3, &p2); + Store16x4(p1, p0, p3, p2, p, stride); + p1 = q2; + p0 = q3; + } + } +} + +#if !defined(WORK_AROUND_GCC) +static void HFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + uint32_t k; + uint8x16_t p3, p2, p1, p0; + Load4x16(p + 2, stride, &p3, &p2, &p1, &p0); + for (k = 3; k != 0; --k) { + uint8x16_t q0, q1, q2, q3; + p += 4; + Load4x16(p + 2, stride, &q0, &q1, &q2, &q3); + { + const uint8x16_t mask = + NeedsFilter2(p3, p2, p1, p0, q0, q1, q2, q3, ithresh, thresh); + const uint8x16_t hev_mask = NeedsHev(p1, p0, q0, q1, hev_thresh); + DoFilter4(p1, p0, q0, q1, mask, hev_mask, &p1, &p0, &p3, &p2); + Store4x16(p1, p0, p3, p2, p, stride); + p1 = q2; + p0 = q3; + } + } +} +#endif // !WORK_AROUND_GCC + +// 8-pixels wide variant, for chroma filtering +static void VFilter8(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + uint8x16_t p3, p2, p1, p0, q0, q1, q2, q3; + Load8x8x2(u, v, stride, &p3, &p2, &p1, &p0, &q0, &q1, &q2, &q3); + { + const uint8x16_t mask = NeedsFilter2(p3, p2, p1, p0, q0, q1, q2, q3, + ithresh, thresh); + const uint8x16_t hev_mask = NeedsHev(p1, p0, q0, q1, hev_thresh); + uint8x16_t op2, op1, op0, oq0, oq1, oq2; + DoFilter6(p2, p1, p0, q0, q1, q2, mask, hev_mask, + &op2, &op1, &op0, &oq0, &oq1, &oq2); + Store8x2x2(op2, op1, u - 2 * stride, v - 2 * stride, stride); + Store8x2x2(op0, oq0, u + 0 * stride, v + 0 * stride, stride); + Store8x2x2(oq1, oq2, u + 2 * stride, v + 2 * stride, stride); + } +} +static void VFilter8i(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + uint8x16_t p3, p2, p1, p0, q0, q1, q2, q3; + u += 4 * stride; + v += 4 * stride; + Load8x8x2(u, v, stride, &p3, &p2, &p1, &p0, &q0, &q1, &q2, &q3); + { + const uint8x16_t mask = NeedsFilter2(p3, p2, p1, p0, q0, q1, q2, q3, + ithresh, thresh); + const uint8x16_t hev_mask = NeedsHev(p1, p0, q0, q1, hev_thresh); + uint8x16_t op1, op0, oq0, oq1; + DoFilter4(p1, p0, q0, q1, mask, hev_mask, &op1, &op0, &oq0, &oq1); + Store8x4x2(op1, op0, oq0, oq1, u, v, stride); + } +} + +#if !defined(WORK_AROUND_GCC) +static void HFilter8(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + uint8x16_t p3, p2, p1, p0, q0, q1, q2, q3; + Load8x8x2T(u, v, stride, &p3, &p2, &p1, &p0, &q0, &q1, &q2, &q3); + { + const uint8x16_t mask = NeedsFilter2(p3, p2, p1, p0, q0, q1, q2, q3, + ithresh, thresh); + const uint8x16_t hev_mask = NeedsHev(p1, p0, q0, q1, hev_thresh); + uint8x16_t op2, op1, op0, oq0, oq1, oq2; + DoFilter6(p2, p1, p0, q0, q1, q2, mask, hev_mask, + &op2, &op1, &op0, &oq0, &oq1, &oq2); + Store6x8x2(op2, op1, op0, oq0, oq1, oq2, u, v, stride); + } +} + +static void HFilter8i(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + uint8x16_t p3, p2, p1, p0, q0, q1, q2, q3; + u += 4; + v += 4; + Load8x8x2T(u, v, stride, &p3, &p2, &p1, &p0, &q0, &q1, &q2, &q3); + { + const uint8x16_t mask = NeedsFilter2(p3, p2, p1, p0, q0, q1, q2, q3, + ithresh, thresh); + const uint8x16_t hev_mask = NeedsHev(p1, p0, q0, q1, hev_thresh); + uint8x16_t op1, op0, oq0, oq1; + DoFilter4(p1, p0, q0, q1, mask, hev_mask, &op1, &op0, &oq0, &oq1); + Store4x8x2(op1, op0, oq0, oq1, u, v, stride); + } +} +#endif // !WORK_AROUND_GCC + +//----------------------------------------------------------------------------- +// Inverse transforms (Paragraph 14.4) + +// Technically these are unsigned but vqdmulh is only available in signed. +// vqdmulh returns high half (effectively >> 16) but also doubles the value, +// changing the >> 16 to >> 15 and requiring an additional >> 1. +// We use this to our advantage with kC2. The canonical value is 35468. +// However, the high bit is set so treating it as signed will give incorrect +// results. We avoid this by down shifting by 1 here to clear the highest bit. +// Combined with the doubling effect of vqdmulh we get >> 16. +// This can not be applied to kC1 because the lowest bit is set. Down shifting +// the constant would reduce precision. + +// libwebp uses a trick to avoid some extra addition that libvpx does. +// Instead of: +// temp2 = ip[12] + ((ip[12] * cospi8sqrt2minus1) >> 16); +// libwebp adds 1 << 16 to cospi8sqrt2minus1 (kC1). However, this causes the +// same issue with kC1 and vqdmulh that we work around by down shifting kC2 +static const int16_t kC1 = 20091; +static const int16_t kC2 = 17734; // half of kC2, actually. See comment above. + +#if defined(WEBP_USE_INTRINSICS) +static WEBP_INLINE void Transpose8x2(const int16x8_t in0, const int16x8_t in1, + int16x8x2_t* const out) { + // a0 a1 a2 a3 | b0 b1 b2 b3 => a0 b0 c0 d0 | a1 b1 c1 d1 + // c0 c1 c2 c3 | d0 d1 d2 d3 a2 b2 c2 d2 | a3 b3 c3 d3 + const int16x8x2_t tmp0 = vzipq_s16(in0, in1); // a0 c0 a1 c1 a2 c2 ... + // b0 d0 b1 d1 b2 d2 ... + *out = vzipq_s16(tmp0.val[0], tmp0.val[1]); +} + +static WEBP_INLINE void TransformPass(int16x8x2_t* const rows) { + // {rows} = in0 | in4 + // in8 | in12 + // B1 = in4 | in12 + const int16x8_t B1 = + vcombine_s16(vget_high_s16(rows->val[0]), vget_high_s16(rows->val[1])); + // C0 = kC1 * in4 | kC1 * in12 + // C1 = kC2 * in4 | kC2 * in12 + const int16x8_t C0 = vsraq_n_s16(B1, vqdmulhq_n_s16(B1, kC1), 1); + const int16x8_t C1 = vqdmulhq_n_s16(B1, kC2); + const int16x4_t a = vqadd_s16(vget_low_s16(rows->val[0]), + vget_low_s16(rows->val[1])); // in0 + in8 + const int16x4_t b = vqsub_s16(vget_low_s16(rows->val[0]), + vget_low_s16(rows->val[1])); // in0 - in8 + // c = kC2 * in4 - kC1 * in12 + // d = kC1 * in4 + kC2 * in12 + const int16x4_t c = vqsub_s16(vget_low_s16(C1), vget_high_s16(C0)); + const int16x4_t d = vqadd_s16(vget_low_s16(C0), vget_high_s16(C1)); + const int16x8_t D0 = vcombine_s16(a, b); // D0 = a | b + const int16x8_t D1 = vcombine_s16(d, c); // D1 = d | c + const int16x8_t E0 = vqaddq_s16(D0, D1); // a+d | b+c + const int16x8_t E_tmp = vqsubq_s16(D0, D1); // a-d | b-c + const int16x8_t E1 = vcombine_s16(vget_high_s16(E_tmp), vget_low_s16(E_tmp)); + Transpose8x2(E0, E1, rows); +} + +static void TransformOne(const int16_t* in, uint8_t* dst) { + int16x8x2_t rows; + INIT_VECTOR2(rows, vld1q_s16(in + 0), vld1q_s16(in + 8)); + TransformPass(&rows); + TransformPass(&rows); + Add4x4(rows.val[0], rows.val[1], dst); +} + +#else + +static void TransformOne(const int16_t* in, uint8_t* dst) { + const int kBPS = BPS; + // kC1, kC2. Padded because vld1.16 loads 8 bytes + const int16_t constants[4] = { kC1, kC2, 0, 0 }; /* Adapted from libvpx: vp8/common/arm/neon/shortidct4x4llm_neon.asm */ __asm__ volatile ( "vld1.16 {q1, q2}, [%[in]] \n" @@ -304,26 +1168,472 @@ static void TransformOneNEON(const int16_t *in, uint8_t *dst) { ); } -static void TransformTwoNEON(const int16_t* in, uint8_t* dst, int do_two) { - TransformOneNEON(in, dst); +#endif // WEBP_USE_INTRINSICS + +static void TransformTwo(const int16_t* in, uint8_t* dst, int do_two) { + TransformOne(in, dst); if (do_two) { - TransformOneNEON(in + 16, dst + 4); + TransformOne(in + 16, dst + 4); } } -extern void VP8DspInitNEON(void); +static void TransformDC(const int16_t* in, uint8_t* dst) { + const int16x8_t DC = vdupq_n_s16(in[0]); + Add4x4(DC, DC, dst); +} + +//------------------------------------------------------------------------------ + +#define STORE_WHT(dst, col, rows) do { \ + *dst = vgetq_lane_s32(rows.val[0], col); (dst) += 16; \ + *dst = vgetq_lane_s32(rows.val[1], col); (dst) += 16; \ + *dst = vgetq_lane_s32(rows.val[2], col); (dst) += 16; \ + *dst = vgetq_lane_s32(rows.val[3], col); (dst) += 16; \ +} while (0) + +static void TransformWHT(const int16_t* in, int16_t* out) { + int32x4x4_t tmp; -void VP8DspInitNEON(void) { - VP8Transform = TransformTwoNEON; + { + // Load the source. + const int16x4_t in00_03 = vld1_s16(in + 0); + const int16x4_t in04_07 = vld1_s16(in + 4); + const int16x4_t in08_11 = vld1_s16(in + 8); + const int16x4_t in12_15 = vld1_s16(in + 12); + const int32x4_t a0 = vaddl_s16(in00_03, in12_15); // in[0..3] + in[12..15] + const int32x4_t a1 = vaddl_s16(in04_07, in08_11); // in[4..7] + in[8..11] + const int32x4_t a2 = vsubl_s16(in04_07, in08_11); // in[4..7] - in[8..11] + const int32x4_t a3 = vsubl_s16(in00_03, in12_15); // in[0..3] - in[12..15] + tmp.val[0] = vaddq_s32(a0, a1); + tmp.val[1] = vaddq_s32(a3, a2); + tmp.val[2] = vsubq_s32(a0, a1); + tmp.val[3] = vsubq_s32(a3, a2); + // Arrange the temporary results column-wise. + tmp = Transpose4x4(tmp); + } + + { + const int32x4_t kCst3 = vdupq_n_s32(3); + const int32x4_t dc = vaddq_s32(tmp.val[0], kCst3); // add rounder + const int32x4_t a0 = vaddq_s32(dc, tmp.val[3]); + const int32x4_t a1 = vaddq_s32(tmp.val[1], tmp.val[2]); + const int32x4_t a2 = vsubq_s32(tmp.val[1], tmp.val[2]); + const int32x4_t a3 = vsubq_s32(dc, tmp.val[3]); + + tmp.val[0] = vaddq_s32(a0, a1); + tmp.val[1] = vaddq_s32(a3, a2); + tmp.val[2] = vsubq_s32(a0, a1); + tmp.val[3] = vsubq_s32(a3, a2); + + // right shift the results by 3. + tmp.val[0] = vshrq_n_s32(tmp.val[0], 3); + tmp.val[1] = vshrq_n_s32(tmp.val[1], 3); + tmp.val[2] = vshrq_n_s32(tmp.val[2], 3); + tmp.val[3] = vshrq_n_s32(tmp.val[3], 3); - VP8SimpleVFilter16 = SimpleVFilter16NEON; - VP8SimpleHFilter16 = SimpleHFilter16NEON; - VP8SimpleVFilter16i = SimpleVFilter16iNEON; - VP8SimpleHFilter16i = SimpleHFilter16iNEON; + STORE_WHT(out, 0, tmp); + STORE_WHT(out, 1, tmp); + STORE_WHT(out, 2, tmp); + STORE_WHT(out, 3, tmp); + } } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" +#undef STORE_WHT + +//------------------------------------------------------------------------------ + +#define MUL(a, b) (((a) * (b)) >> 16) +static void TransformAC3(const int16_t* in, uint8_t* dst) { + static const int kC1_full = 20091 + (1 << 16); + static const int kC2_full = 35468; + const int16x4_t A = vld1_dup_s16(in); + const int16x4_t c4 = vdup_n_s16(MUL(in[4], kC2_full)); + const int16x4_t d4 = vdup_n_s16(MUL(in[4], kC1_full)); + const int c1 = MUL(in[1], kC2_full); + const int d1 = MUL(in[1], kC1_full); + const uint64_t cd = (uint64_t)( d1 & 0xffff) << 0 | + (uint64_t)( c1 & 0xffff) << 16 | + (uint64_t)(-c1 & 0xffff) << 32 | + (uint64_t)(-d1 & 0xffff) << 48; + const int16x4_t CD = vcreate_s16(cd); + const int16x4_t B = vqadd_s16(A, CD); + const int16x8_t m0_m1 = vcombine_s16(vqadd_s16(B, d4), vqadd_s16(B, c4)); + const int16x8_t m2_m3 = vcombine_s16(vqsub_s16(B, c4), vqsub_s16(B, d4)); + Add4x4(m0_m1, m2_m3, dst); +} +#undef MUL + +//------------------------------------------------------------------------------ +// 4x4 + +static void DC4(uint8_t* dst) { // DC + const uint8x8_t A = vld1_u8(dst - BPS); // top row + const uint16x4_t p0 = vpaddl_u8(A); // cascading summation of the top + const uint16x4_t p1 = vpadd_u16(p0, p0); + const uint16x8_t L0 = vmovl_u8(vld1_u8(dst + 0 * BPS - 1)); + const uint16x8_t L1 = vmovl_u8(vld1_u8(dst + 1 * BPS - 1)); + const uint16x8_t L2 = vmovl_u8(vld1_u8(dst + 2 * BPS - 1)); + const uint16x8_t L3 = vmovl_u8(vld1_u8(dst + 3 * BPS - 1)); + const uint16x8_t s0 = vaddq_u16(L0, L1); + const uint16x8_t s1 = vaddq_u16(L2, L3); + const uint16x8_t s01 = vaddq_u16(s0, s1); + const uint16x8_t sum = vaddq_u16(s01, vcombine_u16(p1, p1)); + const uint8x8_t dc0 = vrshrn_n_u16(sum, 3); // (sum + 4) >> 3 + const uint8x8_t dc = vdup_lane_u8(dc0, 0); + int i; + for (i = 0; i < 4; ++i) { + vst1_lane_u32((uint32_t*)(dst + i * BPS), vreinterpret_u32_u8(dc), 0); + } +} + +// TrueMotion (4x4 + 8x8) +static WEBP_INLINE void TrueMotion(uint8_t* dst, int size) { + const uint8x8_t TL = vld1_dup_u8(dst - BPS - 1); // top-left pixel 'A[-1]' + const uint8x8_t T = vld1_u8(dst - BPS); // top row 'A[0..3]' + const int16x8_t d = vreinterpretq_s16_u16(vsubl_u8(T, TL)); // A[c] - A[-1] + int y; + for (y = 0; y < size; y += 4) { + // left edge + const int16x8_t L0 = ConvertU8ToS16(vld1_dup_u8(dst + 0 * BPS - 1)); + const int16x8_t L1 = ConvertU8ToS16(vld1_dup_u8(dst + 1 * BPS - 1)); + const int16x8_t L2 = ConvertU8ToS16(vld1_dup_u8(dst + 2 * BPS - 1)); + const int16x8_t L3 = ConvertU8ToS16(vld1_dup_u8(dst + 3 * BPS - 1)); + const int16x8_t r0 = vaddq_s16(L0, d); // L[r] + A[c] - A[-1] + const int16x8_t r1 = vaddq_s16(L1, d); + const int16x8_t r2 = vaddq_s16(L2, d); + const int16x8_t r3 = vaddq_s16(L3, d); + // Saturate and store the result. + const uint32x2_t r0_u32 = vreinterpret_u32_u8(vqmovun_s16(r0)); + const uint32x2_t r1_u32 = vreinterpret_u32_u8(vqmovun_s16(r1)); + const uint32x2_t r2_u32 = vreinterpret_u32_u8(vqmovun_s16(r2)); + const uint32x2_t r3_u32 = vreinterpret_u32_u8(vqmovun_s16(r3)); + if (size == 4) { + vst1_lane_u32((uint32_t*)(dst + 0 * BPS), r0_u32, 0); + vst1_lane_u32((uint32_t*)(dst + 1 * BPS), r1_u32, 0); + vst1_lane_u32((uint32_t*)(dst + 2 * BPS), r2_u32, 0); + vst1_lane_u32((uint32_t*)(dst + 3 * BPS), r3_u32, 0); + } else { + vst1_u32((uint32_t*)(dst + 0 * BPS), r0_u32); + vst1_u32((uint32_t*)(dst + 1 * BPS), r1_u32); + vst1_u32((uint32_t*)(dst + 2 * BPS), r2_u32); + vst1_u32((uint32_t*)(dst + 3 * BPS), r3_u32); + } + dst += 4 * BPS; + } +} + +static void TM4(uint8_t* dst) { TrueMotion(dst, 4); } + +static void VE4(uint8_t* dst) { // vertical + // NB: avoid vld1_u64 here as an alignment hint may be added -> SIGBUS. + const uint64x1_t A0 = vreinterpret_u64_u8(vld1_u8(dst - BPS - 1)); // top row + const uint64x1_t A1 = vshr_n_u64(A0, 8); + const uint64x1_t A2 = vshr_n_u64(A0, 16); + const uint8x8_t ABCDEFGH = vreinterpret_u8_u64(A0); + const uint8x8_t BCDEFGH0 = vreinterpret_u8_u64(A1); + const uint8x8_t CDEFGH00 = vreinterpret_u8_u64(A2); + const uint8x8_t b = vhadd_u8(ABCDEFGH, CDEFGH00); + const uint8x8_t avg = vrhadd_u8(b, BCDEFGH0); + int i; + for (i = 0; i < 4; ++i) { + vst1_lane_u32((uint32_t*)(dst + i * BPS), vreinterpret_u32_u8(avg), 0); + } +} + +static void RD4(uint8_t* dst) { // Down-right + const uint8x8_t XABCD_u8 = vld1_u8(dst - BPS - 1); + const uint64x1_t XABCD = vreinterpret_u64_u8(XABCD_u8); + const uint64x1_t ____XABC = vshl_n_u64(XABCD, 32); + const uint32_t I = dst[-1 + 0 * BPS]; + const uint32_t J = dst[-1 + 1 * BPS]; + const uint32_t K = dst[-1 + 2 * BPS]; + const uint32_t L = dst[-1 + 3 * BPS]; + const uint64x1_t LKJI____ = vcreate_u64(L | (K << 8) | (J << 16) | (I << 24)); + const uint64x1_t LKJIXABC = vorr_u64(LKJI____, ____XABC); + const uint8x8_t KJIXABC_ = vreinterpret_u8_u64(vshr_n_u64(LKJIXABC, 8)); + const uint8x8_t JIXABC__ = vreinterpret_u8_u64(vshr_n_u64(LKJIXABC, 16)); + const uint8_t D = vget_lane_u8(XABCD_u8, 4); + const uint8x8_t JIXABCD_ = vset_lane_u8(D, JIXABC__, 6); + const uint8x8_t LKJIXABC_u8 = vreinterpret_u8_u64(LKJIXABC); + const uint8x8_t avg1 = vhadd_u8(JIXABCD_, LKJIXABC_u8); + const uint8x8_t avg2 = vrhadd_u8(avg1, KJIXABC_); + const uint64x1_t avg2_u64 = vreinterpret_u64_u8(avg2); + const uint32x2_t r3 = vreinterpret_u32_u8(avg2); + const uint32x2_t r2 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 8)); + const uint32x2_t r1 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 16)); + const uint32x2_t r0 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 24)); + vst1_lane_u32((uint32_t*)(dst + 0 * BPS), r0, 0); + vst1_lane_u32((uint32_t*)(dst + 1 * BPS), r1, 0); + vst1_lane_u32((uint32_t*)(dst + 2 * BPS), r2, 0); + vst1_lane_u32((uint32_t*)(dst + 3 * BPS), r3, 0); +} + +static void LD4(uint8_t* dst) { // Down-left + // Note using the same shift trick as VE4() is slower here. + const uint8x8_t ABCDEFGH = vld1_u8(dst - BPS + 0); + const uint8x8_t BCDEFGH0 = vld1_u8(dst - BPS + 1); + const uint8x8_t CDEFGH00 = vld1_u8(dst - BPS + 2); + const uint8x8_t CDEFGHH0 = vset_lane_u8(dst[-BPS + 7], CDEFGH00, 6); + const uint8x8_t avg1 = vhadd_u8(ABCDEFGH, CDEFGHH0); + const uint8x8_t avg2 = vrhadd_u8(avg1, BCDEFGH0); + const uint64x1_t avg2_u64 = vreinterpret_u64_u8(avg2); + const uint32x2_t r0 = vreinterpret_u32_u8(avg2); + const uint32x2_t r1 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 8)); + const uint32x2_t r2 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 16)); + const uint32x2_t r3 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 24)); + vst1_lane_u32((uint32_t*)(dst + 0 * BPS), r0, 0); + vst1_lane_u32((uint32_t*)(dst + 1 * BPS), r1, 0); + vst1_lane_u32((uint32_t*)(dst + 2 * BPS), r2, 0); + vst1_lane_u32((uint32_t*)(dst + 3 * BPS), r3, 0); +} + +//------------------------------------------------------------------------------ +// Chroma + +static void VE8uv(uint8_t* dst) { // vertical + const uint8x8_t top = vld1_u8(dst - BPS); + int j; + for (j = 0; j < 8; ++j) { + vst1_u8(dst + j * BPS, top); + } +} + +static void HE8uv(uint8_t* dst) { // horizontal + int j; + for (j = 0; j < 8; ++j) { + const uint8x8_t left = vld1_dup_u8(dst - 1); + vst1_u8(dst, left); + dst += BPS; + } +} + +static WEBP_INLINE void DC8(uint8_t* dst, int do_top, int do_left) { + uint16x8_t sum_top; + uint16x8_t sum_left; + uint8x8_t dc0; + + if (do_top) { + const uint8x8_t A = vld1_u8(dst - BPS); // top row + const uint16x4_t p0 = vpaddl_u8(A); // cascading summation of the top + const uint16x4_t p1 = vpadd_u16(p0, p0); + const uint16x4_t p2 = vpadd_u16(p1, p1); + sum_top = vcombine_u16(p2, p2); + } + + if (do_left) { + const uint16x8_t L0 = vmovl_u8(vld1_u8(dst + 0 * BPS - 1)); + const uint16x8_t L1 = vmovl_u8(vld1_u8(dst + 1 * BPS - 1)); + const uint16x8_t L2 = vmovl_u8(vld1_u8(dst + 2 * BPS - 1)); + const uint16x8_t L3 = vmovl_u8(vld1_u8(dst + 3 * BPS - 1)); + const uint16x8_t L4 = vmovl_u8(vld1_u8(dst + 4 * BPS - 1)); + const uint16x8_t L5 = vmovl_u8(vld1_u8(dst + 5 * BPS - 1)); + const uint16x8_t L6 = vmovl_u8(vld1_u8(dst + 6 * BPS - 1)); + const uint16x8_t L7 = vmovl_u8(vld1_u8(dst + 7 * BPS - 1)); + const uint16x8_t s0 = vaddq_u16(L0, L1); + const uint16x8_t s1 = vaddq_u16(L2, L3); + const uint16x8_t s2 = vaddq_u16(L4, L5); + const uint16x8_t s3 = vaddq_u16(L6, L7); + const uint16x8_t s01 = vaddq_u16(s0, s1); + const uint16x8_t s23 = vaddq_u16(s2, s3); + sum_left = vaddq_u16(s01, s23); + } + + if (do_top && do_left) { + const uint16x8_t sum = vaddq_u16(sum_left, sum_top); + dc0 = vrshrn_n_u16(sum, 4); + } else if (do_top) { + dc0 = vrshrn_n_u16(sum_top, 3); + } else if (do_left) { + dc0 = vrshrn_n_u16(sum_left, 3); + } else { + dc0 = vdup_n_u8(0x80); + } + + { + const uint8x8_t dc = vdup_lane_u8(dc0, 0); + int i; + for (i = 0; i < 8; ++i) { + vst1_u32((uint32_t*)(dst + i * BPS), vreinterpret_u32_u8(dc)); + } + } +} + +static void DC8uv(uint8_t* dst) { DC8(dst, 1, 1); } +static void DC8uvNoTop(uint8_t* dst) { DC8(dst, 0, 1); } +static void DC8uvNoLeft(uint8_t* dst) { DC8(dst, 1, 0); } +static void DC8uvNoTopLeft(uint8_t* dst) { DC8(dst, 0, 0); } + +static void TM8uv(uint8_t* dst) { TrueMotion(dst, 8); } + +//------------------------------------------------------------------------------ +// 16x16 + +static void VE16(uint8_t* dst) { // vertical + const uint8x16_t top = vld1q_u8(dst - BPS); + int j; + for (j = 0; j < 16; ++j) { + vst1q_u8(dst + j * BPS, top); + } +} + +static void HE16(uint8_t* dst) { // horizontal + int j; + for (j = 0; j < 16; ++j) { + const uint8x16_t left = vld1q_dup_u8(dst - 1); + vst1q_u8(dst, left); + dst += BPS; + } +} + +static WEBP_INLINE void DC16(uint8_t* dst, int do_top, int do_left) { + uint16x8_t sum_top; + uint16x8_t sum_left; + uint8x8_t dc0; + + if (do_top) { + const uint8x16_t A = vld1q_u8(dst - BPS); // top row + const uint16x8_t p0 = vpaddlq_u8(A); // cascading summation of the top + const uint16x4_t p1 = vadd_u16(vget_low_u16(p0), vget_high_u16(p0)); + const uint16x4_t p2 = vpadd_u16(p1, p1); + const uint16x4_t p3 = vpadd_u16(p2, p2); + sum_top = vcombine_u16(p3, p3); + } + + if (do_left) { + int i; + sum_left = vdupq_n_u16(0); + for (i = 0; i < 16; i += 8) { + const uint16x8_t L0 = vmovl_u8(vld1_u8(dst + (i + 0) * BPS - 1)); + const uint16x8_t L1 = vmovl_u8(vld1_u8(dst + (i + 1) * BPS - 1)); + const uint16x8_t L2 = vmovl_u8(vld1_u8(dst + (i + 2) * BPS - 1)); + const uint16x8_t L3 = vmovl_u8(vld1_u8(dst + (i + 3) * BPS - 1)); + const uint16x8_t L4 = vmovl_u8(vld1_u8(dst + (i + 4) * BPS - 1)); + const uint16x8_t L5 = vmovl_u8(vld1_u8(dst + (i + 5) * BPS - 1)); + const uint16x8_t L6 = vmovl_u8(vld1_u8(dst + (i + 6) * BPS - 1)); + const uint16x8_t L7 = vmovl_u8(vld1_u8(dst + (i + 7) * BPS - 1)); + const uint16x8_t s0 = vaddq_u16(L0, L1); + const uint16x8_t s1 = vaddq_u16(L2, L3); + const uint16x8_t s2 = vaddq_u16(L4, L5); + const uint16x8_t s3 = vaddq_u16(L6, L7); + const uint16x8_t s01 = vaddq_u16(s0, s1); + const uint16x8_t s23 = vaddq_u16(s2, s3); + const uint16x8_t sum = vaddq_u16(s01, s23); + sum_left = vaddq_u16(sum_left, sum); + } + } + + if (do_top && do_left) { + const uint16x8_t sum = vaddq_u16(sum_left, sum_top); + dc0 = vrshrn_n_u16(sum, 5); + } else if (do_top) { + dc0 = vrshrn_n_u16(sum_top, 4); + } else if (do_left) { + dc0 = vrshrn_n_u16(sum_left, 4); + } else { + dc0 = vdup_n_u8(0x80); + } + + { + const uint8x16_t dc = vdupq_lane_u8(dc0, 0); + int i; + for (i = 0; i < 16; ++i) { + vst1q_u8(dst + i * BPS, dc); + } + } +} + +static void DC16TopLeft(uint8_t* dst) { DC16(dst, 1, 1); } +static void DC16NoTop(uint8_t* dst) { DC16(dst, 0, 1); } +static void DC16NoLeft(uint8_t* dst) { DC16(dst, 1, 0); } +static void DC16NoTopLeft(uint8_t* dst) { DC16(dst, 0, 0); } + +static void TM16(uint8_t* dst) { + const uint8x8_t TL = vld1_dup_u8(dst - BPS - 1); // top-left pixel 'A[-1]' + const uint8x16_t T = vld1q_u8(dst - BPS); // top row 'A[0..15]' + // A[c] - A[-1] + const int16x8_t d_lo = vreinterpretq_s16_u16(vsubl_u8(vget_low_u8(T), TL)); + const int16x8_t d_hi = vreinterpretq_s16_u16(vsubl_u8(vget_high_u8(T), TL)); + int y; + for (y = 0; y < 16; y += 4) { + // left edge + const int16x8_t L0 = ConvertU8ToS16(vld1_dup_u8(dst + 0 * BPS - 1)); + const int16x8_t L1 = ConvertU8ToS16(vld1_dup_u8(dst + 1 * BPS - 1)); + const int16x8_t L2 = ConvertU8ToS16(vld1_dup_u8(dst + 2 * BPS - 1)); + const int16x8_t L3 = ConvertU8ToS16(vld1_dup_u8(dst + 3 * BPS - 1)); + const int16x8_t r0_lo = vaddq_s16(L0, d_lo); // L[r] + A[c] - A[-1] + const int16x8_t r1_lo = vaddq_s16(L1, d_lo); + const int16x8_t r2_lo = vaddq_s16(L2, d_lo); + const int16x8_t r3_lo = vaddq_s16(L3, d_lo); + const int16x8_t r0_hi = vaddq_s16(L0, d_hi); + const int16x8_t r1_hi = vaddq_s16(L1, d_hi); + const int16x8_t r2_hi = vaddq_s16(L2, d_hi); + const int16x8_t r3_hi = vaddq_s16(L3, d_hi); + // Saturate and store the result. + const uint8x16_t row0 = vcombine_u8(vqmovun_s16(r0_lo), vqmovun_s16(r0_hi)); + const uint8x16_t row1 = vcombine_u8(vqmovun_s16(r1_lo), vqmovun_s16(r1_hi)); + const uint8x16_t row2 = vcombine_u8(vqmovun_s16(r2_lo), vqmovun_s16(r2_hi)); + const uint8x16_t row3 = vcombine_u8(vqmovun_s16(r3_lo), vqmovun_s16(r3_hi)); + vst1q_u8(dst + 0 * BPS, row0); + vst1q_u8(dst + 1 * BPS, row1); + vst1q_u8(dst + 2 * BPS, row2); + vst1q_u8(dst + 3 * BPS, row3); + dst += 4 * BPS; + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8DspInitNEON(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitNEON(void) { + VP8Transform = TransformTwo; + VP8TransformAC3 = TransformAC3; + VP8TransformDC = TransformDC; + VP8TransformWHT = TransformWHT; + + VP8VFilter16 = VFilter16; + VP8VFilter16i = VFilter16i; + VP8HFilter16 = HFilter16; +#if !defined(WORK_AROUND_GCC) + VP8HFilter16i = HFilter16i; #endif + VP8VFilter8 = VFilter8; + VP8VFilter8i = VFilter8i; +#if !defined(WORK_AROUND_GCC) + VP8HFilter8 = HFilter8; + VP8HFilter8i = HFilter8i; +#endif + VP8SimpleVFilter16 = SimpleVFilter16; + VP8SimpleHFilter16 = SimpleHFilter16; + VP8SimpleVFilter16i = SimpleVFilter16i; + VP8SimpleHFilter16i = SimpleHFilter16i; + + VP8PredLuma4[0] = DC4; + VP8PredLuma4[1] = TM4; + VP8PredLuma4[2] = VE4; + VP8PredLuma4[4] = RD4; + VP8PredLuma4[6] = LD4; + + VP8PredLuma16[0] = DC16TopLeft; + VP8PredLuma16[1] = TM16; + VP8PredLuma16[2] = VE16; + VP8PredLuma16[3] = HE16; + VP8PredLuma16[4] = DC16NoTop; + VP8PredLuma16[5] = DC16NoLeft; + VP8PredLuma16[6] = DC16NoTopLeft; + + VP8PredChroma8[0] = DC8uv; + VP8PredChroma8[1] = TM8uv; + VP8PredChroma8[2] = VE8uv; + VP8PredChroma8[3] = HE8uv; + VP8PredChroma8[4] = DC8uvNoTop; + VP8PredChroma8[5] = DC8uvNoLeft; + VP8PredChroma8[6] = DC8uvNoTopLeft; +} + +#else // !WEBP_USE_NEON + +WEBP_DSP_INIT_STUB(VP8DspInitNEON) -#endif // WEBP_USE_NEON +#endif // WEBP_USE_NEON diff --git a/drivers/webp/dsp/dec_sse2.c b/drivers/webp/dsp/dec_sse2.c index 472b68ecb8..d4838b9210 100644 --- a/drivers/webp/dsp/dec_sse2.c +++ b/drivers/webp/dsp/dec_sse2.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // SSE2 version of some decoding functions (idct, loop filtering). @@ -14,17 +16,17 @@ #if defined(WEBP_USE_SSE2) +// The 3-coeff sparse transform in SSE2 is not really faster than the plain-C +// one it seems => disable it by default. Uncomment the following to enable: +// #define USE_TRANSFORM_AC3 + #include <emmintrin.h> #include "../dec/vp8i.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // Transforms (Paragraph 14.4) -static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { +static void Transform(const int16_t* in, uint8_t* dst, int do_two) { // This implementation makes use of 16-bit fixed point versions of two // multiply constants: // K1 = sqrt(2) * cos (pi/8) ~= 85627 / 2^16 @@ -50,19 +52,19 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { // vectors will just contain random value we'll never use nor store. __m128i in0, in1, in2, in3; { - in0 = _mm_loadl_epi64((__m128i*)&in[0]); - in1 = _mm_loadl_epi64((__m128i*)&in[4]); - in2 = _mm_loadl_epi64((__m128i*)&in[8]); - in3 = _mm_loadl_epi64((__m128i*)&in[12]); + in0 = _mm_loadl_epi64((const __m128i*)&in[0]); + in1 = _mm_loadl_epi64((const __m128i*)&in[4]); + in2 = _mm_loadl_epi64((const __m128i*)&in[8]); + in3 = _mm_loadl_epi64((const __m128i*)&in[12]); // a00 a10 a20 a30 x x x x // a01 a11 a21 a31 x x x x // a02 a12 a22 a32 x x x x // a03 a13 a23 a33 x x x x if (do_two) { - const __m128i inB0 = _mm_loadl_epi64((__m128i*)&in[16]); - const __m128i inB1 = _mm_loadl_epi64((__m128i*)&in[20]); - const __m128i inB2 = _mm_loadl_epi64((__m128i*)&in[24]); - const __m128i inB3 = _mm_loadl_epi64((__m128i*)&in[28]); + const __m128i inB0 = _mm_loadl_epi64((const __m128i*)&in[16]); + const __m128i inB1 = _mm_loadl_epi64((const __m128i*)&in[20]); + const __m128i inB2 = _mm_loadl_epi64((const __m128i*)&in[24]); + const __m128i inB3 = _mm_loadl_epi64((const __m128i*)&in[28]); in0 = _mm_unpacklo_epi64(in0, inB0); in1 = _mm_unpacklo_epi64(in1, inB1); in2 = _mm_unpacklo_epi64(in2, inB2); @@ -194,21 +196,21 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { // Add inverse transform to 'dst' and store. { - const __m128i zero = _mm_set1_epi16(0); + const __m128i zero = _mm_setzero_si128(); // Load the reference(s). __m128i dst0, dst1, dst2, dst3; if (do_two) { // Load eight bytes/pixels per line. - dst0 = _mm_loadl_epi64((__m128i*)&dst[0 * BPS]); - dst1 = _mm_loadl_epi64((__m128i*)&dst[1 * BPS]); - dst2 = _mm_loadl_epi64((__m128i*)&dst[2 * BPS]); - dst3 = _mm_loadl_epi64((__m128i*)&dst[3 * BPS]); + dst0 = _mm_loadl_epi64((__m128i*)(dst + 0 * BPS)); + dst1 = _mm_loadl_epi64((__m128i*)(dst + 1 * BPS)); + dst2 = _mm_loadl_epi64((__m128i*)(dst + 2 * BPS)); + dst3 = _mm_loadl_epi64((__m128i*)(dst + 3 * BPS)); } else { // Load four bytes/pixels per line. - dst0 = _mm_cvtsi32_si128(*(int*)&dst[0 * BPS]); - dst1 = _mm_cvtsi32_si128(*(int*)&dst[1 * BPS]); - dst2 = _mm_cvtsi32_si128(*(int*)&dst[2 * BPS]); - dst3 = _mm_cvtsi32_si128(*(int*)&dst[3 * BPS]); + dst0 = _mm_cvtsi32_si128(*(int*)(dst + 0 * BPS)); + dst1 = _mm_cvtsi32_si128(*(int*)(dst + 1 * BPS)); + dst2 = _mm_cvtsi32_si128(*(int*)(dst + 2 * BPS)); + dst3 = _mm_cvtsi32_si128(*(int*)(dst + 3 * BPS)); } // Convert to 16b. dst0 = _mm_unpacklo_epi8(dst0, zero); @@ -228,20 +230,66 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { // Store the results. if (do_two) { // Store eight bytes/pixels per line. - _mm_storel_epi64((__m128i*)&dst[0 * BPS], dst0); - _mm_storel_epi64((__m128i*)&dst[1 * BPS], dst1); - _mm_storel_epi64((__m128i*)&dst[2 * BPS], dst2); - _mm_storel_epi64((__m128i*)&dst[3 * BPS], dst3); + _mm_storel_epi64((__m128i*)(dst + 0 * BPS), dst0); + _mm_storel_epi64((__m128i*)(dst + 1 * BPS), dst1); + _mm_storel_epi64((__m128i*)(dst + 2 * BPS), dst2); + _mm_storel_epi64((__m128i*)(dst + 3 * BPS), dst3); } else { // Store four bytes/pixels per line. - *((int32_t *)&dst[0 * BPS]) = _mm_cvtsi128_si32(dst0); - *((int32_t *)&dst[1 * BPS]) = _mm_cvtsi128_si32(dst1); - *((int32_t *)&dst[2 * BPS]) = _mm_cvtsi128_si32(dst2); - *((int32_t *)&dst[3 * BPS]) = _mm_cvtsi128_si32(dst3); + *(int*)(dst + 0 * BPS) = _mm_cvtsi128_si32(dst0); + *(int*)(dst + 1 * BPS) = _mm_cvtsi128_si32(dst1); + *(int*)(dst + 2 * BPS) = _mm_cvtsi128_si32(dst2); + *(int*)(dst + 3 * BPS) = _mm_cvtsi128_si32(dst3); } } } +#if defined(USE_TRANSFORM_AC3) +#define MUL(a, b) (((a) * (b)) >> 16) +static void TransformAC3(const int16_t* in, uint8_t* dst) { + static const int kC1 = 20091 + (1 << 16); + static const int kC2 = 35468; + const __m128i A = _mm_set1_epi16(in[0] + 4); + const __m128i c4 = _mm_set1_epi16(MUL(in[4], kC2)); + const __m128i d4 = _mm_set1_epi16(MUL(in[4], kC1)); + const int c1 = MUL(in[1], kC2); + const int d1 = MUL(in[1], kC1); + const __m128i CD = _mm_set_epi16(0, 0, 0, 0, -d1, -c1, c1, d1); + const __m128i B = _mm_adds_epi16(A, CD); + const __m128i m0 = _mm_adds_epi16(B, d4); + const __m128i m1 = _mm_adds_epi16(B, c4); + const __m128i m2 = _mm_subs_epi16(B, c4); + const __m128i m3 = _mm_subs_epi16(B, d4); + const __m128i zero = _mm_setzero_si128(); + // Load the source pixels. + __m128i dst0 = _mm_cvtsi32_si128(*(int*)(dst + 0 * BPS)); + __m128i dst1 = _mm_cvtsi32_si128(*(int*)(dst + 1 * BPS)); + __m128i dst2 = _mm_cvtsi32_si128(*(int*)(dst + 2 * BPS)); + __m128i dst3 = _mm_cvtsi32_si128(*(int*)(dst + 3 * BPS)); + // Convert to 16b. + dst0 = _mm_unpacklo_epi8(dst0, zero); + dst1 = _mm_unpacklo_epi8(dst1, zero); + dst2 = _mm_unpacklo_epi8(dst2, zero); + dst3 = _mm_unpacklo_epi8(dst3, zero); + // Add the inverse transform. + dst0 = _mm_adds_epi16(dst0, _mm_srai_epi16(m0, 3)); + dst1 = _mm_adds_epi16(dst1, _mm_srai_epi16(m1, 3)); + dst2 = _mm_adds_epi16(dst2, _mm_srai_epi16(m2, 3)); + dst3 = _mm_adds_epi16(dst3, _mm_srai_epi16(m3, 3)); + // Unsigned saturate to 8b. + dst0 = _mm_packus_epi16(dst0, dst0); + dst1 = _mm_packus_epi16(dst1, dst1); + dst2 = _mm_packus_epi16(dst2, dst2); + dst3 = _mm_packus_epi16(dst3, dst3); + // Store the results. + *(int*)(dst + 0 * BPS) = _mm_cvtsi128_si32(dst0); + *(int*)(dst + 1 * BPS) = _mm_cvtsi128_si32(dst1); + *(int*)(dst + 2 * BPS) = _mm_cvtsi128_si32(dst2); + *(int*)(dst + 3 * BPS) = _mm_cvtsi128_si32(dst3); +} +#undef MUL +#endif // USE_TRANSFORM_AC3 + //------------------------------------------------------------------------------ // Loop Filter (Paragraph 15) @@ -250,20 +298,14 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { _mm_subs_epu8((q), (p)), \ _mm_subs_epu8((p), (q))) -// Shift each byte of "a" by N bits while preserving by the sign bit. -// -// It first shifts the lower bytes of the words and then the upper bytes and -// then merges the results together. -#define SIGNED_SHIFT_N(a, N) { \ - __m128i t = a; \ - t = _mm_slli_epi16(t, 8); \ - t = _mm_srai_epi16(t, N); \ - t = _mm_srli_epi16(t, 8); \ - \ - a = _mm_srai_epi16(a, N + 8); \ - a = _mm_slli_epi16(a, 8); \ - \ - a = _mm_or_si128(t, a); \ +// Shift each byte of "x" by 3 bits while preserving by the sign bit. +static WEBP_INLINE void SignedShift8b(__m128i* const x) { + const __m128i zero = _mm_setzero_si128(); + const __m128i lo_0 = _mm_unpacklo_epi8(zero, *x); + const __m128i hi_0 = _mm_unpackhi_epi8(zero, *x); + const __m128i lo_1 = _mm_srai_epi16(lo_0, 3 + 8); + const __m128i hi_1 = _mm_srai_epi16(hi_0, 3 + 8); + *x = _mm_packs_epi16(lo_1, hi_1); } #define FLIP_SIGN_BIT2(a, b) { \ @@ -276,103 +318,124 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { FLIP_SIGN_BIT2(c, d); \ } -#define GET_NOTHEV(p1, p0, q0, q1, hev_thresh, not_hev) { \ - const __m128i zero = _mm_setzero_si128(); \ - const __m128i t1 = MM_ABS(p1, p0); \ - const __m128i t2 = MM_ABS(q1, q0); \ - \ - const __m128i h = _mm_set1_epi8(hev_thresh); \ - const __m128i t3 = _mm_subs_epu8(t1, h); /* abs(p1 - p0) - hev_tresh */ \ - const __m128i t4 = _mm_subs_epu8(t2, h); /* abs(q1 - q0) - hev_tresh */ \ - \ - not_hev = _mm_or_si128(t3, t4); \ - not_hev = _mm_cmpeq_epi8(not_hev, zero); /* not_hev <= t1 && not_hev <= t2 */\ -} - -#define GET_BASE_DELTA(p1, p0, q0, q1, o) { \ - const __m128i qp0 = _mm_subs_epi8(q0, p0); /* q0 - p0 */ \ - o = _mm_subs_epi8(p1, q1); /* p1 - q1 */ \ - o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 1 * (q0 - p0) */ \ - o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 2 * (q0 - p0) */ \ - o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 3 * (q0 - p0) */ \ -} - -#define DO_SIMPLE_FILTER(p0, q0, fl) { \ - const __m128i three = _mm_set1_epi8(3); \ - const __m128i four = _mm_set1_epi8(4); \ - __m128i v3 = _mm_adds_epi8(fl, three); \ - __m128i v4 = _mm_adds_epi8(fl, four); \ - \ - /* Do +4 side */ \ - SIGNED_SHIFT_N(v4, 3); /* v4 >> 3 */ \ - q0 = _mm_subs_epi8(q0, v4); /* q0 -= v4 */ \ - \ - /* Now do +3 side */ \ - SIGNED_SHIFT_N(v3, 3); /* v3 >> 3 */ \ - p0 = _mm_adds_epi8(p0, v3); /* p0 += v3 */ \ +// input/output is uint8_t +static WEBP_INLINE void GetNotHEV(const __m128i* const p1, + const __m128i* const p0, + const __m128i* const q0, + const __m128i* const q1, + int hev_thresh, __m128i* const not_hev) { + const __m128i zero = _mm_setzero_si128(); + const __m128i t_1 = MM_ABS(*p1, *p0); + const __m128i t_2 = MM_ABS(*q1, *q0); + + const __m128i h = _mm_set1_epi8(hev_thresh); + const __m128i t_max = _mm_max_epu8(t_1, t_2); + + const __m128i t_max_h = _mm_subs_epu8(t_max, h); + *not_hev = _mm_cmpeq_epi8(t_max_h, zero); // not_hev <= t1 && not_hev <= t2 } -// Updates values of 2 pixels at MB edge during complex filtering. -// Update operations: -// q = q - a and p = p + a; where a = [(a_hi >> 7), (a_lo >> 7)] -#define UPDATE_2PIXELS(pi, qi, a_lo, a_hi) { \ - const __m128i a_lo7 = _mm_srai_epi16(a_lo, 7); \ - const __m128i a_hi7 = _mm_srai_epi16(a_hi, 7); \ - const __m128i a = _mm_packs_epi16(a_lo7, a_hi7); \ - pi = _mm_adds_epi8(pi, a); \ - qi = _mm_subs_epi8(qi, a); \ +// input pixels are int8_t +static WEBP_INLINE void GetBaseDelta(const __m128i* const p1, + const __m128i* const p0, + const __m128i* const q0, + const __m128i* const q1, + __m128i* const delta) { + // beware of addition order, for saturation! + const __m128i p1_q1 = _mm_subs_epi8(*p1, *q1); // p1 - q1 + const __m128i q0_p0 = _mm_subs_epi8(*q0, *p0); // q0 - p0 + const __m128i s1 = _mm_adds_epi8(p1_q1, q0_p0); // p1 - q1 + 1 * (q0 - p0) + const __m128i s2 = _mm_adds_epi8(q0_p0, s1); // p1 - q1 + 2 * (q0 - p0) + const __m128i s3 = _mm_adds_epi8(q0_p0, s2); // p1 - q1 + 3 * (q0 - p0) + *delta = s3; } -static void NeedsFilter(const __m128i* p1, const __m128i* p0, const __m128i* q0, - const __m128i* q1, int thresh, __m128i *mask) { - __m128i t1 = MM_ABS(*p1, *q1); // abs(p1 - q1) - *mask = _mm_set1_epi8(0xFE); - t1 = _mm_and_si128(t1, *mask); // set lsb of each byte to zero - t1 = _mm_srli_epi16(t1, 1); // abs(p1 - q1) / 2 +// input and output are int8_t +static WEBP_INLINE void DoSimpleFilter(__m128i* const p0, __m128i* const q0, + const __m128i* const fl) { + const __m128i k3 = _mm_set1_epi8(3); + const __m128i k4 = _mm_set1_epi8(4); + __m128i v3 = _mm_adds_epi8(*fl, k3); + __m128i v4 = _mm_adds_epi8(*fl, k4); + + SignedShift8b(&v4); // v4 >> 3 + SignedShift8b(&v3); // v3 >> 3 + *q0 = _mm_subs_epi8(*q0, v4); // q0 -= v4 + *p0 = _mm_adds_epi8(*p0, v3); // p0 += v3 +} - *mask = MM_ABS(*p0, *q0); // abs(p0 - q0) - *mask = _mm_adds_epu8(*mask, *mask); // abs(p0 - q0) * 2 - *mask = _mm_adds_epu8(*mask, t1); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2 +// Updates values of 2 pixels at MB edge during complex filtering. +// Update operations: +// q = q - delta and p = p + delta; where delta = [(a_hi >> 7), (a_lo >> 7)] +// Pixels 'pi' and 'qi' are int8_t on input, uint8_t on output (sign flip). +static WEBP_INLINE void Update2Pixels(__m128i* const pi, __m128i* const qi, + const __m128i* const a0_lo, + const __m128i* const a0_hi) { + const __m128i a1_lo = _mm_srai_epi16(*a0_lo, 7); + const __m128i a1_hi = _mm_srai_epi16(*a0_hi, 7); + const __m128i delta = _mm_packs_epi16(a1_lo, a1_hi); + const __m128i sign_bit = _mm_set1_epi8(0x80); + *pi = _mm_adds_epi8(*pi, delta); + *qi = _mm_subs_epi8(*qi, delta); + FLIP_SIGN_BIT2(*pi, *qi); +} - t1 = _mm_set1_epi8(thresh); - *mask = _mm_subs_epu8(*mask, t1); // mask <= thresh - *mask = _mm_cmpeq_epi8(*mask, _mm_setzero_si128()); +// input pixels are uint8_t +static WEBP_INLINE void NeedsFilter(const __m128i* const p1, + const __m128i* const p0, + const __m128i* const q0, + const __m128i* const q1, + int thresh, __m128i* const mask) { + const __m128i m_thresh = _mm_set1_epi8(thresh); + const __m128i t1 = MM_ABS(*p1, *q1); // abs(p1 - q1) + const __m128i kFE = _mm_set1_epi8(0xFE); + const __m128i t2 = _mm_and_si128(t1, kFE); // set lsb of each byte to zero + const __m128i t3 = _mm_srli_epi16(t2, 1); // abs(p1 - q1) / 2 + + const __m128i t4 = MM_ABS(*p0, *q0); // abs(p0 - q0) + const __m128i t5 = _mm_adds_epu8(t4, t4); // abs(p0 - q0) * 2 + const __m128i t6 = _mm_adds_epu8(t5, t3); // abs(p0-q0)*2 + abs(p1-q1)/2 + + const __m128i t7 = _mm_subs_epu8(t6, m_thresh); // mask <= m_thresh + *mask = _mm_cmpeq_epi8(t7, _mm_setzero_si128()); } //------------------------------------------------------------------------------ // Edge filtering functions // Applies filter on 2 pixels (p0 and q0) -static WEBP_INLINE void DoFilter2(const __m128i* p1, __m128i* p0, __m128i* q0, - const __m128i* q1, int thresh) { +static WEBP_INLINE void DoFilter2(__m128i* const p1, __m128i* const p0, + __m128i* const q0, __m128i* const q1, + int thresh) { __m128i a, mask; const __m128i sign_bit = _mm_set1_epi8(0x80); + // convert p1/q1 to int8_t (for GetBaseDelta) const __m128i p1s = _mm_xor_si128(*p1, sign_bit); const __m128i q1s = _mm_xor_si128(*q1, sign_bit); NeedsFilter(p1, p0, q0, q1, thresh, &mask); - // convert to signed values FLIP_SIGN_BIT2(*p0, *q0); - - GET_BASE_DELTA(p1s, *p0, *q0, q1s, a); + GetBaseDelta(&p1s, p0, q0, &q1s, &a); a = _mm_and_si128(a, mask); // mask filter values we don't care about - DO_SIMPLE_FILTER(*p0, *q0, a); - - // unoffset + DoSimpleFilter(p0, q0, &a); FLIP_SIGN_BIT2(*p0, *q0); } // Applies filter on 4 pixels (p1, p0, q0 and q1) -static WEBP_INLINE void DoFilter4(__m128i* p1, __m128i *p0, - __m128i* q0, __m128i* q1, - const __m128i* mask, int hev_thresh) { +static WEBP_INLINE void DoFilter4(__m128i* const p1, __m128i* const p0, + __m128i* const q0, __m128i* const q1, + const __m128i* const mask, int hev_thresh) { + const __m128i zero = _mm_setzero_si128(); + const __m128i sign_bit = _mm_set1_epi8(0x80); + const __m128i k64 = _mm_set1_epi8(64); + const __m128i k3 = _mm_set1_epi8(3); + const __m128i k4 = _mm_set1_epi8(4); __m128i not_hev; __m128i t1, t2, t3; - const __m128i sign_bit = _mm_set1_epi8(0x80); // compute hev mask - GET_NOTHEV(*p1, *p0, *q0, *q1, hev_thresh, not_hev); + GetNotHEV(p1, p0, q0, q1, hev_thresh, ¬_hev); // convert to signed values FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); @@ -385,135 +448,115 @@ static WEBP_INLINE void DoFilter4(__m128i* p1, __m128i *p0, t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 3 * (q0 - p0) t1 = _mm_and_si128(t1, *mask); // mask filter values we don't care about - // Do +4 side - t2 = _mm_set1_epi8(4); - t2 = _mm_adds_epi8(t1, t2); // 3 * (q0 - p0) + (p1 - q1) + 4 - SIGNED_SHIFT_N(t2, 3); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 3 - t3 = t2; // save t2 - *q0 = _mm_subs_epi8(*q0, t2); // q0 -= t2 - - // Now do +3 side - t2 = _mm_set1_epi8(3); - t2 = _mm_adds_epi8(t1, t2); // +3 instead of +4 - SIGNED_SHIFT_N(t2, 3); // (3 * (q0 - p0) + hev(p1 - q1) + 3) >> 3 + t2 = _mm_adds_epi8(t1, k3); // 3 * (q0 - p0) + hev(p1 - q1) + 3 + t3 = _mm_adds_epi8(t1, k4); // 3 * (q0 - p0) + hev(p1 - q1) + 4 + SignedShift8b(&t2); // (3 * (q0 - p0) + hev(p1 - q1) + 3) >> 3 + SignedShift8b(&t3); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 3 *p0 = _mm_adds_epi8(*p0, t2); // p0 += t2 + *q0 = _mm_subs_epi8(*q0, t3); // q0 -= t3 + FLIP_SIGN_BIT2(*p0, *q0); - t2 = _mm_set1_epi8(1); - t3 = _mm_adds_epi8(t3, t2); - SIGNED_SHIFT_N(t3, 1); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 4 + // this is equivalent to signed (a + 1) >> 1 calculation + t2 = _mm_add_epi8(t3, sign_bit); + t3 = _mm_avg_epu8(t2, zero); + t3 = _mm_sub_epi8(t3, k64); t3 = _mm_and_si128(not_hev, t3); // if !hev *q1 = _mm_subs_epi8(*q1, t3); // q1 -= t3 *p1 = _mm_adds_epi8(*p1, t3); // p1 += t3 - - // unoffset - FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); + FLIP_SIGN_BIT2(*p1, *q1); } // Applies filter on 6 pixels (p2, p1, p0, q0, q1 and q2) -static WEBP_INLINE void DoFilter6(__m128i *p2, __m128i* p1, __m128i *p0, - __m128i* q0, __m128i* q1, __m128i *q2, - const __m128i* mask, int hev_thresh) { - __m128i a, not_hev; +static WEBP_INLINE void DoFilter6(__m128i* const p2, __m128i* const p1, + __m128i* const p0, __m128i* const q0, + __m128i* const q1, __m128i* const q2, + const __m128i* const mask, int hev_thresh) { + const __m128i zero = _mm_setzero_si128(); const __m128i sign_bit = _mm_set1_epi8(0x80); + __m128i a, not_hev; // compute hev mask - GET_NOTHEV(*p1, *p0, *q0, *q1, hev_thresh, not_hev); + GetNotHEV(p1, p0, q0, q1, hev_thresh, ¬_hev); - // convert to signed values FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); FLIP_SIGN_BIT2(*p2, *q2); - - GET_BASE_DELTA(*p1, *p0, *q0, *q1, a); + GetBaseDelta(p1, p0, q0, q1, &a); { // do simple filter on pixels with hev const __m128i m = _mm_andnot_si128(not_hev, *mask); const __m128i f = _mm_and_si128(a, m); - DO_SIMPLE_FILTER(*p0, *q0, f); + DoSimpleFilter(p0, q0, &f); } + { // do strong filter on pixels with not hev - const __m128i zero = _mm_setzero_si128(); - const __m128i nine = _mm_set1_epi16(0x0900); - const __m128i sixty_three = _mm_set1_epi16(63); + const __m128i k9 = _mm_set1_epi16(0x0900); + const __m128i k63 = _mm_set1_epi16(63); const __m128i m = _mm_and_si128(not_hev, *mask); const __m128i f = _mm_and_si128(a, m); + const __m128i f_lo = _mm_unpacklo_epi8(zero, f); const __m128i f_hi = _mm_unpackhi_epi8(zero, f); - const __m128i f9_lo = _mm_mulhi_epi16(f_lo, nine); // Filter (lo) * 9 - const __m128i f9_hi = _mm_mulhi_epi16(f_hi, nine); // Filter (hi) * 9 - const __m128i f18_lo = _mm_add_epi16(f9_lo, f9_lo); // Filter (lo) * 18 - const __m128i f18_hi = _mm_add_epi16(f9_hi, f9_hi); // Filter (hi) * 18 + const __m128i f9_lo = _mm_mulhi_epi16(f_lo, k9); // Filter (lo) * 9 + const __m128i f9_hi = _mm_mulhi_epi16(f_hi, k9); // Filter (hi) * 9 - const __m128i a2_lo = _mm_add_epi16(f9_lo, sixty_three); // Filter * 9 + 63 - const __m128i a2_hi = _mm_add_epi16(f9_hi, sixty_three); // Filter * 9 + 63 + const __m128i a2_lo = _mm_add_epi16(f9_lo, k63); // Filter * 9 + 63 + const __m128i a2_hi = _mm_add_epi16(f9_hi, k63); // Filter * 9 + 63 - const __m128i a1_lo = _mm_add_epi16(f18_lo, sixty_three); // F... * 18 + 63 - const __m128i a1_hi = _mm_add_epi16(f18_hi, sixty_three); // F... * 18 + 63 + const __m128i a1_lo = _mm_add_epi16(a2_lo, f9_lo); // Filter * 18 + 63 + const __m128i a1_hi = _mm_add_epi16(a2_hi, f9_hi); // Filter * 18 + 63 - const __m128i a0_lo = _mm_add_epi16(f18_lo, a2_lo); // Filter * 27 + 63 - const __m128i a0_hi = _mm_add_epi16(f18_hi, a2_hi); // Filter * 27 + 63 + const __m128i a0_lo = _mm_add_epi16(a1_lo, f9_lo); // Filter * 27 + 63 + const __m128i a0_hi = _mm_add_epi16(a1_hi, f9_hi); // Filter * 27 + 63 - UPDATE_2PIXELS(*p2, *q2, a2_lo, a2_hi); - UPDATE_2PIXELS(*p1, *q1, a1_lo, a1_hi); - UPDATE_2PIXELS(*p0, *q0, a0_lo, a0_hi); + Update2Pixels(p2, q2, &a2_lo, &a2_hi); + Update2Pixels(p1, q1, &a1_lo, &a1_hi); + Update2Pixels(p0, q0, &a0_lo, &a0_hi); } +} - // unoffset - FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); - FLIP_SIGN_BIT2(*p2, *q2); +// memcpy() is the safe way of moving potentially unaligned 32b memory. +static WEBP_INLINE uint32_t MemToUint32(const uint8_t* const ptr) { + uint32_t A; + memcpy(&A, (const int*)ptr, sizeof(A)); + return A; } // reads 8 rows across a vertical edge. -// -// TODO(somnath): Investigate _mm_shuffle* also see if it can be broken into -// two Load4x4() to avoid code duplication. -static WEBP_INLINE void Load8x4(const uint8_t* b, int stride, - __m128i* p, __m128i* q) { - __m128i t1, t2; - - // Load 0th, 1st, 4th and 5th rows - __m128i r0 = _mm_cvtsi32_si128(*((int*)&b[0 * stride])); // 03 02 01 00 - __m128i r1 = _mm_cvtsi32_si128(*((int*)&b[1 * stride])); // 13 12 11 10 - __m128i r4 = _mm_cvtsi32_si128(*((int*)&b[4 * stride])); // 43 42 41 40 - __m128i r5 = _mm_cvtsi32_si128(*((int*)&b[5 * stride])); // 53 52 51 50 - - r0 = _mm_unpacklo_epi32(r0, r4); // 43 42 41 40 03 02 01 00 - r1 = _mm_unpacklo_epi32(r1, r5); // 53 52 51 50 13 12 11 10 - - // t1 = 53 43 52 42 51 41 50 40 13 03 12 02 11 01 10 00 - t1 = _mm_unpacklo_epi8(r0, r1); - - // Load 2nd, 3rd, 6th and 7th rows - r0 = _mm_cvtsi32_si128(*((int*)&b[2 * stride])); // 23 22 21 22 - r1 = _mm_cvtsi32_si128(*((int*)&b[3 * stride])); // 33 32 31 30 - r4 = _mm_cvtsi32_si128(*((int*)&b[6 * stride])); // 63 62 61 60 - r5 = _mm_cvtsi32_si128(*((int*)&b[7 * stride])); // 73 72 71 70 - - r0 = _mm_unpacklo_epi32(r0, r4); // 63 62 61 60 23 22 21 20 - r1 = _mm_unpacklo_epi32(r1, r5); // 73 72 71 70 33 32 31 30 - - // t2 = 73 63 72 62 71 61 70 60 33 23 32 22 31 21 30 20 - t2 = _mm_unpacklo_epi8(r0, r1); - - // t1 = 33 23 13 03 32 22 12 02 31 21 11 01 30 20 10 00 - // t2 = 73 63 53 43 72 62 52 42 71 61 51 41 70 60 50 40 - r0 = t1; - t1 = _mm_unpacklo_epi16(t1, t2); - t2 = _mm_unpackhi_epi16(r0, t2); +static WEBP_INLINE void Load8x4(const uint8_t* const b, int stride, + __m128i* const p, __m128i* const q) { + // A0 = 63 62 61 60 23 22 21 20 43 42 41 40 03 02 01 00 + // A1 = 73 72 71 70 33 32 31 30 53 52 51 50 13 12 11 10 + const __m128i A0 = _mm_set_epi32( + MemToUint32(&b[6 * stride]), MemToUint32(&b[2 * stride]), + MemToUint32(&b[4 * stride]), MemToUint32(&b[0 * stride])); + const __m128i A1 = _mm_set_epi32( + MemToUint32(&b[7 * stride]), MemToUint32(&b[3 * stride]), + MemToUint32(&b[5 * stride]), MemToUint32(&b[1 * stride])); + + // B0 = 53 43 52 42 51 41 50 40 13 03 12 02 11 01 10 00 + // B1 = 73 63 72 62 71 61 70 60 33 23 32 22 31 21 30 20 + const __m128i B0 = _mm_unpacklo_epi8(A0, A1); + const __m128i B1 = _mm_unpackhi_epi8(A0, A1); + + // C0 = 33 23 13 03 32 22 12 02 31 21 11 01 30 20 10 00 + // C1 = 73 63 53 43 72 62 52 42 71 61 51 41 70 60 50 40 + const __m128i C0 = _mm_unpacklo_epi16(B0, B1); + const __m128i C1 = _mm_unpackhi_epi16(B0, B1); // *p = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00 // *q = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02 - *p = _mm_unpacklo_epi32(t1, t2); - *q = _mm_unpackhi_epi32(t1, t2); + *p = _mm_unpacklo_epi32(C0, C1); + *q = _mm_unpackhi_epi32(C0, C1); } -static WEBP_INLINE void Load16x4(const uint8_t* r0, const uint8_t* r8, +static WEBP_INLINE void Load16x4(const uint8_t* const r0, + const uint8_t* const r8, int stride, - __m128i* p1, __m128i* p0, - __m128i* q0, __m128i* q1) { - __m128i t1, t2; + __m128i* const p1, __m128i* const p0, + __m128i* const q0, __m128i* const q1) { // Assume the pixels around the edge (|) are numbered as follows // 00 01 | 02 03 // 10 11 | 12 13 @@ -532,19 +575,21 @@ static WEBP_INLINE void Load16x4(const uint8_t* r0, const uint8_t* r8, Load8x4(r0, stride, p1, q0); Load8x4(r8, stride, p0, q1); - t1 = *p1; - t2 = *q0; - // p1 = f0 e0 d0 c0 b0 a0 90 80 70 60 50 40 30 20 10 00 - // p0 = f1 e1 d1 c1 b1 a1 91 81 71 61 51 41 31 21 11 01 - // q0 = f2 e2 d2 c2 b2 a2 92 82 72 62 52 42 32 22 12 02 - // q1 = f3 e3 d3 c3 b3 a3 93 83 73 63 53 43 33 23 13 03 - *p1 = _mm_unpacklo_epi64(t1, *p0); - *p0 = _mm_unpackhi_epi64(t1, *p0); - *q0 = _mm_unpacklo_epi64(t2, *q1); - *q1 = _mm_unpackhi_epi64(t2, *q1); + { + // p1 = f0 e0 d0 c0 b0 a0 90 80 70 60 50 40 30 20 10 00 + // p0 = f1 e1 d1 c1 b1 a1 91 81 71 61 51 41 31 21 11 01 + // q0 = f2 e2 d2 c2 b2 a2 92 82 72 62 52 42 32 22 12 02 + // q1 = f3 e3 d3 c3 b3 a3 93 83 73 63 53 43 33 23 13 03 + const __m128i t1 = *p1; + const __m128i t2 = *q0; + *p1 = _mm_unpacklo_epi64(t1, *p0); + *p0 = _mm_unpackhi_epi64(t1, *p0); + *q0 = _mm_unpacklo_epi64(t2, *q1); + *q1 = _mm_unpackhi_epi64(t2, *q1); + } } -static WEBP_INLINE void Store4x4(__m128i* x, uint8_t* dst, int stride) { +static WEBP_INLINE void Store4x4(__m128i* const x, uint8_t* dst, int stride) { int i; for (i = 0; i < 4; ++i, dst += stride) { *((int32_t*)dst) = _mm_cvtsi128_si32(*x); @@ -553,48 +598,51 @@ static WEBP_INLINE void Store4x4(__m128i* x, uint8_t* dst, int stride) { } // Transpose back and store -static WEBP_INLINE void Store16x4(uint8_t* r0, uint8_t* r8, int stride, - __m128i* p1, __m128i* p0, - __m128i* q0, __m128i* q1) { - __m128i t1; +static WEBP_INLINE void Store16x4(const __m128i* const p1, + const __m128i* const p0, + const __m128i* const q0, + const __m128i* const q1, + uint8_t* r0, uint8_t* r8, + int stride) { + __m128i t1, p1_s, p0_s, q0_s, q1_s; // p0 = 71 70 61 60 51 50 41 40 31 30 21 20 11 10 01 00 // p1 = f1 f0 e1 e0 d1 d0 c1 c0 b1 b0 a1 a0 91 90 81 80 t1 = *p0; - *p0 = _mm_unpacklo_epi8(*p1, t1); - *p1 = _mm_unpackhi_epi8(*p1, t1); + p0_s = _mm_unpacklo_epi8(*p1, t1); + p1_s = _mm_unpackhi_epi8(*p1, t1); // q0 = 73 72 63 62 53 52 43 42 33 32 23 22 13 12 03 02 // q1 = f3 f2 e3 e2 d3 d2 c3 c2 b3 b2 a3 a2 93 92 83 82 t1 = *q0; - *q0 = _mm_unpacklo_epi8(t1, *q1); - *q1 = _mm_unpackhi_epi8(t1, *q1); + q0_s = _mm_unpacklo_epi8(t1, *q1); + q1_s = _mm_unpackhi_epi8(t1, *q1); // p0 = 33 32 31 30 23 22 21 20 13 12 11 10 03 02 01 00 // q0 = 73 72 71 70 63 62 61 60 53 52 51 50 43 42 41 40 - t1 = *p0; - *p0 = _mm_unpacklo_epi16(t1, *q0); - *q0 = _mm_unpackhi_epi16(t1, *q0); + t1 = p0_s; + p0_s = _mm_unpacklo_epi16(t1, q0_s); + q0_s = _mm_unpackhi_epi16(t1, q0_s); // p1 = b3 b2 b1 b0 a3 a2 a1 a0 93 92 91 90 83 82 81 80 // q1 = f3 f2 f1 f0 e3 e2 e1 e0 d3 d2 d1 d0 c3 c2 c1 c0 - t1 = *p1; - *p1 = _mm_unpacklo_epi16(t1, *q1); - *q1 = _mm_unpackhi_epi16(t1, *q1); + t1 = p1_s; + p1_s = _mm_unpacklo_epi16(t1, q1_s); + q1_s = _mm_unpackhi_epi16(t1, q1_s); - Store4x4(p0, r0, stride); + Store4x4(&p0_s, r0, stride); r0 += 4 * stride; - Store4x4(q0, r0, stride); + Store4x4(&q0_s, r0, stride); - Store4x4(p1, r8, stride); + Store4x4(&p1_s, r8, stride); r8 += 4 * stride; - Store4x4(q1, r8, stride); + Store4x4(&q1_s, r8, stride); } //------------------------------------------------------------------------------ // Simple In-loop filtering (Paragraph 15.2) -static void SimpleVFilter16SSE2(uint8_t* p, int stride, int thresh) { +static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { // Load __m128i p1 = _mm_loadu_si128((__m128i*)&p[-2 * stride]); __m128i p0 = _mm_loadu_si128((__m128i*)&p[-stride]); @@ -605,49 +653,49 @@ static void SimpleVFilter16SSE2(uint8_t* p, int stride, int thresh) { // Store _mm_storeu_si128((__m128i*)&p[-stride], p0); - _mm_storeu_si128((__m128i*)p, q0); + _mm_storeu_si128((__m128i*)&p[0], q0); } -static void SimpleHFilter16SSE2(uint8_t* p, int stride, int thresh) { +static void SimpleHFilter16(uint8_t* p, int stride, int thresh) { __m128i p1, p0, q0, q1; p -= 2; // beginning of p1 - Load16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1); + Load16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1); DoFilter2(&p1, &p0, &q0, &q1, thresh); - Store16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1); + Store16x4(&p1, &p0, &q0, &q1, p, p + 8 * stride, stride); } -static void SimpleVFilter16iSSE2(uint8_t* p, int stride, int thresh) { +static void SimpleVFilter16i(uint8_t* p, int stride, int thresh) { int k; for (k = 3; k > 0; --k) { p += 4 * stride; - SimpleVFilter16SSE2(p, stride, thresh); + SimpleVFilter16(p, stride, thresh); } } -static void SimpleHFilter16iSSE2(uint8_t* p, int stride, int thresh) { +static void SimpleHFilter16i(uint8_t* p, int stride, int thresh) { int k; for (k = 3; k > 0; --k) { p += 4; - SimpleHFilter16SSE2(p, stride, thresh); + SimpleHFilter16(p, stride, thresh); } } //------------------------------------------------------------------------------ // Complex In-loop filtering (Paragraph 15.3) -#define MAX_DIFF1(p3, p2, p1, p0, m) { \ - m = MM_ABS(p3, p2); \ +#define MAX_DIFF1(p3, p2, p1, p0, m) do { \ + m = MM_ABS(p1, p0); \ + m = _mm_max_epu8(m, MM_ABS(p3, p2)); \ m = _mm_max_epu8(m, MM_ABS(p2, p1)); \ - m = _mm_max_epu8(m, MM_ABS(p1, p0)); \ -} +} while (0) -#define MAX_DIFF2(p3, p2, p1, p0, m) { \ +#define MAX_DIFF2(p3, p2, p1, p0, m) do { \ + m = _mm_max_epu8(m, MM_ABS(p1, p0)); \ m = _mm_max_epu8(m, MM_ABS(p3, p2)); \ m = _mm_max_epu8(m, MM_ABS(p2, p1)); \ - m = _mm_max_epu8(m, MM_ABS(p1, p0)); \ -} +} while (0) #define LOAD_H_EDGES4(p, stride, e1, e2, e3, e4) { \ e1 = _mm_loadu_si128((__m128i*)&(p)[0 * stride]); \ @@ -656,10 +704,11 @@ static void SimpleHFilter16iSSE2(uint8_t* p, int stride, int thresh) { e4 = _mm_loadu_si128((__m128i*)&(p)[3 * stride]); \ } -#define LOADUV_H_EDGE(p, u, v, stride) { \ - p = _mm_loadl_epi64((__m128i*)&(u)[(stride)]); \ - p = _mm_unpacklo_epi64(p, _mm_loadl_epi64((__m128i*)&(v)[(stride)])); \ -} +#define LOADUV_H_EDGE(p, u, v, stride) do { \ + const __m128i U = _mm_loadl_epi64((__m128i*)&(u)[(stride)]); \ + const __m128i V = _mm_loadl_epi64((__m128i*)&(v)[(stride)]); \ + p = _mm_unpacklo_epi64(U, V); \ +} while (0) #define LOADUV_H_EDGES4(u, v, stride, e1, e2, e3, e4) { \ LOADUV_H_EDGE(e1, u, v, 0 * stride); \ @@ -674,18 +723,23 @@ static void SimpleHFilter16iSSE2(uint8_t* p, int stride, int thresh) { _mm_storel_epi64((__m128i*)&v[(stride)], p); \ } -#define COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask) { \ - __m128i fl_yes; \ - const __m128i it = _mm_set1_epi8(ithresh); \ - mask = _mm_subs_epu8(mask, it); \ - mask = _mm_cmpeq_epi8(mask, _mm_setzero_si128()); \ - NeedsFilter(&p1, &p0, &q0, &q1, thresh, &fl_yes); \ - mask = _mm_and_si128(mask, fl_yes); \ +static WEBP_INLINE void ComplexMask(const __m128i* const p1, + const __m128i* const p0, + const __m128i* const q0, + const __m128i* const q1, + int thresh, int ithresh, + __m128i* const mask) { + const __m128i it = _mm_set1_epi8(ithresh); + const __m128i diff = _mm_subs_epu8(*mask, it); + const __m128i thresh_mask = _mm_cmpeq_epi8(diff, _mm_setzero_si128()); + __m128i filter_mask; + NeedsFilter(p1, p0, q0, q1, thresh, &filter_mask); + *mask = _mm_and_si128(thresh_mask, filter_mask); } // on macroblock edges -static void VFilter16SSE2(uint8_t* p, int stride, - int thresh, int ithresh, int hev_thresh) { +static void VFilter16(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { __m128i t1; __m128i mask; __m128i p2, p1, p0, q0, q1, q2; @@ -698,20 +752,20 @@ static void VFilter16SSE2(uint8_t* p, int stride, LOAD_H_EDGES4(p, stride, q0, q1, q2, t1); MAX_DIFF2(t1, q2, q1, q0, mask); - COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); // Store _mm_storeu_si128((__m128i*)&p[-3 * stride], p2); _mm_storeu_si128((__m128i*)&p[-2 * stride], p1); _mm_storeu_si128((__m128i*)&p[-1 * stride], p0); - _mm_storeu_si128((__m128i*)&p[0 * stride], q0); - _mm_storeu_si128((__m128i*)&p[1 * stride], q1); - _mm_storeu_si128((__m128i*)&p[2 * stride], q2); + _mm_storeu_si128((__m128i*)&p[+0 * stride], q0); + _mm_storeu_si128((__m128i*)&p[+1 * stride], q1); + _mm_storeu_si128((__m128i*)&p[+2 * stride], q2); } -static void HFilter16SSE2(uint8_t* p, int stride, - int thresh, int ithresh, int hev_thresh) { +static void HFilter16(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { __m128i mask; __m128i p3, p2, p1, p0, q0, q1, q2, q3; @@ -722,71 +776,78 @@ static void HFilter16SSE2(uint8_t* p, int stride, Load16x4(p, p + 8 * stride, stride, &q0, &q1, &q2, &q3); // q0, q1, q2, q3 MAX_DIFF2(q3, q2, q1, q0, mask); - COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); - Store16x4(b, b + 8 * stride, stride, &p3, &p2, &p1, &p0); - Store16x4(p, p + 8 * stride, stride, &q0, &q1, &q2, &q3); + Store16x4(&p3, &p2, &p1, &p0, b, b + 8 * stride, stride); + Store16x4(&q0, &q1, &q2, &q3, p, p + 8 * stride, stride); } // on three inner edges -static void VFilter16iSSE2(uint8_t* p, int stride, - int thresh, int ithresh, int hev_thresh) { +static void VFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { int k; - __m128i mask; - __m128i t1, t2, p1, p0, q0, q1; + __m128i p3, p2, p1, p0; // loop invariants - for (k = 3; k > 0; --k) { - // Load p3, p2, p1, p0 - LOAD_H_EDGES4(p, stride, t2, t1, p1, p0); - MAX_DIFF1(t2, t1, p1, p0, mask); + LOAD_H_EDGES4(p, stride, p3, p2, p1, p0); // prologue + for (k = 3; k > 0; --k) { + __m128i mask, tmp1, tmp2; + uint8_t* const b = p + 2 * stride; // beginning of p1 p += 4 * stride; - // Load q0, q1, q2, q3 - LOAD_H_EDGES4(p, stride, q0, q1, t1, t2); - MAX_DIFF2(t2, t1, q1, q0, mask); + MAX_DIFF1(p3, p2, p1, p0, mask); // compute partial mask + LOAD_H_EDGES4(p, stride, p3, p2, tmp1, tmp2); + MAX_DIFF2(p3, p2, tmp1, tmp2, mask); - COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); - DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); + // p3 and p2 are not just temporary variables here: they will be + // re-used for next span. And q2/q3 will become p1/p0 accordingly. + ComplexMask(&p1, &p0, &p3, &p2, thresh, ithresh, &mask); + DoFilter4(&p1, &p0, &p3, &p2, &mask, hev_thresh); // Store - _mm_storeu_si128((__m128i*)&p[-2 * stride], p1); - _mm_storeu_si128((__m128i*)&p[-1 * stride], p0); - _mm_storeu_si128((__m128i*)&p[0 * stride], q0); - _mm_storeu_si128((__m128i*)&p[1 * stride], q1); + _mm_storeu_si128((__m128i*)&b[0 * stride], p1); + _mm_storeu_si128((__m128i*)&b[1 * stride], p0); + _mm_storeu_si128((__m128i*)&b[2 * stride], p3); + _mm_storeu_si128((__m128i*)&b[3 * stride], p2); + + // rotate samples + p1 = tmp1; + p0 = tmp2; } } -static void HFilter16iSSE2(uint8_t* p, int stride, - int thresh, int ithresh, int hev_thresh) { +static void HFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { int k; - uint8_t* b; - __m128i mask; - __m128i t1, t2, p1, p0, q0, q1; + __m128i p3, p2, p1, p0; // loop invariants + + Load16x4(p, p + 8 * stride, stride, &p3, &p2, &p1, &p0); // prologue for (k = 3; k > 0; --k) { - b = p; - Load16x4(b, b + 8 * stride, stride, &t2, &t1, &p1, &p0); // p3, p2, p1, p0 - MAX_DIFF1(t2, t1, p1, p0, mask); + __m128i mask, tmp1, tmp2; + uint8_t* const b = p + 2; // beginning of p1 - b += 4; // beginning of q0 - Load16x4(b, b + 8 * stride, stride, &q0, &q1, &t1, &t2); // q0, q1, q2, q3 - MAX_DIFF2(t2, t1, q1, q0, mask); + p += 4; // beginning of q0 (and next span) - COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); - DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); + MAX_DIFF1(p3, p2, p1, p0, mask); // compute partial mask + Load16x4(p, p + 8 * stride, stride, &p3, &p2, &tmp1, &tmp2); + MAX_DIFF2(p3, p2, tmp1, tmp2, mask); - b -= 2; // beginning of p1 - Store16x4(b, b + 8 * stride, stride, &p1, &p0, &q0, &q1); + ComplexMask(&p1, &p0, &p3, &p2, thresh, ithresh, &mask); + DoFilter4(&p1, &p0, &p3, &p2, &mask, hev_thresh); - p += 4; + Store16x4(&p1, &p0, &p3, &p2, b, b + 8 * stride, stride); + + // rotate samples + p1 = tmp1; + p0 = tmp2; } } // 8-pixels wide variant, for chroma filtering -static void VFilter8SSE2(uint8_t* u, uint8_t* v, int stride, - int thresh, int ithresh, int hev_thresh) { +static void VFilter8(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { __m128i mask; __m128i t1, p2, p1, p0, q0, q1, q2; @@ -798,7 +859,7 @@ static void VFilter8SSE2(uint8_t* u, uint8_t* v, int stride, LOADUV_H_EDGES4(u, v, stride, q0, q1, q2, t1); MAX_DIFF2(t1, q2, q1, q0, mask); - COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); // Store @@ -810,8 +871,8 @@ static void VFilter8SSE2(uint8_t* u, uint8_t* v, int stride, STOREUV(q2, u, v, 2 * stride); } -static void HFilter8SSE2(uint8_t* u, uint8_t* v, int stride, - int thresh, int ithresh, int hev_thresh) { +static void HFilter8(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { __m128i mask; __m128i p3, p2, p1, p0, q0, q1, q2, q3; @@ -823,15 +884,15 @@ static void HFilter8SSE2(uint8_t* u, uint8_t* v, int stride, Load16x4(u, v, stride, &q0, &q1, &q2, &q3); // q0, q1, q2, q3 MAX_DIFF2(q3, q2, q1, q0, mask); - COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); - Store16x4(tu, tv, stride, &p3, &p2, &p1, &p0); - Store16x4(u, v, stride, &q0, &q1, &q2, &q3); + Store16x4(&p3, &p2, &p1, &p0, tu, tv, stride); + Store16x4(&q0, &q1, &q2, &q3, u, v, stride); } -static void VFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, - int thresh, int ithresh, int hev_thresh) { +static void VFilter8i(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { __m128i mask; __m128i t1, t2, p1, p0, q0, q1; @@ -846,7 +907,7 @@ static void VFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, LOADUV_H_EDGES4(u, v, stride, q0, q1, t1, t2); MAX_DIFF2(t2, t1, q1, q0, mask); - COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); // Store @@ -856,8 +917,8 @@ static void VFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, STOREUV(q1, u, v, 1 * stride); } -static void HFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, - int thresh, int ithresh, int hev_thresh) { +static void HFilter8i(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { __m128i mask; __m128i t1, t2, p1, p0, q0, q1; Load16x4(u, v, stride, &t2, &t1, &p1, &p0); // p3, p2, p1, p0 @@ -868,36 +929,361 @@ static void HFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, Load16x4(u, v, stride, &q0, &q1, &t1, &t2); // q0, q1, q2, q3 MAX_DIFF2(t2, t1, q1, q0, mask); - COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); u -= 2; // beginning of p1 v -= 2; - Store16x4(u, v, stride, &p1, &p0, &q0, &q1); + Store16x4(&p1, &p0, &q0, &q1, u, v, stride); } -extern void VP8DspInitSSE2(void); +//------------------------------------------------------------------------------ +// 4x4 predictions + +#define DST(x, y) dst[(x) + (y) * BPS] +#define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2) + +// We use the following 8b-arithmetic tricks: +// (a + 2 * b + c + 2) >> 2 = (AC + b + 1) >> 1 +// where: AC = (a + c) >> 1 = [(a + c + 1) >> 1] - [(a^c) & 1] +// and: +// (a + 2 * b + c + 2) >> 2 = (AB + BC + 1) >> 1 - (ab|bc)&lsb +// where: AC = (a + b + 1) >> 1, BC = (b + c + 1) >> 1 +// and ab = a ^ b, bc = b ^ c, lsb = (AC^BC)&1 + +static void VE4(uint8_t* dst) { // vertical + const __m128i one = _mm_set1_epi8(1); + const __m128i ABCDEFGH = _mm_loadl_epi64((__m128i*)(dst - BPS - 1)); + const __m128i BCDEFGH0 = _mm_srli_si128(ABCDEFGH, 1); + const __m128i CDEFGH00 = _mm_srli_si128(ABCDEFGH, 2); + const __m128i a = _mm_avg_epu8(ABCDEFGH, CDEFGH00); + const __m128i lsb = _mm_and_si128(_mm_xor_si128(ABCDEFGH, CDEFGH00), one); + const __m128i b = _mm_subs_epu8(a, lsb); + const __m128i avg = _mm_avg_epu8(b, BCDEFGH0); + const uint32_t vals = _mm_cvtsi128_si32(avg); + int i; + for (i = 0; i < 4; ++i) { + *(uint32_t*)(dst + i * BPS) = vals; + } +} + +static void LD4(uint8_t* dst) { // Down-Left + const __m128i one = _mm_set1_epi8(1); + const __m128i ABCDEFGH = _mm_loadl_epi64((__m128i*)(dst - BPS)); + const __m128i BCDEFGH0 = _mm_srli_si128(ABCDEFGH, 1); + const __m128i CDEFGH00 = _mm_srli_si128(ABCDEFGH, 2); + const __m128i CDEFGHH0 = _mm_insert_epi16(CDEFGH00, dst[-BPS + 7], 3); + const __m128i avg1 = _mm_avg_epu8(ABCDEFGH, CDEFGHH0); + const __m128i lsb = _mm_and_si128(_mm_xor_si128(ABCDEFGH, CDEFGHH0), one); + const __m128i avg2 = _mm_subs_epu8(avg1, lsb); + const __m128i abcdefg = _mm_avg_epu8(avg2, BCDEFGH0); + *(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( abcdefg ); + *(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1)); + *(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2)); + *(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 3)); +} + +static void VR4(uint8_t* dst) { // Vertical-Right + const __m128i one = _mm_set1_epi8(1); + const int I = dst[-1 + 0 * BPS]; + const int J = dst[-1 + 1 * BPS]; + const int K = dst[-1 + 2 * BPS]; + const int X = dst[-1 - BPS]; + const __m128i XABCD = _mm_loadl_epi64((__m128i*)(dst - BPS - 1)); + const __m128i ABCD0 = _mm_srli_si128(XABCD, 1); + const __m128i abcd = _mm_avg_epu8(XABCD, ABCD0); + const __m128i _XABCD = _mm_slli_si128(XABCD, 1); + const __m128i IXABCD = _mm_insert_epi16(_XABCD, I | (X << 8), 0); + const __m128i avg1 = _mm_avg_epu8(IXABCD, ABCD0); + const __m128i lsb = _mm_and_si128(_mm_xor_si128(IXABCD, ABCD0), one); + const __m128i avg2 = _mm_subs_epu8(avg1, lsb); + const __m128i efgh = _mm_avg_epu8(avg2, XABCD); + *(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( abcd ); + *(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32( efgh ); + *(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_slli_si128(abcd, 1)); + *(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_slli_si128(efgh, 1)); + + // these two are hard to implement in SSE2, so we keep the C-version: + DST(0, 2) = AVG3(J, I, X); + DST(0, 3) = AVG3(K, J, I); +} -void VP8DspInitSSE2(void) { - VP8Transform = TransformSSE2; +static void VL4(uint8_t* dst) { // Vertical-Left + const __m128i one = _mm_set1_epi8(1); + const __m128i ABCDEFGH = _mm_loadl_epi64((__m128i*)(dst - BPS)); + const __m128i BCDEFGH_ = _mm_srli_si128(ABCDEFGH, 1); + const __m128i CDEFGH__ = _mm_srli_si128(ABCDEFGH, 2); + const __m128i avg1 = _mm_avg_epu8(ABCDEFGH, BCDEFGH_); + const __m128i avg2 = _mm_avg_epu8(CDEFGH__, BCDEFGH_); + const __m128i avg3 = _mm_avg_epu8(avg1, avg2); + const __m128i lsb1 = _mm_and_si128(_mm_xor_si128(avg1, avg2), one); + const __m128i ab = _mm_xor_si128(ABCDEFGH, BCDEFGH_); + const __m128i bc = _mm_xor_si128(CDEFGH__, BCDEFGH_); + const __m128i abbc = _mm_or_si128(ab, bc); + const __m128i lsb2 = _mm_and_si128(abbc, lsb1); + const __m128i avg4 = _mm_subs_epu8(avg3, lsb2); + const uint32_t extra_out = _mm_cvtsi128_si32(_mm_srli_si128(avg4, 4)); + *(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( avg1 ); + *(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32( avg4 ); + *(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(avg1, 1)); + *(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(avg4, 1)); + + // these two are hard to get and irregular + DST(3, 2) = (extra_out >> 0) & 0xff; + DST(3, 3) = (extra_out >> 8) & 0xff; +} + +static void RD4(uint8_t* dst) { // Down-right + const __m128i one = _mm_set1_epi8(1); + const __m128i XABCD = _mm_loadl_epi64((__m128i*)(dst - BPS - 1)); + const __m128i ____XABCD = _mm_slli_si128(XABCD, 4); + const uint32_t I = dst[-1 + 0 * BPS]; + const uint32_t J = dst[-1 + 1 * BPS]; + const uint32_t K = dst[-1 + 2 * BPS]; + const uint32_t L = dst[-1 + 3 * BPS]; + const __m128i LKJI_____ = + _mm_cvtsi32_si128(L | (K << 8) | (J << 16) | (I << 24)); + const __m128i LKJIXABCD = _mm_or_si128(LKJI_____, ____XABCD); + const __m128i KJIXABCD_ = _mm_srli_si128(LKJIXABCD, 1); + const __m128i JIXABCD__ = _mm_srli_si128(LKJIXABCD, 2); + const __m128i avg1 = _mm_avg_epu8(JIXABCD__, LKJIXABCD); + const __m128i lsb = _mm_and_si128(_mm_xor_si128(JIXABCD__, LKJIXABCD), one); + const __m128i avg2 = _mm_subs_epu8(avg1, lsb); + const __m128i abcdefg = _mm_avg_epu8(avg2, KJIXABCD_); + *(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32( abcdefg ); + *(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1)); + *(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2)); + *(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 3)); +} + +#undef DST +#undef AVG3 + +//------------------------------------------------------------------------------ +// Luma 16x16 + +static WEBP_INLINE void TrueMotion(uint8_t* dst, int size) { + const uint8_t* top = dst - BPS; + const __m128i zero = _mm_setzero_si128(); + int y; + if (size == 4) { + const __m128i top_values = _mm_cvtsi32_si128(MemToUint32(top)); + const __m128i top_base = _mm_unpacklo_epi8(top_values, zero); + for (y = 0; y < 4; ++y, dst += BPS) { + const int val = dst[-1] - top[-1]; + const __m128i base = _mm_set1_epi16(val); + const __m128i out = _mm_packus_epi16(_mm_add_epi16(base, top_base), zero); + *(int*)dst = _mm_cvtsi128_si32(out); + } + } else if (size == 8) { + const __m128i top_values = _mm_loadl_epi64((const __m128i*)top); + const __m128i top_base = _mm_unpacklo_epi8(top_values, zero); + for (y = 0; y < 8; ++y, dst += BPS) { + const int val = dst[-1] - top[-1]; + const __m128i base = _mm_set1_epi16(val); + const __m128i out = _mm_packus_epi16(_mm_add_epi16(base, top_base), zero); + _mm_storel_epi64((__m128i*)dst, out); + } + } else { + const __m128i top_values = _mm_loadu_si128((const __m128i*)top); + const __m128i top_base_0 = _mm_unpacklo_epi8(top_values, zero); + const __m128i top_base_1 = _mm_unpackhi_epi8(top_values, zero); + for (y = 0; y < 16; ++y, dst += BPS) { + const int val = dst[-1] - top[-1]; + const __m128i base = _mm_set1_epi16(val); + const __m128i out_0 = _mm_add_epi16(base, top_base_0); + const __m128i out_1 = _mm_add_epi16(base, top_base_1); + const __m128i out = _mm_packus_epi16(out_0, out_1); + _mm_storeu_si128((__m128i*)dst, out); + } + } +} + +static void TM4(uint8_t* dst) { TrueMotion(dst, 4); } +static void TM8uv(uint8_t* dst) { TrueMotion(dst, 8); } +static void TM16(uint8_t* dst) { TrueMotion(dst, 16); } + +static void VE16(uint8_t* dst) { + const __m128i top = _mm_loadu_si128((const __m128i*)(dst - BPS)); + int j; + for (j = 0; j < 16; ++j) { + _mm_storeu_si128((__m128i*)(dst + j * BPS), top); + } +} + +static void HE16(uint8_t* dst) { // horizontal + int j; + for (j = 16; j > 0; --j) { + const __m128i values = _mm_set1_epi8(dst[-1]); + _mm_storeu_si128((__m128i*)dst, values); + dst += BPS; + } +} + +static WEBP_INLINE void Put16(uint8_t v, uint8_t* dst) { + int j; + const __m128i values = _mm_set1_epi8(v); + for (j = 0; j < 16; ++j) { + _mm_storeu_si128((__m128i*)(dst + j * BPS), values); + } +} + +static void DC16(uint8_t* dst) { // DC + const __m128i zero = _mm_setzero_si128(); + const __m128i top = _mm_loadu_si128((const __m128i*)(dst - BPS)); + const __m128i sad8x2 = _mm_sad_epu8(top, zero); + // sum the two sads: sad8x2[0:1] + sad8x2[8:9] + const __m128i sum = _mm_add_epi16(sad8x2, _mm_shuffle_epi32(sad8x2, 2)); + int left = 0; + int j; + for (j = 0; j < 16; ++j) { + left += dst[-1 + j * BPS]; + } + { + const int DC = _mm_cvtsi128_si32(sum) + left + 16; + Put16(DC >> 5, dst); + } +} + +static void DC16NoTop(uint8_t* dst) { // DC with top samples not available + int DC = 8; + int j; + for (j = 0; j < 16; ++j) { + DC += dst[-1 + j * BPS]; + } + Put16(DC >> 4, dst); +} + +static void DC16NoLeft(uint8_t* dst) { // DC with left samples not available + const __m128i zero = _mm_setzero_si128(); + const __m128i top = _mm_loadu_si128((const __m128i*)(dst - BPS)); + const __m128i sad8x2 = _mm_sad_epu8(top, zero); + // sum the two sads: sad8x2[0:1] + sad8x2[8:9] + const __m128i sum = _mm_add_epi16(sad8x2, _mm_shuffle_epi32(sad8x2, 2)); + const int DC = _mm_cvtsi128_si32(sum) + 8; + Put16(DC >> 4, dst); +} - VP8VFilter16 = VFilter16SSE2; - VP8HFilter16 = HFilter16SSE2; - VP8VFilter8 = VFilter8SSE2; - VP8HFilter8 = HFilter8SSE2; - VP8VFilter16i = VFilter16iSSE2; - VP8HFilter16i = HFilter16iSSE2; - VP8VFilter8i = VFilter8iSSE2; - VP8HFilter8i = HFilter8iSSE2; +static void DC16NoTopLeft(uint8_t* dst) { // DC with no top and left samples + Put16(0x80, dst); +} + +//------------------------------------------------------------------------------ +// Chroma + +static void VE8uv(uint8_t* dst) { // vertical + int j; + const __m128i top = _mm_loadl_epi64((const __m128i*)(dst - BPS)); + for (j = 0; j < 8; ++j) { + _mm_storel_epi64((__m128i*)(dst + j * BPS), top); + } +} + +static void HE8uv(uint8_t* dst) { // horizontal + int j; + for (j = 0; j < 8; ++j) { + const __m128i values = _mm_set1_epi8(dst[-1]); + _mm_storel_epi64((__m128i*)dst, values); + dst += BPS; + } +} + +// helper for chroma-DC predictions +static WEBP_INLINE void Put8x8uv(uint8_t v, uint8_t* dst) { + int j; + const __m128i values = _mm_set1_epi8(v); + for (j = 0; j < 8; ++j) { + _mm_storel_epi64((__m128i*)(dst + j * BPS), values); + } +} - VP8SimpleVFilter16 = SimpleVFilter16SSE2; - VP8SimpleHFilter16 = SimpleHFilter16SSE2; - VP8SimpleVFilter16i = SimpleVFilter16iSSE2; - VP8SimpleHFilter16i = SimpleHFilter16iSSE2; +static void DC8uv(uint8_t* dst) { // DC + const __m128i zero = _mm_setzero_si128(); + const __m128i top = _mm_loadl_epi64((const __m128i*)(dst - BPS)); + const __m128i sum = _mm_sad_epu8(top, zero); + int left = 0; + int j; + for (j = 0; j < 8; ++j) { + left += dst[-1 + j * BPS]; + } + { + const int DC = _mm_cvtsi128_si32(sum) + left + 8; + Put8x8uv(DC >> 4, dst); + } } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" +static void DC8uvNoLeft(uint8_t* dst) { // DC with no left samples + const __m128i zero = _mm_setzero_si128(); + const __m128i top = _mm_loadl_epi64((const __m128i*)(dst - BPS)); + const __m128i sum = _mm_sad_epu8(top, zero); + const int DC = _mm_cvtsi128_si32(sum) + 4; + Put8x8uv(DC >> 3, dst); +} + +static void DC8uvNoTop(uint8_t* dst) { // DC with no top samples + int dc0 = 4; + int i; + for (i = 0; i < 8; ++i) { + dc0 += dst[-1 + i * BPS]; + } + Put8x8uv(dc0 >> 3, dst); +} + +static void DC8uvNoTopLeft(uint8_t* dst) { // DC with nothing + Put8x8uv(0x80, dst); +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8DspInitSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitSSE2(void) { + VP8Transform = Transform; +#if defined(USE_TRANSFORM_AC3) + VP8TransformAC3 = TransformAC3; #endif -#endif // WEBP_USE_SSE2 + VP8VFilter16 = VFilter16; + VP8HFilter16 = HFilter16; + VP8VFilter8 = VFilter8; + VP8HFilter8 = HFilter8; + VP8VFilter16i = VFilter16i; + VP8HFilter16i = HFilter16i; + VP8VFilter8i = VFilter8i; + VP8HFilter8i = HFilter8i; + + VP8SimpleVFilter16 = SimpleVFilter16; + VP8SimpleHFilter16 = SimpleHFilter16; + VP8SimpleVFilter16i = SimpleVFilter16i; + VP8SimpleHFilter16i = SimpleHFilter16i; + + VP8PredLuma4[1] = TM4; + VP8PredLuma4[2] = VE4; + VP8PredLuma4[4] = RD4; + VP8PredLuma4[5] = VR4; + VP8PredLuma4[6] = LD4; + VP8PredLuma4[7] = VL4; + + VP8PredLuma16[0] = DC16; + VP8PredLuma16[1] = TM16; + VP8PredLuma16[2] = VE16; + VP8PredLuma16[3] = HE16; + VP8PredLuma16[4] = DC16NoTop; + VP8PredLuma16[5] = DC16NoLeft; + VP8PredLuma16[6] = DC16NoTopLeft; + + VP8PredChroma8[0] = DC8uv; + VP8PredChroma8[1] = TM8uv; + VP8PredChroma8[2] = VE8uv; + VP8PredChroma8[3] = HE8uv; + VP8PredChroma8[4] = DC8uvNoTop; + VP8PredChroma8[5] = DC8uvNoLeft; + VP8PredChroma8[6] = DC8uvNoTopLeft; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(VP8DspInitSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/drivers/webp/dsp/dsp.h b/drivers/webp/dsp/dsp.h index fd686a8532..8395df40e4 100644 --- a/drivers/webp/dsp/dsp.h +++ b/drivers/webp/dsp/dsp.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Speed-critical functions. @@ -12,44 +14,121 @@ #ifndef WEBP_DSP_DSP_H_ #define WEBP_DSP_DSP_H_ -#include "../types.h" +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include "../webp/types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif +#define BPS 32 // this is the common stride for enc/dec + //------------------------------------------------------------------------------ // CPU detection -#if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86)) +#if defined(__GNUC__) +# define LOCAL_GCC_VERSION ((__GNUC__ << 8) | __GNUC_MINOR__) +# define LOCAL_GCC_PREREQ(maj, min) \ + (LOCAL_GCC_VERSION >= (((maj) << 8) | (min))) +#else +# define LOCAL_GCC_VERSION 0 +# define LOCAL_GCC_PREREQ(maj, min) 0 +#endif + +#ifndef __has_builtin +# define __has_builtin(x) 0 +#endif + +#if defined(_MSC_VER) && _MSC_VER > 1310 && \ + (defined(_M_X64) || defined(_M_IX86)) #define WEBP_MSC_SSE2 // Visual C++ SSE2 targets #endif -#if defined(__SSE2__) || defined(WEBP_MSC_SSE2) +#if defined(_MSC_VER) && _MSC_VER >= 1500 && \ + (defined(_M_X64) || defined(_M_IX86)) +#define WEBP_MSC_SSE41 // Visual C++ SSE4.1 targets +#endif + +// WEBP_HAVE_* are used to indicate the presence of the instruction set in dsp +// files without intrinsics, allowing the corresponding Init() to be called. +// Files containing intrinsics will need to be built targeting the instruction +// set so should succeed on one of the earlier tests. +#if defined(__SSE2__) || defined(WEBP_MSC_SSE2) || defined(WEBP_HAVE_SSE2) #define WEBP_USE_SSE2 #endif -#if defined(__ANDROID__) && defined(__ARM_ARCH_7A__) && defined(__ARM_NEON__) +#if defined(__SSE4_1__) || defined(WEBP_MSC_SSE41) || defined(WEBP_HAVE_SSE41) +#define WEBP_USE_SSE41 +#endif + +#if defined(__AVX2__) || defined(WEBP_HAVE_AVX2) +#define WEBP_USE_AVX2 +#endif + +#if defined(__ANDROID__) && defined(__ARM_ARCH_7A__) #define WEBP_ANDROID_NEON // Android targets that might support NEON #endif -#if ( (defined(__ARM_NEON__) && !defined(__aarch64__)) || defined(WEBP_ANDROID_NEON)) && !defined(PSP2_ENABLED) +// The intrinsics currently cause compiler errors with arm-nacl-gcc and the +// inline assembly would need to be modified for use with Native Client. +#if (defined(__ARM_NEON__) || defined(WEBP_ANDROID_NEON) || \ + defined(__aarch64__)) && !defined(__native_client__) +#define WEBP_USE_NEON +#endif + +#if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_M_ARM) #define WEBP_USE_NEON +#define WEBP_USE_INTRINSICS +#endif + +#if defined(__mips__) && !defined(__mips64) && \ + defined(__mips_isa_rev) && (__mips_isa_rev >= 1) && (__mips_isa_rev < 6) +#define WEBP_USE_MIPS32 +#if (__mips_isa_rev >= 2) +#define WEBP_USE_MIPS32_R2 +#if defined(__mips_dspr2) || (__mips_dsp_rev >= 2) +#define WEBP_USE_MIPS_DSP_R2 +#endif +#endif +#endif + +// This macro prevents thread_sanitizer from reporting known concurrent writes. +#define WEBP_TSAN_IGNORE_FUNCTION +#if defined(__has_feature) +#if __has_feature(thread_sanitizer) +#undef WEBP_TSAN_IGNORE_FUNCTION +#define WEBP_TSAN_IGNORE_FUNCTION __attribute__((no_sanitize_thread)) +#endif #endif typedef enum { kSSE2, kSSE3, - kNEON + kSSE4_1, + kAVX, + kAVX2, + kNEON, + kMIPS32, + kMIPSdspR2 } CPUFeature; // returns true if the CPU supports the feature. typedef int (*VP8CPUInfo)(CPUFeature feature); -extern VP8CPUInfo VP8GetCPUInfo; +WEBP_EXTERN(VP8CPUInfo) VP8GetCPUInfo; //------------------------------------------------------------------------------ -// Encoding +// Init stub generator -int VP8GetAlpha(const int histo[]); +// Defines an init function stub to ensure each module exposes a symbol, +// avoiding a compiler warning. +#define WEBP_DSP_INIT_STUB(func) \ + extern void func(void); \ + WEBP_TSAN_IGNORE_FUNCTION void func(void) {} + +//------------------------------------------------------------------------------ +// Encoding // Transforms // VP8Idct: Does one of two inverse transforms. If do_two is set, the transforms @@ -60,7 +139,7 @@ typedef void (*VP8Fdct)(const uint8_t* src, const uint8_t* ref, int16_t* out); typedef void (*VP8WHT)(const int16_t* in, int16_t* out); extern VP8Idct VP8ITransform; extern VP8Fdct VP8FTransform; -extern VP8WHT VP8ITransformWHT; +extern VP8Fdct VP8FTransform2; // performs two transforms at a time extern VP8WHT VP8FTransformWHT; // Predictions // *dst is the destination block. *top and *left can be NULL. @@ -79,20 +158,63 @@ extern VP8WMetric VP8TDisto4x4, VP8TDisto16x16; typedef void (*VP8BlockCopy)(const uint8_t* src, uint8_t* dst); extern VP8BlockCopy VP8Copy4x4; +extern VP8BlockCopy VP8Copy16x8; // Quantization struct VP8Matrix; // forward declaration typedef int (*VP8QuantizeBlock)(int16_t in[16], int16_t out[16], - int n, const struct VP8Matrix* const mtx); + const struct VP8Matrix* const mtx); +// Same as VP8QuantizeBlock, but quantizes two consecutive blocks. +typedef int (*VP8Quantize2Blocks)(int16_t in[32], int16_t out[32], + const struct VP8Matrix* const mtx); + extern VP8QuantizeBlock VP8EncQuantizeBlock; +extern VP8Quantize2Blocks VP8EncQuantize2Blocks; + +// specific to 2nd transform: +typedef int (*VP8QuantizeBlockWHT)(int16_t in[16], int16_t out[16], + const struct VP8Matrix* const mtx); +extern VP8QuantizeBlockWHT VP8EncQuantizeBlockWHT; -// Compute susceptibility based on DCT-coeff histograms: -// the higher, the "easier" the macroblock is to compress. -typedef int (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, - int start_block, int end_block); extern const int VP8DspScan[16 + 4 + 4]; + +// Collect histogram for susceptibility calculation. +#define MAX_COEFF_THRESH 31 // size of histogram used by CollectHistogram. +typedef struct { + // We only need to store max_value and last_non_zero, not the distribution. + int max_value; + int last_non_zero; +} VP8Histogram; +typedef void (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block, + VP8Histogram* const histo); extern VP8CHisto VP8CollectHistogram; +// General-purpose util function to help VP8CollectHistogram(). +void VP8SetHistogramData(const int distribution[MAX_COEFF_THRESH + 1], + VP8Histogram* const histo); + +// must be called before using any of the above +void VP8EncDspInit(void); + +//------------------------------------------------------------------------------ +// cost functions (encoding) + +extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p) +// approximate cost per level: +extern const uint16_t VP8LevelFixedCosts[2047 /*MAX_LEVEL*/ + 1]; +extern const uint8_t VP8EncBands[16 + 1]; + +struct VP8Residual; +typedef void (*VP8SetResidualCoeffsFunc)(const int16_t* const coeffs, + struct VP8Residual* const res); +extern VP8SetResidualCoeffsFunc VP8SetResidualCoeffs; -void VP8EncDspInit(void); // must be called before using any of the above +// Cost calculation function. +typedef int (*VP8GetResidualCostFunc)(int ctx0, + const struct VP8Residual* const res); +extern VP8GetResidualCostFunc VP8GetResidualCost; + +// must be called before anything using the above +void VP8EncDspCostInit(void); //------------------------------------------------------------------------------ // Decoding @@ -101,17 +223,26 @@ typedef void (*VP8DecIdct)(const int16_t* coeffs, uint8_t* dst); // when doing two transforms, coeffs is actually int16_t[2][16]. typedef void (*VP8DecIdct2)(const int16_t* coeffs, uint8_t* dst, int do_two); extern VP8DecIdct2 VP8Transform; +extern VP8DecIdct VP8TransformAC3; extern VP8DecIdct VP8TransformUV; extern VP8DecIdct VP8TransformDC; extern VP8DecIdct VP8TransformDCUV; -extern void (*VP8TransformWHT)(const int16_t* in, int16_t* out); +extern VP8WHT VP8TransformWHT; // *dst is the destination block, with stride BPS. Boundary samples are // assumed accessible when needed. typedef void (*VP8PredFunc)(uint8_t* dst); -extern const VP8PredFunc VP8PredLuma16[/* NUM_B_DC_MODES */]; -extern const VP8PredFunc VP8PredChroma8[/* NUM_B_DC_MODES */]; -extern const VP8PredFunc VP8PredLuma4[/* NUM_BMODES */]; +extern VP8PredFunc VP8PredLuma16[/* NUM_B_DC_MODES */]; +extern VP8PredFunc VP8PredChroma8[/* NUM_B_DC_MODES */]; +extern VP8PredFunc VP8PredLuma4[/* NUM_BMODES */]; + +// clipping tables (for filtering) +extern const int8_t* const VP8ksclip1; // clips [-1020, 1020] to [-128, 127] +extern const int8_t* const VP8ksclip2; // clips [-112, 112] to [-16, 15] +extern const uint8_t* const VP8kclip1; // clips [-255,511] to [0,255] +extern const uint8_t* const VP8kabs0; // abs(x) for x in [-255,255] +// must be called first +void VP8InitClipTables(void); // simple filter (only for luma) typedef void (*VP8SimpleFilterFunc)(uint8_t* p, int stride, int thresh); @@ -145,6 +276,8 @@ void VP8DspInit(void); #define FANCY_UPSAMPLING // undefined to remove fancy upsampling support +// Convert a pair of y/u/v lines together to the output rgb/a colorspace. +// bottom_y can be NULL if only one line of output is needed (at top/bottom). typedef void (*WebPUpsampleLinePairFunc)( const uint8_t* top_y, const uint8_t* bottom_y, const uint8_t* top_u, const uint8_t* top_v, @@ -156,18 +289,20 @@ typedef void (*WebPUpsampleLinePairFunc)( // Fancy upsampling functions to convert YUV to RGB(A) modes extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; -// Initializes SSE2 version of the fancy upsamplers. -void WebPInitUpsamplersSSE2(void); - #endif // FANCY_UPSAMPLING -// Point-sampling methods. -typedef void (*WebPSampleLinePairFunc)( - const uint8_t* top_y, const uint8_t* bottom_y, - const uint8_t* u, const uint8_t* v, - uint8_t* top_dst, uint8_t* bottom_dst, int len); +// Per-row point-sampling methods. +typedef void (*WebPSamplerRowFunc)(const uint8_t* y, + const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len); +// Generic function to apply 'WebPSamplerRowFunc' to the whole plane: +void WebPSamplerProcessPlane(const uint8_t* y, int y_stride, + const uint8_t* u, const uint8_t* v, int uv_stride, + uint8_t* dst, int dst_stride, + int width, int height, WebPSamplerRowFunc func); -extern const WebPSampleLinePairFunc WebPSamplers[/* MODE_LAST */]; +// Sampling functions to convert rows of YUV to RGB(A) +extern WebPSamplerRowFunc WebPSamplers[/* MODE_LAST */]; // General function for converting two lines of ARGB or RGBA. // 'alpha_is_last' should be true if 0xff000000 is stored in memory as @@ -179,13 +314,84 @@ typedef void (*WebPYUV444Converter)(const uint8_t* y, const uint8_t* u, const uint8_t* v, uint8_t* dst, int len); -extern const WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */]; +extern WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */]; -// Main function to be called +// Must be called before using the WebPUpsamplers[] (and for premultiplied +// colorspaces like rgbA, rgbA4444, etc) void WebPInitUpsamplers(void); +// Must be called before using WebPSamplers[] +void WebPInitSamplers(void); +// Must be called before using WebPYUV444Converters[] +void WebPInitYUV444Converters(void); //------------------------------------------------------------------------------ -// Pre-multiply planes with alpha values +// ARGB -> YUV converters + +// Convert ARGB samples to luma Y. +extern void (*WebPConvertARGBToY)(const uint32_t* argb, uint8_t* y, int width); +// Convert ARGB samples to U/V with downsampling. do_store should be '1' for +// even lines and '0' for odd ones. 'src_width' is the original width, not +// the U/V one. +extern void (*WebPConvertARGBToUV)(const uint32_t* argb, uint8_t* u, uint8_t* v, + int src_width, int do_store); + +// Convert a row of accumulated (four-values) of rgba32 toward U/V +extern void (*WebPConvertRGBA32ToUV)(const uint16_t* rgb, + uint8_t* u, uint8_t* v, int width); + +// Convert RGB or BGR to Y +extern void (*WebPConvertRGB24ToY)(const uint8_t* rgb, uint8_t* y, int width); +extern void (*WebPConvertBGR24ToY)(const uint8_t* bgr, uint8_t* y, int width); + +// used for plain-C fallback. +extern void WebPConvertARGBToUV_C(const uint32_t* argb, uint8_t* u, uint8_t* v, + int src_width, int do_store); +extern void WebPConvertRGBA32ToUV_C(const uint16_t* rgb, + uint8_t* u, uint8_t* v, int width); + +// Must be called before using the above. +void WebPInitConvertARGBToYUV(void); + +//------------------------------------------------------------------------------ +// Rescaler + +struct WebPRescaler; + +// Import a row of data and save its contribution in the rescaler. +// 'channel' denotes the channel number to be imported. 'Expand' corresponds to +// the wrk->x_expand case. Otherwise, 'Shrink' is to be used. +typedef void (*WebPRescalerImportRowFunc)(struct WebPRescaler* const wrk, + const uint8_t* src); + +extern WebPRescalerImportRowFunc WebPRescalerImportRowExpand; +extern WebPRescalerImportRowFunc WebPRescalerImportRowShrink; + +// Export one row (starting at x_out position) from rescaler. +// 'Expand' corresponds to the wrk->y_expand case. +// Otherwise 'Shrink' is to be used +typedef void (*WebPRescalerExportRowFunc)(struct WebPRescaler* const wrk); +extern WebPRescalerExportRowFunc WebPRescalerExportRowExpand; +extern WebPRescalerExportRowFunc WebPRescalerExportRowShrink; + +// Plain-C implementation, as fall-back. +extern void WebPRescalerImportRowExpandC(struct WebPRescaler* const wrk, + const uint8_t* src); +extern void WebPRescalerImportRowShrinkC(struct WebPRescaler* const wrk, + const uint8_t* src); +extern void WebPRescalerExportRowExpandC(struct WebPRescaler* const wrk); +extern void WebPRescalerExportRowShrinkC(struct WebPRescaler* const wrk); + +// Main entry calls: +extern void WebPRescalerImportRow(struct WebPRescaler* const wrk, + const uint8_t* src); +// Export one row (starting at x_out position) from rescaler. +extern void WebPRescalerExportRow(struct WebPRescaler* const wrk); + +// Must be called first before using the above. +void WebPRescalerDspInit(void); + +//------------------------------------------------------------------------------ +// Utilities for processing transparent channel. // Apply alpha pre-multiply on an rgba, bgra or argb plane of size w * h. // alpha_first should be 0 for argb, 1 for rgba or bgra (where alpha is last). @@ -196,14 +402,98 @@ extern void (*WebPApplyAlphaMultiply)( extern void (*WebPApplyAlphaMultiply4444)( uint8_t* rgba4444, int w, int h, int stride); +// Dispatch the values from alpha[] plane to the ARGB destination 'dst'. +// Returns true if alpha[] plane has non-trivial values different from 0xff. +extern int (*WebPDispatchAlpha)(const uint8_t* alpha, int alpha_stride, + int width, int height, + uint8_t* dst, int dst_stride); + +// Transfer packed 8b alpha[] values to green channel in dst[], zero'ing the +// A/R/B values. 'dst_stride' is the stride for dst[] in uint32_t units. +extern void (*WebPDispatchAlphaToGreen)(const uint8_t* alpha, int alpha_stride, + int width, int height, + uint32_t* dst, int dst_stride); + +// Extract the alpha values from 32b values in argb[] and pack them into alpha[] +// (this is the opposite of WebPDispatchAlpha). +// Returns true if there's only trivial 0xff alpha values. +extern int (*WebPExtractAlpha)(const uint8_t* argb, int argb_stride, + int width, int height, + uint8_t* alpha, int alpha_stride); + +// Pre-Multiply operation transforms x into x * A / 255 (where x=Y,R,G or B). +// Un-Multiply operation transforms x into x * 255 / A. + +// Pre-Multiply or Un-Multiply (if 'inverse' is true) argb values in a row. +extern void (*WebPMultARGBRow)(uint32_t* const ptr, int width, int inverse); + +// Same a WebPMultARGBRow(), but for several rows. +void WebPMultARGBRows(uint8_t* ptr, int stride, int width, int num_rows, + int inverse); + +// Same for a row of single values, with side alpha values. +extern void (*WebPMultRow)(uint8_t* const ptr, const uint8_t* const alpha, + int width, int inverse); + +// Same a WebPMultRow(), but for several 'num_rows' rows. +void WebPMultRows(uint8_t* ptr, int stride, + const uint8_t* alpha, int alpha_stride, + int width, int num_rows, int inverse); + +// Plain-C versions, used as fallback by some implementations. +void WebPMultRowC(uint8_t* const ptr, const uint8_t* const alpha, + int width, int inverse); +void WebPMultARGBRowC(uint32_t* const ptr, int width, int inverse); + // To be called first before using the above. -void WebPInitPremultiply(void); +void WebPInitAlphaProcessing(void); + +// ARGB packing function: a/r/g/b input is rgba or bgra order. +extern void (*VP8PackARGB)(const uint8_t* a, const uint8_t* r, + const uint8_t* g, const uint8_t* b, int len, + uint32_t* out); + +// RGB packing function. 'step' can be 3 or 4. r/g/b input is rgb or bgr order. +extern void (*VP8PackRGB)(const uint8_t* r, const uint8_t* g, const uint8_t* b, + int len, int step, uint32_t* out); -void WebPInitPremultiplySSE2(void); // should not be called directly. +// To be called first before using the above. +void VP8EncDspARGBInit(void); //------------------------------------------------------------------------------ +// Filter functions + +typedef enum { // Filter types. + WEBP_FILTER_NONE = 0, + WEBP_FILTER_HORIZONTAL, + WEBP_FILTER_VERTICAL, + WEBP_FILTER_GRADIENT, + WEBP_FILTER_LAST = WEBP_FILTER_GRADIENT + 1, // end marker + WEBP_FILTER_BEST, // meta-types + WEBP_FILTER_FAST +} WEBP_FILTER_TYPE; + +typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height, + int stride, uint8_t* out); +typedef void (*WebPUnfilterFunc)(int width, int height, int stride, + int row, int num_rows, uint8_t* data); + +// Filter the given data using the given predictor. +// 'in' corresponds to a 2-dimensional pixel array of size (stride * height) +// in raster order. +// 'stride' is number of bytes per scan line (with possible padding). +// 'out' should be pre-allocated. +extern WebPFilterFunc WebPFilters[WEBP_FILTER_LAST]; + +// In-place reconstruct the original data from the given filtered data. +// The reconstruction will be done for 'num_rows' rows starting from 'row' +// (assuming rows upto 'row - 1' are already reconstructed). +extern WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST]; + +// To be called first before using the above. +void VP8FiltersInit(void); -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/dsp/enc.c b/drivers/webp/dsp/enc.c index 02234564be..95e63f89ab 100644 --- a/drivers/webp/dsp/enc.c +++ b/drivers/webp/dsp/enc.c @@ -1,47 +1,34 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Speed-critical encoding functions. // // Author: Skal (pascal.massimino@gmail.com) +#include <assert.h> #include <stdlib.h> // for abs() + #include "./dsp.h" #include "../enc/vp8enci.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +static WEBP_INLINE uint8_t clip_8b(int v) { + return (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255; +} + +static WEBP_INLINE int clip_max(int v, int max) { + return (v > max) ? max : v; +} //------------------------------------------------------------------------------ // Compute susceptibility based on DCT-coeff histograms: // the higher, the "easier" the macroblock is to compress. -static int ClipAlpha(int alpha) { - return alpha < 0 ? 0 : alpha > 255 ? 255 : alpha; -} - -int VP8GetAlpha(const int histo[MAX_COEFF_THRESH + 1]) { - int num = 0, den = 0, val = 0; - int k; - int alpha; - // note: changing this loop to avoid the numerous "k + 1" slows things down. - for (k = 0; k < MAX_COEFF_THRESH; ++k) { - if (histo[k + 1]) { - val += histo[k + 1]; - num += val * (k + 1); - den += (k + 1) * (k + 1); - } - } - // we scale the value to a usable [0..255] range - alpha = den ? 10 * num / den - 5 : 0; - return ClipAlpha(alpha); -} - const int VP8DspScan[16 + 4 + 4] = { // Luma 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS, @@ -53,27 +40,41 @@ const int VP8DspScan[16 + 4 + 4] = { 8 + 0 * BPS, 12 + 0 * BPS, 8 + 4 * BPS, 12 + 4 * BPS // V }; -static int CollectHistogram(const uint8_t* ref, const uint8_t* pred, - int start_block, int end_block) { - int histo[MAX_COEFF_THRESH + 1] = { 0 }; - int16_t out[16]; - int j, k; +// general-purpose util function +void VP8SetHistogramData(const int distribution[MAX_COEFF_THRESH + 1], + VP8Histogram* const histo) { + int max_value = 0, last_non_zero = 1; + int k; + for (k = 0; k <= MAX_COEFF_THRESH; ++k) { + const int value = distribution[k]; + if (value > 0) { + if (value > max_value) max_value = value; + last_non_zero = k; + } + } + histo->max_value = max_value; + histo->last_non_zero = last_non_zero; +} + +static void CollectHistogram(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block, + VP8Histogram* const histo) { + int j; + int distribution[MAX_COEFF_THRESH + 1] = { 0 }; for (j = start_block; j < end_block; ++j) { - VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); + int k; + int16_t out[16]; - // Convert coefficients to bin (within out[]). - for (k = 0; k < 16; ++k) { - const int v = abs(out[k]) >> 2; - out[k] = (v > MAX_COEFF_THRESH) ? MAX_COEFF_THRESH : v; - } + VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); - // Use bin to update histogram. + // Convert coefficients to bin. for (k = 0; k < 16; ++k) { - histo[out[k]]++; + const int v = abs(out[k]) >> 3; // TODO(skal): add rounding? + const int clipped_value = clip_max(v, MAX_COEFF_THRESH); + ++distribution[clipped_value]; } } - - return VP8GetAlpha(histo); + VP8SetHistogramData(distribution, histo); } //------------------------------------------------------------------------------ @@ -85,19 +86,16 @@ static uint8_t clip1[255 + 510 + 1]; // clips [-255,510] to [0,255] // and make sure it's set to true _last_ (so as to be thread-safe) static volatile int tables_ok = 0; -static void InitTables(void) { +static WEBP_TSAN_IGNORE_FUNCTION void InitTables(void) { if (!tables_ok) { int i; for (i = -255; i <= 255 + 255; ++i) { - clip1[255 + i] = (i < 0) ? 0 : (i > 255) ? 255 : i; + clip1[255 + i] = clip_8b(i); } tables_ok = 1; } } -static WEBP_INLINE uint8_t clip_8b(int v) { - return (!(v & ~0xff)) ? v : v < 0 ? 0 : 255; -} //------------------------------------------------------------------------------ // Transforms (Paragraph 14.4) @@ -154,84 +152,63 @@ static void FTransform(const uint8_t* src, const uint8_t* ref, int16_t* out) { int i; int tmp[16]; for (i = 0; i < 4; ++i, src += BPS, ref += BPS) { - const int d0 = src[0] - ref[0]; + const int d0 = src[0] - ref[0]; // 9bit dynamic range ([-255,255]) const int d1 = src[1] - ref[1]; const int d2 = src[2] - ref[2]; const int d3 = src[3] - ref[3]; - const int a0 = (d0 + d3) << 3; - const int a1 = (d1 + d2) << 3; - const int a2 = (d1 - d2) << 3; - const int a3 = (d0 - d3) << 3; - tmp[0 + i * 4] = (a0 + a1); - tmp[1 + i * 4] = (a2 * 2217 + a3 * 5352 + 14500) >> 12; - tmp[2 + i * 4] = (a0 - a1); - tmp[3 + i * 4] = (a3 * 2217 - a2 * 5352 + 7500) >> 12; + const int a0 = (d0 + d3); // 10b [-510,510] + const int a1 = (d1 + d2); + const int a2 = (d1 - d2); + const int a3 = (d0 - d3); + tmp[0 + i * 4] = (a0 + a1) * 8; // 14b [-8160,8160] + tmp[1 + i * 4] = (a2 * 2217 + a3 * 5352 + 1812) >> 9; // [-7536,7542] + tmp[2 + i * 4] = (a0 - a1) * 8; + tmp[3 + i * 4] = (a3 * 2217 - a2 * 5352 + 937) >> 9; } for (i = 0; i < 4; ++i) { - const int a0 = (tmp[0 + i] + tmp[12 + i]); + const int a0 = (tmp[0 + i] + tmp[12 + i]); // 15b const int a1 = (tmp[4 + i] + tmp[ 8 + i]); const int a2 = (tmp[4 + i] - tmp[ 8 + i]); const int a3 = (tmp[0 + i] - tmp[12 + i]); - out[0 + i] = (a0 + a1 + 7) >> 4; + out[0 + i] = (a0 + a1 + 7) >> 4; // 12b out[4 + i] = ((a2 * 2217 + a3 * 5352 + 12000) >> 16) + (a3 != 0); out[8 + i] = (a0 - a1 + 7) >> 4; out[12+ i] = ((a3 * 2217 - a2 * 5352 + 51000) >> 16); } } -static void ITransformWHT(const int16_t* in, int16_t* out) { - int tmp[16]; - int i; - for (i = 0; i < 4; ++i) { - const int a0 = in[0 + i] + in[12 + i]; - const int a1 = in[4 + i] + in[ 8 + i]; - const int a2 = in[4 + i] - in[ 8 + i]; - const int a3 = in[0 + i] - in[12 + i]; - tmp[0 + i] = a0 + a1; - tmp[8 + i] = a0 - a1; - tmp[4 + i] = a3 + a2; - tmp[12 + i] = a3 - a2; - } - for (i = 0; i < 4; ++i) { - const int dc = tmp[0 + i * 4] + 3; // w/ rounder - const int a0 = dc + tmp[3 + i * 4]; - const int a1 = tmp[1 + i * 4] + tmp[2 + i * 4]; - const int a2 = tmp[1 + i * 4] - tmp[2 + i * 4]; - const int a3 = dc - tmp[3 + i * 4]; - out[ 0] = (a0 + a1) >> 3; - out[16] = (a3 + a2) >> 3; - out[32] = (a0 - a1) >> 3; - out[48] = (a3 - a2) >> 3; - out += 64; - } +static void FTransform2(const uint8_t* src, const uint8_t* ref, int16_t* out) { + VP8FTransform(src, ref, out); + VP8FTransform(src + 4, ref + 4, out + 16); } static void FTransformWHT(const int16_t* in, int16_t* out) { - int tmp[16]; + // input is 12b signed + int32_t tmp[16]; int i; for (i = 0; i < 4; ++i, in += 64) { - const int a0 = (in[0 * 16] + in[2 * 16]) << 2; - const int a1 = (in[1 * 16] + in[3 * 16]) << 2; - const int a2 = (in[1 * 16] - in[3 * 16]) << 2; - const int a3 = (in[0 * 16] - in[2 * 16]) << 2; - tmp[0 + i * 4] = (a0 + a1) + (a0 != 0); + const int a0 = (in[0 * 16] + in[2 * 16]); // 13b + const int a1 = (in[1 * 16] + in[3 * 16]); + const int a2 = (in[1 * 16] - in[3 * 16]); + const int a3 = (in[0 * 16] - in[2 * 16]); + tmp[0 + i * 4] = a0 + a1; // 14b tmp[1 + i * 4] = a3 + a2; tmp[2 + i * 4] = a3 - a2; tmp[3 + i * 4] = a0 - a1; } for (i = 0; i < 4; ++i) { - const int a0 = (tmp[0 + i] + tmp[8 + i]); + const int a0 = (tmp[0 + i] + tmp[8 + i]); // 15b const int a1 = (tmp[4 + i] + tmp[12+ i]); const int a2 = (tmp[4 + i] - tmp[12+ i]); const int a3 = (tmp[0 + i] - tmp[8 + i]); - const int b0 = a0 + a1; + const int b0 = a0 + a1; // 16b const int b1 = a3 + a2; const int b2 = a3 - a2; const int b3 = a0 - a1; - out[ 0 + i] = (b0 + (b0 > 0) + 3) >> 3; - out[ 4 + i] = (b1 + (b1 > 0) + 3) >> 3; - out[ 8 + i] = (b2 + (b2 > 0) + 3) >> 3; - out[12 + i] = (b3 + (b3 > 0) + 3) >> 3; + out[ 0 + i] = b0 >> 1; // 15b + out[ 4 + i] = b1 >> 1; + out[ 8 + i] = b2 >> 1; + out[12 + i] = b3 >> 1; } } @@ -241,8 +218,6 @@ static void FTransformWHT(const int16_t* in, int16_t* out) { //------------------------------------------------------------------------------ // Intra predictions -#define DST(x, y) dst[(x) + (y) * BPS] - static WEBP_INLINE void Fill(uint8_t* dst, int value, int size) { int j; for (j = 0; j < size; ++j) { @@ -253,7 +228,7 @@ static WEBP_INLINE void Fill(uint8_t* dst, int value, int size) { static WEBP_INLINE void VerticalPred(uint8_t* dst, const uint8_t* top, int size) { int j; - if (top) { + if (top != NULL) { for (j = 0; j < size; ++j) memcpy(dst + j * BPS, top, size); } else { Fill(dst, 127, size); @@ -262,7 +237,7 @@ static WEBP_INLINE void VerticalPred(uint8_t* dst, static WEBP_INLINE void HorizontalPred(uint8_t* dst, const uint8_t* left, int size) { - if (left) { + if (left != NULL) { int j; for (j = 0; j < size; ++j) { memset(dst + j * BPS, left[j], size); @@ -275,8 +250,8 @@ static WEBP_INLINE void HorizontalPred(uint8_t* dst, static WEBP_INLINE void TrueMotion(uint8_t* dst, const uint8_t* left, const uint8_t* top, int size) { int y; - if (left) { - if (top) { + if (left != NULL) { + if (top != NULL) { const uint8_t* const clip = clip1 + 255 - left[-1]; for (y = 0; y < size; ++y) { const uint8_t* const clip_table = clip + left[y]; @@ -294,7 +269,7 @@ static WEBP_INLINE void TrueMotion(uint8_t* dst, const uint8_t* left, // is equivalent to VE prediction where you just copy the top samples. // Note that if top samples are not available, the default value is // then 129, and not 127 as in the VerticalPred case. - if (top) { + if (top != NULL) { VerticalPred(dst, top, size); } else { Fill(dst, 129, size); @@ -307,15 +282,15 @@ static WEBP_INLINE void DCMode(uint8_t* dst, const uint8_t* left, int size, int round, int shift) { int DC = 0; int j; - if (top) { + if (top != NULL) { for (j = 0; j < size; ++j) DC += top[j]; - if (left) { // top and left present + if (left != NULL) { // top and left present for (j = 0; j < size; ++j) DC += left[j]; } else { // top, but no left DC += DC; } DC = (DC + round) >> shift; - } else if (left) { // left but no top + } else if (left != NULL) { // left but no top for (j = 0; j < size; ++j) DC += left[j]; DC += DC; DC = (DC + round) >> shift; @@ -337,8 +312,8 @@ static void IntraChromaPreds(uint8_t* dst, const uint8_t* left, TrueMotion(C8TM8 + dst, left, top, 8); // V block dst += 8; - if (top) top += 8; - if (left) left += 16; + if (top != NULL) top += 8; + if (left != NULL) left += 16; DCMode(C8DC8 + dst, left, top, 8, 8, 4); VerticalPred(C8VE8 + dst, top, 8); HorizontalPred(C8HE8 + dst, left, 8); @@ -359,6 +334,7 @@ static void Intra16Preds(uint8_t* dst, //------------------------------------------------------------------------------ // luma 4x4 prediction +#define DST(x, y) dst[(x) + (y) * BPS] #define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2) #define AVG2(a, b) (((a) + (b) + 1) >> 1) @@ -589,30 +565,30 @@ static int TTransform(const uint8_t* in, const uint16_t* w) { int i; // horizontal pass for (i = 0; i < 4; ++i, in += BPS) { - const int a0 = (in[0] + in[2]) << 2; - const int a1 = (in[1] + in[3]) << 2; - const int a2 = (in[1] - in[3]) << 2; - const int a3 = (in[0] - in[2]) << 2; - tmp[0 + i * 4] = a0 + a1 + (a0 != 0); + const int a0 = in[0] + in[2]; + const int a1 = in[1] + in[3]; + const int a2 = in[1] - in[3]; + const int a3 = in[0] - in[2]; + tmp[0 + i * 4] = a0 + a1; tmp[1 + i * 4] = a3 + a2; tmp[2 + i * 4] = a3 - a2; tmp[3 + i * 4] = a0 - a1; } // vertical pass for (i = 0; i < 4; ++i, ++w) { - const int a0 = (tmp[0 + i] + tmp[8 + i]); - const int a1 = (tmp[4 + i] + tmp[12+ i]); - const int a2 = (tmp[4 + i] - tmp[12+ i]); - const int a3 = (tmp[0 + i] - tmp[8 + i]); + const int a0 = tmp[0 + i] + tmp[8 + i]; + const int a1 = tmp[4 + i] + tmp[12+ i]; + const int a2 = tmp[4 + i] - tmp[12+ i]; + const int a3 = tmp[0 + i] - tmp[8 + i]; const int b0 = a0 + a1; const int b1 = a3 + a2; const int b2 = a3 - a2; const int b3 = a0 - a1; - // abs((b + (b<0) + 3) >> 3) = (abs(b) + 3) >> 3 - sum += w[ 0] * ((abs(b0) + 3) >> 3); - sum += w[ 4] * ((abs(b1) + 3) >> 3); - sum += w[ 8] * ((abs(b2) + 3) >> 3); - sum += w[12] * ((abs(b3) + 3) >> 3); + + sum += w[ 0] * abs(b0); + sum += w[ 4] * abs(b1); + sum += w[ 8] * abs(b2); + sum += w[12] * abs(b3); } return sum; } @@ -621,7 +597,7 @@ static int Disto4x4(const uint8_t* const a, const uint8_t* const b, const uint16_t* const w) { const int sum1 = TTransform(a, w); const int sum2 = TTransform(b, w); - return (abs(sum2 - sum1) + 8) >> 4; + return abs(sum2 - sum1) >> 5; } static int Disto16x16(const uint8_t* const a, const uint8_t* const b, @@ -646,21 +622,57 @@ static const uint8_t kZigzag[16] = { // Simple quantization static int QuantizeBlock(int16_t in[16], int16_t out[16], - int n, const VP8Matrix* const mtx) { + const VP8Matrix* const mtx) { int last = -1; - for (; n < 16; ++n) { + int n; + for (n = 0; n < 16; ++n) { + const int j = kZigzag[n]; + const int sign = (in[j] < 0); + const uint32_t coeff = (sign ? -in[j] : in[j]) + mtx->sharpen_[j]; + if (coeff > mtx->zthresh_[j]) { + const uint32_t Q = mtx->q_[j]; + const uint32_t iQ = mtx->iq_[j]; + const uint32_t B = mtx->bias_[j]; + int level = QUANTDIV(coeff, iQ, B); + if (level > MAX_LEVEL) level = MAX_LEVEL; + if (sign) level = -level; + in[j] = level * Q; + out[n] = level; + if (level) last = n; + } else { + out[n] = 0; + in[j] = 0; + } + } + return (last >= 0); +} + +static int Quantize2Blocks(int16_t in[32], int16_t out[32], + const VP8Matrix* const mtx) { + int nz; + nz = VP8EncQuantizeBlock(in + 0 * 16, out + 0 * 16, mtx) << 0; + nz |= VP8EncQuantizeBlock(in + 1 * 16, out + 1 * 16, mtx) << 1; + return nz; +} + +static int QuantizeBlockWHT(int16_t in[16], int16_t out[16], + const VP8Matrix* const mtx) { + int n, last = -1; + for (n = 0; n < 16; ++n) { const int j = kZigzag[n]; const int sign = (in[j] < 0); - int coeff = (sign ? -in[j] : in[j]) + mtx->sharpen_[j]; - if (coeff > 2047) coeff = 2047; + const uint32_t coeff = sign ? -in[j] : in[j]; + assert(mtx->sharpen_[j] == 0); if (coeff > mtx->zthresh_[j]) { - const int Q = mtx->q_[j]; - const int iQ = mtx->iq_[j]; - const int B = mtx->bias_[j]; - out[n] = QUANTDIV(coeff, iQ, B); - if (sign) out[n] = -out[n]; - in[j] = out[n] * Q; - if (out[n]) last = n; + const uint32_t Q = mtx->q_[j]; + const uint32_t iQ = mtx->iq_[j]; + const uint32_t B = mtx->bias_[j]; + int level = QUANTDIV(coeff, iQ, B); + if (level > MAX_LEVEL) level = MAX_LEVEL; + if (sign) level = -level; + in[j] = level * Q; + out[n] = level; + if (level) last = n; } else { out[n] = 0; in[j] = 0; @@ -672,16 +684,22 @@ static int QuantizeBlock(int16_t in[16], int16_t out[16], //------------------------------------------------------------------------------ // Block copy -static WEBP_INLINE void Copy(const uint8_t* src, uint8_t* dst, int size) { +static WEBP_INLINE void Copy(const uint8_t* src, uint8_t* dst, int w, int h) { int y; - for (y = 0; y < size; ++y) { - memcpy(dst, src, size); + for (y = 0; y < h; ++y) { + memcpy(dst, src, w); src += BPS; dst += BPS; } } -static void Copy4x4(const uint8_t* src, uint8_t* dst) { Copy(src, dst, 4); } +static void Copy4x4(const uint8_t* src, uint8_t* dst) { + Copy(src, dst, 4, 4); +} + +static void Copy16x8(const uint8_t* src, uint8_t* dst) { + Copy(src, dst, 16, 8); +} //------------------------------------------------------------------------------ // Initialization @@ -691,7 +709,7 @@ static void Copy4x4(const uint8_t* src, uint8_t* dst) { Copy(src, dst, 4); } VP8CHisto VP8CollectHistogram; VP8Idct VP8ITransform; VP8Fdct VP8FTransform; -VP8WHT VP8ITransformWHT; +VP8Fdct VP8FTransform2; VP8WHT VP8FTransformWHT; VP8Intra4Preds VP8EncPredLuma4; VP8IntraPreds VP8EncPredLuma16; @@ -703,18 +721,32 @@ VP8Metric VP8SSE4x4; VP8WMetric VP8TDisto4x4; VP8WMetric VP8TDisto16x16; VP8QuantizeBlock VP8EncQuantizeBlock; +VP8Quantize2Blocks VP8EncQuantize2Blocks; +VP8QuantizeBlockWHT VP8EncQuantizeBlockWHT; VP8BlockCopy VP8Copy4x4; +VP8BlockCopy VP8Copy16x8; extern void VP8EncDspInitSSE2(void); +extern void VP8EncDspInitSSE41(void); +extern void VP8EncDspInitAVX2(void); +extern void VP8EncDspInitNEON(void); +extern void VP8EncDspInitMIPS32(void); +extern void VP8EncDspInitMIPSdspR2(void); + +static volatile VP8CPUInfo enc_last_cpuinfo_used = + (VP8CPUInfo)&enc_last_cpuinfo_used; -void VP8EncDspInit(void) { +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInit(void) { + if (enc_last_cpuinfo_used == VP8GetCPUInfo) return; + + VP8DspInit(); // common inverse transforms InitTables(); // default C implementations VP8CollectHistogram = CollectHistogram; VP8ITransform = ITransform; VP8FTransform = FTransform; - VP8ITransformWHT = ITransformWHT; + VP8FTransform2 = FTransform2; VP8FTransformWHT = FTransformWHT; VP8EncPredLuma4 = Intra4Preds; VP8EncPredLuma16 = Intra16Preds; @@ -726,18 +758,43 @@ void VP8EncDspInit(void) { VP8TDisto4x4 = Disto4x4; VP8TDisto16x16 = Disto16x16; VP8EncQuantizeBlock = QuantizeBlock; + VP8EncQuantize2Blocks = Quantize2Blocks; + VP8EncQuantizeBlockWHT = QuantizeBlockWHT; VP8Copy4x4 = Copy4x4; + VP8Copy16x8 = Copy16x8; // If defined, use CPUInfo() to overwrite some pointers with faster versions. - if (VP8GetCPUInfo) { + if (VP8GetCPUInfo != NULL) { #if defined(WEBP_USE_SSE2) if (VP8GetCPUInfo(kSSE2)) { VP8EncDspInitSSE2(); +#if defined(WEBP_USE_SSE41) + if (VP8GetCPUInfo(kSSE4_1)) { + VP8EncDspInitSSE41(); + } +#endif + } +#endif +#if defined(WEBP_USE_AVX2) + if (VP8GetCPUInfo(kAVX2)) { + VP8EncDspInitAVX2(); + } +#endif +#if defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + VP8EncDspInitNEON(); + } +#endif +#if defined(WEBP_USE_MIPS32) + if (VP8GetCPUInfo(kMIPS32)) { + VP8EncDspInitMIPS32(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + VP8EncDspInitMIPSdspR2(); } #endif } + enc_last_cpuinfo_used = VP8GetCPUInfo; } - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/dsp/enc_sse2.c b/drivers/webp/dsp/enc_sse2.c index b046761dc1..63d9cecd85 100644 --- a/drivers/webp/dsp/enc_sse2.c +++ b/drivers/webp/dsp/enc_sse2.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // SSE2 version of speed-critical encoding functions. @@ -15,64 +17,55 @@ #include <stdlib.h> // for abs() #include <emmintrin.h> +#include "../enc/cost.h" #include "../enc/vp8enci.h" +#include "../utils/utils.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { +//------------------------------------------------------------------------------ +// Quite useful macro for debugging. Left here for convenience. + +#if 0 +#include <stdio.h> +static void PrintReg(const __m128i r, const char* const name, int size) { + int n; + union { + __m128i r; + uint8_t i8[16]; + uint16_t i16[8]; + uint32_t i32[4]; + uint64_t i64[2]; + } tmp; + tmp.r = r; + fprintf(stderr, "%s\t: ", name); + if (size == 8) { + for (n = 0; n < 16; ++n) fprintf(stderr, "%.2x ", tmp.i8[n]); + } else if (size == 16) { + for (n = 0; n < 8; ++n) fprintf(stderr, "%.4x ", tmp.i16[n]); + } else if (size == 32) { + for (n = 0; n < 4; ++n) fprintf(stderr, "%.8x ", tmp.i32[n]); + } else { + for (n = 0; n < 2; ++n) fprintf(stderr, "%.16lx ", tmp.i64[n]); + } + fprintf(stderr, "\n"); +} #endif //------------------------------------------------------------------------------ -// Compute susceptibility based on DCT-coeff histograms: -// the higher, the "easier" the macroblock is to compress. - -static int CollectHistogramSSE2(const uint8_t* ref, const uint8_t* pred, - int start_block, int end_block) { - int histo[MAX_COEFF_THRESH + 1] = { 0 }; - int16_t out[16]; - int j, k; - const __m128i max_coeff_thresh = _mm_set1_epi16(MAX_COEFF_THRESH); - for (j = start_block; j < end_block; ++j) { - VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); - - // Convert coefficients to bin (within out[]). - { - // Load. - const __m128i out0 = _mm_loadu_si128((__m128i*)&out[0]); - const __m128i out1 = _mm_loadu_si128((__m128i*)&out[8]); - // sign(out) = out >> 15 (0x0000 if positive, 0xffff if negative) - const __m128i sign0 = _mm_srai_epi16(out0, 15); - const __m128i sign1 = _mm_srai_epi16(out1, 15); - // abs(out) = (out ^ sign) - sign - const __m128i xor0 = _mm_xor_si128(out0, sign0); - const __m128i xor1 = _mm_xor_si128(out1, sign1); - const __m128i abs0 = _mm_sub_epi16(xor0, sign0); - const __m128i abs1 = _mm_sub_epi16(xor1, sign1); - // v = abs(out) >> 2 - const __m128i v0 = _mm_srai_epi16(abs0, 2); - const __m128i v1 = _mm_srai_epi16(abs1, 2); - // bin = min(v, MAX_COEFF_THRESH) - const __m128i bin0 = _mm_min_epi16(v0, max_coeff_thresh); - const __m128i bin1 = _mm_min_epi16(v1, max_coeff_thresh); - // Store. - _mm_storeu_si128((__m128i*)&out[0], bin0); - _mm_storeu_si128((__m128i*)&out[8], bin1); - } +// util for unaligned loads. - // Use bin to update histogram. - for (k = 0; k < 16; ++k) { - histo[out[k]]++; - } - } - - return VP8GetAlpha(histo); +// memcpy() is the safe way of moving potentially unaligned 32b memory. +static WEBP_INLINE uint32_t MemToUint32(const uint8_t* const ptr) { + uint32_t A; + memcpy(&A, (const int*)ptr, sizeof(A)); + return A; } //------------------------------------------------------------------------------ // Transforms (Paragraph 14.4) // Does one or two inverse transforms. -static void ITransformSSE2(const uint8_t* ref, const int16_t* in, uint8_t* dst, - int do_two) { +static void ITransform(const uint8_t* ref, const int16_t* in, uint8_t* dst, + int do_two) { // This implementation makes use of 16-bit fixed point versions of two // multiply constants: // K1 = sqrt(2) * cos (pi/8) ~= 85627 / 2^16 @@ -99,19 +92,19 @@ static void ITransformSSE2(const uint8_t* ref, const int16_t* in, uint8_t* dst, // use nor store. __m128i in0, in1, in2, in3; { - in0 = _mm_loadl_epi64((__m128i*)&in[0]); - in1 = _mm_loadl_epi64((__m128i*)&in[4]); - in2 = _mm_loadl_epi64((__m128i*)&in[8]); - in3 = _mm_loadl_epi64((__m128i*)&in[12]); + in0 = _mm_loadl_epi64((const __m128i*)&in[0]); + in1 = _mm_loadl_epi64((const __m128i*)&in[4]); + in2 = _mm_loadl_epi64((const __m128i*)&in[8]); + in3 = _mm_loadl_epi64((const __m128i*)&in[12]); // a00 a10 a20 a30 x x x x // a01 a11 a21 a31 x x x x // a02 a12 a22 a32 x x x x // a03 a13 a23 a33 x x x x if (do_two) { - const __m128i inB0 = _mm_loadl_epi64((__m128i*)&in[16]); - const __m128i inB1 = _mm_loadl_epi64((__m128i*)&in[20]); - const __m128i inB2 = _mm_loadl_epi64((__m128i*)&in[24]); - const __m128i inB3 = _mm_loadl_epi64((__m128i*)&in[28]); + const __m128i inB0 = _mm_loadl_epi64((const __m128i*)&in[16]); + const __m128i inB1 = _mm_loadl_epi64((const __m128i*)&in[20]); + const __m128i inB2 = _mm_loadl_epi64((const __m128i*)&in[24]); + const __m128i inB3 = _mm_loadl_epi64((const __m128i*)&in[28]); in0 = _mm_unpacklo_epi64(in0, inB0); in1 = _mm_unpacklo_epi64(in1, inB1); in2 = _mm_unpacklo_epi64(in2, inB2); @@ -243,21 +236,21 @@ static void ITransformSSE2(const uint8_t* ref, const int16_t* in, uint8_t* dst, // Add inverse transform to 'ref' and store. { - const __m128i zero = _mm_set1_epi16(0); + const __m128i zero = _mm_setzero_si128(); // Load the reference(s). __m128i ref0, ref1, ref2, ref3; if (do_two) { // Load eight bytes/pixels per line. - ref0 = _mm_loadl_epi64((__m128i*)&ref[0 * BPS]); - ref1 = _mm_loadl_epi64((__m128i*)&ref[1 * BPS]); - ref2 = _mm_loadl_epi64((__m128i*)&ref[2 * BPS]); - ref3 = _mm_loadl_epi64((__m128i*)&ref[3 * BPS]); + ref0 = _mm_loadl_epi64((const __m128i*)&ref[0 * BPS]); + ref1 = _mm_loadl_epi64((const __m128i*)&ref[1 * BPS]); + ref2 = _mm_loadl_epi64((const __m128i*)&ref[2 * BPS]); + ref3 = _mm_loadl_epi64((const __m128i*)&ref[3 * BPS]); } else { // Load four bytes/pixels per line. - ref0 = _mm_cvtsi32_si128(*(int*)&ref[0 * BPS]); - ref1 = _mm_cvtsi32_si128(*(int*)&ref[1 * BPS]); - ref2 = _mm_cvtsi32_si128(*(int*)&ref[2 * BPS]); - ref3 = _mm_cvtsi32_si128(*(int*)&ref[3 * BPS]); + ref0 = _mm_cvtsi32_si128(MemToUint32(&ref[0 * BPS])); + ref1 = _mm_cvtsi32_si128(MemToUint32(&ref[1 * BPS])); + ref2 = _mm_cvtsi32_si128(MemToUint32(&ref[2 * BPS])); + ref3 = _mm_cvtsi32_si128(MemToUint32(&ref[3 * BPS])); } // Convert to 16b. ref0 = _mm_unpacklo_epi8(ref0, zero); @@ -291,200 +284,865 @@ static void ITransformSSE2(const uint8_t* ref, const int16_t* in, uint8_t* dst, } } -static void FTransformSSE2(const uint8_t* src, const uint8_t* ref, - int16_t* out) { +static void FTransformPass1(const __m128i* const in01, + const __m128i* const in23, + __m128i* const out01, + __m128i* const out32) { + const __m128i k937 = _mm_set1_epi32(937); + const __m128i k1812 = _mm_set1_epi32(1812); + + const __m128i k88p = _mm_set_epi16(8, 8, 8, 8, 8, 8, 8, 8); + const __m128i k88m = _mm_set_epi16(-8, 8, -8, 8, -8, 8, -8, 8); + const __m128i k5352_2217p = _mm_set_epi16(2217, 5352, 2217, 5352, + 2217, 5352, 2217, 5352); + const __m128i k5352_2217m = _mm_set_epi16(-5352, 2217, -5352, 2217, + -5352, 2217, -5352, 2217); + + // *in01 = 00 01 10 11 02 03 12 13 + // *in23 = 20 21 30 31 22 23 32 33 + const __m128i shuf01_p = _mm_shufflehi_epi16(*in01, _MM_SHUFFLE(2, 3, 0, 1)); + const __m128i shuf23_p = _mm_shufflehi_epi16(*in23, _MM_SHUFFLE(2, 3, 0, 1)); + // 00 01 10 11 03 02 13 12 + // 20 21 30 31 23 22 33 32 + const __m128i s01 = _mm_unpacklo_epi64(shuf01_p, shuf23_p); + const __m128i s32 = _mm_unpackhi_epi64(shuf01_p, shuf23_p); + // 00 01 10 11 20 21 30 31 + // 03 02 13 12 23 22 33 32 + const __m128i a01 = _mm_add_epi16(s01, s32); + const __m128i a32 = _mm_sub_epi16(s01, s32); + // [d0 + d3 | d1 + d2 | ...] = [a0 a1 | a0' a1' | ... ] + // [d0 - d3 | d1 - d2 | ...] = [a3 a2 | a3' a2' | ... ] + + const __m128i tmp0 = _mm_madd_epi16(a01, k88p); // [ (a0 + a1) << 3, ... ] + const __m128i tmp2 = _mm_madd_epi16(a01, k88m); // [ (a0 - a1) << 3, ... ] + const __m128i tmp1_1 = _mm_madd_epi16(a32, k5352_2217p); + const __m128i tmp3_1 = _mm_madd_epi16(a32, k5352_2217m); + const __m128i tmp1_2 = _mm_add_epi32(tmp1_1, k1812); + const __m128i tmp3_2 = _mm_add_epi32(tmp3_1, k937); + const __m128i tmp1 = _mm_srai_epi32(tmp1_2, 9); + const __m128i tmp3 = _mm_srai_epi32(tmp3_2, 9); + const __m128i s03 = _mm_packs_epi32(tmp0, tmp2); + const __m128i s12 = _mm_packs_epi32(tmp1, tmp3); + const __m128i s_lo = _mm_unpacklo_epi16(s03, s12); // 0 1 0 1 0 1... + const __m128i s_hi = _mm_unpackhi_epi16(s03, s12); // 2 3 2 3 2 3 + const __m128i v23 = _mm_unpackhi_epi32(s_lo, s_hi); + *out01 = _mm_unpacklo_epi32(s_lo, s_hi); + *out32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); // 3 2 3 2 3 2.. +} + +static void FTransformPass2(const __m128i* const v01, const __m128i* const v32, + int16_t* out) { const __m128i zero = _mm_setzero_si128(); const __m128i seven = _mm_set1_epi16(7); - const __m128i k7500 = _mm_set1_epi32(7500); - const __m128i k14500 = _mm_set1_epi32(14500); - const __m128i k51000 = _mm_set1_epi32(51000); - const __m128i k12000_plus_one = _mm_set1_epi32(12000 + (1 << 16)); const __m128i k5352_2217 = _mm_set_epi16(5352, 2217, 5352, 2217, 5352, 2217, 5352, 2217); const __m128i k2217_5352 = _mm_set_epi16(2217, -5352, 2217, -5352, 2217, -5352, 2217, -5352); + const __m128i k12000_plus_one = _mm_set1_epi32(12000 + (1 << 16)); + const __m128i k51000 = _mm_set1_epi32(51000); + + // Same operations are done on the (0,3) and (1,2) pairs. + // a0 = v0 + v3 + // a1 = v1 + v2 + // a3 = v0 - v3 + // a2 = v1 - v2 + const __m128i a01 = _mm_add_epi16(*v01, *v32); + const __m128i a32 = _mm_sub_epi16(*v01, *v32); + const __m128i a11 = _mm_unpackhi_epi64(a01, a01); + const __m128i a22 = _mm_unpackhi_epi64(a32, a32); + const __m128i a01_plus_7 = _mm_add_epi16(a01, seven); + + // d0 = (a0 + a1 + 7) >> 4; + // d2 = (a0 - a1 + 7) >> 4; + const __m128i c0 = _mm_add_epi16(a01_plus_7, a11); + const __m128i c2 = _mm_sub_epi16(a01_plus_7, a11); + const __m128i d0 = _mm_srai_epi16(c0, 4); + const __m128i d2 = _mm_srai_epi16(c2, 4); + + // f1 = ((b3 * 5352 + b2 * 2217 + 12000) >> 16) + // f3 = ((b3 * 2217 - b2 * 5352 + 51000) >> 16) + const __m128i b23 = _mm_unpacklo_epi16(a22, a32); + const __m128i c1 = _mm_madd_epi16(b23, k5352_2217); + const __m128i c3 = _mm_madd_epi16(b23, k2217_5352); + const __m128i d1 = _mm_add_epi32(c1, k12000_plus_one); + const __m128i d3 = _mm_add_epi32(c3, k51000); + const __m128i e1 = _mm_srai_epi32(d1, 16); + const __m128i e3 = _mm_srai_epi32(d3, 16); + const __m128i f1 = _mm_packs_epi32(e1, e1); + const __m128i f3 = _mm_packs_epi32(e3, e3); + // f1 = f1 + (a3 != 0); + // The compare will return (0xffff, 0) for (==0, !=0). To turn that into the + // desired (0, 1), we add one earlier through k12000_plus_one. + // -> f1 = f1 + 1 - (a3 == 0) + const __m128i g1 = _mm_add_epi16(f1, _mm_cmpeq_epi16(a32, zero)); + + const __m128i d0_g1 = _mm_unpacklo_epi64(d0, g1); + const __m128i d2_f3 = _mm_unpacklo_epi64(d2, f3); + _mm_storeu_si128((__m128i*)&out[0], d0_g1); + _mm_storeu_si128((__m128i*)&out[8], d2_f3); +} + +static void FTransform(const uint8_t* src, const uint8_t* ref, int16_t* out) { + const __m128i zero = _mm_setzero_si128(); + // Load src and convert to 16b. + const __m128i src0 = _mm_loadl_epi64((const __m128i*)&src[0 * BPS]); + const __m128i src1 = _mm_loadl_epi64((const __m128i*)&src[1 * BPS]); + const __m128i src2 = _mm_loadl_epi64((const __m128i*)&src[2 * BPS]); + const __m128i src3 = _mm_loadl_epi64((const __m128i*)&src[3 * BPS]); + const __m128i src_0 = _mm_unpacklo_epi8(src0, zero); + const __m128i src_1 = _mm_unpacklo_epi8(src1, zero); + const __m128i src_2 = _mm_unpacklo_epi8(src2, zero); + const __m128i src_3 = _mm_unpacklo_epi8(src3, zero); + // Load ref and convert to 16b. + const __m128i ref0 = _mm_loadl_epi64((const __m128i*)&ref[0 * BPS]); + const __m128i ref1 = _mm_loadl_epi64((const __m128i*)&ref[1 * BPS]); + const __m128i ref2 = _mm_loadl_epi64((const __m128i*)&ref[2 * BPS]); + const __m128i ref3 = _mm_loadl_epi64((const __m128i*)&ref[3 * BPS]); + const __m128i ref_0 = _mm_unpacklo_epi8(ref0, zero); + const __m128i ref_1 = _mm_unpacklo_epi8(ref1, zero); + const __m128i ref_2 = _mm_unpacklo_epi8(ref2, zero); + const __m128i ref_3 = _mm_unpacklo_epi8(ref3, zero); + // Compute difference. -> 00 01 02 03 00 00 00 00 + const __m128i diff0 = _mm_sub_epi16(src_0, ref_0); + const __m128i diff1 = _mm_sub_epi16(src_1, ref_1); + const __m128i diff2 = _mm_sub_epi16(src_2, ref_2); + const __m128i diff3 = _mm_sub_epi16(src_3, ref_3); + + // Unpack and shuffle + // 00 01 02 03 0 0 0 0 + // 10 11 12 13 0 0 0 0 + // 20 21 22 23 0 0 0 0 + // 30 31 32 33 0 0 0 0 + const __m128i shuf01 = _mm_unpacklo_epi32(diff0, diff1); + const __m128i shuf23 = _mm_unpacklo_epi32(diff2, diff3); __m128i v01, v32; - // Difference between src and ref and initial transpose. - { - // Load src and convert to 16b. - const __m128i src0 = _mm_loadl_epi64((__m128i*)&src[0 * BPS]); - const __m128i src1 = _mm_loadl_epi64((__m128i*)&src[1 * BPS]); - const __m128i src2 = _mm_loadl_epi64((__m128i*)&src[2 * BPS]); - const __m128i src3 = _mm_loadl_epi64((__m128i*)&src[3 * BPS]); - const __m128i src_0 = _mm_unpacklo_epi8(src0, zero); - const __m128i src_1 = _mm_unpacklo_epi8(src1, zero); - const __m128i src_2 = _mm_unpacklo_epi8(src2, zero); - const __m128i src_3 = _mm_unpacklo_epi8(src3, zero); - // Load ref and convert to 16b. - const __m128i ref0 = _mm_loadl_epi64((__m128i*)&ref[0 * BPS]); - const __m128i ref1 = _mm_loadl_epi64((__m128i*)&ref[1 * BPS]); - const __m128i ref2 = _mm_loadl_epi64((__m128i*)&ref[2 * BPS]); - const __m128i ref3 = _mm_loadl_epi64((__m128i*)&ref[3 * BPS]); - const __m128i ref_0 = _mm_unpacklo_epi8(ref0, zero); - const __m128i ref_1 = _mm_unpacklo_epi8(ref1, zero); - const __m128i ref_2 = _mm_unpacklo_epi8(ref2, zero); - const __m128i ref_3 = _mm_unpacklo_epi8(ref3, zero); - // Compute difference. - const __m128i diff0 = _mm_sub_epi16(src_0, ref_0); - const __m128i diff1 = _mm_sub_epi16(src_1, ref_1); - const __m128i diff2 = _mm_sub_epi16(src_2, ref_2); - const __m128i diff3 = _mm_sub_epi16(src_3, ref_3); - - // Transpose. - // 00 01 02 03 0 0 0 0 - // 10 11 12 13 0 0 0 0 - // 20 21 22 23 0 0 0 0 - // 30 31 32 33 0 0 0 0 - const __m128i transpose0_0 = _mm_unpacklo_epi16(diff0, diff1); - const __m128i transpose0_1 = _mm_unpacklo_epi16(diff2, diff3); - // 00 10 01 11 02 12 03 13 - // 20 30 21 31 22 32 23 33 - const __m128i v23 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); - v01 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); - v32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); - // a02 a12 a22 a32 a03 a13 a23 a33 - // a00 a10 a20 a30 a01 a11 a21 a31 - // a03 a13 a23 a33 a02 a12 a22 a32 - } - - // First pass and subsequent transpose. - { - // Same operations are done on the (0,3) and (1,2) pairs. - // b0 = (a0 + a3) << 3 - // b1 = (a1 + a2) << 3 - // b3 = (a0 - a3) << 3 - // b2 = (a1 - a2) << 3 - const __m128i a01 = _mm_add_epi16(v01, v32); - const __m128i a32 = _mm_sub_epi16(v01, v32); - const __m128i b01 = _mm_slli_epi16(a01, 3); - const __m128i b32 = _mm_slli_epi16(a32, 3); - const __m128i b11 = _mm_unpackhi_epi64(b01, b01); - const __m128i b22 = _mm_unpackhi_epi64(b32, b32); - - // e0 = b0 + b1 - // e2 = b0 - b1 - const __m128i e0 = _mm_add_epi16(b01, b11); - const __m128i e2 = _mm_sub_epi16(b01, b11); - const __m128i e02 = _mm_unpacklo_epi64(e0, e2); - - // e1 = (b3 * 5352 + b2 * 2217 + 14500) >> 12 - // e3 = (b3 * 2217 - b2 * 5352 + 7500) >> 12 - const __m128i b23 = _mm_unpacklo_epi16(b22, b32); - const __m128i c1 = _mm_madd_epi16(b23, k5352_2217); - const __m128i c3 = _mm_madd_epi16(b23, k2217_5352); - const __m128i d1 = _mm_add_epi32(c1, k14500); - const __m128i d3 = _mm_add_epi32(c3, k7500); - const __m128i e1 = _mm_srai_epi32(d1, 12); - const __m128i e3 = _mm_srai_epi32(d3, 12); - const __m128i e13 = _mm_packs_epi32(e1, e3); - - // Transpose. - // 00 01 02 03 20 21 22 23 - // 10 11 12 13 30 31 32 33 - const __m128i transpose0_0 = _mm_unpacklo_epi16(e02, e13); - const __m128i transpose0_1 = _mm_unpackhi_epi16(e02, e13); - // 00 10 01 11 02 12 03 13 - // 20 30 21 31 22 32 23 33 - const __m128i v23 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); - v01 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); - v32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); - // 02 12 22 32 03 13 23 33 - // 00 10 20 30 01 11 21 31 - // 03 13 23 33 02 12 22 32 - } + // First pass + FTransformPass1(&shuf01, &shuf23, &v01, &v32); // Second pass + FTransformPass2(&v01, &v32, out); +} + +static void FTransform2(const uint8_t* src, const uint8_t* ref, int16_t* out) { + const __m128i zero = _mm_setzero_si128(); + + // Load src and convert to 16b. + const __m128i src0 = _mm_loadl_epi64((const __m128i*)&src[0 * BPS]); + const __m128i src1 = _mm_loadl_epi64((const __m128i*)&src[1 * BPS]); + const __m128i src2 = _mm_loadl_epi64((const __m128i*)&src[2 * BPS]); + const __m128i src3 = _mm_loadl_epi64((const __m128i*)&src[3 * BPS]); + const __m128i src_0 = _mm_unpacklo_epi8(src0, zero); + const __m128i src_1 = _mm_unpacklo_epi8(src1, zero); + const __m128i src_2 = _mm_unpacklo_epi8(src2, zero); + const __m128i src_3 = _mm_unpacklo_epi8(src3, zero); + // Load ref and convert to 16b. + const __m128i ref0 = _mm_loadl_epi64((const __m128i*)&ref[0 * BPS]); + const __m128i ref1 = _mm_loadl_epi64((const __m128i*)&ref[1 * BPS]); + const __m128i ref2 = _mm_loadl_epi64((const __m128i*)&ref[2 * BPS]); + const __m128i ref3 = _mm_loadl_epi64((const __m128i*)&ref[3 * BPS]); + const __m128i ref_0 = _mm_unpacklo_epi8(ref0, zero); + const __m128i ref_1 = _mm_unpacklo_epi8(ref1, zero); + const __m128i ref_2 = _mm_unpacklo_epi8(ref2, zero); + const __m128i ref_3 = _mm_unpacklo_epi8(ref3, zero); + // Compute difference. -> 00 01 02 03 00' 01' 02' 03' + const __m128i diff0 = _mm_sub_epi16(src_0, ref_0); + const __m128i diff1 = _mm_sub_epi16(src_1, ref_1); + const __m128i diff2 = _mm_sub_epi16(src_2, ref_2); + const __m128i diff3 = _mm_sub_epi16(src_3, ref_3); + + // Unpack and shuffle + // 00 01 02 03 0 0 0 0 + // 10 11 12 13 0 0 0 0 + // 20 21 22 23 0 0 0 0 + // 30 31 32 33 0 0 0 0 + const __m128i shuf01l = _mm_unpacklo_epi32(diff0, diff1); + const __m128i shuf23l = _mm_unpacklo_epi32(diff2, diff3); + const __m128i shuf01h = _mm_unpackhi_epi32(diff0, diff1); + const __m128i shuf23h = _mm_unpackhi_epi32(diff2, diff3); + __m128i v01l, v32l; + __m128i v01h, v32h; + + // First pass + FTransformPass1(&shuf01l, &shuf23l, &v01l, &v32l); + FTransformPass1(&shuf01h, &shuf23h, &v01h, &v32h); + + // Second pass + FTransformPass2(&v01l, &v32l, out + 0); + FTransformPass2(&v01h, &v32h, out + 16); +} + +static void FTransformWHTRow(const int16_t* const in, __m128i* const out) { + const __m128i kMult1 = _mm_set_epi16(0, 0, 0, 0, 1, 1, 1, 1); + const __m128i kMult2 = _mm_set_epi16(0, 0, 0, 0, -1, 1, -1, 1); + const __m128i src0 = _mm_loadl_epi64((__m128i*)&in[0 * 16]); + const __m128i src1 = _mm_loadl_epi64((__m128i*)&in[1 * 16]); + const __m128i src2 = _mm_loadl_epi64((__m128i*)&in[2 * 16]); + const __m128i src3 = _mm_loadl_epi64((__m128i*)&in[3 * 16]); + const __m128i A01 = _mm_unpacklo_epi16(src0, src1); // A0 A1 | ... + const __m128i A23 = _mm_unpacklo_epi16(src2, src3); // A2 A3 | ... + const __m128i B0 = _mm_adds_epi16(A01, A23); // a0 | a1 | ... + const __m128i B1 = _mm_subs_epi16(A01, A23); // a3 | a2 | ... + const __m128i C0 = _mm_unpacklo_epi32(B0, B1); // a0 | a1 | a3 | a2 + const __m128i C1 = _mm_unpacklo_epi32(B1, B0); // a3 | a2 | a0 | a1 + const __m128i D0 = _mm_madd_epi16(C0, kMult1); // out0, out1 + const __m128i D1 = _mm_madd_epi16(C1, kMult2); // out2, out3 + *out = _mm_unpacklo_epi64(D0, D1); +} + +static void FTransformWHT(const int16_t* in, int16_t* out) { + __m128i row0, row1, row2, row3; + FTransformWHTRow(in + 0 * 64, &row0); + FTransformWHTRow(in + 1 * 64, &row1); + FTransformWHTRow(in + 2 * 64, &row2); + FTransformWHTRow(in + 3 * 64, &row3); + { - // Same operations are done on the (0,3) and (1,2) pairs. - // a0 = v0 + v3 - // a1 = v1 + v2 - // a3 = v0 - v3 - // a2 = v1 - v2 - const __m128i a01 = _mm_add_epi16(v01, v32); - const __m128i a32 = _mm_sub_epi16(v01, v32); - const __m128i a11 = _mm_unpackhi_epi64(a01, a01); - const __m128i a22 = _mm_unpackhi_epi64(a32, a32); - - // d0 = (a0 + a1 + 7) >> 4; - // d2 = (a0 - a1 + 7) >> 4; - const __m128i b0 = _mm_add_epi16(a01, a11); - const __m128i b2 = _mm_sub_epi16(a01, a11); - const __m128i c0 = _mm_add_epi16(b0, seven); - const __m128i c2 = _mm_add_epi16(b2, seven); - const __m128i d0 = _mm_srai_epi16(c0, 4); - const __m128i d2 = _mm_srai_epi16(c2, 4); - - // f1 = ((b3 * 5352 + b2 * 2217 + 12000) >> 16) - // f3 = ((b3 * 2217 - b2 * 5352 + 51000) >> 16) - const __m128i b23 = _mm_unpacklo_epi16(a22, a32); - const __m128i c1 = _mm_madd_epi16(b23, k5352_2217); - const __m128i c3 = _mm_madd_epi16(b23, k2217_5352); - const __m128i d1 = _mm_add_epi32(c1, k12000_plus_one); - const __m128i d3 = _mm_add_epi32(c3, k51000); - const __m128i e1 = _mm_srai_epi32(d1, 16); - const __m128i e3 = _mm_srai_epi32(d3, 16); - const __m128i f1 = _mm_packs_epi32(e1, e1); - const __m128i f3 = _mm_packs_epi32(e3, e3); - // f1 = f1 + (a3 != 0); - // The compare will return (0xffff, 0) for (==0, !=0). To turn that into the - // desired (0, 1), we add one earlier through k12000_plus_one. - const __m128i g1 = _mm_add_epi16(f1, _mm_cmpeq_epi16(a32, zero)); - - _mm_storel_epi64((__m128i*)&out[ 0], d0); - _mm_storel_epi64((__m128i*)&out[ 4], g1); - _mm_storel_epi64((__m128i*)&out[ 8], d2); - _mm_storel_epi64((__m128i*)&out[12], f3); + const __m128i a0 = _mm_add_epi32(row0, row2); + const __m128i a1 = _mm_add_epi32(row1, row3); + const __m128i a2 = _mm_sub_epi32(row1, row3); + const __m128i a3 = _mm_sub_epi32(row0, row2); + const __m128i b0 = _mm_srai_epi32(_mm_add_epi32(a0, a1), 1); + const __m128i b1 = _mm_srai_epi32(_mm_add_epi32(a3, a2), 1); + const __m128i b2 = _mm_srai_epi32(_mm_sub_epi32(a3, a2), 1); + const __m128i b3 = _mm_srai_epi32(_mm_sub_epi32(a0, a1), 1); + const __m128i out0 = _mm_packs_epi32(b0, b1); + const __m128i out1 = _mm_packs_epi32(b2, b3); + _mm_storeu_si128((__m128i*)&out[0], out0); + _mm_storeu_si128((__m128i*)&out[8], out1); + } +} + +//------------------------------------------------------------------------------ +// Compute susceptibility based on DCT-coeff histograms: +// the higher, the "easier" the macroblock is to compress. + +static void CollectHistogram(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block, + VP8Histogram* const histo) { + const __m128i zero = _mm_setzero_si128(); + const __m128i max_coeff_thresh = _mm_set1_epi16(MAX_COEFF_THRESH); + int j; + int distribution[MAX_COEFF_THRESH + 1] = { 0 }; + for (j = start_block; j < end_block; ++j) { + int16_t out[16]; + int k; + + FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); + + // Convert coefficients to bin (within out[]). + { + // Load. + const __m128i out0 = _mm_loadu_si128((__m128i*)&out[0]); + const __m128i out1 = _mm_loadu_si128((__m128i*)&out[8]); + const __m128i d0 = _mm_sub_epi16(zero, out0); + const __m128i d1 = _mm_sub_epi16(zero, out1); + const __m128i abs0 = _mm_max_epi16(out0, d0); // abs(v), 16b + const __m128i abs1 = _mm_max_epi16(out1, d1); + // v = abs(out) >> 3 + const __m128i v0 = _mm_srai_epi16(abs0, 3); + const __m128i v1 = _mm_srai_epi16(abs1, 3); + // bin = min(v, MAX_COEFF_THRESH) + const __m128i bin0 = _mm_min_epi16(v0, max_coeff_thresh); + const __m128i bin1 = _mm_min_epi16(v1, max_coeff_thresh); + // Store. + _mm_storeu_si128((__m128i*)&out[0], bin0); + _mm_storeu_si128((__m128i*)&out[8], bin1); + } + + // Convert coefficients to bin. + for (k = 0; k < 16; ++k) { + ++distribution[out[k]]; + } } + VP8SetHistogramData(distribution, histo); +} + +//------------------------------------------------------------------------------ +// Intra predictions + +// helper for chroma-DC predictions +static WEBP_INLINE void Put8x8uv(uint8_t v, uint8_t* dst) { + int j; + const __m128i values = _mm_set1_epi8(v); + for (j = 0; j < 8; ++j) { + _mm_storel_epi64((__m128i*)(dst + j * BPS), values); + } +} + +static WEBP_INLINE void Put16(uint8_t v, uint8_t* dst) { + int j; + const __m128i values = _mm_set1_epi8(v); + for (j = 0; j < 16; ++j) { + _mm_store_si128((__m128i*)(dst + j * BPS), values); + } +} + +static WEBP_INLINE void Fill(uint8_t* dst, int value, int size) { + if (size == 4) { + int j; + for (j = 0; j < 4; ++j) { + memset(dst + j * BPS, value, 4); + } + } else if (size == 8) { + Put8x8uv(value, dst); + } else { + Put16(value, dst); + } +} + +static WEBP_INLINE void VE8uv(uint8_t* dst, const uint8_t* top) { + int j; + const __m128i top_values = _mm_loadl_epi64((const __m128i*)top); + for (j = 0; j < 8; ++j) { + _mm_storel_epi64((__m128i*)(dst + j * BPS), top_values); + } +} + +static WEBP_INLINE void VE16(uint8_t* dst, const uint8_t* top) { + const __m128i top_values = _mm_load_si128((const __m128i*)top); + int j; + for (j = 0; j < 16; ++j) { + _mm_store_si128((__m128i*)(dst + j * BPS), top_values); + } +} + +static WEBP_INLINE void VerticalPred(uint8_t* dst, + const uint8_t* top, int size) { + if (top != NULL) { + if (size == 8) { + VE8uv(dst, top); + } else { + VE16(dst, top); + } + } else { + Fill(dst, 127, size); + } +} + +static WEBP_INLINE void HE8uv(uint8_t* dst, const uint8_t* left) { + int j; + for (j = 0; j < 8; ++j) { + const __m128i values = _mm_set1_epi8(left[j]); + _mm_storel_epi64((__m128i*)dst, values); + dst += BPS; + } +} + +static WEBP_INLINE void HE16(uint8_t* dst, const uint8_t* left) { + int j; + for (j = 0; j < 16; ++j) { + const __m128i values = _mm_set1_epi8(left[j]); + _mm_store_si128((__m128i*)dst, values); + dst += BPS; + } +} + +static WEBP_INLINE void HorizontalPred(uint8_t* dst, + const uint8_t* left, int size) { + if (left != NULL) { + if (size == 8) { + HE8uv(dst, left); + } else { + HE16(dst, left); + } + } else { + Fill(dst, 129, size); + } +} + +static WEBP_INLINE void TM(uint8_t* dst, const uint8_t* left, + const uint8_t* top, int size) { + const __m128i zero = _mm_setzero_si128(); + int y; + if (size == 8) { + const __m128i top_values = _mm_loadl_epi64((const __m128i*)top); + const __m128i top_base = _mm_unpacklo_epi8(top_values, zero); + for (y = 0; y < 8; ++y, dst += BPS) { + const int val = left[y] - left[-1]; + const __m128i base = _mm_set1_epi16(val); + const __m128i out = _mm_packus_epi16(_mm_add_epi16(base, top_base), zero); + _mm_storel_epi64((__m128i*)dst, out); + } + } else { + const __m128i top_values = _mm_load_si128((const __m128i*)top); + const __m128i top_base_0 = _mm_unpacklo_epi8(top_values, zero); + const __m128i top_base_1 = _mm_unpackhi_epi8(top_values, zero); + for (y = 0; y < 16; ++y, dst += BPS) { + const int val = left[y] - left[-1]; + const __m128i base = _mm_set1_epi16(val); + const __m128i out_0 = _mm_add_epi16(base, top_base_0); + const __m128i out_1 = _mm_add_epi16(base, top_base_1); + const __m128i out = _mm_packus_epi16(out_0, out_1); + _mm_store_si128((__m128i*)dst, out); + } + } +} + +static WEBP_INLINE void TrueMotion(uint8_t* dst, const uint8_t* left, + const uint8_t* top, int size) { + if (left != NULL) { + if (top != NULL) { + TM(dst, left, top, size); + } else { + HorizontalPred(dst, left, size); + } + } else { + // true motion without left samples (hence: with default 129 value) + // is equivalent to VE prediction where you just copy the top samples. + // Note that if top samples are not available, the default value is + // then 129, and not 127 as in the VerticalPred case. + if (top != NULL) { + VerticalPred(dst, top, size); + } else { + Fill(dst, 129, size); + } + } +} + +static WEBP_INLINE void DC8uv(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + const __m128i zero = _mm_setzero_si128(); + const __m128i top_values = _mm_loadl_epi64((const __m128i*)top); + const __m128i left_values = _mm_loadl_epi64((const __m128i*)left); + const __m128i sum_top = _mm_sad_epu8(top_values, zero); + const __m128i sum_left = _mm_sad_epu8(left_values, zero); + const int DC = _mm_cvtsi128_si32(sum_top) + _mm_cvtsi128_si32(sum_left) + 8; + Put8x8uv(DC >> 4, dst); +} + +static WEBP_INLINE void DC8uvNoLeft(uint8_t* dst, const uint8_t* top) { + const __m128i zero = _mm_setzero_si128(); + const __m128i top_values = _mm_loadl_epi64((const __m128i*)top); + const __m128i sum = _mm_sad_epu8(top_values, zero); + const int DC = _mm_cvtsi128_si32(sum) + 4; + Put8x8uv(DC >> 3, dst); +} + +static WEBP_INLINE void DC8uvNoTop(uint8_t* dst, const uint8_t* left) { + // 'left' is contiguous so we can reuse the top summation. + DC8uvNoLeft(dst, left); +} + +static WEBP_INLINE void DC8uvNoTopLeft(uint8_t* dst) { + Put8x8uv(0x80, dst); +} + +static WEBP_INLINE void DC8uvMode(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + if (top != NULL) { + if (left != NULL) { // top and left present + DC8uv(dst, left, top); + } else { // top, but no left + DC8uvNoLeft(dst, top); + } + } else if (left != NULL) { // left but no top + DC8uvNoTop(dst, left); + } else { // no top, no left, nothing. + DC8uvNoTopLeft(dst); + } +} + +static WEBP_INLINE void DC16(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + const __m128i zero = _mm_setzero_si128(); + const __m128i top_row = _mm_load_si128((const __m128i*)top); + const __m128i left_row = _mm_load_si128((const __m128i*)left); + const __m128i sad8x2 = _mm_sad_epu8(top_row, zero); + // sum the two sads: sad8x2[0:1] + sad8x2[8:9] + const __m128i sum_top = _mm_add_epi16(sad8x2, _mm_shuffle_epi32(sad8x2, 2)); + const __m128i sad8x2_left = _mm_sad_epu8(left_row, zero); + // sum the two sads: sad8x2[0:1] + sad8x2[8:9] + const __m128i sum_left = + _mm_add_epi16(sad8x2_left, _mm_shuffle_epi32(sad8x2_left, 2)); + const int DC = _mm_cvtsi128_si32(sum_top) + _mm_cvtsi128_si32(sum_left) + 16; + Put16(DC >> 5, dst); +} + +static WEBP_INLINE void DC16NoLeft(uint8_t* dst, const uint8_t* top) { + const __m128i zero = _mm_setzero_si128(); + const __m128i top_row = _mm_load_si128((const __m128i*)top); + const __m128i sad8x2 = _mm_sad_epu8(top_row, zero); + // sum the two sads: sad8x2[0:1] + sad8x2[8:9] + const __m128i sum = _mm_add_epi16(sad8x2, _mm_shuffle_epi32(sad8x2, 2)); + const int DC = _mm_cvtsi128_si32(sum) + 8; + Put16(DC >> 4, dst); +} + +static WEBP_INLINE void DC16NoTop(uint8_t* dst, const uint8_t* left) { + // 'left' is contiguous so we can reuse the top summation. + DC16NoLeft(dst, left); +} + +static WEBP_INLINE void DC16NoTopLeft(uint8_t* dst) { + Put16(0x80, dst); +} + +static WEBP_INLINE void DC16Mode(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + if (top != NULL) { + if (left != NULL) { // top and left present + DC16(dst, left, top); + } else { // top, but no left + DC16NoLeft(dst, top); + } + } else if (left != NULL) { // left but no top + DC16NoTop(dst, left); + } else { // no top, no left, nothing. + DC16NoTopLeft(dst); + } +} + +//------------------------------------------------------------------------------ +// 4x4 predictions + +#define DST(x, y) dst[(x) + (y) * BPS] +#define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2) +#define AVG2(a, b) (((a) + (b) + 1) >> 1) + +// We use the following 8b-arithmetic tricks: +// (a + 2 * b + c + 2) >> 2 = (AC + b + 1) >> 1 +// where: AC = (a + c) >> 1 = [(a + c + 1) >> 1] - [(a^c) & 1] +// and: +// (a + 2 * b + c + 2) >> 2 = (AB + BC + 1) >> 1 - (ab|bc)&lsb +// where: AC = (a + b + 1) >> 1, BC = (b + c + 1) >> 1 +// and ab = a ^ b, bc = b ^ c, lsb = (AC^BC)&1 + +static WEBP_INLINE void VE4(uint8_t* dst, const uint8_t* top) { // vertical + const __m128i one = _mm_set1_epi8(1); + const __m128i ABCDEFGH = _mm_loadl_epi64((__m128i*)(top - 1)); + const __m128i BCDEFGH0 = _mm_srli_si128(ABCDEFGH, 1); + const __m128i CDEFGH00 = _mm_srli_si128(ABCDEFGH, 2); + const __m128i a = _mm_avg_epu8(ABCDEFGH, CDEFGH00); + const __m128i lsb = _mm_and_si128(_mm_xor_si128(ABCDEFGH, CDEFGH00), one); + const __m128i b = _mm_subs_epu8(a, lsb); + const __m128i avg = _mm_avg_epu8(b, BCDEFGH0); + const uint32_t vals = _mm_cvtsi128_si32(avg); + int i; + for (i = 0; i < 4; ++i) { + *(uint32_t*)(dst + i * BPS) = vals; + } +} + +static WEBP_INLINE void HE4(uint8_t* dst, const uint8_t* top) { // horizontal + const int X = top[-1]; + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int L = top[-5]; + *(uint32_t*)(dst + 0 * BPS) = 0x01010101U * AVG3(X, I, J); + *(uint32_t*)(dst + 1 * BPS) = 0x01010101U * AVG3(I, J, K); + *(uint32_t*)(dst + 2 * BPS) = 0x01010101U * AVG3(J, K, L); + *(uint32_t*)(dst + 3 * BPS) = 0x01010101U * AVG3(K, L, L); +} + +static WEBP_INLINE void DC4(uint8_t* dst, const uint8_t* top) { + uint32_t dc = 4; + int i; + for (i = 0; i < 4; ++i) dc += top[i] + top[-5 + i]; + Fill(dst, dc >> 3, 4); +} + +static WEBP_INLINE void LD4(uint8_t* dst, const uint8_t* top) { // Down-Left + const __m128i one = _mm_set1_epi8(1); + const __m128i ABCDEFGH = _mm_loadl_epi64((const __m128i*)top); + const __m128i BCDEFGH0 = _mm_srli_si128(ABCDEFGH, 1); + const __m128i CDEFGH00 = _mm_srli_si128(ABCDEFGH, 2); + const __m128i CDEFGHH0 = _mm_insert_epi16(CDEFGH00, top[7], 3); + const __m128i avg1 = _mm_avg_epu8(ABCDEFGH, CDEFGHH0); + const __m128i lsb = _mm_and_si128(_mm_xor_si128(ABCDEFGH, CDEFGHH0), one); + const __m128i avg2 = _mm_subs_epu8(avg1, lsb); + const __m128i abcdefg = _mm_avg_epu8(avg2, BCDEFGH0); + *(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( abcdefg ); + *(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1)); + *(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2)); + *(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 3)); +} + +static WEBP_INLINE void VR4(uint8_t* dst, + const uint8_t* top) { // Vertical-Right + const __m128i one = _mm_set1_epi8(1); + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int X = top[-1]; + const __m128i XABCD = _mm_loadl_epi64((const __m128i*)(top - 1)); + const __m128i ABCD0 = _mm_srli_si128(XABCD, 1); + const __m128i abcd = _mm_avg_epu8(XABCD, ABCD0); + const __m128i _XABCD = _mm_slli_si128(XABCD, 1); + const __m128i IXABCD = _mm_insert_epi16(_XABCD, I | (X << 8), 0); + const __m128i avg1 = _mm_avg_epu8(IXABCD, ABCD0); + const __m128i lsb = _mm_and_si128(_mm_xor_si128(IXABCD, ABCD0), one); + const __m128i avg2 = _mm_subs_epu8(avg1, lsb); + const __m128i efgh = _mm_avg_epu8(avg2, XABCD); + *(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( abcd ); + *(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32( efgh ); + *(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_slli_si128(abcd, 1)); + *(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_slli_si128(efgh, 1)); + + // these two are hard to implement in SSE2, so we keep the C-version: + DST(0, 2) = AVG3(J, I, X); + DST(0, 3) = AVG3(K, J, I); +} + +static WEBP_INLINE void VL4(uint8_t* dst, + const uint8_t* top) { // Vertical-Left + const __m128i one = _mm_set1_epi8(1); + const __m128i ABCDEFGH = _mm_loadl_epi64((const __m128i*)top); + const __m128i BCDEFGH_ = _mm_srli_si128(ABCDEFGH, 1); + const __m128i CDEFGH__ = _mm_srli_si128(ABCDEFGH, 2); + const __m128i avg1 = _mm_avg_epu8(ABCDEFGH, BCDEFGH_); + const __m128i avg2 = _mm_avg_epu8(CDEFGH__, BCDEFGH_); + const __m128i avg3 = _mm_avg_epu8(avg1, avg2); + const __m128i lsb1 = _mm_and_si128(_mm_xor_si128(avg1, avg2), one); + const __m128i ab = _mm_xor_si128(ABCDEFGH, BCDEFGH_); + const __m128i bc = _mm_xor_si128(CDEFGH__, BCDEFGH_); + const __m128i abbc = _mm_or_si128(ab, bc); + const __m128i lsb2 = _mm_and_si128(abbc, lsb1); + const __m128i avg4 = _mm_subs_epu8(avg3, lsb2); + const uint32_t extra_out = _mm_cvtsi128_si32(_mm_srli_si128(avg4, 4)); + *(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32( avg1 ); + *(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32( avg4 ); + *(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(avg1, 1)); + *(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(avg4, 1)); + + // these two are hard to get and irregular + DST(3, 2) = (extra_out >> 0) & 0xff; + DST(3, 3) = (extra_out >> 8) & 0xff; +} + +static WEBP_INLINE void RD4(uint8_t* dst, const uint8_t* top) { // Down-right + const __m128i one = _mm_set1_epi8(1); + const __m128i LKJIXABC = _mm_loadl_epi64((const __m128i*)(top - 5)); + const __m128i LKJIXABCD = _mm_insert_epi16(LKJIXABC, top[3], 4); + const __m128i KJIXABCD_ = _mm_srli_si128(LKJIXABCD, 1); + const __m128i JIXABCD__ = _mm_srli_si128(LKJIXABCD, 2); + const __m128i avg1 = _mm_avg_epu8(JIXABCD__, LKJIXABCD); + const __m128i lsb = _mm_and_si128(_mm_xor_si128(JIXABCD__, LKJIXABCD), one); + const __m128i avg2 = _mm_subs_epu8(avg1, lsb); + const __m128i abcdefg = _mm_avg_epu8(avg2, KJIXABCD_); + *(uint32_t*)(dst + 3 * BPS) = _mm_cvtsi128_si32( abcdefg ); + *(uint32_t*)(dst + 2 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1)); + *(uint32_t*)(dst + 1 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2)); + *(uint32_t*)(dst + 0 * BPS) = _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 3)); +} + +static WEBP_INLINE void HU4(uint8_t* dst, const uint8_t* top) { + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int L = top[-5]; + DST(0, 0) = AVG2(I, J); + DST(2, 0) = DST(0, 1) = AVG2(J, K); + DST(2, 1) = DST(0, 2) = AVG2(K, L); + DST(1, 0) = AVG3(I, J, K); + DST(3, 0) = DST(1, 1) = AVG3(J, K, L); + DST(3, 1) = DST(1, 2) = AVG3(K, L, L); + DST(3, 2) = DST(2, 2) = + DST(0, 3) = DST(1, 3) = DST(2, 3) = DST(3, 3) = L; +} + +static WEBP_INLINE void HD4(uint8_t* dst, const uint8_t* top) { + const int X = top[-1]; + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int L = top[-5]; + const int A = top[0]; + const int B = top[1]; + const int C = top[2]; + + DST(0, 0) = DST(2, 1) = AVG2(I, X); + DST(0, 1) = DST(2, 2) = AVG2(J, I); + DST(0, 2) = DST(2, 3) = AVG2(K, J); + DST(0, 3) = AVG2(L, K); + + DST(3, 0) = AVG3(A, B, C); + DST(2, 0) = AVG3(X, A, B); + DST(1, 0) = DST(3, 1) = AVG3(I, X, A); + DST(1, 1) = DST(3, 2) = AVG3(J, I, X); + DST(1, 2) = DST(3, 3) = AVG3(K, J, I); + DST(1, 3) = AVG3(L, K, J); +} + +static WEBP_INLINE void TM4(uint8_t* dst, const uint8_t* top) { + const __m128i zero = _mm_setzero_si128(); + const __m128i top_values = _mm_cvtsi32_si128(MemToUint32(top)); + const __m128i top_base = _mm_unpacklo_epi8(top_values, zero); + int y; + for (y = 0; y < 4; ++y, dst += BPS) { + const int val = top[-2 - y] - top[-1]; + const __m128i base = _mm_set1_epi16(val); + const __m128i out = _mm_packus_epi16(_mm_add_epi16(base, top_base), zero); + *(int*)dst = _mm_cvtsi128_si32(out); + } +} + +#undef DST +#undef AVG3 +#undef AVG2 + +//------------------------------------------------------------------------------ +// luma 4x4 prediction + +// Left samples are top[-5 .. -2], top_left is top[-1], top are +// located at top[0..3], and top right is top[4..7] +static void Intra4Preds(uint8_t* dst, const uint8_t* top) { + DC4(I4DC4 + dst, top); + TM4(I4TM4 + dst, top); + VE4(I4VE4 + dst, top); + HE4(I4HE4 + dst, top); + RD4(I4RD4 + dst, top); + VR4(I4VR4 + dst, top); + LD4(I4LD4 + dst, top); + VL4(I4VL4 + dst, top); + HD4(I4HD4 + dst, top); + HU4(I4HU4 + dst, top); +} + +//------------------------------------------------------------------------------ +// Chroma 8x8 prediction (paragraph 12.2) + +static void IntraChromaPreds(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + // U block + DC8uvMode(C8DC8 + dst, left, top); + VerticalPred(C8VE8 + dst, top, 8); + HorizontalPred(C8HE8 + dst, left, 8); + TrueMotion(C8TM8 + dst, left, top, 8); + // V block + dst += 8; + if (top != NULL) top += 8; + if (left != NULL) left += 16; + DC8uvMode(C8DC8 + dst, left, top); + VerticalPred(C8VE8 + dst, top, 8); + HorizontalPred(C8HE8 + dst, left, 8); + TrueMotion(C8TM8 + dst, left, top, 8); +} + +//------------------------------------------------------------------------------ +// luma 16x16 prediction (paragraph 12.3) + +static void Intra16Preds(uint8_t* dst, + const uint8_t* left, const uint8_t* top) { + DC16Mode(I16DC16 + dst, left, top); + VerticalPred(I16VE16 + dst, top, 16); + HorizontalPred(I16HE16 + dst, left, 16); + TrueMotion(I16TM16 + dst, left, top, 16); } //------------------------------------------------------------------------------ // Metric -static int SSE4x4SSE2(const uint8_t* a, const uint8_t* b) { - const __m128i zero = _mm_set1_epi16(0); +static WEBP_INLINE void SubtractAndAccumulate(const __m128i a, const __m128i b, + __m128i* const sum) { + // take abs(a-b) in 8b + const __m128i a_b = _mm_subs_epu8(a, b); + const __m128i b_a = _mm_subs_epu8(b, a); + const __m128i abs_a_b = _mm_or_si128(a_b, b_a); + // zero-extend to 16b + const __m128i zero = _mm_setzero_si128(); + const __m128i C0 = _mm_unpacklo_epi8(abs_a_b, zero); + const __m128i C1 = _mm_unpackhi_epi8(abs_a_b, zero); + // multiply with self + const __m128i sum1 = _mm_madd_epi16(C0, C0); + const __m128i sum2 = _mm_madd_epi16(C1, C1); + *sum = _mm_add_epi32(sum1, sum2); +} - // Load values. - const __m128i a0 = _mm_loadl_epi64((__m128i*)&a[BPS * 0]); - const __m128i a1 = _mm_loadl_epi64((__m128i*)&a[BPS * 1]); - const __m128i a2 = _mm_loadl_epi64((__m128i*)&a[BPS * 2]); - const __m128i a3 = _mm_loadl_epi64((__m128i*)&a[BPS * 3]); - const __m128i b0 = _mm_loadl_epi64((__m128i*)&b[BPS * 0]); - const __m128i b1 = _mm_loadl_epi64((__m128i*)&b[BPS * 1]); - const __m128i b2 = _mm_loadl_epi64((__m128i*)&b[BPS * 2]); - const __m128i b3 = _mm_loadl_epi64((__m128i*)&b[BPS * 3]); +static WEBP_INLINE int SSE_16xN(const uint8_t* a, const uint8_t* b, + int num_pairs) { + __m128i sum = _mm_setzero_si128(); + int32_t tmp[4]; + int i; + + for (i = 0; i < num_pairs; ++i) { + const __m128i a0 = _mm_loadu_si128((const __m128i*)&a[BPS * 0]); + const __m128i b0 = _mm_loadu_si128((const __m128i*)&b[BPS * 0]); + const __m128i a1 = _mm_loadu_si128((const __m128i*)&a[BPS * 1]); + const __m128i b1 = _mm_loadu_si128((const __m128i*)&b[BPS * 1]); + __m128i sum1, sum2; + SubtractAndAccumulate(a0, b0, &sum1); + SubtractAndAccumulate(a1, b1, &sum2); + sum = _mm_add_epi32(sum, _mm_add_epi32(sum1, sum2)); + a += 2 * BPS; + b += 2 * BPS; + } + _mm_storeu_si128((__m128i*)tmp, sum); + return (tmp[3] + tmp[2] + tmp[1] + tmp[0]); +} + +static int SSE16x16(const uint8_t* a, const uint8_t* b) { + return SSE_16xN(a, b, 8); +} - // Combine pair of lines and convert to 16b. +static int SSE16x8(const uint8_t* a, const uint8_t* b) { + return SSE_16xN(a, b, 4); +} + +#define LOAD_8x16b(ptr) \ + _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i*)(ptr)), zero) + +static int SSE8x8(const uint8_t* a, const uint8_t* b) { + const __m128i zero = _mm_setzero_si128(); + int num_pairs = 4; + __m128i sum = zero; + int32_t tmp[4]; + while (num_pairs-- > 0) { + const __m128i a0 = LOAD_8x16b(&a[BPS * 0]); + const __m128i a1 = LOAD_8x16b(&a[BPS * 1]); + const __m128i b0 = LOAD_8x16b(&b[BPS * 0]); + const __m128i b1 = LOAD_8x16b(&b[BPS * 1]); + // subtract + const __m128i c0 = _mm_subs_epi16(a0, b0); + const __m128i c1 = _mm_subs_epi16(a1, b1); + // multiply/accumulate with self + const __m128i d0 = _mm_madd_epi16(c0, c0); + const __m128i d1 = _mm_madd_epi16(c1, c1); + // collect + const __m128i sum01 = _mm_add_epi32(d0, d1); + sum = _mm_add_epi32(sum, sum01); + a += 2 * BPS; + b += 2 * BPS; + } + _mm_storeu_si128((__m128i*)tmp, sum); + return (tmp[3] + tmp[2] + tmp[1] + tmp[0]); +} +#undef LOAD_8x16b + +static int SSE4x4(const uint8_t* a, const uint8_t* b) { + const __m128i zero = _mm_setzero_si128(); + + // Load values. Note that we read 8 pixels instead of 4, + // but the a/b buffers are over-allocated to that effect. + const __m128i a0 = _mm_loadl_epi64((const __m128i*)&a[BPS * 0]); + const __m128i a1 = _mm_loadl_epi64((const __m128i*)&a[BPS * 1]); + const __m128i a2 = _mm_loadl_epi64((const __m128i*)&a[BPS * 2]); + const __m128i a3 = _mm_loadl_epi64((const __m128i*)&a[BPS * 3]); + const __m128i b0 = _mm_loadl_epi64((const __m128i*)&b[BPS * 0]); + const __m128i b1 = _mm_loadl_epi64((const __m128i*)&b[BPS * 1]); + const __m128i b2 = _mm_loadl_epi64((const __m128i*)&b[BPS * 2]); + const __m128i b3 = _mm_loadl_epi64((const __m128i*)&b[BPS * 3]); + // Combine pair of lines. const __m128i a01 = _mm_unpacklo_epi32(a0, a1); const __m128i a23 = _mm_unpacklo_epi32(a2, a3); const __m128i b01 = _mm_unpacklo_epi32(b0, b1); const __m128i b23 = _mm_unpacklo_epi32(b2, b3); + // Convert to 16b. const __m128i a01s = _mm_unpacklo_epi8(a01, zero); const __m128i a23s = _mm_unpacklo_epi8(a23, zero); const __m128i b01s = _mm_unpacklo_epi8(b01, zero); const __m128i b23s = _mm_unpacklo_epi8(b23, zero); + // subtract, square and accumulate + const __m128i d0 = _mm_subs_epi16(a01s, b01s); + const __m128i d1 = _mm_subs_epi16(a23s, b23s); + const __m128i e0 = _mm_madd_epi16(d0, d0); + const __m128i e1 = _mm_madd_epi16(d1, d1); + const __m128i sum = _mm_add_epi32(e0, e1); - // Compute differences; (a-b)^2 = (abs(a-b))^2 = (sat8(a-b) + sat8(b-a))^2 - // TODO(cduvivier): Dissassemble and figure out why this is fastest. We don't - // need absolute values, there is no need to do calculation - // in 8bit as we are already in 16bit, ... Yet this is what - // benchmarks the fastest! - const __m128i d0 = _mm_subs_epu8(a01s, b01s); - const __m128i d1 = _mm_subs_epu8(b01s, a01s); - const __m128i d2 = _mm_subs_epu8(a23s, b23s); - const __m128i d3 = _mm_subs_epu8(b23s, a23s); - - // Square and add them all together. - const __m128i madd0 = _mm_madd_epi16(d0, d0); - const __m128i madd1 = _mm_madd_epi16(d1, d1); - const __m128i madd2 = _mm_madd_epi16(d2, d2); - const __m128i madd3 = _mm_madd_epi16(d3, d3); - const __m128i sum0 = _mm_add_epi32(madd0, madd1); - const __m128i sum1 = _mm_add_epi32(madd2, madd3); - const __m128i sum2 = _mm_add_epi32(sum0, sum1); int32_t tmp[4]; - _mm_storeu_si128((__m128i*)tmp, sum2); + _mm_storeu_si128((__m128i*)tmp, sum); return (tmp[3] + tmp[2] + tmp[1] + tmp[0]); } @@ -497,24 +1155,22 @@ static int SSE4x4SSE2(const uint8_t* a, const uint8_t* b) { // Hadamard transform // Returns the difference between the weighted sum of the absolute value of // transformed coefficients. -static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, - const uint16_t* const w) { +static int TTransform(const uint8_t* inA, const uint8_t* inB, + const uint16_t* const w) { int32_t sum[4]; __m128i tmp_0, tmp_1, tmp_2, tmp_3; const __m128i zero = _mm_setzero_si128(); - const __m128i one = _mm_set1_epi16(1); - const __m128i three = _mm_set1_epi16(3); - // Load, combine and tranpose inputs. + // Load, combine and transpose inputs. { - const __m128i inA_0 = _mm_loadl_epi64((__m128i*)&inA[BPS * 0]); - const __m128i inA_1 = _mm_loadl_epi64((__m128i*)&inA[BPS * 1]); - const __m128i inA_2 = _mm_loadl_epi64((__m128i*)&inA[BPS * 2]); - const __m128i inA_3 = _mm_loadl_epi64((__m128i*)&inA[BPS * 3]); - const __m128i inB_0 = _mm_loadl_epi64((__m128i*)&inB[BPS * 0]); - const __m128i inB_1 = _mm_loadl_epi64((__m128i*)&inB[BPS * 1]); - const __m128i inB_2 = _mm_loadl_epi64((__m128i*)&inB[BPS * 2]); - const __m128i inB_3 = _mm_loadl_epi64((__m128i*)&inB[BPS * 3]); + const __m128i inA_0 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 0]); + const __m128i inA_1 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 1]); + const __m128i inA_2 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 2]); + const __m128i inA_3 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 3]); + const __m128i inB_0 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 0]); + const __m128i inB_1 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 1]); + const __m128i inB_2 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 2]); + const __m128i inB_3 = _mm_loadl_epi64((const __m128i*)&inB[BPS * 3]); // Combine inA and inB (we'll do two transforms in parallel). const __m128i inAB_0 = _mm_unpacklo_epi8(inA_0, inB_0); @@ -550,17 +1206,14 @@ static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, // Horizontal pass and subsequent transpose. { // Calculate a and b (two 4x4 at once). - const __m128i a0 = _mm_slli_epi16(_mm_add_epi16(tmp_0, tmp_2), 2); - const __m128i a1 = _mm_slli_epi16(_mm_add_epi16(tmp_1, tmp_3), 2); - const __m128i a2 = _mm_slli_epi16(_mm_sub_epi16(tmp_1, tmp_3), 2); - const __m128i a3 = _mm_slli_epi16(_mm_sub_epi16(tmp_0, tmp_2), 2); - // b0_extra = (a0 != 0); - const __m128i b0_extra = _mm_andnot_si128(_mm_cmpeq_epi16 (a0, zero), one); - const __m128i b0_base = _mm_add_epi16(a0, a1); + const __m128i a0 = _mm_add_epi16(tmp_0, tmp_2); + const __m128i a1 = _mm_add_epi16(tmp_1, tmp_3); + const __m128i a2 = _mm_sub_epi16(tmp_1, tmp_3); + const __m128i a3 = _mm_sub_epi16(tmp_0, tmp_2); + const __m128i b0 = _mm_add_epi16(a0, a1); const __m128i b1 = _mm_add_epi16(a3, a2); const __m128i b2 = _mm_sub_epi16(a3, a2); const __m128i b3 = _mm_sub_epi16(a0, a1); - const __m128i b0 = _mm_add_epi16(b0_base, b0_extra); // a00 a01 a02 a03 b00 b01 b02 b03 // a10 a11 a12 a13 b10 b11 b12 b13 // a20 a21 a22 a23 b20 b21 b22 b23 @@ -598,8 +1251,8 @@ static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, // Load all inputs. // TODO(cduvivier): Make variable declarations and allocations aligned so // we can use _mm_load_si128 instead of _mm_loadu_si128. - const __m128i w_0 = _mm_loadu_si128((__m128i*)&w[0]); - const __m128i w_8 = _mm_loadu_si128((__m128i*)&w[8]); + const __m128i w_0 = _mm_loadu_si128((const __m128i*)&w[0]); + const __m128i w_8 = _mm_loadu_si128((const __m128i*)&w[8]); // Calculate a and b (two 4x4 at once). const __m128i a0 = _mm_add_epi16(tmp_0, tmp_2); @@ -618,36 +1271,16 @@ static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, __m128i B_b2 = _mm_unpackhi_epi64(b2, b3); { - // sign(b) = b >> 15 (0x0000 if positive, 0xffff if negative) - const __m128i sign_A_b0 = _mm_srai_epi16(A_b0, 15); - const __m128i sign_A_b2 = _mm_srai_epi16(A_b2, 15); - const __m128i sign_B_b0 = _mm_srai_epi16(B_b0, 15); - const __m128i sign_B_b2 = _mm_srai_epi16(B_b2, 15); - - // b = abs(b) = (b ^ sign) - sign - A_b0 = _mm_xor_si128(A_b0, sign_A_b0); - A_b2 = _mm_xor_si128(A_b2, sign_A_b2); - B_b0 = _mm_xor_si128(B_b0, sign_B_b0); - B_b2 = _mm_xor_si128(B_b2, sign_B_b2); - A_b0 = _mm_sub_epi16(A_b0, sign_A_b0); - A_b2 = _mm_sub_epi16(A_b2, sign_A_b2); - B_b0 = _mm_sub_epi16(B_b0, sign_B_b0); - B_b2 = _mm_sub_epi16(B_b2, sign_B_b2); + const __m128i d0 = _mm_sub_epi16(zero, A_b0); + const __m128i d1 = _mm_sub_epi16(zero, A_b2); + const __m128i d2 = _mm_sub_epi16(zero, B_b0); + const __m128i d3 = _mm_sub_epi16(zero, B_b2); + A_b0 = _mm_max_epi16(A_b0, d0); // abs(v), 16b + A_b2 = _mm_max_epi16(A_b2, d1); + B_b0 = _mm_max_epi16(B_b0, d2); + B_b2 = _mm_max_epi16(B_b2, d3); } - // b = abs(b) + 3 - A_b0 = _mm_add_epi16(A_b0, three); - A_b2 = _mm_add_epi16(A_b2, three); - B_b0 = _mm_add_epi16(B_b0, three); - B_b2 = _mm_add_epi16(B_b2, three); - - // abs((b + (b<0) + 3) >> 3) = (abs(b) + 3) >> 3 - // b = (abs(b) + 3) >> 3 - A_b0 = _mm_srai_epi16(A_b0, 3); - A_b2 = _mm_srai_epi16(A_b2, 3); - B_b0 = _mm_srai_epi16(B_b0, 3); - B_b2 = _mm_srai_epi16(B_b2, 3); - // weighted sums A_b0 = _mm_madd_epi16(A_b0, w_0); A_b2 = _mm_madd_epi16(A_b2, w_8); @@ -663,35 +1296,33 @@ static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, return sum[0] + sum[1] + sum[2] + sum[3]; } -static int Disto4x4SSE2(const uint8_t* const a, const uint8_t* const b, - const uint16_t* const w) { - const int diff_sum = TTransformSSE2(a, b, w); - return (abs(diff_sum) + 8) >> 4; +static int Disto4x4(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + const int diff_sum = TTransform(a, b, w); + return abs(diff_sum) >> 5; } -static int Disto16x16SSE2(const uint8_t* const a, const uint8_t* const b, - const uint16_t* const w) { +static int Disto16x16(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { int D = 0; int x, y; for (y = 0; y < 16 * BPS; y += 4 * BPS) { for (x = 0; x < 16; x += 4) { - D += Disto4x4SSE2(a + x + y, b + x + y, w); + D += Disto4x4(a + x + y, b + x + y, w); } } return D; } - //------------------------------------------------------------------------------ // Quantization // -// Simple quantization -static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], - int n, const VP8Matrix* const mtx) { - const __m128i max_coeff_2047 = _mm_set1_epi16(2047); - const __m128i zero = _mm_set1_epi16(0); - __m128i sign0, sign8; +static WEBP_INLINE int DoQuantizeBlock(int16_t in[16], int16_t out[16], + const uint16_t* const sharpen, + const VP8Matrix* const mtx) { + const __m128i max_coeff_2047 = _mm_set1_epi16(MAX_LEVEL); + const __m128i zero = _mm_setzero_si128(); __m128i coeff0, coeff8; __m128i out0, out8; __m128i packed_out; @@ -701,20 +1332,14 @@ static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], // we can use _mm_load_si128 instead of _mm_loadu_si128. __m128i in0 = _mm_loadu_si128((__m128i*)&in[0]); __m128i in8 = _mm_loadu_si128((__m128i*)&in[8]); - const __m128i sharpen0 = _mm_loadu_si128((__m128i*)&mtx->sharpen_[0]); - const __m128i sharpen8 = _mm_loadu_si128((__m128i*)&mtx->sharpen_[8]); - const __m128i iq0 = _mm_loadu_si128((__m128i*)&mtx->iq_[0]); - const __m128i iq8 = _mm_loadu_si128((__m128i*)&mtx->iq_[8]); - const __m128i bias0 = _mm_loadu_si128((__m128i*)&mtx->bias_[0]); - const __m128i bias8 = _mm_loadu_si128((__m128i*)&mtx->bias_[8]); - const __m128i q0 = _mm_loadu_si128((__m128i*)&mtx->q_[0]); - const __m128i q8 = _mm_loadu_si128((__m128i*)&mtx->q_[8]); - const __m128i zthresh0 = _mm_loadu_si128((__m128i*)&mtx->zthresh_[0]); - const __m128i zthresh8 = _mm_loadu_si128((__m128i*)&mtx->zthresh_[8]); - - // sign(in) = in >> 15 (0x0000 if positive, 0xffff if negative) - sign0 = _mm_srai_epi16(in0, 15); - sign8 = _mm_srai_epi16(in8, 15); + const __m128i iq0 = _mm_loadu_si128((const __m128i*)&mtx->iq_[0]); + const __m128i iq8 = _mm_loadu_si128((const __m128i*)&mtx->iq_[8]); + const __m128i q0 = _mm_loadu_si128((const __m128i*)&mtx->q_[0]); + const __m128i q8 = _mm_loadu_si128((const __m128i*)&mtx->q_[8]); + + // extract sign(in) (0x0000 if positive, 0xffff if negative) + const __m128i sign0 = _mm_cmpgt_epi16(zero, in0); + const __m128i sign8 = _mm_cmpgt_epi16(zero, in8); // coeff = abs(in) = (in ^ sign) - sign coeff0 = _mm_xor_si128(in0, sign0); @@ -723,43 +1348,47 @@ static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], coeff8 = _mm_sub_epi16(coeff8, sign8); // coeff = abs(in) + sharpen - coeff0 = _mm_add_epi16(coeff0, sharpen0); - coeff8 = _mm_add_epi16(coeff8, sharpen8); - - // if (coeff > 2047) coeff = 2047 - coeff0 = _mm_min_epi16(coeff0, max_coeff_2047); - coeff8 = _mm_min_epi16(coeff8, max_coeff_2047); + if (sharpen != NULL) { + const __m128i sharpen0 = _mm_loadu_si128((const __m128i*)&sharpen[0]); + const __m128i sharpen8 = _mm_loadu_si128((const __m128i*)&sharpen[8]); + coeff0 = _mm_add_epi16(coeff0, sharpen0); + coeff8 = _mm_add_epi16(coeff8, sharpen8); + } - // out = (coeff * iQ + B) >> QFIX; + // out = (coeff * iQ + B) >> QFIX { // doing calculations with 32b precision (QFIX=17) // out = (coeff * iQ) - __m128i coeff_iQ0H = _mm_mulhi_epu16(coeff0, iq0); - __m128i coeff_iQ0L = _mm_mullo_epi16(coeff0, iq0); - __m128i coeff_iQ8H = _mm_mulhi_epu16(coeff8, iq8); - __m128i coeff_iQ8L = _mm_mullo_epi16(coeff8, iq8); + const __m128i coeff_iQ0H = _mm_mulhi_epu16(coeff0, iq0); + const __m128i coeff_iQ0L = _mm_mullo_epi16(coeff0, iq0); + const __m128i coeff_iQ8H = _mm_mulhi_epu16(coeff8, iq8); + const __m128i coeff_iQ8L = _mm_mullo_epi16(coeff8, iq8); __m128i out_00 = _mm_unpacklo_epi16(coeff_iQ0L, coeff_iQ0H); __m128i out_04 = _mm_unpackhi_epi16(coeff_iQ0L, coeff_iQ0H); __m128i out_08 = _mm_unpacklo_epi16(coeff_iQ8L, coeff_iQ8H); __m128i out_12 = _mm_unpackhi_epi16(coeff_iQ8L, coeff_iQ8H); - // expand bias from 16b to 32b - __m128i bias_00 = _mm_unpacklo_epi16(bias0, zero); - __m128i bias_04 = _mm_unpackhi_epi16(bias0, zero); - __m128i bias_08 = _mm_unpacklo_epi16(bias8, zero); - __m128i bias_12 = _mm_unpackhi_epi16(bias8, zero); // out = (coeff * iQ + B) + const __m128i bias_00 = _mm_loadu_si128((const __m128i*)&mtx->bias_[0]); + const __m128i bias_04 = _mm_loadu_si128((const __m128i*)&mtx->bias_[4]); + const __m128i bias_08 = _mm_loadu_si128((const __m128i*)&mtx->bias_[8]); + const __m128i bias_12 = _mm_loadu_si128((const __m128i*)&mtx->bias_[12]); out_00 = _mm_add_epi32(out_00, bias_00); out_04 = _mm_add_epi32(out_04, bias_04); out_08 = _mm_add_epi32(out_08, bias_08); out_12 = _mm_add_epi32(out_12, bias_12); - // out = (coeff * iQ + B) >> QFIX; + // out = QUANTDIV(coeff, iQ, B, QFIX) out_00 = _mm_srai_epi32(out_00, QFIX); out_04 = _mm_srai_epi32(out_04, QFIX); out_08 = _mm_srai_epi32(out_08, QFIX); out_12 = _mm_srai_epi32(out_12, QFIX); + // pack result as 16b out0 = _mm_packs_epi32(out_00, out_04); out8 = _mm_packs_epi32(out_08, out_12); + + // if (coeff > 2047) coeff = 2047 + out0 = _mm_min_epi16(out0, max_coeff_2047); + out8 = _mm_min_epi16(out8, max_coeff_2047); } // get sign back (if (sign[j]) out_n = -out_n) @@ -772,17 +1401,8 @@ static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], in0 = _mm_mullo_epi16(out0, q0); in8 = _mm_mullo_epi16(out8, q8); - // if (coeff <= mtx->zthresh_) {in=0; out=0;} - { - __m128i cmp0 = _mm_cmpgt_epi16(coeff0, zthresh0); - __m128i cmp8 = _mm_cmpgt_epi16(coeff8, zthresh8); - in0 = _mm_and_si128(in0, cmp0); - in8 = _mm_and_si128(in8, cmp8); - _mm_storeu_si128((__m128i*)&in[0], in0); - _mm_storeu_si128((__m128i*)&in[8], in8); - out0 = _mm_and_si128(out0, cmp0); - out8 = _mm_and_si128(out8, cmp8); - } + _mm_storeu_si128((__m128i*)&in[0], in0); + _mm_storeu_si128((__m128i*)&in[8], in8); // zigzag the output before storing it. // @@ -809,29 +1429,55 @@ static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], } // detect if all 'out' values are zeroes or not - { - int32_t tmp[4]; - _mm_storeu_si128((__m128i*)tmp, packed_out); - if (n) { - tmp[0] &= ~0xff; - } - return (tmp[3] || tmp[2] || tmp[1] || tmp[0]); - } + return (_mm_movemask_epi8(_mm_cmpeq_epi8(packed_out, zero)) != 0xffff); +} + +static int QuantizeBlock(int16_t in[16], int16_t out[16], + const VP8Matrix* const mtx) { + return DoQuantizeBlock(in, out, &mtx->sharpen_[0], mtx); +} + +static int QuantizeBlockWHT(int16_t in[16], int16_t out[16], + const VP8Matrix* const mtx) { + return DoQuantizeBlock(in, out, NULL, mtx); +} + +static int Quantize2Blocks(int16_t in[32], int16_t out[32], + const VP8Matrix* const mtx) { + int nz; + const uint16_t* const sharpen = &mtx->sharpen_[0]; + nz = DoQuantizeBlock(in + 0 * 16, out + 0 * 16, sharpen, mtx) << 0; + nz |= DoQuantizeBlock(in + 1 * 16, out + 1 * 16, sharpen, mtx) << 1; + return nz; } +//------------------------------------------------------------------------------ +// Entry point + extern void VP8EncDspInitSSE2(void); -void VP8EncDspInitSSE2(void) { - VP8CollectHistogram = CollectHistogramSSE2; - VP8EncQuantizeBlock = QuantizeBlockSSE2; - VP8ITransform = ITransformSSE2; - VP8FTransform = FTransformSSE2; - VP8SSE4x4 = SSE4x4SSE2; - VP8TDisto4x4 = Disto4x4SSE2; - VP8TDisto16x16 = Disto16x16SSE2; -} - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif -#endif // WEBP_USE_SSE2 +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitSSE2(void) { + VP8CollectHistogram = CollectHistogram; + VP8EncPredLuma16 = Intra16Preds; + VP8EncPredChroma8 = IntraChromaPreds; + VP8EncPredLuma4 = Intra4Preds; + VP8EncQuantizeBlock = QuantizeBlock; + VP8EncQuantize2Blocks = Quantize2Blocks; + VP8EncQuantizeBlockWHT = QuantizeBlockWHT; + VP8ITransform = ITransform; + VP8FTransform = FTransform; + VP8FTransform2 = FTransform2; + VP8FTransformWHT = FTransformWHT; + VP8SSE16x16 = SSE16x16; + VP8SSE16x8 = SSE16x8; + VP8SSE8x8 = SSE8x8; + VP8SSE4x4 = SSE4x4; + VP8TDisto4x4 = Disto4x4; + VP8TDisto16x16 = Disto16x16; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(VP8EncDspInitSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/drivers/webp/dsp/lossless.c b/drivers/webp/dsp/lossless.c index 62a6b7b15a..5702eb3b17 100644 --- a/drivers/webp/dsp/lossless.c +++ b/drivers/webp/dsp/lossless.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Image transforms and color space conversion methods for lossless decoder. @@ -11,170 +13,16 @@ // Jyrki Alakuijala (jyrki@google.com) // Urvang Joshi (urvang@google.com) -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "./dsp.h" #include <math.h> #include <stdlib.h> -#include "./lossless.h" #include "../dec/vp8li.h" -#include "../dsp/yuv.h" -#include "../dsp/dsp.h" -#include "../enc/histogram.h" +#include "../utils/endian_inl.h" +#include "./lossless.h" #define MAX_DIFF_COST (1e30f) -// lookup table for small values of log2(int) -#define APPROX_LOG_MAX 4096 -#define LOG_2_RECIPROCAL 1.44269504088896338700465094007086 -#define LOG_LOOKUP_IDX_MAX 256 -static const float kLog2Table[LOG_LOOKUP_IDX_MAX] = { - 0.0000000000000000f, 0.0000000000000000f, - 1.0000000000000000f, 1.5849625007211560f, - 2.0000000000000000f, 2.3219280948873621f, - 2.5849625007211560f, 2.8073549220576041f, - 3.0000000000000000f, 3.1699250014423121f, - 3.3219280948873621f, 3.4594316186372973f, - 3.5849625007211560f, 3.7004397181410921f, - 3.8073549220576041f, 3.9068905956085187f, - 4.0000000000000000f, 4.0874628412503390f, - 4.1699250014423121f, 4.2479275134435852f, - 4.3219280948873626f, 4.3923174227787606f, - 4.4594316186372973f, 4.5235619560570130f, - 4.5849625007211560f, 4.6438561897747243f, - 4.7004397181410917f, 4.7548875021634682f, - 4.8073549220576037f, 4.8579809951275718f, - 4.9068905956085187f, 4.9541963103868749f, - 5.0000000000000000f, 5.0443941193584533f, - 5.0874628412503390f, 5.1292830169449663f, - 5.1699250014423121f, 5.2094533656289501f, - 5.2479275134435852f, 5.2854022188622487f, - 5.3219280948873626f, 5.3575520046180837f, - 5.3923174227787606f, 5.4262647547020979f, - 5.4594316186372973f, 5.4918530963296747f, - 5.5235619560570130f, 5.5545888516776376f, - 5.5849625007211560f, 5.6147098441152083f, - 5.6438561897747243f, 5.6724253419714951f, - 5.7004397181410917f, 5.7279204545631987f, - 5.7548875021634682f, 5.7813597135246599f, - 5.8073549220576037f, 5.8328900141647412f, - 5.8579809951275718f, 5.8826430493618415f, - 5.9068905956085187f, 5.9307373375628866f, - 5.9541963103868749f, 5.9772799234999167f, - 6.0000000000000000f, 6.0223678130284543f, - 6.0443941193584533f, 6.0660891904577720f, - 6.0874628412503390f, 6.1085244567781691f, - 6.1292830169449663f, 6.1497471195046822f, - 6.1699250014423121f, 6.1898245588800175f, - 6.2094533656289501f, 6.2288186904958804f, - 6.2479275134435852f, 6.2667865406949010f, - 6.2854022188622487f, 6.3037807481771030f, - 6.3219280948873626f, 6.3398500028846243f, - 6.3575520046180837f, 6.3750394313469245f, - 6.3923174227787606f, 6.4093909361377017f, - 6.4262647547020979f, 6.4429434958487279f, - 6.4594316186372973f, 6.4757334309663976f, - 6.4918530963296747f, 6.5077946401986963f, - 6.5235619560570130f, 6.5391588111080309f, - 6.5545888516776376f, 6.5698556083309478f, - 6.5849625007211560f, 6.5999128421871278f, - 6.6147098441152083f, 6.6293566200796094f, - 6.6438561897747243f, 6.6582114827517946f, - 6.6724253419714951f, 6.6865005271832185f, - 6.7004397181410917f, 6.7142455176661224f, - 6.7279204545631987f, 6.7414669864011464f, - 6.7548875021634682f, 6.7681843247769259f, - 6.7813597135246599f, 6.7944158663501061f, - 6.8073549220576037f, 6.8201789624151878f, - 6.8328900141647412f, 6.8454900509443747f, - 6.8579809951275718f, 6.8703647195834047f, - 6.8826430493618415f, 6.8948177633079437f, - 6.9068905956085187f, 6.9188632372745946f, - 6.9307373375628866f, 6.9425145053392398f, - 6.9541963103868749f, 6.9657842846620869f, - 6.9772799234999167f, 6.9886846867721654f, - 7.0000000000000000f, 7.0112272554232539f, - 7.0223678130284543f, 7.0334230015374501f, - 7.0443941193584533f, 7.0552824355011898f, - 7.0660891904577720f, 7.0768155970508308f, - 7.0874628412503390f, 7.0980320829605263f, - 7.1085244567781691f, 7.1189410727235076f, - 7.1292830169449663f, 7.1395513523987936f, - 7.1497471195046822f, 7.1598713367783890f, - 7.1699250014423121f, 7.1799090900149344f, - 7.1898245588800175f, 7.1996723448363644f, - 7.2094533656289501f, 7.2191685204621611f, - 7.2288186904958804f, 7.2384047393250785f, - 7.2479275134435852f, 7.2573878426926521f, - 7.2667865406949010f, 7.2761244052742375f, - 7.2854022188622487f, 7.2946207488916270f, - 7.3037807481771030f, 7.3128829552843557f, - 7.3219280948873626f, 7.3309168781146167f, - 7.3398500028846243f, 7.3487281542310771f, - 7.3575520046180837f, 7.3663222142458160f, - 7.3750394313469245f, 7.3837042924740519f, - 7.3923174227787606f, 7.4008794362821843f, - 7.4093909361377017f, 7.4178525148858982f, - 7.4262647547020979f, 7.4346282276367245f, - 7.4429434958487279f, 7.4512111118323289f, - 7.4594316186372973f, 7.4676055500829976f, - 7.4757334309663976f, 7.4838157772642563f, - 7.4918530963296747f, 7.4998458870832056f, - 7.5077946401986963f, 7.5156998382840427f, - 7.5235619560570130f, 7.5313814605163118f, - 7.5391588111080309f, 7.5468944598876364f, - 7.5545888516776376f, 7.5622424242210728f, - 7.5698556083309478f, 7.5774288280357486f, - 7.5849625007211560f, 7.5924570372680806f, - 7.5999128421871278f, 7.6073303137496104f, - 7.6147098441152083f, 7.6220518194563764f, - 7.6293566200796094f, 7.6366246205436487f, - 7.6438561897747243f, 7.6510516911789281f, - 7.6582114827517946f, 7.6653359171851764f, - 7.6724253419714951f, 7.6794800995054464f, - 7.6865005271832185f, 7.6934869574993252f, - 7.7004397181410917f, 7.7073591320808825f, - 7.7142455176661224f, 7.7210991887071855f, - 7.7279204545631987f, 7.7347096202258383f, - 7.7414669864011464f, 7.7481928495894605f, - 7.7548875021634682f, 7.7615512324444795f, - 7.7681843247769259f, 7.7747870596011736f, - 7.7813597135246599f, 7.7879025593914317f, - 7.7944158663501061f, 7.8008998999203047f, - 7.8073549220576037f, 7.8137811912170374f, - 7.8201789624151878f, 7.8265484872909150f, - 7.8328900141647412f, 7.8392037880969436f, - 7.8454900509443747f, 7.8517490414160571f, - 7.8579809951275718f, 7.8641861446542797f, - 7.8703647195834047f, 7.8765169465649993f, - 7.8826430493618415f, 7.8887432488982591f, - 7.8948177633079437f, 7.9008668079807486f, - 7.9068905956085187f, 7.9128893362299619f, - 7.9188632372745946f, 7.9248125036057812f, - 7.9307373375628866f, 7.9366379390025709f, - 7.9425145053392398f, 7.9483672315846778f, - 7.9541963103868749f, 7.9600019320680805f, - 7.9657842846620869f, 7.9715435539507719f, - 7.9772799234999167f, 7.9829935746943103f, - 7.9886846867721654f, 7.9943534368588577f -}; - -float VP8LFastLog2(int v) { - if (v < LOG_LOOKUP_IDX_MAX) { - return kLog2Table[v]; - } else if (v < APPROX_LOG_MAX) { - int log_cnt = 0; - while (v >= LOG_LOOKUP_IDX_MAX) { - ++log_cnt; - v = v >> 1; - } - return kLog2Table[v] + (float)log_cnt; - } else { - return (float)(LOG_2_RECIPROCAL * log((double)v)); - } -} - //------------------------------------------------------------------------------ // Image transforms. @@ -186,7 +34,7 @@ static WEBP_INLINE void AddPixelsEq(uint32_t* a, uint32_t b) { } static WEBP_INLINE uint32_t Average2(uint32_t a0, uint32_t a1) { - return (((a0 ^ a1) & 0xfefefefeL) >> 1) + (a0 & a1); + return (((a0 ^ a1) & 0xfefefefeu) >> 1) + (a0 & a1); } static WEBP_INLINE uint32_t Average3(uint32_t a0, uint32_t a1, uint32_t a2) { @@ -221,7 +69,7 @@ static WEBP_INLINE uint32_t ClampedAddSubtractFull(uint32_t c0, uint32_t c1, (c1 >> 8) & 0xff, (c2 >> 8) & 0xff); const int b = AddSubtractComponentFull(c0 & 0xff, c1 & 0xff, c2 & 0xff); - return (a << 24) | (r << 16) | (g << 8) | b; + return ((uint32_t)a << 24) | (r << 16) | (g << 8) | b; } static WEBP_INLINE int AddSubtractComponentHalf(int a, int b) { @@ -235,22 +83,30 @@ static WEBP_INLINE uint32_t ClampedAddSubtractHalf(uint32_t c0, uint32_t c1, const int r = AddSubtractComponentHalf((ave >> 16) & 0xff, (c2 >> 16) & 0xff); const int g = AddSubtractComponentHalf((ave >> 8) & 0xff, (c2 >> 8) & 0xff); const int b = AddSubtractComponentHalf((ave >> 0) & 0xff, (c2 >> 0) & 0xff); - return (a << 24) | (r << 16) | (g << 8) | b; + return ((uint32_t)a << 24) | (r << 16) | (g << 8) | b; } -static WEBP_INLINE int Sub3(int a, int b, int c) { - const int pa = b - c; - const int pb = a - c; - return abs(pa) - abs(pb); +// gcc-4.9 on ARM generates incorrect code in Select() when Sub3() is inlined. +#if defined(__arm__) && LOCAL_GCC_VERSION == 0x409 +# define LOCAL_INLINE __attribute__ ((noinline)) +#else +# define LOCAL_INLINE WEBP_INLINE +#endif + +static LOCAL_INLINE int Sub3(int a, int b, int c) { + const int pb = b - c; + const int pa = a - c; + return abs(pb) - abs(pa); } +#undef LOCAL_INLINE + static WEBP_INLINE uint32_t Select(uint32_t a, uint32_t b, uint32_t c) { const int pa_minus_pb = Sub3((a >> 24) , (b >> 24) , (c >> 24) ) + Sub3((a >> 16) & 0xff, (b >> 16) & 0xff, (c >> 16) & 0xff) + Sub3((a >> 8) & 0xff, (b >> 8) & 0xff, (c >> 8) & 0xff) + Sub3((a ) & 0xff, (b ) & 0xff, (c ) & 0xff); - return (pa_minus_pb <= 0) ? a : b; } @@ -317,208 +173,7 @@ static uint32_t Predictor13(uint32_t left, const uint32_t* const top) { return pred; } -typedef uint32_t (*PredictorFunc)(uint32_t left, const uint32_t* const top); -static const PredictorFunc kPredictors[16] = { - Predictor0, Predictor1, Predictor2, Predictor3, - Predictor4, Predictor5, Predictor6, Predictor7, - Predictor8, Predictor9, Predictor10, Predictor11, - Predictor12, Predictor13, - Predictor0, Predictor0 // <- padding security sentinels -}; - -// TODO(vikasa): Replace 256 etc with defines. -static float PredictionCostSpatial(const int* counts, - int weight_0, double exp_val) { - const int significant_symbols = 16; - const double exp_decay_factor = 0.6; - double bits = weight_0 * counts[0]; - int i; - for (i = 1; i < significant_symbols; ++i) { - bits += exp_val * (counts[i] + counts[256 - i]); - exp_val *= exp_decay_factor; - } - return (float)(-0.1 * bits); -} - -// Compute the Shanon's entropy: Sum(p*log2(p)) -static float ShannonEntropy(const int* const array, int n) { - int i; - float retval = 0.f; - int sum = 0; - for (i = 0; i < n; ++i) { - if (array[i] != 0) { - sum += array[i]; - retval -= VP8LFastSLog2(array[i]); - } - } - retval += VP8LFastSLog2(sum); - return retval; -} - -static float PredictionCostSpatialHistogram(int accumulated[4][256], - int tile[4][256]) { - int i; - int k; - int combo[256]; - double retval = 0; - for (i = 0; i < 4; ++i) { - const double exp_val = 0.94; - retval += PredictionCostSpatial(&tile[i][0], 1, exp_val); - retval += ShannonEntropy(&tile[i][0], 256); - for (k = 0; k < 256; ++k) { - combo[k] = accumulated[i][k] + tile[i][k]; - } - retval += ShannonEntropy(&combo[0], 256); - } - return (float)retval; -} - -static int GetBestPredictorForTile(int width, int height, - int tile_x, int tile_y, int bits, - int accumulated[4][256], - const uint32_t* const argb_scratch) { - const int kNumPredModes = 14; - const int col_start = tile_x << bits; - const int row_start = tile_y << bits; - const int tile_size = 1 << bits; - const int ymax = (tile_size <= height - row_start) ? - tile_size : height - row_start; - const int xmax = (tile_size <= width - col_start) ? - tile_size : width - col_start; - int histo[4][256]; - float best_diff = MAX_DIFF_COST; - int best_mode = 0; - - int mode; - for (mode = 0; mode < kNumPredModes; ++mode) { - const uint32_t* current_row = argb_scratch; - const PredictorFunc pred_func = kPredictors[mode]; - float cur_diff; - int y; - memset(&histo[0][0], 0, sizeof(histo)); - for (y = 0; y < ymax; ++y) { - int x; - const int row = row_start + y; - const uint32_t* const upper_row = current_row; - current_row = upper_row + width; - for (x = 0; x < xmax; ++x) { - const int col = col_start + x; - uint32_t predict; - uint32_t predict_diff; - if (row == 0) { - predict = (col == 0) ? ARGB_BLACK : current_row[col - 1]; // Left. - } else if (col == 0) { - predict = upper_row[col]; // Top. - } else { - predict = pred_func(current_row[col - 1], upper_row + col); - } - predict_diff = VP8LSubPixels(current_row[col], predict); - ++histo[0][predict_diff >> 24]; - ++histo[1][((predict_diff >> 16) & 0xff)]; - ++histo[2][((predict_diff >> 8) & 0xff)]; - ++histo[3][(predict_diff & 0xff)]; - } - } - cur_diff = PredictionCostSpatialHistogram(accumulated, histo); - if (cur_diff < best_diff) { - best_diff = cur_diff; - best_mode = mode; - } - } - - return best_mode; -} - -static void CopyTileWithPrediction(int width, int height, - int tile_x, int tile_y, int bits, int mode, - const uint32_t* const argb_scratch, - uint32_t* const argb) { - const int col_start = tile_x << bits; - const int row_start = tile_y << bits; - const int tile_size = 1 << bits; - const int ymax = (tile_size <= height - row_start) ? - tile_size : height - row_start; - const int xmax = (tile_size <= width - col_start) ? - tile_size : width - col_start; - const PredictorFunc pred_func = kPredictors[mode]; - const uint32_t* current_row = argb_scratch; - - int y; - for (y = 0; y < ymax; ++y) { - int x; - const int row = row_start + y; - const uint32_t* const upper_row = current_row; - current_row = upper_row + width; - for (x = 0; x < xmax; ++x) { - const int col = col_start + x; - const int pix = row * width + col; - uint32_t predict; - if (row == 0) { - predict = (col == 0) ? ARGB_BLACK : current_row[col - 1]; // Left. - } else if (col == 0) { - predict = upper_row[col]; // Top. - } else { - predict = pred_func(current_row[col - 1], upper_row + col); - } - argb[pix] = VP8LSubPixels(current_row[col], predict); - } - } -} - -void VP8LResidualImage(int width, int height, int bits, - uint32_t* const argb, uint32_t* const argb_scratch, - uint32_t* const image) { - const int max_tile_size = 1 << bits; - const int tiles_per_row = VP8LSubSampleSize(width, bits); - const int tiles_per_col = VP8LSubSampleSize(height, bits); - uint32_t* const upper_row = argb_scratch; - uint32_t* const current_tile_rows = argb_scratch + width; - int tile_y; - int histo[4][256]; - memset(histo, 0, sizeof(histo)); - for (tile_y = 0; tile_y < tiles_per_col; ++tile_y) { - const int tile_y_offset = tile_y * max_tile_size; - const int this_tile_height = - (tile_y < tiles_per_col - 1) ? max_tile_size : height - tile_y_offset; - int tile_x; - if (tile_y > 0) { - memcpy(upper_row, current_tile_rows + (max_tile_size - 1) * width, - width * sizeof(*upper_row)); - } - memcpy(current_tile_rows, &argb[tile_y_offset * width], - this_tile_height * width * sizeof(*current_tile_rows)); - for (tile_x = 0; tile_x < tiles_per_row; ++tile_x) { - int pred; - int y; - const int tile_x_offset = tile_x * max_tile_size; - int all_x_max = tile_x_offset + max_tile_size; - if (all_x_max > width) { - all_x_max = width; - } - pred = GetBestPredictorForTile(width, height, tile_x, tile_y, bits, histo, - argb_scratch); - image[tile_y * tiles_per_row + tile_x] = 0xff000000u | (pred << 8); - CopyTileWithPrediction(width, height, tile_x, tile_y, bits, pred, - argb_scratch, argb); - for (y = 0; y < max_tile_size; ++y) { - int ix; - int all_x; - int all_y = tile_y_offset + y; - if (all_y >= height) { - break; - } - ix = all_y * width + tile_x_offset; - for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { - const uint32_t a = argb[ix]; - ++histo[0][a >> 24]; - ++histo[1][((a >> 16) & 0xff)]; - ++histo[2][((a >> 8) & 0xff)]; - ++histo[3][(a & 0xff)]; - } - } - } - } -} +//------------------------------------------------------------------------------ // Inverse prediction. static void PredictorInverseTransform(const VP8LTransform* const transform, @@ -538,29 +193,36 @@ static void PredictorInverseTransform(const VP8LTransform* const transform, { int y = y_start; - const int mask = (1 << transform->bits_) - 1; + const int tile_width = 1 << transform->bits_; + const int mask = tile_width - 1; + const int safe_width = width & ~mask; const int tiles_per_row = VP8LSubSampleSize(width, transform->bits_); const uint32_t* pred_mode_base = transform->data_ + (y >> transform->bits_) * tiles_per_row; while (y < y_end) { - int x; const uint32_t pred2 = Predictor2(data[-1], data - width); const uint32_t* pred_mode_src = pred_mode_base; - PredictorFunc pred_func; - + VP8LPredictorFunc pred_func; + int x = 1; + int t = 1; // First pixel follows the T (mode=2) mode. AddPixelsEq(data, pred2); - // .. the rest: - pred_func = kPredictors[((*pred_mode_src++) >> 8) & 0xf]; - for (x = 1; x < width; ++x) { - uint32_t pred; - if ((x & mask) == 0) { // start of tile. Read predictor function. - pred_func = kPredictors[((*pred_mode_src++) >> 8) & 0xf]; + while (x < safe_width) { + pred_func = VP8LPredictors[((*pred_mode_src++) >> 8) & 0xf]; + for (; t < tile_width; ++t, ++x) { + const uint32_t pred = pred_func(data[x - 1], data + x - width); + AddPixelsEq(data + x, pred); + } + t = 0; + } + if (x < width) { + pred_func = VP8LPredictors[((*pred_mode_src++) >> 8) & 0xf]; + for (; x < width; ++x) { + const uint32_t pred = pred_func(data[x - 1], data + x - width); + AddPixelsEq(data + x, pred); } - pred = pred_func(data[x - 1], data + x - width); - AddPixelsEq(data + x, pred); } data += width; ++y; @@ -571,326 +233,47 @@ static void PredictorInverseTransform(const VP8LTransform* const transform, } } -void VP8LSubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixs) { - int i; - for (i = 0; i < num_pixs; ++i) { - const uint32_t argb = argb_data[i]; - const uint32_t green = (argb >> 8) & 0xff; - const uint32_t new_r = (((argb >> 16) & 0xff) - green) & 0xff; - const uint32_t new_b = ((argb & 0xff) - green) & 0xff; - argb_data[i] = (argb & 0xff00ff00) | (new_r << 16) | new_b; - } -} - // Add green to blue and red channels (i.e. perform the inverse transform of // 'subtract green'). -static void AddGreenToBlueAndRed(const VP8LTransform* const transform, - int y_start, int y_end, uint32_t* data) { - const int width = transform->xsize_; - const uint32_t* const data_end = data + (y_end - y_start) * width; - while (data < data_end) { - const uint32_t argb = *data; - // "* 0001001u" is equivalent to "(green << 16) + green)" +void VP8LAddGreenToBlueAndRed_C(uint32_t* data, int num_pixels) { + int i; + for (i = 0; i < num_pixels; ++i) { + const uint32_t argb = data[i]; const uint32_t green = ((argb >> 8) & 0xff); uint32_t red_blue = (argb & 0x00ff00ffu); red_blue += (green << 16) | green; red_blue &= 0x00ff00ffu; - *data++ = (argb & 0xff00ff00u) | red_blue; + data[i] = (argb & 0xff00ff00u) | red_blue; } } -typedef struct { - // Note: the members are uint8_t, so that any negative values are - // automatically converted to "mod 256" values. - uint8_t green_to_red_; - uint8_t green_to_blue_; - uint8_t red_to_blue_; -} Multipliers; - -static WEBP_INLINE void MultipliersClear(Multipliers* m) { - m->green_to_red_ = 0; - m->green_to_blue_ = 0; - m->red_to_blue_ = 0; -} - static WEBP_INLINE uint32_t ColorTransformDelta(int8_t color_pred, int8_t color) { return (uint32_t)((int)(color_pred) * color) >> 5; } static WEBP_INLINE void ColorCodeToMultipliers(uint32_t color_code, - Multipliers* const m) { + VP8LMultipliers* const m) { m->green_to_red_ = (color_code >> 0) & 0xff; m->green_to_blue_ = (color_code >> 8) & 0xff; m->red_to_blue_ = (color_code >> 16) & 0xff; } -static WEBP_INLINE uint32_t MultipliersToColorCode(Multipliers* const m) { - return 0xff000000u | - ((uint32_t)(m->red_to_blue_) << 16) | - ((uint32_t)(m->green_to_blue_) << 8) | - m->green_to_red_; -} - -static WEBP_INLINE uint32_t TransformColor(const Multipliers* const m, - uint32_t argb, int inverse) { - const uint32_t green = argb >> 8; - const uint32_t red = argb >> 16; - uint32_t new_red = red; - uint32_t new_blue = argb; - - if (inverse) { +void VP8LTransformColorInverse_C(const VP8LMultipliers* const m, uint32_t* data, + int num_pixels) { + int i; + for (i = 0; i < num_pixels; ++i) { + const uint32_t argb = data[i]; + const uint32_t green = argb >> 8; + const uint32_t red = argb >> 16; + uint32_t new_red = red; + uint32_t new_blue = argb; new_red += ColorTransformDelta(m->green_to_red_, green); new_red &= 0xff; new_blue += ColorTransformDelta(m->green_to_blue_, green); new_blue += ColorTransformDelta(m->red_to_blue_, new_red); new_blue &= 0xff; - } else { - new_red -= ColorTransformDelta(m->green_to_red_, green); - new_red &= 0xff; - new_blue -= ColorTransformDelta(m->green_to_blue_, green); - new_blue -= ColorTransformDelta(m->red_to_blue_, red); - new_blue &= 0xff; - } - return (argb & 0xff00ff00u) | (new_red << 16) | (new_blue); -} - -static WEBP_INLINE int SkipRepeatedPixels(const uint32_t* const argb, - int ix, int xsize) { - const uint32_t v = argb[ix]; - if (ix >= xsize + 3) { - if (v == argb[ix - xsize] && - argb[ix - 1] == argb[ix - xsize - 1] && - argb[ix - 2] == argb[ix - xsize - 2] && - argb[ix - 3] == argb[ix - xsize - 3]) { - return 1; - } - return v == argb[ix - 3] && v == argb[ix - 2] && v == argb[ix - 1]; - } else if (ix >= 3) { - return v == argb[ix - 3] && v == argb[ix - 2] && v == argb[ix - 1]; - } - return 0; -} - -static float PredictionCostCrossColor(const int accumulated[256], - const int counts[256]) { - // Favor low entropy, locally and globally. - int i; - int combo[256]; - for (i = 0; i < 256; ++i) { - combo[i] = accumulated[i] + counts[i]; - } - return ShannonEntropy(combo, 256) + - ShannonEntropy(counts, 256) + - PredictionCostSpatial(counts, 3, 2.4); // Favor small absolute values. -} - -static Multipliers GetBestColorTransformForTile( - int tile_x, int tile_y, int bits, - Multipliers prevX, - Multipliers prevY, - int step, int xsize, int ysize, - int* accumulated_red_histo, - int* accumulated_blue_histo, - const uint32_t* const argb) { - float best_diff = MAX_DIFF_COST; - float cur_diff; - const int halfstep = step / 2; - const int max_tile_size = 1 << bits; - const int tile_y_offset = tile_y * max_tile_size; - const int tile_x_offset = tile_x * max_tile_size; - int green_to_red; - int green_to_blue; - int red_to_blue; - int all_x_max = tile_x_offset + max_tile_size; - int all_y_max = tile_y_offset + max_tile_size; - Multipliers best_tx; - MultipliersClear(&best_tx); - if (all_x_max > xsize) { - all_x_max = xsize; - } - if (all_y_max > ysize) { - all_y_max = ysize; - } - for (green_to_red = -64; green_to_red <= 64; green_to_red += halfstep) { - int histo[256] = { 0 }; - int all_y; - Multipliers tx; - MultipliersClear(&tx); - tx.green_to_red_ = green_to_red & 0xff; - - for (all_y = tile_y_offset; all_y < all_y_max; ++all_y) { - uint32_t predict; - int ix = all_y * xsize + tile_x_offset; - int all_x; - for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { - if (SkipRepeatedPixels(argb, ix, xsize)) { - continue; - } - predict = TransformColor(&tx, argb[ix], 0); - ++histo[(predict >> 16) & 0xff]; // red. - } - } - cur_diff = PredictionCostCrossColor(&accumulated_red_histo[0], &histo[0]); - if (tx.green_to_red_ == prevX.green_to_red_) { - cur_diff -= 3; // favor keeping the areas locally similar - } - if (tx.green_to_red_ == prevY.green_to_red_) { - cur_diff -= 3; // favor keeping the areas locally similar - } - if (tx.green_to_red_ == 0) { - cur_diff -= 3; - } - if (cur_diff < best_diff) { - best_diff = cur_diff; - best_tx = tx; - } - } - best_diff = MAX_DIFF_COST; - green_to_red = best_tx.green_to_red_; - for (green_to_blue = -32; green_to_blue <= 32; green_to_blue += step) { - for (red_to_blue = -32; red_to_blue <= 32; red_to_blue += step) { - int all_y; - int histo[256] = { 0 }; - Multipliers tx; - tx.green_to_red_ = green_to_red; - tx.green_to_blue_ = green_to_blue; - tx.red_to_blue_ = red_to_blue; - for (all_y = tile_y_offset; all_y < all_y_max; ++all_y) { - uint32_t predict; - int all_x; - int ix = all_y * xsize + tile_x_offset; - for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { - if (SkipRepeatedPixels(argb, ix, xsize)) { - continue; - } - predict = TransformColor(&tx, argb[ix], 0); - ++histo[predict & 0xff]; // blue. - } - } - cur_diff = - PredictionCostCrossColor(&accumulated_blue_histo[0], &histo[0]); - if (tx.green_to_blue_ == prevX.green_to_blue_) { - cur_diff -= 3; // favor keeping the areas locally similar - } - if (tx.green_to_blue_ == prevY.green_to_blue_) { - cur_diff -= 3; // favor keeping the areas locally similar - } - if (tx.red_to_blue_ == prevX.red_to_blue_) { - cur_diff -= 3; // favor keeping the areas locally similar - } - if (tx.red_to_blue_ == prevY.red_to_blue_) { - cur_diff -= 3; // favor keeping the areas locally similar - } - if (tx.green_to_blue_ == 0) { - cur_diff -= 3; - } - if (tx.red_to_blue_ == 0) { - cur_diff -= 3; - } - if (cur_diff < best_diff) { - best_diff = cur_diff; - best_tx = tx; - } - } - } - return best_tx; -} - -static void CopyTileWithColorTransform(int xsize, int ysize, - int tile_x, int tile_y, int bits, - Multipliers color_transform, - uint32_t* const argb) { - int y; - int xscan = 1 << bits; - int yscan = 1 << bits; - tile_x <<= bits; - tile_y <<= bits; - if (xscan > xsize - tile_x) { - xscan = xsize - tile_x; - } - if (yscan > ysize - tile_y) { - yscan = ysize - tile_y; - } - yscan += tile_y; - for (y = tile_y; y < yscan; ++y) { - int ix = y * xsize + tile_x; - const int end_ix = ix + xscan; - for (; ix < end_ix; ++ix) { - argb[ix] = TransformColor(&color_transform, argb[ix], 0); - } - } -} - -void VP8LColorSpaceTransform(int width, int height, int bits, int step, - uint32_t* const argb, uint32_t* image) { - const int max_tile_size = 1 << bits; - int tile_xsize = VP8LSubSampleSize(width, bits); - int tile_ysize = VP8LSubSampleSize(height, bits); - int accumulated_red_histo[256] = { 0 }; - int accumulated_blue_histo[256] = { 0 }; - int tile_y; - int tile_x; - Multipliers prevX; - Multipliers prevY; - MultipliersClear(&prevY); - MultipliersClear(&prevX); - for (tile_y = 0; tile_y < tile_ysize; ++tile_y) { - for (tile_x = 0; tile_x < tile_xsize; ++tile_x) { - Multipliers color_transform; - int all_x_max; - int y; - const int tile_y_offset = tile_y * max_tile_size; - const int tile_x_offset = tile_x * max_tile_size; - if (tile_y != 0) { - ColorCodeToMultipliers(image[tile_y * tile_xsize + tile_x - 1], &prevX); - ColorCodeToMultipliers(image[(tile_y - 1) * tile_xsize + tile_x], - &prevY); - } else if (tile_x != 0) { - ColorCodeToMultipliers(image[tile_y * tile_xsize + tile_x - 1], &prevX); - } - color_transform = - GetBestColorTransformForTile(tile_x, tile_y, bits, - prevX, prevY, - step, width, height, - &accumulated_red_histo[0], - &accumulated_blue_histo[0], - argb); - image[tile_y * tile_xsize + tile_x] = - MultipliersToColorCode(&color_transform); - CopyTileWithColorTransform(width, height, tile_x, tile_y, bits, - color_transform, argb); - - // Gather accumulated histogram data. - all_x_max = tile_x_offset + max_tile_size; - if (all_x_max > width) { - all_x_max = width; - } - for (y = 0; y < max_tile_size; ++y) { - int ix; - int all_x; - int all_y = tile_y_offset + y; - if (all_y >= height) { - break; - } - ix = all_y * width + tile_x_offset; - for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { - if (ix >= 2 && - argb[ix] == argb[ix - 2] && - argb[ix] == argb[ix - 1]) { - continue; // repeated pixels are handled by backward references - } - if (ix >= width + 2 && - argb[ix - 2] == argb[ix - width - 2] && - argb[ix - 1] == argb[ix - width - 1] && - argb[ix] == argb[ix - width]) { - continue; // repeated pixels are handled by backward references - } - ++accumulated_red_histo[(argb[ix] >> 16) & 0xff]; - ++accumulated_blue_histo[argb[ix] & 0xff]; - } - } - } + data[i] = (argb & 0xff00ff00u) | (new_red << 16) | (new_blue); } } @@ -898,7 +281,10 @@ void VP8LColorSpaceTransform(int width, int height, int bits, int step, static void ColorSpaceInverseTransform(const VP8LTransform* const transform, int y_start, int y_end, uint32_t* data) { const int width = transform->xsize_; - const int mask = (1 << transform->bits_) - 1; + const int tile_width = 1 << transform->bits_; + const int mask = tile_width - 1; + const int safe_width = width & ~mask; + const int remaining_width = width - safe_width; const int tiles_per_row = VP8LSubSampleSize(width, transform->bits_); int y = y_start; const uint32_t* pred_row = @@ -906,68 +292,89 @@ static void ColorSpaceInverseTransform(const VP8LTransform* const transform, while (y < y_end) { const uint32_t* pred = pred_row; - Multipliers m = { 0, 0, 0 }; - int x; - - for (x = 0; x < width; ++x) { - if ((x & mask) == 0) ColorCodeToMultipliers(*pred++, &m); - data[x] = TransformColor(&m, data[x], 1); + VP8LMultipliers m = { 0, 0, 0 }; + const uint32_t* const data_safe_end = data + safe_width; + const uint32_t* const data_end = data + width; + while (data < data_safe_end) { + ColorCodeToMultipliers(*pred++, &m); + VP8LTransformColorInverse(&m, data, tile_width); + data += tile_width; + } + if (data < data_end) { // Left-overs using C-version. + ColorCodeToMultipliers(*pred++, &m); + VP8LTransformColorInverse(&m, data, remaining_width); + data += remaining_width; } - data += width; ++y; - if ((y & mask) == 0) pred_row += tiles_per_row;; + if ((y & mask) == 0) pred_row += tiles_per_row; } } // Separate out pixels packed together using pixel-bundling. -static void ColorIndexInverseTransform( - const VP8LTransform* const transform, - int y_start, int y_end, const uint32_t* src, uint32_t* dst) { - int y; - const int bits_per_pixel = 8 >> transform->bits_; - const int width = transform->xsize_; - const uint32_t* const color_map = transform->data_; - if (bits_per_pixel < 8) { - const int pixels_per_byte = 1 << transform->bits_; - const int count_mask = pixels_per_byte - 1; - const uint32_t bit_mask = (1 << bits_per_pixel) - 1; - for (y = y_start; y < y_end; ++y) { - uint32_t packed_pixels = 0; - int x; - for (x = 0; x < width; ++x) { - // We need to load fresh 'packed_pixels' once every 'pixels_per_byte' - // increments of x. Fortunately, pixels_per_byte is a power of 2, so - // can just use a mask for that, instead of decrementing a counter. - if ((x & count_mask) == 0) packed_pixels = ((*src++) >> 8) & 0xff; - *dst++ = color_map[packed_pixels & bit_mask]; - packed_pixels >>= bits_per_pixel; - } - } - } else { - for (y = y_start; y < y_end; ++y) { - int x; - for (x = 0; x < width; ++x) { - *dst++ = color_map[((*src++) >> 8) & 0xff]; - } - } - } -} +// We define two methods for ARGB data (uint32_t) and alpha-only data (uint8_t). +#define COLOR_INDEX_INVERSE(FUNC_NAME, F_NAME, STATIC_DECL, TYPE, BIT_SUFFIX, \ + GET_INDEX, GET_VALUE) \ +static void F_NAME(const TYPE* src, const uint32_t* const color_map, \ + TYPE* dst, int y_start, int y_end, int width) { \ + int y; \ + for (y = y_start; y < y_end; ++y) { \ + int x; \ + for (x = 0; x < width; ++x) { \ + *dst++ = GET_VALUE(color_map[GET_INDEX(*src++)]); \ + } \ + } \ +} \ +STATIC_DECL void FUNC_NAME(const VP8LTransform* const transform, \ + int y_start, int y_end, const TYPE* src, \ + TYPE* dst) { \ + int y; \ + const int bits_per_pixel = 8 >> transform->bits_; \ + const int width = transform->xsize_; \ + const uint32_t* const color_map = transform->data_; \ + if (bits_per_pixel < 8) { \ + const int pixels_per_byte = 1 << transform->bits_; \ + const int count_mask = pixels_per_byte - 1; \ + const uint32_t bit_mask = (1 << bits_per_pixel) - 1; \ + for (y = y_start; y < y_end; ++y) { \ + uint32_t packed_pixels = 0; \ + int x; \ + for (x = 0; x < width; ++x) { \ + /* We need to load fresh 'packed_pixels' once every */ \ + /* 'pixels_per_byte' increments of x. Fortunately, pixels_per_byte */ \ + /* is a power of 2, so can just use a mask for that, instead of */ \ + /* decrementing a counter. */ \ + if ((x & count_mask) == 0) packed_pixels = GET_INDEX(*src++); \ + *dst++ = GET_VALUE(color_map[packed_pixels & bit_mask]); \ + packed_pixels >>= bits_per_pixel; \ + } \ + } \ + } else { \ + VP8LMapColor##BIT_SUFFIX(src, color_map, dst, y_start, y_end, width); \ + } \ +} + +COLOR_INDEX_INVERSE(ColorIndexInverseTransform, MapARGB, static, uint32_t, 32b, + VP8GetARGBIndex, VP8GetARGBValue) +COLOR_INDEX_INVERSE(VP8LColorIndexInverseTransformAlpha, MapAlpha, , uint8_t, + 8b, VP8GetAlphaIndex, VP8GetAlphaValue) + +#undef COLOR_INDEX_INVERSE void VP8LInverseTransform(const VP8LTransform* const transform, int row_start, int row_end, const uint32_t* const in, uint32_t* const out) { + const int width = transform->xsize_; assert(row_start < row_end); assert(row_end <= transform->ysize_); switch (transform->type_) { case SUBTRACT_GREEN: - AddGreenToBlueAndRed(transform, row_start, row_end, out); + VP8LAddGreenToBlueAndRed(out, (row_end - row_start) * width); break; case PREDICTOR_TRANSFORM: PredictorInverseTransform(transform, row_start, row_end, out); if (row_end != transform->ysize_) { // The last predicted row in this iteration will be the top-pred row // for the first row in next iteration. - const int width = transform->xsize_; memcpy(out - width, out + (row_end - row_start - 1) * width, width * sizeof(*out)); } @@ -982,7 +389,7 @@ void VP8LInverseTransform(const VP8LTransform* const transform, // Also, note that this is the only transform that applies on // the effective width of VP8LSubSampleSize(xsize_, bits_). All other // transforms work on effective width of xsize_. - const int out_stride = (row_end - row_start) * transform->xsize_; + const int out_stride = (row_end - row_start) * width; const int in_stride = (row_end - row_start) * VP8LSubSampleSize(transform->xsize_, transform->bits_); uint32_t* const src = out + out_stride - in_stride; @@ -1006,8 +413,8 @@ static int is_big_endian(void) { return (tmp.b[0] != 1); } -static void ConvertBGRAToRGB(const uint32_t* src, - int num_pixels, uint8_t* dst) { +void VP8LConvertBGRAToRGB_C(const uint32_t* src, + int num_pixels, uint8_t* dst) { const uint32_t* const src_end = src + num_pixels; while (src < src_end) { const uint32_t argb = *src++; @@ -1017,8 +424,8 @@ static void ConvertBGRAToRGB(const uint32_t* src, } } -static void ConvertBGRAToRGBA(const uint32_t* src, - int num_pixels, uint8_t* dst) { +void VP8LConvertBGRAToRGBA_C(const uint32_t* src, + int num_pixels, uint8_t* dst) { const uint32_t* const src_end = src + num_pixels; while (src < src_end) { const uint32_t argb = *src++; @@ -1029,28 +436,42 @@ static void ConvertBGRAToRGBA(const uint32_t* src, } } -static void ConvertBGRAToRGBA4444(const uint32_t* src, - int num_pixels, uint8_t* dst) { +void VP8LConvertBGRAToRGBA4444_C(const uint32_t* src, + int num_pixels, uint8_t* dst) { const uint32_t* const src_end = src + num_pixels; while (src < src_end) { const uint32_t argb = *src++; - *dst++ = ((argb >> 16) & 0xf0) | ((argb >> 12) & 0xf); - *dst++ = ((argb >> 0) & 0xf0) | ((argb >> 28) & 0xf); + const uint8_t rg = ((argb >> 16) & 0xf0) | ((argb >> 12) & 0xf); + const uint8_t ba = ((argb >> 0) & 0xf0) | ((argb >> 28) & 0xf); +#ifdef WEBP_SWAP_16BIT_CSP + *dst++ = ba; + *dst++ = rg; +#else + *dst++ = rg; + *dst++ = ba; +#endif } } -static void ConvertBGRAToRGB565(const uint32_t* src, - int num_pixels, uint8_t* dst) { +void VP8LConvertBGRAToRGB565_C(const uint32_t* src, + int num_pixels, uint8_t* dst) { const uint32_t* const src_end = src + num_pixels; while (src < src_end) { const uint32_t argb = *src++; - *dst++ = ((argb >> 16) & 0xf8) | ((argb >> 13) & 0x7); - *dst++ = ((argb >> 5) & 0xe0) | ((argb >> 3) & 0x1f); + const uint8_t rg = ((argb >> 16) & 0xf8) | ((argb >> 13) & 0x7); + const uint8_t gb = ((argb >> 5) & 0xe0) | ((argb >> 3) & 0x1f); +#ifdef WEBP_SWAP_16BIT_CSP + *dst++ = gb; + *dst++ = rg; +#else + *dst++ = rg; + *dst++ = gb; +#endif } } -static void ConvertBGRAToBGR(const uint32_t* src, - int num_pixels, uint8_t* dst) { +void VP8LConvertBGRAToBGR_C(const uint32_t* src, + int num_pixels, uint8_t* dst) { const uint32_t* const src_end = src + num_pixels; while (src < src_end) { const uint32_t argb = *src++; @@ -1065,21 +486,24 @@ static void CopyOrSwap(const uint32_t* src, int num_pixels, uint8_t* dst, if (is_big_endian() == swap_on_big_endian) { const uint32_t* const src_end = src + num_pixels; while (src < src_end) { - uint32_t argb = *src++; -#if !defined(__BIG_ENDIAN__) && (defined(__i386__) || defined(__x86_64__)) - __asm__ volatile("bswap %0" : "=r"(argb) : "0"(argb)); - *(uint32_t*)dst = argb; - dst += sizeof(argb); -#elif !defined(__BIG_ENDIAN__) && defined(_MSC_VER) - argb = _byteswap_ulong(argb); - *(uint32_t*)dst = argb; - dst += sizeof(argb); -#else - *dst++ = (argb >> 24) & 0xff; - *dst++ = (argb >> 16) & 0xff; - *dst++ = (argb >> 8) & 0xff; - *dst++ = (argb >> 0) & 0xff; + const uint32_t argb = *src++; + +#if !defined(WORDS_BIGENDIAN) +#if !defined(WEBP_REFERENCE_IMPLEMENTATION) + *(uint32_t*)dst = BSwap32(argb); +#else // WEBP_REFERENCE_IMPLEMENTATION + dst[0] = (argb >> 24) & 0xff; + dst[1] = (argb >> 16) & 0xff; + dst[2] = (argb >> 8) & 0xff; + dst[3] = (argb >> 0) & 0xff; #endif +#else // WORDS_BIGENDIAN + dst[0] = (argb >> 0) & 0xff; + dst[1] = (argb >> 8) & 0xff; + dst[2] = (argb >> 16) & 0xff; + dst[3] = (argb >> 24) & 0xff; +#endif + dst += sizeof(argb); } } else { memcpy(dst, src, num_pixels * sizeof(*src)); @@ -1090,17 +514,17 @@ void VP8LConvertFromBGRA(const uint32_t* const in_data, int num_pixels, WEBP_CSP_MODE out_colorspace, uint8_t* const rgba) { switch (out_colorspace) { case MODE_RGB: - ConvertBGRAToRGB(in_data, num_pixels, rgba); + VP8LConvertBGRAToRGB(in_data, num_pixels, rgba); break; case MODE_RGBA: - ConvertBGRAToRGBA(in_data, num_pixels, rgba); + VP8LConvertBGRAToRGBA(in_data, num_pixels, rgba); break; case MODE_rgbA: - ConvertBGRAToRGBA(in_data, num_pixels, rgba); + VP8LConvertBGRAToRGBA(in_data, num_pixels, rgba); WebPApplyAlphaMultiply(rgba, 0, num_pixels, 1, 0); break; case MODE_BGR: - ConvertBGRAToBGR(in_data, num_pixels, rgba); + VP8LConvertBGRAToBGR(in_data, num_pixels, rgba); break; case MODE_BGRA: CopyOrSwap(in_data, num_pixels, rgba, 1); @@ -1117,14 +541,14 @@ void VP8LConvertFromBGRA(const uint32_t* const in_data, int num_pixels, WebPApplyAlphaMultiply(rgba, 1, num_pixels, 1, 0); break; case MODE_RGBA_4444: - ConvertBGRAToRGBA4444(in_data, num_pixels, rgba); + VP8LConvertBGRAToRGBA4444(in_data, num_pixels, rgba); break; case MODE_rgbA_4444: - ConvertBGRAToRGBA4444(in_data, num_pixels, rgba); + VP8LConvertBGRAToRGBA4444(in_data, num_pixels, rgba); WebPApplyAlphaMultiply4444(rgba, num_pixels, 1, 0); break; case MODE_RGB_565: - ConvertBGRAToRGB565(in_data, num_pixels, rgba); + VP8LConvertBGRAToRGB565(in_data, num_pixels, rgba); break; default: assert(0); // Code flow should not reach here. @@ -1133,6 +557,79 @@ void VP8LConvertFromBGRA(const uint32_t* const in_data, int num_pixels, //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" +VP8LProcessBlueAndRedFunc VP8LAddGreenToBlueAndRed; +VP8LPredictorFunc VP8LPredictors[16]; + +VP8LTransformColorFunc VP8LTransformColorInverse; + +VP8LConvertFunc VP8LConvertBGRAToRGB; +VP8LConvertFunc VP8LConvertBGRAToRGBA; +VP8LConvertFunc VP8LConvertBGRAToRGBA4444; +VP8LConvertFunc VP8LConvertBGRAToRGB565; +VP8LConvertFunc VP8LConvertBGRAToBGR; + +VP8LMapARGBFunc VP8LMapColor32b; +VP8LMapAlphaFunc VP8LMapColor8b; + +extern void VP8LDspInitSSE2(void); +extern void VP8LDspInitNEON(void); +extern void VP8LDspInitMIPSdspR2(void); + +static volatile VP8CPUInfo lossless_last_cpuinfo_used = + (VP8CPUInfo)&lossless_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInit(void) { + if (lossless_last_cpuinfo_used == VP8GetCPUInfo) return; + + VP8LPredictors[0] = Predictor0; + VP8LPredictors[1] = Predictor1; + VP8LPredictors[2] = Predictor2; + VP8LPredictors[3] = Predictor3; + VP8LPredictors[4] = Predictor4; + VP8LPredictors[5] = Predictor5; + VP8LPredictors[6] = Predictor6; + VP8LPredictors[7] = Predictor7; + VP8LPredictors[8] = Predictor8; + VP8LPredictors[9] = Predictor9; + VP8LPredictors[10] = Predictor10; + VP8LPredictors[11] = Predictor11; + VP8LPredictors[12] = Predictor12; + VP8LPredictors[13] = Predictor13; + VP8LPredictors[14] = Predictor0; // <- padding security sentinels + VP8LPredictors[15] = Predictor0; + + VP8LAddGreenToBlueAndRed = VP8LAddGreenToBlueAndRed_C; + + VP8LTransformColorInverse = VP8LTransformColorInverse_C; + + VP8LConvertBGRAToRGB = VP8LConvertBGRAToRGB_C; + VP8LConvertBGRAToRGBA = VP8LConvertBGRAToRGBA_C; + VP8LConvertBGRAToRGBA4444 = VP8LConvertBGRAToRGBA4444_C; + VP8LConvertBGRAToRGB565 = VP8LConvertBGRAToRGB565_C; + VP8LConvertBGRAToBGR = VP8LConvertBGRAToBGR_C; + + VP8LMapColor32b = MapARGB; + VP8LMapColor8b = MapAlpha; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + VP8LDspInitSSE2(); + } +#endif +#if defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + VP8LDspInitNEON(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + VP8LDspInitMIPSdspR2(); + } #endif + } + lossless_last_cpuinfo_used = VP8GetCPUInfo; +} + +//------------------------------------------------------------------------------ diff --git a/drivers/webp/dsp/lossless.h b/drivers/webp/dsp/lossless.h index 7c7d5555ed..ee6771333f 100644 --- a/drivers/webp/dsp/lossless.h +++ b/drivers/webp/dsp/lossless.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Image transforms and color space conversion methods for lossless decoder. @@ -13,15 +15,42 @@ #ifndef WEBP_DSP_LOSSLESS_H_ #define WEBP_DSP_LOSSLESS_H_ -#include "../types.h" -#include "../decode.h" +#include "../webp/types.h" +#include "../webp/decode.h" -#if defined(__cplusplus) || defined(c_plusplus) +#include "../enc/histogram.h" +#include "../utils/utils.h" + +#ifdef __cplusplus extern "C" { #endif +#ifdef WEBP_EXPERIMENTAL_FEATURES +#include "../enc/delta_palettization.h" +#endif // WEBP_EXPERIMENTAL_FEATURES + +// Not a trivial literal symbol. +#define VP8L_NON_TRIVIAL_SYM (0xffffffff) + //------------------------------------------------------------------------------ -// Image transforms. +// Decoding + +typedef uint32_t (*VP8LPredictorFunc)(uint32_t left, const uint32_t* const top); +extern VP8LPredictorFunc VP8LPredictors[16]; + +typedef void (*VP8LProcessBlueAndRedFunc)(uint32_t* argb_data, int num_pixels); +extern VP8LProcessBlueAndRedFunc VP8LAddGreenToBlueAndRed; + +typedef struct { + // Note: the members are uint8_t, so that any negative values are + // automatically converted to "mod 256" values. + uint8_t green_to_red_; + uint8_t green_to_blue_; + uint8_t red_to_blue_; +} VP8LMultipliers; +typedef void (*VP8LTransformColorFunc)(const VP8LMultipliers* const m, + uint32_t* argb_data, int num_pixels); +extern VP8LTransformColorFunc VP8LTransformColorInverse; struct VP8LTransform; // Defined in dec/vp8li.h. @@ -33,23 +62,110 @@ void VP8LInverseTransform(const struct VP8LTransform* const transform, int row_start, int row_end, const uint32_t* const in, uint32_t* const out); -// Subtracts green from blue and red channels. -void VP8LSubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixs); - -void VP8LResidualImage(int width, int height, int bits, - uint32_t* const argb, uint32_t* const argb_scratch, - uint32_t* const image); - -void VP8LColorSpaceTransform(int width, int height, int bits, int step, - uint32_t* const argb, uint32_t* image); - -//------------------------------------------------------------------------------ // Color space conversion. +typedef void (*VP8LConvertFunc)(const uint32_t* src, int num_pixels, + uint8_t* dst); +extern VP8LConvertFunc VP8LConvertBGRAToRGB; +extern VP8LConvertFunc VP8LConvertBGRAToRGBA; +extern VP8LConvertFunc VP8LConvertBGRAToRGBA4444; +extern VP8LConvertFunc VP8LConvertBGRAToRGB565; +extern VP8LConvertFunc VP8LConvertBGRAToBGR; // Converts from BGRA to other color spaces. void VP8LConvertFromBGRA(const uint32_t* const in_data, int num_pixels, WEBP_CSP_MODE out_colorspace, uint8_t* const rgba); +// color mapping related functions. +static WEBP_INLINE uint32_t VP8GetARGBIndex(uint32_t idx) { + return (idx >> 8) & 0xff; +} + +static WEBP_INLINE uint8_t VP8GetAlphaIndex(uint8_t idx) { + return idx; +} + +static WEBP_INLINE uint32_t VP8GetARGBValue(uint32_t val) { + return val; +} + +static WEBP_INLINE uint8_t VP8GetAlphaValue(uint32_t val) { + return (val >> 8) & 0xff; +} + +typedef void (*VP8LMapARGBFunc)(const uint32_t* src, + const uint32_t* const color_map, + uint32_t* dst, int y_start, + int y_end, int width); +typedef void (*VP8LMapAlphaFunc)(const uint8_t* src, + const uint32_t* const color_map, + uint8_t* dst, int y_start, + int y_end, int width); + +extern VP8LMapARGBFunc VP8LMapColor32b; +extern VP8LMapAlphaFunc VP8LMapColor8b; + +// Similar to the static method ColorIndexInverseTransform() that is part of +// lossless.c, but used only for alpha decoding. It takes uint8_t (rather than +// uint32_t) arguments for 'src' and 'dst'. +void VP8LColorIndexInverseTransformAlpha( + const struct VP8LTransform* const transform, int y_start, int y_end, + const uint8_t* src, uint8_t* dst); + +// Expose some C-only fallback functions +void VP8LTransformColorInverse_C(const VP8LMultipliers* const m, + uint32_t* data, int num_pixels); + +void VP8LConvertBGRAToRGB_C(const uint32_t* src, int num_pixels, uint8_t* dst); +void VP8LConvertBGRAToRGBA_C(const uint32_t* src, int num_pixels, uint8_t* dst); +void VP8LConvertBGRAToRGBA4444_C(const uint32_t* src, + int num_pixels, uint8_t* dst); +void VP8LConvertBGRAToRGB565_C(const uint32_t* src, + int num_pixels, uint8_t* dst); +void VP8LConvertBGRAToBGR_C(const uint32_t* src, int num_pixels, uint8_t* dst); +void VP8LAddGreenToBlueAndRed_C(uint32_t* data, int num_pixels); + +// Must be called before calling any of the above methods. +void VP8LDspInit(void); + +//------------------------------------------------------------------------------ +// Encoding + +extern VP8LProcessBlueAndRedFunc VP8LSubtractGreenFromBlueAndRed; +extern VP8LTransformColorFunc VP8LTransformColor; +typedef void (*VP8LCollectColorBlueTransformsFunc)( + const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_blue, int red_to_blue, int histo[]); +extern VP8LCollectColorBlueTransformsFunc VP8LCollectColorBlueTransforms; + +typedef void (*VP8LCollectColorRedTransformsFunc)( + const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_red, int histo[]); +extern VP8LCollectColorRedTransformsFunc VP8LCollectColorRedTransforms; + +// Expose some C-only fallback functions +void VP8LTransformColor_C(const VP8LMultipliers* const m, + uint32_t* data, int num_pixels); +void VP8LSubtractGreenFromBlueAndRed_C(uint32_t* argb_data, int num_pixels); +void VP8LCollectColorRedTransforms_C(const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_red, int histo[]); +void VP8LCollectColorBlueTransforms_C(const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_blue, int red_to_blue, + int histo[]); + +//------------------------------------------------------------------------------ +// Image transforms. + +void VP8LResidualImage(int width, int height, int bits, int low_effort, + uint32_t* const argb, uint32_t* const argb_scratch, + uint32_t* const image); + +void VP8LColorSpaceTransform(int width, int height, int bits, int quality, + uint32_t* const argb, uint32_t* image); + //------------------------------------------------------------------------------ // Misc methods. @@ -59,10 +175,136 @@ static WEBP_INLINE uint32_t VP8LSubSampleSize(uint32_t size, return (size + (1 << sampling_bits) - 1) >> sampling_bits; } -// Faster logarithm for integers, with the property of log2(0) == 0. -float VP8LFastLog2(int v); +// ----------------------------------------------------------------------------- +// Faster logarithm for integers. Small values use a look-up table. +#define LOG_LOOKUP_IDX_MAX 256 +extern const float kLog2Table[LOG_LOOKUP_IDX_MAX]; +extern const float kSLog2Table[LOG_LOOKUP_IDX_MAX]; +typedef float (*VP8LFastLog2SlowFunc)(uint32_t v); + +extern VP8LFastLog2SlowFunc VP8LFastLog2Slow; +extern VP8LFastLog2SlowFunc VP8LFastSLog2Slow; + +static WEBP_INLINE float VP8LFastLog2(uint32_t v) { + return (v < LOG_LOOKUP_IDX_MAX) ? kLog2Table[v] : VP8LFastLog2Slow(v); +} // Fast calculation of v * log2(v) for integer input. -static WEBP_INLINE float VP8LFastSLog2(int v) { return VP8LFastLog2(v) * v; } +static WEBP_INLINE float VP8LFastSLog2(uint32_t v) { + return (v < LOG_LOOKUP_IDX_MAX) ? kSLog2Table[v] : VP8LFastSLog2Slow(v); +} + +// ----------------------------------------------------------------------------- +// Huffman-cost related functions. + +typedef double (*VP8LCostFunc)(const uint32_t* population, int length); +typedef double (*VP8LCostCombinedFunc)(const uint32_t* X, const uint32_t* Y, + int length); + +extern VP8LCostFunc VP8LExtraCost; +extern VP8LCostCombinedFunc VP8LExtraCostCombined; + +typedef struct { // small struct to hold counters + int counts[2]; // index: 0=zero steak, 1=non-zero streak + int streaks[2][2]; // [zero/non-zero][streak<3 / streak>=3] +} VP8LStreaks; + +typedef VP8LStreaks (*VP8LCostCountFunc)(const uint32_t* population, + int length); +typedef VP8LStreaks (*VP8LCostCombinedCountFunc)(const uint32_t* X, + const uint32_t* Y, int length); + +extern VP8LCostCountFunc VP8LHuffmanCostCount; +extern VP8LCostCombinedCountFunc VP8LHuffmanCostCombinedCount; + +// Get the symbol entropy for the distribution 'population'. +// Set 'trivial_sym', if there's only one symbol present in the distribution. +double VP8LPopulationCost(const uint32_t* const population, int length, + uint32_t* const trivial_sym); + +// Get the combined symbol entropy for the distributions 'X' and 'Y'. +double VP8LGetCombinedEntropy(const uint32_t* const X, + const uint32_t* const Y, int length); + +double VP8LBitsEntropy(const uint32_t* const array, int n, + uint32_t* const trivial_symbol); + +// Estimate how many bits the combined entropy of literals and distance +// approximately maps to. +double VP8LHistogramEstimateBits(const VP8LHistogram* const p); + +// This function estimates the cost in bits excluding the bits needed to +// represent the entropy code itself. +double VP8LHistogramEstimateBitsBulk(const VP8LHistogram* const p); + +typedef void (*VP8LHistogramAddFunc)(const VP8LHistogram* const a, + const VP8LHistogram* const b, + VP8LHistogram* const out); +extern VP8LHistogramAddFunc VP8LHistogramAdd; + +// ----------------------------------------------------------------------------- +// PrefixEncode() + +static WEBP_INLINE int VP8LBitsLog2Ceiling(uint32_t n) { + const int log_floor = BitsLog2Floor(n); + if (n == (n & ~(n - 1))) // zero or a power of two. + return log_floor; + else + return log_floor + 1; +} + +// Splitting of distance and length codes into prefixes and +// extra bits. The prefixes are encoded with an entropy code +// while the extra bits are stored just as normal bits. +static WEBP_INLINE void VP8LPrefixEncodeBitsNoLUT(int distance, int* const code, + int* const extra_bits) { + const int highest_bit = BitsLog2Floor(--distance); + const int second_highest_bit = (distance >> (highest_bit - 1)) & 1; + *extra_bits = highest_bit - 1; + *code = 2 * highest_bit + second_highest_bit; +} + +static WEBP_INLINE void VP8LPrefixEncodeNoLUT(int distance, int* const code, + int* const extra_bits, + int* const extra_bits_value) { + const int highest_bit = BitsLog2Floor(--distance); + const int second_highest_bit = (distance >> (highest_bit - 1)) & 1; + *extra_bits = highest_bit - 1; + *extra_bits_value = distance & ((1 << *extra_bits) - 1); + *code = 2 * highest_bit + second_highest_bit; +} + +#define PREFIX_LOOKUP_IDX_MAX 512 +typedef struct { + int8_t code_; + int8_t extra_bits_; +} VP8LPrefixCode; + +// These tables are derived using VP8LPrefixEncodeNoLUT. +extern const VP8LPrefixCode kPrefixEncodeCode[PREFIX_LOOKUP_IDX_MAX]; +extern const uint8_t kPrefixEncodeExtraBitsValue[PREFIX_LOOKUP_IDX_MAX]; +static WEBP_INLINE void VP8LPrefixEncodeBits(int distance, int* const code, + int* const extra_bits) { + if (distance < PREFIX_LOOKUP_IDX_MAX) { + const VP8LPrefixCode prefix_code = kPrefixEncodeCode[distance]; + *code = prefix_code.code_; + *extra_bits = prefix_code.extra_bits_; + } else { + VP8LPrefixEncodeBitsNoLUT(distance, code, extra_bits); + } +} + +static WEBP_INLINE void VP8LPrefixEncode(int distance, int* const code, + int* const extra_bits, + int* const extra_bits_value) { + if (distance < PREFIX_LOOKUP_IDX_MAX) { + const VP8LPrefixCode prefix_code = kPrefixEncodeCode[distance]; + *code = prefix_code.code_; + *extra_bits = prefix_code.extra_bits_; + *extra_bits_value = kPrefixEncodeExtraBitsValue[distance]; + } else { + VP8LPrefixEncodeNoLUT(distance, code, extra_bits, extra_bits_value); + } +} // In-place difference of each component with mod 256. static WEBP_INLINE uint32_t VP8LSubPixels(uint32_t a, uint32_t b) { @@ -73,9 +315,15 @@ static WEBP_INLINE uint32_t VP8LSubPixels(uint32_t a, uint32_t b) { return (alpha_and_green & 0xff00ff00u) | (red_and_blue & 0x00ff00ffu); } +void VP8LBundleColorMap(const uint8_t* const row, int width, + int xbits, uint32_t* const dst); + +// Must be called before calling any of the above methods. +void VP8LEncDspInit(void); + //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/dsp/upsampling.c b/drivers/webp/dsp/upsampling.c index 4855eb1432..651274fcee 100644 --- a/drivers/webp/dsp/upsampling.c +++ b/drivers/webp/dsp/upsampling.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // YUV to RGB upsampling functions. @@ -12,9 +14,7 @@ #include "./dsp.h" #include "./yuv.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include <assert.h> //------------------------------------------------------------------------------ // Fancy upsampler @@ -32,7 +32,7 @@ WebPUpsampleLinePairFunc WebPUpsamplers[MODE_LAST]; // ([3*a + b + 9*c + 3*d a + 3*b + 3*c + 9*d] [8 8]) / 16 // We process u and v together stashed into 32bit (16bit each). -#define LOAD_UV(u,v) ((u) | ((v) << 16)) +#define LOAD_UV(u, v) ((u) | ((v) << 16)) #define UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ @@ -43,11 +43,12 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ const int last_pixel_pair = (len - 1) >> 1; \ uint32_t tl_uv = LOAD_UV(top_u[0], top_v[0]); /* top-left sample */ \ uint32_t l_uv = LOAD_UV(cur_u[0], cur_v[0]); /* left-sample */ \ - if (top_y) { \ + assert(top_y != NULL); \ + { \ const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ FUNC(top_y[0], uv0 & 0xff, (uv0 >> 16), top_dst); \ } \ - if (bottom_y) { \ + if (bottom_y != NULL) { \ const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ FUNC(bottom_y[0], uv0 & 0xff, (uv0 >> 16), bottom_dst); \ } \ @@ -58,7 +59,7 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ const uint32_t avg = tl_uv + t_uv + l_uv + uv + 0x00080008u; \ const uint32_t diag_12 = (avg + 2 * (t_uv + l_uv)) >> 3; \ const uint32_t diag_03 = (avg + 2 * (tl_uv + uv)) >> 3; \ - if (top_y) { \ + { \ const uint32_t uv0 = (diag_12 + tl_uv) >> 1; \ const uint32_t uv1 = (diag_03 + t_uv) >> 1; \ FUNC(top_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ @@ -66,7 +67,7 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ FUNC(top_y[2 * x - 0], uv1 & 0xff, (uv1 >> 16), \ top_dst + (2 * x - 0) * XSTEP); \ } \ - if (bottom_y) { \ + if (bottom_y != NULL) { \ const uint32_t uv0 = (diag_03 + l_uv) >> 1; \ const uint32_t uv1 = (diag_12 + uv) >> 1; \ FUNC(bottom_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ @@ -78,12 +79,12 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ l_uv = uv; \ } \ if (!(len & 1)) { \ - if (top_y) { \ + { \ const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ FUNC(top_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ top_dst + (len - 1) * XSTEP); \ } \ - if (bottom_y) { \ + if (bottom_y != NULL) { \ const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ FUNC(bottom_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ bottom_dst + (len - 1) * XSTEP); \ @@ -106,57 +107,6 @@ UPSAMPLE_FUNC(UpsampleRgb565LinePair, VP8YuvToRgb565, 2) #endif // FANCY_UPSAMPLING //------------------------------------------------------------------------------ -// simple point-sampling - -#define SAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ -static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ - const uint8_t* u, const uint8_t* v, \ - uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ - int i; \ - for (i = 0; i < len - 1; i += 2) { \ - FUNC(top_y[0], u[0], v[0], top_dst); \ - FUNC(top_y[1], u[0], v[0], top_dst + XSTEP); \ - FUNC(bottom_y[0], u[0], v[0], bottom_dst); \ - FUNC(bottom_y[1], u[0], v[0], bottom_dst + XSTEP); \ - top_y += 2; \ - bottom_y += 2; \ - u++; \ - v++; \ - top_dst += 2 * XSTEP; \ - bottom_dst += 2 * XSTEP; \ - } \ - if (i == len - 1) { /* last one */ \ - FUNC(top_y[0], u[0], v[0], top_dst); \ - FUNC(bottom_y[0], u[0], v[0], bottom_dst); \ - } \ -} - -// All variants implemented. -SAMPLE_FUNC(SampleRgbLinePair, VP8YuvToRgb, 3) -SAMPLE_FUNC(SampleBgrLinePair, VP8YuvToBgr, 3) -SAMPLE_FUNC(SampleRgbaLinePair, VP8YuvToRgba, 4) -SAMPLE_FUNC(SampleBgraLinePair, VP8YuvToBgra, 4) -SAMPLE_FUNC(SampleArgbLinePair, VP8YuvToArgb, 4) -SAMPLE_FUNC(SampleRgba4444LinePair, VP8YuvToRgba4444, 2) -SAMPLE_FUNC(SampleRgb565LinePair, VP8YuvToRgb565, 2) - -#undef SAMPLE_FUNC - -const WebPSampleLinePairFunc WebPSamplers[MODE_LAST] = { - SampleRgbLinePair, // MODE_RGB - SampleRgbaLinePair, // MODE_RGBA - SampleBgrLinePair, // MODE_BGR - SampleBgraLinePair, // MODE_BGRA - SampleArgbLinePair, // MODE_ARGB - SampleRgba4444LinePair, // MODE_RGBA_4444 - SampleRgb565LinePair, // MODE_RGB_565 - SampleRgbaLinePair, // MODE_rgbA - SampleBgraLinePair, // MODE_bgrA - SampleArgbLinePair, // MODE_Argb - SampleRgba4444LinePair // MODE_rgbA_4444 -}; - -//------------------------------------------------------------------------------ #if !defined(FANCY_UPSAMPLING) #define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC) \ @@ -166,7 +116,8 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bot_y, \ uint8_t* top_dst, uint8_t* bot_dst, int len) { \ const int half_len = len >> 1; \ int x; \ - if (top_dst != NULL) { \ + assert(top_dst != NULL); \ + { \ for (x = 0; x < half_len; ++x) { \ FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x + 0); \ FUNC(top_y[2 * x + 1], top_u[x], top_v[x], top_dst + 8 * x + 4); \ @@ -202,116 +153,75 @@ WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last) { // YUV444 converter #define YUV444_FUNC(FUNC_NAME, FUNC, XSTEP) \ -static void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ - uint8_t* dst, int len) { \ +extern void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len); \ +void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len) { \ int i; \ for (i = 0; i < len; ++i) FUNC(y[i], u[i], v[i], &dst[i * XSTEP]); \ } -YUV444_FUNC(Yuv444ToRgb, VP8YuvToRgb, 3) -YUV444_FUNC(Yuv444ToBgr, VP8YuvToBgr, 3) -YUV444_FUNC(Yuv444ToRgba, VP8YuvToRgba, 4) -YUV444_FUNC(Yuv444ToBgra, VP8YuvToBgra, 4) -YUV444_FUNC(Yuv444ToArgb, VP8YuvToArgb, 4) -YUV444_FUNC(Yuv444ToRgba4444, VP8YuvToRgba4444, 2) -YUV444_FUNC(Yuv444ToRgb565, VP8YuvToRgb565, 2) +YUV444_FUNC(WebPYuv444ToRgbC, VP8YuvToRgb, 3) +YUV444_FUNC(WebPYuv444ToBgrC, VP8YuvToBgr, 3) +YUV444_FUNC(WebPYuv444ToRgbaC, VP8YuvToRgba, 4) +YUV444_FUNC(WebPYuv444ToBgraC, VP8YuvToBgra, 4) +YUV444_FUNC(WebPYuv444ToArgbC, VP8YuvToArgb, 4) +YUV444_FUNC(WebPYuv444ToRgba4444C, VP8YuvToRgba4444, 2) +YUV444_FUNC(WebPYuv444ToRgb565C, VP8YuvToRgb565, 2) #undef YUV444_FUNC -const WebPYUV444Converter WebPYUV444Converters[MODE_LAST] = { - Yuv444ToRgb, // MODE_RGB - Yuv444ToRgba, // MODE_RGBA - Yuv444ToBgr, // MODE_BGR - Yuv444ToBgra, // MODE_BGRA - Yuv444ToArgb, // MODE_ARGB - Yuv444ToRgba4444, // MODE_RGBA_4444 - Yuv444ToRgb565, // MODE_RGB_565 - Yuv444ToRgba, // MODE_rgbA - Yuv444ToBgra, // MODE_bgrA - Yuv444ToArgb, // MODE_Argb - Yuv444ToRgba4444 // MODE_rgbA_4444 -}; - -//------------------------------------------------------------------------------ -// Premultiplied modes - -// non dithered-modes - -// (x * a * 32897) >> 23 is bit-wise equivalent to (int)(x * a / 255.) -// for all 8bit x or a. For bit-wise equivalence to (int)(x * a / 255. + .5), -// one can use instead: (x * a * 65793 + (1 << 23)) >> 24 -#if 1 // (int)(x * a / 255.) -#define MULTIPLIER(a) ((a) * 32897UL) -#define PREMULTIPLY(x, m) (((x) * (m)) >> 23) -#else // (int)(x * a / 255. + .5) -#define MULTIPLIER(a) ((a) * 65793UL) -#define PREMULTIPLY(x, m) (((x) * (m) + (1UL << 23)) >> 24) -#endif - -static void ApplyAlphaMultiply(uint8_t* rgba, int alpha_first, - int w, int h, int stride) { - while (h-- > 0) { - uint8_t* const rgb = rgba + (alpha_first ? 1 : 0); - const uint8_t* const alpha = rgba + (alpha_first ? 0 : 3); - int i; - for (i = 0; i < w; ++i) { - const uint32_t a = alpha[4 * i]; - if (a != 0xff) { - const uint32_t mult = MULTIPLIER(a); - rgb[4 * i + 0] = PREMULTIPLY(rgb[4 * i + 0], mult); - rgb[4 * i + 1] = PREMULTIPLY(rgb[4 * i + 1], mult); - rgb[4 * i + 2] = PREMULTIPLY(rgb[4 * i + 2], mult); - } - } - rgba += stride; - } -} -#undef MULTIPLIER -#undef PREMULTIPLY - -// rgbA4444 +WebPYUV444Converter WebPYUV444Converters[MODE_LAST]; -#define MULTIPLIER(a) ((a) * 0x1111) // 0x1111 ~= (1 << 16) / 15 +extern void WebPInitYUV444ConvertersMIPSdspR2(void); +extern void WebPInitYUV444ConvertersSSE2(void); -static WEBP_INLINE uint8_t dither_hi(uint8_t x) { - return (x & 0xf0) | (x >> 4); -} +static volatile VP8CPUInfo upsampling_last_cpuinfo_used1 = + (VP8CPUInfo)&upsampling_last_cpuinfo_used1; -static WEBP_INLINE uint8_t dither_lo(uint8_t x) { - return (x & 0x0f) | (x << 4); -} +WEBP_TSAN_IGNORE_FUNCTION void WebPInitYUV444Converters(void) { + if (upsampling_last_cpuinfo_used1 == VP8GetCPUInfo) return; -static WEBP_INLINE uint8_t multiply(uint8_t x, uint32_t m) { - return (x * m) >> 16; -} + WebPYUV444Converters[MODE_RGB] = WebPYuv444ToRgbC; + WebPYUV444Converters[MODE_RGBA] = WebPYuv444ToRgbaC; + WebPYUV444Converters[MODE_BGR] = WebPYuv444ToBgrC; + WebPYUV444Converters[MODE_BGRA] = WebPYuv444ToBgraC; + WebPYUV444Converters[MODE_ARGB] = WebPYuv444ToArgbC; + WebPYUV444Converters[MODE_RGBA_4444] = WebPYuv444ToRgba4444C; + WebPYUV444Converters[MODE_RGB_565] = WebPYuv444ToRgb565C; + WebPYUV444Converters[MODE_rgbA] = WebPYuv444ToRgbaC; + WebPYUV444Converters[MODE_bgrA] = WebPYuv444ToBgraC; + WebPYUV444Converters[MODE_Argb] = WebPYuv444ToArgbC; + WebPYUV444Converters[MODE_rgbA_4444] = WebPYuv444ToRgba4444C; -static void ApplyAlphaMultiply4444(uint8_t* rgba4444, - int w, int h, int stride) { - while (h-- > 0) { - int i; - for (i = 0; i < w; ++i) { - const uint8_t a = (rgba4444[2 * i + 1] & 0x0f); - const uint32_t mult = MULTIPLIER(a); - const uint8_t r = multiply(dither_hi(rgba4444[2 * i + 0]), mult); - const uint8_t g = multiply(dither_lo(rgba4444[2 * i + 0]), mult); - const uint8_t b = multiply(dither_hi(rgba4444[2 * i + 1]), mult); - rgba4444[2 * i + 0] = (r & 0xf0) | ((g >> 4) & 0x0f); - rgba4444[2 * i + 1] = (b & 0xf0) | a; + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitYUV444ConvertersSSE2(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + WebPInitYUV444ConvertersMIPSdspR2(); } - rgba4444 += stride; +#endif } + upsampling_last_cpuinfo_used1 = VP8GetCPUInfo; } -#undef MULTIPLIER - -void (*WebPApplyAlphaMultiply)(uint8_t*, int, int, int, int) - = ApplyAlphaMultiply; -void (*WebPApplyAlphaMultiply4444)(uint8_t*, int, int, int) - = ApplyAlphaMultiply4444; //------------------------------------------------------------------------------ -// Main call +// Main calls + +extern void WebPInitUpsamplersSSE2(void); +extern void WebPInitUpsamplersNEON(void); +extern void WebPInitUpsamplersMIPSdspR2(void); + +static volatile VP8CPUInfo upsampling_last_cpuinfo_used2 = + (VP8CPUInfo)&upsampling_last_cpuinfo_used2; + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplers(void) { + if (upsampling_last_cpuinfo_used2 == VP8GetCPUInfo) return; -void WebPInitUpsamplers(void) { #ifdef FANCY_UPSAMPLING WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair; WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair; @@ -320,38 +230,31 @@ void WebPInitUpsamplers(void) { WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair; WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair; WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair; - - // If defined, use CPUInfo() to overwrite some pointers with faster versions. - if (VP8GetCPUInfo != NULL) { -#if defined(WEBP_USE_SSE2) - if (VP8GetCPUInfo(kSSE2)) { - WebPInitUpsamplersSSE2(); - } -#endif - } -#endif // FANCY_UPSAMPLING -} - -void WebPInitPremultiply(void) { - WebPApplyAlphaMultiply = ApplyAlphaMultiply; - WebPApplyAlphaMultiply4444 = ApplyAlphaMultiply4444; - -#ifdef FANCY_UPSAMPLING WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair; WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair; + // If defined, use CPUInfo() to overwrite some pointers with faster versions. if (VP8GetCPUInfo != NULL) { #if defined(WEBP_USE_SSE2) if (VP8GetCPUInfo(kSSE2)) { - WebPInitPremultiplySSE2(); + WebPInitUpsamplersSSE2(); + } +#endif +#if defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + WebPInitUpsamplersNEON(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + WebPInitUpsamplersMIPSdspR2(); } #endif } #endif // FANCY_UPSAMPLING + upsampling_last_cpuinfo_used2 = VP8GetCPUInfo; } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif +//------------------------------------------------------------------------------ diff --git a/drivers/webp/dsp/upsampling_sse2.c b/drivers/webp/dsp/upsampling_sse2.c index 8cb275a02b..b85808e271 100644 --- a/drivers/webp/dsp/upsampling_sse2.c +++ b/drivers/webp/dsp/upsampling_sse2.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // SSE2 version of YUV to RGB upsampling functions. @@ -18,10 +20,6 @@ #include <string.h> #include "./yuv.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - #ifdef FANCY_UPSAMPLING // We compute (9*a + 3*b + 3*c + d + 8) / 16 as follows @@ -49,23 +47,23 @@ extern "C" { (out) = _mm_sub_epi8(tmp0, tmp4); /* (k + in + 1) / 2 - lsb_correction */ \ } while (0) -// pack and store two alterning pixel rows +// pack and store two alternating pixel rows #define PACK_AND_STORE(a, b, da, db, out) do { \ - const __m128i ta = _mm_avg_epu8(a, da); /* (9a + 3b + 3c + d + 8) / 16 */ \ - const __m128i tb = _mm_avg_epu8(b, db); /* (3a + 9b + c + 3d + 8) / 16 */ \ - const __m128i t1 = _mm_unpacklo_epi8(ta, tb); \ - const __m128i t2 = _mm_unpackhi_epi8(ta, tb); \ - _mm_store_si128(((__m128i*)(out)) + 0, t1); \ - _mm_store_si128(((__m128i*)(out)) + 1, t2); \ + const __m128i t_a = _mm_avg_epu8(a, da); /* (9a + 3b + 3c + d + 8) / 16 */ \ + const __m128i t_b = _mm_avg_epu8(b, db); /* (3a + 9b + c + 3d + 8) / 16 */ \ + const __m128i t_1 = _mm_unpacklo_epi8(t_a, t_b); \ + const __m128i t_2 = _mm_unpackhi_epi8(t_a, t_b); \ + _mm_store_si128(((__m128i*)(out)) + 0, t_1); \ + _mm_store_si128(((__m128i*)(out)) + 1, t_2); \ } while (0) // Loads 17 pixels each from rows r1 and r2 and generates 32 pixels. #define UPSAMPLE_32PIXELS(r1, r2, out) { \ const __m128i one = _mm_set1_epi8(1); \ - const __m128i a = _mm_loadu_si128((__m128i*)&(r1)[0]); \ - const __m128i b = _mm_loadu_si128((__m128i*)&(r1)[1]); \ - const __m128i c = _mm_loadu_si128((__m128i*)&(r2)[0]); \ - const __m128i d = _mm_loadu_si128((__m128i*)&(r2)[1]); \ + const __m128i a = _mm_loadu_si128((const __m128i*)&(r1)[0]); \ + const __m128i b = _mm_loadu_si128((const __m128i*)&(r1)[1]); \ + const __m128i c = _mm_loadu_si128((const __m128i*)&(r2)[0]); \ + const __m128i d = _mm_loadu_si128((const __m128i*)&(r2)[1]); \ \ const __m128i s = _mm_avg_epu8(a, d); /* s = (a + d + 1) / 2 */ \ const __m128i t = _mm_avg_epu8(b, c); /* t = (b + c + 1) / 2 */ \ @@ -85,8 +83,8 @@ extern "C" { GET_M(ad, s, diag2); /* diag2 = (3a + b + c + 3d) / 8 */ \ \ /* pack the alternate pixels */ \ - PACK_AND_STORE(a, b, diag1, diag2, &(out)[0 * 32]); \ - PACK_AND_STORE(c, d, diag2, diag1, &(out)[2 * 32]); \ + PACK_AND_STORE(a, b, diag1, diag2, out + 0); /* store top */ \ + PACK_AND_STORE(c, d, diag2, diag1, out + 2 * 32); /* store bottom */ \ } // Turn the macro into a function for reducing code-size when non-critical @@ -106,104 +104,140 @@ static void Upsample32Pixels(const uint8_t r1[], const uint8_t r2[], Upsample32Pixels(r1, r2, out); \ } -#define CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, uv, \ +#define CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, \ top_dst, bottom_dst, cur_x, num_pixels) { \ int n; \ - if (top_y) { \ - for (n = 0; n < (num_pixels); ++n) { \ - FUNC(top_y[(cur_x) + n], (uv)[n], (uv)[32 + n], \ - top_dst + ((cur_x) + n) * XSTEP); \ - } \ + for (n = 0; n < (num_pixels); ++n) { \ + FUNC(top_y[(cur_x) + n], r_u[n], r_v[n], \ + top_dst + ((cur_x) + n) * XSTEP); \ } \ - if (bottom_y) { \ + if (bottom_y != NULL) { \ for (n = 0; n < (num_pixels); ++n) { \ - FUNC(bottom_y[(cur_x) + n], (uv)[64 + n], (uv)[64 + 32 + n], \ + FUNC(bottom_y[(cur_x) + n], r_u[64 + n], r_v[64 + n], \ bottom_dst + ((cur_x) + n) * XSTEP); \ } \ } \ } +#define CONVERT2RGB_32(FUNC, XSTEP, top_y, bottom_y, \ + top_dst, bottom_dst, cur_x) do { \ + FUNC##32(top_y + (cur_x), r_u, r_v, top_dst + (cur_x) * XSTEP); \ + if (bottom_y != NULL) { \ + FUNC##32(bottom_y + (cur_x), r_u + 64, r_v + 64, \ + bottom_dst + (cur_x) * XSTEP); \ + } \ +} while (0) + #define SSE2_UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ const uint8_t* top_u, const uint8_t* top_v, \ const uint8_t* cur_u, const uint8_t* cur_v, \ uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ - int b; \ - /* 16 byte aligned array to cache reconstructed u and v */ \ + int uv_pos, pos; \ + /* 16byte-aligned array to cache reconstructed u and v */ \ uint8_t uv_buf[4 * 32 + 15]; \ - uint8_t* const r_uv = (uint8_t*)((uintptr_t)(uv_buf + 15) & ~15); \ - const int uv_len = (len + 1) >> 1; \ - /* 17 pixels must be read-able for each block */ \ - const int num_blocks = (uv_len - 1) >> 4; \ - const int leftover = uv_len - num_blocks * 16; \ - const int last_pos = 1 + 32 * num_blocks; \ - \ - const int u_diag = ((top_u[0] + cur_u[0]) >> 1) + 1; \ - const int v_diag = ((top_v[0] + cur_v[0]) >> 1) + 1; \ + uint8_t* const r_u = (uint8_t*)((uintptr_t)(uv_buf + 15) & ~15); \ + uint8_t* const r_v = r_u + 32; \ \ - assert(len > 0); \ - /* Treat the first pixel in regular way */ \ - if (top_y) { \ - const int u0 = (top_u[0] + u_diag) >> 1; \ - const int v0 = (top_v[0] + v_diag) >> 1; \ - FUNC(top_y[0], u0, v0, top_dst); \ + assert(top_y != NULL); \ + { /* Treat the first pixel in regular way */ \ + const int u_diag = ((top_u[0] + cur_u[0]) >> 1) + 1; \ + const int v_diag = ((top_v[0] + cur_v[0]) >> 1) + 1; \ + const int u0_t = (top_u[0] + u_diag) >> 1; \ + const int v0_t = (top_v[0] + v_diag) >> 1; \ + FUNC(top_y[0], u0_t, v0_t, top_dst); \ + if (bottom_y != NULL) { \ + const int u0_b = (cur_u[0] + u_diag) >> 1; \ + const int v0_b = (cur_v[0] + v_diag) >> 1; \ + FUNC(bottom_y[0], u0_b, v0_b, bottom_dst); \ + } \ } \ - if (bottom_y) { \ - const int u0 = (cur_u[0] + u_diag) >> 1; \ - const int v0 = (cur_v[0] + v_diag) >> 1; \ - FUNC(bottom_y[0], u0, v0, bottom_dst); \ + /* For UPSAMPLE_32PIXELS, 17 u/v values must be read-able for each block */ \ + for (pos = 1, uv_pos = 0; pos + 32 + 1 <= len; pos += 32, uv_pos += 16) { \ + UPSAMPLE_32PIXELS(top_u + uv_pos, cur_u + uv_pos, r_u); \ + UPSAMPLE_32PIXELS(top_v + uv_pos, cur_v + uv_pos, r_v); \ + CONVERT2RGB_32(FUNC, XSTEP, top_y, bottom_y, top_dst, bottom_dst, pos); \ } \ - \ - for (b = 0; b < num_blocks; ++b) { \ - UPSAMPLE_32PIXELS(top_u, cur_u, r_uv + 0 * 32); \ - UPSAMPLE_32PIXELS(top_v, cur_v, r_uv + 1 * 32); \ - CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, r_uv, top_dst, bottom_dst, \ - 32 * b + 1, 32) \ - top_u += 16; \ - cur_u += 16; \ - top_v += 16; \ - cur_v += 16; \ + if (len > 1) { \ + const int left_over = ((len + 1) >> 1) - (pos >> 1); \ + assert(left_over > 0); \ + UPSAMPLE_LAST_BLOCK(top_u + uv_pos, cur_u + uv_pos, left_over, r_u); \ + UPSAMPLE_LAST_BLOCK(top_v + uv_pos, cur_v + uv_pos, left_over, r_v); \ + CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, top_dst, bottom_dst, \ + pos, len - pos); \ } \ - \ - UPSAMPLE_LAST_BLOCK(top_u, cur_u, leftover, r_uv + 0 * 32); \ - UPSAMPLE_LAST_BLOCK(top_v, cur_v, leftover, r_uv + 1 * 32); \ - CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, r_uv, top_dst, bottom_dst, \ - last_pos, len - last_pos); \ } // SSE2 variants of the fancy upsampler. -SSE2_UPSAMPLE_FUNC(UpsampleRgbLinePairSSE2, VP8YuvToRgb, 3) -SSE2_UPSAMPLE_FUNC(UpsampleBgrLinePairSSE2, VP8YuvToBgr, 3) -SSE2_UPSAMPLE_FUNC(UpsampleRgbaLinePairSSE2, VP8YuvToRgba, 4) -SSE2_UPSAMPLE_FUNC(UpsampleBgraLinePairSSE2, VP8YuvToBgra, 4) +SSE2_UPSAMPLE_FUNC(UpsampleRgbLinePair, VP8YuvToRgb, 3) +SSE2_UPSAMPLE_FUNC(UpsampleBgrLinePair, VP8YuvToBgr, 3) +SSE2_UPSAMPLE_FUNC(UpsampleRgbaLinePair, VP8YuvToRgba, 4) +SSE2_UPSAMPLE_FUNC(UpsampleBgraLinePair, VP8YuvToBgra, 4) #undef GET_M #undef PACK_AND_STORE #undef UPSAMPLE_32PIXELS #undef UPSAMPLE_LAST_BLOCK #undef CONVERT2RGB +#undef CONVERT2RGB_32 #undef SSE2_UPSAMPLE_FUNC //------------------------------------------------------------------------------ +// Entry point extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; -void WebPInitUpsamplersSSE2(void) { - WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePairSSE2; - WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePairSSE2; - WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePairSSE2; - WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePairSSE2; -} +extern void WebPInitUpsamplersSSE2(void); -void WebPInitPremultiplySSE2(void) { - WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePairSSE2; - WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePairSSE2; +WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplersSSE2(void) { + VP8YUVInitSSE2(); + WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair; + WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair; + WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair; + WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; } #endif // FANCY_UPSAMPLING -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif +//------------------------------------------------------------------------------ + +extern WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */]; +extern void WebPInitYUV444ConvertersSSE2(void); + +#define YUV444_FUNC(FUNC_NAME, CALL, XSTEP) \ +extern void WebP##FUNC_NAME##C(const uint8_t* y, const uint8_t* u, \ + const uint8_t* v, uint8_t* dst, int len); \ +static void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len) { \ + int i; \ + const int max_len = len & ~31; \ + for (i = 0; i < max_len; i += 32) CALL(y + i, u + i, v + i, dst + i * XSTEP);\ + if (i < len) { /* C-fallback */ \ + WebP##FUNC_NAME##C(y + i, u + i, v + i, dst + i * XSTEP, len - i); \ + } \ +} -#endif // WEBP_USE_SSE2 +YUV444_FUNC(Yuv444ToRgba, VP8YuvToRgba32, 4); +YUV444_FUNC(Yuv444ToBgra, VP8YuvToBgra32, 4); +YUV444_FUNC(Yuv444ToRgb, VP8YuvToRgb32, 3); +YUV444_FUNC(Yuv444ToBgr, VP8YuvToBgr32, 3); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitYUV444ConvertersSSE2(void) { + VP8YUVInitSSE2(); + WebPYUV444Converters[MODE_RGBA] = Yuv444ToRgba; + WebPYUV444Converters[MODE_BGRA] = Yuv444ToBgra; + WebPYUV444Converters[MODE_RGB] = Yuv444ToRgb; + WebPYUV444Converters[MODE_BGR] = Yuv444ToBgr; +} + +#else + +WEBP_DSP_INIT_STUB(WebPInitYUV444ConvertersSSE2) + +#endif // WEBP_USE_SSE2 + +#if !(defined(FANCY_UPSAMPLING) && defined(WEBP_USE_SSE2)) +WEBP_DSP_INIT_STUB(WebPInitUpsamplersSSE2) +#endif diff --git a/drivers/webp/dsp/yuv.c b/drivers/webp/dsp/yuv.c index 7f05f9a3aa..f50a253168 100644 --- a/drivers/webp/dsp/yuv.c +++ b/drivers/webp/dsp/yuv.c @@ -1,26 +1,19 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // -// YUV->RGB conversion function +// YUV->RGB conversion functions // // Author: Skal (pascal.massimino@gmail.com) #include "./yuv.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -enum { YUV_HALF = 1 << (YUV_FIX - 1) }; - -int16_t VP8kVToR[256], VP8kUToB[256]; -int32_t VP8kVToG[256], VP8kUToG[256]; -uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN]; -uint8_t VP8kClip4Bits[YUV_RANGE_MAX - YUV_RANGE_MIN]; +#if defined(WEBP_YUV_USE_TABLE) static int done = 0; @@ -28,11 +21,17 @@ static WEBP_INLINE uint8_t clip(int v, int max_value) { return v < 0 ? 0 : v > max_value ? max_value : v; } -void VP8YUVInit(void) { +int16_t VP8kVToR[256], VP8kUToB[256]; +int32_t VP8kVToG[256], VP8kUToG[256]; +uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN]; +uint8_t VP8kClip4Bits[YUV_RANGE_MAX - YUV_RANGE_MIN]; + +WEBP_TSAN_IGNORE_FUNCTION void VP8YUVInit(void) { int i; if (done) { return; } +#ifndef USE_YUVj for (i = 0; i < 256; ++i) { VP8kVToR[i] = (89858 * (i - 128) + YUV_HALF) >> YUV_FIX; VP8kUToG[i] = -22014 * (i - 128) + YUV_HALF; @@ -44,9 +43,238 @@ void VP8YUVInit(void) { VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255); VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15); } +#else + for (i = 0; i < 256; ++i) { + VP8kVToR[i] = (91881 * (i - 128) + YUV_HALF) >> YUV_FIX; + VP8kUToG[i] = -22554 * (i - 128) + YUV_HALF; + VP8kVToG[i] = -46802 * (i - 128); + VP8kUToB[i] = (116130 * (i - 128) + YUV_HALF) >> YUV_FIX; + } + for (i = YUV_RANGE_MIN; i < YUV_RANGE_MAX; ++i) { + const int k = i; + VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255); + VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15); + } +#endif + done = 1; } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif +#else + +WEBP_TSAN_IGNORE_FUNCTION void VP8YUVInit(void) {} + +#endif // WEBP_YUV_USE_TABLE + +//----------------------------------------------------------------------------- +// Plain-C version + +#define ROW_FUNC(FUNC_NAME, FUNC, XSTEP) \ +static void FUNC_NAME(const uint8_t* y, \ + const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len) { \ + const uint8_t* const end = dst + (len & ~1) * XSTEP; \ + while (dst != end) { \ + FUNC(y[0], u[0], v[0], dst); \ + FUNC(y[1], u[0], v[0], dst + XSTEP); \ + y += 2; \ + ++u; \ + ++v; \ + dst += 2 * XSTEP; \ + } \ + if (len & 1) { \ + FUNC(y[0], u[0], v[0], dst); \ + } \ +} \ + +// All variants implemented. +ROW_FUNC(YuvToRgbRow, VP8YuvToRgb, 3) +ROW_FUNC(YuvToBgrRow, VP8YuvToBgr, 3) +ROW_FUNC(YuvToRgbaRow, VP8YuvToRgba, 4) +ROW_FUNC(YuvToBgraRow, VP8YuvToBgra, 4) +ROW_FUNC(YuvToArgbRow, VP8YuvToArgb, 4) +ROW_FUNC(YuvToRgba4444Row, VP8YuvToRgba4444, 2) +ROW_FUNC(YuvToRgb565Row, VP8YuvToRgb565, 2) + +#undef ROW_FUNC + +// Main call for processing a plane with a WebPSamplerRowFunc function: +void WebPSamplerProcessPlane(const uint8_t* y, int y_stride, + const uint8_t* u, const uint8_t* v, int uv_stride, + uint8_t* dst, int dst_stride, + int width, int height, WebPSamplerRowFunc func) { + int j; + for (j = 0; j < height; ++j) { + func(y, u, v, dst, width); + y += y_stride; + if (j & 1) { + u += uv_stride; + v += uv_stride; + } + dst += dst_stride; + } +} + +//----------------------------------------------------------------------------- +// Main call + +WebPSamplerRowFunc WebPSamplers[MODE_LAST]; + +extern void WebPInitSamplersSSE2(void); +extern void WebPInitSamplersMIPS32(void); +extern void WebPInitSamplersMIPSdspR2(void); + +static volatile VP8CPUInfo yuv_last_cpuinfo_used = + (VP8CPUInfo)&yuv_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplers(void) { + if (yuv_last_cpuinfo_used == VP8GetCPUInfo) return; + + WebPSamplers[MODE_RGB] = YuvToRgbRow; + WebPSamplers[MODE_RGBA] = YuvToRgbaRow; + WebPSamplers[MODE_BGR] = YuvToBgrRow; + WebPSamplers[MODE_BGRA] = YuvToBgraRow; + WebPSamplers[MODE_ARGB] = YuvToArgbRow; + WebPSamplers[MODE_RGBA_4444] = YuvToRgba4444Row; + WebPSamplers[MODE_RGB_565] = YuvToRgb565Row; + WebPSamplers[MODE_rgbA] = YuvToRgbaRow; + WebPSamplers[MODE_bgrA] = YuvToBgraRow; + WebPSamplers[MODE_Argb] = YuvToArgbRow; + WebPSamplers[MODE_rgbA_4444] = YuvToRgba4444Row; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitSamplersSSE2(); + } +#endif // WEBP_USE_SSE2 +#if defined(WEBP_USE_MIPS32) + if (VP8GetCPUInfo(kMIPS32)) { + WebPInitSamplersMIPS32(); + } +#endif // WEBP_USE_MIPS32 +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + WebPInitSamplersMIPSdspR2(); + } +#endif // WEBP_USE_MIPS_DSP_R2 + } + yuv_last_cpuinfo_used = VP8GetCPUInfo; +} + +//----------------------------------------------------------------------------- +// ARGB -> YUV converters + +static void ConvertARGBToY(const uint32_t* argb, uint8_t* y, int width) { + int i; + for (i = 0; i < width; ++i) { + const uint32_t p = argb[i]; + y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff, + YUV_HALF); + } +} + +void WebPConvertARGBToUV_C(const uint32_t* argb, uint8_t* u, uint8_t* v, + int src_width, int do_store) { + // No rounding. Last pixel is dealt with separately. + const int uv_width = src_width >> 1; + int i; + for (i = 0; i < uv_width; ++i) { + const uint32_t v0 = argb[2 * i + 0]; + const uint32_t v1 = argb[2 * i + 1]; + // VP8RGBToU/V expects four accumulated pixels. Hence we need to + // scale r/g/b value by a factor 2. We just shift v0/v1 one bit less. + const int r = ((v0 >> 15) & 0x1fe) + ((v1 >> 15) & 0x1fe); + const int g = ((v0 >> 7) & 0x1fe) + ((v1 >> 7) & 0x1fe); + const int b = ((v0 << 1) & 0x1fe) + ((v1 << 1) & 0x1fe); + const int tmp_u = VP8RGBToU(r, g, b, YUV_HALF << 2); + const int tmp_v = VP8RGBToV(r, g, b, YUV_HALF << 2); + if (do_store) { + u[i] = tmp_u; + v[i] = tmp_v; + } else { + // Approximated average-of-four. But it's an acceptable diff. + u[i] = (u[i] + tmp_u + 1) >> 1; + v[i] = (v[i] + tmp_v + 1) >> 1; + } + } + if (src_width & 1) { // last pixel + const uint32_t v0 = argb[2 * i + 0]; + const int r = (v0 >> 14) & 0x3fc; + const int g = (v0 >> 6) & 0x3fc; + const int b = (v0 << 2) & 0x3fc; + const int tmp_u = VP8RGBToU(r, g, b, YUV_HALF << 2); + const int tmp_v = VP8RGBToV(r, g, b, YUV_HALF << 2); + if (do_store) { + u[i] = tmp_u; + v[i] = tmp_v; + } else { + u[i] = (u[i] + tmp_u + 1) >> 1; + v[i] = (v[i] + tmp_v + 1) >> 1; + } + } +} + +//----------------------------------------------------------------------------- + +static void ConvertRGB24ToY(const uint8_t* rgb, uint8_t* y, int width) { + int i; + for (i = 0; i < width; ++i, rgb += 3) { + y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF); + } +} + +static void ConvertBGR24ToY(const uint8_t* bgr, uint8_t* y, int width) { + int i; + for (i = 0; i < width; ++i, bgr += 3) { + y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF); + } +} + +void WebPConvertRGBA32ToUV_C(const uint16_t* rgb, + uint8_t* u, uint8_t* v, int width) { + int i; + for (i = 0; i < width; i += 1, rgb += 4) { + const int r = rgb[0], g = rgb[1], b = rgb[2]; + u[i] = VP8RGBToU(r, g, b, YUV_HALF << 2); + v[i] = VP8RGBToV(r, g, b, YUV_HALF << 2); + } +} + +//----------------------------------------------------------------------------- + +void (*WebPConvertRGB24ToY)(const uint8_t* rgb, uint8_t* y, int width); +void (*WebPConvertBGR24ToY)(const uint8_t* bgr, uint8_t* y, int width); +void (*WebPConvertRGBA32ToUV)(const uint16_t* rgb, + uint8_t* u, uint8_t* v, int width); + +void (*WebPConvertARGBToY)(const uint32_t* argb, uint8_t* y, int width); +void (*WebPConvertARGBToUV)(const uint32_t* argb, uint8_t* u, uint8_t* v, + int src_width, int do_store); + +static volatile VP8CPUInfo rgba_to_yuv_last_cpuinfo_used = + (VP8CPUInfo)&rgba_to_yuv_last_cpuinfo_used; + +extern void WebPInitConvertARGBToYUVSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUV(void) { + if (rgba_to_yuv_last_cpuinfo_used == VP8GetCPUInfo) return; + + WebPConvertARGBToY = ConvertARGBToY; + WebPConvertARGBToUV = WebPConvertARGBToUV_C; + + WebPConvertRGB24ToY = ConvertRGB24ToY; + WebPConvertBGR24ToY = ConvertBGR24ToY; + + WebPConvertRGBA32ToUV = WebPConvertRGBA32ToUV_C; + + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitConvertARGBToYUVSSE2(); + } +#endif // WEBP_USE_SSE2 + } + rgba_to_yuv_last_cpuinfo_used = VP8GetCPUInfo; +} diff --git a/drivers/webp/dsp/yuv.h b/drivers/webp/dsp/yuv.h index a569109c54..af435a5b3e 100644 --- a/drivers/webp/dsp/yuv.h +++ b/drivers/webp/dsp/yuv.h @@ -1,36 +1,165 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // inline YUV<->RGB conversion function // +// The exact naming is Y'CbCr, following the ITU-R BT.601 standard. +// More information at: http://en.wikipedia.org/wiki/YCbCr +// Y = 0.2569 * R + 0.5044 * G + 0.0979 * B + 16 +// U = -0.1483 * R - 0.2911 * G + 0.4394 * B + 128 +// V = 0.4394 * R - 0.3679 * G - 0.0715 * B + 128 +// We use 16bit fixed point operations for RGB->YUV conversion (YUV_FIX). +// +// For the Y'CbCr to RGB conversion, the BT.601 specification reads: +// R = 1.164 * (Y-16) + 1.596 * (V-128) +// G = 1.164 * (Y-16) - 0.813 * (V-128) - 0.391 * (U-128) +// B = 1.164 * (Y-16) + 2.018 * (U-128) +// where Y is in the [16,235] range, and U/V in the [16,240] range. +// In the table-lookup version (WEBP_YUV_USE_TABLE), the common factor +// "1.164 * (Y-16)" can be handled as an offset in the VP8kClip[] table. +// So in this case the formulae should read: +// R = 1.164 * [Y + 1.371 * (V-128) ] - 18.624 +// G = 1.164 * [Y - 0.698 * (V-128) - 0.336 * (U-128)] - 18.624 +// B = 1.164 * [Y + 1.733 * (U-128)] - 18.624 +// once factorized. +// For YUV->RGB conversion, only 14bit fixed precision is used (YUV_FIX2). +// That's the maximum possible for a convenient ARM implementation. +// // Author: Skal (pascal.massimino@gmail.com) #ifndef WEBP_DSP_YUV_H_ #define WEBP_DSP_YUV_H_ +#include "./dsp.h" #include "../dec/decode_vp8.h" +// Define the following to use the LUT-based code: +// #define WEBP_YUV_USE_TABLE + +#if defined(WEBP_EXPERIMENTAL_FEATURES) +// Do NOT activate this feature for real compression. This is only experimental! +// This flag is for comparison purpose against JPEG's "YUVj" natural colorspace. +// This colorspace is close to Rec.601's Y'CbCr model with the notable +// difference of allowing larger range for luma/chroma. +// See http://en.wikipedia.org/wiki/YCbCr#JPEG_conversion paragraph, and its +// difference with http://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.601_conversion +// #define USE_YUVj +#endif + //------------------------------------------------------------------------------ // YUV -> RGB conversion -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -enum { YUV_FIX = 16, // fixed-point precision - YUV_RANGE_MIN = -227, // min value of r/g/b output - YUV_RANGE_MAX = 256 + 226 // max value of r/g/b output +enum { + YUV_FIX = 16, // fixed-point precision for RGB->YUV + YUV_HALF = 1 << (YUV_FIX - 1), + YUV_MASK = (256 << YUV_FIX) - 1, + YUV_RANGE_MIN = -227, // min value of r/g/b output + YUV_RANGE_MAX = 256 + 226, // max value of r/g/b output + + YUV_FIX2 = 14, // fixed-point precision for YUV->RGB + YUV_HALF2 = 1 << (YUV_FIX2 - 1), + YUV_MASK2 = (256 << YUV_FIX2) - 1 }; + +// These constants are 14b fixed-point version of ITU-R BT.601 constants. +#define kYScale 19077 // 1.164 = 255 / 219 +#define kVToR 26149 // 1.596 = 255 / 112 * 0.701 +#define kUToG 6419 // 0.391 = 255 / 112 * 0.886 * 0.114 / 0.587 +#define kVToG 13320 // 0.813 = 255 / 112 * 0.701 * 0.299 / 0.587 +#define kUToB 33050 // 2.018 = 255 / 112 * 0.886 +#define kRCst (-kYScale * 16 - kVToR * 128 + YUV_HALF2) +#define kGCst (-kYScale * 16 + kUToG * 128 + kVToG * 128 + YUV_HALF2) +#define kBCst (-kYScale * 16 - kUToB * 128 + YUV_HALF2) + +//------------------------------------------------------------------------------ + +#if !defined(WEBP_YUV_USE_TABLE) + +// slower on x86 by ~7-8%, but bit-exact with the SSE2 version + +static WEBP_INLINE int VP8Clip8(int v) { + return ((v & ~YUV_MASK2) == 0) ? (v >> YUV_FIX2) : (v < 0) ? 0 : 255; +} + +static WEBP_INLINE int VP8YUVToR(int y, int v) { + return VP8Clip8(kYScale * y + kVToR * v + kRCst); +} + +static WEBP_INLINE int VP8YUVToG(int y, int u, int v) { + return VP8Clip8(kYScale * y - kUToG * u - kVToG * v + kGCst); +} + +static WEBP_INLINE int VP8YUVToB(int y, int u) { + return VP8Clip8(kYScale * y + kUToB * u + kBCst); +} + +static WEBP_INLINE void VP8YuvToRgb(int y, int u, int v, + uint8_t* const rgb) { + rgb[0] = VP8YUVToR(y, v); + rgb[1] = VP8YUVToG(y, u, v); + rgb[2] = VP8YUVToB(y, u); +} + +static WEBP_INLINE void VP8YuvToBgr(int y, int u, int v, + uint8_t* const bgr) { + bgr[0] = VP8YUVToB(y, u); + bgr[1] = VP8YUVToG(y, u, v); + bgr[2] = VP8YUVToR(y, v); +} + +static WEBP_INLINE void VP8YuvToRgb565(int y, int u, int v, + uint8_t* const rgb) { + const int r = VP8YUVToR(y, v); // 5 usable bits + const int g = VP8YUVToG(y, u, v); // 6 usable bits + const int b = VP8YUVToB(y, u); // 5 usable bits + const int rg = (r & 0xf8) | (g >> 5); + const int gb = ((g << 3) & 0xe0) | (b >> 3); +#ifdef WEBP_SWAP_16BIT_CSP + rgb[0] = gb; + rgb[1] = rg; +#else + rgb[0] = rg; + rgb[1] = gb; +#endif +} + +static WEBP_INLINE void VP8YuvToRgba4444(int y, int u, int v, + uint8_t* const argb) { + const int r = VP8YUVToR(y, v); // 4 usable bits + const int g = VP8YUVToG(y, u, v); // 4 usable bits + const int b = VP8YUVToB(y, u); // 4 usable bits + const int rg = (r & 0xf0) | (g >> 4); + const int ba = (b & 0xf0) | 0x0f; // overwrite the lower 4 bits +#ifdef WEBP_SWAP_16BIT_CSP + argb[0] = ba; + argb[1] = rg; +#else + argb[0] = rg; + argb[1] = ba; +#endif +} + +#else + +// Table-based version, not totally equivalent to the SSE2 version. +// Rounding diff is only +/-1 though. + extern int16_t VP8kVToR[256], VP8kUToB[256]; extern int32_t VP8kVToG[256], VP8kUToG[256]; extern uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN]; extern uint8_t VP8kClip4Bits[YUV_RANGE_MAX - YUV_RANGE_MIN]; -static WEBP_INLINE void VP8YuvToRgb(uint8_t y, uint8_t u, uint8_t v, +static WEBP_INLINE void VP8YuvToRgb(int y, int u, int v, uint8_t* const rgb) { const int r_off = VP8kVToR[v]; const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; @@ -40,42 +169,60 @@ static WEBP_INLINE void VP8YuvToRgb(uint8_t y, uint8_t u, uint8_t v, rgb[2] = VP8kClip[y + b_off - YUV_RANGE_MIN]; } -static WEBP_INLINE void VP8YuvToRgb565(uint8_t y, uint8_t u, uint8_t v, - uint8_t* const rgb) { +static WEBP_INLINE void VP8YuvToBgr(int y, int u, int v, + uint8_t* const bgr) { const int r_off = VP8kVToR[v]; const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; const int b_off = VP8kUToB[u]; - rgb[0] = ((VP8kClip[y + r_off - YUV_RANGE_MIN] & 0xf8) | - (VP8kClip[y + g_off - YUV_RANGE_MIN] >> 5)); - rgb[1] = (((VP8kClip[y + g_off - YUV_RANGE_MIN] << 3) & 0xe0) | - (VP8kClip[y + b_off - YUV_RANGE_MIN] >> 3)); -} - -static WEBP_INLINE void VP8YuvToArgb(uint8_t y, uint8_t u, uint8_t v, - uint8_t* const argb) { - argb[0] = 0xff; - VP8YuvToRgb(y, u, v, argb + 1); + bgr[0] = VP8kClip[y + b_off - YUV_RANGE_MIN]; + bgr[1] = VP8kClip[y + g_off - YUV_RANGE_MIN]; + bgr[2] = VP8kClip[y + r_off - YUV_RANGE_MIN]; } -static WEBP_INLINE void VP8YuvToRgba4444(uint8_t y, uint8_t u, uint8_t v, - uint8_t* const argb) { +static WEBP_INLINE void VP8YuvToRgb565(int y, int u, int v, + uint8_t* const rgb) { const int r_off = VP8kVToR[v]; const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; const int b_off = VP8kUToB[u]; - // Don't update alpha (last 4 bits of argb[1]) - argb[0] = ((VP8kClip4Bits[y + r_off - YUV_RANGE_MIN] << 4) | - VP8kClip4Bits[y + g_off - YUV_RANGE_MIN]); - argb[1] = 0x0f | (VP8kClip4Bits[y + b_off - YUV_RANGE_MIN] << 4); + const int rg = ((VP8kClip[y + r_off - YUV_RANGE_MIN] & 0xf8) | + (VP8kClip[y + g_off - YUV_RANGE_MIN] >> 5)); + const int gb = (((VP8kClip[y + g_off - YUV_RANGE_MIN] << 3) & 0xe0) | + (VP8kClip[y + b_off - YUV_RANGE_MIN] >> 3)); +#ifdef WEBP_SWAP_16BIT_CSP + rgb[0] = gb; + rgb[1] = rg; +#else + rgb[0] = rg; + rgb[1] = gb; +#endif } -static WEBP_INLINE void VP8YuvToBgr(uint8_t y, uint8_t u, uint8_t v, - uint8_t* const bgr) { +static WEBP_INLINE void VP8YuvToRgba4444(int y, int u, int v, + uint8_t* const argb) { const int r_off = VP8kVToR[v]; const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; const int b_off = VP8kUToB[u]; - bgr[0] = VP8kClip[y + b_off - YUV_RANGE_MIN]; - bgr[1] = VP8kClip[y + g_off - YUV_RANGE_MIN]; - bgr[2] = VP8kClip[y + r_off - YUV_RANGE_MIN]; + const int rg = ((VP8kClip4Bits[y + r_off - YUV_RANGE_MIN] << 4) | + VP8kClip4Bits[y + g_off - YUV_RANGE_MIN]); + const int ba = (VP8kClip4Bits[y + b_off - YUV_RANGE_MIN] << 4) | 0x0f; +#ifdef WEBP_SWAP_16BIT_CSP + argb[0] = ba; + argb[1] = rg; +#else + argb[0] = rg; + argb[1] = ba; +#endif +} + +#endif // WEBP_YUV_USE_TABLE + +//----------------------------------------------------------------------------- +// Alpha handling variants + +static WEBP_INLINE void VP8YuvToArgb(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const argb) { + argb[0] = 0xff; + VP8YuvToRgb(y, u, v, argb + 1); } static WEBP_INLINE void VP8YuvToBgra(uint8_t y, uint8_t u, uint8_t v, @@ -93,35 +240,79 @@ static WEBP_INLINE void VP8YuvToRgba(uint8_t y, uint8_t u, uint8_t v, // Must be called before everything, to initialize the tables. void VP8YUVInit(void); +//----------------------------------------------------------------------------- +// SSE2 extra functions (mostly for upsampling_sse2.c) + +#if defined(WEBP_USE_SSE2) + +// When the following is defined, tables are initialized statically, adding ~12k +// to the binary size. Otherwise, they are initialized at run-time (small cost). +#define WEBP_YUV_USE_SSE2_TABLES + +// Process 32 pixels and store the result (24b or 32b per pixel) in *dst. +void VP8YuvToRgba32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst); +void VP8YuvToRgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst); +void VP8YuvToBgra32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst); +void VP8YuvToBgr32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst); + +// Must be called to initialize tables before using the functions. +void VP8YUVInitSSE2(void); + +#endif // WEBP_USE_SSE2 + //------------------------------------------------------------------------------ // RGB -> YUV conversion -// The exact naming is Y'CbCr, following the ITU-R BT.601 standard. -// More information at: http://en.wikipedia.org/wiki/YCbCr -// Y = 0.2569 * R + 0.5044 * G + 0.0979 * B + 16 -// U = -0.1483 * R - 0.2911 * G + 0.4394 * B + 128 -// V = 0.4394 * R - 0.3679 * G - 0.0715 * B + 128 -// We use 16bit fixed point operations. -static WEBP_INLINE int VP8ClipUV(int v) { - v = (v + (257 << (YUV_FIX + 2 - 1))) >> (YUV_FIX + 2); - return ((v & ~0xff) == 0) ? v : (v < 0) ? 0 : 255; +// Stub functions that can be called with various rounding values: +static WEBP_INLINE int VP8ClipUV(int uv, int rounding) { + uv = (uv + rounding + (128 << (YUV_FIX + 2))) >> (YUV_FIX + 2); + return ((uv & ~0xff) == 0) ? uv : (uv < 0) ? 0 : 255; } -static WEBP_INLINE int VP8RGBToY(int r, int g, int b) { - const int kRound = (1 << (YUV_FIX - 1)) + (16 << YUV_FIX); +#ifndef USE_YUVj + +static WEBP_INLINE int VP8RGBToY(int r, int g, int b, int rounding) { const int luma = 16839 * r + 33059 * g + 6420 * b; - return (luma + kRound) >> YUV_FIX; // no need to clip + return (luma + rounding + (16 << YUV_FIX)) >> YUV_FIX; // no need to clip } -static WEBP_INLINE int VP8RGBToU(int r, int g, int b) { - return VP8ClipUV(-9719 * r - 19081 * g + 28800 * b); +static WEBP_INLINE int VP8RGBToU(int r, int g, int b, int rounding) { + const int u = -9719 * r - 19081 * g + 28800 * b; + return VP8ClipUV(u, rounding); } -static WEBP_INLINE int VP8RGBToV(int r, int g, int b) { - return VP8ClipUV(+28800 * r - 24116 * g - 4684 * b); +static WEBP_INLINE int VP8RGBToV(int r, int g, int b, int rounding) { + const int v = +28800 * r - 24116 * g - 4684 * b; + return VP8ClipUV(v, rounding); +} + +#else + +// This JPEG-YUV colorspace, only for comparison! +// These are also 16bit precision coefficients from Rec.601, but with full +// [0..255] output range. +static WEBP_INLINE int VP8RGBToY(int r, int g, int b, int rounding) { + const int luma = 19595 * r + 38470 * g + 7471 * b; + return (luma + rounding) >> YUV_FIX; // no need to clip } -#if defined(__cplusplus) || defined(c_plusplus) +static WEBP_INLINE int VP8RGBToU(int r, int g, int b, int rounding) { + const int u = -11058 * r - 21710 * g + 32768 * b; + return VP8ClipUV(u, rounding); +} + +static WEBP_INLINE int VP8RGBToV(int r, int g, int b, int rounding) { + const int v = 32768 * r - 27439 * g - 5329 * b; + return VP8ClipUV(v, rounding); +} + +#endif // USE_YUVj + +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/enc/alpha.c b/drivers/webp/enc/alpha.c index e554eb7f30..fad6346e43 100644 --- a/drivers/webp/enc/alpha.c +++ b/drivers/webp/enc/alpha.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Alpha-plane compression. @@ -13,13 +15,11 @@ #include <stdlib.h> #include "./vp8enci.h" +#include "../dsp/dsp.h" #include "../utils/filters.h" #include "../utils/quant_levels.h" -#include "../format_constants.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "../utils/utils.h" +#include "../webp/format_constants.h" // ----------------------------------------------------------------------------- // Encodes the given alpha data via specified compression method 'method'. @@ -36,7 +36,7 @@ extern "C" { // // 'output' corresponds to the buffer containing compressed alpha data. // This buffer is allocated by this method and caller should call -// free(*output) when done. +// WebPSafeFree(*output) when done. // 'output_size' corresponds to size of this compressed alpha buffer. // // Returns 1 on successfully encoding the alpha and @@ -48,12 +48,11 @@ extern "C" { static int EncodeLossless(const uint8_t* const data, int width, int height, int effort_level, // in [0..6] range - VP8BitWriter* const bw, + VP8LBitWriter* const bw, WebPAuxStats* const stats) { int ok = 0; WebPConfig config; WebPPicture picture; - VP8LBitWriter tmp_bw; WebPPictureInit(&picture); picture.width = width; @@ -63,53 +62,51 @@ static int EncodeLossless(const uint8_t* const data, int width, int height, if (!WebPPictureAlloc(&picture)) return 0; // Transfer the alpha values to the green channel. - { - int i, j; - uint32_t* dst = picture.argb; - const uint8_t* src = data; - for (j = 0; j < picture.height; ++j) { - for (i = 0; i < picture.width; ++i) { - dst[i] = (src[i] << 8) | 0xff000000u; - } - src += width; - dst += picture.argb_stride; - } - } + WebPDispatchAlphaToGreen(data, width, picture.width, picture.height, + picture.argb, picture.argb_stride); WebPConfigInit(&config); config.lossless = 1; config.method = effort_level; // impact is very small - // Set moderate default quality setting for alpha. Higher qualities (80 and - // above) could be very slow. - config.quality = 10.f + 15.f * effort_level; - if (config.quality > 100.f) config.quality = 100.f; + // Set a low default quality for encoding alpha. Ensure that Alpha quality at + // lower methods (3 and below) is less than the threshold for triggering + // costly 'BackwardReferencesTraceBackwards'. + config.quality = 8.f * effort_level; + assert(config.quality >= 0 && config.quality <= 100.f); - ok = VP8LBitWriterInit(&tmp_bw, (width * height) >> 3); - ok = ok && (VP8LEncodeStream(&config, &picture, &tmp_bw) == VP8_ENC_OK); + ok = (VP8LEncodeStream(&config, &picture, bw) == VP8_ENC_OK); WebPPictureFree(&picture); - if (ok) { - const uint8_t* const data = VP8LBitWriterFinish(&tmp_bw); - const size_t data_size = VP8LBitWriterNumBytes(&tmp_bw); - VP8BitWriterAppend(bw, data, data_size); + ok = ok && !bw->error_; + if (!ok) { + VP8LBitWriterWipeOut(bw); + return 0; } - VP8LBitWriterDestroy(&tmp_bw); - return ok && !bw->error_; + return 1; } // ----------------------------------------------------------------------------- +// Small struct to hold the result of a filter mode compression attempt. +typedef struct { + size_t score; + VP8BitWriter bw; + WebPAuxStats stats; +} FilterTrial; + +// This function always returns an initialized 'bw' object, even upon error. static int EncodeAlphaInternal(const uint8_t* const data, int width, int height, int method, int filter, int reduce_levels, int effort_level, // in [0..6] range uint8_t* const tmp_alpha, - VP8BitWriter* const bw, - WebPAuxStats* const stats) { + FilterTrial* result) { int ok = 0; const uint8_t* alpha_src; WebPFilterFunc filter_func; uint8_t header; - size_t expected_size; const size_t data_size = width * height; + const uint8_t* output = NULL; + size_t output_size = 0; + VP8LBitWriter tmp_bw; assert((uint64_t)data_size == (uint64_t)width * height); // as per spec assert(filter >= 0 && filter < WEBP_FILTER_LAST); @@ -118,43 +115,163 @@ static int EncodeAlphaInternal(const uint8_t* const data, int width, int height, assert(sizeof(header) == ALPHA_HEADER_LEN); // TODO(skal): have a common function and #define's to validate alpha params. - expected_size = - (method == ALPHA_NO_COMPRESSION) ? (ALPHA_HEADER_LEN + data_size) - : (data_size >> 5); - header = method | (filter << 2); - if (reduce_levels) header |= ALPHA_PREPROCESSED_LEVELS << 4; - - VP8BitWriterInit(bw, expected_size); - VP8BitWriterAppend(bw, &header, ALPHA_HEADER_LEN); - filter_func = WebPFilters[filter]; - if (filter_func) { - filter_func(data, width, height, 1, width, tmp_alpha); + if (filter_func != NULL) { + filter_func(data, width, height, width, tmp_alpha); alpha_src = tmp_alpha; } else { alpha_src = data; } + if (method != ALPHA_NO_COMPRESSION) { + ok = VP8LBitWriterInit(&tmp_bw, data_size >> 3); + ok = ok && EncodeLossless(alpha_src, width, height, effort_level, + &tmp_bw, &result->stats); + if (ok) { + output = VP8LBitWriterFinish(&tmp_bw); + output_size = VP8LBitWriterNumBytes(&tmp_bw); + if (output_size > data_size) { + // compressed size is larger than source! Revert to uncompressed mode. + method = ALPHA_NO_COMPRESSION; + VP8LBitWriterWipeOut(&tmp_bw); + } + } else { + VP8LBitWriterWipeOut(&tmp_bw); + return 0; + } + } + if (method == ALPHA_NO_COMPRESSION) { - ok = VP8BitWriterAppend(bw, alpha_src, width * height); - ok = ok && !bw->error_; - } else { - ok = EncodeLossless(alpha_src, width, height, effort_level, bw, stats); - VP8BitWriterFinish(bw); + output = alpha_src; + output_size = data_size; + ok = 1; + } + + // Emit final result. + header = method | (filter << 2); + if (reduce_levels) header |= ALPHA_PREPROCESSED_LEVELS << 4; + + VP8BitWriterInit(&result->bw, ALPHA_HEADER_LEN + output_size); + ok = ok && VP8BitWriterAppend(&result->bw, &header, ALPHA_HEADER_LEN); + ok = ok && VP8BitWriterAppend(&result->bw, output, output_size); + + if (method != ALPHA_NO_COMPRESSION) { + VP8LBitWriterWipeOut(&tmp_bw); } + ok = ok && !result->bw.error_; + result->score = VP8BitWriterSize(&result->bw); return ok; } // ----------------------------------------------------------------------------- -// TODO(skal): move to dsp/ ? -static void CopyPlane(const uint8_t* src, int src_stride, - uint8_t* dst, int dst_stride, int width, int height) { - while (height-- > 0) { - memcpy(dst, src, width); - src += src_stride; - dst += dst_stride; +static int GetNumColors(const uint8_t* data, int width, int height, + int stride) { + int j; + int colors = 0; + uint8_t color[256] = { 0 }; + + for (j = 0; j < height; ++j) { + int i; + const uint8_t* const p = data + j * stride; + for (i = 0; i < width; ++i) { + color[p[i]] = 1; + } + } + for (j = 0; j < 256; ++j) { + if (color[j] > 0) ++colors; } + return colors; +} + +#define FILTER_TRY_NONE (1 << WEBP_FILTER_NONE) +#define FILTER_TRY_ALL ((1 << WEBP_FILTER_LAST) - 1) + +// Given the input 'filter' option, return an OR'd bit-set of filters to try. +static uint32_t GetFilterMap(const uint8_t* alpha, int width, int height, + int filter, int effort_level) { + uint32_t bit_map = 0U; + if (filter == WEBP_FILTER_FAST) { + // Quick estimate of the best candidate. + int try_filter_none = (effort_level > 3); + const int kMinColorsForFilterNone = 16; + const int kMaxColorsForFilterNone = 192; + const int num_colors = GetNumColors(alpha, width, height, width); + // For low number of colors, NONE yields better compression. + filter = (num_colors <= kMinColorsForFilterNone) + ? WEBP_FILTER_NONE + : WebPEstimateBestFilter(alpha, width, height, width); + bit_map |= 1 << filter; + // For large number of colors, try FILTER_NONE in addition to the best + // filter as well. + if (try_filter_none || num_colors > kMaxColorsForFilterNone) { + bit_map |= FILTER_TRY_NONE; + } + } else if (filter == WEBP_FILTER_NONE) { + bit_map = FILTER_TRY_NONE; + } else { // WEBP_FILTER_BEST -> try all + bit_map = FILTER_TRY_ALL; + } + return bit_map; +} + +static void InitFilterTrial(FilterTrial* const score) { + score->score = (size_t)~0U; + VP8BitWriterInit(&score->bw, 0); +} + +static int ApplyFiltersAndEncode(const uint8_t* alpha, int width, int height, + size_t data_size, int method, int filter, + int reduce_levels, int effort_level, + uint8_t** const output, + size_t* const output_size, + WebPAuxStats* const stats) { + int ok = 1; + FilterTrial best; + uint32_t try_map = + GetFilterMap(alpha, width, height, filter, effort_level); + InitFilterTrial(&best); + + if (try_map != FILTER_TRY_NONE) { + uint8_t* filtered_alpha = (uint8_t*)WebPSafeMalloc(1ULL, data_size); + if (filtered_alpha == NULL) return 0; + + for (filter = WEBP_FILTER_NONE; ok && try_map; ++filter, try_map >>= 1) { + if (try_map & 1) { + FilterTrial trial; + ok = EncodeAlphaInternal(alpha, width, height, method, filter, + reduce_levels, effort_level, filtered_alpha, + &trial); + if (ok && trial.score < best.score) { + VP8BitWriterWipeOut(&best.bw); + best = trial; + } else { + VP8BitWriterWipeOut(&trial.bw); + } + } + } + WebPSafeFree(filtered_alpha); + } else { + ok = EncodeAlphaInternal(alpha, width, height, method, WEBP_FILTER_NONE, + reduce_levels, effort_level, NULL, &best); + } + if (ok) { + if (stats != NULL) { + stats->lossless_features = best.stats.lossless_features; + stats->histogram_bits = best.stats.histogram_bits; + stats->transform_bits = best.stats.transform_bits; + stats->cache_bits = best.stats.cache_bits; + stats->palette_size = best.stats.palette_size; + stats->lossless_size = best.stats.lossless_size; + stats->lossless_hdr_size = best.stats.lossless_hdr_size; + stats->lossless_data_size = best.stats.lossless_data_size; + } + *output_size = VP8BitWriterSize(&best.bw); + *output = VP8BitWriterBuf(&best.bw); + } else { + VP8BitWriterWipeOut(&best.bw); + } + return ok; } static int EncodeAlpha(VP8Encoder* const enc, @@ -187,13 +304,18 @@ static int EncodeAlpha(VP8Encoder* const enc, return 0; } - quant_alpha = (uint8_t*)malloc(data_size); + if (method == ALPHA_NO_COMPRESSION) { + // Don't filter, as filtering will make no impact on compressed size. + filter = WEBP_FILTER_NONE; + } + + quant_alpha = (uint8_t*)WebPSafeMalloc(1ULL, data_size); if (quant_alpha == NULL) { return 0; } // Extract alpha data (width x height) from raw_data (stride x height). - CopyPlane(pic->a, pic->a_stride, quant_alpha, width, width, height); + WebPCopyPlane(pic->a, pic->a_stride, quant_alpha, width, width, height); if (reduce_levels) { // No Quantization required for 'quality = 100'. // 16 alpha levels gives quite a low MSE w.r.t original alpha plane hence @@ -205,126 +327,99 @@ static int EncodeAlpha(VP8Encoder* const enc, } if (ok) { - VP8BitWriter bw; - int test_filter; - uint8_t* filtered_alpha = NULL; - - // We always test WEBP_FILTER_NONE first. - ok = EncodeAlphaInternal(quant_alpha, width, height, - method, WEBP_FILTER_NONE, reduce_levels, - effort_level, NULL, &bw, pic->stats); - if (!ok) { - VP8BitWriterWipeOut(&bw); - goto End; - } - - if (filter == WEBP_FILTER_FAST) { // Quick estimate of a second candidate? - filter = EstimateBestFilter(quant_alpha, width, height, width); - } - // Stop? - if (filter == WEBP_FILTER_NONE) { - goto Ok; - } - - filtered_alpha = (uint8_t*)malloc(data_size); - ok = (filtered_alpha != NULL); - if (!ok) { - goto End; + VP8FiltersInit(); + ok = ApplyFiltersAndEncode(quant_alpha, width, height, data_size, method, + filter, reduce_levels, effort_level, output, + output_size, pic->stats); + if (pic->stats != NULL) { // need stats? + pic->stats->coded_size += (int)(*output_size); + enc->sse_[3] = sse; } - - // Try the other mode(s). - { - WebPAuxStats best_stats; - size_t best_score = VP8BitWriterSize(&bw); - - memset(&best_stats, 0, sizeof(best_stats)); // prevent spurious warning - if (pic->stats != NULL) best_stats = *pic->stats; - for (test_filter = WEBP_FILTER_HORIZONTAL; - ok && (test_filter <= WEBP_FILTER_GRADIENT); - ++test_filter) { - VP8BitWriter tmp_bw; - if (filter != WEBP_FILTER_BEST && test_filter != filter) { - continue; - } - ok = EncodeAlphaInternal(quant_alpha, width, height, - method, test_filter, reduce_levels, - effort_level, filtered_alpha, &tmp_bw, - pic->stats); - if (ok) { - const size_t score = VP8BitWriterSize(&tmp_bw); - if (score < best_score) { - // swap bitwriter objects. - VP8BitWriter tmp = tmp_bw; - tmp_bw = bw; - bw = tmp; - best_score = score; - if (pic->stats != NULL) best_stats = *pic->stats; - } - } else { - VP8BitWriterWipeOut(&bw); - } - VP8BitWriterWipeOut(&tmp_bw); - } - if (pic->stats != NULL) *pic->stats = best_stats; - } - Ok: - if (ok) { - *output_size = VP8BitWriterSize(&bw); - *output = VP8BitWriterBuf(&bw); - if (pic->stats != NULL) { // need stats? - pic->stats->coded_size += (int)(*output_size); - enc->sse_[3] = sse; - } - } - free(filtered_alpha); } - End: - free(quant_alpha); + + WebPSafeFree(quant_alpha); return ok; } - //------------------------------------------------------------------------------ // Main calls +static int CompressAlphaJob(VP8Encoder* const enc, void* dummy) { + const WebPConfig* config = enc->config_; + uint8_t* alpha_data = NULL; + size_t alpha_size = 0; + const int effort_level = config->method; // maps to [0..6] + const WEBP_FILTER_TYPE filter = + (config->alpha_filtering == 0) ? WEBP_FILTER_NONE : + (config->alpha_filtering == 1) ? WEBP_FILTER_FAST : + WEBP_FILTER_BEST; + if (!EncodeAlpha(enc, config->alpha_quality, config->alpha_compression, + filter, effort_level, &alpha_data, &alpha_size)) { + return 0; + } + if (alpha_size != (uint32_t)alpha_size) { // Sanity check. + WebPSafeFree(alpha_data); + return 0; + } + enc->alpha_data_size_ = (uint32_t)alpha_size; + enc->alpha_data_ = alpha_data; + (void)dummy; + return 1; +} + void VP8EncInitAlpha(VP8Encoder* const enc) { + WebPInitAlphaProcessing(); enc->has_alpha_ = WebPPictureHasTransparency(enc->pic_); enc->alpha_data_ = NULL; enc->alpha_data_size_ = 0; + if (enc->thread_level_ > 0) { + WebPWorker* const worker = &enc->alpha_worker_; + WebPGetWorkerInterface()->Init(worker); + worker->data1 = enc; + worker->data2 = NULL; + worker->hook = (WebPWorkerHook)CompressAlphaJob; + } } -int VP8EncFinishAlpha(VP8Encoder* const enc) { +int VP8EncStartAlpha(VP8Encoder* const enc) { if (enc->has_alpha_) { - const WebPConfig* config = enc->config_; - uint8_t* tmp_data = NULL; - size_t tmp_size = 0; - const int effort_level = config->method; // maps to [0..6] - const WEBP_FILTER_TYPE filter = - (config->alpha_filtering == 0) ? WEBP_FILTER_NONE : - (config->alpha_filtering == 1) ? WEBP_FILTER_FAST : - WEBP_FILTER_BEST; - - if (!EncodeAlpha(enc, config->alpha_quality, config->alpha_compression, - filter, effort_level, &tmp_data, &tmp_size)) { - return 0; + if (enc->thread_level_ > 0) { + WebPWorker* const worker = &enc->alpha_worker_; + // Makes sure worker is good to go. + if (!WebPGetWorkerInterface()->Reset(worker)) { + return 0; + } + WebPGetWorkerInterface()->Launch(worker); + return 1; + } else { + return CompressAlphaJob(enc, NULL); // just do the job right away } - if (tmp_size != (uint32_t)tmp_size) { // Sanity check. - free(tmp_data); - return 0; + } + return 1; +} + +int VP8EncFinishAlpha(VP8Encoder* const enc) { + if (enc->has_alpha_) { + if (enc->thread_level_ > 0) { + WebPWorker* const worker = &enc->alpha_worker_; + if (!WebPGetWorkerInterface()->Sync(worker)) return 0; // error } - enc->alpha_data_size_ = (uint32_t)tmp_size; - enc->alpha_data_ = tmp_data; } return WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_); } -void VP8EncDeleteAlpha(VP8Encoder* const enc) { - free(enc->alpha_data_); +int VP8EncDeleteAlpha(VP8Encoder* const enc) { + int ok = 1; + if (enc->thread_level_ > 0) { + WebPWorker* const worker = &enc->alpha_worker_; + // finish anything left in flight + ok = WebPGetWorkerInterface()->Sync(worker); + // still need to end the worker, even if !ok + WebPGetWorkerInterface()->End(worker); + } + WebPSafeFree(enc->alpha_data_); enc->alpha_data_ = NULL; enc->alpha_data_size_ = 0; enc->has_alpha_ = 0; + return ok; } - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/enc/analysis.c b/drivers/webp/enc/analysis.c index 22cfb492e7..b55128fd48 100644 --- a/drivers/webp/enc/analysis.c +++ b/drivers/webp/enc/analysis.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Macroblock analysis @@ -17,16 +19,8 @@ #include "./cost.h" #include "../utils/utils.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - #define MAX_ITERS_K_MEANS 6 -static int ClipAlpha(int alpha) { - return alpha < 0 ? 0 : alpha > 255 ? 255 : alpha; -} - //------------------------------------------------------------------------------ // Smooth the segment map by replacing isolated block by the majority of its // neighbours. @@ -36,7 +30,7 @@ static void SmoothSegmentMap(VP8Encoder* const enc) { const int w = enc->mb_w_; const int h = enc->mb_h_; const int majority_cnt_3_x_3_grid = 5; - uint8_t* const tmp = (uint8_t*)WebPSafeMalloc((uint64_t)w * h, sizeof(*tmp)); + uint8_t* const tmp = (uint8_t*)WebPSafeMalloc(w * h, sizeof(*tmp)); assert((uint64_t)(w * h) == (uint64_t)w * h); // no overflow, as per spec if (tmp == NULL) return; @@ -57,6 +51,7 @@ static void SmoothSegmentMap(VP8Encoder* const enc) { for (n = 0; n < NUM_MB_SEGMENTS; ++n) { if (cnt[n] >= majority_cnt_3_x_3_grid) { majority_seg = n; + break; } } tmp[x + y * w] = majority_seg; @@ -68,54 +63,14 @@ static void SmoothSegmentMap(VP8Encoder* const enc) { mb->segment_ = tmp[x + y * w]; } } - free(tmp); + WebPSafeFree(tmp); } //------------------------------------------------------------------------------ -// Finalize Segment probability based on the coding tree - -static int GetProba(int a, int b) { - int proba; - const int total = a + b; - if (total == 0) return 255; // that's the default probability. - proba = (255 * a + total / 2) / total; - return proba; -} - -static void SetSegmentProbas(VP8Encoder* const enc) { - int p[NUM_MB_SEGMENTS] = { 0 }; - int n; - - for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) { - const VP8MBInfo* const mb = &enc->mb_info_[n]; - p[mb->segment_]++; - } - if (enc->pic_->stats) { - for (n = 0; n < NUM_MB_SEGMENTS; ++n) { - enc->pic_->stats->segment_size[n] = p[n]; - } - } - if (enc->segment_hdr_.num_segments_ > 1) { - uint8_t* const probas = enc->proba_.segments_; - probas[0] = GetProba(p[0] + p[1], p[2] + p[3]); - probas[1] = GetProba(p[0], p[1]); - probas[2] = GetProba(p[2], p[3]); - - enc->segment_hdr_.update_map_ = - (probas[0] != 255) || (probas[1] != 255) || (probas[2] != 255); - enc->segment_hdr_.size_ = - p[0] * (VP8BitCost(0, probas[0]) + VP8BitCost(0, probas[1])) + - p[1] * (VP8BitCost(0, probas[0]) + VP8BitCost(1, probas[1])) + - p[2] * (VP8BitCost(1, probas[0]) + VP8BitCost(0, probas[2])) + - p[3] * (VP8BitCost(1, probas[0]) + VP8BitCost(1, probas[2])); - } else { - enc->segment_hdr_.update_map_ = 0; - enc->segment_hdr_.size_ = 0; - } -} +// set segment susceptibility alpha_ / beta_ static WEBP_INLINE int clip(int v, int m, int M) { - return v < m ? m : v > M ? M : v; + return (v < m) ? m : (v > M) ? M : v; } static void SetSegmentAlphas(VP8Encoder* const enc, @@ -142,28 +97,77 @@ static void SetSegmentAlphas(VP8Encoder* const enc, } //------------------------------------------------------------------------------ +// Compute susceptibility based on DCT-coeff histograms: +// the higher, the "easier" the macroblock is to compress. + +#define MAX_ALPHA 255 // 8b of precision for susceptibilities. +#define ALPHA_SCALE (2 * MAX_ALPHA) // scaling factor for alpha. +#define DEFAULT_ALPHA (-1) +#define IS_BETTER_ALPHA(alpha, best_alpha) ((alpha) > (best_alpha)) + +static int FinalAlphaValue(int alpha) { + alpha = MAX_ALPHA - alpha; + return clip(alpha, 0, MAX_ALPHA); +} + +static int GetAlpha(const VP8Histogram* const histo) { + // 'alpha' will later be clipped to [0..MAX_ALPHA] range, clamping outer + // values which happen to be mostly noise. This leaves the maximum precision + // for handling the useful small values which contribute most. + const int max_value = histo->max_value; + const int last_non_zero = histo->last_non_zero; + const int alpha = + (max_value > 1) ? ALPHA_SCALE * last_non_zero / max_value : 0; + return alpha; +} + +static void InitHistogram(VP8Histogram* const histo) { + histo->max_value = 0; + histo->last_non_zero = 1; +} + +static void MergeHistograms(const VP8Histogram* const in, + VP8Histogram* const out) { + if (in->max_value > out->max_value) { + out->max_value = in->max_value; + } + if (in->last_non_zero > out->last_non_zero) { + out->last_non_zero = in->last_non_zero; + } +} + +//------------------------------------------------------------------------------ // Simplified k-Means, to assign Nb segments based on alpha-histogram -static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { - const int nb = enc->segment_hdr_.num_segments_; +static void AssignSegments(VP8Encoder* const enc, + const int alphas[MAX_ALPHA + 1]) { + // 'num_segments_' is previously validated and <= NUM_MB_SEGMENTS, but an + // explicit check is needed to avoid spurious warning about 'n + 1' exceeding + // array bounds of 'centers' with some compilers (noticed with gcc-4.9). + const int nb = (enc->segment_hdr_.num_segments_ < NUM_MB_SEGMENTS) ? + enc->segment_hdr_.num_segments_ : NUM_MB_SEGMENTS; int centers[NUM_MB_SEGMENTS]; int weighted_average = 0; - int map[256]; + int map[MAX_ALPHA + 1]; int a, n, k; - int min_a = 0, max_a = 255, range_a; + int min_a = 0, max_a = MAX_ALPHA, range_a; // 'int' type is ok for histo, and won't overflow int accum[NUM_MB_SEGMENTS], dist_accum[NUM_MB_SEGMENTS]; + assert(nb >= 1); + assert(nb <= NUM_MB_SEGMENTS); + // bracket the input - for (n = 0; n < 256 && alphas[n] == 0; ++n) {} + for (n = 0; n <= MAX_ALPHA && alphas[n] == 0; ++n) {} min_a = n; - for (n = 255; n > min_a && alphas[n] == 0; --n) {} + for (n = MAX_ALPHA; n > min_a && alphas[n] == 0; --n) {} max_a = n; range_a = max_a - min_a; // Spread initial centers evenly - for (n = 1, k = 0; n < 2 * nb; n += 2) { - centers[k++] = min_a + (n * range_a) / (2 * nb); + for (k = 0, n = 1; k < nb; ++k, n += 2) { + assert(n < 2 * nb); + centers[k] = min_a + (n * range_a) / (2 * nb); } for (k = 0; k < MAX_ITERS_K_MEANS; ++k) { // few iters are enough @@ -178,7 +182,7 @@ static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { n = 0; // track the nearest center for current 'a' for (a = min_a; a <= max_a; ++a) { if (alphas[a]) { - while (n < nb - 1 && abs(a - centers[n + 1]) < abs(a - centers[n])) { + while (n + 1 < nb && abs(a - centers[n + 1]) < abs(a - centers[n])) { n++; } map[a] = n; @@ -210,7 +214,7 @@ static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { VP8MBInfo* const mb = &enc->mb_info_[n]; const int alpha = mb->alpha_; mb->segment_ = map[alpha]; - mb->alpha_ = centers[map[alpha]]; // just for the record. + mb->alpha_ = centers[map[alpha]]; // for the record. } if (nb > 1) { @@ -218,7 +222,6 @@ static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { if (smooth) SmoothSegmentMap(enc); } - SetSegmentProbas(enc); // Assign final proba SetSegmentAlphas(enc, centers, weighted_average); // pick some alphas. } @@ -227,24 +230,30 @@ static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { // susceptibility and set best modes for this macroblock. // Segment assignment is done later. -// Number of modes to inspect for alpha_ evaluation. For high-quality settings, -// we don't need to test all the possible modes during the analysis phase. +// Number of modes to inspect for alpha_ evaluation. We don't need to test all +// the possible modes during the analysis phase: we risk falling into a local +// optimum, or be subject to boundary effect #define MAX_INTRA16_MODE 2 #define MAX_INTRA4_MODE 2 #define MAX_UV_MODE 2 static int MBAnalyzeBestIntra16Mode(VP8EncIterator* const it) { - const int max_mode = (it->enc_->method_ >= 3) ? MAX_INTRA16_MODE : 4; + const int max_mode = MAX_INTRA16_MODE; int mode; - int best_alpha = -1; + int best_alpha = DEFAULT_ALPHA; int best_mode = 0; VP8MakeLuma16Preds(it); for (mode = 0; mode < max_mode; ++mode) { - const int alpha = VP8CollectHistogram(it->yuv_in_ + Y_OFF, - it->yuv_p_ + VP8I16ModeOffsets[mode], - 0, 16); - if (alpha > best_alpha) { + VP8Histogram histo; + int alpha; + + InitHistogram(&histo); + VP8CollectHistogram(it->yuv_in_ + Y_OFF_ENC, + it->yuv_p_ + VP8I16ModeOffsets[mode], + 0, 16, &histo); + alpha = GetAlpha(&histo); + if (IS_BETTER_ALPHA(alpha, best_alpha)) { best_alpha = alpha; best_mode = mode; } @@ -256,46 +265,62 @@ static int MBAnalyzeBestIntra16Mode(VP8EncIterator* const it) { static int MBAnalyzeBestIntra4Mode(VP8EncIterator* const it, int best_alpha) { uint8_t modes[16]; - const int max_mode = (it->enc_->method_ >= 3) ? MAX_INTRA4_MODE : NUM_BMODES; - int i4_alpha = 0; + const int max_mode = MAX_INTRA4_MODE; + int i4_alpha; + VP8Histogram total_histo; + int cur_histo = 0; + InitHistogram(&total_histo); + VP8IteratorStartI4(it); do { int mode; - int best_mode_alpha = -1; - const uint8_t* const src = it->yuv_in_ + Y_OFF + VP8Scan[it->i4_]; + int best_mode_alpha = DEFAULT_ALPHA; + VP8Histogram histos[2]; + const uint8_t* const src = it->yuv_in_ + Y_OFF_ENC + VP8Scan[it->i4_]; VP8MakeIntra4Preds(it); for (mode = 0; mode < max_mode; ++mode) { - const int alpha = VP8CollectHistogram(src, - it->yuv_p_ + VP8I4ModeOffsets[mode], - 0, 1); - if (alpha > best_mode_alpha) { + int alpha; + + InitHistogram(&histos[cur_histo]); + VP8CollectHistogram(src, it->yuv_p_ + VP8I4ModeOffsets[mode], + 0, 1, &histos[cur_histo]); + alpha = GetAlpha(&histos[cur_histo]); + if (IS_BETTER_ALPHA(alpha, best_mode_alpha)) { best_mode_alpha = alpha; modes[it->i4_] = mode; + cur_histo ^= 1; // keep track of best histo so far. } } - i4_alpha += best_mode_alpha; + // accumulate best histogram + MergeHistograms(&histos[cur_histo ^ 1], &total_histo); // Note: we reuse the original samples for predictors - } while (VP8IteratorRotateI4(it, it->yuv_in_ + Y_OFF)); + } while (VP8IteratorRotateI4(it, it->yuv_in_ + Y_OFF_ENC)); - if (i4_alpha > best_alpha) { + i4_alpha = GetAlpha(&total_histo); + if (IS_BETTER_ALPHA(i4_alpha, best_alpha)) { VP8SetIntra4Mode(it, modes); - best_alpha = ClipAlpha(i4_alpha); + best_alpha = i4_alpha; } return best_alpha; } static int MBAnalyzeBestUVMode(VP8EncIterator* const it) { - int best_alpha = -1; + int best_alpha = DEFAULT_ALPHA; int best_mode = 0; - const int max_mode = (it->enc_->method_ >= 3) ? MAX_UV_MODE : 4; + const int max_mode = MAX_UV_MODE; int mode; + VP8MakeChroma8Preds(it); for (mode = 0; mode < max_mode; ++mode) { - const int alpha = VP8CollectHistogram(it->yuv_in_ + U_OFF, - it->yuv_p_ + VP8UVModeOffsets[mode], - 16, 16 + 4 + 4); - if (alpha > best_alpha) { + VP8Histogram histo; + int alpha; + InitHistogram(&histo); + VP8CollectHistogram(it->yuv_in_ + U_OFF_ENC, + it->yuv_p_ + VP8UVModeOffsets[mode], + 16, 16 + 4 + 4, &histo); + alpha = GetAlpha(&histo); + if (IS_BETTER_ALPHA(alpha, best_alpha)) { best_alpha = alpha; best_mode = mode; } @@ -305,7 +330,8 @@ static int MBAnalyzeBestUVMode(VP8EncIterator* const it) { } static void MBAnalyze(VP8EncIterator* const it, - int alphas[256], int* const uv_alpha) { + int alphas[MAX_ALPHA + 1], + int* const alpha, int* const uv_alpha) { const VP8Encoder* const enc = it->enc_; int best_alpha, best_uv_alpha; @@ -314,7 +340,7 @@ static void MBAnalyze(VP8EncIterator* const it, VP8SetSegment(it, 0); // default segment, spec-wise. best_alpha = MBAnalyzeBestIntra16Mode(it); - if (enc->method_ != 3) { + if (enc->method_ >= 5) { // We go and make a fast decision for intra4/intra16. // It's usually not a good and definitive pick, but helps seeding the stats // about level bit-cost. @@ -324,10 +350,22 @@ static void MBAnalyze(VP8EncIterator* const it, best_uv_alpha = MBAnalyzeBestUVMode(it); // Final susceptibility mix - best_alpha = (best_alpha + best_uv_alpha + 1) / 2; + best_alpha = (3 * best_alpha + best_uv_alpha + 2) >> 2; + best_alpha = FinalAlphaValue(best_alpha); alphas[best_alpha]++; + it->mb_->alpha_ = best_alpha; // for later remapping. + + // Accumulate for later complexity analysis. + *alpha += best_alpha; // mixed susceptibility (not just luma) *uv_alpha += best_uv_alpha; - it->mb_->alpha_ = best_alpha; // Informative only. +} + +static void DefaultMBInfo(VP8MBInfo* const mb) { + mb->type_ = 1; // I16x16 + mb->uv_mode_ = 0; + mb->skip_ = 0; // not skipped + mb->segment_ = 0; // default segment + mb->alpha_ = 0; } //------------------------------------------------------------------------------ @@ -340,25 +378,124 @@ static void MBAnalyze(VP8EncIterator* const it, // and decide intra4/intra16, but that's usually almost always a bad choice at // this stage. -int VP8EncAnalyze(VP8Encoder* const enc) { - int ok = 1; - int alphas[256] = { 0 }; - VP8EncIterator it; - - VP8IteratorInit(enc, &it); +static void ResetAllMBInfo(VP8Encoder* const enc) { + int n; + for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) { + DefaultMBInfo(&enc->mb_info_[n]); + } + // Default susceptibilities. + enc->dqm_[0].alpha_ = 0; + enc->dqm_[0].beta_ = 0; + // Note: we can't compute this alpha_ / uv_alpha_ -> set to default value. + enc->alpha_ = 0; enc->uv_alpha_ = 0; - do { - VP8IteratorImport(&it); - MBAnalyze(&it, alphas, &enc->uv_alpha_); - ok = VP8IteratorProgress(&it, 20); - // Let's pretend we have perfect lossless reconstruction. - } while (ok && VP8IteratorNext(&it, it.yuv_in_)); - enc->uv_alpha_ /= enc->mb_w_ * enc->mb_h_; - if (ok) AssignSegments(enc, alphas); + WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_); +} + +// struct used to collect job result +typedef struct { + WebPWorker worker; + int alphas[MAX_ALPHA + 1]; + int alpha, uv_alpha; + VP8EncIterator it; + int delta_progress; +} SegmentJob; +// main work call +static int DoSegmentsJob(SegmentJob* const job, VP8EncIterator* const it) { + int ok = 1; + if (!VP8IteratorIsDone(it)) { + uint8_t tmp[32 + WEBP_ALIGN_CST]; + uint8_t* const scratch = (uint8_t*)WEBP_ALIGN(tmp); + do { + // Let's pretend we have perfect lossless reconstruction. + VP8IteratorImport(it, scratch); + MBAnalyze(it, job->alphas, &job->alpha, &job->uv_alpha); + ok = VP8IteratorProgress(it, job->delta_progress); + } while (ok && VP8IteratorNext(it)); + } return ok; } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" +static void MergeJobs(const SegmentJob* const src, SegmentJob* const dst) { + int i; + for (i = 0; i <= MAX_ALPHA; ++i) dst->alphas[i] += src->alphas[i]; + dst->alpha += src->alpha; + dst->uv_alpha += src->uv_alpha; +} + +// initialize the job struct with some TODOs +static void InitSegmentJob(VP8Encoder* const enc, SegmentJob* const job, + int start_row, int end_row) { + WebPGetWorkerInterface()->Init(&job->worker); + job->worker.data1 = job; + job->worker.data2 = &job->it; + job->worker.hook = (WebPWorkerHook)DoSegmentsJob; + VP8IteratorInit(enc, &job->it); + VP8IteratorSetRow(&job->it, start_row); + VP8IteratorSetCountDown(&job->it, (end_row - start_row) * enc->mb_w_); + memset(job->alphas, 0, sizeof(job->alphas)); + job->alpha = 0; + job->uv_alpha = 0; + // only one of both jobs can record the progress, since we don't + // expect the user's hook to be multi-thread safe + job->delta_progress = (start_row == 0) ? 20 : 0; +} + +// main entry point +int VP8EncAnalyze(VP8Encoder* const enc) { + int ok = 1; + const int do_segments = + enc->config_->emulate_jpeg_size || // We need the complexity evaluation. + (enc->segment_hdr_.num_segments_ > 1) || + (enc->method_ == 0); // for method 0, we need preds_[] to be filled. + if (do_segments) { + const int last_row = enc->mb_h_; + // We give a little more than a half work to the main thread. + const int split_row = (9 * last_row + 15) >> 4; + const int total_mb = last_row * enc->mb_w_; +#ifdef WEBP_USE_THREAD + const int kMinSplitRow = 2; // minimal rows needed for mt to be worth it + const int do_mt = (enc->thread_level_ > 0) && (split_row >= kMinSplitRow); +#else + const int do_mt = 0; #endif + const WebPWorkerInterface* const worker_interface = + WebPGetWorkerInterface(); + SegmentJob main_job; + if (do_mt) { + SegmentJob side_job; + // Note the use of '&' instead of '&&' because we must call the functions + // no matter what. + InitSegmentJob(enc, &main_job, 0, split_row); + InitSegmentJob(enc, &side_job, split_row, last_row); + // we don't need to call Reset() on main_job.worker, since we're calling + // WebPWorkerExecute() on it + ok &= worker_interface->Reset(&side_job.worker); + // launch the two jobs in parallel + if (ok) { + worker_interface->Launch(&side_job.worker); + worker_interface->Execute(&main_job.worker); + ok &= worker_interface->Sync(&side_job.worker); + ok &= worker_interface->Sync(&main_job.worker); + } + worker_interface->End(&side_job.worker); + if (ok) MergeJobs(&side_job, &main_job); // merge results together + } else { + // Even for single-thread case, we use the generic Worker tools. + InitSegmentJob(enc, &main_job, 0, last_row); + worker_interface->Execute(&main_job.worker); + ok &= worker_interface->Sync(&main_job.worker); + } + worker_interface->End(&main_job.worker); + if (ok) { + enc->alpha_ = main_job.alpha / total_mb; + enc->uv_alpha_ = main_job.uv_alpha / total_mb; + AssignSegments(enc, main_job.alphas); + } + } else { // Use only one default segment. + ResetAllMBInfo(enc); + } + return ok; +} + diff --git a/drivers/webp/enc/backward_references.c b/drivers/webp/enc/backward_references.c index b8c8ece806..049125e521 100644 --- a/drivers/webp/enc/backward_references.c +++ b/drivers/webp/enc/backward_references.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Author: Jyrki Alakuijala (jyrki@google.com) @@ -10,7 +12,6 @@ #include <assert.h> #include <math.h> -#include <stdio.h> #include "./backward_references.h" #include "./histogram.h" @@ -20,9 +21,9 @@ #define VALUES_IN_BYTE 256 -#define HASH_BITS 18 -#define HASH_SIZE (1 << HASH_BITS) -#define HASH_MULTIPLIER (0xc6a4a7935bd1e995ULL) +#define MIN_BLOCK_SIZE 256 // minimum block size for backward references + +#define MAX_ENTROPY (1e30f) // 1M window (4M bytes) minus 120 special codes for short distances. #define WINDOW_SIZE ((1 << 20) - 120) @@ -31,14 +32,6 @@ #define MIN_LENGTH 2 #define MAX_LENGTH 4096 -typedef struct { - // Stores the most recently added position with the given hash value. - int32_t hash_to_first_index_[HASH_SIZE]; - // chain_[pos] stores the previous position with the same hash value - // for every pixel in the image. - int32_t* chain_; -} HashChain; - // ----------------------------------------------------------------------------- static const uint8_t plane_to_code_lut[128] = { @@ -65,145 +58,275 @@ static int DistanceToPlaneCode(int xsize, int dist) { static WEBP_INLINE int FindMatchLength(const uint32_t* const array1, const uint32_t* const array2, - const int max_limit) { + int best_len_match, + int max_limit) { +#if !defined(__x86_64__) + // TODO(vrabaud): Compare on other architectures. int match_len = 0; + // Before 'expensive' linear match, check if the two arrays match at the + // current best length index. + if (array1[best_len_match] != array2[best_len_match]) return 0; while (match_len < max_limit && array1[match_len] == array2[match_len]) { ++match_len; } return match_len; +#else + const uint32_t* array1_32 = array1; + const uint32_t* array2_32 = array2; + // max value is aligned to (uint64_t*) array1 + const uint32_t* const array1_32_max = array1 + (max_limit & ~1); + + // Before 'expensive' linear match, check if the two arrays match at the + // current best length index. + if (array1[best_len_match] != array2[best_len_match]) return 0; + + // TODO(vrabaud): add __predict_true on bound checking? + while (array1_32 < array1_32_max) { + if (*(uint64_t*)array1_32 == *(uint64_t*)array2_32) { + array1_32 += 2; + array2_32 += 2; + } else { + // if the uint32_t pointed to are the same, then the following ones have + // to be different + return (array1_32 - array1) + (*array1_32 == *array2_32); + } + } + + // Deal with the potential last uint32_t. + if ((max_limit & 1) && (*array1_32 != *array2_32)) return max_limit - 1; + return max_limit; +#endif } // ----------------------------------------------------------------------------- // VP8LBackwardRefs -void VP8LInitBackwardRefs(VP8LBackwardRefs* const refs) { - if (refs != NULL) { - refs->refs = NULL; - refs->size = 0; - refs->max_size = 0; +struct PixOrCopyBlock { + PixOrCopyBlock* next_; // next block (or NULL) + PixOrCopy* start_; // data start + int size_; // currently used size +}; + +static void ClearBackwardRefs(VP8LBackwardRefs* const refs) { + assert(refs != NULL); + if (refs->tail_ != NULL) { + *refs->tail_ = refs->free_blocks_; // recycle all blocks at once } + refs->free_blocks_ = refs->refs_; + refs->tail_ = &refs->refs_; + refs->last_block_ = NULL; + refs->refs_ = NULL; } -void VP8LClearBackwardRefs(VP8LBackwardRefs* const refs) { - if (refs != NULL) { - free(refs->refs); - VP8LInitBackwardRefs(refs); +void VP8LBackwardRefsClear(VP8LBackwardRefs* const refs) { + assert(refs != NULL); + ClearBackwardRefs(refs); + while (refs->free_blocks_ != NULL) { + PixOrCopyBlock* const next = refs->free_blocks_->next_; + WebPSafeFree(refs->free_blocks_); + refs->free_blocks_ = next; } } -int VP8LBackwardRefsAlloc(VP8LBackwardRefs* const refs, int max_size) { +void VP8LBackwardRefsInit(VP8LBackwardRefs* const refs, int block_size) { assert(refs != NULL); - refs->size = 0; - refs->max_size = 0; - refs->refs = (PixOrCopy*)WebPSafeMalloc((uint64_t)max_size, - sizeof(*refs->refs)); - if (refs->refs == NULL) return 0; - refs->max_size = max_size; + memset(refs, 0, sizeof(*refs)); + refs->tail_ = &refs->refs_; + refs->block_size_ = + (block_size < MIN_BLOCK_SIZE) ? MIN_BLOCK_SIZE : block_size; +} + +VP8LRefsCursor VP8LRefsCursorInit(const VP8LBackwardRefs* const refs) { + VP8LRefsCursor c; + c.cur_block_ = refs->refs_; + if (refs->refs_ != NULL) { + c.cur_pos = c.cur_block_->start_; + c.last_pos_ = c.cur_pos + c.cur_block_->size_; + } else { + c.cur_pos = NULL; + c.last_pos_ = NULL; + } + return c; +} + +void VP8LRefsCursorNextBlock(VP8LRefsCursor* const c) { + PixOrCopyBlock* const b = c->cur_block_->next_; + c->cur_pos = (b == NULL) ? NULL : b->start_; + c->last_pos_ = (b == NULL) ? NULL : b->start_ + b->size_; + c->cur_block_ = b; +} + +// Create a new block, either from the free list or allocated +static PixOrCopyBlock* BackwardRefsNewBlock(VP8LBackwardRefs* const refs) { + PixOrCopyBlock* b = refs->free_blocks_; + if (b == NULL) { // allocate new memory chunk + const size_t total_size = + sizeof(*b) + refs->block_size_ * sizeof(*b->start_); + b = (PixOrCopyBlock*)WebPSafeMalloc(1ULL, total_size); + if (b == NULL) { + refs->error_ |= 1; + return NULL; + } + b->start_ = (PixOrCopy*)((uint8_t*)b + sizeof(*b)); // not always aligned + } else { // recycle from free-list + refs->free_blocks_ = b->next_; + } + *refs->tail_ = b; + refs->tail_ = &b->next_; + refs->last_block_ = b; + b->next_ = NULL; + b->size_ = 0; + return b; +} + +static WEBP_INLINE void BackwardRefsCursorAdd(VP8LBackwardRefs* const refs, + const PixOrCopy v) { + PixOrCopyBlock* b = refs->last_block_; + if (b == NULL || b->size_ == refs->block_size_) { + b = BackwardRefsNewBlock(refs); + if (b == NULL) return; // refs->error_ is set + } + b->start_[b->size_++] = v; +} + +int VP8LBackwardRefsCopy(const VP8LBackwardRefs* const src, + VP8LBackwardRefs* const dst) { + const PixOrCopyBlock* b = src->refs_; + ClearBackwardRefs(dst); + assert(src->block_size_ == dst->block_size_); + while (b != NULL) { + PixOrCopyBlock* const new_b = BackwardRefsNewBlock(dst); + if (new_b == NULL) return 0; // dst->error_ is set + memcpy(new_b->start_, b->start_, b->size_ * sizeof(*b->start_)); + new_b->size_ = b->size_; + b = b->next_; + } return 1; } // ----------------------------------------------------------------------------- // Hash chains -static WEBP_INLINE uint64_t GetPixPairHash64(const uint32_t* const argb) { - uint64_t key = ((uint64_t)(argb[1]) << 32) | argb[0]; - key = (key * HASH_MULTIPLIER) >> (64 - HASH_BITS); - return key; -} - -static int HashChainInit(HashChain* const p, int size) { +// initialize as empty +static void HashChainReset(VP8LHashChain* const p) { int i; - p->chain_ = (int*)WebPSafeMalloc((uint64_t)size, sizeof(*p->chain_)); - if (p->chain_ == NULL) { - return 0; - } - for (i = 0; i < size; ++i) { + assert(p != NULL); + for (i = 0; i < p->size_; ++i) { p->chain_[i] = -1; } for (i = 0; i < HASH_SIZE; ++i) { p->hash_to_first_index_[i] = -1; } +} + +int VP8LHashChainInit(VP8LHashChain* const p, int size) { + assert(p->size_ == 0); + assert(p->chain_ == NULL); + assert(size > 0); + p->chain_ = (int*)WebPSafeMalloc(size, sizeof(*p->chain_)); + if (p->chain_ == NULL) return 0; + p->size_ = size; + HashChainReset(p); return 1; } -static void HashChainDelete(HashChain* const p) { - if (p != NULL) { - free(p->chain_); - free(p); - } +void VP8LHashChainClear(VP8LHashChain* const p) { + assert(p != NULL); + WebPSafeFree(p->chain_); + p->size_ = 0; + p->chain_ = NULL; +} + +// ----------------------------------------------------------------------------- + +#define HASH_MULTIPLIER_HI (0xc6a4a793U) +#define HASH_MULTIPLIER_LO (0x5bd1e996U) + +static WEBP_INLINE uint32_t GetPixPairHash64(const uint32_t* const argb) { + uint32_t key; + key = argb[1] * HASH_MULTIPLIER_HI; + key += argb[0] * HASH_MULTIPLIER_LO; + key = key >> (32 - HASH_BITS); + return key; } // Insertion of two pixels at a time. -static void HashChainInsert(HashChain* const p, +static void HashChainInsert(VP8LHashChain* const p, const uint32_t* const argb, int pos) { - const uint64_t hash_code = GetPixPairHash64(argb); + const uint32_t hash_code = GetPixPairHash64(argb); p->chain_[pos] = p->hash_to_first_index_[hash_code]; p->hash_to_first_index_[hash_code] = pos; } -static int HashChainFindCopy(const HashChain* const p, - int quality, int index, int xsize, - const uint32_t* const argb, int maxlen, +// Returns the maximum number of hash chain lookups to do for a +// given compression quality. Return value in range [6, 86]. +static int GetMaxItersForQuality(int quality, int low_effort) { + return (low_effort ? 6 : 8) + (quality * quality) / 128; +} + +static int GetWindowSizeForHashChain(int quality, int xsize) { + const int max_window_size = (quality > 75) ? WINDOW_SIZE + : (quality > 50) ? (xsize << 8) + : (quality > 25) ? (xsize << 6) + : (xsize << 4); + assert(xsize > 0); + return (max_window_size > WINDOW_SIZE) ? WINDOW_SIZE : max_window_size; +} + +static WEBP_INLINE int MaxFindCopyLength(int len) { + return (len < MAX_LENGTH) ? len : MAX_LENGTH; +} + +static void HashChainFindOffset(const VP8LHashChain* const p, int base_position, + const uint32_t* const argb, int len, + int window_size, int* const distance_ptr) { + const uint32_t* const argb_start = argb + base_position; + const int min_pos = + (base_position > window_size) ? base_position - window_size : 0; + int pos; + assert(len <= MAX_LENGTH); + for (pos = p->hash_to_first_index_[GetPixPairHash64(argb_start)]; + pos >= min_pos; + pos = p->chain_[pos]) { + const int curr_length = + FindMatchLength(argb + pos, argb_start, len - 1, len); + if (curr_length == len) break; + } + *distance_ptr = base_position - pos; +} + +static int HashChainFindCopy(const VP8LHashChain* const p, + int base_position, + const uint32_t* const argb, int max_len, + int window_size, int iter_max, int* const distance_ptr, int* const length_ptr) { - const uint64_t hash_code = GetPixPairHash64(&argb[index]); - int prev_length = 0; - int64_t best_val = 0; + const uint32_t* const argb_start = argb + base_position; + int iter = iter_max; int best_length = 0; int best_distance = 0; - const uint32_t* const argb_start = argb + index; - const int iter_min_mult = (quality < 50) ? 2 : (quality < 75) ? 4 : 8; - const int iter_min = -quality * iter_min_mult; - int iter_cnt = 10 + (quality >> 1); - const int min_pos = (index > WINDOW_SIZE) ? index - WINDOW_SIZE : 0; + const int min_pos = + (base_position > window_size) ? base_position - window_size : 0; int pos; - - assert(xsize > 0); - for (pos = p->hash_to_first_index_[hash_code]; + int length_max = 256; + if (max_len < length_max) { + length_max = max_len; + } + for (pos = p->hash_to_first_index_[GetPixPairHash64(argb_start)]; pos >= min_pos; pos = p->chain_[pos]) { - int64_t val; int curr_length; - if (iter_cnt < 0) { - if (iter_cnt < iter_min || best_val >= 0xff0000) { - break; - } - } - --iter_cnt; - if (best_length != 0 && - argb[pos + best_length - 1] != argb_start[best_length - 1]) { - continue; - } - curr_length = FindMatchLength(argb + pos, argb_start, maxlen); - if (curr_length < prev_length) { - continue; + int distance; + if (--iter < 0) { + break; } - val = 65536 * curr_length; - // Favoring 2d locality here gives savings for certain images. - if (index - pos < 9 * xsize) { - const int y = (index - pos) / xsize; - int x = (index - pos) % xsize; - if (x > xsize / 2) { - x = xsize - x; - } - if (x <= 7 && x >= -8) { - val -= y * y + x * x; - } else { - val -= 9 * 9 + 9 * 9; - } - } else { - val -= 9 * 9 + 9 * 9; - } - if (best_val < val) { - prev_length = curr_length; - best_val = val; + + curr_length = FindMatchLength(argb + pos, argb_start, best_length, max_len); + if (best_length < curr_length) { + distance = base_position - pos; best_length = curr_length; - best_distance = index - pos; - if (curr_length >= MAX_LENGTH) { - break; - } - if ((best_distance == 1 || best_distance == xsize) && - best_length >= 128) { + best_distance = distance; + if (curr_length >= length_max) { break; } } @@ -213,140 +336,153 @@ static int HashChainFindCopy(const HashChain* const p, return (best_length >= MIN_LENGTH); } -static WEBP_INLINE void PushBackCopy(VP8LBackwardRefs* const refs, int length) { - int size = refs->size; - while (length >= MAX_LENGTH) { - refs->refs[size++] = PixOrCopyCreateCopy(1, MAX_LENGTH); - length -= MAX_LENGTH; - } - if (length > 0) { - refs->refs[size++] = PixOrCopyCreateCopy(1, length); +static WEBP_INLINE void AddSingleLiteral(uint32_t pixel, int use_color_cache, + VP8LColorCache* const hashers, + VP8LBackwardRefs* const refs) { + PixOrCopy v; + if (use_color_cache) { + const uint32_t key = VP8LColorCacheGetIndex(hashers, pixel); + if (VP8LColorCacheLookup(hashers, key) == pixel) { + v = PixOrCopyCreateCacheIdx(key); + } else { + v = PixOrCopyCreateLiteral(pixel); + VP8LColorCacheSet(hashers, key, pixel); + } + } else { + v = PixOrCopyCreateLiteral(pixel); } - refs->size = size; + BackwardRefsCursorAdd(refs, v); } -static void BackwardReferencesRle(int xsize, int ysize, - const uint32_t* const argb, - VP8LBackwardRefs* const refs) { +static int BackwardReferencesRle(int xsize, int ysize, + const uint32_t* const argb, + int cache_bits, VP8LBackwardRefs* const refs) { const int pix_count = xsize * ysize; - int match_len = 0; - int i; - refs->size = 0; - PushBackCopy(refs, match_len); // i=0 case - refs->refs[refs->size++] = PixOrCopyCreateLiteral(argb[0]); - for (i = 1; i < pix_count; ++i) { - if (argb[i] == argb[i - 1]) { - ++match_len; + int i, k; + const int use_color_cache = (cache_bits > 0); + VP8LColorCache hashers; + + if (use_color_cache && !VP8LColorCacheInit(&hashers, cache_bits)) { + return 0; + } + ClearBackwardRefs(refs); + // Add first pixel as literal. + AddSingleLiteral(argb[0], use_color_cache, &hashers, refs); + i = 1; + while (i < pix_count) { + const int max_len = MaxFindCopyLength(pix_count - i); + const int kMinLength = 4; + const int rle_len = FindMatchLength(argb + i, argb + i - 1, 0, max_len); + const int prev_row_len = (i < xsize) ? 0 : + FindMatchLength(argb + i, argb + i - xsize, 0, max_len); + if (rle_len >= prev_row_len && rle_len >= kMinLength) { + BackwardRefsCursorAdd(refs, PixOrCopyCreateCopy(1, rle_len)); + // We don't need to update the color cache here since it is always the + // same pixel being copied, and that does not change the color cache + // state. + i += rle_len; + } else if (prev_row_len >= kMinLength) { + BackwardRefsCursorAdd(refs, PixOrCopyCreateCopy(xsize, prev_row_len)); + if (use_color_cache) { + for (k = 0; k < prev_row_len; ++k) { + VP8LColorCacheInsert(&hashers, argb[i + k]); + } + } + i += prev_row_len; } else { - PushBackCopy(refs, match_len); - match_len = 0; - refs->refs[refs->size++] = PixOrCopyCreateLiteral(argb[i]); + AddSingleLiteral(argb[i], use_color_cache, &hashers, refs); + i++; } } - PushBackCopy(refs, match_len); + if (use_color_cache) VP8LColorCacheClear(&hashers); + return !refs->error_; } -static int BackwardReferencesHashChain(int xsize, int ysize, - const uint32_t* const argb, - int cache_bits, int quality, - VP8LBackwardRefs* const refs) { +static int BackwardReferencesLz77(int xsize, int ysize, + const uint32_t* const argb, int cache_bits, + int quality, int low_effort, + VP8LHashChain* const hash_chain, + VP8LBackwardRefs* const refs) { int i; int ok = 0; int cc_init = 0; const int use_color_cache = (cache_bits > 0); const int pix_count = xsize * ysize; - HashChain* const hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); VP8LColorCache hashers; + int iter_max = GetMaxItersForQuality(quality, low_effort); + const int window_size = GetWindowSizeForHashChain(quality, xsize); + int min_matches = 32; - if (hash_chain == NULL) return 0; if (use_color_cache) { cc_init = VP8LColorCacheInit(&hashers, cache_bits); if (!cc_init) goto Error; } - - if (!HashChainInit(hash_chain, pix_count)) goto Error; - - refs->size = 0; - for (i = 0; i < pix_count; ) { + ClearBackwardRefs(refs); + HashChainReset(hash_chain); + for (i = 0; i < pix_count - 2; ) { // Alternative#1: Code the pixels starting at 'i' using backward reference. int offset = 0; int len = 0; - if (i < pix_count - 1) { // FindCopy(i,..) reads pixels at [i] and [i + 1]. - int maxlen = pix_count - i; - if (maxlen > MAX_LENGTH) { - maxlen = MAX_LENGTH; - } - HashChainFindCopy(hash_chain, quality, i, xsize, argb, maxlen, - &offset, &len); - } - if (len >= MIN_LENGTH) { - // Alternative#2: Insert the pixel at 'i' as literal, and code the - // pixels starting at 'i + 1' using backward reference. + const int max_len = MaxFindCopyLength(pix_count - i); + HashChainFindCopy(hash_chain, i, argb, max_len, window_size, + iter_max, &offset, &len); + if (len > MIN_LENGTH || (len == MIN_LENGTH && offset <= 512)) { int offset2 = 0; int len2 = 0; int k; + min_matches = 8; HashChainInsert(hash_chain, &argb[i], i); - if (i < pix_count - 2) { // FindCopy(i+1,..) reads [i + 1] and [i + 2]. - int maxlen = pix_count - (i + 1); - if (maxlen > MAX_LENGTH) { - maxlen = MAX_LENGTH; - } - HashChainFindCopy(hash_chain, quality, - i + 1, xsize, argb, maxlen, &offset2, &len2); + if ((len < (max_len >> 2)) && !low_effort) { + // Evaluate Alternative#2: Insert the pixel at 'i' as literal, and code + // the pixels starting at 'i + 1' using backward reference. + HashChainFindCopy(hash_chain, i + 1, argb, max_len - 1, + window_size, iter_max, &offset2, + &len2); if (len2 > len + 1) { - const uint32_t pixel = argb[i]; - // Alternative#2 is a better match. So push pixel at 'i' as literal. - if (use_color_cache && VP8LColorCacheContains(&hashers, pixel)) { - const int ix = VP8LColorCacheGetIndex(&hashers, pixel); - refs->refs[refs->size] = PixOrCopyCreateCacheIdx(ix); - } else { - refs->refs[refs->size] = PixOrCopyCreateLiteral(pixel); - } - ++refs->size; - if (use_color_cache) VP8LColorCacheInsert(&hashers, pixel); + AddSingleLiteral(argb[i], use_color_cache, &hashers, refs); i++; // Backward reference to be done for next pixel. len = len2; offset = offset2; } } - if (len >= MAX_LENGTH) { - len = MAX_LENGTH - 1; - } - refs->refs[refs->size++] = PixOrCopyCreateCopy(offset, len); + BackwardRefsCursorAdd(refs, PixOrCopyCreateCopy(offset, len)); if (use_color_cache) { for (k = 0; k < len; ++k) { VP8LColorCacheInsert(&hashers, argb[i + k]); } } // Add to the hash_chain (but cannot add the last pixel). - { + if (offset >= 3 && offset != xsize) { const int last = (len < pix_count - 1 - i) ? len : pix_count - 1 - i; - for (k = 1; k < last; ++k) { + for (k = 2; k < last - 8; k += 2) { + HashChainInsert(hash_chain, &argb[i + k], i + k); + } + for (; k < last; ++k) { HashChainInsert(hash_chain, &argb[i + k], i + k); } } i += len; } else { - const uint32_t pixel = argb[i]; - if (use_color_cache && VP8LColorCacheContains(&hashers, pixel)) { - // push pixel as a PixOrCopyCreateCacheIdx pixel - const int ix = VP8LColorCacheGetIndex(&hashers, pixel); - refs->refs[refs->size] = PixOrCopyCreateCacheIdx(ix); - } else { - refs->refs[refs->size] = PixOrCopyCreateLiteral(pixel); - } - ++refs->size; - if (use_color_cache) VP8LColorCacheInsert(&hashers, pixel); - if (i + 1 < pix_count) { + AddSingleLiteral(argb[i], use_color_cache, &hashers, refs); + HashChainInsert(hash_chain, &argb[i], i); + ++i; + --min_matches; + if (min_matches <= 0) { + AddSingleLiteral(argb[i], use_color_cache, &hashers, refs); HashChainInsert(hash_chain, &argb[i], i); + ++i; } - ++i; } } - ok = 1; -Error: + while (i < pix_count) { + // Handle the last pixel(s). + AddSingleLiteral(argb[i], use_color_cache, &hashers, refs); + ++i; + } + + ok = !refs->error_; + Error: if (cc_init) VP8LColorCacheClear(&hashers); - HashChainDelete(hash_chain); return ok; } @@ -355,18 +491,19 @@ Error: typedef struct { double alpha_[VALUES_IN_BYTE]; double red_[VALUES_IN_BYTE]; - double literal_[PIX_OR_COPY_CODES_MAX]; double blue_[VALUES_IN_BYTE]; double distance_[NUM_DISTANCE_CODES]; + double* literal_; } CostModel; static int BackwardReferencesTraceBackwards( - int xsize, int ysize, int recursive_cost_model, - const uint32_t* const argb, int cache_bits, VP8LBackwardRefs* const refs); + int xsize, int ysize, const uint32_t* const argb, int quality, + int cache_bits, VP8LHashChain* const hash_chain, + VP8LBackwardRefs* const refs); static void ConvertPopulationCountTableToBitEstimates( - int num_symbols, const int population_counts[], double output[]) { - int sum = 0; + int num_symbols, const uint32_t population_counts[], double output[]) { + uint32_t sum = 0; int nonzeros = 0; int i; for (i = 0; i < num_symbols; ++i) { @@ -385,42 +522,29 @@ static void ConvertPopulationCountTableToBitEstimates( } } -static int CostModelBuild(CostModel* const m, int xsize, int ysize, - int recursion_level, const uint32_t* const argb, - int cache_bits) { +static int CostModelBuild(CostModel* const m, int cache_bits, + VP8LBackwardRefs* const refs) { int ok = 0; - VP8LHistogram histo; - VP8LBackwardRefs refs; - const int quality = 100; + VP8LHistogram* const histo = VP8LAllocateHistogram(cache_bits); + if (histo == NULL) goto Error; - if (!VP8LBackwardRefsAlloc(&refs, xsize * ysize)) goto Error; + VP8LHistogramCreate(histo, refs, cache_bits); - if (recursion_level > 0) { - if (!BackwardReferencesTraceBackwards(xsize, ysize, recursion_level - 1, - argb, cache_bits, &refs)) { - goto Error; - } - } else { - if (!BackwardReferencesHashChain(xsize, ysize, argb, cache_bits, quality, - &refs)) { - goto Error; - } - } - VP8LHistogramCreate(&histo, &refs, cache_bits); ConvertPopulationCountTableToBitEstimates( - VP8LHistogramNumCodes(&histo), histo.literal_, m->literal_); + VP8LHistogramNumCodes(histo->palette_code_bits_), + histo->literal_, m->literal_); ConvertPopulationCountTableToBitEstimates( - VALUES_IN_BYTE, histo.red_, m->red_); + VALUES_IN_BYTE, histo->red_, m->red_); ConvertPopulationCountTableToBitEstimates( - VALUES_IN_BYTE, histo.blue_, m->blue_); + VALUES_IN_BYTE, histo->blue_, m->blue_); ConvertPopulationCountTableToBitEstimates( - VALUES_IN_BYTE, histo.alpha_, m->alpha_); + VALUES_IN_BYTE, histo->alpha_, m->alpha_); ConvertPopulationCountTableToBitEstimates( - NUM_DISTANCE_CODES, histo.distance_, m->distance_); + NUM_DISTANCE_CODES, histo->distance_, m->distance_); ok = 1; Error: - VP8LClearBackwardRefs(&refs); + VP8LFreeHistogram(histo); return ok; } @@ -438,203 +562,211 @@ static WEBP_INLINE double GetCacheCost(const CostModel* const m, uint32_t idx) { static WEBP_INLINE double GetLengthCost(const CostModel* const m, uint32_t length) { - int code, extra_bits_count, extra_bits_value; - PrefixEncode(length, &code, &extra_bits_count, &extra_bits_value); - return m->literal_[VALUES_IN_BYTE + code] + extra_bits_count; + int code, extra_bits; + VP8LPrefixEncodeBits(length, &code, &extra_bits); + return m->literal_[VALUES_IN_BYTE + code] + extra_bits; } static WEBP_INLINE double GetDistanceCost(const CostModel* const m, uint32_t distance) { - int code, extra_bits_count, extra_bits_value; - PrefixEncode(distance, &code, &extra_bits_count, &extra_bits_value); - return m->distance_[code] + extra_bits_count; + int code, extra_bits; + VP8LPrefixEncodeBits(distance, &code, &extra_bits); + return m->distance_[code] + extra_bits; +} + +static void AddSingleLiteralWithCostModel( + const uint32_t* const argb, VP8LHashChain* const hash_chain, + VP8LColorCache* const hashers, const CostModel* const cost_model, int idx, + int is_last, int use_color_cache, double prev_cost, float* const cost, + uint16_t* const dist_array) { + double cost_val = prev_cost; + const uint32_t color = argb[0]; + if (!is_last) { + HashChainInsert(hash_chain, argb, idx); + } + if (use_color_cache && VP8LColorCacheContains(hashers, color)) { + const double mul0 = 0.68; + const int ix = VP8LColorCacheGetIndex(hashers, color); + cost_val += GetCacheCost(cost_model, ix) * mul0; + } else { + const double mul1 = 0.82; + if (use_color_cache) VP8LColorCacheInsert(hashers, color); + cost_val += GetLiteralCost(cost_model, color) * mul1; + } + if (cost[idx] > cost_val) { + cost[idx] = (float)cost_val; + dist_array[idx] = 1; // only one is inserted. + } } static int BackwardReferencesHashChainDistanceOnly( - int xsize, int ysize, int recursive_cost_model, const uint32_t* const argb, - int cache_bits, uint32_t* const dist_array) { + int xsize, int ysize, const uint32_t* const argb, + int quality, int cache_bits, VP8LHashChain* const hash_chain, + VP8LBackwardRefs* const refs, uint16_t* const dist_array) { int i; int ok = 0; int cc_init = 0; - const int quality = 100; const int pix_count = xsize * ysize; const int use_color_cache = (cache_bits > 0); - double* const cost = - (double*)WebPSafeMalloc((uint64_t)pix_count, sizeof(*cost)); - CostModel* cost_model = (CostModel*)malloc(sizeof(*cost_model)); - HashChain* hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); + float* const cost = + (float*)WebPSafeMalloc(pix_count, sizeof(*cost)); + const size_t literal_array_size = sizeof(double) * + (NUM_LITERAL_CODES + NUM_LENGTH_CODES + + ((cache_bits > 0) ? (1 << cache_bits) : 0)); + const size_t cost_model_size = sizeof(CostModel) + literal_array_size; + CostModel* const cost_model = + (CostModel*)WebPSafeMalloc(1ULL, cost_model_size); VP8LColorCache hashers; - const double mul0 = (recursive_cost_model != 0) ? 1.0 : 0.68; - const double mul1 = (recursive_cost_model != 0) ? 1.0 : 0.82; - - if (cost == NULL || cost_model == NULL || hash_chain == NULL) goto Error; + const int skip_length = 32 + quality; + const int skip_min_distance_code = 2; + int iter_max = GetMaxItersForQuality(quality, 0); + const int window_size = GetWindowSizeForHashChain(quality, xsize); - if (!HashChainInit(hash_chain, pix_count)) goto Error; + if (cost == NULL || cost_model == NULL) goto Error; + cost_model->literal_ = (double*)(cost_model + 1); if (use_color_cache) { cc_init = VP8LColorCacheInit(&hashers, cache_bits); if (!cc_init) goto Error; } - if (!CostModelBuild(cost_model, xsize, ysize, recursive_cost_model, argb, - cache_bits)) { + if (!CostModelBuild(cost_model, cache_bits, refs)) { goto Error; } - for (i = 0; i < pix_count; ++i) cost[i] = 1e100; + for (i = 0; i < pix_count; ++i) cost[i] = 1e38f; // We loop one pixel at a time, but store all currently best points to // non-processed locations from this point. dist_array[0] = 0; - for (i = 0; i < pix_count; ++i) { - double prev_cost = 0.0; - int shortmax; - if (i > 0) { - prev_cost = cost[i - 1]; - } - for (shortmax = 0; shortmax < 2; ++shortmax) { - int offset = 0; - int len = 0; - if (i < pix_count - 1) { // FindCopy reads pixels at [i] and [i + 1]. - int maxlen = shortmax ? 2 : MAX_LENGTH; - if (maxlen > pix_count - i) { - maxlen = pix_count - i; + HashChainReset(hash_chain); + // Add first pixel as literal. + AddSingleLiteralWithCostModel(argb + 0, hash_chain, &hashers, cost_model, 0, + 0, use_color_cache, 0.0, cost, dist_array); + for (i = 1; i < pix_count - 1; ++i) { + int offset = 0; + int len = 0; + double prev_cost = cost[i - 1]; + const int max_len = MaxFindCopyLength(pix_count - i); + HashChainFindCopy(hash_chain, i, argb, max_len, window_size, + iter_max, &offset, &len); + if (len >= MIN_LENGTH) { + const int code = DistanceToPlaneCode(xsize, offset); + const double distance_cost = + prev_cost + GetDistanceCost(cost_model, code); + int k; + for (k = 1; k < len; ++k) { + const double cost_val = distance_cost + GetLengthCost(cost_model, k); + if (cost[i + k] > cost_val) { + cost[i + k] = (float)cost_val; + dist_array[i + k] = k + 1; } - HashChainFindCopy(hash_chain, quality, i, xsize, argb, maxlen, - &offset, &len); } - if (len >= MIN_LENGTH) { - const int code = DistanceToPlaneCode(xsize, offset); - const double distance_cost = - prev_cost + GetDistanceCost(cost_model, code); - int k; - for (k = 1; k < len; ++k) { - const double cost_val = - distance_cost + GetLengthCost(cost_model, k); - if (cost[i + k] > cost_val) { - cost[i + k] = cost_val; - dist_array[i + k] = k + 1; + // This if is for speedup only. It roughly doubles the speed, and + // makes compression worse by .1 %. + if (len >= skip_length && code <= skip_min_distance_code) { + // Long copy for short distances, let's skip the middle + // lookups for better copies. + // 1) insert the hashes. + if (use_color_cache) { + for (k = 0; k < len; ++k) { + VP8LColorCacheInsert(&hashers, argb[i + k]); } } - // This if is for speedup only. It roughly doubles the speed, and - // makes compression worse by .1 %. - if (len >= 128 && code < 2) { - // Long copy for short distances, let's skip the middle - // lookups for better copies. - // 1) insert the hashes. - if (use_color_cache) { - for (k = 0; k < len; ++k) { - VP8LColorCacheInsert(&hashers, argb[i + k]); - } - } - // 2) Add to the hash_chain (but cannot add the last pixel) - { - const int last = (len < pix_count - 1 - i) ? len - : pix_count - 1 - i; - for (k = 0; k < last; ++k) { - HashChainInsert(hash_chain, &argb[i + k], i + k); - } + // 2) Add to the hash_chain (but cannot add the last pixel) + { + const int last = (len + i < pix_count - 1) ? len + i + : pix_count - 1; + for (k = i; k < last; ++k) { + HashChainInsert(hash_chain, &argb[k], k); } - // 3) jump. - i += len - 1; // for loop does ++i, thus -1 here. - goto next_symbol; } + // 3) jump. + i += len - 1; // for loop does ++i, thus -1 here. + goto next_symbol; } - } - if (i < pix_count - 1) { - HashChainInsert(hash_chain, &argb[i], i); - } - { - // inserting a literal pixel - double cost_val = prev_cost; - if (use_color_cache && VP8LColorCacheContains(&hashers, argb[i])) { - const int ix = VP8LColorCacheGetIndex(&hashers, argb[i]); - cost_val += GetCacheCost(cost_model, ix) * mul0; - } else { - cost_val += GetLiteralCost(cost_model, argb[i]) * mul1; - } - if (cost[i] > cost_val) { - cost[i] = cost_val; - dist_array[i] = 1; // only one is inserted. + if (len != MIN_LENGTH) { + int code_min_length; + double cost_total; + HashChainFindOffset(hash_chain, i, argb, MIN_LENGTH, window_size, + &offset); + code_min_length = DistanceToPlaneCode(xsize, offset); + cost_total = prev_cost + + GetDistanceCost(cost_model, code_min_length) + + GetLengthCost(cost_model, 1); + if (cost[i + 1] > cost_total) { + cost[i + 1] = (float)cost_total; + dist_array[i + 1] = 2; + } } - if (use_color_cache) VP8LColorCacheInsert(&hashers, argb[i]); } + AddSingleLiteralWithCostModel(argb + i, hash_chain, &hashers, cost_model, i, + 0, use_color_cache, prev_cost, cost, + dist_array); next_symbol: ; } - // Last pixel still to do, it can only be a single step if not reached - // through cheaper means already. - ok = 1; -Error: + // Handle the last pixel. + if (i == (pix_count - 1)) { + AddSingleLiteralWithCostModel(argb + i, hash_chain, &hashers, cost_model, i, + 1, use_color_cache, cost[pix_count - 2], cost, + dist_array); + } + ok = !refs->error_; + Error: if (cc_init) VP8LColorCacheClear(&hashers); - HashChainDelete(hash_chain); - free(cost_model); - free(cost); + WebPSafeFree(cost_model); + WebPSafeFree(cost); return ok; } -static int TraceBackwards(const uint32_t* const dist_array, - int dist_array_size, - uint32_t** const chosen_path, - int* const chosen_path_size) { - int i; - // Count how many. - int count = 0; - for (i = dist_array_size - 1; i >= 0; ) { - int k = dist_array[i]; - assert(k >= 1); - ++count; - i -= k; - } - // Allocate. - *chosen_path_size = count; - *chosen_path = - (uint32_t*)WebPSafeMalloc((uint64_t)count, sizeof(**chosen_path)); - if (*chosen_path == NULL) return 0; - - // Write in reverse order. - for (i = dist_array_size - 1; i >= 0; ) { - int k = dist_array[i]; - assert(k >= 1); - (*chosen_path)[--count] = k; - i -= k; +// We pack the path at the end of *dist_array and return +// a pointer to this part of the array. Example: +// dist_array = [1x2xx3x2] => packed [1x2x1232], chosen_path = [1232] +static void TraceBackwards(uint16_t* const dist_array, + int dist_array_size, + uint16_t** const chosen_path, + int* const chosen_path_size) { + uint16_t* path = dist_array + dist_array_size; + uint16_t* cur = dist_array + dist_array_size - 1; + while (cur >= dist_array) { + const int k = *cur; + --path; + *path = k; + cur -= k; } - return 1; + *chosen_path = path; + *chosen_path_size = (int)(dist_array + dist_array_size - path); } static int BackwardReferencesHashChainFollowChosenPath( - int xsize, int ysize, const uint32_t* const argb, int cache_bits, - const uint32_t* const chosen_path, int chosen_path_size, + int xsize, int ysize, const uint32_t* const argb, + int quality, int cache_bits, + const uint16_t* const chosen_path, int chosen_path_size, + VP8LHashChain* const hash_chain, VP8LBackwardRefs* const refs) { - const int quality = 100; const int pix_count = xsize * ysize; const int use_color_cache = (cache_bits > 0); - int size = 0; - int i = 0; - int k; int ix; + int i = 0; int ok = 0; int cc_init = 0; - HashChain* hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); + const int window_size = GetWindowSizeForHashChain(quality, xsize); VP8LColorCache hashers; - if (hash_chain == NULL || !HashChainInit(hash_chain, pix_count)) { - goto Error; - } if (use_color_cache) { cc_init = VP8LColorCacheInit(&hashers, cache_bits); if (!cc_init) goto Error; } - refs->size = 0; - for (ix = 0; ix < chosen_path_size; ++ix, ++size) { + ClearBackwardRefs(refs); + HashChainReset(hash_chain); + for (ix = 0; ix < chosen_path_size; ++ix) { int offset = 0; - int len = 0; - int maxlen = chosen_path[ix]; - if (maxlen != 1) { - HashChainFindCopy(hash_chain, quality, - i, xsize, argb, maxlen, &offset, &len); - assert(len == maxlen); - refs->refs[size] = PixOrCopyCreateCopy(offset, len); + const int len = chosen_path[ix]; + if (len != 1) { + int k; + HashChainFindOffset(hash_chain, i, argb, len, window_size, &offset); + BackwardRefsCursorAdd(refs, PixOrCopyCreateCopy(offset, len)); if (use_color_cache) { for (k = 0; k < len; ++k) { VP8LColorCacheInsert(&hashers, argb[i + k]); @@ -648,227 +780,330 @@ static int BackwardReferencesHashChainFollowChosenPath( } i += len; } else { + PixOrCopy v; if (use_color_cache && VP8LColorCacheContains(&hashers, argb[i])) { // push pixel as a color cache index const int idx = VP8LColorCacheGetIndex(&hashers, argb[i]); - refs->refs[size] = PixOrCopyCreateCacheIdx(idx); + v = PixOrCopyCreateCacheIdx(idx); } else { - refs->refs[size] = PixOrCopyCreateLiteral(argb[i]); + if (use_color_cache) VP8LColorCacheInsert(&hashers, argb[i]); + v = PixOrCopyCreateLiteral(argb[i]); } - if (use_color_cache) VP8LColorCacheInsert(&hashers, argb[i]); + BackwardRefsCursorAdd(refs, v); if (i + 1 < pix_count) { HashChainInsert(hash_chain, &argb[i], i); } ++i; } } - assert(size <= refs->max_size); - refs->size = size; - ok = 1; -Error: + ok = !refs->error_; + Error: if (cc_init) VP8LColorCacheClear(&hashers); - HashChainDelete(hash_chain); return ok; } // Returns 1 on success. static int BackwardReferencesTraceBackwards(int xsize, int ysize, - int recursive_cost_model, const uint32_t* const argb, - int cache_bits, + int quality, int cache_bits, + VP8LHashChain* const hash_chain, VP8LBackwardRefs* const refs) { int ok = 0; const int dist_array_size = xsize * ysize; - uint32_t* chosen_path = NULL; + uint16_t* chosen_path = NULL; int chosen_path_size = 0; - uint32_t* dist_array = - (uint32_t*)WebPSafeMalloc((uint64_t)dist_array_size, sizeof(*dist_array)); + uint16_t* dist_array = + (uint16_t*)WebPSafeMalloc(dist_array_size, sizeof(*dist_array)); if (dist_array == NULL) goto Error; if (!BackwardReferencesHashChainDistanceOnly( - xsize, ysize, recursive_cost_model, argb, cache_bits, dist_array)) { - goto Error; - } - if (!TraceBackwards(dist_array, dist_array_size, - &chosen_path, &chosen_path_size)) { + xsize, ysize, argb, quality, cache_bits, hash_chain, + refs, dist_array)) { goto Error; } - free(dist_array); // no need to retain this memory any longer - dist_array = NULL; + TraceBackwards(dist_array, dist_array_size, &chosen_path, &chosen_path_size); if (!BackwardReferencesHashChainFollowChosenPath( - xsize, ysize, argb, cache_bits, chosen_path, chosen_path_size, refs)) { + xsize, ysize, argb, quality, cache_bits, chosen_path, chosen_path_size, + hash_chain, refs)) { goto Error; } ok = 1; Error: - free(chosen_path); - free(dist_array); + WebPSafeFree(dist_array); return ok; } static void BackwardReferences2DLocality(int xsize, - VP8LBackwardRefs* const refs) { - int i; - for (i = 0; i < refs->size; ++i) { - if (PixOrCopyIsCopy(&refs->refs[i])) { - const int dist = refs->refs[i].argb_or_distance; + const VP8LBackwardRefs* const refs) { + VP8LRefsCursor c = VP8LRefsCursorInit(refs); + while (VP8LRefsCursorOk(&c)) { + if (PixOrCopyIsCopy(c.cur_pos)) { + const int dist = c.cur_pos->argb_or_distance; const int transformed_dist = DistanceToPlaneCode(xsize, dist); - refs->refs[i].argb_or_distance = transformed_dist; + c.cur_pos->argb_or_distance = transformed_dist; } + VP8LRefsCursorNext(&c); } } -int VP8LGetBackwardReferences(int width, int height, - const uint32_t* const argb, - int quality, int cache_bits, int use_2d_locality, - VP8LBackwardRefs* const best) { - int ok = 0; - int lz77_is_useful; - VP8LBackwardRefs refs_rle, refs_lz77; - const int num_pix = width * height; - - VP8LBackwardRefsAlloc(&refs_rle, num_pix); - VP8LBackwardRefsAlloc(&refs_lz77, num_pix); - VP8LInitBackwardRefs(best); - if (refs_rle.refs == NULL || refs_lz77.refs == NULL) { - Error1: - VP8LClearBackwardRefs(&refs_rle); - VP8LClearBackwardRefs(&refs_lz77); - goto End; - } - - if (!BackwardReferencesHashChain(width, height, argb, cache_bits, quality, - &refs_lz77)) { - goto End; - } - // Backward Reference using RLE only. - BackwardReferencesRle(width, height, argb, &refs_rle); +// Returns entropy for the given cache bits. +static double ComputeCacheEntropy(const uint32_t* argb, + const VP8LBackwardRefs* const refs, + int cache_bits) { + const int use_color_cache = (cache_bits > 0); + int cc_init = 0; + double entropy = MAX_ENTROPY; + const double kSmallPenaltyForLargeCache = 4.0; + VP8LColorCache hashers; + VP8LRefsCursor c = VP8LRefsCursorInit(refs); + VP8LHistogram* histo = VP8LAllocateHistogram(cache_bits); + if (histo == NULL) goto Error; - { - double bit_cost_lz77, bit_cost_rle; - VP8LHistogram* const histo = (VP8LHistogram*)malloc(sizeof(*histo)); - if (histo == NULL) goto Error1; - // Evaluate lz77 coding - VP8LHistogramCreate(histo, &refs_lz77, cache_bits); - bit_cost_lz77 = VP8LHistogramEstimateBits(histo); - // Evaluate RLE coding - VP8LHistogramCreate(histo, &refs_rle, cache_bits); - bit_cost_rle = VP8LHistogramEstimateBits(histo); - // Decide if LZ77 is useful. - lz77_is_useful = (bit_cost_lz77 < bit_cost_rle); - free(histo); + if (use_color_cache) { + cc_init = VP8LColorCacheInit(&hashers, cache_bits); + if (!cc_init) goto Error; } - - // Choose appropriate backward reference. - if (lz77_is_useful) { - // TraceBackwards is costly. Run it for higher qualities. - const int try_lz77_trace_backwards = (quality >= 75); - *best = refs_lz77; // default guess: lz77 is better - VP8LClearBackwardRefs(&refs_rle); - if (try_lz77_trace_backwards) { - const int recursion_level = (num_pix < 320 * 200) ? 1 : 0; - VP8LBackwardRefs refs_trace; - if (!VP8LBackwardRefsAlloc(&refs_trace, num_pix)) { - goto End; - } - if (BackwardReferencesTraceBackwards( - width, height, recursion_level, argb, cache_bits, &refs_trace)) { - VP8LClearBackwardRefs(&refs_lz77); - *best = refs_trace; - } + if (!use_color_cache) { + while (VP8LRefsCursorOk(&c)) { + VP8LHistogramAddSinglePixOrCopy(histo, c.cur_pos); + VP8LRefsCursorNext(&c); } } else { - VP8LClearBackwardRefs(&refs_lz77); - *best = refs_rle; + while (VP8LRefsCursorOk(&c)) { + const PixOrCopy* const v = c.cur_pos; + if (PixOrCopyIsLiteral(v)) { + const uint32_t pix = *argb++; + const uint32_t key = VP8LColorCacheGetIndex(&hashers, pix); + if (VP8LColorCacheLookup(&hashers, key) == pix) { + ++histo->literal_[NUM_LITERAL_CODES + NUM_LENGTH_CODES + key]; + } else { + VP8LColorCacheSet(&hashers, key, pix); + ++histo->blue_[pix & 0xff]; + ++histo->literal_[(pix >> 8) & 0xff]; + ++histo->red_[(pix >> 16) & 0xff]; + ++histo->alpha_[pix >> 24]; + } + } else { + int len = PixOrCopyLength(v); + int code, extra_bits; + VP8LPrefixEncodeBits(len, &code, &extra_bits); + ++histo->literal_[NUM_LITERAL_CODES + code]; + VP8LPrefixEncodeBits(PixOrCopyDistance(v), &code, &extra_bits); + ++histo->distance_[code]; + do { + VP8LColorCacheInsert(&hashers, *argb++); + } while(--len != 0); + } + VP8LRefsCursorNext(&c); + } } + entropy = VP8LHistogramEstimateBits(histo) + + kSmallPenaltyForLargeCache * cache_bits; + Error: + if (cc_init) VP8LColorCacheClear(&hashers); + VP8LFreeHistogram(histo); + return entropy; +} - if (use_2d_locality) BackwardReferences2DLocality(width, best); - - ok = 1; - - End: - if (!ok) { - VP8LClearBackwardRefs(best); +// Evaluate optimal cache bits for the local color cache. +// The input *best_cache_bits sets the maximum cache bits to use (passing 0 +// implies disabling the local color cache). The local color cache is also +// disabled for the lower (<= 25) quality. +// Returns 0 in case of memory error. +static int CalculateBestCacheSize(const uint32_t* const argb, + int xsize, int ysize, int quality, + VP8LHashChain* const hash_chain, + VP8LBackwardRefs* const refs, + int* const lz77_computed, + int* const best_cache_bits) { + int eval_low = 1; + int eval_high = 1; + double entropy_low = MAX_ENTROPY; + double entropy_high = MAX_ENTROPY; + const double cost_mul = 5e-4; + int cache_bits_low = 0; + int cache_bits_high = (quality <= 25) ? 0 : *best_cache_bits; + + assert(cache_bits_high <= MAX_COLOR_CACHE_BITS); + + *lz77_computed = 0; + if (cache_bits_high == 0) { + *best_cache_bits = 0; + // Local color cache is disabled. + return 1; } - return ok; + if (!BackwardReferencesLz77(xsize, ysize, argb, cache_bits_low, quality, 0, + hash_chain, refs)) { + return 0; + } + // Do a binary search to find the optimal entropy for cache_bits. + while (eval_low || eval_high) { + if (eval_low) { + entropy_low = ComputeCacheEntropy(argb, refs, cache_bits_low); + entropy_low += entropy_low * cache_bits_low * cost_mul; + eval_low = 0; + } + if (eval_high) { + entropy_high = ComputeCacheEntropy(argb, refs, cache_bits_high); + entropy_high += entropy_high * cache_bits_high * cost_mul; + eval_high = 0; + } + if (entropy_high < entropy_low) { + const int prev_cache_bits_low = cache_bits_low; + *best_cache_bits = cache_bits_high; + cache_bits_low = (cache_bits_low + cache_bits_high) / 2; + if (cache_bits_low != prev_cache_bits_low) eval_low = 1; + } else { + *best_cache_bits = cache_bits_low; + cache_bits_high = (cache_bits_low + cache_bits_high) / 2; + if (cache_bits_high != cache_bits_low) eval_high = 1; + } + } + *lz77_computed = 1; + return 1; } -// Returns 1 on success. -static int ComputeCacheHistogram(const uint32_t* const argb, - int xsize, int ysize, - const VP8LBackwardRefs* const refs, - int cache_bits, - VP8LHistogram* const histo) { +// Update (in-place) backward references for specified cache_bits. +static int BackwardRefsWithLocalCache(const uint32_t* const argb, + int cache_bits, + VP8LBackwardRefs* const refs) { int pixel_index = 0; - int i; - uint32_t k; VP8LColorCache hashers; - const int use_color_cache = (cache_bits > 0); - int cc_init = 0; + VP8LRefsCursor c = VP8LRefsCursorInit(refs); + if (!VP8LColorCacheInit(&hashers, cache_bits)) return 0; - if (use_color_cache) { - cc_init = VP8LColorCacheInit(&hashers, cache_bits); - if (!cc_init) return 0; - } - - for (i = 0; i < refs->size; ++i) { - const PixOrCopy* const v = &refs->refs[i]; + while (VP8LRefsCursorOk(&c)) { + PixOrCopy* const v = c.cur_pos; if (PixOrCopyIsLiteral(v)) { - if (use_color_cache && - VP8LColorCacheContains(&hashers, argb[pixel_index])) { - // push pixel as a cache index - const int ix = VP8LColorCacheGetIndex(&hashers, argb[pixel_index]); - const PixOrCopy token = PixOrCopyCreateCacheIdx(ix); - VP8LHistogramAddSinglePixOrCopy(histo, &token); + const uint32_t argb_literal = v->argb_or_distance; + if (VP8LColorCacheContains(&hashers, argb_literal)) { + const int ix = VP8LColorCacheGetIndex(&hashers, argb_literal); + *v = PixOrCopyCreateCacheIdx(ix); } else { - VP8LHistogramAddSinglePixOrCopy(histo, v); + VP8LColorCacheInsert(&hashers, argb_literal); } + ++pixel_index; } else { - VP8LHistogramAddSinglePixOrCopy(histo, v); - } - if (use_color_cache) { - for (k = 0; k < PixOrCopyLength(v); ++k) { - VP8LColorCacheInsert(&hashers, argb[pixel_index + k]); + // refs was created without local cache, so it can not have cache indexes. + int k; + assert(PixOrCopyIsCopy(v)); + for (k = 0; k < v->len; ++k) { + VP8LColorCacheInsert(&hashers, argb[pixel_index++]); } } - pixel_index += PixOrCopyLength(v); + VP8LRefsCursorNext(&c); } - assert(pixel_index == xsize * ysize); - (void)xsize; // xsize is not used in non-debug compilations otherwise. - (void)ysize; // ysize is not used in non-debug compilations otherwise. - if (cc_init) VP8LColorCacheClear(&hashers); + VP8LColorCacheClear(&hashers); return 1; } -// Returns how many bits are to be used for a color cache. -int VP8LCalculateEstimateForCacheSize(const uint32_t* const argb, - int xsize, int ysize, - int* const best_cache_bits) { - int ok = 0; - int cache_bits; - double lowest_entropy = 1e99; - VP8LBackwardRefs refs; - static const double kSmallPenaltyForLargeCache = 4.0; - static const int quality = 30; - if (!VP8LBackwardRefsAlloc(&refs, xsize * ysize) || - !BackwardReferencesHashChain(xsize, ysize, argb, 0, quality, &refs)) { +static VP8LBackwardRefs* GetBackwardReferencesLowEffort( + int width, int height, const uint32_t* const argb, int quality, + int* const cache_bits, VP8LHashChain* const hash_chain, + VP8LBackwardRefs refs_array[2]) { + VP8LBackwardRefs* refs_lz77 = &refs_array[0]; + *cache_bits = 0; + if (!BackwardReferencesLz77(width, height, argb, 0, quality, + 1 /* Low effort. */, hash_chain, refs_lz77)) { + return NULL; + } + BackwardReferences2DLocality(width, refs_lz77); + return refs_lz77; +} + +static VP8LBackwardRefs* GetBackwardReferences( + int width, int height, const uint32_t* const argb, int quality, + int* const cache_bits, VP8LHashChain* const hash_chain, + VP8LBackwardRefs refs_array[2]) { + int lz77_is_useful; + int lz77_computed; + double bit_cost_lz77, bit_cost_rle; + VP8LBackwardRefs* best = NULL; + VP8LBackwardRefs* refs_lz77 = &refs_array[0]; + VP8LBackwardRefs* refs_rle = &refs_array[1]; + VP8LHistogram* histo = NULL; + + if (!CalculateBestCacheSize(argb, width, height, quality, hash_chain, + refs_lz77, &lz77_computed, cache_bits)) { goto Error; } - for (cache_bits = 0; cache_bits <= MAX_COLOR_CACHE_BITS; ++cache_bits) { - double cur_entropy; - VP8LHistogram histo; - VP8LHistogramInit(&histo, cache_bits); - ComputeCacheHistogram(argb, xsize, ysize, &refs, cache_bits, &histo); - cur_entropy = VP8LHistogramEstimateBits(&histo) + - kSmallPenaltyForLargeCache * cache_bits; - if (cache_bits == 0 || cur_entropy < lowest_entropy) { - *best_cache_bits = cache_bits; - lowest_entropy = cur_entropy; + + if (lz77_computed) { + // Transform refs_lz77 for the optimized cache_bits. + if (*cache_bits > 0) { + if (!BackwardRefsWithLocalCache(argb, *cache_bits, refs_lz77)) { + goto Error; + } + } + } else { + if (!BackwardReferencesLz77(width, height, argb, *cache_bits, quality, + 0 /* Low effort. */, hash_chain, refs_lz77)) { + goto Error; } } - ok = 1; + + if (!BackwardReferencesRle(width, height, argb, *cache_bits, refs_rle)) { + goto Error; + } + + histo = VP8LAllocateHistogram(*cache_bits); + if (histo == NULL) goto Error; + + { + // Evaluate LZ77 coding. + VP8LHistogramCreate(histo, refs_lz77, *cache_bits); + bit_cost_lz77 = VP8LHistogramEstimateBits(histo); + // Evaluate RLE coding. + VP8LHistogramCreate(histo, refs_rle, *cache_bits); + bit_cost_rle = VP8LHistogramEstimateBits(histo); + // Decide if LZ77 is useful. + lz77_is_useful = (bit_cost_lz77 < bit_cost_rle); + } + + // Choose appropriate backward reference. + if (lz77_is_useful) { + // TraceBackwards is costly. Don't execute it at lower quality. + const int try_lz77_trace_backwards = (quality >= 25); + best = refs_lz77; // default guess: lz77 is better + if (try_lz77_trace_backwards) { + VP8LBackwardRefs* const refs_trace = refs_rle; + if (!VP8LBackwardRefsCopy(refs_lz77, refs_trace)) { + best = NULL; + goto Error; + } + if (BackwardReferencesTraceBackwards(width, height, argb, quality, + *cache_bits, hash_chain, + refs_trace)) { + double bit_cost_trace; + // Evaluate LZ77 coding. + VP8LHistogramCreate(histo, refs_trace, *cache_bits); + bit_cost_trace = VP8LHistogramEstimateBits(histo); + if (bit_cost_trace < bit_cost_lz77) { + best = refs_trace; + } + } + } + } else { + best = refs_rle; + } + + BackwardReferences2DLocality(width, best); + Error: - VP8LClearBackwardRefs(&refs); - return ok; + VP8LFreeHistogram(histo); + return best; +} + +VP8LBackwardRefs* VP8LGetBackwardReferences( + int width, int height, const uint32_t* const argb, int quality, + int low_effort, int* const cache_bits, VP8LHashChain* const hash_chain, + VP8LBackwardRefs refs_array[2]) { + if (low_effort) { + return GetBackwardReferencesLowEffort(width, height, argb, quality, + cache_bits, hash_chain, refs_array); + } else { + return GetBackwardReferences(width, height, argb, quality, cache_bits, + hash_chain, refs_array); + } } diff --git a/drivers/webp/enc/backward_references.h b/drivers/webp/enc/backward_references.h index 8006a56ba1..daa084d846 100644 --- a/drivers/webp/enc/backward_references.h +++ b/drivers/webp/enc/backward_references.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Author: Jyrki Alakuijala (jyrki@google.com) @@ -13,82 +15,15 @@ #include <assert.h> #include <stdlib.h> -#include "../types.h" -#include "../format_constants.h" +#include "../webp/types.h" +#include "../webp/format_constants.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -// The spec allows 11, we use 9 bits to reduce memory consumption in encoding. -// Having 9 instead of 11 only removes about 0.25 % of compression density. -#define MAX_COLOR_CACHE_BITS 9 - -// Max ever number of codes we'll use: -#define PIX_OR_COPY_CODES_MAX \ - (NUM_LITERAL_CODES + NUM_LENGTH_CODES + (1 << MAX_COLOR_CACHE_BITS)) - -// ----------------------------------------------------------------------------- -// PrefixEncode() - -// use GNU builtins where available. -#if defined(__GNUC__) && \ - ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4) -static WEBP_INLINE int BitsLog2Floor(uint32_t n) { - return n == 0 ? -1 : 31 ^ __builtin_clz(n); -} -#elif defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86)) -#include <intrin.h> -#pragma intrinsic(_BitScanReverse) - -static WEBP_INLINE int BitsLog2Floor(uint32_t n) { - unsigned long first_set_bit; - return _BitScanReverse(&first_set_bit, n) ? first_set_bit : -1; -} -#else -static WEBP_INLINE int BitsLog2Floor(uint32_t n) { - int log = 0; - uint32_t value = n; - int i; - - if (value == 0) return -1; - for (i = 4; i >= 0; --i) { - const int shift = (1 << i); - const uint32_t x = value >> shift; - if (x != 0) { - value = x; - log += shift; - } - } - return log; -} -#endif - -static WEBP_INLINE int VP8LBitsLog2Ceiling(uint32_t n) { - const int floor = BitsLog2Floor(n); - if (n == (n & ~(n - 1))) // zero or a power of two. - return floor; - else - return floor + 1; -} - -// Splitting of distance and length codes into prefixes and -// extra bits. The prefixes are encoded with an entropy code -// while the extra bits are stored just as normal bits. -static WEBP_INLINE void PrefixEncode(int distance, int* const code, - int* const extra_bits_count, - int* const extra_bits_value) { - // Collect the two most significant bits where the highest bit is 1. - const int highest_bit = BitsLog2Floor(--distance); - // & 0x3f is to make behavior well defined when highest_bit - // does not exist or is the least significant bit. - const int second_highest_bit = - (distance >> ((highest_bit - 1) & 0x3f)) & 1; - *extra_bits_count = (highest_bit > 0) ? (highest_bit - 1) : 0; - *extra_bits_value = distance & ((1 << *extra_bits_count) - 1); - *code = (highest_bit > 0) ? (2 * highest_bit + second_highest_bit) - : (highest_bit == 0) ? 1 : 0; -} +// The maximum allowed limit is 11. +#define MAX_COLOR_CACHE_BITS 10 // ----------------------------------------------------------------------------- // PixOrCopy @@ -173,39 +108,94 @@ static WEBP_INLINE uint32_t PixOrCopyDistance(const PixOrCopy* const p) { } // ----------------------------------------------------------------------------- -// VP8LBackwardRefs +// VP8LHashChain + +#define HASH_BITS 18 +#define HASH_SIZE (1 << HASH_BITS) + +typedef struct VP8LHashChain VP8LHashChain; +struct VP8LHashChain { + // Stores the most recently added position with the given hash value. + int32_t hash_to_first_index_[HASH_SIZE]; + // chain_[pos] stores the previous position with the same hash value + // for every pixel in the image. + int32_t* chain_; + // This is the maximum size of the hash_chain that can be constructed. + // Typically this is the pixel count (width x height) for a given image. + int size_; +}; -typedef struct { - PixOrCopy* refs; - int size; // currently used - int max_size; // maximum capacity -} VP8LBackwardRefs; +// Must be called first, to set size. +int VP8LHashChainInit(VP8LHashChain* const p, int size); +void VP8LHashChainClear(VP8LHashChain* const p); // release memory -// Initialize the object. Must be called first. 'refs' can be NULL. -void VP8LInitBackwardRefs(VP8LBackwardRefs* const refs); +// ----------------------------------------------------------------------------- +// VP8LBackwardRefs (block-based backward-references storage) + +// maximum number of reference blocks the image will be segmented into +#define MAX_REFS_BLOCK_PER_IMAGE 16 + +typedef struct PixOrCopyBlock PixOrCopyBlock; // forward declaration +typedef struct VP8LBackwardRefs VP8LBackwardRefs; + +// Container for blocks chain +struct VP8LBackwardRefs { + int block_size_; // common block-size + int error_; // set to true if some memory error occurred + PixOrCopyBlock* refs_; // list of currently used blocks + PixOrCopyBlock** tail_; // for list recycling + PixOrCopyBlock* free_blocks_; // free-list + PixOrCopyBlock* last_block_; // used for adding new refs (internal) +}; -// Release memory and re-initialize the object. 'refs' can be NULL. -void VP8LClearBackwardRefs(VP8LBackwardRefs* const refs); +// Initialize the object. 'block_size' is the common block size to store +// references (typically, width * height / MAX_REFS_BLOCK_PER_IMAGE). +void VP8LBackwardRefsInit(VP8LBackwardRefs* const refs, int block_size); +// Release memory for backward references. +void VP8LBackwardRefsClear(VP8LBackwardRefs* const refs); +// Copies the 'src' backward refs to the 'dst'. Returns 0 in case of error. +int VP8LBackwardRefsCopy(const VP8LBackwardRefs* const src, + VP8LBackwardRefs* const dst); -// Allocate 'max_size' references. Returns false in case of memory error. -int VP8LBackwardRefsAlloc(VP8LBackwardRefs* const refs, int max_size); +// Cursor for iterating on references content +typedef struct { + // public: + PixOrCopy* cur_pos; // current position + // private: + PixOrCopyBlock* cur_block_; // current block in the refs list + const PixOrCopy* last_pos_; // sentinel for switching to next block +} VP8LRefsCursor; + +// Returns a cursor positioned at the beginning of the references list. +VP8LRefsCursor VP8LRefsCursorInit(const VP8LBackwardRefs* const refs); +// Returns true if cursor is pointing at a valid position. +static WEBP_INLINE int VP8LRefsCursorOk(const VP8LRefsCursor* const c) { + return (c->cur_pos != NULL); +} +// Move to next block of references. Internal, not to be called directly. +void VP8LRefsCursorNextBlock(VP8LRefsCursor* const c); +// Move to next position, or NULL. Should not be called if !VP8LRefsCursorOk(). +static WEBP_INLINE void VP8LRefsCursorNext(VP8LRefsCursor* const c) { + assert(c != NULL); + assert(VP8LRefsCursorOk(c)); + if (++c->cur_pos == c->last_pos_) VP8LRefsCursorNextBlock(c); +} // ----------------------------------------------------------------------------- // Main entry points // Evaluates best possible backward references for specified quality. -// Further optimize for 2D locality if use_2d_locality flag is set. -int VP8LGetBackwardReferences(int width, int height, - const uint32_t* const argb, - int quality, int cache_bits, int use_2d_locality, - VP8LBackwardRefs* const best); - -// Produce an estimate for a good color cache size for the image. -int VP8LCalculateEstimateForCacheSize(const uint32_t* const argb, - int xsize, int ysize, - int* const best_cache_bits); - -#if defined(__cplusplus) || defined(c_plusplus) +// The input cache_bits to 'VP8LGetBackwardReferences' sets the maximum cache +// bits to use (passing 0 implies disabling the local color cache). +// The optimal cache bits is evaluated and set for the *cache_bits parameter. +// The return value is the pointer to the best of the two backward refs viz, +// refs[0] or refs[1]. +VP8LBackwardRefs* VP8LGetBackwardReferences( + int width, int height, const uint32_t* const argb, int quality, + int low_effort, int* const cache_bits, VP8LHashChain* const hash_chain, + VP8LBackwardRefs refs[2]); + +#ifdef __cplusplus } #endif diff --git a/drivers/webp/enc/config.c b/drivers/webp/enc/config.c index 4136f6c227..f9f7961d58 100644 --- a/drivers/webp/enc/config.c +++ b/drivers/webp/enc/config.c @@ -1,19 +1,17 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Coding tools configuration // // Author: Skal (pascal.massimino@gmail.com) -#include "../encode.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "../webp/encode.h" //------------------------------------------------------------------------------ // WebPConfig @@ -31,9 +29,9 @@ int WebPConfigInitInternal(WebPConfig* config, config->target_PSNR = 0.; config->method = 4; config->sns_strength = 50; - config->filter_strength = 20; // default: light filtering + config->filter_strength = 60; // mid-filtering config->filter_sharpness = 0; - config->filter_type = 0; // default: simple + config->filter_type = 1; // default: strong (so U/V is filtered too) config->partitions = 0; config->segments = 4; config->pass = 1; @@ -45,7 +43,15 @@ int WebPConfigInitInternal(WebPConfig* config, config->alpha_filtering = 1; config->alpha_quality = 100; config->lossless = 0; + config->exact = 0; config->image_hint = WEBP_HINT_DEFAULT; + config->emulate_jpeg_size = 0; + config->thread_level = 0; + config->low_memory = 0; + config->near_lossless = 100; +#ifdef WEBP_EXPERIMENTAL_FEATURES + config->delta_palettization = 0; +#endif // WEBP_EXPERIMENTAL_FEATURES // TODO(skal): tune. switch (preset) { @@ -53,11 +59,13 @@ int WebPConfigInitInternal(WebPConfig* config, config->sns_strength = 80; config->filter_sharpness = 4; config->filter_strength = 35; + config->preprocessing &= ~2; // no dithering break; case WEBP_PRESET_PHOTO: config->sns_strength = 80; config->filter_sharpness = 3; config->filter_strength = 30; + config->preprocessing |= 2; break; case WEBP_PRESET_DRAWING: config->sns_strength = 25; @@ -67,10 +75,12 @@ int WebPConfigInitInternal(WebPConfig* config, case WEBP_PRESET_ICON: config->sns_strength = 0; config->filter_strength = 0; // disable filtering to retain sharpness + config->preprocessing &= ~2; // no dithering break; case WEBP_PRESET_TEXT: config->sns_strength = 0; config->filter_strength = 0; // disable filtering to retain sharpness + config->preprocessing &= ~2; // no dithering config->segments = 2; break; case WEBP_PRESET_DEFAULT: @@ -106,7 +116,7 @@ int WebPValidateConfig(const WebPConfig* config) { return 0; if (config->show_compressed < 0 || config->show_compressed > 1) return 0; - if (config->preprocessing < 0 || config->preprocessing > 1) + if (config->preprocessing < 0 || config->preprocessing > 7) return 0; if (config->partitions < 0 || config->partitions > 3) return 0; @@ -120,13 +130,44 @@ int WebPValidateConfig(const WebPConfig* config) { return 0; if (config->lossless < 0 || config->lossless > 1) return 0; + if (config->near_lossless < 0 || config->near_lossless > 100) + return 0; if (config->image_hint >= WEBP_HINT_LAST) return 0; + if (config->emulate_jpeg_size < 0 || config->emulate_jpeg_size > 1) + return 0; + if (config->thread_level < 0 || config->thread_level > 1) + return 0; + if (config->low_memory < 0 || config->low_memory > 1) + return 0; + if (config->exact < 0 || config->exact > 1) + return 0; +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (config->delta_palettization < 0 || config->delta_palettization > 1) + return 0; +#endif // WEBP_EXPERIMENTAL_FEATURES return 1; } //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif +#define MAX_LEVEL 9 + +// Mapping between -z level and -m / -q parameter settings. +static const struct { + uint8_t method_; + uint8_t quality_; +} kLosslessPresets[MAX_LEVEL + 1] = { + { 0, 0 }, { 1, 20 }, { 2, 25 }, { 3, 30 }, { 3, 50 }, + { 4, 50 }, { 4, 75 }, { 4, 90 }, { 5, 90 }, { 6, 100 } +}; + +int WebPConfigLosslessPreset(WebPConfig* config, int level) { + if (config == NULL || level < 0 || level > MAX_LEVEL) return 0; + config->lossless = 1; + config->method = kLosslessPresets[level].method_; + config->quality = kLosslessPresets[level].quality_; + return 1; +} + +//------------------------------------------------------------------------------ diff --git a/drivers/webp/enc/cost.c b/drivers/webp/enc/cost.c index 92e0cc713c..ae7fe01388 100644 --- a/drivers/webp/enc/cost.c +++ b/drivers/webp/enc/cost.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Cost tables for level and modes @@ -11,42 +13,6 @@ #include "./cost.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -//------------------------------------------------------------------------------ -// Boolean-cost cost table - -const uint16_t VP8EntropyCost[256] = { - 1792, 1792, 1792, 1536, 1536, 1408, 1366, 1280, 1280, 1216, - 1178, 1152, 1110, 1076, 1061, 1024, 1024, 992, 968, 951, - 939, 911, 896, 878, 871, 854, 838, 820, 811, 794, - 786, 768, 768, 752, 740, 732, 720, 709, 704, 690, - 683, 672, 666, 655, 647, 640, 631, 622, 615, 607, - 598, 592, 586, 576, 572, 564, 559, 555, 547, 541, - 534, 528, 522, 512, 512, 504, 500, 494, 488, 483, - 477, 473, 467, 461, 458, 452, 448, 443, 438, 434, - 427, 424, 419, 415, 410, 406, 403, 399, 394, 390, - 384, 384, 377, 374, 370, 366, 362, 359, 355, 351, - 347, 342, 342, 336, 333, 330, 326, 323, 320, 316, - 312, 308, 305, 302, 299, 296, 293, 288, 287, 283, - 280, 277, 274, 272, 268, 266, 262, 256, 256, 256, - 251, 248, 245, 242, 240, 237, 234, 232, 228, 226, - 223, 221, 218, 216, 214, 211, 208, 205, 203, 201, - 198, 196, 192, 191, 188, 187, 183, 181, 179, 176, - 175, 171, 171, 168, 165, 163, 160, 159, 156, 154, - 152, 150, 148, 146, 144, 142, 139, 138, 135, 133, - 131, 128, 128, 125, 123, 121, 119, 117, 115, 113, - 111, 110, 107, 105, 103, 102, 100, 98, 96, 94, - 92, 91, 89, 86, 86, 83, 82, 80, 77, 76, - 74, 73, 71, 69, 67, 66, 64, 63, 61, 59, - 57, 55, 54, 52, 51, 49, 47, 46, 44, 43, - 41, 40, 38, 36, 35, 33, 32, 30, 29, 27, - 25, 24, 22, 21, 19, 18, 16, 15, 13, 12, - 10, 9, 7, 6, 4, 3 -}; - //------------------------------------------------------------------------------ // Level cost tables @@ -73,267 +39,6 @@ const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2] = { {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x153} }; -// fixed costs for coding levels, deduce from the coding tree. -// This is only the part that doesn't depend on the probability state. -const uint16_t VP8LevelFixedCosts[2048] = { - 0, 256, 256, 256, 256, 432, 618, 630, - 731, 640, 640, 828, 901, 948, 1021, 1101, - 1174, 1221, 1294, 1042, 1085, 1115, 1158, 1202, - 1245, 1275, 1318, 1337, 1380, 1410, 1453, 1497, - 1540, 1570, 1613, 1280, 1295, 1317, 1332, 1358, - 1373, 1395, 1410, 1454, 1469, 1491, 1506, 1532, - 1547, 1569, 1584, 1601, 1616, 1638, 1653, 1679, - 1694, 1716, 1731, 1775, 1790, 1812, 1827, 1853, - 1868, 1890, 1905, 1727, 1733, 1742, 1748, 1759, - 1765, 1774, 1780, 1800, 1806, 1815, 1821, 1832, - 1838, 1847, 1853, 1878, 1884, 1893, 1899, 1910, - 1916, 1925, 1931, 1951, 1957, 1966, 1972, 1983, - 1989, 1998, 2004, 2027, 2033, 2042, 2048, 2059, - 2065, 2074, 2080, 2100, 2106, 2115, 2121, 2132, - 2138, 2147, 2153, 2178, 2184, 2193, 2199, 2210, - 2216, 2225, 2231, 2251, 2257, 2266, 2272, 2283, - 2289, 2298, 2304, 2168, 2174, 2183, 2189, 2200, - 2206, 2215, 2221, 2241, 2247, 2256, 2262, 2273, - 2279, 2288, 2294, 2319, 2325, 2334, 2340, 2351, - 2357, 2366, 2372, 2392, 2398, 2407, 2413, 2424, - 2430, 2439, 2445, 2468, 2474, 2483, 2489, 2500, - 2506, 2515, 2521, 2541, 2547, 2556, 2562, 2573, - 2579, 2588, 2594, 2619, 2625, 2634, 2640, 2651, - 2657, 2666, 2672, 2692, 2698, 2707, 2713, 2724, - 2730, 2739, 2745, 2540, 2546, 2555, 2561, 2572, - 2578, 2587, 2593, 2613, 2619, 2628, 2634, 2645, - 2651, 2660, 2666, 2691, 2697, 2706, 2712, 2723, - 2729, 2738, 2744, 2764, 2770, 2779, 2785, 2796, - 2802, 2811, 2817, 2840, 2846, 2855, 2861, 2872, - 2878, 2887, 2893, 2913, 2919, 2928, 2934, 2945, - 2951, 2960, 2966, 2991, 2997, 3006, 3012, 3023, - 3029, 3038, 3044, 3064, 3070, 3079, 3085, 3096, - 3102, 3111, 3117, 2981, 2987, 2996, 3002, 3013, - 3019, 3028, 3034, 3054, 3060, 3069, 3075, 3086, - 3092, 3101, 3107, 3132, 3138, 3147, 3153, 3164, - 3170, 3179, 3185, 3205, 3211, 3220, 3226, 3237, - 3243, 3252, 3258, 3281, 3287, 3296, 3302, 3313, - 3319, 3328, 3334, 3354, 3360, 3369, 3375, 3386, - 3392, 3401, 3407, 3432, 3438, 3447, 3453, 3464, - 3470, 3479, 3485, 3505, 3511, 3520, 3526, 3537, - 3543, 3552, 3558, 2816, 2822, 2831, 2837, 2848, - 2854, 2863, 2869, 2889, 2895, 2904, 2910, 2921, - 2927, 2936, 2942, 2967, 2973, 2982, 2988, 2999, - 3005, 3014, 3020, 3040, 3046, 3055, 3061, 3072, - 3078, 3087, 3093, 3116, 3122, 3131, 3137, 3148, - 3154, 3163, 3169, 3189, 3195, 3204, 3210, 3221, - 3227, 3236, 3242, 3267, 3273, 3282, 3288, 3299, - 3305, 3314, 3320, 3340, 3346, 3355, 3361, 3372, - 3378, 3387, 3393, 3257, 3263, 3272, 3278, 3289, - 3295, 3304, 3310, 3330, 3336, 3345, 3351, 3362, - 3368, 3377, 3383, 3408, 3414, 3423, 3429, 3440, - 3446, 3455, 3461, 3481, 3487, 3496, 3502, 3513, - 3519, 3528, 3534, 3557, 3563, 3572, 3578, 3589, - 3595, 3604, 3610, 3630, 3636, 3645, 3651, 3662, - 3668, 3677, 3683, 3708, 3714, 3723, 3729, 3740, - 3746, 3755, 3761, 3781, 3787, 3796, 3802, 3813, - 3819, 3828, 3834, 3629, 3635, 3644, 3650, 3661, - 3667, 3676, 3682, 3702, 3708, 3717, 3723, 3734, - 3740, 3749, 3755, 3780, 3786, 3795, 3801, 3812, - 3818, 3827, 3833, 3853, 3859, 3868, 3874, 3885, - 3891, 3900, 3906, 3929, 3935, 3944, 3950, 3961, - 3967, 3976, 3982, 4002, 4008, 4017, 4023, 4034, - 4040, 4049, 4055, 4080, 4086, 4095, 4101, 4112, - 4118, 4127, 4133, 4153, 4159, 4168, 4174, 4185, - 4191, 4200, 4206, 4070, 4076, 4085, 4091, 4102, - 4108, 4117, 4123, 4143, 4149, 4158, 4164, 4175, - 4181, 4190, 4196, 4221, 4227, 4236, 4242, 4253, - 4259, 4268, 4274, 4294, 4300, 4309, 4315, 4326, - 4332, 4341, 4347, 4370, 4376, 4385, 4391, 4402, - 4408, 4417, 4423, 4443, 4449, 4458, 4464, 4475, - 4481, 4490, 4496, 4521, 4527, 4536, 4542, 4553, - 4559, 4568, 4574, 4594, 4600, 4609, 4615, 4626, - 4632, 4641, 4647, 3515, 3521, 3530, 3536, 3547, - 3553, 3562, 3568, 3588, 3594, 3603, 3609, 3620, - 3626, 3635, 3641, 3666, 3672, 3681, 3687, 3698, - 3704, 3713, 3719, 3739, 3745, 3754, 3760, 3771, - 3777, 3786, 3792, 3815, 3821, 3830, 3836, 3847, - 3853, 3862, 3868, 3888, 3894, 3903, 3909, 3920, - 3926, 3935, 3941, 3966, 3972, 3981, 3987, 3998, - 4004, 4013, 4019, 4039, 4045, 4054, 4060, 4071, - 4077, 4086, 4092, 3956, 3962, 3971, 3977, 3988, - 3994, 4003, 4009, 4029, 4035, 4044, 4050, 4061, - 4067, 4076, 4082, 4107, 4113, 4122, 4128, 4139, - 4145, 4154, 4160, 4180, 4186, 4195, 4201, 4212, - 4218, 4227, 4233, 4256, 4262, 4271, 4277, 4288, - 4294, 4303, 4309, 4329, 4335, 4344, 4350, 4361, - 4367, 4376, 4382, 4407, 4413, 4422, 4428, 4439, - 4445, 4454, 4460, 4480, 4486, 4495, 4501, 4512, - 4518, 4527, 4533, 4328, 4334, 4343, 4349, 4360, - 4366, 4375, 4381, 4401, 4407, 4416, 4422, 4433, - 4439, 4448, 4454, 4479, 4485, 4494, 4500, 4511, - 4517, 4526, 4532, 4552, 4558, 4567, 4573, 4584, - 4590, 4599, 4605, 4628, 4634, 4643, 4649, 4660, - 4666, 4675, 4681, 4701, 4707, 4716, 4722, 4733, - 4739, 4748, 4754, 4779, 4785, 4794, 4800, 4811, - 4817, 4826, 4832, 4852, 4858, 4867, 4873, 4884, - 4890, 4899, 4905, 4769, 4775, 4784, 4790, 4801, - 4807, 4816, 4822, 4842, 4848, 4857, 4863, 4874, - 4880, 4889, 4895, 4920, 4926, 4935, 4941, 4952, - 4958, 4967, 4973, 4993, 4999, 5008, 5014, 5025, - 5031, 5040, 5046, 5069, 5075, 5084, 5090, 5101, - 5107, 5116, 5122, 5142, 5148, 5157, 5163, 5174, - 5180, 5189, 5195, 5220, 5226, 5235, 5241, 5252, - 5258, 5267, 5273, 5293, 5299, 5308, 5314, 5325, - 5331, 5340, 5346, 4604, 4610, 4619, 4625, 4636, - 4642, 4651, 4657, 4677, 4683, 4692, 4698, 4709, - 4715, 4724, 4730, 4755, 4761, 4770, 4776, 4787, - 4793, 4802, 4808, 4828, 4834, 4843, 4849, 4860, - 4866, 4875, 4881, 4904, 4910, 4919, 4925, 4936, - 4942, 4951, 4957, 4977, 4983, 4992, 4998, 5009, - 5015, 5024, 5030, 5055, 5061, 5070, 5076, 5087, - 5093, 5102, 5108, 5128, 5134, 5143, 5149, 5160, - 5166, 5175, 5181, 5045, 5051, 5060, 5066, 5077, - 5083, 5092, 5098, 5118, 5124, 5133, 5139, 5150, - 5156, 5165, 5171, 5196, 5202, 5211, 5217, 5228, - 5234, 5243, 5249, 5269, 5275, 5284, 5290, 5301, - 5307, 5316, 5322, 5345, 5351, 5360, 5366, 5377, - 5383, 5392, 5398, 5418, 5424, 5433, 5439, 5450, - 5456, 5465, 5471, 5496, 5502, 5511, 5517, 5528, - 5534, 5543, 5549, 5569, 5575, 5584, 5590, 5601, - 5607, 5616, 5622, 5417, 5423, 5432, 5438, 5449, - 5455, 5464, 5470, 5490, 5496, 5505, 5511, 5522, - 5528, 5537, 5543, 5568, 5574, 5583, 5589, 5600, - 5606, 5615, 5621, 5641, 5647, 5656, 5662, 5673, - 5679, 5688, 5694, 5717, 5723, 5732, 5738, 5749, - 5755, 5764, 5770, 5790, 5796, 5805, 5811, 5822, - 5828, 5837, 5843, 5868, 5874, 5883, 5889, 5900, - 5906, 5915, 5921, 5941, 5947, 5956, 5962, 5973, - 5979, 5988, 5994, 5858, 5864, 5873, 5879, 5890, - 5896, 5905, 5911, 5931, 5937, 5946, 5952, 5963, - 5969, 5978, 5984, 6009, 6015, 6024, 6030, 6041, - 6047, 6056, 6062, 6082, 6088, 6097, 6103, 6114, - 6120, 6129, 6135, 6158, 6164, 6173, 6179, 6190, - 6196, 6205, 6211, 6231, 6237, 6246, 6252, 6263, - 6269, 6278, 6284, 6309, 6315, 6324, 6330, 6341, - 6347, 6356, 6362, 6382, 6388, 6397, 6403, 6414, - 6420, 6429, 6435, 3515, 3521, 3530, 3536, 3547, - 3553, 3562, 3568, 3588, 3594, 3603, 3609, 3620, - 3626, 3635, 3641, 3666, 3672, 3681, 3687, 3698, - 3704, 3713, 3719, 3739, 3745, 3754, 3760, 3771, - 3777, 3786, 3792, 3815, 3821, 3830, 3836, 3847, - 3853, 3862, 3868, 3888, 3894, 3903, 3909, 3920, - 3926, 3935, 3941, 3966, 3972, 3981, 3987, 3998, - 4004, 4013, 4019, 4039, 4045, 4054, 4060, 4071, - 4077, 4086, 4092, 3956, 3962, 3971, 3977, 3988, - 3994, 4003, 4009, 4029, 4035, 4044, 4050, 4061, - 4067, 4076, 4082, 4107, 4113, 4122, 4128, 4139, - 4145, 4154, 4160, 4180, 4186, 4195, 4201, 4212, - 4218, 4227, 4233, 4256, 4262, 4271, 4277, 4288, - 4294, 4303, 4309, 4329, 4335, 4344, 4350, 4361, - 4367, 4376, 4382, 4407, 4413, 4422, 4428, 4439, - 4445, 4454, 4460, 4480, 4486, 4495, 4501, 4512, - 4518, 4527, 4533, 4328, 4334, 4343, 4349, 4360, - 4366, 4375, 4381, 4401, 4407, 4416, 4422, 4433, - 4439, 4448, 4454, 4479, 4485, 4494, 4500, 4511, - 4517, 4526, 4532, 4552, 4558, 4567, 4573, 4584, - 4590, 4599, 4605, 4628, 4634, 4643, 4649, 4660, - 4666, 4675, 4681, 4701, 4707, 4716, 4722, 4733, - 4739, 4748, 4754, 4779, 4785, 4794, 4800, 4811, - 4817, 4826, 4832, 4852, 4858, 4867, 4873, 4884, - 4890, 4899, 4905, 4769, 4775, 4784, 4790, 4801, - 4807, 4816, 4822, 4842, 4848, 4857, 4863, 4874, - 4880, 4889, 4895, 4920, 4926, 4935, 4941, 4952, - 4958, 4967, 4973, 4993, 4999, 5008, 5014, 5025, - 5031, 5040, 5046, 5069, 5075, 5084, 5090, 5101, - 5107, 5116, 5122, 5142, 5148, 5157, 5163, 5174, - 5180, 5189, 5195, 5220, 5226, 5235, 5241, 5252, - 5258, 5267, 5273, 5293, 5299, 5308, 5314, 5325, - 5331, 5340, 5346, 4604, 4610, 4619, 4625, 4636, - 4642, 4651, 4657, 4677, 4683, 4692, 4698, 4709, - 4715, 4724, 4730, 4755, 4761, 4770, 4776, 4787, - 4793, 4802, 4808, 4828, 4834, 4843, 4849, 4860, - 4866, 4875, 4881, 4904, 4910, 4919, 4925, 4936, - 4942, 4951, 4957, 4977, 4983, 4992, 4998, 5009, - 5015, 5024, 5030, 5055, 5061, 5070, 5076, 5087, - 5093, 5102, 5108, 5128, 5134, 5143, 5149, 5160, - 5166, 5175, 5181, 5045, 5051, 5060, 5066, 5077, - 5083, 5092, 5098, 5118, 5124, 5133, 5139, 5150, - 5156, 5165, 5171, 5196, 5202, 5211, 5217, 5228, - 5234, 5243, 5249, 5269, 5275, 5284, 5290, 5301, - 5307, 5316, 5322, 5345, 5351, 5360, 5366, 5377, - 5383, 5392, 5398, 5418, 5424, 5433, 5439, 5450, - 5456, 5465, 5471, 5496, 5502, 5511, 5517, 5528, - 5534, 5543, 5549, 5569, 5575, 5584, 5590, 5601, - 5607, 5616, 5622, 5417, 5423, 5432, 5438, 5449, - 5455, 5464, 5470, 5490, 5496, 5505, 5511, 5522, - 5528, 5537, 5543, 5568, 5574, 5583, 5589, 5600, - 5606, 5615, 5621, 5641, 5647, 5656, 5662, 5673, - 5679, 5688, 5694, 5717, 5723, 5732, 5738, 5749, - 5755, 5764, 5770, 5790, 5796, 5805, 5811, 5822, - 5828, 5837, 5843, 5868, 5874, 5883, 5889, 5900, - 5906, 5915, 5921, 5941, 5947, 5956, 5962, 5973, - 5979, 5988, 5994, 5858, 5864, 5873, 5879, 5890, - 5896, 5905, 5911, 5931, 5937, 5946, 5952, 5963, - 5969, 5978, 5984, 6009, 6015, 6024, 6030, 6041, - 6047, 6056, 6062, 6082, 6088, 6097, 6103, 6114, - 6120, 6129, 6135, 6158, 6164, 6173, 6179, 6190, - 6196, 6205, 6211, 6231, 6237, 6246, 6252, 6263, - 6269, 6278, 6284, 6309, 6315, 6324, 6330, 6341, - 6347, 6356, 6362, 6382, 6388, 6397, 6403, 6414, - 6420, 6429, 6435, 5303, 5309, 5318, 5324, 5335, - 5341, 5350, 5356, 5376, 5382, 5391, 5397, 5408, - 5414, 5423, 5429, 5454, 5460, 5469, 5475, 5486, - 5492, 5501, 5507, 5527, 5533, 5542, 5548, 5559, - 5565, 5574, 5580, 5603, 5609, 5618, 5624, 5635, - 5641, 5650, 5656, 5676, 5682, 5691, 5697, 5708, - 5714, 5723, 5729, 5754, 5760, 5769, 5775, 5786, - 5792, 5801, 5807, 5827, 5833, 5842, 5848, 5859, - 5865, 5874, 5880, 5744, 5750, 5759, 5765, 5776, - 5782, 5791, 5797, 5817, 5823, 5832, 5838, 5849, - 5855, 5864, 5870, 5895, 5901, 5910, 5916, 5927, - 5933, 5942, 5948, 5968, 5974, 5983, 5989, 6000, - 6006, 6015, 6021, 6044, 6050, 6059, 6065, 6076, - 6082, 6091, 6097, 6117, 6123, 6132, 6138, 6149, - 6155, 6164, 6170, 6195, 6201, 6210, 6216, 6227, - 6233, 6242, 6248, 6268, 6274, 6283, 6289, 6300, - 6306, 6315, 6321, 6116, 6122, 6131, 6137, 6148, - 6154, 6163, 6169, 6189, 6195, 6204, 6210, 6221, - 6227, 6236, 6242, 6267, 6273, 6282, 6288, 6299, - 6305, 6314, 6320, 6340, 6346, 6355, 6361, 6372, - 6378, 6387, 6393, 6416, 6422, 6431, 6437, 6448, - 6454, 6463, 6469, 6489, 6495, 6504, 6510, 6521, - 6527, 6536, 6542, 6567, 6573, 6582, 6588, 6599, - 6605, 6614, 6620, 6640, 6646, 6655, 6661, 6672, - 6678, 6687, 6693, 6557, 6563, 6572, 6578, 6589, - 6595, 6604, 6610, 6630, 6636, 6645, 6651, 6662, - 6668, 6677, 6683, 6708, 6714, 6723, 6729, 6740, - 6746, 6755, 6761, 6781, 6787, 6796, 6802, 6813, - 6819, 6828, 6834, 6857, 6863, 6872, 6878, 6889, - 6895, 6904, 6910, 6930, 6936, 6945, 6951, 6962, - 6968, 6977, 6983, 7008, 7014, 7023, 7029, 7040, - 7046, 7055, 7061, 7081, 7087, 7096, 7102, 7113, - 7119, 7128, 7134, 6392, 6398, 6407, 6413, 6424, - 6430, 6439, 6445, 6465, 6471, 6480, 6486, 6497, - 6503, 6512, 6518, 6543, 6549, 6558, 6564, 6575, - 6581, 6590, 6596, 6616, 6622, 6631, 6637, 6648, - 6654, 6663, 6669, 6692, 6698, 6707, 6713, 6724, - 6730, 6739, 6745, 6765, 6771, 6780, 6786, 6797, - 6803, 6812, 6818, 6843, 6849, 6858, 6864, 6875, - 6881, 6890, 6896, 6916, 6922, 6931, 6937, 6948, - 6954, 6963, 6969, 6833, 6839, 6848, 6854, 6865, - 6871, 6880, 6886, 6906, 6912, 6921, 6927, 6938, - 6944, 6953, 6959, 6984, 6990, 6999, 7005, 7016, - 7022, 7031, 7037, 7057, 7063, 7072, 7078, 7089, - 7095, 7104, 7110, 7133, 7139, 7148, 7154, 7165, - 7171, 7180, 7186, 7206, 7212, 7221, 7227, 7238, - 7244, 7253, 7259, 7284, 7290, 7299, 7305, 7316, - 7322, 7331, 7337, 7357, 7363, 7372, 7378, 7389, - 7395, 7404, 7410, 7205, 7211, 7220, 7226, 7237, - 7243, 7252, 7258, 7278, 7284, 7293, 7299, 7310, - 7316, 7325, 7331, 7356, 7362, 7371, 7377, 7388, - 7394, 7403, 7409, 7429, 7435, 7444, 7450, 7461, - 7467, 7476, 7482, 7505, 7511, 7520, 7526, 7537, - 7543, 7552, 7558, 7578, 7584, 7593, 7599, 7610, - 7616, 7625, 7631, 7656, 7662, 7671, 7677, 7688, - 7694, 7703, 7709, 7729, 7735, 7744, 7750, 7761 -}; - static int VariableLevelCost(int level, const uint8_t probas[NUM_PROBAS]) { int pattern = VP8LevelCodes[level - 1][0]; int bits = VP8LevelCodes[level - 1][1]; @@ -352,19 +57,21 @@ static int VariableLevelCost(int level, const uint8_t probas[NUM_PROBAS]) { //------------------------------------------------------------------------------ // Pre-calc level costs once for all -void VP8CalculateLevelCosts(VP8Proba* const proba) { +void VP8CalculateLevelCosts(VP8EncProba* const proba) { int ctype, band, ctx; if (!proba->dirty_) return; // nothing to do. for (ctype = 0; ctype < NUM_TYPES; ++ctype) { + int n; for (band = 0; band < NUM_BANDS; ++band) { - for(ctx = 0; ctx < NUM_CTX; ++ctx) { + for (ctx = 0; ctx < NUM_CTX; ++ctx) { const uint8_t* const p = proba->coeffs_[ctype][band][ctx]; uint16_t* const table = proba->level_cost_[ctype][band][ctx]; - const int cost_base = VP8BitCost(1, p[1]); + const int cost0 = (ctx > 0) ? VP8BitCost(1, p[0]) : 0; + const int cost_base = VP8BitCost(1, p[1]) + cost0; int v; - table[0] = VP8BitCost(0, p[1]); + table[0] = VP8BitCost(0, p[1]) + cost0; for (v = 1; v <= MAX_VARIABLE_LEVEL; ++v) { table[v] = cost_base + VariableLevelCost(v, p); } @@ -372,6 +79,12 @@ void VP8CalculateLevelCosts(VP8Proba* const proba) { // actually constant. } } + for (n = 0; n < 16; ++n) { // replicate bands. We don't need to sentinel. + for (ctx = 0; ctx < NUM_CTX; ++ctx) { + proba->remapped_costs_[ctype][n][ctx] = + proba->level_cost_[ctype][VP8EncBands[n]][ctx]; + } + } } proba->dirty_ = 0; } @@ -385,110 +98,257 @@ const uint16_t VP8FixedCostsUV[4] = { 302, 984, 439, 642 }; // note: these values include the fixed VP8BitCost(1, 145) mode selection cost. const uint16_t VP8FixedCostsI16[4] = { 663, 919, 872, 919 }; const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES] = { - { { 251, 1362, 1934, 2085, 2314, 2230, 1839, 1988, 2437, 2348 }, - { 403, 680, 1507, 1519, 2060, 2005, 1992, 1914, 1924, 1733 }, - { 353, 1121, 973, 1895, 2060, 1787, 1671, 1516, 2012, 1868 }, - { 770, 852, 1581, 632, 1393, 1780, 1823, 1936, 1074, 1218 }, - { 510, 1270, 1467, 1319, 847, 1279, 1792, 2094, 1080, 1353 }, - { 488, 1322, 918, 1573, 1300, 883, 1814, 1752, 1756, 1502 }, - { 425, 992, 1820, 1514, 1843, 2440, 937, 1771, 1924, 1129 }, - { 363, 1248, 1257, 1970, 2194, 2385, 1569, 953, 1951, 1601 }, - { 723, 1257, 1631, 964, 963, 1508, 1697, 1824, 671, 1418 }, - { 635, 1038, 1573, 930, 1673, 1413, 1410, 1687, 1410, 749 } }, - { { 451, 613, 1345, 1702, 1870, 1716, 1728, 1766, 2190, 2310 }, - { 678, 453, 1171, 1443, 1925, 1831, 2045, 1781, 1887, 1602 }, - { 711, 666, 674, 1718, 1910, 1493, 1775, 1193, 2325, 2325 }, - { 883, 854, 1583, 542, 1800, 1878, 1664, 2149, 1207, 1087 }, - { 669, 994, 1248, 1122, 949, 1179, 1376, 1729, 1070, 1244 }, - { 715, 1026, 715, 1350, 1430, 930, 1717, 1296, 1479, 1479 }, - { 544, 841, 1656, 1450, 2094, 3883, 1010, 1759, 2076, 809 }, - { 610, 855, 957, 1553, 2067, 1561, 1704, 824, 2066, 1226 }, - { 833, 960, 1416, 819, 1277, 1619, 1501, 1617, 757, 1182 }, - { 711, 964, 1252, 879, 1441, 1828, 1508, 1636, 1594, 734 } }, - { { 605, 764, 734, 1713, 1747, 1192, 1819, 1353, 1877, 2392 }, - { 866, 641, 586, 1622, 2072, 1431, 1888, 1346, 2189, 1764 }, - { 901, 851, 456, 2165, 2281, 1405, 1739, 1193, 2183, 2443 }, - { 770, 1045, 952, 1078, 1342, 1191, 1436, 1063, 1303, 995 }, - { 901, 1086, 727, 1170, 884, 1105, 1267, 1401, 1739, 1337 }, - { 951, 1162, 595, 1488, 1388, 703, 1790, 1366, 2057, 1724 }, - { 534, 986, 1273, 1987, 3273, 1485, 1024, 1399, 1583, 866 }, - { 699, 1182, 695, 1978, 1726, 1986, 1326, 714, 1750, 1672 }, - { 951, 1217, 1209, 920, 1062, 1441, 1548, 999, 952, 932 }, - { 733, 1284, 784, 1256, 1557, 1098, 1257, 1357, 1414, 908 } }, - { { 316, 1075, 1653, 1220, 2145, 2051, 1730, 2131, 1884, 1790 }, - { 745, 516, 1404, 894, 1599, 2375, 2013, 2105, 1475, 1381 }, - { 516, 729, 1088, 1319, 1637, 3426, 1636, 1275, 1531, 1453 }, - { 894, 943, 2138, 468, 1704, 2259, 2069, 1763, 1266, 1158 }, - { 605, 1025, 1235, 871, 1170, 1767, 1493, 1500, 1104, 1258 }, - { 739, 826, 1207, 1151, 1412, 846, 1305, 2726, 1014, 1569 }, - { 558, 825, 1820, 1398, 3344, 1556, 1218, 1550, 1228, 878 }, - { 429, 951, 1089, 1816, 3861, 3861, 1556, 969, 1568, 1828 }, - { 883, 961, 1752, 769, 1468, 1810, 2081, 2346, 613, 1298 }, - { 803, 895, 1372, 641, 1303, 1708, 1686, 1700, 1306, 1033 } }, - { { 439, 1267, 1270, 1579, 963, 1193, 1723, 1729, 1198, 1993 }, - { 705, 725, 1029, 1153, 1176, 1103, 1821, 1567, 1259, 1574 }, - { 723, 859, 802, 1253, 972, 1202, 1407, 1665, 1520, 1674 }, - { 894, 960, 1254, 887, 1052, 1607, 1344, 1349, 865, 1150 }, - { 833, 1312, 1337, 1205, 572, 1288, 1414, 1529, 1088, 1430 }, - { 842, 1279, 1068, 1861, 862, 688, 1861, 1630, 1039, 1381 }, - { 766, 938, 1279, 1546, 3338, 1550, 1031, 1542, 1288, 640 }, - { 715, 1090, 835, 1609, 1100, 1100, 1603, 1019, 1102, 1617 }, - { 894, 1813, 1500, 1188, 789, 1194, 1491, 1919, 617, 1333 }, - { 610, 1076, 1644, 1281, 1283, 975, 1179, 1688, 1434, 889 } }, - { { 544, 971, 1146, 1849, 1221, 740, 1857, 1621, 1683, 2430 }, - { 723, 705, 961, 1371, 1426, 821, 2081, 2079, 1839, 1380 }, - { 783, 857, 703, 2145, 1419, 814, 1791, 1310, 1609, 2206 }, - { 997, 1000, 1153, 792, 1229, 1162, 1810, 1418, 942, 979 }, - { 901, 1226, 883, 1289, 793, 715, 1904, 1649, 1319, 3108 }, - { 979, 1478, 782, 2216, 1454, 455, 3092, 1591, 1997, 1664 }, - { 663, 1110, 1504, 1114, 1522, 3311, 676, 1522, 1530, 1024 }, - { 605, 1138, 1153, 1314, 1569, 1315, 1157, 804, 1574, 1320 }, - { 770, 1216, 1218, 1227, 869, 1384, 1232, 1375, 834, 1239 }, - { 775, 1007, 843, 1216, 1225, 1074, 2527, 1479, 1149, 975 } }, - { { 477, 817, 1309, 1439, 1708, 1454, 1159, 1241, 1945, 1672 }, - { 577, 796, 1112, 1271, 1618, 1458, 1087, 1345, 1831, 1265 }, - { 663, 776, 753, 1940, 1690, 1690, 1227, 1097, 3149, 1361 }, - { 766, 1299, 1744, 1161, 1565, 1106, 1045, 1230, 1232, 707 }, - { 915, 1026, 1404, 1182, 1184, 851, 1428, 2425, 1043, 789 }, - { 883, 1456, 790, 1082, 1086, 985, 1083, 1484, 1238, 1160 }, - { 507, 1345, 2261, 1995, 1847, 3636, 653, 1761, 2287, 933 }, - { 553, 1193, 1470, 2057, 2059, 2059, 833, 779, 2058, 1263 }, - { 766, 1275, 1515, 1039, 957, 1554, 1286, 1540, 1289, 705 }, - { 499, 1378, 1496, 1385, 1850, 1850, 1044, 2465, 1515, 720 } }, - { { 553, 930, 978, 2077, 1968, 1481, 1457, 761, 1957, 2362 }, - { 694, 864, 905, 1720, 1670, 1621, 1429, 718, 2125, 1477 }, - { 699, 968, 658, 3190, 2024, 1479, 1865, 750, 2060, 2320 }, - { 733, 1308, 1296, 1062, 1576, 1322, 1062, 1112, 1172, 816 }, - { 920, 927, 1052, 939, 947, 1156, 1152, 1073, 3056, 1268 }, - { 723, 1534, 711, 1547, 1294, 892, 1553, 928, 1815, 1561 }, - { 663, 1366, 1583, 2111, 1712, 3501, 522, 1155, 2130, 1133 }, - { 614, 1731, 1188, 2343, 1944, 3733, 1287, 487, 3546, 1758 }, - { 770, 1585, 1312, 826, 884, 2673, 1185, 1006, 1195, 1195 }, - { 758, 1333, 1273, 1023, 1621, 1162, 1351, 833, 1479, 862 } }, - { { 376, 1193, 1446, 1149, 1545, 1577, 1870, 1789, 1175, 1823 }, - { 803, 633, 1136, 1058, 1350, 1323, 1598, 2247, 1072, 1252 }, - { 614, 1048, 943, 981, 1152, 1869, 1461, 1020, 1618, 1618 }, - { 1107, 1085, 1282, 592, 1779, 1933, 1648, 2403, 691, 1246 }, - { 851, 1309, 1223, 1243, 895, 1593, 1792, 2317, 627, 1076 }, - { 770, 1216, 1030, 1125, 921, 981, 1629, 1131, 1049, 1646 }, - { 626, 1469, 1456, 1081, 1489, 3278, 981, 1232, 1498, 733 }, - { 617, 1201, 812, 1220, 1476, 1476, 1478, 970, 1228, 1488 }, - { 1179, 1393, 1540, 999, 1243, 1503, 1916, 1925, 414, 1614 }, - { 943, 1088, 1490, 682, 1112, 1372, 1756, 1505, 966, 966 } }, - { { 322, 1142, 1589, 1396, 2144, 1859, 1359, 1925, 2084, 1518 }, - { 617, 625, 1241, 1234, 2121, 1615, 1524, 1858, 1720, 1004 }, - { 553, 851, 786, 1299, 1452, 1560, 1372, 1561, 1967, 1713 }, - { 770, 977, 1396, 568, 1893, 1639, 1540, 2108, 1430, 1013 }, - { 684, 1120, 1375, 982, 930, 2719, 1638, 1643, 933, 993 }, - { 553, 1103, 996, 1356, 1361, 1005, 1507, 1761, 1184, 1268 }, - { 419, 1247, 1537, 1554, 1817, 3606, 1026, 1666, 1829, 923 }, - { 439, 1139, 1101, 1257, 3710, 1922, 1205, 1040, 1931, 1529 }, - { 979, 935, 1269, 847, 1202, 1286, 1530, 1535, 827, 1036 }, - { 516, 1378, 1569, 1110, 1798, 1798, 1198, 2199, 1543, 712 } }, + { { 40, 1151, 1723, 1874, 2103, 2019, 1628, 1777, 2226, 2137 }, + { 192, 469, 1296, 1308, 1849, 1794, 1781, 1703, 1713, 1522 }, + { 142, 910, 762, 1684, 1849, 1576, 1460, 1305, 1801, 1657 }, + { 559, 641, 1370, 421, 1182, 1569, 1612, 1725, 863, 1007 }, + { 299, 1059, 1256, 1108, 636, 1068, 1581, 1883, 869, 1142 }, + { 277, 1111, 707, 1362, 1089, 672, 1603, 1541, 1545, 1291 }, + { 214, 781, 1609, 1303, 1632, 2229, 726, 1560, 1713, 918 }, + { 152, 1037, 1046, 1759, 1983, 2174, 1358, 742, 1740, 1390 }, + { 512, 1046, 1420, 753, 752, 1297, 1486, 1613, 460, 1207 }, + { 424, 827, 1362, 719, 1462, 1202, 1199, 1476, 1199, 538 } }, + { { 240, 402, 1134, 1491, 1659, 1505, 1517, 1555, 1979, 2099 }, + { 467, 242, 960, 1232, 1714, 1620, 1834, 1570, 1676, 1391 }, + { 500, 455, 463, 1507, 1699, 1282, 1564, 982, 2114, 2114 }, + { 672, 643, 1372, 331, 1589, 1667, 1453, 1938, 996, 876 }, + { 458, 783, 1037, 911, 738, 968, 1165, 1518, 859, 1033 }, + { 504, 815, 504, 1139, 1219, 719, 1506, 1085, 1268, 1268 }, + { 333, 630, 1445, 1239, 1883, 3672, 799, 1548, 1865, 598 }, + { 399, 644, 746, 1342, 1856, 1350, 1493, 613, 1855, 1015 }, + { 622, 749, 1205, 608, 1066, 1408, 1290, 1406, 546, 971 }, + { 500, 753, 1041, 668, 1230, 1617, 1297, 1425, 1383, 523 } }, + { { 394, 553, 523, 1502, 1536, 981, 1608, 1142, 1666, 2181 }, + { 655, 430, 375, 1411, 1861, 1220, 1677, 1135, 1978, 1553 }, + { 690, 640, 245, 1954, 2070, 1194, 1528, 982, 1972, 2232 }, + { 559, 834, 741, 867, 1131, 980, 1225, 852, 1092, 784 }, + { 690, 875, 516, 959, 673, 894, 1056, 1190, 1528, 1126 }, + { 740, 951, 384, 1277, 1177, 492, 1579, 1155, 1846, 1513 }, + { 323, 775, 1062, 1776, 3062, 1274, 813, 1188, 1372, 655 }, + { 488, 971, 484, 1767, 1515, 1775, 1115, 503, 1539, 1461 }, + { 740, 1006, 998, 709, 851, 1230, 1337, 788, 741, 721 }, + { 522, 1073, 573, 1045, 1346, 887, 1046, 1146, 1203, 697 } }, + { { 105, 864, 1442, 1009, 1934, 1840, 1519, 1920, 1673, 1579 }, + { 534, 305, 1193, 683, 1388, 2164, 1802, 1894, 1264, 1170 }, + { 305, 518, 877, 1108, 1426, 3215, 1425, 1064, 1320, 1242 }, + { 683, 732, 1927, 257, 1493, 2048, 1858, 1552, 1055, 947 }, + { 394, 814, 1024, 660, 959, 1556, 1282, 1289, 893, 1047 }, + { 528, 615, 996, 940, 1201, 635, 1094, 2515, 803, 1358 }, + { 347, 614, 1609, 1187, 3133, 1345, 1007, 1339, 1017, 667 }, + { 218, 740, 878, 1605, 3650, 3650, 1345, 758, 1357, 1617 }, + { 672, 750, 1541, 558, 1257, 1599, 1870, 2135, 402, 1087 }, + { 592, 684, 1161, 430, 1092, 1497, 1475, 1489, 1095, 822 } }, + { { 228, 1056, 1059, 1368, 752, 982, 1512, 1518, 987, 1782 }, + { 494, 514, 818, 942, 965, 892, 1610, 1356, 1048, 1363 }, + { 512, 648, 591, 1042, 761, 991, 1196, 1454, 1309, 1463 }, + { 683, 749, 1043, 676, 841, 1396, 1133, 1138, 654, 939 }, + { 622, 1101, 1126, 994, 361, 1077, 1203, 1318, 877, 1219 }, + { 631, 1068, 857, 1650, 651, 477, 1650, 1419, 828, 1170 }, + { 555, 727, 1068, 1335, 3127, 1339, 820, 1331, 1077, 429 }, + { 504, 879, 624, 1398, 889, 889, 1392, 808, 891, 1406 }, + { 683, 1602, 1289, 977, 578, 983, 1280, 1708, 406, 1122 }, + { 399, 865, 1433, 1070, 1072, 764, 968, 1477, 1223, 678 } }, + { { 333, 760, 935, 1638, 1010, 529, 1646, 1410, 1472, 2219 }, + { 512, 494, 750, 1160, 1215, 610, 1870, 1868, 1628, 1169 }, + { 572, 646, 492, 1934, 1208, 603, 1580, 1099, 1398, 1995 }, + { 786, 789, 942, 581, 1018, 951, 1599, 1207, 731, 768 }, + { 690, 1015, 672, 1078, 582, 504, 1693, 1438, 1108, 2897 }, + { 768, 1267, 571, 2005, 1243, 244, 2881, 1380, 1786, 1453 }, + { 452, 899, 1293, 903, 1311, 3100, 465, 1311, 1319, 813 }, + { 394, 927, 942, 1103, 1358, 1104, 946, 593, 1363, 1109 }, + { 559, 1005, 1007, 1016, 658, 1173, 1021, 1164, 623, 1028 }, + { 564, 796, 632, 1005, 1014, 863, 2316, 1268, 938, 764 } }, + { { 266, 606, 1098, 1228, 1497, 1243, 948, 1030, 1734, 1461 }, + { 366, 585, 901, 1060, 1407, 1247, 876, 1134, 1620, 1054 }, + { 452, 565, 542, 1729, 1479, 1479, 1016, 886, 2938, 1150 }, + { 555, 1088, 1533, 950, 1354, 895, 834, 1019, 1021, 496 }, + { 704, 815, 1193, 971, 973, 640, 1217, 2214, 832, 578 }, + { 672, 1245, 579, 871, 875, 774, 872, 1273, 1027, 949 }, + { 296, 1134, 2050, 1784, 1636, 3425, 442, 1550, 2076, 722 }, + { 342, 982, 1259, 1846, 1848, 1848, 622, 568, 1847, 1052 }, + { 555, 1064, 1304, 828, 746, 1343, 1075, 1329, 1078, 494 }, + { 288, 1167, 1285, 1174, 1639, 1639, 833, 2254, 1304, 509 } }, + { { 342, 719, 767, 1866, 1757, 1270, 1246, 550, 1746, 2151 }, + { 483, 653, 694, 1509, 1459, 1410, 1218, 507, 1914, 1266 }, + { 488, 757, 447, 2979, 1813, 1268, 1654, 539, 1849, 2109 }, + { 522, 1097, 1085, 851, 1365, 1111, 851, 901, 961, 605 }, + { 709, 716, 841, 728, 736, 945, 941, 862, 2845, 1057 }, + { 512, 1323, 500, 1336, 1083, 681, 1342, 717, 1604, 1350 }, + { 452, 1155, 1372, 1900, 1501, 3290, 311, 944, 1919, 922 }, + { 403, 1520, 977, 2132, 1733, 3522, 1076, 276, 3335, 1547 }, + { 559, 1374, 1101, 615, 673, 2462, 974, 795, 984, 984 }, + { 547, 1122, 1062, 812, 1410, 951, 1140, 622, 1268, 651 } }, + { { 165, 982, 1235, 938, 1334, 1366, 1659, 1578, 964, 1612 }, + { 592, 422, 925, 847, 1139, 1112, 1387, 2036, 861, 1041 }, + { 403, 837, 732, 770, 941, 1658, 1250, 809, 1407, 1407 }, + { 896, 874, 1071, 381, 1568, 1722, 1437, 2192, 480, 1035 }, + { 640, 1098, 1012, 1032, 684, 1382, 1581, 2106, 416, 865 }, + { 559, 1005, 819, 914, 710, 770, 1418, 920, 838, 1435 }, + { 415, 1258, 1245, 870, 1278, 3067, 770, 1021, 1287, 522 }, + { 406, 990, 601, 1009, 1265, 1265, 1267, 759, 1017, 1277 }, + { 968, 1182, 1329, 788, 1032, 1292, 1705, 1714, 203, 1403 }, + { 732, 877, 1279, 471, 901, 1161, 1545, 1294, 755, 755 } }, + { { 111, 931, 1378, 1185, 1933, 1648, 1148, 1714, 1873, 1307 }, + { 406, 414, 1030, 1023, 1910, 1404, 1313, 1647, 1509, 793 }, + { 342, 640, 575, 1088, 1241, 1349, 1161, 1350, 1756, 1502 }, + { 559, 766, 1185, 357, 1682, 1428, 1329, 1897, 1219, 802 }, + { 473, 909, 1164, 771, 719, 2508, 1427, 1432, 722, 782 }, + { 342, 892, 785, 1145, 1150, 794, 1296, 1550, 973, 1057 }, + { 208, 1036, 1326, 1343, 1606, 3395, 815, 1455, 1618, 712 }, + { 228, 928, 890, 1046, 3499, 1711, 994, 829, 1720, 1318 }, + { 768, 724, 1058, 636, 991, 1075, 1319, 1324, 616, 825 }, + { 305, 1167, 1358, 899, 1587, 1587, 987, 1988, 1332, 501 } } }; //------------------------------------------------------------------------------ +// helper functions for residuals struct VP8Residual. + +void VP8InitResidual(int first, int coeff_type, + VP8Encoder* const enc, VP8Residual* const res) { + res->coeff_type = coeff_type; + res->prob = enc->proba_.coeffs_[coeff_type]; + res->stats = enc->proba_.stats_[coeff_type]; + res->costs = enc->proba_.remapped_costs_[coeff_type]; + res->first = first; +} + +//------------------------------------------------------------------------------ +// Mode costs + +int VP8GetCostLuma4(VP8EncIterator* const it, const int16_t levels[16]) { + const int x = (it->i4_ & 3), y = (it->i4_ >> 2); + VP8Residual res; + VP8Encoder* const enc = it->enc_; + int R = 0; + int ctx; + + VP8InitResidual(0, 3, enc, &res); + ctx = it->top_nz_[x] + it->left_nz_[y]; + VP8SetResidualCoeffs(levels, &res); + R += VP8GetResidualCost(ctx, &res); + return R; +} + +int VP8GetCostLuma16(VP8EncIterator* const it, const VP8ModeScore* const rd) { + VP8Residual res; + VP8Encoder* const enc = it->enc_; + int x, y; + int R = 0; + + VP8IteratorNzToBytes(it); // re-import the non-zero context + + // DC + VP8InitResidual(0, 1, enc, &res); + VP8SetResidualCoeffs(rd->y_dc_levels, &res); + R += VP8GetResidualCost(it->top_nz_[8] + it->left_nz_[8], &res); + + // AC + VP8InitResidual(1, 0, enc, &res); + for (y = 0; y < 4; ++y) { + for (x = 0; x < 4; ++x) { + const int ctx = it->top_nz_[x] + it->left_nz_[y]; + VP8SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + R += VP8GetResidualCost(ctx, &res); + it->top_nz_[x] = it->left_nz_[y] = (res.last >= 0); + } + } + return R; +} + +int VP8GetCostUV(VP8EncIterator* const it, const VP8ModeScore* const rd) { + VP8Residual res; + VP8Encoder* const enc = it->enc_; + int ch, x, y; + int R = 0; + + VP8IteratorNzToBytes(it); // re-import the non-zero context + + VP8InitResidual(0, 2, enc, &res); + for (ch = 0; ch <= 2; ch += 2) { + for (y = 0; y < 2; ++y) { + for (x = 0; x < 2; ++x) { + const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; + VP8SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); + R += VP8GetResidualCost(ctx, &res); + it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = (res.last >= 0); + } + } + } + return R; +} + + +//------------------------------------------------------------------------------ +// Recording of token probabilities. + +// Record proba context used +static int Record(int bit, proba_t* const stats) { + proba_t p = *stats; + if (p >= 0xffff0000u) { // an overflow is inbound. + p = ((p + 1u) >> 1) & 0x7fff7fffu; // -> divide the stats by 2. + } + // record bit count (lower 16 bits) and increment total count (upper 16 bits). + p += 0x00010000u + bit; + *stats = p; + return bit; +} + +// We keep the table-free variant around for reference, in case. +#define USE_LEVEL_CODE_TABLE -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" +// Simulate block coding, but only record statistics. +// Note: no need to record the fixed probas. +int VP8RecordCoeffs(int ctx, const VP8Residual* const res) { + int n = res->first; + // should be stats[VP8EncBands[n]], but it's equivalent for n=0 or 1 + proba_t* s = res->stats[n][ctx]; + if (res->last < 0) { + Record(0, s + 0); + return 0; + } + while (n <= res->last) { + int v; + Record(1, s + 0); // order of record doesn't matter + while ((v = res->coeffs[n++]) == 0) { + Record(0, s + 1); + s = res->stats[VP8EncBands[n]][0]; + } + Record(1, s + 1); + if (!Record(2u < (unsigned int)(v + 1), s + 2)) { // v = -1 or 1 + s = res->stats[VP8EncBands[n]][1]; + } else { + v = abs(v); +#if !defined(USE_LEVEL_CODE_TABLE) + if (!Record(v > 4, s + 3)) { + if (Record(v != 2, s + 4)) + Record(v == 4, s + 5); + } else if (!Record(v > 10, s + 6)) { + Record(v > 6, s + 7); + } else if (!Record((v >= 3 + (8 << 2)), s + 8)) { + Record((v >= 3 + (8 << 1)), s + 9); + } else { + Record((v >= 3 + (8 << 3)), s + 10); + } +#else + if (v > MAX_VARIABLE_LEVEL) { + v = MAX_VARIABLE_LEVEL; + } + + { + const int bits = VP8LevelCodes[v - 1][1]; + int pattern = VP8LevelCodes[v - 1][0]; + int i; + for (i = 0; (pattern >>= 1) != 0; ++i) { + const int mask = 2 << i; + if (pattern & 1) Record(!!(bits & mask), s + 3 + i); + } + } #endif + s = res->stats[VP8EncBands[n]][2]; + } + } + if (n < 16) Record(0, s + 0); + return 1; +} + +//------------------------------------------------------------------------------ diff --git a/drivers/webp/enc/cost.h b/drivers/webp/enc/cost.h index 09b75b699d..20960d6d74 100644 --- a/drivers/webp/enc/cost.h +++ b/drivers/webp/enc/cost.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Cost tables for level and modes. @@ -12,14 +14,32 @@ #ifndef WEBP_ENC_COST_H_ #define WEBP_ENC_COST_H_ +#include <assert.h> +#include <stdlib.h> #include "./vp8enci.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -extern const uint16_t VP8LevelFixedCosts[2048]; // approximate cost per level -extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p) +// On-the-fly info about the current set of residuals. Handy to avoid +// passing zillions of params. +typedef struct VP8Residual VP8Residual; +struct VP8Residual { + int first; + int last; + const int16_t* coeffs; + + int coeff_type; + ProbaArray* prob; + StatsArray* stats; + CostArrayPtr costs; +}; + +void VP8InitResidual(int first, int coeff_type, + VP8Encoder* const enc, VP8Residual* const res); + +int VP8RecordCoeffs(int ctx, const VP8Residual* const res); // Cost of coding one event with probability 'proba'. static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) { @@ -28,7 +48,7 @@ static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) { // Level cost calculations extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2]; -void VP8CalculateLevelCosts(VP8Proba* const proba); +void VP8CalculateLevelCosts(VP8EncProba* const proba); static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) { return VP8LevelFixedCosts[level] + table[(level > MAX_VARIABLE_LEVEL) ? MAX_VARIABLE_LEVEL : level]; @@ -41,7 +61,7 @@ extern const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES]; //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/enc/filter.c b/drivers/webp/enc/filter.c index 7fb78a3949..1a4dd947fb 100644 --- a/drivers/webp/enc/filter.c +++ b/drivers/webp/enc/filter.c @@ -1,194 +1,68 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Selecting filter level // // Author: somnath@google.com (Somnath Banerjee) +#include <assert.h> #include "./vp8enci.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -// NOTE: clip1, tables and InitTables are repeated entries of dsp.c -static uint8_t abs0[255 + 255 + 1]; // abs(i) -static uint8_t abs1[255 + 255 + 1]; // abs(i)>>1 -static int8_t sclip1[1020 + 1020 + 1]; // clips [-1020, 1020] to [-128, 127] -static int8_t sclip2[112 + 112 + 1]; // clips [-112, 112] to [-16, 15] -static uint8_t clip1[255 + 510 + 1]; // clips [-255,510] to [0,255] - -static int tables_ok = 0; - -static void InitTables(void) { - if (!tables_ok) { - int i; - for (i = -255; i <= 255; ++i) { - abs0[255 + i] = (i < 0) ? -i : i; - abs1[255 + i] = abs0[255 + i] >> 1; - } - for (i = -1020; i <= 1020; ++i) { - sclip1[1020 + i] = (i < -128) ? -128 : (i > 127) ? 127 : i; - } - for (i = -112; i <= 112; ++i) { - sclip2[112 + i] = (i < -16) ? -16 : (i > 15) ? 15 : i; - } - for (i = -255; i <= 255 + 255; ++i) { - clip1[255 + i] = (i < 0) ? 0 : (i > 255) ? 255 : i; - } - tables_ok = 1; - } -} - -//------------------------------------------------------------------------------ -// Edge filtering functions - -// 4 pixels in, 2 pixels out -static WEBP_INLINE void do_filter2(uint8_t* p, int step) { - const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; - const int a = 3 * (q0 - p0) + sclip1[1020 + p1 - q1]; - const int a1 = sclip2[112 + ((a + 4) >> 3)]; - const int a2 = sclip2[112 + ((a + 3) >> 3)]; - p[-step] = clip1[255 + p0 + a2]; - p[ 0] = clip1[255 + q0 - a1]; -} - -// 4 pixels in, 4 pixels out -static WEBP_INLINE void do_filter4(uint8_t* p, int step) { - const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; - const int a = 3 * (q0 - p0); - const int a1 = sclip2[112 + ((a + 4) >> 3)]; - const int a2 = sclip2[112 + ((a + 3) >> 3)]; - const int a3 = (a1 + 1) >> 1; - p[-2*step] = clip1[255 + p1 + a3]; - p[- step] = clip1[255 + p0 + a2]; - p[ 0] = clip1[255 + q0 - a1]; - p[ step] = clip1[255 + q1 - a3]; -} - -// high edge-variance -static WEBP_INLINE int hev(const uint8_t* p, int step, int thresh) { - const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; - return (abs0[255 + p1 - p0] > thresh) || (abs0[255 + q1 - q0] > thresh); -} - -static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int thresh) { - const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; - return (2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) <= thresh; -} - -static WEBP_INLINE int needs_filter2(const uint8_t* p, - int step, int t, int it) { - const int p3 = p[-4*step], p2 = p[-3*step], p1 = p[-2*step], p0 = p[-step]; - const int q0 = p[0], q1 = p[step], q2 = p[2*step], q3 = p[3*step]; - if ((2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) > t) - return 0; - return abs0[255 + p3 - p2] <= it && abs0[255 + p2 - p1] <= it && - abs0[255 + p1 - p0] <= it && abs0[255 + q3 - q2] <= it && - abs0[255 + q2 - q1] <= it && abs0[255 + q1 - q0] <= it; +#include "../dsp/dsp.h" + +// This table gives, for a given sharpness, the filtering strength to be +// used (at least) in order to filter a given edge step delta. +// This is constructed by brute force inspection: for all delta, we iterate +// over all possible filtering strength / thresh until needs_filter() returns +// true. +#define MAX_DELTA_SIZE 64 +static const uint8_t kLevelsFromDelta[8][MAX_DELTA_SIZE] = { + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 }, + { 0, 1, 2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 17, 18, + 20, 21, 23, 24, 26, 27, 29, 30, 32, 33, 35, 36, 38, 39, 41, 42, + 44, 45, 47, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63 }, + { 0, 1, 2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 19, + 20, 22, 23, 25, 26, 28, 29, 31, 32, 34, 35, 37, 38, 40, 41, 43, + 44, 46, 47, 49, 50, 52, 53, 55, 56, 58, 59, 61, 62, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63 }, + { 0, 1, 2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 15, 16, 18, 19, + 21, 22, 24, 25, 27, 28, 30, 31, 33, 34, 36, 37, 39, 40, 42, 43, + 45, 46, 48, 49, 51, 52, 54, 55, 57, 58, 60, 61, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63 }, + { 0, 1, 2, 3, 5, 6, 7, 8, 9, 11, 12, 14, 15, 17, 18, 20, + 21, 23, 24, 26, 27, 29, 30, 32, 33, 35, 36, 38, 39, 41, 42, 44, + 45, 47, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63 }, + { 0, 1, 2, 4, 5, 7, 8, 9, 11, 12, 13, 15, 16, 17, 19, 20, + 22, 23, 25, 26, 28, 29, 31, 32, 34, 35, 37, 38, 40, 41, 43, 44, + 46, 47, 49, 50, 52, 53, 55, 56, 58, 59, 61, 62, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63 }, + { 0, 1, 2, 4, 5, 7, 8, 9, 11, 12, 13, 15, 16, 18, 19, 21, + 22, 24, 25, 27, 28, 30, 31, 33, 34, 36, 37, 39, 40, 42, 43, 45, + 46, 48, 49, 51, 52, 54, 55, 57, 58, 60, 61, 63, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63 }, + { 0, 1, 2, 4, 5, 7, 8, 9, 11, 12, 14, 15, 17, 18, 20, 21, + 23, 24, 26, 27, 29, 30, 32, 33, 35, 36, 38, 39, 41, 42, 44, 45, + 47, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63 } +}; + +int VP8FilterStrengthFromDelta(int sharpness, int delta) { + const int pos = (delta < MAX_DELTA_SIZE) ? delta : MAX_DELTA_SIZE - 1; + assert(sharpness >= 0 && sharpness <= 7); + return kLevelsFromDelta[sharpness][pos]; } //------------------------------------------------------------------------------ -// Simple In-loop filtering (Paragraph 15.2) - -static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { - int i; - for (i = 0; i < 16; ++i) { - if (needs_filter(p + i, stride, thresh)) { - do_filter2(p + i, stride); - } - } -} - -static void SimpleHFilter16(uint8_t* p, int stride, int thresh) { - int i; - for (i = 0; i < 16; ++i) { - if (needs_filter(p + i * stride, 1, thresh)) { - do_filter2(p + i * stride, 1); - } - } -} - -static void SimpleVFilter16i(uint8_t* p, int stride, int thresh) { - int k; - for (k = 3; k > 0; --k) { - p += 4 * stride; - SimpleVFilter16(p, stride, thresh); - } -} - -static void SimpleHFilter16i(uint8_t* p, int stride, int thresh) { - int k; - for (k = 3; k > 0; --k) { - p += 4; - SimpleHFilter16(p, stride, thresh); - } -} - -//------------------------------------------------------------------------------ -// Complex In-loop filtering (Paragraph 15.3) - -static WEBP_INLINE void FilterLoop24(uint8_t* p, - int hstride, int vstride, int size, - int thresh, int ithresh, int hev_thresh) { - while (size-- > 0) { - if (needs_filter2(p, hstride, thresh, ithresh)) { - if (hev(p, hstride, hev_thresh)) { - do_filter2(p, hstride); - } else { - do_filter4(p, hstride); - } - } - p += vstride; - } -} - -// on three inner edges -static void VFilter16i(uint8_t* p, int stride, - int thresh, int ithresh, int hev_thresh) { - int k; - for (k = 3; k > 0; --k) { - p += 4 * stride; - FilterLoop24(p, stride, 1, 16, thresh, ithresh, hev_thresh); - } -} - -static void HFilter16i(uint8_t* p, int stride, - int thresh, int ithresh, int hev_thresh) { - int k; - for (k = 3; k > 0; --k) { - p += 4; - FilterLoop24(p, 1, stride, 16, thresh, ithresh, hev_thresh); - } -} - -static void VFilter8i(uint8_t* u, uint8_t* v, int stride, - int thresh, int ithresh, int hev_thresh) { - FilterLoop24(u + 4 * stride, stride, 1, 8, thresh, ithresh, hev_thresh); - FilterLoop24(v + 4 * stride, stride, 1, 8, thresh, ithresh, hev_thresh); -} - -static void HFilter8i(uint8_t* u, uint8_t* v, int stride, - int thresh, int ithresh, int hev_thresh) { - FilterLoop24(u + 4, 1, stride, 8, thresh, ithresh, hev_thresh); - FilterLoop24(v + 4, 1, stride, 8, thresh, ithresh, hev_thresh); -} - -//------------------------------------------------------------------------------ - -void (*VP8EncVFilter16i)(uint8_t*, int, int, int, int) = VFilter16i; -void (*VP8EncHFilter16i)(uint8_t*, int, int, int, int) = HFilter16i; -void (*VP8EncVFilter8i)(uint8_t*, uint8_t*, int, int, int, int) = VFilter8i; -void (*VP8EncHFilter8i)(uint8_t*, uint8_t*, int, int, int, int) = HFilter8i; - -void (*VP8EncSimpleVFilter16i)(uint8_t*, int, int) = SimpleVFilter16i; -void (*VP8EncSimpleHFilter16i)(uint8_t*, int, int) = SimpleHFilter16i; - -//------------------------------------------------------------------------------ // Paragraph 15.4: compute the inner-edge filtering strength static int GetILevel(int sharpness, int level) { @@ -211,22 +85,22 @@ static void DoFilter(const VP8EncIterator* const it, int level) { const int ilevel = GetILevel(enc->config_->filter_sharpness, level); const int limit = 2 * level + ilevel; - uint8_t* const y_dst = it->yuv_out2_ + Y_OFF; - uint8_t* const u_dst = it->yuv_out2_ + U_OFF; - uint8_t* const v_dst = it->yuv_out2_ + V_OFF; + uint8_t* const y_dst = it->yuv_out2_ + Y_OFF_ENC; + uint8_t* const u_dst = it->yuv_out2_ + U_OFF_ENC; + uint8_t* const v_dst = it->yuv_out2_ + V_OFF_ENC; // copy current block to yuv_out2_ - memcpy(y_dst, it->yuv_out_, YUV_SIZE * sizeof(uint8_t)); + memcpy(y_dst, it->yuv_out_, YUV_SIZE_ENC * sizeof(uint8_t)); if (enc->filter_hdr_.simple_ == 1) { // simple - VP8EncSimpleHFilter16i(y_dst, BPS, limit); - VP8EncSimpleVFilter16i(y_dst, BPS, limit); + VP8SimpleHFilter16i(y_dst, BPS, limit); + VP8SimpleVFilter16i(y_dst, BPS, limit); } else { // complex const int hev_thresh = (level >= 40) ? 2 : (level >= 15) ? 1 : 0; - VP8EncHFilter16i(y_dst, BPS, limit, ilevel, hev_thresh); - VP8EncHFilter8i(u_dst, v_dst, BPS, limit, ilevel, hev_thresh); - VP8EncVFilter16i(y_dst, BPS, limit, ilevel, hev_thresh); - VP8EncVFilter8i(u_dst, v_dst, BPS, limit, ilevel, hev_thresh); + VP8HFilter16i(y_dst, BPS, limit, ilevel, hev_thresh); + VP8HFilter8i(u_dst, v_dst, BPS, limit, ilevel, hev_thresh); + VP8VFilter16i(y_dst, BPS, limit, ilevel, hev_thresh); + VP8VFilter8i(u_dst, v_dst, BPS, limit, ilevel, hev_thresh); } } @@ -321,13 +195,16 @@ static double GetMBSSIM(const uint8_t* yuv1, const uint8_t* yuv2) { // compute SSIM in a 10 x 10 window for (x = 3; x < 13; x++) { for (y = 3; y < 13; y++) { - VP8SSIMAccumulate(yuv1 + Y_OFF, BPS, yuv2 + Y_OFF, BPS, x, y, 16, 16, &s); + VP8SSIMAccumulate(yuv1 + Y_OFF_ENC, BPS, yuv2 + Y_OFF_ENC, BPS, + x, y, 16, 16, &s); } } for (x = 1; x < 7; x++) { for (y = 1; y < 7; y++) { - VP8SSIMAccumulate(yuv1 + U_OFF, BPS, yuv2 + U_OFF, BPS, x, y, 8, 8, &s); - VP8SSIMAccumulate(yuv1 + V_OFF, BPS, yuv2 + V_OFF, BPS, x, y, 8, 8, &s); + VP8SSIMAccumulate(yuv1 + U_OFF_ENC, BPS, yuv2 + U_OFF_ENC, BPS, + x, y, 8, 8, &s); + VP8SSIMAccumulate(yuv1 + V_OFF_ENC, BPS, yuv2 + V_OFF_ENC, BPS, + x, y, 8, 8, &s); } } return VP8SSIMGet(&s); @@ -338,28 +215,28 @@ static double GetMBSSIM(const uint8_t* yuv1, const uint8_t* yuv2) { // loop filter strength void VP8InitFilter(VP8EncIterator* const it) { - int s, i; - if (!it->lf_stats_) return; - - InitTables(); - for (s = 0; s < NUM_MB_SEGMENTS; s++) { - for (i = 0; i < MAX_LF_LEVELS; i++) { - (*it->lf_stats_)[s][i] = 0; + if (it->lf_stats_ != NULL) { + int s, i; + for (s = 0; s < NUM_MB_SEGMENTS; s++) { + for (i = 0; i < MAX_LF_LEVELS; i++) { + (*it->lf_stats_)[s][i] = 0; + } } } } void VP8StoreFilterStats(VP8EncIterator* const it) { int d; + VP8Encoder* const enc = it->enc_; const int s = it->mb_->segment_; - const int level0 = it->enc_->dqm_[s].fstrength_; // TODO: ref_lf_delta[] + const int level0 = enc->dqm_[s].fstrength_; // TODO: ref_lf_delta[] // explore +/-quant range of values around level0 - const int delta_min = -it->enc_->dqm_[s].quant_; - const int delta_max = it->enc_->dqm_[s].quant_; + const int delta_min = -enc->dqm_[s].quant_; + const int delta_max = enc->dqm_[s].quant_; const int step_size = (delta_max - delta_min >= 4) ? 4 : 1; - if (!it->lf_stats_) return; + if (it->lf_stats_ == NULL) return; // NOTE: Currently we are applying filter only across the sublock edges // There are two reasons for that. @@ -383,27 +260,40 @@ void VP8StoreFilterStats(VP8EncIterator* const it) { } void VP8AdjustFilterStrength(VP8EncIterator* const it) { - int s; VP8Encoder* const enc = it->enc_; - - if (!it->lf_stats_) { - return; - } - for (s = 0; s < NUM_MB_SEGMENTS; s++) { - int i, best_level = 0; - // Improvement over filter level 0 should be at least 1e-5 (relatively) - double best_v = 1.00001 * (*it->lf_stats_)[s][0]; - for (i = 1; i < MAX_LF_LEVELS; i++) { - const double v = (*it->lf_stats_)[s][i]; - if (v > best_v) { - best_v = v; - best_level = i; + if (it->lf_stats_ != NULL) { + int s; + for (s = 0; s < NUM_MB_SEGMENTS; s++) { + int i, best_level = 0; + // Improvement over filter level 0 should be at least 1e-5 (relatively) + double best_v = 1.00001 * (*it->lf_stats_)[s][0]; + for (i = 1; i < MAX_LF_LEVELS; i++) { + const double v = (*it->lf_stats_)[s][i]; + if (v > best_v) { + best_v = v; + best_level = i; + } } + enc->dqm_[s].fstrength_ = best_level; } - enc->dqm_[s].fstrength_ = best_level; + } else if (enc->config_->filter_strength > 0) { + int max_level = 0; + int s; + for (s = 0; s < NUM_MB_SEGMENTS; s++) { + VP8SegmentInfo* const dqm = &enc->dqm_[s]; + // this '>> 3' accounts for some inverse WHT scaling + const int delta = (dqm->max_edge_ * dqm->y2_.q_[1]) >> 3; + const int level = + VP8FilterStrengthFromDelta(enc->filter_hdr_.sharpness_, delta); + if (level > dqm->fstrength_) { + dqm->fstrength_ = level; + } + if (max_level < dqm->fstrength_) { + max_level = dqm->fstrength_; + } + } + enc->filter_hdr_.level_ = max_level; } } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif +// ----------------------------------------------------------------------------- diff --git a/drivers/webp/enc/frame.c b/drivers/webp/enc/frame.c index bdd360069b..5b7a40b9ad 100644 --- a/drivers/webp/enc/frame.c +++ b/drivers/webp/enc/frame.c @@ -1,61 +1,98 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // frame coding and analysis // // Author: Skal (pascal.massimino@gmail.com) -#include <assert.h> -#include <stdlib.h> #include <string.h> #include <math.h> -#include "./vp8enci.h" #include "./cost.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "./vp8enci.h" +#include "../dsp/dsp.h" +#include "../webp/format_constants.h" // RIFF constants #define SEGMENT_VISU 0 #define DEBUG_SEARCH 0 // useful to track search convergence -// On-the-fly info about the current set of residuals. Handy to avoid -// passing zillions of params. -typedef struct { - int first; - int last; - const int16_t* coeffs; - - int coeff_type; - ProbaArray* prob; - StatsArray* stats; - CostArray* cost; -} VP8Residual; +//------------------------------------------------------------------------------ +// multi-pass convergence + +#define HEADER_SIZE_ESTIMATE (RIFF_HEADER_SIZE + CHUNK_HEADER_SIZE + \ + VP8_FRAME_HEADER_SIZE) +#define DQ_LIMIT 0.4 // convergence is considered reached if dq < DQ_LIMIT +// we allow 2k of extra head-room in PARTITION0 limit. +#define PARTITION0_SIZE_LIMIT ((VP8_MAX_PARTITION0_SIZE - 2048ULL) << 11) + +typedef struct { // struct for organizing convergence in either size or PSNR + int is_first; + float dq; + float q, last_q; + double value, last_value; // PSNR or size + double target; + int do_size_search; +} PassStats; + +static int InitPassStats(const VP8Encoder* const enc, PassStats* const s) { + const uint64_t target_size = (uint64_t)enc->config_->target_size; + const int do_size_search = (target_size != 0); + const float target_PSNR = enc->config_->target_PSNR; + + s->is_first = 1; + s->dq = 10.f; + s->q = s->last_q = enc->config_->quality; + s->target = do_size_search ? (double)target_size + : (target_PSNR > 0.) ? target_PSNR + : 40.; // default, just in case + s->value = s->last_value = 0.; + s->do_size_search = do_size_search; + return do_size_search; +} + +static float Clamp(float v, float min, float max) { + return (v < min) ? min : (v > max) ? max : v; +} + +static float ComputeNextQ(PassStats* const s) { + float dq; + if (s->is_first) { + dq = (s->value > s->target) ? -s->dq : s->dq; + s->is_first = 0; + } else if (s->value != s->last_value) { + const double slope = (s->target - s->value) / (s->last_value - s->value); + dq = (float)(slope * (s->last_q - s->q)); + } else { + dq = 0.; // we're done?! + } + // Limit variable to avoid large swings. + s->dq = Clamp(dq, -30.f, 30.f); + s->last_q = s->q; + s->last_value = s->value; + s->q = Clamp(s->q + s->dq, 0.f, 100.f); + return s->q; +} //------------------------------------------------------------------------------ // Tables for level coding -const uint8_t VP8EncBands[16 + 1] = { - 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, - 0 // sentinel -}; - -static const uint8_t kCat3[] = { 173, 148, 140 }; -static const uint8_t kCat4[] = { 176, 155, 140, 135 }; -static const uint8_t kCat5[] = { 180, 157, 141, 134, 130 }; -static const uint8_t kCat6[] = +const uint8_t VP8Cat3[] = { 173, 148, 140 }; +const uint8_t VP8Cat4[] = { 176, 155, 140, 135 }; +const uint8_t VP8Cat5[] = { 180, 157, 141, 134, 130 }; +const uint8_t VP8Cat6[] = { 254, 254, 243, 230, 196, 177, 153, 140, 133, 130, 129 }; //------------------------------------------------------------------------------ // Reset the statistics about: number of skips, token proba, level cost,... static void ResetStats(VP8Encoder* const enc) { - VP8Proba* const proba = &enc->proba_; + VP8EncProba* const proba = &enc->proba_; VP8CalculateLevelCosts(proba); proba->nb_skip_ = 0; } @@ -71,7 +108,7 @@ static int CalcSkipProba(uint64_t nb, uint64_t total) { // Returns the bit-cost for coding the skip probability. static int FinalizeSkipProba(VP8Encoder* const enc) { - VP8Proba* const proba = &enc->proba_; + VP8EncProba* const proba = &enc->proba_; const int nb_mbs = enc->mb_w_ * enc->mb_h_; const int nb_events = proba->nb_skip_; int size; @@ -86,82 +123,6 @@ static int FinalizeSkipProba(VP8Encoder* const enc) { return size; } -//------------------------------------------------------------------------------ -// Recording of token probabilities. - -static void ResetTokenStats(VP8Encoder* const enc) { - VP8Proba* const proba = &enc->proba_; - memset(proba->stats_, 0, sizeof(proba->stats_)); -} - -// Record proba context used -static int Record(int bit, proba_t* const stats) { - proba_t p = *stats; - if (p >= 0xffff0000u) { // an overflow is inbound. - p = ((p + 1u) >> 1) & 0x7fff7fffu; // -> divide the stats by 2. - } - // record bit count (lower 16 bits) and increment total count (upper 16 bits). - p += 0x00010000u + bit; - *stats = p; - return bit; -} - -// We keep the table free variant around for reference, in case. -#define USE_LEVEL_CODE_TABLE - -// Simulate block coding, but only record statistics. -// Note: no need to record the fixed probas. -static int RecordCoeffs(int ctx, const VP8Residual* const res) { - int n = res->first; - proba_t* s = res->stats[VP8EncBands[n]][ctx]; - if (res->last < 0) { - Record(0, s + 0); - return 0; - } - while (n <= res->last) { - int v; - Record(1, s + 0); - while ((v = res->coeffs[n++]) == 0) { - Record(0, s + 1); - s = res->stats[VP8EncBands[n]][0]; - } - Record(1, s + 1); - if (!Record(2u < (unsigned int)(v + 1), s + 2)) { // v = -1 or 1 - s = res->stats[VP8EncBands[n]][1]; - } else { - v = abs(v); -#if !defined(USE_LEVEL_CODE_TABLE) - if (!Record(v > 4, s + 3)) { - if (Record(v != 2, s + 4)) - Record(v == 4, s + 5); - } else if (!Record(v > 10, s + 6)) { - Record(v > 6, s + 7); - } else if (!Record((v >= 3 + (8 << 2)), s + 8)) { - Record((v >= 3 + (8 << 1)), s + 9); - } else { - Record((v >= 3 + (8 << 3)), s + 10); - } -#else - if (v > MAX_VARIABLE_LEVEL) - v = MAX_VARIABLE_LEVEL; - - { - const int bits = VP8LevelCodes[v - 1][1]; - int pattern = VP8LevelCodes[v - 1][0]; - int i; - for (i = 0; (pattern >>= 1) != 0; ++i) { - const int mask = 2 << i; - if (pattern & 1) Record(!!(bits & mask), s + 3 + i); - } - } -#endif - s = res->stats[VP8EncBands[n]][2]; - } - } - if (n < 16) Record(0, s + 0); - return 1; -} - // Collect statistics and deduce probabilities for next coding pass. // Return the total bit-cost for coding the probability updates. static int CalcTokenProba(int nb, int total) { @@ -174,8 +135,12 @@ static int BranchCost(int nb, int total, int proba) { return nb * VP8BitCost(1, proba) + (total - nb) * VP8BitCost(0, proba); } -static int FinalizeTokenProbas(VP8Encoder* const enc) { - VP8Proba* const proba = &enc->proba_; +static void ResetTokenStats(VP8Encoder* const enc) { + VP8EncProba* const proba = &enc->proba_; + memset(proba->stats_, 0, sizeof(proba->stats_)); +} + +static int FinalizeTokenProbas(VP8EncProba* const proba) { int has_changed = 0; int size = 0; int t, b, c, p; @@ -212,129 +177,44 @@ static int FinalizeTokenProbas(VP8Encoder* const enc) { } //------------------------------------------------------------------------------ -// helper functions for residuals struct VP8Residual. - -static void InitResidual(int first, int coeff_type, - VP8Encoder* const enc, VP8Residual* const res) { - res->coeff_type = coeff_type; - res->prob = enc->proba_.coeffs_[coeff_type]; - res->stats = enc->proba_.stats_[coeff_type]; - res->cost = enc->proba_.level_cost_[coeff_type]; - res->first = first; -} +// Finalize Segment probability based on the coding tree -static void SetResidualCoeffs(const int16_t* const coeffs, - VP8Residual* const res) { - int n; - res->last = -1; - for (n = 15; n >= res->first; --n) { - if (coeffs[n]) { - res->last = n; - break; - } - } - res->coeffs = coeffs; +static int GetProba(int a, int b) { + const int total = a + b; + return (total == 0) ? 255 // that's the default probability. + : (255 * a + total / 2) / total; // rounded proba } -//------------------------------------------------------------------------------ -// Mode costs - -static int GetResidualCost(int ctx, const VP8Residual* const res) { - int n = res->first; - int p0 = res->prob[VP8EncBands[n]][ctx][0]; - const uint16_t* t = res->cost[VP8EncBands[n]][ctx]; - int cost; +static void SetSegmentProbas(VP8Encoder* const enc) { + int p[NUM_MB_SEGMENTS] = { 0 }; + int n; - if (res->last < 0) { - return VP8BitCost(0, p0); - } - cost = 0; - while (n <= res->last) { - const int v = res->coeffs[n]; - const int b = VP8EncBands[n + 1]; - ++n; - if (v == 0) { - // short-case for VP8LevelCost(t, 0) (note: VP8LevelFixedCosts[0] == 0): - cost += t[0]; - t = res->cost[b][0]; - continue; - } - cost += VP8BitCost(1, p0); - if (2u >= (unsigned int)(v + 1)) { // v = -1 or 1 - // short-case for "VP8LevelCost(t, 1)" (256 is VP8LevelFixedCosts[1]): - cost += 256 + t[1]; - p0 = res->prob[b][1][0]; - t = res->cost[b][1]; - } else { - cost += VP8LevelCost(t, abs(v)); - p0 = res->prob[b][2][0]; - t = res->cost[b][2]; - } + for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) { + const VP8MBInfo* const mb = &enc->mb_info_[n]; + p[mb->segment_]++; } - if (n < 16) cost += VP8BitCost(0, p0); - return cost; -} - -int VP8GetCostLuma4(VP8EncIterator* const it, const int16_t levels[16]) { - const int x = (it->i4_ & 3), y = (it->i4_ >> 2); - VP8Residual res; - VP8Encoder* const enc = it->enc_; - int R = 0; - int ctx; - - InitResidual(0, 3, enc, &res); - ctx = it->top_nz_[x] + it->left_nz_[y]; - SetResidualCoeffs(levels, &res); - R += GetResidualCost(ctx, &res); - return R; -} - -int VP8GetCostLuma16(VP8EncIterator* const it, const VP8ModeScore* const rd) { - VP8Residual res; - VP8Encoder* const enc = it->enc_; - int x, y; - int R = 0; - - VP8IteratorNzToBytes(it); // re-import the non-zero context - - // DC - InitResidual(0, 1, enc, &res); - SetResidualCoeffs(rd->y_dc_levels, &res); - R += GetResidualCost(it->top_nz_[8] + it->left_nz_[8], &res); - - // AC - InitResidual(1, 0, enc, &res); - for (y = 0; y < 4; ++y) { - for (x = 0; x < 4; ++x) { - const int ctx = it->top_nz_[x] + it->left_nz_[y]; - SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); - R += GetResidualCost(ctx, &res); - it->top_nz_[x] = it->left_nz_[y] = (res.last >= 0); + if (enc->pic_->stats != NULL) { + for (n = 0; n < NUM_MB_SEGMENTS; ++n) { + enc->pic_->stats->segment_size[n] = p[n]; } } - return R; -} - -int VP8GetCostUV(VP8EncIterator* const it, const VP8ModeScore* const rd) { - VP8Residual res; - VP8Encoder* const enc = it->enc_; - int ch, x, y; - int R = 0; - - VP8IteratorNzToBytes(it); // re-import the non-zero context - - InitResidual(0, 2, enc, &res); - for (ch = 0; ch <= 2; ch += 2) { - for (y = 0; y < 2; ++y) { - for (x = 0; x < 2; ++x) { - const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; - SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); - R += GetResidualCost(ctx, &res); - it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = (res.last >= 0); - } - } + if (enc->segment_hdr_.num_segments_ > 1) { + uint8_t* const probas = enc->proba_.segments_; + probas[0] = GetProba(p[0] + p[1], p[2] + p[3]); + probas[1] = GetProba(p[0], p[1]); + probas[2] = GetProba(p[2], p[3]); + + enc->segment_hdr_.update_map_ = + (probas[0] != 255) || (probas[1] != 255) || (probas[2] != 255); + enc->segment_hdr_.size_ = + p[0] * (VP8BitCost(0, probas[0]) + VP8BitCost(0, probas[1])) + + p[1] * (VP8BitCost(0, probas[0]) + VP8BitCost(1, probas[1])) + + p[2] * (VP8BitCost(1, probas[0]) + VP8BitCost(0, probas[2])) + + p[3] * (VP8BitCost(1, probas[0]) + VP8BitCost(1, probas[2])); + } else { + enc->segment_hdr_.update_map_ = 0; + enc->segment_hdr_.size_ = 0; } - return R; } //------------------------------------------------------------------------------ @@ -342,7 +222,8 @@ int VP8GetCostUV(VP8EncIterator* const it, const VP8ModeScore* const rd) { static int PutCoeffs(VP8BitWriter* const bw, int ctx, const VP8Residual* res) { int n = res->first; - const uint8_t* p = res->prob[VP8EncBands[n]][ctx]; + // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 + const uint8_t* p = res->prob[n][ctx]; if (!VP8PutBit(bw, res->last >= 0, p[0])) { return 0; } @@ -371,30 +252,30 @@ static int PutCoeffs(VP8BitWriter* const bw, int ctx, const VP8Residual* res) { } else { int mask; const uint8_t* tab; - if (v < 3 + (8 << 1)) { // kCat3 (3b) + if (v < 3 + (8 << 1)) { // VP8Cat3 (3b) VP8PutBit(bw, 0, p[8]); VP8PutBit(bw, 0, p[9]); v -= 3 + (8 << 0); mask = 1 << 2; - tab = kCat3; - } else if (v < 3 + (8 << 2)) { // kCat4 (4b) + tab = VP8Cat3; + } else if (v < 3 + (8 << 2)) { // VP8Cat4 (4b) VP8PutBit(bw, 0, p[8]); VP8PutBit(bw, 1, p[9]); v -= 3 + (8 << 1); mask = 1 << 3; - tab = kCat4; - } else if (v < 3 + (8 << 3)) { // kCat5 (5b) + tab = VP8Cat4; + } else if (v < 3 + (8 << 3)) { // VP8Cat5 (5b) VP8PutBit(bw, 1, p[8]); VP8PutBit(bw, 0, p[10]); v -= 3 + (8 << 2); mask = 1 << 4; - tab = kCat5; - } else { // kCat6 (11b) + tab = VP8Cat5; + } else { // VP8Cat6 (11b) VP8PutBit(bw, 1, p[8]); VP8PutBit(bw, 1, p[10]); v -= 3 + (8 << 3); mask = 1 << 10; - tab = kCat6; + tab = VP8Cat6; } while (mask) { VP8PutBit(bw, !!(v & mask), *tab++); @@ -411,8 +292,7 @@ static int PutCoeffs(VP8BitWriter* const bw, int ctx, const VP8Residual* res) { return 1; } -static void CodeResiduals(VP8BitWriter* const bw, - VP8EncIterator* const it, +static void CodeResiduals(VP8BitWriter* const bw, VP8EncIterator* const it, const VP8ModeScore* const rd) { int x, y, ch; VP8Residual res; @@ -425,32 +305,32 @@ static void CodeResiduals(VP8BitWriter* const bw, pos1 = VP8BitWriterPos(bw); if (i16) { - InitResidual(0, 1, enc, &res); - SetResidualCoeffs(rd->y_dc_levels, &res); + VP8InitResidual(0, 1, enc, &res); + VP8SetResidualCoeffs(rd->y_dc_levels, &res); it->top_nz_[8] = it->left_nz_[8] = PutCoeffs(bw, it->top_nz_[8] + it->left_nz_[8], &res); - InitResidual(1, 0, enc, &res); + VP8InitResidual(1, 0, enc, &res); } else { - InitResidual(0, 3, enc, &res); + VP8InitResidual(0, 3, enc, &res); } // luma-AC for (y = 0; y < 4; ++y) { for (x = 0; x < 4; ++x) { const int ctx = it->top_nz_[x] + it->left_nz_[y]; - SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + VP8SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); it->top_nz_[x] = it->left_nz_[y] = PutCoeffs(bw, ctx, &res); } } pos2 = VP8BitWriterPos(bw); // U/V - InitResidual(0, 2, enc, &res); + VP8InitResidual(0, 2, enc, &res); for (ch = 0; ch <= 2; ch += 2) { for (y = 0; y < 2; ++y) { for (x = 0; x < 2; ++x) { const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; - SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); + VP8SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = PutCoeffs(bw, ctx, &res); } @@ -475,33 +355,33 @@ static void RecordResiduals(VP8EncIterator* const it, VP8IteratorNzToBytes(it); if (it->mb_->type_ == 1) { // i16x16 - InitResidual(0, 1, enc, &res); - SetResidualCoeffs(rd->y_dc_levels, &res); + VP8InitResidual(0, 1, enc, &res); + VP8SetResidualCoeffs(rd->y_dc_levels, &res); it->top_nz_[8] = it->left_nz_[8] = - RecordCoeffs(it->top_nz_[8] + it->left_nz_[8], &res); - InitResidual(1, 0, enc, &res); + VP8RecordCoeffs(it->top_nz_[8] + it->left_nz_[8], &res); + VP8InitResidual(1, 0, enc, &res); } else { - InitResidual(0, 3, enc, &res); + VP8InitResidual(0, 3, enc, &res); } // luma-AC for (y = 0; y < 4; ++y) { for (x = 0; x < 4; ++x) { const int ctx = it->top_nz_[x] + it->left_nz_[y]; - SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); - it->top_nz_[x] = it->left_nz_[y] = RecordCoeffs(ctx, &res); + VP8SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + it->top_nz_[x] = it->left_nz_[y] = VP8RecordCoeffs(ctx, &res); } } // U/V - InitResidual(0, 2, enc, &res); + VP8InitResidual(0, 2, enc, &res); for (ch = 0; ch <= 2; ch += 2) { for (y = 0; y < 2; ++y) { for (x = 0; x < 2; ++x) { const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; - SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); + VP8SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = - RecordCoeffs(ctx, &res); + VP8RecordCoeffs(ctx, &res); } } } @@ -512,176 +392,59 @@ static void RecordResiduals(VP8EncIterator* const it, //------------------------------------------------------------------------------ // Token buffer -#ifdef USE_TOKEN_BUFFER - -void VP8TBufferInit(VP8TBuffer* const b) { - b->rows_ = NULL; - b->tokens_ = NULL; - b->last_ = &b->rows_; - b->left_ = 0; - b->error_ = 0; -} - -int VP8TBufferNewPage(VP8TBuffer* const b) { - VP8Tokens* const page = b->error_ ? NULL : (VP8Tokens*)malloc(sizeof(*page)); - if (page == NULL) { - b->error_ = 1; - return 0; - } - *b->last_ = page; - b->last_ = &page->next_; - b->left_ = MAX_NUM_TOKEN; - b->tokens_ = page->tokens_; - return 1; -} - -void VP8TBufferClear(VP8TBuffer* const b) { - if (b != NULL) { - const VP8Tokens* p = b->rows_; - while (p != NULL) { - const VP8Tokens* const next = p->next_; - free((void*)p); - p = next; - } - VP8TBufferInit(b); - } -} - -int VP8EmitTokens(const VP8TBuffer* const b, VP8BitWriter* const bw, - const uint8_t* const probas) { - VP8Tokens* p = b->rows_; - if (b->error_) return 0; - while (p != NULL) { - const int N = (p->next_ == NULL) ? b->left_ : 0; - int n = MAX_NUM_TOKEN; - while (n-- > N) { - VP8PutBit(bw, (p->tokens_[n] >> 15) & 1, probas[p->tokens_[n] & 0x7fff]); - } - p = p->next_; - } - return 1; -} - -#define TOKEN_ID(b, ctx, p) ((p) + NUM_PROBAS * ((ctx) + (b) * NUM_CTX)) - -static int RecordCoeffTokens(int ctx, const VP8Residual* const res, - VP8TBuffer* tokens) { - int n = res->first; - int b = VP8EncBands[n]; - if (!VP8AddToken(tokens, res->last >= 0, TOKEN_ID(b, ctx, 0))) { - return 0; - } - - while (n < 16) { - const int c = res->coeffs[n++]; - const int sign = c < 0; - int v = sign ? -c : c; - const int base_id = TOKEN_ID(b, ctx, 0); - if (!VP8AddToken(tokens, v != 0, base_id + 1)) { - b = VP8EncBands[n]; - ctx = 0; - continue; - } - if (!VP8AddToken(tokens, v > 1, base_id + 2)) { - b = VP8EncBands[n]; - ctx = 1; - } else { - if (!VP8AddToken(tokens, v > 4, base_id + 3)) { - if (VP8AddToken(tokens, v != 2, base_id + 4)) - VP8AddToken(tokens, v == 4, base_id + 5); - } else if (!VP8AddToken(tokens, v > 10, base_id + 6)) { - if (!VP8AddToken(tokens, v > 6, base_id + 7)) { -// VP8AddToken(tokens, v == 6, 159); - } else { -// VP8AddToken(tokens, v >= 9, 165); -// VP8AddToken(tokens, !(v & 1), 145); - } - } else { - int mask; - const uint8_t* tab; - if (v < 3 + (8 << 1)) { // kCat3 (3b) - VP8AddToken(tokens, 0, base_id + 8); - VP8AddToken(tokens, 0, base_id + 9); - v -= 3 + (8 << 0); - mask = 1 << 2; - tab = kCat3; - } else if (v < 3 + (8 << 2)) { // kCat4 (4b) - VP8AddToken(tokens, 0, base_id + 8); - VP8AddToken(tokens, 1, base_id + 9); - v -= 3 + (8 << 1); - mask = 1 << 3; - tab = kCat4; - } else if (v < 3 + (8 << 3)) { // kCat5 (5b) - VP8AddToken(tokens, 1, base_id + 8); - VP8AddToken(tokens, 0, base_id + 10); - v -= 3 + (8 << 2); - mask = 1 << 4; - tab = kCat5; - } else { // kCat6 (11b) - VP8AddToken(tokens, 1, base_id + 8); - VP8AddToken(tokens, 1, base_id + 10); - v -= 3 + (8 << 3); - mask = 1 << 10; - tab = kCat6; - } - while (mask) { - // VP8AddToken(tokens, !!(v & mask), *tab++); - mask >>= 1; - } - } - ctx = 2; - } - b = VP8EncBands[n]; - // VP8PutBitUniform(bw, sign); - if (n == 16 || !VP8AddToken(tokens, n <= res->last, TOKEN_ID(b, ctx, 0))) { - return 1; // EOB - } - } - return 1; -} +#if !defined(DISABLE_TOKEN_BUFFER) -static void RecordTokens(VP8EncIterator* const it, - const VP8ModeScore* const rd, VP8TBuffer tokens[2]) { +static int RecordTokens(VP8EncIterator* const it, const VP8ModeScore* const rd, + VP8TBuffer* const tokens) { int x, y, ch; VP8Residual res; VP8Encoder* const enc = it->enc_; VP8IteratorNzToBytes(it); if (it->mb_->type_ == 1) { // i16x16 - InitResidual(0, 1, enc, &res); - SetResidualCoeffs(rd->y_dc_levels, &res); -// TODO(skal): FIX -> it->top_nz_[8] = it->left_nz_[8] = - RecordCoeffTokens(it->top_nz_[8] + it->left_nz_[8], &res, &tokens[0]); - InitResidual(1, 0, enc, &res); + const int ctx = it->top_nz_[8] + it->left_nz_[8]; + VP8InitResidual(0, 1, enc, &res); + VP8SetResidualCoeffs(rd->y_dc_levels, &res); + it->top_nz_[8] = it->left_nz_[8] = + VP8RecordCoeffTokens(ctx, 1, + res.first, res.last, res.coeffs, tokens); + VP8RecordCoeffs(ctx, &res); + VP8InitResidual(1, 0, enc, &res); } else { - InitResidual(0, 3, enc, &res); + VP8InitResidual(0, 3, enc, &res); } // luma-AC for (y = 0; y < 4; ++y) { for (x = 0; x < 4; ++x) { const int ctx = it->top_nz_[x] + it->left_nz_[y]; - SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + VP8SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); it->top_nz_[x] = it->left_nz_[y] = - RecordCoeffTokens(ctx, &res, &tokens[0]); + VP8RecordCoeffTokens(ctx, res.coeff_type, + res.first, res.last, res.coeffs, tokens); + VP8RecordCoeffs(ctx, &res); } } // U/V - InitResidual(0, 2, enc, &res); + VP8InitResidual(0, 2, enc, &res); for (ch = 0; ch <= 2; ch += 2) { for (y = 0; y < 2; ++y) { for (x = 0; x < 2; ++x) { const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; - SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); + VP8SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = - RecordCoeffTokens(ctx, &res, &tokens[1]); + VP8RecordCoeffTokens(ctx, 2, + res.first, res.last, res.coeffs, tokens); + VP8RecordCoeffs(ctx, &res); } } } + VP8IteratorBytesToNz(it); + return !tokens->error_; } -#endif // USE_TOKEN_BUFFER +#endif // !DISABLE_TOKEN_BUFFER //------------------------------------------------------------------------------ // ExtraInfo map / Debug function @@ -697,7 +460,10 @@ static void SetBlock(uint8_t* p, int value, int size) { #endif static void ResetSSE(VP8Encoder* const enc) { - memset(enc->sse_, 0, sizeof(enc->sse_)); + enc->sse_[0] = 0; + enc->sse_[1] = 0; + enc->sse_[2] = 0; + // Note: enc->sse_[3] is managed by alpha.c enc->sse_count_ = 0; } @@ -706,9 +472,9 @@ static void StoreSSE(const VP8EncIterator* const it) { const uint8_t* const in = it->yuv_in_; const uint8_t* const out = it->yuv_out_; // Note: not totally accurate at boundary. And doesn't include in-loop filter. - enc->sse_[0] += VP8SSE16x16(in + Y_OFF, out + Y_OFF); - enc->sse_[1] += VP8SSE8x8(in + U_OFF, out + U_OFF); - enc->sse_[2] += VP8SSE8x8(in + V_OFF, out + V_OFF); + enc->sse_[0] += VP8SSE16x16(in + Y_OFF_ENC, out + Y_OFF_ENC); + enc->sse_[1] += VP8SSE8x8(in + U_OFF_ENC, out + U_OFF_ENC); + enc->sse_[2] += VP8SSE8x8(in + V_OFF_ENC, out + V_OFF_ENC); enc->sse_count_ += 16 * 16; } @@ -736,72 +502,163 @@ static void StoreSideInfo(const VP8EncIterator* const it) { const int b = (int)((it->luma_bits_ + it->uv_bits_ + 7) >> 3); *info = (b > 255) ? 255 : b; break; } + case 7: *info = mb->alpha_; break; default: *info = 0; break; - }; + } } #if SEGMENT_VISU // visualize segments and prediction modes - SetBlock(it->yuv_out_ + Y_OFF, mb->segment_ * 64, 16); - SetBlock(it->yuv_out_ + U_OFF, it->preds_[0] * 64, 8); - SetBlock(it->yuv_out_ + V_OFF, mb->uv_mode_ * 64, 8); + SetBlock(it->yuv_out_ + Y_OFF_ENC, mb->segment_ * 64, 16); + SetBlock(it->yuv_out_ + U_OFF_ENC, it->preds_[0] * 64, 8); + SetBlock(it->yuv_out_ + V_OFF_ENC, mb->uv_mode_ * 64, 8); #endif } -//------------------------------------------------------------------------------ -// Main loops -// -// VP8EncLoop(): does the final bitstream coding. - -static void ResetAfterSkip(VP8EncIterator* const it) { - if (it->mb_->type_ == 1) { - *it->nz_ = 0; // reset all predictors - it->left_nz_[8] = 0; - } else { - *it->nz_ &= (1 << 24); // preserve the dc_nz bit - } +static double GetPSNR(uint64_t mse, uint64_t size) { + return (mse > 0 && size > 0) ? 10. * log10(255. * 255. * size / mse) : 99; } -int VP8EncLoop(VP8Encoder* const enc) { - int i, s, p; - int ok = 1; - VP8EncIterator it; - VP8ModeScore info; - const int dont_use_skip = !enc->proba_.use_skip_proba_; - const int rd_opt = enc->rd_opt_level_; - const int kAverageBytesPerMB = 5; // TODO: have a kTable[quality/10] - const int bytes_per_parts = - enc->mb_w_ * enc->mb_h_ * kAverageBytesPerMB / enc->num_parts_; +//------------------------------------------------------------------------------ +// StatLoop(): only collect statistics (number of skips, token usage, ...). +// This is used for deciding optimal probabilities. It also modifies the +// quantizer value if some target (size, PSNR) was specified. - // Initialize the bit-writers - for (p = 0; p < enc->num_parts_; ++p) { - VP8BitWriterInit(enc->parts_ + p, bytes_per_parts); - } +static void SetLoopParams(VP8Encoder* const enc, float q) { + // Make sure the quality parameter is inside valid bounds + q = Clamp(q, 0.f, 100.f); + + VP8SetSegmentParams(enc, q); // setup segment quantizations and filters + SetSegmentProbas(enc); // compute segment probabilities ResetStats(enc); ResetSSE(enc); +} + +static uint64_t OneStatPass(VP8Encoder* const enc, VP8RDLevel rd_opt, + int nb_mbs, int percent_delta, + PassStats* const s) { + VP8EncIterator it; + uint64_t size = 0; + uint64_t size_p0 = 0; + uint64_t distortion = 0; + const uint64_t pixel_count = nb_mbs * 384; VP8IteratorInit(enc, &it); - VP8InitFilter(&it); + SetLoopParams(enc, s->q); do { - VP8IteratorImport(&it); - // Warning! order is important: first call VP8Decimate() and - // *then* decide how to code the skip decision if there's one. - if (!VP8Decimate(&it, &info, rd_opt) || dont_use_skip) { - CodeResiduals(it.bw_, &it, &info); - } else { // reset predictors after a skip - ResetAfterSkip(&it); + VP8ModeScore info; + VP8IteratorImport(&it, NULL); + if (VP8Decimate(&it, &info, rd_opt)) { + // Just record the number of skips and act like skip_proba is not used. + enc->proba_.nb_skip_++; } -#ifdef WEBP_EXPERIMENTAL_FEATURES - if (enc->use_layer_) { - VP8EncCodeLayerBlock(&it); + RecordResiduals(&it, &info); + size += info.R + info.H; + size_p0 += info.H; + distortion += info.D; + if (percent_delta && !VP8IteratorProgress(&it, percent_delta)) + return 0; + VP8IteratorSaveBoundary(&it); + } while (VP8IteratorNext(&it) && --nb_mbs > 0); + + size_p0 += enc->segment_hdr_.size_; + if (s->do_size_search) { + size += FinalizeSkipProba(enc); + size += FinalizeTokenProbas(&enc->proba_); + size = ((size + size_p0 + 1024) >> 11) + HEADER_SIZE_ESTIMATE; + s->value = (double)size; + } else { + s->value = GetPSNR(distortion, pixel_count); + } + return size_p0; +} + +static int StatLoop(VP8Encoder* const enc) { + const int method = enc->method_; + const int do_search = enc->do_search_; + const int fast_probe = ((method == 0 || method == 3) && !do_search); + int num_pass_left = enc->config_->pass; + const int task_percent = 20; + const int percent_per_pass = + (task_percent + num_pass_left / 2) / num_pass_left; + const int final_percent = enc->percent_ + task_percent; + const VP8RDLevel rd_opt = + (method >= 3 || do_search) ? RD_OPT_BASIC : RD_OPT_NONE; + int nb_mbs = enc->mb_w_ * enc->mb_h_; + PassStats stats; + + InitPassStats(enc, &stats); + ResetTokenStats(enc); + + // Fast mode: quick analysis pass over few mbs. Better than nothing. + if (fast_probe) { + if (method == 3) { // we need more stats for method 3 to be reliable. + nb_mbs = (nb_mbs > 200) ? nb_mbs >> 1 : 100; + } else { + nb_mbs = (nb_mbs > 200) ? nb_mbs >> 2 : 50; } + } + + while (num_pass_left-- > 0) { + const int is_last_pass = (fabs(stats.dq) <= DQ_LIMIT) || + (num_pass_left == 0) || + (enc->max_i4_header_bits_ == 0); + const uint64_t size_p0 = + OneStatPass(enc, rd_opt, nb_mbs, percent_per_pass, &stats); + if (size_p0 == 0) return 0; +#if (DEBUG_SEARCH > 0) + printf("#%d value:%.1lf -> %.1lf q:%.2f -> %.2f\n", + num_pass_left, stats.last_value, stats.value, stats.last_q, stats.q); #endif - StoreSideInfo(&it); - VP8StoreFilterStats(&it); - VP8IteratorExport(&it); - ok = VP8IteratorProgress(&it, 20); - } while (ok && VP8IteratorNext(&it, it.yuv_out_)); + if (enc->max_i4_header_bits_ > 0 && size_p0 > PARTITION0_SIZE_LIMIT) { + ++num_pass_left; + enc->max_i4_header_bits_ >>= 1; // strengthen header bit limitation... + continue; // ...and start over + } + if (is_last_pass) { + break; + } + // If no target size: just do several pass without changing 'q' + if (do_search) { + ComputeNextQ(&stats); + if (fabs(stats.dq) <= DQ_LIMIT) break; + } + } + if (!do_search || !stats.do_size_search) { + // Need to finalize probas now, since it wasn't done during the search. + FinalizeSkipProba(enc); + FinalizeTokenProbas(&enc->proba_); + } + VP8CalculateLevelCosts(&enc->proba_); // finalize costs + return WebPReportProgress(enc->pic_, final_percent, &enc->percent_); +} + +//------------------------------------------------------------------------------ +// Main loops +// + +static const int kAverageBytesPerMB[8] = { 50, 24, 16, 9, 7, 5, 3, 2 }; +static int PreLoopInitialize(VP8Encoder* const enc) { + int p; + int ok = 1; + const int average_bytes_per_MB = kAverageBytesPerMB[enc->base_quant_ >> 4]; + const int bytes_per_parts = + enc->mb_w_ * enc->mb_h_ * average_bytes_per_MB / enc->num_parts_; + // Initialize the bit-writers + for (p = 0; ok && p < enc->num_parts_; ++p) { + ok = VP8BitWriterInit(enc->parts_ + p, bytes_per_parts); + } + if (!ok) { + VP8EncFreeBitWriters(enc); // malloc error occurred + WebPEncodingSetError(enc->pic_, VP8_ENC_ERROR_OUT_OF_MEMORY); + } + return ok; +} + +static int PostLoopFinalize(VP8EncIterator* const it, int ok) { + VP8Encoder* const enc = it->enc_; if (ok) { // Finalize the partitions, check for extra errors. + int p; for (p = 0; p < enc->num_parts_; ++p) { VP8BitWriterFinish(enc->parts_ + p); ok &= !enc->parts_[p].error_; @@ -809,131 +666,185 @@ int VP8EncLoop(VP8Encoder* const enc) { } if (ok) { // All good. Finish up. - if (enc->pic_->stats) { // finalize byte counters... + if (enc->pic_->stats != NULL) { // finalize byte counters... + int i, s; for (i = 0; i <= 2; ++i) { for (s = 0; s < NUM_MB_SEGMENTS; ++s) { - enc->residual_bytes_[i][s] = (int)((it.bit_count_[s][i] + 7) >> 3); + enc->residual_bytes_[i][s] = (int)((it->bit_count_[s][i] + 7) >> 3); } } } - VP8AdjustFilterStrength(&it); // ...and store filter stats. + VP8AdjustFilterStrength(it); // ...and store filter stats. } else { // Something bad happened -> need to do some memory cleanup. VP8EncFreeBitWriters(enc); } - return ok; } //------------------------------------------------------------------------------ -// VP8StatLoop(): only collect statistics (number of skips, token usage, ...) -// This is used for deciding optimal probabilities. It also -// modifies the quantizer value if some target (size, PNSR) -// was specified. - -#define kHeaderSizeEstimate (15 + 20 + 10) // TODO: fix better - -static int OneStatPass(VP8Encoder* const enc, float q, int rd_opt, int nb_mbs, - float* const PSNR, int percent_delta) { - VP8EncIterator it; - uint64_t size = 0; - uint64_t distortion = 0; - const uint64_t pixel_count = nb_mbs * 384; +// VP8EncLoop(): does the final bitstream coding. - // Make sure the quality parameter is inside valid bounds - if (q < 0.) { - q = 0; - } else if (q > 100.) { - q = 100; +static void ResetAfterSkip(VP8EncIterator* const it) { + if (it->mb_->type_ == 1) { + *it->nz_ = 0; // reset all predictors + it->left_nz_[8] = 0; + } else { + *it->nz_ &= (1 << 24); // preserve the dc_nz bit } +} - VP8SetSegmentParams(enc, q); // setup segment quantizations and filters +int VP8EncLoop(VP8Encoder* const enc) { + VP8EncIterator it; + int ok = PreLoopInitialize(enc); + if (!ok) return 0; - ResetStats(enc); - ResetTokenStats(enc); + StatLoop(enc); // stats-collection loop VP8IteratorInit(enc, &it); + VP8InitFilter(&it); do { VP8ModeScore info; - VP8IteratorImport(&it); - if (VP8Decimate(&it, &info, rd_opt)) { - // Just record the number of skips and act like skip_proba is not used. - enc->proba_.nb_skip_++; + const int dont_use_skip = !enc->proba_.use_skip_proba_; + const VP8RDLevel rd_opt = enc->rd_opt_level_; + + VP8IteratorImport(&it, NULL); + // Warning! order is important: first call VP8Decimate() and + // *then* decide how to code the skip decision if there's one. + if (!VP8Decimate(&it, &info, rd_opt) || dont_use_skip) { + CodeResiduals(it.bw_, &it, &info); + } else { // reset predictors after a skip + ResetAfterSkip(&it); } - RecordResiduals(&it, &info); - size += info.R; - distortion += info.D; - if (percent_delta && !VP8IteratorProgress(&it, percent_delta)) - return 0; - } while (VP8IteratorNext(&it, it.yuv_out_) && --nb_mbs > 0); - size += FinalizeSkipProba(enc); - size += FinalizeTokenProbas(enc); - size += enc->segment_hdr_.size_; - size = ((size + 1024) >> 11) + kHeaderSizeEstimate; - - if (PSNR) { - *PSNR = (float)(10.* log10(255. * 255. * pixel_count / distortion)); - } - return (int)size; + StoreSideInfo(&it); + VP8StoreFilterStats(&it); + VP8IteratorExport(&it); + ok = VP8IteratorProgress(&it, 20); + VP8IteratorSaveBoundary(&it); + } while (ok && VP8IteratorNext(&it)); + + return PostLoopFinalize(&it, ok); } -// successive refinement increments. -static const int dqs[] = { 20, 15, 10, 8, 6, 4, 2, 1, 0 }; +//------------------------------------------------------------------------------ +// Single pass using Token Buffer. -int VP8StatLoop(VP8Encoder* const enc) { - const int do_search = - (enc->config_->target_size > 0 || enc->config_->target_PSNR > 0); - const int fast_probe = (enc->method_ < 2 && !do_search); - float q = enc->config_->quality; - const int max_passes = enc->config_->pass; - const int task_percent = 20; - const int percent_per_pass = (task_percent + max_passes / 2) / max_passes; - const int final_percent = enc->percent_ + task_percent; - int pass; - int nb_mbs; +#if !defined(DISABLE_TOKEN_BUFFER) - // Fast mode: quick analysis pass over few mbs. Better than nothing. - nb_mbs = enc->mb_w_ * enc->mb_h_; - if (fast_probe && nb_mbs > 100) nb_mbs = 100; - - // No target size: just do several pass without changing 'q' - if (!do_search) { - for (pass = 0; pass < max_passes; ++pass) { - const int rd_opt = (enc->method_ > 2); - if (!OneStatPass(enc, q, rd_opt, nb_mbs, NULL, percent_per_pass)) { - return 0; - } +#define MIN_COUNT 96 // minimum number of macroblocks before updating stats + +int VP8EncTokenLoop(VP8Encoder* const enc) { + // Roughly refresh the proba eight times per pass + int max_count = (enc->mb_w_ * enc->mb_h_) >> 3; + int num_pass_left = enc->config_->pass; + const int do_search = enc->do_search_; + VP8EncIterator it; + VP8EncProba* const proba = &enc->proba_; + const VP8RDLevel rd_opt = enc->rd_opt_level_; + const uint64_t pixel_count = enc->mb_w_ * enc->mb_h_ * 384; + PassStats stats; + int ok; + + InitPassStats(enc, &stats); + ok = PreLoopInitialize(enc); + if (!ok) return 0; + + if (max_count < MIN_COUNT) max_count = MIN_COUNT; + + assert(enc->num_parts_ == 1); + assert(enc->use_tokens_); + assert(proba->use_skip_proba_ == 0); + assert(rd_opt >= RD_OPT_BASIC); // otherwise, token-buffer won't be useful + assert(num_pass_left > 0); + + while (ok && num_pass_left-- > 0) { + const int is_last_pass = (fabs(stats.dq) <= DQ_LIMIT) || + (num_pass_left == 0) || + (enc->max_i4_header_bits_ == 0); + uint64_t size_p0 = 0; + uint64_t distortion = 0; + int cnt = max_count; + VP8IteratorInit(enc, &it); + SetLoopParams(enc, stats.q); + if (is_last_pass) { + ResetTokenStats(enc); + VP8InitFilter(&it); // don't collect stats until last pass (too costly) } - } else { - // binary search for a size close to target - for (pass = 0; pass < max_passes && (dqs[pass] > 0); ++pass) { - const int rd_opt = 1; - float PSNR; - int criterion; - const int size = OneStatPass(enc, q, rd_opt, nb_mbs, &PSNR, - percent_per_pass); -#if DEBUG_SEARCH - printf("#%d size=%d PSNR=%.2f q=%.2f\n", pass, size, PSNR, q); -#endif - if (!size) return 0; - if (enc->config_->target_PSNR > 0) { - criterion = (PSNR < enc->config_->target_PSNR); - } else { - criterion = (size < enc->config_->target_size); + VP8TBufferClear(&enc->tokens_); + do { + VP8ModeScore info; + VP8IteratorImport(&it, NULL); + if (--cnt < 0) { + FinalizeTokenProbas(proba); + VP8CalculateLevelCosts(proba); // refresh cost tables for rd-opt + cnt = max_count; } - // dichotomize - if (criterion) { - q += dqs[pass]; - } else { - q -= dqs[pass]; + VP8Decimate(&it, &info, rd_opt); + ok = RecordTokens(&it, &info, &enc->tokens_); + if (!ok) { + WebPEncodingSetError(enc->pic_, VP8_ENC_ERROR_OUT_OF_MEMORY); + break; + } + size_p0 += info.H; + distortion += info.D; + if (is_last_pass) { + StoreSideInfo(&it); + VP8StoreFilterStats(&it); + VP8IteratorExport(&it); + ok = VP8IteratorProgress(&it, 20); } + VP8IteratorSaveBoundary(&it); + } while (ok && VP8IteratorNext(&it)); + if (!ok) break; + + size_p0 += enc->segment_hdr_.size_; + if (stats.do_size_search) { + uint64_t size = FinalizeTokenProbas(&enc->proba_); + size += VP8EstimateTokenSize(&enc->tokens_, + (const uint8_t*)proba->coeffs_); + size = (size + size_p0 + 1024) >> 11; // -> size in bytes + size += HEADER_SIZE_ESTIMATE; + stats.value = (double)size; + } else { // compute and store PSNR + stats.value = GetPSNR(distortion, pixel_count); + } + +#if (DEBUG_SEARCH > 0) + printf("#%2d metric:%.1lf -> %.1lf last_q=%.2lf q=%.2lf dq=%.2lf\n", + num_pass_left, stats.last_value, stats.value, + stats.last_q, stats.q, stats.dq); +#endif + if (size_p0 > PARTITION0_SIZE_LIMIT) { + ++num_pass_left; + enc->max_i4_header_bits_ >>= 1; // strengthen header bit limitation... + continue; // ...and start over + } + if (is_last_pass) { + break; // done + } + if (do_search) { + ComputeNextQ(&stats); // Adjust q } } - return WebPReportProgress(enc->pic_, final_percent, &enc->percent_); + if (ok) { + if (!stats.do_size_search) { + FinalizeTokenProbas(&enc->proba_); + } + ok = VP8EmitTokens(&enc->tokens_, enc->parts_ + 0, + (const uint8_t*)proba->coeffs_, 1); + } + ok = ok && WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_); + return PostLoopFinalize(&it, ok); +} + +#else + +int VP8EncTokenLoop(VP8Encoder* const enc) { + (void)enc; + return 0; // we shouldn't be here. } +#endif // DISABLE_TOKEN_BUFFER + //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/enc/histogram.c b/drivers/webp/enc/histogram.c index ca838e064d..62c320d809 100644 --- a/drivers/webp/enc/histogram.c +++ b/drivers/webp/enc/histogram.c @@ -1,38 +1,82 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Author: Jyrki Alakuijala (jyrki@google.com) // #ifdef HAVE_CONFIG_H -#include "config.h" +#include "../webp/config.h" #endif #include <math.h> -#include <stdio.h> #include "./backward_references.h" #include "./histogram.h" #include "../dsp/lossless.h" #include "../utils/utils.h" +#define MAX_COST 1.e38 + +// Number of partitions for the three dominant (literal, red and blue) symbol +// costs. +#define NUM_PARTITIONS 4 +// The size of the bin-hash corresponding to the three dominant costs. +#define BIN_SIZE (NUM_PARTITIONS * NUM_PARTITIONS * NUM_PARTITIONS) +// Maximum number of histograms allowed in greedy combining algorithm. +#define MAX_HISTO_GREEDY 100 + static void HistogramClear(VP8LHistogram* const p) { - memset(p->literal_, 0, sizeof(p->literal_)); - memset(p->red_, 0, sizeof(p->red_)); - memset(p->blue_, 0, sizeof(p->blue_)); - memset(p->alpha_, 0, sizeof(p->alpha_)); - memset(p->distance_, 0, sizeof(p->distance_)); - p->bit_cost_ = 0; + uint32_t* const literal = p->literal_; + const int cache_bits = p->palette_code_bits_; + const int histo_size = VP8LGetHistogramSize(cache_bits); + memset(p, 0, histo_size); + p->palette_code_bits_ = cache_bits; + p->literal_ = literal; +} + +// Swap two histogram pointers. +static void HistogramSwap(VP8LHistogram** const A, VP8LHistogram** const B) { + VP8LHistogram* const tmp = *A; + *A = *B; + *B = tmp; +} + +static void HistogramCopy(const VP8LHistogram* const src, + VP8LHistogram* const dst) { + uint32_t* const dst_literal = dst->literal_; + const int dst_cache_bits = dst->palette_code_bits_; + const int histo_size = VP8LGetHistogramSize(dst_cache_bits); + assert(src->palette_code_bits_ == dst_cache_bits); + memcpy(dst, src, histo_size); + dst->literal_ = dst_literal; +} + +int VP8LGetHistogramSize(int cache_bits) { + const int literal_size = VP8LHistogramNumCodes(cache_bits); + const size_t total_size = sizeof(VP8LHistogram) + sizeof(int) * literal_size; + assert(total_size <= (size_t)0x7fffffff); + return (int)total_size; +} + +void VP8LFreeHistogram(VP8LHistogram* const histo) { + WebPSafeFree(histo); +} + +void VP8LFreeHistogramSet(VP8LHistogramSet* const histo) { + WebPSafeFree(histo); } void VP8LHistogramStoreRefs(const VP8LBackwardRefs* const refs, VP8LHistogram* const histo) { - int i; - for (i = 0; i < refs->size; ++i) { - VP8LHistogramAddSinglePixOrCopy(histo, &refs->refs[i]); + VP8LRefsCursor c = VP8LRefsCursorInit(refs); + while (VP8LRefsCursorOk(&c)) { + VP8LHistogramAddSinglePixOrCopy(histo, c.cur_pos); + VP8LRefsCursorNext(&c); } } @@ -51,13 +95,25 @@ void VP8LHistogramInit(VP8LHistogram* const p, int palette_code_bits) { HistogramClear(p); } +VP8LHistogram* VP8LAllocateHistogram(int cache_bits) { + VP8LHistogram* histo = NULL; + const int total_size = VP8LGetHistogramSize(cache_bits); + uint8_t* const memory = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*memory)); + if (memory == NULL) return NULL; + histo = (VP8LHistogram*)memory; + // literal_ won't necessary be aligned. + histo->literal_ = (uint32_t*)(memory + sizeof(VP8LHistogram)); + VP8LHistogramInit(histo, cache_bits); + return histo; +} + VP8LHistogramSet* VP8LAllocateHistogramSet(int size, int cache_bits) { int i; VP8LHistogramSet* set; - VP8LHistogram* bulk; - const uint64_t total_size = (uint64_t)sizeof(*set) - + size * sizeof(*set->histograms) - + size * sizeof(**set->histograms); + const int histo_size = VP8LGetHistogramSize(cache_bits); + const size_t total_size = + sizeof(*set) + size * (sizeof(*set->histograms) + + histo_size + WEBP_ALIGN_CST); uint8_t* memory = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*memory)); if (memory == NULL) return NULL; @@ -65,12 +121,15 @@ VP8LHistogramSet* VP8LAllocateHistogramSet(int size, int cache_bits) { memory += sizeof(*set); set->histograms = (VP8LHistogram**)memory; memory += size * sizeof(*set->histograms); - bulk = (VP8LHistogram*)memory; set->max_size = size; set->size = size; for (i = 0; i < size; ++i) { - set->histograms[i] = bulk + i; + memory = (uint8_t*)WEBP_ALIGN(memory); + set->histograms[i] = (VP8LHistogram*)memory; + // literal_ won't necessary be aligned. + set->histograms[i]->literal_ = (uint32_t*)(memory + sizeof(VP8LHistogram)); VP8LHistogramInit(set->histograms[i], cache_bits); + memory += histo_size; } return set; } @@ -85,151 +144,183 @@ void VP8LHistogramAddSinglePixOrCopy(VP8LHistogram* const histo, ++histo->literal_[PixOrCopyLiteral(v, 1)]; ++histo->blue_[PixOrCopyLiteral(v, 0)]; } else if (PixOrCopyIsCacheIdx(v)) { - int literal_ix = 256 + NUM_LENGTH_CODES + PixOrCopyCacheIdx(v); + const int literal_ix = + NUM_LITERAL_CODES + NUM_LENGTH_CODES + PixOrCopyCacheIdx(v); ++histo->literal_[literal_ix]; } else { - int code, extra_bits_count, extra_bits_value; - PrefixEncode(PixOrCopyLength(v), - &code, &extra_bits_count, &extra_bits_value); - ++histo->literal_[256 + code]; - PrefixEncode(PixOrCopyDistance(v), - &code, &extra_bits_count, &extra_bits_value); + int code, extra_bits; + VP8LPrefixEncodeBits(PixOrCopyLength(v), &code, &extra_bits); + ++histo->literal_[NUM_LITERAL_CODES + code]; + VP8LPrefixEncodeBits(PixOrCopyDistance(v), &code, &extra_bits); ++histo->distance_[code]; } } +// ----------------------------------------------------------------------------- +// Various histogram combine/cost-eval functions + +static int GetCombinedHistogramEntropy(const VP8LHistogram* const a, + const VP8LHistogram* const b, + double cost_threshold, + double* cost) { + const int palette_code_bits = a->palette_code_bits_; + assert(a->palette_code_bits_ == b->palette_code_bits_); + *cost += VP8LGetCombinedEntropy(a->literal_, b->literal_, + VP8LHistogramNumCodes(palette_code_bits)); + *cost += VP8LExtraCostCombined(a->literal_ + NUM_LITERAL_CODES, + b->literal_ + NUM_LITERAL_CODES, + NUM_LENGTH_CODES); + if (*cost > cost_threshold) return 0; + + *cost += VP8LGetCombinedEntropy(a->red_, b->red_, NUM_LITERAL_CODES); + if (*cost > cost_threshold) return 0; + + *cost += VP8LGetCombinedEntropy(a->blue_, b->blue_, NUM_LITERAL_CODES); + if (*cost > cost_threshold) return 0; + + *cost += VP8LGetCombinedEntropy(a->alpha_, b->alpha_, NUM_LITERAL_CODES); + if (*cost > cost_threshold) return 0; + + *cost += VP8LGetCombinedEntropy(a->distance_, b->distance_, + NUM_DISTANCE_CODES); + *cost += VP8LExtraCostCombined(a->distance_, b->distance_, + NUM_DISTANCE_CODES); + if (*cost > cost_threshold) return 0; + + return 1; +} - -static double BitsEntropy(const int* const array, int n) { - double retval = 0.; - int sum = 0; - int nonzeros = 0; - int max_val = 0; - int i; - double mix; - for (i = 0; i < n; ++i) { - if (array[i] != 0) { - sum += array[i]; - ++nonzeros; - retval -= VP8LFastSLog2(array[i]); - if (max_val < array[i]) { - max_val = array[i]; - } - } +// Performs out = a + b, computing the cost C(a+b) - C(a) - C(b) while comparing +// to the threshold value 'cost_threshold'. The score returned is +// Score = C(a+b) - C(a) - C(b), where C(a) + C(b) is known and fixed. +// Since the previous score passed is 'cost_threshold', we only need to compare +// the partial cost against 'cost_threshold + C(a) + C(b)' to possibly bail-out +// early. +static double HistogramAddEval(const VP8LHistogram* const a, + const VP8LHistogram* const b, + VP8LHistogram* const out, + double cost_threshold) { + double cost = 0; + const double sum_cost = a->bit_cost_ + b->bit_cost_; + cost_threshold += sum_cost; + + if (GetCombinedHistogramEntropy(a, b, cost_threshold, &cost)) { + VP8LHistogramAdd(a, b, out); + out->bit_cost_ = cost; + out->palette_code_bits_ = a->palette_code_bits_; + out->trivial_symbol_ = (a->trivial_symbol_ == b->trivial_symbol_) ? + a->trivial_symbol_ : VP8L_NON_TRIVIAL_SYM; } - retval += VP8LFastSLog2(sum); - if (nonzeros < 5) { - if (nonzeros <= 1) { - return 0; - } - // Two symbols, they will be 0 and 1 in a Huffman code. - // Let's mix in a bit of entropy to favor good clustering when - // distributions of these are combined. - if (nonzeros == 2) { - return 0.99 * sum + 0.01 * retval; - } - // No matter what the entropy says, we cannot be better than min_limit - // with Huffman coding. I am mixing a bit of entropy into the - // min_limit since it produces much better (~0.5 %) compression results - // perhaps because of better entropy clustering. - if (nonzeros == 3) { - mix = 0.95; - } else { - mix = 0.7; // nonzeros == 4. - } - } else { - mix = 0.627; - } + return cost - sum_cost; +} - { - double min_limit = 2 * sum - max_val; - min_limit = mix * min_limit + (1.0 - mix) * retval; - return (retval < min_limit) ? min_limit : retval; - } +// Same as HistogramAddEval(), except that the resulting histogram +// is not stored. Only the cost C(a+b) - C(a) is evaluated. We omit +// the term C(b) which is constant over all the evaluations. +static double HistogramAddThresh(const VP8LHistogram* const a, + const VP8LHistogram* const b, + double cost_threshold) { + double cost = -a->bit_cost_; + GetCombinedHistogramEntropy(a, b, cost_threshold, &cost); + return cost; } -double VP8LHistogramEstimateBitsBulk(const VP8LHistogram* const p) { - double retval = BitsEntropy(&p->literal_[0], VP8LHistogramNumCodes(p)) - + BitsEntropy(&p->red_[0], 256) - + BitsEntropy(&p->blue_[0], 256) - + BitsEntropy(&p->alpha_[0], 256) - + BitsEntropy(&p->distance_[0], NUM_DISTANCE_CODES); - // Compute the extra bits cost. - int i; - for (i = 2; i < NUM_LENGTH_CODES - 2; ++i) { - retval += - (i >> 1) * p->literal_[256 + i + 2]; - } - for (i = 2; i < NUM_DISTANCE_CODES - 2; ++i) { - retval += (i >> 1) * p->distance_[i + 2]; - } - return retval; -} - - -// Returns the cost encode the rle-encoded entropy code. -// The constants in this function are experimental. -static double HuffmanCost(const int* const population, int length) { - // Small bias because Huffman code length is typically not stored in - // full length. - static const int kHuffmanCodeOfHuffmanCodeSize = CODE_LENGTH_CODES * 3; - static const double kSmallBias = 9.1; - double retval = kHuffmanCodeOfHuffmanCodeSize - kSmallBias; - int streak = 0; - int i = 0; - for (; i < length - 1; ++i) { - ++streak; - if (population[i] == population[i + 1]) { - continue; - } - last_streak_hack: - // population[i] points now to the symbol in the streak of same values. - if (streak > 3) { - if (population[i] == 0) { - retval += 1.5625 + 0.234375 * streak; - } else { - retval += 2.578125 + 0.703125 * streak; - } - } else { - if (population[i] == 0) { - retval += 1.796875 * streak; - } else { - retval += 3.28125 * streak; - } - } - streak = 0; - } - if (i == length - 1) { - ++streak; - goto last_streak_hack; +// ----------------------------------------------------------------------------- + +// The structure to keep track of cost range for the three dominant entropy +// symbols. +// TODO(skal): Evaluate if float can be used here instead of double for +// representing the entropy costs. +typedef struct { + double literal_max_; + double literal_min_; + double red_max_; + double red_min_; + double blue_max_; + double blue_min_; +} DominantCostRange; + +static void DominantCostRangeInit(DominantCostRange* const c) { + c->literal_max_ = 0.; + c->literal_min_ = MAX_COST; + c->red_max_ = 0.; + c->red_min_ = MAX_COST; + c->blue_max_ = 0.; + c->blue_min_ = MAX_COST; +} + +static void UpdateDominantCostRange( + const VP8LHistogram* const h, DominantCostRange* const c) { + if (c->literal_max_ < h->literal_cost_) c->literal_max_ = h->literal_cost_; + if (c->literal_min_ > h->literal_cost_) c->literal_min_ = h->literal_cost_; + if (c->red_max_ < h->red_cost_) c->red_max_ = h->red_cost_; + if (c->red_min_ > h->red_cost_) c->red_min_ = h->red_cost_; + if (c->blue_max_ < h->blue_cost_) c->blue_max_ = h->blue_cost_; + if (c->blue_min_ > h->blue_cost_) c->blue_min_ = h->blue_cost_; +} + +static void UpdateHistogramCost(VP8LHistogram* const h) { + uint32_t alpha_sym, red_sym, blue_sym; + const double alpha_cost = VP8LPopulationCost(h->alpha_, NUM_LITERAL_CODES, + &alpha_sym); + const double distance_cost = + VP8LPopulationCost(h->distance_, NUM_DISTANCE_CODES, NULL) + + VP8LExtraCost(h->distance_, NUM_DISTANCE_CODES); + const int num_codes = VP8LHistogramNumCodes(h->palette_code_bits_); + h->literal_cost_ = VP8LPopulationCost(h->literal_, num_codes, NULL) + + VP8LExtraCost(h->literal_ + NUM_LITERAL_CODES, + NUM_LENGTH_CODES); + h->red_cost_ = VP8LPopulationCost(h->red_, NUM_LITERAL_CODES, &red_sym); + h->blue_cost_ = VP8LPopulationCost(h->blue_, NUM_LITERAL_CODES, &blue_sym); + h->bit_cost_ = h->literal_cost_ + h->red_cost_ + h->blue_cost_ + + alpha_cost + distance_cost; + if ((alpha_sym | red_sym | blue_sym) == VP8L_NON_TRIVIAL_SYM) { + h->trivial_symbol_ = VP8L_NON_TRIVIAL_SYM; + } else { + h->trivial_symbol_ = + ((uint32_t)alpha_sym << 24) | (red_sym << 16) | (blue_sym << 0); } - return retval; } -// Estimates the Huffman dictionary + other block overhead size. -static double HistogramEstimateBitsHeader(const VP8LHistogram* const p) { - return HuffmanCost(&p->alpha_[0], 256) + - HuffmanCost(&p->red_[0], 256) + - HuffmanCost(&p->literal_[0], VP8LHistogramNumCodes(p)) + - HuffmanCost(&p->blue_[0], 256) + - HuffmanCost(&p->distance_[0], NUM_DISTANCE_CODES); +static int GetBinIdForEntropy(double min, double max, double val) { + const double range = max - min + 1e-6; + const double delta = val - min; + return (int)(NUM_PARTITIONS * delta / range); } -double VP8LHistogramEstimateBits(const VP8LHistogram* const p) { - return HistogramEstimateBitsHeader(p) + VP8LHistogramEstimateBitsBulk(p); +static int GetHistoBinIndexLowEffort( + const VP8LHistogram* const h, const DominantCostRange* const c) { + const int bin_id = GetBinIdForEntropy(c->literal_min_, c->literal_max_, + h->literal_cost_); + assert(bin_id < NUM_PARTITIONS); + return bin_id; } -static void HistogramBuildImage(int xsize, int histo_bits, - const VP8LBackwardRefs* const backward_refs, - VP8LHistogramSet* const image) { - int i; +static int GetHistoBinIndex( + const VP8LHistogram* const h, const DominantCostRange* const c) { + const int bin_id = + GetBinIdForEntropy(c->blue_min_, c->blue_max_, h->blue_cost_) + + NUM_PARTITIONS * GetBinIdForEntropy(c->red_min_, c->red_max_, + h->red_cost_) + + NUM_PARTITIONS * NUM_PARTITIONS * GetBinIdForEntropy(c->literal_min_, + c->literal_max_, + h->literal_cost_); + assert(bin_id < BIN_SIZE); + return bin_id; +} + +// Construct the histograms from backward references. +static void HistogramBuild( + int xsize, int histo_bits, const VP8LBackwardRefs* const backward_refs, + VP8LHistogramSet* const image_histo) { int x = 0, y = 0; const int histo_xsize = VP8LSubSampleSize(xsize, histo_bits); - VP8LHistogram** const histograms = image->histograms; + VP8LHistogram** const histograms = image_histo->histograms; + VP8LRefsCursor c = VP8LRefsCursorInit(backward_refs); assert(histo_bits > 0); - for (i = 0; i < backward_refs->size; ++i) { - const PixOrCopy* const v = &backward_refs->refs[i]; + while (VP8LRefsCursorOk(&c)) { + const PixOrCopy* const v = c.cur_pos; const int ix = (y >> histo_bits) * histo_xsize + (x >> histo_bits); VP8LHistogramAddSinglePixOrCopy(histograms[ix], v); x += PixOrCopyLength(v); @@ -237,7 +328,134 @@ static void HistogramBuildImage(int xsize, int histo_bits, x -= xsize; ++y; } + VP8LRefsCursorNext(&c); + } +} + +// Copies the histograms and computes its bit_cost. +static void HistogramCopyAndAnalyze( + VP8LHistogramSet* const orig_histo, VP8LHistogramSet* const image_histo) { + int i; + const int histo_size = orig_histo->size; + VP8LHistogram** const orig_histograms = orig_histo->histograms; + VP8LHistogram** const histograms = image_histo->histograms; + for (i = 0; i < histo_size; ++i) { + VP8LHistogram* const histo = orig_histograms[i]; + UpdateHistogramCost(histo); + // Copy histograms from orig_histo[] to image_histo[]. + HistogramCopy(histo, histograms[i]); + } +} + +// Partition histograms to different entropy bins for three dominant (literal, +// red and blue) symbol costs and compute the histogram aggregate bit_cost. +static void HistogramAnalyzeEntropyBin(VP8LHistogramSet* const image_histo, + int16_t* const bin_map, int low_effort) { + int i; + VP8LHistogram** const histograms = image_histo->histograms; + const int histo_size = image_histo->size; + const int bin_depth = histo_size + 1; + DominantCostRange cost_range; + DominantCostRangeInit(&cost_range); + + // Analyze the dominant (literal, red and blue) entropy costs. + for (i = 0; i < histo_size; ++i) { + VP8LHistogram* const histo = histograms[i]; + UpdateDominantCostRange(histo, &cost_range); + } + + // bin-hash histograms on three of the dominant (literal, red and blue) + // symbol costs. + for (i = 0; i < histo_size; ++i) { + int num_histos; + VP8LHistogram* const histo = histograms[i]; + const int16_t bin_id = low_effort ? + (int16_t)GetHistoBinIndexLowEffort(histo, &cost_range) : + (int16_t)GetHistoBinIndex(histo, &cost_range); + const int bin_offset = bin_id * bin_depth; + // bin_map[n][0] for every bin 'n' maintains the counter for the number of + // histograms in that bin. + // Get and increment the num_histos in that bin. + num_histos = ++bin_map[bin_offset]; + assert(bin_offset + num_histos < bin_depth * BIN_SIZE); + // Add histogram i'th index at num_histos (last) position in the bin_map. + bin_map[bin_offset + num_histos] = i; + } +} + +// Compact the histogram set by removing unused entries. +static void HistogramCompactBins(VP8LHistogramSet* const image_histo) { + VP8LHistogram** const histograms = image_histo->histograms; + int i, j; + + for (i = 0, j = 0; i < image_histo->size; ++i) { + if (histograms[i] != NULL && histograms[i]->bit_cost_ != 0.) { + if (j < i) { + histograms[j] = histograms[i]; + histograms[i] = NULL; + } + ++j; + } } + image_histo->size = j; +} + +static VP8LHistogram* HistogramCombineEntropyBin( + VP8LHistogramSet* const image_histo, + VP8LHistogram* cur_combo, + int16_t* const bin_map, int bin_depth, int num_bins, + double combine_cost_factor, int low_effort) { + int bin_id; + VP8LHistogram** const histograms = image_histo->histograms; + + for (bin_id = 0; bin_id < num_bins; ++bin_id) { + const int bin_offset = bin_id * bin_depth; + const int num_histos = bin_map[bin_offset]; + const int idx1 = bin_map[bin_offset + 1]; + int num_combine_failures = 0; + int n; + for (n = 2; n <= num_histos; ++n) { + const int idx2 = bin_map[bin_offset + n]; + if (low_effort) { + // Merge all histograms with the same bin index, irrespective of cost of + // the merged histograms. + VP8LHistogramAdd(histograms[idx1], histograms[idx2], histograms[idx1]); + histograms[idx2]->bit_cost_ = 0.; + } else { + const double bit_cost_idx2 = histograms[idx2]->bit_cost_; + if (bit_cost_idx2 > 0.) { + const double bit_cost_thresh = -bit_cost_idx2 * combine_cost_factor; + const double curr_cost_diff = + HistogramAddEval(histograms[idx1], histograms[idx2], + cur_combo, bit_cost_thresh); + if (curr_cost_diff < bit_cost_thresh) { + // Try to merge two histograms only if the combo is a trivial one or + // the two candidate histograms are already non-trivial. + // For some images, 'try_combine' turns out to be false for a lot of + // histogram pairs. In that case, we fallback to combining + // histograms as usual to avoid increasing the header size. + const int try_combine = + (cur_combo->trivial_symbol_ != VP8L_NON_TRIVIAL_SYM) || + ((histograms[idx1]->trivial_symbol_ == VP8L_NON_TRIVIAL_SYM) && + (histograms[idx2]->trivial_symbol_ == VP8L_NON_TRIVIAL_SYM)); + const int max_combine_failures = 32; + if (try_combine || (num_combine_failures >= max_combine_failures)) { + HistogramSwap(&cur_combo, &histograms[idx1]); + histograms[idx2]->bit_cost_ = 0.; + } else { + ++num_combine_failures; + } + } + } + } + } + if (low_effort) { + // Update the bit_cost for the merged histograms (per bin index). + UpdateHistogramCost(histograms[idx1]); + } + } + HistogramCompactBins(image_histo); + return cur_combo; } static uint32_t MyRand(uint32_t *seed) { @@ -248,159 +466,433 @@ static uint32_t MyRand(uint32_t *seed) { return *seed; } -static int HistogramCombine(const VP8LHistogramSet* const in, - VP8LHistogramSet* const out, int num_pairs) { +// ----------------------------------------------------------------------------- +// Histogram pairs priority queue + +// Pair of histograms. Negative idx1 value means that pair is out-of-date. +typedef struct { + int idx1; + int idx2; + double cost_diff; + double cost_combo; +} HistogramPair; + +typedef struct { + HistogramPair* heap; + int* positions; + int size; + int max_index; +} HistoHeap; + +static int HistoHeapInit(HistoHeap* const histo_heap, const int max_index) { + histo_heap->size = 0; + histo_heap->max_index = max_index; + histo_heap->heap = WebPSafeMalloc(max_index * max_index, + sizeof(*histo_heap->heap)); + histo_heap->positions = WebPSafeMalloc(max_index * max_index, + sizeof(*histo_heap->positions)); + return histo_heap->heap != NULL && histo_heap->positions != NULL; +} + +static void HistoHeapClear(HistoHeap* const histo_heap) { + assert(histo_heap != NULL); + WebPSafeFree(histo_heap->heap); + WebPSafeFree(histo_heap->positions); +} + +static void SwapHistogramPairs(HistogramPair *p1, + HistogramPair *p2) { + const HistogramPair tmp = *p1; + *p1 = *p2; + *p2 = tmp; +} + +// Given a valid min-heap in range [0, heap_size-1) this function places value +// heap[heap_size-1] into right location within heap and sets its position in +// positions array. +static void HeapPush(HistoHeap* const histo_heap) { + HistogramPair* const heap = histo_heap->heap - 1; + int* const positions = histo_heap->positions; + const int max_index = histo_heap->max_index; + int v; + ++histo_heap->size; + v = histo_heap->size; + while (v > 1 && heap[v].cost_diff < heap[v >> 1].cost_diff) { + SwapHistogramPairs(&heap[v], &heap[v >> 1]); + // Change position of moved pair in heap. + if (heap[v].idx1 >= 0) { + const int pos = heap[v].idx1 * max_index + heap[v].idx2; + assert(pos >= 0 && pos < max_index * max_index); + positions[pos] = v; + } + v >>= 1; + } + positions[heap[v].idx1 * max_index + heap[v].idx2] = v; +} + +// Given a valid min-heap in range [0, heap_size) this function shortens heap +// range by one and places element with the lowest value to (heap_size-1). +static void HeapPop(HistoHeap* const histo_heap) { + HistogramPair* const heap = histo_heap->heap - 1; + int* const positions = histo_heap->positions; + const int heap_size = histo_heap->size; + const int max_index = histo_heap->max_index; + int v = 1; + if (heap[v].idx1 >= 0) { + positions[heap[v].idx1 * max_index + heap[v].idx2] = -1; + } + SwapHistogramPairs(&heap[v], &heap[heap_size]); + while ((v << 1) < heap_size) { + int son = (heap[v << 1].cost_diff < heap[v].cost_diff) ? (v << 1) : v; + if (((v << 1) + 1) < heap_size && + heap[(v << 1) + 1].cost_diff < heap[son].cost_diff) { + son = (v << 1) + 1; + } + if (son == v) break; + SwapHistogramPairs(&heap[v], &heap[son]); + // Change position of moved pair in heap. + if (heap[v].idx1 >= 0) { + positions[heap[v].idx1 * max_index + heap[v].idx2] = v; + } + v = son; + } + if (heap[v].idx1 >= 0) { + positions[heap[v].idx1 * max_index + heap[v].idx2] = v; + } + --histo_heap->size; +} + +// ----------------------------------------------------------------------------- + +static void PreparePair(VP8LHistogram** histograms, int idx1, int idx2, + HistogramPair* const pair, + VP8LHistogram* const histos) { + if (idx1 > idx2) { + const int tmp = idx2; + idx2 = idx1; + idx1 = tmp; + } + pair->idx1 = idx1; + pair->idx2 = idx2; + pair->cost_diff = + HistogramAddEval(histograms[idx1], histograms[idx2], histos, 0); + pair->cost_combo = histos->bit_cost_; +} + +#define POSITION_INVALID (-1) + +// Invalidates pairs intersecting (idx1, idx2) in heap. +static void InvalidatePairs(int idx1, int idx2, + const HistoHeap* const histo_heap) { + HistogramPair* const heap = histo_heap->heap - 1; + int* const positions = histo_heap->positions; + const int max_index = histo_heap->max_index; + int i; + for (i = 0; i < idx1; ++i) { + const int pos = positions[i * max_index + idx1]; + if (pos >= 0) { + heap[pos].idx1 = POSITION_INVALID; + } + } + for (i = idx1 + 1; i < max_index; ++i) { + const int pos = positions[idx1 * max_index + i]; + if (pos >= 0) { + heap[pos].idx1 = POSITION_INVALID; + } + } + for (i = 0; i < idx2; ++i) { + const int pos = positions[i * max_index + idx2]; + if (pos >= 0) { + heap[pos].idx1 = POSITION_INVALID; + } + } + for (i = idx2 + 1; i < max_index; ++i) { + const int pos = positions[idx2 * max_index + i]; + if (pos >= 0) { + heap[pos].idx1 = POSITION_INVALID; + } + } +} + +// Combines histograms by continuously choosing the one with the highest cost +// reduction. +static int HistogramCombineGreedy(VP8LHistogramSet* const image_histo, + VP8LHistogram* const histos) { int ok = 0; - int i, iter; + int image_histo_size = image_histo->size; + int i, j; + VP8LHistogram** const histograms = image_histo->histograms; + // Indexes of remaining histograms. + int* const clusters = WebPSafeMalloc(image_histo_size, sizeof(*clusters)); + // Heap of histogram pairs. + HistoHeap histo_heap; + + if (!HistoHeapInit(&histo_heap, image_histo_size) || clusters == NULL) { + goto End; + } + + for (i = 0; i < image_histo_size; ++i) { + // Initialize clusters indexes. + clusters[i] = i; + for (j = i + 1; j < image_histo_size; ++j) { + // Initialize positions array. + histo_heap.positions[i * histo_heap.max_index + j] = POSITION_INVALID; + PreparePair(histograms, i, j, &histo_heap.heap[histo_heap.size], histos); + if (histo_heap.heap[histo_heap.size].cost_diff < 0) { + HeapPush(&histo_heap); + } + } + } + + while (image_histo_size > 1 && histo_heap.size > 0) { + const int idx1 = histo_heap.heap[0].idx1; + const int idx2 = histo_heap.heap[0].idx2; + VP8LHistogramAdd(histograms[idx2], histograms[idx1], histograms[idx1]); + histograms[idx1]->bit_cost_ = histo_heap.heap[0].cost_combo; + // Remove merged histogram. + for (i = 0; i + 1 < image_histo_size; ++i) { + if (clusters[i] >= idx2) { + clusters[i] = clusters[i + 1]; + } + } + --image_histo_size; + + // Invalidate pairs intersecting the just combined best pair. + InvalidatePairs(idx1, idx2, &histo_heap); + + // Pop invalid pairs from the top of the heap. + while (histo_heap.size > 0 && histo_heap.heap[0].idx1 < 0) { + HeapPop(&histo_heap); + } + + // Push new pairs formed with combined histogram to the heap. + for (i = 0; i < image_histo_size; ++i) { + if (clusters[i] != idx1) { + PreparePair(histograms, idx1, clusters[i], + &histo_heap.heap[histo_heap.size], histos); + if (histo_heap.heap[histo_heap.size].cost_diff < 0) { + HeapPush(&histo_heap); + } + } + } + } + // Move remaining histograms to the beginning of the array. + for (i = 0; i < image_histo_size; ++i) { + if (i != clusters[i]) { // swap the two histograms + HistogramSwap(&histograms[i], &histograms[clusters[i]]); + } + } + + image_histo->size = image_histo_size; + ok = 1; + + End: + WebPSafeFree(clusters); + HistoHeapClear(&histo_heap); + return ok; +} + +static VP8LHistogram* HistogramCombineStochastic( + VP8LHistogramSet* const image_histo, + VP8LHistogram* tmp_histo, + VP8LHistogram* best_combo, + int quality, int min_cluster_size) { + int iter; uint32_t seed = 0; int tries_with_no_success = 0; - const int min_cluster_size = 2; - int out_size = in->size; - const int outer_iters = in->size * 3; - VP8LHistogram* const histos = (VP8LHistogram*)malloc(2 * sizeof(*histos)); - VP8LHistogram* cur_combo = histos + 0; // trial merged histogram - VP8LHistogram* best_combo = histos + 1; // best merged histogram so far - if (histos == NULL) goto End; - - // Copy histograms from in[] to out[]. - assert(in->size <= out->size); - for (i = 0; i < in->size; ++i) { - in->histograms[i]->bit_cost_ = VP8LHistogramEstimateBits(in->histograms[i]); - *out->histograms[i] = *in->histograms[i]; - } - - // Collapse similar histograms in 'out'. - for (iter = 0; iter < outer_iters && out_size >= min_cluster_size; ++iter) { - // We pick the best pair to be combined out of 'inner_iters' pairs. + int image_histo_size = image_histo->size; + const int iter_mult = (quality < 25) ? 2 : 2 + (quality - 25) / 8; + const int outer_iters = image_histo_size * iter_mult; + const int num_pairs = image_histo_size / 2; + const int num_tries_no_success = outer_iters / 2; + VP8LHistogram** const histograms = image_histo->histograms; + + // Collapse similar histograms in 'image_histo'. + ++min_cluster_size; + for (iter = 0; + iter < outer_iters && image_histo_size >= min_cluster_size; + ++iter) { double best_cost_diff = 0.; - int best_idx1 = 0, best_idx2 = 1; + int best_idx1 = -1, best_idx2 = 1; int j; + const int num_tries = + (num_pairs < image_histo_size) ? num_pairs : image_histo_size; seed += iter; - for (j = 0; j < num_pairs; ++j) { + for (j = 0; j < num_tries; ++j) { double curr_cost_diff; // Choose two histograms at random and try to combine them. - const uint32_t idx1 = MyRand(&seed) % out_size; - const uint32_t tmp = ((j & 7) + 1) % (out_size - 1); - const uint32_t diff = (tmp < 3) ? tmp : MyRand(&seed) % (out_size - 1); - const uint32_t idx2 = (idx1 + diff + 1) % out_size; + const uint32_t idx1 = MyRand(&seed) % image_histo_size; + const uint32_t tmp = (j & 7) + 1; + const uint32_t diff = + (tmp < 3) ? tmp : MyRand(&seed) % (image_histo_size - 1); + const uint32_t idx2 = (idx1 + diff + 1) % image_histo_size; if (idx1 == idx2) { continue; } - *cur_combo = *out->histograms[idx1]; - VP8LHistogramAdd(cur_combo, out->histograms[idx2]); - cur_combo->bit_cost_ = VP8LHistogramEstimateBits(cur_combo); + // Calculate cost reduction on combining. - curr_cost_diff = cur_combo->bit_cost_ - - out->histograms[idx1]->bit_cost_ - - out->histograms[idx2]->bit_cost_; - if (best_cost_diff > curr_cost_diff) { // found a better pair? - { // swap cur/best combo histograms - VP8LHistogram* const tmp_histo = cur_combo; - cur_combo = best_combo; - best_combo = tmp_histo; - } + curr_cost_diff = HistogramAddEval(histograms[idx1], histograms[idx2], + tmp_histo, best_cost_diff); + if (curr_cost_diff < best_cost_diff) { // found a better pair? + HistogramSwap(&best_combo, &tmp_histo); best_cost_diff = curr_cost_diff; best_idx1 = idx1; best_idx2 = idx2; } } - if (best_cost_diff < 0.0) { - *out->histograms[best_idx1] = *best_combo; + if (best_idx1 >= 0) { + HistogramSwap(&best_combo, &histograms[best_idx1]); // swap best_idx2 slot with last one (which is now unused) - --out_size; - if (best_idx2 != out_size) { - out->histograms[best_idx2] = out->histograms[out_size]; - out->histograms[out_size] = NULL; // just for sanity check. + --image_histo_size; + if (best_idx2 != image_histo_size) { + HistogramSwap(&histograms[image_histo_size], &histograms[best_idx2]); + histograms[image_histo_size] = NULL; } tries_with_no_success = 0; } - if (++tries_with_no_success >= 50) { + if (++tries_with_no_success >= num_tries_no_success) { break; } } - out->size = out_size; - ok = 1; - - End: - free(histos); - return ok; + image_histo->size = image_histo_size; + return best_combo; } // ----------------------------------------------------------------------------- // Histogram refinement -// What is the bit cost of moving square_histogram from -// cur_symbol to candidate_symbol. -// TODO(skal): we don't really need to copy the histogram and Add(). Instead -// we just need VP8LDualHistogramEstimateBits(A, B) estimation function. -static double HistogramDistance(const VP8LHistogram* const square_histogram, - const VP8LHistogram* const candidate) { - const double previous_bit_cost = candidate->bit_cost_; - double new_bit_cost; - VP8LHistogram modified_histo; - modified_histo = *candidate; - VP8LHistogramAdd(&modified_histo, square_histogram); - new_bit_cost = VP8LHistogramEstimateBits(&modified_histo); - - return new_bit_cost - previous_bit_cost; -} - // Find the best 'out' histogram for each of the 'in' histograms. // Note: we assume that out[]->bit_cost_ is already up-to-date. -static void HistogramRemap(const VP8LHistogramSet* const in, - const VP8LHistogramSet* const out, +static void HistogramRemap(const VP8LHistogramSet* const orig_histo, + const VP8LHistogramSet* const image_histo, uint16_t* const symbols) { int i; - for (i = 0; i < in->size; ++i) { - int best_out = 0; - double best_bits = HistogramDistance(in->histograms[i], out->histograms[0]); - int k; - for (k = 1; k < out->size; ++k) { - const double cur_bits = - HistogramDistance(in->histograms[i], out->histograms[k]); - if (cur_bits < best_bits) { - best_bits = cur_bits; - best_out = k; + VP8LHistogram** const orig_histograms = orig_histo->histograms; + VP8LHistogram** const histograms = image_histo->histograms; + const int orig_histo_size = orig_histo->size; + const int image_histo_size = image_histo->size; + if (image_histo_size > 1) { + for (i = 0; i < orig_histo_size; ++i) { + int best_out = 0; + double best_bits = + HistogramAddThresh(histograms[0], orig_histograms[i], MAX_COST); + int k; + for (k = 1; k < image_histo_size; ++k) { + const double cur_bits = + HistogramAddThresh(histograms[k], orig_histograms[i], best_bits); + if (cur_bits < best_bits) { + best_bits = cur_bits; + best_out = k; + } } + symbols[i] = best_out; + } + } else { + assert(image_histo_size == 1); + for (i = 0; i < orig_histo_size; ++i) { + symbols[i] = 0; } - symbols[i] = best_out; } // Recompute each out based on raw and symbols. - for (i = 0; i < out->size; ++i) { - HistogramClear(out->histograms[i]); + for (i = 0; i < image_histo_size; ++i) { + HistogramClear(histograms[i]); } - for (i = 0; i < in->size; ++i) { - VP8LHistogramAdd(out->histograms[symbols[i]], in->histograms[i]); + + for (i = 0; i < orig_histo_size; ++i) { + const int idx = symbols[i]; + VP8LHistogramAdd(orig_histograms[i], histograms[idx], histograms[idx]); } } +static double GetCombineCostFactor(int histo_size, int quality) { + double combine_cost_factor = 0.16; + if (quality < 90) { + if (histo_size > 256) combine_cost_factor /= 2.; + if (histo_size > 512) combine_cost_factor /= 2.; + if (histo_size > 1024) combine_cost_factor /= 2.; + if (quality <= 50) combine_cost_factor /= 2.; + } + return combine_cost_factor; +} + int VP8LGetHistoImageSymbols(int xsize, int ysize, const VP8LBackwardRefs* const refs, - int quality, int histo_bits, int cache_bits, - VP8LHistogramSet* const image_in, + int quality, int low_effort, + int histo_bits, int cache_bits, + VP8LHistogramSet* const image_histo, + VP8LHistogramSet* const tmp_histos, uint16_t* const histogram_symbols) { int ok = 0; const int histo_xsize = histo_bits ? VP8LSubSampleSize(xsize, histo_bits) : 1; const int histo_ysize = histo_bits ? VP8LSubSampleSize(ysize, histo_bits) : 1; - const int num_histo_pairs = 10 + quality / 2; // For HistogramCombine(). - const int histo_image_raw_size = histo_xsize * histo_ysize; - VP8LHistogramSet* const image_out = - VP8LAllocateHistogramSet(histo_image_raw_size, cache_bits); - if (image_out == NULL) return 0; - - // Build histogram image. - HistogramBuildImage(xsize, histo_bits, refs, image_out); - // Collapse similar histograms. - if (!HistogramCombine(image_out, image_in, num_histo_pairs)) { - goto Error; + const int image_histo_raw_size = histo_xsize * histo_ysize; + const int entropy_combine_num_bins = low_effort ? NUM_PARTITIONS : BIN_SIZE; + + // The bin_map for every bin follows following semantics: + // bin_map[n][0] = num_histo; // The number of histograms in that bin. + // bin_map[n][1] = index of first histogram in that bin; + // bin_map[n][num_histo] = index of last histogram in that bin; + // bin_map[n][num_histo + 1] ... bin_map[n][bin_depth - 1] = unused indices. + const int bin_depth = image_histo_raw_size + 1; + int16_t* bin_map = NULL; + VP8LHistogramSet* const orig_histo = + VP8LAllocateHistogramSet(image_histo_raw_size, cache_bits); + VP8LHistogram* cur_combo; + const int entropy_combine = + (orig_histo->size > entropy_combine_num_bins * 2) && (quality < 100); + + if (orig_histo == NULL) goto Error; + + // Don't attempt linear bin-partition heuristic for: + // histograms of small sizes, as bin_map will be very sparse and; + // Maximum quality (q==100), to preserve the compression gains at that level. + if (entropy_combine) { + const int bin_map_size = bin_depth * entropy_combine_num_bins; + bin_map = (int16_t*)WebPSafeCalloc(bin_map_size, sizeof(*bin_map)); + if (bin_map == NULL) goto Error; } + + // Construct the histograms from backward references. + HistogramBuild(xsize, histo_bits, refs, orig_histo); + // Copies the histograms and computes its bit_cost. + HistogramCopyAndAnalyze(orig_histo, image_histo); + + cur_combo = tmp_histos->histograms[1]; // pick up working slot + if (entropy_combine) { + const double combine_cost_factor = + GetCombineCostFactor(image_histo_raw_size, quality); + HistogramAnalyzeEntropyBin(orig_histo, bin_map, low_effort); + // Collapse histograms with similar entropy. + cur_combo = HistogramCombineEntropyBin(image_histo, cur_combo, bin_map, + bin_depth, entropy_combine_num_bins, + combine_cost_factor, low_effort); + } + + // Don't combine the histograms using stochastic and greedy heuristics for + // low-effort compression mode. + if (!low_effort || !entropy_combine) { + const float x = quality / 100.f; + // cubic ramp between 1 and MAX_HISTO_GREEDY: + const int threshold_size = (int)(1 + (x * x * x) * (MAX_HISTO_GREEDY - 1)); + cur_combo = HistogramCombineStochastic(image_histo, + tmp_histos->histograms[0], + cur_combo, quality, threshold_size); + if ((image_histo->size <= threshold_size) && + !HistogramCombineGreedy(image_histo, cur_combo)) { + goto Error; + } + } + + // TODO(vikasa): Optimize HistogramRemap for low-effort compression mode also. // Find the optimal map from original histograms to the final ones. - HistogramRemap(image_out, image_in, histogram_symbols); + HistogramRemap(orig_histo, image_histo, histogram_symbols); + ok = 1; -Error: - free(image_out); + Error: + WebPSafeFree(bin_map); + VP8LFreeHistogramSet(orig_histo); return ok; } diff --git a/drivers/webp/enc/histogram.h b/drivers/webp/enc/histogram.h index 5b5de25539..adb16c01ca 100644 --- a/drivers/webp/enc/histogram.h +++ b/drivers/webp/enc/histogram.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Author: Jyrki Alakuijala (jyrki@google.com) @@ -12,17 +14,13 @@ #ifndef WEBP_ENC_HISTOGRAM_H_ #define WEBP_ENC_HISTOGRAM_H_ -#include <assert.h> -#include <stddef.h> -#include <stdlib.h> -#include <stdio.h> #include <string.h> #include "./backward_references.h" -#include "../format_constants.h" -#include "../types.h" +#include "../webp/format_constants.h" +#include "../webp/types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -30,18 +28,23 @@ extern "C" { typedef struct { // literal_ contains green literal, palette-code and // copy-length-prefix histogram - int literal_[PIX_OR_COPY_CODES_MAX]; - int red_[256]; - int blue_[256]; - int alpha_[256]; + uint32_t* literal_; // Pointer to the allocated buffer for literal. + uint32_t red_[NUM_LITERAL_CODES]; + uint32_t blue_[NUM_LITERAL_CODES]; + uint32_t alpha_[NUM_LITERAL_CODES]; // Backward reference prefix-code histogram. - int distance_[NUM_DISTANCE_CODES]; + uint32_t distance_[NUM_DISTANCE_CODES]; int palette_code_bits_; - double bit_cost_; // cached value of VP8LHistogramEstimateBits(this) + uint32_t trivial_symbol_; // True, if histograms for Red, Blue & Alpha + // literal symbols are single valued. + double bit_cost_; // cached value of bit cost. + double literal_cost_; // Cached values of dominant entropy costs: + double red_cost_; // literal, red & blue. + double blue_cost_; } VP8LHistogram; // Collection of histograms with fixed capacity, allocated as one -// big memory chunk. Can be destroyed by simply calling 'free()'. +// big memory chunk. Can be destroyed by calling WebPSafeFree(). typedef struct { int size; // number of slots currently in use int max_size; // maximum capacity @@ -57,6 +60,9 @@ void VP8LHistogramCreate(VP8LHistogram* const p, const VP8LBackwardRefs* const refs, int palette_code_bits); +// Return the size of the histogram for a given palette_code_bits. +int VP8LGetHistogramSize(int palette_code_bits); + // Set the palette_code_bits and reset the stats. void VP8LHistogramInit(VP8LHistogram* const p, int palette_code_bits); @@ -64,51 +70,40 @@ void VP8LHistogramInit(VP8LHistogram* const p, int palette_code_bits); void VP8LHistogramStoreRefs(const VP8LBackwardRefs* const refs, VP8LHistogram* const histo); +// Free the memory allocated for the histogram. +void VP8LFreeHistogram(VP8LHistogram* const histo); + +// Free the memory allocated for the histogram set. +void VP8LFreeHistogramSet(VP8LHistogramSet* const histo); + // Allocate an array of pointer to histograms, allocated and initialized // using 'cache_bits'. Return NULL in case of memory error. VP8LHistogramSet* VP8LAllocateHistogramSet(int size, int cache_bits); +// Allocate and initialize histogram object with specified 'cache_bits'. +// Returns NULL in case of memory error. +// Special case of VP8LAllocateHistogramSet, with size equals 1. +VP8LHistogram* VP8LAllocateHistogram(int cache_bits); + // Accumulate a token 'v' into a histogram. void VP8LHistogramAddSinglePixOrCopy(VP8LHistogram* const histo, const PixOrCopy* const v); -// Estimate how many bits the combined entropy of literals and distance -// approximately maps to. -double VP8LHistogramEstimateBits(const VP8LHistogram* const p); - -// This function estimates the cost in bits excluding the bits needed to -// represent the entropy code itself. -double VP8LHistogramEstimateBitsBulk(const VP8LHistogram* const p); - -static WEBP_INLINE void VP8LHistogramAdd(VP8LHistogram* const p, - const VP8LHistogram* const a) { - int i; - for (i = 0; i < PIX_OR_COPY_CODES_MAX; ++i) { - p->literal_[i] += a->literal_[i]; - } - for (i = 0; i < NUM_DISTANCE_CODES; ++i) { - p->distance_[i] += a->distance_[i]; - } - for (i = 0; i < 256; ++i) { - p->red_[i] += a->red_[i]; - p->blue_[i] += a->blue_[i]; - p->alpha_[i] += a->alpha_[i]; - } -} - -static WEBP_INLINE int VP8LHistogramNumCodes(const VP8LHistogram* const p) { - return 256 + NUM_LENGTH_CODES + - ((p->palette_code_bits_ > 0) ? (1 << p->palette_code_bits_) : 0); +static WEBP_INLINE int VP8LHistogramNumCodes(int palette_code_bits) { + return NUM_LITERAL_CODES + NUM_LENGTH_CODES + + ((palette_code_bits > 0) ? (1 << palette_code_bits) : 0); } // Builds the histogram image. int VP8LGetHistoImageSymbols(int xsize, int ysize, const VP8LBackwardRefs* const refs, - int quality, int histogram_bits, int cache_bits, + int quality, int low_effort, + int histogram_bits, int cache_bits, VP8LHistogramSet* const image_in, + VP8LHistogramSet* const tmp_histos, uint16_t* const histogram_symbols); -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } #endif diff --git a/drivers/webp/enc/iterator.c b/drivers/webp/enc/iterator.c index 86e473bcf0..99d960a547 100644 --- a/drivers/webp/enc/iterator.c +++ b/drivers/webp/enc/iterator.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // VP8Iterator: block iterator @@ -13,21 +15,16 @@ #include "./vp8enci.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // VP8Iterator //------------------------------------------------------------------------------ static void InitLeft(VP8EncIterator* const it) { - const VP8Encoder* const enc = it->enc_; - enc->y_left_[-1] = enc->u_left_[-1] = enc->v_left_[-1] = + it->y_left_[-1] = it->u_left_[-1] = it->v_left_[-1] = (it->y_ > 0) ? 129 : 127; - memset(enc->y_left_, 129, 16); - memset(enc->u_left_, 129, 8); - memset(enc->v_left_, 129, 8); + memset(it->y_left_, 129, 16); + memset(it->u_left_, 129, 8); + memset(it->v_left_, 129, 8); it->left_nz_[8] = 0; } @@ -38,43 +35,60 @@ static void InitTop(VP8EncIterator* const it) { memset(enc->nz_, 0, enc->mb_w_ * sizeof(*enc->nz_)); } -void VP8IteratorReset(VP8EncIterator* const it) { +void VP8IteratorSetRow(VP8EncIterator* const it, int y) { VP8Encoder* const enc = it->enc_; it->x_ = 0; - it->y_ = 0; - it->y_offset_ = 0; - it->uv_offset_ = 0; - it->mb_ = enc->mb_info_; - it->preds_ = enc->preds_; + it->y_ = y; + it->bw_ = &enc->parts_[y & (enc->num_parts_ - 1)]; + it->preds_ = enc->preds_ + y * 4 * enc->preds_w_; it->nz_ = enc->nz_; - it->bw_ = &enc->parts_[0]; - it->done_ = enc->mb_w_* enc->mb_h_; + it->mb_ = enc->mb_info_ + y * enc->mb_w_; + it->y_top_ = enc->y_top_; + it->uv_top_ = enc->uv_top_; + InitLeft(it); +} + +void VP8IteratorReset(VP8EncIterator* const it) { + VP8Encoder* const enc = it->enc_; + VP8IteratorSetRow(it, 0); + VP8IteratorSetCountDown(it, enc->mb_w_ * enc->mb_h_); // default InitTop(it); InitLeft(it); memset(it->bit_count_, 0, sizeof(it->bit_count_)); it->do_trellis_ = 0; } +void VP8IteratorSetCountDown(VP8EncIterator* const it, int count_down) { + it->count_down_ = it->count_down0_ = count_down; +} + +int VP8IteratorIsDone(const VP8EncIterator* const it) { + return (it->count_down_ <= 0); +} + void VP8IteratorInit(VP8Encoder* const enc, VP8EncIterator* const it) { it->enc_ = enc; it->y_stride_ = enc->pic_->y_stride; it->uv_stride_ = enc->pic_->uv_stride; - // TODO(later): for multithreading, these should be owned by 'it'. - it->yuv_in_ = enc->yuv_in_; - it->yuv_out_ = enc->yuv_out_; - it->yuv_out2_ = enc->yuv_out2_; - it->yuv_p_ = enc->yuv_p_; + it->yuv_in_ = (uint8_t*)WEBP_ALIGN(it->yuv_mem_); + it->yuv_out_ = it->yuv_in_ + YUV_SIZE_ENC; + it->yuv_out2_ = it->yuv_out_ + YUV_SIZE_ENC; + it->yuv_p_ = it->yuv_out2_ + YUV_SIZE_ENC; it->lf_stats_ = enc->lf_stats_; it->percent0_ = enc->percent_; + it->y_left_ = (uint8_t*)WEBP_ALIGN(it->yuv_left_mem_ + 1); + it->u_left_ = it->y_left_ + 16 + 16; + it->v_left_ = it->u_left_ + 16; VP8IteratorReset(it); } int VP8IteratorProgress(const VP8EncIterator* const it, int delta) { VP8Encoder* const enc = it->enc_; - if (delta && enc->pic_->progress_hook) { - const int percent = (enc->mb_h_ <= 1) + if (delta && enc->pic_->progress_hook != NULL) { + const int done = it->count_down0_ - it->count_down_; + const int percent = (it->count_down0_ <= 0) ? it->percent0_ - : it->percent0_ + delta * it->y_ / (enc->mb_h_ - 1); + : it->percent0_ + delta * done / it->count_down0_; return WebPReportProgress(enc->pic_, percent, &enc->percent_); } return 1; @@ -84,6 +98,8 @@ int VP8IteratorProgress(const VP8EncIterator* const it, int delta) { // Import the source samples into the cache. Takes care of replicating // boundary pixels if necessary. +static WEBP_INLINE int MinSize(int a, int b) { return (a < b) ? a : b; } + static void ImportBlock(const uint8_t* src, int src_stride, uint8_t* dst, int w, int h, int size) { int i; @@ -101,30 +117,55 @@ static void ImportBlock(const uint8_t* src, int src_stride, } } -void VP8IteratorImport(const VP8EncIterator* const it) { +static void ImportLine(const uint8_t* src, int src_stride, + uint8_t* dst, int len, int total_len) { + int i; + for (i = 0; i < len; ++i, src += src_stride) dst[i] = *src; + for (; i < total_len; ++i) dst[i] = dst[len - 1]; +} + +void VP8IteratorImport(VP8EncIterator* const it, uint8_t* tmp_32) { const VP8Encoder* const enc = it->enc_; const int x = it->x_, y = it->y_; const WebPPicture* const pic = enc->pic_; - const uint8_t* const ysrc = pic->y + (y * pic->y_stride + x) * 16; + const uint8_t* const ysrc = pic->y + (y * pic->y_stride + x) * 16; const uint8_t* const usrc = pic->u + (y * pic->uv_stride + x) * 8; const uint8_t* const vsrc = pic->v + (y * pic->uv_stride + x) * 8; - uint8_t* const ydst = it->yuv_in_ + Y_OFF; - uint8_t* const udst = it->yuv_in_ + U_OFF; - uint8_t* const vdst = it->yuv_in_ + V_OFF; - int w = (pic->width - x * 16); - int h = (pic->height - y * 16); - - if (w > 16) w = 16; - if (h > 16) h = 16; - - // Luma plane - ImportBlock(ysrc, pic->y_stride, ydst, w, h, 16); - - { // U/V planes - const int uv_w = (w + 1) >> 1; - const int uv_h = (h + 1) >> 1; - ImportBlock(usrc, pic->uv_stride, udst, uv_w, uv_h, 8); - ImportBlock(vsrc, pic->uv_stride, vdst, uv_w, uv_h, 8); + const int w = MinSize(pic->width - x * 16, 16); + const int h = MinSize(pic->height - y * 16, 16); + const int uv_w = (w + 1) >> 1; + const int uv_h = (h + 1) >> 1; + + ImportBlock(ysrc, pic->y_stride, it->yuv_in_ + Y_OFF_ENC, w, h, 16); + ImportBlock(usrc, pic->uv_stride, it->yuv_in_ + U_OFF_ENC, uv_w, uv_h, 8); + ImportBlock(vsrc, pic->uv_stride, it->yuv_in_ + V_OFF_ENC, uv_w, uv_h, 8); + + if (tmp_32 == NULL) return; + + // Import source (uncompressed) samples into boundary. + if (x == 0) { + InitLeft(it); + } else { + if (y == 0) { + it->y_left_[-1] = it->u_left_[-1] = it->v_left_[-1] = 127; + } else { + it->y_left_[-1] = ysrc[- 1 - pic->y_stride]; + it->u_left_[-1] = usrc[- 1 - pic->uv_stride]; + it->v_left_[-1] = vsrc[- 1 - pic->uv_stride]; + } + ImportLine(ysrc - 1, pic->y_stride, it->y_left_, h, 16); + ImportLine(usrc - 1, pic->uv_stride, it->u_left_, uv_h, 8); + ImportLine(vsrc - 1, pic->uv_stride, it->v_left_, uv_h, 8); + } + + it->y_top_ = tmp_32 + 0; + it->uv_top_ = tmp_32 + 16; + if (y == 0) { + memset(tmp_32, 127, 32 * sizeof(*tmp_32)); + } else { + ImportLine(ysrc - pic->y_stride, 1, tmp_32, w, 16); + ImportLine(usrc - pic->uv_stride, 1, tmp_32 + 16, uv_w, 8); + ImportLine(vsrc - pic->uv_stride, 1, tmp_32 + 16 + 8, uv_w, 8); } } @@ -144,9 +185,9 @@ void VP8IteratorExport(const VP8EncIterator* const it) { const VP8Encoder* const enc = it->enc_; if (enc->config_->show_compressed) { const int x = it->x_, y = it->y_; - const uint8_t* const ysrc = it->yuv_out_ + Y_OFF; - const uint8_t* const usrc = it->yuv_out_ + U_OFF; - const uint8_t* const vsrc = it->yuv_out_ + V_OFF; + const uint8_t* const ysrc = it->yuv_out_ + Y_OFF_ENC; + const uint8_t* const usrc = it->yuv_out_ + U_OFF_ENC; + const uint8_t* const vsrc = it->yuv_out_ + V_OFF_ENC; const WebPPicture* const pic = enc->pic_; uint8_t* const ydst = pic->y + (y * pic->y_stride + x) * 16; uint8_t* const udst = pic->u + (y * pic->uv_stride + x) * 8; @@ -240,48 +281,44 @@ void VP8IteratorBytesToNz(VP8EncIterator* const it) { #undef BIT //------------------------------------------------------------------------------ -// Advance to the next position, doing the bookeeping. +// Advance to the next position, doing the bookkeeping. -int VP8IteratorNext(VP8EncIterator* const it, - const uint8_t* const block_to_save) { +void VP8IteratorSaveBoundary(VP8EncIterator* const it) { VP8Encoder* const enc = it->enc_; - if (block_to_save) { - const int x = it->x_, y = it->y_; - const uint8_t* const ysrc = block_to_save + Y_OFF; - const uint8_t* const usrc = block_to_save + U_OFF; - if (x < enc->mb_w_ - 1) { // left - int i; - for (i = 0; i < 16; ++i) { - enc->y_left_[i] = ysrc[15 + i * BPS]; - } - for (i = 0; i < 8; ++i) { - enc->u_left_[i] = usrc[7 + i * BPS]; - enc->v_left_[i] = usrc[15 + i * BPS]; - } - // top-left (before 'top'!) - enc->y_left_[-1] = enc->y_top_[x * 16 + 15]; - enc->u_left_[-1] = enc->uv_top_[x * 16 + 0 + 7]; - enc->v_left_[-1] = enc->uv_top_[x * 16 + 8 + 7]; + const int x = it->x_, y = it->y_; + const uint8_t* const ysrc = it->yuv_out_ + Y_OFF_ENC; + const uint8_t* const uvsrc = it->yuv_out_ + U_OFF_ENC; + if (x < enc->mb_w_ - 1) { // left + int i; + for (i = 0; i < 16; ++i) { + it->y_left_[i] = ysrc[15 + i * BPS]; } - if (y < enc->mb_h_ - 1) { // top - memcpy(enc->y_top_ + x * 16, ysrc + 15 * BPS, 16); - memcpy(enc->uv_top_ + x * 16, usrc + 7 * BPS, 8 + 8); + for (i = 0; i < 8; ++i) { + it->u_left_[i] = uvsrc[7 + i * BPS]; + it->v_left_[i] = uvsrc[15 + i * BPS]; } + // top-left (before 'top'!) + it->y_left_[-1] = it->y_top_[15]; + it->u_left_[-1] = it->uv_top_[0 + 7]; + it->v_left_[-1] = it->uv_top_[8 + 7]; } + if (y < enc->mb_h_ - 1) { // top + memcpy(it->y_top_, ysrc + 15 * BPS, 16); + memcpy(it->uv_top_, uvsrc + 7 * BPS, 8 + 8); + } +} - it->mb_++; +int VP8IteratorNext(VP8EncIterator* const it) { it->preds_ += 4; - it->nz_++; - it->x_++; - if (it->x_ == enc->mb_w_) { - it->x_ = 0; - it->y_++; - it->bw_ = &enc->parts_[it->y_ & (enc->num_parts_ - 1)]; - it->preds_ = enc->preds_ + it->y_ * 4 * enc->preds_w_; - it->nz_ = enc->nz_; - InitLeft(it); + it->mb_ += 1; + it->nz_ += 1; + it->y_top_ += 16; + it->uv_top_ += 16; + it->x_ += 1; + if (it->x_ == it->enc_->mb_w_) { + VP8IteratorSetRow(it, ++it->y_); } - return (0 < --it->done_); + return (0 < --it->count_down_); } //------------------------------------------------------------------------------ @@ -368,15 +405,15 @@ void VP8IteratorStartI4(VP8EncIterator* const it) { // Import the boundary samples for (i = 0; i < 17; ++i) { // left - it->i4_boundary_[i] = enc->y_left_[15 - i]; + it->i4_boundary_[i] = it->y_left_[15 - i]; } for (i = 0; i < 16; ++i) { // top - it->i4_boundary_[17 + i] = enc->y_top_[it->x_ * 16 + i]; + it->i4_boundary_[17 + i] = it->y_top_[i]; } // top-right samples have a special case on the far right of the picture if (it->x_ < enc->mb_w_ - 1) { for (i = 16; i < 16 + 4; ++i) { - it->i4_boundary_[17 + i] = enc->y_top_[it->x_ * 16 + i]; + it->i4_boundary_[17 + i] = it->y_top_[i]; } } else { // else, replicate the last valid pixel four times for (i = 16; i < 16 + 4; ++i) { @@ -417,6 +454,3 @@ int VP8IteratorRotateI4(VP8EncIterator* const it, //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/enc/picture.c b/drivers/webp/enc/picture.c index 44eed06083..26679a72e4 100644 --- a/drivers/webp/enc/picture.c +++ b/drivers/webp/enc/picture.c @@ -1,470 +1,179 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // -// WebPPicture utils: colorspace conversion, crop, ... +// WebPPicture class basis // // Author: Skal (pascal.massimino@gmail.com) #include <assert.h> #include <stdlib.h> -#include <math.h> #include "./vp8enci.h" -#include "../utils/rescaler.h" -#include "../utils/utils.h" #include "../dsp/dsp.h" -#include "../dsp/yuv.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -#define HALVE(x) (((x) + 1) >> 1) -#define IS_YUV_CSP(csp, YUV_CSP) (((csp) & WEBP_CSP_UV_MASK) == (YUV_CSP)) - -static const union { - uint32_t argb; - uint8_t bytes[4]; -} test_endian = { 0xff000000u }; -#define ALPHA_IS_LAST (test_endian.bytes[3] == 0xff) +#include "../utils/utils.h" //------------------------------------------------------------------------------ // WebPPicture //------------------------------------------------------------------------------ -int WebPPictureAlloc(WebPPicture* picture) { - if (picture != NULL) { - const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; - const int has_alpha = picture->colorspace & WEBP_CSP_ALPHA_BIT; - const int width = picture->width; - const int height = picture->height; - - if (!picture->use_argb) { - const int y_stride = width; - const int uv_width = HALVE(width); - const int uv_height = HALVE(height); - const int uv_stride = uv_width; - int uv0_stride = 0; - int a_width, a_stride; - uint64_t y_size, uv_size, uv0_size, a_size, total_size; - uint8_t* mem; - - // U/V - switch (uv_csp) { - case WEBP_YUV420: - break; -#ifdef WEBP_EXPERIMENTAL_FEATURES - case WEBP_YUV400: // for now, we'll just reset the U/V samples - break; - case WEBP_YUV422: - uv0_stride = uv_width; - break; - case WEBP_YUV444: - uv0_stride = width; - break; -#endif - default: - return 0; - } - uv0_size = height * uv0_stride; - - // alpha - a_width = has_alpha ? width : 0; - a_stride = a_width; - y_size = (uint64_t)y_stride * height; - uv_size = (uint64_t)uv_stride * uv_height; - a_size = (uint64_t)a_stride * height; - - total_size = y_size + a_size + 2 * uv_size + 2 * uv0_size; - - // Security and validation checks - if (width <= 0 || height <= 0 || // luma/alpha param error - uv_width < 0 || uv_height < 0) { // u/v param error - return 0; - } - // Clear previous buffer and allocate a new one. - WebPPictureFree(picture); // erase previous buffer - mem = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*mem)); - if (mem == NULL) return 0; - - // From now on, we're in the clear, we can no longer fail... - picture->memory_ = (void*)mem; - picture->y_stride = y_stride; - picture->uv_stride = uv_stride; - picture->a_stride = a_stride; - picture->uv0_stride = uv0_stride; - // TODO(skal): we could align the y/u/v planes and adjust stride. - picture->y = mem; - mem += y_size; - - picture->u = mem; - mem += uv_size; - picture->v = mem; - mem += uv_size; - - if (a_size) { - picture->a = mem; - mem += a_size; - } - if (uv0_size) { - picture->u0 = mem; - mem += uv0_size; - picture->v0 = mem; - mem += uv0_size; - } - } else { - void* memory; - const uint64_t argb_size = (uint64_t)width * height; - if (width <= 0 || height <= 0) { - return 0; - } - // Clear previous buffer and allocate a new one. - WebPPictureFree(picture); // erase previous buffer - memory = WebPSafeMalloc(argb_size, sizeof(*picture->argb)); - if (memory == NULL) return 0; +static int DummyWriter(const uint8_t* data, size_t data_size, + const WebPPicture* const picture) { + // The following are to prevent 'unused variable' error message. + (void)data; + (void)data_size; + (void)picture; + return 1; +} - // TODO(skal): align plane to cache line? - picture->memory_argb_ = memory; - picture->argb = (uint32_t*)memory; - picture->argb_stride = width; - } +int WebPPictureInitInternal(WebPPicture* picture, int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) { + return 0; // caller/system version mismatch! + } + if (picture != NULL) { + memset(picture, 0, sizeof(*picture)); + picture->writer = DummyWriter; + WebPEncodingSetError(picture, VP8_ENC_OK); } return 1; } -// Remove reference to the ARGB buffer (doesn't free anything). -static void PictureResetARGB(WebPPicture* const picture) { +//------------------------------------------------------------------------------ + +static void WebPPictureResetBufferARGB(WebPPicture* const picture) { picture->memory_argb_ = NULL; picture->argb = NULL; picture->argb_stride = 0; } -// Remove reference to the YUVA buffer (doesn't free anything). -static void PictureResetYUVA(WebPPicture* const picture) { +static void WebPPictureResetBufferYUVA(WebPPicture* const picture) { picture->memory_ = NULL; picture->y = picture->u = picture->v = picture->a = NULL; - picture->u0 = picture->v0 = NULL; picture->y_stride = picture->uv_stride = 0; picture->a_stride = 0; - picture->uv0_stride = 0; } -// Grab the 'specs' (writer, *opaque, width, height...) from 'src' and copy them -// into 'dst'. Mark 'dst' as not owning any memory. -static void WebPPictureGrabSpecs(const WebPPicture* const src, - WebPPicture* const dst) { - assert(src != NULL && dst != NULL); - *dst = *src; - PictureResetYUVA(dst); - PictureResetARGB(dst); +void WebPPictureResetBuffers(WebPPicture* const picture) { + WebPPictureResetBufferARGB(picture); + WebPPictureResetBufferYUVA(picture); } -// Allocate a new argb buffer, discarding any existing one and preserving -// the other YUV(A) buffer. -static int PictureAllocARGB(WebPPicture* const picture) { - WebPPicture tmp; - free(picture->memory_argb_); - PictureResetARGB(picture); - picture->use_argb = 1; - WebPPictureGrabSpecs(picture, &tmp); - if (!WebPPictureAlloc(&tmp)) { - return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); - } - picture->memory_argb_ = tmp.memory_argb_; - picture->argb = tmp.argb; - picture->argb_stride = tmp.argb_stride; - return 1; -} +int WebPPictureAllocARGB(WebPPicture* const picture, int width, int height) { + void* memory; + const uint64_t argb_size = (uint64_t)width * height; -// Release memory owned by 'picture' (both YUV and ARGB buffers). -void WebPPictureFree(WebPPicture* picture) { - if (picture != NULL) { - free(picture->memory_); - free(picture->memory_argb_); - PictureResetYUVA(picture); - PictureResetARGB(picture); - } -} + assert(picture != NULL); -//------------------------------------------------------------------------------ -// Picture copying + WebPSafeFree(picture->memory_argb_); + WebPPictureResetBufferARGB(picture); -// Not worth moving to dsp/enc.c (only used here). -static void CopyPlane(const uint8_t* src, int src_stride, - uint8_t* dst, int dst_stride, int width, int height) { - while (height-- > 0) { - memcpy(dst, src, width); - src += src_stride; - dst += dst_stride; + if (width <= 0 || height <= 0) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_BAD_DIMENSION); } -} - -// Adjust top-left corner to chroma sample position. -static void SnapTopLeftPosition(const WebPPicture* const pic, - int* const left, int* const top) { - if (!pic->use_argb) { - const int is_yuv422 = IS_YUV_CSP(pic->colorspace, WEBP_YUV422); - if (IS_YUV_CSP(pic->colorspace, WEBP_YUV420) || is_yuv422) { - *left &= ~1; - if (!is_yuv422) *top &= ~1; - } + // allocate a new buffer. + memory = WebPSafeMalloc(argb_size, sizeof(*picture->argb)); + if (memory == NULL) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); } -} - -// Adjust top-left corner and verify that the sub-rectangle is valid. -static int AdjustAndCheckRectangle(const WebPPicture* const pic, - int* const left, int* const top, - int width, int height) { - SnapTopLeftPosition(pic, left, top); - if ((*left) < 0 || (*top) < 0) return 0; - if (width <= 0 || height <= 0) return 0; - if ((*left) + width > pic->width) return 0; - if ((*top) + height > pic->height) return 0; + // TODO(skal): align plane to cache line? + picture->memory_argb_ = memory; + picture->argb = (uint32_t*)memory; + picture->argb_stride = width; return 1; } -int WebPPictureCopy(const WebPPicture* src, WebPPicture* dst) { - if (src == NULL || dst == NULL) return 0; - if (src == dst) return 1; +int WebPPictureAllocYUVA(WebPPicture* const picture, int width, int height) { + const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; + const int has_alpha = picture->colorspace & WEBP_CSP_ALPHA_BIT; + const int y_stride = width; + const int uv_width = (width + 1) >> 1; + const int uv_height = (height + 1) >> 1; + const int uv_stride = uv_width; + int a_width, a_stride; + uint64_t y_size, uv_size, a_size, total_size; + uint8_t* mem; - WebPPictureGrabSpecs(src, dst); - if (!WebPPictureAlloc(dst)) return 0; + assert(picture != NULL); - if (!src->use_argb) { - CopyPlane(src->y, src->y_stride, - dst->y, dst->y_stride, dst->width, dst->height); - CopyPlane(src->u, src->uv_stride, - dst->u, dst->uv_stride, HALVE(dst->width), HALVE(dst->height)); - CopyPlane(src->v, src->uv_stride, - dst->v, dst->uv_stride, HALVE(dst->width), HALVE(dst->height)); - if (dst->a != NULL) { - CopyPlane(src->a, src->a_stride, - dst->a, dst->a_stride, dst->width, dst->height); - } -#ifdef WEBP_EXPERIMENTAL_FEATURES - if (dst->u0 != NULL) { - int uv0_width = src->width; - if (IS_YUV_CSP(dst->colorspace, WEBP_YUV422)) { - uv0_width = HALVE(uv0_width); - } - CopyPlane(src->u0, src->uv0_stride, - dst->u0, dst->uv0_stride, uv0_width, dst->height); - CopyPlane(src->v0, src->uv0_stride, - dst->v0, dst->uv0_stride, uv0_width, dst->height); - } -#endif - } else { - CopyPlane((const uint8_t*)src->argb, 4 * src->argb_stride, - (uint8_t*)dst->argb, 4 * dst->argb_stride, - 4 * dst->width, dst->height); - } - return 1; -} + WebPSafeFree(picture->memory_); + WebPPictureResetBufferYUVA(picture); -int WebPPictureIsView(const WebPPicture* picture) { - if (picture == NULL) return 0; - if (picture->use_argb) { - return (picture->memory_argb_ == NULL); + if (uv_csp != WEBP_YUV420) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); } - return (picture->memory_ == NULL); -} -int WebPPictureView(const WebPPicture* src, - int left, int top, int width, int height, - WebPPicture* dst) { - if (src == NULL || dst == NULL) return 0; + // alpha + a_width = has_alpha ? width : 0; + a_stride = a_width; + y_size = (uint64_t)y_stride * height; + uv_size = (uint64_t)uv_stride * uv_height; + a_size = (uint64_t)a_stride * height; - // verify rectangle position. - if (!AdjustAndCheckRectangle(src, &left, &top, width, height)) return 0; + total_size = y_size + a_size + 2 * uv_size; - if (src != dst) { // beware of aliasing! We don't want to leak 'memory_'. - WebPPictureGrabSpecs(src, dst); + // Security and validation checks + if (width <= 0 || height <= 0 || // luma/alpha param error + uv_width < 0 || uv_height < 0) { // u/v param error + return WebPEncodingSetError(picture, VP8_ENC_ERROR_BAD_DIMENSION); } - dst->width = width; - dst->height = height; - if (!src->use_argb) { - dst->y = src->y + top * src->y_stride + left; - dst->u = src->u + (top >> 1) * src->uv_stride + (left >> 1); - dst->v = src->v + (top >> 1) * src->uv_stride + (left >> 1); - if (src->a != NULL) { - dst->a = src->a + top * src->a_stride + left; - } -#ifdef WEBP_EXPERIMENTAL_FEATURES - if (src->u0 != NULL) { - const int left_pos = - IS_YUV_CSP(dst->colorspace, WEBP_YUV422) ? (left >> 1) : left; - dst->u0 = src->u0 + top * src->uv0_stride + left_pos; - dst->v0 = src->v0 + top * src->uv0_stride + left_pos; - } -#endif - } else { - dst->argb = src->argb + top * src->argb_stride + left; + // allocate a new buffer. + mem = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*mem)); + if (mem == NULL) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); } - return 1; -} -//------------------------------------------------------------------------------ -// Picture cropping + // From now on, we're in the clear, we can no longer fail... + picture->memory_ = (void*)mem; + picture->y_stride = y_stride; + picture->uv_stride = uv_stride; + picture->a_stride = a_stride; -int WebPPictureCrop(WebPPicture* pic, - int left, int top, int width, int height) { - WebPPicture tmp; + // TODO(skal): we could align the y/u/v planes and adjust stride. + picture->y = mem; + mem += y_size; - if (pic == NULL) return 0; - if (!AdjustAndCheckRectangle(pic, &left, &top, width, height)) return 0; + picture->u = mem; + mem += uv_size; + picture->v = mem; + mem += uv_size; - WebPPictureGrabSpecs(pic, &tmp); - tmp.width = width; - tmp.height = height; - if (!WebPPictureAlloc(&tmp)) return 0; - - if (!pic->use_argb) { - const int y_offset = top * pic->y_stride + left; - const int uv_offset = (top / 2) * pic->uv_stride + left / 2; - CopyPlane(pic->y + y_offset, pic->y_stride, - tmp.y, tmp.y_stride, width, height); - CopyPlane(pic->u + uv_offset, pic->uv_stride, - tmp.u, tmp.uv_stride, HALVE(width), HALVE(height)); - CopyPlane(pic->v + uv_offset, pic->uv_stride, - tmp.v, tmp.uv_stride, HALVE(width), HALVE(height)); - - if (tmp.a != NULL) { - const int a_offset = top * pic->a_stride + left; - CopyPlane(pic->a + a_offset, pic->a_stride, - tmp.a, tmp.a_stride, width, height); - } -#ifdef WEBP_EXPERIMENTAL_FEATURES - if (tmp.u0 != NULL) { - int w = width; - int left_pos = left; - if (IS_YUV_CSP(tmp.colorspace, WEBP_YUV422)) { - w = HALVE(w); - left_pos = HALVE(left_pos); - } - CopyPlane(pic->u0 + top * pic->uv0_stride + left_pos, pic->uv0_stride, - tmp.u0, tmp.uv0_stride, w, height); - CopyPlane(pic->v0 + top * pic->uv0_stride + left_pos, pic->uv0_stride, - tmp.v0, tmp.uv0_stride, w, height); - } -#endif - } else { - const uint8_t* const src = - (const uint8_t*)(pic->argb + top * pic->argb_stride + left); - CopyPlane(src, pic->argb_stride * 4, - (uint8_t*)tmp.argb, tmp.argb_stride * 4, - width * 4, height); + if (a_size > 0) { + picture->a = mem; + mem += a_size; } - WebPPictureFree(pic); - *pic = tmp; + (void)mem; // makes the static analyzer happy return 1; } -//------------------------------------------------------------------------------ -// Simple picture rescaler - -static void RescalePlane(const uint8_t* src, - int src_width, int src_height, int src_stride, - uint8_t* dst, - int dst_width, int dst_height, int dst_stride, - int32_t* const work, - int num_channels) { - WebPRescaler rescaler; - int y = 0; - WebPRescalerInit(&rescaler, src_width, src_height, - dst, dst_width, dst_height, dst_stride, - num_channels, - src_width, dst_width, - src_height, dst_height, - work); - memset(work, 0, 2 * dst_width * num_channels * sizeof(*work)); - while (y < src_height) { - y += WebPRescalerImport(&rescaler, src_height - y, - src + y * src_stride, src_stride); - WebPRescalerExport(&rescaler); - } -} - -int WebPPictureRescale(WebPPicture* pic, int width, int height) { - WebPPicture tmp; - int prev_width, prev_height; - int32_t* work; - - if (pic == NULL) return 0; - prev_width = pic->width; - prev_height = pic->height; - // if width is unspecified, scale original proportionally to height ratio. - if (width == 0) { - width = (prev_width * height + prev_height / 2) / prev_height; - } - // if height is unspecified, scale original proportionally to width ratio. - if (height == 0) { - height = (prev_height * width + prev_width / 2) / prev_width; - } - // Check if the overall dimensions still make sense. - if (width <= 0 || height <= 0) return 0; - - WebPPictureGrabSpecs(pic, &tmp); - tmp.width = width; - tmp.height = height; - if (!WebPPictureAlloc(&tmp)) return 0; - - if (!pic->use_argb) { - work = (int32_t*)WebPSafeMalloc(2ULL * width, sizeof(*work)); - if (work == NULL) { - WebPPictureFree(&tmp); - return 0; - } +int WebPPictureAlloc(WebPPicture* picture) { + if (picture != NULL) { + const int width = picture->width; + const int height = picture->height; - RescalePlane(pic->y, prev_width, prev_height, pic->y_stride, - tmp.y, width, height, tmp.y_stride, work, 1); - RescalePlane(pic->u, - HALVE(prev_width), HALVE(prev_height), pic->uv_stride, - tmp.u, - HALVE(width), HALVE(height), tmp.uv_stride, work, 1); - RescalePlane(pic->v, - HALVE(prev_width), HALVE(prev_height), pic->uv_stride, - tmp.v, - HALVE(width), HALVE(height), tmp.uv_stride, work, 1); + WebPPictureFree(picture); // erase previous buffer - if (tmp.a != NULL) { - RescalePlane(pic->a, prev_width, prev_height, pic->a_stride, - tmp.a, width, height, tmp.a_stride, work, 1); - } -#ifdef WEBP_EXPERIMENTAL_FEATURES - if (tmp.u0 != NULL) { - const int s = IS_YUV_CSP(tmp.colorspace, WEBP_YUV422) ? 2 : 1; - RescalePlane( - pic->u0, (prev_width + s / 2) / s, prev_height, pic->uv0_stride, - tmp.u0, (width + s / 2) / s, height, tmp.uv0_stride, work, 1); - RescalePlane( - pic->v0, (prev_width + s / 2) / s, prev_height, pic->uv0_stride, - tmp.v0, (width + s / 2) / s, height, tmp.uv0_stride, work, 1); - } -#endif - } else { - work = (int32_t*)WebPSafeMalloc(2ULL * width * 4, sizeof(*work)); - if (work == NULL) { - WebPPictureFree(&tmp); - return 0; + if (!picture->use_argb) { + return WebPPictureAllocYUVA(picture, width, height); + } else { + return WebPPictureAllocARGB(picture, width, height); } - - RescalePlane((const uint8_t*)pic->argb, prev_width, prev_height, - pic->argb_stride * 4, - (uint8_t*)tmp.argb, width, height, - tmp.argb_stride * 4, - work, 4); - } - WebPPictureFree(pic); - free(work); - *pic = tmp; return 1; } +void WebPPictureFree(WebPPicture* picture) { + if (picture != NULL) { + WebPSafeFree(picture->memory_); + WebPSafeFree(picture->memory_argb_); + WebPPictureResetBuffers(picture); + } +} + //------------------------------------------------------------------------------ // WebPMemoryWriter: Write-to-memory @@ -494,7 +203,7 @@ int WebPMemoryWrite(const uint8_t* data, size_t data_size, if (w->size > 0) { memcpy(new_mem, w->mem, w->size); } - free(w->mem); + WebPSafeFree(w->mem); w->mem = new_mem; // down-cast is ok, thanks to WebPSafeMalloc w->max_size = (size_t)next_max_size; @@ -506,469 +215,13 @@ int WebPMemoryWrite(const uint8_t* data, size_t data_size, return 1; } -//------------------------------------------------------------------------------ -// Detection of non-trivial transparency - -// Returns true if alpha[] has non-0xff values. -static int CheckNonOpaque(const uint8_t* alpha, int width, int height, - int x_step, int y_step) { - if (alpha == NULL) return 0; - while (height-- > 0) { - int x; - for (x = 0; x < width * x_step; x += x_step) { - if (alpha[x] != 0xff) return 1; // TODO(skal): check 4/8 bytes at a time. - } - alpha += y_step; - } - return 0; -} - -// Checking for the presence of non-opaque alpha. -int WebPPictureHasTransparency(const WebPPicture* picture) { - if (picture == NULL) return 0; - if (!picture->use_argb) { - return CheckNonOpaque(picture->a, picture->width, picture->height, - 1, picture->a_stride); - } else { - int x, y; - const uint32_t* argb = picture->argb; - if (argb == NULL) return 0; - for (y = 0; y < picture->height; ++y) { - for (x = 0; x < picture->width; ++x) { - if (argb[x] < 0xff000000u) return 1; // test any alpha values != 0xff - } - argb += picture->argb_stride; - } - } - return 0; -} - -//------------------------------------------------------------------------------ -// RGB -> YUV conversion - -// TODO: we can do better than simply 2x2 averaging on U/V samples. -#define SUM4(ptr) ((ptr)[0] + (ptr)[step] + \ - (ptr)[rgb_stride] + (ptr)[rgb_stride + step]) -#define SUM2H(ptr) (2 * (ptr)[0] + 2 * (ptr)[step]) -#define SUM2V(ptr) (2 * (ptr)[0] + 2 * (ptr)[rgb_stride]) -#define SUM1(ptr) (4 * (ptr)[0]) -#define RGB_TO_UV(x, y, SUM) { \ - const int src = (2 * (step * (x) + (y) * rgb_stride)); \ - const int dst = (x) + (y) * picture->uv_stride; \ - const int r = SUM(r_ptr + src); \ - const int g = SUM(g_ptr + src); \ - const int b = SUM(b_ptr + src); \ - picture->u[dst] = VP8RGBToU(r, g, b); \ - picture->v[dst] = VP8RGBToV(r, g, b); \ -} - -#define RGB_TO_UV0(x_in, x_out, y, SUM) { \ - const int src = (step * (x_in) + (y) * rgb_stride); \ - const int dst = (x_out) + (y) * picture->uv0_stride; \ - const int r = SUM(r_ptr + src); \ - const int g = SUM(g_ptr + src); \ - const int b = SUM(b_ptr + src); \ - picture->u0[dst] = VP8RGBToU(r, g, b); \ - picture->v0[dst] = VP8RGBToV(r, g, b); \ -} - -static void MakeGray(WebPPicture* const picture) { - int y; - const int uv_width = HALVE(picture->width); - const int uv_height = HALVE(picture->height); - for (y = 0; y < uv_height; ++y) { - memset(picture->u + y * picture->uv_stride, 128, uv_width); - memset(picture->v + y * picture->uv_stride, 128, uv_width); - } -} - -static int ImportYUVAFromRGBA(const uint8_t* const r_ptr, - const uint8_t* const g_ptr, - const uint8_t* const b_ptr, - const uint8_t* const a_ptr, - int step, // bytes per pixel - int rgb_stride, // bytes per scanline - WebPPicture* const picture) { - const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; - int x, y; - const int width = picture->width; - const int height = picture->height; - const int has_alpha = CheckNonOpaque(a_ptr, width, height, step, rgb_stride); - - picture->colorspace = uv_csp; - picture->use_argb = 0; - if (has_alpha) { - picture->colorspace |= WEBP_CSP_ALPHA_BIT; - } - if (!WebPPictureAlloc(picture)) return 0; - - // Import luma plane - for (y = 0; y < height; ++y) { - for (x = 0; x < width; ++x) { - const int offset = step * x + y * rgb_stride; - picture->y[x + y * picture->y_stride] = - VP8RGBToY(r_ptr[offset], g_ptr[offset], b_ptr[offset]); - } - } - - // Downsample U/V plane - if (uv_csp != WEBP_YUV400) { - for (y = 0; y < (height >> 1); ++y) { - for (x = 0; x < (width >> 1); ++x) { - RGB_TO_UV(x, y, SUM4); - } - if (width & 1) { - RGB_TO_UV(x, y, SUM2V); - } - } - if (height & 1) { - for (x = 0; x < (width >> 1); ++x) { - RGB_TO_UV(x, y, SUM2H); - } - if (width & 1) { - RGB_TO_UV(x, y, SUM1); - } - } - -#ifdef WEBP_EXPERIMENTAL_FEATURES - // Store original U/V samples too - if (uv_csp == WEBP_YUV422) { - for (y = 0; y < height; ++y) { - for (x = 0; x < (width >> 1); ++x) { - RGB_TO_UV0(2 * x, x, y, SUM2H); - } - if (width & 1) { - RGB_TO_UV0(2 * x, x, y, SUM1); - } - } - } else if (uv_csp == WEBP_YUV444) { - for (y = 0; y < height; ++y) { - for (x = 0; x < width; ++x) { - RGB_TO_UV0(x, x, y, SUM1); - } - } - } -#endif - } else { - MakeGray(picture); - } - - if (has_alpha) { - assert(step >= 4); - for (y = 0; y < height; ++y) { - for (x = 0; x < width; ++x) { - picture->a[x + y * picture->a_stride] = - a_ptr[step * x + y * rgb_stride]; - } - } - } - return 1; -} - -static int Import(WebPPicture* const picture, - const uint8_t* const rgb, int rgb_stride, - int step, int swap_rb, int import_alpha) { - const uint8_t* const r_ptr = rgb + (swap_rb ? 2 : 0); - const uint8_t* const g_ptr = rgb + 1; - const uint8_t* const b_ptr = rgb + (swap_rb ? 0 : 2); - const uint8_t* const a_ptr = import_alpha ? rgb + 3 : NULL; - const int width = picture->width; - const int height = picture->height; - - if (!picture->use_argb) { - return ImportYUVAFromRGBA(r_ptr, g_ptr, b_ptr, a_ptr, step, rgb_stride, - picture); - } - if (import_alpha) { - picture->colorspace |= WEBP_CSP_ALPHA_BIT; - } else { - picture->colorspace &= ~WEBP_CSP_ALPHA_BIT; - } - if (!WebPPictureAlloc(picture)) return 0; - - if (!import_alpha) { - int x, y; - for (y = 0; y < height; ++y) { - for (x = 0; x < width; ++x) { - const int offset = step * x + y * rgb_stride; - const uint32_t argb = - 0xff000000u | - (r_ptr[offset] << 16) | - (g_ptr[offset] << 8) | - (b_ptr[offset]); - picture->argb[x + y * picture->argb_stride] = argb; - } - } - } else { - int x, y; - assert(step >= 4); - for (y = 0; y < height; ++y) { - for (x = 0; x < width; ++x) { - const int offset = step * x + y * rgb_stride; - const uint32_t argb = (a_ptr[offset] << 24) | - (r_ptr[offset] << 16) | - (g_ptr[offset] << 8) | - (b_ptr[offset]); - picture->argb[x + y * picture->argb_stride] = argb; - } - } - } - return 1; -} -#undef SUM4 -#undef SUM2V -#undef SUM2H -#undef SUM1 -#undef RGB_TO_UV - -int WebPPictureImportRGB(WebPPicture* picture, - const uint8_t* rgb, int rgb_stride) { - return Import(picture, rgb, rgb_stride, 3, 0, 0); -} - -int WebPPictureImportBGR(WebPPicture* picture, - const uint8_t* rgb, int rgb_stride) { - return Import(picture, rgb, rgb_stride, 3, 1, 0); -} - -int WebPPictureImportRGBA(WebPPicture* picture, - const uint8_t* rgba, int rgba_stride) { - return Import(picture, rgba, rgba_stride, 4, 0, 1); -} - -int WebPPictureImportBGRA(WebPPicture* picture, - const uint8_t* rgba, int rgba_stride) { - return Import(picture, rgba, rgba_stride, 4, 1, 1); -} - -int WebPPictureImportRGBX(WebPPicture* picture, - const uint8_t* rgba, int rgba_stride) { - return Import(picture, rgba, rgba_stride, 4, 0, 0); -} - -int WebPPictureImportBGRX(WebPPicture* picture, - const uint8_t* rgba, int rgba_stride) { - return Import(picture, rgba, rgba_stride, 4, 1, 0); -} - -//------------------------------------------------------------------------------ -// Automatic YUV <-> ARGB conversions. - -int WebPPictureYUVAToARGB(WebPPicture* picture) { - if (picture == NULL) return 0; - if (picture->memory_ == NULL || picture->y == NULL || - picture->u == NULL || picture->v == NULL) { - return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); - } - if ((picture->colorspace & WEBP_CSP_ALPHA_BIT) && picture->a == NULL) { - return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); - } - if ((picture->colorspace & WEBP_CSP_UV_MASK) != WEBP_YUV420) { - return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); - } - // Allocate a new argb buffer (discarding the previous one). - if (!PictureAllocARGB(picture)) return 0; - - // Convert - { - int y; - const int width = picture->width; - const int height = picture->height; - const int argb_stride = 4 * picture->argb_stride; - uint8_t* dst = (uint8_t*)picture->argb; - const uint8_t *cur_u = picture->u, *cur_v = picture->v, *cur_y = picture->y; - WebPUpsampleLinePairFunc upsample = WebPGetLinePairConverter(ALPHA_IS_LAST); - - // First row, with replicated top samples. - upsample(NULL, cur_y, cur_u, cur_v, cur_u, cur_v, NULL, dst, width); - cur_y += picture->y_stride; - dst += argb_stride; - // Center rows. - for (y = 1; y + 1 < height; y += 2) { - const uint8_t* const top_u = cur_u; - const uint8_t* const top_v = cur_v; - cur_u += picture->uv_stride; - cur_v += picture->uv_stride; - upsample(cur_y, cur_y + picture->y_stride, top_u, top_v, cur_u, cur_v, - dst, dst + argb_stride, width); - cur_y += 2 * picture->y_stride; - dst += 2 * argb_stride; - } - // Last row (if needed), with replicated bottom samples. - if (height > 1 && !(height & 1)) { - upsample(cur_y, NULL, cur_u, cur_v, cur_u, cur_v, dst, NULL, width); - } - // Insert alpha values if needed, in replacement for the default 0xff ones. - if (picture->colorspace & WEBP_CSP_ALPHA_BIT) { - for (y = 0; y < height; ++y) { - uint32_t* const dst = picture->argb + y * picture->argb_stride; - const uint8_t* const src = picture->a + y * picture->a_stride; - int x; - for (x = 0; x < width; ++x) { - dst[x] = (dst[x] & 0x00ffffffu) | (src[x] << 24); - } - } - } - } - return 1; -} - -int WebPPictureARGBToYUVA(WebPPicture* picture, WebPEncCSP colorspace) { - if (picture == NULL) return 0; - if (picture->argb == NULL) { - return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); - } else { - const uint8_t* const argb = (const uint8_t*)picture->argb; - const uint8_t* const r = ALPHA_IS_LAST ? argb + 2 : argb + 1; - const uint8_t* const g = ALPHA_IS_LAST ? argb + 1 : argb + 2; - const uint8_t* const b = ALPHA_IS_LAST ? argb + 0 : argb + 3; - const uint8_t* const a = ALPHA_IS_LAST ? argb + 3 : argb + 0; - // We work on a tmp copy of 'picture', because ImportYUVAFromRGBA() - // would be calling WebPPictureFree(picture) otherwise. - WebPPicture tmp = *picture; - PictureResetARGB(&tmp); // reset ARGB buffer so that it's not free()'d. - tmp.use_argb = 0; - tmp.colorspace = colorspace & WEBP_CSP_UV_MASK; - if (!ImportYUVAFromRGBA(r, g, b, a, 4, 4 * picture->argb_stride, &tmp)) { - return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); - } - // Copy back the YUV specs into 'picture'. - tmp.argb = picture->argb; - tmp.argb_stride = picture->argb_stride; - tmp.memory_argb_ = picture->memory_argb_; - *picture = tmp; +void WebPMemoryWriterClear(WebPMemoryWriter* writer) { + if (writer != NULL) { + WebPSafeFree(writer->mem); + writer->mem = NULL; + writer->size = 0; + writer->max_size = 0; } - return 1; -} - -//------------------------------------------------------------------------------ -// Helper: clean up fully transparent area to help compressibility. - -#define SIZE 8 -#define SIZE2 (SIZE / 2) -static int is_transparent_area(const uint8_t* ptr, int stride, int size) { - int y, x; - for (y = 0; y < size; ++y) { - for (x = 0; x < size; ++x) { - if (ptr[x]) { - return 0; - } - } - ptr += stride; - } - return 1; -} - -static WEBP_INLINE void flatten(uint8_t* ptr, int v, int stride, int size) { - int y; - for (y = 0; y < size; ++y) { - memset(ptr, v, size); - ptr += stride; - } -} - -void WebPCleanupTransparentArea(WebPPicture* pic) { - int x, y, w, h; - const uint8_t* a_ptr; - int values[3] = { 0 }; - - if (pic == NULL) return; - - a_ptr = pic->a; - if (a_ptr == NULL) return; // nothing to do - - w = pic->width / SIZE; - h = pic->height / SIZE; - for (y = 0; y < h; ++y) { - int need_reset = 1; - for (x = 0; x < w; ++x) { - const int off_a = (y * pic->a_stride + x) * SIZE; - const int off_y = (y * pic->y_stride + x) * SIZE; - const int off_uv = (y * pic->uv_stride + x) * SIZE2; - if (is_transparent_area(a_ptr + off_a, pic->a_stride, SIZE)) { - if (need_reset) { - values[0] = pic->y[off_y]; - values[1] = pic->u[off_uv]; - values[2] = pic->v[off_uv]; - need_reset = 0; - } - flatten(pic->y + off_y, values[0], pic->y_stride, SIZE); - flatten(pic->u + off_uv, values[1], pic->uv_stride, SIZE2); - flatten(pic->v + off_uv, values[2], pic->uv_stride, SIZE2); - } else { - need_reset = 1; - } - } - // ignore the left-overs on right/bottom - } -} - -#undef SIZE -#undef SIZE2 - - -//------------------------------------------------------------------------------ -// Distortion - -// Max value returned in case of exact similarity. -static const double kMinDistortion_dB = 99.; - -int WebPPictureDistortion(const WebPPicture* pic1, const WebPPicture* pic2, - int type, float result[5]) { - int c; - DistoStats stats[5]; - int has_alpha; - - if (pic1 == NULL || pic2 == NULL || - pic1->width != pic2->width || pic1->height != pic2->height || - pic1->y == NULL || pic2->y == NULL || - pic1->u == NULL || pic2->u == NULL || - pic1->v == NULL || pic2->v == NULL || - result == NULL) { - return 0; - } - // TODO(skal): provide distortion for ARGB too. - if (pic1->use_argb == 1 || pic1->use_argb != pic2->use_argb) { - return 0; - } - - has_alpha = !!(pic1->colorspace & WEBP_CSP_ALPHA_BIT); - if (has_alpha != !!(pic2->colorspace & WEBP_CSP_ALPHA_BIT) || - (has_alpha && (pic1->a == NULL || pic2->a == NULL))) { - return 0; - } - - memset(stats, 0, sizeof(stats)); - VP8SSIMAccumulatePlane(pic1->y, pic1->y_stride, - pic2->y, pic2->y_stride, - pic1->width, pic1->height, &stats[0]); - VP8SSIMAccumulatePlane(pic1->u, pic1->uv_stride, - pic2->u, pic2->uv_stride, - (pic1->width + 1) >> 1, (pic1->height + 1) >> 1, - &stats[1]); - VP8SSIMAccumulatePlane(pic1->v, pic1->uv_stride, - pic2->v, pic2->uv_stride, - (pic1->width + 1) >> 1, (pic1->height + 1) >> 1, - &stats[2]); - if (has_alpha) { - VP8SSIMAccumulatePlane(pic1->a, pic1->a_stride, - pic2->a, pic2->a_stride, - pic1->width, pic1->height, &stats[3]); - } - for (c = 0; c <= 4; ++c) { - if (type == 1) { - const double v = VP8SSIMGet(&stats[c]); - result[c] = (float)((v < 1.) ? -10.0 * log10(1. - v) - : kMinDistortion_dB); - } else { - const double v = VP8SSIMGetSquaredError(&stats[c]); - result[c] = (float)((v > 0.) ? -4.3429448 * log(v / (255 * 255.)) - : kMinDistortion_dB); - } - // Accumulate forward - if (c < 4) VP8SSIMAddStats(&stats[c], &stats[4]); - } - return 1; } //------------------------------------------------------------------------------ @@ -1000,7 +253,7 @@ static size_t Encode(const uint8_t* rgba, int width, int height, int stride, ok = import(&pic, rgba, stride) && WebPEncode(&config, &pic); WebPPictureFree(&pic); if (!ok) { - free(wrt.mem); + WebPMemoryWriterClear(&wrt); *output = NULL; return 0; } @@ -1014,10 +267,10 @@ size_t NAME(const uint8_t* in, int w, int h, int bps, float q, \ return Encode(in, w, h, bps, IMPORTER, q, 0, out); \ } -ENCODE_FUNC(WebPEncodeRGB, WebPPictureImportRGB); -ENCODE_FUNC(WebPEncodeBGR, WebPPictureImportBGR); -ENCODE_FUNC(WebPEncodeRGBA, WebPPictureImportRGBA); -ENCODE_FUNC(WebPEncodeBGRA, WebPPictureImportBGRA); +ENCODE_FUNC(WebPEncodeRGB, WebPPictureImportRGB) +ENCODE_FUNC(WebPEncodeBGR, WebPPictureImportBGR) +ENCODE_FUNC(WebPEncodeRGBA, WebPPictureImportRGBA) +ENCODE_FUNC(WebPEncodeBGRA, WebPPictureImportBGRA) #undef ENCODE_FUNC @@ -1027,15 +280,11 @@ size_t NAME(const uint8_t* in, int w, int h, int bps, uint8_t** out) { \ return Encode(in, w, h, bps, IMPORTER, LOSSLESS_DEFAULT_QUALITY, 1, out); \ } -LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGB, WebPPictureImportRGB); -LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGR, WebPPictureImportBGR); -LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGBA, WebPPictureImportRGBA); -LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGRA, WebPPictureImportBGRA); +LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGB, WebPPictureImportRGB) +LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGR, WebPPictureImportBGR) +LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGBA, WebPPictureImportRGBA) +LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGRA, WebPPictureImportBGRA) #undef LOSSLESS_ENCODE_FUNC //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/enc/quant.c b/drivers/webp/enc/quant.c index ea153849c8..002c326b82 100644 --- a/drivers/webp/enc/quant.c +++ b/drivers/webp/enc/quant.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Quantization @@ -11,6 +13,7 @@ #include <assert.h> #include <math.h> +#include <stdlib.h> // for abs() #include "./vp8enci.h" #include "./cost.h" @@ -22,16 +25,78 @@ #define MID_ALPHA 64 // neutral value for susceptibility #define MIN_ALPHA 30 // lowest usable value for susceptibility -#define MAX_ALPHA 100 // higher meaninful value for susceptibility +#define MAX_ALPHA 100 // higher meaningful value for susceptibility #define SNS_TO_DQ 0.9 // Scaling constant between the sns value and the QP // power-law modulation. Must be strictly less than 1. +#define I4_PENALTY 4000 // Rate-penalty for quick i4/i16 decision + +// number of non-zero coeffs below which we consider the block very flat +// (and apply a penalty to complex predictions) +#define FLATNESS_LIMIT_I16 10 // I16 mode +#define FLATNESS_LIMIT_I4 3 // I4 mode +#define FLATNESS_LIMIT_UV 2 // UV mode +#define FLATNESS_PENALTY 140 // roughly ~1bit per block + #define MULT_8B(a, b) (((a) * (b) + 128) >> 8) -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +// #define DEBUG_BLOCK + +//------------------------------------------------------------------------------ + +#if defined(DEBUG_BLOCK) + +#include <stdio.h> +#include <stdlib.h> + +static void PrintBlockInfo(const VP8EncIterator* const it, + const VP8ModeScore* const rd) { + int i, j; + const int is_i16 = (it->mb_->type_ == 1); + printf("SOURCE / OUTPUT / ABS DELTA\n"); + for (j = 0; j < 24; ++j) { + if (j == 16) printf("\n"); // newline before the U/V block + for (i = 0; i < 16; ++i) printf("%3d ", it->yuv_in_[i + j * BPS]); + printf(" "); + for (i = 0; i < 16; ++i) printf("%3d ", it->yuv_out_[i + j * BPS]); + printf(" "); + for (i = 0; i < 16; ++i) { + printf("%1d ", abs(it->yuv_out_[i + j * BPS] - it->yuv_in_[i + j * BPS])); + } + printf("\n"); + } + printf("\nD:%d SD:%d R:%d H:%d nz:0x%x score:%d\n", + (int)rd->D, (int)rd->SD, (int)rd->R, (int)rd->H, (int)rd->nz, + (int)rd->score); + if (is_i16) { + printf("Mode: %d\n", rd->mode_i16); + printf("y_dc_levels:"); + for (i = 0; i < 16; ++i) printf("%3d ", rd->y_dc_levels[i]); + printf("\n"); + } else { + printf("Modes[16]: "); + for (i = 0; i < 16; ++i) printf("%d ", rd->modes_i4[i]); + printf("\n"); + } + printf("y_ac_levels:\n"); + for (j = 0; j < 16; ++j) { + for (i = is_i16 ? 1 : 0; i < 16; ++i) { + printf("%4d ", rd->y_ac_levels[j][i]); + } + printf("\n"); + } + printf("\n"); + printf("uv_levels (mode=%d):\n", rd->mode_uv); + for (j = 0; j < 8; ++j) { + for (i = 0; i < 16; ++i) { + printf("%4d ", rd->uv_levels[j][i]); + } + printf("\n"); + } +} + +#endif // DEBUG_BLOCK //------------------------------------------------------------------------------ @@ -100,31 +165,13 @@ static const uint16_t kAcTable2[128] = { 385, 393, 401, 409, 416, 424, 432, 440 }; -static const uint16_t kCoeffThresh[16] = { - 0, 10, 20, 30, - 10, 20, 30, 30, - 20, 30, 30, 30, - 30, 30, 30, 30 -}; - -// TODO(skal): tune more. Coeff thresholding? -static const uint8_t kBiasMatrices[3][16] = { // [3] = [luma-ac,luma-dc,chroma] - { 96, 96, 96, 96, - 96, 96, 96, 96, - 96, 96, 96, 96, - 96, 96, 96, 96 }, - { 96, 96, 96, 96, - 96, 96, 96, 96, - 96, 96, 96, 96, - 96, 96, 96, 96 }, - { 96, 96, 96, 96, - 96, 96, 96, 96, - 96, 96, 96, 96, - 96, 96, 96, 96 } +static const uint8_t kBiasMatrices[3][2] = { // [luma-ac,luma-dc,chroma][dc,ac] + { 96, 110 }, { 96, 108 }, { 110, 115 } }; -// Sharpening by (slightly) raising the hi-frequency coeffs (only for trellis). +// Sharpening by (slightly) raising the hi-frequency coeffs. // Hack-ish but helpful for mid-bitrate range. Use with care. +#define SHARPEN_BITS 11 // number of descaling bits for sharpening bias static const uint8_t kFreqSharpening[16] = { 0, 30, 60, 90, 30, 60, 90, 90, @@ -137,20 +184,30 @@ static const uint8_t kFreqSharpening[16] = { // Returns the average quantizer static int ExpandMatrix(VP8Matrix* const m, int type) { - int i; - int sum = 0; + int i, sum; + for (i = 0; i < 2; ++i) { + const int is_ac_coeff = (i > 0); + const int bias = kBiasMatrices[type][is_ac_coeff]; + m->iq_[i] = (1 << QFIX) / m->q_[i]; + m->bias_[i] = BIAS(bias); + // zthresh_ is the exact value such that QUANTDIV(coeff, iQ, B) is: + // * zero if coeff <= zthresh + // * non-zero if coeff > zthresh + m->zthresh_[i] = ((1 << QFIX) - 1 - m->bias_[i]) / m->iq_[i]; + } for (i = 2; i < 16; ++i) { m->q_[i] = m->q_[1]; + m->iq_[i] = m->iq_[1]; + m->bias_[i] = m->bias_[1]; + m->zthresh_[i] = m->zthresh_[1]; } - for (i = 0; i < 16; ++i) { - const int j = kZigzag[i]; - const int bias = kBiasMatrices[type][j]; - m->iq_[j] = (1 << QFIX) / m->q_[j]; - m->bias_[j] = BIAS(bias); - // TODO(skal): tune kCoeffThresh[] - m->zthresh_[j] = ((256 /*+ kCoeffThresh[j]*/ - bias) * m->q_[j] + 127) >> 8; - m->sharpen_[j] = (kFreqSharpening[j] * m->q_[j]) >> 11; - sum += m->q_[j]; + for (sum = 0, i = 0; i < 16; ++i) { + if (type == 0) { // we only use sharpening for AC luma coeffs + m->sharpen_[i] = (kFreqSharpening[i] * m->q_[i]) >> SHARPEN_BITS; + } else { + m->sharpen_[i] = 0; + } + sum += m->q_[i]; } return (sum + 8) >> 4; } @@ -178,17 +235,17 @@ static void SetupMatrices(VP8Encoder* enc) { q16 = ExpandMatrix(&m->y2_, 1); quv = ExpandMatrix(&m->uv_, 2); - // TODO: Switch to kLambda*[] tables? - { - m->lambda_i4_ = (3 * q4 * q4) >> 7; - m->lambda_i16_ = (3 * q16 * q16); - m->lambda_uv_ = (3 * quv * quv) >> 6; - m->lambda_mode_ = (1 * q4 * q4) >> 7; - m->lambda_trellis_i4_ = (7 * q4 * q4) >> 3; - m->lambda_trellis_i16_ = (q16 * q16) >> 2; - m->lambda_trellis_uv_ = (quv *quv) << 1; - m->tlambda_ = (tlambda_scale * q4) >> 5; - } + m->lambda_i4_ = (3 * q4 * q4) >> 7; + m->lambda_i16_ = (3 * q16 * q16); + m->lambda_uv_ = (3 * quv * quv) >> 6; + m->lambda_mode_ = (1 * q4 * q4) >> 7; + m->lambda_trellis_i4_ = (7 * q4 * q4) >> 3; + m->lambda_trellis_i16_ = (q16 * q16) >> 2; + m->lambda_trellis_uv_ = (quv *quv) << 1; + m->tlambda_ = (tlambda_scale * q4) >> 5; + + m->min_disto_ = 10 * m->y1_.q_[0]; // quantization-aware min disto + m->max_edge_ = 0; } } @@ -197,16 +254,21 @@ static void SetupMatrices(VP8Encoder* enc) { // Very small filter-strength values have close to no visual effect. So we can // save a little decoding-CPU by turning filtering off for these. -#define FSTRENGTH_CUTOFF 3 +#define FSTRENGTH_CUTOFF 2 static void SetupFilterStrength(VP8Encoder* const enc) { int i; - const int level0 = enc->config_->filter_strength; + // level0 is in [0..500]. Using '-f 50' as filter_strength is mid-filtering. + const int level0 = 5 * enc->config_->filter_strength; for (i = 0; i < NUM_MB_SEGMENTS; ++i) { - // Segments with lower quantizer will be less filtered. TODO: tune (wrt SNS) - const int level = level0 * 256 * enc->dqm_[i].quant_ / 128; - const int f = level / (256 + enc->dqm_[i].beta_); - enc->dqm_[i].fstrength_ = (f < FSTRENGTH_CUTOFF) ? 0 : (f > 63) ? 63 : f; + VP8SegmentInfo* const m = &enc->dqm_[i]; + // We focus on the quantization of AC coeffs. + const int qstep = kAcTable[clip(m->quant_, 0, 127)] >> 2; + const int base_strength = + VP8FilterStrengthFromDelta(enc->filter_hdr_.sharpness_, qstep); + // Segments with lower complexity ('beta') will be less filtered. + const int f = base_strength * level0 / (256 + m->beta_); + m->fstrength_ = (f < FSTRENGTH_CUTOFF) ? 0 : (f > 63) ? 63 : f; } // We record the initial strength (mainly for the case of 1-segment only). enc->filter_hdr_.level_ = enc->dqm_[0].fstrength_; @@ -224,28 +286,90 @@ static void SetupFilterStrength(VP8Encoder* const enc) { // We want to emulate jpeg-like behaviour where the expected "good" quality // is around q=75. Internally, our "good" middle is around c=50. So we // map accordingly using linear piece-wise function -static double QualityToCompression(double q) { - const double c = q / 100.; - return (c < 0.75) ? c * (2. / 3.) : 2. * c - 1.; +static double QualityToCompression(double c) { + const double linear_c = (c < 0.75) ? c * (2. / 3.) : 2. * c - 1.; + // The file size roughly scales as pow(quantizer, 3.). Actually, the + // exponent is somewhere between 2.8 and 3.2, but we're mostly interested + // in the mid-quant range. So we scale the compressibility inversely to + // this power-law: quant ~= compression ^ 1/3. This law holds well for + // low quant. Finer modeling for high-quant would make use of kAcTable[] + // more explicitly. + const double v = pow(linear_c, 1 / 3.); + return v; +} + +static double QualityToJPEGCompression(double c, double alpha) { + // We map the complexity 'alpha' and quality setting 'c' to a compression + // exponent empirically matched to the compression curve of libjpeg6b. + // On average, the WebP output size will be roughly similar to that of a + // JPEG file compressed with same quality factor. + const double amin = 0.30; + const double amax = 0.85; + const double exp_min = 0.4; + const double exp_max = 0.9; + const double slope = (exp_min - exp_max) / (amax - amin); + // Linearly interpolate 'expn' from exp_min to exp_max + // in the [amin, amax] range. + const double expn = (alpha > amax) ? exp_min + : (alpha < amin) ? exp_max + : exp_max + slope * (alpha - amin); + const double v = pow(c, expn); + return v; +} + +static int SegmentsAreEquivalent(const VP8SegmentInfo* const S1, + const VP8SegmentInfo* const S2) { + return (S1->quant_ == S2->quant_) && (S1->fstrength_ == S2->fstrength_); +} + +static void SimplifySegments(VP8Encoder* const enc) { + int map[NUM_MB_SEGMENTS] = { 0, 1, 2, 3 }; + const int num_segments = enc->segment_hdr_.num_segments_; + int num_final_segments = 1; + int s1, s2; + for (s1 = 1; s1 < num_segments; ++s1) { // find similar segments + const VP8SegmentInfo* const S1 = &enc->dqm_[s1]; + int found = 0; + // check if we already have similar segment + for (s2 = 0; s2 < num_final_segments; ++s2) { + const VP8SegmentInfo* const S2 = &enc->dqm_[s2]; + if (SegmentsAreEquivalent(S1, S2)) { + found = 1; + break; + } + } + map[s1] = s2; + if (!found) { + if (num_final_segments != s1) { + enc->dqm_[num_final_segments] = enc->dqm_[s1]; + } + ++num_final_segments; + } + } + if (num_final_segments < num_segments) { // Remap + int i = enc->mb_w_ * enc->mb_h_; + while (i-- > 0) enc->mb_info_[i].segment_ = map[enc->mb_info_[i].segment_]; + enc->segment_hdr_.num_segments_ = num_final_segments; + // Replicate the trailing segment infos (it's mostly cosmetics) + for (i = num_final_segments; i < num_segments; ++i) { + enc->dqm_[i] = enc->dqm_[num_final_segments - 1]; + } + } } void VP8SetSegmentParams(VP8Encoder* const enc, float quality) { int i; int dq_uv_ac, dq_uv_dc; - const int num_segments = enc->config_->segments; + const int num_segments = enc->segment_hdr_.num_segments_; const double amp = SNS_TO_DQ * enc->config_->sns_strength / 100. / 128.; - const double c_base = QualityToCompression(quality); + const double Q = quality / 100.; + const double c_base = enc->config_->emulate_jpeg_size ? + QualityToJPEGCompression(Q, enc->alpha_ / 255.) : + QualityToCompression(Q); for (i = 0; i < num_segments; ++i) { - // The file size roughly scales as pow(quantizer, 3.). Actually, the - // exponent is somewhere between 2.8 and 3.2, but we're mostly interested - // in the mid-quant range. So we scale the compressibility inversely to - // this power-law: quant ~= compression ^ 1/3. This law holds well for - // low quant. Finer modelling for high-quant would make use of kAcTable[] - // more explicitely. - // Additionally, we modulate the base exponent 1/3 to accommodate for the - // quantization susceptibility and allow denser segments to be quantized - // more. - const double expn = (1. - amp * enc->dqm_[i].alpha_) / 3.; + // We modulate the base coefficient to accommodate for the quantization + // susceptibility and allow denser segments to be quantized more. + const double expn = 1. - amp * enc->dqm_[i].alpha_; const double c = pow(c_base, expn); const int q = (int)(127. * (1. - c)); assert(expn > 0.); @@ -271,7 +395,7 @@ void VP8SetSegmentParams(VP8Encoder* const enc, float quality) { dq_uv_ac = clip(dq_uv_ac, MIN_DQ_UV, MAX_DQ_UV); // We also boost the dc-uv-quant a little, based on sns-strength, since // U/V channels are quite more reactive to high quants (flat DC-blocks - // tend to appear, and are displeasant). + // tend to appear, and are unpleasant). dq_uv_dc = -4 * enc->config_->sns_strength / 100; dq_uv_dc = clip(dq_uv_dc, -15, 15); // 4bit-signed max allowed @@ -281,9 +405,11 @@ void VP8SetSegmentParams(VP8Encoder* const enc, float quality) { enc->dq_uv_dc_ = dq_uv_dc; enc->dq_uv_ac_ = dq_uv_ac; - SetupMatrices(enc); - SetupFilterStrength(enc); // initialize segments' filtering, eventually + + if (num_segments > 1) SimplifySegments(enc); + + SetupMatrices(enc); // finalize quantization matrices } //------------------------------------------------------------------------------ @@ -299,16 +425,14 @@ const int VP8I4ModeOffsets[NUM_BMODES] = { }; void VP8MakeLuma16Preds(const VP8EncIterator* const it) { - const VP8Encoder* const enc = it->enc_; - const uint8_t* const left = it->x_ ? enc->y_left_ : NULL; - const uint8_t* const top = it->y_ ? enc->y_top_ + it->x_ * 16 : NULL; + const uint8_t* const left = it->x_ ? it->y_left_ : NULL; + const uint8_t* const top = it->y_ ? it->y_top_ : NULL; VP8EncPredLuma16(it->yuv_p_, left, top); } void VP8MakeChroma8Preds(const VP8EncIterator* const it) { - const VP8Encoder* const enc = it->enc_; - const uint8_t* const left = it->x_ ? enc->u_left_ : NULL; - const uint8_t* const top = it->y_ ? enc->uv_top_ + it->x_ * 16 : NULL; + const uint8_t* const left = it->x_ ? it->u_left_ : NULL; + const uint8_t* const top = it->y_ ? it->uv_top_ : NULL; VP8EncPredChroma8(it->yuv_p_, left, top); } @@ -320,23 +444,21 @@ void VP8MakeIntra4Preds(const VP8EncIterator* const it) { // Quantize // Layout: -// +----+ -// |YYYY| 0 -// |YYYY| 4 -// |YYYY| 8 -// |YYYY| 12 -// +----+ -// |UUVV| 16 -// |UUVV| 20 -// +----+ - -const int VP8Scan[16 + 4 + 4] = { - // Luma +// +----+----+ +// |YYYY|UUVV| 0 +// |YYYY|UUVV| 4 +// |YYYY|....| 8 +// |YYYY|....| 12 +// +----+----+ + +const int VP8Scan[16] = { // Luma 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS, 0 + 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS, 0 + 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS, 0 + 12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS, +}; +static const int VP8ScanUV[4 + 4] = { 0 + 0 * BPS, 4 + 0 * BPS, 0 + 4 * BPS, 4 + 4 * BPS, // U 8 + 0 * BPS, 12 + 0 * BPS, 8 + 4 * BPS, 12 + 4 * BPS // V }; @@ -364,6 +486,7 @@ static void InitScore(VP8ModeScore* const rd) { rd->D = 0; rd->SD = 0; rd->R = 0; + rd->H = 0; rd->nz = 0; rd->score = MAX_COST; } @@ -372,6 +495,7 @@ static void CopyScore(VP8ModeScore* const dst, const VP8ModeScore* const src) { dst->D = src->D; dst->SD = src->SD; dst->R = src->R; + dst->H = src->H; dst->nz = src->nz; // note that nz is not accumulated, but just copied. dst->score = src->score; } @@ -380,6 +504,7 @@ static void AddScore(VP8ModeScore* const dst, const VP8ModeScore* const src) { dst->D += src->D; dst->SD += src->SD; dst->R += src->R; + dst->H += src->H; dst->nz |= src->nz; // here, new nz bits are accumulated. dst->score += src->score; } @@ -387,28 +512,31 @@ static void AddScore(VP8ModeScore* const dst, const VP8ModeScore* const src) { //------------------------------------------------------------------------------ // Performs trellis-optimized quantization. -// Trellis - +// Trellis node typedef struct { - int prev; // best previous - int level; // level - int sign; // sign of coeff_i - score_t cost; // bit cost - score_t error; // distortion = sum of (|coeff_i| - level_i * Q_i)^2 - int ctx; // context (only depends on 'level'. Could be spared.) + int8_t prev; // best previous node + int8_t sign; // sign of coeff_i + int16_t level; // level } Node; +// Score state +typedef struct { + score_t score; // partial RD score + const uint16_t* costs; // shortcut to cost tables +} ScoreState; + // If a coefficient was quantized to a value Q (using a neutral bias), // we test all alternate possibilities between [Q-MIN_DELTA, Q+MAX_DELTA] // We don't test negative values though. #define MIN_DELTA 0 // how much lower level to try #define MAX_DELTA 1 // how much higher #define NUM_NODES (MIN_DELTA + 1 + MAX_DELTA) -#define NODE(n, l) (nodes[(n) + 1][(l) + MIN_DELTA]) +#define NODE(n, l) (nodes[(n)][(l) + MIN_DELTA]) +#define SCORE_STATE(n, l) (score_states[n][(l) + MIN_DELTA]) static WEBP_INLINE void SetRDScore(int lambda, VP8ModeScore* const rd) { // TODO: incorporate the "* 256" in the tables? - rd->score = rd->R * lambda + 256 * (rd->D + rd->SD); + rd->score = (rd->R + rd->H) * lambda + 256 * (rd->D + rd->SD); } static WEBP_INLINE score_t RDScoreTrellis(int lambda, score_t rate, @@ -416,34 +544,37 @@ static WEBP_INLINE score_t RDScoreTrellis(int lambda, score_t rate, return rate * lambda + 256 * distortion; } -static int TrellisQuantizeBlock(const VP8EncIterator* const it, +static int TrellisQuantizeBlock(const VP8Encoder* const enc, int16_t in[16], int16_t out[16], int ctx0, int coeff_type, const VP8Matrix* const mtx, int lambda) { - ProbaArray* const last_costs = it->enc_->proba_.coeffs_[coeff_type]; - CostArray* const costs = it->enc_->proba_.level_cost_[coeff_type]; + const ProbaArray* const probas = enc->proba_.coeffs_[coeff_type]; + CostArrayPtr const costs = + (CostArrayPtr)enc->proba_.remapped_costs_[coeff_type]; const int first = (coeff_type == 0) ? 1 : 0; - Node nodes[17][NUM_NODES]; + Node nodes[16][NUM_NODES]; + ScoreState score_states[2][NUM_NODES]; + ScoreState* ss_cur = &SCORE_STATE(0, MIN_DELTA); + ScoreState* ss_prev = &SCORE_STATE(1, MIN_DELTA); int best_path[3] = {-1, -1, -1}; // store best-last/best-level/best-previous score_t best_score; - int best_node; - int last = first - 1; - int n, m, p, nz; + int n, m, p, last; { score_t cost; - score_t max_error; const int thresh = mtx->q_[1] * mtx->q_[1] / 4; - const int last_proba = last_costs[VP8EncBands[first]][ctx0][0]; + const int last_proba = probas[VP8EncBands[first]][ctx0][0]; - // compute maximal distortion. - max_error = 0; - for (n = first; n < 16; ++n) { - const int j = kZigzag[n]; + // compute the position of the last interesting coefficient + last = first - 1; + for (n = 15; n >= first; --n) { + const int j = kZigzag[n]; const int err = in[j] * in[j]; - max_error += kWeightTrellis[j] * err; - if (err > thresh) last = n; + if (err > thresh) { + last = n; + break; + } } // we don't need to go inspect up to n = 16 coeffs. We can just go up // to last + 1 (inclusive) without losing much. @@ -451,93 +582,95 @@ static int TrellisQuantizeBlock(const VP8EncIterator* const it, // compute 'skip' score. This is the max score one can do. cost = VP8BitCost(0, last_proba); - best_score = RDScoreTrellis(lambda, cost, max_error); + best_score = RDScoreTrellis(lambda, cost, 0); // initialize source node. - n = first - 1; for (m = -MIN_DELTA; m <= MAX_DELTA; ++m) { - NODE(n, m).cost = 0; - NODE(n, m).error = max_error; - NODE(n, m).ctx = ctx0; + const score_t rate = (ctx0 == 0) ? VP8BitCost(1, last_proba) : 0; + ss_cur[m].score = RDScoreTrellis(lambda, rate, 0); + ss_cur[m].costs = costs[first][ctx0]; } } // traverse trellis. for (n = first; n <= last; ++n) { - const int j = kZigzag[n]; - const int Q = mtx->q_[j]; - const int iQ = mtx->iq_[j]; - const int B = BIAS(0x00); // neutral bias + const int j = kZigzag[n]; + const uint32_t Q = mtx->q_[j]; + const uint32_t iQ = mtx->iq_[j]; + const uint32_t B = BIAS(0x00); // neutral bias // note: it's important to take sign of the _original_ coeff, // so we don't have to consider level < 0 afterward. const int sign = (in[j] < 0); - int coeff0 = (sign ? -in[j] : in[j]) + mtx->sharpen_[j]; - int level0; - if (coeff0 > 2047) coeff0 = 2047; + const uint32_t coeff0 = (sign ? -in[j] : in[j]) + mtx->sharpen_[j]; + int level0 = QUANTDIV(coeff0, iQ, B); + if (level0 > MAX_LEVEL) level0 = MAX_LEVEL; + + { // Swap current and previous score states + ScoreState* const tmp = ss_cur; + ss_cur = ss_prev; + ss_prev = tmp; + } - level0 = QUANTDIV(coeff0, iQ, B); // test all alternate level values around level0. for (m = -MIN_DELTA; m <= MAX_DELTA; ++m) { Node* const cur = &NODE(n, m); - int delta_error, new_error; - score_t cur_score = MAX_COST; int level = level0 + m; - int last_proba; - - cur->sign = sign; - cur->level = level; - cur->ctx = (level == 0) ? 0 : (level == 1) ? 1 : 2; - if (level >= 2048 || level < 0) { // node is dead? - cur->cost = MAX_COST; + const int ctx = (level > 2) ? 2 : level; + const int band = VP8EncBands[n + 1]; + score_t base_score, last_pos_score; + score_t best_cur_score = MAX_COST; + int best_prev = 0; // default, in case + + ss_cur[m].score = MAX_COST; + ss_cur[m].costs = costs[n + 1][ctx]; + if (level > MAX_LEVEL || level < 0) { // node is dead? continue; } - last_proba = last_costs[VP8EncBands[n + 1]][cur->ctx][0]; - // Compute delta_error = how much coding this level will - // subtract as distortion to max_error - new_error = coeff0 - level * Q; - delta_error = - kWeightTrellis[j] * (coeff0 * coeff0 - new_error * new_error); + // Compute extra rate cost if last coeff's position is < 15 + { + const score_t last_pos_cost = + (n < 15) ? VP8BitCost(0, probas[band][ctx][0]) : 0; + last_pos_score = RDScoreTrellis(lambda, last_pos_cost, 0); + } + + { + // Compute delta_error = how much coding this level will + // subtract to max_error as distortion. + // Here, distortion = sum of (|coeff_i| - level_i * Q_i)^2 + const int new_error = coeff0 - level * Q; + const int delta_error = + kWeightTrellis[j] * (new_error * new_error - coeff0 * coeff0); + base_score = RDScoreTrellis(lambda, 0, delta_error); + } // Inspect all possible non-dead predecessors. Retain only the best one. for (p = -MIN_DELTA; p <= MAX_DELTA; ++p) { - const Node* const prev = &NODE(n - 1, p); - const int prev_ctx = prev->ctx; - const uint16_t* const tcost = costs[VP8EncBands[n]][prev_ctx]; - const score_t total_error = prev->error - delta_error; - score_t cost, base_cost, score; - - if (prev->cost >= MAX_COST) { // dead node? - continue; - } - - // Base cost of both terminal/non-terminal - base_cost = prev->cost + VP8LevelCost(tcost, level); - + // Dead nodes (with ss_prev[p].score >= MAX_COST) are automatically + // eliminated since their score can't be better than the current best. + const score_t cost = VP8LevelCost(ss_prev[p].costs, level); // Examine node assuming it's a non-terminal one. - cost = base_cost; - if (level && n < 15) { - cost += VP8BitCost(1, last_proba); + const score_t score = + base_score + ss_prev[p].score + RDScoreTrellis(lambda, cost, 0); + if (score < best_cur_score) { + best_cur_score = score; + best_prev = p; } - score = RDScoreTrellis(lambda, cost, total_error); - if (score < cur_score) { - cur_score = score; - cur->cost = cost; - cur->error = total_error; - cur->prev = p; - } - - // Now, record best terminal node (and thus best entry in the graph). - if (level) { - cost = base_cost; - if (n < 15) cost += VP8BitCost(0, last_proba); - score = RDScoreTrellis(lambda, cost, total_error); - if (score < best_score) { - best_score = score; - best_path[0] = n; // best eob position - best_path[1] = m; // best level - best_path[2] = p; // best predecessor - } + } + // Store best finding in current node. + cur->sign = sign; + cur->level = level; + cur->prev = best_prev; + ss_cur[m].score = best_cur_score; + + // Now, record best terminal node (and thus best entry in the graph). + if (level != 0) { + const score_t score = best_cur_score + last_pos_score; + if (score < best_score) { + best_score = score; + best_path[0] = n; // best eob position + best_path[1] = m; // best node index + best_path[2] = best_prev; // best predecessor } } } @@ -550,23 +683,25 @@ static int TrellisQuantizeBlock(const VP8EncIterator* const it, return 0; // skip! } - // Unwind the best path. - // Note: best-prev on terminal node is not necessarily equal to the - // best_prev for non-terminal. So we patch best_path[2] in. - n = best_path[0]; - best_node = best_path[1]; - NODE(n, best_node).prev = best_path[2]; // force best-prev for terminal - nz = 0; - - for (; n >= first; --n) { - const Node* const node = &NODE(n, best_node); - const int j = kZigzag[n]; - out[n] = node->sign ? -node->level : node->level; - nz |= (node->level != 0); - in[j] = out[n] * mtx->q_[j]; - best_node = node->prev; + { + // Unwind the best path. + // Note: best-prev on terminal node is not necessarily equal to the + // best_prev for non-terminal. So we patch best_path[2] in. + int nz = 0; + int best_node = best_path[1]; + n = best_path[0]; + NODE(n, best_node).prev = best_path[2]; // force best-prev for terminal + + for (; n >= first; --n) { + const Node* const node = &NODE(n, best_node); + const int j = kZigzag[n]; + out[n] = node->sign ? -node->level : node->level; + nz |= node->level; + in[j] = out[n] * mtx->q_[j]; + best_node = node->prev; + } + return (nz != 0); } - return nz; } #undef NODE @@ -582,17 +717,17 @@ static int ReconstructIntra16(VP8EncIterator* const it, int mode) { const VP8Encoder* const enc = it->enc_; const uint8_t* const ref = it->yuv_p_ + VP8I16ModeOffsets[mode]; - const uint8_t* const src = it->yuv_in_ + Y_OFF; + const uint8_t* const src = it->yuv_in_ + Y_OFF_ENC; const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; int nz = 0; int n; int16_t tmp[16][16], dc_tmp[16]; - for (n = 0; n < 16; ++n) { - VP8FTransform(src + VP8Scan[n], ref + VP8Scan[n], tmp[n]); + for (n = 0; n < 16; n += 2) { + VP8FTransform2(src + VP8Scan[n], ref + VP8Scan[n], tmp[n]); } VP8FTransformWHT(tmp[0], dc_tmp); - nz |= VP8EncQuantizeBlock(dc_tmp, rd->y_dc_levels, 0, &dqm->y2_) << 24; + nz |= VP8EncQuantizeBlockWHT(dc_tmp, rd->y_dc_levels, &dqm->y2_) << 24; if (DO_TRELLIS_I16 && it->do_trellis_) { int x, y; @@ -601,20 +736,26 @@ static int ReconstructIntra16(VP8EncIterator* const it, for (x = 0; x < 4; ++x, ++n) { const int ctx = it->top_nz_[x] + it->left_nz_[y]; const int non_zero = - TrellisQuantizeBlock(it, tmp[n], rd->y_ac_levels[n], ctx, 0, - &dqm->y1_, dqm->lambda_trellis_i16_); + TrellisQuantizeBlock(enc, tmp[n], rd->y_ac_levels[n], ctx, 0, + &dqm->y1_, dqm->lambda_trellis_i16_); it->top_nz_[x] = it->left_nz_[y] = non_zero; + rd->y_ac_levels[n][0] = 0; nz |= non_zero << n; } } } else { - for (n = 0; n < 16; ++n) { - nz |= VP8EncQuantizeBlock(tmp[n], rd->y_ac_levels[n], 1, &dqm->y1_) << n; + for (n = 0; n < 16; n += 2) { + // Zero-out the first coeff, so that: a) nz is correct below, and + // b) finding 'last' non-zero coeffs in SetResidualCoeffs() is simplified. + tmp[n][0] = tmp[n + 1][0] = 0; + nz |= VP8EncQuantize2Blocks(tmp[n], rd->y_ac_levels[n], &dqm->y1_) << n; + assert(rd->y_ac_levels[n + 0][0] == 0); + assert(rd->y_ac_levels[n + 1][0] == 0); } } // Transform back - VP8ITransformWHT(dc_tmp, tmp[0]); + VP8TransformWHT(dc_tmp, tmp[0]); for (n = 0; n < 16; n += 2) { VP8ITransform(ref + VP8Scan[n], tmp[n], yuv_out + VP8Scan[n], 1); } @@ -637,10 +778,10 @@ static int ReconstructIntra4(VP8EncIterator* const it, if (DO_TRELLIS_I4 && it->do_trellis_) { const int x = it->i4_ & 3, y = it->i4_ >> 2; const int ctx = it->top_nz_[x] + it->left_nz_[y]; - nz = TrellisQuantizeBlock(it, tmp, levels, ctx, 3, &dqm->y1_, + nz = TrellisQuantizeBlock(enc, tmp, levels, ctx, 3, &dqm->y1_, dqm->lambda_trellis_i4_); } else { - nz = VP8EncQuantizeBlock(tmp, levels, 0, &dqm->y1_); + nz = VP8EncQuantizeBlock(tmp, levels, &dqm->y1_); } VP8ITransform(ref, tmp, yuv_out, 0); return nz; @@ -650,14 +791,14 @@ static int ReconstructUV(VP8EncIterator* const it, VP8ModeScore* const rd, uint8_t* const yuv_out, int mode) { const VP8Encoder* const enc = it->enc_; const uint8_t* const ref = it->yuv_p_ + VP8UVModeOffsets[mode]; - const uint8_t* const src = it->yuv_in_ + U_OFF; + const uint8_t* const src = it->yuv_in_ + U_OFF_ENC; const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; int nz = 0; int n; int16_t tmp[8][16]; - for (n = 0; n < 8; ++n) { - VP8FTransform(src + VP8Scan[16 + n], ref + VP8Scan[16 + n], tmp[n]); + for (n = 0; n < 8; n += 2) { + VP8FTransform2(src + VP8ScanUV[n], ref + VP8ScanUV[n], tmp[n]); } if (DO_TRELLIS_UV && it->do_trellis_) { int ch, x, y; @@ -666,28 +807,45 @@ static int ReconstructUV(VP8EncIterator* const it, VP8ModeScore* const rd, for (x = 0; x < 2; ++x, ++n) { const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; const int non_zero = - TrellisQuantizeBlock(it, tmp[n], rd->uv_levels[n], ctx, 2, - &dqm->uv_, dqm->lambda_trellis_uv_); + TrellisQuantizeBlock(enc, tmp[n], rd->uv_levels[n], ctx, 2, + &dqm->uv_, dqm->lambda_trellis_uv_); it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = non_zero; nz |= non_zero << n; } } } } else { - for (n = 0; n < 8; ++n) { - nz |= VP8EncQuantizeBlock(tmp[n], rd->uv_levels[n], 0, &dqm->uv_) << n; + for (n = 0; n < 8; n += 2) { + nz |= VP8EncQuantize2Blocks(tmp[n], rd->uv_levels[n], &dqm->uv_) << n; } } for (n = 0; n < 8; n += 2) { - VP8ITransform(ref + VP8Scan[16 + n], tmp[n], yuv_out + VP8Scan[16 + n], 1); + VP8ITransform(ref + VP8ScanUV[n], tmp[n], yuv_out + VP8ScanUV[n], 1); } return (nz << 16); } //------------------------------------------------------------------------------ // RD-opt decision. Reconstruct each modes, evalue distortion and bit-cost. -// Pick the mode is lower RD-cost = Rate + lamba * Distortion. +// Pick the mode is lower RD-cost = Rate + lambda * Distortion. + +static void StoreMaxDelta(VP8SegmentInfo* const dqm, const int16_t DCs[16]) { + // We look at the first three AC coefficients to determine what is the average + // delta between each sub-4x4 block. + const int v0 = abs(DCs[1]); + const int v1 = abs(DCs[4]); + const int v2 = abs(DCs[5]); + int max_v = (v0 > v1) ? v1 : v0; + max_v = (v2 > max_v) ? v2 : max_v; + if (max_v > dqm->max_edge_) dqm->max_edge_ = max_v; +} + +static void SwapModeScore(VP8ModeScore** a, VP8ModeScore** b) { + VP8ModeScore* const tmp = *a; + *a = *b; + *b = tmp; +} static void SwapPtr(uint8_t** a, uint8_t** b) { uint8_t* const tmp = *a; @@ -699,43 +857,69 @@ static void SwapOut(VP8EncIterator* const it) { SwapPtr(&it->yuv_out_, &it->yuv_out2_); } -static void PickBestIntra16(VP8EncIterator* const it, VP8ModeScore* const rd) { - const VP8Encoder* const enc = it->enc_; - const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; +static score_t IsFlat(const int16_t* levels, int num_blocks, score_t thresh) { + score_t score = 0; + while (num_blocks-- > 0) { // TODO(skal): refine positional scoring? + int i; + for (i = 1; i < 16; ++i) { // omit DC, we're only interested in AC + score += (levels[i] != 0); + if (score > thresh) return 0; + } + levels += 16; + } + return 1; +} + +static void PickBestIntra16(VP8EncIterator* const it, VP8ModeScore* rd) { + const int kNumBlocks = 16; + VP8SegmentInfo* const dqm = &it->enc_->dqm_[it->mb_->segment_]; const int lambda = dqm->lambda_i16_; const int tlambda = dqm->tlambda_; - const uint8_t* const src = it->yuv_in_ + Y_OFF; - VP8ModeScore rd16; + const uint8_t* const src = it->yuv_in_ + Y_OFF_ENC; + VP8ModeScore rd_tmp; + VP8ModeScore* rd_cur = &rd_tmp; + VP8ModeScore* rd_best = rd; int mode; rd->mode_i16 = -1; - for (mode = 0; mode < 4; ++mode) { - uint8_t* const tmp_dst = it->yuv_out2_ + Y_OFF; // scratch buffer - int nz; + for (mode = 0; mode < NUM_PRED_MODES; ++mode) { + uint8_t* const tmp_dst = it->yuv_out2_ + Y_OFF_ENC; // scratch buffer + rd_cur->mode_i16 = mode; // Reconstruct - nz = ReconstructIntra16(it, &rd16, tmp_dst, mode); + rd_cur->nz = ReconstructIntra16(it, rd_cur, tmp_dst, mode); // Measure RD-score - rd16.D = VP8SSE16x16(src, tmp_dst); - rd16.SD = tlambda ? MULT_8B(tlambda, VP8TDisto16x16(src, tmp_dst, kWeightY)) - : 0; - rd16.R = VP8GetCostLuma16(it, &rd16); - rd16.R += VP8FixedCostsI16[mode]; + rd_cur->D = VP8SSE16x16(src, tmp_dst); + rd_cur->SD = + tlambda ? MULT_8B(tlambda, VP8TDisto16x16(src, tmp_dst, kWeightY)) : 0; + rd_cur->H = VP8FixedCostsI16[mode]; + rd_cur->R = VP8GetCostLuma16(it, rd_cur); + if (mode > 0 && + IsFlat(rd_cur->y_ac_levels[0], kNumBlocks, FLATNESS_LIMIT_I16)) { + // penalty to avoid flat area to be mispredicted by complex mode + rd_cur->R += FLATNESS_PENALTY * kNumBlocks; + } // Since we always examine Intra16 first, we can overwrite *rd directly. - SetRDScore(lambda, &rd16); - if (mode == 0 || rd16.score < rd->score) { - CopyScore(rd, &rd16); - rd->mode_i16 = mode; - rd->nz = nz; - memcpy(rd->y_ac_levels, rd16.y_ac_levels, sizeof(rd16.y_ac_levels)); - memcpy(rd->y_dc_levels, rd16.y_dc_levels, sizeof(rd16.y_dc_levels)); + SetRDScore(lambda, rd_cur); + if (mode == 0 || rd_cur->score < rd_best->score) { + SwapModeScore(&rd_cur, &rd_best); SwapOut(it); } } + if (rd_best != rd) { + memcpy(rd, rd_best, sizeof(*rd)); + } SetRDScore(dqm->lambda_mode_, rd); // finalize score for mode decision. VP8SetIntra16Mode(it, rd->mode_i16); + + // we have a blocky macroblock (only DCs are non-zero) with fairly high + // distortion, record max delta so we can later adjust the minimal filtering + // strength needed to smooth these blocks out. + if ((rd->nz & 0xffff) == 0 && rd->D > dqm->min_disto_) { + StoreMaxDelta(dqm, rd->y_dc_levels); + } } //------------------------------------------------------------------------------ @@ -755,8 +939,8 @@ static int PickBestIntra4(VP8EncIterator* const it, VP8ModeScore* const rd) { const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; const int lambda = dqm->lambda_i4_; const int tlambda = dqm->tlambda_; - const uint8_t* const src0 = it->yuv_in_ + Y_OFF; - uint8_t* const best_blocks = it->yuv_out2_ + Y_OFF; + const uint8_t* const src0 = it->yuv_in_ + Y_OFF_ENC; + uint8_t* const best_blocks = it->yuv_out2_ + Y_OFF_ENC; int total_header_bits = 0; VP8ModeScore rd_best; @@ -765,9 +949,11 @@ static int PickBestIntra4(VP8EncIterator* const it, VP8ModeScore* const rd) { } InitScore(&rd_best); - rd_best.score = 211; // '211' is the value of VP8BitCost(0, 145) + rd_best.H = 211; // '211' is the value of VP8BitCost(0, 145) + SetRDScore(dqm->lambda_mode_, &rd_best); VP8IteratorStartI4(it); do { + const int kNumBlocks = 1; VP8ModeScore rd_i4; int mode; int best_mode = -1; @@ -791,27 +977,44 @@ static int PickBestIntra4(VP8EncIterator* const it, VP8ModeScore* const rd) { rd_tmp.SD = tlambda ? MULT_8B(tlambda, VP8TDisto4x4(src, tmp_dst, kWeightY)) : 0; - rd_tmp.R = VP8GetCostLuma4(it, tmp_levels); - rd_tmp.R += mode_costs[mode]; + rd_tmp.H = mode_costs[mode]; + + // Add flatness penalty + if (mode > 0 && IsFlat(tmp_levels, kNumBlocks, FLATNESS_LIMIT_I4)) { + rd_tmp.R = FLATNESS_PENALTY * kNumBlocks; + } else { + rd_tmp.R = 0; + } + // early-out check SetRDScore(lambda, &rd_tmp); + if (best_mode >= 0 && rd_tmp.score >= rd_i4.score) continue; + + // finish computing score + rd_tmp.R += VP8GetCostLuma4(it, tmp_levels); + SetRDScore(lambda, &rd_tmp); + if (best_mode < 0 || rd_tmp.score < rd_i4.score) { CopyScore(&rd_i4, &rd_tmp); best_mode = mode; SwapPtr(&tmp_dst, &best_block); - memcpy(rd_best.y_ac_levels[it->i4_], tmp_levels, sizeof(tmp_levels)); + memcpy(rd_best.y_ac_levels[it->i4_], tmp_levels, + sizeof(rd_best.y_ac_levels[it->i4_])); } } SetRDScore(dqm->lambda_mode_, &rd_i4); AddScore(&rd_best, &rd_i4); - total_header_bits += mode_costs[best_mode]; - if (rd_best.score >= rd->score || - total_header_bits > enc->max_i4_header_bits_) { + if (rd_best.score >= rd->score) { + return 0; + } + total_header_bits += (int)rd_i4.H; // <- equal to mode_costs[best_mode]; + if (total_header_bits > enc->max_i4_header_bits_) { return 0; } // Copy selected samples if not in the right place already. - if (best_block != best_blocks + VP8Scan[it->i4_]) + if (best_block != best_blocks + VP8Scan[it->i4_]) { VP8Copy4x4(best_block, best_blocks + VP8Scan[it->i4_]); + } rd->modes_i4[it->i4_] = best_mode; it->top_nz_[it->i4_ & 3] = it->left_nz_[it->i4_ >> 2] = (rd_i4.nz ? 1 : 0); } while (VP8IteratorRotateI4(it, best_blocks)); @@ -827,18 +1030,19 @@ static int PickBestIntra4(VP8EncIterator* const it, VP8ModeScore* const rd) { //------------------------------------------------------------------------------ static void PickBestUV(VP8EncIterator* const it, VP8ModeScore* const rd) { - const VP8Encoder* const enc = it->enc_; - const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; + const int kNumBlocks = 8; + const VP8SegmentInfo* const dqm = &it->enc_->dqm_[it->mb_->segment_]; const int lambda = dqm->lambda_uv_; - const uint8_t* const src = it->yuv_in_ + U_OFF; - uint8_t* const tmp_dst = it->yuv_out2_ + U_OFF; // scratch buffer - uint8_t* const dst0 = it->yuv_out_ + U_OFF; + const uint8_t* const src = it->yuv_in_ + U_OFF_ENC; + uint8_t* tmp_dst = it->yuv_out2_ + U_OFF_ENC; // scratch buffer + uint8_t* dst0 = it->yuv_out_ + U_OFF_ENC; + uint8_t* dst = dst0; VP8ModeScore rd_best; int mode; rd->mode_uv = -1; InitScore(&rd_best); - for (mode = 0; mode < 4; ++mode) { + for (mode = 0; mode < NUM_PRED_MODES; ++mode) { VP8ModeScore rd_uv; // Reconstruct @@ -847,19 +1051,25 @@ static void PickBestUV(VP8EncIterator* const it, VP8ModeScore* const rd) { // Compute RD-score rd_uv.D = VP8SSE16x8(src, tmp_dst); rd_uv.SD = 0; // TODO: should we call TDisto? it tends to flatten areas. + rd_uv.H = VP8FixedCostsUV[mode]; rd_uv.R = VP8GetCostUV(it, &rd_uv); - rd_uv.R += VP8FixedCostsUV[mode]; + if (mode > 0 && IsFlat(rd_uv.uv_levels[0], kNumBlocks, FLATNESS_LIMIT_UV)) { + rd_uv.R += FLATNESS_PENALTY * kNumBlocks; + } SetRDScore(lambda, &rd_uv); if (mode == 0 || rd_uv.score < rd_best.score) { CopyScore(&rd_best, &rd_uv); rd->mode_uv = mode; memcpy(rd->uv_levels, rd_uv.uv_levels, sizeof(rd->uv_levels)); - memcpy(dst0, tmp_dst, UV_SIZE); // TODO: SwapUVOut() ? + SwapPtr(&dst, &tmp_dst); } } VP8SetIntraUVMode(it, rd->mode_uv); AddScore(rd, &rd_best); + if (dst != dst0) { // copy 16x8 block if needed + VP8Copy16x8(dst, dst0); + } } //------------------------------------------------------------------------------ @@ -867,33 +1077,88 @@ static void PickBestUV(VP8EncIterator* const it, VP8ModeScore* const rd) { static void SimpleQuantize(VP8EncIterator* const it, VP8ModeScore* const rd) { const VP8Encoder* const enc = it->enc_; - const int i16 = (it->mb_->type_ == 1); + const int is_i16 = (it->mb_->type_ == 1); int nz = 0; - if (i16) { - nz = ReconstructIntra16(it, rd, it->yuv_out_ + Y_OFF, it->preds_[0]); + if (is_i16) { + nz = ReconstructIntra16(it, rd, it->yuv_out_ + Y_OFF_ENC, it->preds_[0]); } else { VP8IteratorStartI4(it); do { const int mode = it->preds_[(it->i4_ & 3) + (it->i4_ >> 2) * enc->preds_w_]; - const uint8_t* const src = it->yuv_in_ + Y_OFF + VP8Scan[it->i4_]; - uint8_t* const dst = it->yuv_out_ + Y_OFF + VP8Scan[it->i4_]; + const uint8_t* const src = it->yuv_in_ + Y_OFF_ENC + VP8Scan[it->i4_]; + uint8_t* const dst = it->yuv_out_ + Y_OFF_ENC + VP8Scan[it->i4_]; VP8MakeIntra4Preds(it); nz |= ReconstructIntra4(it, rd->y_ac_levels[it->i4_], src, dst, mode) << it->i4_; - } while (VP8IteratorRotateI4(it, it->yuv_out_ + Y_OFF)); + } while (VP8IteratorRotateI4(it, it->yuv_out_ + Y_OFF_ENC)); } - nz |= ReconstructUV(it, rd, it->yuv_out_ + U_OFF, it->mb_->uv_mode_); + nz |= ReconstructUV(it, rd, it->yuv_out_ + U_OFF_ENC, it->mb_->uv_mode_); rd->nz = nz; } +// Refine intra16/intra4 sub-modes based on distortion only (not rate). +static void DistoRefine(VP8EncIterator* const it, int try_both_i4_i16) { + const int is_i16 = (it->mb_->type_ == 1); + score_t best_score = MAX_COST; + + if (try_both_i4_i16 || is_i16) { + int mode; + int best_mode = -1; + for (mode = 0; mode < NUM_PRED_MODES; ++mode) { + const uint8_t* const ref = it->yuv_p_ + VP8I16ModeOffsets[mode]; + const uint8_t* const src = it->yuv_in_ + Y_OFF_ENC; + const score_t score = VP8SSE16x16(src, ref); + if (score < best_score) { + best_mode = mode; + best_score = score; + } + } + VP8SetIntra16Mode(it, best_mode); + } + if (try_both_i4_i16 || !is_i16) { + uint8_t modes_i4[16]; + // We don't evaluate the rate here, but just account for it through a + // constant penalty (i4 mode usually needs more bits compared to i16). + score_t score_i4 = (score_t)I4_PENALTY; + + VP8IteratorStartI4(it); + do { + int mode; + int best_sub_mode = -1; + score_t best_sub_score = MAX_COST; + const uint8_t* const src = it->yuv_in_ + Y_OFF_ENC + VP8Scan[it->i4_]; + + // TODO(skal): we don't really need the prediction pixels here, + // but just the distortion against 'src'. + VP8MakeIntra4Preds(it); + for (mode = 0; mode < NUM_BMODES; ++mode) { + const uint8_t* const ref = it->yuv_p_ + VP8I4ModeOffsets[mode]; + const score_t score = VP8SSE4x4(src, ref); + if (score < best_sub_score) { + best_sub_mode = mode; + best_sub_score = score; + } + } + modes_i4[it->i4_] = best_sub_mode; + score_i4 += best_sub_score; + if (score_i4 >= best_score) break; + } while (VP8IteratorRotateI4(it, it->yuv_in_ + Y_OFF_ENC)); + if (score_i4 < best_score) { + VP8SetIntra4Mode(it, modes_i4); + } + } +} + //------------------------------------------------------------------------------ // Entry point -int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt) { +int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, + VP8RDLevel rd_opt) { int is_skipped; + const int method = it->enc_->method_; InitScore(rd); @@ -902,22 +1167,21 @@ int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt) { VP8MakeLuma16Preds(it); VP8MakeChroma8Preds(it); - // for rd_opt = 2, we perform trellis-quant on the final decision only. - // for rd_opt > 2, we use it for every scoring (=much slower). - if (rd_opt > 0) { - it->do_trellis_ = (rd_opt > 2); + if (rd_opt > RD_OPT_NONE) { + it->do_trellis_ = (rd_opt >= RD_OPT_TRELLIS_ALL); PickBestIntra16(it, rd); - if (it->enc_->method_ >= 2) { + if (method >= 2) { PickBestIntra4(it, rd); } PickBestUV(it, rd); - if (rd_opt == 2) { + if (rd_opt == RD_OPT_TRELLIS) { // finish off with trellis-optim now it->do_trellis_ = 1; SimpleQuantize(it, rd); } } else { - // TODO: for method_ == 2, pick the best intra4/intra16 based on SSE - it->do_trellis_ = (it->enc_->method_ == 2); + // For method == 2, pick the best intra4/intra16 based on SSE (~tad slower). + // For method <= 1, we refine intra4 or intra16 (but don't re-examine mode). + DistoRefine(it, (method >= 2)); SimpleQuantize(it, rd); } is_skipped = (rd->nz == 0); @@ -925,6 +1189,3 @@ int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt) { return is_skipped; } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/enc/syntax.c b/drivers/webp/enc/syntax.c index 4221436ff9..a0e79ef404 100644 --- a/drivers/webp/enc/syntax.c +++ b/drivers/webp/enc/syntax.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Header syntax writing @@ -11,35 +13,20 @@ #include <assert.h> -#include "../format_constants.h" +#include "../utils/utils.h" +#include "../webp/format_constants.h" // RIFF constants +#include "../webp/mux_types.h" // ALPHA_FLAG #include "./vp8enci.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // Helper functions -// TODO(later): Move to webp/format_constants.h? -static void PutLE24(uint8_t* const data, uint32_t val) { - data[0] = (val >> 0) & 0xff; - data[1] = (val >> 8) & 0xff; - data[2] = (val >> 16) & 0xff; -} - -static void PutLE32(uint8_t* const data, uint32_t val) { - PutLE24(data, val); - data[3] = (val >> 24) & 0xff; -} - static int IsVP8XNeeded(const VP8Encoder* const enc) { return !!enc->has_alpha_; // Currently the only case when VP8X is needed. // This could change in the future. } static int PutPaddingByte(const WebPPicture* const pic) { - const uint8_t pad_byte[1] = { 0 }; return !!pic->writer(pad_byte, 1, pic); } @@ -73,14 +60,14 @@ static WebPEncodingError PutVP8XHeader(const VP8Encoder* const enc) { assert(pic->width <= MAX_CANVAS_SIZE && pic->height <= MAX_CANVAS_SIZE); if (enc->has_alpha_) { - flags |= ALPHA_FLAG_BIT; + flags |= ALPHA_FLAG; } PutLE32(vp8x + TAG_SIZE, VP8X_CHUNK_SIZE); PutLE32(vp8x + CHUNK_HEADER_SIZE, flags); PutLE24(vp8x + CHUNK_HEADER_SIZE + 4, pic->width - 1); PutLE24(vp8x + CHUNK_HEADER_SIZE + 7, pic->height - 1); - if(!pic->writer(vp8x, sizeof(vp8x), pic)) { + if (!pic->writer(vp8x, sizeof(vp8x), pic)) { return VP8_ENC_ERROR_BAD_WRITE; } return VP8_ENC_OK; @@ -199,8 +186,8 @@ static int PutWebPHeaders(const VP8Encoder* const enc, size_t size0, // Segmentation header static void PutSegmentHeader(VP8BitWriter* const bw, const VP8Encoder* const enc) { - const VP8SegmentHeader* const hdr = &enc->segment_hdr_; - const VP8Proba* const proba = &enc->proba_; + const VP8EncSegmentHeader* const hdr = &enc->segment_hdr_; + const VP8EncProba* const proba = &enc->proba_; if (VP8PutBitUniform(bw, (hdr->num_segments_ > 1))) { // We always 'update' the quant and filter strength values const int update_data = 1; @@ -210,16 +197,16 @@ static void PutSegmentHeader(VP8BitWriter* const bw, // we always use absolute values, not relative ones VP8PutBitUniform(bw, 1); // (segment_feature_mode = 1. Paragraph 9.3.) for (s = 0; s < NUM_MB_SEGMENTS; ++s) { - VP8PutSignedValue(bw, enc->dqm_[s].quant_, 7); + VP8PutSignedBits(bw, enc->dqm_[s].quant_, 7); } for (s = 0; s < NUM_MB_SEGMENTS; ++s) { - VP8PutSignedValue(bw, enc->dqm_[s].fstrength_, 6); + VP8PutSignedBits(bw, enc->dqm_[s].fstrength_, 6); } } if (hdr->update_map_) { for (s = 0; s < 3; ++s) { if (VP8PutBitUniform(bw, (proba->segments_[s] != 255u))) { - VP8PutValue(bw, proba->segments_[s], 8); + VP8PutBits(bw, proba->segments_[s], 8); } } } @@ -228,20 +215,20 @@ static void PutSegmentHeader(VP8BitWriter* const bw, // Filtering parameters header static void PutFilterHeader(VP8BitWriter* const bw, - const VP8FilterHeader* const hdr) { + const VP8EncFilterHeader* const hdr) { const int use_lf_delta = (hdr->i4x4_lf_delta_ != 0); VP8PutBitUniform(bw, hdr->simple_); - VP8PutValue(bw, hdr->level_, 6); - VP8PutValue(bw, hdr->sharpness_, 3); + VP8PutBits(bw, hdr->level_, 6); + VP8PutBits(bw, hdr->sharpness_, 3); if (VP8PutBitUniform(bw, use_lf_delta)) { // '0' is the default value for i4x4_lf_delta_ at frame #0. const int need_update = (hdr->i4x4_lf_delta_ != 0); if (VP8PutBitUniform(bw, need_update)) { // we don't use ref_lf_delta => emit four 0 bits - VP8PutValue(bw, 0, 4); + VP8PutBits(bw, 0, 4); // we use mode_lf_delta for i4x4 - VP8PutSignedValue(bw, hdr->i4x4_lf_delta_, 6); - VP8PutValue(bw, 0, 3); // all others unused + VP8PutSignedBits(bw, hdr->i4x4_lf_delta_, 6); + VP8PutBits(bw, 0, 3); // all others unused } } } @@ -249,12 +236,12 @@ static void PutFilterHeader(VP8BitWriter* const bw, // Nominal quantization parameters static void PutQuant(VP8BitWriter* const bw, const VP8Encoder* const enc) { - VP8PutValue(bw, enc->base_quant_, 7); - VP8PutSignedValue(bw, enc->dq_y1_dc_, 4); - VP8PutSignedValue(bw, enc->dq_y2_dc_, 4); - VP8PutSignedValue(bw, enc->dq_y2_ac_, 4); - VP8PutSignedValue(bw, enc->dq_uv_dc_, 4); - VP8PutSignedValue(bw, enc->dq_uv_ac_, 4); + VP8PutBits(bw, enc->base_quant_, 7); + VP8PutSignedBits(bw, enc->dq_y1_dc_, 4); + VP8PutSignedBits(bw, enc->dq_y2_dc_, 4); + VP8PutSignedBits(bw, enc->dq_y2_ac_, 4); + VP8PutSignedBits(bw, enc->dq_uv_dc_, 4); + VP8PutSignedBits(bw, enc->dq_uv_ac_, 4); } // Partition sizes @@ -276,58 +263,23 @@ static int EmitPartitionsSize(const VP8Encoder* const enc, //------------------------------------------------------------------------------ -#ifdef WEBP_EXPERIMENTAL_FEATURES - -#define KTRAILER_SIZE 8 - -static int WriteExtensions(VP8Encoder* const enc) { - uint8_t buffer[KTRAILER_SIZE]; - VP8BitWriter* const bw = &enc->bw_; - WebPPicture* const pic = enc->pic_; - - // Layer (bytes 0..3) - PutLE24(buffer + 0, enc->layer_data_size_); - buffer[3] = enc->pic_->colorspace & WEBP_CSP_UV_MASK; - if (enc->layer_data_size_ > 0) { - assert(enc->use_layer_); - // append layer data to last partition - if (!VP8BitWriterAppend(&enc->parts_[enc->num_parts_ - 1], - enc->layer_data_, enc->layer_data_size_)) { - return WebPEncodingSetError(pic, VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY); - } - } - - buffer[KTRAILER_SIZE - 1] = 0x01; // marker - if (!VP8BitWriterAppend(bw, buffer, KTRAILER_SIZE)) { - return WebPEncodingSetError(pic, VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY); - } - return 1; -} - -#endif /* WEBP_EXPERIMENTAL_FEATURES */ - -//------------------------------------------------------------------------------ - -static size_t GeneratePartition0(VP8Encoder* const enc) { +static int GeneratePartition0(VP8Encoder* const enc) { VP8BitWriter* const bw = &enc->bw_; const int mb_size = enc->mb_w_ * enc->mb_h_; uint64_t pos1, pos2, pos3; -#ifdef WEBP_EXPERIMENTAL_FEATURES - const int need_extensions = enc->use_layer_; -#endif pos1 = VP8BitWriterPos(bw); - VP8BitWriterInit(bw, mb_size * 7 / 8); // ~7 bits per macroblock -#ifdef WEBP_EXPERIMENTAL_FEATURES - VP8PutBitUniform(bw, need_extensions); // extensions -#else + if (!VP8BitWriterInit(bw, mb_size * 7 / 8)) { // ~7 bits per macroblock + return WebPEncodingSetError(enc->pic_, VP8_ENC_ERROR_OUT_OF_MEMORY); + } VP8PutBitUniform(bw, 0); // colorspace -#endif VP8PutBitUniform(bw, 0); // clamp type PutSegmentHeader(bw, enc); PutFilterHeader(bw, &enc->filter_hdr_); - VP8PutValue(bw, enc->config_->partitions, 2); + VP8PutBits(bw, enc->num_parts_ == 8 ? 3 : + enc->num_parts_ == 4 ? 2 : + enc->num_parts_ == 2 ? 1 : 0, 2); PutQuant(bw, enc); VP8PutBitUniform(bw, 0); // no proba update VP8WriteProbas(bw, &enc->proba_); @@ -335,21 +287,17 @@ static size_t GeneratePartition0(VP8Encoder* const enc) { VP8CodeIntraModes(enc); VP8BitWriterFinish(bw); -#ifdef WEBP_EXPERIMENTAL_FEATURES - if (need_extensions && !WriteExtensions(enc)) { - return 0; - } -#endif - pos3 = VP8BitWriterPos(bw); if (enc->pic_->stats) { enc->pic_->stats->header_bytes[0] = (int)((pos2 - pos1 + 7) >> 3); enc->pic_->stats->header_bytes[1] = (int)((pos3 - pos2 + 7) >> 3); enc->pic_->stats->alpha_data_size = (int)enc->alpha_data_size_; - enc->pic_->stats->layer_data_size = (int)enc->layer_data_size_; } - return !bw->error_; + if (bw->error_) { + return WebPEncodingSetError(enc->pic_, VP8_ENC_ERROR_OUT_OF_MEMORY); + } + return 1; } void VP8EncFreeBitWriters(VP8Encoder* const enc) { @@ -371,7 +319,8 @@ int VP8EncWrite(VP8Encoder* const enc) { int p; // Partition #0 with header and partition sizes - ok = !!GeneratePartition0(enc); + ok = GeneratePartition0(enc); + if (!ok) return 0; // Compute VP8 size vp8_size = VP8_FRAME_HEADER_SIZE + @@ -432,6 +381,3 @@ int VP8EncWrite(VP8Encoder* const enc) { //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/enc/tree.c b/drivers/webp/enc/tree.c index 8b25e5e488..f141006d19 100644 --- a/drivers/webp/enc/tree.c +++ b/drivers/webp/enc/tree.c @@ -1,27 +1,24 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // -// Token probabilities +// Coding of token probabilities, intra modes and segments. // // Author: Skal (pascal.massimino@gmail.com) #include "./vp8enci.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // Default probabilities // Paragraph 13.5 const uint8_t VP8CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { - // genereated using vp8_default_coef_probs() in entropy.c:129 { { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } @@ -157,7 +154,7 @@ const uint8_t }; void VP8DefaultProbas(VP8Encoder* const enc) { - VP8Proba* const probas = &enc->proba_; + VP8EncProba* const probas = &enc->proba_; probas->use_skip_proba_ = 0; memset(probas->segments_, 255u, sizeof(probas->segments_)); memcpy(probas->coeffs_, VP8CoeffsProba0, sizeof(VP8CoeffsProba0)); @@ -318,7 +315,7 @@ void VP8CodeIntraModes(VP8Encoder* const enc) { VP8EncIterator it; VP8IteratorInit(enc, &it); do { - const VP8MBInfo* mb = it.mb_; + const VP8MBInfo* const mb = it.mb_; const uint8_t* preds = it.preds_; if (enc->segment_hdr_.update_map_) { PutSegment(bw, mb->segment_, enc->proba_.segments_); @@ -343,7 +340,7 @@ void VP8CodeIntraModes(VP8Encoder* const enc) { } } PutUVMode(bw, mb->uv_mode_); - } while (VP8IteratorNext(&it, 0)); + } while (VP8IteratorNext(&it)); } //------------------------------------------------------------------------------ @@ -485,7 +482,7 @@ const uint8_t } }; -void VP8WriteProbas(VP8BitWriter* const bw, const VP8Proba* const probas) { +void VP8WriteProbas(VP8BitWriter* const bw, const VP8EncProba* const probas) { int t, b, c, p; for (t = 0; t < NUM_TYPES; ++t) { for (b = 0; b < NUM_BANDS; ++b) { @@ -494,17 +491,14 @@ void VP8WriteProbas(VP8BitWriter* const bw, const VP8Proba* const probas) { const uint8_t p0 = probas->coeffs_[t][b][c][p]; const int update = (p0 != VP8CoeffsProba0[t][b][c][p]); if (VP8PutBit(bw, update, VP8CoeffsUpdateProba[t][b][c][p])) { - VP8PutValue(bw, p0, 8); + VP8PutBits(bw, p0, 8); } } } } } if (VP8PutBitUniform(bw, probas->use_skip_proba_)) { - VP8PutValue(bw, probas->skip_proba_, 8); + VP8PutBits(bw, probas->skip_proba_, 8); } } -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/enc/vp8enci.h b/drivers/webp/enc/vp8enci.h index 936e1c18ce..1a7ebe5703 100644 --- a/drivers/webp/enc/vp8enci.h +++ b/drivers/webp/enc/vp8enci.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // WebP encoder: internal header. @@ -13,11 +15,18 @@ #define WEBP_ENC_VP8ENCI_H_ #include <string.h> // for memcpy() -#include "../encode.h" +#include "../dec/common.h" #include "../dsp/dsp.h" #include "../utils/bit_writer.h" +#include "../utils/thread.h" +#include "../utils/utils.h" +#include "../webp/encode.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef WEBP_EXPERIMENTAL_FEATURES +#include "./vp8li.h" +#endif // WEBP_EXPERIMENTAL_FEATURES + +#ifdef __cplusplus extern "C" { #endif @@ -26,141 +35,94 @@ extern "C" { // version numbers #define ENC_MAJ_VERSION 0 -#define ENC_MIN_VERSION 2 -#define ENC_REV_VERSION 0 - -// size of histogram used by CollectHistogram. -#define MAX_COEFF_THRESH 64 - -// intra prediction modes -enum { B_DC_PRED = 0, // 4x4 modes - B_TM_PRED = 1, - B_VE_PRED = 2, - B_HE_PRED = 3, - B_RD_PRED = 4, - B_VR_PRED = 5, - B_LD_PRED = 6, - B_VL_PRED = 7, - B_HD_PRED = 8, - B_HU_PRED = 9, - NUM_BMODES = B_HU_PRED + 1 - B_DC_PRED, // = 10 - - // Luma16 or UV modes - DC_PRED = B_DC_PRED, V_PRED = B_VE_PRED, - H_PRED = B_HE_PRED, TM_PRED = B_TM_PRED - }; +#define ENC_MIN_VERSION 4 +#define ENC_REV_VERSION 4 -enum { NUM_MB_SEGMENTS = 4, - MAX_NUM_PARTITIONS = 8, - NUM_TYPES = 4, // 0: i16-AC, 1: i16-DC, 2:chroma-AC, 3:i4-AC - NUM_BANDS = 8, - NUM_CTX = 3, - NUM_PROBAS = 11, - MAX_LF_LEVELS = 64, // Maximum loop filter level - MAX_VARIABLE_LEVEL = 67 // last (inclusive) level with variable cost +enum { MAX_LF_LEVELS = 64, // Maximum loop filter level + MAX_VARIABLE_LEVEL = 67, // last (inclusive) level with variable cost + MAX_LEVEL = 2047 // max level (note: max codable is 2047 + 67) }; -// YUV-cache parameters. Cache is 16-pixels wide. -// The original or reconstructed samples can be accessed using VP8Scan[] +typedef enum { // Rate-distortion optimization levels + RD_OPT_NONE = 0, // no rd-opt + RD_OPT_BASIC = 1, // basic scoring (no trellis) + RD_OPT_TRELLIS = 2, // perform trellis-quant on the final decision only + RD_OPT_TRELLIS_ALL = 3 // trellis-quant for every scoring (much slower) +} VP8RDLevel; + +// YUV-cache parameters. Cache is 32-bytes wide (= one cacheline). +// The original or reconstructed samples can be accessed using VP8Scan[]. // The predicted blocks can be accessed using offsets to yuv_p_ and -// the arrays VP8*ModeOffsets[]; -// +----+ YUV Samples area. See VP8Scan[] for accessing the blocks. -// Y_OFF |YYYY| <- original samples (enc->yuv_in_) -// |YYYY| -// |YYYY| -// |YYYY| -// U_OFF |UUVV| V_OFF (=U_OFF + 8) -// |UUVV| -// +----+ -// Y_OFF |YYYY| <- compressed/decoded samples ('yuv_out_') -// |YYYY| There are two buffers like this ('yuv_out_'/'yuv_out2_') -// |YYYY| -// |YYYY| -// U_OFF |UUVV| V_OFF -// |UUVV| -// x2 (for yuv_out2_) -// +----+ Prediction area ('yuv_p_', size = PRED_SIZE) -// I16DC16 |YYYY| Intra16 predictions (16x16 block each) -// |YYYY| -// |YYYY| -// |YYYY| -// I16TM16 |YYYY| -// |YYYY| -// |YYYY| -// |YYYY| -// I16VE16 |YYYY| -// |YYYY| -// |YYYY| -// |YYYY| -// I16HE16 |YYYY| -// |YYYY| -// |YYYY| -// |YYYY| -// +----+ Chroma U/V predictions (16x8 block each) -// C8DC8 |UUVV| -// |UUVV| -// C8TM8 |UUVV| -// |UUVV| -// C8VE8 |UUVV| -// |UUVV| -// C8HE8 |UUVV| -// |UUVV| -// +----+ Intra 4x4 predictions (4x4 block each) -// |YYYY| I4DC4 I4TM4 I4VE4 I4HE4 -// |YYYY| I4RD4 I4VR4 I4LD4 I4VL4 -// |YY..| I4HD4 I4HU4 I4TMP -// +----+ -#define BPS 16 // this is the common stride -#define Y_SIZE (BPS * 16) -#define UV_SIZE (BPS * 8) -#define YUV_SIZE (Y_SIZE + UV_SIZE) -#define PRED_SIZE (6 * 16 * BPS + 12 * BPS) -#define Y_OFF (0) -#define U_OFF (Y_SIZE) -#define V_OFF (U_OFF + 8) -#define ALIGN_CST 15 -#define DO_ALIGN(PTR) ((uintptr_t)((PTR) + ALIGN_CST) & ~ALIGN_CST) - -extern const int VP8Scan[16 + 4 + 4]; // in quant.c -extern const int VP8UVModeOffsets[4]; // in analyze.c +// the arrays VP8*ModeOffsets[]. +// * YUV Samples area (yuv_in_/yuv_out_/yuv_out2_) +// (see VP8Scan[] for accessing the blocks, along with +// Y_OFF_ENC/U_OFF_ENC/V_OFF_ENC): +// +----+----+ +// Y_OFF_ENC |YYYY|UUVV| +// U_OFF_ENC |YYYY|UUVV| +// V_OFF_ENC |YYYY|....| <- 25% wasted U/V area +// |YYYY|....| +// +----+----+ +// * Prediction area ('yuv_p_', size = PRED_SIZE_ENC) +// Intra16 predictions (16x16 block each, two per row): +// |I16DC16|I16TM16| +// |I16VE16|I16HE16| +// Chroma U/V predictions (16x8 block each, two per row): +// |C8DC8|C8TM8| +// |C8VE8|C8HE8| +// Intra 4x4 predictions (4x4 block each) +// |I4DC4 I4TM4 I4VE4 I4HE4|I4RD4 I4VR4 I4LD4 I4VL4| +// |I4HD4 I4HU4 I4TMP .....|.......................| <- ~31% wasted +#define YUV_SIZE_ENC (BPS * 16) +#define PRED_SIZE_ENC (32 * BPS + 16 * BPS + 8 * BPS) // I16+Chroma+I4 preds +#define Y_OFF_ENC (0) +#define U_OFF_ENC (16) +#define V_OFF_ENC (16 + 8) + +extern const int VP8Scan[16]; // in quant.c +extern const int VP8UVModeOffsets[4]; // in analyze.c extern const int VP8I16ModeOffsets[4]; extern const int VP8I4ModeOffsets[NUM_BMODES]; // Layout of prediction blocks // intra 16x16 #define I16DC16 (0 * 16 * BPS) -#define I16TM16 (1 * 16 * BPS) -#define I16VE16 (2 * 16 * BPS) -#define I16HE16 (3 * 16 * BPS) +#define I16TM16 (I16DC16 + 16) +#define I16VE16 (1 * 16 * BPS) +#define I16HE16 (I16VE16 + 16) // chroma 8x8, two U/V blocks side by side (hence: 16x8 each) -#define C8DC8 (4 * 16 * BPS) -#define C8TM8 (4 * 16 * BPS + 8 * BPS) -#define C8VE8 (5 * 16 * BPS) -#define C8HE8 (5 * 16 * BPS + 8 * BPS) +#define C8DC8 (2 * 16 * BPS) +#define C8TM8 (C8DC8 + 1 * 16) +#define C8VE8 (2 * 16 * BPS + 8 * BPS) +#define C8HE8 (C8VE8 + 1 * 16) // intra 4x4 -#define I4DC4 (6 * 16 * BPS + 0) -#define I4TM4 (6 * 16 * BPS + 4) -#define I4VE4 (6 * 16 * BPS + 8) -#define I4HE4 (6 * 16 * BPS + 12) -#define I4RD4 (6 * 16 * BPS + 4 * BPS + 0) -#define I4VR4 (6 * 16 * BPS + 4 * BPS + 4) -#define I4LD4 (6 * 16 * BPS + 4 * BPS + 8) -#define I4VL4 (6 * 16 * BPS + 4 * BPS + 12) -#define I4HD4 (6 * 16 * BPS + 8 * BPS + 0) -#define I4HU4 (6 * 16 * BPS + 8 * BPS + 4) -#define I4TMP (6 * 16 * BPS + 8 * BPS + 8) +#define I4DC4 (3 * 16 * BPS + 0) +#define I4TM4 (I4DC4 + 4) +#define I4VE4 (I4DC4 + 8) +#define I4HE4 (I4DC4 + 12) +#define I4RD4 (I4DC4 + 16) +#define I4VR4 (I4DC4 + 20) +#define I4LD4 (I4DC4 + 24) +#define I4VL4 (I4DC4 + 28) +#define I4HD4 (3 * 16 * BPS + 4 * BPS) +#define I4HU4 (I4HD4 + 4) +#define I4TMP (I4HD4 + 8) typedef int64_t score_t; // type used for scores, rate, distortion +// Note that MAX_COST is not the maximum allowed by sizeof(score_t), +// in order to allow overflowing computations. #define MAX_COST ((score_t)0x7fffffffffffffLL) #define QFIX 17 #define BIAS(b) ((b) << (QFIX - 8)) // Fun fact: this is the _only_ line where we're actually being lossy and // discarding bits. -static WEBP_INLINE int QUANTDIV(int n, int iQ, int B) { - return (n * iQ + B) >> QFIX; +static WEBP_INLINE int QUANTDIV(uint32_t n, uint32_t iQ, uint32_t B) { + return (int)((n * iQ + B) >> QFIX); } -extern const uint8_t VP8Zigzag[16]; + +// Uncomment the following to remove token-buffer code: +// #define DISABLE_TOKEN_BUFFER //------------------------------------------------------------------------------ // Headers @@ -169,6 +131,8 @@ typedef uint32_t proba_t; // 16b + 16b typedef uint8_t ProbaArray[NUM_CTX][NUM_PROBAS]; typedef proba_t StatsArray[NUM_CTX][NUM_PROBAS]; typedef uint16_t CostArray[NUM_CTX][MAX_VARIABLE_LEVEL + 1]; +typedef const uint16_t* (*CostArrayPtr)[NUM_CTX]; // for easy casting +typedef const uint16_t* CostArrayMap[16][NUM_CTX]; typedef double LFStats[NUM_MB_SEGMENTS][MAX_LF_LEVELS]; // filter stats typedef struct VP8Encoder VP8Encoder; @@ -179,19 +143,20 @@ typedef struct { int update_map_; // whether to update the segment map or not. // must be 0 if there's only 1 segment. int size_; // bit-cost for transmitting the segment map -} VP8SegmentHeader; +} VP8EncSegmentHeader; // Struct collecting all frame-persistent probabilities. typedef struct { uint8_t segments_[3]; // probabilities for segment tree uint8_t skip_proba_; // final probability of being skipped. - ProbaArray coeffs_[NUM_TYPES][NUM_BANDS]; // 924 bytes + ProbaArray coeffs_[NUM_TYPES][NUM_BANDS]; // 1056 bytes StatsArray stats_[NUM_TYPES][NUM_BANDS]; // 4224 bytes - CostArray level_cost_[NUM_TYPES][NUM_BANDS]; // 11.4k + CostArray level_cost_[NUM_TYPES][NUM_BANDS]; // 13056 bytes + CostArrayMap remapped_costs_[NUM_TYPES]; // 1536 bytes int dirty_; // if true, need to call VP8CalculateLevelCosts() int use_skip_proba_; // Note: we always use skip_proba for now. int nb_skip_; // number of skipped blocks -} VP8Proba; +} VP8EncProba; // Filter parameters. Not actually used in the code (we don't perform // the in-loop filtering), but filled from user's config @@ -200,7 +165,7 @@ typedef struct { int level_; // base filter level [0..63] int sharpness_; // [0..7] int i4x4_lf_delta_; // delta filter level for i4x4 relative to i16x16 -} VP8FilterHeader; +} VP8EncFilterHeader; //------------------------------------------------------------------------------ // Informations about the macroblocks. @@ -217,8 +182,8 @@ typedef struct { typedef struct VP8Matrix { uint16_t q_[16]; // quantizer steps uint16_t iq_[16]; // reciprocals, fixed point. - uint16_t bias_[16]; // rounding bias - uint16_t zthresh_[16]; // value under which a coefficient is zeroed + uint32_t bias_[16]; // rounding bias + uint32_t zthresh_[16]; // value below which a coefficient is zeroed uint16_t sharpen_[16]; // frequency boosters for slight sharpening } VP8Matrix; @@ -229,16 +194,19 @@ typedef struct { int beta_; // filter-susceptibility, range [0,255]. int quant_; // final segment quantizer. int fstrength_; // final in-loop filtering strength + int max_edge_; // max edge delta (for filtering strength) + int min_disto_; // minimum distortion required to trigger filtering record // reactivities int lambda_i16_, lambda_i4_, lambda_uv_; int lambda_mode_, lambda_trellis_, tlambda_; int lambda_trellis_i16_, lambda_trellis_i4_, lambda_trellis_uv_; } VP8SegmentInfo; -// Handy transcient struct to accumulate score and info during RD-optimization +// Handy transient struct to accumulate score and info during RD-optimization // and mode evaluation. typedef struct { - score_t D, SD, R, score; // Distortion, spectral distortion, rate, score. + score_t D, SD; // Distortion, spectral distortion + score_t H, R, score; // header bits, rate, score. int16_t y_dc_levels[16]; // Quantized levels for luma-DC, luma-AC, chroma. int16_t y_ac_levels[16][16]; int16_t uv_levels[4 + 4][16]; @@ -252,12 +220,11 @@ typedef struct { // right neighbouring data (samples, predictions, contexts, ...) typedef struct { int x_, y_; // current macroblock - int y_offset_, uv_offset_; // offset to the luma / chroma planes int y_stride_, uv_stride_; // respective strides - uint8_t* yuv_in_; // borrowed from enc_ (for now) - uint8_t* yuv_out_; // '' - uint8_t* yuv_out2_; // '' - uint8_t* yuv_p_; // '' + uint8_t* yuv_in_; // input samples + uint8_t* yuv_out_; // output samples + uint8_t* yuv_out2_; // secondary buffer swapped with yuv_out_. + uint8_t* yuv_p_; // scratch buffer for prediction VP8Encoder* enc_; // back-pointer VP8MBInfo* mb_; // current macroblock VP8BitWriter* bw_; // current bit-writer @@ -273,24 +240,44 @@ typedef struct { uint64_t uv_bits_; // macroblock bit-cost for chroma LFStats* lf_stats_; // filter stats (borrowed from enc_) int do_trellis_; // if true, perform extra level optimisation - int done_; // true when scan is finished + int count_down_; // number of mb still to be processed + int count_down0_; // starting counter value (for progress) int percent0_; // saved initial progress percent + + uint8_t* y_left_; // left luma samples (addressable from index -1 to 15). + uint8_t* u_left_; // left u samples (addressable from index -1 to 7) + uint8_t* v_left_; // left v samples (addressable from index -1 to 7) + + uint8_t* y_top_; // top luma samples at position 'x_' + uint8_t* uv_top_; // top u/v samples at position 'x_', packed as 16 bytes + + // memory for storing y/u/v_left_ + uint8_t yuv_left_mem_[17 + 16 + 16 + 8 + WEBP_ALIGN_CST]; + // memory for yuv_* + uint8_t yuv_mem_[3 * YUV_SIZE_ENC + PRED_SIZE_ENC + WEBP_ALIGN_CST]; } VP8EncIterator; // in iterator.c -// must be called first. +// must be called first void VP8IteratorInit(VP8Encoder* const enc, VP8EncIterator* const it); -// restart a scan. +// restart a scan void VP8IteratorReset(VP8EncIterator* const it); -// import samples from source -void VP8IteratorImport(const VP8EncIterator* const it); +// reset iterator position to row 'y' +void VP8IteratorSetRow(VP8EncIterator* const it, int y); +// set count down (=number of iterations to go) +void VP8IteratorSetCountDown(VP8EncIterator* const it, int count_down); +// return true if iteration is finished +int VP8IteratorIsDone(const VP8EncIterator* const it); +// Import uncompressed samples from source. +// If tmp_32 is not NULL, import boundary samples too. +// tmp_32 is a 32-bytes scratch buffer that must be aligned in memory. +void VP8IteratorImport(VP8EncIterator* const it, uint8_t* tmp_32); // export decimated samples void VP8IteratorExport(const VP8EncIterator* const it); -// go to next macroblock. Returns !done_. If *block_to_save is non-null, will -// save the boundary values to top_/left_ arrays. block_to_save can be -// it->yuv_out_ or it->yuv_in_. -int VP8IteratorNext(VP8EncIterator* const it, - const uint8_t* const block_to_save); +// go to next macroblock. Returns false if not finished. +int VP8IteratorNext(VP8EncIterator* const it); +// save the yuv_out_ boundary values to top_/left_ arrays for next iterations. +void VP8IteratorSaveBoundary(VP8EncIterator* const it); // Report progression based on macroblock rows. Return 0 for user-abort request. int VP8IteratorProgress(const VP8EncIterator* const it, int final_delta_percent); @@ -314,44 +301,43 @@ void VP8SetSegment(const VP8EncIterator* const it, int segment); //------------------------------------------------------------------------------ // Paginated token buffer -// WIP: #define USE_TOKEN_BUFFER +typedef struct VP8Tokens VP8Tokens; // struct details in token.c -#ifdef USE_TOKEN_BUFFER +typedef struct { +#if !defined(DISABLE_TOKEN_BUFFER) + VP8Tokens* pages_; // first page + VP8Tokens** last_page_; // last page + uint16_t* tokens_; // set to (*last_page_)->tokens_ + int left_; // how many free tokens left before the page is full + int page_size_; // number of tokens per page +#endif + int error_; // true in case of malloc error +} VP8TBuffer; -#define MAX_NUM_TOKEN 2048 +// initialize an empty buffer +void VP8TBufferInit(VP8TBuffer* const b, int page_size); +void VP8TBufferClear(VP8TBuffer* const b); // de-allocate pages memory -typedef struct VP8Tokens VP8Tokens; -struct VP8Tokens { - uint16_t tokens_[MAX_NUM_TOKEN]; // bit#15: bit, bits 0..14: slot - int left_; - VP8Tokens* next_; -}; +#if !defined(DISABLE_TOKEN_BUFFER) -typedef struct { - VP8Tokens* rows_; - uint16_t* tokens_; // set to (*last_)->tokens_ - VP8Tokens** last_; - int left_; - int error_; // true in case of malloc error -} VP8TBuffer; +// Finalizes bitstream when probabilities are known. +// Deletes the allocated token memory if final_pass is true. +int VP8EmitTokens(VP8TBuffer* const b, VP8BitWriter* const bw, + const uint8_t* const probas, int final_pass); -void VP8TBufferInit(VP8TBuffer* const b); // initialize an empty buffer -int VP8TBufferNewPage(VP8TBuffer* const b); // allocate a new page -void VP8TBufferClear(VP8TBuffer* const b); // de-allocate memory +// record the coding of coefficients without knowing the probabilities yet +int VP8RecordCoeffTokens(const int ctx, const int coeff_type, + int first, int last, + const int16_t* const coeffs, + VP8TBuffer* const tokens); -int VP8EmitTokens(const VP8TBuffer* const b, VP8BitWriter* const bw, - const uint8_t* const probas); +// Estimate the final coded size given a set of 'probas'. +size_t VP8EstimateTokenSize(VP8TBuffer* const b, const uint8_t* const probas); -static WEBP_INLINE int VP8AddToken(VP8TBuffer* const b, - int bit, int proba_idx) { - if (b->left_ > 0 || VP8TBufferNewPage(b)) { - const int slot = --b->left_; - b->tokens_[slot] = (bit << 15) | proba_idx; - } - return bit; -} +// unused for now +void VP8TokenToStats(const VP8TBuffer* const b, proba_t* const stats); -#endif // USE_TOKEN_BUFFER +#endif // !DISABLE_TOKEN_BUFFER //------------------------------------------------------------------------------ // VP8Encoder @@ -361,8 +347,8 @@ struct VP8Encoder { WebPPicture* pic_; // input / output picture // headers - VP8FilterHeader filter_hdr_; // filtering information - VP8SegmentHeader segment_hdr_; // segment information + VP8EncFilterHeader filter_hdr_; // filtering information + VP8EncSegmentHeader segment_hdr_; // segment information int profile_; // VP8's profile, deduced from Config. @@ -376,6 +362,7 @@ struct VP8Encoder { // per-partition boolean decoders. VP8BitWriter bw_; // part0 VP8BitWriter parts_[MAX_NUM_PARTITIONS]; // token partitions + VP8TBuffer tokens_; // token buffer int percent_; // for progress @@ -383,17 +370,13 @@ struct VP8Encoder { int has_alpha_; uint8_t* alpha_data_; // non-NULL if transparency is present uint32_t alpha_data_size_; - - // enhancement layer - int use_layer_; - VP8BitWriter layer_bw_; - uint8_t* layer_data_; - size_t layer_data_size_; + WebPWorker alpha_worker_; // quantization info (one set of DC/AC dequant factor per segment) VP8SegmentInfo dqm_[NUM_MB_SEGMENTS]; int base_quant_; // nominal quantizer value. Only used // for relative coding of segments' quant. + int alpha_; // global susceptibility (<=> complexity) int uv_alpha_; // U/V quantization susceptibility // global offset of quantizers, shared by all segments int dq_y1_dc_; @@ -401,34 +384,29 @@ struct VP8Encoder { int dq_uv_dc_, dq_uv_ac_; // probabilities and statistics - VP8Proba proba_; - uint64_t sse_[4]; // sum of Y/U/V/A squared errors for all macroblocks - uint64_t sse_count_; // pixel count for the sse_[] stats - int coded_size_; - int residual_bytes_[3][4]; - int block_count_[3]; + VP8EncProba proba_; + uint64_t sse_[4]; // sum of Y/U/V/A squared errors for all macroblocks + uint64_t sse_count_; // pixel count for the sse_[] stats + int coded_size_; + int residual_bytes_[3][4]; + int block_count_[3]; // quality/speed settings - int method_; // 0=fastest, 6=best/slowest. - int rd_opt_level_; // Deduced from method_. - int max_i4_header_bits_; // partition #0 safeness factor + int method_; // 0=fastest, 6=best/slowest. + VP8RDLevel rd_opt_level_; // Deduced from method_. + int max_i4_header_bits_; // partition #0 safeness factor + int thread_level_; // derived from config->thread_level + int do_search_; // derived from config->target_XXX + int use_tokens_; // if true, use token buffer // Memory VP8MBInfo* mb_info_; // contextual macroblock infos (mb_w_ + 1) uint8_t* preds_; // predictions modes: (4*mb_w+1) * (4*mb_h+1) uint32_t* nz_; // non-zero bit context: mb_w+1 - uint8_t* yuv_in_; // input samples - uint8_t* yuv_out_; // output samples - uint8_t* yuv_out2_; // secondary scratch out-buffer. swapped with yuv_out_. - uint8_t* yuv_p_; // scratch buffer for prediction - uint8_t *y_top_; // top luma samples. - uint8_t *uv_top_; // top u/v samples. - // U and V are packed into 16 pixels (8 U + 8 V) - uint8_t *y_left_; // left luma samples (adressable from index -1 to 15). - uint8_t *u_left_; // left u samples (adressable from index -1 to 7) - uint8_t *v_left_; // left v samples (adressable from index -1 to 7) - - LFStats *lf_stats_; // autofilter stats (if NULL, autofilter is off) + uint8_t* y_top_; // top luma samples. + uint8_t* uv_top_; // top u/v samples. + // U and V are packed into 16 bytes (8 U + 8 V) + LFStats* lf_stats_; // autofilter stats (if NULL, autofilter is off) }; //------------------------------------------------------------------------------ @@ -441,7 +419,7 @@ extern const uint8_t // Reset the token probabilities to their initial (default) values void VP8DefaultProbas(VP8Encoder* const enc); // Write the token probabilities -void VP8WriteProbas(VP8BitWriter* const bw, const VP8Proba* const probas); +void VP8WriteProbas(VP8BitWriter* const bw, const VP8EncProba* const probas); // Writes the partition #0 modes (that is: all intra modes) void VP8CodeIntraModes(VP8Encoder* const enc); @@ -454,7 +432,11 @@ int VP8EncWrite(VP8Encoder* const enc); void VP8EncFreeBitWriters(VP8Encoder* const enc); // in frame.c -extern const uint8_t VP8EncBands[16 + 1]; +extern const uint8_t VP8Cat3[]; +extern const uint8_t VP8Cat4[]; +extern const uint8_t VP8Cat5[]; +extern const uint8_t VP8Cat6[]; + // Form all the four Intra16x16 predictions in the yuv_p_ cache void VP8MakeLuma16Preds(const VP8EncIterator* const it); // Form all the four Chroma8x8 predictions in the yuv_p_ cache @@ -466,9 +448,9 @@ void VP8MakeIntra4Preds(const VP8EncIterator* const it); int VP8GetCostLuma16(VP8EncIterator* const it, const VP8ModeScore* const rd); int VP8GetCostLuma4(VP8EncIterator* const it, const int16_t levels[16]); int VP8GetCostUV(VP8EncIterator* const it, const VP8ModeScore* const rd); -// Main stat / coding passes +// Main coding calls int VP8EncLoop(VP8Encoder* const enc); -int VP8StatLoop(VP8Encoder* const enc); +int VP8EncTokenLoop(VP8Encoder* const enc); // in webpenc.c // Assign an error code to a picture. Return false for convenience. @@ -485,18 +467,14 @@ int VP8EncAnalyze(VP8Encoder* const enc); // Sets up segment's quantization values, base_quant_ and filter strengths. void VP8SetSegmentParams(VP8Encoder* const enc, float quality); // Pick best modes and fills the levels. Returns true if skipped. -int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt); +int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, + VP8RDLevel rd_opt); // in alpha.c void VP8EncInitAlpha(VP8Encoder* const enc); // initialize alpha compression +int VP8EncStartAlpha(VP8Encoder* const enc); // start alpha coding process int VP8EncFinishAlpha(VP8Encoder* const enc); // finalize compressed data -void VP8EncDeleteAlpha(VP8Encoder* const enc); // delete compressed data - - // in layer.c -void VP8EncInitLayer(VP8Encoder* const enc); // init everything -void VP8EncCodeLayerBlock(VP8EncIterator* it); // code one more macroblock -int VP8EncFinishLayer(VP8Encoder* const enc); // finalize coding -void VP8EncDeleteLayer(VP8Encoder* enc); // reclaim memory +int VP8EncDeleteAlpha(VP8Encoder* const enc); // delete compressed data // in filter.c @@ -516,9 +494,38 @@ void VP8InitFilter(VP8EncIterator* const it); void VP8StoreFilterStats(VP8EncIterator* const it); void VP8AdjustFilterStrength(VP8EncIterator* const it); +// returns the approximate filtering strength needed to smooth a edge +// step of 'delta', given a sharpness parameter 'sharpness'. +int VP8FilterStrengthFromDelta(int sharpness, int delta); + + // misc utils for picture_*.c: + +// Remove reference to the ARGB/YUVA buffer (doesn't free anything). +void WebPPictureResetBuffers(WebPPicture* const picture); + +// Allocates ARGB buffer of given dimension (previous one is always free'd). +// Preserves the YUV(A) buffer. Returns false in case of error (invalid param, +// out-of-memory). +int WebPPictureAllocARGB(WebPPicture* const picture, int width, int height); + +// Allocates YUVA buffer of given dimension (previous one is always free'd). +// Uses picture->csp to determine whether an alpha buffer is needed. +// Preserves the ARGB buffer. +// Returns false in case of error (invalid param, out-of-memory). +int WebPPictureAllocYUVA(WebPPicture* const picture, int width, int height); + + // in near_lossless.c +// Near lossless preprocessing in RGB color-space. +int VP8ApplyNearLossless(int xsize, int ysize, uint32_t* argb, int quality); +// Near lossless adjustment for predictors. +void VP8ApplyNearLosslessPredict(int xsize, int ysize, int pred_bits, + const uint32_t* argb_orig, + uint32_t* argb, uint32_t* argb_scratch, + const uint32_t* const transform_data, + int quality, int subtract_green); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/enc/vp8l.c b/drivers/webp/enc/vp8l.c index f4eb6e783f..047c9032ac 100644 --- a/drivers/webp/enc/vp8l.c +++ b/drivers/webp/enc/vp8l.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // main entry for the lossless encoder. @@ -11,7 +13,6 @@ // #include <assert.h> -#include <stdio.h> #include <stdlib.h> #include "./backward_references.h" @@ -21,28 +22,107 @@ #include "../utils/bit_writer.h" #include "../utils/huffman_encode.h" #include "../utils/utils.h" -#include "../format_constants.h" +#include "../webp/format_constants.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "./delta_palettization.h" #define PALETTE_KEY_RIGHT_SHIFT 22 // Key for 1K buffer. -#define MAX_HUFF_IMAGE_SIZE (16 * 1024 * 1024) -#define MAX_COLORS_FOR_GRAPH 64 +// Maximum number of histogram images (sub-blocks). +#define MAX_HUFF_IMAGE_SIZE 2600 -// ----------------------------------------------------------------------------- -// Palette +// Palette reordering for smaller sum of deltas (and for smaller storage). -static int CompareColors(const void* p1, const void* p2) { +static int PaletteCompareColorsForQsort(const void* p1, const void* p2) { const uint32_t a = *(const uint32_t*)p1; const uint32_t b = *(const uint32_t*)p2; - return (a < b) ? -1 : (a > b) ? 1 : 0; + assert(a != b); + return (a < b) ? -1 : 1; +} + +static WEBP_INLINE uint32_t PaletteComponentDistance(uint32_t v) { + return (v <= 128) ? v : (256 - v); +} + +// Computes a value that is related to the entropy created by the +// palette entry diff. +// +// Note that the last & 0xff is a no-operation in the next statement, but +// removed by most compilers and is here only for regularity of the code. +static WEBP_INLINE uint32_t PaletteColorDistance(uint32_t col1, uint32_t col2) { + const uint32_t diff = VP8LSubPixels(col1, col2); + const int kMoreWeightForRGBThanForAlpha = 9; + uint32_t score; + score = PaletteComponentDistance((diff >> 0) & 0xff); + score += PaletteComponentDistance((diff >> 8) & 0xff); + score += PaletteComponentDistance((diff >> 16) & 0xff); + score *= kMoreWeightForRGBThanForAlpha; + score += PaletteComponentDistance((diff >> 24) & 0xff); + return score; +} + +static WEBP_INLINE void SwapColor(uint32_t* const col1, uint32_t* const col2) { + const uint32_t tmp = *col1; + *col1 = *col2; + *col2 = tmp; +} + +static void GreedyMinimizeDeltas(uint32_t palette[], int num_colors) { + // Find greedily always the closest color of the predicted color to minimize + // deltas in the palette. This reduces storage needs since the + // palette is stored with delta encoding. + uint32_t predict = 0x00000000; + int i, k; + for (i = 0; i < num_colors; ++i) { + int best_ix = i; + uint32_t best_score = ~0U; + for (k = i; k < num_colors; ++k) { + const uint32_t cur_score = PaletteColorDistance(palette[k], predict); + if (best_score > cur_score) { + best_score = cur_score; + best_ix = k; + } + } + SwapColor(&palette[best_ix], &palette[i]); + predict = palette[i]; + } +} + +// The palette has been sorted by alpha. This function checks if the other +// components of the palette have a monotonic development with regards to +// position in the palette. If all have monotonic development, there is +// no benefit to re-organize them greedily. A monotonic development +// would be spotted in green-only situations (like lossy alpha) or gray-scale +// images. +static int PaletteHasNonMonotonousDeltas(uint32_t palette[], int num_colors) { + uint32_t predict = 0x000000; + int i; + uint8_t sign_found = 0x00; + for (i = 0; i < num_colors; ++i) { + const uint32_t diff = VP8LSubPixels(palette[i], predict); + const uint8_t rd = (diff >> 16) & 0xff; + const uint8_t gd = (diff >> 8) & 0xff; + const uint8_t bd = (diff >> 0) & 0xff; + if (rd != 0x00) { + sign_found |= (rd < 0x80) ? 1 : 2; + } + if (gd != 0x00) { + sign_found |= (gd < 0x80) ? 8 : 16; + } + if (bd != 0x00) { + sign_found |= (bd < 0x80) ? 64 : 128; + } + predict = palette[i]; + } + return (sign_found & (sign_found << 1)) != 0; // two consequent signs. } +// ----------------------------------------------------------------------------- +// Palette + // If number of colors in the image is less than or equal to MAX_PALETTE_SIZE, // creates a palette and returns true, else returns false. static int AnalyzeAndCreatePalette(const WebPPicture* const pic, + int low_effort, uint32_t palette[MAX_PALETTE_SIZE], int* const palette_size) { int i, x, y, key; @@ -85,7 +165,7 @@ static int AnalyzeAndCreatePalette(const WebPPicture* const pic, argb += pic->argb_stride; } - // TODO(skal): could we reuse in_use[] to speed up ApplyPalette()? + // TODO(skal): could we reuse in_use[] to speed up EncodePalette()? num_colors = 0; for (i = 0; i < (int)(sizeof(in_use) / sizeof(in_use[0])); ++i) { if (in_use[i]) { @@ -93,106 +173,272 @@ static int AnalyzeAndCreatePalette(const WebPPicture* const pic, ++num_colors; } } - - qsort(palette, num_colors, sizeof(*palette), CompareColors); *palette_size = num_colors; + qsort(palette, num_colors, sizeof(*palette), PaletteCompareColorsForQsort); + if (!low_effort && PaletteHasNonMonotonousDeltas(palette, num_colors)) { + GreedyMinimizeDeltas(palette, num_colors); + } return 1; } +// These five modes are evaluated and their respective entropy is computed. +typedef enum { + kDirect = 0, + kSpatial = 1, + kSubGreen = 2, + kSpatialSubGreen = 3, + kPalette = 4, + kNumEntropyIx = 5 +} EntropyIx; + +typedef enum { + kHistoAlpha = 0, + kHistoAlphaPred, + kHistoGreen, + kHistoGreenPred, + kHistoRed, + kHistoRedPred, + kHistoBlue, + kHistoBluePred, + kHistoRedSubGreen, + kHistoRedPredSubGreen, + kHistoBlueSubGreen, + kHistoBluePredSubGreen, + kHistoPalette, + kHistoTotal // Must be last. +} HistoIx; + +static void AddSingleSubGreen(uint32_t p, uint32_t* r, uint32_t* b) { + const uint32_t green = p >> 8; // The upper bits are masked away later. + ++r[((p >> 16) - green) & 0xff]; + ++b[(p - green) & 0xff]; +} + +static void AddSingle(uint32_t p, + uint32_t* a, uint32_t* r, uint32_t* g, uint32_t* b) { + ++a[p >> 24]; + ++r[(p >> 16) & 0xff]; + ++g[(p >> 8) & 0xff]; + ++b[(p & 0xff)]; +} + static int AnalyzeEntropy(const uint32_t* argb, int width, int height, int argb_stride, - double* const nonpredicted_bits, - double* const predicted_bits) { - int x, y; - const uint32_t* last_line = NULL; - uint32_t last_pix = argb[0]; // so we're sure that pix_diff == 0 - - VP8LHistogram* nonpredicted = NULL; - VP8LHistogram* predicted = - (VP8LHistogram*)malloc(2 * sizeof(*predicted)); - if (predicted == NULL) return 0; - nonpredicted = predicted + 1; - - VP8LHistogramInit(predicted, 0); - VP8LHistogramInit(nonpredicted, 0); - for (y = 0; y < height; ++y) { - for (x = 0; x < width; ++x) { - const uint32_t pix = argb[x]; - const uint32_t pix_diff = VP8LSubPixels(pix, last_pix); - if (pix_diff == 0) continue; - if (last_line != NULL && pix == last_line[x]) { - continue; + int use_palette, + EntropyIx* const min_entropy_ix, + int* const red_and_blue_always_zero) { + // Allocate histogram set with cache_bits = 0. + uint32_t* const histo = + (uint32_t*)WebPSafeCalloc(kHistoTotal, sizeof(*histo) * 256); + if (histo != NULL) { + int i, x, y; + const uint32_t* prev_row = argb; + const uint32_t* curr_row = argb + argb_stride; + for (y = 1; y < height; ++y) { + uint32_t prev_pix = curr_row[0]; + for (x = 1; x < width; ++x) { + const uint32_t pix = curr_row[x]; + const uint32_t pix_diff = VP8LSubPixels(pix, prev_pix); + if ((pix_diff == 0) || (pix == prev_row[x])) continue; + prev_pix = pix; + AddSingle(pix, + &histo[kHistoAlpha * 256], + &histo[kHistoRed * 256], + &histo[kHistoGreen * 256], + &histo[kHistoBlue * 256]); + AddSingle(pix_diff, + &histo[kHistoAlphaPred * 256], + &histo[kHistoRedPred * 256], + &histo[kHistoGreenPred * 256], + &histo[kHistoBluePred * 256]); + AddSingleSubGreen(pix, + &histo[kHistoRedSubGreen * 256], + &histo[kHistoBlueSubGreen * 256]); + AddSingleSubGreen(pix_diff, + &histo[kHistoRedPredSubGreen * 256], + &histo[kHistoBluePredSubGreen * 256]); + { + // Approximate the palette by the entropy of the multiplicative hash. + const int hash = ((pix + (pix >> 19)) * 0x39c5fba7) >> 24; + ++histo[kHistoPalette * 256 + (hash & 0xff)]; + } + } + prev_row = curr_row; + curr_row += argb_stride; + } + { + double entropy_comp[kHistoTotal]; + double entropy[kNumEntropyIx]; + EntropyIx k; + EntropyIx last_mode_to_analyze = + use_palette ? kPalette : kSpatialSubGreen; + int j; + // Let's add one zero to the predicted histograms. The zeros are removed + // too efficiently by the pix_diff == 0 comparison, at least one of the + // zeros is likely to exist. + ++histo[kHistoRedPredSubGreen * 256]; + ++histo[kHistoBluePredSubGreen * 256]; + ++histo[kHistoRedPred * 256]; + ++histo[kHistoGreenPred * 256]; + ++histo[kHistoBluePred * 256]; + ++histo[kHistoAlphaPred * 256]; + + for (j = 0; j < kHistoTotal; ++j) { + entropy_comp[j] = VP8LBitsEntropy(&histo[j * 256], 256, NULL); + } + entropy[kDirect] = entropy_comp[kHistoAlpha] + + entropy_comp[kHistoRed] + + entropy_comp[kHistoGreen] + + entropy_comp[kHistoBlue]; + entropy[kSpatial] = entropy_comp[kHistoAlphaPred] + + entropy_comp[kHistoRedPred] + + entropy_comp[kHistoGreenPred] + + entropy_comp[kHistoBluePred]; + entropy[kSubGreen] = entropy_comp[kHistoAlpha] + + entropy_comp[kHistoRedSubGreen] + + entropy_comp[kHistoGreen] + + entropy_comp[kHistoBlueSubGreen]; + entropy[kSpatialSubGreen] = entropy_comp[kHistoAlphaPred] + + entropy_comp[kHistoRedPredSubGreen] + + entropy_comp[kHistoGreenPred] + + entropy_comp[kHistoBluePredSubGreen]; + // Palette mode seems more efficient in a breakeven case. Bias with 1.0. + entropy[kPalette] = entropy_comp[kHistoPalette] - 1.0; + + *min_entropy_ix = kDirect; + for (k = kDirect + 1; k <= last_mode_to_analyze; ++k) { + if (entropy[*min_entropy_ix] > entropy[k]) { + *min_entropy_ix = k; + } } - last_pix = pix; + *red_and_blue_always_zero = 1; + // Let's check if the histogram of the chosen entropy mode has + // non-zero red and blue values. If all are zero, we can later skip + // the cross color optimization. { - const PixOrCopy pix_token = PixOrCopyCreateLiteral(pix); - const PixOrCopy pix_diff_token = PixOrCopyCreateLiteral(pix_diff); - VP8LHistogramAddSinglePixOrCopy(nonpredicted, &pix_token); - VP8LHistogramAddSinglePixOrCopy(predicted, &pix_diff_token); + static const uint8_t kHistoPairs[5][2] = { + { kHistoRed, kHistoBlue }, + { kHistoRedPred, kHistoBluePred }, + { kHistoRedSubGreen, kHistoBlueSubGreen }, + { kHistoRedPredSubGreen, kHistoBluePredSubGreen }, + { kHistoRed, kHistoBlue } + }; + const uint32_t* const red_histo = + &histo[256 * kHistoPairs[*min_entropy_ix][0]]; + const uint32_t* const blue_histo = + &histo[256 * kHistoPairs[*min_entropy_ix][1]]; + for (i = 1; i < 256; ++i) { + if ((red_histo[i] | blue_histo[i]) != 0) { + *red_and_blue_always_zero = 0; + break; + } + } } } - last_line = argb; - argb += argb_stride; + free(histo); + return 1; + } else { + return 0; } - *nonpredicted_bits = VP8LHistogramEstimateBitsBulk(nonpredicted); - *predicted_bits = VP8LHistogramEstimateBitsBulk(predicted); - free(predicted); - return 1; } -static int VP8LEncAnalyze(VP8LEncoder* const enc, WebPImageHint image_hint) { +static int GetHistoBits(int method, int use_palette, int width, int height) { + // Make tile size a function of encoding method (Range: 0 to 6). + int histo_bits = (use_palette ? 9 : 7) - method; + while (1) { + const int huff_image_size = VP8LSubSampleSize(width, histo_bits) * + VP8LSubSampleSize(height, histo_bits); + if (huff_image_size <= MAX_HUFF_IMAGE_SIZE) break; + ++histo_bits; + } + return (histo_bits < MIN_HUFFMAN_BITS) ? MIN_HUFFMAN_BITS : + (histo_bits > MAX_HUFFMAN_BITS) ? MAX_HUFFMAN_BITS : histo_bits; +} + +static int GetTransformBits(int method, int histo_bits) { + const int max_transform_bits = (method < 4) ? 6 : (method > 4) ? 4 : 5; + return (histo_bits > max_transform_bits) ? max_transform_bits : histo_bits; +} + +static int AnalyzeAndInit(VP8LEncoder* const enc) { const WebPPicture* const pic = enc->pic_; + const int width = pic->width; + const int height = pic->height; + const int pix_cnt = width * height; + const WebPConfig* const config = enc->config_; + const int method = config->method; + const int low_effort = (config->method == 0); + // we round the block size up, so we're guaranteed to have + // at max MAX_REFS_BLOCK_PER_IMAGE blocks used: + int refs_block_size = (pix_cnt - 1) / MAX_REFS_BLOCK_PER_IMAGE + 1; assert(pic != NULL && pic->argb != NULL); + enc->use_cross_color_ = 0; + enc->use_predict_ = 0; + enc->use_subtract_green_ = 0; enc->use_palette_ = - AnalyzeAndCreatePalette(pic, enc->palette_, &enc->palette_size_); - - if (image_hint == WEBP_HINT_GRAPH) { - if (enc->use_palette_ && enc->palette_size_ < MAX_COLORS_FOR_GRAPH) { - enc->use_palette_ = 0; + AnalyzeAndCreatePalette(pic, low_effort, + enc->palette_, &enc->palette_size_); + + // TODO(jyrki): replace the decision to be based on an actual estimate + // of entropy, or even spatial variance of entropy. + enc->histo_bits_ = GetHistoBits(method, enc->use_palette_, + pic->width, pic->height); + enc->transform_bits_ = GetTransformBits(method, enc->histo_bits_); + + if (low_effort) { + // AnalyzeEntropy is somewhat slow. + enc->use_predict_ = !enc->use_palette_; + enc->use_subtract_green_ = !enc->use_palette_; + enc->use_cross_color_ = 0; + } else { + int red_and_blue_always_zero; + EntropyIx min_entropy_ix; + if (!AnalyzeEntropy(pic->argb, width, height, pic->argb_stride, + enc->use_palette_, &min_entropy_ix, + &red_and_blue_always_zero)) { + return 0; } + enc->use_palette_ = (min_entropy_ix == kPalette); + enc->use_subtract_green_ = + (min_entropy_ix == kSubGreen) || (min_entropy_ix == kSpatialSubGreen); + enc->use_predict_ = + (min_entropy_ix == kSpatial) || (min_entropy_ix == kSpatialSubGreen); + enc->use_cross_color_ = red_and_blue_always_zero ? 0 : enc->use_predict_; } - if (!enc->use_palette_) { - if (image_hint == WEBP_HINT_PHOTO) { - enc->use_predict_ = 1; - enc->use_cross_color_ = 1; - } else { - double non_pred_entropy, pred_entropy; - if (!AnalyzeEntropy(pic->argb, pic->width, pic->height, pic->argb_stride, - &non_pred_entropy, &pred_entropy)) { - return 0; - } - if (pred_entropy < 0.95 * non_pred_entropy) { - enc->use_predict_ = 1; - // TODO(vikasa): Observed some correlation of cross_color transform with - // predict. Need to investigate this further and add separate heuristic - // for setting use_cross_color flag. - enc->use_cross_color_ = 1; - } - } - } + if (!VP8LHashChainInit(&enc->hash_chain_, pix_cnt)) return 0; + + // palette-friendly input typically uses less literals + // -> reduce block size a bit + if (enc->use_palette_) refs_block_size /= 2; + VP8LBackwardRefsInit(&enc->refs_[0], refs_block_size); + VP8LBackwardRefsInit(&enc->refs_[1], refs_block_size); return 1; } +// Returns false in case of memory error. static int GetHuffBitLengthsAndCodes( const VP8LHistogramSet* const histogram_image, HuffmanTreeCode* const huffman_codes) { int i, k; - int ok = 1; + int ok = 0; uint64_t total_length_size = 0; uint8_t* mem_buf = NULL; const int histogram_image_size = histogram_image->size; + int max_num_symbols = 0; + uint8_t* buf_rle = NULL; + HuffmanTree* huff_tree = NULL; // Iterate over all histograms and get the aggregate number of codes used. for (i = 0; i < histogram_image_size; ++i) { const VP8LHistogram* const histo = histogram_image->histograms[i]; HuffmanTreeCode* const codes = &huffman_codes[5 * i]; for (k = 0; k < 5; ++k) { - const int num_symbols = (k == 0) ? VP8LHistogramNumCodes(histo) - : (k == 4) ? NUM_DISTANCE_CODES - : 256; + const int num_symbols = + (k == 0) ? VP8LHistogramNumCodes(histo->palette_code_bits_) : + (k == 4) ? NUM_DISTANCE_CODES : 256; codes[k].num_symbols = num_symbols; total_length_size += num_symbols; } @@ -204,10 +450,8 @@ static int GetHuffBitLengthsAndCodes( uint8_t* lengths; mem_buf = (uint8_t*)WebPSafeCalloc(total_length_size, sizeof(*lengths) + sizeof(*codes)); - if (mem_buf == NULL) { - ok = 0; - goto End; - } + if (mem_buf == NULL) goto End; + codes = (uint16_t*)mem_buf; lengths = (uint8_t*)&codes[total_length_size]; for (i = 0; i < 5 * histogram_image_size; ++i) { @@ -216,22 +460,35 @@ static int GetHuffBitLengthsAndCodes( huffman_codes[i].code_lengths = lengths; codes += bit_length; lengths += bit_length; + if (max_num_symbols < bit_length) { + max_num_symbols = bit_length; + } } } + buf_rle = (uint8_t*)WebPSafeMalloc(1ULL, max_num_symbols); + huff_tree = (HuffmanTree*)WebPSafeMalloc(3ULL * max_num_symbols, + sizeof(*huff_tree)); + if (buf_rle == NULL || huff_tree == NULL) goto End; + // Create Huffman trees. for (i = 0; i < histogram_image_size; ++i) { HuffmanTreeCode* const codes = &huffman_codes[5 * i]; VP8LHistogram* const histo = histogram_image->histograms[i]; - ok = ok && VP8LCreateHuffmanTree(histo->literal_, 15, codes + 0); - ok = ok && VP8LCreateHuffmanTree(histo->red_, 15, codes + 1); - ok = ok && VP8LCreateHuffmanTree(histo->blue_, 15, codes + 2); - ok = ok && VP8LCreateHuffmanTree(histo->alpha_, 15, codes + 3); - ok = ok && VP8LCreateHuffmanTree(histo->distance_, 15, codes + 4); + VP8LCreateHuffmanTree(histo->literal_, 15, buf_rle, huff_tree, codes + 0); + VP8LCreateHuffmanTree(histo->red_, 15, buf_rle, huff_tree, codes + 1); + VP8LCreateHuffmanTree(histo->blue_, 15, buf_rle, huff_tree, codes + 2); + VP8LCreateHuffmanTree(histo->alpha_, 15, buf_rle, huff_tree, codes + 3); + VP8LCreateHuffmanTree(histo->distance_, 15, buf_rle, huff_tree, codes + 4); } - + ok = 1; End: - if (!ok) free(mem_buf); + WebPSafeFree(huff_tree); + WebPSafeFree(buf_rle); + if (!ok) { + WebPSafeFree(mem_buf); + memset(huffman_codes, 0, 5 * histogram_image_size * sizeof(*huffman_codes)); + } return ok; } @@ -251,9 +508,9 @@ static void StoreHuffmanTreeOfHuffmanTreeToBitMask( break; } } - VP8LWriteBits(bw, 4, codes_to_store - 4); + VP8LPutBits(bw, codes_to_store - 4, 4); for (i = 0; i < codes_to_store; ++i) { - VP8LWriteBits(bw, 3, code_length_bitdepth[kStorageOrder[i]]); + VP8LPutBits(bw, code_length_bitdepth[kStorageOrder[i]], 3); } } @@ -281,49 +538,46 @@ static void StoreHuffmanTreeToBitMask( for (i = 0; i < num_tokens; ++i) { const int ix = tokens[i].code; const int extra_bits = tokens[i].extra_bits; - VP8LWriteBits(bw, huffman_code->code_lengths[ix], huffman_code->codes[ix]); + VP8LPutBits(bw, huffman_code->codes[ix], huffman_code->code_lengths[ix]); switch (ix) { case 16: - VP8LWriteBits(bw, 2, extra_bits); + VP8LPutBits(bw, extra_bits, 2); break; case 17: - VP8LWriteBits(bw, 3, extra_bits); + VP8LPutBits(bw, extra_bits, 3); break; case 18: - VP8LWriteBits(bw, 7, extra_bits); + VP8LPutBits(bw, extra_bits, 7); break; } } } -static int StoreFullHuffmanCode(VP8LBitWriter* const bw, - const HuffmanTreeCode* const tree) { - int ok = 0; +// 'huff_tree' and 'tokens' are pre-alloacted buffers. +static void StoreFullHuffmanCode(VP8LBitWriter* const bw, + HuffmanTree* const huff_tree, + HuffmanTreeToken* const tokens, + const HuffmanTreeCode* const tree) { uint8_t code_length_bitdepth[CODE_LENGTH_CODES] = { 0 }; uint16_t code_length_bitdepth_symbols[CODE_LENGTH_CODES] = { 0 }; const int max_tokens = tree->num_symbols; int num_tokens; HuffmanTreeCode huffman_code; - HuffmanTreeToken* const tokens = - (HuffmanTreeToken*)WebPSafeMalloc((uint64_t)max_tokens, sizeof(*tokens)); - if (tokens == NULL) return 0; - huffman_code.num_symbols = CODE_LENGTH_CODES; huffman_code.code_lengths = code_length_bitdepth; huffman_code.codes = code_length_bitdepth_symbols; - VP8LWriteBits(bw, 1, 0); + VP8LPutBits(bw, 0, 1); num_tokens = VP8LCreateCompressedHuffmanTree(tree, tokens, max_tokens); { - int histogram[CODE_LENGTH_CODES] = { 0 }; + uint32_t histogram[CODE_LENGTH_CODES] = { 0 }; + uint8_t buf_rle[CODE_LENGTH_CODES] = { 0 }; int i; for (i = 0; i < num_tokens; ++i) { ++histogram[tokens[i].code]; } - if (!VP8LCreateHuffmanTree(histogram, 7, &huffman_code)) { - goto End; - } + VP8LCreateHuffmanTree(histogram, 7, buf_rle, huff_tree, &huffman_code); } StoreHuffmanTreeOfHuffmanTreeToBitMask(bw, code_length_bitdepth); @@ -350,24 +604,23 @@ static int StoreFullHuffmanCode(VP8LBitWriter* const bw, } write_trimmed_length = (trimmed_length > 1 && trailing_zero_bits > 12); length = write_trimmed_length ? trimmed_length : num_tokens; - VP8LWriteBits(bw, 1, write_trimmed_length); + VP8LPutBits(bw, write_trimmed_length, 1); if (write_trimmed_length) { const int nbits = VP8LBitsLog2Ceiling(trimmed_length - 1); const int nbitpairs = (nbits == 0) ? 1 : (nbits + 1) / 2; - VP8LWriteBits(bw, 3, nbitpairs - 1); + VP8LPutBits(bw, nbitpairs - 1, 3); assert(trimmed_length >= 2); - VP8LWriteBits(bw, nbitpairs * 2, trimmed_length - 2); + VP8LPutBits(bw, trimmed_length - 2, nbitpairs * 2); } StoreHuffmanTreeToBitMask(bw, tokens, length, &huffman_code); } - ok = 1; - End: - free(tokens); - return ok; } -static int StoreHuffmanCode(VP8LBitWriter* const bw, - const HuffmanTreeCode* const huffman_code) { +// 'huff_tree' and 'tokens' are pre-alloacted buffers. +static void StoreHuffmanCode(VP8LBitWriter* const bw, + HuffmanTree* const huff_tree, + HuffmanTreeToken* const tokens, + const HuffmanTreeCode* const huffman_code) { int i; int count = 0; int symbols[2] = { 0, 0 }; @@ -384,163 +637,248 @@ static int StoreHuffmanCode(VP8LBitWriter* const bw, if (count == 0) { // emit minimal tree for empty cases // bits: small tree marker: 1, count-1: 0, large 8-bit code: 0, code: 0 - VP8LWriteBits(bw, 4, 0x01); - return 1; + VP8LPutBits(bw, 0x01, 4); } else if (count <= 2 && symbols[0] < kMaxSymbol && symbols[1] < kMaxSymbol) { - VP8LWriteBits(bw, 1, 1); // Small tree marker to encode 1 or 2 symbols. - VP8LWriteBits(bw, 1, count - 1); + VP8LPutBits(bw, 1, 1); // Small tree marker to encode 1 or 2 symbols. + VP8LPutBits(bw, count - 1, 1); if (symbols[0] <= 1) { - VP8LWriteBits(bw, 1, 0); // Code bit for small (1 bit) symbol value. - VP8LWriteBits(bw, 1, symbols[0]); + VP8LPutBits(bw, 0, 1); // Code bit for small (1 bit) symbol value. + VP8LPutBits(bw, symbols[0], 1); } else { - VP8LWriteBits(bw, 1, 1); - VP8LWriteBits(bw, 8, symbols[0]); + VP8LPutBits(bw, 1, 1); + VP8LPutBits(bw, symbols[0], 8); } if (count == 2) { - VP8LWriteBits(bw, 8, symbols[1]); + VP8LPutBits(bw, symbols[1], 8); } - return 1; } else { - return StoreFullHuffmanCode(bw, huffman_code); + StoreFullHuffmanCode(bw, huff_tree, tokens, huffman_code); } } -static void WriteHuffmanCode(VP8LBitWriter* const bw, - const HuffmanTreeCode* const code, int index) { - const int depth = code->code_lengths[index]; - const int symbol = code->codes[index]; - VP8LWriteBits(bw, depth, symbol); +static WEBP_INLINE void WriteHuffmanCode(VP8LBitWriter* const bw, + const HuffmanTreeCode* const code, + int code_index) { + const int depth = code->code_lengths[code_index]; + const int symbol = code->codes[code_index]; + VP8LPutBits(bw, symbol, depth); } -static void StoreImageToBitMask( +static WEBP_INLINE void WriteHuffmanCodeWithExtraBits( + VP8LBitWriter* const bw, + const HuffmanTreeCode* const code, + int code_index, + int bits, + int n_bits) { + const int depth = code->code_lengths[code_index]; + const int symbol = code->codes[code_index]; + VP8LPutBits(bw, (bits << depth) | symbol, depth + n_bits); +} + +static WebPEncodingError StoreImageToBitMask( VP8LBitWriter* const bw, int width, int histo_bits, - const VP8LBackwardRefs* const refs, + VP8LBackwardRefs* const refs, const uint16_t* histogram_symbols, const HuffmanTreeCode* const huffman_codes) { + const int histo_xsize = histo_bits ? VP8LSubSampleSize(width, histo_bits) : 1; + const int tile_mask = (histo_bits == 0) ? 0 : -(1 << histo_bits); // x and y trace the position in the image. int x = 0; int y = 0; - const int histo_xsize = histo_bits ? VP8LSubSampleSize(width, histo_bits) : 1; - int i; - for (i = 0; i < refs->size; ++i) { - const PixOrCopy* const v = &refs->refs[i]; - const int histogram_ix = histogram_symbols[histo_bits ? - (y >> histo_bits) * histo_xsize + - (x >> histo_bits) : 0]; - const HuffmanTreeCode* const codes = huffman_codes + 5 * histogram_ix; - if (PixOrCopyIsCacheIdx(v)) { - const int code = PixOrCopyCacheIdx(v); - const int literal_ix = 256 + NUM_LENGTH_CODES + code; - WriteHuffmanCode(bw, codes, literal_ix); - } else if (PixOrCopyIsLiteral(v)) { + int tile_x = x & tile_mask; + int tile_y = y & tile_mask; + int histogram_ix = histogram_symbols[0]; + const HuffmanTreeCode* codes = huffman_codes + 5 * histogram_ix; + VP8LRefsCursor c = VP8LRefsCursorInit(refs); + while (VP8LRefsCursorOk(&c)) { + const PixOrCopy* const v = c.cur_pos; + if ((tile_x != (x & tile_mask)) || (tile_y != (y & tile_mask))) { + tile_x = x & tile_mask; + tile_y = y & tile_mask; + histogram_ix = histogram_symbols[(y >> histo_bits) * histo_xsize + + (x >> histo_bits)]; + codes = huffman_codes + 5 * histogram_ix; + } + if (PixOrCopyIsLiteral(v)) { static const int order[] = { 1, 2, 0, 3 }; int k; for (k = 0; k < 4; ++k) { const int code = PixOrCopyLiteral(v, order[k]); WriteHuffmanCode(bw, codes + k, code); } + } else if (PixOrCopyIsCacheIdx(v)) { + const int code = PixOrCopyCacheIdx(v); + const int literal_ix = 256 + NUM_LENGTH_CODES + code; + WriteHuffmanCode(bw, codes, literal_ix); } else { int bits, n_bits; - int code, distance; + int code; - PrefixEncode(v->len, &code, &n_bits, &bits); - WriteHuffmanCode(bw, codes, 256 + code); - VP8LWriteBits(bw, n_bits, bits); + const int distance = PixOrCopyDistance(v); + VP8LPrefixEncode(v->len, &code, &n_bits, &bits); + WriteHuffmanCodeWithExtraBits(bw, codes, 256 + code, bits, n_bits); - distance = PixOrCopyDistance(v); - PrefixEncode(distance, &code, &n_bits, &bits); + // Don't write the distance with the extra bits code since + // the distance can be up to 18 bits of extra bits, and the prefix + // 15 bits, totaling to 33, and our PutBits only supports up to 32 bits. + // TODO(jyrki): optimize this further. + VP8LPrefixEncode(distance, &code, &n_bits, &bits); WriteHuffmanCode(bw, codes + 4, code); - VP8LWriteBits(bw, n_bits, bits); + VP8LPutBits(bw, bits, n_bits); } x += PixOrCopyLength(v); while (x >= width) { x -= width; ++y; } + VP8LRefsCursorNext(&c); } + return bw->error_ ? VP8_ENC_ERROR_OUT_OF_MEMORY : VP8_ENC_OK; } // Special case of EncodeImageInternal() for cache-bits=0, histo_bits=31 -static int EncodeImageNoHuffman(VP8LBitWriter* const bw, - const uint32_t* const argb, - int width, int height, int quality) { +static WebPEncodingError EncodeImageNoHuffman(VP8LBitWriter* const bw, + const uint32_t* const argb, + VP8LHashChain* const hash_chain, + VP8LBackwardRefs refs_array[2], + int width, int height, + int quality) { int i; - int ok = 0; - VP8LBackwardRefs refs; + int max_tokens = 0; + WebPEncodingError err = VP8_ENC_OK; + VP8LBackwardRefs* refs; + HuffmanTreeToken* tokens = NULL; HuffmanTreeCode huffman_codes[5] = { { 0, NULL, NULL } }; const uint16_t histogram_symbols[1] = { 0 }; // only one tree, one symbol - VP8LHistogramSet* const histogram_image = VP8LAllocateHistogramSet(1, 0); - if (histogram_image == NULL) return 0; + int cache_bits = 0; + VP8LHistogramSet* histogram_image = NULL; + HuffmanTree* const huff_tree = (HuffmanTree*)WebPSafeMalloc( + 3ULL * CODE_LENGTH_CODES, sizeof(*huff_tree)); + if (huff_tree == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } // Calculate backward references from ARGB image. - if (!VP8LGetBackwardReferences(width, height, argb, quality, 0, 1, &refs)) { + refs = VP8LGetBackwardReferences(width, height, argb, quality, 0, &cache_bits, + hash_chain, refs_array); + if (refs == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; goto Error; } + histogram_image = VP8LAllocateHistogramSet(1, cache_bits); + if (histogram_image == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + // Build histogram image and symbols from backward references. - VP8LHistogramStoreRefs(&refs, histogram_image->histograms[0]); + VP8LHistogramStoreRefs(refs, histogram_image->histograms[0]); // Create Huffman bit lengths and codes for each histogram image. assert(histogram_image->size == 1); if (!GetHuffBitLengthsAndCodes(histogram_image, huffman_codes)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; goto Error; } // No color cache, no Huffman image. - VP8LWriteBits(bw, 1, 0); + VP8LPutBits(bw, 0, 1); - // Store Huffman codes. + // Find maximum number of symbols for the huffman tree-set. for (i = 0; i < 5; ++i) { HuffmanTreeCode* const codes = &huffman_codes[i]; - if (!StoreHuffmanCode(bw, codes)) { - goto Error; + if (max_tokens < codes->num_symbols) { + max_tokens = codes->num_symbols; } + } + + tokens = (HuffmanTreeToken*)WebPSafeMalloc(max_tokens, sizeof(*tokens)); + if (tokens == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + // Store Huffman codes. + for (i = 0; i < 5; ++i) { + HuffmanTreeCode* const codes = &huffman_codes[i]; + StoreHuffmanCode(bw, huff_tree, tokens, codes); ClearHuffmanTreeIfOnlyOneSymbol(codes); } // Store actual literals. - StoreImageToBitMask(bw, width, 0, &refs, histogram_symbols, huffman_codes); - ok = 1; + err = StoreImageToBitMask(bw, width, 0, refs, histogram_symbols, + huffman_codes); Error: - free(histogram_image); - VP8LClearBackwardRefs(&refs); - free(huffman_codes[0].codes); - return ok; + WebPSafeFree(tokens); + WebPSafeFree(huff_tree); + VP8LFreeHistogramSet(histogram_image); + WebPSafeFree(huffman_codes[0].codes); + return err; } -static int EncodeImageInternal(VP8LBitWriter* const bw, - const uint32_t* const argb, - int width, int height, int quality, - int cache_bits, int histogram_bits) { - int ok = 0; - const int use_2d_locality = 1; - const int use_color_cache = (cache_bits > 0); +static WebPEncodingError EncodeImageInternal(VP8LBitWriter* const bw, + const uint32_t* const argb, + VP8LHashChain* const hash_chain, + VP8LBackwardRefs refs_array[2], + int width, int height, int quality, + int low_effort, int* cache_bits, + int histogram_bits, + size_t init_byte_position, + int* const hdr_size, + int* const data_size) { + WebPEncodingError err = VP8_ENC_OK; const uint32_t histogram_image_xysize = VP8LSubSampleSize(width, histogram_bits) * VP8LSubSampleSize(height, histogram_bits); - VP8LHistogramSet* histogram_image = - VP8LAllocateHistogramSet(histogram_image_xysize, 0); + VP8LHistogramSet* histogram_image = NULL; + VP8LHistogramSet* tmp_histos = NULL; int histogram_image_size = 0; size_t bit_array_size = 0; + HuffmanTree* huff_tree = NULL; + HuffmanTreeToken* tokens = NULL; HuffmanTreeCode* huffman_codes = NULL; VP8LBackwardRefs refs; + VP8LBackwardRefs* best_refs; uint16_t* const histogram_symbols = - (uint16_t*)WebPSafeMalloc((uint64_t)histogram_image_xysize, + (uint16_t*)WebPSafeMalloc(histogram_image_xysize, sizeof(*histogram_symbols)); assert(histogram_bits >= MIN_HUFFMAN_BITS); assert(histogram_bits <= MAX_HUFFMAN_BITS); - if (histogram_image == NULL || histogram_symbols == NULL) goto Error; + assert(hdr_size != NULL); + assert(data_size != NULL); + VP8LBackwardRefsInit(&refs, refs_array[0].block_size_); + if (histogram_symbols == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + *cache_bits = MAX_COLOR_CACHE_BITS; + // 'best_refs' is the reference to the best backward refs and points to one + // of refs_array[0] or refs_array[1]. // Calculate backward references from ARGB image. - if (!VP8LGetBackwardReferences(width, height, argb, quality, cache_bits, - use_2d_locality, &refs)) { + best_refs = VP8LGetBackwardReferences(width, height, argb, quality, + low_effort, cache_bits, hash_chain, + refs_array); + if (best_refs == NULL || !VP8LBackwardRefsCopy(best_refs, &refs)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; goto Error; } + histogram_image = + VP8LAllocateHistogramSet(histogram_image_xysize, *cache_bits); + tmp_histos = VP8LAllocateHistogramSet(2, *cache_bits); + if (histogram_image == NULL || tmp_histos == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + // Build histogram image and symbols from backward references. - if (!VP8LGetHistoImageSymbols(width, height, &refs, - quality, histogram_bits, cache_bits, - histogram_image, - histogram_symbols)) { + if (!VP8LGetHistoImageSymbols(width, height, &refs, quality, low_effort, + histogram_bits, *cache_bits, histogram_image, + tmp_histos, histogram_symbols)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; goto Error; } // Create Huffman bit lengths and codes for each histogram image. @@ -548,171 +886,167 @@ static int EncodeImageInternal(VP8LBitWriter* const bw, bit_array_size = 5 * histogram_image_size; huffman_codes = (HuffmanTreeCode*)WebPSafeCalloc(bit_array_size, sizeof(*huffman_codes)); + // Note: some histogram_image entries may point to tmp_histos[], so the latter + // need to outlive the following call to GetHuffBitLengthsAndCodes(). if (huffman_codes == NULL || !GetHuffBitLengthsAndCodes(histogram_image, huffman_codes)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; goto Error; } + // Free combined histograms. + VP8LFreeHistogramSet(histogram_image); + histogram_image = NULL; + + // Free scratch histograms. + VP8LFreeHistogramSet(tmp_histos); + tmp_histos = NULL; // Color Cache parameters. - VP8LWriteBits(bw, 1, use_color_cache); - if (use_color_cache) { - VP8LWriteBits(bw, 4, cache_bits); + if (*cache_bits > 0) { + VP8LPutBits(bw, 1, 1); + VP8LPutBits(bw, *cache_bits, 4); + } else { + VP8LPutBits(bw, 0, 1); } // Huffman image + meta huffman. { const int write_histogram_image = (histogram_image_size > 1); - VP8LWriteBits(bw, 1, write_histogram_image); + VP8LPutBits(bw, write_histogram_image, 1); if (write_histogram_image) { uint32_t* const histogram_argb = - (uint32_t*)WebPSafeMalloc((uint64_t)histogram_image_xysize, + (uint32_t*)WebPSafeMalloc(histogram_image_xysize, sizeof(*histogram_argb)); int max_index = 0; uint32_t i; - if (histogram_argb == NULL) goto Error; + if (histogram_argb == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } for (i = 0; i < histogram_image_xysize; ++i) { - const int index = histogram_symbols[i] & 0xffff; - histogram_argb[i] = 0xff000000 | (index << 8); - if (index >= max_index) { - max_index = index + 1; + const int symbol_index = histogram_symbols[i] & 0xffff; + histogram_argb[i] = (symbol_index << 8); + if (symbol_index >= max_index) { + max_index = symbol_index + 1; } } histogram_image_size = max_index; - VP8LWriteBits(bw, 3, histogram_bits - 2); - ok = EncodeImageNoHuffman(bw, histogram_argb, - VP8LSubSampleSize(width, histogram_bits), - VP8LSubSampleSize(height, histogram_bits), - quality); - free(histogram_argb); - if (!ok) goto Error; + VP8LPutBits(bw, histogram_bits - 2, 3); + err = EncodeImageNoHuffman(bw, histogram_argb, hash_chain, refs_array, + VP8LSubSampleSize(width, histogram_bits), + VP8LSubSampleSize(height, histogram_bits), + quality); + WebPSafeFree(histogram_argb); + if (err != VP8_ENC_OK) goto Error; } } // Store Huffman codes. { int i; + int max_tokens = 0; + huff_tree = (HuffmanTree*)WebPSafeMalloc(3ULL * CODE_LENGTH_CODES, + sizeof(*huff_tree)); + if (huff_tree == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + // Find maximum number of symbols for the huffman tree-set. for (i = 0; i < 5 * histogram_image_size; ++i) { HuffmanTreeCode* const codes = &huffman_codes[i]; - if (!StoreHuffmanCode(bw, codes)) goto Error; + if (max_tokens < codes->num_symbols) { + max_tokens = codes->num_symbols; + } + } + tokens = (HuffmanTreeToken*)WebPSafeMalloc(max_tokens, + sizeof(*tokens)); + if (tokens == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + for (i = 0; i < 5 * histogram_image_size; ++i) { + HuffmanTreeCode* const codes = &huffman_codes[i]; + StoreHuffmanCode(bw, huff_tree, tokens, codes); ClearHuffmanTreeIfOnlyOneSymbol(codes); } } - // Free combined histograms. - free(histogram_image); - histogram_image = NULL; + *hdr_size = (int)(VP8LBitWriterNumBytes(bw) - init_byte_position); // Store actual literals. - StoreImageToBitMask(bw, width, histogram_bits, &refs, - histogram_symbols, huffman_codes); - ok = 1; + err = StoreImageToBitMask(bw, width, histogram_bits, &refs, + histogram_symbols, huffman_codes); + *data_size = + (int)(VP8LBitWriterNumBytes(bw) - init_byte_position - *hdr_size); Error: - if (!ok) free(histogram_image); - - VP8LClearBackwardRefs(&refs); + WebPSafeFree(tokens); + WebPSafeFree(huff_tree); + VP8LFreeHistogramSet(histogram_image); + VP8LFreeHistogramSet(tmp_histos); + VP8LBackwardRefsClear(&refs); if (huffman_codes != NULL) { - free(huffman_codes->codes); - free(huffman_codes); + WebPSafeFree(huffman_codes->codes); + WebPSafeFree(huffman_codes); } - free(histogram_symbols); - return ok; + WebPSafeFree(histogram_symbols); + return err; } // ----------------------------------------------------------------------------- // Transforms -// Check if it would be a good idea to subtract green from red and blue. We -// only impact entropy in red/blue components, don't bother to look at others. -static int EvalAndApplySubtractGreen(VP8LEncoder* const enc, - int width, int height, - VP8LBitWriter* const bw) { - if (!enc->use_palette_) { - int i; - const uint32_t* const argb = enc->argb_; - double bit_cost_before, bit_cost_after; - VP8LHistogram* const histo = (VP8LHistogram*)malloc(sizeof(*histo)); - if (histo == NULL) return 0; - - VP8LHistogramInit(histo, 1); - for (i = 0; i < width * height; ++i) { - const uint32_t c = argb[i]; - ++histo->red_[(c >> 16) & 0xff]; - ++histo->blue_[(c >> 0) & 0xff]; - } - bit_cost_before = VP8LHistogramEstimateBits(histo); - - VP8LHistogramInit(histo, 1); - for (i = 0; i < width * height; ++i) { - const uint32_t c = argb[i]; - const int green = (c >> 8) & 0xff; - ++histo->red_[((c >> 16) - green) & 0xff]; - ++histo->blue_[((c >> 0) - green) & 0xff]; - } - bit_cost_after = VP8LHistogramEstimateBits(histo); - free(histo); - - // Check if subtracting green yields low entropy. - enc->use_subtract_green_ = (bit_cost_after < bit_cost_before); - if (enc->use_subtract_green_) { - VP8LWriteBits(bw, 1, TRANSFORM_PRESENT); - VP8LWriteBits(bw, 2, SUBTRACT_GREEN); - VP8LSubtractGreenFromBlueAndRed(enc->argb_, width * height); - } - } - return 1; +static void ApplySubtractGreen(VP8LEncoder* const enc, int width, int height, + VP8LBitWriter* const bw) { + VP8LPutBits(bw, TRANSFORM_PRESENT, 1); + VP8LPutBits(bw, SUBTRACT_GREEN, 2); + VP8LSubtractGreenFromBlueAndRed(enc->argb_, width * height); } -static int ApplyPredictFilter(const VP8LEncoder* const enc, - int width, int height, int quality, - VP8LBitWriter* const bw) { +static WebPEncodingError ApplyPredictFilter(const VP8LEncoder* const enc, + int width, int height, + int quality, int low_effort, + VP8LBitWriter* const bw) { const int pred_bits = enc->transform_bits_; const int transform_width = VP8LSubSampleSize(width, pred_bits); const int transform_height = VP8LSubSampleSize(height, pred_bits); - VP8LResidualImage(width, height, pred_bits, enc->argb_, enc->argb_scratch_, - enc->transform_data_); - VP8LWriteBits(bw, 1, TRANSFORM_PRESENT); - VP8LWriteBits(bw, 2, PREDICTOR_TRANSFORM); + VP8LResidualImage(width, height, pred_bits, low_effort, enc->argb_, + enc->argb_scratch_, enc->transform_data_); + VP8LPutBits(bw, TRANSFORM_PRESENT, 1); + VP8LPutBits(bw, PREDICTOR_TRANSFORM, 2); assert(pred_bits >= 2); - VP8LWriteBits(bw, 3, pred_bits - 2); - if (!EncodeImageNoHuffman(bw, enc->transform_data_, - transform_width, transform_height, quality)) { - return 0; - } - return 1; + VP8LPutBits(bw, pred_bits - 2, 3); + return EncodeImageNoHuffman(bw, enc->transform_data_, + (VP8LHashChain*)&enc->hash_chain_, + (VP8LBackwardRefs*)enc->refs_, // cast const away + transform_width, transform_height, + quality); } -static int ApplyCrossColorFilter(const VP8LEncoder* const enc, - int width, int height, int quality, - VP8LBitWriter* const bw) { +static WebPEncodingError ApplyCrossColorFilter(const VP8LEncoder* const enc, + int width, int height, + int quality, + VP8LBitWriter* const bw) { const int ccolor_transform_bits = enc->transform_bits_; const int transform_width = VP8LSubSampleSize(width, ccolor_transform_bits); const int transform_height = VP8LSubSampleSize(height, ccolor_transform_bits); - const int step = (quality == 0) ? 32 : 8; - VP8LColorSpaceTransform(width, height, ccolor_transform_bits, step, + VP8LColorSpaceTransform(width, height, ccolor_transform_bits, quality, enc->argb_, enc->transform_data_); - VP8LWriteBits(bw, 1, TRANSFORM_PRESENT); - VP8LWriteBits(bw, 2, CROSS_COLOR_TRANSFORM); + VP8LPutBits(bw, TRANSFORM_PRESENT, 1); + VP8LPutBits(bw, CROSS_COLOR_TRANSFORM, 2); assert(ccolor_transform_bits >= 2); - VP8LWriteBits(bw, 3, ccolor_transform_bits - 2); - if (!EncodeImageNoHuffman(bw, enc->transform_data_, - transform_width, transform_height, quality)) { - return 0; - } - return 1; + VP8LPutBits(bw, ccolor_transform_bits - 2, 3); + return EncodeImageNoHuffman(bw, enc->transform_data_, + (VP8LHashChain*)&enc->hash_chain_, + (VP8LBackwardRefs*)enc->refs_, // cast const away + transform_width, transform_height, + quality); } // ----------------------------------------------------------------------------- -static void PutLE32(uint8_t* const data, uint32_t val) { - data[0] = (val >> 0) & 0xff; - data[1] = (val >> 8) & 0xff; - data[2] = (val >> 16) & 0xff; - data[3] = (val >> 24) & 0xff; -} - static WebPEncodingError WriteRiffHeader(const WebPPicture* const pic, size_t riff_size, size_t vp8l_size) { uint8_t riff[RIFF_HEADER_SIZE + CHUNK_HEADER_SIZE + VP8L_SIGNATURE_SIZE] = { @@ -733,14 +1067,14 @@ static int WriteImageSize(const WebPPicture* const pic, const int height = pic->height - 1; assert(width < WEBP_MAX_DIMENSION && height < WEBP_MAX_DIMENSION); - VP8LWriteBits(bw, VP8L_IMAGE_SIZE_BITS, width); - VP8LWriteBits(bw, VP8L_IMAGE_SIZE_BITS, height); + VP8LPutBits(bw, width, VP8L_IMAGE_SIZE_BITS); + VP8LPutBits(bw, height, VP8L_IMAGE_SIZE_BITS); return !bw->error_; } static int WriteRealAlphaAndVersion(VP8LBitWriter* const bw, int has_alpha) { - VP8LWriteBits(bw, 1, has_alpha); - VP8LWriteBits(bw, VP8L_VERSION_BITS, VP8L_VERSION); + VP8LPutBits(bw, has_alpha, 1); + VP8LPutBits(bw, VP8L_VERSION, VP8L_VERSION_BITS); return !bw->error_; } @@ -780,166 +1114,261 @@ static WebPEncodingError WriteImage(const WebPPicture* const pic, // Allocates the memory for argb (W x H) buffer, 2 rows of context for // prediction and transform data. +// Flags influencing the memory allocated: +// enc->transform_bits_ +// enc->use_predict_, enc->use_cross_color_ static WebPEncodingError AllocateTransformBuffer(VP8LEncoder* const enc, int width, int height) { WebPEncodingError err = VP8_ENC_OK; - const int tile_size = 1 << enc->transform_bits_; - const uint64_t image_size = width * height; - const uint64_t argb_scratch_size = tile_size * width + width; - const uint64_t transform_data_size = - (uint64_t)VP8LSubSampleSize(width, enc->transform_bits_) * - (uint64_t)VP8LSubSampleSize(height, enc->transform_bits_); - const uint64_t total_size = - image_size + argb_scratch_size + transform_data_size; - uint32_t* mem = (uint32_t*)WebPSafeMalloc(total_size, sizeof(*mem)); - if (mem == NULL) { - err = VP8_ENC_ERROR_OUT_OF_MEMORY; - goto Error; + if (enc->argb_ == NULL) { + const int tile_size = 1 << enc->transform_bits_; + const uint64_t image_size = width * height; + // Ensure enough size for tiles, as well as for two scanlines and two + // extra pixels for CopyImageWithPrediction. + const uint64_t argb_scratch_size = + enc->use_predict_ ? tile_size * width + width + 2 : 0; + const int transform_data_size = + (enc->use_predict_ || enc->use_cross_color_) + ? VP8LSubSampleSize(width, enc->transform_bits_) * + VP8LSubSampleSize(height, enc->transform_bits_) + : 0; + const uint64_t total_size = + image_size + WEBP_ALIGN_CST + + argb_scratch_size + WEBP_ALIGN_CST + + (uint64_t)transform_data_size; + uint32_t* mem = (uint32_t*)WebPSafeMalloc(total_size, sizeof(*mem)); + if (mem == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + enc->argb_ = mem; + mem = (uint32_t*)WEBP_ALIGN(mem + image_size); + enc->argb_scratch_ = mem; + mem = (uint32_t*)WEBP_ALIGN(mem + argb_scratch_size); + enc->transform_data_ = mem; + enc->current_width_ = width; } - enc->argb_ = mem; - mem += image_size; - enc->argb_scratch_ = mem; - mem += argb_scratch_size; - enc->transform_data_ = mem; - enc->current_width_ = width; - Error: return err; } -// Bundles multiple (2, 4 or 8) pixels into a single pixel. -// Returns the new xsize. -static void BundleColorMap(const WebPPicture* const pic, - int xbits, uint32_t* bundled_argb, int xs) { - int y; - const int bit_depth = 1 << (3 - xbits); - uint32_t code = 0; - const uint32_t* argb = pic->argb; - const int width = pic->width; - const int height = pic->height; +static void ClearTransformBuffer(VP8LEncoder* const enc) { + WebPSafeFree(enc->argb_); + enc->argb_ = NULL; +} +static WebPEncodingError MakeInputImageCopy(VP8LEncoder* const enc) { + WebPEncodingError err = VP8_ENC_OK; + const WebPPicture* const picture = enc->pic_; + const int width = picture->width; + const int height = picture->height; + int y; + err = AllocateTransformBuffer(enc, width, height); + if (err != VP8_ENC_OK) return err; for (y = 0; y < height; ++y) { - int x; - for (x = 0; x < width; ++x) { - const int mask = (1 << xbits) - 1; - const int xsub = x & mask; - if (xsub == 0) { - code = 0; - } - // TODO(vikasa): simplify the bundling logic. - code |= (argb[x] & 0xff00) << (bit_depth * xsub); - bundled_argb[y * xs + (x >> xbits)] = 0xff000000 | code; - } - argb += pic->argb_stride; + memcpy(enc->argb_ + y * width, + picture->argb + y * picture->argb_stride, + width * sizeof(*enc->argb_)); } + assert(enc->current_width_ == width); + return VP8_ENC_OK; } -// Note: Expects "enc->palette_" to be set properly. -// Also, "enc->palette_" will be modified after this call and should not be used -// later. -static WebPEncodingError ApplyPalette(VP8LBitWriter* const bw, - VP8LEncoder* const enc, int quality) { - WebPEncodingError err = VP8_ENC_OK; - int i, x, y; - const WebPPicture* const pic = enc->pic_; - uint32_t* argb = pic->argb; - const int width = pic->width; - const int height = pic->height; - uint32_t* const palette = enc->palette_; - const int palette_size = enc->palette_size_; +// ----------------------------------------------------------------------------- - // Replace each input pixel by corresponding palette index. - for (y = 0; y < height; ++y) { - for (x = 0; x < width; ++x) { - const uint32_t pix = argb[x]; - for (i = 0; i < palette_size; ++i) { +static void MapToPalette(const uint32_t palette[], int num_colors, + uint32_t* const last_pix, int* const last_idx, + const uint32_t* src, uint8_t* dst, int width) { + int x; + int prev_idx = *last_idx; + uint32_t prev_pix = *last_pix; + for (x = 0; x < width; ++x) { + const uint32_t pix = src[x]; + if (pix != prev_pix) { + int i; + for (i = 0; i < num_colors; ++i) { if (pix == palette[i]) { - argb[x] = 0xff000000u | (i << 8); + prev_idx = i; + prev_pix = pix; break; } } } - argb += pic->argb_stride; + dst[x] = prev_idx; } + *last_idx = prev_idx; + *last_pix = prev_pix; +} - // Save palette to bitstream. - VP8LWriteBits(bw, 1, TRANSFORM_PRESENT); - VP8LWriteBits(bw, 2, COLOR_INDEXING_TRANSFORM); - assert(palette_size >= 1); - VP8LWriteBits(bw, 8, palette_size - 1); - for (i = palette_size - 1; i >= 1; --i) { - palette[i] = VP8LSubPixels(palette[i], palette[i - 1]); - } - if (!EncodeImageNoHuffman(bw, palette, palette_size, 1, quality)) { - err = VP8_ENC_ERROR_INVALID_CONFIGURATION; - goto Error; +// Remap argb values in src[] to packed palettes entries in dst[] +// using 'row' as a temporary buffer of size 'width'. +// We assume that all src[] values have a corresponding entry in the palette. +// Note: src[] can be the same as dst[] +static WebPEncodingError ApplyPalette(const uint32_t* src, uint32_t src_stride, + uint32_t* dst, uint32_t dst_stride, + const uint32_t* palette, int palette_size, + int width, int height, int xbits) { + // TODO(skal): this tmp buffer is not needed if VP8LBundleColorMap() can be + // made to work in-place. + uint8_t* const tmp_row = (uint8_t*)WebPSafeMalloc(width, sizeof(*tmp_row)); + int i, x, y; + int use_LUT = 1; + + if (tmp_row == NULL) return VP8_ENC_ERROR_OUT_OF_MEMORY; + for (i = 0; i < palette_size; ++i) { + if ((palette[i] & 0xffff00ffu) != 0) { + use_LUT = 0; + break; + } } - if (palette_size <= 16) { - // Image can be packed (multiple pixels per uint32_t). - int xbits = 1; - if (palette_size <= 2) { - xbits = 3; - } else if (palette_size <= 4) { - xbits = 2; + if (use_LUT) { + uint8_t inv_palette[MAX_PALETTE_SIZE] = { 0 }; + for (i = 0; i < palette_size; ++i) { + const int color = (palette[i] >> 8) & 0xff; + inv_palette[color] = i; + } + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + const int color = (src[x] >> 8) & 0xff; + tmp_row[x] = inv_palette[color]; + } + VP8LBundleColorMap(tmp_row, width, xbits, dst); + src += src_stride; + dst += dst_stride; + } + } else { + // Use 1 pixel cache for ARGB pixels. + uint32_t last_pix = palette[0]; + int last_idx = 0; + for (y = 0; y < height; ++y) { + MapToPalette(palette, palette_size, &last_pix, &last_idx, + src, tmp_row, width); + VP8LBundleColorMap(tmp_row, width, xbits, dst); + src += src_stride; + dst += dst_stride; } - err = AllocateTransformBuffer(enc, VP8LSubSampleSize(width, xbits), height); - if (err != VP8_ENC_OK) goto Error; - BundleColorMap(pic, xbits, enc->argb_, enc->current_width_); } + WebPSafeFree(tmp_row); + return VP8_ENC_OK; +} - Error: +// Note: Expects "enc->palette_" to be set properly. +static WebPEncodingError MapImageFromPalette(VP8LEncoder* const enc, + int in_place) { + WebPEncodingError err = VP8_ENC_OK; + const WebPPicture* const pic = enc->pic_; + const int width = pic->width; + const int height = pic->height; + const uint32_t* const palette = enc->palette_; + const uint32_t* src = in_place ? enc->argb_ : pic->argb; + const int src_stride = in_place ? enc->current_width_ : pic->argb_stride; + const int palette_size = enc->palette_size_; + int xbits; + + // Replace each input pixel by corresponding palette index. + // This is done line by line. + if (palette_size <= 4) { + xbits = (palette_size <= 2) ? 3 : 2; + } else { + xbits = (palette_size <= 16) ? 1 : 0; + } + + err = AllocateTransformBuffer(enc, VP8LSubSampleSize(width, xbits), height); + if (err != VP8_ENC_OK) return err; + + err = ApplyPalette(src, src_stride, + enc->argb_, enc->current_width_, + palette, palette_size, width, height, xbits); return err; } -// ----------------------------------------------------------------------------- +// Save palette_[] to bitstream. +static WebPEncodingError EncodePalette(VP8LBitWriter* const bw, + VP8LEncoder* const enc) { + int i; + uint32_t tmp_palette[MAX_PALETTE_SIZE]; + const int palette_size = enc->palette_size_; + const uint32_t* const palette = enc->palette_; + VP8LPutBits(bw, TRANSFORM_PRESENT, 1); + VP8LPutBits(bw, COLOR_INDEXING_TRANSFORM, 2); + assert(palette_size >= 1 && palette_size <= MAX_PALETTE_SIZE); + VP8LPutBits(bw, palette_size - 1, 8); + for (i = palette_size - 1; i >= 1; --i) { + tmp_palette[i] = VP8LSubPixels(palette[i], palette[i - 1]); + } + tmp_palette[0] = palette[0]; + return EncodeImageNoHuffman(bw, tmp_palette, &enc->hash_chain_, enc->refs_, + palette_size, 1, 20 /* quality */); +} -static int GetHistoBits(const WebPConfig* const config, - const WebPPicture* const pic) { +#ifdef WEBP_EXPERIMENTAL_FEATURES + +static WebPEncodingError EncodeDeltaPalettePredictorImage( + VP8LBitWriter* const bw, VP8LEncoder* const enc, int quality) { + const WebPPicture* const pic = enc->pic_; const int width = pic->width; const int height = pic->height; - const size_t hist_size = sizeof(VP8LHistogram); - // Make tile size a function of encoding method (Range: 0 to 6). - int histo_bits = 7 - config->method; - while (1) { - const size_t huff_image_size = VP8LSubSampleSize(width, histo_bits) * - VP8LSubSampleSize(height, histo_bits) * - hist_size; - if (huff_image_size <= MAX_HUFF_IMAGE_SIZE) break; - ++histo_bits; + + const int pred_bits = 5; + const int transform_width = VP8LSubSampleSize(width, pred_bits); + const int transform_height = VP8LSubSampleSize(height, pred_bits); + const int pred = 7; // default is Predictor7 (Top/Left Average) + const int tiles_per_row = VP8LSubSampleSize(width, pred_bits); + const int tiles_per_col = VP8LSubSampleSize(height, pred_bits); + uint32_t* predictors; + int tile_x, tile_y; + WebPEncodingError err = VP8_ENC_OK; + + predictors = (uint32_t*)WebPSafeMalloc(tiles_per_col * tiles_per_row, + sizeof(*predictors)); + if (predictors == NULL) return VP8_ENC_ERROR_OUT_OF_MEMORY; + + for (tile_y = 0; tile_y < tiles_per_col; ++tile_y) { + for (tile_x = 0; tile_x < tiles_per_row; ++tile_x) { + predictors[tile_y * tiles_per_row + tile_x] = 0xff000000u | (pred << 8); + } } - return (histo_bits < MIN_HUFFMAN_BITS) ? MIN_HUFFMAN_BITS : - (histo_bits > MAX_HUFFMAN_BITS) ? MAX_HUFFMAN_BITS : histo_bits; -} -static void InitEncParams(VP8LEncoder* const enc) { - const WebPConfig* const config = enc->config_; - const WebPPicture* const picture = enc->pic_; - const int method = config->method; - const float quality = config->quality; - enc->transform_bits_ = (method < 4) ? 5 : (method > 4) ? 3 : 4; - enc->histo_bits_ = GetHistoBits(config, picture); - enc->cache_bits_ = (quality <= 25.f) ? 0 : 7; + VP8LPutBits(bw, TRANSFORM_PRESENT, 1); + VP8LPutBits(bw, PREDICTOR_TRANSFORM, 2); + VP8LPutBits(bw, pred_bits - 2, 3); + err = EncodeImageNoHuffman(bw, predictors, &enc->hash_chain_, + (VP8LBackwardRefs*)enc->refs_, // cast const away + transform_width, transform_height, + quality); + WebPSafeFree(predictors); + return err; } +#endif // WEBP_EXPERIMENTAL_FEATURES + // ----------------------------------------------------------------------------- // VP8LEncoder static VP8LEncoder* VP8LEncoderNew(const WebPConfig* const config, const WebPPicture* const picture) { - VP8LEncoder* const enc = (VP8LEncoder*)calloc(1, sizeof(*enc)); + VP8LEncoder* const enc = (VP8LEncoder*)WebPSafeCalloc(1ULL, sizeof(*enc)); if (enc == NULL) { WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); return NULL; } enc->config_ = config; enc->pic_ = picture; + + VP8LEncDspInit(); + return enc; } static void VP8LEncoderDelete(VP8LEncoder* enc) { - free(enc->argb_); - free(enc); + if (enc != NULL) { + VP8LHashChainClear(&enc->hash_chain_); + VP8LBackwardRefsClear(&enc->refs_[0]); + VP8LBackwardRefsClear(&enc->refs_[1]); + ClearTransformBuffer(enc); + WebPSafeFree(enc); + } } // ----------------------------------------------------------------------------- @@ -950,89 +1379,102 @@ WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, VP8LBitWriter* const bw) { WebPEncodingError err = VP8_ENC_OK; const int quality = (int)config->quality; + const int low_effort = (config->method == 0); const int width = picture->width; const int height = picture->height; VP8LEncoder* const enc = VP8LEncoderNew(config, picture); const size_t byte_position = VP8LBitWriterNumBytes(bw); + int use_near_lossless = 0; + int hdr_size = 0; + int data_size = 0; + int use_delta_palettization = 0; if (enc == NULL) { err = VP8_ENC_ERROR_OUT_OF_MEMORY; goto Error; } - InitEncParams(enc); - // --------------------------------------------------------------------------- // Analyze image (entropy, num_palettes etc) - if (!VP8LEncAnalyze(enc, config->image_hint)) { + if (!AnalyzeAndInit(enc)) { err = VP8_ENC_ERROR_OUT_OF_MEMORY; goto Error; } - if (enc->use_palette_) { - err = ApplyPalette(bw, enc, quality); - if (err != VP8_ENC_OK) goto Error; - // Color cache is disabled for palette. - enc->cache_bits_ = 0; + // Apply near-lossless preprocessing. + use_near_lossless = !enc->use_palette_ && (config->near_lossless < 100); + if (use_near_lossless) { + if (!VP8ApplyNearLossless(width, height, picture->argb, + config->near_lossless)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } } - // In case image is not packed. - if (enc->argb_ == NULL) { - int y; - err = AllocateTransformBuffer(enc, width, height); +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (config->delta_palettization) { + enc->use_predict_ = 1; + enc->use_cross_color_ = 0; + enc->use_subtract_green_ = 0; + enc->use_palette_ = 1; + err = MakeInputImageCopy(enc); if (err != VP8_ENC_OK) goto Error; - for (y = 0; y < height; ++y) { - memcpy(enc->argb_ + y * width, - picture->argb + y * picture->argb_stride, - width * sizeof(*enc->argb_)); + err = WebPSearchOptimalDeltaPalette(enc); + if (err != VP8_ENC_OK) goto Error; + if (enc->use_palette_) { + err = AllocateTransformBuffer(enc, width, height); + if (err != VP8_ENC_OK) goto Error; + err = EncodeDeltaPalettePredictorImage(bw, enc, quality); + if (err != VP8_ENC_OK) goto Error; + use_delta_palettization = 1; } - enc->current_width_ = width; } +#endif // WEBP_EXPERIMENTAL_FEATURES - // --------------------------------------------------------------------------- - // Apply transforms and write transform data. - - if (!EvalAndApplySubtractGreen(enc, enc->current_width_, height, bw)) { - err = VP8_ENC_ERROR_OUT_OF_MEMORY; - goto Error; + // Encode palette + if (enc->use_palette_) { + err = EncodePalette(bw, enc); + if (err != VP8_ENC_OK) goto Error; + err = MapImageFromPalette(enc, use_delta_palettization); + if (err != VP8_ENC_OK) goto Error; } - - if (enc->use_predict_) { - if (!ApplyPredictFilter(enc, enc->current_width_, height, quality, bw)) { - err = VP8_ENC_ERROR_INVALID_CONFIGURATION; - goto Error; + if (!use_delta_palettization) { + // In case image is not packed. + if (enc->argb_ == NULL) { + err = MakeInputImageCopy(enc); + if (err != VP8_ENC_OK) goto Error; } - } - if (enc->use_cross_color_) { - if (!ApplyCrossColorFilter(enc, enc->current_width_, height, quality, bw)) { - err = VP8_ENC_ERROR_INVALID_CONFIGURATION; - goto Error; - } - } + // ------------------------------------------------------------------------- + // Apply transforms and write transform data. - VP8LWriteBits(bw, 1, !TRANSFORM_PRESENT); // No more transforms. + if (enc->use_subtract_green_) { + ApplySubtractGreen(enc, enc->current_width_, height, bw); + } - // --------------------------------------------------------------------------- - // Estimate the color cache size. + if (enc->use_predict_) { + err = ApplyPredictFilter(enc, enc->current_width_, height, quality, + low_effort, bw); + if (err != VP8_ENC_OK) goto Error; + } - if (enc->cache_bits_ > 0) { - if (!VP8LCalculateEstimateForCacheSize(enc->argb_, enc->current_width_, - height, &enc->cache_bits_)) { - err = VP8_ENC_ERROR_INVALID_CONFIGURATION; - goto Error; + if (enc->use_cross_color_) { + err = ApplyCrossColorFilter(enc, enc->current_width_, + height, quality, bw); + if (err != VP8_ENC_OK) goto Error; } } + VP8LPutBits(bw, !TRANSFORM_PRESENT, 1); // No more transforms. + // --------------------------------------------------------------------------- // Encode and write the transformed image. - - if (!EncodeImageInternal(bw, enc->argb_, enc->current_width_, height, - quality, enc->cache_bits_, enc->histo_bits_)) { - err = VP8_ENC_ERROR_OUT_OF_MEMORY; - goto Error; - } + err = EncodeImageInternal(bw, enc->argb_, &enc->hash_chain_, enc->refs_, + enc->current_width_, height, quality, low_effort, + &enc->cache_bits_, enc->histo_bits_, byte_position, + &hdr_size, &data_size); + if (err != VP8_ENC_OK) goto Error; if (picture->stats != NULL) { WebPAuxStats* const stats = picture->stats; @@ -1046,6 +1488,8 @@ WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, stats->cache_bits = enc->cache_bits_; stats->palette_size = enc->palette_size_; stats->lossless_size = (int)(VP8LBitWriterNumBytes(bw) - byte_position); + stats->lossless_hdr_size = hdr_size; + stats->lossless_data_size = data_size; } Error: @@ -1059,6 +1503,7 @@ int VP8LEncodeImage(const WebPConfig* const config, int has_alpha; size_t coded_size; int percent = 0; + int initial_size; WebPEncodingError err = VP8_ENC_OK; VP8LBitWriter bw; @@ -1072,7 +1517,11 @@ int VP8LEncodeImage(const WebPConfig* const config, width = picture->width; height = picture->height; - if (!VP8LBitWriterInit(&bw, (width * height) >> 1)) { + // Initialize BitWriter with size corresponding to 16 bpp to photo images and + // 8 bpp for graphical images. + initial_size = (config->image_hint == WEBP_HINT_GRAPH) ? + width * height : width * height * 2; + if (!VP8LBitWriterInit(&bw, initial_size)) { err = VP8_ENC_ERROR_OUT_OF_MEMORY; goto Error; } @@ -1135,7 +1584,7 @@ int VP8LEncodeImage(const WebPConfig* const config, Error: if (bw.error_) err = VP8_ENC_ERROR_OUT_OF_MEMORY; - VP8LBitWriterDestroy(&bw); + VP8LBitWriterWipeOut(&bw); if (err != VP8_ENC_OK) { WebPEncodingSetError(picture, err); return 0; @@ -1144,7 +1593,3 @@ int VP8LEncodeImage(const WebPConfig* const config, } //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/enc/vp8li.h b/drivers/webp/enc/vp8li.h index bb111aec33..6b6db127db 100644 --- a/drivers/webp/enc/vp8li.h +++ b/drivers/webp/enc/vp8li.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Lossless encoder: internal header. @@ -12,12 +14,13 @@ #ifndef WEBP_ENC_VP8LI_H_ #define WEBP_ENC_VP8LI_H_ +#include "./backward_references.h" #include "./histogram.h" #include "../utils/bit_writer.h" -#include "../encode.h" -#include "../format_constants.h" +#include "../webp/encode.h" +#include "../webp/format_constants.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -43,6 +46,12 @@ typedef struct { int use_palette_; int palette_size_; uint32_t palette_[MAX_PALETTE_SIZE]; + + // Some 'scratch' (potentially large) objects. + struct VP8LBackwardRefs refs_[2]; // Backward Refs array corresponding to + // LZ77 & RLE coding. + VP8LHashChain hash_chain_; // HashChain data for constructing + // backward references. } VP8LEncoder; //------------------------------------------------------------------------------ @@ -61,7 +70,7 @@ WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/enc/webpenc.c b/drivers/webp/enc/webpenc.c index 3c275589fc..8ced07a2a3 100644 --- a/drivers/webp/enc/webpenc.c +++ b/drivers/webp/enc/webpenc.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // WebP encoder: main entry point @@ -14,16 +16,13 @@ #include <string.h> #include <math.h> +#include "./cost.h" #include "./vp8enci.h" #include "./vp8li.h" #include "../utils/utils.h" // #define PRINT_MEMORY_INFO -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - #ifdef PRINT_MEMORY_INFO #include <stdio.h> #endif @@ -35,43 +34,18 @@ int WebPGetEncoderVersion(void) { } //------------------------------------------------------------------------------ -// WebPPicture -//------------------------------------------------------------------------------ - -static int DummyWriter(const uint8_t* data, size_t data_size, - const WebPPicture* const picture) { - // The following are to prevent 'unused variable' error message. - (void)data; - (void)data_size; - (void)picture; - return 1; -} - -int WebPPictureInitInternal(WebPPicture* picture, int version) { - if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) { - return 0; // caller/system version mismatch! - } - if (picture != NULL) { - memset(picture, 0, sizeof(*picture)); - picture->writer = DummyWriter; - WebPEncodingSetError(picture, VP8_ENC_OK); - } - return 1; -} - -//------------------------------------------------------------------------------ // VP8Encoder //------------------------------------------------------------------------------ static void ResetSegmentHeader(VP8Encoder* const enc) { - VP8SegmentHeader* const hdr = &enc->segment_hdr_; + VP8EncSegmentHeader* const hdr = &enc->segment_hdr_; hdr->num_segments_ = enc->config_->segments; hdr->update_map_ = (hdr->num_segments_ > 1); hdr->size_ = 0; } static void ResetFilterHeader(VP8Encoder* const enc) { - VP8FilterHeader* const hdr = &enc->filter_hdr_; + VP8EncFilterHeader* const hdr = &enc->filter_hdr_; hdr->simple_ = 1; hdr->level_ = 0; hdr->sharpness_ = 0; @@ -93,56 +67,73 @@ static void ResetBoundaryPredictions(VP8Encoder* const enc) { enc->nz_[-1] = 0; // constant } -// Map configured quality level to coding tools used. -//-------------+---+---+---+---+---+---+ -// Quality | 0 | 1 | 2 | 3 | 4 | 5 + -//-------------+---+---+---+---+---+---+ -// dynamic prob| ~ | x | x | x | x | x | -//-------------+---+---+---+---+---+---+ -// rd-opt modes| | | x | x | x | x | -//-------------+---+---+---+---+---+---+ -// fast i4/i16 | x | x | | | | | -//-------------+---+---+---+---+---+---+ -// rd-opt i4/16| | | x | x | x | x | -//-------------+---+---+---+---+---+---+ -// Trellis | | x | | | x | x | -//-------------+---+---+---+---+---+---+ -// full-SNS | | | | | | x | -//-------------+---+---+---+---+---+---+ +// Mapping from config->method_ to coding tools used. +//-------------------+---+---+---+---+---+---+---+ +// Method | 0 | 1 | 2 | 3 |(4)| 5 | 6 | +//-------------------+---+---+---+---+---+---+---+ +// fast probe | x | | | x | | | | +//-------------------+---+---+---+---+---+---+---+ +// dynamic proba | ~ | x | x | x | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// fast mode analysis| | | | | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// basic rd-opt | | | | x | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// disto-score i4/16 | | | x | | | | | +//-------------------+---+---+---+---+---+---+---+ +// rd-opt i4/16 | | | ~ | x | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// token buffer (opt)| | | | x | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// Trellis | | | | | | x |Ful| +//-------------------+---+---+---+---+---+---+---+ +// full-SNS | | | | | x | x | x | +//-------------------+---+---+---+---+---+---+---+ static void MapConfigToTools(VP8Encoder* const enc) { - const int method = enc->config_->method; - const int limit = 100 - enc->config_->partition_limit; + const WebPConfig* const config = enc->config_; + const int method = config->method; + const int limit = 100 - config->partition_limit; enc->method_ = method; - enc->rd_opt_level_ = (method >= 6) ? 3 - : (method >= 5) ? 2 - : (method >= 3) ? 1 - : 0; + enc->rd_opt_level_ = (method >= 6) ? RD_OPT_TRELLIS_ALL + : (method >= 5) ? RD_OPT_TRELLIS + : (method >= 3) ? RD_OPT_BASIC + : RD_OPT_NONE; enc->max_i4_header_bits_ = 256 * 16 * 16 * // upper bound: up to 16bit per 4x4 block (limit * limit) / (100 * 100); // ... modulated with a quadratic curve. + + enc->thread_level_ = config->thread_level; + + enc->do_search_ = (config->target_size > 0 || config->target_PSNR > 0); + if (!config->low_memory) { +#if !defined(DISABLE_TOKEN_BUFFER) + enc->use_tokens_ = (enc->rd_opt_level_ >= RD_OPT_BASIC); // need rd stats +#endif + if (enc->use_tokens_) { + enc->num_parts_ = 1; // doesn't work with multi-partition + } + } } // Memory scaling with dimensions: // memory (bytes) ~= 2.25 * w + 0.0625 * w * h // -// Typical memory footprint (768x510 picture) -// Memory used: -// encoder: 33919 -// block cache: 2880 -// info: 3072 -// preds: 24897 -// top samples: 1623 -// non-zero: 196 -// lf-stats: 2048 -// total: 68635 -// Transcient object sizes: -// VP8EncIterator: 352 -// VP8ModeScore: 912 -// VP8SegmentInfo: 532 -// VP8Proba: 31032 +// Typical memory footprint (614x440 picture) +// encoder: 22111 +// info: 4368 +// preds: 17741 +// top samples: 1263 +// non-zero: 175 +// lf-stats: 0 +// total: 45658 +// Transient object sizes: +// VP8EncIterator: 3360 +// VP8ModeScore: 872 +// VP8SegmentInfo: 732 +// VP8EncProba: 18352 // LFStats: 2048 -// Picture size (yuv): 589824 +// Picture size (yuv): 419328 static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, WebPPicture* const picture) { @@ -154,20 +145,16 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, const int preds_h = 4 * mb_h + 1; const size_t preds_size = preds_w * preds_h * sizeof(uint8_t); const int top_stride = mb_w * 16; - const size_t nz_size = (mb_w + 1) * sizeof(uint32_t); - const size_t cache_size = (3 * YUV_SIZE + PRED_SIZE) * sizeof(uint8_t); + const size_t nz_size = (mb_w + 1) * sizeof(uint32_t) + WEBP_ALIGN_CST; const size_t info_size = mb_w * mb_h * sizeof(VP8MBInfo); - const size_t samples_size = (2 * top_stride + // top-luma/u/v - 16 + 16 + 16 + 8 + 1 + // left y/u/v - 2 * ALIGN_CST) // align all - * sizeof(uint8_t); + const size_t samples_size = 2 * top_stride * sizeof(uint8_t) // top-luma/u/v + + WEBP_ALIGN_CST; // align all const size_t lf_stats_size = - config->autofilter ? sizeof(LFStats) + ALIGN_CST : 0; + config->autofilter ? sizeof(LFStats) + WEBP_ALIGN_CST : 0; VP8Encoder* enc; uint8_t* mem; const uint64_t size = (uint64_t)sizeof(VP8Encoder) // main struct - + ALIGN_CST // cache alignment - + cache_size // working caches + + WEBP_ALIGN_CST // cache alignment + info_size // modes info + preds_size // prediction modes + samples_size // top/left samples @@ -178,23 +165,22 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, printf("===================================\n"); printf("Memory used:\n" " encoder: %ld\n" - " block cache: %ld\n" " info: %ld\n" " preds: %ld\n" " top samples: %ld\n" " non-zero: %ld\n" " lf-stats: %ld\n" " total: %ld\n", - sizeof(VP8Encoder) + ALIGN_CST, cache_size, info_size, + sizeof(VP8Encoder) + WEBP_ALIGN_CST, info_size, preds_size, samples_size, nz_size, lf_stats_size, size); - printf("Transcient object sizes:\n" + printf("Transient object sizes:\n" " VP8EncIterator: %ld\n" " VP8ModeScore: %ld\n" " VP8SegmentInfo: %ld\n" - " VP8Proba: %ld\n" + " VP8EncProba: %ld\n" " LFStats: %ld\n", sizeof(VP8EncIterator), sizeof(VP8ModeScore), - sizeof(VP8SegmentInfo), sizeof(VP8Proba), + sizeof(VP8SegmentInfo), sizeof(VP8EncProba), sizeof(LFStats)); printf("Picture size (yuv): %ld\n", mb_w * mb_h * 384 * sizeof(uint8_t)); @@ -206,41 +192,27 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, return NULL; } enc = (VP8Encoder*)mem; - mem = (uint8_t*)DO_ALIGN(mem + sizeof(*enc)); + mem = (uint8_t*)WEBP_ALIGN(mem + sizeof(*enc)); memset(enc, 0, sizeof(*enc)); enc->num_parts_ = 1 << config->partitions; enc->mb_w_ = mb_w; enc->mb_h_ = mb_h; enc->preds_w_ = preds_w; - enc->yuv_in_ = (uint8_t*)mem; - mem += YUV_SIZE; - enc->yuv_out_ = (uint8_t*)mem; - mem += YUV_SIZE; - enc->yuv_out2_ = (uint8_t*)mem; - mem += YUV_SIZE; - enc->yuv_p_ = (uint8_t*)mem; - mem += PRED_SIZE; enc->mb_info_ = (VP8MBInfo*)mem; mem += info_size; enc->preds_ = ((uint8_t*)mem) + 1 + enc->preds_w_; mem += preds_w * preds_h * sizeof(uint8_t); - enc->nz_ = 1 + (uint32_t*)mem; + enc->nz_ = 1 + (uint32_t*)WEBP_ALIGN(mem); mem += nz_size; - enc->lf_stats_ = lf_stats_size ? (LFStats*)DO_ALIGN(mem) : NULL; + enc->lf_stats_ = lf_stats_size ? (LFStats*)WEBP_ALIGN(mem) : NULL; mem += lf_stats_size; // top samples (all 16-aligned) - mem = (uint8_t*)DO_ALIGN(mem); + mem = (uint8_t*)WEBP_ALIGN(mem); enc->y_top_ = (uint8_t*)mem; enc->uv_top_ = enc->y_top_ + top_stride; mem += 2 * top_stride; - mem = (uint8_t*)DO_ALIGN(mem + 1); - enc->y_left_ = (uint8_t*)mem; - mem += 16 + 16; - enc->u_left_ = (uint8_t*)mem; - mem += 16; - enc->v_left_ = (uint8_t*)mem; - mem += 8; + assert(mem <= (uint8_t*)enc + size); enc->config_ = config; enc->profile_ = use_filter ? ((config->filter_type == 1) ? 0 : 1) : 2; @@ -253,29 +225,32 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, ResetSegmentHeader(enc); ResetFilterHeader(enc); ResetBoundaryPredictions(enc); - + VP8EncDspCostInit(); VP8EncInitAlpha(enc); -#ifdef WEBP_EXPERIMENTAL_FEATURES - VP8EncInitLayer(enc); -#endif + // lower quality means smaller output -> we modulate a little the page + // size based on quality. This is just a crude 1rst-order prediction. + { + const float scale = 1.f + config->quality * 5.f / 100.f; // in [1,6] + VP8TBufferInit(&enc->tokens_, (int)(mb_w * mb_h * 4 * scale)); + } return enc; } -static void DeleteVP8Encoder(VP8Encoder* enc) { +static int DeleteVP8Encoder(VP8Encoder* enc) { + int ok = 1; if (enc != NULL) { - VP8EncDeleteAlpha(enc); -#ifdef WEBP_EXPERIMENTAL_FEATURES - VP8EncDeleteLayer(enc); -#endif - free(enc); + ok = VP8EncDeleteAlpha(enc); + VP8TBufferClear(&enc->tokens_); + WebPSafeFree(enc); } + return ok; } //------------------------------------------------------------------------------ static double GetPSNR(uint64_t err, uint64_t size) { - return err ? 10. * log10(255. * 255. * size / err) : 99.; + return (err > 0 && size > 0) ? 10. * log10(255. * 255. * size / err) : 99.; } static void FinalizePSNR(const VP8Encoder* const enc) { @@ -332,7 +307,7 @@ int WebPReportProgress(const WebPPicture* const pic, //------------------------------------------------------------------------------ int WebPEncode(const WebPConfig* config, WebPPicture* pic) { - int ok; + int ok = 0; if (pic == NULL) return 0; @@ -346,44 +321,63 @@ int WebPEncode(const WebPConfig* config, WebPPicture* pic) { if (pic->width > WEBP_MAX_DIMENSION || pic->height > WEBP_MAX_DIMENSION) return WebPEncodingSetError(pic, VP8_ENC_ERROR_BAD_DIMENSION); + if (!config->exact) { + WebPCleanupTransparentArea(pic); + } + if (pic->stats != NULL) memset(pic->stats, 0, sizeof(*pic->stats)); if (!config->lossless) { VP8Encoder* enc = NULL; - if (pic->y == NULL || pic->u == NULL || pic->v == NULL) { - if (pic->argb != NULL) { - if (!WebPPictureARGBToYUVA(pic, WEBP_YUV420)) return 0; + if (pic->use_argb || pic->y == NULL || pic->u == NULL || pic->v == NULL) { + // Make sure we have YUVA samples. + if (config->preprocessing & 4) { + if (!WebPPictureSmartARGBToYUVA(pic)) { + return 0; + } } else { - return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); + float dithering = 0.f; + if (config->preprocessing & 2) { + const float x = config->quality / 100.f; + const float x2 = x * x; + // slowly decreasing from max dithering at low quality (q->0) + // to 0.5 dithering amplitude at high quality (q->100) + dithering = 1.0f + (0.5f - 1.0f) * x2 * x2; + } + if (!WebPPictureARGBToYUVADithered(pic, WEBP_YUV420, dithering)) { + return 0; + } } } enc = InitVP8Encoder(config, pic); if (enc == NULL) return 0; // pic->error is already set. // Note: each of the tasks below account for 20% in the progress report. - ok = VP8EncAnalyze(enc) - && VP8StatLoop(enc) - && VP8EncLoop(enc) - && VP8EncFinishAlpha(enc) -#ifdef WEBP_EXPERIMENTAL_FEATURES - && VP8EncFinishLayer(enc) -#endif - && VP8EncWrite(enc); + ok = VP8EncAnalyze(enc); + + // Analysis is done, proceed to actual coding. + ok = ok && VP8EncStartAlpha(enc); // possibly done in parallel + if (!enc->use_tokens_) { + ok = ok && VP8EncLoop(enc); + } else { + ok = ok && VP8EncTokenLoop(enc); + } + ok = ok && VP8EncFinishAlpha(enc); + + ok = ok && VP8EncWrite(enc); StoreStats(enc); if (!ok) { VP8EncFreeBitWriters(enc); } - DeleteVP8Encoder(enc); + ok &= DeleteVP8Encoder(enc); // must always be called, even if !ok } else { - if (pic->argb == NULL) - return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); + // Make sure we have ARGB samples. + if (pic->argb == NULL && !WebPPictureYUVAToARGB(pic)) { + return 0; + } ok = VP8LEncodeImage(config, pic); // Sets pic->error in case of problem. } return ok; } - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/encode.h b/drivers/webp/encode.h index 2e37cfabe7..c382ea7608 100644 --- a/drivers/webp/encode.h +++ b/drivers/webp/encode.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // WebP encoder: main interface @@ -14,11 +16,22 @@ #include "./types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -#define WEBP_ENCODER_ABI_VERSION 0x0200 // MAJOR(8b) + MINOR(8b) +#define WEBP_ENCODER_ABI_VERSION 0x0209 // MAJOR(8b) + MINOR(8b) + +// Note: forward declaring enumerations is not allowed in (strict) C and C++, +// the types are left here for reference. +// typedef enum WebPImageHint WebPImageHint; +// typedef enum WebPEncCSP WebPEncCSP; +// typedef enum WebPPreset WebPPreset; +// typedef enum WebPEncodingError WebPEncodingError; +typedef struct WebPConfig WebPConfig; +typedef struct WebPPicture WebPPicture; // main structure for I/O +typedef struct WebPAuxStats WebPAuxStats; +typedef struct WebPMemoryWriter WebPMemoryWriter; // Return the encoder's version number, packed in hexadecimal using 8bits for // each of major/minor/revision. E.g: v2.5.7 is 0x020507. @@ -29,7 +42,7 @@ WEBP_EXTERN(int) WebPGetEncoderVersion(void); // Returns the size of the compressed data (pointed to by *output), or 0 if // an error occurred. The compressed data must be released by the caller -// using the call 'free(*output)'. +// using the call 'WebPFree(*output)'. // These functions compress using the lossy format, and the quality_factor // can go from 0 (smaller output, lower quality) to 100 (best quality, // larger output). @@ -62,11 +75,14 @@ WEBP_EXTERN(size_t) WebPEncodeLosslessBGRA(const uint8_t* bgra, int width, int height, int stride, uint8_t** output); +// Releases memory returned by the WebPEncode*() functions above. +WEBP_EXTERN(void) WebPFree(void* ptr); + //------------------------------------------------------------------------------ // Coding parameters // Image characteristics hint for the underlying encoder. -typedef enum { +typedef enum WebPImageHint { WEBP_HINT_DEFAULT = 0, // default preset. WEBP_HINT_PICTURE, // digital picture, like portrait, inner shot WEBP_HINT_PHOTO, // outdoor photograph, with natural lighting @@ -74,7 +90,8 @@ typedef enum { WEBP_HINT_LAST } WebPImageHint; -typedef struct { +// Compression parameters. +struct WebPConfig { int lossless; // Lossless encoding (0=lossy(default), 1=lossless). float quality; // between 0 (smallest file) and 100 (biggest) int method; // quality/speed trade-off (0=fast, 6=slower-better) @@ -103,19 +120,38 @@ typedef struct { int show_compressed; // if true, export the compressed picture back. // In-loop filtering is not applied. - int preprocessing; // preprocessing filter (0=none, 1=segment-smooth) + int preprocessing; // preprocessing filter: + // 0=none, 1=segment-smooth, 2=pseudo-random dithering int partitions; // log2(number of token partitions) in [0..3]. Default // is set to 0 for easier progressive decoding. int partition_limit; // quality degradation allowed to fit the 512k limit // on prediction modes coding (0: no degradation, // 100: maximum possible degradation). - - uint32_t pad[8]; // padding for later use -} WebPConfig; + int emulate_jpeg_size; // If true, compression parameters will be remapped + // to better match the expected output size from + // JPEG compression. Generally, the output size will + // be similar but the degradation will be lower. + int thread_level; // If non-zero, try and use multi-threaded encoding. + int low_memory; // If set, reduce memory usage (but increase CPU use). + + int near_lossless; // Near lossless encoding [0 = off(default) .. 100]. + // This feature is experimental. + int exact; // if non-zero, preserve the exact RGB values under + // transparent area. Otherwise, discard this invisible + // RGB information for better compression. The default + // value is 0. + +#ifdef WEBP_EXPERIMENTAL_FEATURES + int delta_palettization; + uint32_t pad[2]; // padding for later use +#else + uint32_t pad[3]; // padding for later use +#endif // WEBP_EXPERIMENTAL_FEATURES +}; // Enumerate some predefined settings for WebPConfig, depending on the type // of source picture. These presets are used when calling WebPConfigPreset(). -typedef enum { +typedef enum WebPPreset { WEBP_PRESET_DEFAULT = 0, // default preset. WEBP_PRESET_PICTURE, // digital picture, like portrait, inner shot WEBP_PRESET_PHOTO, // outdoor photograph, with natural lighting @@ -146,17 +182,23 @@ static WEBP_INLINE int WebPConfigPreset(WebPConfig* config, WEBP_ENCODER_ABI_VERSION); } +// Activate the lossless compression mode with the desired efficiency level +// between 0 (fastest, lowest compression) and 9 (slower, best compression). +// A good default level is '6', providing a fair tradeoff between compression +// speed and final compressed size. +// This function will overwrite several fields from config: 'method', 'quality' +// and 'lossless'. Returns false in case of parameter error. +WEBP_EXTERN(int) WebPConfigLosslessPreset(WebPConfig* config, int level); + // Returns true if 'config' is non-NULL and all configuration parameters are // within their valid ranges. WEBP_EXTERN(int) WebPValidateConfig(const WebPConfig* config); //------------------------------------------------------------------------------ // Input / Output - -typedef struct WebPPicture WebPPicture; // main structure for I/O - // Structure for storing auxiliary statistics (mostly for lossy encoding). -typedef struct { + +struct WebPAuxStats { int coded_size; // final size float PSNR[5]; // peak-signal-to-noise ratio for Y/U/V/All/Alpha @@ -180,9 +222,11 @@ typedef struct { int cache_bits; // number of bits for color cache lookup int palette_size; // number of color in palette, if used int lossless_size; // final lossless size + int lossless_hdr_size; // lossless header (transform, huffman etc) size + int lossless_data_size; // lossless image data size - uint32_t pad[4]; // padding for later use -} WebPAuxStats; + uint32_t pad[2]; // padding for later use +}; // Signature for output function. Should return true if writing was successful. // data/data_size is the segment of data to write, and 'picture' is for @@ -192,18 +236,22 @@ typedef int (*WebPWriterFunction)(const uint8_t* data, size_t data_size, // WebPMemoryWrite: a special WebPWriterFunction that writes to memory using // the following WebPMemoryWriter object (to be set as a custom_ptr). -typedef struct { +struct WebPMemoryWriter { uint8_t* mem; // final buffer (of size 'max_size', larger than 'size'). size_t size; // final size size_t max_size; // total capacity uint32_t pad[1]; // padding for later use -} WebPMemoryWriter; +}; // The following must be called first before any use. WEBP_EXTERN(void) WebPMemoryWriterInit(WebPMemoryWriter* writer); +// The following must be called to deallocate writer->mem memory. The 'writer' +// object itself is not deallocated. +WEBP_EXTERN(void) WebPMemoryWriterClear(WebPMemoryWriter* writer); // The custom writer to be used with WebPMemoryWriter as custom_ptr. Upon // completion, writer.mem and writer.size will hold the coded data. +// writer.mem must be freed by calling WebPMemoryWriterClear. WEBP_EXTERN(int) WebPMemoryWrite(const uint8_t* data, size_t data_size, const WebPPicture* picture); @@ -212,23 +260,17 @@ WEBP_EXTERN(int) WebPMemoryWrite(const uint8_t* data, size_t data_size, // everything is OK. typedef int (*WebPProgressHook)(int percent, const WebPPicture* picture); -typedef enum { +// Color spaces. +typedef enum WebPEncCSP { // chroma sampling - WEBP_YUV420 = 0, // 4:2:0 - WEBP_YUV422 = 1, // 4:2:2 - WEBP_YUV444 = 2, // 4:4:4 - WEBP_YUV400 = 3, // grayscale - WEBP_CSP_UV_MASK = 3, // bit-mask to get the UV sampling factors - // alpha channel variants - WEBP_YUV420A = 4, - WEBP_YUV422A = 5, - WEBP_YUV444A = 6, - WEBP_YUV400A = 7, // grayscale + alpha + WEBP_YUV420 = 0, // 4:2:0 + WEBP_YUV420A = 4, // alpha channel variant + WEBP_CSP_UV_MASK = 3, // bit-mask to get the UV sampling factors WEBP_CSP_ALPHA_BIT = 4 // bit that is set if alpha is present } WebPEncCSP; // Encoding error conditions. -typedef enum { +typedef enum WebPEncodingError { VP8_ENC_OK = 0, VP8_ENC_ERROR_OUT_OF_MEMORY, // memory error allocating objects VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY, // memory error while flushing bits @@ -248,7 +290,6 @@ typedef enum { // Main exchange structure (input samples, output bytes, statistics) struct WebPPicture { - // INPUT ////////////// // Main flag for encoder selecting between ARGB or YUV input. @@ -303,17 +344,15 @@ struct WebPPicture { uint32_t pad3[3]; // padding for later use - // Unused for now: original samples (for non-YUV420 modes) - uint8_t *u0, *v0; - int uv0_stride; - - uint32_t pad4[7]; // padding for later use + // Unused for now + uint8_t *pad4, *pad5; + uint32_t pad6[8]; // padding for later use // PRIVATE FIELDS //////////////////// void* memory_; // row chunk of memory for yuva planes void* memory_argb_; // and for argb too. - void* pad5[2]; // padding for later use + void* pad7[2]; // padding for later use }; // Internal, version-checked, entry point @@ -343,18 +382,19 @@ WEBP_EXTERN(int) WebPPictureAlloc(WebPPicture* picture); // preserved. WEBP_EXTERN(void) WebPPictureFree(WebPPicture* picture); -// Copy the pixels of *src into *dst, using WebPPictureAlloc. Upon return, -// *dst will fully own the copied pixels (this is not a view). +// Copy the pixels of *src into *dst, using WebPPictureAlloc. Upon return, *dst +// will fully own the copied pixels (this is not a view). The 'dst' picture need +// not be initialized as its content is overwritten. // Returns false in case of memory allocation error. WEBP_EXTERN(int) WebPPictureCopy(const WebPPicture* src, WebPPicture* dst); -// Compute PSNR or SSIM distortion between two pictures. -// Result is in dB, stores in result[] in the Y/U/V/Alpha/All order. -// Returns false in case of error (pic1 and pic2 don't have same dimension, ...) +// Compute PSNR, SSIM or LSIM distortion metric between two pictures. Results +// are in dB, stored in result[] in the Y/U/V/Alpha/All or B/G/R/A/All order. +// Returns false in case of error (src and ref don't have same dimension, ...) // Warning: this function is rather CPU-intensive. WEBP_EXTERN(int) WebPPictureDistortion( - const WebPPicture* pic1, const WebPPicture* pic2, - int metric_type, // 0 = PSNR, 1 = SSIM + const WebPPicture* src, const WebPPicture* ref, + int metric_type, // 0 = PSNR, 1 = SSIM, 2 = LSIM float result[5]); // self-crops a picture to the rectangle defined by top/left/width/height. @@ -375,7 +415,9 @@ WEBP_EXTERN(int) WebPPictureCrop(WebPPicture* picture, // the top and left coordinates will be snapped to even values. // Picture 'src' must out-live 'dst' picture. Self-extraction of view is allowed // ('src' equal to 'dst') as a mean of fast-cropping (but note that doing so, -// the original dimension will be lost). +// the original dimension will be lost). Picture 'dst' need not be initialized +// with WebPPictureInit() if it is different from 'src', since its content will +// be overwritten. // Returns false in case of memory allocation error or invalid parameters. WEBP_EXTERN(int) WebPPictureView(const WebPPicture* src, int left, int top, int width, int height, @@ -386,7 +428,9 @@ WEBP_EXTERN(int) WebPPictureView(const WebPPicture* src, WEBP_EXTERN(int) WebPPictureIsView(const WebPPicture* picture); // Rescale a picture to new dimension width x height. -// Now gamma correction is applied. +// If either 'width' or 'height' (but not both) is 0 the corresponding +// dimension will be calculated preserving the aspect ratio. +// No gamma correction is applied. // Returns false in case of error (invalid parameter or insufficient memory). WEBP_EXTERN(int) WebPPictureRescale(WebPPicture* pic, int width, int height); @@ -413,13 +457,28 @@ WEBP_EXTERN(int) WebPPictureImportBGRA( WEBP_EXTERN(int) WebPPictureImportBGRX( WebPPicture* picture, const uint8_t* bgrx, int bgrx_stride); -// Converts picture->argb data to the YUVA format specified by 'colorspace'. +// Converts picture->argb data to the YUV420A format. The 'colorspace' +// parameter is deprecated and should be equal to WEBP_YUV420. // Upon return, picture->use_argb is set to false. The presence of real // non-opaque transparent values is detected, and 'colorspace' will be // adjusted accordingly. Note that this method is lossy. // Returns false in case of error. WEBP_EXTERN(int) WebPPictureARGBToYUVA(WebPPicture* picture, - WebPEncCSP colorspace); + WebPEncCSP /*colorspace = WEBP_YUV420*/); + +// Same as WebPPictureARGBToYUVA(), but the conversion is done using +// pseudo-random dithering with a strength 'dithering' between +// 0.0 (no dithering) and 1.0 (maximum dithering). This is useful +// for photographic picture. +WEBP_EXTERN(int) WebPPictureARGBToYUVADithered( + WebPPicture* picture, WebPEncCSP colorspace, float dithering); + +// Performs 'smart' RGBA->YUVA420 downsampling and colorspace conversion. +// Downsampling is handled with extra care in case of color clipping. This +// method is roughly 2x slower than WebPPictureARGBToYUVA() but produces better +// YUV representation. +// Returns false in case of error. +WEBP_EXTERN(int) WebPPictureSmartARGBToYUVA(WebPPicture* picture); // Converts picture->yuv to picture->argb and sets picture->use_argb to true. // The input format must be YUV_420 or YUV_420A. @@ -429,9 +488,9 @@ WEBP_EXTERN(int) WebPPictureARGBToYUVA(WebPPicture* picture, // Returns false in case of error. WEBP_EXTERN(int) WebPPictureYUVAToARGB(WebPPicture* picture); -// Helper function: given a width x height plane of YUV(A) samples -// (with stride 'stride'), clean-up the YUV samples under fully transparent -// area, to help compressibility (no guarantee, though). +// Helper function: given a width x height plane of RGBA or YUV(A) samples +// clean-up the YUV or RGB samples under fully transparent area, to help +// compressibility (no guarantee, though). WEBP_EXTERN(void) WebPCleanupTransparentArea(WebPPicture* picture); // Scan the picture 'picture' for the presence of non fully opaque alpha values. @@ -439,6 +498,11 @@ WEBP_EXTERN(void) WebPCleanupTransparentArea(WebPPicture* picture); // alpha plane can be ignored altogether e.g.). WEBP_EXTERN(int) WebPPictureHasTransparency(const WebPPicture* picture); +// Remove the transparency information (if present) by blending the color with +// the background color 'background_rgb' (specified as 24bit RGB triplet). +// After this call, all alpha values are reset to 0xff. +WEBP_EXTERN(void) WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb); + //------------------------------------------------------------------------------ // Main call @@ -456,7 +520,7 @@ WEBP_EXTERN(int) WebPEncode(const WebPConfig* config, WebPPicture* picture); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/format_constants.h b/drivers/webp/format_constants.h index 7ce498f672..b6e78a643e 100644 --- a/drivers/webp/format_constants.h +++ b/drivers/webp/format_constants.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Internal header for constants related to WebP file format. @@ -12,6 +14,9 @@ #ifndef WEBP_WEBP_FORMAT_CONSTANTS_H_ #define WEBP_WEBP_FORMAT_CONSTANTS_H_ +// Create fourcc of the chunk from the chunk tag characters. +#define MKFOURCC(a, b, c, d) ((a) | (b) << 8 | (c) << 16 | (uint32_t)(d) << 24) + // VP8 related constants. #define VP8_SIGNATURE 0x9d012a // Signature in VP8 data. #define VP8_MAX_PARTITION0_SIZE (1 << 19) // max size of mode partition @@ -65,23 +70,16 @@ typedef enum { #define CHUNK_SIZE_BYTES 4 // Size needed to store chunk's size. #define CHUNK_HEADER_SIZE 8 // Size of a chunk header. #define RIFF_HEADER_SIZE 12 // Size of the RIFF header ("RIFFnnnnWEBP"). -#define FRAME_CHUNK_SIZE 15 // Size of a FRM chunk. -#define LOOP_CHUNK_SIZE 2 // Size of a LOOP chunk. -#define TILE_CHUNK_SIZE 6 // Size of a TILE chunk. +#define ANMF_CHUNK_SIZE 16 // Size of an ANMF chunk. +#define ANIM_CHUNK_SIZE 6 // Size of an ANIM chunk. +#define FRGM_CHUNK_SIZE 6 // Size of a FRGM chunk. #define VP8X_CHUNK_SIZE 10 // Size of a VP8X chunk. -#define TILING_FLAG_BIT 0x01 // Set if tiles are possibly used. -#define ANIMATION_FLAG_BIT 0x02 // Set if some animation is expected -#define ICC_FLAG_BIT 0x04 // Whether ICC is present or not. -#define METADATA_FLAG_BIT 0x08 // Set if some META chunk is possibly present. -#define ALPHA_FLAG_BIT 0x10 // Should be same as the ALPHA_FLAG in mux.h -#define ROTATION_FLAG_BITS 0xe0 // all 3 bits for rotation + symmetry - -#define MAX_CANVAS_SIZE (1 << 24) // 24-bit max for VP8X width/height. -#define MAX_IMAGE_AREA (1ULL << 32) // 32-bit max for width x height. -#define MAX_LOOP_COUNT (1 << 16) // maximum value for loop-count -#define MAX_DURATION (1 << 24) // maximum duration -#define MAX_POSITION_OFFSET (1 << 24) // maximum frame/tile x/y offset +#define MAX_CANVAS_SIZE (1 << 24) // 24-bit max for VP8X width/height. +#define MAX_IMAGE_AREA (1ULL << 32) // 32-bit max for width x height. +#define MAX_LOOP_COUNT (1 << 16) // maximum value for loop-count +#define MAX_DURATION (1 << 24) // maximum duration +#define MAX_POSITION_OFFSET (1 << 24) // maximum frame/fragment x/y offset // Maximum chunk payload is such that adding the header and padding won't // overflow a uint32_t. diff --git a/drivers/webp/mux.h b/drivers/webp/mux.h index 5139af80fa..1fddfb76d4 100644 --- a/drivers/webp/mux.h +++ b/drivers/webp/mux.h @@ -1,60 +1,76 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // -// RIFF container manipulation for WEBP images. +// RIFF container manipulation and encoding for WebP images. // // Authors: Urvang (urvang@google.com) // Vikas (vikasa@google.com) -// This API allows manipulation of WebP container images containing features -// like Color profile, XMP metadata, Animation and Tiling. -// -// Code Example#1: Creating a MUX with image data, color profile and XMP -// metadata. -// -// int copy_data = 0; -// WebPMux* mux = WebPMuxNew(); -// // ... (Prepare image data). -// WebPMuxSetImage(mux, &image, copy_data); -// // ... (Prepare ICCP color profile data). -// WebPMuxSetColorProfile(mux, &icc_profile, copy_data); -// // ... (Prepare XMP metadata). -// WebPMuxSetMetadata(mux, &xmp, copy_data); -// // Get data from mux in WebP RIFF format. -// WebPMuxAssemble(mux, &output_data); -// WebPMuxDelete(mux); -// // ... (Consume output_data; e.g. write output_data.bytes_ to file). -// WebPDataClear(&output_data); -// -// Code Example#2: Get image and color profile data from a WebP file. -// -// int copy_data = 0; -// // ... (Read data from file). -// WebPMux* mux = WebPMuxCreate(&data, copy_data); -// WebPMuxGetImage(mux, &image); -// // ... (Consume image; e.g. call WebPDecode() to decode the data). -// WebPMuxGetColorProfile(mux, &icc_profile); -// // ... (Consume icc_data). -// WebPMuxDelete(mux); -// free(data); - #ifndef WEBP_WEBP_MUX_H_ #define WEBP_WEBP_MUX_H_ -#include "./types.h" +#include "./mux_types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -#define WEBP_MUX_ABI_VERSION 0x0100 // MAJOR(8b) + MINOR(8b) +#define WEBP_MUX_ABI_VERSION 0x0106 // MAJOR(8b) + MINOR(8b) + +//------------------------------------------------------------------------------ +// Mux API +// +// This API allows manipulation of WebP container images containing features +// like color profile, metadata, animation and fragmented images. +// +// Code Example#1: Create a WebPMux object with image data, color profile and +// XMP metadata. +/* + int copy_data = 0; + WebPMux* mux = WebPMuxNew(); + // ... (Prepare image data). + WebPMuxSetImage(mux, &image, copy_data); + // ... (Prepare ICCP color profile data). + WebPMuxSetChunk(mux, "ICCP", &icc_profile, copy_data); + // ... (Prepare XMP metadata). + WebPMuxSetChunk(mux, "XMP ", &xmp, copy_data); + // Get data from mux in WebP RIFF format. + WebPMuxAssemble(mux, &output_data); + WebPMuxDelete(mux); + // ... (Consume output_data; e.g. write output_data.bytes to file). + WebPDataClear(&output_data); +*/ + +// Code Example#2: Get image and color profile data from a WebP file. +/* + int copy_data = 0; + // ... (Read data from file). + WebPMux* mux = WebPMuxCreate(&data, copy_data); + WebPMuxGetFrame(mux, 1, &image); + // ... (Consume image; e.g. call WebPDecode() to decode the data). + WebPMuxGetChunk(mux, "ICCP", &icc_profile); + // ... (Consume icc_data). + WebPMuxDelete(mux); + free(data); +*/ + +// Note: forward declaring enumerations is not allowed in (strict) C and C++, +// the types are left here for reference. +// typedef enum WebPMuxError WebPMuxError; +// typedef enum WebPChunkId WebPChunkId; +typedef struct WebPMux WebPMux; // main opaque object. +typedef struct WebPMuxFrameInfo WebPMuxFrameInfo; +typedef struct WebPMuxAnimParams WebPMuxAnimParams; +typedef struct WebPAnimEncoderOptions WebPAnimEncoderOptions; // Error codes -typedef enum { +typedef enum WebPMuxError { WEBP_MUX_OK = 1, WEBP_MUX_NOT_FOUND = 0, WEBP_MUX_INVALID_ARGUMENT = -1, @@ -63,51 +79,26 @@ typedef enum { WEBP_MUX_NOT_ENOUGH_DATA = -4 } WebPMuxError; -// Flag values for different features used in VP8X chunk. -typedef enum { - TILE_FLAG = 0x00000001, - ANIMATION_FLAG = 0x00000002, - ICCP_FLAG = 0x00000004, - META_FLAG = 0x00000008, - ALPHA_FLAG = 0x00000010 -} WebPFeatureFlags; - // IDs for different types of chunks. -typedef enum { +typedef enum WebPChunkId { WEBP_CHUNK_VP8X, // VP8X WEBP_CHUNK_ICCP, // ICCP - WEBP_CHUNK_LOOP, // LOOP - WEBP_CHUNK_FRAME, // FRM - WEBP_CHUNK_TILE, // TILE + WEBP_CHUNK_ANIM, // ANIM + WEBP_CHUNK_ANMF, // ANMF + WEBP_CHUNK_FRGM, // FRGM WEBP_CHUNK_ALPHA, // ALPH WEBP_CHUNK_IMAGE, // VP8/VP8L - WEBP_CHUNK_META, // META + WEBP_CHUNK_EXIF, // EXIF + WEBP_CHUNK_XMP, // XMP WEBP_CHUNK_UNKNOWN, // Other chunks. WEBP_CHUNK_NIL } WebPChunkId; -typedef struct WebPMux WebPMux; // main opaque object. - -// Data type used to describe 'raw' data, e.g., chunk data -// (ICC profile, metadata) and WebP compressed image data. -typedef struct { - const uint8_t* bytes_; - size_t size_; -} WebPData; - //------------------------------------------------------------------------------ -// Manipulation of a WebPData object. - -// Initializes the contents of the 'webp_data' object with default values. -WEBP_EXTERN(void) WebPDataInit(WebPData* webp_data); -// Clears the contents of the 'webp_data' object by calling free(). Does not -// deallocate the object itself. -WEBP_EXTERN(void) WebPDataClear(WebPData* webp_data); - -// Allocates necessary storage for 'dst' and copies the contents of 'src'. -// Returns true on success. -WEBP_EXTERN(int) WebPDataCopy(const WebPData* src, WebPData* dst); +// Returns the version number of the mux library, packed in hexadecimal using +// 8bits for each of major/minor/revision. E.g: v2.5.7 is 0x020507. +WEBP_EXTERN(int) WebPGetMuxVersion(void); //------------------------------------------------------------------------------ // Life of a Mux object @@ -118,6 +109,7 @@ WEBP_EXTERN(WebPMux*) WebPNewInternal(int); // Creates an empty mux object. // Returns: // A pointer to the newly created empty mux object. +// Or NULL in case of memory error. static WEBP_INLINE WebPMux* WebPMuxNew(void) { return WebPNewInternal(WEBP_MUX_ABI_VERSION); } @@ -136,8 +128,8 @@ WEBP_EXTERN(WebPMux*) WebPMuxCreateInternal(const WebPData*, int, int); // Creates a mux object from raw data given in WebP RIFF format. // Parameters: // bitstream - (in) the bitstream data in WebP RIFF format -// copy_data - (in) value 1 indicates given data WILL copied to the mux, and -// value 0 indicates data will NOT be copied. +// copy_data - (in) value 1 indicates given data WILL be copied to the mux +// object and value 0 indicates data will NOT be copied. // Returns: // A pointer to the mux object created from given data - on success. // NULL - In case of invalid data or memory error. @@ -147,295 +139,237 @@ static WEBP_INLINE WebPMux* WebPMuxCreate(const WebPData* bitstream, } //------------------------------------------------------------------------------ -// Single Image. - -// Sets the image in the mux object. Any existing images (including frame/tile) -// will be removed. -// Parameters: -// mux - (in/out) object in which the image is to be set -// bitstream - (in) can either be a raw VP8/VP8L bitstream or a single-image -// WebP file (non-animated and non-tiled) -// copy_data - (in) value 1 indicates given data WILL copied to the mux, and -// value 0 indicates data will NOT be copied. -// Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or bitstream is NULL. -// WEBP_MUX_MEMORY_ERROR - on memory allocation error. -// WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxSetImage(WebPMux* mux, - const WebPData* bitstream, - int copy_data); - -// Gets image data from the mux object. -// The content of 'bitstream' is allocated using malloc(), and NOT -// owned by the 'mux' object. It MUST be deallocated by the caller by calling -// WebPDataClear(). -// Parameters: -// mux - (in) object from which the image is to be fetched -// bitstream - (out) the image data -// Returns: -// WEBP_MUX_INVALID_ARGUMENT - if either mux or bitstream is NULL -// OR mux contains animation/tiling. -// WEBP_MUX_NOT_FOUND - if image is not present in mux object. -// WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxGetImage(const WebPMux* mux, - WebPData* bitstream); - -// Deletes the image in the mux object. -// Parameters: -// mux - (in/out) object from which the image is to be deleted -// Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL -// OR if mux contains animation/tiling. -// WEBP_MUX_NOT_FOUND - if image is not present in mux object. -// WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxDeleteImage(WebPMux* mux); +// Non-image chunks. -//------------------------------------------------------------------------------ -// XMP Metadata. +// Note: Only non-image related chunks should be managed through chunk APIs. +// (Image related chunks are: "ANMF", "FRGM", "VP8 ", "VP8L" and "ALPH"). +// To add, get and delete images, use WebPMuxSetImage(), WebPMuxPushFrame(), +// WebPMuxGetFrame() and WebPMuxDeleteFrame(). -// Sets the XMP metadata in the mux object. Any existing metadata chunk(s) will -// be removed. +// Adds a chunk with id 'fourcc' and data 'chunk_data' in the mux object. +// Any existing chunk(s) with the same id will be removed. // Parameters: -// mux - (in/out) object to which the XMP metadata is to be added -// metadata - (in) the XMP metadata data to be added -// copy_data - (in) value 1 indicates given data WILL copied to the mux, and -// value 0 indicates data will NOT be copied. +// mux - (in/out) object to which the chunk is to be added +// fourcc - (in) a character array containing the fourcc of the given chunk; +// e.g., "ICCP", "XMP ", "EXIF" etc. +// chunk_data - (in) the chunk data to be added +// copy_data - (in) value 1 indicates given data WILL be copied to the mux +// object and value 0 indicates data will NOT be copied. // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux or metadata is NULL. +// WEBP_MUX_INVALID_ARGUMENT - if mux, fourcc or chunk_data is NULL +// or if fourcc corresponds to an image chunk. // WEBP_MUX_MEMORY_ERROR - on memory allocation error. // WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxSetMetadata(WebPMux* mux, - const WebPData* metadata, - int copy_data); +WEBP_EXTERN(WebPMuxError) WebPMuxSetChunk( + WebPMux* mux, const char fourcc[4], const WebPData* chunk_data, + int copy_data); -// Gets a reference to the XMP metadata in the mux object. +// Gets a reference to the data of the chunk with id 'fourcc' in the mux object. // The caller should NOT free the returned data. // Parameters: -// mux - (in) object from which the XMP metadata is to be fetched -// metadata - (out) XMP metadata +// mux - (in) object from which the chunk data is to be fetched +// fourcc - (in) a character array containing the fourcc of the chunk; +// e.g., "ICCP", "XMP ", "EXIF" etc. +// chunk_data - (out) returned chunk data // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if either mux or metadata is NULL. -// WEBP_MUX_NOT_FOUND - if metadata is not present in mux object. +// WEBP_MUX_INVALID_ARGUMENT - if mux, fourcc or chunk_data is NULL +// or if fourcc corresponds to an image chunk. +// WEBP_MUX_NOT_FOUND - If mux does not contain a chunk with the given id. // WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxGetMetadata(const WebPMux* mux, - WebPData* metadata); +WEBP_EXTERN(WebPMuxError) WebPMuxGetChunk( + const WebPMux* mux, const char fourcc[4], WebPData* chunk_data); -// Deletes the XMP metadata in the mux object. +// Deletes the chunk with the given 'fourcc' from the mux object. // Parameters: -// mux - (in/out) object from which XMP metadata is to be deleted +// mux - (in/out) object from which the chunk is to be deleted +// fourcc - (in) a character array containing the fourcc of the chunk; +// e.g., "ICCP", "XMP ", "EXIF" etc. // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL -// WEBP_MUX_NOT_FOUND - If mux does not contain metadata. +// WEBP_MUX_INVALID_ARGUMENT - if mux or fourcc is NULL +// or if fourcc corresponds to an image chunk. +// WEBP_MUX_NOT_FOUND - If mux does not contain a chunk with the given fourcc. // WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxDeleteMetadata(WebPMux* mux); +WEBP_EXTERN(WebPMuxError) WebPMuxDeleteChunk( + WebPMux* mux, const char fourcc[4]); //------------------------------------------------------------------------------ -// ICC Color Profile. - -// Sets the color profile in the mux object. Any existing color profile chunk(s) -// will be removed. +// Images. + +// Encapsulates data about a single frame/fragment. +struct WebPMuxFrameInfo { + WebPData bitstream; // image data: can be a raw VP8/VP8L bitstream + // or a single-image WebP file. + int x_offset; // x-offset of the frame. + int y_offset; // y-offset of the frame. + int duration; // duration of the frame (in milliseconds). + + WebPChunkId id; // frame type: should be one of WEBP_CHUNK_ANMF, + // WEBP_CHUNK_FRGM or WEBP_CHUNK_IMAGE + WebPMuxAnimDispose dispose_method; // Disposal method for the frame. + WebPMuxAnimBlend blend_method; // Blend operation for the frame. + uint32_t pad[1]; // padding for later use +}; + +// Sets the (non-animated and non-fragmented) image in the mux object. +// Note: Any existing images (including frames/fragments) will be removed. // Parameters: -// mux - (in/out) object to which the color profile is to be added -// color_profile - (in) the color profile data to be added -// copy_data - (in) value 1 indicates given data WILL copied to the mux, and -// value 0 indicates data will NOT be copied. -// Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux or color_profile is NULL -// WEBP_MUX_MEMORY_ERROR - on memory allocation error -// WEBP_MUX_OK - on success -WEBP_EXTERN(WebPMuxError) WebPMuxSetColorProfile(WebPMux* mux, - const WebPData* color_profile, - int copy_data); - -// Gets a reference to the color profile in the mux object. -// The caller should NOT free the returned data. -// Parameters: -// mux - (in) object from which the color profile data is to be fetched -// color_profile - (out) color profile data +// mux - (in/out) object in which the image is to be set +// bitstream - (in) can be a raw VP8/VP8L bitstream or a single-image +// WebP file (non-animated and non-fragmented) +// copy_data - (in) value 1 indicates given data WILL be copied to the mux +// object and value 0 indicates data will NOT be copied. // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if either mux or color_profile is NULL. -// WEBP_MUX_NOT_FOUND - if color profile is not present in mux object. +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or bitstream is NULL. +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. // WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxGetColorProfile(const WebPMux* mux, - WebPData* color_profile); - -// Deletes the color profile in the mux object. +WEBP_EXTERN(WebPMuxError) WebPMuxSetImage( + WebPMux* mux, const WebPData* bitstream, int copy_data); + +// Adds a frame at the end of the mux object. +// Notes: (1) frame.id should be one of WEBP_CHUNK_ANMF or WEBP_CHUNK_FRGM +// (2) For setting a non-animated non-fragmented image, use +// WebPMuxSetImage() instead. +// (3) Type of frame being pushed must be same as the frames in mux. +// (4) As WebP only supports even offsets, any odd offset will be snapped +// to an even location using: offset &= ~1 // Parameters: -// mux - (in/out) object from which color profile is to be deleted +// mux - (in/out) object to which the frame is to be added +// frame - (in) frame data. +// copy_data - (in) value 1 indicates given data WILL be copied to the mux +// object and value 0 indicates data will NOT be copied. // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL -// WEBP_MUX_NOT_FOUND - If mux does not contain color profile. -// WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxDeleteColorProfile(WebPMux* mux); - -//------------------------------------------------------------------------------ -// Animation. - -// Adds an animation frame at the end of the mux object. -// Note: as WebP only supports even offsets, any odd offset will be snapped to -// an even location using: offset &= ~1 -// Parameters: -// mux - (in/out) object to which an animation frame is to be added -// bitstream - (in) the image data corresponding to the frame. It can either -// be a raw VP8/VP8L bitstream or a single-image WebP file -// (non-animated and non-tiled) -// x_offset - (in) x-offset of the frame to be added -// y_offset - (in) y-offset of the frame to be added -// duration - (in) duration of the frame to be added (in milliseconds) -// copy_data - (in) value 1 indicates given data WILL copied to the mux, and -// value 0 indicates data will NOT be copied. -// Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or bitstream is NULL +// WEBP_MUX_INVALID_ARGUMENT - if mux or frame is NULL +// or if content of 'frame' is invalid. // WEBP_MUX_MEMORY_ERROR - on memory allocation error. // WEBP_MUX_OK - on success. WEBP_EXTERN(WebPMuxError) WebPMuxPushFrame( - WebPMux* mux, const WebPData* bitstream, - int x_offset, int y_offset, int duration, int copy_data); - -// TODO(urvang): Create a struct as follows to reduce argument list size: -// typedef struct { -// WebPData bitstream; -// int x_offset, y_offset; -// int duration; -// } FrameInfo; - -// Gets the nth animation frame from the mux object. -// The content of 'bitstream' is allocated using malloc(), and NOT + WebPMux* mux, const WebPMuxFrameInfo* frame, int copy_data); + +// Gets the nth frame from the mux object. +// The content of 'frame->bitstream' is allocated using malloc(), and NOT // owned by the 'mux' object. It MUST be deallocated by the caller by calling // WebPDataClear(). // nth=0 has a special meaning - last position. // Parameters: // mux - (in) object from which the info is to be fetched // nth - (in) index of the frame in the mux object -// bitstream - (out) the image data -// x_offset - (out) x-offset of the returned frame -// y_offset - (out) y-offset of the returned frame -// duration - (out) duration of the returned frame (in milliseconds) +// frame - (out) data of the returned frame // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if either mux, bitstream, x_offset, -// y_offset, or duration is NULL +// WEBP_MUX_INVALID_ARGUMENT - if mux or frame is NULL. // WEBP_MUX_NOT_FOUND - if there are less than nth frames in the mux object. // WEBP_MUX_BAD_DATA - if nth frame chunk in mux is invalid. +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. // WEBP_MUX_OK - on success. WEBP_EXTERN(WebPMuxError) WebPMuxGetFrame( - const WebPMux* mux, uint32_t nth, WebPData* bitstream, - int* x_offset, int* y_offset, int* duration); + const WebPMux* mux, uint32_t nth, WebPMuxFrameInfo* frame); -// Deletes an animation frame from the mux object. +// Deletes a frame from the mux object. // nth=0 has a special meaning - last position. // Parameters: // mux - (in/out) object from which a frame is to be deleted // nth - (in) The position from which the frame is to be deleted // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL. // WEBP_MUX_NOT_FOUND - If there are less than nth frames in the mux object // before deletion. // WEBP_MUX_OK - on success. WEBP_EXTERN(WebPMuxError) WebPMuxDeleteFrame(WebPMux* mux, uint32_t nth); -// Sets the animation loop count in the mux object. Any existing loop count -// value(s) will be removed. +//------------------------------------------------------------------------------ +// Animation. + +// Animation parameters. +struct WebPMuxAnimParams { + uint32_t bgcolor; // Background color of the canvas stored (in MSB order) as: + // Bits 00 to 07: Alpha. + // Bits 08 to 15: Red. + // Bits 16 to 23: Green. + // Bits 24 to 31: Blue. + int loop_count; // Number of times to repeat the animation [0 = infinite]. +}; + +// Sets the animation parameters in the mux object. Any existing ANIM chunks +// will be removed. // Parameters: -// mux - (in/out) object in which loop chunk is to be set/added -// loop_count - (in) animation loop count value. -// Note that loop_count of zero denotes infinite loop. +// mux - (in/out) object in which ANIM chunk is to be set/added +// params - (in) animation parameters. // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL +// WEBP_MUX_INVALID_ARGUMENT - if mux or params is NULL. // WEBP_MUX_MEMORY_ERROR - on memory allocation error. // WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxSetLoopCount(WebPMux* mux, int loop_count); +WEBP_EXTERN(WebPMuxError) WebPMuxSetAnimationParams( + WebPMux* mux, const WebPMuxAnimParams* params); -// Gets the animation loop count from the mux object. +// Gets the animation parameters from the mux object. // Parameters: -// mux - (in) object from which the loop count is to be fetched -// loop_count - (out) the loop_count value present in the LOOP chunk +// mux - (in) object from which the animation parameters to be fetched +// params - (out) animation parameters extracted from the ANIM chunk // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if either of mux or loop_count is NULL -// WEBP_MUX_NOT_FOUND - if loop chunk is not present in mux object. +// WEBP_MUX_INVALID_ARGUMENT - if mux or params is NULL. +// WEBP_MUX_NOT_FOUND - if ANIM chunk is not present in mux object. // WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxGetLoopCount(const WebPMux* mux, - int* loop_count); +WEBP_EXTERN(WebPMuxError) WebPMuxGetAnimationParams( + const WebPMux* mux, WebPMuxAnimParams* params); //------------------------------------------------------------------------------ -// Tiling. - -// Adds a tile at the end of the mux object. -// Note: as WebP only supports even offsets, any odd offset will be snapped to -// an even location using: offset &= ~1 -// Parameters: -// mux - (in/out) object to which a tile is to be added. -// bitstream - (in) the image data corresponding to the frame. It can either -// be a raw VP8/VP8L bitstream or a single-image WebP file -// (non-animated and non-tiled) -// x_offset - (in) x-offset of the tile to be added -// y_offset - (in) y-offset of the tile to be added -// copy_data - (in) value 1 indicates given data WILL copied to the mux, and -// value 0 indicates data will NOT be copied. -// Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or bitstream is NULL -// WEBP_MUX_MEMORY_ERROR - on memory allocation error. -// WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxPushTile( - WebPMux* mux, const WebPData* bitstream, - int x_offset, int y_offset, int copy_data); +// Misc Utilities. -// Gets the nth tile from the mux object. -// The content of 'bitstream' is allocated using malloc(), and NOT -// owned by the 'mux' object. It MUST be deallocated by the caller by calling -// WebPDataClear(). -// nth=0 has a special meaning - last position. +// Sets the canvas size for the mux object. The width and height can be +// specified explicitly or left as zero (0, 0). +// * When width and height are specified explicitly, then this frame bound is +// enforced during subsequent calls to WebPMuxAssemble() and an error is +// reported if any animated frame does not completely fit within the canvas. +// * When unspecified (0, 0), the constructed canvas will get the frame bounds +// from the bounding-box over all frames after calling WebPMuxAssemble(). // Parameters: -// mux - (in) object from which the info is to be fetched -// nth - (in) index of the tile in the mux object -// bitstream - (out) the image data -// x_offset - (out) x-offset of the returned tile -// y_offset - (out) y-offset of the returned tile +// mux - (in) object to which the canvas size is to be set +// width - (in) canvas width +// height - (in) canvas height // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if either mux, bitstream, x_offset or -// y_offset is NULL -// WEBP_MUX_NOT_FOUND - if there are less than nth tiles in the mux object. -// WEBP_MUX_BAD_DATA - if nth tile chunk in mux is invalid. +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL; or +// width or height are invalid or out of bounds // WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxGetTile( - const WebPMux* mux, uint32_t nth, WebPData* bitstream, - int* x_offset, int* y_offset); +WEBP_EXTERN(WebPMuxError) WebPMuxSetCanvasSize(WebPMux* mux, + int width, int height); -// Deletes a tile from the mux object. -// nth=0 has a special meaning - last position +// Gets the canvas size from the mux object. +// Note: This method assumes that the VP8X chunk, if present, is up-to-date. +// That is, the mux object hasn't been modified since the last call to +// WebPMuxAssemble() or WebPMuxCreate(). // Parameters: -// mux - (in/out) object from which a tile is to be deleted -// nth - (in) The position from which the tile is to be deleted +// mux - (in) object from which the canvas size is to be fetched +// width - (out) canvas width +// height - (out) canvas height // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL -// WEBP_MUX_NOT_FOUND - If there are less than nth tiles in the mux object -// before deletion. +// WEBP_MUX_INVALID_ARGUMENT - if mux, width or height is NULL. +// WEBP_MUX_BAD_DATA - if VP8X/VP8/VP8L chunk or canvas size is invalid. // WEBP_MUX_OK - on success. -WEBP_EXTERN(WebPMuxError) WebPMuxDeleteTile(WebPMux* mux, uint32_t nth); - -//------------------------------------------------------------------------------ -// Misc Utilities. +WEBP_EXTERN(WebPMuxError) WebPMuxGetCanvasSize(const WebPMux* mux, + int* width, int* height); // Gets the feature flags from the mux object. +// Note: This method assumes that the VP8X chunk, if present, is up-to-date. +// That is, the mux object hasn't been modified since the last call to +// WebPMuxAssemble() or WebPMuxCreate(). // Parameters: // mux - (in) object from which the features are to be fetched // flags - (out) the flags specifying which features are present in the // mux object. This will be an OR of various flag values. // Enum 'WebPFeatureFlags' can be used to test individual flag values. // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if mux or flags is NULL -// WEBP_MUX_NOT_FOUND - if VP8X chunk is not present in mux object. -// WEBP_MUX_BAD_DATA - if VP8X chunk in mux is invalid. +// WEBP_MUX_INVALID_ARGUMENT - if mux or flags is NULL. +// WEBP_MUX_BAD_DATA - if VP8X/VP8/VP8L chunk or canvas size is invalid. // WEBP_MUX_OK - on success. WEBP_EXTERN(WebPMuxError) WebPMuxGetFeatures(const WebPMux* mux, uint32_t* flags); -// Gets number of chunks having tag value tag in the mux object. +// Gets number of chunks with the given 'id' in the mux object. // Parameters: // mux - (in) object from which the info is to be fetched // id - (in) chunk id specifying the type of chunk // num_elements - (out) number of chunks with the given chunk id // Returns: -// WEBP_MUX_INVALID_ARGUMENT - if either mux, or num_elements is NULL +// WEBP_MUX_INVALID_ARGUMENT - if mux, or num_elements is NULL. // WEBP_MUX_OK - on success. WEBP_EXTERN(WebPMuxError) WebPMuxNumChunks(const WebPMux* mux, WebPChunkId id, int* num_elements); @@ -445,159 +379,151 @@ WEBP_EXTERN(WebPMuxError) WebPMuxNumChunks(const WebPMux* mux, // Note: The content of 'assembled_data' will be ignored and overwritten. // Also, the content of 'assembled_data' is allocated using malloc(), and NOT // owned by the 'mux' object. It MUST be deallocated by the caller by calling -// WebPDataClear(). +// WebPDataClear(). It's always safe to call WebPDataClear() upon return, +// even in case of error. // Parameters: // mux - (in/out) object whose chunks are to be assembled // assembled_data - (out) assembled WebP data // Returns: // WEBP_MUX_BAD_DATA - if mux object is invalid. -// WEBP_MUX_INVALID_ARGUMENT - if either mux, output_data or output_size is -// NULL. +// WEBP_MUX_INVALID_ARGUMENT - if mux or assembled_data is NULL. // WEBP_MUX_MEMORY_ERROR - on memory allocation error. -// WEBP_MUX_OK - on success +// WEBP_MUX_OK - on success. WEBP_EXTERN(WebPMuxError) WebPMuxAssemble(WebPMux* mux, WebPData* assembled_data); //------------------------------------------------------------------------------ -// Demux API. -// Enables extraction of image and extended format data from WebP files. - -#define WEBP_DEMUX_ABI_VERSION 0x0100 // MAJOR(8b) + MINOR(8b) - -typedef struct WebPDemuxer WebPDemuxer; - -typedef enum { - WEBP_DEMUX_PARSING_HEADER, // Not enough data to parse full header. - WEBP_DEMUX_PARSED_HEADER, // Header parsing complete, data may be available. - WEBP_DEMUX_DONE // Entire file has been parsed. -} WebPDemuxState; - -//------------------------------------------------------------------------------ -// Life of a Demux object - -// Internal, version-checked, entry point -WEBP_EXTERN(WebPDemuxer*) WebPDemuxInternal( - const WebPData*, int, WebPDemuxState*, int); - -// Parses the WebP file given by 'data'. -// A complete WebP file must be present in 'data' for the function to succeed. -// Returns a WebPDemuxer object on successful parse, NULL otherwise. -static WEBP_INLINE WebPDemuxer* WebPDemux(const WebPData* data) { - return WebPDemuxInternal(data, 0, NULL, WEBP_DEMUX_ABI_VERSION); -} - -// Parses the WebP file given by 'data'. -// If 'state' is non-NULL it will be set to indicate the status of the demuxer. -// Returns a WebPDemuxer object on successful parse, NULL otherwise. -static WEBP_INLINE WebPDemuxer* WebPDemuxPartial( - const WebPData* data, WebPDemuxState* state) { - return WebPDemuxInternal(data, 1, state, WEBP_DEMUX_ABI_VERSION); +// WebPAnimEncoder API +// +// This API allows encoding (possibly) animated WebP images. +// +// Code Example: +/* + WebPAnimEncoderOptions enc_options; + WebPAnimEncoderOptionsInit(&enc_options); + // Tune 'enc_options' as needed. + WebPAnimEncoder* enc = WebPAnimEncoderNew(width, height, &enc_options); + while(<there are more frames>) { + WebPConfig config; + WebPConfigInit(&config); + // Tune 'config' as needed. + WebPAnimEncoderAdd(enc, frame, timestamp_ms, &config); + } + WebPAnimEncoderAdd(enc, NULL, timestamp_ms, NULL); + WebPAnimEncoderAssemble(enc, webp_data); + WebPAnimEncoderDelete(enc); + // Write the 'webp_data' to a file, or re-mux it further. +*/ + +typedef struct WebPAnimEncoder WebPAnimEncoder; // Main opaque object. + +// Forward declarations. Defined in encode.h. +struct WebPPicture; +struct WebPConfig; + +// Global options. +struct WebPAnimEncoderOptions { + WebPMuxAnimParams anim_params; // Animation parameters. + int minimize_size; // If true, minimize the output size (slow). Implicitly + // disables key-frame insertion. + int kmin; + int kmax; // Minimum and maximum distance between consecutive key + // frames in the output. The library may insert some key + // frames as needed to satisfy this criteria. + // Note that these conditions should hold: kmax > kmin + // and kmin >= kmax / 2 + 1. Also, if kmin == 0, then + // key-frame insertion is disabled; and if kmax == 0, + // then all frames will be key-frames. + int allow_mixed; // If true, use mixed compression mode; may choose + // either lossy and lossless for each frame. + int verbose; // If true, print info and warning messages to stderr. + + uint32_t padding[4]; // Padding for later use. +}; + +// Internal, version-checked, entry point. +WEBP_EXTERN(int) WebPAnimEncoderOptionsInitInternal( + WebPAnimEncoderOptions*, int); + +// Should always be called, to initialize a fresh WebPAnimEncoderOptions +// structure before modification. Returns false in case of version mismatch. +// WebPAnimEncoderOptionsInit() must have succeeded before using the +// 'enc_options' object. +static WEBP_INLINE int WebPAnimEncoderOptionsInit( + WebPAnimEncoderOptions* enc_options) { + return WebPAnimEncoderOptionsInitInternal(enc_options, WEBP_MUX_ABI_VERSION); } -// Frees memory associated with 'dmux'. -WEBP_EXTERN(void) WebPDemuxDelete(WebPDemuxer* dmux); - -//------------------------------------------------------------------------------ -// Data/information extraction. +// Internal, version-checked, entry point. +WEBP_EXTERN(WebPAnimEncoder*) WebPAnimEncoderNewInternal( + int, int, const WebPAnimEncoderOptions*, int); -typedef enum { - WEBP_FF_FORMAT_FLAGS, // Extended format flags present in the 'VP8X' chunk. - WEBP_FF_CANVAS_WIDTH, - WEBP_FF_CANVAS_HEIGHT, - WEBP_FF_LOOP_COUNT -} WebPFormatFeature; +// Creates and initializes a WebPAnimEncoder object. +// Parameters: +// width/height - (in) canvas width and height of the animation. +// enc_options - (in) encoding options; can be passed NULL to pick +// reasonable defaults. +// Returns: +// A pointer to the newly created WebPAnimEncoder object. +// Or NULL in case of memory error. +static WEBP_INLINE WebPAnimEncoder* WebPAnimEncoderNew( + int width, int height, const WebPAnimEncoderOptions* enc_options) { + return WebPAnimEncoderNewInternal(width, height, enc_options, + WEBP_MUX_ABI_VERSION); +} -// Get the 'feature' value from the 'dmux'. -// NOTE: values are only valid if WebPDemux() was used or WebPDemuxPartial() -// returned a state > WEBP_DEMUX_PARSING_HEADER. -WEBP_EXTERN(uint32_t) WebPDemuxGetI( - const WebPDemuxer* dmux, WebPFormatFeature feature); +// Optimize the given frame for WebP, encode it and add it to the +// WebPAnimEncoder object. +// The last call to 'WebPAnimEncoderAdd' should be with frame = NULL, which +// indicates that no more frames are to be added. This call is also used to +// determine the duration of the last frame. +// Parameters: +// enc - (in/out) object to which the frame is to be added. +// frame - (in/out) frame data in ARGB or YUV(A) format. If it is in YUV(A) +// format, it will be converted to ARGB, which incurs a small loss. +// timestamp_ms - (in) timestamp of this frame in milliseconds. +// Duration of a frame would be calculated as +// "timestamp of next frame - timestamp of this frame". +// Hence, timestamps should be in non-decreasing order. +// config - (in) encoding options; can be passed NULL to pick +// reasonable defaults. +// Returns: +// On error, returns false and frame->error_code is set appropriately. +// Otherwise, returns true. +WEBP_EXTERN(int) WebPAnimEncoderAdd( + WebPAnimEncoder* enc, struct WebPPicture* frame, int timestamp_ms, + const struct WebPConfig* config); + +// Assemble all frames added so far into a WebP bitstream. +// This call should be preceded by a call to 'WebPAnimEncoderAdd' with +// frame = NULL; if not, the duration of the last frame will be internally +// estimated. +// Parameters: +// enc - (in/out) object from which the frames are to be assembled. +// webp_data - (out) generated WebP bitstream. +// Returns: +// True on success. +WEBP_EXTERN(int) WebPAnimEncoderAssemble(WebPAnimEncoder* enc, + WebPData* webp_data); -//------------------------------------------------------------------------------ -// Frame iteration. - -typedef struct { - int frame_num_; - int num_frames_; - int tile_num_; - int num_tiles_; - int x_offset_, y_offset_; // offset relative to the canvas. - int width_, height_; // dimensions of this frame or tile. - int duration_; // display duration in milliseconds. - int complete_; // true if 'tile_' contains a full frame. partial images may - // still be decoded with the WebP incremental decoder. - WebPData tile_; // The frame or tile given by 'frame_num_' and 'tile_num_'. - - uint32_t pad[4]; // padding for later use - void* private_; -} WebPIterator; - -// Retrieves frame 'frame_number' from 'dmux'. -// 'iter->tile_' points to the first tile on return from this function. -// Individual tiles may be extracted using WebPDemuxSetTile(). -// Setting 'frame_number' equal to 0 will return the last frame of the image. -// Returns false if 'dmux' is NULL or frame 'frame_number' is not present. -// Call WebPDemuxReleaseIterator() when use of the iterator is complete. -// NOTE: 'dmux' must persist for the lifetime of 'iter'. -WEBP_EXTERN(int) WebPDemuxGetFrame( - const WebPDemuxer* dmux, int frame_number, WebPIterator* iter); - -// Sets 'iter->tile_' to point to the next ('iter->frame_num_' + 1) or previous -// ('iter->frame_num_' - 1) frame. These functions do not loop. -// Returns true on success, false otherwise. -WEBP_EXTERN(int) WebPDemuxNextFrame(WebPIterator* iter); -WEBP_EXTERN(int) WebPDemuxPrevFrame(WebPIterator* iter); - -// Sets 'iter->tile_' to reflect tile number 'tile_number'. -// Returns true if tile 'tile_number' is present, false otherwise. -WEBP_EXTERN(int) WebPDemuxSelectTile(WebPIterator* iter, int tile_number); - -// Releases any memory associated with 'iter'. -// Must be called before destroying the associated WebPDemuxer with -// WebPDemuxDelete(). -WEBP_EXTERN(void) WebPDemuxReleaseIterator(WebPIterator* iter); +// Get error string corresponding to the most recent call using 'enc'. The +// returned string is owned by 'enc' and is valid only until the next call to +// WebPAnimEncoderAdd() or WebPAnimEncoderAssemble() or WebPAnimEncoderDelete(). +// Parameters: +// enc - (in/out) object from which the error string is to be fetched. +// Returns: +// NULL if 'enc' is NULL. Otherwise, returns the error string if the last call +// to 'enc' had an error, or an empty string if the last call was a success. +WEBP_EXTERN(const char*) WebPAnimEncoderGetError(WebPAnimEncoder* enc); -//------------------------------------------------------------------------------ -// Chunk iteration. - -typedef struct { - // The current and total number of chunks with the fourcc given to - // WebPDemuxGetChunk(). - int chunk_num_; - int num_chunks_; - WebPData chunk_; // The payload of the chunk. - - uint32_t pad[6]; // padding for later use - void* private_; -} WebPChunkIterator; - -// Retrieves the 'chunk_number' instance of the chunk with id 'fourcc' from -// 'dmux'. -// 'fourcc' is a character array containing the fourcc of the chunk to return, -// e.g., "ICCP", "META", "EXIF", etc. -// Setting 'chunk_number' equal to 0 will return the last chunk in a set. -// Returns true if the chunk is found, false otherwise. Image related chunk -// payloads are accessed through WebPDemuxGetFrame() and related functions. -// Call WebPDemuxReleaseChunkIterator() when use of the iterator is complete. -// NOTE: 'dmux' must persist for the lifetime of the iterator. -WEBP_EXTERN(int) WebPDemuxGetChunk(const WebPDemuxer* dmux, - const char fourcc[4], int chunk_number, - WebPChunkIterator* iter); - -// Sets 'iter->chunk_' to point to the next ('iter->chunk_num_' + 1) or previous -// ('iter->chunk_num_' - 1) chunk. These functions do not loop. -// Returns true on success, false otherwise. -WEBP_EXTERN(int) WebPDemuxNextChunk(WebPChunkIterator* iter); -WEBP_EXTERN(int) WebPDemuxPrevChunk(WebPChunkIterator* iter); - -// Releases any memory associated with 'iter'. -// Must be called before destroying the associated WebPDemuxer with -// WebPDemuxDelete(). -WEBP_EXTERN(void) WebPDemuxReleaseChunkIterator(WebPChunkIterator* iter); +// Deletes the WebPAnimEncoder object. +// Parameters: +// enc - (in/out) object to be deleted +WEBP_EXTERN(void) WebPAnimEncoderDelete(WebPAnimEncoder* enc); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/mux/muxedit.c b/drivers/webp/mux/muxedit.c index 08629d4ae2..b27663f87a 100644 --- a/drivers/webp/mux/muxedit.c +++ b/drivers/webp/mux/muxedit.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Set and delete APIs for mux. @@ -12,50 +14,51 @@ #include <assert.h> #include "./muxi.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "../utils/utils.h" //------------------------------------------------------------------------------ // Life of a mux object. static void MuxInit(WebPMux* const mux) { - if (mux == NULL) return; + assert(mux != NULL); memset(mux, 0, sizeof(*mux)); + mux->canvas_width_ = 0; // just to be explicit + mux->canvas_height_ = 0; } WebPMux* WebPNewInternal(int version) { if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_MUX_ABI_VERSION)) { return NULL; } else { - WebPMux* const mux = (WebPMux*)malloc(sizeof(WebPMux)); - // If mux is NULL MuxInit is a noop. - MuxInit(mux); + WebPMux* const mux = (WebPMux*)WebPSafeMalloc(1ULL, sizeof(WebPMux)); + if (mux != NULL) MuxInit(mux); return mux; } } -static void DeleteAllChunks(WebPChunk** const chunk_list) { - while (*chunk_list) { - *chunk_list = ChunkDelete(*chunk_list); +// Delete all images in 'wpi_list'. +static void DeleteAllImages(WebPMuxImage** const wpi_list) { + while (*wpi_list != NULL) { + *wpi_list = MuxImageDelete(*wpi_list); } } static void MuxRelease(WebPMux* const mux) { - if (mux == NULL) return; - MuxImageDeleteAll(&mux->images_); - DeleteAllChunks(&mux->vp8x_); - DeleteAllChunks(&mux->iccp_); - DeleteAllChunks(&mux->loop_); - DeleteAllChunks(&mux->meta_); - DeleteAllChunks(&mux->unknown_); + assert(mux != NULL); + DeleteAllImages(&mux->images_); + ChunkListDelete(&mux->vp8x_); + ChunkListDelete(&mux->iccp_); + ChunkListDelete(&mux->anim_); + ChunkListDelete(&mux->exif_); + ChunkListDelete(&mux->xmp_); + ChunkListDelete(&mux->unknown_); } void WebPMuxDelete(WebPMux* mux) { - // If mux is NULL MuxRelease is a noop. - MuxRelease(mux); - free(mux); + if (mux != NULL) { + MuxRelease(mux); + WebPSafeFree(mux); + } } //------------------------------------------------------------------------------ @@ -64,81 +67,60 @@ void WebPMuxDelete(WebPMux* mux) { // Handy MACRO, makes MuxSet() very symmetric to MuxGet(). #define SWITCH_ID_LIST(INDEX, LIST) \ if (idx == (INDEX)) { \ - err = ChunkAssignData(&chunk, data, copy_data, kChunks[(INDEX)].tag); \ + err = ChunkAssignData(&chunk, data, copy_data, tag); \ if (err == WEBP_MUX_OK) { \ err = ChunkSetNth(&chunk, (LIST), nth); \ } \ return err; \ } -static WebPMuxError MuxSet(WebPMux* const mux, CHUNK_INDEX idx, uint32_t nth, +static WebPMuxError MuxSet(WebPMux* const mux, uint32_t tag, uint32_t nth, const WebPData* const data, int copy_data) { WebPChunk chunk; WebPMuxError err = WEBP_MUX_NOT_FOUND; + const CHUNK_INDEX idx = ChunkGetIndexFromTag(tag); assert(mux != NULL); assert(!IsWPI(kChunks[idx].id)); ChunkInit(&chunk); - SWITCH_ID_LIST(IDX_VP8X, &mux->vp8x_); - SWITCH_ID_LIST(IDX_ICCP, &mux->iccp_); - SWITCH_ID_LIST(IDX_LOOP, &mux->loop_); - SWITCH_ID_LIST(IDX_META, &mux->meta_); - if (idx == IDX_UNKNOWN && data->size_ > TAG_SIZE) { - // For raw-data unknown chunk, the first four bytes should be the tag to be - // used for the chunk. - const WebPData tmp = { data->bytes_ + TAG_SIZE, data->size_ - TAG_SIZE }; - err = ChunkAssignData(&chunk, &tmp, copy_data, GetLE32(data->bytes_ + 0)); - if (err == WEBP_MUX_OK) - err = ChunkSetNth(&chunk, &mux->unknown_, nth); - } + SWITCH_ID_LIST(IDX_VP8X, &mux->vp8x_); + SWITCH_ID_LIST(IDX_ICCP, &mux->iccp_); + SWITCH_ID_LIST(IDX_ANIM, &mux->anim_); + SWITCH_ID_LIST(IDX_EXIF, &mux->exif_); + SWITCH_ID_LIST(IDX_XMP, &mux->xmp_); + SWITCH_ID_LIST(IDX_UNKNOWN, &mux->unknown_); return err; } #undef SWITCH_ID_LIST -static WebPMuxError MuxAddChunk(WebPMux* const mux, uint32_t nth, uint32_t tag, - const uint8_t* data, size_t size, - int copy_data) { - const CHUNK_INDEX idx = ChunkGetIndexFromTag(tag); - const WebPData chunk_data = { data, size }; - assert(mux != NULL); - assert(size <= MAX_CHUNK_PAYLOAD); - assert(idx != IDX_NIL); - return MuxSet(mux, idx, nth, &chunk_data, copy_data); -} +// Create data for frame/fragment given image data, offsets and duration. +static WebPMuxError CreateFrameFragmentData( + int width, int height, const WebPMuxFrameInfo* const info, int is_frame, + WebPData* const frame_frgm) { + uint8_t* frame_frgm_bytes; + const size_t frame_frgm_size = kChunks[is_frame ? IDX_ANMF : IDX_FRGM].size; -// Create data for frame/tile given image data, offsets and duration. -static WebPMuxError CreateFrameTileData(const WebPData* const image, - int x_offset, int y_offset, - int duration, int is_lossless, - int is_frame, - WebPData* const frame_tile) { - int width; - int height; - uint8_t* frame_tile_bytes; - const size_t frame_tile_size = kChunks[is_frame ? IDX_FRAME : IDX_TILE].size; - - const int ok = is_lossless ? - VP8LGetInfo(image->bytes_, image->size_, &width, &height, NULL) : - VP8GetInfo(image->bytes_, image->size_, image->size_, &width, &height); - if (!ok) return WEBP_MUX_INVALID_ARGUMENT; - - assert(width > 0 && height > 0 && duration > 0); + assert(width > 0 && height > 0 && info->duration >= 0); + assert(info->dispose_method == (info->dispose_method & 1)); // Note: assertion on upper bounds is done in PutLE24(). - frame_tile_bytes = (uint8_t*)malloc(frame_tile_size); - if (frame_tile_bytes == NULL) return WEBP_MUX_MEMORY_ERROR; + frame_frgm_bytes = (uint8_t*)WebPSafeMalloc(1ULL, frame_frgm_size); + if (frame_frgm_bytes == NULL) return WEBP_MUX_MEMORY_ERROR; - PutLE24(frame_tile_bytes + 0, x_offset / 2); - PutLE24(frame_tile_bytes + 3, y_offset / 2); + PutLE24(frame_frgm_bytes + 0, info->x_offset / 2); + PutLE24(frame_frgm_bytes + 3, info->y_offset / 2); if (is_frame) { - PutLE24(frame_tile_bytes + 6, width - 1); - PutLE24(frame_tile_bytes + 9, height - 1); - PutLE24(frame_tile_bytes + 12, duration - 1); + PutLE24(frame_frgm_bytes + 6, width - 1); + PutLE24(frame_frgm_bytes + 9, height - 1); + PutLE24(frame_frgm_bytes + 12, info->duration); + frame_frgm_bytes[15] = + (info->blend_method == WEBP_MUX_NO_BLEND ? 2 : 0) | + (info->dispose_method == WEBP_MUX_DISPOSE_BACKGROUND ? 1 : 0); } - frame_tile->bytes_ = frame_tile_bytes; - frame_tile->size_ = frame_tile_size; + frame_frgm->bytes = frame_frgm_bytes; + frame_frgm->size = frame_frgm_size; return WEBP_MUX_OK; } @@ -149,8 +131,8 @@ static WebPMuxError GetImageData(const WebPData* const bitstream, WebPData* const image, WebPData* const alpha, int* const is_lossless) { WebPDataInit(alpha); // Default: no alpha. - if (bitstream->size_ < TAG_SIZE || - memcmp(bitstream->bytes_, "RIFF", TAG_SIZE)) { + if (bitstream->size < TAG_SIZE || + memcmp(bitstream->bytes, "RIFF", TAG_SIZE)) { // It is NOT webp file data. Return input data as is. *image = *bitstream; } else { @@ -166,7 +148,7 @@ static WebPMuxError GetImageData(const WebPData* const bitstream, } WebPMuxDelete(mux); } - *is_lossless = VP8LCheckSignature(image->bytes_, image->size_); + *is_lossless = VP8LCheckSignature(image->bytes, image->size); return WEBP_MUX_OK; } @@ -185,204 +167,166 @@ static WebPMuxError DeleteChunks(WebPChunk** chunk_list, uint32_t tag) { return err; } -static WebPMuxError MuxDeleteAllNamedData(WebPMux* const mux, CHUNK_INDEX idx) { - const WebPChunkId id = kChunks[idx].id; - WebPChunk** chunk_list; - - if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; +static WebPMuxError MuxDeleteAllNamedData(WebPMux* const mux, uint32_t tag) { + const WebPChunkId id = ChunkGetIdFromTag(tag); + assert(mux != NULL); if (IsWPI(id)) return WEBP_MUX_INVALID_ARGUMENT; - - chunk_list = MuxGetChunkListFromId(mux, id); - if (chunk_list == NULL) return WEBP_MUX_INVALID_ARGUMENT; - - return DeleteChunks(chunk_list, kChunks[idx].tag); -} - -static WebPMuxError DeleteLoopCount(WebPMux* const mux) { - return MuxDeleteAllNamedData(mux, IDX_LOOP); + return DeleteChunks(MuxGetChunkListFromId(mux, id), tag); } //------------------------------------------------------------------------------ // Set API(s). -WebPMuxError WebPMuxSetImage(WebPMux* mux, - const WebPData* bitstream, int copy_data) { +WebPMuxError WebPMuxSetChunk(WebPMux* mux, const char fourcc[4], + const WebPData* chunk_data, int copy_data) { + uint32_t tag; WebPMuxError err; - WebPChunk chunk; - WebPMuxImage wpi; - WebPData image; - WebPData alpha; - int is_lossless; - int image_tag; - - if (mux == NULL || bitstream == NULL || bitstream->bytes_ == NULL || - bitstream->size_ > MAX_CHUNK_PAYLOAD) { + if (mux == NULL || fourcc == NULL || chunk_data == NULL || + chunk_data->bytes == NULL || chunk_data->size > MAX_CHUNK_PAYLOAD) { return WEBP_MUX_INVALID_ARGUMENT; } + tag = ChunkGetTagFromFourCC(fourcc); - // If given data is for a whole webp file, - // extract only the VP8/VP8L data from it. - err = GetImageData(bitstream, &image, &alpha, &is_lossless); - if (err != WEBP_MUX_OK) return err; - image_tag = is_lossless ? kChunks[IDX_VP8L].tag : kChunks[IDX_VP8].tag; - - // Delete the existing images. - MuxImageDeleteAll(&mux->images_); - - MuxImageInit(&wpi); + // Delete existing chunk(s) with the same 'fourcc'. + err = MuxDeleteAllNamedData(mux, tag); + if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; - if (alpha.bytes_ != NULL) { // Add alpha chunk. - ChunkInit(&chunk); - err = ChunkAssignData(&chunk, &alpha, copy_data, kChunks[IDX_ALPHA].tag); - if (err != WEBP_MUX_OK) goto Err; - err = ChunkSetNth(&chunk, &wpi.alpha_, 1); - if (err != WEBP_MUX_OK) goto Err; - } + // Add the given chunk. + return MuxSet(mux, tag, 1, chunk_data, copy_data); +} - // Add image chunk. +// Creates a chunk from given 'data' and sets it as 1st chunk in 'chunk_list'. +static WebPMuxError AddDataToChunkList( + const WebPData* const data, int copy_data, uint32_t tag, + WebPChunk** chunk_list) { + WebPChunk chunk; + WebPMuxError err; ChunkInit(&chunk); - err = ChunkAssignData(&chunk, &image, copy_data, image_tag); + err = ChunkAssignData(&chunk, data, copy_data, tag); if (err != WEBP_MUX_OK) goto Err; - err = ChunkSetNth(&chunk, &wpi.img_, 1); - if (err != WEBP_MUX_OK) goto Err; - - // Add this image to mux. - err = MuxImagePush(&wpi, &mux->images_); + err = ChunkSetNth(&chunk, chunk_list, 1); if (err != WEBP_MUX_OK) goto Err; - - // All OK. return WEBP_MUX_OK; - Err: - // Something bad happened. ChunkRelease(&chunk); - MuxImageRelease(&wpi); return err; } -WebPMuxError WebPMuxSetMetadata(WebPMux* mux, const WebPData* metadata, - int copy_data) { - WebPMuxError err; - - if (mux == NULL || metadata == NULL || metadata->bytes_ == NULL || - metadata->size_ > MAX_CHUNK_PAYLOAD) { - return WEBP_MUX_INVALID_ARGUMENT; +// Extracts image & alpha data from the given bitstream and then sets wpi.alpha_ +// and wpi.img_ appropriately. +static WebPMuxError SetAlphaAndImageChunks( + const WebPData* const bitstream, int copy_data, WebPMuxImage* const wpi) { + int is_lossless = 0; + WebPData image, alpha; + WebPMuxError err = GetImageData(bitstream, &image, &alpha, &is_lossless); + const int image_tag = + is_lossless ? kChunks[IDX_VP8L].tag : kChunks[IDX_VP8].tag; + if (err != WEBP_MUX_OK) return err; + if (alpha.bytes != NULL) { + err = AddDataToChunkList(&alpha, copy_data, kChunks[IDX_ALPHA].tag, + &wpi->alpha_); + if (err != WEBP_MUX_OK) return err; } - - // Delete the existing metadata chunk(s). - err = WebPMuxDeleteMetadata(mux); - if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; - - // Add the given metadata chunk. - return MuxSet(mux, IDX_META, 1, metadata, copy_data); + err = AddDataToChunkList(&image, copy_data, image_tag, &wpi->img_); + if (err != WEBP_MUX_OK) return err; + return MuxImageFinalize(wpi) ? WEBP_MUX_OK : WEBP_MUX_INVALID_ARGUMENT; } -WebPMuxError WebPMuxSetColorProfile(WebPMux* mux, const WebPData* color_profile, - int copy_data) { +WebPMuxError WebPMuxSetImage(WebPMux* mux, const WebPData* bitstream, + int copy_data) { + WebPMuxImage wpi; WebPMuxError err; - if (mux == NULL || color_profile == NULL || color_profile->bytes_ == NULL || - color_profile->size_ > MAX_CHUNK_PAYLOAD) { + // Sanity checks. + if (mux == NULL || bitstream == NULL || bitstream->bytes == NULL || + bitstream->size > MAX_CHUNK_PAYLOAD) { return WEBP_MUX_INVALID_ARGUMENT; } - // Delete the existing ICCP chunk(s). - err = WebPMuxDeleteColorProfile(mux); - if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; - - // Add the given ICCP chunk. - return MuxSet(mux, IDX_ICCP, 1, color_profile, copy_data); -} - -WebPMuxError WebPMuxSetLoopCount(WebPMux* mux, int loop_count) { - WebPMuxError err; - uint8_t* data = NULL; + if (mux->images_ != NULL) { + // Only one 'simple image' can be added in mux. So, remove present images. + DeleteAllImages(&mux->images_); + } - if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; - if (loop_count >= MAX_LOOP_COUNT) return WEBP_MUX_INVALID_ARGUMENT; + MuxImageInit(&wpi); + err = SetAlphaAndImageChunks(bitstream, copy_data, &wpi); + if (err != WEBP_MUX_OK) goto Err; - // Delete the existing LOOP chunk(s). - err = DeleteLoopCount(mux); - if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; + // Add this WebPMuxImage to mux. + err = MuxImagePush(&wpi, &mux->images_); + if (err != WEBP_MUX_OK) goto Err; - // Add the given loop count. - data = (uint8_t*)malloc(kChunks[IDX_LOOP].size); - if (data == NULL) return WEBP_MUX_MEMORY_ERROR; + // All is well. + return WEBP_MUX_OK; - PutLE16(data, loop_count); - err = MuxAddChunk(mux, 1, kChunks[IDX_LOOP].tag, data, - kChunks[IDX_LOOP].size, 1); - free(data); + Err: // Something bad happened. + MuxImageRelease(&wpi); return err; } -static WebPMuxError MuxPushFrameTileInternal( - WebPMux* const mux, const WebPData* const bitstream, int x_offset, - int y_offset, int duration, int copy_data, uint32_t tag) { - WebPChunk chunk; - WebPData image; - WebPData alpha; +WebPMuxError WebPMuxPushFrame(WebPMux* mux, const WebPMuxFrameInfo* frame, + int copy_data) { WebPMuxImage wpi; WebPMuxError err; - WebPData frame_tile; - const int is_frame = (tag == kChunks[IDX_FRAME].tag) ? 1 : 0; - int is_lossless; - int image_tag; + int is_frame; + const WebPData* const bitstream = &frame->bitstream; // Sanity checks. - if (mux == NULL || bitstream == NULL || bitstream->bytes_ == NULL || - bitstream->size_ > MAX_CHUNK_PAYLOAD) { + if (mux == NULL || frame == NULL) return WEBP_MUX_INVALID_ARGUMENT; + + is_frame = (frame->id == WEBP_CHUNK_ANMF); + if (!(is_frame || (frame->id == WEBP_CHUNK_FRGM))) { return WEBP_MUX_INVALID_ARGUMENT; } - if (x_offset < 0 || x_offset >= MAX_POSITION_OFFSET || - y_offset < 0 || y_offset >= MAX_POSITION_OFFSET || - duration <= 0 || duration > MAX_DURATION) { + if (frame->id == WEBP_CHUNK_FRGM) { // Dead experiment. return WEBP_MUX_INVALID_ARGUMENT; } - // Snap offsets to even positions. - x_offset &= ~1; - y_offset &= ~1; + if (bitstream->bytes == NULL || bitstream->size > MAX_CHUNK_PAYLOAD) { + return WEBP_MUX_INVALID_ARGUMENT; + } - // If given data is for a whole webp file, - // extract only the VP8/VP8L data from it. - err = GetImageData(bitstream, &image, &alpha, &is_lossless); - if (err != WEBP_MUX_OK) return err; - image_tag = is_lossless ? kChunks[IDX_VP8L].tag : kChunks[IDX_VP8].tag; + if (mux->images_ != NULL) { + const WebPMuxImage* const image = mux->images_; + const uint32_t image_id = (image->header_ != NULL) ? + ChunkGetIdFromTag(image->header_->tag_) : WEBP_CHUNK_IMAGE; + if (image_id != frame->id) { + return WEBP_MUX_INVALID_ARGUMENT; // Conflicting frame types. + } + } - WebPDataInit(&frame_tile); - ChunkInit(&chunk); MuxImageInit(&wpi); - - if (alpha.bytes_ != NULL) { - // Add alpha chunk. - err = ChunkAssignData(&chunk, &alpha, copy_data, kChunks[IDX_ALPHA].tag); + err = SetAlphaAndImageChunks(bitstream, copy_data, &wpi); + if (err != WEBP_MUX_OK) goto Err; + assert(wpi.img_ != NULL); // As SetAlphaAndImageChunks() was successful. + + { + WebPData frame_frgm; + const uint32_t tag = kChunks[is_frame ? IDX_ANMF : IDX_FRGM].tag; + WebPMuxFrameInfo tmp = *frame; + tmp.x_offset &= ~1; // Snap offsets to even. + tmp.y_offset &= ~1; + if (!is_frame) { // Reset unused values. + tmp.duration = 1; + tmp.dispose_method = WEBP_MUX_DISPOSE_NONE; + tmp.blend_method = WEBP_MUX_BLEND; + } + if (tmp.x_offset < 0 || tmp.x_offset >= MAX_POSITION_OFFSET || + tmp.y_offset < 0 || tmp.y_offset >= MAX_POSITION_OFFSET || + (tmp.duration < 0 || tmp.duration >= MAX_DURATION) || + tmp.dispose_method != (tmp.dispose_method & 1)) { + err = WEBP_MUX_INVALID_ARGUMENT; + goto Err; + } + err = CreateFrameFragmentData(wpi.width_, wpi.height_, &tmp, is_frame, + &frame_frgm); if (err != WEBP_MUX_OK) goto Err; - err = ChunkSetNth(&chunk, &wpi.alpha_, 1); + // Add frame/fragment chunk (with copy_data = 1). + err = AddDataToChunkList(&frame_frgm, 1, tag, &wpi.header_); + WebPDataClear(&frame_frgm); // frame_frgm owned by wpi.header_ now. if (err != WEBP_MUX_OK) goto Err; - ChunkInit(&chunk); // chunk owned by wpi.alpha_ now. } - // Add image chunk. - err = ChunkAssignData(&chunk, &image, copy_data, image_tag); - if (err != WEBP_MUX_OK) goto Err; - err = ChunkSetNth(&chunk, &wpi.img_, 1); - if (err != WEBP_MUX_OK) goto Err; - ChunkInit(&chunk); // chunk owned by wpi.img_ now. - - // Create frame/tile data. - err = CreateFrameTileData(&image, x_offset, y_offset, duration, is_lossless, - is_frame, &frame_tile); - if (err != WEBP_MUX_OK) goto Err; - - // Add frame/tile chunk (with copy_data = 1). - err = ChunkAssignData(&chunk, &frame_tile, 1, tag); - if (err != WEBP_MUX_OK) goto Err; - WebPDataClear(&frame_tile); - err = ChunkSetNth(&chunk, &wpi.header_, 1); - if (err != WEBP_MUX_OK) goto Err; - ChunkInit(&chunk); // chunk owned by wpi.header_ now. - // Add this WebPMuxImage to mux. err = MuxImagePush(&wpi, &mux->images_); if (err != WEBP_MUX_OK) goto Err; @@ -391,128 +335,114 @@ static WebPMuxError MuxPushFrameTileInternal( return WEBP_MUX_OK; Err: // Something bad happened. - WebPDataClear(&frame_tile); - ChunkRelease(&chunk); MuxImageRelease(&wpi); return err; } -WebPMuxError WebPMuxPushFrame(WebPMux* mux, const WebPData* bitstream, - int x_offset, int y_offset, - int duration, int copy_data) { - return MuxPushFrameTileInternal(mux, bitstream, x_offset, y_offset, - duration, copy_data, kChunks[IDX_FRAME].tag); -} - -WebPMuxError WebPMuxPushTile(WebPMux* mux, const WebPData* bitstream, - int x_offset, int y_offset, - int copy_data) { - return MuxPushFrameTileInternal(mux, bitstream, x_offset, y_offset, - 1 /* unused duration */, copy_data, - kChunks[IDX_TILE].tag); -} - -//------------------------------------------------------------------------------ -// Delete API(s). - -WebPMuxError WebPMuxDeleteImage(WebPMux* mux) { +WebPMuxError WebPMuxSetAnimationParams(WebPMux* mux, + const WebPMuxAnimParams* params) { WebPMuxError err; + uint8_t data[ANIM_CHUNK_SIZE]; + const WebPData anim = { data, ANIM_CHUNK_SIZE }; - if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; + if (mux == NULL || params == NULL) return WEBP_MUX_INVALID_ARGUMENT; + if (params->loop_count < 0 || params->loop_count >= MAX_LOOP_COUNT) { + return WEBP_MUX_INVALID_ARGUMENT; + } - err = MuxValidateForImage(mux); - if (err != WEBP_MUX_OK) return err; + // Delete any existing ANIM chunk(s). + err = MuxDeleteAllNamedData(mux, kChunks[IDX_ANIM].tag); + if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; - // All well, delete image. - MuxImageDeleteAll(&mux->images_); - return WEBP_MUX_OK; + // Set the animation parameters. + PutLE32(data, params->bgcolor); + PutLE16(data + 4, params->loop_count); + return MuxSet(mux, kChunks[IDX_ANIM].tag, 1, &anim, 1); } -WebPMuxError WebPMuxDeleteMetadata(WebPMux* mux) { - return MuxDeleteAllNamedData(mux, IDX_META); -} +WebPMuxError WebPMuxSetCanvasSize(WebPMux* mux, + int width, int height) { + WebPMuxError err; + if (mux == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; + } + if (width < 0 || height < 0 || + width > MAX_CANVAS_SIZE || height > MAX_CANVAS_SIZE) { + return WEBP_MUX_INVALID_ARGUMENT; + } + if (width * (uint64_t)height >= MAX_IMAGE_AREA) { + return WEBP_MUX_INVALID_ARGUMENT; + } + if ((width * height) == 0 && (width | height) != 0) { + // one of width / height is zero, but not both -> invalid! + return WEBP_MUX_INVALID_ARGUMENT; + } + // If we already assembled a VP8X chunk, invalidate it. + err = MuxDeleteAllNamedData(mux, kChunks[IDX_VP8X].tag); + if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; -WebPMuxError WebPMuxDeleteColorProfile(WebPMux* mux) { - return MuxDeleteAllNamedData(mux, IDX_ICCP); + mux->canvas_width_ = width; + mux->canvas_height_ = height; + return WEBP_MUX_OK; } -static WebPMuxError DeleteFrameTileInternal(WebPMux* const mux, uint32_t nth, - CHUNK_INDEX idx) { - const WebPChunkId id = kChunks[idx].id; - if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; +//------------------------------------------------------------------------------ +// Delete API(s). - assert(idx == IDX_FRAME || idx == IDX_TILE); - return MuxImageDeleteNth(&mux->images_, nth, id); +WebPMuxError WebPMuxDeleteChunk(WebPMux* mux, const char fourcc[4]) { + if (mux == NULL || fourcc == NULL) return WEBP_MUX_INVALID_ARGUMENT; + return MuxDeleteAllNamedData(mux, ChunkGetTagFromFourCC(fourcc)); } WebPMuxError WebPMuxDeleteFrame(WebPMux* mux, uint32_t nth) { - return DeleteFrameTileInternal(mux, nth, IDX_FRAME); -} - -WebPMuxError WebPMuxDeleteTile(WebPMux* mux, uint32_t nth) { - return DeleteFrameTileInternal(mux, nth, IDX_TILE); + if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; + return MuxImageDeleteNth(&mux->images_, nth); } //------------------------------------------------------------------------------ // Assembly of the WebP RIFF file. -static WebPMuxError GetFrameTileInfo(const WebPChunk* const frame_tile_chunk, - int* const x_offset, int* const y_offset, - int* const duration) { - const uint32_t tag = frame_tile_chunk->tag_; - const int is_frame = (tag == kChunks[IDX_FRAME].tag); - const WebPData* const data = &frame_tile_chunk->data_; +static WebPMuxError GetFrameFragmentInfo( + const WebPChunk* const frame_frgm_chunk, + int* const x_offset, int* const y_offset, int* const duration) { + const uint32_t tag = frame_frgm_chunk->tag_; + const int is_frame = (tag == kChunks[IDX_ANMF].tag); + const WebPData* const data = &frame_frgm_chunk->data_; const size_t expected_data_size = - is_frame ? FRAME_CHUNK_SIZE : TILE_CHUNK_SIZE; - assert(frame_tile_chunk != NULL); - assert(tag == kChunks[IDX_FRAME].tag || tag == kChunks[IDX_TILE].tag); - if (data->size_ != expected_data_size) return WEBP_MUX_INVALID_ARGUMENT; - - *x_offset = 2 * GetLE24(data->bytes_ + 0); - *y_offset = 2 * GetLE24(data->bytes_ + 3); - if (is_frame) *duration = 1 + GetLE24(data->bytes_ + 12); + is_frame ? ANMF_CHUNK_SIZE : FRGM_CHUNK_SIZE; + assert(frame_frgm_chunk != NULL); + assert(tag == kChunks[IDX_ANMF].tag || tag == kChunks[IDX_FRGM].tag); + if (data->size != expected_data_size) return WEBP_MUX_INVALID_ARGUMENT; + + *x_offset = 2 * GetLE24(data->bytes + 0); + *y_offset = 2 * GetLE24(data->bytes + 3); + if (is_frame) *duration = GetLE24(data->bytes + 12); return WEBP_MUX_OK; } -WebPMuxError MuxGetImageWidthHeight(const WebPChunk* const image_chunk, - int* const width, int* const height) { - const uint32_t tag = image_chunk->tag_; - const WebPData* const data = &image_chunk->data_; - int w, h; - int ok; - assert(image_chunk != NULL); - assert(tag == kChunks[IDX_VP8].tag || tag == kChunks[IDX_VP8L].tag); - ok = (tag == kChunks[IDX_VP8].tag) ? - VP8GetInfo(data->bytes_, data->size_, data->size_, &w, &h) : - VP8LGetInfo(data->bytes_, data->size_, &w, &h, NULL); - if (ok) { - *width = w; - *height = h; - return WEBP_MUX_OK; - } else { - return WEBP_MUX_BAD_DATA; - } -} - static WebPMuxError GetImageInfo(const WebPMuxImage* const wpi, int* const x_offset, int* const y_offset, int* const duration, int* const width, int* const height) { - const WebPChunk* const image_chunk = wpi->img_; - const WebPChunk* const frame_tile_chunk = wpi->header_; + const WebPChunk* const frame_frgm_chunk = wpi->header_; + WebPMuxError err; + assert(wpi != NULL); + assert(frame_frgm_chunk != NULL); - // Get offsets and duration from FRM/TILE chunk. - const WebPMuxError err = - GetFrameTileInfo(frame_tile_chunk, x_offset, y_offset, duration); + // Get offsets and duration from ANMF/FRGM chunk. + err = GetFrameFragmentInfo(frame_frgm_chunk, x_offset, y_offset, duration); if (err != WEBP_MUX_OK) return err; // Get width and height from VP8/VP8L chunk. - return MuxGetImageWidthHeight(image_chunk, width, height); + if (width != NULL) *width = wpi->width_; + if (height != NULL) *height = wpi->height_; + return WEBP_MUX_OK; } -static WebPMuxError GetImageCanvasWidthHeight( - const WebPMux* const mux, uint32_t flags, - int* const width, int* const height) { +// Returns the tightest dimension for the canvas considering the image list. +static WebPMuxError GetAdjustedCanvasSize(const WebPMux* const mux, + uint32_t flags, + int* const width, int* const height) { WebPMuxImage* wpi = NULL; assert(mux != NULL); assert(width != NULL && height != NULL); @@ -521,13 +451,15 @@ static WebPMuxError GetImageCanvasWidthHeight( assert(wpi != NULL); assert(wpi->img_ != NULL); - if (wpi->next_) { + if (wpi->next_ != NULL) { int max_x = 0; int max_y = 0; int64_t image_area = 0; - // Aggregate the bounding box for animation frames & tiled images. + // if we have a chain of wpi's, header_ is necessarily set + assert(wpi->header_ != NULL); + // Aggregate the bounding box for animation frames & fragmented images. for (; wpi != NULL; wpi = wpi->next_) { - int x_offset, y_offset, duration, w, h; + int x_offset = 0, y_offset = 0, duration = 0, w = 0, h = 0; const WebPMuxError err = GetImageInfo(wpi, &x_offset, &y_offset, &duration, &w, &h); const int max_x_pos = x_offset + w; @@ -542,23 +474,19 @@ static WebPMuxError GetImageCanvasWidthHeight( } *width = max_x; *height = max_y; - // Crude check to validate that there are no image overlaps/holes for tile - // images. Check that the aggregated image area for individual tiles exactly - // matches the image area of the constructed canvas. However, the area-match - // is necessary but not sufficient condition. - if ((flags & TILE_FLAG) && (image_area != (max_x * max_y))) { + // Crude check to validate that there are no image overlaps/holes for + // fragmented images. Check that the aggregated image area for individual + // fragments exactly matches the image area of the constructed canvas. + // However, the area-match is necessary but not sufficient condition. + if ((flags & FRAGMENTS_FLAG) && (image_area != (max_x * max_y))) { *width = 0; *height = 0; return WEBP_MUX_INVALID_ARGUMENT; } } else { - // For a single image, extract the width & height from VP8/VP8L image-data. - int w, h; - const WebPChunk* const image_chunk = wpi->img_; - const WebPMuxError err = MuxGetImageWidthHeight(image_chunk, &w, &h); - if (err != WEBP_MUX_OK) return err; - *width = w; - *height = h; + // For a single image, canvas dimensions are same as image dimensions. + *width = wpi->width_; + *height = wpi->height_; } return WEBP_MUX_OK; } @@ -574,50 +502,45 @@ static WebPMuxError CreateVP8XChunk(WebPMux* const mux) { int width = 0; int height = 0; uint8_t data[VP8X_CHUNK_SIZE]; - const size_t data_size = VP8X_CHUNK_SIZE; + const WebPData vp8x = { data, VP8X_CHUNK_SIZE }; const WebPMuxImage* images = NULL; assert(mux != NULL); images = mux->images_; // First image. if (images == NULL || images->img_ == NULL || - images->img_->data_.bytes_ == NULL) { + images->img_->data_.bytes == NULL) { return WEBP_MUX_INVALID_ARGUMENT; } // If VP8X chunk(s) is(are) already present, remove them (and later add new // VP8X chunk with updated flags). - err = MuxDeleteAllNamedData(mux, IDX_VP8X); + err = MuxDeleteAllNamedData(mux, kChunks[IDX_VP8X].tag); if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; // Set flags. - if (mux->iccp_ != NULL && mux->iccp_->data_.bytes_ != NULL) { + if (mux->iccp_ != NULL && mux->iccp_->data_.bytes != NULL) { flags |= ICCP_FLAG; } - - if (mux->meta_ != NULL && mux->meta_->data_.bytes_ != NULL) { - flags |= META_FLAG; + if (mux->exif_ != NULL && mux->exif_->data_.bytes != NULL) { + flags |= EXIF_FLAG; + } + if (mux->xmp_ != NULL && mux->xmp_->data_.bytes != NULL) { + flags |= XMP_FLAG; } - if (images->header_ != NULL) { - if (images->header_->tag_ == kChunks[IDX_TILE].tag) { - // This is a tiled image. - flags |= TILE_FLAG; - } else if (images->header_->tag_ == kChunks[IDX_FRAME].tag) { + if (images->header_->tag_ == kChunks[IDX_FRGM].tag) { + // This is a fragmented image. + flags |= FRAGMENTS_FLAG; + } else if (images->header_->tag_ == kChunks[IDX_ANMF].tag) { // This is an image with animation. flags |= ANIMATION_FLAG; } } - if (MuxImageCount(images, WEBP_CHUNK_ALPHA) > 0) { flags |= ALPHA_FLAG; // Some images have an alpha channel. } - if (flags == 0) { - // For Simple Image, VP8X chunk should not be added. - return WEBP_MUX_OK; - } - - err = GetImageCanvasWidthHeight(mux, flags, &width, &height); + err = GetAdjustedCanvasSize(mux, flags, &width, &height); if (err != WEBP_MUX_OK) return err; if (width <= 0 || height <= 0) { @@ -627,9 +550,21 @@ static WebPMuxError CreateVP8XChunk(WebPMux* const mux) { return WEBP_MUX_INVALID_ARGUMENT; } - if (MuxHasLosslessImages(images)) { - // We have a file with a VP8X chunk having some lossless images. - // As lossless images implicitly contain alpha, force ALPHA_FLAG to be true. + if (mux->canvas_width_ != 0 || mux->canvas_height_ != 0) { + if (width > mux->canvas_width_ || height > mux->canvas_height_) { + return WEBP_MUX_INVALID_ARGUMENT; + } + width = mux->canvas_width_; + height = mux->canvas_height_; + } + + if (flags == 0) { + // For Simple Image, VP8X chunk should not be added. + return WEBP_MUX_OK; + } + + if (MuxHasAlpha(images)) { + // This means some frames explicitly/implicitly contain alpha. // Note: This 'flags' update must NOT be done for a lossless image // without a VP8X chunk! flags |= ALPHA_FLAG; @@ -639,74 +574,123 @@ static WebPMuxError CreateVP8XChunk(WebPMux* const mux) { PutLE24(data + 4, width - 1); // canvas width. PutLE24(data + 7, height - 1); // canvas height. - err = MuxAddChunk(mux, 1, kChunks[IDX_VP8X].tag, data, data_size, 1); - return err; + return MuxSet(mux, kChunks[IDX_VP8X].tag, 1, &vp8x, 1); +} + +// Cleans up 'mux' by removing any unnecessary chunks. +static WebPMuxError MuxCleanup(WebPMux* const mux) { + int num_frames; + int num_fragments; + int num_anim_chunks; + + // If we have an image with a single fragment or frame, and its rectangle + // covers the whole canvas, convert it to a non-animated non-fragmented image + // (to avoid writing FRGM/ANMF chunk unnecessarily). + WebPMuxError err = WebPMuxNumChunks(mux, kChunks[IDX_ANMF].id, &num_frames); + if (err != WEBP_MUX_OK) return err; + err = WebPMuxNumChunks(mux, kChunks[IDX_FRGM].id, &num_fragments); + if (err != WEBP_MUX_OK) return err; + if (num_frames == 1 || num_fragments == 1) { + WebPMuxImage* frame_frag; + err = MuxImageGetNth((const WebPMuxImage**)&mux->images_, 1, &frame_frag); + assert(err == WEBP_MUX_OK); // We know that one frame/fragment does exist. + assert(frame_frag != NULL); + if (frame_frag->header_ != NULL && + ((mux->canvas_width_ == 0 && mux->canvas_height_ == 0) || + (frame_frag->width_ == mux->canvas_width_ && + frame_frag->height_ == mux->canvas_height_))) { + assert(frame_frag->header_->tag_ == kChunks[IDX_ANMF].tag || + frame_frag->header_->tag_ == kChunks[IDX_FRGM].tag); + ChunkDelete(frame_frag->header_); // Removes ANMF/FRGM chunk. + frame_frag->header_ = NULL; + num_frames = 0; + num_fragments = 0; + } + } + // Remove ANIM chunk if this is a non-animated image. + err = WebPMuxNumChunks(mux, kChunks[IDX_ANIM].id, &num_anim_chunks); + if (err != WEBP_MUX_OK) return err; + if (num_anim_chunks >= 1 && num_frames == 0) { + err = MuxDeleteAllNamedData(mux, kChunks[IDX_ANIM].tag); + if (err != WEBP_MUX_OK) return err; + } + return WEBP_MUX_OK; +} + +// Total size of a list of images. +static size_t ImageListDiskSize(const WebPMuxImage* wpi_list) { + size_t size = 0; + while (wpi_list != NULL) { + size += MuxImageDiskSize(wpi_list); + wpi_list = wpi_list->next_; + } + return size; +} + +// Write out the given list of images into 'dst'. +static uint8_t* ImageListEmit(const WebPMuxImage* wpi_list, uint8_t* dst) { + while (wpi_list != NULL) { + dst = MuxImageEmit(wpi_list, dst); + wpi_list = wpi_list->next_; + } + return dst; } WebPMuxError WebPMuxAssemble(WebPMux* mux, WebPData* assembled_data) { size_t size = 0; uint8_t* data = NULL; uint8_t* dst = NULL; - int num_frames; - int num_loop_chunks; WebPMuxError err; - if (mux == NULL || assembled_data == NULL) { + if (assembled_data == NULL) { return WEBP_MUX_INVALID_ARGUMENT; } + // Clean up returned data, in case something goes wrong. + memset(assembled_data, 0, sizeof(*assembled_data)); - // Remove LOOP chunk if unnecessary. - err = WebPMuxNumChunks(mux, kChunks[IDX_LOOP].id, &num_loop_chunks); - if (err != WEBP_MUX_OK) return err; - if (num_loop_chunks >= 1) { - err = WebPMuxNumChunks(mux, kChunks[IDX_FRAME].id, &num_frames); - if (err != WEBP_MUX_OK) return err; - if (num_frames == 0) { - err = DeleteLoopCount(mux); - if (err != WEBP_MUX_OK) return err; - } + if (mux == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; } - // Create VP8X chunk. + // Finalize mux. + err = MuxCleanup(mux); + if (err != WEBP_MUX_OK) return err; err = CreateVP8XChunk(mux); if (err != WEBP_MUX_OK) return err; // Allocate data. - size = ChunksListDiskSize(mux->vp8x_) + ChunksListDiskSize(mux->iccp_) - + ChunksListDiskSize(mux->loop_) + MuxImageListDiskSize(mux->images_) - + ChunksListDiskSize(mux->meta_) + ChunksListDiskSize(mux->unknown_) - + RIFF_HEADER_SIZE; + size = ChunkListDiskSize(mux->vp8x_) + ChunkListDiskSize(mux->iccp_) + + ChunkListDiskSize(mux->anim_) + ImageListDiskSize(mux->images_) + + ChunkListDiskSize(mux->exif_) + ChunkListDiskSize(mux->xmp_) + + ChunkListDiskSize(mux->unknown_) + RIFF_HEADER_SIZE; - data = (uint8_t*)malloc(size); + data = (uint8_t*)WebPSafeMalloc(1ULL, size); if (data == NULL) return WEBP_MUX_MEMORY_ERROR; // Emit header & chunks. dst = MuxEmitRiffHeader(data, size); dst = ChunkListEmit(mux->vp8x_, dst); dst = ChunkListEmit(mux->iccp_, dst); - dst = ChunkListEmit(mux->loop_, dst); - dst = MuxImageListEmit(mux->images_, dst); - dst = ChunkListEmit(mux->meta_, dst); + dst = ChunkListEmit(mux->anim_, dst); + dst = ImageListEmit(mux->images_, dst); + dst = ChunkListEmit(mux->exif_, dst); + dst = ChunkListEmit(mux->xmp_, dst); dst = ChunkListEmit(mux->unknown_, dst); assert(dst == data + size); // Validate mux. err = MuxValidate(mux); if (err != WEBP_MUX_OK) { - free(data); + WebPSafeFree(data); data = NULL; size = 0; } - // Finalize. - assembled_data->bytes_ = data; - assembled_data->size_ = size; + // Finalize data. + assembled_data->bytes = data; + assembled_data->size = size; return err; } //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/mux/muxi.h b/drivers/webp/mux/muxi.h index 2f06f3ed03..718b2f5d58 100644 --- a/drivers/webp/mux/muxi.h +++ b/drivers/webp/mux/muxi.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Internal header for mux library. @@ -15,34 +17,41 @@ #include <stdlib.h> #include "../dec/vp8i.h" #include "../dec/vp8li.h" -#include "../format_constants.h" -#include "../mux.h" +#include "../webp/mux.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif //------------------------------------------------------------------------------ // Defines and constants. +#define MUX_MAJ_VERSION 0 +#define MUX_MIN_VERSION 2 +#define MUX_REV_VERSION 2 + // Chunk object. typedef struct WebPChunk WebPChunk; struct WebPChunk { uint32_t tag_; int owner_; // True if *data_ memory is owned internally. - // VP8X, Loop, and other internally created chunks - // like frame/tile are always owned. + // VP8X, ANIM, and other internally created chunks + // like ANMF/FRGM are always owned. WebPData data_; WebPChunk* next_; }; -// MuxImage object. Store a full webp image (including frame/tile chunk, alpha +// MuxImage object. Store a full WebP image (including ANMF/FRGM chunk, ALPH // chunk and VP8/VP8L chunk), typedef struct WebPMuxImage WebPMuxImage; struct WebPMuxImage { - WebPChunk* header_; // Corresponds to WEBP_CHUNK_FRAME/WEBP_CHUNK_TILE. + WebPChunk* header_; // Corresponds to WEBP_CHUNK_ANMF/WEBP_CHUNK_FRGM. WebPChunk* alpha_; // Corresponds to WEBP_CHUNK_ALPHA. WebPChunk* img_; // Corresponds to WEBP_CHUNK_IMAGE. + WebPChunk* unknown_; // Corresponds to WEBP_CHUNK_UNKNOWN. + int width_; + int height_; + int has_alpha_; // Through ALPH chunk or as part of VP8L. int is_partial_; // True if only some of the chunks are filled. WebPMuxImage* next_; }; @@ -51,11 +60,14 @@ struct WebPMuxImage { struct WebPMux { WebPMuxImage* images_; WebPChunk* iccp_; - WebPChunk* meta_; - WebPChunk* loop_; + WebPChunk* exif_; + WebPChunk* xmp_; + WebPChunk* anim_; WebPChunk* vp8x_; - WebPChunk* unknown_; + WebPChunk* unknown_; + int canvas_width_; + int canvas_height_; }; // CHUNK_INDEX enum: used for indexing within 'kChunks' (defined below) only. @@ -65,13 +77,14 @@ struct WebPMux { typedef enum { IDX_VP8X = 0, IDX_ICCP, - IDX_LOOP, - IDX_FRAME, - IDX_TILE, + IDX_ANIM, + IDX_ANMF, + IDX_FRGM, IDX_ALPHA, IDX_VP8, IDX_VP8L, - IDX_META, + IDX_EXIF, + IDX_XMP, IDX_UNKNOWN, IDX_NIL, @@ -80,8 +93,6 @@ typedef enum { #define NIL_TAG 0x00000000u // To signal void chunk. -#define MKFOURCC(a, b, c, d) ((uint32_t)(a) | (b) << 8 | (c) << 16 | (d) << 24) - typedef struct { uint32_t tag; WebPChunkId id; @@ -91,55 +102,23 @@ typedef struct { extern const ChunkInfo kChunks[IDX_LAST_CHUNK]; //------------------------------------------------------------------------------ -// Helper functions. - -// Read 16, 24 or 32 bits stored in little-endian order. -static WEBP_INLINE int GetLE16(const uint8_t* const data) { - return (int)(data[0] << 0) | (data[1] << 8); -} - -static WEBP_INLINE int GetLE24(const uint8_t* const data) { - return GetLE16(data) | (data[2] << 16); -} - -static WEBP_INLINE uint32_t GetLE32(const uint8_t* const data) { - return (uint32_t)GetLE16(data) | (GetLE16(data + 2) << 16); -} - -// Store 16, 24 or 32 bits in little-endian order. -static WEBP_INLINE void PutLE16(uint8_t* const data, int val) { - assert(val < (1 << 16)); - data[0] = (val >> 0); - data[1] = (val >> 8); -} - -static WEBP_INLINE void PutLE24(uint8_t* const data, int val) { - assert(val < (1 << 24)); - PutLE16(data, val & 0xffff); - data[2] = (val >> 16); -} - -static WEBP_INLINE void PutLE32(uint8_t* const data, uint32_t val) { - PutLE16(data, (int)(val & 0xffff)); - PutLE16(data + 2, (int)(val >> 16)); -} - -static WEBP_INLINE size_t SizeWithPadding(size_t chunk_size) { - return CHUNK_HEADER_SIZE + ((chunk_size + 1) & ~1U); -} - -//------------------------------------------------------------------------------ // Chunk object management. // Initialize. void ChunkInit(WebPChunk* const chunk); -// Get chunk index from chunk tag. Returns IDX_NIL if not found. +// Get chunk index from chunk tag. Returns IDX_UNKNOWN if not found. CHUNK_INDEX ChunkGetIndexFromTag(uint32_t tag); -// Get chunk id from chunk tag. Returns WEBP_CHUNK_NIL if not found. +// Get chunk id from chunk tag. Returns WEBP_CHUNK_UNKNOWN if not found. WebPChunkId ChunkGetIdFromTag(uint32_t tag); +// Convert a fourcc string to a tag. +uint32_t ChunkGetTagFromFourCC(const char fourcc[4]); + +// Get chunk index from fourcc. Returns IDX_UNKNOWN if given fourcc is unknown. +CHUNK_INDEX ChunkGetIndexFromFourCC(const char fourcc[4]); + // Search for nth chunk with given 'tag' in the chunk list. // nth = 0 means "last of the list". WebPChunk* ChunkSearchList(WebPChunk* first, uint32_t nth, uint32_t tag); @@ -150,7 +129,8 @@ WebPMuxError ChunkAssignData(WebPChunk* chunk, const WebPData* const data, // Sets 'chunk' at nth position in the 'chunk_list'. // nth = 0 has the special meaning "last of the list". -WebPMuxError ChunkSetNth(const WebPChunk* chunk, WebPChunk** chunk_list, +// On success ownership is transferred from 'chunk' to the 'chunk_list'. +WebPMuxError ChunkSetNth(WebPChunk* chunk, WebPChunk** chunk_list, uint32_t nth); // Releases chunk and returns chunk->next_. @@ -159,23 +139,27 @@ WebPChunk* ChunkRelease(WebPChunk* const chunk); // Deletes given chunk & returns chunk->next_. WebPChunk* ChunkDelete(WebPChunk* const chunk); +// Deletes all chunks in the given chunk list. +void ChunkListDelete(WebPChunk** const chunk_list); + +// Returns size of the chunk including chunk header and padding byte (if any). +static WEBP_INLINE size_t SizeWithPadding(size_t chunk_size) { + return CHUNK_HEADER_SIZE + ((chunk_size + 1) & ~1U); +} + // Size of a chunk including header and padding. static WEBP_INLINE size_t ChunkDiskSize(const WebPChunk* chunk) { - const size_t data_size = chunk->data_.size_; + const size_t data_size = chunk->data_.size; assert(data_size < MAX_CHUNK_PAYLOAD); return SizeWithPadding(data_size); } // Total size of a list of chunks. -size_t ChunksListDiskSize(const WebPChunk* chunk_list); +size_t ChunkListDiskSize(const WebPChunk* chunk_list); // Write out the given list of chunks into 'dst'. uint8_t* ChunkListEmit(const WebPChunk* chunk_list, uint8_t* dst); -// Get the width & height of image stored in 'image_chunk'. -WebPMuxError MuxGetImageWidthHeight(const WebPChunk* const image_chunk, - int* const width, int* const height); - //------------------------------------------------------------------------------ // MuxImage object management. @@ -189,82 +173,59 @@ WebPMuxImage* MuxImageRelease(WebPMuxImage* const wpi); // 'wpi' can be NULL. WebPMuxImage* MuxImageDelete(WebPMuxImage* const wpi); -// Delete all images in 'wpi_list'. -void MuxImageDeleteAll(WebPMuxImage** const wpi_list); - // Count number of images matching the given tag id in the 'wpi_list'. +// If id == WEBP_CHUNK_NIL, all images will be matched. int MuxImageCount(const WebPMuxImage* wpi_list, WebPChunkId id); +// Update width/height/has_alpha info from chunks within wpi. +// Also remove ALPH chunk if not needed. +int MuxImageFinalize(WebPMuxImage* const wpi); + // Check if given ID corresponds to an image related chunk. static WEBP_INLINE int IsWPI(WebPChunkId id) { switch (id) { - case WEBP_CHUNK_FRAME: - case WEBP_CHUNK_TILE: + case WEBP_CHUNK_ANMF: + case WEBP_CHUNK_FRGM: case WEBP_CHUNK_ALPHA: case WEBP_CHUNK_IMAGE: return 1; default: return 0; } } -// Get a reference to appropriate chunk list within an image given chunk tag. -static WEBP_INLINE WebPChunk** MuxImageGetListFromId( - const WebPMuxImage* const wpi, WebPChunkId id) { - assert(wpi != NULL); - switch (id) { - case WEBP_CHUNK_FRAME: - case WEBP_CHUNK_TILE: return (WebPChunk**)&wpi->header_; - case WEBP_CHUNK_ALPHA: return (WebPChunk**)&wpi->alpha_; - case WEBP_CHUNK_IMAGE: return (WebPChunk**)&wpi->img_; - default: return NULL; - } -} - // Pushes 'wpi' at the end of 'wpi_list'. WebPMuxError MuxImagePush(const WebPMuxImage* wpi, WebPMuxImage** wpi_list); -// Delete nth image in the image list with given tag id. -WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth, - WebPChunkId id); +// Delete nth image in the image list. +WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth); -// Get nth image in the image list with given tag id. +// Get nth image in the image list. WebPMuxError MuxImageGetNth(const WebPMuxImage** wpi_list, uint32_t nth, - WebPChunkId id, WebPMuxImage** wpi); + WebPMuxImage** wpi); // Total size of the given image. size_t MuxImageDiskSize(const WebPMuxImage* const wpi); -// Total size of a list of images. -size_t MuxImageListDiskSize(const WebPMuxImage* wpi_list); - // Write out the given image into 'dst'. uint8_t* MuxImageEmit(const WebPMuxImage* const wpi, uint8_t* dst); -// Write out the given list of images into 'dst'. -uint8_t* MuxImageListEmit(const WebPMuxImage* wpi_list, uint8_t* dst); - //------------------------------------------------------------------------------ // Helper methods for mux. -// Checks if the given image list contains at least one lossless image. -int MuxHasLosslessImages(const WebPMuxImage* images); +// Checks if the given image list contains at least one image with alpha. +int MuxHasAlpha(const WebPMuxImage* images); // Write out RIFF header into 'data', given total data size 'size'. uint8_t* MuxEmitRiffHeader(uint8_t* const data, size_t size); // Returns the list where chunk with given ID is to be inserted in mux. -// Return value is NULL if this chunk should be inserted in mux->images_ list -// or if 'id' is not known. WebPChunk** MuxGetChunkListFromId(const WebPMux* mux, WebPChunkId id); -// Validates that the given mux has a single image. -WebPMuxError MuxValidateForImage(const WebPMux* const mux); - // Validates the given mux object. WebPMuxError MuxValidate(const WebPMux* const mux); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/mux/muxinternal.c b/drivers/webp/mux/muxinternal.c index 6c3c4fe60a..4babbe82fc 100644 --- a/drivers/webp/mux/muxinternal.c +++ b/drivers/webp/mux/muxinternal.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Internal objects and utils for mux. @@ -12,29 +14,33 @@ #include <assert.h> #include "./muxi.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "../utils/utils.h" #define UNDEFINED_CHUNK_SIZE (-1) const ChunkInfo kChunks[] = { { MKFOURCC('V', 'P', '8', 'X'), WEBP_CHUNK_VP8X, VP8X_CHUNK_SIZE }, { MKFOURCC('I', 'C', 'C', 'P'), WEBP_CHUNK_ICCP, UNDEFINED_CHUNK_SIZE }, - { MKFOURCC('L', 'O', 'O', 'P'), WEBP_CHUNK_LOOP, LOOP_CHUNK_SIZE }, - { MKFOURCC('F', 'R', 'M', ' '), WEBP_CHUNK_FRAME, FRAME_CHUNK_SIZE }, - { MKFOURCC('T', 'I', 'L', 'E'), WEBP_CHUNK_TILE, TILE_CHUNK_SIZE }, + { MKFOURCC('A', 'N', 'I', 'M'), WEBP_CHUNK_ANIM, ANIM_CHUNK_SIZE }, + { MKFOURCC('A', 'N', 'M', 'F'), WEBP_CHUNK_ANMF, ANMF_CHUNK_SIZE }, + { MKFOURCC('F', 'R', 'G', 'M'), WEBP_CHUNK_FRGM, FRGM_CHUNK_SIZE }, { MKFOURCC('A', 'L', 'P', 'H'), WEBP_CHUNK_ALPHA, UNDEFINED_CHUNK_SIZE }, { MKFOURCC('V', 'P', '8', ' '), WEBP_CHUNK_IMAGE, UNDEFINED_CHUNK_SIZE }, { MKFOURCC('V', 'P', '8', 'L'), WEBP_CHUNK_IMAGE, UNDEFINED_CHUNK_SIZE }, - { MKFOURCC('M', 'E', 'T', 'A'), WEBP_CHUNK_META, UNDEFINED_CHUNK_SIZE }, - { MKFOURCC('U', 'N', 'K', 'N'), WEBP_CHUNK_UNKNOWN, UNDEFINED_CHUNK_SIZE }, + { MKFOURCC('E', 'X', 'I', 'F'), WEBP_CHUNK_EXIF, UNDEFINED_CHUNK_SIZE }, + { MKFOURCC('X', 'M', 'P', ' '), WEBP_CHUNK_XMP, UNDEFINED_CHUNK_SIZE }, + { NIL_TAG, WEBP_CHUNK_UNKNOWN, UNDEFINED_CHUNK_SIZE }, - { NIL_TAG, WEBP_CHUNK_NIL, UNDEFINED_CHUNK_SIZE } + { NIL_TAG, WEBP_CHUNK_NIL, UNDEFINED_CHUNK_SIZE } }; //------------------------------------------------------------------------------ + +int WebPGetMuxVersion(void) { + return (MUX_MAJ_VERSION << 16) | (MUX_MIN_VERSION << 8) | MUX_REV_VERSION; +} + +//------------------------------------------------------------------------------ // Life of a chunk object. void ChunkInit(WebPChunk* const chunk) { @@ -60,9 +66,9 @@ WebPChunk* ChunkRelease(WebPChunk* const chunk) { CHUNK_INDEX ChunkGetIndexFromTag(uint32_t tag) { int i; for (i = 0; kChunks[i].tag != NIL_TAG; ++i) { - if (tag == kChunks[i].tag) return i; + if (tag == kChunks[i].tag) return (CHUNK_INDEX)i; } - return IDX_NIL; + return IDX_UNKNOWN; } WebPChunkId ChunkGetIdFromTag(uint32_t tag) { @@ -70,7 +76,16 @@ WebPChunkId ChunkGetIdFromTag(uint32_t tag) { for (i = 0; kChunks[i].tag != NIL_TAG; ++i) { if (tag == kChunks[i].tag) return kChunks[i].id; } - return WEBP_CHUNK_NIL; + return WEBP_CHUNK_UNKNOWN; +} + +uint32_t ChunkGetTagFromFourCC(const char fourcc[4]) { + return MKFOURCC(fourcc[0], fourcc[1], fourcc[2], fourcc[3]); +} + +CHUNK_INDEX ChunkGetIndexFromFourCC(const char fourcc[4]) { + const uint32_t tag = ChunkGetTagFromFourCC(fourcc); + return ChunkGetIndexFromTag(tag); } //------------------------------------------------------------------------------ @@ -78,7 +93,7 @@ WebPChunkId ChunkGetIdFromTag(uint32_t tag) { // Returns next chunk in the chunk list with the given tag. static WebPChunk* ChunkSearchNextInList(WebPChunk* chunk, uint32_t tag) { - while (chunk && chunk->tag_ != tag) { + while (chunk != NULL && chunk->tag_ != tag) { chunk = chunk->next_; } return chunk; @@ -87,7 +102,7 @@ static WebPChunk* ChunkSearchNextInList(WebPChunk* chunk, uint32_t tag) { WebPChunk* ChunkSearchList(WebPChunk* first, uint32_t nth, uint32_t tag) { uint32_t iter = nth; first = ChunkSearchNextInList(first, tag); - if (!first) return NULL; + if (first == NULL) return NULL; while (--iter != 0) { WebPChunk* next_chunk = ChunkSearchNextInList(first->next_, tag); @@ -99,14 +114,14 @@ WebPChunk* ChunkSearchList(WebPChunk* first, uint32_t nth, uint32_t tag) { // Outputs a pointer to 'prev_chunk->next_', // where 'prev_chunk' is the pointer to the chunk at position (nth - 1). -// Returns 1 if nth chunk was found, 0 otherwise. +// Returns true if nth chunk was found. static int ChunkSearchListToSet(WebPChunk** chunk_list, uint32_t nth, WebPChunk*** const location) { uint32_t count = 0; - assert(chunk_list); + assert(chunk_list != NULL); *location = chunk_list; - while (*chunk_list) { + while (*chunk_list != NULL) { WebPChunk* const cur_chunk = *chunk_list; ++count; if (count == nth) return 1; // Found. @@ -124,34 +139,25 @@ static int ChunkSearchListToSet(WebPChunk** chunk_list, uint32_t nth, WebPMuxError ChunkAssignData(WebPChunk* chunk, const WebPData* const data, int copy_data, uint32_t tag) { // For internally allocated chunks, always copy data & make it owner of data. - if (tag == kChunks[IDX_VP8X].tag || tag == kChunks[IDX_LOOP].tag) { + if (tag == kChunks[IDX_VP8X].tag || tag == kChunks[IDX_ANIM].tag) { copy_data = 1; } ChunkRelease(chunk); if (data != NULL) { - if (copy_data) { - // Copy data. - chunk->data_.bytes_ = (uint8_t*)malloc(data->size_); - if (chunk->data_.bytes_ == NULL) return WEBP_MUX_MEMORY_ERROR; - memcpy((uint8_t*)chunk->data_.bytes_, data->bytes_, data->size_); - chunk->data_.size_ = data->size_; - - // Chunk is owner of data. - chunk->owner_ = 1; - } else { - // Don't copy data. + if (copy_data) { // Copy data. + if (!WebPDataCopy(data, &chunk->data_)) return WEBP_MUX_MEMORY_ERROR; + chunk->owner_ = 1; // Chunk is owner of data. + } else { // Don't copy data. chunk->data_ = *data; } } - chunk->tag_ = tag; - return WEBP_MUX_OK; } -WebPMuxError ChunkSetNth(const WebPChunk* chunk, WebPChunk** chunk_list, +WebPMuxError ChunkSetNth(WebPChunk* chunk, WebPChunk** chunk_list, uint32_t nth) { WebPChunk* new_chunk; @@ -159,9 +165,10 @@ WebPMuxError ChunkSetNth(const WebPChunk* chunk, WebPChunk** chunk_list, return WEBP_MUX_NOT_FOUND; } - new_chunk = (WebPChunk*)malloc(sizeof(*new_chunk)); + new_chunk = (WebPChunk*)WebPSafeMalloc(1ULL, sizeof(*new_chunk)); if (new_chunk == NULL) return WEBP_MUX_MEMORY_ERROR; *new_chunk = *chunk; + chunk->owner_ = 0; new_chunk->next_ = *chunk_list; *chunk_list = new_chunk; return WEBP_MUX_OK; @@ -172,70 +179,47 @@ WebPMuxError ChunkSetNth(const WebPChunk* chunk, WebPChunk** chunk_list, WebPChunk* ChunkDelete(WebPChunk* const chunk) { WebPChunk* const next = ChunkRelease(chunk); - free(chunk); + WebPSafeFree(chunk); return next; } -//------------------------------------------------------------------------------ -// Chunk serialization methods. - -size_t ChunksListDiskSize(const WebPChunk* chunk_list) { - size_t size = 0; - while (chunk_list) { - size += ChunkDiskSize(chunk_list); - chunk_list = chunk_list->next_; +void ChunkListDelete(WebPChunk** const chunk_list) { + while (*chunk_list != NULL) { + *chunk_list = ChunkDelete(*chunk_list); } - return size; } +//------------------------------------------------------------------------------ +// Chunk serialization methods. + static uint8_t* ChunkEmit(const WebPChunk* const chunk, uint8_t* dst) { - const size_t chunk_size = chunk->data_.size_; + const size_t chunk_size = chunk->data_.size; assert(chunk); assert(chunk->tag_ != NIL_TAG); PutLE32(dst + 0, chunk->tag_); PutLE32(dst + TAG_SIZE, (uint32_t)chunk_size); assert(chunk_size == (uint32_t)chunk_size); - memcpy(dst + CHUNK_HEADER_SIZE, chunk->data_.bytes_, chunk_size); + memcpy(dst + CHUNK_HEADER_SIZE, chunk->data_.bytes, chunk_size); if (chunk_size & 1) dst[CHUNK_HEADER_SIZE + chunk_size] = 0; // Add padding. return dst + ChunkDiskSize(chunk); } uint8_t* ChunkListEmit(const WebPChunk* chunk_list, uint8_t* dst) { - while (chunk_list) { + while (chunk_list != NULL) { dst = ChunkEmit(chunk_list, dst); chunk_list = chunk_list->next_; } return dst; } -//------------------------------------------------------------------------------ -// Manipulation of a WebPData object. - -void WebPDataInit(WebPData* webp_data) { - if (webp_data != NULL) { - memset(webp_data, 0, sizeof(*webp_data)); - } -} - -void WebPDataClear(WebPData* webp_data) { - if (webp_data != NULL) { - free((void*)webp_data->bytes_); - WebPDataInit(webp_data); - } -} - -int WebPDataCopy(const WebPData* src, WebPData* dst) { - if (src == NULL || dst == NULL) return 0; - - WebPDataInit(dst); - if (src->bytes_ != NULL && src->size_ != 0) { - dst->bytes_ = (uint8_t*)malloc(src->size_); - if (dst->bytes_ == NULL) return 0; - memcpy((void*)dst->bytes_, src->bytes_, src->size_); - dst->size_ = src->size_; +size_t ChunkListDiskSize(const WebPChunk* chunk_list) { + size_t size = 0; + while (chunk_list != NULL) { + size += ChunkDiskSize(chunk_list); + chunk_list = chunk_list->next_; } - return 1; + return size; } //------------------------------------------------------------------------------ @@ -252,6 +236,7 @@ WebPMuxImage* MuxImageRelease(WebPMuxImage* const wpi) { ChunkDelete(wpi->header_); ChunkDelete(wpi->alpha_); ChunkDelete(wpi->img_); + ChunkListDelete(&wpi->unknown_); next = wpi->next_; MuxImageInit(wpi); @@ -261,14 +246,31 @@ WebPMuxImage* MuxImageRelease(WebPMuxImage* const wpi) { //------------------------------------------------------------------------------ // MuxImage search methods. +// Get a reference to appropriate chunk list within an image given chunk tag. +static WebPChunk** GetChunkListFromId(const WebPMuxImage* const wpi, + WebPChunkId id) { + assert(wpi != NULL); + switch (id) { + case WEBP_CHUNK_ANMF: + case WEBP_CHUNK_FRGM: return (WebPChunk**)&wpi->header_; + case WEBP_CHUNK_ALPHA: return (WebPChunk**)&wpi->alpha_; + case WEBP_CHUNK_IMAGE: return (WebPChunk**)&wpi->img_; + default: return NULL; + } +} + int MuxImageCount(const WebPMuxImage* wpi_list, WebPChunkId id) { int count = 0; const WebPMuxImage* current; for (current = wpi_list; current != NULL; current = current->next_) { - const WebPChunk* const wpi_chunk = *MuxImageGetListFromId(current, id); - if (wpi_chunk != NULL) { - const WebPChunkId wpi_chunk_id = ChunkGetIdFromTag(wpi_chunk->tag_); - if (wpi_chunk_id == id) ++count; + if (id == WEBP_CHUNK_NIL) { + ++count; // Special case: count all images. + } else { + const WebPChunk* const wpi_chunk = *GetChunkListFromId(current, id); + if (wpi_chunk != NULL) { + const WebPChunkId wpi_chunk_id = ChunkGetIdFromTag(wpi_chunk->tag_); + if (wpi_chunk_id == id) ++count; // Count images with a matching 'id'. + } } } return count; @@ -276,34 +278,22 @@ int MuxImageCount(const WebPMuxImage* wpi_list, WebPChunkId id) { // Outputs a pointer to 'prev_wpi->next_', // where 'prev_wpi' is the pointer to the image at position (nth - 1). -// Returns 1 if nth image with given id was found, 0 otherwise. +// Returns true if nth image was found. static int SearchImageToGetOrDelete(WebPMuxImage** wpi_list, uint32_t nth, - WebPChunkId id, WebPMuxImage*** const location) { uint32_t count = 0; assert(wpi_list); *location = wpi_list; - // Search makes sense only for the following. - assert(id == WEBP_CHUNK_FRAME || id == WEBP_CHUNK_TILE || - id == WEBP_CHUNK_IMAGE); - assert(id != WEBP_CHUNK_IMAGE || nth == 1); - if (nth == 0) { - nth = MuxImageCount(*wpi_list, id); + nth = MuxImageCount(*wpi_list, WEBP_CHUNK_NIL); if (nth == 0) return 0; // Not found. } - while (*wpi_list) { + while (*wpi_list != NULL) { WebPMuxImage* const cur_wpi = *wpi_list; - const WebPChunk* const wpi_chunk = *MuxImageGetListFromId(cur_wpi, id); - if (wpi_chunk != NULL) { - const WebPChunkId wpi_chunk_id = ChunkGetIdFromTag(wpi_chunk->tag_); - if (wpi_chunk_id == id) { - ++count; - if (count == nth) return 1; // Found. - } - } + ++count; + if (count == nth) return 1; // Found. wpi_list = &cur_wpi->next_; *location = wpi_list; } @@ -322,7 +312,7 @@ WebPMuxError MuxImagePush(const WebPMuxImage* wpi, WebPMuxImage** wpi_list) { wpi_list = &cur_wpi->next_; } - new_wpi = (WebPMuxImage*)malloc(sizeof(*new_wpi)); + new_wpi = (WebPMuxImage*)WebPSafeMalloc(1ULL, sizeof(*new_wpi)); if (new_wpi == NULL) return WEBP_MUX_MEMORY_ERROR; *new_wpi = *wpi; new_wpi->next_ = NULL; @@ -341,20 +331,13 @@ WebPMuxError MuxImagePush(const WebPMuxImage* wpi, WebPMuxImage** wpi_list) { WebPMuxImage* MuxImageDelete(WebPMuxImage* const wpi) { // Delete the components of wpi. If wpi is NULL this is a noop. WebPMuxImage* const next = MuxImageRelease(wpi); - free(wpi); + WebPSafeFree(wpi); return next; } -void MuxImageDeleteAll(WebPMuxImage** const wpi_list) { - while (*wpi_list) { - *wpi_list = MuxImageDelete(*wpi_list); - } -} - -WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth, - WebPChunkId id) { +WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth) { assert(wpi_list); - if (!SearchImageToGetOrDelete(wpi_list, nth, id, &wpi_list)) { + if (!SearchImageToGetOrDelete(wpi_list, nth, &wpi_list)) { return WEBP_MUX_NOT_FOUND; } *wpi_list = MuxImageDelete(*wpi_list); @@ -365,10 +348,10 @@ WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth, // MuxImage reader methods. WebPMuxError MuxImageGetNth(const WebPMuxImage** wpi_list, uint32_t nth, - WebPChunkId id, WebPMuxImage** wpi) { + WebPMuxImage** wpi) { assert(wpi_list); assert(wpi); - if (!SearchImageToGetOrDelete((WebPMuxImage**)wpi_list, nth, id, + if (!SearchImageToGetOrDelete((WebPMuxImage**)wpi_list, nth, (WebPMuxImage***)&wpi_list)) { return WEBP_MUX_NOT_FOUND; } @@ -385,47 +368,48 @@ size_t MuxImageDiskSize(const WebPMuxImage* const wpi) { if (wpi->header_ != NULL) size += ChunkDiskSize(wpi->header_); if (wpi->alpha_ != NULL) size += ChunkDiskSize(wpi->alpha_); if (wpi->img_ != NULL) size += ChunkDiskSize(wpi->img_); + if (wpi->unknown_ != NULL) size += ChunkListDiskSize(wpi->unknown_); return size; } -size_t MuxImageListDiskSize(const WebPMuxImage* wpi_list) { - size_t size = 0; - while (wpi_list) { - size += MuxImageDiskSize(wpi_list); - wpi_list = wpi_list->next_; +// Special case as ANMF/FRGM chunk encapsulates other image chunks. +static uint8_t* ChunkEmitSpecial(const WebPChunk* const header, + size_t total_size, uint8_t* dst) { + const size_t header_size = header->data_.size; + const size_t offset_to_next = total_size - CHUNK_HEADER_SIZE; + assert(header->tag_ == kChunks[IDX_ANMF].tag || + header->tag_ == kChunks[IDX_FRGM].tag); + PutLE32(dst + 0, header->tag_); + PutLE32(dst + TAG_SIZE, (uint32_t)offset_to_next); + assert(header_size == (uint32_t)header_size); + memcpy(dst + CHUNK_HEADER_SIZE, header->data_.bytes, header_size); + if (header_size & 1) { + dst[CHUNK_HEADER_SIZE + header_size] = 0; // Add padding. } - return size; + return dst + ChunkDiskSize(header); } uint8_t* MuxImageEmit(const WebPMuxImage* const wpi, uint8_t* dst) { // Ordering of chunks to be emitted is strictly as follows: - // 1. Frame/Tile chunk (if present). - // 2. Alpha chunk (if present). + // 1. ANMF/FRGM chunk (if present). + // 2. ALPH chunk (if present). // 3. VP8/VP8L chunk. assert(wpi); - if (wpi->header_ != NULL) dst = ChunkEmit(wpi->header_, dst); + if (wpi->header_ != NULL) { + dst = ChunkEmitSpecial(wpi->header_, MuxImageDiskSize(wpi), dst); + } if (wpi->alpha_ != NULL) dst = ChunkEmit(wpi->alpha_, dst); if (wpi->img_ != NULL) dst = ChunkEmit(wpi->img_, dst); - return dst; -} - -uint8_t* MuxImageListEmit(const WebPMuxImage* wpi_list, uint8_t* dst) { - while (wpi_list) { - dst = MuxImageEmit(wpi_list, dst); - wpi_list = wpi_list->next_; - } + if (wpi->unknown_ != NULL) dst = ChunkListEmit(wpi->unknown_, dst); return dst; } //------------------------------------------------------------------------------ // Helper methods for mux. -int MuxHasLosslessImages(const WebPMuxImage* images) { +int MuxHasAlpha(const WebPMuxImage* images) { while (images != NULL) { - assert(images->img_ != NULL); - if (images->img_->tag_ == kChunks[IDX_VP8L].tag) { - return 1; - } + if (images->has_alpha_) return 1; images = images->next_; } return 0; @@ -441,30 +425,13 @@ uint8_t* MuxEmitRiffHeader(uint8_t* const data, size_t size) { WebPChunk** MuxGetChunkListFromId(const WebPMux* mux, WebPChunkId id) { assert(mux != NULL); - switch(id) { + switch (id) { case WEBP_CHUNK_VP8X: return (WebPChunk**)&mux->vp8x_; case WEBP_CHUNK_ICCP: return (WebPChunk**)&mux->iccp_; - case WEBP_CHUNK_LOOP: return (WebPChunk**)&mux->loop_; - case WEBP_CHUNK_META: return (WebPChunk**)&mux->meta_; - case WEBP_CHUNK_UNKNOWN: return (WebPChunk**)&mux->unknown_; - default: return NULL; - } -} - -WebPMuxError MuxValidateForImage(const WebPMux* const mux) { - const int num_images = MuxImageCount(mux->images_, WEBP_CHUNK_IMAGE); - const int num_frames = MuxImageCount(mux->images_, WEBP_CHUNK_FRAME); - const int num_tiles = MuxImageCount(mux->images_, WEBP_CHUNK_TILE); - - if (num_images == 0) { - // No images in mux. - return WEBP_MUX_NOT_FOUND; - } else if (num_images == 1 && num_frames == 0 && num_tiles == 0) { - // Valid case (single image). - return WEBP_MUX_OK; - } else { - // Frame/Tile case OR an invalid mux. - return WEBP_MUX_INVALID_ARGUMENT; + case WEBP_CHUNK_ANIM: return (WebPChunk**)&mux->anim_; + case WEBP_CHUNK_EXIF: return (WebPChunk**)&mux->exif_; + case WEBP_CHUNK_XMP: return (WebPChunk**)&mux->xmp_; + default: return (WebPChunk**)&mux->unknown_; } } @@ -480,7 +447,7 @@ static int IsNotCompatible(int feature, int num_items) { // On success returns WEBP_MUX_OK and stores the chunk count in *num. static WebPMuxError ValidateChunk(const WebPMux* const mux, CHUNK_INDEX idx, WebPFeatureFlags feature, - WebPFeatureFlags vp8x_flags, + uint32_t vp8x_flags, int max, int* num) { const WebPMuxError err = WebPMuxNumChunks(mux, kChunks[idx].id, num); @@ -494,10 +461,11 @@ static WebPMuxError ValidateChunk(const WebPMux* const mux, CHUNK_INDEX idx, WebPMuxError MuxValidate(const WebPMux* const mux) { int num_iccp; - int num_meta; - int num_loop_chunks; + int num_exif; + int num_xmp; + int num_anim; int num_frames; - int num_tiles; + int num_fragments; int num_vp8x; int num_images; int num_alpha; @@ -517,29 +485,33 @@ WebPMuxError MuxValidate(const WebPMux* const mux) { err = ValidateChunk(mux, IDX_ICCP, ICCP_FLAG, flags, 1, &num_iccp); if (err != WEBP_MUX_OK) return err; + // At most one EXIF metadata. + err = ValidateChunk(mux, IDX_EXIF, EXIF_FLAG, flags, 1, &num_exif); + if (err != WEBP_MUX_OK) return err; + // At most one XMP metadata. - err = ValidateChunk(mux, IDX_META, META_FLAG, flags, 1, &num_meta); + err = ValidateChunk(mux, IDX_XMP, XMP_FLAG, flags, 1, &num_xmp); if (err != WEBP_MUX_OK) return err; - // Animation: ANIMATION_FLAG, loop chunk and frame chunk(s) are consistent. - // At most one loop chunk. - err = ValidateChunk(mux, IDX_LOOP, NO_FLAG, flags, 1, &num_loop_chunks); + // Animation: ANIMATION_FLAG, ANIM chunk and ANMF chunk(s) are consistent. + // At most one ANIM chunk. + err = ValidateChunk(mux, IDX_ANIM, NO_FLAG, flags, 1, &num_anim); if (err != WEBP_MUX_OK) return err; - err = ValidateChunk(mux, IDX_FRAME, NO_FLAG, flags, -1, &num_frames); + err = ValidateChunk(mux, IDX_ANMF, NO_FLAG, flags, -1, &num_frames); if (err != WEBP_MUX_OK) return err; { const int has_animation = !!(flags & ANIMATION_FLAG); - if (has_animation && (num_loop_chunks == 0 || num_frames == 0)) { + if (has_animation && (num_anim == 0 || num_frames == 0)) { return WEBP_MUX_INVALID_ARGUMENT; } - if (!has_animation && (num_loop_chunks == 1 || num_frames > 0)) { + if (!has_animation && (num_anim == 1 || num_frames > 0)) { return WEBP_MUX_INVALID_ARGUMENT; } } - // Tiling: TILE_FLAG and tile chunk(s) are consistent. - err = ValidateChunk(mux, IDX_TILE, TILE_FLAG, flags, -1, &num_tiles); + // Fragmentation: FRAGMENTS_FLAG and FRGM chunk(s) are consistent. + err = ValidateChunk(mux, IDX_FRGM, FRAGMENTS_FLAG, flags, -1, &num_fragments); if (err != WEBP_MUX_OK) return err; // Verify either VP8X chunk is present OR there is only one elem in @@ -551,16 +523,22 @@ WebPMuxError MuxValidate(const WebPMux* const mux) { if (num_vp8x == 0 && num_images != 1) return WEBP_MUX_INVALID_ARGUMENT; // ALPHA_FLAG & alpha chunk(s) are consistent. - if (num_vp8x > 0 && MuxHasLosslessImages(mux->images_)) { - // Special case: we have a VP8X chunk as well as some lossless images. - if (!(flags & ALPHA_FLAG)) return WEBP_MUX_INVALID_ARGUMENT; - } else { - err = ValidateChunk(mux, IDX_ALPHA, ALPHA_FLAG, flags, -1, &num_alpha); - if (err != WEBP_MUX_OK) return err; + if (MuxHasAlpha(mux->images_)) { + if (num_vp8x > 0) { + // VP8X chunk is present, so it should contain ALPHA_FLAG. + if (!(flags & ALPHA_FLAG)) return WEBP_MUX_INVALID_ARGUMENT; + } else { + // VP8X chunk is not present, so ALPH chunks should NOT be present either. + err = WebPMuxNumChunks(mux, WEBP_CHUNK_ALPHA, &num_alpha); + if (err != WEBP_MUX_OK) return err; + if (num_alpha > 0) return WEBP_MUX_INVALID_ARGUMENT; + } + } else { // Mux doesn't need alpha. So, ALPHA_FLAG should NOT be present. + if (flags & ALPHA_FLAG) return WEBP_MUX_INVALID_ARGUMENT; } - // num_tiles & num_images are consistent. - if (num_tiles > 0 && num_images != num_tiles) { + // num_fragments & num_images are consistent. + if (num_fragments > 0 && num_images != num_fragments) { return WEBP_MUX_INVALID_ARGUMENT; } @@ -571,6 +549,3 @@ WebPMuxError MuxValidate(const WebPMux* const mux) { //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/mux/muxread.c b/drivers/webp/mux/muxread.c index 21c3cfbaeb..8957a1e46e 100644 --- a/drivers/webp/mux/muxread.c +++ b/drivers/webp/mux/muxread.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Read APIs for mux. @@ -12,10 +14,7 @@ #include <assert.h> #include "./muxi.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "../utils/utils.h" //------------------------------------------------------------------------------ // Helper method(s). @@ -41,8 +40,9 @@ static WebPMuxError MuxGet(const WebPMux* const mux, CHUNK_INDEX idx, SWITCH_ID_LIST(IDX_VP8X, mux->vp8x_); SWITCH_ID_LIST(IDX_ICCP, mux->iccp_); - SWITCH_ID_LIST(IDX_LOOP, mux->loop_); - SWITCH_ID_LIST(IDX_META, mux->meta_); + SWITCH_ID_LIST(IDX_ANIM, mux->anim_); + SWITCH_ID_LIST(IDX_EXIF, mux->exif_); + SWITCH_ID_LIST(IDX_XMP, mux->xmp_); SWITCH_ID_LIST(IDX_UNKNOWN, mux->unknown_); return WEBP_MUX_NOT_FOUND; } @@ -50,15 +50,14 @@ static WebPMuxError MuxGet(const WebPMux* const mux, CHUNK_INDEX idx, // Fill the chunk with the given data (includes chunk header bytes), after some // verifications. -static WebPMuxError ChunkVerifyAndAssignData(WebPChunk* chunk, - const uint8_t* data, - size_t data_size, size_t riff_size, - int copy_data) { +static WebPMuxError ChunkVerifyAndAssign(WebPChunk* chunk, + const uint8_t* data, size_t data_size, + size_t riff_size, int copy_data) { uint32_t chunk_size; WebPData chunk_data; // Sanity checks. - if (data_size < TAG_SIZE) return WEBP_MUX_NOT_ENOUGH_DATA; + if (data_size < CHUNK_HEADER_SIZE) return WEBP_MUX_NOT_ENOUGH_DATA; chunk_size = GetLE32(data + TAG_SIZE); { @@ -68,11 +67,103 @@ static WebPMuxError ChunkVerifyAndAssignData(WebPChunk* chunk, } // Data assignment. - chunk_data.bytes_ = data + CHUNK_HEADER_SIZE; - chunk_data.size_ = chunk_size; + chunk_data.bytes = data + CHUNK_HEADER_SIZE; + chunk_data.size = chunk_size; return ChunkAssignData(chunk, &chunk_data, copy_data, GetLE32(data + 0)); } +int MuxImageFinalize(WebPMuxImage* const wpi) { + const WebPChunk* const img = wpi->img_; + const WebPData* const image = &img->data_; + const int is_lossless = (img->tag_ == kChunks[IDX_VP8L].tag); + int w, h; + int vp8l_has_alpha = 0; + const int ok = is_lossless ? + VP8LGetInfo(image->bytes, image->size, &w, &h, &vp8l_has_alpha) : + VP8GetInfo(image->bytes, image->size, image->size, &w, &h); + assert(img != NULL); + if (ok) { + // Ignore ALPH chunk accompanying VP8L. + if (is_lossless && (wpi->alpha_ != NULL)) { + ChunkDelete(wpi->alpha_); + wpi->alpha_ = NULL; + } + wpi->width_ = w; + wpi->height_ = h; + wpi->has_alpha_ = vp8l_has_alpha || (wpi->alpha_ != NULL); + } + return ok; +} + +static int MuxImageParse(const WebPChunk* const chunk, int copy_data, + WebPMuxImage* const wpi) { + const uint8_t* bytes = chunk->data_.bytes; + size_t size = chunk->data_.size; + const uint8_t* const last = bytes + size; + WebPChunk subchunk; + size_t subchunk_size; + ChunkInit(&subchunk); + + assert(chunk->tag_ == kChunks[IDX_ANMF].tag || + chunk->tag_ == kChunks[IDX_FRGM].tag); + assert(!wpi->is_partial_); + + // ANMF/FRGM. + { + const size_t hdr_size = (chunk->tag_ == kChunks[IDX_ANMF].tag) ? + ANMF_CHUNK_SIZE : FRGM_CHUNK_SIZE; + const WebPData temp = { bytes, hdr_size }; + // Each of ANMF and FRGM chunk contain a header at the beginning. So, its + // size should at least be 'hdr_size'. + if (size < hdr_size) goto Fail; + ChunkAssignData(&subchunk, &temp, copy_data, chunk->tag_); + } + ChunkSetNth(&subchunk, &wpi->header_, 1); + wpi->is_partial_ = 1; // Waiting for ALPH and/or VP8/VP8L chunks. + + // Rest of the chunks. + subchunk_size = ChunkDiskSize(&subchunk) - CHUNK_HEADER_SIZE; + bytes += subchunk_size; + size -= subchunk_size; + + while (bytes != last) { + ChunkInit(&subchunk); + if (ChunkVerifyAndAssign(&subchunk, bytes, size, size, + copy_data) != WEBP_MUX_OK) { + goto Fail; + } + switch (ChunkGetIdFromTag(subchunk.tag_)) { + case WEBP_CHUNK_ALPHA: + if (wpi->alpha_ != NULL) goto Fail; // Consecutive ALPH chunks. + if (ChunkSetNth(&subchunk, &wpi->alpha_, 1) != WEBP_MUX_OK) goto Fail; + wpi->is_partial_ = 1; // Waiting for a VP8 chunk. + break; + case WEBP_CHUNK_IMAGE: + if (ChunkSetNth(&subchunk, &wpi->img_, 1) != WEBP_MUX_OK) goto Fail; + if (!MuxImageFinalize(wpi)) goto Fail; + wpi->is_partial_ = 0; // wpi is completely filled. + break; + case WEBP_CHUNK_UNKNOWN: + if (wpi->is_partial_) goto Fail; // Encountered an unknown chunk + // before some image chunks. + if (ChunkSetNth(&subchunk, &wpi->unknown_, 0) != WEBP_MUX_OK) goto Fail; + break; + default: + goto Fail; + break; + } + subchunk_size = ChunkDiskSize(&subchunk); + bytes += subchunk_size; + size -= subchunk_size; + } + if (wpi->is_partial_) goto Fail; + return 1; + + Fail: + ChunkRelease(&subchunk); + return 0; +} + //------------------------------------------------------------------------------ // Create a mux object from WebP-RIFF data. @@ -94,8 +185,8 @@ WebPMux* WebPMuxCreateInternal(const WebPData* bitstream, int copy_data, } if (bitstream == NULL) return NULL; - data = bitstream->bytes_; - size = bitstream->size_; + data = bitstream->bytes; + size = bitstream->size; if (data == NULL) return NULL; if (size < RIFF_HEADER_SIZE) return NULL; @@ -129,48 +220,55 @@ WebPMux* WebPMuxCreateInternal(const WebPData* bitstream, int copy_data, data += RIFF_HEADER_SIZE; size -= RIFF_HEADER_SIZE; - wpi = (WebPMuxImage*)malloc(sizeof(*wpi)); + wpi = (WebPMuxImage*)WebPSafeMalloc(1ULL, sizeof(*wpi)); if (wpi == NULL) goto Err; MuxImageInit(wpi); // Loop over chunks. while (data != end) { + size_t data_size; WebPChunkId id; - WebPMuxError err; - - err = ChunkVerifyAndAssignData(&chunk, data, size, riff_size, copy_data); - if (err != WEBP_MUX_OK) goto Err; - + WebPChunk** chunk_list; + if (ChunkVerifyAndAssign(&chunk, data, size, riff_size, + copy_data) != WEBP_MUX_OK) { + goto Err; + } + data_size = ChunkDiskSize(&chunk); id = ChunkGetIdFromTag(chunk.tag_); - - if (IsWPI(id)) { // An image chunk (frame/tile/alpha/vp8). - WebPChunk** wpi_chunk_ptr = - MuxImageGetListFromId(wpi, id); // Image chunk to set. - assert(wpi_chunk_ptr != NULL); - if (*wpi_chunk_ptr != NULL) goto Err; // Consecutive alpha chunks or - // consecutive frame/tile chunks. - if (ChunkSetNth(&chunk, wpi_chunk_ptr, 1) != WEBP_MUX_OK) goto Err; - if (id == WEBP_CHUNK_IMAGE) { + switch (id) { + case WEBP_CHUNK_ALPHA: + if (wpi->alpha_ != NULL) goto Err; // Consecutive ALPH chunks. + if (ChunkSetNth(&chunk, &wpi->alpha_, 1) != WEBP_MUX_OK) goto Err; + wpi->is_partial_ = 1; // Waiting for a VP8 chunk. + break; + case WEBP_CHUNK_IMAGE: + if (ChunkSetNth(&chunk, &wpi->img_, 1) != WEBP_MUX_OK) goto Err; + if (!MuxImageFinalize(wpi)) goto Err; wpi->is_partial_ = 0; // wpi is completely filled. + PushImage: // Add this to mux->images_ list. if (MuxImagePush(wpi, &mux->images_) != WEBP_MUX_OK) goto Err; MuxImageInit(wpi); // Reset for reading next image. - } else { - wpi->is_partial_ = 1; // wpi is only partially filled. - } - } else { // A non-image chunk. - WebPChunk** chunk_list; - if (wpi->is_partial_) goto Err; // Encountered a non-image chunk before - // getting all chunks of an image. - chunk_list = MuxGetChunkListFromId(mux, id); // List to add this chunk. - if (chunk_list == NULL) chunk_list = &mux->unknown_; - if (ChunkSetNth(&chunk, chunk_list, 0) != WEBP_MUX_OK) goto Err; - } - { - const size_t data_size = ChunkDiskSize(&chunk); - data += data_size; - size -= data_size; + break; + case WEBP_CHUNK_ANMF: + if (wpi->is_partial_) goto Err; // Previous wpi is still incomplete. + if (!MuxImageParse(&chunk, copy_data, wpi)) goto Err; + ChunkRelease(&chunk); + goto PushImage; + break; + default: // A non-image chunk. + if (wpi->is_partial_) goto Err; // Encountered a non-image chunk before + // getting all chunks of an image. + chunk_list = MuxGetChunkListFromId(mux, id); // List to add this chunk. + if (ChunkSetNth(&chunk, chunk_list, 0) != WEBP_MUX_OK) goto Err; + if (id == WEBP_CHUNK_VP8X) { // grab global specs + mux->canvas_width_ = GetLE24(data + 12) + 1; + mux->canvas_height_ = GetLE24(data + 15) + 1; + } + break; } + data += data_size; + size -= data_size; ChunkInit(&chunk); } @@ -190,31 +288,74 @@ WebPMux* WebPMuxCreateInternal(const WebPData* bitstream, int copy_data, //------------------------------------------------------------------------------ // Get API(s). -WebPMuxError WebPMuxGetFeatures(const WebPMux* mux, uint32_t* flags) { - WebPData data; - WebPMuxError err; +// Validates that the given mux has a single image. +static WebPMuxError ValidateForSingleImage(const WebPMux* const mux) { + const int num_images = MuxImageCount(mux->images_, WEBP_CHUNK_IMAGE); + const int num_frames = MuxImageCount(mux->images_, WEBP_CHUNK_ANMF); + const int num_fragments = MuxImageCount(mux->images_, WEBP_CHUNK_FRGM); + + if (num_images == 0) { + // No images in mux. + return WEBP_MUX_NOT_FOUND; + } else if (num_images == 1 && num_frames == 0 && num_fragments == 0) { + // Valid case (single image). + return WEBP_MUX_OK; + } else { + // Frame/Fragment case OR an invalid mux. + return WEBP_MUX_INVALID_ARGUMENT; + } +} - if (mux == NULL || flags == NULL) return WEBP_MUX_INVALID_ARGUMENT; - *flags = 0; +// Get the canvas width, height and flags after validating that VP8X/VP8/VP8L +// chunk and canvas size are valid. +static WebPMuxError MuxGetCanvasInfo(const WebPMux* const mux, + int* width, int* height, uint32_t* flags) { + int w, h; + uint32_t f = 0; + WebPData data; + assert(mux != NULL); // Check if VP8X chunk is present. - err = MuxGet(mux, IDX_VP8X, 1, &data); - if (err == WEBP_MUX_NOT_FOUND) { - // Check if VP8/VP8L chunk is present. - err = WebPMuxGetImage(mux, &data); - WebPDataClear(&data); - return err; - } else if (err != WEBP_MUX_OK) { - return err; + if (MuxGet(mux, IDX_VP8X, 1, &data) == WEBP_MUX_OK) { + if (data.size < VP8X_CHUNK_SIZE) return WEBP_MUX_BAD_DATA; + f = GetLE32(data.bytes + 0); + w = GetLE24(data.bytes + 4) + 1; + h = GetLE24(data.bytes + 7) + 1; + } else { + const WebPMuxImage* const wpi = mux->images_; + // Grab user-forced canvas size as default. + w = mux->canvas_width_; + h = mux->canvas_height_; + if (w == 0 && h == 0 && ValidateForSingleImage(mux) == WEBP_MUX_OK) { + // single image and not forced canvas size => use dimension of first frame + assert(wpi != NULL); + w = wpi->width_; + h = wpi->height_; + } + if (wpi != NULL) { + if (wpi->has_alpha_) f |= ALPHA_FLAG; + } } + if (w * (uint64_t)h >= MAX_IMAGE_AREA) return WEBP_MUX_BAD_DATA; - if (data.size_ < CHUNK_SIZE_BYTES) return WEBP_MUX_BAD_DATA; - - // All OK. Fill up flags. - *flags = GetLE32(data.bytes_); + if (width != NULL) *width = w; + if (height != NULL) *height = h; + if (flags != NULL) *flags = f; return WEBP_MUX_OK; } +WebPMuxError WebPMuxGetCanvasSize(const WebPMux* mux, int* width, int* height) { + if (mux == NULL || width == NULL || height == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; + } + return MuxGetCanvasInfo(mux, width, height, NULL); +} + +WebPMuxError WebPMuxGetFeatures(const WebPMux* mux, uint32_t* flags) { + if (mux == NULL || flags == NULL) return WEBP_MUX_INVALID_ARGUMENT; + return MuxGetCanvasInfo(mux, NULL, NULL, flags); +} + static uint8_t* EmitVP8XChunk(uint8_t* const dst, int width, int height, uint32_t flags) { const size_t vp8x_size = CHUNK_HEADER_SIZE + VP8X_CHUNK_SIZE; @@ -230,7 +371,7 @@ static uint8_t* EmitVP8XChunk(uint8_t* const dst, int width, } // Assemble a single image WebP bitstream from 'wpi'. -static WebPMuxError SynthesizeBitstream(WebPMuxImage* const wpi, +static WebPMuxError SynthesizeBitstream(const WebPMuxImage* const wpi, WebPData* const bitstream) { uint8_t* dst; @@ -238,25 +379,17 @@ static WebPMuxError SynthesizeBitstream(WebPMuxImage* const wpi, const int need_vp8x = (wpi->alpha_ != NULL); const size_t vp8x_size = need_vp8x ? CHUNK_HEADER_SIZE + VP8X_CHUNK_SIZE : 0; const size_t alpha_size = need_vp8x ? ChunkDiskSize(wpi->alpha_) : 0; - // Note: No need to output FRM/TILE chunk for a single image. + // Note: No need to output ANMF/FRGM chunk for a single image. const size_t size = RIFF_HEADER_SIZE + vp8x_size + alpha_size + ChunkDiskSize(wpi->img_); - uint8_t* const data = (uint8_t*)malloc(size); + uint8_t* const data = (uint8_t*)WebPSafeMalloc(1ULL, size); if (data == NULL) return WEBP_MUX_MEMORY_ERROR; // Main RIFF header. dst = MuxEmitRiffHeader(data, size); if (need_vp8x) { - int w, h; - WebPMuxError err; - assert(wpi->img_ != NULL); - err = MuxGetImageWidthHeight(wpi->img_, &w, &h); - if (err != WEBP_MUX_OK) { - free(data); - return err; - } - dst = EmitVP8XChunk(dst, w, h, ALPHA_FLAG); // VP8X. + dst = EmitVP8XChunk(dst, wpi->width_, wpi->height_, ALPHA_FLAG); // VP8X. dst = ChunkListEmit(wpi->alpha_, dst); // ALPH. } @@ -265,107 +398,115 @@ static WebPMuxError SynthesizeBitstream(WebPMuxImage* const wpi, assert(dst == data + size); // Output. - bitstream->bytes_ = data; - bitstream->size_ = size; + bitstream->bytes = data; + bitstream->size = size; return WEBP_MUX_OK; } -WebPMuxError WebPMuxGetImage(const WebPMux* mux, WebPData* bitstream) { - WebPMuxError err; - WebPMuxImage* wpi = NULL; - - if (mux == NULL || bitstream == NULL) { +WebPMuxError WebPMuxGetChunk(const WebPMux* mux, const char fourcc[4], + WebPData* chunk_data) { + CHUNK_INDEX idx; + if (mux == NULL || fourcc == NULL || chunk_data == NULL) { return WEBP_MUX_INVALID_ARGUMENT; } - - err = MuxValidateForImage(mux); - if (err != WEBP_MUX_OK) return err; - - // All well. Get the image. - err = MuxImageGetNth((const WebPMuxImage**)&mux->images_, 1, WEBP_CHUNK_IMAGE, - &wpi); - assert(err == WEBP_MUX_OK); // Already tested above. - - return SynthesizeBitstream(wpi, bitstream); -} - -WebPMuxError WebPMuxGetMetadata(const WebPMux* mux, WebPData* metadata) { - if (mux == NULL || metadata == NULL) return WEBP_MUX_INVALID_ARGUMENT; - return MuxGet(mux, IDX_META, 1, metadata); + idx = ChunkGetIndexFromFourCC(fourcc); + if (IsWPI(kChunks[idx].id)) { // An image chunk. + return WEBP_MUX_INVALID_ARGUMENT; + } else if (idx != IDX_UNKNOWN) { // A known chunk type. + return MuxGet(mux, idx, 1, chunk_data); + } else { // An unknown chunk type. + const WebPChunk* const chunk = + ChunkSearchList(mux->unknown_, 1, ChunkGetTagFromFourCC(fourcc)); + if (chunk == NULL) return WEBP_MUX_NOT_FOUND; + *chunk_data = chunk->data_; + return WEBP_MUX_OK; + } } -WebPMuxError WebPMuxGetColorProfile(const WebPMux* mux, - WebPData* color_profile) { - if (mux == NULL || color_profile == NULL) return WEBP_MUX_INVALID_ARGUMENT; - return MuxGet(mux, IDX_ICCP, 1, color_profile); +static WebPMuxError MuxGetImageInternal(const WebPMuxImage* const wpi, + WebPMuxFrameInfo* const info) { + // Set some defaults for unrelated fields. + info->x_offset = 0; + info->y_offset = 0; + info->duration = 1; + info->dispose_method = WEBP_MUX_DISPOSE_NONE; + info->blend_method = WEBP_MUX_BLEND; + // Extract data for related fields. + info->id = ChunkGetIdFromTag(wpi->img_->tag_); + return SynthesizeBitstream(wpi, &info->bitstream); } -WebPMuxError WebPMuxGetLoopCount(const WebPMux* mux, int* loop_count) { - WebPData image; - WebPMuxError err; - - if (mux == NULL || loop_count == NULL) return WEBP_MUX_INVALID_ARGUMENT; - - err = MuxGet(mux, IDX_LOOP, 1, &image); - if (err != WEBP_MUX_OK) return err; - if (image.size_ < kChunks[WEBP_CHUNK_LOOP].size) return WEBP_MUX_BAD_DATA; - *loop_count = GetLE16(image.bytes_); - - return WEBP_MUX_OK; +static WebPMuxError MuxGetFrameFragmentInternal(const WebPMuxImage* const wpi, + WebPMuxFrameInfo* const frame) { + const int is_frame = (wpi->header_->tag_ == kChunks[IDX_ANMF].tag); + const CHUNK_INDEX idx = is_frame ? IDX_ANMF : IDX_FRGM; + const WebPData* frame_frgm_data; + if (!is_frame) return WEBP_MUX_INVALID_ARGUMENT; + assert(wpi->header_ != NULL); // Already checked by WebPMuxGetFrame(). + // Get frame/fragment chunk. + frame_frgm_data = &wpi->header_->data_; + if (frame_frgm_data->size < kChunks[idx].size) return WEBP_MUX_BAD_DATA; + // Extract info. + frame->x_offset = 2 * GetLE24(frame_frgm_data->bytes + 0); + frame->y_offset = 2 * GetLE24(frame_frgm_data->bytes + 3); + if (is_frame) { + const uint8_t bits = frame_frgm_data->bytes[15]; + frame->duration = GetLE24(frame_frgm_data->bytes + 12); + frame->dispose_method = + (bits & 1) ? WEBP_MUX_DISPOSE_BACKGROUND : WEBP_MUX_DISPOSE_NONE; + frame->blend_method = (bits & 2) ? WEBP_MUX_NO_BLEND : WEBP_MUX_BLEND; + } else { // Defaults for unused values. + frame->duration = 1; + frame->dispose_method = WEBP_MUX_DISPOSE_NONE; + frame->blend_method = WEBP_MUX_BLEND; + } + frame->id = ChunkGetIdFromTag(wpi->header_->tag_); + return SynthesizeBitstream(wpi, &frame->bitstream); } -static WebPMuxError MuxGetFrameTileInternal( - const WebPMux* const mux, uint32_t nth, WebPData* const bitstream, - int* const x_offset, int* const y_offset, int* const duration, - uint32_t tag) { - const WebPData* frame_tile_data; +WebPMuxError WebPMuxGetFrame( + const WebPMux* mux, uint32_t nth, WebPMuxFrameInfo* frame) { WebPMuxError err; WebPMuxImage* wpi; - const int is_frame = (tag == kChunks[WEBP_CHUNK_FRAME].tag) ? 1 : 0; - const CHUNK_INDEX idx = is_frame ? IDX_FRAME : IDX_TILE; - const WebPChunkId id = kChunks[idx].id; - - if (mux == NULL || bitstream == NULL || - x_offset == NULL || y_offset == NULL || (is_frame && duration == NULL)) { + // Sanity checks. + if (mux == NULL || frame == NULL) { return WEBP_MUX_INVALID_ARGUMENT; } // Get the nth WebPMuxImage. - err = MuxImageGetNth((const WebPMuxImage**)&mux->images_, nth, id, &wpi); + err = MuxImageGetNth((const WebPMuxImage**)&mux->images_, nth, &wpi); if (err != WEBP_MUX_OK) return err; - // Get frame chunk. - assert(wpi->header_ != NULL); // As MuxImageGetNth() already checked header_. - frame_tile_data = &wpi->header_->data_; + // Get frame info. + if (wpi->header_ == NULL) { + return MuxGetImageInternal(wpi, frame); + } else { + return MuxGetFrameFragmentInternal(wpi, frame); + } +} - if (frame_tile_data->size_ < kChunks[idx].size) return WEBP_MUX_BAD_DATA; - *x_offset = 2 * GetLE24(frame_tile_data->bytes_ + 0); - *y_offset = 2 * GetLE24(frame_tile_data->bytes_ + 3); - if (is_frame) *duration = 1 + GetLE24(frame_tile_data->bytes_ + 12); +WebPMuxError WebPMuxGetAnimationParams(const WebPMux* mux, + WebPMuxAnimParams* params) { + WebPData anim; + WebPMuxError err; - return SynthesizeBitstream(wpi, bitstream); -} + if (mux == NULL || params == NULL) return WEBP_MUX_INVALID_ARGUMENT; -WebPMuxError WebPMuxGetFrame(const WebPMux* mux, uint32_t nth, - WebPData* bitstream, - int* x_offset, int* y_offset, int* duration) { - return MuxGetFrameTileInternal(mux, nth, bitstream, x_offset, y_offset, - duration, kChunks[IDX_FRAME].tag); -} + err = MuxGet(mux, IDX_ANIM, 1, &anim); + if (err != WEBP_MUX_OK) return err; + if (anim.size < kChunks[WEBP_CHUNK_ANIM].size) return WEBP_MUX_BAD_DATA; + params->bgcolor = GetLE32(anim.bytes); + params->loop_count = GetLE16(anim.bytes + 4); -WebPMuxError WebPMuxGetTile(const WebPMux* mux, uint32_t nth, - WebPData* bitstream, - int* x_offset, int* y_offset) { - return MuxGetFrameTileInternal(mux, nth, bitstream, x_offset, y_offset, NULL, - kChunks[IDX_TILE].tag); + return WEBP_MUX_OK; } // Get chunk index from chunk id. Returns IDX_NIL if not found. static CHUNK_INDEX ChunkGetIndexFromId(WebPChunkId id) { int i; for (i = 0; kChunks[i].id != WEBP_CHUNK_NIL; ++i) { - if (id == kChunks[i].id) return i; + if (id == kChunks[i].id) return (CHUNK_INDEX)i; } return IDX_NIL; } @@ -393,19 +534,11 @@ WebPMuxError WebPMuxNumChunks(const WebPMux* mux, *num_elements = MuxImageCount(mux->images_, id); } else { WebPChunk* const* chunk_list = MuxGetChunkListFromId(mux, id); - if (chunk_list == NULL) { - *num_elements = 0; - } else { - const CHUNK_INDEX idx = ChunkGetIndexFromId(id); - *num_elements = CountChunks(*chunk_list, kChunks[idx].tag); - } + const CHUNK_INDEX idx = ChunkGetIndexFromId(id); + *num_elements = CountChunks(*chunk_list, kChunks[idx].tag); } return WEBP_MUX_OK; } //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/types.h b/drivers/webp/types.h index 3e27190bef..98fff35a11 100644 --- a/drivers/webp/types.h +++ b/drivers/webp/types.h @@ -1,8 +1,10 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Common types @@ -16,10 +18,11 @@ #ifndef _MSC_VER #include <inttypes.h> -#ifdef __STRICT_ANSI__ -#define WEBP_INLINE -#else /* __STRICT_ANSI__ */ +#if defined(__cplusplus) || !defined(__STRICT_ANSI__) || \ + (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) #define WEBP_INLINE inline +#else +#define WEBP_INLINE #endif #else typedef signed char int8_t; @@ -36,7 +39,11 @@ typedef long long int int64_t; #ifndef WEBP_EXTERN // This explicitly marks library functions and allows for changing the // signature for e.g., Windows DLL builds. -#define WEBP_EXTERN(type) extern type +# if defined(__GNUC__) && __GNUC__ >= 4 +# define WEBP_EXTERN(type) extern __attribute__ ((visibility ("default"))) type +# else +# define WEBP_EXTERN(type) extern type +# endif /* __GNUC__ >= 4 */ #endif /* WEBP_EXTERN */ // Macro to check ABI compatibility (same major revision number) diff --git a/drivers/webp/utils/bit_reader.c b/drivers/webp/utils/bit_reader.c index 1afb1db890..cd265321bb 100644 --- a/drivers/webp/utils/bit_reader.c +++ b/drivers/webp/utils/bit_reader.c @@ -1,36 +1,54 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // -// Boolean decoder +// Boolean decoder non-inlined methods // // Author: Skal (pascal.massimino@gmail.com) -#include "./bit_reader.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" #endif -#define MK(X) (((bit_t)(X) << (BITS)) | (MASK)) +#include "./bit_reader_inl.h" //------------------------------------------------------------------------------ // VP8BitReader +void VP8BitReaderSetBuffer(VP8BitReader* const br, + const uint8_t* const start, + size_t size) { + br->buf_ = start; + br->buf_end_ = start + size; + br->buf_max_ = + (size >= sizeof(lbit_t)) ? start + size - sizeof(lbit_t) + 1 + : start; +} + void VP8InitBitReader(VP8BitReader* const br, - const uint8_t* const start, const uint8_t* const end) { + const uint8_t* const start, size_t size) { assert(br != NULL); assert(start != NULL); - assert(start <= end); - br->range_ = MK(255 - 1); - br->buf_ = start; - br->buf_end_ = end; + assert(size < (1u << 31)); // limit ensured by format and upstream checks + br->range_ = 255 - 1; br->value_ = 0; - br->missing_ = 8; // to load the very first 8bits + br->bits_ = -8; // to load the very first 8bits br->eof_ = 0; + VP8BitReaderSetBuffer(br, start, size); + VP8LoadNewBytes(br); +} + +void VP8RemapBitReader(VP8BitReader* const br, ptrdiff_t offset) { + if (br->buf_ != NULL) { + br->buf_ += offset; + br->buf_end_ += offset; + br->buf_max_ += offset; + } } const uint8_t kVP8Log2Range[128] = { @@ -45,36 +63,38 @@ const uint8_t kVP8Log2Range[128] = { 0 }; -// range = (range << kVP8Log2Range[range]) + trailing 1's -const bit_t kVP8NewRange[128] = { - MK(127), MK(127), MK(191), MK(127), MK(159), MK(191), MK(223), MK(127), - MK(143), MK(159), MK(175), MK(191), MK(207), MK(223), MK(239), MK(127), - MK(135), MK(143), MK(151), MK(159), MK(167), MK(175), MK(183), MK(191), - MK(199), MK(207), MK(215), MK(223), MK(231), MK(239), MK(247), MK(127), - MK(131), MK(135), MK(139), MK(143), MK(147), MK(151), MK(155), MK(159), - MK(163), MK(167), MK(171), MK(175), MK(179), MK(183), MK(187), MK(191), - MK(195), MK(199), MK(203), MK(207), MK(211), MK(215), MK(219), MK(223), - MK(227), MK(231), MK(235), MK(239), MK(243), MK(247), MK(251), MK(127), - MK(129), MK(131), MK(133), MK(135), MK(137), MK(139), MK(141), MK(143), - MK(145), MK(147), MK(149), MK(151), MK(153), MK(155), MK(157), MK(159), - MK(161), MK(163), MK(165), MK(167), MK(169), MK(171), MK(173), MK(175), - MK(177), MK(179), MK(181), MK(183), MK(185), MK(187), MK(189), MK(191), - MK(193), MK(195), MK(197), MK(199), MK(201), MK(203), MK(205), MK(207), - MK(209), MK(211), MK(213), MK(215), MK(217), MK(219), MK(221), MK(223), - MK(225), MK(227), MK(229), MK(231), MK(233), MK(235), MK(237), MK(239), - MK(241), MK(243), MK(245), MK(247), MK(249), MK(251), MK(253), MK(127) +// range = ((range - 1) << kVP8Log2Range[range]) + 1 +const uint8_t kVP8NewRange[128] = { + 127, 127, 191, 127, 159, 191, 223, 127, + 143, 159, 175, 191, 207, 223, 239, 127, + 135, 143, 151, 159, 167, 175, 183, 191, + 199, 207, 215, 223, 231, 239, 247, 127, + 131, 135, 139, 143, 147, 151, 155, 159, + 163, 167, 171, 175, 179, 183, 187, 191, + 195, 199, 203, 207, 211, 215, 219, 223, + 227, 231, 235, 239, 243, 247, 251, 127, + 129, 131, 133, 135, 137, 139, 141, 143, + 145, 147, 149, 151, 153, 155, 157, 159, + 161, 163, 165, 167, 169, 171, 173, 175, + 177, 179, 181, 183, 185, 187, 189, 191, + 193, 195, 197, 199, 201, 203, 205, 207, + 209, 211, 213, 215, 217, 219, 221, 223, + 225, 227, 229, 231, 233, 235, 237, 239, + 241, 243, 245, 247, 249, 251, 253, 127 }; -#undef MK - void VP8LoadFinalBytes(VP8BitReader* const br) { assert(br != NULL && br->buf_ != NULL); // Only read 8bits at a time if (br->buf_ < br->buf_end_) { - br->value_ |= (bit_t)(*br->buf_++) << ((BITS) - 8 + br->missing_); - br->missing_ -= 8; - } else { + br->bits_ += 8; + br->value_ = (bit_t)(*br->buf_++) | (br->value_ << 8); + } else if (!br->eof_) { + br->value_ <<= 8; + br->bits_ += 8; br->eof_ = 1; + } else { + br->bits_ = 0; // This is to avoid undefined behaviour with shifts. } } @@ -97,32 +117,47 @@ int32_t VP8GetSignedValue(VP8BitReader* const br, int bits) { //------------------------------------------------------------------------------ // VP8LBitReader -#define MAX_NUM_BIT_READ 25 +#define VP8L_LOG8_WBITS 4 // Number of bytes needed to store VP8L_WBITS bits. -static const uint32_t kBitMask[MAX_NUM_BIT_READ] = { - 0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, - 65535, 131071, 262143, 524287, 1048575, 2097151, 4194303, 8388607, 16777215 +#if !defined(WEBP_FORCE_ALIGNED) && \ + (defined(__arm__) || defined(_M_ARM) || defined(__aarch64__) || \ + defined(__i386__) || defined(_M_IX86) || \ + defined(__x86_64__) || defined(_M_X64)) +#define VP8L_USE_UNALIGNED_LOAD +#endif + +static const uint32_t kBitMask[VP8L_MAX_NUM_BIT_READ + 1] = { + 0, + 0x000001, 0x000003, 0x000007, 0x00000f, + 0x00001f, 0x00003f, 0x00007f, 0x0000ff, + 0x0001ff, 0x0003ff, 0x0007ff, 0x000fff, + 0x001fff, 0x003fff, 0x007fff, 0x00ffff, + 0x01ffff, 0x03ffff, 0x07ffff, 0x0fffff, + 0x1fffff, 0x3fffff, 0x7fffff, 0xffffff }; -void VP8LInitBitReader(VP8LBitReader* const br, - const uint8_t* const start, +void VP8LInitBitReader(VP8LBitReader* const br, const uint8_t* const start, size_t length) { size_t i; + vp8l_val_t value = 0; assert(br != NULL); assert(start != NULL); assert(length < 0xfffffff8u); // can't happen with a RIFF chunk. - br->buf_ = start; br->len_ = length; br->val_ = 0; - br->pos_ = 0; br->bit_pos_ = 0; br->eos_ = 0; - br->error_ = 0; - for (i = 0; i < sizeof(br->val_) && i < br->len_; ++i) { - br->val_ |= ((uint64_t)br->buf_[br->pos_]) << (8 * i); - ++br->pos_; + + if (length > sizeof(br->val_)) { + length = sizeof(br->val_); + } + for (i = 0; i < length; ++i) { + value |= (vp8l_val_t)start[i] << (8 * i); } + br->val_ = value; + br->pos_ = length; + br->buf_ = start; } void VP8LBitReaderSetBuffer(VP8LBitReader* const br, @@ -130,100 +165,62 @@ void VP8LBitReaderSetBuffer(VP8LBitReader* const br, assert(br != NULL); assert(buf != NULL); assert(len < 0xfffffff8u); // can't happen with a RIFF chunk. - br->eos_ = (br->pos_ >= len); br->buf_ = buf; br->len_ = len; + // pos_ > len_ should be considered a param error. + br->eos_ = (br->pos_ > br->len_) || VP8LIsEndOfStream(br); +} + +static void VP8LSetEndOfStream(VP8LBitReader* const br) { + br->eos_ = 1; + br->bit_pos_ = 0; // To avoid undefined behaviour with shifts. } +// If not at EOS, reload up to VP8L_LBITS byte-by-byte static void ShiftBytes(VP8LBitReader* const br) { while (br->bit_pos_ >= 8 && br->pos_ < br->len_) { br->val_ >>= 8; - br->val_ |= ((uint64_t)br->buf_[br->pos_]) << 56; + br->val_ |= ((vp8l_val_t)br->buf_[br->pos_]) << (VP8L_LBITS - 8); ++br->pos_; br->bit_pos_ -= 8; } -} - -void VP8LFillBitWindow(VP8LBitReader* const br) { - if (br->bit_pos_ >= 32) { -#if defined(__x86_64__) || defined(_M_X64) - if (br->pos_ + 8 < br->len_) { - br->val_ >>= 32; - // The expression below needs a little-endian arch to work correctly. - // This gives a large speedup for decoding speed. - br->val_ |= *(const uint64_t *)(br->buf_ + br->pos_) << 32; - br->pos_ += 4; - br->bit_pos_ -= 32; - } else { - // Slow path. - ShiftBytes(br); - } -#else - // Always the slow path. - ShiftBytes(br); -#endif - } - if (br->pos_ == br->len_ && br->bit_pos_ == 64) { - br->eos_ = 1; + if (VP8LIsEndOfStream(br)) { + VP8LSetEndOfStream(br); } } -uint32_t VP8LReadOneBit(VP8LBitReader* const br) { - const uint32_t val = (br->val_ >> br->bit_pos_) & 1; - // Flag an error at end_of_stream. - if (!br->eos_) { - ++br->bit_pos_; - if (br->bit_pos_ >= 32) { - ShiftBytes(br); - } - // After this last bit is read, check if eos needs to be flagged. - if (br->pos_ == br->len_ && br->bit_pos_ == 64) { - br->eos_ = 1; - } - } else { - br->error_ = 1; +void VP8LDoFillBitWindow(VP8LBitReader* const br) { + assert(br->bit_pos_ >= VP8L_WBITS); + // TODO(jzern): given the fixed read size it may be possible to force + // alignment in this block. +#if defined(VP8L_USE_UNALIGNED_LOAD) + if (br->pos_ + sizeof(br->val_) < br->len_) { + br->val_ >>= VP8L_WBITS; + br->bit_pos_ -= VP8L_WBITS; + // The expression below needs a little-endian arch to work correctly. + // This gives a large speedup for decoding speed. + br->val_ |= (vp8l_val_t)*(const uint32_t*)(br->buf_ + br->pos_) << + (VP8L_LBITS - VP8L_WBITS); + br->pos_ += VP8L_LOG8_WBITS; + return; } - return val; +#endif + ShiftBytes(br); // Slow path. } uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits) { - uint32_t val = 0; assert(n_bits >= 0); // Flag an error if end_of_stream or n_bits is more than allowed limit. - if (!br->eos_ && n_bits < MAX_NUM_BIT_READ) { - // If this read is going to cross the read buffer, set the eos flag. - if (br->pos_ == br->len_) { - if ((br->bit_pos_ + n_bits) >= 64) { - br->eos_ = 1; - if ((br->bit_pos_ + n_bits) > 64) return val; - } - } - val = (br->val_ >> br->bit_pos_) & kBitMask[n_bits]; - br->bit_pos_ += n_bits; - if (br->bit_pos_ >= 40) { - if (br->pos_ + 5 < br->len_) { - br->val_ >>= 40; - br->val_ |= - (((uint64_t)br->buf_[br->pos_ + 0]) << 24) | - (((uint64_t)br->buf_[br->pos_ + 1]) << 32) | - (((uint64_t)br->buf_[br->pos_ + 2]) << 40) | - (((uint64_t)br->buf_[br->pos_ + 3]) << 48) | - (((uint64_t)br->buf_[br->pos_ + 4]) << 56); - br->pos_ += 5; - br->bit_pos_ -= 40; - } - if (br->bit_pos_ >= 8) { - ShiftBytes(br); - } - } + if (!br->eos_ && n_bits <= VP8L_MAX_NUM_BIT_READ) { + const uint32_t val = VP8LPrefetchBits(br) & kBitMask[n_bits]; + const int new_bits = br->bit_pos_ + n_bits; + br->bit_pos_ = new_bits; + ShiftBytes(br); + return val; } else { - br->error_ = 1; + VP8LSetEndOfStream(br); + return 0; } - return val; } //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/utils/bit_reader.h b/drivers/webp/utils/bit_reader.h index 43cd948fd4..0fc62d33b7 100644 --- a/drivers/webp/utils/bit_reader.h +++ b/drivers/webp/utils/bit_reader.h @@ -1,9 +1,10 @@ -// // Copyright 2010 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Boolean decoder @@ -18,44 +19,75 @@ #ifdef _MSC_VER #include <stdlib.h> // _byteswap_ulong #endif -#include <string.h> // For memcpy -#include "../types.h" +#include "../webp/types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -#define BITS 32 // can be 32, 16 or 8 -#define MASK ((((bit_t)1) << (BITS)) - 1) -#if (BITS == 32) -typedef uint64_t bit_t; // natural register type -typedef uint32_t lbit_t; // natural type for memory I/O -#elif (BITS == 16) -typedef uint32_t bit_t; -typedef uint16_t lbit_t; +// The Boolean decoder needs to maintain infinite precision on the value_ field. +// However, since range_ is only 8bit, we only need an active window of 8 bits +// for value_. Left bits (MSB) gets zeroed and shifted away when value_ falls +// below 128, range_ is updated, and fresh bits read from the bitstream are +// brought in as LSB. To avoid reading the fresh bits one by one (slow), we +// cache BITS of them ahead. The total of (BITS + 8) bits must fit into a +// natural register (with type bit_t). To fetch BITS bits from bitstream we +// use a type lbit_t. +// +// BITS can be any multiple of 8 from 8 to 56 (inclusive). +// Pick values that fit natural register size. + +#if defined(__i386__) || defined(_M_IX86) // x86 32bit +#define BITS 24 +#elif defined(__x86_64__) || defined(_M_X64) // x86 64bit +#define BITS 56 +#elif defined(__arm__) || defined(_M_ARM) // ARM +#define BITS 24 +#elif defined(__mips__) // MIPS +#define BITS 24 +#else // reasonable default +#define BITS 24 // TODO(skal): test aarch64 and find the proper BITS value. +#endif + +//------------------------------------------------------------------------------ +// Derived types and constants: +// bit_t = natural register type for storing 'value_' (which is BITS+8 bits) +// range_t = register for 'range_' (which is 8bits only) + +#if (BITS > 24) +typedef uint64_t bit_t; #else typedef uint32_t bit_t; -typedef uint8_t lbit_t; #endif +typedef uint32_t range_t; + //------------------------------------------------------------------------------ -// Bitreader and code-tree reader +// Bitreader typedef struct VP8BitReader VP8BitReader; struct VP8BitReader { + // boolean decoder (keep the field ordering as is!) + bit_t value_; // current value + range_t range_; // current range minus 1. In [127, 254] interval. + int bits_; // number of valid bits left + // read buffer const uint8_t* buf_; // next byte to be read const uint8_t* buf_end_; // end of read buffer + const uint8_t* buf_max_; // max packed-read position on buffer int eof_; // true if input is exhausted - - // boolean decoder - bit_t range_; // current range minus 1. In [127, 254] interval. - bit_t value_; // current value - int missing_; // number of missing bits in value_ (8bit) }; // Initialize the bit reader and the boolean decoder. void VP8InitBitReader(VP8BitReader* const br, - const uint8_t* const start, const uint8_t* const end); + const uint8_t* const start, size_t size); +// Sets the working read buffer. +void VP8BitReaderSetBuffer(VP8BitReader* const br, + const uint8_t* const start, size_t size); + +// Update internal pointers to displace the byte buffer by the +// relative offset 'offset'. +void VP8RemapBitReader(VP8BitReader* const br, ptrdiff_t offset); // return the next value made of 'num_bits' bits uint32_t VP8GetValue(VP8BitReader* const br, int num_bits); @@ -66,100 +98,31 @@ static WEBP_INLINE uint32_t VP8Get(VP8BitReader* const br) { // return the next value with sign-extension. int32_t VP8GetSignedValue(VP8BitReader* const br, int num_bits); -// Read a bit with proba 'prob'. Speed-critical function! -extern const uint8_t kVP8Log2Range[128]; -extern const bit_t kVP8NewRange[128]; - -void VP8LoadFinalBytes(VP8BitReader* const br); // special case for the tail - -static WEBP_INLINE void VP8LoadNewBytes(VP8BitReader* const br) { - assert(br && br->buf_); - // Read 'BITS' bits at a time if possible. - if (br->buf_ + sizeof(lbit_t) <= br->buf_end_) { - // convert memory type to register type (with some zero'ing!) - bit_t bits; - lbit_t in_bits = *(lbit_t*)br->buf_; - br->buf_ += (BITS) >> 3; -#if !defined(__BIG_ENDIAN__) -#if (BITS == 32) -#if defined(__i386__) || defined(__x86_64__) - __asm__ volatile("bswap %k0" : "=r"(in_bits) : "0"(in_bits)); - bits = (bit_t)in_bits; // 32b -> 64b zero-extension -#elif defined(_MSC_VER) - bits = _byteswap_ulong(in_bits); -#else - bits = (bit_t)(in_bits >> 24) | ((in_bits >> 8) & 0xff00) - | ((in_bits << 8) & 0xff0000) | (in_bits << 24); -#endif // x86 -#elif (BITS == 16) - // gcc will recognize a 'rorw $8, ...' here: - bits = (bit_t)(in_bits >> 8) | ((in_bits & 0xff) << 8); -#endif -#else // LITTLE_ENDIAN - bits = (bit_t)in_bits; -#endif - br->value_ |= bits << br->missing_; - br->missing_ -= (BITS); - } else { - VP8LoadFinalBytes(br); // no need to be inlined - } -} +// bit_reader_inl.h will implement the following methods: +// static WEBP_INLINE int VP8GetBit(VP8BitReader* const br, int prob) +// static WEBP_INLINE int VP8GetSigned(VP8BitReader* const br, int v) +// and should be included by the .c files that actually need them. +// This is to avoid recompiling the whole library whenever this file is touched, +// and also allowing platform-specific ad-hoc hacks. -static WEBP_INLINE int VP8BitUpdate(VP8BitReader* const br, bit_t split) { - const bit_t value_split = split | (MASK); - if (br->missing_ > 0) { // Make sure we have a least BITS bits in 'value_' - VP8LoadNewBytes(br); - } - if (br->value_ > value_split) { - br->range_ -= value_split + 1; - br->value_ -= value_split + 1; - return 1; - } else { - br->range_ = value_split; - return 0; - } -} - -static WEBP_INLINE void VP8Shift(VP8BitReader* const br) { - // range_ is in [0..127] interval here. - const int idx = br->range_ >> (BITS); - const int shift = kVP8Log2Range[idx]; - br->range_ = kVP8NewRange[idx]; - br->value_ <<= shift; - br->missing_ += shift; -} - -static WEBP_INLINE int VP8GetBit(VP8BitReader* const br, int prob) { - // It's important to avoid generating a 64bit x 64bit multiply here. - // We just need an 8b x 8b after all. - const bit_t split = - (bit_t)((uint32_t)(br->range_ >> (BITS)) * prob) << ((BITS) - 8); - const int bit = VP8BitUpdate(br, split); - if (br->range_ <= (((bit_t)0x7e << (BITS)) | (MASK))) { - VP8Shift(br); - } - return bit; -} +// ----------------------------------------------------------------------------- +// Bitreader for lossless format -static WEBP_INLINE int VP8GetSigned(VP8BitReader* const br, int v) { - const bit_t split = (br->range_ >> 1); - const int bit = VP8BitUpdate(br, split); - VP8Shift(br); - return bit ? -v : v; -} +// maximum number of bits (inclusive) the bit-reader can handle: +#define VP8L_MAX_NUM_BIT_READ 24 +#define VP8L_LBITS 64 // Number of bits prefetched (= bit-size of vp8l_val_t). +#define VP8L_WBITS 32 // Minimum number of bytes ready after VP8LFillBitWindow. -// ----------------------------------------------------------------------------- -// Bitreader +typedef uint64_t vp8l_val_t; // right now, this bit-reader can only use 64bit. typedef struct { - uint64_t val_; - const uint8_t* buf_; - size_t len_; - size_t pos_; - int bit_pos_; - int eos_; - int error_; + vp8l_val_t val_; // pre-fetched bits + const uint8_t* buf_; // input byte buffer + size_t len_; // buffer length + size_t pos_; // byte position in buf_ + int bit_pos_; // current bit-reading position in val_ + int eos_; // true if a bit was read past the end of buffer } VP8LBitReader; void VP8LInitBitReader(VP8LBitReader* const br, @@ -170,28 +133,39 @@ void VP8LInitBitReader(VP8LBitReader* const br, void VP8LBitReaderSetBuffer(VP8LBitReader* const br, const uint8_t* const buffer, size_t length); -// Reads the specified number of bits from Read Buffer. -// Flags an error in case end_of_stream or n_bits is more than allowed limit. -// Flags eos if this read attempt is going to cross the read buffer. +// Reads the specified number of bits from read buffer. +// Flags an error in case end_of_stream or n_bits is more than the allowed limit +// of VP8L_MAX_NUM_BIT_READ (inclusive). +// Flags eos_ if this read attempt is going to cross the read buffer. uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits); -// Reads one bit from Read Buffer. Flags an error in case end_of_stream. -// Flags eos after reading last bit from the buffer. -uint32_t VP8LReadOneBit(VP8LBitReader* const br); - -// VP8LReadOneBitUnsafe is faster than VP8LReadOneBit, but it can be called only -// 32 times after the last VP8LFillBitWindow. Any subsequent calls -// (without VP8LFillBitWindow) will return invalid data. -static WEBP_INLINE uint32_t VP8LReadOneBitUnsafe(VP8LBitReader* const br) { - const uint32_t val = (br->val_ >> br->bit_pos_) & 1; - ++br->bit_pos_; - return val; +// Return the prefetched bits, so they can be looked up. +static WEBP_INLINE uint32_t VP8LPrefetchBits(VP8LBitReader* const br) { + return (uint32_t)(br->val_ >> (br->bit_pos_ & (VP8L_LBITS - 1))); +} + +// Returns true if there was an attempt at reading bit past the end of +// the buffer. Doesn't set br->eos_ flag. +static WEBP_INLINE int VP8LIsEndOfStream(const VP8LBitReader* const br) { + assert(br->pos_ <= br->len_); + return br->eos_ || ((br->pos_ == br->len_) && (br->bit_pos_ > VP8L_LBITS)); } -// Advances the Read buffer by 4 bytes to make room for reading next 32 bits. -void VP8LFillBitWindow(VP8LBitReader* const br); +// For jumping over a number of bits in the bit stream when accessed with +// VP8LPrefetchBits and VP8LFillBitWindow. +static WEBP_INLINE void VP8LSetBitPos(VP8LBitReader* const br, int val) { + br->bit_pos_ = val; + br->eos_ = VP8LIsEndOfStream(br); +} + +// Advances the read buffer by 4 bytes to make room for reading next 32 bits. +// Speed critical, but infrequent part of the code can be non-inlined. +extern void VP8LDoFillBitWindow(VP8LBitReader* const br); +static WEBP_INLINE void VP8LFillBitWindow(VP8LBitReader* const br) { + if (br->bit_pos_ >= VP8L_WBITS) VP8LDoFillBitWindow(br); +} -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/utils/bit_writer.c b/drivers/webp/utils/bit_writer.c index 671159cacd..064428691b 100644 --- a/drivers/webp/utils/bit_writer.c +++ b/drivers/webp/utils/bit_writer.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Bit writing and boolean coder @@ -13,11 +15,10 @@ #include <assert.h> #include <string.h> // for memcpy() #include <stdlib.h> -#include "./bit_writer.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "./bit_writer.h" +#include "./endian_inl.h" +#include "./utils.h" //------------------------------------------------------------------------------ // VP8BitWriter @@ -36,19 +37,22 @@ static int BitWriterResize(VP8BitWriter* const bw, size_t extra_size) { new_size = 2 * bw->max_pos_; if (new_size < needed_size) new_size = needed_size; if (new_size < 1024) new_size = 1024; - new_buf = (uint8_t*)malloc(new_size); + new_buf = (uint8_t*)WebPSafeMalloc(1ULL, new_size); if (new_buf == NULL) { bw->error_ = 1; return 0; } - memcpy(new_buf, bw->buf_, bw->pos_); - free(bw->buf_); + if (bw->pos_ > 0) { + assert(bw->buf_ != NULL); + memcpy(new_buf, bw->buf_, bw->pos_); + } + WebPSafeFree(bw->buf_); bw->buf_ = new_buf; bw->max_pos_ = new_size; return 1; } -static void kFlush(VP8BitWriter* const bw) { +static void Flush(VP8BitWriter* const bw) { const int s = 8 + bw->nb_bits_; const int32_t bits = bw->value_ >> s; assert(bw->nb_bits_ >= 0); @@ -114,7 +118,7 @@ int VP8PutBit(VP8BitWriter* const bw, int bit, int prob) { bw->range_ = kNewRange[bw->range_]; bw->value_ <<= shift; bw->nb_bits_ += shift; - if (bw->nb_bits_ > 0) kFlush(bw); + if (bw->nb_bits_ > 0) Flush(bw); } return bit; } @@ -131,24 +135,25 @@ int VP8PutBitUniform(VP8BitWriter* const bw, int bit) { bw->range_ = kNewRange[bw->range_]; bw->value_ <<= 1; bw->nb_bits_ += 1; - if (bw->nb_bits_ > 0) kFlush(bw); + if (bw->nb_bits_ > 0) Flush(bw); } return bit; } -void VP8PutValue(VP8BitWriter* const bw, int value, int nb_bits) { - int mask; - for (mask = 1 << (nb_bits - 1); mask; mask >>= 1) +void VP8PutBits(VP8BitWriter* const bw, uint32_t value, int nb_bits) { + uint32_t mask; + assert(nb_bits > 0 && nb_bits < 32); + for (mask = 1u << (nb_bits - 1); mask; mask >>= 1) VP8PutBitUniform(bw, value & mask); } -void VP8PutSignedValue(VP8BitWriter* const bw, int value, int nb_bits) { +void VP8PutSignedBits(VP8BitWriter* const bw, int value, int nb_bits) { if (!VP8PutBitUniform(bw, value != 0)) return; if (value < 0) { - VP8PutValue(bw, ((-value) << 1) | 1, nb_bits + 1); + VP8PutBits(bw, ((-value) << 1) | 1, nb_bits + 1); } else { - VP8PutValue(bw, value << 1, nb_bits + 1); + VP8PutBits(bw, value << 1, nb_bits + 1); } } @@ -167,16 +172,16 @@ int VP8BitWriterInit(VP8BitWriter* const bw, size_t expected_size) { } uint8_t* VP8BitWriterFinish(VP8BitWriter* const bw) { - VP8PutValue(bw, 0, 9 - bw->nb_bits_); + VP8PutBits(bw, 0, 9 - bw->nb_bits_); bw->nb_bits_ = 0; // pad with zeroes - kFlush(bw); + Flush(bw); return bw->buf_; } int VP8BitWriterAppend(VP8BitWriter* const bw, const uint8_t* data, size_t size) { - assert(data); - if (bw->nb_bits_ != -8) return 0; // kFlush() must have been called + assert(data != NULL); + if (bw->nb_bits_ != -8) return 0; // Flush() must have been called if (!BitWriterResize(bw, size)) return 0; memcpy(bw->buf_ + bw->pos_, data, size); bw->pos_ += size; @@ -184,8 +189,8 @@ int VP8BitWriterAppend(VP8BitWriter* const bw, } void VP8BitWriterWipeOut(VP8BitWriter* const bw) { - if (bw) { - free(bw->buf_); + if (bw != NULL) { + WebPSafeFree(bw->buf_); memset(bw, 0, sizeof(*bw)); } } @@ -193,32 +198,39 @@ void VP8BitWriterWipeOut(VP8BitWriter* const bw) { //------------------------------------------------------------------------------ // VP8LBitWriter +// This is the minimum amount of size the memory buffer is guaranteed to grow +// when extra space is needed. +#define MIN_EXTRA_SIZE (32768ULL) + // Returns 1 on success. static int VP8LBitWriterResize(VP8LBitWriter* const bw, size_t extra_size) { uint8_t* allocated_buf; size_t allocated_size; - const size_t current_size = VP8LBitWriterNumBytes(bw); + const size_t max_bytes = bw->end_ - bw->buf_; + const size_t current_size = bw->cur_ - bw->buf_; const uint64_t size_required_64b = (uint64_t)current_size + extra_size; const size_t size_required = (size_t)size_required_64b; if (size_required != size_required_64b) { bw->error_ = 1; return 0; } - if (bw->max_bytes_ > 0 && size_required <= bw->max_bytes_) return 1; - allocated_size = (3 * bw->max_bytes_) >> 1; + if (max_bytes > 0 && size_required <= max_bytes) return 1; + allocated_size = (3 * max_bytes) >> 1; if (allocated_size < size_required) allocated_size = size_required; // make allocated size multiple of 1k allocated_size = (((allocated_size >> 10) + 1) << 10); - allocated_buf = (uint8_t*)malloc(allocated_size); + allocated_buf = (uint8_t*)WebPSafeMalloc(1ULL, allocated_size); if (allocated_buf == NULL) { bw->error_ = 1; return 0; } - memcpy(allocated_buf, bw->buf_, current_size); - free(bw->buf_); + if (current_size > 0) { + memcpy(allocated_buf, bw->buf_, current_size); + } + WebPSafeFree(bw->buf_); bw->buf_ = allocated_buf; - bw->max_bytes_ = allocated_size; - memset(allocated_buf + current_size, 0, allocated_size - current_size); + bw->cur_ = bw->buf_ + current_size; + bw->end_ = bw->buf_ + allocated_size; return 1; } @@ -227,58 +239,81 @@ int VP8LBitWriterInit(VP8LBitWriter* const bw, size_t expected_size) { return VP8LBitWriterResize(bw, expected_size); } -void VP8LBitWriterDestroy(VP8LBitWriter* const bw) { +void VP8LBitWriterWipeOut(VP8LBitWriter* const bw) { if (bw != NULL) { - free(bw->buf_); + WebPSafeFree(bw->buf_); memset(bw, 0, sizeof(*bw)); } } -void VP8LWriteBits(VP8LBitWriter* const bw, int n_bits, uint32_t bits) { - if (n_bits < 1) return; -#if !defined(__BIG_ENDIAN__) - // Technically, this branch of the code can write up to 25 bits at a time, - // but in prefix encoding, the maximum number of bits written is 18 at a time. - { - uint8_t* const p = &bw->buf_[bw->bit_pos_ >> 3]; - uint32_t v = *(const uint32_t*)p; - v |= bits << (bw->bit_pos_ & 7); - *(uint32_t*)p = v; - bw->bit_pos_ += n_bits; +void VP8LPutBitsFlushBits(VP8LBitWriter* const bw) { + // If needed, make some room by flushing some bits out. + if (bw->cur_ + VP8L_WRITER_BYTES > bw->end_) { + const uint64_t extra_size = (bw->end_ - bw->buf_) + MIN_EXTRA_SIZE; + if (extra_size != (size_t)extra_size || + !VP8LBitWriterResize(bw, (size_t)extra_size)) { + bw->cur_ = bw->buf_; + bw->error_ = 1; + return; + } } -#else // BIG_ENDIAN - { - uint8_t* p = &bw->buf_[bw->bit_pos_ >> 3]; - const int bits_reserved_in_first_byte = bw->bit_pos_ & 7; - const int bits_left_to_write = n_bits - 8 + bits_reserved_in_first_byte; - // implicit & 0xff is assumed for uint8_t arithmetics - *p++ |= bits << bits_reserved_in_first_byte; - bits >>= 8 - bits_reserved_in_first_byte; - if (bits_left_to_write >= 1) { - *p++ = bits; - bits >>= 8; - if (bits_left_to_write >= 9) { - *p++ = bits; - bits >>= 8; + *(vp8l_wtype_t*)bw->cur_ = (vp8l_wtype_t)WSWAP((vp8l_wtype_t)bw->bits_); + bw->cur_ += VP8L_WRITER_BYTES; + bw->bits_ >>= VP8L_WRITER_BITS; + bw->used_ -= VP8L_WRITER_BITS; +} + +void VP8LPutBitsInternal(VP8LBitWriter* const bw, uint32_t bits, int n_bits) { + assert(n_bits <= 32); + // That's the max we can handle: + assert(sizeof(vp8l_wtype_t) == 2); + if (n_bits > 0) { + vp8l_atype_t lbits = bw->bits_; + int used = bw->used_; + // Special case of overflow handling for 32bit accumulator (2-steps flush). +#if VP8L_WRITER_BITS == 16 + if (used + n_bits >= VP8L_WRITER_MAX_BITS) { + // Fill up all the VP8L_WRITER_MAX_BITS so it can be flushed out below. + const int shift = VP8L_WRITER_MAX_BITS - used; + lbits |= (vp8l_atype_t)bits << used; + used = VP8L_WRITER_MAX_BITS; + n_bits -= shift; + bits >>= shift; + assert(n_bits <= VP8L_WRITER_MAX_BITS); + } +#endif + // If needed, make some room by flushing some bits out. + while (used >= VP8L_WRITER_BITS) { + if (bw->cur_ + VP8L_WRITER_BYTES > bw->end_) { + const uint64_t extra_size = (bw->end_ - bw->buf_) + MIN_EXTRA_SIZE; + if (extra_size != (size_t)extra_size || + !VP8LBitWriterResize(bw, (size_t)extra_size)) { + bw->cur_ = bw->buf_; + bw->error_ = 1; + return; + } } + *(vp8l_wtype_t*)bw->cur_ = (vp8l_wtype_t)WSWAP((vp8l_wtype_t)lbits); + bw->cur_ += VP8L_WRITER_BYTES; + lbits >>= VP8L_WRITER_BITS; + used -= VP8L_WRITER_BITS; } - assert(n_bits <= 25); - *p = bits; - bw->bit_pos_ += n_bits; + bw->bits_ = lbits | ((vp8l_atype_t)bits << used); + bw->used_ = used + n_bits; } -#endif - if ((bw->bit_pos_ >> 3) > (bw->max_bytes_ - 8)) { - const uint64_t extra_size = 32768ULL + bw->max_bytes_; - if (extra_size != (size_t)extra_size || - !VP8LBitWriterResize(bw, (size_t)extra_size)) { - bw->bit_pos_ = 0; - bw->error_ = 1; +} + +uint8_t* VP8LBitWriterFinish(VP8LBitWriter* const bw) { + // flush leftover bits + if (VP8LBitWriterResize(bw, (bw->used_ + 7) >> 3)) { + while (bw->used_ > 0) { + *bw->cur_++ = (uint8_t)bw->bits_; + bw->bits_ >>= 8; + bw->used_ -= 8; } + bw->used_ = 0; } + return bw->buf_; } //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/utils/bit_writer.h b/drivers/webp/utils/bit_writer.h index 57f39b11b1..ef360d1dc6 100644 --- a/drivers/webp/utils/bit_writer.h +++ b/drivers/webp/utils/bit_writer.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Bit writing and boolean coder @@ -12,9 +14,9 @@ #ifndef WEBP_UTILS_BIT_WRITER_H_ #define WEBP_UTILS_BIT_WRITER_H_ -#include "../types.h" +#include "../webp/types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -43,8 +45,8 @@ void VP8BitWriterWipeOut(VP8BitWriter* const bw); int VP8PutBit(VP8BitWriter* const bw, int bit, int prob); int VP8PutBitUniform(VP8BitWriter* const bw, int bit); -void VP8PutValue(VP8BitWriter* const bw, int value, int nb_bits); -void VP8PutSignedValue(VP8BitWriter* const bw, int value, int nb_bits); +void VP8PutBits(VP8BitWriter* const bw, uint32_t value, int nb_bits); +void VP8PutSignedBits(VP8BitWriter* const bw, int value, int nb_bits); // Appends some bytes to the internal buffer. Data is copied. int VP8BitWriterAppend(VP8BitWriter* const bw, @@ -66,57 +68,77 @@ static WEBP_INLINE size_t VP8BitWriterSize(const VP8BitWriter* const bw) { //------------------------------------------------------------------------------ // VP8LBitWriter -// TODO(vikasa): VP8LBitWriter is copied as-is from lossless code. There's scope -// of re-using VP8BitWriter. Will evaluate once basic lossless encoder is -// implemented. -typedef struct { - uint8_t* buf_; - size_t bit_pos_; - size_t max_bytes_; +#if defined(__x86_64__) || defined(_M_X64) // 64bit +typedef uint64_t vp8l_atype_t; // accumulator type +typedef uint32_t vp8l_wtype_t; // writing type +#define WSWAP HToLE32 +#define VP8L_WRITER_BYTES 4 // sizeof(vp8l_wtype_t) +#define VP8L_WRITER_BITS 32 // 8 * sizeof(vp8l_wtype_t) +#define VP8L_WRITER_MAX_BITS 64 // 8 * sizeof(vp8l_atype_t) +#else +typedef uint32_t vp8l_atype_t; +typedef uint16_t vp8l_wtype_t; +#define WSWAP HToLE16 +#define VP8L_WRITER_BYTES 2 +#define VP8L_WRITER_BITS 16 +#define VP8L_WRITER_MAX_BITS 32 +#endif - // After all bits are written, the caller must observe the state of - // error_. A value of 1 indicates that a memory allocation failure - // has happened during bit writing. A value of 0 indicates successful +typedef struct { + vp8l_atype_t bits_; // bit accumulator + int used_; // number of bits used in accumulator + uint8_t* buf_; // start of buffer + uint8_t* cur_; // current write position + uint8_t* end_; // end of buffer + + // After all bits are written (VP8LBitWriterFinish()), the caller must observe + // the state of error_. A value of 1 indicates that a memory allocation + // failure has happened during bit writing. A value of 0 indicates successful // writing of bits. int error_; } VP8LBitWriter; static WEBP_INLINE size_t VP8LBitWriterNumBytes(VP8LBitWriter* const bw) { - return (bw->bit_pos_ + 7) >> 3; -} - -static WEBP_INLINE uint8_t* VP8LBitWriterFinish(VP8LBitWriter* const bw) { - return bw->buf_; + return (bw->cur_ - bw->buf_) + ((bw->used_ + 7) >> 3); } -// Returns 0 in case of memory allocation error. +// Returns false in case of memory allocation error. int VP8LBitWriterInit(VP8LBitWriter* const bw, size_t expected_size); +// Finalize the bitstream coding. Returns a pointer to the internal buffer. +uint8_t* VP8LBitWriterFinish(VP8LBitWriter* const bw); +// Release any pending memory and zeroes the object. +void VP8LBitWriterWipeOut(VP8LBitWriter* const bw); -void VP8LBitWriterDestroy(VP8LBitWriter* const bw); +// Internal function for VP8LPutBits flushing 32 bits from the written state. +void VP8LPutBitsFlushBits(VP8LBitWriter* const bw); -// This function writes bits into bytes in increasing addresses, and within -// a byte least-significant-bit first. -// -// The function can write up to 16 bits in one go with WriteBits -// Example: let's assume that 3 bits (Rs below) have been written already: -// -// BYTE-0 BYTE+1 BYTE+2 -// -// 0000 0RRR 0000 0000 0000 0000 -// -// Now, we could write 5 or less bits in MSB by just sifting by 3 -// and OR'ing to BYTE-0. -// -// For n bits, we take the last 5 bytes, OR that with high bits in BYTE-0, -// and locate the rest in BYTE+1 and BYTE+2. -// +// PutBits internal function used in the 16 bit vp8l_wtype_t case. +void VP8LPutBitsInternal(VP8LBitWriter* const bw, uint32_t bits, int n_bits); + +// This function writes bits into bytes in increasing addresses (little endian), +// and within a byte least-significant-bit first. +// This function can write up to 32 bits in one go, but VP8LBitReader can only +// read 24 bits max (VP8L_MAX_NUM_BIT_READ). // VP8LBitWriter's error_ flag is set in case of memory allocation error. -void VP8LWriteBits(VP8LBitWriter* const bw, int n_bits, uint32_t bits); +static WEBP_INLINE void VP8LPutBits(VP8LBitWriter* const bw, + uint32_t bits, int n_bits) { + if (sizeof(vp8l_wtype_t) == 4) { + if (n_bits > 0) { + if (bw->used_ >= 32) { + VP8LPutBitsFlushBits(bw); + } + bw->bits_ |= (vp8l_atype_t)bits << bw->used_; + bw->used_ += n_bits; + } + } else { + VP8LPutBitsInternal(bw, bits, n_bits); + } +} //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/utils/color_cache.c b/drivers/webp/utils/color_cache.c index 560f81db10..f9ff4b5451 100644 --- a/drivers/webp/utils/color_cache.c +++ b/drivers/webp/utils/color_cache.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Color Cache for WebP Lossless @@ -11,13 +13,10 @@ #include <assert.h> #include <stdlib.h> +#include <string.h> #include "./color_cache.h" #include "../utils/utils.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // VP8LColorCache. @@ -29,16 +28,22 @@ int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) { sizeof(*cc->colors_)); if (cc->colors_ == NULL) return 0; cc->hash_shift_ = 32 - hash_bits; + cc->hash_bits_ = hash_bits; return 1; } void VP8LColorCacheClear(VP8LColorCache* const cc) { if (cc != NULL) { - free(cc->colors_); + WebPSafeFree(cc->colors_); cc->colors_ = NULL; } } -#if defined(__cplusplus) || defined(c_plusplus) +void VP8LColorCacheCopy(const VP8LColorCache* const src, + VP8LColorCache* const dst) { + assert(src != NULL); + assert(dst != NULL); + assert(src->hash_bits_ == dst->hash_bits_); + memcpy(dst->colors_, src->colors_, + ((size_t)1u << dst->hash_bits_) * sizeof(*dst->colors_)); } -#endif diff --git a/drivers/webp/utils/color_cache.h b/drivers/webp/utils/color_cache.h index da5e260195..a9a9f64270 100644 --- a/drivers/webp/utils/color_cache.h +++ b/drivers/webp/utils/color_cache.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Color Cache for WebP Lossless @@ -13,26 +15,33 @@ #ifndef WEBP_UTILS_COLOR_CACHE_H_ #define WEBP_UTILS_COLOR_CACHE_H_ -#include "../types.h" +#include "../webp/types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif // Main color cache struct. typedef struct { uint32_t *colors_; // color entries - int hash_shift_; // Hash shift: 32 - hash_bits. + int hash_shift_; // Hash shift: 32 - hash_bits_. + int hash_bits_; } VP8LColorCache; static const uint32_t kHashMul = 0x1e35a7bd; static WEBP_INLINE uint32_t VP8LColorCacheLookup( const VP8LColorCache* const cc, uint32_t key) { - assert(key <= (~0U >> cc->hash_shift_)); + assert((key >> cc->hash_bits_) == 0u); return cc->colors_[key]; } +static WEBP_INLINE void VP8LColorCacheSet(const VP8LColorCache* const cc, + uint32_t key, uint32_t argb) { + assert((key >> cc->hash_bits_) == 0u); + cc->colors_[key] = argb; +} + static WEBP_INLINE void VP8LColorCacheInsert(const VP8LColorCache* const cc, uint32_t argb) { const uint32_t key = (kHashMul * argb) >> cc->hash_shift_; @@ -47,7 +56,7 @@ static WEBP_INLINE int VP8LColorCacheGetIndex(const VP8LColorCache* const cc, static WEBP_INLINE int VP8LColorCacheContains(const VP8LColorCache* const cc, uint32_t argb) { const uint32_t key = (kHashMul * argb) >> cc->hash_shift_; - return cc->colors_[key] == argb; + return (cc->colors_[key] == argb); } //------------------------------------------------------------------------------ @@ -56,12 +65,15 @@ static WEBP_INLINE int VP8LColorCacheContains(const VP8LColorCache* const cc, // Returns false in case of memory error. int VP8LColorCacheInit(VP8LColorCache* const color_cache, int hash_bits); +void VP8LColorCacheCopy(const VP8LColorCache* const src, + VP8LColorCache* const dst); + // Delete the memory associated to color cache. void VP8LColorCacheClear(VP8LColorCache* const color_cache); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } #endif diff --git a/drivers/webp/utils/filters.c b/drivers/webp/utils/filters.c index 08f52a3d20..15543b1271 100644 --- a/drivers/webp/utils/filters.c +++ b/drivers/webp/utils/filters.c @@ -1,171 +1,37 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // -// Spatial prediction using various filters +// filter estimation // // Author: Urvang (urvang@google.com) #include "./filters.h" -#include <assert.h> #include <stdlib.h> #include <string.h> -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -//------------------------------------------------------------------------------ -// Helpful macro. - -# define SANITY_CHECK(in, out) \ - assert(in != NULL); \ - assert(out != NULL); \ - assert(width > 0); \ - assert(height > 0); \ - assert(bpp > 0); \ - assert(stride >= width * bpp); - -static WEBP_INLINE void PredictLine(const uint8_t* src, const uint8_t* pred, - uint8_t* dst, int length, int inverse) { - int i; - if (inverse) { - for (i = 0; i < length; ++i) dst[i] = src[i] + pred[i]; - } else { - for (i = 0; i < length; ++i) dst[i] = src[i] - pred[i]; - } -} - -//------------------------------------------------------------------------------ -// Horizontal filter. - -static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in, - int width, int height, int bpp, int stride, int inverse, uint8_t* out) { - int h; - const uint8_t* preds = (inverse ? out : in); - SANITY_CHECK(in, out); - - // Filter line-by-line. - for (h = 0; h < height; ++h) { - // Leftmost pixel is predicted from above (except for topmost scanline). - if (h == 0) { - memcpy((void*)out, (const void*)in, bpp); - } else { - PredictLine(in, preds - stride, out, bpp, inverse); - } - PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); - preds += stride; - in += stride; - out += stride; - } -} - -static void HorizontalFilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* filtered_data) { - DoHorizontalFilter(data, width, height, bpp, stride, 0, filtered_data); -} - -static void HorizontalUnfilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* recon_data) { - DoHorizontalFilter(data, width, height, bpp, stride, 1, recon_data); -} - -//------------------------------------------------------------------------------ -// Vertical filter. - -static WEBP_INLINE void DoVerticalFilter(const uint8_t* in, - int width, int height, int bpp, int stride, int inverse, uint8_t* out) { - int h; - const uint8_t* preds = (inverse ? out : in); - SANITY_CHECK(in, out); - - // Very first top-left pixel is copied. - memcpy((void*)out, (const void*)in, bpp); - // Rest of top scan-line is left-predicted. - PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); - - // Filter line-by-line. - for (h = 1; h < height; ++h) { - in += stride; - out += stride; - PredictLine(in, preds, out, bpp * width, inverse); - preds += stride; - } -} - -static void VerticalFilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* filtered_data) { - DoVerticalFilter(data, width, height, bpp, stride, 0, filtered_data); -} - -static void VerticalUnfilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* recon_data) { - DoVerticalFilter(data, width, height, bpp, stride, 1, recon_data); -} +// ----------------------------------------------------------------------------- +// Quick estimate of a potentially interesting filter mode to try. -//------------------------------------------------------------------------------ -// Gradient filter. +#define SMAX 16 +#define SDIFF(a, b) (abs((a) - (b)) >> 4) // Scoring diff, in [0..SMAX) static WEBP_INLINE int GradientPredictor(uint8_t a, uint8_t b, uint8_t c) { const int g = a + b - c; - return (g < 0) ? 0 : (g > 255) ? 255 : g; -} - -static WEBP_INLINE -void DoGradientFilter(const uint8_t* in, int width, int height, - int bpp, int stride, int inverse, uint8_t* out) { - const uint8_t* preds = (inverse ? out : in); - int h; - SANITY_CHECK(in, out); - - // left prediction for top scan-line - memcpy((void*)out, (const void*)in, bpp); - PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); - - // Filter line-by-line. - for (h = 1; h < height; ++h) { - int w; - preds += stride; - in += stride; - out += stride; - // leftmost pixel: predict from above. - PredictLine(in, preds - stride, out, bpp, inverse); - for (w = bpp; w < width * bpp; ++w) { - const int pred = GradientPredictor(preds[w - bpp], - preds[w - stride], - preds[w - stride - bpp]); - out[w] = in[w] + (inverse ? pred : -pred); - } - } + return ((g & ~0xff) == 0) ? g : (g < 0) ? 0 : 255; // clip to 8bit } -static void GradientFilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* filtered_data) { - DoGradientFilter(data, width, height, bpp, stride, 0, filtered_data); -} - -static void GradientUnfilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* recon_data) { - DoGradientFilter(data, width, height, bpp, stride, 1, recon_data); -} - -#undef SANITY_CHECK - -// ----------------------------------------------------------------------------- -// Quick estimate of a potentially interesting filter mode to try, in addition -// to the default NONE. - -#define SMAX 16 -#define SDIFF(a, b) (abs((a) - (b)) >> 4) // Scoring diff, in [0..SMAX) - -WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, - int width, int height, int stride) { +WEBP_FILTER_TYPE WebPEstimateBestFilter(const uint8_t* data, + int width, int height, int stride) { int i, j; int bins[WEBP_FILTER_LAST][SMAX]; memset(bins, 0, sizeof(bins)); + // We only sample every other pixels. That's enough. for (j = 2; j < height - 1; j += 2) { const uint8_t* const p = data + j * stride; @@ -185,7 +51,8 @@ WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, } } { - WEBP_FILTER_TYPE filter, best_filter = WEBP_FILTER_NONE; + int filter; + WEBP_FILTER_TYPE best_filter = WEBP_FILTER_NONE; int best_score = 0x7fffffff; for (filter = WEBP_FILTER_NONE; filter < WEBP_FILTER_LAST; ++filter) { int score = 0; @@ -196,7 +63,7 @@ WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, } if (score < best_score) { best_score = score; - best_filter = filter; + best_filter = (WEBP_FILTER_TYPE)filter; } } return best_filter; @@ -207,23 +74,3 @@ WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, #undef SDIFF //------------------------------------------------------------------------------ - -const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST] = { - NULL, // WEBP_FILTER_NONE - HorizontalFilter, // WEBP_FILTER_HORIZONTAL - VerticalFilter, // WEBP_FILTER_VERTICAL - GradientFilter // WEBP_FILTER_GRADIENT -}; - -const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST] = { - NULL, // WEBP_FILTER_NONE - HorizontalUnfilter, // WEBP_FILTER_HORIZONTAL - VerticalUnfilter, // WEBP_FILTER_VERTICAL - GradientUnfilter // WEBP_FILTER_GRADIENT -}; - -//------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/utils/filters.h b/drivers/webp/utils/filters.h index db886be29a..088b132fc5 100644 --- a/drivers/webp/utils/filters.h +++ b/drivers/webp/utils/filters.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Spatial prediction using various filters @@ -12,42 +14,18 @@ #ifndef WEBP_UTILS_FILTERS_H_ #define WEBP_UTILS_FILTERS_H_ -#include "../types.h" +#include "../webp/types.h" +#include "../dsp/dsp.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -// Filters. -typedef enum { - WEBP_FILTER_NONE = 0, - WEBP_FILTER_HORIZONTAL, - WEBP_FILTER_VERTICAL, - WEBP_FILTER_GRADIENT, - WEBP_FILTER_LAST = WEBP_FILTER_GRADIENT + 1, // end marker - WEBP_FILTER_BEST, - WEBP_FILTER_FAST -} WEBP_FILTER_TYPE; - -typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height, - int bpp, int stride, uint8_t* out); - -// Filter the given data using the given predictor. -// 'in' corresponds to a 2-dimensional pixel array of size (stride * height) -// in raster order. -// 'bpp' is number of bytes per pixel, and -// 'stride' is number of bytes per scan line (with possible padding). -// 'out' should be pre-allocated. -extern const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST]; - -// Reconstruct the original data from the given filtered data. -extern const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST]; - // Fast estimate of a potentially good filter. -extern WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, - int width, int height, int stride); +WEBP_FILTER_TYPE WebPEstimateBestFilter(const uint8_t* data, + int width, int height, int stride); -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/utils/huffman.c b/drivers/webp/utils/huffman.c index 1cc1cfd355..d57376aa6b 100644 --- a/drivers/webp/utils/huffman.c +++ b/drivers/webp/utils/huffman.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Utilities for building and looking up Huffman trees. @@ -11,228 +13,193 @@ #include <assert.h> #include <stdlib.h> +#include <string.h> #include "./huffman.h" #include "../utils/utils.h" -#include "../format_constants.h" +#include "../webp/format_constants.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +// Huffman data read via DecodeImageStream is represented in two (red and green) +// bytes. +#define MAX_HTREE_GROUPS 0x10000 -#define NON_EXISTENT_SYMBOL (-1) - -static void TreeNodeInit(HuffmanTreeNode* const node) { - node->children_ = -1; // means: 'unassigned so far' -} - -static int NodeIsEmpty(const HuffmanTreeNode* const node) { - return (node->children_ < 0); +HTreeGroup* VP8LHtreeGroupsNew(int num_htree_groups) { + HTreeGroup* const htree_groups = + (HTreeGroup*)WebPSafeMalloc(num_htree_groups, sizeof(*htree_groups)); + if (htree_groups == NULL) { + return NULL; + } + assert(num_htree_groups <= MAX_HTREE_GROUPS); + return htree_groups; } -static int IsFull(const HuffmanTree* const tree) { - return (tree->num_nodes_ == tree->max_nodes_); +void VP8LHtreeGroupsFree(HTreeGroup* const htree_groups) { + if (htree_groups != NULL) { + WebPSafeFree(htree_groups); + } } -static void AssignChildren(HuffmanTree* const tree, - HuffmanTreeNode* const node) { - HuffmanTreeNode* const children = tree->root_ + tree->num_nodes_; - node->children_ = (int)(children - node); - assert(children - node == (int)(children - node)); - tree->num_nodes_ += 2; - TreeNodeInit(children + 0); - TreeNodeInit(children + 1); +// Returns reverse(reverse(key, len) + 1, len), where reverse(key, len) is the +// bit-wise reversal of the len least significant bits of key. +static WEBP_INLINE uint32_t GetNextKey(uint32_t key, int len) { + uint32_t step = 1 << (len - 1); + while (key & step) { + step >>= 1; + } + return (key & (step - 1)) + step; } -static int TreeInit(HuffmanTree* const tree, int num_leaves) { - assert(tree != NULL); - if (num_leaves == 0) return 0; - // We allocate maximum possible nodes in the tree at once. - // Note that a Huffman tree is a full binary tree; and in a full binary tree - // with L leaves, the total number of nodes N = 2 * L - 1. - tree->max_nodes_ = 2 * num_leaves - 1; - tree->root_ = (HuffmanTreeNode*)WebPSafeMalloc((uint64_t)tree->max_nodes_, - sizeof(*tree->root_)); - if (tree->root_ == NULL) return 0; - TreeNodeInit(tree->root_); // Initialize root. - tree->num_nodes_ = 1; - return 1; +// Stores code in table[0], table[step], table[2*step], ..., table[end]. +// Assumes that end is an integer multiple of step. +static WEBP_INLINE void ReplicateValue(HuffmanCode* table, + int step, int end, + HuffmanCode code) { + assert(end % step == 0); + do { + end -= step; + table[end] = code; + } while (end > 0); } -void HuffmanTreeRelease(HuffmanTree* const tree) { - if (tree != NULL) { - free(tree->root_); - tree->root_ = NULL; - tree->max_nodes_ = 0; - tree->num_nodes_ = 0; +// Returns the table width of the next 2nd level table. count is the histogram +// of bit lengths for the remaining symbols, len is the code length of the next +// processed symbol +static WEBP_INLINE int NextTableBitSize(const int* const count, + int len, int root_bits) { + int left = 1 << (len - root_bits); + while (len < MAX_ALLOWED_CODE_LENGTH) { + left -= count[len]; + if (left <= 0) break; + ++len; + left <<= 1; } + return len - root_bits; } -int HuffmanCodeLengthsToCodes(const int* const code_lengths, - int code_lengths_size, int* const huff_codes) { - int symbol; - int code_len; - int code_length_hist[MAX_ALLOWED_CODE_LENGTH + 1] = { 0 }; - int curr_code; - int next_codes[MAX_ALLOWED_CODE_LENGTH + 1] = { 0 }; - int max_code_length = 0; - +int VP8LBuildHuffmanTable(HuffmanCode* const root_table, int root_bits, + const int code_lengths[], int code_lengths_size) { + HuffmanCode* table = root_table; // next available space in table + int total_size = 1 << root_bits; // total size root table + 2nd level table + int* sorted = NULL; // symbols sorted by code length + int len; // current code length + int symbol; // symbol index in original or sorted table + // number of codes of each length: + int count[MAX_ALLOWED_CODE_LENGTH + 1] = { 0 }; + // offsets in sorted table for each length: + int offset[MAX_ALLOWED_CODE_LENGTH + 1]; + + assert(code_lengths_size != 0); assert(code_lengths != NULL); - assert(code_lengths_size > 0); - assert(huff_codes != NULL); + assert(root_table != NULL); + assert(root_bits > 0); - // Calculate max code length. + // Build histogram of code lengths. for (symbol = 0; symbol < code_lengths_size; ++symbol) { - if (code_lengths[symbol] > max_code_length) { - max_code_length = code_lengths[symbol]; + if (code_lengths[symbol] > MAX_ALLOWED_CODE_LENGTH) { + return 0; } + ++count[code_lengths[symbol]]; } - if (max_code_length > MAX_ALLOWED_CODE_LENGTH) return 0; - // Calculate code length histogram. - for (symbol = 0; symbol < code_lengths_size; ++symbol) { - ++code_length_hist[code_lengths[symbol]]; - } - code_length_hist[0] = 0; - - // Calculate the initial values of 'next_codes' for each code length. - // next_codes[code_len] denotes the code to be assigned to the next symbol - // of code length 'code_len'. - curr_code = 0; - next_codes[0] = -1; // Unused, as code length = 0 implies code doesn't exist. - for (code_len = 1; code_len <= max_code_length; ++code_len) { - curr_code = (curr_code + code_length_hist[code_len - 1]) << 1; - next_codes[code_len] = curr_code; + // Error, all code lengths are zeros. + if (count[0] == code_lengths_size) { + return 0; } - // Get symbols. - for (symbol = 0; symbol < code_lengths_size; ++symbol) { - if (code_lengths[symbol] > 0) { - huff_codes[symbol] = next_codes[code_lengths[symbol]]++; - } else { - huff_codes[symbol] = NON_EXISTENT_SYMBOL; - } - } - return 1; -} - -static int TreeAddSymbol(HuffmanTree* const tree, - int symbol, int code, int code_length) { - HuffmanTreeNode* node = tree->root_; - const HuffmanTreeNode* const max_node = tree->root_ + tree->max_nodes_; - while (code_length-- > 0) { - if (node >= max_node) { + // Generate offsets into sorted symbol table by code length. + offset[1] = 0; + for (len = 1; len < MAX_ALLOWED_CODE_LENGTH; ++len) { + if (count[len] > (1 << len)) { return 0; } - if (NodeIsEmpty(node)) { - if (IsFull(tree)) return 0; // error: too many symbols. - AssignChildren(tree, node); - } else if (HuffmanTreeNodeIsLeaf(node)) { - return 0; // leaf is already occupied. - } - node += node->children_ + ((code >> code_length) & 1); - } - if (NodeIsEmpty(node)) { - node->children_ = 0; // turn newly created node into a leaf. - } else if (!HuffmanTreeNodeIsLeaf(node)) { - return 0; // trying to assign a symbol to already used code. + offset[len + 1] = offset[len] + count[len]; } - node->symbol_ = symbol; // Add symbol in this node. - return 1; -} -int HuffmanTreeBuildImplicit(HuffmanTree* const tree, - const int* const code_lengths, - int code_lengths_size) { - int symbol; - int num_symbols = 0; - int root_symbol = 0; - - assert(tree != NULL); - assert(code_lengths != NULL); + sorted = (int*)WebPSafeMalloc(code_lengths_size, sizeof(*sorted)); + if (sorted == NULL) { + return 0; + } - // Find out number of symbols and the root symbol. + // Sort symbols by length, by symbol order within each length. for (symbol = 0; symbol < code_lengths_size; ++symbol) { + const int symbol_code_length = code_lengths[symbol]; if (code_lengths[symbol] > 0) { - // Note: code length = 0 indicates non-existent symbol. - ++num_symbols; - root_symbol = symbol; + sorted[offset[symbol_code_length]++] = symbol; } } - // Initialize the tree. Will fail for num_symbols = 0 - if (!TreeInit(tree, num_symbols)) return 0; - - // Build tree. - if (num_symbols == 1) { // Trivial case. - const int max_symbol = code_lengths_size; - if (root_symbol < 0 || root_symbol >= max_symbol) { - HuffmanTreeRelease(tree); - return 0; - } - return TreeAddSymbol(tree, root_symbol, 0, 0); - } else { // Normal case. - int ok = 0; - - // Get Huffman codes from the code lengths. - int* const codes = - (int*)WebPSafeMalloc((uint64_t)code_lengths_size, sizeof(*codes)); - if (codes == NULL) goto End; + // Special case code with only one value. + if (offset[MAX_ALLOWED_CODE_LENGTH] == 1) { + HuffmanCode code; + code.bits = 0; + code.value = (uint16_t)sorted[0]; + ReplicateValue(table, 1, total_size, code); + WebPSafeFree(sorted); + return total_size; + } - if (!HuffmanCodeLengthsToCodes(code_lengths, code_lengths_size, codes)) { - goto End; + { + int step; // step size to replicate values in current table + uint32_t low = -1; // low bits for current root entry + uint32_t mask = total_size - 1; // mask for low bits + uint32_t key = 0; // reversed prefix code + int num_nodes = 1; // number of Huffman tree nodes + int num_open = 1; // number of open branches in current tree level + int table_bits = root_bits; // key length of current table + int table_size = 1 << table_bits; // size of current table + symbol = 0; + // Fill in root table. + for (len = 1, step = 2; len <= root_bits; ++len, step <<= 1) { + num_open <<= 1; + num_nodes += num_open; + num_open -= count[len]; + if (num_open < 0) { + WebPSafeFree(sorted); + return 0; + } + for (; count[len] > 0; --count[len]) { + HuffmanCode code; + code.bits = (uint8_t)len; + code.value = (uint16_t)sorted[symbol++]; + ReplicateValue(&table[key], step, table_size, code); + key = GetNextKey(key, len); + } } - // Add symbols one-by-one. - for (symbol = 0; symbol < code_lengths_size; ++symbol) { - if (code_lengths[symbol] > 0) { - if (!TreeAddSymbol(tree, symbol, codes[symbol], code_lengths[symbol])) { - goto End; + // Fill in 2nd level tables and add pointers to root table. + for (len = root_bits + 1, step = 2; len <= MAX_ALLOWED_CODE_LENGTH; + ++len, step <<= 1) { + num_open <<= 1; + num_nodes += num_open; + num_open -= count[len]; + if (num_open < 0) { + WebPSafeFree(sorted); + return 0; + } + for (; count[len] > 0; --count[len]) { + HuffmanCode code; + if ((key & mask) != low) { + table += table_size; + table_bits = NextTableBitSize(count, len, root_bits); + table_size = 1 << table_bits; + total_size += table_size; + low = key & mask; + root_table[low].bits = (uint8_t)(table_bits + root_bits); + root_table[low].value = (uint16_t)((table - root_table) - low); } + code.bits = (uint8_t)(len - root_bits); + code.value = (uint16_t)sorted[symbol++]; + ReplicateValue(&table[key >> root_bits], step, table_size, code); + key = GetNextKey(key, len); } } - ok = 1; - End: - free(codes); - ok = ok && IsFull(tree); - if (!ok) HuffmanTreeRelease(tree); - return ok; - } -} - -int HuffmanTreeBuildExplicit(HuffmanTree* const tree, - const int* const code_lengths, - const int* const codes, - const int* const symbols, int max_symbol, - int num_symbols) { - int ok = 0; - int i; - - assert(tree != NULL); - assert(code_lengths != NULL); - assert(codes != NULL); - assert(symbols != NULL); - - // Initialize the tree. Will fail if num_symbols = 0. - if (!TreeInit(tree, num_symbols)) return 0; - // Add symbols one-by-one. - for (i = 0; i < num_symbols; ++i) { - if (codes[i] != NON_EXISTENT_SYMBOL) { - if (symbols[i] < 0 || symbols[i] >= max_symbol) { - goto End; - } - if (!TreeAddSymbol(tree, symbols[i], codes[i], code_lengths[i])) { - goto End; - } + // Check if tree is full. + if (num_nodes != 2 * offset[MAX_ALLOWED_CODE_LENGTH] - 1) { + WebPSafeFree(sorted); + return 0; } } - ok = 1; - End: - ok = ok && IsFull(tree); - if (!ok) HuffmanTreeRelease(tree); - return ok; -} -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif + WebPSafeFree(sorted); + return total_size; +} diff --git a/drivers/webp/utils/huffman.h b/drivers/webp/utils/huffman.h index f16447e649..c6dd6aaa45 100644 --- a/drivers/webp/utils/huffman.h +++ b/drivers/webp/utils/huffman.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Utilities for building and looking up Huffman trees. @@ -13,65 +15,73 @@ #define WEBP_UTILS_HUFFMAN_H_ #include <assert.h> -#include "../types.h" +#include "../webp/format_constants.h" +#include "../webp/types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -// A node of a Huffman tree. -typedef struct { - int symbol_; - int children_; // delta offset to both children (contiguous) or 0 if leaf. -} HuffmanTreeNode; +#define HUFFMAN_TABLE_BITS 8 +#define HUFFMAN_TABLE_MASK ((1 << HUFFMAN_TABLE_BITS) - 1) + +#define LENGTHS_TABLE_BITS 7 +#define LENGTHS_TABLE_MASK ((1 << LENGTHS_TABLE_BITS) - 1) -// Huffman Tree. -typedef struct HuffmanTree HuffmanTree; -struct HuffmanTree { - HuffmanTreeNode* root_; // all the nodes, starting at root. - int max_nodes_; // max number of nodes - int num_nodes_; // number of currently occupied nodes -}; -// Returns true if the given node is a leaf of the Huffman tree. -static WEBP_INLINE int HuffmanTreeNodeIsLeaf( - const HuffmanTreeNode* const node) { - return (node->children_ == 0); -} +// Huffman lookup table entry +typedef struct { + uint8_t bits; // number of bits used for this symbol + uint16_t value; // symbol value or table offset +} HuffmanCode; -// Go down one level. Most critical function. 'right_child' must be 0 or 1. -static WEBP_INLINE const HuffmanTreeNode* HuffmanTreeNextNode( - const HuffmanTreeNode* node, int right_child) { - return node + node->children_ + right_child; -} +// long version for holding 32b values +typedef struct { + int bits; // number of bits used for this symbol, + // or an impossible value if not a literal code. + uint32_t value; // 32b packed ARGB value if literal, + // or non-literal symbol otherwise +} HuffmanCode32; -// Releases the nodes of the Huffman tree. -// Note: It does NOT free 'tree' itself. -void HuffmanTreeRelease(HuffmanTree* const tree); +#define HUFFMAN_PACKED_BITS 6 +#define HUFFMAN_PACKED_TABLE_SIZE (1u << HUFFMAN_PACKED_BITS) -// Builds Huffman tree assuming code lengths are implicitly in symbol order. -// Returns false in case of error (invalid tree or memory error). -int HuffmanTreeBuildImplicit(HuffmanTree* const tree, - const int* const code_lengths, - int code_lengths_size); +// Huffman table group. +// Includes special handling for the following cases: +// - is_trivial_literal: one common literal base for RED/BLUE/ALPHA (not GREEN) +// - is_trivial_code: only 1 code (no bit is read from bitstream) +// - use_packed_table: few enough literal symbols, so all the bit codes +// can fit into a small look-up table packed_table[] +// The common literal base, if applicable, is stored in 'literal_arb'. +typedef struct HTreeGroup HTreeGroup; +struct HTreeGroup { + HuffmanCode* htrees[HUFFMAN_CODES_PER_META_CODE]; + int is_trivial_literal; // True, if huffman trees for Red, Blue & Alpha + // Symbols are trivial (have a single code). + uint32_t literal_arb; // If is_trivial_literal is true, this is the + // ARGB value of the pixel, with Green channel + // being set to zero. + int is_trivial_code; // true if is_trivial_literal with only one code + int use_packed_table; // use packed table below for short literal code + // table mapping input bits to a packed values, or escape case to literal code + HuffmanCode32 packed_table[HUFFMAN_PACKED_TABLE_SIZE]; +}; -// Build a Huffman tree with explicitly given lists of code lengths, codes -// and symbols. Verifies that all symbols added are smaller than max_symbol. -// Returns false in case of an invalid symbol, invalid tree or memory error. -int HuffmanTreeBuildExplicit(HuffmanTree* const tree, - const int* const code_lengths, - const int* const codes, - const int* const symbols, int max_symbol, - int num_symbols); +// Creates the instance of HTreeGroup with specified number of tree-groups. +HTreeGroup* VP8LHtreeGroupsNew(int num_htree_groups); -// Utility: converts Huffman code lengths to corresponding Huffman codes. -// 'huff_codes' should be pre-allocated. -// Returns false in case of error (memory allocation, invalid codes). -int HuffmanCodeLengthsToCodes(const int* const code_lengths, - int code_lengths_size, int* const huff_codes); +// Releases the memory allocated for HTreeGroup. +void VP8LHtreeGroupsFree(HTreeGroup* const htree_groups); +// Builds Huffman lookup table assuming code lengths are in symbol order. +// The 'code_lengths' is pre-allocated temporary memory buffer used for creating +// the huffman table. +// Returns built table size or 0 in case of error (invalid tree or +// memory error). +int VP8LBuildHuffmanTable(HuffmanCode* const root_table, int root_bits, + const int code_lengths[], int code_lengths_size); -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/utils/huffman_encode.c b/drivers/webp/utils/huffman_encode.c index e172b10a85..6421c2beed 100644 --- a/drivers/webp/utils/huffman_encode.c +++ b/drivers/webp/utils/huffman_encode.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Author: Jyrki Alakuijala (jyrki@google.com) @@ -14,7 +16,7 @@ #include <string.h> #include "./huffman_encode.h" #include "../utils/utils.h" -#include "../format_constants.h" +#include "../webp/format_constants.h" // ----------------------------------------------------------------------------- // Util function to optimize the symbol map for RLE coding @@ -25,14 +27,14 @@ static int ValuesShouldBeCollapsedToStrideAverage(int a, int b) { } // Change the population counts in a way that the consequent -// Hufmann tree compression, especially its RLE-part, give smaller output. -static int OptimizeHuffmanForRle(int length, int* const counts) { - uint8_t* good_for_rle; +// Huffman tree compression, especially its RLE-part, give smaller output. +static void OptimizeHuffmanForRle(int length, uint8_t* const good_for_rle, + uint32_t* const counts) { // 1) Let's make the Huffman code more compatible with rle encoding. int i; for (; length >= 0; --length) { if (length == 0) { - return 1; // All zeros. + return; // All zeros. } if (counts[length - 1] != 0) { // Now counts[0..length - 1] does not have trailing zeros. @@ -41,15 +43,11 @@ static int OptimizeHuffmanForRle(int length, int* const counts) { } // 2) Let's mark all population counts that already can be encoded // with an rle code. - good_for_rle = (uint8_t*)calloc(length, 1); - if (good_for_rle == NULL) { - return 0; - } { // Let's not spoil any of the existing good rle codes. // Mark any seq of 0's that is longer as 5 as a good_for_rle. // Mark any seq of non-0's that is longer as 7 as a good_for_rle. - int symbol = counts[0]; + uint32_t symbol = counts[0]; int stride = 0; for (i = 0; i < length + 1; ++i) { if (i == length || counts[i] != symbol) { @@ -71,17 +69,17 @@ static int OptimizeHuffmanForRle(int length, int* const counts) { } // 3) Let's replace those population counts that lead to more rle codes. { - int stride = 0; - int limit = counts[0]; - int sum = 0; + uint32_t stride = 0; + uint32_t limit = counts[0]; + uint32_t sum = 0; for (i = 0; i < length + 1; ++i) { if (i == length || good_for_rle[i] || (i != 0 && good_for_rle[i - 1]) || !ValuesShouldBeCollapsedToStrideAverage(counts[i], limit)) { if (stride >= 4 || (stride >= 3 && sum == 0)) { - int k; + uint32_t k; // The stride must end, collapse what we have, if we have enough (4). - int count = (sum + stride / 2) / stride; + uint32_t count = (sum + stride / 2) / stride; if (count < 1) { count = 1; } @@ -117,17 +115,8 @@ static int OptimizeHuffmanForRle(int length, int* const counts) { } } } - free(good_for_rle); - return 1; } -typedef struct { - int total_count_; - int value_; - int pool_index_left_; - int pool_index_right_; -} HuffmanTree; - // A comparer function for two Huffman trees: sorts first by 'total count' // (more comes first), and then by 'value' (more comes first). static int CompareHuffmanTrees(const void* ptr1, const void* ptr2) { @@ -138,13 +127,8 @@ static int CompareHuffmanTrees(const void* ptr1, const void* ptr2) { } else if (t1->total_count_ < t2->total_count_) { return 1; } else { - if (t1->value_ < t2->value_) { - return -1; - } - if (t1->value_ > t2->value_) { - return 1; - } - return 0; + assert(t1->value_ != t2->value_); + return (t1->value_ < t2->value_) ? -1 : 1; } } @@ -178,12 +162,12 @@ static void SetBitDepths(const HuffmanTree* const tree, // we are not planning to use this with extremely long blocks. // // See http://en.wikipedia.org/wiki/Huffman_coding -static int GenerateOptimalTree(const int* const histogram, int histogram_size, - int tree_depth_limit, - uint8_t* const bit_depths) { - int count_min; +static void GenerateOptimalTree(const uint32_t* const histogram, + int histogram_size, + HuffmanTree* tree, int tree_depth_limit, + uint8_t* const bit_depths) { + uint32_t count_min; HuffmanTree* tree_pool; - HuffmanTree* tree; int tree_size_orig = 0; int i; @@ -193,12 +177,10 @@ static int GenerateOptimalTree(const int* const histogram, int histogram_size, } } - // 3 * tree_size is enough to cover all the nodes representing a - // population and all the inserted nodes combining two existing nodes. - // The tree pool needs 2 * (tree_size_orig - 1) entities, and the - // tree needs exactly tree_size_orig entities. - tree = (HuffmanTree*)WebPSafeMalloc(3ULL * tree_size_orig, sizeof(*tree)); - if (tree == NULL) return 0; + if (tree_size_orig == 0) { // pretty optimal already! + return; + } + tree_pool = tree + tree_size_orig; // For block sizes with less than 64k symbols we never need to do a @@ -214,7 +196,7 @@ static int GenerateOptimalTree(const int* const histogram, int histogram_size, int j; for (j = 0; j < histogram_size; ++j) { if (histogram[j] != 0) { - const int count = + const uint32_t count = (histogram[j] < count_min) ? count_min : histogram[j]; tree[idx].total_count_ = count; tree[idx].value_ = j; @@ -230,11 +212,11 @@ static int GenerateOptimalTree(const int* const histogram, int histogram_size, if (tree_size > 1) { // Normal case. int tree_pool_size = 0; while (tree_size > 1) { // Finish when we have only one root. - int count; + uint32_t count; tree_pool[tree_pool_size++] = tree[tree_size - 1]; tree_pool[tree_pool_size++] = tree[tree_size - 2]; count = tree_pool[tree_pool_size - 1].total_count_ + - tree_pool[tree_pool_size - 2].total_count_; + tree_pool[tree_pool_size - 2].total_count_; tree_size -= 2; { // Search for the insertion point. @@ -271,8 +253,6 @@ static int GenerateOptimalTree(const int* const histogram, int histogram_size, } } } - free(tree); - return 1; } // ----------------------------------------------------------------------------- @@ -423,17 +403,15 @@ static void ConvertBitDepthsToSymbols(HuffmanTreeCode* const tree) { // ----------------------------------------------------------------------------- // Main entry point -int VP8LCreateHuffmanTree(int* const histogram, int tree_depth_limit, - HuffmanTreeCode* const tree) { - const int num_symbols = tree->num_symbols; - if (!OptimizeHuffmanForRle(num_symbols, histogram)) { - return 0; - } - if (!GenerateOptimalTree(histogram, num_symbols, - tree_depth_limit, tree->code_lengths)) { - return 0; - } +void VP8LCreateHuffmanTree(uint32_t* const histogram, int tree_depth_limit, + uint8_t* const buf_rle, + HuffmanTree* const huff_tree, + HuffmanTreeCode* const huff_code) { + const int num_symbols = huff_code->num_symbols; + memset(buf_rle, 0, num_symbols * sizeof(*buf_rle)); + OptimizeHuffmanForRle(num_symbols, buf_rle, histogram); + GenerateOptimalTree(histogram, num_symbols, huff_tree, tree_depth_limit, + huff_code->code_lengths); // Create the actual bit codes for the bit lengths. - ConvertBitDepthsToSymbols(tree); - return 1; + ConvertBitDepthsToSymbols(huff_code); } diff --git a/drivers/webp/utils/huffman_encode.h b/drivers/webp/utils/huffman_encode.h index 7f4aedc102..a157165148 100644 --- a/drivers/webp/utils/huffman_encode.h +++ b/drivers/webp/utils/huffman_encode.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Author: Jyrki Alakuijala (jyrki@google.com) @@ -12,9 +14,9 @@ #ifndef WEBP_UTILS_HUFFMAN_ENCODE_H_ #define WEBP_UTILS_HUFFMAN_ENCODE_H_ -#include "../types.h" +#include "../webp/types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -31,16 +33,27 @@ typedef struct { uint16_t* codes; // Symbol Codes. } HuffmanTreeCode; +// Struct to represent the Huffman tree. +typedef struct { + uint32_t total_count_; // Symbol frequency. + int value_; // Symbol value. + int pool_index_left_; // Index for the left sub-tree. + int pool_index_right_; // Index for the right sub-tree. +} HuffmanTree; + // Turn the Huffman tree into a token sequence. // Returns the number of tokens used. int VP8LCreateCompressedHuffmanTree(const HuffmanTreeCode* const tree, HuffmanTreeToken* tokens, int max_tokens); // Create an optimized tree, and tokenize it. -int VP8LCreateHuffmanTree(int* const histogram, int tree_depth_limit, - HuffmanTreeCode* const tree); +// 'buf_rle' and 'huff_tree' are pre-allocated and the 'tree' is the constructed +// huffman code tree. +void VP8LCreateHuffmanTree(uint32_t* const histogram, int tree_depth_limit, + uint8_t* const buf_rle, HuffmanTree* const huff_tree, + HuffmanTreeCode* const tree); -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } #endif diff --git a/drivers/webp/utils/quant_levels.c b/drivers/webp/utils/quant_levels.c index f6884392aa..d7c8aab922 100644 --- a/drivers/webp/utils/quant_levels.c +++ b/drivers/webp/utils/quant_levels.c @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Quantize levels for specified number of quantization-levels ([2, 256]). @@ -14,10 +16,6 @@ #include "./quant_levels.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - #define NUM_SYMBOLS 256 #define MAX_ITER 6 // Maximum number of convergence steps. @@ -140,15 +138,3 @@ int QuantizeLevels(uint8_t* const data, int width, int height, return 1; } -int DequantizeLevels(uint8_t* const data, int width, int height) { - if (data == NULL || width <= 0 || height <= 0) return 0; - // TODO(skal): implement gradient smoothing. - (void)data; - (void)width; - (void)height; - return 1; -} - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/utils/quant_levels.h b/drivers/webp/utils/quant_levels.h index 4f165fd230..1cb5a32cae 100644 --- a/drivers/webp/utils/quant_levels.h +++ b/drivers/webp/utils/quant_levels.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Alpha plane quantization utility @@ -14,9 +16,9 @@ #include <stdlib.h> -#include "../types.h" +#include "../webp/types.h" -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif @@ -27,12 +29,7 @@ extern "C" { int QuantizeLevels(uint8_t* const data, int width, int height, int num_levels, uint64_t* const sse); -// Apply post-processing to input 'data' of size 'width'x'height' assuming -// that the source was quantized to a reduced number of levels. -// Returns false in case of error (data is NULL, invalid parameters, ...). -int DequantizeLevels(uint8_t* const data, int width, int height); - -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/utils/rescaler.c b/drivers/webp/utils/rescaler.c index 9825dcbc5f..00c9300bfb 100644 --- a/drivers/webp/utils/rescaler.c +++ b/drivers/webp/utils/rescaler.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Rescaling functions @@ -11,124 +13,116 @@ #include <assert.h> #include <stdlib.h> +#include <string.h> +#include "../dsp/dsp.h" #include "./rescaler.h" //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -#define RFIX 30 -#define MULT_FIX(x,y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX) - void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height, - uint8_t* const dst, int dst_width, int dst_height, - int dst_stride, int num_channels, int x_add, int x_sub, - int y_add, int y_sub, int32_t* const work) { + uint8_t* const dst, + int dst_width, int dst_height, int dst_stride, + int num_channels, rescaler_t* const work) { + const int x_add = src_width, x_sub = dst_width; + const int y_add = src_height, y_sub = dst_height; wrk->x_expand = (src_width < dst_width); + wrk->y_expand = (src_height < dst_height); wrk->src_width = src_width; wrk->src_height = src_height; wrk->dst_width = dst_width; wrk->dst_height = dst_height; + wrk->src_y = 0; + wrk->dst_y = 0; wrk->dst = dst; wrk->dst_stride = dst_stride; wrk->num_channels = num_channels; + // for 'x_expand', we use bilinear interpolation - wrk->x_add = wrk->x_expand ? (x_sub - 1) : x_add - x_sub; + wrk->x_add = wrk->x_expand ? (x_sub - 1) : x_add; wrk->x_sub = wrk->x_expand ? (x_add - 1) : x_sub; - wrk->y_accum = y_add; - wrk->y_add = y_add; - wrk->y_sub = y_sub; - wrk->fx_scale = (1 << RFIX) / x_sub; - wrk->fy_scale = (1 << RFIX) / y_sub; - wrk->fxy_scale = wrk->x_expand ? - ((int64_t)dst_height << RFIX) / (x_sub * src_height) : - ((int64_t)dst_height << RFIX) / (x_add * src_height); + if (!wrk->x_expand) { // fx_scale is not used otherwise + wrk->fx_scale = WEBP_RESCALER_FRAC(1, wrk->x_sub); + } + // vertical scaling parameters + wrk->y_add = wrk->y_expand ? y_add - 1 : y_add; + wrk->y_sub = wrk->y_expand ? y_sub - 1 : y_sub; + wrk->y_accum = wrk->y_expand ? wrk->y_sub : wrk->y_add; + if (!wrk->y_expand) { + // this is WEBP_RESCALER_FRAC(dst_height, x_add * y_add) without the cast. + const uint64_t ratio = + (uint64_t)dst_height * WEBP_RESCALER_ONE / (wrk->x_add * wrk->y_add); + if (ratio != (uint32_t)ratio) { + // We can't represent the ratio with the current fixed-point precision. + // => We special-case fxy_scale = 0, in WebPRescalerExportRow(). + wrk->fxy_scale = 0; + } else { + wrk->fxy_scale = (uint32_t)ratio; + } + wrk->fy_scale = WEBP_RESCALER_FRAC(1, wrk->y_sub); + } else { + wrk->fy_scale = WEBP_RESCALER_FRAC(1, wrk->x_add); + // wrk->fxy_scale is unused here. + } wrk->irow = work; wrk->frow = work + num_channels * dst_width; -} + memset(work, 0, 2 * dst_width * num_channels * sizeof(*work)); -void WebPRescalerImportRow(WebPRescaler* const wrk, - const uint8_t* const src, int channel) { - const int x_stride = wrk->num_channels; - const int x_out_max = wrk->dst_width * wrk->num_channels; - int x_in = channel; - int x_out; - int accum = 0; - if (!wrk->x_expand) { - int sum = 0; - for (x_out = channel; x_out < x_out_max; x_out += x_stride) { - accum += wrk->x_add; - for (; accum > 0; accum -= wrk->x_sub) { - sum += src[x_in]; - x_in += x_stride; - } - { // Emit next horizontal pixel. - const int32_t base = src[x_in]; - const int32_t frac = base * (-accum); - x_in += x_stride; - wrk->frow[x_out] = (sum + base) * wrk->x_sub - frac; - // fresh fractional start for next pixel - sum = (int)MULT_FIX(frac, wrk->fx_scale); - } - } - } else { // simple bilinear interpolation - int left = src[channel], right = src[channel]; - for (x_out = channel; x_out < x_out_max; x_out += x_stride) { - if (accum < 0) { - left = right; - x_in += x_stride; - right = src[x_in]; - accum += wrk->x_add; - } - wrk->frow[x_out] = right * wrk->x_add + (left - right) * accum; - accum -= wrk->x_sub; - } - } - // Accumulate the new row's contribution - for (x_out = channel; x_out < x_out_max; x_out += x_stride) { - wrk->irow[x_out] += wrk->frow[x_out]; - } + WebPRescalerDspInit(); } -uint8_t* WebPRescalerExportRow(WebPRescaler* const wrk) { - if (wrk->y_accum <= 0) { - int x_out; - uint8_t* const dst = wrk->dst; - int32_t* const irow = wrk->irow; - const int32_t* const frow = wrk->frow; - const int yscale = wrk->fy_scale * (-wrk->y_accum); - const int x_out_max = wrk->dst_width * wrk->num_channels; +int WebPRescalerGetScaledDimensions(int src_width, int src_height, + int* const scaled_width, + int* const scaled_height) { + assert(scaled_width != NULL); + assert(scaled_height != NULL); + { + int width = *scaled_width; + int height = *scaled_height; - for (x_out = 0; x_out < x_out_max; ++x_out) { - const int frac = (int)MULT_FIX(frow[x_out], yscale); - const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale); - dst[x_out] = (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255; - irow[x_out] = frac; // new fractional start + // if width is unspecified, scale original proportionally to height ratio. + if (width == 0) { + width = (src_width * height + src_height / 2) / src_height; } - wrk->y_accum += wrk->y_add; - wrk->dst += wrk->dst_stride; - return dst; - } else { - return NULL; + // if height is unspecified, scale original proportionally to width ratio. + if (height == 0) { + height = (src_height * width + src_width / 2) / src_width; + } + // Check if the overall dimensions still make sense. + if (width <= 0 || height <= 0) { + return 0; + } + + *scaled_width = width; + *scaled_height = height; + return 1; } } -#undef MULT_FIX -#undef RFIX - //------------------------------------------------------------------------------ // all-in-one calls +int WebPRescaleNeededLines(const WebPRescaler* const wrk, int max_num_lines) { + const int num_lines = (wrk->y_accum + wrk->y_sub - 1) / wrk->y_sub; + return (num_lines > max_num_lines) ? max_num_lines : num_lines; +} + int WebPRescalerImport(WebPRescaler* const wrk, int num_lines, const uint8_t* src, int src_stride) { int total_imported = 0; - while (total_imported < num_lines && wrk->y_accum > 0) { - int channel; - for (channel = 0; channel < wrk->num_channels; ++channel) { - WebPRescalerImportRow(wrk, src, channel); + while (total_imported < num_lines && !WebPRescalerHasPendingOutput(wrk)) { + if (wrk->y_expand) { + rescaler_t* const tmp = wrk->irow; + wrk->irow = wrk->frow; + wrk->frow = tmp; } + WebPRescalerImportRow(wrk, src); + if (!wrk->y_expand) { // Accumulate the contribution of the new row. + int x; + for (x = 0; x < wrk->num_channels * wrk->dst_width; ++x) { + wrk->irow[x] += wrk->frow[x]; + } + } + ++wrk->src_y; src += src_stride; ++total_imported; wrk->y_accum -= wrk->y_sub; @@ -146,7 +140,3 @@ int WebPRescalerExport(WebPRescaler* const rescaler) { } //------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif diff --git a/drivers/webp/utils/rescaler.h b/drivers/webp/utils/rescaler.h index 9c9133d19b..98b01a76d0 100644 --- a/drivers/webp/utils/rescaler.h +++ b/drivers/webp/utils/rescaler.h @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Rescaling functions @@ -12,64 +14,87 @@ #ifndef WEBP_UTILS_RESCALER_H_ #define WEBP_UTILS_RESCALER_H_ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus extern "C" { #endif -#include "../types.h" +#include "../webp/types.h" + +#define WEBP_RESCALER_RFIX 32 // fixed-point precision for multiplies +#define WEBP_RESCALER_ONE (1ull << WEBP_RESCALER_RFIX) +#define WEBP_RESCALER_FRAC(x, y) \ + ((uint32_t)(((uint64_t)(x) << WEBP_RESCALER_RFIX) / (y))) // Structure used for on-the-fly rescaling -typedef struct { +typedef uint32_t rescaler_t; // type for side-buffer +typedef struct WebPRescaler WebPRescaler; +struct WebPRescaler { int x_expand; // true if we're expanding in the x direction + int y_expand; // true if we're expanding in the y direction int num_channels; // bytes to jump between pixels - int fy_scale, fx_scale; // fixed-point scaling factor - int64_t fxy_scale; // '' - // we need hpel-precise add/sub increments, for the downsampled U/V planes. + uint32_t fx_scale; // fixed-point scaling factors + uint32_t fy_scale; // '' + uint32_t fxy_scale; // '' int y_accum; // vertical accumulator - int y_add, y_sub; // vertical increments (add ~= src, sub ~= dst) - int x_add, x_sub; // horizontal increments (add ~= src, sub ~= dst) + int y_add, y_sub; // vertical increments + int x_add, x_sub; // horizontal increments int src_width, src_height; // source dimensions int dst_width, dst_height; // destination dimensions + int src_y, dst_y; // row counters for input and output uint8_t* dst; int dst_stride; - int32_t* irow, *frow; // work buffer -} WebPRescaler; + rescaler_t* irow, *frow; // work buffer +}; // Initialize a rescaler given scratch area 'work' and dimensions of src & dst. -void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height, +void WebPRescalerInit(WebPRescaler* const rescaler, + int src_width, int src_height, uint8_t* const dst, int dst_width, int dst_height, int dst_stride, int num_channels, - int x_add, int x_sub, - int y_add, int y_sub, - int32_t* const work); + rescaler_t* const work); + +// If either 'scaled_width' or 'scaled_height' (but not both) is 0 the value +// will be calculated preserving the aspect ratio, otherwise the values are +// left unmodified. Returns true on success, false if either value is 0 after +// performing the scaling calculation. +int WebPRescalerGetScaledDimensions(int src_width, int src_height, + int* const scaled_width, + int* const scaled_height); -// Import a row of data and save its contribution in the rescaler. -// 'channel' denotes the channel number to be imported. -void WebPRescalerImportRow(WebPRescaler* const rescaler, - const uint8_t* const src, int channel); +// Returns the number of input lines needed next to produce one output line, +// considering that the maximum available input lines are 'max_num_lines'. +int WebPRescaleNeededLines(const WebPRescaler* const rescaler, + int max_num_lines); // Import multiple rows over all channels, until at least one row is ready to // be exported. Returns the actual number of lines that were imported. int WebPRescalerImport(WebPRescaler* const rescaler, int num_rows, const uint8_t* src, int src_stride); -// Return true if there is pending output rows ready. +// Export as many rows as possible. Return the numbers of rows written. +int WebPRescalerExport(WebPRescaler* const rescaler); + +// Return true if input is finished static WEBP_INLINE -int WebPRescalerHasPendingOutput(const WebPRescaler* const rescaler) { - return (rescaler->y_accum <= 0); +int WebPRescalerInputDone(const WebPRescaler* const rescaler) { + return (rescaler->src_y >= rescaler->src_height); +} +// Return true if output is finished +static WEBP_INLINE +int WebPRescalerOutputDone(const WebPRescaler* const rescaler) { + return (rescaler->dst_y >= rescaler->dst_height); } -// Export one row from rescaler. Returns the pointer where output was written, -// or NULL if no row was pending. -uint8_t* WebPRescalerExportRow(WebPRescaler* const wrk); - -// Export as many rows as possible. Return the numbers of rows written. -int WebPRescalerExport(WebPRescaler* const wrk); +// Return true if there are pending output rows ready. +static WEBP_INLINE +int WebPRescalerHasPendingOutput(const WebPRescaler* const rescaler) { + return !WebPRescalerOutputDone(rescaler) && (rescaler->y_accum <= 0); +} //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/utils/thread.c b/drivers/webp/utils/thread.c index ce89cf9dc7..93f7622797 100644 --- a/drivers/webp/utils/thread.c +++ b/drivers/webp/utils/thread.c @@ -1,27 +1,60 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Multi-threaded worker // // Author: Skal (pascal.massimino@gmail.com) -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - #include <assert.h> #include <string.h> // for memset() #include "./thread.h" +#include "./utils.h" + +#ifdef WEBP_USE_THREAD + +#if defined(_WIN32) + +#include <windows.h> +typedef HANDLE pthread_t; +typedef CRITICAL_SECTION pthread_mutex_t; -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { +#if _WIN32_WINNT >= 0x0600 // Windows Vista / Server 2008 or greater +#define USE_WINDOWS_CONDITION_VARIABLE +typedef CONDITION_VARIABLE pthread_cond_t; +#else +typedef struct { + HANDLE waiting_sem_; + HANDLE received_sem_; + HANDLE signal_event_; +} pthread_cond_t; +#endif // _WIN32_WINNT >= 0x600 + +#ifndef WINAPI_FAMILY_PARTITION +#define WINAPI_PARTITION_DESKTOP 1 +#define WINAPI_FAMILY_PARTITION(x) x #endif -#ifdef WEBP_USE_THREAD +#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) +#define USE_CREATE_THREAD +#endif + +#else // !_WIN32 + +#include <pthread.h> + +#endif // _WIN32 + +struct WebPWorkerImpl { + pthread_mutex_t mutex_; + pthread_cond_t condition_; + pthread_t thread_; +}; #if defined(_WIN32) @@ -34,15 +67,29 @@ extern "C" { #define THREADFN unsigned int __stdcall #define THREAD_RETURN(val) (unsigned int)((DWORD_PTR)val) +#if _WIN32_WINNT >= 0x0501 // Windows XP or greater +#define WaitForSingleObject(obj, timeout) \ + WaitForSingleObjectEx(obj, timeout, FALSE /*bAlertable*/) +#endif + static int pthread_create(pthread_t* const thread, const void* attr, unsigned int (__stdcall *start)(void*), void* arg) { (void)attr; +#ifdef USE_CREATE_THREAD + *thread = CreateThread(NULL, /* lpThreadAttributes */ + 0, /* dwStackSize */ + start, + arg, + 0, /* dwStackSize */ + NULL); /* lpThreadId */ +#else *thread = (pthread_t)_beginthreadex(NULL, /* void *security */ 0, /* unsigned stack_size */ start, arg, 0, /* unsigned initflag */ NULL); /* unsigned *thrdaddr */ +#endif if (*thread == NULL) return 1; SetThreadPriority(*thread, THREAD_PRIORITY_ABOVE_NORMAL); return 0; @@ -57,7 +104,11 @@ static int pthread_join(pthread_t thread, void** value_ptr) { // Mutex static int pthread_mutex_init(pthread_mutex_t* const mutex, void* mutexattr) { (void)mutexattr; +#if _WIN32_WINNT >= 0x0600 // Windows Vista / Server 2008 or greater + InitializeCriticalSectionEx(mutex, 0 /*dwSpinCount*/, 0 /*Flags*/); +#else InitializeCriticalSection(mutex); +#endif return 0; } @@ -79,14 +130,21 @@ static int pthread_mutex_destroy(pthread_mutex_t* const mutex) { // Condition static int pthread_cond_destroy(pthread_cond_t* const condition) { int ok = 1; +#ifdef USE_WINDOWS_CONDITION_VARIABLE + (void)condition; +#else ok &= (CloseHandle(condition->waiting_sem_) != 0); ok &= (CloseHandle(condition->received_sem_) != 0); ok &= (CloseHandle(condition->signal_event_) != 0); +#endif return !ok; } static int pthread_cond_init(pthread_cond_t* const condition, void* cond_attr) { (void)cond_attr; +#ifdef USE_WINDOWS_CONDITION_VARIABLE + InitializeConditionVariable(condition); +#else condition->waiting_sem_ = CreateSemaphore(NULL, 0, 1, NULL); condition->received_sem_ = CreateSemaphore(NULL, 0, 1, NULL); condition->signal_event_ = CreateEvent(NULL, FALSE, FALSE, NULL); @@ -96,11 +154,15 @@ static int pthread_cond_init(pthread_cond_t* const condition, void* cond_attr) { pthread_cond_destroy(condition); return 1; } +#endif return 0; } static int pthread_cond_signal(pthread_cond_t* const condition) { int ok = 1; +#ifdef USE_WINDOWS_CONDITION_VARIABLE + WakeConditionVariable(condition); +#else if (WaitForSingleObject(condition->waiting_sem_, 0) == WAIT_OBJECT_0) { // a thread is waiting in pthread_cond_wait: allow it to be notified ok = SetEvent(condition->signal_event_); @@ -109,12 +171,16 @@ static int pthread_cond_signal(pthread_cond_t* const condition) { ok &= (WaitForSingleObject(condition->received_sem_, INFINITE) != WAIT_OBJECT_0); } +#endif return !ok; } static int pthread_cond_wait(pthread_cond_t* const condition, pthread_mutex_t* const mutex) { int ok; +#ifdef USE_WINDOWS_CONDITION_VARIABLE + ok = SleepConditionVariableCS(condition, mutex, INFINITE); +#else // note that there is a consumer available so the signal isn't dropped in // pthread_cond_signal if (!ReleaseSemaphore(condition->waiting_sem_, 1, NULL)) @@ -125,123 +191,168 @@ static int pthread_cond_wait(pthread_cond_t* const condition, WAIT_OBJECT_0); ok &= ReleaseSemaphore(condition->received_sem_, 1, NULL); pthread_mutex_lock(mutex); +#endif return !ok; } -#else // _WIN32 +#else // !_WIN32 # define THREADFN void* # define THREAD_RETURN(val) val -#endif +#endif // _WIN32 //------------------------------------------------------------------------------ -static THREADFN WebPWorkerThreadLoop(void *ptr) { // thread loop +static void Execute(WebPWorker* const worker); // Forward declaration. + +static THREADFN ThreadLoop(void* ptr) { WebPWorker* const worker = (WebPWorker*)ptr; int done = 0; while (!done) { - pthread_mutex_lock(&worker->mutex_); + pthread_mutex_lock(&worker->impl_->mutex_); while (worker->status_ == OK) { // wait in idling mode - pthread_cond_wait(&worker->condition_, &worker->mutex_); + pthread_cond_wait(&worker->impl_->condition_, &worker->impl_->mutex_); } if (worker->status_ == WORK) { - if (worker->hook) { - worker->had_error |= !worker->hook(worker->data1, worker->data2); - } + Execute(worker); worker->status_ = OK; } else if (worker->status_ == NOT_OK) { // finish the worker done = 1; } // signal to the main thread that we're done (for Sync()) - pthread_cond_signal(&worker->condition_); - pthread_mutex_unlock(&worker->mutex_); + pthread_cond_signal(&worker->impl_->condition_); + pthread_mutex_unlock(&worker->impl_->mutex_); } return THREAD_RETURN(NULL); // Thread is finished } // main thread state control -static void WebPWorkerChangeState(WebPWorker* const worker, - WebPWorkerStatus new_status) { - // no-op when attempting to change state on a thread that didn't come up - if (worker->status_ < OK) return; - - pthread_mutex_lock(&worker->mutex_); - // wait for the worker to finish - while (worker->status_ != OK) { - pthread_cond_wait(&worker->condition_, &worker->mutex_); - } - // assign new status and release the working thread if needed - if (new_status != OK) { - worker->status_ = new_status; - pthread_cond_signal(&worker->condition_); +static void ChangeState(WebPWorker* const worker, + WebPWorkerStatus new_status) { + // No-op when attempting to change state on a thread that didn't come up. + // Checking status_ without acquiring the lock first would result in a data + // race. + if (worker->impl_ == NULL) return; + + pthread_mutex_lock(&worker->impl_->mutex_); + if (worker->status_ >= OK) { + // wait for the worker to finish + while (worker->status_ != OK) { + pthread_cond_wait(&worker->impl_->condition_, &worker->impl_->mutex_); + } + // assign new status and release the working thread if needed + if (new_status != OK) { + worker->status_ = new_status; + pthread_cond_signal(&worker->impl_->condition_); + } } - pthread_mutex_unlock(&worker->mutex_); + pthread_mutex_unlock(&worker->impl_->mutex_); } -#endif +#endif // WEBP_USE_THREAD //------------------------------------------------------------------------------ -void WebPWorkerInit(WebPWorker* const worker) { +static void Init(WebPWorker* const worker) { memset(worker, 0, sizeof(*worker)); worker->status_ = NOT_OK; } -int WebPWorkerSync(WebPWorker* const worker) { +static int Sync(WebPWorker* const worker) { #ifdef WEBP_USE_THREAD - WebPWorkerChangeState(worker, OK); + ChangeState(worker, OK); #endif assert(worker->status_ <= OK); return !worker->had_error; } -int WebPWorkerReset(WebPWorker* const worker) { +static int Reset(WebPWorker* const worker) { int ok = 1; worker->had_error = 0; if (worker->status_ < OK) { #ifdef WEBP_USE_THREAD - if (pthread_mutex_init(&worker->mutex_, NULL) || - pthread_cond_init(&worker->condition_, NULL)) { + worker->impl_ = (WebPWorkerImpl*)WebPSafeCalloc(1, sizeof(*worker->impl_)); + if (worker->impl_ == NULL) { return 0; } - pthread_mutex_lock(&worker->mutex_); - ok = !pthread_create(&worker->thread_, NULL, WebPWorkerThreadLoop, worker); + if (pthread_mutex_init(&worker->impl_->mutex_, NULL)) { + goto Error; + } + if (pthread_cond_init(&worker->impl_->condition_, NULL)) { + pthread_mutex_destroy(&worker->impl_->mutex_); + goto Error; + } + pthread_mutex_lock(&worker->impl_->mutex_); + ok = !pthread_create(&worker->impl_->thread_, NULL, ThreadLoop, worker); if (ok) worker->status_ = OK; - pthread_mutex_unlock(&worker->mutex_); + pthread_mutex_unlock(&worker->impl_->mutex_); + if (!ok) { + pthread_mutex_destroy(&worker->impl_->mutex_); + pthread_cond_destroy(&worker->impl_->condition_); + Error: + WebPSafeFree(worker->impl_); + worker->impl_ = NULL; + return 0; + } #else worker->status_ = OK; #endif } else if (worker->status_ > OK) { - ok = WebPWorkerSync(worker); + ok = Sync(worker); } assert(!ok || (worker->status_ == OK)); return ok; } -void WebPWorkerLaunch(WebPWorker* const worker) { +static void Execute(WebPWorker* const worker) { + if (worker->hook != NULL) { + worker->had_error |= !worker->hook(worker->data1, worker->data2); + } +} + +static void Launch(WebPWorker* const worker) { #ifdef WEBP_USE_THREAD - WebPWorkerChangeState(worker, WORK); + ChangeState(worker, WORK); #else - if (worker->hook) - worker->had_error |= !worker->hook(worker->data1, worker->data2); + Execute(worker); #endif } -void WebPWorkerEnd(WebPWorker* const worker) { - if (worker->status_ >= OK) { +static void End(WebPWorker* const worker) { #ifdef WEBP_USE_THREAD - WebPWorkerChangeState(worker, NOT_OK); - pthread_join(worker->thread_, NULL); - pthread_mutex_destroy(&worker->mutex_); - pthread_cond_destroy(&worker->condition_); + if (worker->impl_ != NULL) { + ChangeState(worker, NOT_OK); + pthread_join(worker->impl_->thread_, NULL); + pthread_mutex_destroy(&worker->impl_->mutex_); + pthread_cond_destroy(&worker->impl_->condition_); + WebPSafeFree(worker->impl_); + worker->impl_ = NULL; + } #else - worker->status_ = NOT_OK; + worker->status_ = NOT_OK; + assert(worker->impl_ == NULL); #endif - } assert(worker->status_ == NOT_OK); } //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif +static WebPWorkerInterface g_worker_interface = { + Init, Reset, Sync, Launch, Execute, End +}; + +int WebPSetWorkerInterface(const WebPWorkerInterface* const winterface) { + if (winterface == NULL || + winterface->Init == NULL || winterface->Reset == NULL || + winterface->Sync == NULL || winterface->Launch == NULL || + winterface->Execute == NULL || winterface->End == NULL) { + return 0; + } + g_worker_interface = *winterface; + return 1; +} + +const WebPWorkerInterface* WebPGetWorkerInterface(void) { + return &g_worker_interface; +} + +//------------------------------------------------------------------------------ diff --git a/drivers/webp/utils/thread.h b/drivers/webp/utils/thread.h index 3191890b76..8408311855 100644 --- a/drivers/webp/utils/thread.h +++ b/drivers/webp/utils/thread.h @@ -1,8 +1,10 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Multi-threaded worker @@ -12,29 +14,15 @@ #ifndef WEBP_UTILS_THREAD_H_ #define WEBP_UTILS_THREAD_H_ -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" #endif -#if WEBP_USE_THREAD - -#if defined(_WIN32) - -#include <windows.h> -typedef HANDLE pthread_t; -typedef CRITICAL_SECTION pthread_mutex_t; -typedef struct { - HANDLE waiting_sem_; - HANDLE received_sem_; - HANDLE signal_event_; -} pthread_cond_t; +#include "../webp/types.h" -#else - -#include <pthread.h> - -#endif /* _WIN32 */ -#endif /* WEBP_USE_THREAD */ +#ifdef __cplusplus +extern "C" { +#endif // State of the worker thread object typedef enum { @@ -47,13 +35,12 @@ typedef enum { // arguments (data1 and data2), and should return false in case of error. typedef int (*WebPWorkerHook)(void*, void*); -// Synchronize object used to launch job in the worker thread +// Platform-dependent implementation details for the worker. +typedef struct WebPWorkerImpl WebPWorkerImpl; + +// Synchronization object used to launch job in the worker thread typedef struct { -#if WEBP_USE_THREAD - pthread_mutex_t mutex_; - pthread_cond_t condition_; - pthread_t thread_; -#endif + WebPWorkerImpl* impl_; WebPWorkerStatus status_; WebPWorkerHook hook; // hook to call void* data1; // first argument passed to 'hook' @@ -61,25 +48,45 @@ typedef struct { int had_error; // return value of the last call to 'hook' } WebPWorker; -// Must be called first, before any other method. -void WebPWorkerInit(WebPWorker* const worker); -// Must be called initialize the object and spawn the thread. Re-entrant. -// Will potentially launch the thread. Returns false in case of error. -int WebPWorkerReset(WebPWorker* const worker); -// Make sure the previous work is finished. Returns true if worker->had_error -// was not set and not error condition was triggered by the working thread. -int WebPWorkerSync(WebPWorker* const worker); -// Trigger the thread to call hook() with data1 and data2 argument. These -// hook/data1/data2 can be changed at any time before calling this function, -// but not be changed afterward until the next call to WebPWorkerSync(). -void WebPWorkerLaunch(WebPWorker* const worker); -// Kill the thread and terminate the object. To use the object again, one -// must call WebPWorkerReset() again. -void WebPWorkerEnd(WebPWorker* const worker); +// The interface for all thread-worker related functions. All these functions +// must be implemented. +typedef struct { + // Must be called first, before any other method. + void (*Init)(WebPWorker* const worker); + // Must be called to initialize the object and spawn the thread. Re-entrant. + // Will potentially launch the thread. Returns false in case of error. + int (*Reset)(WebPWorker* const worker); + // Makes sure the previous work is finished. Returns true if worker->had_error + // was not set and no error condition was triggered by the working thread. + int (*Sync)(WebPWorker* const worker); + // Triggers the thread to call hook() with data1 and data2 arguments. These + // hook/data1/data2 values can be changed at any time before calling this + // function, but not be changed afterward until the next call to Sync(). + void (*Launch)(WebPWorker* const worker); + // This function is similar to Launch() except that it calls the + // hook directly instead of using a thread. Convenient to bypass the thread + // mechanism while still using the WebPWorker structs. Sync() must + // still be called afterward (for error reporting). + void (*Execute)(WebPWorker* const worker); + // Kill the thread and terminate the object. To use the object again, one + // must call Reset() again. + void (*End)(WebPWorker* const worker); +} WebPWorkerInterface; + +// Install a new set of threading functions, overriding the defaults. This +// should be done before any workers are started, i.e., before any encoding or +// decoding takes place. The contents of the interface struct are copied, it +// is safe to free the corresponding memory after this call. This function is +// not thread-safe. Return false in case of invalid pointer or methods. +WEBP_EXTERN(int) WebPSetWorkerInterface( + const WebPWorkerInterface* const winterface); + +// Retrieve the currently set thread worker interface. +WEBP_EXTERN(const WebPWorkerInterface*) WebPGetWorkerInterface(void); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webp/utils/utils.c b/drivers/webp/utils/utils.c index 673b7e284c..d8e30930af 100644 --- a/drivers/webp/utils/utils.c +++ b/drivers/webp/utils/utils.c @@ -1,8 +1,10 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Misc. common utility functions @@ -10,35 +12,228 @@ // Author: Skal (pascal.massimino@gmail.com) #include <stdlib.h> +#include <string.h> // for memcpy() +#include "../webp/decode.h" +#include "../webp/encode.h" #include "./utils.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +// If PRINT_MEM_INFO is defined, extra info (like total memory used, number of +// alloc/free etc) is printed. For debugging/tuning purpose only (it's slow, +// and not multi-thread safe!). +// An interesting alternative is valgrind's 'massif' tool: +// http://valgrind.org/docs/manual/ms-manual.html +// Here is an example command line: +/* valgrind --tool=massif --massif-out-file=massif.out \ + --stacks=yes --alloc-fn=WebPSafeAlloc --alloc-fn=WebPSafeCalloc + ms_print massif.out +*/ +// In addition: +// * if PRINT_MEM_TRAFFIC is defined, all the details of the malloc/free cycles +// are printed. +// * if MALLOC_FAIL_AT is defined, the global environment variable +// $MALLOC_FAIL_AT is used to simulate a memory error when calloc or malloc +// is called for the nth time. Example usage: +// export MALLOC_FAIL_AT=50 && ./examples/cwebp input.png +// * if MALLOC_LIMIT is defined, the global environment variable $MALLOC_LIMIT +// sets the maximum amount of memory (in bytes) made available to libwebp. +// This can be used to emulate environment with very limited memory. +// Example: export MALLOC_LIMIT=64000000 && ./examples/dwebp picture.webp + +// #define PRINT_MEM_INFO +// #define PRINT_MEM_TRAFFIC +// #define MALLOC_FAIL_AT +// #define MALLOC_LIMIT //------------------------------------------------------------------------------ // Checked memory allocation -static int CheckSizeArguments(uint64_t nmemb, size_t size) { +#if defined(PRINT_MEM_INFO) + +#include <stdio.h> + +static int num_malloc_calls = 0; +static int num_calloc_calls = 0; +static int num_free_calls = 0; +static int countdown_to_fail = 0; // 0 = off + +typedef struct MemBlock MemBlock; +struct MemBlock { + void* ptr_; + size_t size_; + MemBlock* next_; +}; + +static MemBlock* all_blocks = NULL; +static size_t total_mem = 0; +static size_t total_mem_allocated = 0; +static size_t high_water_mark = 0; +static size_t mem_limit = 0; + +static int exit_registered = 0; + +static void PrintMemInfo(void) { + fprintf(stderr, "\nMEMORY INFO:\n"); + fprintf(stderr, "num calls to: malloc = %4d\n", num_malloc_calls); + fprintf(stderr, " calloc = %4d\n", num_calloc_calls); + fprintf(stderr, " free = %4d\n", num_free_calls); + fprintf(stderr, "total_mem: %u\n", (uint32_t)total_mem); + fprintf(stderr, "total_mem allocated: %u\n", (uint32_t)total_mem_allocated); + fprintf(stderr, "high-water mark: %u\n", (uint32_t)high_water_mark); + while (all_blocks != NULL) { + MemBlock* b = all_blocks; + all_blocks = b->next_; + free(b); + } +} + +static void Increment(int* const v) { + if (!exit_registered) { +#if defined(MALLOC_FAIL_AT) + { + const char* const malloc_fail_at_str = getenv("MALLOC_FAIL_AT"); + if (malloc_fail_at_str != NULL) { + countdown_to_fail = atoi(malloc_fail_at_str); + } + } +#endif +#if defined(MALLOC_LIMIT) + { + const char* const malloc_limit_str = getenv("MALLOC_LIMIT"); + if (malloc_limit_str != NULL) { + mem_limit = atoi(malloc_limit_str); + } + } +#endif + (void)countdown_to_fail; + (void)mem_limit; + atexit(PrintMemInfo); + exit_registered = 1; + } + ++*v; +} + +static void AddMem(void* ptr, size_t size) { + if (ptr != NULL) { + MemBlock* const b = (MemBlock*)malloc(sizeof(*b)); + if (b == NULL) abort(); + b->next_ = all_blocks; + all_blocks = b; + b->ptr_ = ptr; + b->size_ = size; + total_mem += size; + total_mem_allocated += size; +#if defined(PRINT_MEM_TRAFFIC) +#if defined(MALLOC_FAIL_AT) + fprintf(stderr, "fail-count: %5d [mem=%u]\n", + num_malloc_calls + num_calloc_calls, (uint32_t)total_mem); +#else + fprintf(stderr, "Mem: %u (+%u)\n", (uint32_t)total_mem, (uint32_t)size); +#endif +#endif + if (total_mem > high_water_mark) high_water_mark = total_mem; + } +} + +static void SubMem(void* ptr) { + if (ptr != NULL) { + MemBlock** b = &all_blocks; + // Inefficient search, but that's just for debugging. + while (*b != NULL && (*b)->ptr_ != ptr) b = &(*b)->next_; + if (*b == NULL) { + fprintf(stderr, "Invalid pointer free! (%p)\n", ptr); + abort(); + } + { + MemBlock* const block = *b; + *b = block->next_; + total_mem -= block->size_; +#if defined(PRINT_MEM_TRAFFIC) + fprintf(stderr, "Mem: %u (-%u)\n", + (uint32_t)total_mem, (uint32_t)block->size_); +#endif + free(block); + } + } +} + +#else +#define Increment(v) do {} while (0) +#define AddMem(p, s) do {} while (0) +#define SubMem(p) do {} while (0) +#endif + +// Returns 0 in case of overflow of nmemb * size. +static int CheckSizeArgumentsOverflow(uint64_t nmemb, size_t size) { const uint64_t total_size = nmemb * size; if (nmemb == 0) return 1; if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0; if (total_size != (size_t)total_size) return 0; +#if defined(PRINT_MEM_INFO) && defined(MALLOC_FAIL_AT) + if (countdown_to_fail > 0 && --countdown_to_fail == 0) { + return 0; // fake fail! + } +#endif +#if defined(MALLOC_LIMIT) + if (mem_limit > 0 && total_mem + total_size >= mem_limit) { + return 0; // fake fail! + } +#endif + return 1; } void* WebPSafeMalloc(uint64_t nmemb, size_t size) { - if (!CheckSizeArguments(nmemb, size)) return NULL; - return malloc((size_t)(nmemb * size)); + void* ptr; + Increment(&num_malloc_calls); + if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; + assert(nmemb * size > 0); + ptr = malloc((size_t)(nmemb * size)); + AddMem(ptr, (size_t)(nmemb * size)); + return ptr; } void* WebPSafeCalloc(uint64_t nmemb, size_t size) { - if (!CheckSizeArguments(nmemb, size)) return NULL; - return calloc((size_t)nmemb, size); + void* ptr; + Increment(&num_calloc_calls); + if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; + assert(nmemb * size > 0); + ptr = calloc((size_t)nmemb, size); + AddMem(ptr, (size_t)(nmemb * size)); + return ptr; +} + +void WebPSafeFree(void* const ptr) { + if (ptr != NULL) { + Increment(&num_free_calls); + SubMem(ptr); + } + free(ptr); +} + +// Public API function. +void WebPFree(void* ptr) { + free(ptr); } //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif +void WebPCopyPlane(const uint8_t* src, int src_stride, + uint8_t* dst, int dst_stride, int width, int height) { + assert(src != NULL && dst != NULL); + assert(src_stride >= width && dst_stride >= width); + while (height-- > 0) { + memcpy(dst, src, width); + src += src_stride; + dst += dst_stride; + } +} + +void WebPCopyPixels(const WebPPicture* const src, WebPPicture* const dst) { + assert(src != NULL && dst != NULL); + assert(src->width == dst->width && src->height == dst->height); + assert(src->use_argb && dst->use_argb); + WebPCopyPlane((uint8_t*)src->argb, 4 * src->argb_stride, (uint8_t*)dst->argb, + 4 * dst->argb_stride, 4 * src->width, src->height); +} + +//------------------------------------------------------------------------------ diff --git a/drivers/webp/utils/utils.h b/drivers/webp/utils/utils.h index 316ac90612..fcdb7e139b 100644 --- a/drivers/webp/utils/utils.h +++ b/drivers/webp/utils/utils.h @@ -1,20 +1,25 @@ // Copyright 2012 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Misc. common utility functions // -// Author: Skal (pascal.massimino@gmail.com) +// Authors: Skal (pascal.massimino@gmail.com) +// Urvang (urvang@google.com) #ifndef WEBP_UTILS_UTILS_H_ #define WEBP_UTILS_UTILS_H_ -#include "../types.h" +#include <assert.h> -#if defined(__cplusplus) || defined(c_plusplus) +#include "../webp/types.h" + +#ifdef __cplusplus extern "C" { #endif @@ -30,14 +35,107 @@ extern "C" { // somewhere (like: malloc(num_pixels * sizeof(*something))). That's why this // safe malloc() borrows the signature from calloc(), pointing at the dangerous // underlying multiply involved. -void* WebPSafeMalloc(uint64_t nmemb, size_t size); +WEBP_EXTERN(void*) WebPSafeMalloc(uint64_t nmemb, size_t size); // Note that WebPSafeCalloc() expects the second argument type to be 'size_t' // in order to favor the "calloc(num_foo, sizeof(foo))" pattern. -void* WebPSafeCalloc(uint64_t nmemb, size_t size); +WEBP_EXTERN(void*) WebPSafeCalloc(uint64_t nmemb, size_t size); + +// Companion deallocation function to the above allocations. +WEBP_EXTERN(void) WebPSafeFree(void* const ptr); + +//------------------------------------------------------------------------------ +// Alignment + +#define WEBP_ALIGN_CST 31 +#define WEBP_ALIGN(PTR) ((uintptr_t)((PTR) + WEBP_ALIGN_CST) & ~WEBP_ALIGN_CST) + +//------------------------------------------------------------------------------ +// Reading/writing data. + +// Read 16, 24 or 32 bits stored in little-endian order. +static WEBP_INLINE int GetLE16(const uint8_t* const data) { + return (int)(data[0] << 0) | (data[1] << 8); +} + +static WEBP_INLINE int GetLE24(const uint8_t* const data) { + return GetLE16(data) | (data[2] << 16); +} + +static WEBP_INLINE uint32_t GetLE32(const uint8_t* const data) { + return GetLE16(data) | ((uint32_t)GetLE16(data + 2) << 16); +} + +// Store 16, 24 or 32 bits in little-endian order. +static WEBP_INLINE void PutLE16(uint8_t* const data, int val) { + assert(val < (1 << 16)); + data[0] = (val >> 0); + data[1] = (val >> 8); +} + +static WEBP_INLINE void PutLE24(uint8_t* const data, int val) { + assert(val < (1 << 24)); + PutLE16(data, val & 0xffff); + data[2] = (val >> 16); +} + +static WEBP_INLINE void PutLE32(uint8_t* const data, uint32_t val) { + PutLE16(data, (int)(val & 0xffff)); + PutLE16(data + 2, (int)(val >> 16)); +} + +// Returns (int)floor(log2(n)). n must be > 0. +// use GNU builtins where available. +#if defined(__GNUC__) && \ + ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4) +static WEBP_INLINE int BitsLog2Floor(uint32_t n) { + return 31 ^ __builtin_clz(n); +} +#elif defined(_MSC_VER) && _MSC_VER > 1310 && \ + (defined(_M_X64) || defined(_M_IX86)) +#include <intrin.h> +#pragma intrinsic(_BitScanReverse) + +static WEBP_INLINE int BitsLog2Floor(uint32_t n) { + unsigned long first_set_bit; + _BitScanReverse(&first_set_bit, n); + return first_set_bit; +} +#else +static WEBP_INLINE int BitsLog2Floor(uint32_t n) { + int log = 0; + uint32_t value = n; + int i; + + for (i = 4; i >= 0; --i) { + const int shift = (1 << i); + const uint32_t x = value >> shift; + if (x != 0) { + value = x; + log += shift; + } + } + return log; +} +#endif + +//------------------------------------------------------------------------------ +// Pixel copying. + +struct WebPPicture; + +// Copy width x height pixels from 'src' to 'dst' honoring the strides. +WEBP_EXTERN(void) WebPCopyPlane(const uint8_t* src, int src_stride, + uint8_t* dst, int dst_stride, + int width, int height); + +// Copy ARGB pixels from 'src' to 'dst' honoring strides. 'src' and 'dst' are +// assumed to be already allocated and using ARGB data. +WEBP_EXTERN(void) WebPCopyPixels(const struct WebPPicture* const src, + struct WebPPicture* const dst); //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) +#ifdef __cplusplus } // extern "C" #endif diff --git a/drivers/webpold/SCsub b/drivers/webpold/SCsub new file mode 100644 index 0000000000..5596edbe09 --- /dev/null +++ b/drivers/webpold/SCsub @@ -0,0 +1,63 @@ +Import('env') + + +webp_sources = [ + "webp/mux/muxedit.c", + "webp/mux/muxread.c", + "webp/mux/muxinternal.c", + "webp/mux/demux.c", + "webp/enc/tree.c", + "webp/enc/analysis.c", + "webp/enc/backward_references.c", + "webp/enc/alpha.c", + "webp/enc/picture.c", + "webp/enc/frame.c", + "webp/enc/webpenc.c", + "webp/enc/cost.c", + "webp/enc/filter.c", + "webp/enc/vp8l.c", + "webp/enc/quant.c", + "webp/enc/histogram.c", + "webp/enc/syntax.c", + "webp/enc/config.c", + "webp/enc/layer.c", + "webp/enc/iterator.c", + "webp/dsp/dec_sse2.c", + "webp/dsp/upsampling_sse2.c", + "webp/dsp/dec_neon.c", + "webp/dsp/enc.c", + "webp/dsp/enc_sse2.c", + "webp/dsp/upsampling.c", + "webp/dsp/lossless.c", + "webp/dsp/cpu.c", + "webp/dsp/dec.c", + "webp/dsp/yuv.c", + "webp/utils/bit_reader.c", + "webp/utils/filters.c", + "webp/utils/bit_writer.c", + "webp/utils/thread.c", + "webp/utils/quant_levels.c", + "webp/utils/color_cache.c", + "webp/utils/rescaler.c", + "webp/utils/utils.c", + "webp/utils/huffman.c", + "webp/utils/huffman_encode.c", + "webp/dec/tree.c", + "webp/dec/alpha.c", + "webp/dec/frame.c", + "webp/dec/vp8l.c", + "webp/dec/vp8.c", + "webp/dec/quant.c", + "webp/dec/webp.c", + "webp/dec/buffer.c", + "webp/dec/io.c", + "webp/dec/layer.c", + "webp/dec/idec.c", + "webp/image_loader_webp.cpp" +] + +env.drivers_sources+=webp_sources + +#env.add_source_files(env.drivers_sources, webp_sources) + +Export('env') diff --git a/drivers/webpold/dec/alpha.c b/drivers/webpold/dec/alpha.c new file mode 100644 index 0000000000..d1095fa555 --- /dev/null +++ b/drivers/webpold/dec/alpha.c @@ -0,0 +1,140 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Alpha-plane decompression. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> +#include "./vp8i.h" +#include "./vp8li.h" +#include "../utils/filters.h" +#include "../utils/quant_levels.h" +#include "../format_constants.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// TODO(skal): move to dsp/ ? +static void CopyPlane(const uint8_t* src, int src_stride, + uint8_t* dst, int dst_stride, int width, int height) { + while (height-- > 0) { + memcpy(dst, src, width); + src += src_stride; + dst += dst_stride; + } +} + +//------------------------------------------------------------------------------ +// Decodes the compressed data 'data' of size 'data_size' into the 'output'. +// The 'output' buffer should be pre-allocated and must be of the same +// dimension 'height'x'stride', as that of the image. +// +// Returns 1 on successfully decoding the compressed alpha and +// 0 if either: +// error in bit-stream header (invalid compression mode or filter), or +// error returned by appropriate compression method. + +static int DecodeAlpha(const uint8_t* data, size_t data_size, + int width, int height, int stride, uint8_t* output) { + uint8_t* decoded_data = NULL; + const size_t decoded_size = height * width; + uint8_t* unfiltered_data = NULL; + WEBP_FILTER_TYPE filter; + int pre_processing; + int rsrv; + int ok = 0; + int method; + + assert(width > 0 && height > 0 && stride >= width); + assert(data != NULL && output != NULL); + + if (data_size <= ALPHA_HEADER_LEN) { + return 0; + } + + method = (data[0] >> 0) & 0x03; + filter = (data[0] >> 2) & 0x03; + pre_processing = (data[0] >> 4) & 0x03; + rsrv = (data[0] >> 6) & 0x03; + if (method < ALPHA_NO_COMPRESSION || + method > ALPHA_LOSSLESS_COMPRESSION || + filter >= WEBP_FILTER_LAST || + pre_processing > ALPHA_PREPROCESSED_LEVELS || + rsrv != 0) { + return 0; + } + + if (method == ALPHA_NO_COMPRESSION) { + ok = (data_size >= decoded_size); + decoded_data = (uint8_t*)data + ALPHA_HEADER_LEN; + } else { + decoded_data = (uint8_t*)malloc(decoded_size); + if (decoded_data == NULL) return 0; + ok = VP8LDecodeAlphaImageStream(width, height, + data + ALPHA_HEADER_LEN, + data_size - ALPHA_HEADER_LEN, + decoded_data); + } + + if (ok) { + WebPFilterFunc unfilter_func = WebPUnfilters[filter]; + if (unfilter_func != NULL) { + unfiltered_data = (uint8_t*)malloc(decoded_size); + if (unfiltered_data == NULL) { + ok = 0; + goto Error; + } + // TODO(vikas): Implement on-the-fly decoding & filter mechanism to decode + // and apply filter per image-row. + unfilter_func(decoded_data, width, height, 1, width, unfiltered_data); + // Construct raw_data (height x stride) from alpha data (height x width). + CopyPlane(unfiltered_data, width, output, stride, width, height); + free(unfiltered_data); + } else { + // Construct raw_data (height x stride) from alpha data (height x width). + CopyPlane(decoded_data, width, output, stride, width, height); + } + if (pre_processing == ALPHA_PREPROCESSED_LEVELS) { + ok = DequantizeLevels(decoded_data, width, height); + } + } + + Error: + if (method != ALPHA_NO_COMPRESSION) { + free(decoded_data); + } + return ok; +} + +//------------------------------------------------------------------------------ + +const uint8_t* VP8DecompressAlphaRows(VP8Decoder* const dec, + int row, int num_rows) { + const int stride = dec->pic_hdr_.width_; + + if (row < 0 || num_rows < 0 || row + num_rows > dec->pic_hdr_.height_) { + return NULL; // sanity check. + } + + if (row == 0) { + // Decode everything during the first call. + if (!DecodeAlpha(dec->alpha_data_, (size_t)dec->alpha_data_size_, + dec->pic_hdr_.width_, dec->pic_hdr_.height_, stride, + dec->alpha_plane_)) { + return NULL; // Error. + } + } + + // Return a pointer to the current decoded row. + return dec->alpha_plane_ + row * stride; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/buffer.c b/drivers/webpold/dec/buffer.c new file mode 100644 index 0000000000..c159f6f248 --- /dev/null +++ b/drivers/webpold/dec/buffer.c @@ -0,0 +1,215 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Everything about WebPDecBuffer +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> + +#include "./vp8i.h" +#include "./webpi.h" +#include "../utils/utils.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// WebPDecBuffer + +// Number of bytes per pixel for the different color-spaces. +static const int kModeBpp[MODE_LAST] = { + 3, 4, 3, 4, 4, 2, 2, + 4, 4, 4, 2, // pre-multiplied modes + 1, 1 }; + +// Check that webp_csp_mode is within the bounds of WEBP_CSP_MODE. +// Convert to an integer to handle both the unsigned/signed enum cases +// without the need for casting to remove type limit warnings. +static int IsValidColorspace(int webp_csp_mode) { + return (webp_csp_mode >= MODE_RGB && webp_csp_mode < MODE_LAST); +} + +static VP8StatusCode CheckDecBuffer(const WebPDecBuffer* const buffer) { + int ok = 1; + const WEBP_CSP_MODE mode = buffer->colorspace; + const int width = buffer->width; + const int height = buffer->height; + if (!IsValidColorspace(mode)) { + ok = 0; + } else if (!WebPIsRGBMode(mode)) { // YUV checks + const WebPYUVABuffer* const buf = &buffer->u.YUVA; + const uint64_t y_size = (uint64_t)buf->y_stride * height; + const uint64_t u_size = (uint64_t)buf->u_stride * ((height + 1) / 2); + const uint64_t v_size = (uint64_t)buf->v_stride * ((height + 1) / 2); + const uint64_t a_size = (uint64_t)buf->a_stride * height; + ok &= (y_size <= buf->y_size); + ok &= (u_size <= buf->u_size); + ok &= (v_size <= buf->v_size); + ok &= (buf->y_stride >= width); + ok &= (buf->u_stride >= (width + 1) / 2); + ok &= (buf->v_stride >= (width + 1) / 2); + ok &= (buf->y != NULL); + ok &= (buf->u != NULL); + ok &= (buf->v != NULL); + if (mode == MODE_YUVA) { + ok &= (buf->a_stride >= width); + ok &= (a_size <= buf->a_size); + ok &= (buf->a != NULL); + } + } else { // RGB checks + const WebPRGBABuffer* const buf = &buffer->u.RGBA; + const uint64_t size = (uint64_t)buf->stride * height; + ok &= (size <= buf->size); + ok &= (buf->stride >= width * kModeBpp[mode]); + ok &= (buf->rgba != NULL); + } + return ok ? VP8_STATUS_OK : VP8_STATUS_INVALID_PARAM; +} + +static VP8StatusCode AllocateBuffer(WebPDecBuffer* const buffer) { + const int w = buffer->width; + const int h = buffer->height; + const WEBP_CSP_MODE mode = buffer->colorspace; + + if (w <= 0 || h <= 0 || !IsValidColorspace(mode)) { + return VP8_STATUS_INVALID_PARAM; + } + + if (!buffer->is_external_memory && buffer->private_memory == NULL) { + uint8_t* output; + int uv_stride = 0, a_stride = 0; + uint64_t uv_size = 0, a_size = 0, total_size; + // We need memory and it hasn't been allocated yet. + // => initialize output buffer, now that dimensions are known. + const int stride = w * kModeBpp[mode]; + const uint64_t size = (uint64_t)stride * h; + + if (!WebPIsRGBMode(mode)) { + uv_stride = (w + 1) / 2; + uv_size = (uint64_t)uv_stride * ((h + 1) / 2); + if (mode == MODE_YUVA) { + a_stride = w; + a_size = (uint64_t)a_stride * h; + } + } + total_size = size + 2 * uv_size + a_size; + + // Security/sanity checks + output = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*output)); + if (output == NULL) { + return VP8_STATUS_OUT_OF_MEMORY; + } + buffer->private_memory = output; + + if (!WebPIsRGBMode(mode)) { // YUVA initialization + WebPYUVABuffer* const buf = &buffer->u.YUVA; + buf->y = output; + buf->y_stride = stride; + buf->y_size = (size_t)size; + buf->u = output + size; + buf->u_stride = uv_stride; + buf->u_size = (size_t)uv_size; + buf->v = output + size + uv_size; + buf->v_stride = uv_stride; + buf->v_size = (size_t)uv_size; + if (mode == MODE_YUVA) { + buf->a = output + size + 2 * uv_size; + } + buf->a_size = (size_t)a_size; + buf->a_stride = a_stride; + } else { // RGBA initialization + WebPRGBABuffer* const buf = &buffer->u.RGBA; + buf->rgba = output; + buf->stride = stride; + buf->size = (size_t)size; + } + } + return CheckDecBuffer(buffer); +} + +VP8StatusCode WebPAllocateDecBuffer(int w, int h, + const WebPDecoderOptions* const options, + WebPDecBuffer* const out) { + if (out == NULL || w <= 0 || h <= 0) { + return VP8_STATUS_INVALID_PARAM; + } + if (options != NULL) { // First, apply options if there is any. + if (options->use_cropping) { + const int cw = options->crop_width; + const int ch = options->crop_height; + const int x = options->crop_left & ~1; + const int y = options->crop_top & ~1; + if (x < 0 || y < 0 || cw <= 0 || ch <= 0 || x + cw > w || y + ch > h) { + return VP8_STATUS_INVALID_PARAM; // out of frame boundary. + } + w = cw; + h = ch; + } + if (options->use_scaling) { + if (options->scaled_width <= 0 || options->scaled_height <= 0) { + return VP8_STATUS_INVALID_PARAM; + } + w = options->scaled_width; + h = options->scaled_height; + } + } + out->width = w; + out->height = h; + + // Then, allocate buffer for real + return AllocateBuffer(out); +} + +//------------------------------------------------------------------------------ +// constructors / destructors + +int WebPInitDecBufferInternal(WebPDecBuffer* buffer, int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_DECODER_ABI_VERSION)) { + return 0; // version mismatch + } + if (buffer == NULL) return 0; + memset(buffer, 0, sizeof(*buffer)); + return 1; +} + +void WebPFreeDecBuffer(WebPDecBuffer* buffer) { + if (buffer != NULL) { + if (!buffer->is_external_memory) + free(buffer->private_memory); + buffer->private_memory = NULL; + } +} + +void WebPCopyDecBuffer(const WebPDecBuffer* const src, + WebPDecBuffer* const dst) { + if (src != NULL && dst != NULL) { + *dst = *src; + if (src->private_memory != NULL) { + dst->is_external_memory = 1; // dst buffer doesn't own the memory. + dst->private_memory = NULL; + } + } +} + +// Copy and transfer ownership from src to dst (beware of parameter order!) +void WebPGrabDecBuffer(WebPDecBuffer* const src, WebPDecBuffer* const dst) { + if (src != NULL && dst != NULL) { + *dst = *src; + if (src->private_memory != NULL) { + src->is_external_memory = 1; // src relinquishes ownership + src->private_memory = NULL; + } + } +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/decode_vp8.h b/drivers/webpold/dec/decode_vp8.h new file mode 100644 index 0000000000..c26a9fc891 --- /dev/null +++ b/drivers/webpold/dec/decode_vp8.h @@ -0,0 +1,182 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Low-level API for VP8 decoder +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_WEBP_DECODE_VP8_H_ +#define WEBP_WEBP_DECODE_VP8_H_ + +#include "../decode.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Lower-level API +// +// These functions provide fine-grained control of the decoding process. +// The call flow should resemble: +// +// VP8Io io; +// VP8InitIo(&io); +// io.data = data; +// io.data_size = size; +// /* customize io's functions (setup()/put()/teardown()) if needed. */ +// +// VP8Decoder* dec = VP8New(); +// bool ok = VP8Decode(dec); +// if (!ok) printf("Error: %s\n", VP8StatusMessage(dec)); +// VP8Delete(dec); +// return ok; + +// Input / Output +typedef struct VP8Io VP8Io; +typedef int (*VP8IoPutHook)(const VP8Io* io); +typedef int (*VP8IoSetupHook)(VP8Io* io); +typedef void (*VP8IoTeardownHook)(const VP8Io* io); + +struct VP8Io { + // set by VP8GetHeaders() + int width, height; // picture dimensions, in pixels (invariable). + // These are the original, uncropped dimensions. + // The actual area passed to put() is stored + // in mb_w / mb_h fields. + + // set before calling put() + int mb_y; // position of the current rows (in pixels) + int mb_w; // number of columns in the sample + int mb_h; // number of rows in the sample + const uint8_t* y, *u, *v; // rows to copy (in yuv420 format) + int y_stride; // row stride for luma + int uv_stride; // row stride for chroma + + void* opaque; // user data + + // called when fresh samples are available. Currently, samples are in + // YUV420 format, and can be up to width x 24 in size (depending on the + // in-loop filtering level, e.g.). Should return false in case of error + // or abort request. The actual size of the area to update is mb_w x mb_h + // in size, taking cropping into account. + VP8IoPutHook put; + + // called just before starting to decode the blocks. + // Must return false in case of setup error, true otherwise. If false is + // returned, teardown() will NOT be called. But if the setup succeeded + // and true is returned, then teardown() will always be called afterward. + VP8IoSetupHook setup; + + // Called just after block decoding is finished (or when an error occurred + // during put()). Is NOT called if setup() failed. + VP8IoTeardownHook teardown; + + // this is a recommendation for the user-side yuv->rgb converter. This flag + // is set when calling setup() hook and can be overwritten by it. It then + // can be taken into consideration during the put() method. + int fancy_upsampling; + + // Input buffer. + size_t data_size; + const uint8_t* data; + + // If true, in-loop filtering will not be performed even if present in the + // bitstream. Switching off filtering may speed up decoding at the expense + // of more visible blocking. Note that output will also be non-compliant + // with the VP8 specifications. + int bypass_filtering; + + // Cropping parameters. + int use_cropping; + int crop_left, crop_right, crop_top, crop_bottom; + + // Scaling parameters. + int use_scaling; + int scaled_width, scaled_height; + + // If non NULL, pointer to the alpha data (if present) corresponding to the + // start of the current row (That is: it is pre-offset by mb_y and takes + // cropping into account). + const uint8_t* a; +}; + +// Internal, version-checked, entry point +int VP8InitIoInternal(VP8Io* const, int); + +// Set the custom IO function pointers and user-data. The setter for IO hooks +// should be called before initiating incremental decoding. Returns true if +// WebPIDecoder object is successfully modified, false otherwise. +int WebPISetIOHooks(WebPIDecoder* const idec, + VP8IoPutHook put, + VP8IoSetupHook setup, + VP8IoTeardownHook teardown, + void* user_data); + +// Main decoding object. This is an opaque structure. +typedef struct VP8Decoder VP8Decoder; + +// Create a new decoder object. +VP8Decoder* VP8New(void); + +// Must be called to make sure 'io' is initialized properly. +// Returns false in case of version mismatch. Upon such failure, no other +// decoding function should be called (VP8Decode, VP8GetHeaders, ...) +static WEBP_INLINE int VP8InitIo(VP8Io* const io) { + return VP8InitIoInternal(io, WEBP_DECODER_ABI_VERSION); +} + +// Start decoding a new picture. Returns true if ok. +int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io); + +// Decode a picture. Will call VP8GetHeaders() if it wasn't done already. +// Returns false in case of error. +int VP8Decode(VP8Decoder* const dec, VP8Io* const io); + +// Return current status of the decoder: +VP8StatusCode VP8Status(VP8Decoder* const dec); + +// return readable string corresponding to the last status. +const char* VP8StatusMessage(VP8Decoder* const dec); + +// Resets the decoder in its initial state, reclaiming memory. +// Not a mandatory call between calls to VP8Decode(). +void VP8Clear(VP8Decoder* const dec); + +// Destroy the decoder object. +void VP8Delete(VP8Decoder* const dec); + +//------------------------------------------------------------------------------ +// Miscellaneous VP8/VP8L bitstream probing functions. + +// Returns true if the next 3 bytes in data contain the VP8 signature. +WEBP_EXTERN(int) VP8CheckSignature(const uint8_t* const data, size_t data_size); + +// Validates the VP8 data-header and retrieves basic header information viz +// width and height. Returns 0 in case of formatting error. *width/*height +// can be passed NULL. +WEBP_EXTERN(int) VP8GetInfo( + const uint8_t* data, + size_t data_size, // data available so far + size_t chunk_size, // total data size expected in the chunk + int* const width, int* const height); + +// Returns true if the next byte(s) in data is a VP8L signature. +WEBP_EXTERN(int) VP8LCheckSignature(const uint8_t* const data, size_t size); + +// Validates the VP8L data-header and retrieves basic header information viz +// width, height and alpha. Returns 0 in case of formatting error. +// width/height/has_alpha can be passed NULL. +WEBP_EXTERN(int) VP8LGetInfo( + const uint8_t* data, size_t data_size, // data available so far + int* const width, int* const height, int* const has_alpha); + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_WEBP_DECODE_VP8_H_ */ diff --git a/drivers/webpold/dec/frame.c b/drivers/webpold/dec/frame.c new file mode 100644 index 0000000000..9c91a48e17 --- /dev/null +++ b/drivers/webpold/dec/frame.c @@ -0,0 +1,679 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Frame-reconstruction function. Memory allocation. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> +#include "./vp8i.h" +#include "../utils/utils.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define ALIGN_MASK (32 - 1) + +//------------------------------------------------------------------------------ +// Filtering + +// kFilterExtraRows[] = How many extra lines are needed on the MB boundary +// for caching, given a filtering level. +// Simple filter: up to 2 luma samples are read and 1 is written. +// Complex filter: up to 4 luma samples are read and 3 are written. Same for +// U/V, so it's 8 samples total (because of the 2x upsampling). +static const uint8_t kFilterExtraRows[3] = { 0, 2, 8 }; + +static WEBP_INLINE int hev_thresh_from_level(int level, int keyframe) { + if (keyframe) { + return (level >= 40) ? 2 : (level >= 15) ? 1 : 0; + } else { + return (level >= 40) ? 3 : (level >= 20) ? 2 : (level >= 15) ? 1 : 0; + } +} + +static void DoFilter(const VP8Decoder* const dec, int mb_x, int mb_y) { + const VP8ThreadContext* const ctx = &dec->thread_ctx_; + const int y_bps = dec->cache_y_stride_; + VP8FInfo* const f_info = ctx->f_info_ + mb_x; + uint8_t* const y_dst = dec->cache_y_ + ctx->id_ * 16 * y_bps + mb_x * 16; + const int level = f_info->f_level_; + const int ilevel = f_info->f_ilevel_; + const int limit = 2 * level + ilevel; + if (level == 0) { + return; + } + if (dec->filter_type_ == 1) { // simple + if (mb_x > 0) { + VP8SimpleHFilter16(y_dst, y_bps, limit + 4); + } + if (f_info->f_inner_) { + VP8SimpleHFilter16i(y_dst, y_bps, limit); + } + if (mb_y > 0) { + VP8SimpleVFilter16(y_dst, y_bps, limit + 4); + } + if (f_info->f_inner_) { + VP8SimpleVFilter16i(y_dst, y_bps, limit); + } + } else { // complex + const int uv_bps = dec->cache_uv_stride_; + uint8_t* const u_dst = dec->cache_u_ + ctx->id_ * 8 * uv_bps + mb_x * 8; + uint8_t* const v_dst = dec->cache_v_ + ctx->id_ * 8 * uv_bps + mb_x * 8; + const int hev_thresh = + hev_thresh_from_level(level, dec->frm_hdr_.key_frame_); + if (mb_x > 0) { + VP8HFilter16(y_dst, y_bps, limit + 4, ilevel, hev_thresh); + VP8HFilter8(u_dst, v_dst, uv_bps, limit + 4, ilevel, hev_thresh); + } + if (f_info->f_inner_) { + VP8HFilter16i(y_dst, y_bps, limit, ilevel, hev_thresh); + VP8HFilter8i(u_dst, v_dst, uv_bps, limit, ilevel, hev_thresh); + } + if (mb_y > 0) { + VP8VFilter16(y_dst, y_bps, limit + 4, ilevel, hev_thresh); + VP8VFilter8(u_dst, v_dst, uv_bps, limit + 4, ilevel, hev_thresh); + } + if (f_info->f_inner_) { + VP8VFilter16i(y_dst, y_bps, limit, ilevel, hev_thresh); + VP8VFilter8i(u_dst, v_dst, uv_bps, limit, ilevel, hev_thresh); + } + } +} + +// Filter the decoded macroblock row (if needed) +static void FilterRow(const VP8Decoder* const dec) { + int mb_x; + const int mb_y = dec->thread_ctx_.mb_y_; + assert(dec->thread_ctx_.filter_row_); + for (mb_x = dec->tl_mb_x_; mb_x < dec->br_mb_x_; ++mb_x) { + DoFilter(dec, mb_x, mb_y); + } +} + +//------------------------------------------------------------------------------ + +void VP8StoreBlock(VP8Decoder* const dec) { + if (dec->filter_type_ > 0) { + VP8FInfo* const info = dec->f_info_ + dec->mb_x_; + const int skip = dec->mb_info_[dec->mb_x_].skip_; + int level = dec->filter_levels_[dec->segment_]; + if (dec->filter_hdr_.use_lf_delta_) { + // TODO(skal): only CURRENT is handled for now. + level += dec->filter_hdr_.ref_lf_delta_[0]; + if (dec->is_i4x4_) { + level += dec->filter_hdr_.mode_lf_delta_[0]; + } + } + level = (level < 0) ? 0 : (level > 63) ? 63 : level; + info->f_level_ = level; + + if (dec->filter_hdr_.sharpness_ > 0) { + if (dec->filter_hdr_.sharpness_ > 4) { + level >>= 2; + } else { + level >>= 1; + } + if (level > 9 - dec->filter_hdr_.sharpness_) { + level = 9 - dec->filter_hdr_.sharpness_; + } + } + + info->f_ilevel_ = (level < 1) ? 1 : level; + info->f_inner_ = (!skip || dec->is_i4x4_); + } + { + // Transfer samples to row cache + int y; + const int y_offset = dec->cache_id_ * 16 * dec->cache_y_stride_; + const int uv_offset = dec->cache_id_ * 8 * dec->cache_uv_stride_; + uint8_t* const ydst = dec->cache_y_ + dec->mb_x_ * 16 + y_offset; + uint8_t* const udst = dec->cache_u_ + dec->mb_x_ * 8 + uv_offset; + uint8_t* const vdst = dec->cache_v_ + dec->mb_x_ * 8 + uv_offset; + for (y = 0; y < 16; ++y) { + memcpy(ydst + y * dec->cache_y_stride_, + dec->yuv_b_ + Y_OFF + y * BPS, 16); + } + for (y = 0; y < 8; ++y) { + memcpy(udst + y * dec->cache_uv_stride_, + dec->yuv_b_ + U_OFF + y * BPS, 8); + memcpy(vdst + y * dec->cache_uv_stride_, + dec->yuv_b_ + V_OFF + y * BPS, 8); + } + } +} + +//------------------------------------------------------------------------------ +// This function is called after a row of macroblocks is finished decoding. +// It also takes into account the following restrictions: +// * In case of in-loop filtering, we must hold off sending some of the bottom +// pixels as they are yet unfiltered. They will be when the next macroblock +// row is decoded. Meanwhile, we must preserve them by rotating them in the +// cache area. This doesn't hold for the very bottom row of the uncropped +// picture of course. +// * we must clip the remaining pixels against the cropping area. The VP8Io +// struct must have the following fields set correctly before calling put(): + +#define MACROBLOCK_VPOS(mb_y) ((mb_y) * 16) // vertical position of a MB + +// Finalize and transmit a complete row. Return false in case of user-abort. +static int FinishRow(VP8Decoder* const dec, VP8Io* const io) { + int ok = 1; + const VP8ThreadContext* const ctx = &dec->thread_ctx_; + const int extra_y_rows = kFilterExtraRows[dec->filter_type_]; + const int ysize = extra_y_rows * dec->cache_y_stride_; + const int uvsize = (extra_y_rows / 2) * dec->cache_uv_stride_; + const int y_offset = ctx->id_ * 16 * dec->cache_y_stride_; + const int uv_offset = ctx->id_ * 8 * dec->cache_uv_stride_; + uint8_t* const ydst = dec->cache_y_ - ysize + y_offset; + uint8_t* const udst = dec->cache_u_ - uvsize + uv_offset; + uint8_t* const vdst = dec->cache_v_ - uvsize + uv_offset; + const int first_row = (ctx->mb_y_ == 0); + const int last_row = (ctx->mb_y_ >= dec->br_mb_y_ - 1); + int y_start = MACROBLOCK_VPOS(ctx->mb_y_); + int y_end = MACROBLOCK_VPOS(ctx->mb_y_ + 1); + + if (ctx->filter_row_) { + FilterRow(dec); + } + + if (io->put) { + if (!first_row) { + y_start -= extra_y_rows; + io->y = ydst; + io->u = udst; + io->v = vdst; + } else { + io->y = dec->cache_y_ + y_offset; + io->u = dec->cache_u_ + uv_offset; + io->v = dec->cache_v_ + uv_offset; + } + + if (!last_row) { + y_end -= extra_y_rows; + } + if (y_end > io->crop_bottom) { + y_end = io->crop_bottom; // make sure we don't overflow on last row. + } + io->a = NULL; + if (dec->alpha_data_ != NULL && y_start < y_end) { + // TODO(skal): several things to correct here: + // * testing presence of alpha with dec->alpha_data_ is not a good idea + // * we're actually decompressing the full plane only once. It should be + // more obvious from signature. + // * we could free alpha_data_ right after this call, but we don't own. + io->a = VP8DecompressAlphaRows(dec, y_start, y_end - y_start); + if (io->a == NULL) { + return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, + "Could not decode alpha data."); + } + } + if (y_start < io->crop_top) { + const int delta_y = io->crop_top - y_start; + y_start = io->crop_top; + assert(!(delta_y & 1)); + io->y += dec->cache_y_stride_ * delta_y; + io->u += dec->cache_uv_stride_ * (delta_y >> 1); + io->v += dec->cache_uv_stride_ * (delta_y >> 1); + if (io->a != NULL) { + io->a += io->width * delta_y; + } + } + if (y_start < y_end) { + io->y += io->crop_left; + io->u += io->crop_left >> 1; + io->v += io->crop_left >> 1; + if (io->a != NULL) { + io->a += io->crop_left; + } + io->mb_y = y_start - io->crop_top; + io->mb_w = io->crop_right - io->crop_left; + io->mb_h = y_end - y_start; + ok = io->put(io); + } + } + // rotate top samples if needed + if (ctx->id_ + 1 == dec->num_caches_) { + if (!last_row) { + memcpy(dec->cache_y_ - ysize, ydst + 16 * dec->cache_y_stride_, ysize); + memcpy(dec->cache_u_ - uvsize, udst + 8 * dec->cache_uv_stride_, uvsize); + memcpy(dec->cache_v_ - uvsize, vdst + 8 * dec->cache_uv_stride_, uvsize); + } + } + + return ok; +} + +#undef MACROBLOCK_VPOS + +//------------------------------------------------------------------------------ + +int VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io) { + int ok = 1; + VP8ThreadContext* const ctx = &dec->thread_ctx_; + if (!dec->use_threads_) { + // ctx->id_ and ctx->f_info_ are already set + ctx->mb_y_ = dec->mb_y_; + ctx->filter_row_ = dec->filter_row_; + ok = FinishRow(dec, io); + } else { + WebPWorker* const worker = &dec->worker_; + // Finish previous job *before* updating context + ok &= WebPWorkerSync(worker); + assert(worker->status_ == OK); + if (ok) { // spawn a new deblocking/output job + ctx->io_ = *io; + ctx->id_ = dec->cache_id_; + ctx->mb_y_ = dec->mb_y_; + ctx->filter_row_ = dec->filter_row_; + if (ctx->filter_row_) { // just swap filter info + VP8FInfo* const tmp = ctx->f_info_; + ctx->f_info_ = dec->f_info_; + dec->f_info_ = tmp; + } + WebPWorkerLaunch(worker); + if (++dec->cache_id_ == dec->num_caches_) { + dec->cache_id_ = 0; + } + } + } + return ok; +} + +//------------------------------------------------------------------------------ +// Finish setting up the decoding parameter once user's setup() is called. + +VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io) { + // Call setup() first. This may trigger additional decoding features on 'io'. + // Note: Afterward, we must call teardown() not matter what. + if (io->setup && !io->setup(io)) { + VP8SetError(dec, VP8_STATUS_USER_ABORT, "Frame setup failed"); + return dec->status_; + } + + // Disable filtering per user request + if (io->bypass_filtering) { + dec->filter_type_ = 0; + } + // TODO(skal): filter type / strength / sharpness forcing + + // Define the area where we can skip in-loop filtering, in case of cropping. + // + // 'Simple' filter reads two luma samples outside of the macroblock and + // and filters one. It doesn't filter the chroma samples. Hence, we can + // avoid doing the in-loop filtering before crop_top/crop_left position. + // For the 'Complex' filter, 3 samples are read and up to 3 are filtered. + // Means: there's a dependency chain that goes all the way up to the + // top-left corner of the picture (MB #0). We must filter all the previous + // macroblocks. + // TODO(skal): add an 'approximate_decoding' option, that won't produce + // a 1:1 bit-exactness for complex filtering? + { + const int extra_pixels = kFilterExtraRows[dec->filter_type_]; + if (dec->filter_type_ == 2) { + // For complex filter, we need to preserve the dependency chain. + dec->tl_mb_x_ = 0; + dec->tl_mb_y_ = 0; + } else { + // For simple filter, we can filter only the cropped region. + // We include 'extra_pixels' on the other side of the boundary, since + // vertical or horizontal filtering of the previous macroblock can + // modify some abutting pixels. + dec->tl_mb_x_ = (io->crop_left - extra_pixels) >> 4; + dec->tl_mb_y_ = (io->crop_top - extra_pixels) >> 4; + if (dec->tl_mb_x_ < 0) dec->tl_mb_x_ = 0; + if (dec->tl_mb_y_ < 0) dec->tl_mb_y_ = 0; + } + // We need some 'extra' pixels on the right/bottom. + dec->br_mb_y_ = (io->crop_bottom + 15 + extra_pixels) >> 4; + dec->br_mb_x_ = (io->crop_right + 15 + extra_pixels) >> 4; + if (dec->br_mb_x_ > dec->mb_w_) { + dec->br_mb_x_ = dec->mb_w_; + } + if (dec->br_mb_y_ > dec->mb_h_) { + dec->br_mb_y_ = dec->mb_h_; + } + } + return VP8_STATUS_OK; +} + +int VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io) { + int ok = 1; + if (dec->use_threads_) { + ok = WebPWorkerSync(&dec->worker_); + } + + if (io->teardown) { + io->teardown(io); + } + return ok; +} + +//------------------------------------------------------------------------------ +// For multi-threaded decoding we need to use 3 rows of 16 pixels as delay line. +// +// Reason is: the deblocking filter cannot deblock the bottom horizontal edges +// immediately, and needs to wait for first few rows of the next macroblock to +// be decoded. Hence, deblocking is lagging behind by 4 or 8 pixels (depending +// on strength). +// With two threads, the vertical positions of the rows being decoded are: +// Decode: [ 0..15][16..31][32..47][48..63][64..79][... +// Deblock: [ 0..11][12..27][28..43][44..59][... +// If we use two threads and two caches of 16 pixels, the sequence would be: +// Decode: [ 0..15][16..31][ 0..15!!][16..31][ 0..15][... +// Deblock: [ 0..11][12..27!!][-4..11][12..27][... +// The problem occurs during row [12..15!!] that both the decoding and +// deblocking threads are writing simultaneously. +// With 3 cache lines, one get a safe write pattern: +// Decode: [ 0..15][16..31][32..47][ 0..15][16..31][32..47][0.. +// Deblock: [ 0..11][12..27][28..43][-4..11][12..27][28... +// Note that multi-threaded output _without_ deblocking can make use of two +// cache lines of 16 pixels only, since there's no lagging behind. The decoding +// and output process have non-concurrent writing: +// Decode: [ 0..15][16..31][ 0..15][16..31][... +// io->put: [ 0..15][16..31][ 0..15][... + +#define MT_CACHE_LINES 3 +#define ST_CACHE_LINES 1 // 1 cache row only for single-threaded case + +// Initialize multi/single-thread worker +static int InitThreadContext(VP8Decoder* const dec) { + dec->cache_id_ = 0; + if (dec->use_threads_) { + WebPWorker* const worker = &dec->worker_; + if (!WebPWorkerReset(worker)) { + return VP8SetError(dec, VP8_STATUS_OUT_OF_MEMORY, + "thread initialization failed."); + } + worker->data1 = dec; + worker->data2 = (void*)&dec->thread_ctx_.io_; + worker->hook = (WebPWorkerHook)FinishRow; + dec->num_caches_ = + (dec->filter_type_ > 0) ? MT_CACHE_LINES : MT_CACHE_LINES - 1; + } else { + dec->num_caches_ = ST_CACHE_LINES; + } + return 1; +} + +#undef MT_CACHE_LINES +#undef ST_CACHE_LINES + +//------------------------------------------------------------------------------ +// Memory setup + +static int AllocateMemory(VP8Decoder* const dec) { + const int num_caches = dec->num_caches_; + const int mb_w = dec->mb_w_; + // Note: we use 'size_t' when there's no overflow risk, uint64_t otherwise. + const size_t intra_pred_mode_size = 4 * mb_w * sizeof(uint8_t); + const size_t top_size = (16 + 8 + 8) * mb_w; + const size_t mb_info_size = (mb_w + 1) * sizeof(VP8MB); + const size_t f_info_size = + (dec->filter_type_ > 0) ? + mb_w * (dec->use_threads_ ? 2 : 1) * sizeof(VP8FInfo) + : 0; + const size_t yuv_size = YUV_SIZE * sizeof(*dec->yuv_b_); + const size_t coeffs_size = 384 * sizeof(*dec->coeffs_); + const size_t cache_height = (16 * num_caches + + kFilterExtraRows[dec->filter_type_]) * 3 / 2; + const size_t cache_size = top_size * cache_height; + // alpha_size is the only one that scales as width x height. + const uint64_t alpha_size = (dec->alpha_data_ != NULL) ? + (uint64_t)dec->pic_hdr_.width_ * dec->pic_hdr_.height_ : 0ULL; + const uint64_t needed = (uint64_t)intra_pred_mode_size + + top_size + mb_info_size + f_info_size + + yuv_size + coeffs_size + + cache_size + alpha_size + ALIGN_MASK; + uint8_t* mem; + + if (needed != (size_t)needed) return 0; // check for overflow + if (needed > dec->mem_size_) { + free(dec->mem_); + dec->mem_size_ = 0; + dec->mem_ = WebPSafeMalloc(needed, sizeof(uint8_t)); + if (dec->mem_ == NULL) { + return VP8SetError(dec, VP8_STATUS_OUT_OF_MEMORY, + "no memory during frame initialization."); + } + // down-cast is ok, thanks to WebPSafeAlloc() above. + dec->mem_size_ = (size_t)needed; + } + + mem = (uint8_t*)dec->mem_; + dec->intra_t_ = (uint8_t*)mem; + mem += intra_pred_mode_size; + + dec->y_t_ = (uint8_t*)mem; + mem += 16 * mb_w; + dec->u_t_ = (uint8_t*)mem; + mem += 8 * mb_w; + dec->v_t_ = (uint8_t*)mem; + mem += 8 * mb_w; + + dec->mb_info_ = ((VP8MB*)mem) + 1; + mem += mb_info_size; + + dec->f_info_ = f_info_size ? (VP8FInfo*)mem : NULL; + mem += f_info_size; + dec->thread_ctx_.id_ = 0; + dec->thread_ctx_.f_info_ = dec->f_info_; + if (dec->use_threads_) { + // secondary cache line. The deblocking process need to make use of the + // filtering strength from previous macroblock row, while the new ones + // are being decoded in parallel. We'll just swap the pointers. + dec->thread_ctx_.f_info_ += mb_w; + } + + mem = (uint8_t*)((uintptr_t)(mem + ALIGN_MASK) & ~ALIGN_MASK); + assert((yuv_size & ALIGN_MASK) == 0); + dec->yuv_b_ = (uint8_t*)mem; + mem += yuv_size; + + dec->coeffs_ = (int16_t*)mem; + mem += coeffs_size; + + dec->cache_y_stride_ = 16 * mb_w; + dec->cache_uv_stride_ = 8 * mb_w; + { + const int extra_rows = kFilterExtraRows[dec->filter_type_]; + const int extra_y = extra_rows * dec->cache_y_stride_; + const int extra_uv = (extra_rows / 2) * dec->cache_uv_stride_; + dec->cache_y_ = ((uint8_t*)mem) + extra_y; + dec->cache_u_ = dec->cache_y_ + + 16 * num_caches * dec->cache_y_stride_ + extra_uv; + dec->cache_v_ = dec->cache_u_ + + 8 * num_caches * dec->cache_uv_stride_ + extra_uv; + dec->cache_id_ = 0; + } + mem += cache_size; + + // alpha plane + dec->alpha_plane_ = alpha_size ? (uint8_t*)mem : NULL; + mem += alpha_size; + + // note: left-info is initialized once for all. + memset(dec->mb_info_ - 1, 0, mb_info_size); + + // initialize top + memset(dec->intra_t_, B_DC_PRED, intra_pred_mode_size); + + return 1; +} + +static void InitIo(VP8Decoder* const dec, VP8Io* io) { + // prepare 'io' + io->mb_y = 0; + io->y = dec->cache_y_; + io->u = dec->cache_u_; + io->v = dec->cache_v_; + io->y_stride = dec->cache_y_stride_; + io->uv_stride = dec->cache_uv_stride_; + io->a = NULL; +} + +int VP8InitFrame(VP8Decoder* const dec, VP8Io* io) { + if (!InitThreadContext(dec)) return 0; // call first. Sets dec->num_caches_. + if (!AllocateMemory(dec)) return 0; + InitIo(dec, io); + VP8DspInit(); // Init critical function pointers and look-up tables. + return 1; +} + +//------------------------------------------------------------------------------ +// Main reconstruction function. + +static const int kScan[16] = { + 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS, + 0 + 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS, + 0 + 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS, + 0 + 12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS +}; + +static WEBP_INLINE int CheckMode(VP8Decoder* const dec, int mode) { + if (mode == B_DC_PRED) { + if (dec->mb_x_ == 0) { + return (dec->mb_y_ == 0) ? B_DC_PRED_NOTOPLEFT : B_DC_PRED_NOLEFT; + } else { + return (dec->mb_y_ == 0) ? B_DC_PRED_NOTOP : B_DC_PRED; + } + } + return mode; +} + +static WEBP_INLINE void Copy32b(uint8_t* dst, uint8_t* src) { + *(uint32_t*)dst = *(uint32_t*)src; +} + +void VP8ReconstructBlock(VP8Decoder* const dec) { + uint8_t* const y_dst = dec->yuv_b_ + Y_OFF; + uint8_t* const u_dst = dec->yuv_b_ + U_OFF; + uint8_t* const v_dst = dec->yuv_b_ + V_OFF; + + // Rotate in the left samples from previously decoded block. We move four + // pixels at a time for alignment reason, and because of in-loop filter. + if (dec->mb_x_ > 0) { + int j; + for (j = -1; j < 16; ++j) { + Copy32b(&y_dst[j * BPS - 4], &y_dst[j * BPS + 12]); + } + for (j = -1; j < 8; ++j) { + Copy32b(&u_dst[j * BPS - 4], &u_dst[j * BPS + 4]); + Copy32b(&v_dst[j * BPS - 4], &v_dst[j * BPS + 4]); + } + } else { + int j; + for (j = 0; j < 16; ++j) { + y_dst[j * BPS - 1] = 129; + } + for (j = 0; j < 8; ++j) { + u_dst[j * BPS - 1] = 129; + v_dst[j * BPS - 1] = 129; + } + // Init top-left sample on left column too + if (dec->mb_y_ > 0) { + y_dst[-1 - BPS] = u_dst[-1 - BPS] = v_dst[-1 - BPS] = 129; + } + } + { + // bring top samples into the cache + uint8_t* const top_y = dec->y_t_ + dec->mb_x_ * 16; + uint8_t* const top_u = dec->u_t_ + dec->mb_x_ * 8; + uint8_t* const top_v = dec->v_t_ + dec->mb_x_ * 8; + const int16_t* coeffs = dec->coeffs_; + int n; + + if (dec->mb_y_ > 0) { + memcpy(y_dst - BPS, top_y, 16); + memcpy(u_dst - BPS, top_u, 8); + memcpy(v_dst - BPS, top_v, 8); + } else if (dec->mb_x_ == 0) { + // we only need to do this init once at block (0,0). + // Afterward, it remains valid for the whole topmost row. + memset(y_dst - BPS - 1, 127, 16 + 4 + 1); + memset(u_dst - BPS - 1, 127, 8 + 1); + memset(v_dst - BPS - 1, 127, 8 + 1); + } + + // predict and add residuals + + if (dec->is_i4x4_) { // 4x4 + uint32_t* const top_right = (uint32_t*)(y_dst - BPS + 16); + + if (dec->mb_y_ > 0) { + if (dec->mb_x_ >= dec->mb_w_ - 1) { // on rightmost border + top_right[0] = top_y[15] * 0x01010101u; + } else { + memcpy(top_right, top_y + 16, sizeof(*top_right)); + } + } + // replicate the top-right pixels below + top_right[BPS] = top_right[2 * BPS] = top_right[3 * BPS] = top_right[0]; + + // predict and add residues for all 4x4 blocks in turn. + for (n = 0; n < 16; n++) { + uint8_t* const dst = y_dst + kScan[n]; + VP8PredLuma4[dec->imodes_[n]](dst); + if (dec->non_zero_ac_ & (1 << n)) { + VP8Transform(coeffs + n * 16, dst, 0); + } else if (dec->non_zero_ & (1 << n)) { // only DC is present + VP8TransformDC(coeffs + n * 16, dst); + } + } + } else { // 16x16 + const int pred_func = CheckMode(dec, dec->imodes_[0]); + VP8PredLuma16[pred_func](y_dst); + if (dec->non_zero_) { + for (n = 0; n < 16; n++) { + uint8_t* const dst = y_dst + kScan[n]; + if (dec->non_zero_ac_ & (1 << n)) { + VP8Transform(coeffs + n * 16, dst, 0); + } else if (dec->non_zero_ & (1 << n)) { // only DC is present + VP8TransformDC(coeffs + n * 16, dst); + } + } + } + } + { + // Chroma + const int pred_func = CheckMode(dec, dec->uvmode_); + VP8PredChroma8[pred_func](u_dst); + VP8PredChroma8[pred_func](v_dst); + + if (dec->non_zero_ & 0x0f0000) { // chroma-U + const int16_t* const u_coeffs = dec->coeffs_ + 16 * 16; + if (dec->non_zero_ac_ & 0x0f0000) { + VP8TransformUV(u_coeffs, u_dst); + } else { + VP8TransformDCUV(u_coeffs, u_dst); + } + } + if (dec->non_zero_ & 0xf00000) { // chroma-V + const int16_t* const v_coeffs = dec->coeffs_ + 20 * 16; + if (dec->non_zero_ac_ & 0xf00000) { + VP8TransformUV(v_coeffs, v_dst); + } else { + VP8TransformDCUV(v_coeffs, v_dst); + } + } + + // stash away top samples for next block + if (dec->mb_y_ < dec->mb_h_ - 1) { + memcpy(top_y, y_dst + 15 * BPS, 16); + memcpy(top_u, u_dst + 7 * BPS, 8); + memcpy(top_v, v_dst + 7 * BPS, 8); + } + } + } +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/idec.c b/drivers/webpold/dec/idec.c new file mode 100644 index 0000000000..7df790ced8 --- /dev/null +++ b/drivers/webpold/dec/idec.c @@ -0,0 +1,785 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Incremental decoding +// +// Author: somnath@google.com (Somnath Banerjee) + +#include <assert.h> +#include <string.h> +#include <stdlib.h> + +#include "./webpi.h" +#include "./vp8i.h" +#include "../utils/utils.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// In append mode, buffer allocations increase as multiples of this value. +// Needs to be a power of 2. +#define CHUNK_SIZE 4096 +#define MAX_MB_SIZE 4096 + +//------------------------------------------------------------------------------ +// Data structures for memory and states + +// Decoding states. State normally flows like HEADER->PARTS0->DATA->DONE. +// If there is any error the decoder goes into state ERROR. +typedef enum { + STATE_PRE_VP8, // All data before that of the first VP8 chunk. + STATE_VP8_FRAME_HEADER, // For VP8 Frame header (within VP8 chunk). + STATE_VP8_PARTS0, + STATE_VP8_DATA, + STATE_VP8L_HEADER, + STATE_VP8L_DATA, + STATE_DONE, + STATE_ERROR +} DecState; + +// Operating state for the MemBuffer +typedef enum { + MEM_MODE_NONE = 0, + MEM_MODE_APPEND, + MEM_MODE_MAP +} MemBufferMode; + +// storage for partition #0 and partial data (in a rolling fashion) +typedef struct { + MemBufferMode mode_; // Operation mode + size_t start_; // start location of the data to be decoded + size_t end_; // end location + size_t buf_size_; // size of the allocated buffer + uint8_t* buf_; // We don't own this buffer in case WebPIUpdate() + + size_t part0_size_; // size of partition #0 + const uint8_t* part0_buf_; // buffer to store partition #0 +} MemBuffer; + +struct WebPIDecoder { + DecState state_; // current decoding state + WebPDecParams params_; // Params to store output info + int is_lossless_; // for down-casting 'dec_'. + void* dec_; // either a VP8Decoder or a VP8LDecoder instance + VP8Io io_; + + MemBuffer mem_; // input memory buffer. + WebPDecBuffer output_; // output buffer (when no external one is supplied) + size_t chunk_size_; // Compressed VP8/VP8L size extracted from Header. +}; + +// MB context to restore in case VP8DecodeMB() fails +typedef struct { + VP8MB left_; + VP8MB info_; + uint8_t intra_t_[4]; + uint8_t intra_l_[4]; + VP8BitReader br_; + VP8BitReader token_br_; +} MBContext; + +//------------------------------------------------------------------------------ +// MemBuffer: incoming data handling + +static void RemapBitReader(VP8BitReader* const br, ptrdiff_t offset) { + if (br->buf_ != NULL) { + br->buf_ += offset; + br->buf_end_ += offset; + } +} + +static WEBP_INLINE size_t MemDataSize(const MemBuffer* mem) { + return (mem->end_ - mem->start_); +} + +static void DoRemap(WebPIDecoder* const idec, ptrdiff_t offset) { + MemBuffer* const mem = &idec->mem_; + const uint8_t* const new_base = mem->buf_ + mem->start_; + // note: for VP8, setting up idec->io_ is only really needed at the beginning + // of the decoding, till partition #0 is complete. + idec->io_.data = new_base; + idec->io_.data_size = MemDataSize(mem); + + if (idec->dec_ != NULL) { + if (!idec->is_lossless_) { + VP8Decoder* const dec = (VP8Decoder*)idec->dec_; + const int last_part = dec->num_parts_ - 1; + if (offset != 0) { + int p; + for (p = 0; p <= last_part; ++p) { + RemapBitReader(dec->parts_ + p, offset); + } + // Remap partition #0 data pointer to new offset, but only in MAP + // mode (in APPEND mode, partition #0 is copied into a fixed memory). + if (mem->mode_ == MEM_MODE_MAP) { + RemapBitReader(&dec->br_, offset); + } + } + assert(last_part >= 0); + dec->parts_[last_part].buf_end_ = mem->buf_ + mem->end_; + } else { // Resize lossless bitreader + VP8LDecoder* const dec = (VP8LDecoder*)idec->dec_; + VP8LBitReaderSetBuffer(&dec->br_, new_base, MemDataSize(mem)); + } + } +} + +// Appends data to the end of MemBuffer->buf_. It expands the allocated memory +// size if required and also updates VP8BitReader's if new memory is allocated. +static int AppendToMemBuffer(WebPIDecoder* const idec, + const uint8_t* const data, size_t data_size) { + MemBuffer* const mem = &idec->mem_; + const uint8_t* const old_base = mem->buf_ + mem->start_; + assert(mem->mode_ == MEM_MODE_APPEND); + if (data_size > MAX_CHUNK_PAYLOAD) { + // security safeguard: trying to allocate more than what the format + // allows for a chunk should be considered a smoke smell. + return 0; + } + + if (mem->end_ + data_size > mem->buf_size_) { // Need some free memory + const size_t current_size = MemDataSize(mem); + const uint64_t new_size = (uint64_t)current_size + data_size; + const uint64_t extra_size = (new_size + CHUNK_SIZE - 1) & ~(CHUNK_SIZE - 1); + uint8_t* const new_buf = + (uint8_t*)WebPSafeMalloc(extra_size, sizeof(*new_buf)); + if (new_buf == NULL) return 0; + memcpy(new_buf, old_base, current_size); + free(mem->buf_); + mem->buf_ = new_buf; + mem->buf_size_ = (size_t)extra_size; + mem->start_ = 0; + mem->end_ = current_size; + } + + memcpy(mem->buf_ + mem->end_, data, data_size); + mem->end_ += data_size; + assert(mem->end_ <= mem->buf_size_); + + DoRemap(idec, mem->buf_ + mem->start_ - old_base); + return 1; +} + +static int RemapMemBuffer(WebPIDecoder* const idec, + const uint8_t* const data, size_t data_size) { + MemBuffer* const mem = &idec->mem_; + const uint8_t* const old_base = mem->buf_ + mem->start_; + assert(mem->mode_ == MEM_MODE_MAP); + + if (data_size < mem->buf_size_) return 0; // can't remap to a shorter buffer! + + mem->buf_ = (uint8_t*)data; + mem->end_ = mem->buf_size_ = data_size; + + DoRemap(idec, mem->buf_ + mem->start_ - old_base); + return 1; +} + +static void InitMemBuffer(MemBuffer* const mem) { + mem->mode_ = MEM_MODE_NONE; + mem->buf_ = NULL; + mem->buf_size_ = 0; + mem->part0_buf_ = NULL; + mem->part0_size_ = 0; +} + +static void ClearMemBuffer(MemBuffer* const mem) { + assert(mem); + if (mem->mode_ == MEM_MODE_APPEND) { + free(mem->buf_); + free((void*)mem->part0_buf_); + } +} + +static int CheckMemBufferMode(MemBuffer* const mem, MemBufferMode expected) { + if (mem->mode_ == MEM_MODE_NONE) { + mem->mode_ = expected; // switch to the expected mode + } else if (mem->mode_ != expected) { + return 0; // we mixed the modes => error + } + assert(mem->mode_ == expected); // mode is ok + return 1; +} + +//------------------------------------------------------------------------------ +// Macroblock-decoding contexts + +static void SaveContext(const VP8Decoder* dec, const VP8BitReader* token_br, + MBContext* const context) { + const VP8BitReader* const br = &dec->br_; + const VP8MB* const left = dec->mb_info_ - 1; + const VP8MB* const info = dec->mb_info_ + dec->mb_x_; + + context->left_ = *left; + context->info_ = *info; + context->br_ = *br; + context->token_br_ = *token_br; + memcpy(context->intra_t_, dec->intra_t_ + 4 * dec->mb_x_, 4); + memcpy(context->intra_l_, dec->intra_l_, 4); +} + +static void RestoreContext(const MBContext* context, VP8Decoder* const dec, + VP8BitReader* const token_br) { + VP8BitReader* const br = &dec->br_; + VP8MB* const left = dec->mb_info_ - 1; + VP8MB* const info = dec->mb_info_ + dec->mb_x_; + + *left = context->left_; + *info = context->info_; + *br = context->br_; + *token_br = context->token_br_; + memcpy(dec->intra_t_ + 4 * dec->mb_x_, context->intra_t_, 4); + memcpy(dec->intra_l_, context->intra_l_, 4); +} + +//------------------------------------------------------------------------------ + +static VP8StatusCode IDecError(WebPIDecoder* const idec, VP8StatusCode error) { + if (idec->state_ == STATE_VP8_DATA) { + VP8Io* const io = &idec->io_; + if (io->teardown) { + io->teardown(io); + } + } + idec->state_ = STATE_ERROR; + return error; +} + +static void ChangeState(WebPIDecoder* const idec, DecState new_state, + size_t consumed_bytes) { + MemBuffer* const mem = &idec->mem_; + idec->state_ = new_state; + mem->start_ += consumed_bytes; + assert(mem->start_ <= mem->end_); + idec->io_.data = mem->buf_ + mem->start_; + idec->io_.data_size = MemDataSize(mem); +} + +// Headers +static VP8StatusCode DecodeWebPHeaders(WebPIDecoder* const idec) { + MemBuffer* const mem = &idec->mem_; + const uint8_t* data = mem->buf_ + mem->start_; + size_t curr_size = MemDataSize(mem); + VP8StatusCode status; + WebPHeaderStructure headers; + + headers.data = data; + headers.data_size = curr_size; + status = WebPParseHeaders(&headers); + if (status == VP8_STATUS_NOT_ENOUGH_DATA) { + return VP8_STATUS_SUSPENDED; // We haven't found a VP8 chunk yet. + } else if (status != VP8_STATUS_OK) { + return IDecError(idec, status); + } + + idec->chunk_size_ = headers.compressed_size; + idec->is_lossless_ = headers.is_lossless; + if (!idec->is_lossless_) { + VP8Decoder* const dec = VP8New(); + if (dec == NULL) { + return VP8_STATUS_OUT_OF_MEMORY; + } + idec->dec_ = dec; +#ifdef WEBP_USE_THREAD + dec->use_threads_ = (idec->params_.options != NULL) && + (idec->params_.options->use_threads > 0); +#else + dec->use_threads_ = 0; +#endif + dec->alpha_data_ = headers.alpha_data; + dec->alpha_data_size_ = headers.alpha_data_size; + ChangeState(idec, STATE_VP8_FRAME_HEADER, headers.offset); + } else { + VP8LDecoder* const dec = VP8LNew(); + if (dec == NULL) { + return VP8_STATUS_OUT_OF_MEMORY; + } + idec->dec_ = dec; + ChangeState(idec, STATE_VP8L_HEADER, headers.offset); + } + return VP8_STATUS_OK; +} + +static VP8StatusCode DecodeVP8FrameHeader(WebPIDecoder* const idec) { + const uint8_t* data = idec->mem_.buf_ + idec->mem_.start_; + const size_t curr_size = MemDataSize(&idec->mem_); + uint32_t bits; + + if (curr_size < VP8_FRAME_HEADER_SIZE) { + // Not enough data bytes to extract VP8 Frame Header. + return VP8_STATUS_SUSPENDED; + } + if (!VP8GetInfo(data, curr_size, idec->chunk_size_, NULL, NULL)) { + return IDecError(idec, VP8_STATUS_BITSTREAM_ERROR); + } + + bits = data[0] | (data[1] << 8) | (data[2] << 16); + idec->mem_.part0_size_ = (bits >> 5) + VP8_FRAME_HEADER_SIZE; + + idec->io_.data = data; + idec->io_.data_size = curr_size; + idec->state_ = STATE_VP8_PARTS0; + return VP8_STATUS_OK; +} + +// Partition #0 +static int CopyParts0Data(WebPIDecoder* const idec) { + VP8Decoder* const dec = (VP8Decoder*)idec->dec_; + VP8BitReader* const br = &dec->br_; + const size_t psize = br->buf_end_ - br->buf_; + MemBuffer* const mem = &idec->mem_; + assert(!idec->is_lossless_); + assert(mem->part0_buf_ == NULL); + assert(psize > 0); + assert(psize <= mem->part0_size_); // Format limit: no need for runtime check + if (mem->mode_ == MEM_MODE_APPEND) { + // We copy and grab ownership of the partition #0 data. + uint8_t* const part0_buf = (uint8_t*)malloc(psize); + if (part0_buf == NULL) { + return 0; + } + memcpy(part0_buf, br->buf_, psize); + mem->part0_buf_ = part0_buf; + br->buf_ = part0_buf; + br->buf_end_ = part0_buf + psize; + } else { + // Else: just keep pointers to the partition #0's data in dec_->br_. + } + mem->start_ += psize; + return 1; +} + +static VP8StatusCode DecodePartition0(WebPIDecoder* const idec) { + VP8Decoder* const dec = (VP8Decoder*)idec->dec_; + VP8Io* const io = &idec->io_; + const WebPDecParams* const params = &idec->params_; + WebPDecBuffer* const output = params->output; + + // Wait till we have enough data for the whole partition #0 + if (MemDataSize(&idec->mem_) < idec->mem_.part0_size_) { + return VP8_STATUS_SUSPENDED; + } + + if (!VP8GetHeaders(dec, io)) { + const VP8StatusCode status = dec->status_; + if (status == VP8_STATUS_SUSPENDED || + status == VP8_STATUS_NOT_ENOUGH_DATA) { + // treating NOT_ENOUGH_DATA as SUSPENDED state + return VP8_STATUS_SUSPENDED; + } + return IDecError(idec, status); + } + + // Allocate/Verify output buffer now + dec->status_ = WebPAllocateDecBuffer(io->width, io->height, params->options, + output); + if (dec->status_ != VP8_STATUS_OK) { + return IDecError(idec, dec->status_); + } + + if (!CopyParts0Data(idec)) { + return IDecError(idec, VP8_STATUS_OUT_OF_MEMORY); + } + + // Finish setting up the decoding parameters. Will call io->setup(). + if (VP8EnterCritical(dec, io) != VP8_STATUS_OK) { + return IDecError(idec, dec->status_); + } + + // Note: past this point, teardown() must always be called + // in case of error. + idec->state_ = STATE_VP8_DATA; + // Allocate memory and prepare everything. + if (!VP8InitFrame(dec, io)) { + return IDecError(idec, dec->status_); + } + return VP8_STATUS_OK; +} + +// Remaining partitions +static VP8StatusCode DecodeRemaining(WebPIDecoder* const idec) { + VP8Decoder* const dec = (VP8Decoder*)idec->dec_; + VP8Io* const io = &idec->io_; + + assert(dec->ready_); + + for (; dec->mb_y_ < dec->mb_h_; ++dec->mb_y_) { + VP8BitReader* token_br = &dec->parts_[dec->mb_y_ & (dec->num_parts_ - 1)]; + if (dec->mb_x_ == 0) { + VP8InitScanline(dec); + } + for (; dec->mb_x_ < dec->mb_w_; dec->mb_x_++) { + MBContext context; + SaveContext(dec, token_br, &context); + + if (!VP8DecodeMB(dec, token_br)) { + RestoreContext(&context, dec, token_br); + // We shouldn't fail when MAX_MB data was available + if (dec->num_parts_ == 1 && MemDataSize(&idec->mem_) > MAX_MB_SIZE) { + return IDecError(idec, VP8_STATUS_BITSTREAM_ERROR); + } + return VP8_STATUS_SUSPENDED; + } + VP8ReconstructBlock(dec); + // Store data and save block's filtering params + VP8StoreBlock(dec); + + // Release buffer only if there is only one partition + if (dec->num_parts_ == 1) { + idec->mem_.start_ = token_br->buf_ - idec->mem_.buf_; + assert(idec->mem_.start_ <= idec->mem_.end_); + } + } + if (!VP8ProcessRow(dec, io)) { + return IDecError(idec, VP8_STATUS_USER_ABORT); + } + dec->mb_x_ = 0; + } + // Synchronize the thread and check for errors. + if (!VP8ExitCritical(dec, io)) { + return IDecError(idec, VP8_STATUS_USER_ABORT); + } + dec->ready_ = 0; + idec->state_ = STATE_DONE; + + return VP8_STATUS_OK; +} + +static int ErrorStatusLossless(WebPIDecoder* const idec, VP8StatusCode status) { + if (status == VP8_STATUS_SUSPENDED || status == VP8_STATUS_NOT_ENOUGH_DATA) { + return VP8_STATUS_SUSPENDED; + } + return IDecError(idec, status); +} + +static VP8StatusCode DecodeVP8LHeader(WebPIDecoder* const idec) { + VP8Io* const io = &idec->io_; + VP8LDecoder* const dec = (VP8LDecoder*)idec->dec_; + const WebPDecParams* const params = &idec->params_; + WebPDecBuffer* const output = params->output; + size_t curr_size = MemDataSize(&idec->mem_); + assert(idec->is_lossless_); + + // Wait until there's enough data for decoding header. + if (curr_size < (idec->chunk_size_ >> 3)) { + return VP8_STATUS_SUSPENDED; + } + if (!VP8LDecodeHeader(dec, io)) { + return ErrorStatusLossless(idec, dec->status_); + } + // Allocate/verify output buffer now. + dec->status_ = WebPAllocateDecBuffer(io->width, io->height, params->options, + output); + if (dec->status_ != VP8_STATUS_OK) { + return IDecError(idec, dec->status_); + } + + idec->state_ = STATE_VP8L_DATA; + return VP8_STATUS_OK; +} + +static VP8StatusCode DecodeVP8LData(WebPIDecoder* const idec) { + VP8LDecoder* const dec = (VP8LDecoder*)idec->dec_; + const size_t curr_size = MemDataSize(&idec->mem_); + assert(idec->is_lossless_); + + // At present Lossless decoder can't decode image incrementally. So wait till + // all the image data is aggregated before image can be decoded. + if (curr_size < idec->chunk_size_) { + return VP8_STATUS_SUSPENDED; + } + + if (!VP8LDecodeImage(dec)) { + return ErrorStatusLossless(idec, dec->status_); + } + + idec->state_ = STATE_DONE; + + return VP8_STATUS_OK; +} + + // Main decoding loop +static VP8StatusCode IDecode(WebPIDecoder* idec) { + VP8StatusCode status = VP8_STATUS_SUSPENDED; + + if (idec->state_ == STATE_PRE_VP8) { + status = DecodeWebPHeaders(idec); + } else { + if (idec->dec_ == NULL) { + return VP8_STATUS_SUSPENDED; // can't continue if we have no decoder. + } + } + if (idec->state_ == STATE_VP8_FRAME_HEADER) { + status = DecodeVP8FrameHeader(idec); + } + if (idec->state_ == STATE_VP8_PARTS0) { + status = DecodePartition0(idec); + } + if (idec->state_ == STATE_VP8_DATA) { + status = DecodeRemaining(idec); + } + if (idec->state_ == STATE_VP8L_HEADER) { + status = DecodeVP8LHeader(idec); + } + if (idec->state_ == STATE_VP8L_DATA) { + status = DecodeVP8LData(idec); + } + return status; +} + +//------------------------------------------------------------------------------ +// Public functions + +WebPIDecoder* WebPINewDecoder(WebPDecBuffer* output_buffer) { + WebPIDecoder* idec = (WebPIDecoder*)calloc(1, sizeof(*idec)); + if (idec == NULL) { + return NULL; + } + + idec->state_ = STATE_PRE_VP8; + idec->chunk_size_ = 0; + + InitMemBuffer(&idec->mem_); + WebPInitDecBuffer(&idec->output_); + VP8InitIo(&idec->io_); + + WebPResetDecParams(&idec->params_); + idec->params_.output = output_buffer ? output_buffer : &idec->output_; + WebPInitCustomIo(&idec->params_, &idec->io_); // Plug the I/O functions. + + return idec; +} + +WebPIDecoder* WebPIDecode(const uint8_t* data, size_t data_size, + WebPDecoderConfig* config) { + WebPIDecoder* idec; + + // Parse the bitstream's features, if requested: + if (data != NULL && data_size > 0 && config != NULL) { + if (WebPGetFeatures(data, data_size, &config->input) != VP8_STATUS_OK) { + return NULL; + } + } + // Create an instance of the incremental decoder + idec = WebPINewDecoder(config ? &config->output : NULL); + if (idec == NULL) { + return NULL; + } + // Finish initialization + if (config != NULL) { + idec->params_.options = &config->options; + } + return idec; +} + +void WebPIDelete(WebPIDecoder* idec) { + if (idec == NULL) return; + if (idec->dec_ != NULL) { + if (!idec->is_lossless_) { + VP8Delete(idec->dec_); + } else { + VP8LDelete(idec->dec_); + } + } + ClearMemBuffer(&idec->mem_); + WebPFreeDecBuffer(&idec->output_); + free(idec); +} + +//------------------------------------------------------------------------------ +// Wrapper toward WebPINewDecoder + +WebPIDecoder* WebPINewRGB(WEBP_CSP_MODE mode, uint8_t* output_buffer, + size_t output_buffer_size, int output_stride) { + WebPIDecoder* idec; + if (mode >= MODE_YUV) return NULL; + idec = WebPINewDecoder(NULL); + if (idec == NULL) return NULL; + idec->output_.colorspace = mode; + idec->output_.is_external_memory = 1; + idec->output_.u.RGBA.rgba = output_buffer; + idec->output_.u.RGBA.stride = output_stride; + idec->output_.u.RGBA.size = output_buffer_size; + return idec; +} + +WebPIDecoder* WebPINewYUVA(uint8_t* luma, size_t luma_size, int luma_stride, + uint8_t* u, size_t u_size, int u_stride, + uint8_t* v, size_t v_size, int v_stride, + uint8_t* a, size_t a_size, int a_stride) { + WebPIDecoder* const idec = WebPINewDecoder(NULL); + if (idec == NULL) return NULL; + idec->output_.colorspace = (a == NULL) ? MODE_YUV : MODE_YUVA; + idec->output_.is_external_memory = 1; + idec->output_.u.YUVA.y = luma; + idec->output_.u.YUVA.y_stride = luma_stride; + idec->output_.u.YUVA.y_size = luma_size; + idec->output_.u.YUVA.u = u; + idec->output_.u.YUVA.u_stride = u_stride; + idec->output_.u.YUVA.u_size = u_size; + idec->output_.u.YUVA.v = v; + idec->output_.u.YUVA.v_stride = v_stride; + idec->output_.u.YUVA.v_size = v_size; + idec->output_.u.YUVA.a = a; + idec->output_.u.YUVA.a_stride = a_stride; + idec->output_.u.YUVA.a_size = a_size; + return idec; +} + +WebPIDecoder* WebPINewYUV(uint8_t* luma, size_t luma_size, int luma_stride, + uint8_t* u, size_t u_size, int u_stride, + uint8_t* v, size_t v_size, int v_stride) { + return WebPINewYUVA(luma, luma_size, luma_stride, + u, u_size, u_stride, + v, v_size, v_stride, + NULL, 0, 0); +} + +//------------------------------------------------------------------------------ + +static VP8StatusCode IDecCheckStatus(const WebPIDecoder* const idec) { + assert(idec); + if (idec->state_ == STATE_ERROR) { + return VP8_STATUS_BITSTREAM_ERROR; + } + if (idec->state_ == STATE_DONE) { + return VP8_STATUS_OK; + } + return VP8_STATUS_SUSPENDED; +} + +VP8StatusCode WebPIAppend(WebPIDecoder* idec, + const uint8_t* data, size_t data_size) { + VP8StatusCode status; + if (idec == NULL || data == NULL) { + return VP8_STATUS_INVALID_PARAM; + } + status = IDecCheckStatus(idec); + if (status != VP8_STATUS_SUSPENDED) { + return status; + } + // Check mixed calls between RemapMemBuffer and AppendToMemBuffer. + if (!CheckMemBufferMode(&idec->mem_, MEM_MODE_APPEND)) { + return VP8_STATUS_INVALID_PARAM; + } + // Append data to memory buffer + if (!AppendToMemBuffer(idec, data, data_size)) { + return VP8_STATUS_OUT_OF_MEMORY; + } + return IDecode(idec); +} + +VP8StatusCode WebPIUpdate(WebPIDecoder* idec, + const uint8_t* data, size_t data_size) { + VP8StatusCode status; + if (idec == NULL || data == NULL) { + return VP8_STATUS_INVALID_PARAM; + } + status = IDecCheckStatus(idec); + if (status != VP8_STATUS_SUSPENDED) { + return status; + } + // Check mixed calls between RemapMemBuffer and AppendToMemBuffer. + if (!CheckMemBufferMode(&idec->mem_, MEM_MODE_MAP)) { + return VP8_STATUS_INVALID_PARAM; + } + // Make the memory buffer point to the new buffer + if (!RemapMemBuffer(idec, data, data_size)) { + return VP8_STATUS_INVALID_PARAM; + } + return IDecode(idec); +} + +//------------------------------------------------------------------------------ + +static const WebPDecBuffer* GetOutputBuffer(const WebPIDecoder* const idec) { + if (idec == NULL || idec->dec_ == NULL) { + return NULL; + } + if (idec->state_ <= STATE_VP8_PARTS0) { + return NULL; + } + return idec->params_.output; +} + +const WebPDecBuffer* WebPIDecodedArea(const WebPIDecoder* idec, + int* left, int* top, + int* width, int* height) { + const WebPDecBuffer* const src = GetOutputBuffer(idec); + if (left != NULL) *left = 0; + if (top != NULL) *top = 0; + // TODO(skal): later include handling of rotations. + if (src) { + if (width != NULL) *width = src->width; + if (height != NULL) *height = idec->params_.last_y; + } else { + if (width != NULL) *width = 0; + if (height != NULL) *height = 0; + } + return src; +} + +uint8_t* WebPIDecGetRGB(const WebPIDecoder* idec, int* last_y, + int* width, int* height, int* stride) { + const WebPDecBuffer* const src = GetOutputBuffer(idec); + if (src == NULL) return NULL; + if (src->colorspace >= MODE_YUV) { + return NULL; + } + + if (last_y != NULL) *last_y = idec->params_.last_y; + if (width != NULL) *width = src->width; + if (height != NULL) *height = src->height; + if (stride != NULL) *stride = src->u.RGBA.stride; + + return src->u.RGBA.rgba; +} + +uint8_t* WebPIDecGetYUVA(const WebPIDecoder* idec, int* last_y, + uint8_t** u, uint8_t** v, uint8_t** a, + int* width, int* height, + int* stride, int* uv_stride, int* a_stride) { + const WebPDecBuffer* const src = GetOutputBuffer(idec); + if (src == NULL) return NULL; + if (src->colorspace < MODE_YUV) { + return NULL; + } + + if (last_y != NULL) *last_y = idec->params_.last_y; + if (u != NULL) *u = src->u.YUVA.u; + if (v != NULL) *v = src->u.YUVA.v; + if (a != NULL) *a = src->u.YUVA.a; + if (width != NULL) *width = src->width; + if (height != NULL) *height = src->height; + if (stride != NULL) *stride = src->u.YUVA.y_stride; + if (uv_stride != NULL) *uv_stride = src->u.YUVA.u_stride; + if (a_stride != NULL) *a_stride = src->u.YUVA.a_stride; + + return src->u.YUVA.y; +} + +int WebPISetIOHooks(WebPIDecoder* const idec, + VP8IoPutHook put, + VP8IoSetupHook setup, + VP8IoTeardownHook teardown, + void* user_data) { + if (idec == NULL || idec->state_ > STATE_PRE_VP8) { + return 0; + } + + idec->io_.put = put; + idec->io_.setup = setup; + idec->io_.teardown = teardown; + idec->io_.opaque = user_data; + + return 1; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/io.c b/drivers/webpold/dec/io.c new file mode 100644 index 0000000000..594804c2e6 --- /dev/null +++ b/drivers/webpold/dec/io.c @@ -0,0 +1,633 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// functions for sample output. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include "../dec/vp8i.h" +#include "./webpi.h" +#include "../dsp/dsp.h" +#include "../dsp/yuv.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Main YUV<->RGB conversion functions + +static int EmitYUV(const VP8Io* const io, WebPDecParams* const p) { + WebPDecBuffer* output = p->output; + const WebPYUVABuffer* const buf = &output->u.YUVA; + uint8_t* const y_dst = buf->y + io->mb_y * buf->y_stride; + uint8_t* const u_dst = buf->u + (io->mb_y >> 1) * buf->u_stride; + uint8_t* const v_dst = buf->v + (io->mb_y >> 1) * buf->v_stride; + const int mb_w = io->mb_w; + const int mb_h = io->mb_h; + const int uv_w = (mb_w + 1) / 2; + const int uv_h = (mb_h + 1) / 2; + int j; + for (j = 0; j < mb_h; ++j) { + memcpy(y_dst + j * buf->y_stride, io->y + j * io->y_stride, mb_w); + } + for (j = 0; j < uv_h; ++j) { + memcpy(u_dst + j * buf->u_stride, io->u + j * io->uv_stride, uv_w); + memcpy(v_dst + j * buf->v_stride, io->v + j * io->uv_stride, uv_w); + } + return io->mb_h; +} + +// Point-sampling U/V sampler. +static int EmitSampledRGB(const VP8Io* const io, WebPDecParams* const p) { + WebPDecBuffer* output = p->output; + const WebPRGBABuffer* const buf = &output->u.RGBA; + uint8_t* dst = buf->rgba + io->mb_y * buf->stride; + const uint8_t* y_src = io->y; + const uint8_t* u_src = io->u; + const uint8_t* v_src = io->v; + const WebPSampleLinePairFunc sample = WebPSamplers[output->colorspace]; + const int mb_w = io->mb_w; + const int last = io->mb_h - 1; + int j; + for (j = 0; j < last; j += 2) { + sample(y_src, y_src + io->y_stride, u_src, v_src, + dst, dst + buf->stride, mb_w); + y_src += 2 * io->y_stride; + u_src += io->uv_stride; + v_src += io->uv_stride; + dst += 2 * buf->stride; + } + if (j == last) { // Just do the last line twice + sample(y_src, y_src, u_src, v_src, dst, dst, mb_w); + } + return io->mb_h; +} + +//------------------------------------------------------------------------------ +// YUV444 -> RGB conversion + +#if 0 // TODO(skal): this is for future rescaling. +static int EmitRGB(const VP8Io* const io, WebPDecParams* const p) { + WebPDecBuffer* output = p->output; + const WebPRGBABuffer* const buf = &output->u.RGBA; + uint8_t* dst = buf->rgba + io->mb_y * buf->stride; + const uint8_t* y_src = io->y; + const uint8_t* u_src = io->u; + const uint8_t* v_src = io->v; + const WebPYUV444Converter convert = WebPYUV444Converters[output->colorspace]; + const int mb_w = io->mb_w; + const int last = io->mb_h; + int j; + for (j = 0; j < last; ++j) { + convert(y_src, u_src, v_src, dst, mb_w); + y_src += io->y_stride; + u_src += io->uv_stride; + v_src += io->uv_stride; + dst += buf->stride; + } + return io->mb_h; +} +#endif + +//------------------------------------------------------------------------------ +// Fancy upsampling + +#ifdef FANCY_UPSAMPLING +static int EmitFancyRGB(const VP8Io* const io, WebPDecParams* const p) { + int num_lines_out = io->mb_h; // a priori guess + const WebPRGBABuffer* const buf = &p->output->u.RGBA; + uint8_t* dst = buf->rgba + io->mb_y * buf->stride; + WebPUpsampleLinePairFunc upsample = WebPUpsamplers[p->output->colorspace]; + const uint8_t* cur_y = io->y; + const uint8_t* cur_u = io->u; + const uint8_t* cur_v = io->v; + const uint8_t* top_u = p->tmp_u; + const uint8_t* top_v = p->tmp_v; + int y = io->mb_y; + const int y_end = io->mb_y + io->mb_h; + const int mb_w = io->mb_w; + const int uv_w = (mb_w + 1) / 2; + + if (y == 0) { + // First line is special cased. We mirror the u/v samples at boundary. + upsample(NULL, cur_y, cur_u, cur_v, cur_u, cur_v, NULL, dst, mb_w); + } else { + // We can finish the left-over line from previous call. + upsample(p->tmp_y, cur_y, top_u, top_v, cur_u, cur_v, + dst - buf->stride, dst, mb_w); + ++num_lines_out; + } + // Loop over each output pairs of row. + for (; y + 2 < y_end; y += 2) { + top_u = cur_u; + top_v = cur_v; + cur_u += io->uv_stride; + cur_v += io->uv_stride; + dst += 2 * buf->stride; + cur_y += 2 * io->y_stride; + upsample(cur_y - io->y_stride, cur_y, + top_u, top_v, cur_u, cur_v, + dst - buf->stride, dst, mb_w); + } + // move to last row + cur_y += io->y_stride; + if (io->crop_top + y_end < io->crop_bottom) { + // Save the unfinished samples for next call (as we're not done yet). + memcpy(p->tmp_y, cur_y, mb_w * sizeof(*p->tmp_y)); + memcpy(p->tmp_u, cur_u, uv_w * sizeof(*p->tmp_u)); + memcpy(p->tmp_v, cur_v, uv_w * sizeof(*p->tmp_v)); + // The fancy upsampler leaves a row unfinished behind + // (except for the very last row) + num_lines_out--; + } else { + // Process the very last row of even-sized picture + if (!(y_end & 1)) { + upsample(cur_y, NULL, cur_u, cur_v, cur_u, cur_v, + dst + buf->stride, NULL, mb_w); + } + } + return num_lines_out; +} + +#endif /* FANCY_UPSAMPLING */ + +//------------------------------------------------------------------------------ + +static int EmitAlphaYUV(const VP8Io* const io, WebPDecParams* const p) { + const uint8_t* alpha = io->a; + const WebPYUVABuffer* const buf = &p->output->u.YUVA; + const int mb_w = io->mb_w; + const int mb_h = io->mb_h; + uint8_t* dst = buf->a + io->mb_y * buf->a_stride; + int j; + + if (alpha != NULL) { + for (j = 0; j < mb_h; ++j) { + memcpy(dst, alpha, mb_w * sizeof(*dst)); + alpha += io->width; + dst += buf->a_stride; + } + } else if (buf->a != NULL) { + // the user requested alpha, but there is none, set it to opaque. + for (j = 0; j < mb_h; ++j) { + memset(dst, 0xff, mb_w * sizeof(*dst)); + dst += buf->a_stride; + } + } + return 0; +} + +static int GetAlphaSourceRow(const VP8Io* const io, + const uint8_t** alpha, int* const num_rows) { + int start_y = io->mb_y; + *num_rows = io->mb_h; + + // Compensate for the 1-line delay of the fancy upscaler. + // This is similar to EmitFancyRGB(). + if (io->fancy_upsampling) { + if (start_y == 0) { + // We don't process the last row yet. It'll be done during the next call. + --*num_rows; + } else { + --start_y; + // Fortunately, *alpha data is persistent, so we can go back + // one row and finish alpha blending, now that the fancy upscaler + // completed the YUV->RGB interpolation. + *alpha -= io->width; + } + if (io->crop_top + io->mb_y + io->mb_h == io->crop_bottom) { + // If it's the very last call, we process all the remaining rows! + *num_rows = io->crop_bottom - io->crop_top - start_y; + } + } + return start_y; +} + +static int EmitAlphaRGB(const VP8Io* const io, WebPDecParams* const p) { + const uint8_t* alpha = io->a; + if (alpha != NULL) { + const int mb_w = io->mb_w; + const WEBP_CSP_MODE colorspace = p->output->colorspace; + const int alpha_first = + (colorspace == MODE_ARGB || colorspace == MODE_Argb); + const WebPRGBABuffer* const buf = &p->output->u.RGBA; + int num_rows; + const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows); + uint8_t* const base_rgba = buf->rgba + start_y * buf->stride; + uint8_t* dst = base_rgba + (alpha_first ? 0 : 3); + uint32_t alpha_mask = 0xff; + int i, j; + + for (j = 0; j < num_rows; ++j) { + for (i = 0; i < mb_w; ++i) { + const uint32_t alpha_value = alpha[i]; + dst[4 * i] = alpha_value; + alpha_mask &= alpha_value; + } + alpha += io->width; + dst += buf->stride; + } + // alpha_mask is < 0xff if there's non-trivial alpha to premultiply with. + if (alpha_mask != 0xff && WebPIsPremultipliedMode(colorspace)) { + WebPApplyAlphaMultiply(base_rgba, alpha_first, + mb_w, num_rows, buf->stride); + } + } + return 0; +} + +static int EmitAlphaRGBA4444(const VP8Io* const io, WebPDecParams* const p) { + const uint8_t* alpha = io->a; + if (alpha != NULL) { + const int mb_w = io->mb_w; + const WEBP_CSP_MODE colorspace = p->output->colorspace; + const WebPRGBABuffer* const buf = &p->output->u.RGBA; + int num_rows; + const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows); + uint8_t* const base_rgba = buf->rgba + start_y * buf->stride; + uint8_t* alpha_dst = base_rgba + 1; + uint32_t alpha_mask = 0x0f; + int i, j; + + for (j = 0; j < num_rows; ++j) { + for (i = 0; i < mb_w; ++i) { + // Fill in the alpha value (converted to 4 bits). + const uint32_t alpha_value = alpha[i] >> 4; + alpha_dst[2 * i] = (alpha_dst[2 * i] & 0xf0) | alpha_value; + alpha_mask &= alpha_value; + } + alpha += io->width; + alpha_dst += buf->stride; + } + if (alpha_mask != 0x0f && WebPIsPremultipliedMode(colorspace)) { + WebPApplyAlphaMultiply4444(base_rgba, mb_w, num_rows, buf->stride); + } + } + return 0; +} + +//------------------------------------------------------------------------------ +// YUV rescaling (no final RGB conversion needed) + +static int Rescale(const uint8_t* src, int src_stride, + int new_lines, WebPRescaler* const wrk) { + int num_lines_out = 0; + while (new_lines > 0) { // import new contributions of source rows. + const int lines_in = WebPRescalerImport(wrk, new_lines, src, src_stride); + src += lines_in * src_stride; + new_lines -= lines_in; + num_lines_out += WebPRescalerExport(wrk); // emit output row(s) + } + return num_lines_out; +} + +static int EmitRescaledYUV(const VP8Io* const io, WebPDecParams* const p) { + const int mb_h = io->mb_h; + const int uv_mb_h = (mb_h + 1) >> 1; + const int num_lines_out = Rescale(io->y, io->y_stride, mb_h, &p->scaler_y); + Rescale(io->u, io->uv_stride, uv_mb_h, &p->scaler_u); + Rescale(io->v, io->uv_stride, uv_mb_h, &p->scaler_v); + return num_lines_out; +} + +static int EmitRescaledAlphaYUV(const VP8Io* const io, WebPDecParams* const p) { + if (io->a != NULL) { + Rescale(io->a, io->width, io->mb_h, &p->scaler_a); + } + return 0; +} + +static int InitYUVRescaler(const VP8Io* const io, WebPDecParams* const p) { + const int has_alpha = WebPIsAlphaMode(p->output->colorspace); + const WebPYUVABuffer* const buf = &p->output->u.YUVA; + const int out_width = io->scaled_width; + const int out_height = io->scaled_height; + const int uv_out_width = (out_width + 1) >> 1; + const int uv_out_height = (out_height + 1) >> 1; + const int uv_in_width = (io->mb_w + 1) >> 1; + const int uv_in_height = (io->mb_h + 1) >> 1; + const size_t work_size = 2 * out_width; // scratch memory for luma rescaler + const size_t uv_work_size = 2 * uv_out_width; // and for each u/v ones + size_t tmp_size; + int32_t* work; + + tmp_size = work_size + 2 * uv_work_size; + if (has_alpha) { + tmp_size += work_size; + } + p->memory = calloc(1, tmp_size * sizeof(*work)); + if (p->memory == NULL) { + return 0; // memory error + } + work = (int32_t*)p->memory; + WebPRescalerInit(&p->scaler_y, io->mb_w, io->mb_h, + buf->y, out_width, out_height, buf->y_stride, 1, + io->mb_w, out_width, io->mb_h, out_height, + work); + WebPRescalerInit(&p->scaler_u, uv_in_width, uv_in_height, + buf->u, uv_out_width, uv_out_height, buf->u_stride, 1, + uv_in_width, uv_out_width, + uv_in_height, uv_out_height, + work + work_size); + WebPRescalerInit(&p->scaler_v, uv_in_width, uv_in_height, + buf->v, uv_out_width, uv_out_height, buf->v_stride, 1, + uv_in_width, uv_out_width, + uv_in_height, uv_out_height, + work + work_size + uv_work_size); + p->emit = EmitRescaledYUV; + + if (has_alpha) { + WebPRescalerInit(&p->scaler_a, io->mb_w, io->mb_h, + buf->a, out_width, out_height, buf->a_stride, 1, + io->mb_w, out_width, io->mb_h, out_height, + work + work_size + 2 * uv_work_size); + p->emit_alpha = EmitRescaledAlphaYUV; + } + return 1; +} + +//------------------------------------------------------------------------------ +// RGBA rescaling + +static int ExportRGB(WebPDecParams* const p, int y_pos) { + const WebPYUV444Converter convert = + WebPYUV444Converters[p->output->colorspace]; + const WebPRGBABuffer* const buf = &p->output->u.RGBA; + uint8_t* dst = buf->rgba + (p->last_y + y_pos) * buf->stride; + int num_lines_out = 0; + // For RGB rescaling, because of the YUV420, current scan position + // U/V can be +1/-1 line from the Y one. Hence the double test. + while (WebPRescalerHasPendingOutput(&p->scaler_y) && + WebPRescalerHasPendingOutput(&p->scaler_u)) { + assert(p->last_y + y_pos + num_lines_out < p->output->height); + assert(p->scaler_u.y_accum == p->scaler_v.y_accum); + WebPRescalerExportRow(&p->scaler_y); + WebPRescalerExportRow(&p->scaler_u); + WebPRescalerExportRow(&p->scaler_v); + convert(p->scaler_y.dst, p->scaler_u.dst, p->scaler_v.dst, + dst, p->scaler_y.dst_width); + dst += buf->stride; + ++num_lines_out; + } + return num_lines_out; +} + +static int EmitRescaledRGB(const VP8Io* const io, WebPDecParams* const p) { + const int mb_h = io->mb_h; + const int uv_mb_h = (mb_h + 1) >> 1; + int j = 0, uv_j = 0; + int num_lines_out = 0; + while (j < mb_h) { + const int y_lines_in = + WebPRescalerImport(&p->scaler_y, mb_h - j, + io->y + j * io->y_stride, io->y_stride); + const int u_lines_in = + WebPRescalerImport(&p->scaler_u, uv_mb_h - uv_j, + io->u + uv_j * io->uv_stride, io->uv_stride); + const int v_lines_in = + WebPRescalerImport(&p->scaler_v, uv_mb_h - uv_j, + io->v + uv_j * io->uv_stride, io->uv_stride); + (void)v_lines_in; // remove a gcc warning + assert(u_lines_in == v_lines_in); + j += y_lines_in; + uv_j += u_lines_in; + num_lines_out += ExportRGB(p, num_lines_out); + } + return num_lines_out; +} + +static int ExportAlpha(WebPDecParams* const p, int y_pos) { + const WebPRGBABuffer* const buf = &p->output->u.RGBA; + uint8_t* const base_rgba = buf->rgba + (p->last_y + y_pos) * buf->stride; + const WEBP_CSP_MODE colorspace = p->output->colorspace; + const int alpha_first = + (colorspace == MODE_ARGB || colorspace == MODE_Argb); + uint8_t* dst = base_rgba + (alpha_first ? 0 : 3); + int num_lines_out = 0; + const int is_premult_alpha = WebPIsPremultipliedMode(colorspace); + uint32_t alpha_mask = 0xff; + const int width = p->scaler_a.dst_width; + + while (WebPRescalerHasPendingOutput(&p->scaler_a)) { + int i; + assert(p->last_y + y_pos + num_lines_out < p->output->height); + WebPRescalerExportRow(&p->scaler_a); + for (i = 0; i < width; ++i) { + const uint32_t alpha_value = p->scaler_a.dst[i]; + dst[4 * i] = alpha_value; + alpha_mask &= alpha_value; + } + dst += buf->stride; + ++num_lines_out; + } + if (is_premult_alpha && alpha_mask != 0xff) { + WebPApplyAlphaMultiply(base_rgba, alpha_first, + width, num_lines_out, buf->stride); + } + return num_lines_out; +} + +static int ExportAlphaRGBA4444(WebPDecParams* const p, int y_pos) { + const WebPRGBABuffer* const buf = &p->output->u.RGBA; + uint8_t* const base_rgba = buf->rgba + (p->last_y + y_pos) * buf->stride; + uint8_t* alpha_dst = base_rgba + 1; + int num_lines_out = 0; + const WEBP_CSP_MODE colorspace = p->output->colorspace; + const int width = p->scaler_a.dst_width; + const int is_premult_alpha = WebPIsPremultipliedMode(colorspace); + uint32_t alpha_mask = 0x0f; + + while (WebPRescalerHasPendingOutput(&p->scaler_a)) { + int i; + assert(p->last_y + y_pos + num_lines_out < p->output->height); + WebPRescalerExportRow(&p->scaler_a); + for (i = 0; i < width; ++i) { + // Fill in the alpha value (converted to 4 bits). + const uint32_t alpha_value = p->scaler_a.dst[i] >> 4; + alpha_dst[2 * i] = (alpha_dst[2 * i] & 0xf0) | alpha_value; + alpha_mask &= alpha_value; + } + alpha_dst += buf->stride; + ++num_lines_out; + } + if (is_premult_alpha && alpha_mask != 0x0f) { + WebPApplyAlphaMultiply4444(base_rgba, width, num_lines_out, buf->stride); + } + return num_lines_out; +} + +static int EmitRescaledAlphaRGB(const VP8Io* const io, WebPDecParams* const p) { + if (io->a != NULL) { + WebPRescaler* const scaler = &p->scaler_a; + int j = 0; + int pos = 0; + while (j < io->mb_h) { + j += WebPRescalerImport(scaler, io->mb_h - j, + io->a + j * io->width, io->width); + pos += p->emit_alpha_row(p, pos); + } + } + return 0; +} + +static int InitRGBRescaler(const VP8Io* const io, WebPDecParams* const p) { + const int has_alpha = WebPIsAlphaMode(p->output->colorspace); + const int out_width = io->scaled_width; + const int out_height = io->scaled_height; + const int uv_in_width = (io->mb_w + 1) >> 1; + const int uv_in_height = (io->mb_h + 1) >> 1; + const size_t work_size = 2 * out_width; // scratch memory for one rescaler + int32_t* work; // rescalers work area + uint8_t* tmp; // tmp storage for scaled YUV444 samples before RGB conversion + size_t tmp_size1, tmp_size2; + + tmp_size1 = 3 * work_size; + tmp_size2 = 3 * out_width; + if (has_alpha) { + tmp_size1 += work_size; + tmp_size2 += out_width; + } + p->memory = calloc(1, tmp_size1 * sizeof(*work) + tmp_size2 * sizeof(*tmp)); + if (p->memory == NULL) { + return 0; // memory error + } + work = (int32_t*)p->memory; + tmp = (uint8_t*)(work + tmp_size1); + WebPRescalerInit(&p->scaler_y, io->mb_w, io->mb_h, + tmp + 0 * out_width, out_width, out_height, 0, 1, + io->mb_w, out_width, io->mb_h, out_height, + work + 0 * work_size); + WebPRescalerInit(&p->scaler_u, uv_in_width, uv_in_height, + tmp + 1 * out_width, out_width, out_height, 0, 1, + io->mb_w, 2 * out_width, io->mb_h, 2 * out_height, + work + 1 * work_size); + WebPRescalerInit(&p->scaler_v, uv_in_width, uv_in_height, + tmp + 2 * out_width, out_width, out_height, 0, 1, + io->mb_w, 2 * out_width, io->mb_h, 2 * out_height, + work + 2 * work_size); + p->emit = EmitRescaledRGB; + + if (has_alpha) { + WebPRescalerInit(&p->scaler_a, io->mb_w, io->mb_h, + tmp + 3 * out_width, out_width, out_height, 0, 1, + io->mb_w, out_width, io->mb_h, out_height, + work + 3 * work_size); + p->emit_alpha = EmitRescaledAlphaRGB; + if (p->output->colorspace == MODE_RGBA_4444 || + p->output->colorspace == MODE_rgbA_4444) { + p->emit_alpha_row = ExportAlphaRGBA4444; + } else { + p->emit_alpha_row = ExportAlpha; + } + } + return 1; +} + +//------------------------------------------------------------------------------ +// Default custom functions + +static int CustomSetup(VP8Io* io) { + WebPDecParams* const p = (WebPDecParams*)io->opaque; + const WEBP_CSP_MODE colorspace = p->output->colorspace; + const int is_rgb = WebPIsRGBMode(colorspace); + const int is_alpha = WebPIsAlphaMode(colorspace); + + p->memory = NULL; + p->emit = NULL; + p->emit_alpha = NULL; + p->emit_alpha_row = NULL; + if (!WebPIoInitFromOptions(p->options, io, is_alpha ? MODE_YUV : MODE_YUVA)) { + return 0; + } + + if (io->use_scaling) { + const int ok = is_rgb ? InitRGBRescaler(io, p) : InitYUVRescaler(io, p); + if (!ok) { + return 0; // memory error + } + } else { + if (is_rgb) { + p->emit = EmitSampledRGB; // default +#ifdef FANCY_UPSAMPLING + if (io->fancy_upsampling) { + const int uv_width = (io->mb_w + 1) >> 1; + p->memory = malloc(io->mb_w + 2 * uv_width); + if (p->memory == NULL) { + return 0; // memory error. + } + p->tmp_y = (uint8_t*)p->memory; + p->tmp_u = p->tmp_y + io->mb_w; + p->tmp_v = p->tmp_u + uv_width; + p->emit = EmitFancyRGB; + WebPInitUpsamplers(); + } +#endif + } else { + p->emit = EmitYUV; + } + if (is_alpha) { // need transparency output + if (WebPIsPremultipliedMode(colorspace)) WebPInitPremultiply(); + p->emit_alpha = + (colorspace == MODE_RGBA_4444 || colorspace == MODE_rgbA_4444) ? + EmitAlphaRGBA4444 + : is_rgb ? EmitAlphaRGB + : EmitAlphaYUV; + } + } + + if (is_rgb) { + VP8YUVInit(); + } + return 1; +} + +//------------------------------------------------------------------------------ + +static int CustomPut(const VP8Io* io) { + WebPDecParams* const p = (WebPDecParams*)io->opaque; + const int mb_w = io->mb_w; + const int mb_h = io->mb_h; + int num_lines_out; + assert(!(io->mb_y & 1)); + + if (mb_w <= 0 || mb_h <= 0) { + return 0; + } + num_lines_out = p->emit(io, p); + if (p->emit_alpha) { + p->emit_alpha(io, p); + } + p->last_y += num_lines_out; + return 1; +} + +//------------------------------------------------------------------------------ + +static void CustomTeardown(const VP8Io* io) { + WebPDecParams* const p = (WebPDecParams*)io->opaque; + free(p->memory); + p->memory = NULL; +} + +//------------------------------------------------------------------------------ +// Main entry point + +void WebPInitCustomIo(WebPDecParams* const params, VP8Io* const io) { + io->put = CustomPut; + io->setup = CustomSetup; + io->teardown = CustomTeardown; + io->opaque = params; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webp/dec/layer.c b/drivers/webpold/dec/layer.c index a3a5bdcfe8..a3a5bdcfe8 100644 --- a/drivers/webp/dec/layer.c +++ b/drivers/webpold/dec/layer.c diff --git a/drivers/webpold/dec/quant.c b/drivers/webpold/dec/quant.c new file mode 100644 index 0000000000..d54097af0d --- /dev/null +++ b/drivers/webpold/dec/quant.c @@ -0,0 +1,113 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Quantizer initialization +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./vp8i.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +static WEBP_INLINE int clip(int v, int M) { + return v < 0 ? 0 : v > M ? M : v; +} + +// Paragraph 14.1 +static const uint8_t kDcTable[128] = { + 4, 5, 6, 7, 8, 9, 10, 10, + 11, 12, 13, 14, 15, 16, 17, 17, + 18, 19, 20, 20, 21, 21, 22, 22, + 23, 23, 24, 25, 25, 26, 27, 28, + 29, 30, 31, 32, 33, 34, 35, 36, + 37, 37, 38, 39, 40, 41, 42, 43, + 44, 45, 46, 46, 47, 48, 49, 50, + 51, 52, 53, 54, 55, 56, 57, 58, + 59, 60, 61, 62, 63, 64, 65, 66, + 67, 68, 69, 70, 71, 72, 73, 74, + 75, 76, 76, 77, 78, 79, 80, 81, + 82, 83, 84, 85, 86, 87, 88, 89, + 91, 93, 95, 96, 98, 100, 101, 102, + 104, 106, 108, 110, 112, 114, 116, 118, + 122, 124, 126, 128, 130, 132, 134, 136, + 138, 140, 143, 145, 148, 151, 154, 157 +}; + +static const uint16_t kAcTable[128] = { + 4, 5, 6, 7, 8, 9, 10, 11, + 12, 13, 14, 15, 16, 17, 18, 19, + 20, 21, 22, 23, 24, 25, 26, 27, + 28, 29, 30, 31, 32, 33, 34, 35, + 36, 37, 38, 39, 40, 41, 42, 43, + 44, 45, 46, 47, 48, 49, 50, 51, + 52, 53, 54, 55, 56, 57, 58, 60, + 62, 64, 66, 68, 70, 72, 74, 76, + 78, 80, 82, 84, 86, 88, 90, 92, + 94, 96, 98, 100, 102, 104, 106, 108, + 110, 112, 114, 116, 119, 122, 125, 128, + 131, 134, 137, 140, 143, 146, 149, 152, + 155, 158, 161, 164, 167, 170, 173, 177, + 181, 185, 189, 193, 197, 201, 205, 209, + 213, 217, 221, 225, 229, 234, 239, 245, + 249, 254, 259, 264, 269, 274, 279, 284 +}; + +//------------------------------------------------------------------------------ +// Paragraph 9.6 + +void VP8ParseQuant(VP8Decoder* const dec) { + VP8BitReader* const br = &dec->br_; + const int base_q0 = VP8GetValue(br, 7); + const int dqy1_dc = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0; + const int dqy2_dc = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0; + const int dqy2_ac = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0; + const int dquv_dc = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0; + const int dquv_ac = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0; + + const VP8SegmentHeader* const hdr = &dec->segment_hdr_; + int i; + + for (i = 0; i < NUM_MB_SEGMENTS; ++i) { + int q; + if (hdr->use_segment_) { + q = hdr->quantizer_[i]; + if (!hdr->absolute_delta_) { + q += base_q0; + } + } else { + if (i > 0) { + dec->dqm_[i] = dec->dqm_[0]; + continue; + } else { + q = base_q0; + } + } + { + VP8QuantMatrix* const m = &dec->dqm_[i]; + m->y1_mat_[0] = kDcTable[clip(q + dqy1_dc, 127)]; + m->y1_mat_[1] = kAcTable[clip(q + 0, 127)]; + + m->y2_mat_[0] = kDcTable[clip(q + dqy2_dc, 127)] * 2; + // For all x in [0..284], x*155/100 is bitwise equal to (x*101581) >> 16. + // The smallest precision for that is '(x*6349) >> 12' but 16 is a good + // word size. + m->y2_mat_[1] = (kAcTable[clip(q + dqy2_ac, 127)] * 101581) >> 16; + if (m->y2_mat_[1] < 8) m->y2_mat_[1] = 8; + + m->uv_mat_[0] = kDcTable[clip(q + dquv_dc, 117)]; + m->uv_mat_[1] = kAcTable[clip(q + dquv_ac, 127)]; + } + } +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/tree.c b/drivers/webpold/dec/tree.c new file mode 100644 index 0000000000..82484e4c55 --- /dev/null +++ b/drivers/webpold/dec/tree.c @@ -0,0 +1,589 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Coding trees and probas +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "vp8i.h" + +#define USE_GENERIC_TREE + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#ifdef USE_GENERIC_TREE +static const int8_t kYModesIntra4[18] = { + -B_DC_PRED, 1, + -B_TM_PRED, 2, + -B_VE_PRED, 3, + 4, 6, + -B_HE_PRED, 5, + -B_RD_PRED, -B_VR_PRED, + -B_LD_PRED, 7, + -B_VL_PRED, 8, + -B_HD_PRED, -B_HU_PRED +}; +#endif + +#ifndef ONLY_KEYFRAME_CODE + +// inter prediction modes +enum { + LEFT4 = 0, ABOVE4 = 1, ZERO4 = 2, NEW4 = 3, + NEARESTMV, NEARMV, ZEROMV, NEWMV, SPLITMV }; + +static const int8_t kYModesInter[8] = { + -DC_PRED, 1, + 2, 3, + -V_PRED, -H_PRED, + -TM_PRED, -B_PRED +}; + +static const int8_t kMBSplit[6] = { + -3, 1, + -2, 2, + -0, -1 +}; + +static const int8_t kMVRef[8] = { + -ZEROMV, 1, + -NEARESTMV, 2, + -NEARMV, 3, + -NEWMV, -SPLITMV +}; + +static const int8_t kMVRef4[6] = { + -LEFT4, 1, + -ABOVE4, 2, + -ZERO4, -NEW4 +}; +#endif + +//------------------------------------------------------------------------------ +// Default probabilities + +// Inter +#ifndef ONLY_KEYFRAME_CODE +static const uint8_t kYModeProbaInter0[4] = { 112, 86, 140, 37 }; +static const uint8_t kUVModeProbaInter0[3] = { 162, 101, 204 }; +static const uint8_t kMVProba0[2][NUM_MV_PROBAS] = { + { 162, 128, 225, 146, 172, 147, 214, 39, + 156, 128, 129, 132, 75, 145, 178, 206, + 239, 254, 254 }, + { 164, 128, 204, 170, 119, 235, 140, 230, + 228, 128, 130, 130, 74, 148, 180, 203, + 236, 254, 254 } +}; +#endif + +// Paragraph 13.5 +static const uint8_t + CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { + // genereated using vp8_default_coef_probs() in entropy.c:129 + { { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } + }, + { { 253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128 }, + { 189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128 }, + { 106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128 } + }, + { { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128 }, + { 181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128 }, + { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128 }, + }, + { { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128 }, + { 184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128 }, + { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128 }, + }, + { { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128 }, + { 170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128 }, + { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128 } + }, + { { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128 }, + { 207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128 }, + { 102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128 } + }, + { { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128 }, + { 177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128 }, + { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128 } + }, + { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } + } + }, + { { { 198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62 }, + { 131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1 }, + { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128 } + }, + { { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128 }, + { 184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128 }, + { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128 } + }, + { { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128 }, + { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128 }, + { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128 } + }, + { { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128 }, + { 109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128 }, + { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128 } + }, + { { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128 }, + { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128 }, + { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128 } + }, + { { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128 }, + { 124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128 }, + { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128 } + }, + { { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128 }, + { 121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128 }, + { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128 } + }, + { { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128 }, + { 203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128 } + } + }, + { { { 253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128 }, + { 175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128 }, + { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128 } + }, + { { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128 }, + { 239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128 }, + { 155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128 } + }, + { { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128 }, + { 201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128 }, + { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128 } + }, + { { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128 }, + { 141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128 } + }, + { { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128 }, + { 149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } + }, + { { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128 } + }, + { { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128 } + }, + { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } + } + }, + { { { 202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255 }, + { 126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128 }, + { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128 } + }, + { { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128 }, + { 166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128 }, + { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128 } + }, + { { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128 }, + { 124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128 }, + { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128 } + }, + { { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128 }, + { 149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128 }, + { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128 } + }, + { { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128 }, + { 123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128 }, + { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128 } + }, + { { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128 }, + { 168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128 }, + { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128 } + }, + { { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128 }, + { 141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128 }, + { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128 } + }, + { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } + } + } +}; + +// Paragraph 11.5 +static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = { + { { 231, 120, 48, 89, 115, 113, 120, 152, 112 }, + { 152, 179, 64, 126, 170, 118, 46, 70, 95 }, + { 175, 69, 143, 80, 85, 82, 72, 155, 103 }, + { 56, 58, 10, 171, 218, 189, 17, 13, 152 }, + { 114, 26, 17, 163, 44, 195, 21, 10, 173 }, + { 121, 24, 80, 195, 26, 62, 44, 64, 85 }, + { 144, 71, 10, 38, 171, 213, 144, 34, 26 }, + { 170, 46, 55, 19, 136, 160, 33, 206, 71 }, + { 63, 20, 8, 114, 114, 208, 12, 9, 226 }, + { 81, 40, 11, 96, 182, 84, 29, 16, 36 } }, + { { 134, 183, 89, 137, 98, 101, 106, 165, 148 }, + { 72, 187, 100, 130, 157, 111, 32, 75, 80 }, + { 66, 102, 167, 99, 74, 62, 40, 234, 128 }, + { 41, 53, 9, 178, 241, 141, 26, 8, 107 }, + { 74, 43, 26, 146, 73, 166, 49, 23, 157 }, + { 65, 38, 105, 160, 51, 52, 31, 115, 128 }, + { 104, 79, 12, 27, 217, 255, 87, 17, 7 }, + { 87, 68, 71, 44, 114, 51, 15, 186, 23 }, + { 47, 41, 14, 110, 182, 183, 21, 17, 194 }, + { 66, 45, 25, 102, 197, 189, 23, 18, 22 } }, + { { 88, 88, 147, 150, 42, 46, 45, 196, 205 }, + { 43, 97, 183, 117, 85, 38, 35, 179, 61 }, + { 39, 53, 200, 87, 26, 21, 43, 232, 171 }, + { 56, 34, 51, 104, 114, 102, 29, 93, 77 }, + { 39, 28, 85, 171, 58, 165, 90, 98, 64 }, + { 34, 22, 116, 206, 23, 34, 43, 166, 73 }, + { 107, 54, 32, 26, 51, 1, 81, 43, 31 }, + { 68, 25, 106, 22, 64, 171, 36, 225, 114 }, + { 34, 19, 21, 102, 132, 188, 16, 76, 124 }, + { 62, 18, 78, 95, 85, 57, 50, 48, 51 } }, + { { 193, 101, 35, 159, 215, 111, 89, 46, 111 }, + { 60, 148, 31, 172, 219, 228, 21, 18, 111 }, + { 112, 113, 77, 85, 179, 255, 38, 120, 114 }, + { 40, 42, 1, 196, 245, 209, 10, 25, 109 }, + { 88, 43, 29, 140, 166, 213, 37, 43, 154 }, + { 61, 63, 30, 155, 67, 45, 68, 1, 209 }, + { 100, 80, 8, 43, 154, 1, 51, 26, 71 }, + { 142, 78, 78, 16, 255, 128, 34, 197, 171 }, + { 41, 40, 5, 102, 211, 183, 4, 1, 221 }, + { 51, 50, 17, 168, 209, 192, 23, 25, 82 } }, + { { 138, 31, 36, 171, 27, 166, 38, 44, 229 }, + { 67, 87, 58, 169, 82, 115, 26, 59, 179 }, + { 63, 59, 90, 180, 59, 166, 93, 73, 154 }, + { 40, 40, 21, 116, 143, 209, 34, 39, 175 }, + { 47, 15, 16, 183, 34, 223, 49, 45, 183 }, + { 46, 17, 33, 183, 6, 98, 15, 32, 183 }, + { 57, 46, 22, 24, 128, 1, 54, 17, 37 }, + { 65, 32, 73, 115, 28, 128, 23, 128, 205 }, + { 40, 3, 9, 115, 51, 192, 18, 6, 223 }, + { 87, 37, 9, 115, 59, 77, 64, 21, 47 } }, + { { 104, 55, 44, 218, 9, 54, 53, 130, 226 }, + { 64, 90, 70, 205, 40, 41, 23, 26, 57 }, + { 54, 57, 112, 184, 5, 41, 38, 166, 213 }, + { 30, 34, 26, 133, 152, 116, 10, 32, 134 }, + { 39, 19, 53, 221, 26, 114, 32, 73, 255 }, + { 31, 9, 65, 234, 2, 15, 1, 118, 73 }, + { 75, 32, 12, 51, 192, 255, 160, 43, 51 }, + { 88, 31, 35, 67, 102, 85, 55, 186, 85 }, + { 56, 21, 23, 111, 59, 205, 45, 37, 192 }, + { 55, 38, 70, 124, 73, 102, 1, 34, 98 } }, + { { 125, 98, 42, 88, 104, 85, 117, 175, 82 }, + { 95, 84, 53, 89, 128, 100, 113, 101, 45 }, + { 75, 79, 123, 47, 51, 128, 81, 171, 1 }, + { 57, 17, 5, 71, 102, 57, 53, 41, 49 }, + { 38, 33, 13, 121, 57, 73, 26, 1, 85 }, + { 41, 10, 67, 138, 77, 110, 90, 47, 114 }, + { 115, 21, 2, 10, 102, 255, 166, 23, 6 }, + { 101, 29, 16, 10, 85, 128, 101, 196, 26 }, + { 57, 18, 10, 102, 102, 213, 34, 20, 43 }, + { 117, 20, 15, 36, 163, 128, 68, 1, 26 } }, + { { 102, 61, 71, 37, 34, 53, 31, 243, 192 }, + { 69, 60, 71, 38, 73, 119, 28, 222, 37 }, + { 68, 45, 128, 34, 1, 47, 11, 245, 171 }, + { 62, 17, 19, 70, 146, 85, 55, 62, 70 }, + { 37, 43, 37, 154, 100, 163, 85, 160, 1 }, + { 63, 9, 92, 136, 28, 64, 32, 201, 85 }, + { 75, 15, 9, 9, 64, 255, 184, 119, 16 }, + { 86, 6, 28, 5, 64, 255, 25, 248, 1 }, + { 56, 8, 17, 132, 137, 255, 55, 116, 128 }, + { 58, 15, 20, 82, 135, 57, 26, 121, 40 } }, + { { 164, 50, 31, 137, 154, 133, 25, 35, 218 }, + { 51, 103, 44, 131, 131, 123, 31, 6, 158 }, + { 86, 40, 64, 135, 148, 224, 45, 183, 128 }, + { 22, 26, 17, 131, 240, 154, 14, 1, 209 }, + { 45, 16, 21, 91, 64, 222, 7, 1, 197 }, + { 56, 21, 39, 155, 60, 138, 23, 102, 213 }, + { 83, 12, 13, 54, 192, 255, 68, 47, 28 }, + { 85, 26, 85, 85, 128, 128, 32, 146, 171 }, + { 18, 11, 7, 63, 144, 171, 4, 4, 246 }, + { 35, 27, 10, 146, 174, 171, 12, 26, 128 } }, + { { 190, 80, 35, 99, 180, 80, 126, 54, 45 }, + { 85, 126, 47, 87, 176, 51, 41, 20, 32 }, + { 101, 75, 128, 139, 118, 146, 116, 128, 85 }, + { 56, 41, 15, 176, 236, 85, 37, 9, 62 }, + { 71, 30, 17, 119, 118, 255, 17, 18, 138 }, + { 101, 38, 60, 138, 55, 70, 43, 26, 142 }, + { 146, 36, 19, 30, 171, 255, 97, 27, 20 }, + { 138, 45, 61, 62, 219, 1, 81, 188, 64 }, + { 32, 41, 20, 117, 151, 142, 20, 21, 163 }, + { 112, 19, 12, 61, 195, 128, 48, 4, 24 } } +}; + +void VP8ResetProba(VP8Proba* const proba) { + memset(proba->segments_, 255u, sizeof(proba->segments_)); + memcpy(proba->coeffs_, CoeffsProba0, sizeof(CoeffsProba0)); +#ifndef ONLY_KEYFRAME_CODE + memcpy(proba->mv_, kMVProba0, sizeof(kMVProba0)); + memcpy(proba->ymode_, kYModeProbaInter0, sizeof(kYModeProbaInter0)); + memcpy(proba->uvmode_, kUVModeProbaInter0, sizeof(kUVModeProbaInter0)); +#endif +} + +void VP8ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec) { + uint8_t* const top = dec->intra_t_ + 4 * dec->mb_x_; + uint8_t* const left = dec->intra_l_; + // Hardcoded 16x16 intra-mode decision tree. + dec->is_i4x4_ = !VP8GetBit(br, 145); // decide for B_PRED first + if (!dec->is_i4x4_) { + const int ymode = + VP8GetBit(br, 156) ? (VP8GetBit(br, 128) ? TM_PRED : H_PRED) + : (VP8GetBit(br, 163) ? V_PRED : DC_PRED); + dec->imodes_[0] = ymode; + memset(top, ymode, 4 * sizeof(top[0])); + memset(left, ymode, 4 * sizeof(left[0])); + } else { + uint8_t* modes = dec->imodes_; + int y; + for (y = 0; y < 4; ++y) { + int ymode = left[y]; + int x; + for (x = 0; x < 4; ++x) { + const uint8_t* const prob = kBModesProba[top[x]][ymode]; +#ifdef USE_GENERIC_TREE + // Generic tree-parsing + int i = 0; + do { + i = kYModesIntra4[2 * i + VP8GetBit(br, prob[i])]; + } while (i > 0); + ymode = -i; +#else + // Hardcoded tree parsing + ymode = !VP8GetBit(br, prob[0]) ? B_DC_PRED : + !VP8GetBit(br, prob[1]) ? B_TM_PRED : + !VP8GetBit(br, prob[2]) ? B_VE_PRED : + !VP8GetBit(br, prob[3]) ? + (!VP8GetBit(br, prob[4]) ? B_HE_PRED : + (!VP8GetBit(br, prob[5]) ? B_RD_PRED : B_VR_PRED)) : + (!VP8GetBit(br, prob[6]) ? B_LD_PRED : + (!VP8GetBit(br, prob[7]) ? B_VL_PRED : + (!VP8GetBit(br, prob[8]) ? B_HD_PRED : B_HU_PRED))); +#endif // USE_GENERIC_TREE + top[x] = ymode; + *modes++ = ymode; + } + left[y] = ymode; + } + } + // Hardcoded UVMode decision tree + dec->uvmode_ = !VP8GetBit(br, 142) ? DC_PRED + : !VP8GetBit(br, 114) ? V_PRED + : VP8GetBit(br, 183) ? TM_PRED : H_PRED; +} + +//------------------------------------------------------------------------------ +// Paragraph 13 + +static const uint8_t + CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { + { { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255 }, + { 250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + } + }, + { { { 217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255 }, + { 234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255 } + }, + { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + } + }, + { { { 186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255 }, + { 251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255 } + }, + { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + } + }, + { { { 248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255 }, + { 248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + } + } +}; + +#ifndef ONLY_KEYFRAME_CODE +static const uint8_t MVUpdateProba[2][NUM_MV_PROBAS] = { + { 237, 246, 253, 253, 254, 254, 254, 254, + 254, 254, 254, 254, 254, 254, 250, 250, + 252, 254, 254 }, + { 231, 243, 245, 253, 254, 254, 254, 254, + 254, 254, 254, 254, 254, 254, 251, 251, + 254, 254, 254 } +}; +#endif + +// Paragraph 9.9 +void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) { + VP8Proba* const proba = &dec->proba_; + int t, b, c, p; + for (t = 0; t < NUM_TYPES; ++t) { + for (b = 0; b < NUM_BANDS; ++b) { + for (c = 0; c < NUM_CTX; ++c) { + for (p = 0; p < NUM_PROBAS; ++p) { + if (VP8GetBit(br, CoeffsUpdateProba[t][b][c][p])) { + proba->coeffs_[t][b][c][p] = VP8GetValue(br, 8); + } + } + } + } + } + dec->use_skip_proba_ = VP8Get(br); + if (dec->use_skip_proba_) { + dec->skip_p_ = VP8GetValue(br, 8); + } +#ifndef ONLY_KEYFRAME_CODE + if (!dec->frm_hdr_.key_frame_) { + int i; + dec->intra_p_ = VP8GetValue(br, 8); + dec->last_p_ = VP8GetValue(br, 8); + dec->golden_p_ = VP8GetValue(br, 8); + if (VP8Get(br)) { // update y-mode + for (i = 0; i < 4; ++i) { + proba->ymode_[i] = VP8GetValue(br, 8); + } + } + if (VP8Get(br)) { // update uv-mode + for (i = 0; i < 3; ++i) { + proba->uvmode_[i] = VP8GetValue(br, 8); + } + } + // update MV + for (i = 0; i < 2; ++i) { + int k; + for (k = 0; k < NUM_MV_PROBAS; ++k) { + if (VP8GetBit(br, MVUpdateProba[i][k])) { + const int v = VP8GetValue(br, 7); + proba->mv_[i][k] = v ? v << 1 : 1; + } + } + } + } +#endif +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/vp8.c b/drivers/webpold/dec/vp8.c new file mode 100644 index 0000000000..b0ccfa2a06 --- /dev/null +++ b/drivers/webpold/dec/vp8.c @@ -0,0 +1,787 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// main entry for the decoder +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> + +#include "./vp8i.h" +#include "./vp8li.h" +#include "./webpi.h" +#include "../utils/bit_reader.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ + +int WebPGetDecoderVersion(void) { + return (DEC_MAJ_VERSION << 16) | (DEC_MIN_VERSION << 8) | DEC_REV_VERSION; +} + +//------------------------------------------------------------------------------ +// VP8Decoder + +static void SetOk(VP8Decoder* const dec) { + dec->status_ = VP8_STATUS_OK; + dec->error_msg_ = "OK"; +} + +int VP8InitIoInternal(VP8Io* const io, int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_DECODER_ABI_VERSION)) { + return 0; // mismatch error + } + if (io != NULL) { + memset(io, 0, sizeof(*io)); + } + return 1; +} + +VP8Decoder* VP8New(void) { + VP8Decoder* const dec = (VP8Decoder*)calloc(1, sizeof(*dec)); + if (dec != NULL) { + SetOk(dec); + WebPWorkerInit(&dec->worker_); + dec->ready_ = 0; + dec->num_parts_ = 1; + } + return dec; +} + +VP8StatusCode VP8Status(VP8Decoder* const dec) { + if (!dec) return VP8_STATUS_INVALID_PARAM; + return dec->status_; +} + +const char* VP8StatusMessage(VP8Decoder* const dec) { + if (dec == NULL) return "no object"; + if (!dec->error_msg_) return "OK"; + return dec->error_msg_; +} + +void VP8Delete(VP8Decoder* const dec) { + if (dec != NULL) { + VP8Clear(dec); + free(dec); + } +} + +int VP8SetError(VP8Decoder* const dec, + VP8StatusCode error, const char* const msg) { + // TODO This check would be unnecessary if alpha decompression was separated + // from VP8ProcessRow/FinishRow. This avoids setting 'dec->status_' to + // something other than VP8_STATUS_BITSTREAM_ERROR on alpha decompression + // failure. + if (dec->status_ == VP8_STATUS_OK) { + dec->status_ = error; + dec->error_msg_ = msg; + dec->ready_ = 0; + } + return 0; +} + +//------------------------------------------------------------------------------ + +int VP8CheckSignature(const uint8_t* const data, size_t data_size) { + return (data_size >= 3 && + data[0] == 0x9d && data[1] == 0x01 && data[2] == 0x2a); +} + +int VP8GetInfo(const uint8_t* data, size_t data_size, size_t chunk_size, + int* const width, int* const height) { + if (data == NULL || data_size < VP8_FRAME_HEADER_SIZE) { + return 0; // not enough data + } + // check signature + if (!VP8CheckSignature(data + 3, data_size - 3)) { + return 0; // Wrong signature. + } else { + const uint32_t bits = data[0] | (data[1] << 8) | (data[2] << 16); + const int key_frame = !(bits & 1); + const int w = ((data[7] << 8) | data[6]) & 0x3fff; + const int h = ((data[9] << 8) | data[8]) & 0x3fff; + + if (!key_frame) { // Not a keyframe. + return 0; + } + + if (((bits >> 1) & 7) > 3) { + return 0; // unknown profile + } + if (!((bits >> 4) & 1)) { + return 0; // first frame is invisible! + } + if (((bits >> 5)) >= chunk_size) { // partition_length + return 0; // inconsistent size information. + } + + if (width) { + *width = w; + } + if (height) { + *height = h; + } + + return 1; + } +} + +//------------------------------------------------------------------------------ +// Header parsing + +static void ResetSegmentHeader(VP8SegmentHeader* const hdr) { + assert(hdr != NULL); + hdr->use_segment_ = 0; + hdr->update_map_ = 0; + hdr->absolute_delta_ = 1; + memset(hdr->quantizer_, 0, sizeof(hdr->quantizer_)); + memset(hdr->filter_strength_, 0, sizeof(hdr->filter_strength_)); +} + +// Paragraph 9.3 +static int ParseSegmentHeader(VP8BitReader* br, + VP8SegmentHeader* hdr, VP8Proba* proba) { + assert(br != NULL); + assert(hdr != NULL); + hdr->use_segment_ = VP8Get(br); + if (hdr->use_segment_) { + hdr->update_map_ = VP8Get(br); + if (VP8Get(br)) { // update data + int s; + hdr->absolute_delta_ = VP8Get(br); + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + hdr->quantizer_[s] = VP8Get(br) ? VP8GetSignedValue(br, 7) : 0; + } + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + hdr->filter_strength_[s] = VP8Get(br) ? VP8GetSignedValue(br, 6) : 0; + } + } + if (hdr->update_map_) { + int s; + for (s = 0; s < MB_FEATURE_TREE_PROBS; ++s) { + proba->segments_[s] = VP8Get(br) ? VP8GetValue(br, 8) : 255u; + } + } + } else { + hdr->update_map_ = 0; + } + return !br->eof_; +} + +// Paragraph 9.5 +// This function returns VP8_STATUS_SUSPENDED if we don't have all the +// necessary data in 'buf'. +// This case is not necessarily an error (for incremental decoding). +// Still, no bitreader is ever initialized to make it possible to read +// unavailable memory. +// If we don't even have the partitions' sizes, than VP8_STATUS_NOT_ENOUGH_DATA +// is returned, and this is an unrecoverable error. +// If the partitions were positioned ok, VP8_STATUS_OK is returned. +static VP8StatusCode ParsePartitions(VP8Decoder* const dec, + const uint8_t* buf, size_t size) { + VP8BitReader* const br = &dec->br_; + const uint8_t* sz = buf; + const uint8_t* buf_end = buf + size; + const uint8_t* part_start; + int last_part; + int p; + + dec->num_parts_ = 1 << VP8GetValue(br, 2); + last_part = dec->num_parts_ - 1; + part_start = buf + last_part * 3; + if (buf_end < part_start) { + // we can't even read the sizes with sz[]! That's a failure. + return VP8_STATUS_NOT_ENOUGH_DATA; + } + for (p = 0; p < last_part; ++p) { + const uint32_t psize = sz[0] | (sz[1] << 8) | (sz[2] << 16); + const uint8_t* part_end = part_start + psize; + if (part_end > buf_end) part_end = buf_end; + VP8InitBitReader(dec->parts_ + p, part_start, part_end); + part_start = part_end; + sz += 3; + } + VP8InitBitReader(dec->parts_ + last_part, part_start, buf_end); + return (part_start < buf_end) ? VP8_STATUS_OK : + VP8_STATUS_SUSPENDED; // Init is ok, but there's not enough data +} + +// Paragraph 9.4 +static int ParseFilterHeader(VP8BitReader* br, VP8Decoder* const dec) { + VP8FilterHeader* const hdr = &dec->filter_hdr_; + hdr->simple_ = VP8Get(br); + hdr->level_ = VP8GetValue(br, 6); + hdr->sharpness_ = VP8GetValue(br, 3); + hdr->use_lf_delta_ = VP8Get(br); + if (hdr->use_lf_delta_) { + if (VP8Get(br)) { // update lf-delta? + int i; + for (i = 0; i < NUM_REF_LF_DELTAS; ++i) { + if (VP8Get(br)) { + hdr->ref_lf_delta_[i] = VP8GetSignedValue(br, 6); + } + } + for (i = 0; i < NUM_MODE_LF_DELTAS; ++i) { + if (VP8Get(br)) { + hdr->mode_lf_delta_[i] = VP8GetSignedValue(br, 6); + } + } + } + } + dec->filter_type_ = (hdr->level_ == 0) ? 0 : hdr->simple_ ? 1 : 2; + if (dec->filter_type_ > 0) { // precompute filter levels per segment + if (dec->segment_hdr_.use_segment_) { + int s; + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + int strength = dec->segment_hdr_.filter_strength_[s]; + if (!dec->segment_hdr_.absolute_delta_) { + strength += hdr->level_; + } + dec->filter_levels_[s] = strength; + } + } else { + dec->filter_levels_[0] = hdr->level_; + } + } + return !br->eof_; +} + +// Topmost call +int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io) { + const uint8_t* buf; + size_t buf_size; + VP8FrameHeader* frm_hdr; + VP8PictureHeader* pic_hdr; + VP8BitReader* br; + VP8StatusCode status; + WebPHeaderStructure headers; + + if (dec == NULL) { + return 0; + } + SetOk(dec); + if (io == NULL) { + return VP8SetError(dec, VP8_STATUS_INVALID_PARAM, + "null VP8Io passed to VP8GetHeaders()"); + } + + // Process Pre-VP8 chunks. + headers.data = io->data; + headers.data_size = io->data_size; + status = WebPParseHeaders(&headers); + if (status != VP8_STATUS_OK) { + return VP8SetError(dec, status, "Incorrect/incomplete header."); + } + if (headers.is_lossless) { + return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, + "Unexpected lossless format encountered."); + } + + if (dec->alpha_data_ == NULL) { + assert(dec->alpha_data_size_ == 0); + // We have NOT set alpha data yet. Set it now. + // (This is to ensure that dec->alpha_data_ is NOT reset to NULL if + // WebPParseHeaders() is called more than once, as in incremental decoding + // case.) + dec->alpha_data_ = headers.alpha_data; + dec->alpha_data_size_ = headers.alpha_data_size; + } + + // Process the VP8 frame header. + buf = headers.data + headers.offset; + buf_size = headers.data_size - headers.offset; + assert(headers.data_size >= headers.offset); // WebPParseHeaders' guarantee + if (buf_size < 4) { + return VP8SetError(dec, VP8_STATUS_NOT_ENOUGH_DATA, + "Truncated header."); + } + + // Paragraph 9.1 + { + const uint32_t bits = buf[0] | (buf[1] << 8) | (buf[2] << 16); + frm_hdr = &dec->frm_hdr_; + frm_hdr->key_frame_ = !(bits & 1); + frm_hdr->profile_ = (bits >> 1) & 7; + frm_hdr->show_ = (bits >> 4) & 1; + frm_hdr->partition_length_ = (bits >> 5); + if (frm_hdr->profile_ > 3) + return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, + "Incorrect keyframe parameters."); + if (!frm_hdr->show_) + return VP8SetError(dec, VP8_STATUS_UNSUPPORTED_FEATURE, + "Frame not displayable."); + buf += 3; + buf_size -= 3; + } + + pic_hdr = &dec->pic_hdr_; + if (frm_hdr->key_frame_) { + // Paragraph 9.2 + if (buf_size < 7) { + return VP8SetError(dec, VP8_STATUS_NOT_ENOUGH_DATA, + "cannot parse picture header"); + } + if (!VP8CheckSignature(buf, buf_size)) { + return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, + "Bad code word"); + } + pic_hdr->width_ = ((buf[4] << 8) | buf[3]) & 0x3fff; + pic_hdr->xscale_ = buf[4] >> 6; // ratio: 1, 5/4 5/3 or 2 + pic_hdr->height_ = ((buf[6] << 8) | buf[5]) & 0x3fff; + pic_hdr->yscale_ = buf[6] >> 6; + buf += 7; + buf_size -= 7; + + dec->mb_w_ = (pic_hdr->width_ + 15) >> 4; + dec->mb_h_ = (pic_hdr->height_ + 15) >> 4; + // Setup default output area (can be later modified during io->setup()) + io->width = pic_hdr->width_; + io->height = pic_hdr->height_; + io->use_scaling = 0; + io->use_cropping = 0; + io->crop_top = 0; + io->crop_left = 0; + io->crop_right = io->width; + io->crop_bottom = io->height; + io->mb_w = io->width; // sanity check + io->mb_h = io->height; // ditto + + VP8ResetProba(&dec->proba_); + ResetSegmentHeader(&dec->segment_hdr_); + dec->segment_ = 0; // default for intra + } + + // Check if we have all the partition #0 available, and initialize dec->br_ + // to read this partition (and this partition only). + if (frm_hdr->partition_length_ > buf_size) { + return VP8SetError(dec, VP8_STATUS_NOT_ENOUGH_DATA, + "bad partition length"); + } + + br = &dec->br_; + VP8InitBitReader(br, buf, buf + frm_hdr->partition_length_); + buf += frm_hdr->partition_length_; + buf_size -= frm_hdr->partition_length_; + + if (frm_hdr->key_frame_) { + pic_hdr->colorspace_ = VP8Get(br); + pic_hdr->clamp_type_ = VP8Get(br); + } + if (!ParseSegmentHeader(br, &dec->segment_hdr_, &dec->proba_)) { + return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, + "cannot parse segment header"); + } + // Filter specs + if (!ParseFilterHeader(br, dec)) { + return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, + "cannot parse filter header"); + } + status = ParsePartitions(dec, buf, buf_size); + if (status != VP8_STATUS_OK) { + return VP8SetError(dec, status, "cannot parse partitions"); + } + + // quantizer change + VP8ParseQuant(dec); + + // Frame buffer marking + if (!frm_hdr->key_frame_) { + // Paragraph 9.7 +#ifndef ONLY_KEYFRAME_CODE + dec->buffer_flags_ = VP8Get(br) << 0; // update golden + dec->buffer_flags_ |= VP8Get(br) << 1; // update alt ref + if (!(dec->buffer_flags_ & 1)) { + dec->buffer_flags_ |= VP8GetValue(br, 2) << 2; + } + if (!(dec->buffer_flags_ & 2)) { + dec->buffer_flags_ |= VP8GetValue(br, 2) << 4; + } + dec->buffer_flags_ |= VP8Get(br) << 6; // sign bias golden + dec->buffer_flags_ |= VP8Get(br) << 7; // sign bias alt ref +#else + return VP8SetError(dec, VP8_STATUS_UNSUPPORTED_FEATURE, + "Not a key frame."); +#endif + } else { + dec->buffer_flags_ = 0x003 | 0x100; + } + + // Paragraph 9.8 +#ifndef ONLY_KEYFRAME_CODE + dec->update_proba_ = VP8Get(br); + if (!dec->update_proba_) { // save for later restore + dec->proba_saved_ = dec->proba_; + } + dec->buffer_flags_ &= 1 << 8; + dec->buffer_flags_ |= + (frm_hdr->key_frame_ || VP8Get(br)) << 8; // refresh last frame +#else + VP8Get(br); // just ignore the value of update_proba_ +#endif + + VP8ParseProba(br, dec); + +#ifdef WEBP_EXPERIMENTAL_FEATURES + // Extensions + if (dec->pic_hdr_.colorspace_) { + const size_t kTrailerSize = 8; + const uint8_t kTrailerMarker = 0x01; + const uint8_t* ext_buf = buf - kTrailerSize; + size_t size; + + if (frm_hdr->partition_length_ < kTrailerSize || + ext_buf[kTrailerSize - 1] != kTrailerMarker) { + return VP8SetError(dec, VP8_STATUS_BITSTREAM_ERROR, + "RIFF: Inconsistent extra information."); + } + + // Layer + size = (ext_buf[0] << 0) | (ext_buf[1] << 8) | (ext_buf[2] << 16); + dec->layer_data_size_ = size; + dec->layer_data_ = NULL; // will be set later + dec->layer_colorspace_ = ext_buf[3]; + } +#endif + + // sanitized state + dec->ready_ = 1; + return 1; +} + +//------------------------------------------------------------------------------ +// Residual decoding (Paragraph 13.2 / 13.3) + +static const uint8_t kBands[16 + 1] = { + 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, + 0 // extra entry as sentinel +}; + +static const uint8_t kCat3[] = { 173, 148, 140, 0 }; +static const uint8_t kCat4[] = { 176, 155, 140, 135, 0 }; +static const uint8_t kCat5[] = { 180, 157, 141, 134, 130, 0 }; +static const uint8_t kCat6[] = + { 254, 254, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0 }; +static const uint8_t* const kCat3456[] = { kCat3, kCat4, kCat5, kCat6 }; +static const uint8_t kZigzag[16] = { + 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 +}; + +typedef const uint8_t (*ProbaArray)[NUM_CTX][NUM_PROBAS]; // for const-casting + +// Returns the position of the last non-zero coeff plus one +// (and 0 if there's no coeff at all) +static int GetCoeffs(VP8BitReader* const br, ProbaArray prob, + int ctx, const quant_t dq, int n, int16_t* out) { + // n is either 0 or 1 here. kBands[n] is not necessary for extracting '*p'. + const uint8_t* p = prob[n][ctx]; + if (!VP8GetBit(br, p[0])) { // first EOB is more a 'CBP' bit. + return 0; + } + while (1) { + ++n; + if (!VP8GetBit(br, p[1])) { + p = prob[kBands[n]][0]; + } else { // non zero coeff + int v, j; + if (!VP8GetBit(br, p[2])) { + p = prob[kBands[n]][1]; + v = 1; + } else { + if (!VP8GetBit(br, p[3])) { + if (!VP8GetBit(br, p[4])) { + v = 2; + } else { + v = 3 + VP8GetBit(br, p[5]); + } + } else { + if (!VP8GetBit(br, p[6])) { + if (!VP8GetBit(br, p[7])) { + v = 5 + VP8GetBit(br, 159); + } else { + v = 7 + 2 * VP8GetBit(br, 165); + v += VP8GetBit(br, 145); + } + } else { + const uint8_t* tab; + const int bit1 = VP8GetBit(br, p[8]); + const int bit0 = VP8GetBit(br, p[9 + bit1]); + const int cat = 2 * bit1 + bit0; + v = 0; + for (tab = kCat3456[cat]; *tab; ++tab) { + v += v + VP8GetBit(br, *tab); + } + v += 3 + (8 << cat); + } + } + p = prob[kBands[n]][2]; + } + j = kZigzag[n - 1]; + out[j] = VP8GetSigned(br, v) * dq[j > 0]; + if (n == 16 || !VP8GetBit(br, p[0])) { // EOB + return n; + } + } + if (n == 16) { + return 16; + } + } +} + +// Alias-safe way of converting 4bytes to 32bits. +typedef union { + uint8_t i8[4]; + uint32_t i32; +} PackedNz; + +// Table to unpack four bits into four bytes +static const PackedNz kUnpackTab[16] = { + {{0, 0, 0, 0}}, {{1, 0, 0, 0}}, {{0, 1, 0, 0}}, {{1, 1, 0, 0}}, + {{0, 0, 1, 0}}, {{1, 0, 1, 0}}, {{0, 1, 1, 0}}, {{1, 1, 1, 0}}, + {{0, 0, 0, 1}}, {{1, 0, 0, 1}}, {{0, 1, 0, 1}}, {{1, 1, 0, 1}}, + {{0, 0, 1, 1}}, {{1, 0, 1, 1}}, {{0, 1, 1, 1}}, {{1, 1, 1, 1}} }; + +// Macro to pack four LSB of four bytes into four bits. +#if defined(__PPC__) || defined(_M_PPC) || defined(_ARCH_PPC) || \ + defined(__BIG_ENDIAN__) +#define PACK_CST 0x08040201U +#else +#define PACK_CST 0x01020408U +#endif +#define PACK(X, S) ((((X).i32 * PACK_CST) & 0xff000000) >> (S)) + +static void ParseResiduals(VP8Decoder* const dec, + VP8MB* const mb, VP8BitReader* const token_br) { + int out_t_nz, out_l_nz, first; + ProbaArray ac_prob; + const VP8QuantMatrix* q = &dec->dqm_[dec->segment_]; + int16_t* dst = dec->coeffs_; + VP8MB* const left_mb = dec->mb_info_ - 1; + PackedNz nz_ac, nz_dc; + PackedNz tnz, lnz; + uint32_t non_zero_ac = 0; + uint32_t non_zero_dc = 0; + int x, y, ch; + + nz_dc.i32 = nz_ac.i32 = 0; + memset(dst, 0, 384 * sizeof(*dst)); + if (!dec->is_i4x4_) { // parse DC + int16_t dc[16] = { 0 }; + const int ctx = mb->dc_nz_ + left_mb->dc_nz_; + mb->dc_nz_ = left_mb->dc_nz_ = + (GetCoeffs(token_br, (ProbaArray)dec->proba_.coeffs_[1], + ctx, q->y2_mat_, 0, dc) > 0); + first = 1; + ac_prob = (ProbaArray)dec->proba_.coeffs_[0]; + VP8TransformWHT(dc, dst); + } else { + first = 0; + ac_prob = (ProbaArray)dec->proba_.coeffs_[3]; + } + + tnz = kUnpackTab[mb->nz_ & 0xf]; + lnz = kUnpackTab[left_mb->nz_ & 0xf]; + for (y = 0; y < 4; ++y) { + int l = lnz.i8[y]; + for (x = 0; x < 4; ++x) { + const int ctx = l + tnz.i8[x]; + const int nz = GetCoeffs(token_br, ac_prob, ctx, + q->y1_mat_, first, dst); + tnz.i8[x] = l = (nz > 0); + nz_dc.i8[x] = (dst[0] != 0); + nz_ac.i8[x] = (nz > 1); + dst += 16; + } + lnz.i8[y] = l; + non_zero_dc |= PACK(nz_dc, 24 - y * 4); + non_zero_ac |= PACK(nz_ac, 24 - y * 4); + } + out_t_nz = PACK(tnz, 24); + out_l_nz = PACK(lnz, 24); + + tnz = kUnpackTab[mb->nz_ >> 4]; + lnz = kUnpackTab[left_mb->nz_ >> 4]; + for (ch = 0; ch < 4; ch += 2) { + for (y = 0; y < 2; ++y) { + int l = lnz.i8[ch + y]; + for (x = 0; x < 2; ++x) { + const int ctx = l + tnz.i8[ch + x]; + const int nz = + GetCoeffs(token_br, (ProbaArray)dec->proba_.coeffs_[2], + ctx, q->uv_mat_, 0, dst); + tnz.i8[ch + x] = l = (nz > 0); + nz_dc.i8[y * 2 + x] = (dst[0] != 0); + nz_ac.i8[y * 2 + x] = (nz > 1); + dst += 16; + } + lnz.i8[ch + y] = l; + } + non_zero_dc |= PACK(nz_dc, 8 - ch * 2); + non_zero_ac |= PACK(nz_ac, 8 - ch * 2); + } + out_t_nz |= PACK(tnz, 20); + out_l_nz |= PACK(lnz, 20); + mb->nz_ = out_t_nz; + left_mb->nz_ = out_l_nz; + + dec->non_zero_ac_ = non_zero_ac; + dec->non_zero_ = non_zero_ac | non_zero_dc; + mb->skip_ = !dec->non_zero_; +} +#undef PACK + +//------------------------------------------------------------------------------ +// Main loop + +int VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br) { + VP8BitReader* const br = &dec->br_; + VP8MB* const left = dec->mb_info_ - 1; + VP8MB* const info = dec->mb_info_ + dec->mb_x_; + + // Note: we don't save segment map (yet), as we don't expect + // to decode more than 1 keyframe. + if (dec->segment_hdr_.update_map_) { + // Hardcoded tree parsing + dec->segment_ = !VP8GetBit(br, dec->proba_.segments_[0]) ? + VP8GetBit(br, dec->proba_.segments_[1]) : + 2 + VP8GetBit(br, dec->proba_.segments_[2]); + } + info->skip_ = dec->use_skip_proba_ ? VP8GetBit(br, dec->skip_p_) : 0; + + VP8ParseIntraMode(br, dec); + if (br->eof_) { + return 0; + } + + if (!info->skip_) { + ParseResiduals(dec, info, token_br); + } else { + left->nz_ = info->nz_ = 0; + if (!dec->is_i4x4_) { + left->dc_nz_ = info->dc_nz_ = 0; + } + dec->non_zero_ = 0; + dec->non_zero_ac_ = 0; + } + + return (!token_br->eof_); +} + +void VP8InitScanline(VP8Decoder* const dec) { + VP8MB* const left = dec->mb_info_ - 1; + left->nz_ = 0; + left->dc_nz_ = 0; + memset(dec->intra_l_, B_DC_PRED, sizeof(dec->intra_l_)); + dec->filter_row_ = + (dec->filter_type_ > 0) && + (dec->mb_y_ >= dec->tl_mb_y_) && (dec->mb_y_ <= dec->br_mb_y_); +} + +static int ParseFrame(VP8Decoder* const dec, VP8Io* io) { + for (dec->mb_y_ = 0; dec->mb_y_ < dec->br_mb_y_; ++dec->mb_y_) { + VP8BitReader* const token_br = + &dec->parts_[dec->mb_y_ & (dec->num_parts_ - 1)]; + VP8InitScanline(dec); + for (dec->mb_x_ = 0; dec->mb_x_ < dec->mb_w_; dec->mb_x_++) { + if (!VP8DecodeMB(dec, token_br)) { + return VP8SetError(dec, VP8_STATUS_NOT_ENOUGH_DATA, + "Premature end-of-file encountered."); + } + VP8ReconstructBlock(dec); + + // Store data and save block's filtering params + VP8StoreBlock(dec); + } + if (!VP8ProcessRow(dec, io)) { + return VP8SetError(dec, VP8_STATUS_USER_ABORT, "Output aborted."); + } + } + if (dec->use_threads_ && !WebPWorkerSync(&dec->worker_)) { + return 0; + } + + // Finish +#ifndef ONLY_KEYFRAME_CODE + if (!dec->update_proba_) { + dec->proba_ = dec->proba_saved_; + } +#endif + +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (dec->layer_data_size_ > 0) { + if (!VP8DecodeLayer(dec)) { + return 0; + } + } +#endif + + return 1; +} + +// Main entry point +int VP8Decode(VP8Decoder* const dec, VP8Io* const io) { + int ok = 0; + if (dec == NULL) { + return 0; + } + if (io == NULL) { + return VP8SetError(dec, VP8_STATUS_INVALID_PARAM, + "NULL VP8Io parameter in VP8Decode()."); + } + + if (!dec->ready_) { + if (!VP8GetHeaders(dec, io)) { + return 0; + } + } + assert(dec->ready_); + + // Finish setting up the decoding parameter. Will call io->setup(). + ok = (VP8EnterCritical(dec, io) == VP8_STATUS_OK); + if (ok) { // good to go. + // Will allocate memory and prepare everything. + if (ok) ok = VP8InitFrame(dec, io); + + // Main decoding loop + if (ok) ok = ParseFrame(dec, io); + + // Exit. + ok &= VP8ExitCritical(dec, io); + } + + if (!ok) { + VP8Clear(dec); + return 0; + } + + dec->ready_ = 0; + return ok; +} + +void VP8Clear(VP8Decoder* const dec) { + if (dec == NULL) { + return; + } + if (dec->use_threads_) { + WebPWorkerEnd(&dec->worker_); + } + if (dec->mem_) { + free(dec->mem_); + } + dec->mem_ = NULL; + dec->mem_size_ = 0; + memset(&dec->br_, 0, sizeof(dec->br_)); + dec->ready_ = 0; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/vp8i.h b/drivers/webpold/dec/vp8i.h new file mode 100644 index 0000000000..4382edfd8e --- /dev/null +++ b/drivers/webpold/dec/vp8i.h @@ -0,0 +1,335 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// VP8 decoder: internal header. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_DEC_VP8I_H_ +#define WEBP_DEC_VP8I_H_ + +#include <string.h> // for memcpy() +#include "./vp8li.h" +#include "../utils/bit_reader.h" +#include "../utils/thread.h" +#include "../dsp/dsp.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Various defines and enums + +// version numbers +#define DEC_MAJ_VERSION 0 +#define DEC_MIN_VERSION 2 +#define DEC_REV_VERSION 0 + +#define ONLY_KEYFRAME_CODE // to remove any code related to P-Frames + +// intra prediction modes +enum { B_DC_PRED = 0, // 4x4 modes + B_TM_PRED, + B_VE_PRED, + B_HE_PRED, + B_RD_PRED, + B_VR_PRED, + B_LD_PRED, + B_VL_PRED, + B_HD_PRED, + B_HU_PRED, + NUM_BMODES = B_HU_PRED + 1 - B_DC_PRED, // = 10 + + // Luma16 or UV modes + DC_PRED = B_DC_PRED, V_PRED = B_VE_PRED, + H_PRED = B_HE_PRED, TM_PRED = B_TM_PRED, + B_PRED = NUM_BMODES, // refined I4x4 mode + + // special modes + B_DC_PRED_NOTOP = 4, + B_DC_PRED_NOLEFT = 5, + B_DC_PRED_NOTOPLEFT = 6, + NUM_B_DC_MODES = 7 }; + +enum { MB_FEATURE_TREE_PROBS = 3, + NUM_MB_SEGMENTS = 4, + NUM_REF_LF_DELTAS = 4, + NUM_MODE_LF_DELTAS = 4, // I4x4, ZERO, *, SPLIT + MAX_NUM_PARTITIONS = 8, + // Probabilities + NUM_TYPES = 4, + NUM_BANDS = 8, + NUM_CTX = 3, + NUM_PROBAS = 11, + NUM_MV_PROBAS = 19 }; + +// YUV-cache parameters. +// Constraints are: We need to store one 16x16 block of luma samples (y), +// and two 8x8 chroma blocks (u/v). These are better be 16-bytes aligned, +// in order to be SIMD-friendly. We also need to store the top, left and +// top-left samples (from previously decoded blocks), along with four +// extra top-right samples for luma (intra4x4 prediction only). +// One possible layout is, using 32 * (17 + 9) bytes: +// +// .+------ <- only 1 pixel high +// .|yyyyt. +// .|yyyyt. +// .|yyyyt. +// .|yyyy.. +// .+--.+-- <- only 1 pixel high +// .|uu.|vv +// .|uu.|vv +// +// Every character is a 4x4 block, with legend: +// '.' = unused +// 'y' = y-samples 'u' = u-samples 'v' = u-samples +// '|' = left sample, '-' = top sample, '+' = top-left sample +// 't' = extra top-right sample for 4x4 modes +// With this layout, BPS (=Bytes Per Scan-line) is one cacheline size. +#define BPS 32 // this is the common stride used by yuv[] +#define YUV_SIZE (BPS * 17 + BPS * 9) +#define Y_SIZE (BPS * 17) +#define Y_OFF (BPS * 1 + 8) +#define U_OFF (Y_OFF + BPS * 16 + BPS) +#define V_OFF (U_OFF + 16) + +//------------------------------------------------------------------------------ +// Headers + +typedef struct { + uint8_t key_frame_; + uint8_t profile_; + uint8_t show_; + uint32_t partition_length_; +} VP8FrameHeader; + +typedef struct { + uint16_t width_; + uint16_t height_; + uint8_t xscale_; + uint8_t yscale_; + uint8_t colorspace_; // 0 = YCbCr + uint8_t clamp_type_; +} VP8PictureHeader; + +// segment features +typedef struct { + int use_segment_; + int update_map_; // whether to update the segment map or not + int absolute_delta_; // absolute or delta values for quantizer and filter + int8_t quantizer_[NUM_MB_SEGMENTS]; // quantization changes + int8_t filter_strength_[NUM_MB_SEGMENTS]; // filter strength for segments +} VP8SegmentHeader; + +// Struct collecting all frame-persistent probabilities. +typedef struct { + uint8_t segments_[MB_FEATURE_TREE_PROBS]; + // Type: 0:Intra16-AC 1:Intra16-DC 2:Chroma 3:Intra4 + uint8_t coeffs_[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS]; +#ifndef ONLY_KEYFRAME_CODE + uint8_t ymode_[4], uvmode_[3]; + uint8_t mv_[2][NUM_MV_PROBAS]; +#endif +} VP8Proba; + +// Filter parameters +typedef struct { + int simple_; // 0=complex, 1=simple + int level_; // [0..63] + int sharpness_; // [0..7] + int use_lf_delta_; + int ref_lf_delta_[NUM_REF_LF_DELTAS]; + int mode_lf_delta_[NUM_MODE_LF_DELTAS]; +} VP8FilterHeader; + +//------------------------------------------------------------------------------ +// Informations about the macroblocks. + +typedef struct { // filter specs + unsigned int f_level_:6; // filter strength: 0..63 + unsigned int f_ilevel_:6; // inner limit: 1..63 + unsigned int f_inner_:1; // do inner filtering? +} VP8FInfo; + +typedef struct { // used for syntax-parsing + unsigned int nz_; // non-zero AC/DC coeffs + unsigned int dc_nz_:1; // non-zero DC coeffs + unsigned int skip_:1; // block type +} VP8MB; + +// Dequantization matrices +typedef int quant_t[2]; // [DC / AC]. Can be 'uint16_t[2]' too (~slower). +typedef struct { + quant_t y1_mat_, y2_mat_, uv_mat_; +} VP8QuantMatrix; + +// Persistent information needed by the parallel processing +typedef struct { + int id_; // cache row to process (in [0..2]) + int mb_y_; // macroblock position of the row + int filter_row_; // true if row-filtering is needed + VP8FInfo* f_info_; // filter strengths + VP8Io io_; // copy of the VP8Io to pass to put() +} VP8ThreadContext; + +//------------------------------------------------------------------------------ +// VP8Decoder: the main opaque structure handed over to user + +struct VP8Decoder { + VP8StatusCode status_; + int ready_; // true if ready to decode a picture with VP8Decode() + const char* error_msg_; // set when status_ is not OK. + + // Main data source + VP8BitReader br_; + + // headers + VP8FrameHeader frm_hdr_; + VP8PictureHeader pic_hdr_; + VP8FilterHeader filter_hdr_; + VP8SegmentHeader segment_hdr_; + + // Worker + WebPWorker worker_; + int use_threads_; // use multi-thread + int cache_id_; // current cache row + int num_caches_; // number of cached rows of 16 pixels (1, 2 or 3) + VP8ThreadContext thread_ctx_; // Thread context + + // dimension, in macroblock units. + int mb_w_, mb_h_; + + // Macroblock to process/filter, depending on cropping and filter_type. + int tl_mb_x_, tl_mb_y_; // top-left MB that must be in-loop filtered + int br_mb_x_, br_mb_y_; // last bottom-right MB that must be decoded + + // number of partitions. + int num_parts_; + // per-partition boolean decoders. + VP8BitReader parts_[MAX_NUM_PARTITIONS]; + + // buffer refresh flags + // bit 0: refresh Gold, bit 1: refresh Alt + // bit 2-3: copy to Gold, bit 4-5: copy to Alt + // bit 6: Gold sign bias, bit 7: Alt sign bias + // bit 8: refresh last frame + uint32_t buffer_flags_; + + // dequantization (one set of DC/AC dequant factor per segment) + VP8QuantMatrix dqm_[NUM_MB_SEGMENTS]; + + // probabilities + VP8Proba proba_; + int use_skip_proba_; + uint8_t skip_p_; +#ifndef ONLY_KEYFRAME_CODE + uint8_t intra_p_, last_p_, golden_p_; + VP8Proba proba_saved_; + int update_proba_; +#endif + + // Boundary data cache and persistent buffers. + uint8_t* intra_t_; // top intra modes values: 4 * mb_w_ + uint8_t intra_l_[4]; // left intra modes values + uint8_t* y_t_; // top luma samples: 16 * mb_w_ + uint8_t* u_t_, *v_t_; // top u/v samples: 8 * mb_w_ each + + VP8MB* mb_info_; // contextual macroblock info (mb_w_ + 1) + VP8FInfo* f_info_; // filter strength info + uint8_t* yuv_b_; // main block for Y/U/V (size = YUV_SIZE) + int16_t* coeffs_; // 384 coeffs = (16+8+8) * 4*4 + + uint8_t* cache_y_; // macroblock row for storing unfiltered samples + uint8_t* cache_u_; + uint8_t* cache_v_; + int cache_y_stride_; + int cache_uv_stride_; + + // main memory chunk for the above data. Persistent. + void* mem_; + size_t mem_size_; + + // Per macroblock non-persistent infos. + int mb_x_, mb_y_; // current position, in macroblock units + uint8_t is_i4x4_; // true if intra4x4 + uint8_t imodes_[16]; // one 16x16 mode (#0) or sixteen 4x4 modes + uint8_t uvmode_; // chroma prediction mode + uint8_t segment_; // block's segment + + // bit-wise info about the content of each sub-4x4 blocks: there are 16 bits + // for luma (bits #0->#15), then 4 bits for chroma-u (#16->#19) and 4 bits for + // chroma-v (#20->#23), each corresponding to one 4x4 block in decoding order. + // If the bit is set, the 4x4 block contains some non-zero coefficients. + uint32_t non_zero_; + uint32_t non_zero_ac_; + + // Filtering side-info + int filter_type_; // 0=off, 1=simple, 2=complex + int filter_row_; // per-row flag + uint8_t filter_levels_[NUM_MB_SEGMENTS]; // precalculated per-segment + + // extensions + const uint8_t* alpha_data_; // compressed alpha data (if present) + size_t alpha_data_size_; + uint8_t* alpha_plane_; // output. Persistent, contains the whole data. + + int layer_colorspace_; + const uint8_t* layer_data_; // compressed layer data (if present) + size_t layer_data_size_; +}; + +//------------------------------------------------------------------------------ +// internal functions. Not public. + +// in vp8.c +int VP8SetError(VP8Decoder* const dec, + VP8StatusCode error, const char* const msg); + +// in tree.c +void VP8ResetProba(VP8Proba* const proba); +void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec); +void VP8ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec); + +// in quant.c +void VP8ParseQuant(VP8Decoder* const dec); + +// in frame.c +int VP8InitFrame(VP8Decoder* const dec, VP8Io* io); +// Predict a block and add residual +void VP8ReconstructBlock(VP8Decoder* const dec); +// Call io->setup() and finish setting up scan parameters. +// After this call returns, one must always call VP8ExitCritical() with the +// same parameters. Both functions should be used in pair. Returns VP8_STATUS_OK +// if ok, otherwise sets and returns the error status on *dec. +VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io); +// Must always be called in pair with VP8EnterCritical(). +// Returns false in case of error. +int VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io); +// Process the last decoded row (filtering + output) +int VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io); +// Store a block, along with filtering params +void VP8StoreBlock(VP8Decoder* const dec); +// To be called at the start of a new scanline, to initialize predictors. +void VP8InitScanline(VP8Decoder* const dec); +// Decode one macroblock. Returns false if there is not enough data. +int VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br); + +// in alpha.c +const uint8_t* VP8DecompressAlphaRows(VP8Decoder* const dec, + int row, int num_rows); + +// in layer.c +int VP8DecodeLayer(VP8Decoder* const dec); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_DEC_VP8I_H_ */ diff --git a/drivers/webpold/dec/vp8l.c b/drivers/webpold/dec/vp8l.c new file mode 100644 index 0000000000..897e4395c7 --- /dev/null +++ b/drivers/webpold/dec/vp8l.c @@ -0,0 +1,1200 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// main entry for the decoder +// +// Authors: Vikas Arora (vikaas.arora@gmail.com) +// Jyrki Alakuijala (jyrki@google.com) + +#include <stdio.h> +#include <stdlib.h> +#include "./vp8li.h" +#include "../dsp/lossless.h" +#include "../dsp/yuv.h" +#include "../utils/huffman.h" +#include "../utils/utils.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define NUM_ARGB_CACHE_ROWS 16 + +static const int kCodeLengthLiterals = 16; +static const int kCodeLengthRepeatCode = 16; +static const int kCodeLengthExtraBits[3] = { 2, 3, 7 }; +static const int kCodeLengthRepeatOffsets[3] = { 3, 3, 11 }; + +// ----------------------------------------------------------------------------- +// Five Huffman codes are used at each meta code: +// 1. green + length prefix codes + color cache codes, +// 2. alpha, +// 3. red, +// 4. blue, and, +// 5. distance prefix codes. +typedef enum { + GREEN = 0, + RED = 1, + BLUE = 2, + ALPHA = 3, + DIST = 4 +} HuffIndex; + +static const uint16_t kAlphabetSize[HUFFMAN_CODES_PER_META_CODE] = { + NUM_LITERAL_CODES + NUM_LENGTH_CODES, + NUM_LITERAL_CODES, NUM_LITERAL_CODES, NUM_LITERAL_CODES, + NUM_DISTANCE_CODES +}; + + +#define NUM_CODE_LENGTH_CODES 19 +static const uint8_t kCodeLengthCodeOrder[NUM_CODE_LENGTH_CODES] = { + 17, 18, 0, 1, 2, 3, 4, 5, 16, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 +}; + +#define CODE_TO_PLANE_CODES 120 +static const uint8_t code_to_plane_lut[CODE_TO_PLANE_CODES] = { + 0x18, 0x07, 0x17, 0x19, 0x28, 0x06, 0x27, 0x29, 0x16, 0x1a, + 0x26, 0x2a, 0x38, 0x05, 0x37, 0x39, 0x15, 0x1b, 0x36, 0x3a, + 0x25, 0x2b, 0x48, 0x04, 0x47, 0x49, 0x14, 0x1c, 0x35, 0x3b, + 0x46, 0x4a, 0x24, 0x2c, 0x58, 0x45, 0x4b, 0x34, 0x3c, 0x03, + 0x57, 0x59, 0x13, 0x1d, 0x56, 0x5a, 0x23, 0x2d, 0x44, 0x4c, + 0x55, 0x5b, 0x33, 0x3d, 0x68, 0x02, 0x67, 0x69, 0x12, 0x1e, + 0x66, 0x6a, 0x22, 0x2e, 0x54, 0x5c, 0x43, 0x4d, 0x65, 0x6b, + 0x32, 0x3e, 0x78, 0x01, 0x77, 0x79, 0x53, 0x5d, 0x11, 0x1f, + 0x64, 0x6c, 0x42, 0x4e, 0x76, 0x7a, 0x21, 0x2f, 0x75, 0x7b, + 0x31, 0x3f, 0x63, 0x6d, 0x52, 0x5e, 0x00, 0x74, 0x7c, 0x41, + 0x4f, 0x10, 0x20, 0x62, 0x6e, 0x30, 0x73, 0x7d, 0x51, 0x5f, + 0x40, 0x72, 0x7e, 0x61, 0x6f, 0x50, 0x71, 0x7f, 0x60, 0x70 +}; + +static int DecodeImageStream(int xsize, int ysize, + int is_level0, + VP8LDecoder* const dec, + uint32_t** const decoded_data); + +//------------------------------------------------------------------------------ + +int VP8LCheckSignature(const uint8_t* const data, size_t size) { + return (size >= 1) && (data[0] == VP8L_MAGIC_BYTE); +} + +static int ReadImageInfo(VP8LBitReader* const br, + int* const width, int* const height, + int* const has_alpha) { + const uint8_t signature = VP8LReadBits(br, 8); + if (!VP8LCheckSignature(&signature, 1)) { + return 0; + } + *width = VP8LReadBits(br, VP8L_IMAGE_SIZE_BITS) + 1; + *height = VP8LReadBits(br, VP8L_IMAGE_SIZE_BITS) + 1; + *has_alpha = VP8LReadBits(br, 1); + VP8LReadBits(br, VP8L_VERSION_BITS); // Read/ignore the version number. + return 1; +} + +int VP8LGetInfo(const uint8_t* data, size_t data_size, + int* const width, int* const height, int* const has_alpha) { + if (data == NULL || data_size < VP8L_FRAME_HEADER_SIZE) { + return 0; // not enough data + } else { + int w, h, a; + VP8LBitReader br; + VP8LInitBitReader(&br, data, data_size); + if (!ReadImageInfo(&br, &w, &h, &a)) { + return 0; + } + if (width != NULL) *width = w; + if (height != NULL) *height = h; + if (has_alpha != NULL) *has_alpha = a; + return 1; + } +} + +//------------------------------------------------------------------------------ + +static WEBP_INLINE int GetCopyDistance(int distance_symbol, + VP8LBitReader* const br) { + int extra_bits, offset; + if (distance_symbol < 4) { + return distance_symbol + 1; + } + extra_bits = (distance_symbol - 2) >> 1; + offset = (2 + (distance_symbol & 1)) << extra_bits; + return offset + VP8LReadBits(br, extra_bits) + 1; +} + +static WEBP_INLINE int GetCopyLength(int length_symbol, + VP8LBitReader* const br) { + // Length and distance prefixes are encoded the same way. + return GetCopyDistance(length_symbol, br); +} + +static WEBP_INLINE int PlaneCodeToDistance(int xsize, int plane_code) { + if (plane_code > CODE_TO_PLANE_CODES) { + return plane_code - CODE_TO_PLANE_CODES; + } else { + const int dist_code = code_to_plane_lut[plane_code - 1]; + const int yoffset = dist_code >> 4; + const int xoffset = 8 - (dist_code & 0xf); + const int dist = yoffset * xsize + xoffset; + return (dist >= 1) ? dist : 1; + } +} + +//------------------------------------------------------------------------------ +// Decodes the next Huffman code from bit-stream. +// FillBitWindow(br) needs to be called at minimum every second call +// to ReadSymbolUnsafe. +static int ReadSymbolUnsafe(const HuffmanTree* tree, VP8LBitReader* const br) { + const HuffmanTreeNode* node = tree->root_; + assert(node != NULL); + while (!HuffmanTreeNodeIsLeaf(node)) { + node = HuffmanTreeNextNode(node, VP8LReadOneBitUnsafe(br)); + } + return node->symbol_; +} + +static WEBP_INLINE int ReadSymbol(const HuffmanTree* tree, + VP8LBitReader* const br) { + const int read_safe = (br->pos_ + 8 > br->len_); + if (!read_safe) { + return ReadSymbolUnsafe(tree, br); + } else { + const HuffmanTreeNode* node = tree->root_; + assert(node != NULL); + while (!HuffmanTreeNodeIsLeaf(node)) { + node = HuffmanTreeNextNode(node, VP8LReadOneBit(br)); + } + return node->symbol_; + } +} + +static int ReadHuffmanCodeLengths( + VP8LDecoder* const dec, const int* const code_length_code_lengths, + int num_symbols, int* const code_lengths) { + int ok = 0; + VP8LBitReader* const br = &dec->br_; + int symbol; + int max_symbol; + int prev_code_len = DEFAULT_CODE_LENGTH; + HuffmanTree tree; + + if (!HuffmanTreeBuildImplicit(&tree, code_length_code_lengths, + NUM_CODE_LENGTH_CODES)) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + return 0; + } + + if (VP8LReadBits(br, 1)) { // use length + const int length_nbits = 2 + 2 * VP8LReadBits(br, 3); + max_symbol = 2 + VP8LReadBits(br, length_nbits); + if (max_symbol > num_symbols) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + goto End; + } + } else { + max_symbol = num_symbols; + } + + symbol = 0; + while (symbol < num_symbols) { + int code_len; + if (max_symbol-- == 0) break; + VP8LFillBitWindow(br); + code_len = ReadSymbol(&tree, br); + if (code_len < kCodeLengthLiterals) { + code_lengths[symbol++] = code_len; + if (code_len != 0) prev_code_len = code_len; + } else { + const int use_prev = (code_len == kCodeLengthRepeatCode); + const int slot = code_len - kCodeLengthLiterals; + const int extra_bits = kCodeLengthExtraBits[slot]; + const int repeat_offset = kCodeLengthRepeatOffsets[slot]; + int repeat = VP8LReadBits(br, extra_bits) + repeat_offset; + if (symbol + repeat > num_symbols) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + goto End; + } else { + const int length = use_prev ? prev_code_len : 0; + while (repeat-- > 0) code_lengths[symbol++] = length; + } + } + } + ok = 1; + + End: + HuffmanTreeRelease(&tree); + return ok; +} + +static int ReadHuffmanCode(int alphabet_size, VP8LDecoder* const dec, + HuffmanTree* const tree) { + int ok = 0; + VP8LBitReader* const br = &dec->br_; + const int simple_code = VP8LReadBits(br, 1); + + if (simple_code) { // Read symbols, codes & code lengths directly. + int symbols[2]; + int codes[2]; + int code_lengths[2]; + const int num_symbols = VP8LReadBits(br, 1) + 1; + const int first_symbol_len_code = VP8LReadBits(br, 1); + // The first code is either 1 bit or 8 bit code. + symbols[0] = VP8LReadBits(br, (first_symbol_len_code == 0) ? 1 : 8); + codes[0] = 0; + code_lengths[0] = num_symbols - 1; + // The second code (if present), is always 8 bit long. + if (num_symbols == 2) { + symbols[1] = VP8LReadBits(br, 8); + codes[1] = 1; + code_lengths[1] = num_symbols - 1; + } + ok = HuffmanTreeBuildExplicit(tree, code_lengths, codes, symbols, + alphabet_size, num_symbols); + } else { // Decode Huffman-coded code lengths. + int* code_lengths = NULL; + int i; + int code_length_code_lengths[NUM_CODE_LENGTH_CODES] = { 0 }; + const int num_codes = VP8LReadBits(br, 4) + 4; + if (num_codes > NUM_CODE_LENGTH_CODES) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + return 0; + } + + code_lengths = + (int*)WebPSafeCalloc((uint64_t)alphabet_size, sizeof(*code_lengths)); + if (code_lengths == NULL) { + dec->status_ = VP8_STATUS_OUT_OF_MEMORY; + return 0; + } + + for (i = 0; i < num_codes; ++i) { + code_length_code_lengths[kCodeLengthCodeOrder[i]] = VP8LReadBits(br, 3); + } + ok = ReadHuffmanCodeLengths(dec, code_length_code_lengths, alphabet_size, + code_lengths); + if (ok) { + ok = HuffmanTreeBuildImplicit(tree, code_lengths, alphabet_size); + } + free(code_lengths); + } + ok = ok && !br->error_; + if (!ok) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + return 0; + } + return 1; +} + +static void DeleteHtreeGroups(HTreeGroup* htree_groups, int num_htree_groups) { + if (htree_groups != NULL) { + int i, j; + for (i = 0; i < num_htree_groups; ++i) { + HuffmanTree* const htrees = htree_groups[i].htrees_; + for (j = 0; j < HUFFMAN_CODES_PER_META_CODE; ++j) { + HuffmanTreeRelease(&htrees[j]); + } + } + free(htree_groups); + } +} + +static int ReadHuffmanCodes(VP8LDecoder* const dec, int xsize, int ysize, + int color_cache_bits, int allow_recursion) { + int i, j; + VP8LBitReader* const br = &dec->br_; + VP8LMetadata* const hdr = &dec->hdr_; + uint32_t* huffman_image = NULL; + HTreeGroup* htree_groups = NULL; + int num_htree_groups = 1; + + if (allow_recursion && VP8LReadBits(br, 1)) { + // use meta Huffman codes. + const int huffman_precision = VP8LReadBits(br, 3) + 2; + const int huffman_xsize = VP8LSubSampleSize(xsize, huffman_precision); + const int huffman_ysize = VP8LSubSampleSize(ysize, huffman_precision); + const int huffman_pixs = huffman_xsize * huffman_ysize; + if (!DecodeImageStream(huffman_xsize, huffman_ysize, 0, dec, + &huffman_image)) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + goto Error; + } + hdr->huffman_subsample_bits_ = huffman_precision; + for (i = 0; i < huffman_pixs; ++i) { + // The huffman data is stored in red and green bytes. + const int index = (huffman_image[i] >> 8) & 0xffff; + huffman_image[i] = index; + if (index >= num_htree_groups) { + num_htree_groups = index + 1; + } + } + } + + if (br->error_) goto Error; + + assert(num_htree_groups <= 0x10000); + htree_groups = + (HTreeGroup*)WebPSafeCalloc((uint64_t)num_htree_groups, + sizeof(*htree_groups)); + if (htree_groups == NULL) { + dec->status_ = VP8_STATUS_OUT_OF_MEMORY; + goto Error; + } + + for (i = 0; i < num_htree_groups; ++i) { + HuffmanTree* const htrees = htree_groups[i].htrees_; + for (j = 0; j < HUFFMAN_CODES_PER_META_CODE; ++j) { + int alphabet_size = kAlphabetSize[j]; + if (j == 0 && color_cache_bits > 0) { + alphabet_size += 1 << color_cache_bits; + } + if (!ReadHuffmanCode(alphabet_size, dec, htrees + j)) goto Error; + } + } + + // All OK. Finalize pointers and return. + hdr->huffman_image_ = huffman_image; + hdr->num_htree_groups_ = num_htree_groups; + hdr->htree_groups_ = htree_groups; + return 1; + + Error: + free(huffman_image); + DeleteHtreeGroups(htree_groups, num_htree_groups); + return 0; +} + +//------------------------------------------------------------------------------ +// Scaling. + +static int AllocateAndInitRescaler(VP8LDecoder* const dec, VP8Io* const io) { + const int num_channels = 4; + const int in_width = io->mb_w; + const int out_width = io->scaled_width; + const int in_height = io->mb_h; + const int out_height = io->scaled_height; + const uint64_t work_size = 2 * num_channels * (uint64_t)out_width; + int32_t* work; // Rescaler work area. + const uint64_t scaled_data_size = num_channels * (uint64_t)out_width; + uint32_t* scaled_data; // Temporary storage for scaled BGRA data. + const uint64_t memory_size = sizeof(*dec->rescaler) + + work_size * sizeof(*work) + + scaled_data_size * sizeof(*scaled_data); + uint8_t* memory = (uint8_t*)WebPSafeCalloc(memory_size, sizeof(*memory)); + if (memory == NULL) { + dec->status_ = VP8_STATUS_OUT_OF_MEMORY; + return 0; + } + assert(dec->rescaler_memory == NULL); + dec->rescaler_memory = memory; + + dec->rescaler = (WebPRescaler*)memory; + memory += sizeof(*dec->rescaler); + work = (int32_t*)memory; + memory += work_size * sizeof(*work); + scaled_data = (uint32_t*)memory; + + WebPRescalerInit(dec->rescaler, in_width, in_height, (uint8_t*)scaled_data, + out_width, out_height, 0, num_channels, + in_width, out_width, in_height, out_height, work); + return 1; +} + +//------------------------------------------------------------------------------ +// Export to ARGB + +// We have special "export" function since we need to convert from BGRA +static int Export(WebPRescaler* const rescaler, WEBP_CSP_MODE colorspace, + int rgba_stride, uint8_t* const rgba) { + const uint32_t* const src = (const uint32_t*)rescaler->dst; + const int dst_width = rescaler->dst_width; + int num_lines_out = 0; + while (WebPRescalerHasPendingOutput(rescaler)) { + uint8_t* const dst = rgba + num_lines_out * rgba_stride; + WebPRescalerExportRow(rescaler); + VP8LConvertFromBGRA(src, dst_width, colorspace, dst); + ++num_lines_out; + } + return num_lines_out; +} + +// Emit scaled rows. +static int EmitRescaledRows(const VP8LDecoder* const dec, + const uint32_t* const data, int in_stride, int mb_h, + uint8_t* const out, int out_stride) { + const WEBP_CSP_MODE colorspace = dec->output_->colorspace; + const uint8_t* const in = (const uint8_t*)data; + int num_lines_in = 0; + int num_lines_out = 0; + while (num_lines_in < mb_h) { + const uint8_t* const row_in = in + num_lines_in * in_stride; + uint8_t* const row_out = out + num_lines_out * out_stride; + num_lines_in += WebPRescalerImport(dec->rescaler, mb_h - num_lines_in, + row_in, in_stride); + num_lines_out += Export(dec->rescaler, colorspace, out_stride, row_out); + } + return num_lines_out; +} + +// Emit rows without any scaling. +static int EmitRows(WEBP_CSP_MODE colorspace, + const uint32_t* const data, int in_stride, + int mb_w, int mb_h, + uint8_t* const out, int out_stride) { + int lines = mb_h; + const uint8_t* row_in = (const uint8_t*)data; + uint8_t* row_out = out; + while (lines-- > 0) { + VP8LConvertFromBGRA((const uint32_t*)row_in, mb_w, colorspace, row_out); + row_in += in_stride; + row_out += out_stride; + } + return mb_h; // Num rows out == num rows in. +} + +//------------------------------------------------------------------------------ +// Export to YUVA + +static void ConvertToYUVA(const uint32_t* const src, int width, int y_pos, + const WebPDecBuffer* const output) { + const WebPYUVABuffer* const buf = &output->u.YUVA; + // first, the luma plane + { + int i; + uint8_t* const y = buf->y + y_pos * buf->y_stride; + for (i = 0; i < width; ++i) { + const uint32_t p = src[i]; + y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff); + } + } + + // then U/V planes + { + uint8_t* const u = buf->u + (y_pos >> 1) * buf->u_stride; + uint8_t* const v = buf->v + (y_pos >> 1) * buf->v_stride; + const int uv_width = width >> 1; + int i; + for (i = 0; i < uv_width; ++i) { + const uint32_t v0 = src[2 * i + 0]; + const uint32_t v1 = src[2 * i + 1]; + // VP8RGBToU/V expects four accumulated pixels. Hence we need to + // scale r/g/b value by a factor 2. We just shift v0/v1 one bit less. + const int r = ((v0 >> 15) & 0x1fe) + ((v1 >> 15) & 0x1fe); + const int g = ((v0 >> 7) & 0x1fe) + ((v1 >> 7) & 0x1fe); + const int b = ((v0 << 1) & 0x1fe) + ((v1 << 1) & 0x1fe); + if (!(y_pos & 1)) { // even lines: store values + u[i] = VP8RGBToU(r, g, b); + v[i] = VP8RGBToV(r, g, b); + } else { // odd lines: average with previous values + const int tmp_u = VP8RGBToU(r, g, b); + const int tmp_v = VP8RGBToV(r, g, b); + // Approximated average-of-four. But it's an acceptable diff. + u[i] = (u[i] + tmp_u + 1) >> 1; + v[i] = (v[i] + tmp_v + 1) >> 1; + } + } + if (width & 1) { // last pixel + const uint32_t v0 = src[2 * i + 0]; + const int r = (v0 >> 14) & 0x3fc; + const int g = (v0 >> 6) & 0x3fc; + const int b = (v0 << 2) & 0x3fc; + if (!(y_pos & 1)) { // even lines + u[i] = VP8RGBToU(r, g, b); + v[i] = VP8RGBToV(r, g, b); + } else { // odd lines (note: we could just skip this) + const int tmp_u = VP8RGBToU(r, g, b); + const int tmp_v = VP8RGBToV(r, g, b); + u[i] = (u[i] + tmp_u + 1) >> 1; + v[i] = (v[i] + tmp_v + 1) >> 1; + } + } + } + // Lastly, store alpha if needed. + if (buf->a != NULL) { + int i; + uint8_t* const a = buf->a + y_pos * buf->a_stride; + for (i = 0; i < width; ++i) a[i] = (src[i] >> 24); + } +} + +static int ExportYUVA(const VP8LDecoder* const dec, int y_pos) { + WebPRescaler* const rescaler = dec->rescaler; + const uint32_t* const src = (const uint32_t*)rescaler->dst; + const int dst_width = rescaler->dst_width; + int num_lines_out = 0; + while (WebPRescalerHasPendingOutput(rescaler)) { + WebPRescalerExportRow(rescaler); + ConvertToYUVA(src, dst_width, y_pos, dec->output_); + ++y_pos; + ++num_lines_out; + } + return num_lines_out; +} + +static int EmitRescaledRowsYUVA(const VP8LDecoder* const dec, + const uint32_t* const data, + int in_stride, int mb_h) { + const uint8_t* const in = (const uint8_t*)data; + int num_lines_in = 0; + int y_pos = dec->last_out_row_; + while (num_lines_in < mb_h) { + const uint8_t* const row_in = in + num_lines_in * in_stride; + num_lines_in += WebPRescalerImport(dec->rescaler, mb_h - num_lines_in, + row_in, in_stride); + y_pos += ExportYUVA(dec, y_pos); + } + return y_pos; +} + +static int EmitRowsYUVA(const VP8LDecoder* const dec, + const uint32_t* const data, int in_stride, + int mb_w, int num_rows) { + int y_pos = dec->last_out_row_; + const uint8_t* row_in = (const uint8_t*)data; + while (num_rows-- > 0) { + ConvertToYUVA((const uint32_t*)row_in, mb_w, y_pos, dec->output_); + row_in += in_stride; + ++y_pos; + } + return y_pos; +} + +//------------------------------------------------------------------------------ +// Cropping. + +// Sets io->mb_y, io->mb_h & io->mb_w according to start row, end row and +// crop options. Also updates the input data pointer, so that it points to the +// start of the cropped window. +// Note that 'pixel_stride' is in units of 'uint32_t' (and not 'bytes). +// Returns true if the crop window is not empty. +static int SetCropWindow(VP8Io* const io, int y_start, int y_end, + const uint32_t** const in_data, int pixel_stride) { + assert(y_start < y_end); + assert(io->crop_left < io->crop_right); + if (y_end > io->crop_bottom) { + y_end = io->crop_bottom; // make sure we don't overflow on last row. + } + if (y_start < io->crop_top) { + const int delta = io->crop_top - y_start; + y_start = io->crop_top; + *in_data += pixel_stride * delta; + } + if (y_start >= y_end) return 0; // Crop window is empty. + + *in_data += io->crop_left; + + io->mb_y = y_start - io->crop_top; + io->mb_w = io->crop_right - io->crop_left; + io->mb_h = y_end - y_start; + return 1; // Non-empty crop window. +} + +//------------------------------------------------------------------------------ + +static WEBP_INLINE int GetMetaIndex( + const uint32_t* const image, int xsize, int bits, int x, int y) { + if (bits == 0) return 0; + return image[xsize * (y >> bits) + (x >> bits)]; +} + +static WEBP_INLINE HTreeGroup* GetHtreeGroupForPos(VP8LMetadata* const hdr, + int x, int y) { + const int meta_index = GetMetaIndex(hdr->huffman_image_, hdr->huffman_xsize_, + hdr->huffman_subsample_bits_, x, y); + assert(meta_index < hdr->num_htree_groups_); + return hdr->htree_groups_ + meta_index; +} + +//------------------------------------------------------------------------------ +// Main loop, with custom row-processing function + +typedef void (*ProcessRowsFunc)(VP8LDecoder* const dec, int row); + +static void ApplyInverseTransforms(VP8LDecoder* const dec, int num_rows, + const uint32_t* const rows) { + int n = dec->next_transform_; + const int cache_pixs = dec->width_ * num_rows; + const int start_row = dec->last_row_; + const int end_row = start_row + num_rows; + const uint32_t* rows_in = rows; + uint32_t* const rows_out = dec->argb_cache_; + + // Inverse transforms. + // TODO: most transforms only need to operate on the cropped region only. + memcpy(rows_out, rows_in, cache_pixs * sizeof(*rows_out)); + while (n-- > 0) { + VP8LTransform* const transform = &dec->transforms_[n]; + VP8LInverseTransform(transform, start_row, end_row, rows_in, rows_out); + rows_in = rows_out; + } +} + +// Processes (transforms, scales & color-converts) the rows decoded after the +// last call. +static void ProcessRows(VP8LDecoder* const dec, int row) { + const uint32_t* const rows = dec->argb_ + dec->width_ * dec->last_row_; + const int num_rows = row - dec->last_row_; + + if (num_rows <= 0) return; // Nothing to be done. + ApplyInverseTransforms(dec, num_rows, rows); + + // Emit output. + { + VP8Io* const io = dec->io_; + const uint32_t* rows_data = dec->argb_cache_; + if (!SetCropWindow(io, dec->last_row_, row, &rows_data, io->width)) { + // Nothing to output (this time). + } else { + const WebPDecBuffer* const output = dec->output_; + const int in_stride = io->width * sizeof(*rows_data); + if (output->colorspace < MODE_YUV) { // convert to RGBA + const WebPRGBABuffer* const buf = &output->u.RGBA; + uint8_t* const rgba = buf->rgba + dec->last_out_row_ * buf->stride; + const int num_rows_out = io->use_scaling ? + EmitRescaledRows(dec, rows_data, in_stride, io->mb_h, + rgba, buf->stride) : + EmitRows(output->colorspace, rows_data, in_stride, + io->mb_w, io->mb_h, rgba, buf->stride); + // Update 'last_out_row_'. + dec->last_out_row_ += num_rows_out; + } else { // convert to YUVA + dec->last_out_row_ = io->use_scaling ? + EmitRescaledRowsYUVA(dec, rows_data, in_stride, io->mb_h) : + EmitRowsYUVA(dec, rows_data, in_stride, io->mb_w, io->mb_h); + } + assert(dec->last_out_row_ <= output->height); + } + } + + // Update 'last_row_'. + dec->last_row_ = row; + assert(dec->last_row_ <= dec->height_); +} + +static int DecodeImageData(VP8LDecoder* const dec, + uint32_t* const data, int width, int height, + ProcessRowsFunc process_func) { + int ok = 1; + int col = 0, row = 0; + VP8LBitReader* const br = &dec->br_; + VP8LMetadata* const hdr = &dec->hdr_; + HTreeGroup* htree_group = hdr->htree_groups_; + uint32_t* src = data; + uint32_t* last_cached = data; + uint32_t* const src_end = data + width * height; + const int len_code_limit = NUM_LITERAL_CODES + NUM_LENGTH_CODES; + const int color_cache_limit = len_code_limit + hdr->color_cache_size_; + VP8LColorCache* const color_cache = + (hdr->color_cache_size_ > 0) ? &hdr->color_cache_ : NULL; + const int mask = hdr->huffman_mask_; + + assert(htree_group != NULL); + + while (!br->eos_ && src < src_end) { + int code; + // Only update when changing tile. Note we could use the following test: + // if "((((prev_col ^ col) | prev_row ^ row)) > mask)" -> tile changed + // but that's actually slower and requires storing the previous col/row + if ((col & mask) == 0) { + htree_group = GetHtreeGroupForPos(hdr, col, row); + } + VP8LFillBitWindow(br); + code = ReadSymbol(&htree_group->htrees_[GREEN], br); + if (code < NUM_LITERAL_CODES) { // Literal. + int red, green, blue, alpha; + red = ReadSymbol(&htree_group->htrees_[RED], br); + green = code; + VP8LFillBitWindow(br); + blue = ReadSymbol(&htree_group->htrees_[BLUE], br); + alpha = ReadSymbol(&htree_group->htrees_[ALPHA], br); + *src = (alpha << 24) + (red << 16) + (green << 8) + blue; + AdvanceByOne: + ++src; + ++col; + if (col >= width) { + col = 0; + ++row; + if ((process_func != NULL) && (row % NUM_ARGB_CACHE_ROWS == 0)) { + process_func(dec, row); + } + if (color_cache != NULL) { + while (last_cached < src) { + VP8LColorCacheInsert(color_cache, *last_cached++); + } + } + } + } else if (code < len_code_limit) { // Backward reference + int dist_code, dist; + const int length_sym = code - NUM_LITERAL_CODES; + const int length = GetCopyLength(length_sym, br); + const int dist_symbol = ReadSymbol(&htree_group->htrees_[DIST], br); + VP8LFillBitWindow(br); + dist_code = GetCopyDistance(dist_symbol, br); + dist = PlaneCodeToDistance(width, dist_code); + if (src - data < dist || src_end - src < length) { + ok = 0; + goto End; + } + { + int i; + for (i = 0; i < length; ++i) src[i] = src[i - dist]; + src += length; + } + col += length; + while (col >= width) { + col -= width; + ++row; + if ((process_func != NULL) && (row % NUM_ARGB_CACHE_ROWS == 0)) { + process_func(dec, row); + } + } + if (src < src_end) { + htree_group = GetHtreeGroupForPos(hdr, col, row); + if (color_cache != NULL) { + while (last_cached < src) { + VP8LColorCacheInsert(color_cache, *last_cached++); + } + } + } + } else if (code < color_cache_limit) { // Color cache. + const int key = code - len_code_limit; + assert(color_cache != NULL); + while (last_cached < src) { + VP8LColorCacheInsert(color_cache, *last_cached++); + } + *src = VP8LColorCacheLookup(color_cache, key); + goto AdvanceByOne; + } else { // Not reached. + ok = 0; + goto End; + } + ok = !br->error_; + if (!ok) goto End; + } + // Process the remaining rows corresponding to last row-block. + if (process_func != NULL) process_func(dec, row); + + End: + if (br->error_ || !ok || (br->eos_ && src < src_end)) { + ok = 0; + dec->status_ = (!br->eos_) ? + VP8_STATUS_BITSTREAM_ERROR : VP8_STATUS_SUSPENDED; + } else if (src == src_end) { + dec->state_ = READ_DATA; + } + + return ok; +} + +// ----------------------------------------------------------------------------- +// VP8LTransform + +static void ClearTransform(VP8LTransform* const transform) { + free(transform->data_); + transform->data_ = NULL; +} + +// For security reason, we need to remap the color map to span +// the total possible bundled values, and not just the num_colors. +static int ExpandColorMap(int num_colors, VP8LTransform* const transform) { + int i; + const int final_num_colors = 1 << (8 >> transform->bits_); + uint32_t* const new_color_map = + (uint32_t*)WebPSafeMalloc((uint64_t)final_num_colors, + sizeof(*new_color_map)); + if (new_color_map == NULL) { + return 0; + } else { + uint8_t* const data = (uint8_t*)transform->data_; + uint8_t* const new_data = (uint8_t*)new_color_map; + new_color_map[0] = transform->data_[0]; + for (i = 4; i < 4 * num_colors; ++i) { + // Equivalent to AddPixelEq(), on a byte-basis. + new_data[i] = (data[i] + new_data[i - 4]) & 0xff; + } + for (; i < 4 * final_num_colors; ++i) + new_data[i] = 0; // black tail. + free(transform->data_); + transform->data_ = new_color_map; + } + return 1; +} + +static int ReadTransform(int* const xsize, int const* ysize, + VP8LDecoder* const dec) { + int ok = 1; + VP8LBitReader* const br = &dec->br_; + VP8LTransform* transform = &dec->transforms_[dec->next_transform_]; + const VP8LImageTransformType type = + (VP8LImageTransformType)VP8LReadBits(br, 2); + + // Each transform type can only be present once in the stream. + if (dec->transforms_seen_ & (1U << type)) { + return 0; // Already there, let's not accept the second same transform. + } + dec->transforms_seen_ |= (1U << type); + + transform->type_ = type; + transform->xsize_ = *xsize; + transform->ysize_ = *ysize; + transform->data_ = NULL; + ++dec->next_transform_; + assert(dec->next_transform_ <= NUM_TRANSFORMS); + + switch (type) { + case PREDICTOR_TRANSFORM: + case CROSS_COLOR_TRANSFORM: + transform->bits_ = VP8LReadBits(br, 3) + 2; + ok = DecodeImageStream(VP8LSubSampleSize(transform->xsize_, + transform->bits_), + VP8LSubSampleSize(transform->ysize_, + transform->bits_), + 0, dec, &transform->data_); + break; + case COLOR_INDEXING_TRANSFORM: { + const int num_colors = VP8LReadBits(br, 8) + 1; + const int bits = (num_colors > 16) ? 0 + : (num_colors > 4) ? 1 + : (num_colors > 2) ? 2 + : 3; + *xsize = VP8LSubSampleSize(transform->xsize_, bits); + transform->bits_ = bits; + ok = DecodeImageStream(num_colors, 1, 0, dec, &transform->data_); + ok = ok && ExpandColorMap(num_colors, transform); + break; + } + case SUBTRACT_GREEN: + break; + default: + assert(0); // can't happen + break; + } + + return ok; +} + +// ----------------------------------------------------------------------------- +// VP8LMetadata + +static void InitMetadata(VP8LMetadata* const hdr) { + assert(hdr); + memset(hdr, 0, sizeof(*hdr)); +} + +static void ClearMetadata(VP8LMetadata* const hdr) { + assert(hdr); + + free(hdr->huffman_image_); + DeleteHtreeGroups(hdr->htree_groups_, hdr->num_htree_groups_); + VP8LColorCacheClear(&hdr->color_cache_); + InitMetadata(hdr); +} + +// ----------------------------------------------------------------------------- +// VP8LDecoder + +VP8LDecoder* VP8LNew(void) { + VP8LDecoder* const dec = (VP8LDecoder*)calloc(1, sizeof(*dec)); + if (dec == NULL) return NULL; + dec->status_ = VP8_STATUS_OK; + dec->action_ = READ_DIM; + dec->state_ = READ_DIM; + return dec; +} + +void VP8LClear(VP8LDecoder* const dec) { + int i; + if (dec == NULL) return; + ClearMetadata(&dec->hdr_); + + free(dec->argb_); + dec->argb_ = NULL; + for (i = 0; i < dec->next_transform_; ++i) { + ClearTransform(&dec->transforms_[i]); + } + dec->next_transform_ = 0; + dec->transforms_seen_ = 0; + + free(dec->rescaler_memory); + dec->rescaler_memory = NULL; + + dec->output_ = NULL; // leave no trace behind +} + +void VP8LDelete(VP8LDecoder* const dec) { + if (dec != NULL) { + VP8LClear(dec); + free(dec); + } +} + +static void UpdateDecoder(VP8LDecoder* const dec, int width, int height) { + VP8LMetadata* const hdr = &dec->hdr_; + const int num_bits = hdr->huffman_subsample_bits_; + dec->width_ = width; + dec->height_ = height; + + hdr->huffman_xsize_ = VP8LSubSampleSize(width, num_bits); + hdr->huffman_mask_ = (num_bits == 0) ? ~0 : (1 << num_bits) - 1; +} + +static int DecodeImageStream(int xsize, int ysize, + int is_level0, + VP8LDecoder* const dec, + uint32_t** const decoded_data) { + int ok = 1; + int transform_xsize = xsize; + int transform_ysize = ysize; + VP8LBitReader* const br = &dec->br_; + VP8LMetadata* const hdr = &dec->hdr_; + uint32_t* data = NULL; + int color_cache_bits = 0; + + // Read the transforms (may recurse). + if (is_level0) { + while (ok && VP8LReadBits(br, 1)) { + ok = ReadTransform(&transform_xsize, &transform_ysize, dec); + } + } + + // Color cache + if (ok && VP8LReadBits(br, 1)) { + color_cache_bits = VP8LReadBits(br, 4); + ok = (color_cache_bits >= 1 && color_cache_bits <= MAX_CACHE_BITS); + if (!ok) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + goto End; + } + } + + // Read the Huffman codes (may recurse). + ok = ok && ReadHuffmanCodes(dec, transform_xsize, transform_ysize, + color_cache_bits, is_level0); + if (!ok) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + goto End; + } + + // Finish setting up the color-cache + if (color_cache_bits > 0) { + hdr->color_cache_size_ = 1 << color_cache_bits; + if (!VP8LColorCacheInit(&hdr->color_cache_, color_cache_bits)) { + dec->status_ = VP8_STATUS_OUT_OF_MEMORY; + ok = 0; + goto End; + } + } else { + hdr->color_cache_size_ = 0; + } + UpdateDecoder(dec, transform_xsize, transform_ysize); + + if (is_level0) { // level 0 complete + dec->state_ = READ_HDR; + goto End; + } + + { + const uint64_t total_size = (uint64_t)transform_xsize * transform_ysize; + data = (uint32_t*)WebPSafeMalloc(total_size, sizeof(*data)); + if (data == NULL) { + dec->status_ = VP8_STATUS_OUT_OF_MEMORY; + ok = 0; + goto End; + } + } + + // Use the Huffman trees to decode the LZ77 encoded data. + ok = DecodeImageData(dec, data, transform_xsize, transform_ysize, NULL); + ok = ok && !br->error_; + + End: + + if (!ok) { + free(data); + ClearMetadata(hdr); + // If not enough data (br.eos_) resulted in BIT_STREAM_ERROR, update the + // status appropriately. + if (dec->status_ == VP8_STATUS_BITSTREAM_ERROR && dec->br_.eos_) { + dec->status_ = VP8_STATUS_SUSPENDED; + } + } else { + if (decoded_data != NULL) { + *decoded_data = data; + } else { + // We allocate image data in this function only for transforms. At level 0 + // (that is: not the transforms), we shouldn't have allocated anything. + assert(data == NULL); + assert(is_level0); + } + if (!is_level0) ClearMetadata(hdr); // Clean up temporary data behind. + } + return ok; +} + +//------------------------------------------------------------------------------ +// Allocate dec->argb_ and dec->argb_cache_ using dec->width_ and dec->height_ + +static int AllocateARGBBuffers(VP8LDecoder* const dec, int final_width) { + const uint64_t num_pixels = (uint64_t)dec->width_ * dec->height_; + // Scratch buffer corresponding to top-prediction row for transforming the + // first row in the row-blocks. + const uint64_t cache_top_pixels = final_width; + // Scratch buffer for temporary BGRA storage. + const uint64_t cache_pixels = (uint64_t)final_width * NUM_ARGB_CACHE_ROWS; + const uint64_t total_num_pixels = + num_pixels + cache_top_pixels + cache_pixels; + + assert(dec->width_ <= final_width); + dec->argb_ = (uint32_t*)WebPSafeMalloc(total_num_pixels, sizeof(*dec->argb_)); + if (dec->argb_ == NULL) { + dec->argb_cache_ = NULL; // for sanity check + dec->status_ = VP8_STATUS_OUT_OF_MEMORY; + return 0; + } + dec->argb_cache_ = dec->argb_ + num_pixels + cache_top_pixels; + return 1; +} + +//------------------------------------------------------------------------------ +// Special row-processing that only stores the alpha data. + +static void ExtractAlphaRows(VP8LDecoder* const dec, int row) { + const int num_rows = row - dec->last_row_; + const uint32_t* const in = dec->argb_ + dec->width_ * dec->last_row_; + + if (num_rows <= 0) return; // Nothing to be done. + ApplyInverseTransforms(dec, num_rows, in); + + // Extract alpha (which is stored in the green plane). + { + const int width = dec->io_->width; // the final width (!= dec->width_) + const int cache_pixs = width * num_rows; + uint8_t* const dst = (uint8_t*)dec->io_->opaque + width * dec->last_row_; + const uint32_t* const src = dec->argb_cache_; + int i; + for (i = 0; i < cache_pixs; ++i) dst[i] = (src[i] >> 8) & 0xff; + } + + dec->last_row_ = dec->last_out_row_ = row; +} + +int VP8LDecodeAlphaImageStream(int width, int height, const uint8_t* const data, + size_t data_size, uint8_t* const output) { + VP8Io io; + int ok = 0; + VP8LDecoder* const dec = VP8LNew(); + if (dec == NULL) return 0; + + dec->width_ = width; + dec->height_ = height; + dec->io_ = &io; + + VP8InitIo(&io); + WebPInitCustomIo(NULL, &io); // Just a sanity Init. io won't be used. + io.opaque = output; + io.width = width; + io.height = height; + + dec->status_ = VP8_STATUS_OK; + VP8LInitBitReader(&dec->br_, data, data_size); + + dec->action_ = READ_HDR; + if (!DecodeImageStream(width, height, 1, dec, NULL)) goto Err; + + // Allocate output (note that dec->width_ may have changed here). + if (!AllocateARGBBuffers(dec, width)) goto Err; + + // Decode (with special row processing). + dec->action_ = READ_DATA; + ok = DecodeImageData(dec, dec->argb_, dec->width_, dec->height_, + ExtractAlphaRows); + + Err: + VP8LDelete(dec); + return ok; +} + +//------------------------------------------------------------------------------ + +int VP8LDecodeHeader(VP8LDecoder* const dec, VP8Io* const io) { + int width, height, has_alpha; + + if (dec == NULL) return 0; + if (io == NULL) { + dec->status_ = VP8_STATUS_INVALID_PARAM; + return 0; + } + + dec->io_ = io; + dec->status_ = VP8_STATUS_OK; + VP8LInitBitReader(&dec->br_, io->data, io->data_size); + if (!ReadImageInfo(&dec->br_, &width, &height, &has_alpha)) { + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + goto Error; + } + dec->state_ = READ_DIM; + io->width = width; + io->height = height; + + dec->action_ = READ_HDR; + if (!DecodeImageStream(width, height, 1, dec, NULL)) goto Error; + return 1; + + Error: + VP8LClear(dec); + assert(dec->status_ != VP8_STATUS_OK); + return 0; +} + +int VP8LDecodeImage(VP8LDecoder* const dec) { + VP8Io* io = NULL; + WebPDecParams* params = NULL; + + // Sanity checks. + if (dec == NULL) return 0; + + io = dec->io_; + assert(io != NULL); + params = (WebPDecParams*)io->opaque; + assert(params != NULL); + dec->output_ = params->output; + assert(dec->output_ != NULL); + + // Initialization. + if (!WebPIoInitFromOptions(params->options, io, MODE_BGRA)) { + dec->status_ = VP8_STATUS_INVALID_PARAM; + goto Err; + } + + if (!AllocateARGBBuffers(dec, io->width)) goto Err; + + if (io->use_scaling && !AllocateAndInitRescaler(dec, io)) goto Err; + + // Decode. + dec->action_ = READ_DATA; + if (!DecodeImageData(dec, dec->argb_, dec->width_, dec->height_, + ProcessRows)) { + goto Err; + } + + // Cleanup. + params->last_y = dec->last_out_row_; + VP8LClear(dec); + return 1; + + Err: + VP8LClear(dec); + assert(dec->status_ != VP8_STATUS_OK); + return 0; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/vp8li.h b/drivers/webpold/dec/vp8li.h new file mode 100644 index 0000000000..5f6cd6a01c --- /dev/null +++ b/drivers/webpold/dec/vp8li.h @@ -0,0 +1,121 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Lossless decoder: internal header. +// +// Author: Skal (pascal.massimino@gmail.com) +// Vikas Arora(vikaas.arora@gmail.com) + +#ifndef WEBP_DEC_VP8LI_H_ +#define WEBP_DEC_VP8LI_H_ + +#include <string.h> // for memcpy() +#include "./webpi.h" +#include "../utils/bit_reader.h" +#include "../utils/color_cache.h" +#include "../utils/huffman.h" +#include "../format_constants.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +typedef enum { + READ_DATA = 0, + READ_HDR = 1, + READ_DIM = 2 +} VP8LDecodeState; + +typedef struct VP8LTransform VP8LTransform; +struct VP8LTransform { + VP8LImageTransformType type_; // transform type. + int bits_; // subsampling bits defining transform window. + int xsize_; // transform window X index. + int ysize_; // transform window Y index. + uint32_t *data_; // transform data. +}; + +typedef struct { + HuffmanTree htrees_[HUFFMAN_CODES_PER_META_CODE]; +} HTreeGroup; + +typedef struct { + int color_cache_size_; + VP8LColorCache color_cache_; + + int huffman_mask_; + int huffman_subsample_bits_; + int huffman_xsize_; + uint32_t *huffman_image_; + int num_htree_groups_; + HTreeGroup *htree_groups_; +} VP8LMetadata; + +typedef struct { + VP8StatusCode status_; + VP8LDecodeState action_; + VP8LDecodeState state_; + VP8Io *io_; + + const WebPDecBuffer *output_; // shortcut to io->opaque->output + + uint32_t *argb_; // Internal data: always in BGRA color mode. + uint32_t *argb_cache_; // Scratch buffer for temporary BGRA storage. + + VP8LBitReader br_; + + int width_; + int height_; + int last_row_; // last input row decoded so far. + int last_out_row_; // last row output so far. + + VP8LMetadata hdr_; + + int next_transform_; + VP8LTransform transforms_[NUM_TRANSFORMS]; + // or'd bitset storing the transforms types. + uint32_t transforms_seen_; + + uint8_t *rescaler_memory; // Working memory for rescaling work. + WebPRescaler *rescaler; // Common rescaler for all channels. +} VP8LDecoder; + +//------------------------------------------------------------------------------ +// internal functions. Not public. + +// in vp8l.c + +// Decodes a raw image stream (without header) and store the alpha data +// into *output, which must be of size width x height. Returns false in case +// of error. +int VP8LDecodeAlphaImageStream(int width, int height, const uint8_t* const data, + size_t data_size, uint8_t* const output); + +// Allocates and initialize a new lossless decoder instance. +VP8LDecoder* VP8LNew(void); + +// Decodes the image header. Returns false in case of error. +int VP8LDecodeHeader(VP8LDecoder* const dec, VP8Io* const io); + +// Decodes an image. It's required to decode the lossless header before calling +// this function. Returns false in case of error, with updated dec->status_. +int VP8LDecodeImage(VP8LDecoder* const dec); + +// Resets the decoder in its initial state, reclaiming memory. +// Preserves the dec->status_ value. +void VP8LClear(VP8LDecoder* const dec); + +// Clears and deallocate a lossless decoder instance. +void VP8LDelete(VP8LDecoder* const dec); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_DEC_VP8LI_H_ */ diff --git a/drivers/webpold/dec/webp.c b/drivers/webpold/dec/webp.c new file mode 100644 index 0000000000..f44bc2b8ae --- /dev/null +++ b/drivers/webpold/dec/webp.c @@ -0,0 +1,771 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Main decoding functions for WEBP images. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> + +#include "./vp8i.h" +#include "./vp8li.h" +#include "./webpi.h" +#include "../format_constants.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// RIFF layout is: +// Offset tag +// 0...3 "RIFF" 4-byte tag +// 4...7 size of image data (including metadata) starting at offset 8 +// 8...11 "WEBP" our form-type signature +// The RIFF container (12 bytes) is followed by appropriate chunks: +// 12..15 "VP8 ": 4-bytes tags, signaling the use of VP8 video format +// 16..19 size of the raw VP8 image data, starting at offset 20 +// 20.... the VP8 bytes +// Or, +// 12..15 "VP8L": 4-bytes tags, signaling the use of VP8L lossless format +// 16..19 size of the raw VP8L image data, starting at offset 20 +// 20.... the VP8L bytes +// Or, +// 12..15 "VP8X": 4-bytes tags, describing the extended-VP8 chunk. +// 16..19 size of the VP8X chunk starting at offset 20. +// 20..23 VP8X flags bit-map corresponding to the chunk-types present. +// 24..26 Width of the Canvas Image. +// 27..29 Height of the Canvas Image. +// There can be extra chunks after the "VP8X" chunk (ICCP, TILE, FRM, VP8, +// META ...) +// All sizes are in little-endian order. +// Note: chunk data size must be padded to multiple of 2 when written. + +static WEBP_INLINE uint32_t get_le24(const uint8_t* const data) { + return data[0] | (data[1] << 8) | (data[2] << 16); +} + +static WEBP_INLINE uint32_t get_le32(const uint8_t* const data) { + return (uint32_t)get_le24(data) | (data[3] << 24); +} + +// Validates the RIFF container (if detected) and skips over it. +// If a RIFF container is detected, +// Returns VP8_STATUS_BITSTREAM_ERROR for invalid header, and +// VP8_STATUS_OK otherwise. +// In case there are not enough bytes (partial RIFF container), return 0 for +// *riff_size. Else return the RIFF size extracted from the header. +static VP8StatusCode ParseRIFF(const uint8_t** const data, + size_t* const data_size, + size_t* const riff_size) { + assert(data != NULL); + assert(data_size != NULL); + assert(riff_size != NULL); + + *riff_size = 0; // Default: no RIFF present. + if (*data_size >= RIFF_HEADER_SIZE && !memcmp(*data, "RIFF", TAG_SIZE)) { + if (memcmp(*data + 8, "WEBP", TAG_SIZE)) { + return VP8_STATUS_BITSTREAM_ERROR; // Wrong image file signature. + } else { + const uint32_t size = get_le32(*data + TAG_SIZE); + // Check that we have at least one chunk (i.e "WEBP" + "VP8?nnnn"). + if (size < TAG_SIZE + CHUNK_HEADER_SIZE) { + return VP8_STATUS_BITSTREAM_ERROR; + } + // We have a RIFF container. Skip it. + *riff_size = size; + *data += RIFF_HEADER_SIZE; + *data_size -= RIFF_HEADER_SIZE; + } + } + return VP8_STATUS_OK; +} + +// Validates the VP8X header and skips over it. +// Returns VP8_STATUS_BITSTREAM_ERROR for invalid VP8X header, +// VP8_STATUS_NOT_ENOUGH_DATA in case of insufficient data, and +// VP8_STATUS_OK otherwise. +// If a VP8X chunk is found, found_vp8x is set to true and *width_ptr, +// *height_ptr and *flags_ptr are set to the corresponding values extracted +// from the VP8X chunk. +static VP8StatusCode ParseVP8X(const uint8_t** const data, + size_t* const data_size, + int* const found_vp8x, + int* const width_ptr, int* const height_ptr, + uint32_t* const flags_ptr) { + const uint32_t vp8x_size = CHUNK_HEADER_SIZE + VP8X_CHUNK_SIZE; + assert(data != NULL); + assert(data_size != NULL); + assert(found_vp8x != NULL); + + *found_vp8x = 0; + + if (*data_size < CHUNK_HEADER_SIZE) { + return VP8_STATUS_NOT_ENOUGH_DATA; // Insufficient data. + } + + if (!memcmp(*data, "VP8X", TAG_SIZE)) { + int width, height; + uint32_t flags; + const uint32_t chunk_size = get_le32(*data + TAG_SIZE); + if (chunk_size != VP8X_CHUNK_SIZE) { + return VP8_STATUS_BITSTREAM_ERROR; // Wrong chunk size. + } + + // Verify if enough data is available to validate the VP8X chunk. + if (*data_size < vp8x_size) { + return VP8_STATUS_NOT_ENOUGH_DATA; // Insufficient data. + } + flags = get_le32(*data + 8); + width = 1 + get_le24(*data + 12); + height = 1 + get_le24(*data + 15); + if (width * (uint64_t)height >= MAX_IMAGE_AREA) { + return VP8_STATUS_BITSTREAM_ERROR; // image is too large + } + + if (flags_ptr != NULL) *flags_ptr = flags; + if (width_ptr != NULL) *width_ptr = width; + if (height_ptr != NULL) *height_ptr = height; + // Skip over VP8X header bytes. + *data += vp8x_size; + *data_size -= vp8x_size; + *found_vp8x = 1; + } + return VP8_STATUS_OK; +} + +// Skips to the next VP8/VP8L chunk header in the data given the size of the +// RIFF chunk 'riff_size'. +// Returns VP8_STATUS_BITSTREAM_ERROR if any invalid chunk size is encountered, +// VP8_STATUS_NOT_ENOUGH_DATA in case of insufficient data, and +// VP8_STATUS_OK otherwise. +// If an alpha chunk is found, *alpha_data and *alpha_size are set +// appropriately. +static VP8StatusCode ParseOptionalChunks(const uint8_t** const data, + size_t* const data_size, + size_t const riff_size, + const uint8_t** const alpha_data, + size_t* const alpha_size) { + const uint8_t* buf; + size_t buf_size; + uint32_t total_size = TAG_SIZE + // "WEBP". + CHUNK_HEADER_SIZE + // "VP8Xnnnn". + VP8X_CHUNK_SIZE; // data. + assert(data != NULL); + assert(data_size != NULL); + buf = *data; + buf_size = *data_size; + + assert(alpha_data != NULL); + assert(alpha_size != NULL); + *alpha_data = NULL; + *alpha_size = 0; + + while (1) { + uint32_t chunk_size; + uint32_t disk_chunk_size; // chunk_size with padding + + *data = buf; + *data_size = buf_size; + + if (buf_size < CHUNK_HEADER_SIZE) { // Insufficient data. + return VP8_STATUS_NOT_ENOUGH_DATA; + } + + chunk_size = get_le32(buf + TAG_SIZE); + // For odd-sized chunk-payload, there's one byte padding at the end. + disk_chunk_size = (CHUNK_HEADER_SIZE + chunk_size + 1) & ~1; + total_size += disk_chunk_size; + + // Check that total bytes skipped so far does not exceed riff_size. + if (riff_size > 0 && (total_size > riff_size)) { + return VP8_STATUS_BITSTREAM_ERROR; // Not a valid chunk size. + } + + if (buf_size < disk_chunk_size) { // Insufficient data. + return VP8_STATUS_NOT_ENOUGH_DATA; + } + + if (!memcmp(buf, "ALPH", TAG_SIZE)) { // A valid ALPH header. + *alpha_data = buf + CHUNK_HEADER_SIZE; + *alpha_size = chunk_size; + } else if (!memcmp(buf, "VP8 ", TAG_SIZE) || + !memcmp(buf, "VP8L", TAG_SIZE)) { // A valid VP8/VP8L header. + return VP8_STATUS_OK; // Found. + } + + // We have a full and valid chunk; skip it. + buf += disk_chunk_size; + buf_size -= disk_chunk_size; + } +} + +// Validates the VP8/VP8L Header ("VP8 nnnn" or "VP8L nnnn") and skips over it. +// Returns VP8_STATUS_BITSTREAM_ERROR for invalid (chunk larger than +// riff_size) VP8/VP8L header, +// VP8_STATUS_NOT_ENOUGH_DATA in case of insufficient data, and +// VP8_STATUS_OK otherwise. +// If a VP8/VP8L chunk is found, *chunk_size is set to the total number of bytes +// extracted from the VP8/VP8L chunk header. +// The flag '*is_lossless' is set to 1 in case of VP8L chunk / raw VP8L data. +static VP8StatusCode ParseVP8Header(const uint8_t** const data_ptr, + size_t* const data_size, + size_t riff_size, + size_t* const chunk_size, + int* const is_lossless) { + const uint8_t* const data = *data_ptr; + const int is_vp8 = !memcmp(data, "VP8 ", TAG_SIZE); + const int is_vp8l = !memcmp(data, "VP8L", TAG_SIZE); + const uint32_t minimal_size = + TAG_SIZE + CHUNK_HEADER_SIZE; // "WEBP" + "VP8 nnnn" OR + // "WEBP" + "VP8Lnnnn" + assert(data != NULL); + assert(data_size != NULL); + assert(chunk_size != NULL); + assert(is_lossless != NULL); + + if (*data_size < CHUNK_HEADER_SIZE) { + return VP8_STATUS_NOT_ENOUGH_DATA; // Insufficient data. + } + + if (is_vp8 || is_vp8l) { + // Bitstream contains VP8/VP8L header. + const uint32_t size = get_le32(data + TAG_SIZE); + if ((riff_size >= minimal_size) && (size > riff_size - minimal_size)) { + return VP8_STATUS_BITSTREAM_ERROR; // Inconsistent size information. + } + // Skip over CHUNK_HEADER_SIZE bytes from VP8/VP8L Header. + *chunk_size = size; + *data_ptr += CHUNK_HEADER_SIZE; + *data_size -= CHUNK_HEADER_SIZE; + *is_lossless = is_vp8l; + } else { + // Raw VP8/VP8L bitstream (no header). + *is_lossless = VP8LCheckSignature(data, *data_size); + *chunk_size = *data_size; + } + + return VP8_STATUS_OK; +} + +//------------------------------------------------------------------------------ + +// Fetch '*width', '*height', '*has_alpha' and fill out 'headers' based on +// 'data'. All the output parameters may be NULL. If 'headers' is NULL only the +// minimal amount will be read to fetch the remaining parameters. +// If 'headers' is non-NULL this function will attempt to locate both alpha +// data (with or without a VP8X chunk) and the bitstream chunk (VP8/VP8L). +// Note: The following chunk sequences (before the raw VP8/VP8L data) are +// considered valid by this function: +// RIFF + VP8(L) +// RIFF + VP8X + (optional chunks) + VP8(L) +// ALPH + VP8 <-- Not a valid WebP format: only allowed for internal purpose. +// VP8(L) <-- Not a valid WebP format: only allowed for internal purpose. +static VP8StatusCode ParseHeadersInternal(const uint8_t* data, + size_t data_size, + int* const width, + int* const height, + int* const has_alpha, + WebPHeaderStructure* const headers) { + int found_riff = 0; + int found_vp8x = 0; + VP8StatusCode status; + WebPHeaderStructure hdrs; + + if (data == NULL || data_size < RIFF_HEADER_SIZE) { + return VP8_STATUS_NOT_ENOUGH_DATA; + } + memset(&hdrs, 0, sizeof(hdrs)); + hdrs.data = data; + hdrs.data_size = data_size; + + // Skip over RIFF header. + status = ParseRIFF(&data, &data_size, &hdrs.riff_size); + if (status != VP8_STATUS_OK) { + return status; // Wrong RIFF header / insufficient data. + } + found_riff = (hdrs.riff_size > 0); + + // Skip over VP8X. + { + uint32_t flags = 0; + status = ParseVP8X(&data, &data_size, &found_vp8x, width, height, &flags); + if (status != VP8_STATUS_OK) { + return status; // Wrong VP8X / insufficient data. + } + if (!found_riff && found_vp8x) { + // Note: This restriction may be removed in the future, if it becomes + // necessary to send VP8X chunk to the decoder. + return VP8_STATUS_BITSTREAM_ERROR; + } + if (has_alpha != NULL) *has_alpha = !!(flags & ALPHA_FLAG_BIT); + if (found_vp8x && headers == NULL) { + return VP8_STATUS_OK; // Return features from VP8X header. + } + } + + if (data_size < TAG_SIZE) return VP8_STATUS_NOT_ENOUGH_DATA; + + // Skip over optional chunks if data started with "RIFF + VP8X" or "ALPH". + if ((found_riff && found_vp8x) || + (!found_riff && !found_vp8x && !memcmp(data, "ALPH", TAG_SIZE))) { + status = ParseOptionalChunks(&data, &data_size, hdrs.riff_size, + &hdrs.alpha_data, &hdrs.alpha_data_size); + if (status != VP8_STATUS_OK) { + return status; // Found an invalid chunk size / insufficient data. + } + } + + // Skip over VP8/VP8L header. + status = ParseVP8Header(&data, &data_size, hdrs.riff_size, + &hdrs.compressed_size, &hdrs.is_lossless); + if (status != VP8_STATUS_OK) { + return status; // Wrong VP8/VP8L chunk-header / insufficient data. + } + if (hdrs.compressed_size > MAX_CHUNK_PAYLOAD) { + return VP8_STATUS_BITSTREAM_ERROR; + } + + if (!hdrs.is_lossless) { + if (data_size < VP8_FRAME_HEADER_SIZE) { + return VP8_STATUS_NOT_ENOUGH_DATA; + } + // Validates raw VP8 data. + if (!VP8GetInfo(data, data_size, + (uint32_t)hdrs.compressed_size, width, height)) { + return VP8_STATUS_BITSTREAM_ERROR; + } + } else { + if (data_size < VP8L_FRAME_HEADER_SIZE) { + return VP8_STATUS_NOT_ENOUGH_DATA; + } + // Validates raw VP8L data. + if (!VP8LGetInfo(data, data_size, width, height, has_alpha)) { + return VP8_STATUS_BITSTREAM_ERROR; + } + } + + if (has_alpha != NULL) { + // If the data did not contain a VP8X/VP8L chunk the only definitive way + // to set this is by looking for alpha data (from an ALPH chunk). + *has_alpha |= (hdrs.alpha_data != NULL); + } + if (headers != NULL) { + *headers = hdrs; + headers->offset = data - headers->data; + assert((uint64_t)(data - headers->data) < MAX_CHUNK_PAYLOAD); + assert(headers->offset == headers->data_size - data_size); + } + return VP8_STATUS_OK; // Return features from VP8 header. +} + +VP8StatusCode WebPParseHeaders(WebPHeaderStructure* const headers) { + assert(headers != NULL); + // fill out headers, ignore width/height/has_alpha. + return ParseHeadersInternal(headers->data, headers->data_size, + NULL, NULL, NULL, headers); +} + +//------------------------------------------------------------------------------ +// WebPDecParams + +void WebPResetDecParams(WebPDecParams* const params) { + if (params) { + memset(params, 0, sizeof(*params)); + } +} + +//------------------------------------------------------------------------------ +// "Into" decoding variants + +// Main flow +static VP8StatusCode DecodeInto(const uint8_t* const data, size_t data_size, + WebPDecParams* const params) { + VP8StatusCode status; + VP8Io io; + WebPHeaderStructure headers; + + headers.data = data; + headers.data_size = data_size; + status = WebPParseHeaders(&headers); // Process Pre-VP8 chunks. + if (status != VP8_STATUS_OK) { + return status; + } + + assert(params != NULL); + VP8InitIo(&io); + io.data = headers.data + headers.offset; + io.data_size = headers.data_size - headers.offset; + WebPInitCustomIo(params, &io); // Plug the I/O functions. + + if (!headers.is_lossless) { + VP8Decoder* const dec = VP8New(); + if (dec == NULL) { + return VP8_STATUS_OUT_OF_MEMORY; + } +#ifdef WEBP_USE_THREAD + dec->use_threads_ = params->options && (params->options->use_threads > 0); +#else + dec->use_threads_ = 0; +#endif + dec->alpha_data_ = headers.alpha_data; + dec->alpha_data_size_ = headers.alpha_data_size; + + // Decode bitstream header, update io->width/io->height. + if (!VP8GetHeaders(dec, &io)) { + status = dec->status_; // An error occurred. Grab error status. + } else { + // Allocate/check output buffers. + status = WebPAllocateDecBuffer(io.width, io.height, params->options, + params->output); + if (status == VP8_STATUS_OK) { // Decode + if (!VP8Decode(dec, &io)) { + status = dec->status_; + } + } + } + VP8Delete(dec); + } else { + VP8LDecoder* const dec = VP8LNew(); + if (dec == NULL) { + return VP8_STATUS_OUT_OF_MEMORY; + } + if (!VP8LDecodeHeader(dec, &io)) { + status = dec->status_; // An error occurred. Grab error status. + } else { + // Allocate/check output buffers. + status = WebPAllocateDecBuffer(io.width, io.height, params->options, + params->output); + if (status == VP8_STATUS_OK) { // Decode + if (!VP8LDecodeImage(dec)) { + status = dec->status_; + } + } + } + VP8LDelete(dec); + } + + if (status != VP8_STATUS_OK) { + WebPFreeDecBuffer(params->output); + } + return status; +} + +// Helpers +static uint8_t* DecodeIntoRGBABuffer(WEBP_CSP_MODE colorspace, + const uint8_t* const data, + size_t data_size, + uint8_t* const rgba, + int stride, size_t size) { + WebPDecParams params; + WebPDecBuffer buf; + if (rgba == NULL) { + return NULL; + } + WebPInitDecBuffer(&buf); + WebPResetDecParams(¶ms); + params.output = &buf; + buf.colorspace = colorspace; + buf.u.RGBA.rgba = rgba; + buf.u.RGBA.stride = stride; + buf.u.RGBA.size = size; + buf.is_external_memory = 1; + if (DecodeInto(data, data_size, ¶ms) != VP8_STATUS_OK) { + return NULL; + } + return rgba; +} + +uint8_t* WebPDecodeRGBInto(const uint8_t* data, size_t data_size, + uint8_t* output, size_t size, int stride) { + return DecodeIntoRGBABuffer(MODE_RGB, data, data_size, output, stride, size); +} + +uint8_t* WebPDecodeRGBAInto(const uint8_t* data, size_t data_size, + uint8_t* output, size_t size, int stride) { + return DecodeIntoRGBABuffer(MODE_RGBA, data, data_size, output, stride, size); +} + +uint8_t* WebPDecodeARGBInto(const uint8_t* data, size_t data_size, + uint8_t* output, size_t size, int stride) { + return DecodeIntoRGBABuffer(MODE_ARGB, data, data_size, output, stride, size); +} + +uint8_t* WebPDecodeBGRInto(const uint8_t* data, size_t data_size, + uint8_t* output, size_t size, int stride) { + return DecodeIntoRGBABuffer(MODE_BGR, data, data_size, output, stride, size); +} + +uint8_t* WebPDecodeBGRAInto(const uint8_t* data, size_t data_size, + uint8_t* output, size_t size, int stride) { + return DecodeIntoRGBABuffer(MODE_BGRA, data, data_size, output, stride, size); +} + +uint8_t* WebPDecodeYUVInto(const uint8_t* data, size_t data_size, + uint8_t* luma, size_t luma_size, int luma_stride, + uint8_t* u, size_t u_size, int u_stride, + uint8_t* v, size_t v_size, int v_stride) { + WebPDecParams params; + WebPDecBuffer output; + if (luma == NULL) return NULL; + WebPInitDecBuffer(&output); + WebPResetDecParams(¶ms); + params.output = &output; + output.colorspace = MODE_YUV; + output.u.YUVA.y = luma; + output.u.YUVA.y_stride = luma_stride; + output.u.YUVA.y_size = luma_size; + output.u.YUVA.u = u; + output.u.YUVA.u_stride = u_stride; + output.u.YUVA.u_size = u_size; + output.u.YUVA.v = v; + output.u.YUVA.v_stride = v_stride; + output.u.YUVA.v_size = v_size; + output.is_external_memory = 1; + if (DecodeInto(data, data_size, ¶ms) != VP8_STATUS_OK) { + return NULL; + } + return luma; +} + +//------------------------------------------------------------------------------ + +static uint8_t* Decode(WEBP_CSP_MODE mode, const uint8_t* const data, + size_t data_size, int* const width, int* const height, + WebPDecBuffer* const keep_info) { + WebPDecParams params; + WebPDecBuffer output; + + WebPInitDecBuffer(&output); + WebPResetDecParams(¶ms); + params.output = &output; + output.colorspace = mode; + + // Retrieve (and report back) the required dimensions from bitstream. + if (!WebPGetInfo(data, data_size, &output.width, &output.height)) { + return NULL; + } + if (width != NULL) *width = output.width; + if (height != NULL) *height = output.height; + + // Decode + if (DecodeInto(data, data_size, ¶ms) != VP8_STATUS_OK) { + return NULL; + } + if (keep_info != NULL) { // keep track of the side-info + WebPCopyDecBuffer(&output, keep_info); + } + // return decoded samples (don't clear 'output'!) + return WebPIsRGBMode(mode) ? output.u.RGBA.rgba : output.u.YUVA.y; +} + +uint8_t* WebPDecodeRGB(const uint8_t* data, size_t data_size, + int* width, int* height) { + return Decode(MODE_RGB, data, data_size, width, height, NULL); +} + +uint8_t* WebPDecodeRGBA(const uint8_t* data, size_t data_size, + int* width, int* height) { + return Decode(MODE_RGBA, data, data_size, width, height, NULL); +} + +uint8_t* WebPDecodeARGB(const uint8_t* data, size_t data_size, + int* width, int* height) { + return Decode(MODE_ARGB, data, data_size, width, height, NULL); +} + +uint8_t* WebPDecodeBGR(const uint8_t* data, size_t data_size, + int* width, int* height) { + return Decode(MODE_BGR, data, data_size, width, height, NULL); +} + +uint8_t* WebPDecodeBGRA(const uint8_t* data, size_t data_size, + int* width, int* height) { + return Decode(MODE_BGRA, data, data_size, width, height, NULL); +} + +uint8_t* WebPDecodeYUV(const uint8_t* data, size_t data_size, + int* width, int* height, uint8_t** u, uint8_t** v, + int* stride, int* uv_stride) { + WebPDecBuffer output; // only to preserve the side-infos + uint8_t* const out = Decode(MODE_YUV, data, data_size, + width, height, &output); + + if (out != NULL) { + const WebPYUVABuffer* const buf = &output.u.YUVA; + *u = buf->u; + *v = buf->v; + *stride = buf->y_stride; + *uv_stride = buf->u_stride; + assert(buf->u_stride == buf->v_stride); + } + return out; +} + +static void DefaultFeatures(WebPBitstreamFeatures* const features) { + assert(features != NULL); + memset(features, 0, sizeof(*features)); + features->bitstream_version = 0; +} + +static VP8StatusCode GetFeatures(const uint8_t* const data, size_t data_size, + WebPBitstreamFeatures* const features) { + if (features == NULL || data == NULL) { + return VP8_STATUS_INVALID_PARAM; + } + DefaultFeatures(features); + + // Only parse enough of the data to retrieve width/height/has_alpha. + return ParseHeadersInternal(data, data_size, + &features->width, &features->height, + &features->has_alpha, NULL); +} + +//------------------------------------------------------------------------------ +// WebPGetInfo() + +int WebPGetInfo(const uint8_t* data, size_t data_size, + int* width, int* height) { + WebPBitstreamFeatures features; + + if (GetFeatures(data, data_size, &features) != VP8_STATUS_OK) { + return 0; + } + + if (width != NULL) { + *width = features.width; + } + if (height != NULL) { + *height = features.height; + } + + return 1; +} + +//------------------------------------------------------------------------------ +// Advance decoding API + +int WebPInitDecoderConfigInternal(WebPDecoderConfig* config, + int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_DECODER_ABI_VERSION)) { + return 0; // version mismatch + } + if (config == NULL) { + return 0; + } + memset(config, 0, sizeof(*config)); + DefaultFeatures(&config->input); + WebPInitDecBuffer(&config->output); + return 1; +} + +VP8StatusCode WebPGetFeaturesInternal(const uint8_t* data, size_t data_size, + WebPBitstreamFeatures* features, + int version) { + VP8StatusCode status; + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_DECODER_ABI_VERSION)) { + return VP8_STATUS_INVALID_PARAM; // version mismatch + } + if (features == NULL) { + return VP8_STATUS_INVALID_PARAM; + } + + status = GetFeatures(data, data_size, features); + if (status == VP8_STATUS_NOT_ENOUGH_DATA) { + return VP8_STATUS_BITSTREAM_ERROR; // Not-enough-data treated as error. + } + return status; +} + +VP8StatusCode WebPDecode(const uint8_t* data, size_t data_size, + WebPDecoderConfig* config) { + WebPDecParams params; + VP8StatusCode status; + + if (config == NULL) { + return VP8_STATUS_INVALID_PARAM; + } + + status = GetFeatures(data, data_size, &config->input); + if (status != VP8_STATUS_OK) { + if (status == VP8_STATUS_NOT_ENOUGH_DATA) { + return VP8_STATUS_BITSTREAM_ERROR; // Not-enough-data treated as error. + } + return status; + } + + WebPResetDecParams(¶ms); + params.output = &config->output; + params.options = &config->options; + status = DecodeInto(data, data_size, ¶ms); + + return status; +} + +//------------------------------------------------------------------------------ +// Cropping and rescaling. + +int WebPIoInitFromOptions(const WebPDecoderOptions* const options, + VP8Io* const io, WEBP_CSP_MODE src_colorspace) { + const int W = io->width; + const int H = io->height; + int x = 0, y = 0, w = W, h = H; + + // Cropping + io->use_cropping = (options != NULL) && (options->use_cropping > 0); + if (io->use_cropping) { + w = options->crop_width; + h = options->crop_height; + x = options->crop_left; + y = options->crop_top; + if (!WebPIsRGBMode(src_colorspace)) { // only snap for YUV420 or YUV422 + x &= ~1; + y &= ~1; // TODO(later): only for YUV420, not YUV422. + } + if (x < 0 || y < 0 || w <= 0 || h <= 0 || x + w > W || y + h > H) { + return 0; // out of frame boundary error + } + } + io->crop_left = x; + io->crop_top = y; + io->crop_right = x + w; + io->crop_bottom = y + h; + io->mb_w = w; + io->mb_h = h; + + // Scaling + io->use_scaling = (options != NULL) && (options->use_scaling > 0); + if (io->use_scaling) { + if (options->scaled_width <= 0 || options->scaled_height <= 0) { + return 0; + } + io->scaled_width = options->scaled_width; + io->scaled_height = options->scaled_height; + } + + // Filter + io->bypass_filtering = options && options->bypass_filtering; + + // Fancy upsampler +#ifdef FANCY_UPSAMPLING + io->fancy_upsampling = (options == NULL) || (!options->no_fancy_upsampling); +#endif + + if (io->use_scaling) { + // disable filter (only for large downscaling ratio). + io->bypass_filtering = (io->scaled_width < W * 3 / 4) && + (io->scaled_height < H * 3 / 4); + io->fancy_upsampling = 0; + } + return 1; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dec/webpi.h b/drivers/webpold/dec/webpi.h new file mode 100644 index 0000000000..44e5744411 --- /dev/null +++ b/drivers/webpold/dec/webpi.h @@ -0,0 +1,114 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Internal header: WebP decoding parameters and custom IO on buffer +// +// Author: somnath@google.com (Somnath Banerjee) + +#ifndef WEBP_DEC_WEBPI_H_ +#define WEBP_DEC_WEBPI_H_ + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#include "../utils/rescaler.h" +#include "./decode_vp8.h" + +//------------------------------------------------------------------------------ +// WebPDecParams: Decoding output parameters. Transient internal object. + +typedef struct WebPDecParams WebPDecParams; +typedef int (*OutputFunc)(const VP8Io* const io, WebPDecParams* const p); +typedef int (*OutputRowFunc)(WebPDecParams* const p, int y_pos); + +struct WebPDecParams { + WebPDecBuffer* output; // output buffer. + uint8_t* tmp_y, *tmp_u, *tmp_v; // cache for the fancy upsampler + // or used for tmp rescaling + + int last_y; // coordinate of the line that was last output + const WebPDecoderOptions* options; // if not NULL, use alt decoding features + // rescalers + WebPRescaler scaler_y, scaler_u, scaler_v, scaler_a; + void* memory; // overall scratch memory for the output work. + + OutputFunc emit; // output RGB or YUV samples + OutputFunc emit_alpha; // output alpha channel + OutputRowFunc emit_alpha_row; // output one line of rescaled alpha values +}; + +// Should be called first, before any use of the WebPDecParams object. +void WebPResetDecParams(WebPDecParams* const params); + +//------------------------------------------------------------------------------ +// Header parsing helpers + +// Structure storing a description of the RIFF headers. +typedef struct { + const uint8_t* data; // input buffer + size_t data_size; // input buffer size + size_t offset; // offset to main data chunk (VP8 or VP8L) + const uint8_t* alpha_data; // points to alpha chunk (if present) + size_t alpha_data_size; // alpha chunk size + size_t compressed_size; // VP8/VP8L compressed data size + size_t riff_size; // size of the riff payload (or 0 if absent) + int is_lossless; // true if a VP8L chunk is present +} WebPHeaderStructure; + +// Skips over all valid chunks prior to the first VP8/VP8L frame header. +// Returns VP8_STATUS_OK on success, +// VP8_STATUS_BITSTREAM_ERROR if an invalid header/chunk is found, and +// VP8_STATUS_NOT_ENOUGH_DATA if case of insufficient data. +// In 'headers', compressed_size, offset, alpha_data, alpha_size and lossless +// fields are updated appropriately upon success. +VP8StatusCode WebPParseHeaders(WebPHeaderStructure* const headers); + +//------------------------------------------------------------------------------ +// Misc utils + +// Initializes VP8Io with custom setup, io and teardown functions. The default +// hooks will use the supplied 'params' as io->opaque handle. +void WebPInitCustomIo(WebPDecParams* const params, VP8Io* const io); + +// Setup crop_xxx fields, mb_w and mb_h in io. 'src_colorspace' refers +// to the *compressed* format, not the output one. +int WebPIoInitFromOptions(const WebPDecoderOptions* const options, + VP8Io* const io, WEBP_CSP_MODE src_colorspace); + +//------------------------------------------------------------------------------ +// Internal functions regarding WebPDecBuffer memory (in buffer.c). +// Don't really need to be externally visible for now. + +// Prepare 'buffer' with the requested initial dimensions width/height. +// If no external storage is supplied, initializes buffer by allocating output +// memory and setting up the stride information. Validate the parameters. Return +// an error code in case of problem (no memory, or invalid stride / size / +// dimension / etc.). If *options is not NULL, also verify that the options' +// parameters are valid and apply them to the width/height dimensions of the +// output buffer. This takes cropping / scaling / rotation into account. +VP8StatusCode WebPAllocateDecBuffer(int width, int height, + const WebPDecoderOptions* const options, + WebPDecBuffer* const buffer); + +// Copy 'src' into 'dst' buffer, making sure 'dst' is not marked as owner of the +// memory (still held by 'src'). +void WebPCopyDecBuffer(const WebPDecBuffer* const src, + WebPDecBuffer* const dst); + +// Copy and transfer ownership from src to dst (beware of parameter order!) +void WebPGrabDecBuffer(WebPDecBuffer* const src, WebPDecBuffer* const dst); + + + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_DEC_WEBPI_H_ */ diff --git a/drivers/webpold/decode.h b/drivers/webpold/decode.h new file mode 100644 index 0000000000..43b6c58f4f --- /dev/null +++ b/drivers/webpold/decode.h @@ -0,0 +1,454 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Main decoding functions for WebP images. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_WEBP_DECODE_H_ +#define WEBP_WEBP_DECODE_H_ + +#include "./types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define WEBP_DECODER_ABI_VERSION 0x0200 // MAJOR(8b) + MINOR(8b) + +// Return the decoder's version number, packed in hexadecimal using 8bits for +// each of major/minor/revision. E.g: v2.5.7 is 0x020507. +WEBP_EXTERN(int) WebPGetDecoderVersion(void); + +// Retrieve basic header information: width, height. +// This function will also validate the header and return 0 in +// case of formatting error. +// Pointers 'width' and 'height' can be passed NULL if deemed irrelevant. +WEBP_EXTERN(int) WebPGetInfo(const uint8_t* data, size_t data_size, + int* width, int* height); + +// Decodes WebP images pointed to by 'data' and returns RGBA samples, along +// with the dimensions in *width and *height. The ordering of samples in +// memory is R, G, B, A, R, G, B, A... in scan order (endian-independent). +// The returned pointer should be deleted calling free(). +// Returns NULL in case of error. +WEBP_EXTERN(uint8_t*) WebPDecodeRGBA(const uint8_t* data, size_t data_size, + int* width, int* height); + +// Same as WebPDecodeRGBA, but returning A, R, G, B, A, R, G, B... ordered data. +WEBP_EXTERN(uint8_t*) WebPDecodeARGB(const uint8_t* data, size_t data_size, + int* width, int* height); + +// Same as WebPDecodeRGBA, but returning B, G, R, A, B, G, R, A... ordered data. +WEBP_EXTERN(uint8_t*) WebPDecodeBGRA(const uint8_t* data, size_t data_size, + int* width, int* height); + +// Same as WebPDecodeRGBA, but returning R, G, B, R, G, B... ordered data. +// If the bitstream contains transparency, it is ignored. +WEBP_EXTERN(uint8_t*) WebPDecodeRGB(const uint8_t* data, size_t data_size, + int* width, int* height); + +// Same as WebPDecodeRGB, but returning B, G, R, B, G, R... ordered data. +WEBP_EXTERN(uint8_t*) WebPDecodeBGR(const uint8_t* data, size_t data_size, + int* width, int* height); + + +// Decode WebP images pointed to by 'data' to Y'UV format(*). The pointer +// returned is the Y samples buffer. Upon return, *u and *v will point to +// the U and V chroma data. These U and V buffers need NOT be free()'d, +// unlike the returned Y luma one. The dimension of the U and V planes +// are both (*width + 1) / 2 and (*height + 1)/ 2. +// Upon return, the Y buffer has a stride returned as '*stride', while U and V +// have a common stride returned as '*uv_stride'. +// Return NULL in case of error. +// (*) Also named Y'CbCr. See: http://en.wikipedia.org/wiki/YCbCr +WEBP_EXTERN(uint8_t*) WebPDecodeYUV(const uint8_t* data, size_t data_size, + int* width, int* height, + uint8_t** u, uint8_t** v, + int* stride, int* uv_stride); + +// These five functions are variants of the above ones, that decode the image +// directly into a pre-allocated buffer 'output_buffer'. The maximum storage +// available in this buffer is indicated by 'output_buffer_size'. If this +// storage is not sufficient (or an error occurred), NULL is returned. +// Otherwise, output_buffer is returned, for convenience. +// The parameter 'output_stride' specifies the distance (in bytes) +// between scanlines. Hence, output_buffer_size is expected to be at least +// output_stride x picture-height. +WEBP_EXTERN(uint8_t*) WebPDecodeRGBAInto( + const uint8_t* data, size_t data_size, + uint8_t* output_buffer, size_t output_buffer_size, int output_stride); +WEBP_EXTERN(uint8_t*) WebPDecodeARGBInto( + const uint8_t* data, size_t data_size, + uint8_t* output_buffer, size_t output_buffer_size, int output_stride); +WEBP_EXTERN(uint8_t*) WebPDecodeBGRAInto( + const uint8_t* data, size_t data_size, + uint8_t* output_buffer, size_t output_buffer_size, int output_stride); + +// RGB and BGR variants. Here too the transparency information, if present, +// will be dropped and ignored. +WEBP_EXTERN(uint8_t*) WebPDecodeRGBInto( + const uint8_t* data, size_t data_size, + uint8_t* output_buffer, size_t output_buffer_size, int output_stride); +WEBP_EXTERN(uint8_t*) WebPDecodeBGRInto( + const uint8_t* data, size_t data_size, + uint8_t* output_buffer, size_t output_buffer_size, int output_stride); + +// WebPDecodeYUVInto() is a variant of WebPDecodeYUV() that operates directly +// into pre-allocated luma/chroma plane buffers. This function requires the +// strides to be passed: one for the luma plane and one for each of the +// chroma ones. The size of each plane buffer is passed as 'luma_size', +// 'u_size' and 'v_size' respectively. +// Pointer to the luma plane ('*luma') is returned or NULL if an error occurred +// during decoding (or because some buffers were found to be too small). +WEBP_EXTERN(uint8_t*) WebPDecodeYUVInto( + const uint8_t* data, size_t data_size, + uint8_t* luma, size_t luma_size, int luma_stride, + uint8_t* u, size_t u_size, int u_stride, + uint8_t* v, size_t v_size, int v_stride); + +//------------------------------------------------------------------------------ +// Output colorspaces and buffer + +// Colorspaces +// Note: the naming describes the byte-ordering of packed samples in memory. +// For instance, MODE_BGRA relates to samples ordered as B,G,R,A,B,G,R,A,... +// Non-capital names (e.g.:MODE_Argb) relates to pre-multiplied RGB channels. +// RGB-565 and RGBA-4444 are also endian-agnostic and byte-oriented. +typedef enum { MODE_RGB = 0, MODE_RGBA = 1, + MODE_BGR = 2, MODE_BGRA = 3, + MODE_ARGB = 4, MODE_RGBA_4444 = 5, + MODE_RGB_565 = 6, + // RGB-premultiplied transparent modes (alpha value is preserved) + MODE_rgbA = 7, + MODE_bgrA = 8, + MODE_Argb = 9, + MODE_rgbA_4444 = 10, + // YUV modes must come after RGB ones. + MODE_YUV = 11, MODE_YUVA = 12, // yuv 4:2:0 + MODE_LAST = 13 + } WEBP_CSP_MODE; + +// Some useful macros: +static WEBP_INLINE int WebPIsPremultipliedMode(WEBP_CSP_MODE mode) { + return (mode == MODE_rgbA || mode == MODE_bgrA || mode == MODE_Argb || + mode == MODE_rgbA_4444); +} + +static WEBP_INLINE int WebPIsAlphaMode(WEBP_CSP_MODE mode) { + return (mode == MODE_RGBA || mode == MODE_BGRA || mode == MODE_ARGB || + mode == MODE_RGBA_4444 || mode == MODE_YUVA || + WebPIsPremultipliedMode(mode)); +} + +static WEBP_INLINE int WebPIsRGBMode(WEBP_CSP_MODE mode) { + return (mode < MODE_YUV); +} + +//------------------------------------------------------------------------------ +// WebPDecBuffer: Generic structure for describing the output sample buffer. + +typedef struct { // view as RGBA + uint8_t* rgba; // pointer to RGBA samples + int stride; // stride in bytes from one scanline to the next. + size_t size; // total size of the *rgba buffer. +} WebPRGBABuffer; + +typedef struct { // view as YUVA + uint8_t* y, *u, *v, *a; // pointer to luma, chroma U/V, alpha samples + int y_stride; // luma stride + int u_stride, v_stride; // chroma strides + int a_stride; // alpha stride + size_t y_size; // luma plane size + size_t u_size, v_size; // chroma planes size + size_t a_size; // alpha-plane size +} WebPYUVABuffer; + +// Output buffer +typedef struct { + WEBP_CSP_MODE colorspace; // Colorspace. + int width, height; // Dimensions. + int is_external_memory; // If true, 'internal_memory' pointer is not used. + union { + WebPRGBABuffer RGBA; + WebPYUVABuffer YUVA; + } u; // Nameless union of buffer parameters. + uint32_t pad[4]; // padding for later use + + uint8_t* private_memory; // Internally allocated memory (only when + // is_external_memory is false). Should not be used + // externally, but accessed via the buffer union. +} WebPDecBuffer; + +// Internal, version-checked, entry point +WEBP_EXTERN(int) WebPInitDecBufferInternal(WebPDecBuffer*, int); + +// Initialize the structure as empty. Must be called before any other use. +// Returns false in case of version mismatch +static WEBP_INLINE int WebPInitDecBuffer(WebPDecBuffer* buffer) { + return WebPInitDecBufferInternal(buffer, WEBP_DECODER_ABI_VERSION); +} + +// Free any memory associated with the buffer. Must always be called last. +// Note: doesn't free the 'buffer' structure itself. +WEBP_EXTERN(void) WebPFreeDecBuffer(WebPDecBuffer* buffer); + +//------------------------------------------------------------------------------ +// Enumeration of the status codes + +typedef enum { + VP8_STATUS_OK = 0, + VP8_STATUS_OUT_OF_MEMORY, + VP8_STATUS_INVALID_PARAM, + VP8_STATUS_BITSTREAM_ERROR, + VP8_STATUS_UNSUPPORTED_FEATURE, + VP8_STATUS_SUSPENDED, + VP8_STATUS_USER_ABORT, + VP8_STATUS_NOT_ENOUGH_DATA +} VP8StatusCode; + +//------------------------------------------------------------------------------ +// Incremental decoding +// +// This API allows streamlined decoding of partial data. +// Picture can be incrementally decoded as data become available thanks to the +// WebPIDecoder object. This object can be left in a SUSPENDED state if the +// picture is only partially decoded, pending additional input. +// Code example: +// +// WebPInitDecBuffer(&buffer); +// buffer.colorspace = mode; +// ... +// WebPIDecoder* idec = WebPINewDecoder(&buffer); +// while (has_more_data) { +// // ... (get additional data) +// status = WebPIAppend(idec, new_data, new_data_size); +// if (status != VP8_STATUS_SUSPENDED || +// break; +// } +// +// // The above call decodes the current available buffer. +// // Part of the image can now be refreshed by calling to +// // WebPIDecGetRGB()/WebPIDecGetYUVA() etc. +// } +// WebPIDelete(idec); + +typedef struct WebPIDecoder WebPIDecoder; + +// Creates a new incremental decoder with the supplied buffer parameter. +// This output_buffer can be passed NULL, in which case a default output buffer +// is used (with MODE_RGB). Otherwise, an internal reference to 'output_buffer' +// is kept, which means that the lifespan of 'output_buffer' must be larger than +// that of the returned WebPIDecoder object. +// Returns NULL if the allocation failed. +WEBP_EXTERN(WebPIDecoder*) WebPINewDecoder(WebPDecBuffer* output_buffer); + +// This function allocates and initializes an incremental-decoder object, which +// will output the RGB/A samples specified by 'csp' into a preallocated +// buffer 'output_buffer'. The size of this buffer is at least +// 'output_buffer_size' and the stride (distance in bytes between two scanlines) +// is specified by 'output_stride'. Returns NULL if the allocation failed. +WEBP_EXTERN(WebPIDecoder*) WebPINewRGB( + WEBP_CSP_MODE csp, + uint8_t* output_buffer, size_t output_buffer_size, int output_stride); + +// This function allocates and initializes an incremental-decoder object, which +// will output the raw luma/chroma samples into a preallocated planes. The luma +// plane is specified by its pointer 'luma', its size 'luma_size' and its stride +// 'luma_stride'. Similarly, the chroma-u plane is specified by the 'u', +// 'u_size' and 'u_stride' parameters, and the chroma-v plane by 'v' +// and 'v_size'. And same for the alpha-plane. The 'a' pointer can be pass +// NULL in case one is not interested in the transparency plane. +// Returns NULL if the allocation failed. +WEBP_EXTERN(WebPIDecoder*) WebPINewYUVA( + uint8_t* luma, size_t luma_size, int luma_stride, + uint8_t* u, size_t u_size, int u_stride, + uint8_t* v, size_t v_size, int v_stride, + uint8_t* a, size_t a_size, int a_stride); + +// Deprecated version of the above, without the alpha plane. +// Kept for backward compatibility. +WEBP_EXTERN(WebPIDecoder*) WebPINewYUV( + uint8_t* luma, size_t luma_size, int luma_stride, + uint8_t* u, size_t u_size, int u_stride, + uint8_t* v, size_t v_size, int v_stride); + +// Deletes the WebPIDecoder object and associated memory. Must always be called +// if WebPINewDecoder, WebPINewRGB or WebPINewYUV succeeded. +WEBP_EXTERN(void) WebPIDelete(WebPIDecoder* idec); + +// Copies and decodes the next available data. Returns VP8_STATUS_OK when +// the image is successfully decoded. Returns VP8_STATUS_SUSPENDED when more +// data is expected. Returns error in other cases. +WEBP_EXTERN(VP8StatusCode) WebPIAppend( + WebPIDecoder* idec, const uint8_t* data, size_t data_size); + +// A variant of the above function to be used when data buffer contains +// partial data from the beginning. In this case data buffer is not copied +// to the internal memory. +// Note that the value of the 'data' pointer can change between calls to +// WebPIUpdate, for instance when the data buffer is resized to fit larger data. +WEBP_EXTERN(VP8StatusCode) WebPIUpdate( + WebPIDecoder* idec, const uint8_t* data, size_t data_size); + +// Returns the RGB/A image decoded so far. Returns NULL if output params +// are not initialized yet. The RGB/A output type corresponds to the colorspace +// specified during call to WebPINewDecoder() or WebPINewRGB(). +// *last_y is the index of last decoded row in raster scan order. Some pointers +// (*last_y, *width etc.) can be NULL if corresponding information is not +// needed. +WEBP_EXTERN(uint8_t*) WebPIDecGetRGB( + const WebPIDecoder* idec, int* last_y, + int* width, int* height, int* stride); + +// Same as above function to get a YUVA image. Returns pointer to the luma +// plane or NULL in case of error. If there is no alpha information +// the alpha pointer '*a' will be returned NULL. +WEBP_EXTERN(uint8_t*) WebPIDecGetYUVA( + const WebPIDecoder* idec, int* last_y, + uint8_t** u, uint8_t** v, uint8_t** a, + int* width, int* height, int* stride, int* uv_stride, int* a_stride); + +// Deprecated alpha-less version of WebPIDecGetYUVA(): it will ignore the +// alpha information (if present). Kept for backward compatibility. +static WEBP_INLINE uint8_t* WebPIDecGetYUV( + const WebPIDecoder* idec, int* last_y, uint8_t** u, uint8_t** v, + int* width, int* height, int* stride, int* uv_stride) { + return WebPIDecGetYUVA(idec, last_y, u, v, NULL, width, height, + stride, uv_stride, NULL); +} + +// Generic call to retrieve information about the displayable area. +// If non NULL, the left/right/width/height pointers are filled with the visible +// rectangular area so far. +// Returns NULL in case the incremental decoder object is in an invalid state. +// Otherwise returns the pointer to the internal representation. This structure +// is read-only, tied to WebPIDecoder's lifespan and should not be modified. +WEBP_EXTERN(const WebPDecBuffer*) WebPIDecodedArea( + const WebPIDecoder* idec, int* left, int* top, int* width, int* height); + +//------------------------------------------------------------------------------ +// Advanced decoding parametrization +// +// Code sample for using the advanced decoding API +/* + // A) Init a configuration object + WebPDecoderConfig config; + CHECK(WebPInitDecoderConfig(&config)); + + // B) optional: retrieve the bitstream's features. + CHECK(WebPGetFeatures(data, data_size, &config.input) == VP8_STATUS_OK); + + // C) Adjust 'config', if needed + config.no_fancy = 1; + config.output.colorspace = MODE_BGRA; + // etc. + + // Note that you can also make config.output point to an externally + // supplied memory buffer, provided it's big enough to store the decoded + // picture. Otherwise, config.output will just be used to allocate memory + // and store the decoded picture. + + // D) Decode! + CHECK(WebPDecode(data, data_size, &config) == VP8_STATUS_OK); + + // E) Decoded image is now in config.output (and config.output.u.RGBA) + + // F) Reclaim memory allocated in config's object. It's safe to call + // this function even if the memory is external and wasn't allocated + // by WebPDecode(). + WebPFreeDecBuffer(&config.output); +*/ + +// Features gathered from the bitstream +typedef struct { + int width; // Width in pixels, as read from the bitstream. + int height; // Height in pixels, as read from the bitstream. + int has_alpha; // True if the bitstream contains an alpha channel. + + // Unused for now: + int bitstream_version; // should be 0 for now. TODO(later) + int no_incremental_decoding; // if true, using incremental decoding is not + // recommended. + int rotate; // TODO(later) + int uv_sampling; // should be 0 for now. TODO(later) + uint32_t pad[3]; // padding for later use +} WebPBitstreamFeatures; + +// Internal, version-checked, entry point +WEBP_EXTERN(VP8StatusCode) WebPGetFeaturesInternal( + const uint8_t*, size_t, WebPBitstreamFeatures*, int); + +// Retrieve features from the bitstream. The *features structure is filled +// with information gathered from the bitstream. +// Returns false in case of error or version mismatch. +// In case of error, features->bitstream_status will reflect the error code. +static WEBP_INLINE VP8StatusCode WebPGetFeatures( + const uint8_t* data, size_t data_size, + WebPBitstreamFeatures* features) { + return WebPGetFeaturesInternal(data, data_size, features, + WEBP_DECODER_ABI_VERSION); +} + +// Decoding options +typedef struct { + int bypass_filtering; // if true, skip the in-loop filtering + int no_fancy_upsampling; // if true, use faster pointwise upsampler + int use_cropping; // if true, cropping is applied _first_ + int crop_left, crop_top; // top-left position for cropping. + // Will be snapped to even values. + int crop_width, crop_height; // dimension of the cropping area + int use_scaling; // if true, scaling is applied _afterward_ + int scaled_width, scaled_height; // final resolution + int use_threads; // if true, use multi-threaded decoding + + // Unused for now: + int force_rotation; // forced rotation (to be applied _last_) + int no_enhancement; // if true, discard enhancement layer + uint32_t pad[6]; // padding for later use +} WebPDecoderOptions; + +// Main object storing the configuration for advanced decoding. +typedef struct { + WebPBitstreamFeatures input; // Immutable bitstream features (optional) + WebPDecBuffer output; // Output buffer (can point to external mem) + WebPDecoderOptions options; // Decoding options +} WebPDecoderConfig; + +// Internal, version-checked, entry point +WEBP_EXTERN(int) WebPInitDecoderConfigInternal(WebPDecoderConfig*, int); + +// Initialize the configuration as empty. This function must always be +// called first, unless WebPGetFeatures() is to be called. +// Returns false in case of mismatched version. +static WEBP_INLINE int WebPInitDecoderConfig(WebPDecoderConfig* config) { + return WebPInitDecoderConfigInternal(config, WEBP_DECODER_ABI_VERSION); +} + +// Instantiate a new incremental decoder object with the requested +// configuration. The bitstream can be passed using 'data' and 'data_size' +// parameter, in which case the features will be parsed and stored into +// config->input. Otherwise, 'data' can be NULL and no parsing will occur. +// Note that 'config' can be NULL too, in which case a default configuration +// is used. +// The return WebPIDecoder object must always be deleted calling WebPIDelete(). +// Returns NULL in case of error (and config->status will then reflect +// the error condition). +WEBP_EXTERN(WebPIDecoder*) WebPIDecode(const uint8_t* data, size_t data_size, + WebPDecoderConfig* config); + +// Non-incremental version. This version decodes the full data at once, taking +// 'config' into account. Returns decoding status (which should be VP8_STATUS_OK +// if the decoding was successful). +WEBP_EXTERN(VP8StatusCode) WebPDecode(const uint8_t* data, size_t data_size, + WebPDecoderConfig* config); + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_WEBP_DECODE_H_ */ diff --git a/drivers/webpold/dsp/cpu.c b/drivers/webpold/dsp/cpu.c new file mode 100644 index 0000000000..0228734457 --- /dev/null +++ b/drivers/webpold/dsp/cpu.c @@ -0,0 +1,85 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// CPU detection +// +// Author: Christian Duvivier (cduvivier@google.com) + +#include "./dsp.h" + +#if defined(__ANDROID__) +#include <cpu-features.h> +#endif + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// SSE2 detection. +// + +// apple/darwin gcc-4.0.1 defines __PIC__, but not __pic__ with -fPIC. +#if (defined(__pic__) || defined(__PIC__)) && defined(__i386__) +static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { + __asm__ volatile ( + "mov %%ebx, %%edi\n" + "cpuid\n" + "xchg %%edi, %%ebx\n" + : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) + : "a"(info_type)); +} +#elif defined(__i386__) || defined(__x86_64__) +static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { + __asm__ volatile ( + "cpuid\n" + : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) + : "a"(info_type)); +} +#elif defined(WEBP_MSC_SSE2) +#define GetCPUInfo __cpuid +#endif + +#if defined(__i386__) || defined(__x86_64__) || defined(WEBP_MSC_SSE2) +static int x86CPUInfo(CPUFeature feature) { + int cpu_info[4]; + GetCPUInfo(cpu_info, 1); + if (feature == kSSE2) { + return 0 != (cpu_info[3] & 0x04000000); + } + if (feature == kSSE3) { + return 0 != (cpu_info[2] & 0x00000001); + } + return 0; +} +VP8CPUInfo VP8GetCPUInfo = x86CPUInfo; +#elif defined(WEBP_ANDROID_NEON) +static int AndroidCPUInfo(CPUFeature feature) { + const AndroidCpuFamily cpu_family = android_getCpuFamily(); + const uint64_t cpu_features = android_getCpuFeatures(); + if (feature == kNEON) { + return (cpu_family == ANDROID_CPU_FAMILY_ARM && + 0 != (cpu_features & ANDROID_CPU_ARM_FEATURE_NEON)); + } + return 0; +} +VP8CPUInfo VP8GetCPUInfo = AndroidCPUInfo; +#elif defined(__ARM_NEON__) +// define a dummy function to enable turning off NEON at runtime by setting +// VP8DecGetCPUInfo = NULL +static int armCPUInfo(CPUFeature feature) { + (void)feature; + return 1; +} +VP8CPUInfo VP8GetCPUInfo = armCPUInfo; +#else +VP8CPUInfo VP8GetCPUInfo = NULL; +#endif + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dsp/dec.c b/drivers/webpold/dsp/dec.c new file mode 100644 index 0000000000..9ae7b6fa76 --- /dev/null +++ b/drivers/webpold/dsp/dec.c @@ -0,0 +1,732 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Speed-critical decoding functions. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" +#include "../dec/vp8i.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// run-time tables (~4k) + +static uint8_t abs0[255 + 255 + 1]; // abs(i) +static uint8_t abs1[255 + 255 + 1]; // abs(i)>>1 +static int8_t sclip1[1020 + 1020 + 1]; // clips [-1020, 1020] to [-128, 127] +static int8_t sclip2[112 + 112 + 1]; // clips [-112, 112] to [-16, 15] +static uint8_t clip1[255 + 510 + 1]; // clips [-255,510] to [0,255] + +// We declare this variable 'volatile' to prevent instruction reordering +// and make sure it's set to true _last_ (so as to be thread-safe) +static volatile int tables_ok = 0; + +static void DspInitTables(void) { + if (!tables_ok) { + int i; + for (i = -255; i <= 255; ++i) { + abs0[255 + i] = (i < 0) ? -i : i; + abs1[255 + i] = abs0[255 + i] >> 1; + } + for (i = -1020; i <= 1020; ++i) { + sclip1[1020 + i] = (i < -128) ? -128 : (i > 127) ? 127 : i; + } + for (i = -112; i <= 112; ++i) { + sclip2[112 + i] = (i < -16) ? -16 : (i > 15) ? 15 : i; + } + for (i = -255; i <= 255 + 255; ++i) { + clip1[255 + i] = (i < 0) ? 0 : (i > 255) ? 255 : i; + } + tables_ok = 1; + } +} + +static WEBP_INLINE uint8_t clip_8b(int v) { + return (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255; +} + +//------------------------------------------------------------------------------ +// Transforms (Paragraph 14.4) + +#define STORE(x, y, v) \ + dst[x + y * BPS] = clip_8b(dst[x + y * BPS] + ((v) >> 3)) + +static const int kC1 = 20091 + (1 << 16); +static const int kC2 = 35468; +#define MUL(a, b) (((a) * (b)) >> 16) + +static void TransformOne(const int16_t* in, uint8_t* dst) { + int C[4 * 4], *tmp; + int i; + tmp = C; + for (i = 0; i < 4; ++i) { // vertical pass + const int a = in[0] + in[8]; // [-4096, 4094] + const int b = in[0] - in[8]; // [-4095, 4095] + const int c = MUL(in[4], kC2) - MUL(in[12], kC1); // [-3783, 3783] + const int d = MUL(in[4], kC1) + MUL(in[12], kC2); // [-3785, 3781] + tmp[0] = a + d; // [-7881, 7875] + tmp[1] = b + c; // [-7878, 7878] + tmp[2] = b - c; // [-7878, 7878] + tmp[3] = a - d; // [-7877, 7879] + tmp += 4; + in++; + } + // Each pass is expanding the dynamic range by ~3.85 (upper bound). + // The exact value is (2. + (kC1 + kC2) / 65536). + // After the second pass, maximum interval is [-3794, 3794], assuming + // an input in [-2048, 2047] interval. We then need to add a dst value + // in the [0, 255] range. + // In the worst case scenario, the input to clip_8b() can be as large as + // [-60713, 60968]. + tmp = C; + for (i = 0; i < 4; ++i) { // horizontal pass + const int dc = tmp[0] + 4; + const int a = dc + tmp[8]; + const int b = dc - tmp[8]; + const int c = MUL(tmp[4], kC2) - MUL(tmp[12], kC1); + const int d = MUL(tmp[4], kC1) + MUL(tmp[12], kC2); + STORE(0, 0, a + d); + STORE(1, 0, b + c); + STORE(2, 0, b - c); + STORE(3, 0, a - d); + tmp++; + dst += BPS; + } +} +#undef MUL + +static void TransformTwo(const int16_t* in, uint8_t* dst, int do_two) { + TransformOne(in, dst); + if (do_two) { + TransformOne(in + 16, dst + 4); + } +} + +static void TransformUV(const int16_t* in, uint8_t* dst) { + VP8Transform(in + 0 * 16, dst, 1); + VP8Transform(in + 2 * 16, dst + 4 * BPS, 1); +} + +static void TransformDC(const int16_t *in, uint8_t* dst) { + const int DC = in[0] + 4; + int i, j; + for (j = 0; j < 4; ++j) { + for (i = 0; i < 4; ++i) { + STORE(i, j, DC); + } + } +} + +static void TransformDCUV(const int16_t* in, uint8_t* dst) { + if (in[0 * 16]) TransformDC(in + 0 * 16, dst); + if (in[1 * 16]) TransformDC(in + 1 * 16, dst + 4); + if (in[2 * 16]) TransformDC(in + 2 * 16, dst + 4 * BPS); + if (in[3 * 16]) TransformDC(in + 3 * 16, dst + 4 * BPS + 4); +} + +#undef STORE + +//------------------------------------------------------------------------------ +// Paragraph 14.3 + +static void TransformWHT(const int16_t* in, int16_t* out) { + int tmp[16]; + int i; + for (i = 0; i < 4; ++i) { + const int a0 = in[0 + i] + in[12 + i]; + const int a1 = in[4 + i] + in[ 8 + i]; + const int a2 = in[4 + i] - in[ 8 + i]; + const int a3 = in[0 + i] - in[12 + i]; + tmp[0 + i] = a0 + a1; + tmp[8 + i] = a0 - a1; + tmp[4 + i] = a3 + a2; + tmp[12 + i] = a3 - a2; + } + for (i = 0; i < 4; ++i) { + const int dc = tmp[0 + i * 4] + 3; // w/ rounder + const int a0 = dc + tmp[3 + i * 4]; + const int a1 = tmp[1 + i * 4] + tmp[2 + i * 4]; + const int a2 = tmp[1 + i * 4] - tmp[2 + i * 4]; + const int a3 = dc - tmp[3 + i * 4]; + out[ 0] = (a0 + a1) >> 3; + out[16] = (a3 + a2) >> 3; + out[32] = (a0 - a1) >> 3; + out[48] = (a3 - a2) >> 3; + out += 64; + } +} + +void (*VP8TransformWHT)(const int16_t* in, int16_t* out) = TransformWHT; + +//------------------------------------------------------------------------------ +// Intra predictions + +#define DST(x, y) dst[(x) + (y) * BPS] + +static WEBP_INLINE void TrueMotion(uint8_t *dst, int size) { + const uint8_t* top = dst - BPS; + const uint8_t* const clip0 = clip1 + 255 - top[-1]; + int y; + for (y = 0; y < size; ++y) { + const uint8_t* const clip = clip0 + dst[-1]; + int x; + for (x = 0; x < size; ++x) { + dst[x] = clip[top[x]]; + } + dst += BPS; + } +} +static void TM4(uint8_t *dst) { TrueMotion(dst, 4); } +static void TM8uv(uint8_t *dst) { TrueMotion(dst, 8); } +static void TM16(uint8_t *dst) { TrueMotion(dst, 16); } + +//------------------------------------------------------------------------------ +// 16x16 + +static void VE16(uint8_t *dst) { // vertical + int j; + for (j = 0; j < 16; ++j) { + memcpy(dst + j * BPS, dst - BPS, 16); + } +} + +static void HE16(uint8_t *dst) { // horizontal + int j; + for (j = 16; j > 0; --j) { + memset(dst, dst[-1], 16); + dst += BPS; + } +} + +static WEBP_INLINE void Put16(int v, uint8_t* dst) { + int j; + for (j = 0; j < 16; ++j) { + memset(dst + j * BPS, v, 16); + } +} + +static void DC16(uint8_t *dst) { // DC + int DC = 16; + int j; + for (j = 0; j < 16; ++j) { + DC += dst[-1 + j * BPS] + dst[j - BPS]; + } + Put16(DC >> 5, dst); +} + +static void DC16NoTop(uint8_t *dst) { // DC with top samples not available + int DC = 8; + int j; + for (j = 0; j < 16; ++j) { + DC += dst[-1 + j * BPS]; + } + Put16(DC >> 4, dst); +} + +static void DC16NoLeft(uint8_t *dst) { // DC with left samples not available + int DC = 8; + int i; + for (i = 0; i < 16; ++i) { + DC += dst[i - BPS]; + } + Put16(DC >> 4, dst); +} + +static void DC16NoTopLeft(uint8_t *dst) { // DC with no top and left samples + Put16(0x80, dst); +} + +//------------------------------------------------------------------------------ +// 4x4 + +#define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2) +#define AVG2(a, b) (((a) + (b) + 1) >> 1) + +static void VE4(uint8_t *dst) { // vertical + const uint8_t* top = dst - BPS; + const uint8_t vals[4] = { + AVG3(top[-1], top[0], top[1]), + AVG3(top[ 0], top[1], top[2]), + AVG3(top[ 1], top[2], top[3]), + AVG3(top[ 2], top[3], top[4]) + }; + int i; + for (i = 0; i < 4; ++i) { + memcpy(dst + i * BPS, vals, sizeof(vals)); + } +} + +static void HE4(uint8_t *dst) { // horizontal + const int A = dst[-1 - BPS]; + const int B = dst[-1]; + const int C = dst[-1 + BPS]; + const int D = dst[-1 + 2 * BPS]; + const int E = dst[-1 + 3 * BPS]; + *(uint32_t*)(dst + 0 * BPS) = 0x01010101U * AVG3(A, B, C); + *(uint32_t*)(dst + 1 * BPS) = 0x01010101U * AVG3(B, C, D); + *(uint32_t*)(dst + 2 * BPS) = 0x01010101U * AVG3(C, D, E); + *(uint32_t*)(dst + 3 * BPS) = 0x01010101U * AVG3(D, E, E); +} + +static void DC4(uint8_t *dst) { // DC + uint32_t dc = 4; + int i; + for (i = 0; i < 4; ++i) dc += dst[i - BPS] + dst[-1 + i * BPS]; + dc >>= 3; + for (i = 0; i < 4; ++i) memset(dst + i * BPS, dc, 4); +} + +static void RD4(uint8_t *dst) { // Down-right + const int I = dst[-1 + 0 * BPS]; + const int J = dst[-1 + 1 * BPS]; + const int K = dst[-1 + 2 * BPS]; + const int L = dst[-1 + 3 * BPS]; + const int X = dst[-1 - BPS]; + const int A = dst[0 - BPS]; + const int B = dst[1 - BPS]; + const int C = dst[2 - BPS]; + const int D = dst[3 - BPS]; + DST(0, 3) = AVG3(J, K, L); + DST(0, 2) = DST(1, 3) = AVG3(I, J, K); + DST(0, 1) = DST(1, 2) = DST(2, 3) = AVG3(X, I, J); + DST(0, 0) = DST(1, 1) = DST(2, 2) = DST(3, 3) = AVG3(A, X, I); + DST(1, 0) = DST(2, 1) = DST(3, 2) = AVG3(B, A, X); + DST(2, 0) = DST(3, 1) = AVG3(C, B, A); + DST(3, 0) = AVG3(D, C, B); +} + +static void LD4(uint8_t *dst) { // Down-Left + const int A = dst[0 - BPS]; + const int B = dst[1 - BPS]; + const int C = dst[2 - BPS]; + const int D = dst[3 - BPS]; + const int E = dst[4 - BPS]; + const int F = dst[5 - BPS]; + const int G = dst[6 - BPS]; + const int H = dst[7 - BPS]; + DST(0, 0) = AVG3(A, B, C); + DST(1, 0) = DST(0, 1) = AVG3(B, C, D); + DST(2, 0) = DST(1, 1) = DST(0, 2) = AVG3(C, D, E); + DST(3, 0) = DST(2, 1) = DST(1, 2) = DST(0, 3) = AVG3(D, E, F); + DST(3, 1) = DST(2, 2) = DST(1, 3) = AVG3(E, F, G); + DST(3, 2) = DST(2, 3) = AVG3(F, G, H); + DST(3, 3) = AVG3(G, H, H); +} + +static void VR4(uint8_t *dst) { // Vertical-Right + const int I = dst[-1 + 0 * BPS]; + const int J = dst[-1 + 1 * BPS]; + const int K = dst[-1 + 2 * BPS]; + const int X = dst[-1 - BPS]; + const int A = dst[0 - BPS]; + const int B = dst[1 - BPS]; + const int C = dst[2 - BPS]; + const int D = dst[3 - BPS]; + DST(0, 0) = DST(1, 2) = AVG2(X, A); + DST(1, 0) = DST(2, 2) = AVG2(A, B); + DST(2, 0) = DST(3, 2) = AVG2(B, C); + DST(3, 0) = AVG2(C, D); + + DST(0, 3) = AVG3(K, J, I); + DST(0, 2) = AVG3(J, I, X); + DST(0, 1) = DST(1, 3) = AVG3(I, X, A); + DST(1, 1) = DST(2, 3) = AVG3(X, A, B); + DST(2, 1) = DST(3, 3) = AVG3(A, B, C); + DST(3, 1) = AVG3(B, C, D); +} + +static void VL4(uint8_t *dst) { // Vertical-Left + const int A = dst[0 - BPS]; + const int B = dst[1 - BPS]; + const int C = dst[2 - BPS]; + const int D = dst[3 - BPS]; + const int E = dst[4 - BPS]; + const int F = dst[5 - BPS]; + const int G = dst[6 - BPS]; + const int H = dst[7 - BPS]; + DST(0, 0) = AVG2(A, B); + DST(1, 0) = DST(0, 2) = AVG2(B, C); + DST(2, 0) = DST(1, 2) = AVG2(C, D); + DST(3, 0) = DST(2, 2) = AVG2(D, E); + + DST(0, 1) = AVG3(A, B, C); + DST(1, 1) = DST(0, 3) = AVG3(B, C, D); + DST(2, 1) = DST(1, 3) = AVG3(C, D, E); + DST(3, 1) = DST(2, 3) = AVG3(D, E, F); + DST(3, 2) = AVG3(E, F, G); + DST(3, 3) = AVG3(F, G, H); +} + +static void HU4(uint8_t *dst) { // Horizontal-Up + const int I = dst[-1 + 0 * BPS]; + const int J = dst[-1 + 1 * BPS]; + const int K = dst[-1 + 2 * BPS]; + const int L = dst[-1 + 3 * BPS]; + DST(0, 0) = AVG2(I, J); + DST(2, 0) = DST(0, 1) = AVG2(J, K); + DST(2, 1) = DST(0, 2) = AVG2(K, L); + DST(1, 0) = AVG3(I, J, K); + DST(3, 0) = DST(1, 1) = AVG3(J, K, L); + DST(3, 1) = DST(1, 2) = AVG3(K, L, L); + DST(3, 2) = DST(2, 2) = + DST(0, 3) = DST(1, 3) = DST(2, 3) = DST(3, 3) = L; +} + +static void HD4(uint8_t *dst) { // Horizontal-Down + const int I = dst[-1 + 0 * BPS]; + const int J = dst[-1 + 1 * BPS]; + const int K = dst[-1 + 2 * BPS]; + const int L = dst[-1 + 3 * BPS]; + const int X = dst[-1 - BPS]; + const int A = dst[0 - BPS]; + const int B = dst[1 - BPS]; + const int C = dst[2 - BPS]; + + DST(0, 0) = DST(2, 1) = AVG2(I, X); + DST(0, 1) = DST(2, 2) = AVG2(J, I); + DST(0, 2) = DST(2, 3) = AVG2(K, J); + DST(0, 3) = AVG2(L, K); + + DST(3, 0) = AVG3(A, B, C); + DST(2, 0) = AVG3(X, A, B); + DST(1, 0) = DST(3, 1) = AVG3(I, X, A); + DST(1, 1) = DST(3, 2) = AVG3(J, I, X); + DST(1, 2) = DST(3, 3) = AVG3(K, J, I); + DST(1, 3) = AVG3(L, K, J); +} + +#undef DST +#undef AVG3 +#undef AVG2 + +//------------------------------------------------------------------------------ +// Chroma + +static void VE8uv(uint8_t *dst) { // vertical + int j; + for (j = 0; j < 8; ++j) { + memcpy(dst + j * BPS, dst - BPS, 8); + } +} + +static void HE8uv(uint8_t *dst) { // horizontal + int j; + for (j = 0; j < 8; ++j) { + memset(dst, dst[-1], 8); + dst += BPS; + } +} + +// helper for chroma-DC predictions +static WEBP_INLINE void Put8x8uv(uint64_t v, uint8_t* dst) { + int j; + for (j = 0; j < 8; ++j) { + *(uint64_t*)(dst + j * BPS) = v; + } +} + +static void DC8uv(uint8_t *dst) { // DC + int dc0 = 8; + int i; + for (i = 0; i < 8; ++i) { + dc0 += dst[i - BPS] + dst[-1 + i * BPS]; + } + Put8x8uv((uint64_t)((dc0 >> 4) * 0x0101010101010101ULL), dst); +} + +static void DC8uvNoLeft(uint8_t *dst) { // DC with no left samples + int dc0 = 4; + int i; + for (i = 0; i < 8; ++i) { + dc0 += dst[i - BPS]; + } + Put8x8uv((uint64_t)((dc0 >> 3) * 0x0101010101010101ULL), dst); +} + +static void DC8uvNoTop(uint8_t *dst) { // DC with no top samples + int dc0 = 4; + int i; + for (i = 0; i < 8; ++i) { + dc0 += dst[-1 + i * BPS]; + } + Put8x8uv((uint64_t)((dc0 >> 3) * 0x0101010101010101ULL), dst); +} + +static void DC8uvNoTopLeft(uint8_t *dst) { // DC with nothing + Put8x8uv(0x8080808080808080ULL, dst); +} + +//------------------------------------------------------------------------------ +// default C implementations + +const VP8PredFunc VP8PredLuma4[NUM_BMODES] = { + DC4, TM4, VE4, HE4, RD4, VR4, LD4, VL4, HD4, HU4 +}; + +const VP8PredFunc VP8PredLuma16[NUM_B_DC_MODES] = { + DC16, TM16, VE16, HE16, + DC16NoTop, DC16NoLeft, DC16NoTopLeft +}; + +const VP8PredFunc VP8PredChroma8[NUM_B_DC_MODES] = { + DC8uv, TM8uv, VE8uv, HE8uv, + DC8uvNoTop, DC8uvNoLeft, DC8uvNoTopLeft +}; + +//------------------------------------------------------------------------------ +// Edge filtering functions + +// 4 pixels in, 2 pixels out +static WEBP_INLINE void do_filter2(uint8_t* p, int step) { + const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; + const int a = 3 * (q0 - p0) + sclip1[1020 + p1 - q1]; + const int a1 = sclip2[112 + ((a + 4) >> 3)]; + const int a2 = sclip2[112 + ((a + 3) >> 3)]; + p[-step] = clip1[255 + p0 + a2]; + p[ 0] = clip1[255 + q0 - a1]; +} + +// 4 pixels in, 4 pixels out +static WEBP_INLINE void do_filter4(uint8_t* p, int step) { + const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; + const int a = 3 * (q0 - p0); + const int a1 = sclip2[112 + ((a + 4) >> 3)]; + const int a2 = sclip2[112 + ((a + 3) >> 3)]; + const int a3 = (a1 + 1) >> 1; + p[-2*step] = clip1[255 + p1 + a3]; + p[- step] = clip1[255 + p0 + a2]; + p[ 0] = clip1[255 + q0 - a1]; + p[ step] = clip1[255 + q1 - a3]; +} + +// 6 pixels in, 6 pixels out +static WEBP_INLINE void do_filter6(uint8_t* p, int step) { + const int p2 = p[-3*step], p1 = p[-2*step], p0 = p[-step]; + const int q0 = p[0], q1 = p[step], q2 = p[2*step]; + const int a = sclip1[1020 + 3 * (q0 - p0) + sclip1[1020 + p1 - q1]]; + const int a1 = (27 * a + 63) >> 7; // eq. to ((3 * a + 7) * 9) >> 7 + const int a2 = (18 * a + 63) >> 7; // eq. to ((2 * a + 7) * 9) >> 7 + const int a3 = (9 * a + 63) >> 7; // eq. to ((1 * a + 7) * 9) >> 7 + p[-3*step] = clip1[255 + p2 + a3]; + p[-2*step] = clip1[255 + p1 + a2]; + p[- step] = clip1[255 + p0 + a1]; + p[ 0] = clip1[255 + q0 - a1]; + p[ step] = clip1[255 + q1 - a2]; + p[ 2*step] = clip1[255 + q2 - a3]; +} + +static WEBP_INLINE int hev(const uint8_t* p, int step, int thresh) { + const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; + return (abs0[255 + p1 - p0] > thresh) || (abs0[255 + q1 - q0] > thresh); +} + +static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int thresh) { + const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; + return (2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) <= thresh; +} + +static WEBP_INLINE int needs_filter2(const uint8_t* p, + int step, int t, int it) { + const int p3 = p[-4*step], p2 = p[-3*step], p1 = p[-2*step], p0 = p[-step]; + const int q0 = p[0], q1 = p[step], q2 = p[2*step], q3 = p[3*step]; + if ((2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) > t) + return 0; + return abs0[255 + p3 - p2] <= it && abs0[255 + p2 - p1] <= it && + abs0[255 + p1 - p0] <= it && abs0[255 + q3 - q2] <= it && + abs0[255 + q2 - q1] <= it && abs0[255 + q1 - q0] <= it; +} + +//------------------------------------------------------------------------------ +// Simple In-loop filtering (Paragraph 15.2) + +static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { + int i; + for (i = 0; i < 16; ++i) { + if (needs_filter(p + i, stride, thresh)) { + do_filter2(p + i, stride); + } + } +} + +static void SimpleHFilter16(uint8_t* p, int stride, int thresh) { + int i; + for (i = 0; i < 16; ++i) { + if (needs_filter(p + i * stride, 1, thresh)) { + do_filter2(p + i * stride, 1); + } + } +} + +static void SimpleVFilter16i(uint8_t* p, int stride, int thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4 * stride; + SimpleVFilter16(p, stride, thresh); + } +} + +static void SimpleHFilter16i(uint8_t* p, int stride, int thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4; + SimpleHFilter16(p, stride, thresh); + } +} + +//------------------------------------------------------------------------------ +// Complex In-loop filtering (Paragraph 15.3) + +static WEBP_INLINE void FilterLoop26(uint8_t* p, + int hstride, int vstride, int size, + int thresh, int ithresh, int hev_thresh) { + while (size-- > 0) { + if (needs_filter2(p, hstride, thresh, ithresh)) { + if (hev(p, hstride, hev_thresh)) { + do_filter2(p, hstride); + } else { + do_filter6(p, hstride); + } + } + p += vstride; + } +} + +static WEBP_INLINE void FilterLoop24(uint8_t* p, + int hstride, int vstride, int size, + int thresh, int ithresh, int hev_thresh) { + while (size-- > 0) { + if (needs_filter2(p, hstride, thresh, ithresh)) { + if (hev(p, hstride, hev_thresh)) { + do_filter2(p, hstride); + } else { + do_filter4(p, hstride); + } + } + p += vstride; + } +} + +// on macroblock edges +static void VFilter16(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + FilterLoop26(p, stride, 1, 16, thresh, ithresh, hev_thresh); +} + +static void HFilter16(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + FilterLoop26(p, 1, stride, 16, thresh, ithresh, hev_thresh); +} + +// on three inner edges +static void VFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4 * stride; + FilterLoop24(p, stride, 1, 16, thresh, ithresh, hev_thresh); + } +} + +static void HFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4; + FilterLoop24(p, 1, stride, 16, thresh, ithresh, hev_thresh); + } +} + +// 8-pixels wide variant, for chroma filtering +static void VFilter8(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + FilterLoop26(u, stride, 1, 8, thresh, ithresh, hev_thresh); + FilterLoop26(v, stride, 1, 8, thresh, ithresh, hev_thresh); +} + +static void HFilter8(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + FilterLoop26(u, 1, stride, 8, thresh, ithresh, hev_thresh); + FilterLoop26(v, 1, stride, 8, thresh, ithresh, hev_thresh); +} + +static void VFilter8i(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + FilterLoop24(u + 4 * stride, stride, 1, 8, thresh, ithresh, hev_thresh); + FilterLoop24(v + 4 * stride, stride, 1, 8, thresh, ithresh, hev_thresh); +} + +static void HFilter8i(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + FilterLoop24(u + 4, 1, stride, 8, thresh, ithresh, hev_thresh); + FilterLoop24(v + 4, 1, stride, 8, thresh, ithresh, hev_thresh); +} + +//------------------------------------------------------------------------------ + +VP8DecIdct2 VP8Transform; +VP8DecIdct VP8TransformUV; +VP8DecIdct VP8TransformDC; +VP8DecIdct VP8TransformDCUV; + +VP8LumaFilterFunc VP8VFilter16; +VP8LumaFilterFunc VP8HFilter16; +VP8ChromaFilterFunc VP8VFilter8; +VP8ChromaFilterFunc VP8HFilter8; +VP8LumaFilterFunc VP8VFilter16i; +VP8LumaFilterFunc VP8HFilter16i; +VP8ChromaFilterFunc VP8VFilter8i; +VP8ChromaFilterFunc VP8HFilter8i; +VP8SimpleFilterFunc VP8SimpleVFilter16; +VP8SimpleFilterFunc VP8SimpleHFilter16; +VP8SimpleFilterFunc VP8SimpleVFilter16i; +VP8SimpleFilterFunc VP8SimpleHFilter16i; + +extern void VP8DspInitSSE2(void); +extern void VP8DspInitNEON(void); + +void VP8DspInit(void) { + DspInitTables(); + + VP8Transform = TransformTwo; + VP8TransformUV = TransformUV; + VP8TransformDC = TransformDC; + VP8TransformDCUV = TransformDCUV; + + VP8VFilter16 = VFilter16; + VP8HFilter16 = HFilter16; + VP8VFilter8 = VFilter8; + VP8HFilter8 = HFilter8; + VP8VFilter16i = VFilter16i; + VP8HFilter16i = HFilter16i; + VP8VFilter8i = VFilter8i; + VP8HFilter8i = HFilter8i; + VP8SimpleVFilter16 = SimpleVFilter16; + VP8SimpleHFilter16 = SimpleHFilter16; + VP8SimpleVFilter16i = SimpleVFilter16i; + VP8SimpleHFilter16i = SimpleHFilter16i; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + VP8DspInitSSE2(); + } +#elif defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + VP8DspInitNEON(); + } +#endif + } +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dsp/dec_neon.c b/drivers/webpold/dsp/dec_neon.c new file mode 100644 index 0000000000..ec824b790b --- /dev/null +++ b/drivers/webpold/dsp/dec_neon.c @@ -0,0 +1,329 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// ARM NEON version of dsp functions and loop filtering. +// +// Authors: Somnath Banerjee (somnath@google.com) +// Johann Koenig (johannkoenig@google.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_NEON) + +#include "../dec/vp8i.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define QRegs "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", \ + "q8", "q9", "q10", "q11", "q12", "q13", "q14", "q15" + +#define FLIP_SIGN_BIT2(a, b, s) \ + "veor " #a "," #a "," #s " \n" \ + "veor " #b "," #b "," #s " \n" \ + +#define FLIP_SIGN_BIT4(a, b, c, d, s) \ + FLIP_SIGN_BIT2(a, b, s) \ + FLIP_SIGN_BIT2(c, d, s) \ + +#define NEEDS_FILTER(p1, p0, q0, q1, thresh, mask) \ + "vabd.u8 q15," #p0 "," #q0 " \n" /* abs(p0 - q0) */ \ + "vabd.u8 q14," #p1 "," #q1 " \n" /* abs(p1 - q1) */ \ + "vqadd.u8 q15, q15, q15 \n" /* abs(p0 - q0) * 2 */ \ + "vshr.u8 q14, q14, #1 \n" /* abs(p1 - q1) / 2 */ \ + "vqadd.u8 q15, q15, q14 \n" /* abs(p0 - q0) * 2 + abs(p1 - q1) / 2 */ \ + "vdup.8 q14, " #thresh " \n" \ + "vcge.u8 " #mask ", q14, q15 \n" /* mask <= thresh */ + +#define GET_BASE_DELTA(p1, p0, q0, q1, o) \ + "vqsub.s8 q15," #q0 "," #p0 " \n" /* (q0 - p0) */ \ + "vqsub.s8 " #o "," #p1 "," #q1 " \n" /* (p1 - q1) */ \ + "vqadd.s8 " #o "," #o ", q15 \n" /* (p1 - q1) + 1 * (p0 - q0) */ \ + "vqadd.s8 " #o "," #o ", q15 \n" /* (p1 - q1) + 2 * (p0 - q0) */ \ + "vqadd.s8 " #o "," #o ", q15 \n" /* (p1 - q1) + 3 * (p0 - q0) */ + +#define DO_SIMPLE_FILTER(p0, q0, fl) \ + "vmov.i8 q15, #0x03 \n" \ + "vqadd.s8 q15, q15, " #fl " \n" /* filter1 = filter + 3 */ \ + "vshr.s8 q15, q15, #3 \n" /* filter1 >> 3 */ \ + "vqadd.s8 " #p0 "," #p0 ", q15 \n" /* p0 += filter1 */ \ + \ + "vmov.i8 q15, #0x04 \n" \ + "vqadd.s8 q15, q15, " #fl " \n" /* filter1 = filter + 4 */ \ + "vshr.s8 q15, q15, #3 \n" /* filter2 >> 3 */ \ + "vqsub.s8 " #q0 "," #q0 ", q15 \n" /* q0 -= filter2 */ + +// Applies filter on 2 pixels (p0 and q0) +#define DO_FILTER2(p1, p0, q0, q1, thresh) \ + NEEDS_FILTER(p1, p0, q0, q1, thresh, q9) /* filter mask in q9 */ \ + "vmov.i8 q10, #0x80 \n" /* sign bit */ \ + FLIP_SIGN_BIT4(p1, p0, q0, q1, q10) /* convert to signed value */ \ + GET_BASE_DELTA(p1, p0, q0, q1, q11) /* get filter level */ \ + "vand q9, q9, q11 \n" /* apply filter mask */ \ + DO_SIMPLE_FILTER(p0, q0, q9) /* apply filter */ \ + FLIP_SIGN_BIT2(p0, q0, q10) + +// Load/Store vertical edge +#define LOAD8x4(c1, c2, c3, c4, b1, b2, stride) \ + "vld4.8 {" #c1"[0], " #c2"[0], " #c3"[0], " #c4"[0]}," #b1 "," #stride"\n" \ + "vld4.8 {" #c1"[1], " #c2"[1], " #c3"[1], " #c4"[1]}," #b2 "," #stride"\n" \ + "vld4.8 {" #c1"[2], " #c2"[2], " #c3"[2], " #c4"[2]}," #b1 "," #stride"\n" \ + "vld4.8 {" #c1"[3], " #c2"[3], " #c3"[3], " #c4"[3]}," #b2 "," #stride"\n" \ + "vld4.8 {" #c1"[4], " #c2"[4], " #c3"[4], " #c4"[4]}," #b1 "," #stride"\n" \ + "vld4.8 {" #c1"[5], " #c2"[5], " #c3"[5], " #c4"[5]}," #b2 "," #stride"\n" \ + "vld4.8 {" #c1"[6], " #c2"[6], " #c3"[6], " #c4"[6]}," #b1 "," #stride"\n" \ + "vld4.8 {" #c1"[7], " #c2"[7], " #c3"[7], " #c4"[7]}," #b2 "," #stride"\n" + +#define STORE8x2(c1, c2, p,stride) \ + "vst2.8 {" #c1"[0], " #c2"[0]}," #p "," #stride " \n" \ + "vst2.8 {" #c1"[1], " #c2"[1]}," #p "," #stride " \n" \ + "vst2.8 {" #c1"[2], " #c2"[2]}," #p "," #stride " \n" \ + "vst2.8 {" #c1"[3], " #c2"[3]}," #p "," #stride " \n" \ + "vst2.8 {" #c1"[4], " #c2"[4]}," #p "," #stride " \n" \ + "vst2.8 {" #c1"[5], " #c2"[5]}," #p "," #stride " \n" \ + "vst2.8 {" #c1"[6], " #c2"[6]}," #p "," #stride " \n" \ + "vst2.8 {" #c1"[7], " #c2"[7]}," #p "," #stride " \n" + +//----------------------------------------------------------------------------- +// Simple In-loop filtering (Paragraph 15.2) + +static void SimpleVFilter16NEON(uint8_t* p, int stride, int thresh) { + __asm__ volatile ( + "sub %[p], %[p], %[stride], lsl #1 \n" // p -= 2 * stride + + "vld1.u8 {q1}, [%[p]], %[stride] \n" // p1 + "vld1.u8 {q2}, [%[p]], %[stride] \n" // p0 + "vld1.u8 {q3}, [%[p]], %[stride] \n" // q0 + "vld1.u8 {q4}, [%[p]] \n" // q1 + + DO_FILTER2(q1, q2, q3, q4, %[thresh]) + + "sub %[p], %[p], %[stride], lsl #1 \n" // p -= 2 * stride + + "vst1.u8 {q2}, [%[p]], %[stride] \n" // store op0 + "vst1.u8 {q3}, [%[p]] \n" // store oq0 + : [p] "+r"(p) + : [stride] "r"(stride), [thresh] "r"(thresh) + : "memory", QRegs + ); +} + +static void SimpleHFilter16NEON(uint8_t* p, int stride, int thresh) { + __asm__ volatile ( + "sub r4, %[p], #2 \n" // base1 = p - 2 + "lsl r6, %[stride], #1 \n" // r6 = 2 * stride + "add r5, r4, %[stride] \n" // base2 = base1 + stride + + LOAD8x4(d2, d3, d4, d5, [r4], [r5], r6) + LOAD8x4(d6, d7, d8, d9, [r4], [r5], r6) + "vswp d3, d6 \n" // p1:q1 p0:q3 + "vswp d5, d8 \n" // q0:q2 q1:q4 + "vswp q2, q3 \n" // p1:q1 p0:q2 q0:q3 q1:q4 + + DO_FILTER2(q1, q2, q3, q4, %[thresh]) + + "sub %[p], %[p], #1 \n" // p - 1 + + "vswp d5, d6 \n" + STORE8x2(d4, d5, [%[p]], %[stride]) + STORE8x2(d6, d7, [%[p]], %[stride]) + + : [p] "+r"(p) + : [stride] "r"(stride), [thresh] "r"(thresh) + : "memory", "r4", "r5", "r6", QRegs + ); +} + +static void SimpleVFilter16iNEON(uint8_t* p, int stride, int thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4 * stride; + SimpleVFilter16NEON(p, stride, thresh); + } +} + +static void SimpleHFilter16iNEON(uint8_t* p, int stride, int thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4; + SimpleHFilter16NEON(p, stride, thresh); + } +} + +static void TransformOneNEON(const int16_t *in, uint8_t *dst) { + const int kBPS = BPS; + const int16_t constants[] = {20091, 17734, 0, 0}; + /* kC1, kC2. Padded because vld1.16 loads 8 bytes + * Technically these are unsigned but vqdmulh is only available in signed. + * vqdmulh returns high half (effectively >> 16) but also doubles the value, + * changing the >> 16 to >> 15 and requiring an additional >> 1. + * We use this to our advantage with kC2. The canonical value is 35468. + * However, the high bit is set so treating it as signed will give incorrect + * results. We avoid this by down shifting by 1 here to clear the highest bit. + * Combined with the doubling effect of vqdmulh we get >> 16. + * This can not be applied to kC1 because the lowest bit is set. Down shifting + * the constant would reduce precision. + */ + + /* libwebp uses a trick to avoid some extra addition that libvpx does. + * Instead of: + * temp2 = ip[12] + ((ip[12] * cospi8sqrt2minus1) >> 16); + * libwebp adds 1 << 16 to cospi8sqrt2minus1 (kC1). However, this causes the + * same issue with kC1 and vqdmulh that we work around by down shifting kC2 + */ + + /* Adapted from libvpx: vp8/common/arm/neon/shortidct4x4llm_neon.asm */ + __asm__ volatile ( + "vld1.16 {q1, q2}, [%[in]] \n" + "vld1.16 {d0}, [%[constants]] \n" + + /* d2: in[0] + * d3: in[8] + * d4: in[4] + * d5: in[12] + */ + "vswp d3, d4 \n" + + /* q8 = {in[4], in[12]} * kC1 * 2 >> 16 + * q9 = {in[4], in[12]} * kC2 >> 16 + */ + "vqdmulh.s16 q8, q2, d0[0] \n" + "vqdmulh.s16 q9, q2, d0[1] \n" + + /* d22 = a = in[0] + in[8] + * d23 = b = in[0] - in[8] + */ + "vqadd.s16 d22, d2, d3 \n" + "vqsub.s16 d23, d2, d3 \n" + + /* The multiplication should be x * kC1 >> 16 + * However, with vqdmulh we get x * kC1 * 2 >> 16 + * (multiply, double, return high half) + * We avoided this in kC2 by pre-shifting the constant. + * q8 = in[4]/[12] * kC1 >> 16 + */ + "vshr.s16 q8, q8, #1 \n" + + /* Add {in[4], in[12]} back after the multiplication. This is handled by + * adding 1 << 16 to kC1 in the libwebp C code. + */ + "vqadd.s16 q8, q2, q8 \n" + + /* d20 = c = in[4]*kC2 - in[12]*kC1 + * d21 = d = in[4]*kC1 + in[12]*kC2 + */ + "vqsub.s16 d20, d18, d17 \n" + "vqadd.s16 d21, d19, d16 \n" + + /* d2 = tmp[0] = a + d + * d3 = tmp[1] = b + c + * d4 = tmp[2] = b - c + * d5 = tmp[3] = a - d + */ + "vqadd.s16 d2, d22, d21 \n" + "vqadd.s16 d3, d23, d20 \n" + "vqsub.s16 d4, d23, d20 \n" + "vqsub.s16 d5, d22, d21 \n" + + "vzip.16 q1, q2 \n" + "vzip.16 q1, q2 \n" + + "vswp d3, d4 \n" + + /* q8 = {tmp[4], tmp[12]} * kC1 * 2 >> 16 + * q9 = {tmp[4], tmp[12]} * kC2 >> 16 + */ + "vqdmulh.s16 q8, q2, d0[0] \n" + "vqdmulh.s16 q9, q2, d0[1] \n" + + /* d22 = a = tmp[0] + tmp[8] + * d23 = b = tmp[0] - tmp[8] + */ + "vqadd.s16 d22, d2, d3 \n" + "vqsub.s16 d23, d2, d3 \n" + + /* See long winded explanations prior */ + "vshr.s16 q8, q8, #1 \n" + "vqadd.s16 q8, q2, q8 \n" + + /* d20 = c = in[4]*kC2 - in[12]*kC1 + * d21 = d = in[4]*kC1 + in[12]*kC2 + */ + "vqsub.s16 d20, d18, d17 \n" + "vqadd.s16 d21, d19, d16 \n" + + /* d2 = tmp[0] = a + d + * d3 = tmp[1] = b + c + * d4 = tmp[2] = b - c + * d5 = tmp[3] = a - d + */ + "vqadd.s16 d2, d22, d21 \n" + "vqadd.s16 d3, d23, d20 \n" + "vqsub.s16 d4, d23, d20 \n" + "vqsub.s16 d5, d22, d21 \n" + + "vld1.32 d6[0], [%[dst]], %[kBPS] \n" + "vld1.32 d6[1], [%[dst]], %[kBPS] \n" + "vld1.32 d7[0], [%[dst]], %[kBPS] \n" + "vld1.32 d7[1], [%[dst]], %[kBPS] \n" + + "sub %[dst], %[dst], %[kBPS], lsl #2 \n" + + /* (val) + 4 >> 3 */ + "vrshr.s16 d2, d2, #3 \n" + "vrshr.s16 d3, d3, #3 \n" + "vrshr.s16 d4, d4, #3 \n" + "vrshr.s16 d5, d5, #3 \n" + + "vzip.16 q1, q2 \n" + "vzip.16 q1, q2 \n" + + /* Must accumulate before saturating */ + "vmovl.u8 q8, d6 \n" + "vmovl.u8 q9, d7 \n" + + "vqadd.s16 q1, q1, q8 \n" + "vqadd.s16 q2, q2, q9 \n" + + "vqmovun.s16 d0, q1 \n" + "vqmovun.s16 d1, q2 \n" + + "vst1.32 d0[0], [%[dst]], %[kBPS] \n" + "vst1.32 d0[1], [%[dst]], %[kBPS] \n" + "vst1.32 d1[0], [%[dst]], %[kBPS] \n" + "vst1.32 d1[1], [%[dst]] \n" + + : [in] "+r"(in), [dst] "+r"(dst) /* modified registers */ + : [kBPS] "r"(kBPS), [constants] "r"(constants) /* constants */ + : "memory", "q0", "q1", "q2", "q8", "q9", "q10", "q11" /* clobbered */ + ); +} + +static void TransformTwoNEON(const int16_t* in, uint8_t* dst, int do_two) { + TransformOneNEON(in, dst); + if (do_two) { + TransformOneNEON(in + 16, dst + 4); + } +} + +extern void VP8DspInitNEON(void); + +void VP8DspInitNEON(void) { + VP8Transform = TransformTwoNEON; + + VP8SimpleVFilter16 = SimpleVFilter16NEON; + VP8SimpleHFilter16 = SimpleHFilter16NEON; + VP8SimpleVFilter16i = SimpleVFilter16iNEON; + VP8SimpleHFilter16i = SimpleHFilter16iNEON; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif // WEBP_USE_NEON diff --git a/drivers/webpold/dsp/dec_sse2.c b/drivers/webpold/dsp/dec_sse2.c new file mode 100644 index 0000000000..472b68ecb8 --- /dev/null +++ b/drivers/webpold/dsp/dec_sse2.c @@ -0,0 +1,903 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// SSE2 version of some decoding functions (idct, loop filtering). +// +// Author: somnath@google.com (Somnath Banerjee) +// cduvivier@google.com (Christian Duvivier) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) + +#include <emmintrin.h> +#include "../dec/vp8i.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Transforms (Paragraph 14.4) + +static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { + // This implementation makes use of 16-bit fixed point versions of two + // multiply constants: + // K1 = sqrt(2) * cos (pi/8) ~= 85627 / 2^16 + // K2 = sqrt(2) * sin (pi/8) ~= 35468 / 2^16 + // + // To be able to use signed 16-bit integers, we use the following trick to + // have constants within range: + // - Associated constants are obtained by subtracting the 16-bit fixed point + // version of one: + // k = K - (1 << 16) => K = k + (1 << 16) + // K1 = 85267 => k1 = 20091 + // K2 = 35468 => k2 = -30068 + // - The multiplication of a variable by a constant become the sum of the + // variable and the multiplication of that variable by the associated + // constant: + // (x * K) >> 16 = (x * (k + (1 << 16))) >> 16 = ((x * k ) >> 16) + x + const __m128i k1 = _mm_set1_epi16(20091); + const __m128i k2 = _mm_set1_epi16(-30068); + __m128i T0, T1, T2, T3; + + // Load and concatenate the transform coefficients (we'll do two transforms + // in parallel). In the case of only one transform, the second half of the + // vectors will just contain random value we'll never use nor store. + __m128i in0, in1, in2, in3; + { + in0 = _mm_loadl_epi64((__m128i*)&in[0]); + in1 = _mm_loadl_epi64((__m128i*)&in[4]); + in2 = _mm_loadl_epi64((__m128i*)&in[8]); + in3 = _mm_loadl_epi64((__m128i*)&in[12]); + // a00 a10 a20 a30 x x x x + // a01 a11 a21 a31 x x x x + // a02 a12 a22 a32 x x x x + // a03 a13 a23 a33 x x x x + if (do_two) { + const __m128i inB0 = _mm_loadl_epi64((__m128i*)&in[16]); + const __m128i inB1 = _mm_loadl_epi64((__m128i*)&in[20]); + const __m128i inB2 = _mm_loadl_epi64((__m128i*)&in[24]); + const __m128i inB3 = _mm_loadl_epi64((__m128i*)&in[28]); + in0 = _mm_unpacklo_epi64(in0, inB0); + in1 = _mm_unpacklo_epi64(in1, inB1); + in2 = _mm_unpacklo_epi64(in2, inB2); + in3 = _mm_unpacklo_epi64(in3, inB3); + // a00 a10 a20 a30 b00 b10 b20 b30 + // a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 + // a03 a13 a23 a33 b03 b13 b23 b33 + } + } + + // Vertical pass and subsequent transpose. + { + // First pass, c and d calculations are longer because of the "trick" + // multiplications. + const __m128i a = _mm_add_epi16(in0, in2); + const __m128i b = _mm_sub_epi16(in0, in2); + // c = MUL(in1, K2) - MUL(in3, K1) = MUL(in1, k2) - MUL(in3, k1) + in1 - in3 + const __m128i c1 = _mm_mulhi_epi16(in1, k2); + const __m128i c2 = _mm_mulhi_epi16(in3, k1); + const __m128i c3 = _mm_sub_epi16(in1, in3); + const __m128i c4 = _mm_sub_epi16(c1, c2); + const __m128i c = _mm_add_epi16(c3, c4); + // d = MUL(in1, K1) + MUL(in3, K2) = MUL(in1, k1) + MUL(in3, k2) + in1 + in3 + const __m128i d1 = _mm_mulhi_epi16(in1, k1); + const __m128i d2 = _mm_mulhi_epi16(in3, k2); + const __m128i d3 = _mm_add_epi16(in1, in3); + const __m128i d4 = _mm_add_epi16(d1, d2); + const __m128i d = _mm_add_epi16(d3, d4); + + // Second pass. + const __m128i tmp0 = _mm_add_epi16(a, d); + const __m128i tmp1 = _mm_add_epi16(b, c); + const __m128i tmp2 = _mm_sub_epi16(b, c); + const __m128i tmp3 = _mm_sub_epi16(a, d); + + // Transpose the two 4x4. + // a00 a01 a02 a03 b00 b01 b02 b03 + // a10 a11 a12 a13 b10 b11 b12 b13 + // a20 a21 a22 a23 b20 b21 b22 b23 + // a30 a31 a32 a33 b30 b31 b32 b33 + const __m128i transpose0_0 = _mm_unpacklo_epi16(tmp0, tmp1); + const __m128i transpose0_1 = _mm_unpacklo_epi16(tmp2, tmp3); + const __m128i transpose0_2 = _mm_unpackhi_epi16(tmp0, tmp1); + const __m128i transpose0_3 = _mm_unpackhi_epi16(tmp2, tmp3); + // a00 a10 a01 a11 a02 a12 a03 a13 + // a20 a30 a21 a31 a22 a32 a23 a33 + // b00 b10 b01 b11 b02 b12 b03 b13 + // b20 b30 b21 b31 b22 b32 b23 b33 + const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3); + const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3); + // a00 a10 a20 a30 a01 a11 a21 a31 + // b00 b10 b20 b30 b01 b11 b21 b31 + // a02 a12 a22 a32 a03 a13 a23 a33 + // b02 b12 a22 b32 b03 b13 b23 b33 + T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); + T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); + T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); + T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3); + // a00 a10 a20 a30 b00 b10 b20 b30 + // a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 + // a03 a13 a23 a33 b03 b13 b23 b33 + } + + // Horizontal pass and subsequent transpose. + { + // First pass, c and d calculations are longer because of the "trick" + // multiplications. + const __m128i four = _mm_set1_epi16(4); + const __m128i dc = _mm_add_epi16(T0, four); + const __m128i a = _mm_add_epi16(dc, T2); + const __m128i b = _mm_sub_epi16(dc, T2); + // c = MUL(T1, K2) - MUL(T3, K1) = MUL(T1, k2) - MUL(T3, k1) + T1 - T3 + const __m128i c1 = _mm_mulhi_epi16(T1, k2); + const __m128i c2 = _mm_mulhi_epi16(T3, k1); + const __m128i c3 = _mm_sub_epi16(T1, T3); + const __m128i c4 = _mm_sub_epi16(c1, c2); + const __m128i c = _mm_add_epi16(c3, c4); + // d = MUL(T1, K1) + MUL(T3, K2) = MUL(T1, k1) + MUL(T3, k2) + T1 + T3 + const __m128i d1 = _mm_mulhi_epi16(T1, k1); + const __m128i d2 = _mm_mulhi_epi16(T3, k2); + const __m128i d3 = _mm_add_epi16(T1, T3); + const __m128i d4 = _mm_add_epi16(d1, d2); + const __m128i d = _mm_add_epi16(d3, d4); + + // Second pass. + const __m128i tmp0 = _mm_add_epi16(a, d); + const __m128i tmp1 = _mm_add_epi16(b, c); + const __m128i tmp2 = _mm_sub_epi16(b, c); + const __m128i tmp3 = _mm_sub_epi16(a, d); + const __m128i shifted0 = _mm_srai_epi16(tmp0, 3); + const __m128i shifted1 = _mm_srai_epi16(tmp1, 3); + const __m128i shifted2 = _mm_srai_epi16(tmp2, 3); + const __m128i shifted3 = _mm_srai_epi16(tmp3, 3); + + // Transpose the two 4x4. + // a00 a01 a02 a03 b00 b01 b02 b03 + // a10 a11 a12 a13 b10 b11 b12 b13 + // a20 a21 a22 a23 b20 b21 b22 b23 + // a30 a31 a32 a33 b30 b31 b32 b33 + const __m128i transpose0_0 = _mm_unpacklo_epi16(shifted0, shifted1); + const __m128i transpose0_1 = _mm_unpacklo_epi16(shifted2, shifted3); + const __m128i transpose0_2 = _mm_unpackhi_epi16(shifted0, shifted1); + const __m128i transpose0_3 = _mm_unpackhi_epi16(shifted2, shifted3); + // a00 a10 a01 a11 a02 a12 a03 a13 + // a20 a30 a21 a31 a22 a32 a23 a33 + // b00 b10 b01 b11 b02 b12 b03 b13 + // b20 b30 b21 b31 b22 b32 b23 b33 + const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3); + const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3); + // a00 a10 a20 a30 a01 a11 a21 a31 + // b00 b10 b20 b30 b01 b11 b21 b31 + // a02 a12 a22 a32 a03 a13 a23 a33 + // b02 b12 a22 b32 b03 b13 b23 b33 + T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); + T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); + T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); + T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3); + // a00 a10 a20 a30 b00 b10 b20 b30 + // a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 + // a03 a13 a23 a33 b03 b13 b23 b33 + } + + // Add inverse transform to 'dst' and store. + { + const __m128i zero = _mm_set1_epi16(0); + // Load the reference(s). + __m128i dst0, dst1, dst2, dst3; + if (do_two) { + // Load eight bytes/pixels per line. + dst0 = _mm_loadl_epi64((__m128i*)&dst[0 * BPS]); + dst1 = _mm_loadl_epi64((__m128i*)&dst[1 * BPS]); + dst2 = _mm_loadl_epi64((__m128i*)&dst[2 * BPS]); + dst3 = _mm_loadl_epi64((__m128i*)&dst[3 * BPS]); + } else { + // Load four bytes/pixels per line. + dst0 = _mm_cvtsi32_si128(*(int*)&dst[0 * BPS]); + dst1 = _mm_cvtsi32_si128(*(int*)&dst[1 * BPS]); + dst2 = _mm_cvtsi32_si128(*(int*)&dst[2 * BPS]); + dst3 = _mm_cvtsi32_si128(*(int*)&dst[3 * BPS]); + } + // Convert to 16b. + dst0 = _mm_unpacklo_epi8(dst0, zero); + dst1 = _mm_unpacklo_epi8(dst1, zero); + dst2 = _mm_unpacklo_epi8(dst2, zero); + dst3 = _mm_unpacklo_epi8(dst3, zero); + // Add the inverse transform(s). + dst0 = _mm_add_epi16(dst0, T0); + dst1 = _mm_add_epi16(dst1, T1); + dst2 = _mm_add_epi16(dst2, T2); + dst3 = _mm_add_epi16(dst3, T3); + // Unsigned saturate to 8b. + dst0 = _mm_packus_epi16(dst0, dst0); + dst1 = _mm_packus_epi16(dst1, dst1); + dst2 = _mm_packus_epi16(dst2, dst2); + dst3 = _mm_packus_epi16(dst3, dst3); + // Store the results. + if (do_two) { + // Store eight bytes/pixels per line. + _mm_storel_epi64((__m128i*)&dst[0 * BPS], dst0); + _mm_storel_epi64((__m128i*)&dst[1 * BPS], dst1); + _mm_storel_epi64((__m128i*)&dst[2 * BPS], dst2); + _mm_storel_epi64((__m128i*)&dst[3 * BPS], dst3); + } else { + // Store four bytes/pixels per line. + *((int32_t *)&dst[0 * BPS]) = _mm_cvtsi128_si32(dst0); + *((int32_t *)&dst[1 * BPS]) = _mm_cvtsi128_si32(dst1); + *((int32_t *)&dst[2 * BPS]) = _mm_cvtsi128_si32(dst2); + *((int32_t *)&dst[3 * BPS]) = _mm_cvtsi128_si32(dst3); + } + } +} + +//------------------------------------------------------------------------------ +// Loop Filter (Paragraph 15) + +// Compute abs(p - q) = subs(p - q) OR subs(q - p) +#define MM_ABS(p, q) _mm_or_si128( \ + _mm_subs_epu8((q), (p)), \ + _mm_subs_epu8((p), (q))) + +// Shift each byte of "a" by N bits while preserving by the sign bit. +// +// It first shifts the lower bytes of the words and then the upper bytes and +// then merges the results together. +#define SIGNED_SHIFT_N(a, N) { \ + __m128i t = a; \ + t = _mm_slli_epi16(t, 8); \ + t = _mm_srai_epi16(t, N); \ + t = _mm_srli_epi16(t, 8); \ + \ + a = _mm_srai_epi16(a, N + 8); \ + a = _mm_slli_epi16(a, 8); \ + \ + a = _mm_or_si128(t, a); \ +} + +#define FLIP_SIGN_BIT2(a, b) { \ + a = _mm_xor_si128(a, sign_bit); \ + b = _mm_xor_si128(b, sign_bit); \ +} + +#define FLIP_SIGN_BIT4(a, b, c, d) { \ + FLIP_SIGN_BIT2(a, b); \ + FLIP_SIGN_BIT2(c, d); \ +} + +#define GET_NOTHEV(p1, p0, q0, q1, hev_thresh, not_hev) { \ + const __m128i zero = _mm_setzero_si128(); \ + const __m128i t1 = MM_ABS(p1, p0); \ + const __m128i t2 = MM_ABS(q1, q0); \ + \ + const __m128i h = _mm_set1_epi8(hev_thresh); \ + const __m128i t3 = _mm_subs_epu8(t1, h); /* abs(p1 - p0) - hev_tresh */ \ + const __m128i t4 = _mm_subs_epu8(t2, h); /* abs(q1 - q0) - hev_tresh */ \ + \ + not_hev = _mm_or_si128(t3, t4); \ + not_hev = _mm_cmpeq_epi8(not_hev, zero); /* not_hev <= t1 && not_hev <= t2 */\ +} + +#define GET_BASE_DELTA(p1, p0, q0, q1, o) { \ + const __m128i qp0 = _mm_subs_epi8(q0, p0); /* q0 - p0 */ \ + o = _mm_subs_epi8(p1, q1); /* p1 - q1 */ \ + o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 1 * (q0 - p0) */ \ + o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 2 * (q0 - p0) */ \ + o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 3 * (q0 - p0) */ \ +} + +#define DO_SIMPLE_FILTER(p0, q0, fl) { \ + const __m128i three = _mm_set1_epi8(3); \ + const __m128i four = _mm_set1_epi8(4); \ + __m128i v3 = _mm_adds_epi8(fl, three); \ + __m128i v4 = _mm_adds_epi8(fl, four); \ + \ + /* Do +4 side */ \ + SIGNED_SHIFT_N(v4, 3); /* v4 >> 3 */ \ + q0 = _mm_subs_epi8(q0, v4); /* q0 -= v4 */ \ + \ + /* Now do +3 side */ \ + SIGNED_SHIFT_N(v3, 3); /* v3 >> 3 */ \ + p0 = _mm_adds_epi8(p0, v3); /* p0 += v3 */ \ +} + +// Updates values of 2 pixels at MB edge during complex filtering. +// Update operations: +// q = q - a and p = p + a; where a = [(a_hi >> 7), (a_lo >> 7)] +#define UPDATE_2PIXELS(pi, qi, a_lo, a_hi) { \ + const __m128i a_lo7 = _mm_srai_epi16(a_lo, 7); \ + const __m128i a_hi7 = _mm_srai_epi16(a_hi, 7); \ + const __m128i a = _mm_packs_epi16(a_lo7, a_hi7); \ + pi = _mm_adds_epi8(pi, a); \ + qi = _mm_subs_epi8(qi, a); \ +} + +static void NeedsFilter(const __m128i* p1, const __m128i* p0, const __m128i* q0, + const __m128i* q1, int thresh, __m128i *mask) { + __m128i t1 = MM_ABS(*p1, *q1); // abs(p1 - q1) + *mask = _mm_set1_epi8(0xFE); + t1 = _mm_and_si128(t1, *mask); // set lsb of each byte to zero + t1 = _mm_srli_epi16(t1, 1); // abs(p1 - q1) / 2 + + *mask = MM_ABS(*p0, *q0); // abs(p0 - q0) + *mask = _mm_adds_epu8(*mask, *mask); // abs(p0 - q0) * 2 + *mask = _mm_adds_epu8(*mask, t1); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2 + + t1 = _mm_set1_epi8(thresh); + *mask = _mm_subs_epu8(*mask, t1); // mask <= thresh + *mask = _mm_cmpeq_epi8(*mask, _mm_setzero_si128()); +} + +//------------------------------------------------------------------------------ +// Edge filtering functions + +// Applies filter on 2 pixels (p0 and q0) +static WEBP_INLINE void DoFilter2(const __m128i* p1, __m128i* p0, __m128i* q0, + const __m128i* q1, int thresh) { + __m128i a, mask; + const __m128i sign_bit = _mm_set1_epi8(0x80); + const __m128i p1s = _mm_xor_si128(*p1, sign_bit); + const __m128i q1s = _mm_xor_si128(*q1, sign_bit); + + NeedsFilter(p1, p0, q0, q1, thresh, &mask); + + // convert to signed values + FLIP_SIGN_BIT2(*p0, *q0); + + GET_BASE_DELTA(p1s, *p0, *q0, q1s, a); + a = _mm_and_si128(a, mask); // mask filter values we don't care about + DO_SIMPLE_FILTER(*p0, *q0, a); + + // unoffset + FLIP_SIGN_BIT2(*p0, *q0); +} + +// Applies filter on 4 pixels (p1, p0, q0 and q1) +static WEBP_INLINE void DoFilter4(__m128i* p1, __m128i *p0, + __m128i* q0, __m128i* q1, + const __m128i* mask, int hev_thresh) { + __m128i not_hev; + __m128i t1, t2, t3; + const __m128i sign_bit = _mm_set1_epi8(0x80); + + // compute hev mask + GET_NOTHEV(*p1, *p0, *q0, *q1, hev_thresh, not_hev); + + // convert to signed values + FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); + + t1 = _mm_subs_epi8(*p1, *q1); // p1 - q1 + t1 = _mm_andnot_si128(not_hev, t1); // hev(p1 - q1) + t2 = _mm_subs_epi8(*q0, *p0); // q0 - p0 + t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 1 * (q0 - p0) + t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 2 * (q0 - p0) + t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 3 * (q0 - p0) + t1 = _mm_and_si128(t1, *mask); // mask filter values we don't care about + + // Do +4 side + t2 = _mm_set1_epi8(4); + t2 = _mm_adds_epi8(t1, t2); // 3 * (q0 - p0) + (p1 - q1) + 4 + SIGNED_SHIFT_N(t2, 3); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 3 + t3 = t2; // save t2 + *q0 = _mm_subs_epi8(*q0, t2); // q0 -= t2 + + // Now do +3 side + t2 = _mm_set1_epi8(3); + t2 = _mm_adds_epi8(t1, t2); // +3 instead of +4 + SIGNED_SHIFT_N(t2, 3); // (3 * (q0 - p0) + hev(p1 - q1) + 3) >> 3 + *p0 = _mm_adds_epi8(*p0, t2); // p0 += t2 + + t2 = _mm_set1_epi8(1); + t3 = _mm_adds_epi8(t3, t2); + SIGNED_SHIFT_N(t3, 1); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 4 + + t3 = _mm_and_si128(not_hev, t3); // if !hev + *q1 = _mm_subs_epi8(*q1, t3); // q1 -= t3 + *p1 = _mm_adds_epi8(*p1, t3); // p1 += t3 + + // unoffset + FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); +} + +// Applies filter on 6 pixels (p2, p1, p0, q0, q1 and q2) +static WEBP_INLINE void DoFilter6(__m128i *p2, __m128i* p1, __m128i *p0, + __m128i* q0, __m128i* q1, __m128i *q2, + const __m128i* mask, int hev_thresh) { + __m128i a, not_hev; + const __m128i sign_bit = _mm_set1_epi8(0x80); + + // compute hev mask + GET_NOTHEV(*p1, *p0, *q0, *q1, hev_thresh, not_hev); + + // convert to signed values + FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); + FLIP_SIGN_BIT2(*p2, *q2); + + GET_BASE_DELTA(*p1, *p0, *q0, *q1, a); + + { // do simple filter on pixels with hev + const __m128i m = _mm_andnot_si128(not_hev, *mask); + const __m128i f = _mm_and_si128(a, m); + DO_SIMPLE_FILTER(*p0, *q0, f); + } + { // do strong filter on pixels with not hev + const __m128i zero = _mm_setzero_si128(); + const __m128i nine = _mm_set1_epi16(0x0900); + const __m128i sixty_three = _mm_set1_epi16(63); + + const __m128i m = _mm_and_si128(not_hev, *mask); + const __m128i f = _mm_and_si128(a, m); + const __m128i f_lo = _mm_unpacklo_epi8(zero, f); + const __m128i f_hi = _mm_unpackhi_epi8(zero, f); + + const __m128i f9_lo = _mm_mulhi_epi16(f_lo, nine); // Filter (lo) * 9 + const __m128i f9_hi = _mm_mulhi_epi16(f_hi, nine); // Filter (hi) * 9 + const __m128i f18_lo = _mm_add_epi16(f9_lo, f9_lo); // Filter (lo) * 18 + const __m128i f18_hi = _mm_add_epi16(f9_hi, f9_hi); // Filter (hi) * 18 + + const __m128i a2_lo = _mm_add_epi16(f9_lo, sixty_three); // Filter * 9 + 63 + const __m128i a2_hi = _mm_add_epi16(f9_hi, sixty_three); // Filter * 9 + 63 + + const __m128i a1_lo = _mm_add_epi16(f18_lo, sixty_three); // F... * 18 + 63 + const __m128i a1_hi = _mm_add_epi16(f18_hi, sixty_three); // F... * 18 + 63 + + const __m128i a0_lo = _mm_add_epi16(f18_lo, a2_lo); // Filter * 27 + 63 + const __m128i a0_hi = _mm_add_epi16(f18_hi, a2_hi); // Filter * 27 + 63 + + UPDATE_2PIXELS(*p2, *q2, a2_lo, a2_hi); + UPDATE_2PIXELS(*p1, *q1, a1_lo, a1_hi); + UPDATE_2PIXELS(*p0, *q0, a0_lo, a0_hi); + } + + // unoffset + FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); + FLIP_SIGN_BIT2(*p2, *q2); +} + +// reads 8 rows across a vertical edge. +// +// TODO(somnath): Investigate _mm_shuffle* also see if it can be broken into +// two Load4x4() to avoid code duplication. +static WEBP_INLINE void Load8x4(const uint8_t* b, int stride, + __m128i* p, __m128i* q) { + __m128i t1, t2; + + // Load 0th, 1st, 4th and 5th rows + __m128i r0 = _mm_cvtsi32_si128(*((int*)&b[0 * stride])); // 03 02 01 00 + __m128i r1 = _mm_cvtsi32_si128(*((int*)&b[1 * stride])); // 13 12 11 10 + __m128i r4 = _mm_cvtsi32_si128(*((int*)&b[4 * stride])); // 43 42 41 40 + __m128i r5 = _mm_cvtsi32_si128(*((int*)&b[5 * stride])); // 53 52 51 50 + + r0 = _mm_unpacklo_epi32(r0, r4); // 43 42 41 40 03 02 01 00 + r1 = _mm_unpacklo_epi32(r1, r5); // 53 52 51 50 13 12 11 10 + + // t1 = 53 43 52 42 51 41 50 40 13 03 12 02 11 01 10 00 + t1 = _mm_unpacklo_epi8(r0, r1); + + // Load 2nd, 3rd, 6th and 7th rows + r0 = _mm_cvtsi32_si128(*((int*)&b[2 * stride])); // 23 22 21 22 + r1 = _mm_cvtsi32_si128(*((int*)&b[3 * stride])); // 33 32 31 30 + r4 = _mm_cvtsi32_si128(*((int*)&b[6 * stride])); // 63 62 61 60 + r5 = _mm_cvtsi32_si128(*((int*)&b[7 * stride])); // 73 72 71 70 + + r0 = _mm_unpacklo_epi32(r0, r4); // 63 62 61 60 23 22 21 20 + r1 = _mm_unpacklo_epi32(r1, r5); // 73 72 71 70 33 32 31 30 + + // t2 = 73 63 72 62 71 61 70 60 33 23 32 22 31 21 30 20 + t2 = _mm_unpacklo_epi8(r0, r1); + + // t1 = 33 23 13 03 32 22 12 02 31 21 11 01 30 20 10 00 + // t2 = 73 63 53 43 72 62 52 42 71 61 51 41 70 60 50 40 + r0 = t1; + t1 = _mm_unpacklo_epi16(t1, t2); + t2 = _mm_unpackhi_epi16(r0, t2); + + // *p = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00 + // *q = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02 + *p = _mm_unpacklo_epi32(t1, t2); + *q = _mm_unpackhi_epi32(t1, t2); +} + +static WEBP_INLINE void Load16x4(const uint8_t* r0, const uint8_t* r8, + int stride, + __m128i* p1, __m128i* p0, + __m128i* q0, __m128i* q1) { + __m128i t1, t2; + // Assume the pixels around the edge (|) are numbered as follows + // 00 01 | 02 03 + // 10 11 | 12 13 + // ... | ... + // e0 e1 | e2 e3 + // f0 f1 | f2 f3 + // + // r0 is pointing to the 0th row (00) + // r8 is pointing to the 8th row (80) + + // Load + // p1 = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00 + // q0 = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02 + // p0 = f1 e1 d1 c1 b1 a1 91 81 f0 e0 d0 c0 b0 a0 90 80 + // q1 = f3 e3 d3 c3 b3 a3 93 83 f2 e2 d2 c2 b2 a2 92 82 + Load8x4(r0, stride, p1, q0); + Load8x4(r8, stride, p0, q1); + + t1 = *p1; + t2 = *q0; + // p1 = f0 e0 d0 c0 b0 a0 90 80 70 60 50 40 30 20 10 00 + // p0 = f1 e1 d1 c1 b1 a1 91 81 71 61 51 41 31 21 11 01 + // q0 = f2 e2 d2 c2 b2 a2 92 82 72 62 52 42 32 22 12 02 + // q1 = f3 e3 d3 c3 b3 a3 93 83 73 63 53 43 33 23 13 03 + *p1 = _mm_unpacklo_epi64(t1, *p0); + *p0 = _mm_unpackhi_epi64(t1, *p0); + *q0 = _mm_unpacklo_epi64(t2, *q1); + *q1 = _mm_unpackhi_epi64(t2, *q1); +} + +static WEBP_INLINE void Store4x4(__m128i* x, uint8_t* dst, int stride) { + int i; + for (i = 0; i < 4; ++i, dst += stride) { + *((int32_t*)dst) = _mm_cvtsi128_si32(*x); + *x = _mm_srli_si128(*x, 4); + } +} + +// Transpose back and store +static WEBP_INLINE void Store16x4(uint8_t* r0, uint8_t* r8, int stride, + __m128i* p1, __m128i* p0, + __m128i* q0, __m128i* q1) { + __m128i t1; + + // p0 = 71 70 61 60 51 50 41 40 31 30 21 20 11 10 01 00 + // p1 = f1 f0 e1 e0 d1 d0 c1 c0 b1 b0 a1 a0 91 90 81 80 + t1 = *p0; + *p0 = _mm_unpacklo_epi8(*p1, t1); + *p1 = _mm_unpackhi_epi8(*p1, t1); + + // q0 = 73 72 63 62 53 52 43 42 33 32 23 22 13 12 03 02 + // q1 = f3 f2 e3 e2 d3 d2 c3 c2 b3 b2 a3 a2 93 92 83 82 + t1 = *q0; + *q0 = _mm_unpacklo_epi8(t1, *q1); + *q1 = _mm_unpackhi_epi8(t1, *q1); + + // p0 = 33 32 31 30 23 22 21 20 13 12 11 10 03 02 01 00 + // q0 = 73 72 71 70 63 62 61 60 53 52 51 50 43 42 41 40 + t1 = *p0; + *p0 = _mm_unpacklo_epi16(t1, *q0); + *q0 = _mm_unpackhi_epi16(t1, *q0); + + // p1 = b3 b2 b1 b0 a3 a2 a1 a0 93 92 91 90 83 82 81 80 + // q1 = f3 f2 f1 f0 e3 e2 e1 e0 d3 d2 d1 d0 c3 c2 c1 c0 + t1 = *p1; + *p1 = _mm_unpacklo_epi16(t1, *q1); + *q1 = _mm_unpackhi_epi16(t1, *q1); + + Store4x4(p0, r0, stride); + r0 += 4 * stride; + Store4x4(q0, r0, stride); + + Store4x4(p1, r8, stride); + r8 += 4 * stride; + Store4x4(q1, r8, stride); +} + +//------------------------------------------------------------------------------ +// Simple In-loop filtering (Paragraph 15.2) + +static void SimpleVFilter16SSE2(uint8_t* p, int stride, int thresh) { + // Load + __m128i p1 = _mm_loadu_si128((__m128i*)&p[-2 * stride]); + __m128i p0 = _mm_loadu_si128((__m128i*)&p[-stride]); + __m128i q0 = _mm_loadu_si128((__m128i*)&p[0]); + __m128i q1 = _mm_loadu_si128((__m128i*)&p[stride]); + + DoFilter2(&p1, &p0, &q0, &q1, thresh); + + // Store + _mm_storeu_si128((__m128i*)&p[-stride], p0); + _mm_storeu_si128((__m128i*)p, q0); +} + +static void SimpleHFilter16SSE2(uint8_t* p, int stride, int thresh) { + __m128i p1, p0, q0, q1; + + p -= 2; // beginning of p1 + + Load16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1); + DoFilter2(&p1, &p0, &q0, &q1, thresh); + Store16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1); +} + +static void SimpleVFilter16iSSE2(uint8_t* p, int stride, int thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4 * stride; + SimpleVFilter16SSE2(p, stride, thresh); + } +} + +static void SimpleHFilter16iSSE2(uint8_t* p, int stride, int thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4; + SimpleHFilter16SSE2(p, stride, thresh); + } +} + +//------------------------------------------------------------------------------ +// Complex In-loop filtering (Paragraph 15.3) + +#define MAX_DIFF1(p3, p2, p1, p0, m) { \ + m = MM_ABS(p3, p2); \ + m = _mm_max_epu8(m, MM_ABS(p2, p1)); \ + m = _mm_max_epu8(m, MM_ABS(p1, p0)); \ +} + +#define MAX_DIFF2(p3, p2, p1, p0, m) { \ + m = _mm_max_epu8(m, MM_ABS(p3, p2)); \ + m = _mm_max_epu8(m, MM_ABS(p2, p1)); \ + m = _mm_max_epu8(m, MM_ABS(p1, p0)); \ +} + +#define LOAD_H_EDGES4(p, stride, e1, e2, e3, e4) { \ + e1 = _mm_loadu_si128((__m128i*)&(p)[0 * stride]); \ + e2 = _mm_loadu_si128((__m128i*)&(p)[1 * stride]); \ + e3 = _mm_loadu_si128((__m128i*)&(p)[2 * stride]); \ + e4 = _mm_loadu_si128((__m128i*)&(p)[3 * stride]); \ +} + +#define LOADUV_H_EDGE(p, u, v, stride) { \ + p = _mm_loadl_epi64((__m128i*)&(u)[(stride)]); \ + p = _mm_unpacklo_epi64(p, _mm_loadl_epi64((__m128i*)&(v)[(stride)])); \ +} + +#define LOADUV_H_EDGES4(u, v, stride, e1, e2, e3, e4) { \ + LOADUV_H_EDGE(e1, u, v, 0 * stride); \ + LOADUV_H_EDGE(e2, u, v, 1 * stride); \ + LOADUV_H_EDGE(e3, u, v, 2 * stride); \ + LOADUV_H_EDGE(e4, u, v, 3 * stride); \ +} + +#define STOREUV(p, u, v, stride) { \ + _mm_storel_epi64((__m128i*)&u[(stride)], p); \ + p = _mm_srli_si128(p, 8); \ + _mm_storel_epi64((__m128i*)&v[(stride)], p); \ +} + +#define COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask) { \ + __m128i fl_yes; \ + const __m128i it = _mm_set1_epi8(ithresh); \ + mask = _mm_subs_epu8(mask, it); \ + mask = _mm_cmpeq_epi8(mask, _mm_setzero_si128()); \ + NeedsFilter(&p1, &p0, &q0, &q1, thresh, &fl_yes); \ + mask = _mm_and_si128(mask, fl_yes); \ +} + +// on macroblock edges +static void VFilter16SSE2(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + __m128i t1; + __m128i mask; + __m128i p2, p1, p0, q0, q1, q2; + + // Load p3, p2, p1, p0 + LOAD_H_EDGES4(p - 4 * stride, stride, t1, p2, p1, p0); + MAX_DIFF1(t1, p2, p1, p0, mask); + + // Load q0, q1, q2, q3 + LOAD_H_EDGES4(p, stride, q0, q1, q2, t1); + MAX_DIFF2(t1, q2, q1, q0, mask); + + COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); + + // Store + _mm_storeu_si128((__m128i*)&p[-3 * stride], p2); + _mm_storeu_si128((__m128i*)&p[-2 * stride], p1); + _mm_storeu_si128((__m128i*)&p[-1 * stride], p0); + _mm_storeu_si128((__m128i*)&p[0 * stride], q0); + _mm_storeu_si128((__m128i*)&p[1 * stride], q1); + _mm_storeu_si128((__m128i*)&p[2 * stride], q2); +} + +static void HFilter16SSE2(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + __m128i mask; + __m128i p3, p2, p1, p0, q0, q1, q2, q3; + + uint8_t* const b = p - 4; + Load16x4(b, b + 8 * stride, stride, &p3, &p2, &p1, &p0); // p3, p2, p1, p0 + MAX_DIFF1(p3, p2, p1, p0, mask); + + Load16x4(p, p + 8 * stride, stride, &q0, &q1, &q2, &q3); // q0, q1, q2, q3 + MAX_DIFF2(q3, q2, q1, q0, mask); + + COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); + + Store16x4(b, b + 8 * stride, stride, &p3, &p2, &p1, &p0); + Store16x4(p, p + 8 * stride, stride, &q0, &q1, &q2, &q3); +} + +// on three inner edges +static void VFilter16iSSE2(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + int k; + __m128i mask; + __m128i t1, t2, p1, p0, q0, q1; + + for (k = 3; k > 0; --k) { + // Load p3, p2, p1, p0 + LOAD_H_EDGES4(p, stride, t2, t1, p1, p0); + MAX_DIFF1(t2, t1, p1, p0, mask); + + p += 4 * stride; + + // Load q0, q1, q2, q3 + LOAD_H_EDGES4(p, stride, q0, q1, t1, t2); + MAX_DIFF2(t2, t1, q1, q0, mask); + + COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); + + // Store + _mm_storeu_si128((__m128i*)&p[-2 * stride], p1); + _mm_storeu_si128((__m128i*)&p[-1 * stride], p0); + _mm_storeu_si128((__m128i*)&p[0 * stride], q0); + _mm_storeu_si128((__m128i*)&p[1 * stride], q1); + } +} + +static void HFilter16iSSE2(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + int k; + uint8_t* b; + __m128i mask; + __m128i t1, t2, p1, p0, q0, q1; + + for (k = 3; k > 0; --k) { + b = p; + Load16x4(b, b + 8 * stride, stride, &t2, &t1, &p1, &p0); // p3, p2, p1, p0 + MAX_DIFF1(t2, t1, p1, p0, mask); + + b += 4; // beginning of q0 + Load16x4(b, b + 8 * stride, stride, &q0, &q1, &t1, &t2); // q0, q1, q2, q3 + MAX_DIFF2(t2, t1, q1, q0, mask); + + COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); + + b -= 2; // beginning of p1 + Store16x4(b, b + 8 * stride, stride, &p1, &p0, &q0, &q1); + + p += 4; + } +} + +// 8-pixels wide variant, for chroma filtering +static void VFilter8SSE2(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + __m128i mask; + __m128i t1, p2, p1, p0, q0, q1, q2; + + // Load p3, p2, p1, p0 + LOADUV_H_EDGES4(u - 4 * stride, v - 4 * stride, stride, t1, p2, p1, p0); + MAX_DIFF1(t1, p2, p1, p0, mask); + + // Load q0, q1, q2, q3 + LOADUV_H_EDGES4(u, v, stride, q0, q1, q2, t1); + MAX_DIFF2(t1, q2, q1, q0, mask); + + COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); + + // Store + STOREUV(p2, u, v, -3 * stride); + STOREUV(p1, u, v, -2 * stride); + STOREUV(p0, u, v, -1 * stride); + STOREUV(q0, u, v, 0 * stride); + STOREUV(q1, u, v, 1 * stride); + STOREUV(q2, u, v, 2 * stride); +} + +static void HFilter8SSE2(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + __m128i mask; + __m128i p3, p2, p1, p0, q0, q1, q2, q3; + + uint8_t* const tu = u - 4; + uint8_t* const tv = v - 4; + Load16x4(tu, tv, stride, &p3, &p2, &p1, &p0); // p3, p2, p1, p0 + MAX_DIFF1(p3, p2, p1, p0, mask); + + Load16x4(u, v, stride, &q0, &q1, &q2, &q3); // q0, q1, q2, q3 + MAX_DIFF2(q3, q2, q1, q0, mask); + + COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); + + Store16x4(tu, tv, stride, &p3, &p2, &p1, &p0); + Store16x4(u, v, stride, &q0, &q1, &q2, &q3); +} + +static void VFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + __m128i mask; + __m128i t1, t2, p1, p0, q0, q1; + + // Load p3, p2, p1, p0 + LOADUV_H_EDGES4(u, v, stride, t2, t1, p1, p0); + MAX_DIFF1(t2, t1, p1, p0, mask); + + u += 4 * stride; + v += 4 * stride; + + // Load q0, q1, q2, q3 + LOADUV_H_EDGES4(u, v, stride, q0, q1, t1, t2); + MAX_DIFF2(t2, t1, q1, q0, mask); + + COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); + + // Store + STOREUV(p1, u, v, -2 * stride); + STOREUV(p0, u, v, -1 * stride); + STOREUV(q0, u, v, 0 * stride); + STOREUV(q1, u, v, 1 * stride); +} + +static void HFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + __m128i mask; + __m128i t1, t2, p1, p0, q0, q1; + Load16x4(u, v, stride, &t2, &t1, &p1, &p0); // p3, p2, p1, p0 + MAX_DIFF1(t2, t1, p1, p0, mask); + + u += 4; // beginning of q0 + v += 4; + Load16x4(u, v, stride, &q0, &q1, &t1, &t2); // q0, q1, q2, q3 + MAX_DIFF2(t2, t1, q1, q0, mask); + + COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); + DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); + + u -= 2; // beginning of p1 + v -= 2; + Store16x4(u, v, stride, &p1, &p0, &q0, &q1); +} + +extern void VP8DspInitSSE2(void); + +void VP8DspInitSSE2(void) { + VP8Transform = TransformSSE2; + + VP8VFilter16 = VFilter16SSE2; + VP8HFilter16 = HFilter16SSE2; + VP8VFilter8 = VFilter8SSE2; + VP8HFilter8 = HFilter8SSE2; + VP8VFilter16i = VFilter16iSSE2; + VP8HFilter16i = HFilter16iSSE2; + VP8VFilter8i = VFilter8iSSE2; + VP8HFilter8i = HFilter8iSSE2; + + VP8SimpleVFilter16 = SimpleVFilter16SSE2; + VP8SimpleHFilter16 = SimpleHFilter16SSE2; + VP8SimpleVFilter16i = SimpleVFilter16iSSE2; + VP8SimpleHFilter16i = SimpleHFilter16iSSE2; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif // WEBP_USE_SSE2 diff --git a/drivers/webpold/dsp/dsp.h b/drivers/webpold/dsp/dsp.h new file mode 100644 index 0000000000..fd686a8532 --- /dev/null +++ b/drivers/webpold/dsp/dsp.h @@ -0,0 +1,210 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Speed-critical functions. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_DSP_DSP_H_ +#define WEBP_DSP_DSP_H_ + +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// CPU detection + +#if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86)) +#define WEBP_MSC_SSE2 // Visual C++ SSE2 targets +#endif + +#if defined(__SSE2__) || defined(WEBP_MSC_SSE2) +#define WEBP_USE_SSE2 +#endif + +#if defined(__ANDROID__) && defined(__ARM_ARCH_7A__) && defined(__ARM_NEON__) +#define WEBP_ANDROID_NEON // Android targets that might support NEON +#endif + +#if ( (defined(__ARM_NEON__) && !defined(__aarch64__)) || defined(WEBP_ANDROID_NEON)) && !defined(PSP2_ENABLED) +#define WEBP_USE_NEON +#endif + +typedef enum { + kSSE2, + kSSE3, + kNEON +} CPUFeature; +// returns true if the CPU supports the feature. +typedef int (*VP8CPUInfo)(CPUFeature feature); +extern VP8CPUInfo VP8GetCPUInfo; + +//------------------------------------------------------------------------------ +// Encoding + +int VP8GetAlpha(const int histo[]); + +// Transforms +// VP8Idct: Does one of two inverse transforms. If do_two is set, the transforms +// will be done for (ref, in, dst) and (ref + 4, in + 16, dst + 4). +typedef void (*VP8Idct)(const uint8_t* ref, const int16_t* in, uint8_t* dst, + int do_two); +typedef void (*VP8Fdct)(const uint8_t* src, const uint8_t* ref, int16_t* out); +typedef void (*VP8WHT)(const int16_t* in, int16_t* out); +extern VP8Idct VP8ITransform; +extern VP8Fdct VP8FTransform; +extern VP8WHT VP8ITransformWHT; +extern VP8WHT VP8FTransformWHT; +// Predictions +// *dst is the destination block. *top and *left can be NULL. +typedef void (*VP8IntraPreds)(uint8_t *dst, const uint8_t* left, + const uint8_t* top); +typedef void (*VP8Intra4Preds)(uint8_t *dst, const uint8_t* top); +extern VP8Intra4Preds VP8EncPredLuma4; +extern VP8IntraPreds VP8EncPredLuma16; +extern VP8IntraPreds VP8EncPredChroma8; + +typedef int (*VP8Metric)(const uint8_t* pix, const uint8_t* ref); +extern VP8Metric VP8SSE16x16, VP8SSE16x8, VP8SSE8x8, VP8SSE4x4; +typedef int (*VP8WMetric)(const uint8_t* pix, const uint8_t* ref, + const uint16_t* const weights); +extern VP8WMetric VP8TDisto4x4, VP8TDisto16x16; + +typedef void (*VP8BlockCopy)(const uint8_t* src, uint8_t* dst); +extern VP8BlockCopy VP8Copy4x4; +// Quantization +struct VP8Matrix; // forward declaration +typedef int (*VP8QuantizeBlock)(int16_t in[16], int16_t out[16], + int n, const struct VP8Matrix* const mtx); +extern VP8QuantizeBlock VP8EncQuantizeBlock; + +// Compute susceptibility based on DCT-coeff histograms: +// the higher, the "easier" the macroblock is to compress. +typedef int (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block); +extern const int VP8DspScan[16 + 4 + 4]; +extern VP8CHisto VP8CollectHistogram; + +void VP8EncDspInit(void); // must be called before using any of the above + +//------------------------------------------------------------------------------ +// Decoding + +typedef void (*VP8DecIdct)(const int16_t* coeffs, uint8_t* dst); +// when doing two transforms, coeffs is actually int16_t[2][16]. +typedef void (*VP8DecIdct2)(const int16_t* coeffs, uint8_t* dst, int do_two); +extern VP8DecIdct2 VP8Transform; +extern VP8DecIdct VP8TransformUV; +extern VP8DecIdct VP8TransformDC; +extern VP8DecIdct VP8TransformDCUV; +extern void (*VP8TransformWHT)(const int16_t* in, int16_t* out); + +// *dst is the destination block, with stride BPS. Boundary samples are +// assumed accessible when needed. +typedef void (*VP8PredFunc)(uint8_t* dst); +extern const VP8PredFunc VP8PredLuma16[/* NUM_B_DC_MODES */]; +extern const VP8PredFunc VP8PredChroma8[/* NUM_B_DC_MODES */]; +extern const VP8PredFunc VP8PredLuma4[/* NUM_BMODES */]; + +// simple filter (only for luma) +typedef void (*VP8SimpleFilterFunc)(uint8_t* p, int stride, int thresh); +extern VP8SimpleFilterFunc VP8SimpleVFilter16; +extern VP8SimpleFilterFunc VP8SimpleHFilter16; +extern VP8SimpleFilterFunc VP8SimpleVFilter16i; // filter 3 inner edges +extern VP8SimpleFilterFunc VP8SimpleHFilter16i; + +// regular filter (on both macroblock edges and inner edges) +typedef void (*VP8LumaFilterFunc)(uint8_t* luma, int stride, + int thresh, int ithresh, int hev_t); +typedef void (*VP8ChromaFilterFunc)(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_t); +// on outer edge +extern VP8LumaFilterFunc VP8VFilter16; +extern VP8LumaFilterFunc VP8HFilter16; +extern VP8ChromaFilterFunc VP8VFilter8; +extern VP8ChromaFilterFunc VP8HFilter8; + +// on inner edge +extern VP8LumaFilterFunc VP8VFilter16i; // filtering 3 inner edges altogether +extern VP8LumaFilterFunc VP8HFilter16i; +extern VP8ChromaFilterFunc VP8VFilter8i; // filtering u and v altogether +extern VP8ChromaFilterFunc VP8HFilter8i; + +// must be called before anything using the above +void VP8DspInit(void); + +//------------------------------------------------------------------------------ +// WebP I/O + +#define FANCY_UPSAMPLING // undefined to remove fancy upsampling support + +typedef void (*WebPUpsampleLinePairFunc)( + const uint8_t* top_y, const uint8_t* bottom_y, + const uint8_t* top_u, const uint8_t* top_v, + const uint8_t* cur_u, const uint8_t* cur_v, + uint8_t* top_dst, uint8_t* bottom_dst, int len); + +#ifdef FANCY_UPSAMPLING + +// Fancy upsampling functions to convert YUV to RGB(A) modes +extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; + +// Initializes SSE2 version of the fancy upsamplers. +void WebPInitUpsamplersSSE2(void); + +#endif // FANCY_UPSAMPLING + +// Point-sampling methods. +typedef void (*WebPSampleLinePairFunc)( + const uint8_t* top_y, const uint8_t* bottom_y, + const uint8_t* u, const uint8_t* v, + uint8_t* top_dst, uint8_t* bottom_dst, int len); + +extern const WebPSampleLinePairFunc WebPSamplers[/* MODE_LAST */]; + +// General function for converting two lines of ARGB or RGBA. +// 'alpha_is_last' should be true if 0xff000000 is stored in memory as +// as 0x00, 0x00, 0x00, 0xff (little endian). +WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last); + +// YUV444->RGB converters +typedef void (*WebPYUV444Converter)(const uint8_t* y, + const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len); + +extern const WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */]; + +// Main function to be called +void WebPInitUpsamplers(void); + +//------------------------------------------------------------------------------ +// Pre-multiply planes with alpha values + +// Apply alpha pre-multiply on an rgba, bgra or argb plane of size w * h. +// alpha_first should be 0 for argb, 1 for rgba or bgra (where alpha is last). +extern void (*WebPApplyAlphaMultiply)( + uint8_t* rgba, int alpha_first, int w, int h, int stride); + +// Same, buf specifically for RGBA4444 format +extern void (*WebPApplyAlphaMultiply4444)( + uint8_t* rgba4444, int w, int h, int stride); + +// To be called first before using the above. +void WebPInitPremultiply(void); + +void WebPInitPremultiplySSE2(void); // should not be called directly. + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_DSP_DSP_H_ */ diff --git a/drivers/webpold/dsp/enc.c b/drivers/webpold/dsp/enc.c new file mode 100644 index 0000000000..02234564be --- /dev/null +++ b/drivers/webpold/dsp/enc.c @@ -0,0 +1,743 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Speed-critical encoding functions. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> // for abs() +#include "./dsp.h" +#include "../enc/vp8enci.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Compute susceptibility based on DCT-coeff histograms: +// the higher, the "easier" the macroblock is to compress. + +static int ClipAlpha(int alpha) { + return alpha < 0 ? 0 : alpha > 255 ? 255 : alpha; +} + +int VP8GetAlpha(const int histo[MAX_COEFF_THRESH + 1]) { + int num = 0, den = 0, val = 0; + int k; + int alpha; + // note: changing this loop to avoid the numerous "k + 1" slows things down. + for (k = 0; k < MAX_COEFF_THRESH; ++k) { + if (histo[k + 1]) { + val += histo[k + 1]; + num += val * (k + 1); + den += (k + 1) * (k + 1); + } + } + // we scale the value to a usable [0..255] range + alpha = den ? 10 * num / den - 5 : 0; + return ClipAlpha(alpha); +} + +const int VP8DspScan[16 + 4 + 4] = { + // Luma + 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS, + 0 + 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS, + 0 + 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS, + 0 + 12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS, + + 0 + 0 * BPS, 4 + 0 * BPS, 0 + 4 * BPS, 4 + 4 * BPS, // U + 8 + 0 * BPS, 12 + 0 * BPS, 8 + 4 * BPS, 12 + 4 * BPS // V +}; + +static int CollectHistogram(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block) { + int histo[MAX_COEFF_THRESH + 1] = { 0 }; + int16_t out[16]; + int j, k; + for (j = start_block; j < end_block; ++j) { + VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); + + // Convert coefficients to bin (within out[]). + for (k = 0; k < 16; ++k) { + const int v = abs(out[k]) >> 2; + out[k] = (v > MAX_COEFF_THRESH) ? MAX_COEFF_THRESH : v; + } + + // Use bin to update histogram. + for (k = 0; k < 16; ++k) { + histo[out[k]]++; + } + } + + return VP8GetAlpha(histo); +} + +//------------------------------------------------------------------------------ +// run-time tables (~4k) + +static uint8_t clip1[255 + 510 + 1]; // clips [-255,510] to [0,255] + +// We declare this variable 'volatile' to prevent instruction reordering +// and make sure it's set to true _last_ (so as to be thread-safe) +static volatile int tables_ok = 0; + +static void InitTables(void) { + if (!tables_ok) { + int i; + for (i = -255; i <= 255 + 255; ++i) { + clip1[255 + i] = (i < 0) ? 0 : (i > 255) ? 255 : i; + } + tables_ok = 1; + } +} + +static WEBP_INLINE uint8_t clip_8b(int v) { + return (!(v & ~0xff)) ? v : v < 0 ? 0 : 255; +} + +//------------------------------------------------------------------------------ +// Transforms (Paragraph 14.4) + +#define STORE(x, y, v) \ + dst[(x) + (y) * BPS] = clip_8b(ref[(x) + (y) * BPS] + ((v) >> 3)) + +static const int kC1 = 20091 + (1 << 16); +static const int kC2 = 35468; +#define MUL(a, b) (((a) * (b)) >> 16) + +static WEBP_INLINE void ITransformOne(const uint8_t* ref, const int16_t* in, + uint8_t* dst) { + int C[4 * 4], *tmp; + int i; + tmp = C; + for (i = 0; i < 4; ++i) { // vertical pass + const int a = in[0] + in[8]; + const int b = in[0] - in[8]; + const int c = MUL(in[4], kC2) - MUL(in[12], kC1); + const int d = MUL(in[4], kC1) + MUL(in[12], kC2); + tmp[0] = a + d; + tmp[1] = b + c; + tmp[2] = b - c; + tmp[3] = a - d; + tmp += 4; + in++; + } + + tmp = C; + for (i = 0; i < 4; ++i) { // horizontal pass + const int dc = tmp[0] + 4; + const int a = dc + tmp[8]; + const int b = dc - tmp[8]; + const int c = MUL(tmp[4], kC2) - MUL(tmp[12], kC1); + const int d = MUL(tmp[4], kC1) + MUL(tmp[12], kC2); + STORE(0, i, a + d); + STORE(1, i, b + c); + STORE(2, i, b - c); + STORE(3, i, a - d); + tmp++; + } +} + +static void ITransform(const uint8_t* ref, const int16_t* in, uint8_t* dst, + int do_two) { + ITransformOne(ref, in, dst); + if (do_two) { + ITransformOne(ref + 4, in + 16, dst + 4); + } +} + +static void FTransform(const uint8_t* src, const uint8_t* ref, int16_t* out) { + int i; + int tmp[16]; + for (i = 0; i < 4; ++i, src += BPS, ref += BPS) { + const int d0 = src[0] - ref[0]; + const int d1 = src[1] - ref[1]; + const int d2 = src[2] - ref[2]; + const int d3 = src[3] - ref[3]; + const int a0 = (d0 + d3) << 3; + const int a1 = (d1 + d2) << 3; + const int a2 = (d1 - d2) << 3; + const int a3 = (d0 - d3) << 3; + tmp[0 + i * 4] = (a0 + a1); + tmp[1 + i * 4] = (a2 * 2217 + a3 * 5352 + 14500) >> 12; + tmp[2 + i * 4] = (a0 - a1); + tmp[3 + i * 4] = (a3 * 2217 - a2 * 5352 + 7500) >> 12; + } + for (i = 0; i < 4; ++i) { + const int a0 = (tmp[0 + i] + tmp[12 + i]); + const int a1 = (tmp[4 + i] + tmp[ 8 + i]); + const int a2 = (tmp[4 + i] - tmp[ 8 + i]); + const int a3 = (tmp[0 + i] - tmp[12 + i]); + out[0 + i] = (a0 + a1 + 7) >> 4; + out[4 + i] = ((a2 * 2217 + a3 * 5352 + 12000) >> 16) + (a3 != 0); + out[8 + i] = (a0 - a1 + 7) >> 4; + out[12+ i] = ((a3 * 2217 - a2 * 5352 + 51000) >> 16); + } +} + +static void ITransformWHT(const int16_t* in, int16_t* out) { + int tmp[16]; + int i; + for (i = 0; i < 4; ++i) { + const int a0 = in[0 + i] + in[12 + i]; + const int a1 = in[4 + i] + in[ 8 + i]; + const int a2 = in[4 + i] - in[ 8 + i]; + const int a3 = in[0 + i] - in[12 + i]; + tmp[0 + i] = a0 + a1; + tmp[8 + i] = a0 - a1; + tmp[4 + i] = a3 + a2; + tmp[12 + i] = a3 - a2; + } + for (i = 0; i < 4; ++i) { + const int dc = tmp[0 + i * 4] + 3; // w/ rounder + const int a0 = dc + tmp[3 + i * 4]; + const int a1 = tmp[1 + i * 4] + tmp[2 + i * 4]; + const int a2 = tmp[1 + i * 4] - tmp[2 + i * 4]; + const int a3 = dc - tmp[3 + i * 4]; + out[ 0] = (a0 + a1) >> 3; + out[16] = (a3 + a2) >> 3; + out[32] = (a0 - a1) >> 3; + out[48] = (a3 - a2) >> 3; + out += 64; + } +} + +static void FTransformWHT(const int16_t* in, int16_t* out) { + int tmp[16]; + int i; + for (i = 0; i < 4; ++i, in += 64) { + const int a0 = (in[0 * 16] + in[2 * 16]) << 2; + const int a1 = (in[1 * 16] + in[3 * 16]) << 2; + const int a2 = (in[1 * 16] - in[3 * 16]) << 2; + const int a3 = (in[0 * 16] - in[2 * 16]) << 2; + tmp[0 + i * 4] = (a0 + a1) + (a0 != 0); + tmp[1 + i * 4] = a3 + a2; + tmp[2 + i * 4] = a3 - a2; + tmp[3 + i * 4] = a0 - a1; + } + for (i = 0; i < 4; ++i) { + const int a0 = (tmp[0 + i] + tmp[8 + i]); + const int a1 = (tmp[4 + i] + tmp[12+ i]); + const int a2 = (tmp[4 + i] - tmp[12+ i]); + const int a3 = (tmp[0 + i] - tmp[8 + i]); + const int b0 = a0 + a1; + const int b1 = a3 + a2; + const int b2 = a3 - a2; + const int b3 = a0 - a1; + out[ 0 + i] = (b0 + (b0 > 0) + 3) >> 3; + out[ 4 + i] = (b1 + (b1 > 0) + 3) >> 3; + out[ 8 + i] = (b2 + (b2 > 0) + 3) >> 3; + out[12 + i] = (b3 + (b3 > 0) + 3) >> 3; + } +} + +#undef MUL +#undef STORE + +//------------------------------------------------------------------------------ +// Intra predictions + +#define DST(x, y) dst[(x) + (y) * BPS] + +static WEBP_INLINE void Fill(uint8_t* dst, int value, int size) { + int j; + for (j = 0; j < size; ++j) { + memset(dst + j * BPS, value, size); + } +} + +static WEBP_INLINE void VerticalPred(uint8_t* dst, + const uint8_t* top, int size) { + int j; + if (top) { + for (j = 0; j < size; ++j) memcpy(dst + j * BPS, top, size); + } else { + Fill(dst, 127, size); + } +} + +static WEBP_INLINE void HorizontalPred(uint8_t* dst, + const uint8_t* left, int size) { + if (left) { + int j; + for (j = 0; j < size; ++j) { + memset(dst + j * BPS, left[j], size); + } + } else { + Fill(dst, 129, size); + } +} + +static WEBP_INLINE void TrueMotion(uint8_t* dst, const uint8_t* left, + const uint8_t* top, int size) { + int y; + if (left) { + if (top) { + const uint8_t* const clip = clip1 + 255 - left[-1]; + for (y = 0; y < size; ++y) { + const uint8_t* const clip_table = clip + left[y]; + int x; + for (x = 0; x < size; ++x) { + dst[x] = clip_table[top[x]]; + } + dst += BPS; + } + } else { + HorizontalPred(dst, left, size); + } + } else { + // true motion without left samples (hence: with default 129 value) + // is equivalent to VE prediction where you just copy the top samples. + // Note that if top samples are not available, the default value is + // then 129, and not 127 as in the VerticalPred case. + if (top) { + VerticalPred(dst, top, size); + } else { + Fill(dst, 129, size); + } + } +} + +static WEBP_INLINE void DCMode(uint8_t* dst, const uint8_t* left, + const uint8_t* top, + int size, int round, int shift) { + int DC = 0; + int j; + if (top) { + for (j = 0; j < size; ++j) DC += top[j]; + if (left) { // top and left present + for (j = 0; j < size; ++j) DC += left[j]; + } else { // top, but no left + DC += DC; + } + DC = (DC + round) >> shift; + } else if (left) { // left but no top + for (j = 0; j < size; ++j) DC += left[j]; + DC += DC; + DC = (DC + round) >> shift; + } else { // no top, no left, nothing. + DC = 0x80; + } + Fill(dst, DC, size); +} + +//------------------------------------------------------------------------------ +// Chroma 8x8 prediction (paragraph 12.2) + +static void IntraChromaPreds(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + // U block + DCMode(C8DC8 + dst, left, top, 8, 8, 4); + VerticalPred(C8VE8 + dst, top, 8); + HorizontalPred(C8HE8 + dst, left, 8); + TrueMotion(C8TM8 + dst, left, top, 8); + // V block + dst += 8; + if (top) top += 8; + if (left) left += 16; + DCMode(C8DC8 + dst, left, top, 8, 8, 4); + VerticalPred(C8VE8 + dst, top, 8); + HorizontalPred(C8HE8 + dst, left, 8); + TrueMotion(C8TM8 + dst, left, top, 8); +} + +//------------------------------------------------------------------------------ +// luma 16x16 prediction (paragraph 12.3) + +static void Intra16Preds(uint8_t* dst, + const uint8_t* left, const uint8_t* top) { + DCMode(I16DC16 + dst, left, top, 16, 16, 5); + VerticalPred(I16VE16 + dst, top, 16); + HorizontalPred(I16HE16 + dst, left, 16); + TrueMotion(I16TM16 + dst, left, top, 16); +} + +//------------------------------------------------------------------------------ +// luma 4x4 prediction + +#define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2) +#define AVG2(a, b) (((a) + (b) + 1) >> 1) + +static void VE4(uint8_t* dst, const uint8_t* top) { // vertical + const uint8_t vals[4] = { + AVG3(top[-1], top[0], top[1]), + AVG3(top[ 0], top[1], top[2]), + AVG3(top[ 1], top[2], top[3]), + AVG3(top[ 2], top[3], top[4]) + }; + int i; + for (i = 0; i < 4; ++i) { + memcpy(dst + i * BPS, vals, 4); + } +} + +static void HE4(uint8_t* dst, const uint8_t* top) { // horizontal + const int X = top[-1]; + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int L = top[-5]; + *(uint32_t*)(dst + 0 * BPS) = 0x01010101U * AVG3(X, I, J); + *(uint32_t*)(dst + 1 * BPS) = 0x01010101U * AVG3(I, J, K); + *(uint32_t*)(dst + 2 * BPS) = 0x01010101U * AVG3(J, K, L); + *(uint32_t*)(dst + 3 * BPS) = 0x01010101U * AVG3(K, L, L); +} + +static void DC4(uint8_t* dst, const uint8_t* top) { + uint32_t dc = 4; + int i; + for (i = 0; i < 4; ++i) dc += top[i] + top[-5 + i]; + Fill(dst, dc >> 3, 4); +} + +static void RD4(uint8_t* dst, const uint8_t* top) { + const int X = top[-1]; + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int L = top[-5]; + const int A = top[0]; + const int B = top[1]; + const int C = top[2]; + const int D = top[3]; + DST(0, 3) = AVG3(J, K, L); + DST(0, 2) = DST(1, 3) = AVG3(I, J, K); + DST(0, 1) = DST(1, 2) = DST(2, 3) = AVG3(X, I, J); + DST(0, 0) = DST(1, 1) = DST(2, 2) = DST(3, 3) = AVG3(A, X, I); + DST(1, 0) = DST(2, 1) = DST(3, 2) = AVG3(B, A, X); + DST(2, 0) = DST(3, 1) = AVG3(C, B, A); + DST(3, 0) = AVG3(D, C, B); +} + +static void LD4(uint8_t* dst, const uint8_t* top) { + const int A = top[0]; + const int B = top[1]; + const int C = top[2]; + const int D = top[3]; + const int E = top[4]; + const int F = top[5]; + const int G = top[6]; + const int H = top[7]; + DST(0, 0) = AVG3(A, B, C); + DST(1, 0) = DST(0, 1) = AVG3(B, C, D); + DST(2, 0) = DST(1, 1) = DST(0, 2) = AVG3(C, D, E); + DST(3, 0) = DST(2, 1) = DST(1, 2) = DST(0, 3) = AVG3(D, E, F); + DST(3, 1) = DST(2, 2) = DST(1, 3) = AVG3(E, F, G); + DST(3, 2) = DST(2, 3) = AVG3(F, G, H); + DST(3, 3) = AVG3(G, H, H); +} + +static void VR4(uint8_t* dst, const uint8_t* top) { + const int X = top[-1]; + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int A = top[0]; + const int B = top[1]; + const int C = top[2]; + const int D = top[3]; + DST(0, 0) = DST(1, 2) = AVG2(X, A); + DST(1, 0) = DST(2, 2) = AVG2(A, B); + DST(2, 0) = DST(3, 2) = AVG2(B, C); + DST(3, 0) = AVG2(C, D); + + DST(0, 3) = AVG3(K, J, I); + DST(0, 2) = AVG3(J, I, X); + DST(0, 1) = DST(1, 3) = AVG3(I, X, A); + DST(1, 1) = DST(2, 3) = AVG3(X, A, B); + DST(2, 1) = DST(3, 3) = AVG3(A, B, C); + DST(3, 1) = AVG3(B, C, D); +} + +static void VL4(uint8_t* dst, const uint8_t* top) { + const int A = top[0]; + const int B = top[1]; + const int C = top[2]; + const int D = top[3]; + const int E = top[4]; + const int F = top[5]; + const int G = top[6]; + const int H = top[7]; + DST(0, 0) = AVG2(A, B); + DST(1, 0) = DST(0, 2) = AVG2(B, C); + DST(2, 0) = DST(1, 2) = AVG2(C, D); + DST(3, 0) = DST(2, 2) = AVG2(D, E); + + DST(0, 1) = AVG3(A, B, C); + DST(1, 1) = DST(0, 3) = AVG3(B, C, D); + DST(2, 1) = DST(1, 3) = AVG3(C, D, E); + DST(3, 1) = DST(2, 3) = AVG3(D, E, F); + DST(3, 2) = AVG3(E, F, G); + DST(3, 3) = AVG3(F, G, H); +} + +static void HU4(uint8_t* dst, const uint8_t* top) { + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int L = top[-5]; + DST(0, 0) = AVG2(I, J); + DST(2, 0) = DST(0, 1) = AVG2(J, K); + DST(2, 1) = DST(0, 2) = AVG2(K, L); + DST(1, 0) = AVG3(I, J, K); + DST(3, 0) = DST(1, 1) = AVG3(J, K, L); + DST(3, 1) = DST(1, 2) = AVG3(K, L, L); + DST(3, 2) = DST(2, 2) = + DST(0, 3) = DST(1, 3) = DST(2, 3) = DST(3, 3) = L; +} + +static void HD4(uint8_t* dst, const uint8_t* top) { + const int X = top[-1]; + const int I = top[-2]; + const int J = top[-3]; + const int K = top[-4]; + const int L = top[-5]; + const int A = top[0]; + const int B = top[1]; + const int C = top[2]; + + DST(0, 0) = DST(2, 1) = AVG2(I, X); + DST(0, 1) = DST(2, 2) = AVG2(J, I); + DST(0, 2) = DST(2, 3) = AVG2(K, J); + DST(0, 3) = AVG2(L, K); + + DST(3, 0) = AVG3(A, B, C); + DST(2, 0) = AVG3(X, A, B); + DST(1, 0) = DST(3, 1) = AVG3(I, X, A); + DST(1, 1) = DST(3, 2) = AVG3(J, I, X); + DST(1, 2) = DST(3, 3) = AVG3(K, J, I); + DST(1, 3) = AVG3(L, K, J); +} + +static void TM4(uint8_t* dst, const uint8_t* top) { + int x, y; + const uint8_t* const clip = clip1 + 255 - top[-1]; + for (y = 0; y < 4; ++y) { + const uint8_t* const clip_table = clip + top[-2 - y]; + for (x = 0; x < 4; ++x) { + dst[x] = clip_table[top[x]]; + } + dst += BPS; + } +} + +#undef DST +#undef AVG3 +#undef AVG2 + +// Left samples are top[-5 .. -2], top_left is top[-1], top are +// located at top[0..3], and top right is top[4..7] +static void Intra4Preds(uint8_t* dst, const uint8_t* top) { + DC4(I4DC4 + dst, top); + TM4(I4TM4 + dst, top); + VE4(I4VE4 + dst, top); + HE4(I4HE4 + dst, top); + RD4(I4RD4 + dst, top); + VR4(I4VR4 + dst, top); + LD4(I4LD4 + dst, top); + VL4(I4VL4 + dst, top); + HD4(I4HD4 + dst, top); + HU4(I4HU4 + dst, top); +} + +//------------------------------------------------------------------------------ +// Metric + +static WEBP_INLINE int GetSSE(const uint8_t* a, const uint8_t* b, + int w, int h) { + int count = 0; + int y, x; + for (y = 0; y < h; ++y) { + for (x = 0; x < w; ++x) { + const int diff = (int)a[x] - b[x]; + count += diff * diff; + } + a += BPS; + b += BPS; + } + return count; +} + +static int SSE16x16(const uint8_t* a, const uint8_t* b) { + return GetSSE(a, b, 16, 16); +} +static int SSE16x8(const uint8_t* a, const uint8_t* b) { + return GetSSE(a, b, 16, 8); +} +static int SSE8x8(const uint8_t* a, const uint8_t* b) { + return GetSSE(a, b, 8, 8); +} +static int SSE4x4(const uint8_t* a, const uint8_t* b) { + return GetSSE(a, b, 4, 4); +} + +//------------------------------------------------------------------------------ +// Texture distortion +// +// We try to match the spectral content (weighted) between source and +// reconstructed samples. + +// Hadamard transform +// Returns the weighted sum of the absolute value of transformed coefficients. +static int TTransform(const uint8_t* in, const uint16_t* w) { + int sum = 0; + int tmp[16]; + int i; + // horizontal pass + for (i = 0; i < 4; ++i, in += BPS) { + const int a0 = (in[0] + in[2]) << 2; + const int a1 = (in[1] + in[3]) << 2; + const int a2 = (in[1] - in[3]) << 2; + const int a3 = (in[0] - in[2]) << 2; + tmp[0 + i * 4] = a0 + a1 + (a0 != 0); + tmp[1 + i * 4] = a3 + a2; + tmp[2 + i * 4] = a3 - a2; + tmp[3 + i * 4] = a0 - a1; + } + // vertical pass + for (i = 0; i < 4; ++i, ++w) { + const int a0 = (tmp[0 + i] + tmp[8 + i]); + const int a1 = (tmp[4 + i] + tmp[12+ i]); + const int a2 = (tmp[4 + i] - tmp[12+ i]); + const int a3 = (tmp[0 + i] - tmp[8 + i]); + const int b0 = a0 + a1; + const int b1 = a3 + a2; + const int b2 = a3 - a2; + const int b3 = a0 - a1; + // abs((b + (b<0) + 3) >> 3) = (abs(b) + 3) >> 3 + sum += w[ 0] * ((abs(b0) + 3) >> 3); + sum += w[ 4] * ((abs(b1) + 3) >> 3); + sum += w[ 8] * ((abs(b2) + 3) >> 3); + sum += w[12] * ((abs(b3) + 3) >> 3); + } + return sum; +} + +static int Disto4x4(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + const int sum1 = TTransform(a, w); + const int sum2 = TTransform(b, w); + return (abs(sum2 - sum1) + 8) >> 4; +} + +static int Disto16x16(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + int D = 0; + int x, y; + for (y = 0; y < 16 * BPS; y += 4 * BPS) { + for (x = 0; x < 16; x += 4) { + D += Disto4x4(a + x + y, b + x + y, w); + } + } + return D; +} + +//------------------------------------------------------------------------------ +// Quantization +// + +static const uint8_t kZigzag[16] = { + 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 +}; + +// Simple quantization +static int QuantizeBlock(int16_t in[16], int16_t out[16], + int n, const VP8Matrix* const mtx) { + int last = -1; + for (; n < 16; ++n) { + const int j = kZigzag[n]; + const int sign = (in[j] < 0); + int coeff = (sign ? -in[j] : in[j]) + mtx->sharpen_[j]; + if (coeff > 2047) coeff = 2047; + if (coeff > mtx->zthresh_[j]) { + const int Q = mtx->q_[j]; + const int iQ = mtx->iq_[j]; + const int B = mtx->bias_[j]; + out[n] = QUANTDIV(coeff, iQ, B); + if (sign) out[n] = -out[n]; + in[j] = out[n] * Q; + if (out[n]) last = n; + } else { + out[n] = 0; + in[j] = 0; + } + } + return (last >= 0); +} + +//------------------------------------------------------------------------------ +// Block copy + +static WEBP_INLINE void Copy(const uint8_t* src, uint8_t* dst, int size) { + int y; + for (y = 0; y < size; ++y) { + memcpy(dst, src, size); + src += BPS; + dst += BPS; + } +} + +static void Copy4x4(const uint8_t* src, uint8_t* dst) { Copy(src, dst, 4); } + +//------------------------------------------------------------------------------ +// Initialization + +// Speed-critical function pointers. We have to initialize them to the default +// implementations within VP8EncDspInit(). +VP8CHisto VP8CollectHistogram; +VP8Idct VP8ITransform; +VP8Fdct VP8FTransform; +VP8WHT VP8ITransformWHT; +VP8WHT VP8FTransformWHT; +VP8Intra4Preds VP8EncPredLuma4; +VP8IntraPreds VP8EncPredLuma16; +VP8IntraPreds VP8EncPredChroma8; +VP8Metric VP8SSE16x16; +VP8Metric VP8SSE8x8; +VP8Metric VP8SSE16x8; +VP8Metric VP8SSE4x4; +VP8WMetric VP8TDisto4x4; +VP8WMetric VP8TDisto16x16; +VP8QuantizeBlock VP8EncQuantizeBlock; +VP8BlockCopy VP8Copy4x4; + +extern void VP8EncDspInitSSE2(void); + +void VP8EncDspInit(void) { + InitTables(); + + // default C implementations + VP8CollectHistogram = CollectHistogram; + VP8ITransform = ITransform; + VP8FTransform = FTransform; + VP8ITransformWHT = ITransformWHT; + VP8FTransformWHT = FTransformWHT; + VP8EncPredLuma4 = Intra4Preds; + VP8EncPredLuma16 = Intra16Preds; + VP8EncPredChroma8 = IntraChromaPreds; + VP8SSE16x16 = SSE16x16; + VP8SSE8x8 = SSE8x8; + VP8SSE16x8 = SSE16x8; + VP8SSE4x4 = SSE4x4; + VP8TDisto4x4 = Disto4x4; + VP8TDisto16x16 = Disto16x16; + VP8EncQuantizeBlock = QuantizeBlock; + VP8Copy4x4 = Copy4x4; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + VP8EncDspInitSSE2(); + } +#endif + } +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dsp/enc_sse2.c b/drivers/webpold/dsp/enc_sse2.c new file mode 100644 index 0000000000..b046761dc1 --- /dev/null +++ b/drivers/webpold/dsp/enc_sse2.c @@ -0,0 +1,837 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// SSE2 version of speed-critical encoding functions. +// +// Author: Christian Duvivier (cduvivier@google.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) +#include <stdlib.h> // for abs() +#include <emmintrin.h> + +#include "../enc/vp8enci.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Compute susceptibility based on DCT-coeff histograms: +// the higher, the "easier" the macroblock is to compress. + +static int CollectHistogramSSE2(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block) { + int histo[MAX_COEFF_THRESH + 1] = { 0 }; + int16_t out[16]; + int j, k; + const __m128i max_coeff_thresh = _mm_set1_epi16(MAX_COEFF_THRESH); + for (j = start_block; j < end_block; ++j) { + VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); + + // Convert coefficients to bin (within out[]). + { + // Load. + const __m128i out0 = _mm_loadu_si128((__m128i*)&out[0]); + const __m128i out1 = _mm_loadu_si128((__m128i*)&out[8]); + // sign(out) = out >> 15 (0x0000 if positive, 0xffff if negative) + const __m128i sign0 = _mm_srai_epi16(out0, 15); + const __m128i sign1 = _mm_srai_epi16(out1, 15); + // abs(out) = (out ^ sign) - sign + const __m128i xor0 = _mm_xor_si128(out0, sign0); + const __m128i xor1 = _mm_xor_si128(out1, sign1); + const __m128i abs0 = _mm_sub_epi16(xor0, sign0); + const __m128i abs1 = _mm_sub_epi16(xor1, sign1); + // v = abs(out) >> 2 + const __m128i v0 = _mm_srai_epi16(abs0, 2); + const __m128i v1 = _mm_srai_epi16(abs1, 2); + // bin = min(v, MAX_COEFF_THRESH) + const __m128i bin0 = _mm_min_epi16(v0, max_coeff_thresh); + const __m128i bin1 = _mm_min_epi16(v1, max_coeff_thresh); + // Store. + _mm_storeu_si128((__m128i*)&out[0], bin0); + _mm_storeu_si128((__m128i*)&out[8], bin1); + } + + // Use bin to update histogram. + for (k = 0; k < 16; ++k) { + histo[out[k]]++; + } + } + + return VP8GetAlpha(histo); +} + +//------------------------------------------------------------------------------ +// Transforms (Paragraph 14.4) + +// Does one or two inverse transforms. +static void ITransformSSE2(const uint8_t* ref, const int16_t* in, uint8_t* dst, + int do_two) { + // This implementation makes use of 16-bit fixed point versions of two + // multiply constants: + // K1 = sqrt(2) * cos (pi/8) ~= 85627 / 2^16 + // K2 = sqrt(2) * sin (pi/8) ~= 35468 / 2^16 + // + // To be able to use signed 16-bit integers, we use the following trick to + // have constants within range: + // - Associated constants are obtained by subtracting the 16-bit fixed point + // version of one: + // k = K - (1 << 16) => K = k + (1 << 16) + // K1 = 85267 => k1 = 20091 + // K2 = 35468 => k2 = -30068 + // - The multiplication of a variable by a constant become the sum of the + // variable and the multiplication of that variable by the associated + // constant: + // (x * K) >> 16 = (x * (k + (1 << 16))) >> 16 = ((x * k ) >> 16) + x + const __m128i k1 = _mm_set1_epi16(20091); + const __m128i k2 = _mm_set1_epi16(-30068); + __m128i T0, T1, T2, T3; + + // Load and concatenate the transform coefficients (we'll do two inverse + // transforms in parallel). In the case of only one inverse transform, the + // second half of the vectors will just contain random value we'll never + // use nor store. + __m128i in0, in1, in2, in3; + { + in0 = _mm_loadl_epi64((__m128i*)&in[0]); + in1 = _mm_loadl_epi64((__m128i*)&in[4]); + in2 = _mm_loadl_epi64((__m128i*)&in[8]); + in3 = _mm_loadl_epi64((__m128i*)&in[12]); + // a00 a10 a20 a30 x x x x + // a01 a11 a21 a31 x x x x + // a02 a12 a22 a32 x x x x + // a03 a13 a23 a33 x x x x + if (do_two) { + const __m128i inB0 = _mm_loadl_epi64((__m128i*)&in[16]); + const __m128i inB1 = _mm_loadl_epi64((__m128i*)&in[20]); + const __m128i inB2 = _mm_loadl_epi64((__m128i*)&in[24]); + const __m128i inB3 = _mm_loadl_epi64((__m128i*)&in[28]); + in0 = _mm_unpacklo_epi64(in0, inB0); + in1 = _mm_unpacklo_epi64(in1, inB1); + in2 = _mm_unpacklo_epi64(in2, inB2); + in3 = _mm_unpacklo_epi64(in3, inB3); + // a00 a10 a20 a30 b00 b10 b20 b30 + // a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 + // a03 a13 a23 a33 b03 b13 b23 b33 + } + } + + // Vertical pass and subsequent transpose. + { + // First pass, c and d calculations are longer because of the "trick" + // multiplications. + const __m128i a = _mm_add_epi16(in0, in2); + const __m128i b = _mm_sub_epi16(in0, in2); + // c = MUL(in1, K2) - MUL(in3, K1) = MUL(in1, k2) - MUL(in3, k1) + in1 - in3 + const __m128i c1 = _mm_mulhi_epi16(in1, k2); + const __m128i c2 = _mm_mulhi_epi16(in3, k1); + const __m128i c3 = _mm_sub_epi16(in1, in3); + const __m128i c4 = _mm_sub_epi16(c1, c2); + const __m128i c = _mm_add_epi16(c3, c4); + // d = MUL(in1, K1) + MUL(in3, K2) = MUL(in1, k1) + MUL(in3, k2) + in1 + in3 + const __m128i d1 = _mm_mulhi_epi16(in1, k1); + const __m128i d2 = _mm_mulhi_epi16(in3, k2); + const __m128i d3 = _mm_add_epi16(in1, in3); + const __m128i d4 = _mm_add_epi16(d1, d2); + const __m128i d = _mm_add_epi16(d3, d4); + + // Second pass. + const __m128i tmp0 = _mm_add_epi16(a, d); + const __m128i tmp1 = _mm_add_epi16(b, c); + const __m128i tmp2 = _mm_sub_epi16(b, c); + const __m128i tmp3 = _mm_sub_epi16(a, d); + + // Transpose the two 4x4. + // a00 a01 a02 a03 b00 b01 b02 b03 + // a10 a11 a12 a13 b10 b11 b12 b13 + // a20 a21 a22 a23 b20 b21 b22 b23 + // a30 a31 a32 a33 b30 b31 b32 b33 + const __m128i transpose0_0 = _mm_unpacklo_epi16(tmp0, tmp1); + const __m128i transpose0_1 = _mm_unpacklo_epi16(tmp2, tmp3); + const __m128i transpose0_2 = _mm_unpackhi_epi16(tmp0, tmp1); + const __m128i transpose0_3 = _mm_unpackhi_epi16(tmp2, tmp3); + // a00 a10 a01 a11 a02 a12 a03 a13 + // a20 a30 a21 a31 a22 a32 a23 a33 + // b00 b10 b01 b11 b02 b12 b03 b13 + // b20 b30 b21 b31 b22 b32 b23 b33 + const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3); + const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3); + // a00 a10 a20 a30 a01 a11 a21 a31 + // b00 b10 b20 b30 b01 b11 b21 b31 + // a02 a12 a22 a32 a03 a13 a23 a33 + // b02 b12 a22 b32 b03 b13 b23 b33 + T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); + T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); + T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); + T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3); + // a00 a10 a20 a30 b00 b10 b20 b30 + // a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 + // a03 a13 a23 a33 b03 b13 b23 b33 + } + + // Horizontal pass and subsequent transpose. + { + // First pass, c and d calculations are longer because of the "trick" + // multiplications. + const __m128i four = _mm_set1_epi16(4); + const __m128i dc = _mm_add_epi16(T0, four); + const __m128i a = _mm_add_epi16(dc, T2); + const __m128i b = _mm_sub_epi16(dc, T2); + // c = MUL(T1, K2) - MUL(T3, K1) = MUL(T1, k2) - MUL(T3, k1) + T1 - T3 + const __m128i c1 = _mm_mulhi_epi16(T1, k2); + const __m128i c2 = _mm_mulhi_epi16(T3, k1); + const __m128i c3 = _mm_sub_epi16(T1, T3); + const __m128i c4 = _mm_sub_epi16(c1, c2); + const __m128i c = _mm_add_epi16(c3, c4); + // d = MUL(T1, K1) + MUL(T3, K2) = MUL(T1, k1) + MUL(T3, k2) + T1 + T3 + const __m128i d1 = _mm_mulhi_epi16(T1, k1); + const __m128i d2 = _mm_mulhi_epi16(T3, k2); + const __m128i d3 = _mm_add_epi16(T1, T3); + const __m128i d4 = _mm_add_epi16(d1, d2); + const __m128i d = _mm_add_epi16(d3, d4); + + // Second pass. + const __m128i tmp0 = _mm_add_epi16(a, d); + const __m128i tmp1 = _mm_add_epi16(b, c); + const __m128i tmp2 = _mm_sub_epi16(b, c); + const __m128i tmp3 = _mm_sub_epi16(a, d); + const __m128i shifted0 = _mm_srai_epi16(tmp0, 3); + const __m128i shifted1 = _mm_srai_epi16(tmp1, 3); + const __m128i shifted2 = _mm_srai_epi16(tmp2, 3); + const __m128i shifted3 = _mm_srai_epi16(tmp3, 3); + + // Transpose the two 4x4. + // a00 a01 a02 a03 b00 b01 b02 b03 + // a10 a11 a12 a13 b10 b11 b12 b13 + // a20 a21 a22 a23 b20 b21 b22 b23 + // a30 a31 a32 a33 b30 b31 b32 b33 + const __m128i transpose0_0 = _mm_unpacklo_epi16(shifted0, shifted1); + const __m128i transpose0_1 = _mm_unpacklo_epi16(shifted2, shifted3); + const __m128i transpose0_2 = _mm_unpackhi_epi16(shifted0, shifted1); + const __m128i transpose0_3 = _mm_unpackhi_epi16(shifted2, shifted3); + // a00 a10 a01 a11 a02 a12 a03 a13 + // a20 a30 a21 a31 a22 a32 a23 a33 + // b00 b10 b01 b11 b02 b12 b03 b13 + // b20 b30 b21 b31 b22 b32 b23 b33 + const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3); + const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3); + // a00 a10 a20 a30 a01 a11 a21 a31 + // b00 b10 b20 b30 b01 b11 b21 b31 + // a02 a12 a22 a32 a03 a13 a23 a33 + // b02 b12 a22 b32 b03 b13 b23 b33 + T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); + T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); + T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); + T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3); + // a00 a10 a20 a30 b00 b10 b20 b30 + // a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 + // a03 a13 a23 a33 b03 b13 b23 b33 + } + + // Add inverse transform to 'ref' and store. + { + const __m128i zero = _mm_set1_epi16(0); + // Load the reference(s). + __m128i ref0, ref1, ref2, ref3; + if (do_two) { + // Load eight bytes/pixels per line. + ref0 = _mm_loadl_epi64((__m128i*)&ref[0 * BPS]); + ref1 = _mm_loadl_epi64((__m128i*)&ref[1 * BPS]); + ref2 = _mm_loadl_epi64((__m128i*)&ref[2 * BPS]); + ref3 = _mm_loadl_epi64((__m128i*)&ref[3 * BPS]); + } else { + // Load four bytes/pixels per line. + ref0 = _mm_cvtsi32_si128(*(int*)&ref[0 * BPS]); + ref1 = _mm_cvtsi32_si128(*(int*)&ref[1 * BPS]); + ref2 = _mm_cvtsi32_si128(*(int*)&ref[2 * BPS]); + ref3 = _mm_cvtsi32_si128(*(int*)&ref[3 * BPS]); + } + // Convert to 16b. + ref0 = _mm_unpacklo_epi8(ref0, zero); + ref1 = _mm_unpacklo_epi8(ref1, zero); + ref2 = _mm_unpacklo_epi8(ref2, zero); + ref3 = _mm_unpacklo_epi8(ref3, zero); + // Add the inverse transform(s). + ref0 = _mm_add_epi16(ref0, T0); + ref1 = _mm_add_epi16(ref1, T1); + ref2 = _mm_add_epi16(ref2, T2); + ref3 = _mm_add_epi16(ref3, T3); + // Unsigned saturate to 8b. + ref0 = _mm_packus_epi16(ref0, ref0); + ref1 = _mm_packus_epi16(ref1, ref1); + ref2 = _mm_packus_epi16(ref2, ref2); + ref3 = _mm_packus_epi16(ref3, ref3); + // Store the results. + if (do_two) { + // Store eight bytes/pixels per line. + _mm_storel_epi64((__m128i*)&dst[0 * BPS], ref0); + _mm_storel_epi64((__m128i*)&dst[1 * BPS], ref1); + _mm_storel_epi64((__m128i*)&dst[2 * BPS], ref2); + _mm_storel_epi64((__m128i*)&dst[3 * BPS], ref3); + } else { + // Store four bytes/pixels per line. + *((int32_t *)&dst[0 * BPS]) = _mm_cvtsi128_si32(ref0); + *((int32_t *)&dst[1 * BPS]) = _mm_cvtsi128_si32(ref1); + *((int32_t *)&dst[2 * BPS]) = _mm_cvtsi128_si32(ref2); + *((int32_t *)&dst[3 * BPS]) = _mm_cvtsi128_si32(ref3); + } + } +} + +static void FTransformSSE2(const uint8_t* src, const uint8_t* ref, + int16_t* out) { + const __m128i zero = _mm_setzero_si128(); + const __m128i seven = _mm_set1_epi16(7); + const __m128i k7500 = _mm_set1_epi32(7500); + const __m128i k14500 = _mm_set1_epi32(14500); + const __m128i k51000 = _mm_set1_epi32(51000); + const __m128i k12000_plus_one = _mm_set1_epi32(12000 + (1 << 16)); + const __m128i k5352_2217 = _mm_set_epi16(5352, 2217, 5352, 2217, + 5352, 2217, 5352, 2217); + const __m128i k2217_5352 = _mm_set_epi16(2217, -5352, 2217, -5352, + 2217, -5352, 2217, -5352); + + __m128i v01, v32; + + // Difference between src and ref and initial transpose. + { + // Load src and convert to 16b. + const __m128i src0 = _mm_loadl_epi64((__m128i*)&src[0 * BPS]); + const __m128i src1 = _mm_loadl_epi64((__m128i*)&src[1 * BPS]); + const __m128i src2 = _mm_loadl_epi64((__m128i*)&src[2 * BPS]); + const __m128i src3 = _mm_loadl_epi64((__m128i*)&src[3 * BPS]); + const __m128i src_0 = _mm_unpacklo_epi8(src0, zero); + const __m128i src_1 = _mm_unpacklo_epi8(src1, zero); + const __m128i src_2 = _mm_unpacklo_epi8(src2, zero); + const __m128i src_3 = _mm_unpacklo_epi8(src3, zero); + // Load ref and convert to 16b. + const __m128i ref0 = _mm_loadl_epi64((__m128i*)&ref[0 * BPS]); + const __m128i ref1 = _mm_loadl_epi64((__m128i*)&ref[1 * BPS]); + const __m128i ref2 = _mm_loadl_epi64((__m128i*)&ref[2 * BPS]); + const __m128i ref3 = _mm_loadl_epi64((__m128i*)&ref[3 * BPS]); + const __m128i ref_0 = _mm_unpacklo_epi8(ref0, zero); + const __m128i ref_1 = _mm_unpacklo_epi8(ref1, zero); + const __m128i ref_2 = _mm_unpacklo_epi8(ref2, zero); + const __m128i ref_3 = _mm_unpacklo_epi8(ref3, zero); + // Compute difference. + const __m128i diff0 = _mm_sub_epi16(src_0, ref_0); + const __m128i diff1 = _mm_sub_epi16(src_1, ref_1); + const __m128i diff2 = _mm_sub_epi16(src_2, ref_2); + const __m128i diff3 = _mm_sub_epi16(src_3, ref_3); + + // Transpose. + // 00 01 02 03 0 0 0 0 + // 10 11 12 13 0 0 0 0 + // 20 21 22 23 0 0 0 0 + // 30 31 32 33 0 0 0 0 + const __m128i transpose0_0 = _mm_unpacklo_epi16(diff0, diff1); + const __m128i transpose0_1 = _mm_unpacklo_epi16(diff2, diff3); + // 00 10 01 11 02 12 03 13 + // 20 30 21 31 22 32 23 33 + const __m128i v23 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); + v01 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); + v32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); + // a02 a12 a22 a32 a03 a13 a23 a33 + // a00 a10 a20 a30 a01 a11 a21 a31 + // a03 a13 a23 a33 a02 a12 a22 a32 + } + + // First pass and subsequent transpose. + { + // Same operations are done on the (0,3) and (1,2) pairs. + // b0 = (a0 + a3) << 3 + // b1 = (a1 + a2) << 3 + // b3 = (a0 - a3) << 3 + // b2 = (a1 - a2) << 3 + const __m128i a01 = _mm_add_epi16(v01, v32); + const __m128i a32 = _mm_sub_epi16(v01, v32); + const __m128i b01 = _mm_slli_epi16(a01, 3); + const __m128i b32 = _mm_slli_epi16(a32, 3); + const __m128i b11 = _mm_unpackhi_epi64(b01, b01); + const __m128i b22 = _mm_unpackhi_epi64(b32, b32); + + // e0 = b0 + b1 + // e2 = b0 - b1 + const __m128i e0 = _mm_add_epi16(b01, b11); + const __m128i e2 = _mm_sub_epi16(b01, b11); + const __m128i e02 = _mm_unpacklo_epi64(e0, e2); + + // e1 = (b3 * 5352 + b2 * 2217 + 14500) >> 12 + // e3 = (b3 * 2217 - b2 * 5352 + 7500) >> 12 + const __m128i b23 = _mm_unpacklo_epi16(b22, b32); + const __m128i c1 = _mm_madd_epi16(b23, k5352_2217); + const __m128i c3 = _mm_madd_epi16(b23, k2217_5352); + const __m128i d1 = _mm_add_epi32(c1, k14500); + const __m128i d3 = _mm_add_epi32(c3, k7500); + const __m128i e1 = _mm_srai_epi32(d1, 12); + const __m128i e3 = _mm_srai_epi32(d3, 12); + const __m128i e13 = _mm_packs_epi32(e1, e3); + + // Transpose. + // 00 01 02 03 20 21 22 23 + // 10 11 12 13 30 31 32 33 + const __m128i transpose0_0 = _mm_unpacklo_epi16(e02, e13); + const __m128i transpose0_1 = _mm_unpackhi_epi16(e02, e13); + // 00 10 01 11 02 12 03 13 + // 20 30 21 31 22 32 23 33 + const __m128i v23 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); + v01 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); + v32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); + // 02 12 22 32 03 13 23 33 + // 00 10 20 30 01 11 21 31 + // 03 13 23 33 02 12 22 32 + } + + // Second pass + { + // Same operations are done on the (0,3) and (1,2) pairs. + // a0 = v0 + v3 + // a1 = v1 + v2 + // a3 = v0 - v3 + // a2 = v1 - v2 + const __m128i a01 = _mm_add_epi16(v01, v32); + const __m128i a32 = _mm_sub_epi16(v01, v32); + const __m128i a11 = _mm_unpackhi_epi64(a01, a01); + const __m128i a22 = _mm_unpackhi_epi64(a32, a32); + + // d0 = (a0 + a1 + 7) >> 4; + // d2 = (a0 - a1 + 7) >> 4; + const __m128i b0 = _mm_add_epi16(a01, a11); + const __m128i b2 = _mm_sub_epi16(a01, a11); + const __m128i c0 = _mm_add_epi16(b0, seven); + const __m128i c2 = _mm_add_epi16(b2, seven); + const __m128i d0 = _mm_srai_epi16(c0, 4); + const __m128i d2 = _mm_srai_epi16(c2, 4); + + // f1 = ((b3 * 5352 + b2 * 2217 + 12000) >> 16) + // f3 = ((b3 * 2217 - b2 * 5352 + 51000) >> 16) + const __m128i b23 = _mm_unpacklo_epi16(a22, a32); + const __m128i c1 = _mm_madd_epi16(b23, k5352_2217); + const __m128i c3 = _mm_madd_epi16(b23, k2217_5352); + const __m128i d1 = _mm_add_epi32(c1, k12000_plus_one); + const __m128i d3 = _mm_add_epi32(c3, k51000); + const __m128i e1 = _mm_srai_epi32(d1, 16); + const __m128i e3 = _mm_srai_epi32(d3, 16); + const __m128i f1 = _mm_packs_epi32(e1, e1); + const __m128i f3 = _mm_packs_epi32(e3, e3); + // f1 = f1 + (a3 != 0); + // The compare will return (0xffff, 0) for (==0, !=0). To turn that into the + // desired (0, 1), we add one earlier through k12000_plus_one. + const __m128i g1 = _mm_add_epi16(f1, _mm_cmpeq_epi16(a32, zero)); + + _mm_storel_epi64((__m128i*)&out[ 0], d0); + _mm_storel_epi64((__m128i*)&out[ 4], g1); + _mm_storel_epi64((__m128i*)&out[ 8], d2); + _mm_storel_epi64((__m128i*)&out[12], f3); + } +} + +//------------------------------------------------------------------------------ +// Metric + +static int SSE4x4SSE2(const uint8_t* a, const uint8_t* b) { + const __m128i zero = _mm_set1_epi16(0); + + // Load values. + const __m128i a0 = _mm_loadl_epi64((__m128i*)&a[BPS * 0]); + const __m128i a1 = _mm_loadl_epi64((__m128i*)&a[BPS * 1]); + const __m128i a2 = _mm_loadl_epi64((__m128i*)&a[BPS * 2]); + const __m128i a3 = _mm_loadl_epi64((__m128i*)&a[BPS * 3]); + const __m128i b0 = _mm_loadl_epi64((__m128i*)&b[BPS * 0]); + const __m128i b1 = _mm_loadl_epi64((__m128i*)&b[BPS * 1]); + const __m128i b2 = _mm_loadl_epi64((__m128i*)&b[BPS * 2]); + const __m128i b3 = _mm_loadl_epi64((__m128i*)&b[BPS * 3]); + + // Combine pair of lines and convert to 16b. + const __m128i a01 = _mm_unpacklo_epi32(a0, a1); + const __m128i a23 = _mm_unpacklo_epi32(a2, a3); + const __m128i b01 = _mm_unpacklo_epi32(b0, b1); + const __m128i b23 = _mm_unpacklo_epi32(b2, b3); + const __m128i a01s = _mm_unpacklo_epi8(a01, zero); + const __m128i a23s = _mm_unpacklo_epi8(a23, zero); + const __m128i b01s = _mm_unpacklo_epi8(b01, zero); + const __m128i b23s = _mm_unpacklo_epi8(b23, zero); + + // Compute differences; (a-b)^2 = (abs(a-b))^2 = (sat8(a-b) + sat8(b-a))^2 + // TODO(cduvivier): Dissassemble and figure out why this is fastest. We don't + // need absolute values, there is no need to do calculation + // in 8bit as we are already in 16bit, ... Yet this is what + // benchmarks the fastest! + const __m128i d0 = _mm_subs_epu8(a01s, b01s); + const __m128i d1 = _mm_subs_epu8(b01s, a01s); + const __m128i d2 = _mm_subs_epu8(a23s, b23s); + const __m128i d3 = _mm_subs_epu8(b23s, a23s); + + // Square and add them all together. + const __m128i madd0 = _mm_madd_epi16(d0, d0); + const __m128i madd1 = _mm_madd_epi16(d1, d1); + const __m128i madd2 = _mm_madd_epi16(d2, d2); + const __m128i madd3 = _mm_madd_epi16(d3, d3); + const __m128i sum0 = _mm_add_epi32(madd0, madd1); + const __m128i sum1 = _mm_add_epi32(madd2, madd3); + const __m128i sum2 = _mm_add_epi32(sum0, sum1); + int32_t tmp[4]; + _mm_storeu_si128((__m128i*)tmp, sum2); + return (tmp[3] + tmp[2] + tmp[1] + tmp[0]); +} + +//------------------------------------------------------------------------------ +// Texture distortion +// +// We try to match the spectral content (weighted) between source and +// reconstructed samples. + +// Hadamard transform +// Returns the difference between the weighted sum of the absolute value of +// transformed coefficients. +static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, + const uint16_t* const w) { + int32_t sum[4]; + __m128i tmp_0, tmp_1, tmp_2, tmp_3; + const __m128i zero = _mm_setzero_si128(); + const __m128i one = _mm_set1_epi16(1); + const __m128i three = _mm_set1_epi16(3); + + // Load, combine and tranpose inputs. + { + const __m128i inA_0 = _mm_loadl_epi64((__m128i*)&inA[BPS * 0]); + const __m128i inA_1 = _mm_loadl_epi64((__m128i*)&inA[BPS * 1]); + const __m128i inA_2 = _mm_loadl_epi64((__m128i*)&inA[BPS * 2]); + const __m128i inA_3 = _mm_loadl_epi64((__m128i*)&inA[BPS * 3]); + const __m128i inB_0 = _mm_loadl_epi64((__m128i*)&inB[BPS * 0]); + const __m128i inB_1 = _mm_loadl_epi64((__m128i*)&inB[BPS * 1]); + const __m128i inB_2 = _mm_loadl_epi64((__m128i*)&inB[BPS * 2]); + const __m128i inB_3 = _mm_loadl_epi64((__m128i*)&inB[BPS * 3]); + + // Combine inA and inB (we'll do two transforms in parallel). + const __m128i inAB_0 = _mm_unpacklo_epi8(inA_0, inB_0); + const __m128i inAB_1 = _mm_unpacklo_epi8(inA_1, inB_1); + const __m128i inAB_2 = _mm_unpacklo_epi8(inA_2, inB_2); + const __m128i inAB_3 = _mm_unpacklo_epi8(inA_3, inB_3); + // a00 b00 a01 b01 a02 b03 a03 b03 0 0 0 0 0 0 0 0 + // a10 b10 a11 b11 a12 b12 a13 b13 0 0 0 0 0 0 0 0 + // a20 b20 a21 b21 a22 b22 a23 b23 0 0 0 0 0 0 0 0 + // a30 b30 a31 b31 a32 b32 a33 b33 0 0 0 0 0 0 0 0 + + // Transpose the two 4x4, discarding the filling zeroes. + const __m128i transpose0_0 = _mm_unpacklo_epi8(inAB_0, inAB_2); + const __m128i transpose0_1 = _mm_unpacklo_epi8(inAB_1, inAB_3); + // a00 a20 b00 b20 a01 a21 b01 b21 a02 a22 b02 b22 a03 a23 b03 b23 + // a10 a30 b10 b30 a11 a31 b11 b31 a12 a32 b12 b32 a13 a33 b13 b33 + const __m128i transpose1_0 = _mm_unpacklo_epi8(transpose0_0, transpose0_1); + const __m128i transpose1_1 = _mm_unpackhi_epi8(transpose0_0, transpose0_1); + // a00 a10 a20 a30 b00 b10 b20 b30 a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 a03 a13 a23 a33 b03 b13 b23 b33 + + // Convert to 16b. + tmp_0 = _mm_unpacklo_epi8(transpose1_0, zero); + tmp_1 = _mm_unpackhi_epi8(transpose1_0, zero); + tmp_2 = _mm_unpacklo_epi8(transpose1_1, zero); + tmp_3 = _mm_unpackhi_epi8(transpose1_1, zero); + // a00 a10 a20 a30 b00 b10 b20 b30 + // a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 + // a03 a13 a23 a33 b03 b13 b23 b33 + } + + // Horizontal pass and subsequent transpose. + { + // Calculate a and b (two 4x4 at once). + const __m128i a0 = _mm_slli_epi16(_mm_add_epi16(tmp_0, tmp_2), 2); + const __m128i a1 = _mm_slli_epi16(_mm_add_epi16(tmp_1, tmp_3), 2); + const __m128i a2 = _mm_slli_epi16(_mm_sub_epi16(tmp_1, tmp_3), 2); + const __m128i a3 = _mm_slli_epi16(_mm_sub_epi16(tmp_0, tmp_2), 2); + // b0_extra = (a0 != 0); + const __m128i b0_extra = _mm_andnot_si128(_mm_cmpeq_epi16 (a0, zero), one); + const __m128i b0_base = _mm_add_epi16(a0, a1); + const __m128i b1 = _mm_add_epi16(a3, a2); + const __m128i b2 = _mm_sub_epi16(a3, a2); + const __m128i b3 = _mm_sub_epi16(a0, a1); + const __m128i b0 = _mm_add_epi16(b0_base, b0_extra); + // a00 a01 a02 a03 b00 b01 b02 b03 + // a10 a11 a12 a13 b10 b11 b12 b13 + // a20 a21 a22 a23 b20 b21 b22 b23 + // a30 a31 a32 a33 b30 b31 b32 b33 + + // Transpose the two 4x4. + const __m128i transpose0_0 = _mm_unpacklo_epi16(b0, b1); + const __m128i transpose0_1 = _mm_unpacklo_epi16(b2, b3); + const __m128i transpose0_2 = _mm_unpackhi_epi16(b0, b1); + const __m128i transpose0_3 = _mm_unpackhi_epi16(b2, b3); + // a00 a10 a01 a11 a02 a12 a03 a13 + // a20 a30 a21 a31 a22 a32 a23 a33 + // b00 b10 b01 b11 b02 b12 b03 b13 + // b20 b30 b21 b31 b22 b32 b23 b33 + const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3); + const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); + const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3); + // a00 a10 a20 a30 a01 a11 a21 a31 + // b00 b10 b20 b30 b01 b11 b21 b31 + // a02 a12 a22 a32 a03 a13 a23 a33 + // b02 b12 a22 b32 b03 b13 b23 b33 + tmp_0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); + tmp_1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); + tmp_2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); + tmp_3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3); + // a00 a10 a20 a30 b00 b10 b20 b30 + // a01 a11 a21 a31 b01 b11 b21 b31 + // a02 a12 a22 a32 b02 b12 b22 b32 + // a03 a13 a23 a33 b03 b13 b23 b33 + } + + // Vertical pass and difference of weighted sums. + { + // Load all inputs. + // TODO(cduvivier): Make variable declarations and allocations aligned so + // we can use _mm_load_si128 instead of _mm_loadu_si128. + const __m128i w_0 = _mm_loadu_si128((__m128i*)&w[0]); + const __m128i w_8 = _mm_loadu_si128((__m128i*)&w[8]); + + // Calculate a and b (two 4x4 at once). + const __m128i a0 = _mm_add_epi16(tmp_0, tmp_2); + const __m128i a1 = _mm_add_epi16(tmp_1, tmp_3); + const __m128i a2 = _mm_sub_epi16(tmp_1, tmp_3); + const __m128i a3 = _mm_sub_epi16(tmp_0, tmp_2); + const __m128i b0 = _mm_add_epi16(a0, a1); + const __m128i b1 = _mm_add_epi16(a3, a2); + const __m128i b2 = _mm_sub_epi16(a3, a2); + const __m128i b3 = _mm_sub_epi16(a0, a1); + + // Separate the transforms of inA and inB. + __m128i A_b0 = _mm_unpacklo_epi64(b0, b1); + __m128i A_b2 = _mm_unpacklo_epi64(b2, b3); + __m128i B_b0 = _mm_unpackhi_epi64(b0, b1); + __m128i B_b2 = _mm_unpackhi_epi64(b2, b3); + + { + // sign(b) = b >> 15 (0x0000 if positive, 0xffff if negative) + const __m128i sign_A_b0 = _mm_srai_epi16(A_b0, 15); + const __m128i sign_A_b2 = _mm_srai_epi16(A_b2, 15); + const __m128i sign_B_b0 = _mm_srai_epi16(B_b0, 15); + const __m128i sign_B_b2 = _mm_srai_epi16(B_b2, 15); + + // b = abs(b) = (b ^ sign) - sign + A_b0 = _mm_xor_si128(A_b0, sign_A_b0); + A_b2 = _mm_xor_si128(A_b2, sign_A_b2); + B_b0 = _mm_xor_si128(B_b0, sign_B_b0); + B_b2 = _mm_xor_si128(B_b2, sign_B_b2); + A_b0 = _mm_sub_epi16(A_b0, sign_A_b0); + A_b2 = _mm_sub_epi16(A_b2, sign_A_b2); + B_b0 = _mm_sub_epi16(B_b0, sign_B_b0); + B_b2 = _mm_sub_epi16(B_b2, sign_B_b2); + } + + // b = abs(b) + 3 + A_b0 = _mm_add_epi16(A_b0, three); + A_b2 = _mm_add_epi16(A_b2, three); + B_b0 = _mm_add_epi16(B_b0, three); + B_b2 = _mm_add_epi16(B_b2, three); + + // abs((b + (b<0) + 3) >> 3) = (abs(b) + 3) >> 3 + // b = (abs(b) + 3) >> 3 + A_b0 = _mm_srai_epi16(A_b0, 3); + A_b2 = _mm_srai_epi16(A_b2, 3); + B_b0 = _mm_srai_epi16(B_b0, 3); + B_b2 = _mm_srai_epi16(B_b2, 3); + + // weighted sums + A_b0 = _mm_madd_epi16(A_b0, w_0); + A_b2 = _mm_madd_epi16(A_b2, w_8); + B_b0 = _mm_madd_epi16(B_b0, w_0); + B_b2 = _mm_madd_epi16(B_b2, w_8); + A_b0 = _mm_add_epi32(A_b0, A_b2); + B_b0 = _mm_add_epi32(B_b0, B_b2); + + // difference of weighted sums + A_b0 = _mm_sub_epi32(A_b0, B_b0); + _mm_storeu_si128((__m128i*)&sum[0], A_b0); + } + return sum[0] + sum[1] + sum[2] + sum[3]; +} + +static int Disto4x4SSE2(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + const int diff_sum = TTransformSSE2(a, b, w); + return (abs(diff_sum) + 8) >> 4; +} + +static int Disto16x16SSE2(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + int D = 0; + int x, y; + for (y = 0; y < 16 * BPS; y += 4 * BPS) { + for (x = 0; x < 16; x += 4) { + D += Disto4x4SSE2(a + x + y, b + x + y, w); + } + } + return D; +} + + +//------------------------------------------------------------------------------ +// Quantization +// + +// Simple quantization +static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], + int n, const VP8Matrix* const mtx) { + const __m128i max_coeff_2047 = _mm_set1_epi16(2047); + const __m128i zero = _mm_set1_epi16(0); + __m128i sign0, sign8; + __m128i coeff0, coeff8; + __m128i out0, out8; + __m128i packed_out; + + // Load all inputs. + // TODO(cduvivier): Make variable declarations and allocations aligned so that + // we can use _mm_load_si128 instead of _mm_loadu_si128. + __m128i in0 = _mm_loadu_si128((__m128i*)&in[0]); + __m128i in8 = _mm_loadu_si128((__m128i*)&in[8]); + const __m128i sharpen0 = _mm_loadu_si128((__m128i*)&mtx->sharpen_[0]); + const __m128i sharpen8 = _mm_loadu_si128((__m128i*)&mtx->sharpen_[8]); + const __m128i iq0 = _mm_loadu_si128((__m128i*)&mtx->iq_[0]); + const __m128i iq8 = _mm_loadu_si128((__m128i*)&mtx->iq_[8]); + const __m128i bias0 = _mm_loadu_si128((__m128i*)&mtx->bias_[0]); + const __m128i bias8 = _mm_loadu_si128((__m128i*)&mtx->bias_[8]); + const __m128i q0 = _mm_loadu_si128((__m128i*)&mtx->q_[0]); + const __m128i q8 = _mm_loadu_si128((__m128i*)&mtx->q_[8]); + const __m128i zthresh0 = _mm_loadu_si128((__m128i*)&mtx->zthresh_[0]); + const __m128i zthresh8 = _mm_loadu_si128((__m128i*)&mtx->zthresh_[8]); + + // sign(in) = in >> 15 (0x0000 if positive, 0xffff if negative) + sign0 = _mm_srai_epi16(in0, 15); + sign8 = _mm_srai_epi16(in8, 15); + + // coeff = abs(in) = (in ^ sign) - sign + coeff0 = _mm_xor_si128(in0, sign0); + coeff8 = _mm_xor_si128(in8, sign8); + coeff0 = _mm_sub_epi16(coeff0, sign0); + coeff8 = _mm_sub_epi16(coeff8, sign8); + + // coeff = abs(in) + sharpen + coeff0 = _mm_add_epi16(coeff0, sharpen0); + coeff8 = _mm_add_epi16(coeff8, sharpen8); + + // if (coeff > 2047) coeff = 2047 + coeff0 = _mm_min_epi16(coeff0, max_coeff_2047); + coeff8 = _mm_min_epi16(coeff8, max_coeff_2047); + + // out = (coeff * iQ + B) >> QFIX; + { + // doing calculations with 32b precision (QFIX=17) + // out = (coeff * iQ) + __m128i coeff_iQ0H = _mm_mulhi_epu16(coeff0, iq0); + __m128i coeff_iQ0L = _mm_mullo_epi16(coeff0, iq0); + __m128i coeff_iQ8H = _mm_mulhi_epu16(coeff8, iq8); + __m128i coeff_iQ8L = _mm_mullo_epi16(coeff8, iq8); + __m128i out_00 = _mm_unpacklo_epi16(coeff_iQ0L, coeff_iQ0H); + __m128i out_04 = _mm_unpackhi_epi16(coeff_iQ0L, coeff_iQ0H); + __m128i out_08 = _mm_unpacklo_epi16(coeff_iQ8L, coeff_iQ8H); + __m128i out_12 = _mm_unpackhi_epi16(coeff_iQ8L, coeff_iQ8H); + // expand bias from 16b to 32b + __m128i bias_00 = _mm_unpacklo_epi16(bias0, zero); + __m128i bias_04 = _mm_unpackhi_epi16(bias0, zero); + __m128i bias_08 = _mm_unpacklo_epi16(bias8, zero); + __m128i bias_12 = _mm_unpackhi_epi16(bias8, zero); + // out = (coeff * iQ + B) + out_00 = _mm_add_epi32(out_00, bias_00); + out_04 = _mm_add_epi32(out_04, bias_04); + out_08 = _mm_add_epi32(out_08, bias_08); + out_12 = _mm_add_epi32(out_12, bias_12); + // out = (coeff * iQ + B) >> QFIX; + out_00 = _mm_srai_epi32(out_00, QFIX); + out_04 = _mm_srai_epi32(out_04, QFIX); + out_08 = _mm_srai_epi32(out_08, QFIX); + out_12 = _mm_srai_epi32(out_12, QFIX); + // pack result as 16b + out0 = _mm_packs_epi32(out_00, out_04); + out8 = _mm_packs_epi32(out_08, out_12); + } + + // get sign back (if (sign[j]) out_n = -out_n) + out0 = _mm_xor_si128(out0, sign0); + out8 = _mm_xor_si128(out8, sign8); + out0 = _mm_sub_epi16(out0, sign0); + out8 = _mm_sub_epi16(out8, sign8); + + // in = out * Q + in0 = _mm_mullo_epi16(out0, q0); + in8 = _mm_mullo_epi16(out8, q8); + + // if (coeff <= mtx->zthresh_) {in=0; out=0;} + { + __m128i cmp0 = _mm_cmpgt_epi16(coeff0, zthresh0); + __m128i cmp8 = _mm_cmpgt_epi16(coeff8, zthresh8); + in0 = _mm_and_si128(in0, cmp0); + in8 = _mm_and_si128(in8, cmp8); + _mm_storeu_si128((__m128i*)&in[0], in0); + _mm_storeu_si128((__m128i*)&in[8], in8); + out0 = _mm_and_si128(out0, cmp0); + out8 = _mm_and_si128(out8, cmp8); + } + + // zigzag the output before storing it. + // + // The zigzag pattern can almost be reproduced with a small sequence of + // shuffles. After it, we only need to swap the 7th (ending up in third + // position instead of twelfth) and 8th values. + { + __m128i outZ0, outZ8; + outZ0 = _mm_shufflehi_epi16(out0, _MM_SHUFFLE(2, 1, 3, 0)); + outZ0 = _mm_shuffle_epi32 (outZ0, _MM_SHUFFLE(3, 1, 2, 0)); + outZ0 = _mm_shufflehi_epi16(outZ0, _MM_SHUFFLE(3, 1, 0, 2)); + outZ8 = _mm_shufflelo_epi16(out8, _MM_SHUFFLE(3, 0, 2, 1)); + outZ8 = _mm_shuffle_epi32 (outZ8, _MM_SHUFFLE(3, 1, 2, 0)); + outZ8 = _mm_shufflelo_epi16(outZ8, _MM_SHUFFLE(1, 3, 2, 0)); + _mm_storeu_si128((__m128i*)&out[0], outZ0); + _mm_storeu_si128((__m128i*)&out[8], outZ8); + packed_out = _mm_packs_epi16(outZ0, outZ8); + } + { + const int16_t outZ_12 = out[12]; + const int16_t outZ_3 = out[3]; + out[3] = outZ_12; + out[12] = outZ_3; + } + + // detect if all 'out' values are zeroes or not + { + int32_t tmp[4]; + _mm_storeu_si128((__m128i*)tmp, packed_out); + if (n) { + tmp[0] &= ~0xff; + } + return (tmp[3] || tmp[2] || tmp[1] || tmp[0]); + } +} + +extern void VP8EncDspInitSSE2(void); +void VP8EncDspInitSSE2(void) { + VP8CollectHistogram = CollectHistogramSSE2; + VP8EncQuantizeBlock = QuantizeBlockSSE2; + VP8ITransform = ITransformSSE2; + VP8FTransform = FTransformSSE2; + VP8SSE4x4 = SSE4x4SSE2; + VP8TDisto4x4 = Disto4x4SSE2; + VP8TDisto16x16 = Disto16x16SSE2; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif // WEBP_USE_SSE2 diff --git a/drivers/webpold/dsp/lossless.c b/drivers/webpold/dsp/lossless.c new file mode 100644 index 0000000000..62a6b7b15a --- /dev/null +++ b/drivers/webpold/dsp/lossless.c @@ -0,0 +1,1138 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Image transforms and color space conversion methods for lossless decoder. +// +// Authors: Vikas Arora (vikaas.arora@gmail.com) +// Jyrki Alakuijala (jyrki@google.com) +// Urvang Joshi (urvang@google.com) + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#include <math.h> +#include <stdlib.h> +#include "./lossless.h" +#include "../dec/vp8li.h" +#include "../dsp/yuv.h" +#include "../dsp/dsp.h" +#include "../enc/histogram.h" + +#define MAX_DIFF_COST (1e30f) + +// lookup table for small values of log2(int) +#define APPROX_LOG_MAX 4096 +#define LOG_2_RECIPROCAL 1.44269504088896338700465094007086 +#define LOG_LOOKUP_IDX_MAX 256 +static const float kLog2Table[LOG_LOOKUP_IDX_MAX] = { + 0.0000000000000000f, 0.0000000000000000f, + 1.0000000000000000f, 1.5849625007211560f, + 2.0000000000000000f, 2.3219280948873621f, + 2.5849625007211560f, 2.8073549220576041f, + 3.0000000000000000f, 3.1699250014423121f, + 3.3219280948873621f, 3.4594316186372973f, + 3.5849625007211560f, 3.7004397181410921f, + 3.8073549220576041f, 3.9068905956085187f, + 4.0000000000000000f, 4.0874628412503390f, + 4.1699250014423121f, 4.2479275134435852f, + 4.3219280948873626f, 4.3923174227787606f, + 4.4594316186372973f, 4.5235619560570130f, + 4.5849625007211560f, 4.6438561897747243f, + 4.7004397181410917f, 4.7548875021634682f, + 4.8073549220576037f, 4.8579809951275718f, + 4.9068905956085187f, 4.9541963103868749f, + 5.0000000000000000f, 5.0443941193584533f, + 5.0874628412503390f, 5.1292830169449663f, + 5.1699250014423121f, 5.2094533656289501f, + 5.2479275134435852f, 5.2854022188622487f, + 5.3219280948873626f, 5.3575520046180837f, + 5.3923174227787606f, 5.4262647547020979f, + 5.4594316186372973f, 5.4918530963296747f, + 5.5235619560570130f, 5.5545888516776376f, + 5.5849625007211560f, 5.6147098441152083f, + 5.6438561897747243f, 5.6724253419714951f, + 5.7004397181410917f, 5.7279204545631987f, + 5.7548875021634682f, 5.7813597135246599f, + 5.8073549220576037f, 5.8328900141647412f, + 5.8579809951275718f, 5.8826430493618415f, + 5.9068905956085187f, 5.9307373375628866f, + 5.9541963103868749f, 5.9772799234999167f, + 6.0000000000000000f, 6.0223678130284543f, + 6.0443941193584533f, 6.0660891904577720f, + 6.0874628412503390f, 6.1085244567781691f, + 6.1292830169449663f, 6.1497471195046822f, + 6.1699250014423121f, 6.1898245588800175f, + 6.2094533656289501f, 6.2288186904958804f, + 6.2479275134435852f, 6.2667865406949010f, + 6.2854022188622487f, 6.3037807481771030f, + 6.3219280948873626f, 6.3398500028846243f, + 6.3575520046180837f, 6.3750394313469245f, + 6.3923174227787606f, 6.4093909361377017f, + 6.4262647547020979f, 6.4429434958487279f, + 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7.4757334309663976f, 7.4838157772642563f, + 7.4918530963296747f, 7.4998458870832056f, + 7.5077946401986963f, 7.5156998382840427f, + 7.5235619560570130f, 7.5313814605163118f, + 7.5391588111080309f, 7.5468944598876364f, + 7.5545888516776376f, 7.5622424242210728f, + 7.5698556083309478f, 7.5774288280357486f, + 7.5849625007211560f, 7.5924570372680806f, + 7.5999128421871278f, 7.6073303137496104f, + 7.6147098441152083f, 7.6220518194563764f, + 7.6293566200796094f, 7.6366246205436487f, + 7.6438561897747243f, 7.6510516911789281f, + 7.6582114827517946f, 7.6653359171851764f, + 7.6724253419714951f, 7.6794800995054464f, + 7.6865005271832185f, 7.6934869574993252f, + 7.7004397181410917f, 7.7073591320808825f, + 7.7142455176661224f, 7.7210991887071855f, + 7.7279204545631987f, 7.7347096202258383f, + 7.7414669864011464f, 7.7481928495894605f, + 7.7548875021634682f, 7.7615512324444795f, + 7.7681843247769259f, 7.7747870596011736f, + 7.7813597135246599f, 7.7879025593914317f, + 7.7944158663501061f, 7.8008998999203047f, + 7.8073549220576037f, 7.8137811912170374f, + 7.8201789624151878f, 7.8265484872909150f, + 7.8328900141647412f, 7.8392037880969436f, + 7.8454900509443747f, 7.8517490414160571f, + 7.8579809951275718f, 7.8641861446542797f, + 7.8703647195834047f, 7.8765169465649993f, + 7.8826430493618415f, 7.8887432488982591f, + 7.8948177633079437f, 7.9008668079807486f, + 7.9068905956085187f, 7.9128893362299619f, + 7.9188632372745946f, 7.9248125036057812f, + 7.9307373375628866f, 7.9366379390025709f, + 7.9425145053392398f, 7.9483672315846778f, + 7.9541963103868749f, 7.9600019320680805f, + 7.9657842846620869f, 7.9715435539507719f, + 7.9772799234999167f, 7.9829935746943103f, + 7.9886846867721654f, 7.9943534368588577f +}; + +float VP8LFastLog2(int v) { + if (v < LOG_LOOKUP_IDX_MAX) { + return kLog2Table[v]; + } else if (v < APPROX_LOG_MAX) { + int log_cnt = 0; + while (v >= LOG_LOOKUP_IDX_MAX) { + ++log_cnt; + v = v >> 1; + } + return kLog2Table[v] + (float)log_cnt; + } else { + return (float)(LOG_2_RECIPROCAL * log((double)v)); + } +} + +//------------------------------------------------------------------------------ +// Image transforms. + +// In-place sum of each component with mod 256. +static WEBP_INLINE void AddPixelsEq(uint32_t* a, uint32_t b) { + const uint32_t alpha_and_green = (*a & 0xff00ff00u) + (b & 0xff00ff00u); + const uint32_t red_and_blue = (*a & 0x00ff00ffu) + (b & 0x00ff00ffu); + *a = (alpha_and_green & 0xff00ff00u) | (red_and_blue & 0x00ff00ffu); +} + +static WEBP_INLINE uint32_t Average2(uint32_t a0, uint32_t a1) { + return (((a0 ^ a1) & 0xfefefefeL) >> 1) + (a0 & a1); +} + +static WEBP_INLINE uint32_t Average3(uint32_t a0, uint32_t a1, uint32_t a2) { + return Average2(Average2(a0, a2), a1); +} + +static WEBP_INLINE uint32_t Average4(uint32_t a0, uint32_t a1, + uint32_t a2, uint32_t a3) { + return Average2(Average2(a0, a1), Average2(a2, a3)); +} + +static WEBP_INLINE uint32_t Clip255(uint32_t a) { + if (a < 256) { + return a; + } + // return 0, when a is a negative integer. + // return 255, when a is positive. + return ~a >> 24; +} + +static WEBP_INLINE int AddSubtractComponentFull(int a, int b, int c) { + return Clip255(a + b - c); +} + +static WEBP_INLINE uint32_t ClampedAddSubtractFull(uint32_t c0, uint32_t c1, + uint32_t c2) { + const int a = AddSubtractComponentFull(c0 >> 24, c1 >> 24, c2 >> 24); + const int r = AddSubtractComponentFull((c0 >> 16) & 0xff, + (c1 >> 16) & 0xff, + (c2 >> 16) & 0xff); + const int g = AddSubtractComponentFull((c0 >> 8) & 0xff, + (c1 >> 8) & 0xff, + (c2 >> 8) & 0xff); + const int b = AddSubtractComponentFull(c0 & 0xff, c1 & 0xff, c2 & 0xff); + return (a << 24) | (r << 16) | (g << 8) | b; +} + +static WEBP_INLINE int AddSubtractComponentHalf(int a, int b) { + return Clip255(a + (a - b) / 2); +} + +static WEBP_INLINE uint32_t ClampedAddSubtractHalf(uint32_t c0, uint32_t c1, + uint32_t c2) { + const uint32_t ave = Average2(c0, c1); + const int a = AddSubtractComponentHalf(ave >> 24, c2 >> 24); + const int r = AddSubtractComponentHalf((ave >> 16) & 0xff, (c2 >> 16) & 0xff); + const int g = AddSubtractComponentHalf((ave >> 8) & 0xff, (c2 >> 8) & 0xff); + const int b = AddSubtractComponentHalf((ave >> 0) & 0xff, (c2 >> 0) & 0xff); + return (a << 24) | (r << 16) | (g << 8) | b; +} + +static WEBP_INLINE int Sub3(int a, int b, int c) { + const int pa = b - c; + const int pb = a - c; + return abs(pa) - abs(pb); +} + +static WEBP_INLINE uint32_t Select(uint32_t a, uint32_t b, uint32_t c) { + const int pa_minus_pb = + Sub3((a >> 24) , (b >> 24) , (c >> 24) ) + + Sub3((a >> 16) & 0xff, (b >> 16) & 0xff, (c >> 16) & 0xff) + + Sub3((a >> 8) & 0xff, (b >> 8) & 0xff, (c >> 8) & 0xff) + + Sub3((a ) & 0xff, (b ) & 0xff, (c ) & 0xff); + + return (pa_minus_pb <= 0) ? a : b; +} + +//------------------------------------------------------------------------------ +// Predictors + +static uint32_t Predictor0(uint32_t left, const uint32_t* const top) { + (void)top; + (void)left; + return ARGB_BLACK; +} +static uint32_t Predictor1(uint32_t left, const uint32_t* const top) { + (void)top; + return left; +} +static uint32_t Predictor2(uint32_t left, const uint32_t* const top) { + (void)left; + return top[0]; +} +static uint32_t Predictor3(uint32_t left, const uint32_t* const top) { + (void)left; + return top[1]; +} +static uint32_t Predictor4(uint32_t left, const uint32_t* const top) { + (void)left; + return top[-1]; +} +static uint32_t Predictor5(uint32_t left, const uint32_t* const top) { + const uint32_t pred = Average3(left, top[0], top[1]); + return pred; +} +static uint32_t Predictor6(uint32_t left, const uint32_t* const top) { + const uint32_t pred = Average2(left, top[-1]); + return pred; +} +static uint32_t Predictor7(uint32_t left, const uint32_t* const top) { + const uint32_t pred = Average2(left, top[0]); + return pred; +} +static uint32_t Predictor8(uint32_t left, const uint32_t* const top) { + const uint32_t pred = Average2(top[-1], top[0]); + (void)left; + return pred; +} +static uint32_t Predictor9(uint32_t left, const uint32_t* const top) { + const uint32_t pred = Average2(top[0], top[1]); + (void)left; + return pred; +} +static uint32_t Predictor10(uint32_t left, const uint32_t* const top) { + const uint32_t pred = Average4(left, top[-1], top[0], top[1]); + return pred; +} +static uint32_t Predictor11(uint32_t left, const uint32_t* const top) { + const uint32_t pred = Select(top[0], left, top[-1]); + return pred; +} +static uint32_t Predictor12(uint32_t left, const uint32_t* const top) { + const uint32_t pred = ClampedAddSubtractFull(left, top[0], top[-1]); + return pred; +} +static uint32_t Predictor13(uint32_t left, const uint32_t* const top) { + const uint32_t pred = ClampedAddSubtractHalf(left, top[0], top[-1]); + return pred; +} + +typedef uint32_t (*PredictorFunc)(uint32_t left, const uint32_t* const top); +static const PredictorFunc kPredictors[16] = { + Predictor0, Predictor1, Predictor2, Predictor3, + Predictor4, Predictor5, Predictor6, Predictor7, + Predictor8, Predictor9, Predictor10, Predictor11, + Predictor12, Predictor13, + Predictor0, Predictor0 // <- padding security sentinels +}; + +// TODO(vikasa): Replace 256 etc with defines. +static float PredictionCostSpatial(const int* counts, + int weight_0, double exp_val) { + const int significant_symbols = 16; + const double exp_decay_factor = 0.6; + double bits = weight_0 * counts[0]; + int i; + for (i = 1; i < significant_symbols; ++i) { + bits += exp_val * (counts[i] + counts[256 - i]); + exp_val *= exp_decay_factor; + } + return (float)(-0.1 * bits); +} + +// Compute the Shanon's entropy: Sum(p*log2(p)) +static float ShannonEntropy(const int* const array, int n) { + int i; + float retval = 0.f; + int sum = 0; + for (i = 0; i < n; ++i) { + if (array[i] != 0) { + sum += array[i]; + retval -= VP8LFastSLog2(array[i]); + } + } + retval += VP8LFastSLog2(sum); + return retval; +} + +static float PredictionCostSpatialHistogram(int accumulated[4][256], + int tile[4][256]) { + int i; + int k; + int combo[256]; + double retval = 0; + for (i = 0; i < 4; ++i) { + const double exp_val = 0.94; + retval += PredictionCostSpatial(&tile[i][0], 1, exp_val); + retval += ShannonEntropy(&tile[i][0], 256); + for (k = 0; k < 256; ++k) { + combo[k] = accumulated[i][k] + tile[i][k]; + } + retval += ShannonEntropy(&combo[0], 256); + } + return (float)retval; +} + +static int GetBestPredictorForTile(int width, int height, + int tile_x, int tile_y, int bits, + int accumulated[4][256], + const uint32_t* const argb_scratch) { + const int kNumPredModes = 14; + const int col_start = tile_x << bits; + const int row_start = tile_y << bits; + const int tile_size = 1 << bits; + const int ymax = (tile_size <= height - row_start) ? + tile_size : height - row_start; + const int xmax = (tile_size <= width - col_start) ? + tile_size : width - col_start; + int histo[4][256]; + float best_diff = MAX_DIFF_COST; + int best_mode = 0; + + int mode; + for (mode = 0; mode < kNumPredModes; ++mode) { + const uint32_t* current_row = argb_scratch; + const PredictorFunc pred_func = kPredictors[mode]; + float cur_diff; + int y; + memset(&histo[0][0], 0, sizeof(histo)); + for (y = 0; y < ymax; ++y) { + int x; + const int row = row_start + y; + const uint32_t* const upper_row = current_row; + current_row = upper_row + width; + for (x = 0; x < xmax; ++x) { + const int col = col_start + x; + uint32_t predict; + uint32_t predict_diff; + if (row == 0) { + predict = (col == 0) ? ARGB_BLACK : current_row[col - 1]; // Left. + } else if (col == 0) { + predict = upper_row[col]; // Top. + } else { + predict = pred_func(current_row[col - 1], upper_row + col); + } + predict_diff = VP8LSubPixels(current_row[col], predict); + ++histo[0][predict_diff >> 24]; + ++histo[1][((predict_diff >> 16) & 0xff)]; + ++histo[2][((predict_diff >> 8) & 0xff)]; + ++histo[3][(predict_diff & 0xff)]; + } + } + cur_diff = PredictionCostSpatialHistogram(accumulated, histo); + if (cur_diff < best_diff) { + best_diff = cur_diff; + best_mode = mode; + } + } + + return best_mode; +} + +static void CopyTileWithPrediction(int width, int height, + int tile_x, int tile_y, int bits, int mode, + const uint32_t* const argb_scratch, + uint32_t* const argb) { + const int col_start = tile_x << bits; + const int row_start = tile_y << bits; + const int tile_size = 1 << bits; + const int ymax = (tile_size <= height - row_start) ? + tile_size : height - row_start; + const int xmax = (tile_size <= width - col_start) ? + tile_size : width - col_start; + const PredictorFunc pred_func = kPredictors[mode]; + const uint32_t* current_row = argb_scratch; + + int y; + for (y = 0; y < ymax; ++y) { + int x; + const int row = row_start + y; + const uint32_t* const upper_row = current_row; + current_row = upper_row + width; + for (x = 0; x < xmax; ++x) { + const int col = col_start + x; + const int pix = row * width + col; + uint32_t predict; + if (row == 0) { + predict = (col == 0) ? ARGB_BLACK : current_row[col - 1]; // Left. + } else if (col == 0) { + predict = upper_row[col]; // Top. + } else { + predict = pred_func(current_row[col - 1], upper_row + col); + } + argb[pix] = VP8LSubPixels(current_row[col], predict); + } + } +} + +void VP8LResidualImage(int width, int height, int bits, + uint32_t* const argb, uint32_t* const argb_scratch, + uint32_t* const image) { + const int max_tile_size = 1 << bits; + const int tiles_per_row = VP8LSubSampleSize(width, bits); + const int tiles_per_col = VP8LSubSampleSize(height, bits); + uint32_t* const upper_row = argb_scratch; + uint32_t* const current_tile_rows = argb_scratch + width; + int tile_y; + int histo[4][256]; + memset(histo, 0, sizeof(histo)); + for (tile_y = 0; tile_y < tiles_per_col; ++tile_y) { + const int tile_y_offset = tile_y * max_tile_size; + const int this_tile_height = + (tile_y < tiles_per_col - 1) ? max_tile_size : height - tile_y_offset; + int tile_x; + if (tile_y > 0) { + memcpy(upper_row, current_tile_rows + (max_tile_size - 1) * width, + width * sizeof(*upper_row)); + } + memcpy(current_tile_rows, &argb[tile_y_offset * width], + this_tile_height * width * sizeof(*current_tile_rows)); + for (tile_x = 0; tile_x < tiles_per_row; ++tile_x) { + int pred; + int y; + const int tile_x_offset = tile_x * max_tile_size; + int all_x_max = tile_x_offset + max_tile_size; + if (all_x_max > width) { + all_x_max = width; + } + pred = GetBestPredictorForTile(width, height, tile_x, tile_y, bits, histo, + argb_scratch); + image[tile_y * tiles_per_row + tile_x] = 0xff000000u | (pred << 8); + CopyTileWithPrediction(width, height, tile_x, tile_y, bits, pred, + argb_scratch, argb); + for (y = 0; y < max_tile_size; ++y) { + int ix; + int all_x; + int all_y = tile_y_offset + y; + if (all_y >= height) { + break; + } + ix = all_y * width + tile_x_offset; + for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { + const uint32_t a = argb[ix]; + ++histo[0][a >> 24]; + ++histo[1][((a >> 16) & 0xff)]; + ++histo[2][((a >> 8) & 0xff)]; + ++histo[3][(a & 0xff)]; + } + } + } + } +} + +// Inverse prediction. +static void PredictorInverseTransform(const VP8LTransform* const transform, + int y_start, int y_end, uint32_t* data) { + const int width = transform->xsize_; + if (y_start == 0) { // First Row follows the L (mode=1) mode. + int x; + const uint32_t pred0 = Predictor0(data[-1], NULL); + AddPixelsEq(data, pred0); + for (x = 1; x < width; ++x) { + const uint32_t pred1 = Predictor1(data[x - 1], NULL); + AddPixelsEq(data + x, pred1); + } + data += width; + ++y_start; + } + + { + int y = y_start; + const int mask = (1 << transform->bits_) - 1; + const int tiles_per_row = VP8LSubSampleSize(width, transform->bits_); + const uint32_t* pred_mode_base = + transform->data_ + (y >> transform->bits_) * tiles_per_row; + + while (y < y_end) { + int x; + const uint32_t pred2 = Predictor2(data[-1], data - width); + const uint32_t* pred_mode_src = pred_mode_base; + PredictorFunc pred_func; + + // First pixel follows the T (mode=2) mode. + AddPixelsEq(data, pred2); + + // .. the rest: + pred_func = kPredictors[((*pred_mode_src++) >> 8) & 0xf]; + for (x = 1; x < width; ++x) { + uint32_t pred; + if ((x & mask) == 0) { // start of tile. Read predictor function. + pred_func = kPredictors[((*pred_mode_src++) >> 8) & 0xf]; + } + pred = pred_func(data[x - 1], data + x - width); + AddPixelsEq(data + x, pred); + } + data += width; + ++y; + if ((y & mask) == 0) { // Use the same mask, since tiles are squares. + pred_mode_base += tiles_per_row; + } + } + } +} + +void VP8LSubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixs) { + int i; + for (i = 0; i < num_pixs; ++i) { + const uint32_t argb = argb_data[i]; + const uint32_t green = (argb >> 8) & 0xff; + const uint32_t new_r = (((argb >> 16) & 0xff) - green) & 0xff; + const uint32_t new_b = ((argb & 0xff) - green) & 0xff; + argb_data[i] = (argb & 0xff00ff00) | (new_r << 16) | new_b; + } +} + +// Add green to blue and red channels (i.e. perform the inverse transform of +// 'subtract green'). +static void AddGreenToBlueAndRed(const VP8LTransform* const transform, + int y_start, int y_end, uint32_t* data) { + const int width = transform->xsize_; + const uint32_t* const data_end = data + (y_end - y_start) * width; + while (data < data_end) { + const uint32_t argb = *data; + // "* 0001001u" is equivalent to "(green << 16) + green)" + const uint32_t green = ((argb >> 8) & 0xff); + uint32_t red_blue = (argb & 0x00ff00ffu); + red_blue += (green << 16) | green; + red_blue &= 0x00ff00ffu; + *data++ = (argb & 0xff00ff00u) | red_blue; + } +} + +typedef struct { + // Note: the members are uint8_t, so that any negative values are + // automatically converted to "mod 256" values. + uint8_t green_to_red_; + uint8_t green_to_blue_; + uint8_t red_to_blue_; +} Multipliers; + +static WEBP_INLINE void MultipliersClear(Multipliers* m) { + m->green_to_red_ = 0; + m->green_to_blue_ = 0; + m->red_to_blue_ = 0; +} + +static WEBP_INLINE uint32_t ColorTransformDelta(int8_t color_pred, + int8_t color) { + return (uint32_t)((int)(color_pred) * color) >> 5; +} + +static WEBP_INLINE void ColorCodeToMultipliers(uint32_t color_code, + Multipliers* const m) { + m->green_to_red_ = (color_code >> 0) & 0xff; + m->green_to_blue_ = (color_code >> 8) & 0xff; + m->red_to_blue_ = (color_code >> 16) & 0xff; +} + +static WEBP_INLINE uint32_t MultipliersToColorCode(Multipliers* const m) { + return 0xff000000u | + ((uint32_t)(m->red_to_blue_) << 16) | + ((uint32_t)(m->green_to_blue_) << 8) | + m->green_to_red_; +} + +static WEBP_INLINE uint32_t TransformColor(const Multipliers* const m, + uint32_t argb, int inverse) { + const uint32_t green = argb >> 8; + const uint32_t red = argb >> 16; + uint32_t new_red = red; + uint32_t new_blue = argb; + + if (inverse) { + new_red += ColorTransformDelta(m->green_to_red_, green); + new_red &= 0xff; + new_blue += ColorTransformDelta(m->green_to_blue_, green); + new_blue += ColorTransformDelta(m->red_to_blue_, new_red); + new_blue &= 0xff; + } else { + new_red -= ColorTransformDelta(m->green_to_red_, green); + new_red &= 0xff; + new_blue -= ColorTransformDelta(m->green_to_blue_, green); + new_blue -= ColorTransformDelta(m->red_to_blue_, red); + new_blue &= 0xff; + } + return (argb & 0xff00ff00u) | (new_red << 16) | (new_blue); +} + +static WEBP_INLINE int SkipRepeatedPixels(const uint32_t* const argb, + int ix, int xsize) { + const uint32_t v = argb[ix]; + if (ix >= xsize + 3) { + if (v == argb[ix - xsize] && + argb[ix - 1] == argb[ix - xsize - 1] && + argb[ix - 2] == argb[ix - xsize - 2] && + argb[ix - 3] == argb[ix - xsize - 3]) { + return 1; + } + return v == argb[ix - 3] && v == argb[ix - 2] && v == argb[ix - 1]; + } else if (ix >= 3) { + return v == argb[ix - 3] && v == argb[ix - 2] && v == argb[ix - 1]; + } + return 0; +} + +static float PredictionCostCrossColor(const int accumulated[256], + const int counts[256]) { + // Favor low entropy, locally and globally. + int i; + int combo[256]; + for (i = 0; i < 256; ++i) { + combo[i] = accumulated[i] + counts[i]; + } + return ShannonEntropy(combo, 256) + + ShannonEntropy(counts, 256) + + PredictionCostSpatial(counts, 3, 2.4); // Favor small absolute values. +} + +static Multipliers GetBestColorTransformForTile( + int tile_x, int tile_y, int bits, + Multipliers prevX, + Multipliers prevY, + int step, int xsize, int ysize, + int* accumulated_red_histo, + int* accumulated_blue_histo, + const uint32_t* const argb) { + float best_diff = MAX_DIFF_COST; + float cur_diff; + const int halfstep = step / 2; + const int max_tile_size = 1 << bits; + const int tile_y_offset = tile_y * max_tile_size; + const int tile_x_offset = tile_x * max_tile_size; + int green_to_red; + int green_to_blue; + int red_to_blue; + int all_x_max = tile_x_offset + max_tile_size; + int all_y_max = tile_y_offset + max_tile_size; + Multipliers best_tx; + MultipliersClear(&best_tx); + if (all_x_max > xsize) { + all_x_max = xsize; + } + if (all_y_max > ysize) { + all_y_max = ysize; + } + for (green_to_red = -64; green_to_red <= 64; green_to_red += halfstep) { + int histo[256] = { 0 }; + int all_y; + Multipliers tx; + MultipliersClear(&tx); + tx.green_to_red_ = green_to_red & 0xff; + + for (all_y = tile_y_offset; all_y < all_y_max; ++all_y) { + uint32_t predict; + int ix = all_y * xsize + tile_x_offset; + int all_x; + for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { + if (SkipRepeatedPixels(argb, ix, xsize)) { + continue; + } + predict = TransformColor(&tx, argb[ix], 0); + ++histo[(predict >> 16) & 0xff]; // red. + } + } + cur_diff = PredictionCostCrossColor(&accumulated_red_histo[0], &histo[0]); + if (tx.green_to_red_ == prevX.green_to_red_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if (tx.green_to_red_ == prevY.green_to_red_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if (tx.green_to_red_ == 0) { + cur_diff -= 3; + } + if (cur_diff < best_diff) { + best_diff = cur_diff; + best_tx = tx; + } + } + best_diff = MAX_DIFF_COST; + green_to_red = best_tx.green_to_red_; + for (green_to_blue = -32; green_to_blue <= 32; green_to_blue += step) { + for (red_to_blue = -32; red_to_blue <= 32; red_to_blue += step) { + int all_y; + int histo[256] = { 0 }; + Multipliers tx; + tx.green_to_red_ = green_to_red; + tx.green_to_blue_ = green_to_blue; + tx.red_to_blue_ = red_to_blue; + for (all_y = tile_y_offset; all_y < all_y_max; ++all_y) { + uint32_t predict; + int all_x; + int ix = all_y * xsize + tile_x_offset; + for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { + if (SkipRepeatedPixels(argb, ix, xsize)) { + continue; + } + predict = TransformColor(&tx, argb[ix], 0); + ++histo[predict & 0xff]; // blue. + } + } + cur_diff = + PredictionCostCrossColor(&accumulated_blue_histo[0], &histo[0]); + if (tx.green_to_blue_ == prevX.green_to_blue_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if (tx.green_to_blue_ == prevY.green_to_blue_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if (tx.red_to_blue_ == prevX.red_to_blue_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if (tx.red_to_blue_ == prevY.red_to_blue_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if (tx.green_to_blue_ == 0) { + cur_diff -= 3; + } + if (tx.red_to_blue_ == 0) { + cur_diff -= 3; + } + if (cur_diff < best_diff) { + best_diff = cur_diff; + best_tx = tx; + } + } + } + return best_tx; +} + +static void CopyTileWithColorTransform(int xsize, int ysize, + int tile_x, int tile_y, int bits, + Multipliers color_transform, + uint32_t* const argb) { + int y; + int xscan = 1 << bits; + int yscan = 1 << bits; + tile_x <<= bits; + tile_y <<= bits; + if (xscan > xsize - tile_x) { + xscan = xsize - tile_x; + } + if (yscan > ysize - tile_y) { + yscan = ysize - tile_y; + } + yscan += tile_y; + for (y = tile_y; y < yscan; ++y) { + int ix = y * xsize + tile_x; + const int end_ix = ix + xscan; + for (; ix < end_ix; ++ix) { + argb[ix] = TransformColor(&color_transform, argb[ix], 0); + } + } +} + +void VP8LColorSpaceTransform(int width, int height, int bits, int step, + uint32_t* const argb, uint32_t* image) { + const int max_tile_size = 1 << bits; + int tile_xsize = VP8LSubSampleSize(width, bits); + int tile_ysize = VP8LSubSampleSize(height, bits); + int accumulated_red_histo[256] = { 0 }; + int accumulated_blue_histo[256] = { 0 }; + int tile_y; + int tile_x; + Multipliers prevX; + Multipliers prevY; + MultipliersClear(&prevY); + MultipliersClear(&prevX); + for (tile_y = 0; tile_y < tile_ysize; ++tile_y) { + for (tile_x = 0; tile_x < tile_xsize; ++tile_x) { + Multipliers color_transform; + int all_x_max; + int y; + const int tile_y_offset = tile_y * max_tile_size; + const int tile_x_offset = tile_x * max_tile_size; + if (tile_y != 0) { + ColorCodeToMultipliers(image[tile_y * tile_xsize + tile_x - 1], &prevX); + ColorCodeToMultipliers(image[(tile_y - 1) * tile_xsize + tile_x], + &prevY); + } else if (tile_x != 0) { + ColorCodeToMultipliers(image[tile_y * tile_xsize + tile_x - 1], &prevX); + } + color_transform = + GetBestColorTransformForTile(tile_x, tile_y, bits, + prevX, prevY, + step, width, height, + &accumulated_red_histo[0], + &accumulated_blue_histo[0], + argb); + image[tile_y * tile_xsize + tile_x] = + MultipliersToColorCode(&color_transform); + CopyTileWithColorTransform(width, height, tile_x, tile_y, bits, + color_transform, argb); + + // Gather accumulated histogram data. + all_x_max = tile_x_offset + max_tile_size; + if (all_x_max > width) { + all_x_max = width; + } + for (y = 0; y < max_tile_size; ++y) { + int ix; + int all_x; + int all_y = tile_y_offset + y; + if (all_y >= height) { + break; + } + ix = all_y * width + tile_x_offset; + for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { + if (ix >= 2 && + argb[ix] == argb[ix - 2] && + argb[ix] == argb[ix - 1]) { + continue; // repeated pixels are handled by backward references + } + if (ix >= width + 2 && + argb[ix - 2] == argb[ix - width - 2] && + argb[ix - 1] == argb[ix - width - 1] && + argb[ix] == argb[ix - width]) { + continue; // repeated pixels are handled by backward references + } + ++accumulated_red_histo[(argb[ix] >> 16) & 0xff]; + ++accumulated_blue_histo[argb[ix] & 0xff]; + } + } + } + } +} + +// Color space inverse transform. +static void ColorSpaceInverseTransform(const VP8LTransform* const transform, + int y_start, int y_end, uint32_t* data) { + const int width = transform->xsize_; + const int mask = (1 << transform->bits_) - 1; + const int tiles_per_row = VP8LSubSampleSize(width, transform->bits_); + int y = y_start; + const uint32_t* pred_row = + transform->data_ + (y >> transform->bits_) * tiles_per_row; + + while (y < y_end) { + const uint32_t* pred = pred_row; + Multipliers m = { 0, 0, 0 }; + int x; + + for (x = 0; x < width; ++x) { + if ((x & mask) == 0) ColorCodeToMultipliers(*pred++, &m); + data[x] = TransformColor(&m, data[x], 1); + } + data += width; + ++y; + if ((y & mask) == 0) pred_row += tiles_per_row;; + } +} + +// Separate out pixels packed together using pixel-bundling. +static void ColorIndexInverseTransform( + const VP8LTransform* const transform, + int y_start, int y_end, const uint32_t* src, uint32_t* dst) { + int y; + const int bits_per_pixel = 8 >> transform->bits_; + const int width = transform->xsize_; + const uint32_t* const color_map = transform->data_; + if (bits_per_pixel < 8) { + const int pixels_per_byte = 1 << transform->bits_; + const int count_mask = pixels_per_byte - 1; + const uint32_t bit_mask = (1 << bits_per_pixel) - 1; + for (y = y_start; y < y_end; ++y) { + uint32_t packed_pixels = 0; + int x; + for (x = 0; x < width; ++x) { + // We need to load fresh 'packed_pixels' once every 'pixels_per_byte' + // increments of x. Fortunately, pixels_per_byte is a power of 2, so + // can just use a mask for that, instead of decrementing a counter. + if ((x & count_mask) == 0) packed_pixels = ((*src++) >> 8) & 0xff; + *dst++ = color_map[packed_pixels & bit_mask]; + packed_pixels >>= bits_per_pixel; + } + } + } else { + for (y = y_start; y < y_end; ++y) { + int x; + for (x = 0; x < width; ++x) { + *dst++ = color_map[((*src++) >> 8) & 0xff]; + } + } + } +} + +void VP8LInverseTransform(const VP8LTransform* const transform, + int row_start, int row_end, + const uint32_t* const in, uint32_t* const out) { + assert(row_start < row_end); + assert(row_end <= transform->ysize_); + switch (transform->type_) { + case SUBTRACT_GREEN: + AddGreenToBlueAndRed(transform, row_start, row_end, out); + break; + case PREDICTOR_TRANSFORM: + PredictorInverseTransform(transform, row_start, row_end, out); + if (row_end != transform->ysize_) { + // The last predicted row in this iteration will be the top-pred row + // for the first row in next iteration. + const int width = transform->xsize_; + memcpy(out - width, out + (row_end - row_start - 1) * width, + width * sizeof(*out)); + } + break; + case CROSS_COLOR_TRANSFORM: + ColorSpaceInverseTransform(transform, row_start, row_end, out); + break; + case COLOR_INDEXING_TRANSFORM: + if (in == out && transform->bits_ > 0) { + // Move packed pixels to the end of unpacked region, so that unpacking + // can occur seamlessly. + // Also, note that this is the only transform that applies on + // the effective width of VP8LSubSampleSize(xsize_, bits_). All other + // transforms work on effective width of xsize_. + const int out_stride = (row_end - row_start) * transform->xsize_; + const int in_stride = (row_end - row_start) * + VP8LSubSampleSize(transform->xsize_, transform->bits_); + uint32_t* const src = out + out_stride - in_stride; + memmove(src, out, in_stride * sizeof(*src)); + ColorIndexInverseTransform(transform, row_start, row_end, src, out); + } else { + ColorIndexInverseTransform(transform, row_start, row_end, in, out); + } + break; + } +} + +//------------------------------------------------------------------------------ +// Color space conversion. + +static int is_big_endian(void) { + static const union { + uint16_t w; + uint8_t b[2]; + } tmp = { 1 }; + return (tmp.b[0] != 1); +} + +static void ConvertBGRAToRGB(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const src_end = src + num_pixels; + while (src < src_end) { + const uint32_t argb = *src++; + *dst++ = (argb >> 16) & 0xff; + *dst++ = (argb >> 8) & 0xff; + *dst++ = (argb >> 0) & 0xff; + } +} + +static void ConvertBGRAToRGBA(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const src_end = src + num_pixels; + while (src < src_end) { + const uint32_t argb = *src++; + *dst++ = (argb >> 16) & 0xff; + *dst++ = (argb >> 8) & 0xff; + *dst++ = (argb >> 0) & 0xff; + *dst++ = (argb >> 24) & 0xff; + } +} + +static void ConvertBGRAToRGBA4444(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const src_end = src + num_pixels; + while (src < src_end) { + const uint32_t argb = *src++; + *dst++ = ((argb >> 16) & 0xf0) | ((argb >> 12) & 0xf); + *dst++ = ((argb >> 0) & 0xf0) | ((argb >> 28) & 0xf); + } +} + +static void ConvertBGRAToRGB565(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const src_end = src + num_pixels; + while (src < src_end) { + const uint32_t argb = *src++; + *dst++ = ((argb >> 16) & 0xf8) | ((argb >> 13) & 0x7); + *dst++ = ((argb >> 5) & 0xe0) | ((argb >> 3) & 0x1f); + } +} + +static void ConvertBGRAToBGR(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const src_end = src + num_pixels; + while (src < src_end) { + const uint32_t argb = *src++; + *dst++ = (argb >> 0) & 0xff; + *dst++ = (argb >> 8) & 0xff; + *dst++ = (argb >> 16) & 0xff; + } +} + +static void CopyOrSwap(const uint32_t* src, int num_pixels, uint8_t* dst, + int swap_on_big_endian) { + if (is_big_endian() == swap_on_big_endian) { + const uint32_t* const src_end = src + num_pixels; + while (src < src_end) { + uint32_t argb = *src++; +#if !defined(__BIG_ENDIAN__) && (defined(__i386__) || defined(__x86_64__)) + __asm__ volatile("bswap %0" : "=r"(argb) : "0"(argb)); + *(uint32_t*)dst = argb; + dst += sizeof(argb); +#elif !defined(__BIG_ENDIAN__) && defined(_MSC_VER) + argb = _byteswap_ulong(argb); + *(uint32_t*)dst = argb; + dst += sizeof(argb); +#else + *dst++ = (argb >> 24) & 0xff; + *dst++ = (argb >> 16) & 0xff; + *dst++ = (argb >> 8) & 0xff; + *dst++ = (argb >> 0) & 0xff; +#endif + } + } else { + memcpy(dst, src, num_pixels * sizeof(*src)); + } +} + +void VP8LConvertFromBGRA(const uint32_t* const in_data, int num_pixels, + WEBP_CSP_MODE out_colorspace, uint8_t* const rgba) { + switch (out_colorspace) { + case MODE_RGB: + ConvertBGRAToRGB(in_data, num_pixels, rgba); + break; + case MODE_RGBA: + ConvertBGRAToRGBA(in_data, num_pixels, rgba); + break; + case MODE_rgbA: + ConvertBGRAToRGBA(in_data, num_pixels, rgba); + WebPApplyAlphaMultiply(rgba, 0, num_pixels, 1, 0); + break; + case MODE_BGR: + ConvertBGRAToBGR(in_data, num_pixels, rgba); + break; + case MODE_BGRA: + CopyOrSwap(in_data, num_pixels, rgba, 1); + break; + case MODE_bgrA: + CopyOrSwap(in_data, num_pixels, rgba, 1); + WebPApplyAlphaMultiply(rgba, 0, num_pixels, 1, 0); + break; + case MODE_ARGB: + CopyOrSwap(in_data, num_pixels, rgba, 0); + break; + case MODE_Argb: + CopyOrSwap(in_data, num_pixels, rgba, 0); + WebPApplyAlphaMultiply(rgba, 1, num_pixels, 1, 0); + break; + case MODE_RGBA_4444: + ConvertBGRAToRGBA4444(in_data, num_pixels, rgba); + break; + case MODE_rgbA_4444: + ConvertBGRAToRGBA4444(in_data, num_pixels, rgba); + WebPApplyAlphaMultiply4444(rgba, num_pixels, 1, 0); + break; + case MODE_RGB_565: + ConvertBGRAToRGB565(in_data, num_pixels, rgba); + break; + default: + assert(0); // Code flow should not reach here. + } +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dsp/lossless.h b/drivers/webpold/dsp/lossless.h new file mode 100644 index 0000000000..7c7d5555ed --- /dev/null +++ b/drivers/webpold/dsp/lossless.h @@ -0,0 +1,82 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Image transforms and color space conversion methods for lossless decoder. +// +// Authors: Vikas Arora (vikaas.arora@gmail.com) +// Jyrki Alakuijala (jyrki@google.com) + +#ifndef WEBP_DSP_LOSSLESS_H_ +#define WEBP_DSP_LOSSLESS_H_ + +#include "../types.h" +#include "../decode.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Image transforms. + +struct VP8LTransform; // Defined in dec/vp8li.h. + +// Performs inverse transform of data given transform information, start and end +// rows. Transform will be applied to rows [row_start, row_end[. +// The *in and *out pointers refer to source and destination data respectively +// corresponding to the intermediate row (row_start). +void VP8LInverseTransform(const struct VP8LTransform* const transform, + int row_start, int row_end, + const uint32_t* const in, uint32_t* const out); + +// Subtracts green from blue and red channels. +void VP8LSubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixs); + +void VP8LResidualImage(int width, int height, int bits, + uint32_t* const argb, uint32_t* const argb_scratch, + uint32_t* const image); + +void VP8LColorSpaceTransform(int width, int height, int bits, int step, + uint32_t* const argb, uint32_t* image); + +//------------------------------------------------------------------------------ +// Color space conversion. + +// Converts from BGRA to other color spaces. +void VP8LConvertFromBGRA(const uint32_t* const in_data, int num_pixels, + WEBP_CSP_MODE out_colorspace, uint8_t* const rgba); + +//------------------------------------------------------------------------------ +// Misc methods. + +// Computes sampled size of 'size' when sampling using 'sampling bits'. +static WEBP_INLINE uint32_t VP8LSubSampleSize(uint32_t size, + uint32_t sampling_bits) { + return (size + (1 << sampling_bits) - 1) >> sampling_bits; +} + +// Faster logarithm for integers, with the property of log2(0) == 0. +float VP8LFastLog2(int v); +// Fast calculation of v * log2(v) for integer input. +static WEBP_INLINE float VP8LFastSLog2(int v) { return VP8LFastLog2(v) * v; } + +// In-place difference of each component with mod 256. +static WEBP_INLINE uint32_t VP8LSubPixels(uint32_t a, uint32_t b) { + const uint32_t alpha_and_green = + 0x00ff00ffu + (a & 0xff00ff00u) - (b & 0xff00ff00u); + const uint32_t red_and_blue = + 0xff00ff00u + (a & 0x00ff00ffu) - (b & 0x00ff00ffu); + return (alpha_and_green & 0xff00ff00u) | (red_and_blue & 0x00ff00ffu); +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif // WEBP_DSP_LOSSLESS_H_ diff --git a/drivers/webpold/dsp/upsampling.c b/drivers/webpold/dsp/upsampling.c new file mode 100644 index 0000000000..4855eb1432 --- /dev/null +++ b/drivers/webpold/dsp/upsampling.c @@ -0,0 +1,357 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// YUV to RGB upsampling functions. +// +// Author: somnath@google.com (Somnath Banerjee) + +#include "./dsp.h" +#include "./yuv.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Fancy upsampler + +#ifdef FANCY_UPSAMPLING + +// Fancy upsampling functions to convert YUV to RGB +WebPUpsampleLinePairFunc WebPUpsamplers[MODE_LAST]; + +// Given samples laid out in a square as: +// [a b] +// [c d] +// we interpolate u/v as: +// ([9*a + 3*b + 3*c + d 3*a + 9*b + 3*c + d] + [8 8]) / 16 +// ([3*a + b + 9*c + 3*d a + 3*b + 3*c + 9*d] [8 8]) / 16 + +// We process u and v together stashed into 32bit (16bit each). +#define LOAD_UV(u,v) ((u) | ((v) << 16)) + +#define UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ +static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ + const uint8_t* top_u, const uint8_t* top_v, \ + const uint8_t* cur_u, const uint8_t* cur_v, \ + uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ + int x; \ + const int last_pixel_pair = (len - 1) >> 1; \ + uint32_t tl_uv = LOAD_UV(top_u[0], top_v[0]); /* top-left sample */ \ + uint32_t l_uv = LOAD_UV(cur_u[0], cur_v[0]); /* left-sample */ \ + if (top_y) { \ + const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ + FUNC(top_y[0], uv0 & 0xff, (uv0 >> 16), top_dst); \ + } \ + if (bottom_y) { \ + const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ + FUNC(bottom_y[0], uv0 & 0xff, (uv0 >> 16), bottom_dst); \ + } \ + for (x = 1; x <= last_pixel_pair; ++x) { \ + const uint32_t t_uv = LOAD_UV(top_u[x], top_v[x]); /* top sample */ \ + const uint32_t uv = LOAD_UV(cur_u[x], cur_v[x]); /* sample */ \ + /* precompute invariant values associated with first and second diagonals*/\ + const uint32_t avg = tl_uv + t_uv + l_uv + uv + 0x00080008u; \ + const uint32_t diag_12 = (avg + 2 * (t_uv + l_uv)) >> 3; \ + const uint32_t diag_03 = (avg + 2 * (tl_uv + uv)) >> 3; \ + if (top_y) { \ + const uint32_t uv0 = (diag_12 + tl_uv) >> 1; \ + const uint32_t uv1 = (diag_03 + t_uv) >> 1; \ + FUNC(top_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ + top_dst + (2 * x - 1) * XSTEP); \ + FUNC(top_y[2 * x - 0], uv1 & 0xff, (uv1 >> 16), \ + top_dst + (2 * x - 0) * XSTEP); \ + } \ + if (bottom_y) { \ + const uint32_t uv0 = (diag_03 + l_uv) >> 1; \ + const uint32_t uv1 = (diag_12 + uv) >> 1; \ + FUNC(bottom_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ + bottom_dst + (2 * x - 1) * XSTEP); \ + FUNC(bottom_y[2 * x + 0], uv1 & 0xff, (uv1 >> 16), \ + bottom_dst + (2 * x + 0) * XSTEP); \ + } \ + tl_uv = t_uv; \ + l_uv = uv; \ + } \ + if (!(len & 1)) { \ + if (top_y) { \ + const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ + FUNC(top_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ + top_dst + (len - 1) * XSTEP); \ + } \ + if (bottom_y) { \ + const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ + FUNC(bottom_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ + bottom_dst + (len - 1) * XSTEP); \ + } \ + } \ +} + +// All variants implemented. +UPSAMPLE_FUNC(UpsampleRgbLinePair, VP8YuvToRgb, 3) +UPSAMPLE_FUNC(UpsampleBgrLinePair, VP8YuvToBgr, 3) +UPSAMPLE_FUNC(UpsampleRgbaLinePair, VP8YuvToRgba, 4) +UPSAMPLE_FUNC(UpsampleBgraLinePair, VP8YuvToBgra, 4) +UPSAMPLE_FUNC(UpsampleArgbLinePair, VP8YuvToArgb, 4) +UPSAMPLE_FUNC(UpsampleRgba4444LinePair, VP8YuvToRgba4444, 2) +UPSAMPLE_FUNC(UpsampleRgb565LinePair, VP8YuvToRgb565, 2) + +#undef LOAD_UV +#undef UPSAMPLE_FUNC + +#endif // FANCY_UPSAMPLING + +//------------------------------------------------------------------------------ +// simple point-sampling + +#define SAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ +static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ + const uint8_t* u, const uint8_t* v, \ + uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ + int i; \ + for (i = 0; i < len - 1; i += 2) { \ + FUNC(top_y[0], u[0], v[0], top_dst); \ + FUNC(top_y[1], u[0], v[0], top_dst + XSTEP); \ + FUNC(bottom_y[0], u[0], v[0], bottom_dst); \ + FUNC(bottom_y[1], u[0], v[0], bottom_dst + XSTEP); \ + top_y += 2; \ + bottom_y += 2; \ + u++; \ + v++; \ + top_dst += 2 * XSTEP; \ + bottom_dst += 2 * XSTEP; \ + } \ + if (i == len - 1) { /* last one */ \ + FUNC(top_y[0], u[0], v[0], top_dst); \ + FUNC(bottom_y[0], u[0], v[0], bottom_dst); \ + } \ +} + +// All variants implemented. +SAMPLE_FUNC(SampleRgbLinePair, VP8YuvToRgb, 3) +SAMPLE_FUNC(SampleBgrLinePair, VP8YuvToBgr, 3) +SAMPLE_FUNC(SampleRgbaLinePair, VP8YuvToRgba, 4) +SAMPLE_FUNC(SampleBgraLinePair, VP8YuvToBgra, 4) +SAMPLE_FUNC(SampleArgbLinePair, VP8YuvToArgb, 4) +SAMPLE_FUNC(SampleRgba4444LinePair, VP8YuvToRgba4444, 2) +SAMPLE_FUNC(SampleRgb565LinePair, VP8YuvToRgb565, 2) + +#undef SAMPLE_FUNC + +const WebPSampleLinePairFunc WebPSamplers[MODE_LAST] = { + SampleRgbLinePair, // MODE_RGB + SampleRgbaLinePair, // MODE_RGBA + SampleBgrLinePair, // MODE_BGR + SampleBgraLinePair, // MODE_BGRA + SampleArgbLinePair, // MODE_ARGB + SampleRgba4444LinePair, // MODE_RGBA_4444 + SampleRgb565LinePair, // MODE_RGB_565 + SampleRgbaLinePair, // MODE_rgbA + SampleBgraLinePair, // MODE_bgrA + SampleArgbLinePair, // MODE_Argb + SampleRgba4444LinePair // MODE_rgbA_4444 +}; + +//------------------------------------------------------------------------------ + +#if !defined(FANCY_UPSAMPLING) +#define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC) \ +static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bot_y, \ + const uint8_t* top_u, const uint8_t* top_v, \ + const uint8_t* bot_u, const uint8_t* bot_v, \ + uint8_t* top_dst, uint8_t* bot_dst, int len) { \ + const int half_len = len >> 1; \ + int x; \ + if (top_dst != NULL) { \ + for (x = 0; x < half_len; ++x) { \ + FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x + 0); \ + FUNC(top_y[2 * x + 1], top_u[x], top_v[x], top_dst + 8 * x + 4); \ + } \ + if (len & 1) FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x); \ + } \ + if (bot_dst != NULL) { \ + for (x = 0; x < half_len; ++x) { \ + FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x + 0); \ + FUNC(bot_y[2 * x + 1], bot_u[x], bot_v[x], bot_dst + 8 * x + 4); \ + } \ + if (len & 1) FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x); \ + } \ +} + +DUAL_SAMPLE_FUNC(DualLineSamplerBGRA, VP8YuvToBgra) +DUAL_SAMPLE_FUNC(DualLineSamplerARGB, VP8YuvToArgb) +#undef DUAL_SAMPLE_FUNC + +#endif // !FANCY_UPSAMPLING + +WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last) { + WebPInitUpsamplers(); + VP8YUVInit(); +#ifdef FANCY_UPSAMPLING + return WebPUpsamplers[alpha_is_last ? MODE_BGRA : MODE_ARGB]; +#else + return (alpha_is_last ? DualLineSamplerBGRA : DualLineSamplerARGB); +#endif +} + +//------------------------------------------------------------------------------ +// YUV444 converter + +#define YUV444_FUNC(FUNC_NAME, FUNC, XSTEP) \ +static void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len) { \ + int i; \ + for (i = 0; i < len; ++i) FUNC(y[i], u[i], v[i], &dst[i * XSTEP]); \ +} + +YUV444_FUNC(Yuv444ToRgb, VP8YuvToRgb, 3) +YUV444_FUNC(Yuv444ToBgr, VP8YuvToBgr, 3) +YUV444_FUNC(Yuv444ToRgba, VP8YuvToRgba, 4) +YUV444_FUNC(Yuv444ToBgra, VP8YuvToBgra, 4) +YUV444_FUNC(Yuv444ToArgb, VP8YuvToArgb, 4) +YUV444_FUNC(Yuv444ToRgba4444, VP8YuvToRgba4444, 2) +YUV444_FUNC(Yuv444ToRgb565, VP8YuvToRgb565, 2) + +#undef YUV444_FUNC + +const WebPYUV444Converter WebPYUV444Converters[MODE_LAST] = { + Yuv444ToRgb, // MODE_RGB + Yuv444ToRgba, // MODE_RGBA + Yuv444ToBgr, // MODE_BGR + Yuv444ToBgra, // MODE_BGRA + Yuv444ToArgb, // MODE_ARGB + Yuv444ToRgba4444, // MODE_RGBA_4444 + Yuv444ToRgb565, // MODE_RGB_565 + Yuv444ToRgba, // MODE_rgbA + Yuv444ToBgra, // MODE_bgrA + Yuv444ToArgb, // MODE_Argb + Yuv444ToRgba4444 // MODE_rgbA_4444 +}; + +//------------------------------------------------------------------------------ +// Premultiplied modes + +// non dithered-modes + +// (x * a * 32897) >> 23 is bit-wise equivalent to (int)(x * a / 255.) +// for all 8bit x or a. For bit-wise equivalence to (int)(x * a / 255. + .5), +// one can use instead: (x * a * 65793 + (1 << 23)) >> 24 +#if 1 // (int)(x * a / 255.) +#define MULTIPLIER(a) ((a) * 32897UL) +#define PREMULTIPLY(x, m) (((x) * (m)) >> 23) +#else // (int)(x * a / 255. + .5) +#define MULTIPLIER(a) ((a) * 65793UL) +#define PREMULTIPLY(x, m) (((x) * (m) + (1UL << 23)) >> 24) +#endif + +static void ApplyAlphaMultiply(uint8_t* rgba, int alpha_first, + int w, int h, int stride) { + while (h-- > 0) { + uint8_t* const rgb = rgba + (alpha_first ? 1 : 0); + const uint8_t* const alpha = rgba + (alpha_first ? 0 : 3); + int i; + for (i = 0; i < w; ++i) { + const uint32_t a = alpha[4 * i]; + if (a != 0xff) { + const uint32_t mult = MULTIPLIER(a); + rgb[4 * i + 0] = PREMULTIPLY(rgb[4 * i + 0], mult); + rgb[4 * i + 1] = PREMULTIPLY(rgb[4 * i + 1], mult); + rgb[4 * i + 2] = PREMULTIPLY(rgb[4 * i + 2], mult); + } + } + rgba += stride; + } +} +#undef MULTIPLIER +#undef PREMULTIPLY + +// rgbA4444 + +#define MULTIPLIER(a) ((a) * 0x1111) // 0x1111 ~= (1 << 16) / 15 + +static WEBP_INLINE uint8_t dither_hi(uint8_t x) { + return (x & 0xf0) | (x >> 4); +} + +static WEBP_INLINE uint8_t dither_lo(uint8_t x) { + return (x & 0x0f) | (x << 4); +} + +static WEBP_INLINE uint8_t multiply(uint8_t x, uint32_t m) { + return (x * m) >> 16; +} + +static void ApplyAlphaMultiply4444(uint8_t* rgba4444, + int w, int h, int stride) { + while (h-- > 0) { + int i; + for (i = 0; i < w; ++i) { + const uint8_t a = (rgba4444[2 * i + 1] & 0x0f); + const uint32_t mult = MULTIPLIER(a); + const uint8_t r = multiply(dither_hi(rgba4444[2 * i + 0]), mult); + const uint8_t g = multiply(dither_lo(rgba4444[2 * i + 0]), mult); + const uint8_t b = multiply(dither_hi(rgba4444[2 * i + 1]), mult); + rgba4444[2 * i + 0] = (r & 0xf0) | ((g >> 4) & 0x0f); + rgba4444[2 * i + 1] = (b & 0xf0) | a; + } + rgba4444 += stride; + } +} +#undef MULTIPLIER + +void (*WebPApplyAlphaMultiply)(uint8_t*, int, int, int, int) + = ApplyAlphaMultiply; +void (*WebPApplyAlphaMultiply4444)(uint8_t*, int, int, int) + = ApplyAlphaMultiply4444; + +//------------------------------------------------------------------------------ +// Main call + +void WebPInitUpsamplers(void) { +#ifdef FANCY_UPSAMPLING + WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair; + WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair; + WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair; + WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair; + WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair; + WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitUpsamplersSSE2(); + } +#endif + } +#endif // FANCY_UPSAMPLING +} + +void WebPInitPremultiply(void) { + WebPApplyAlphaMultiply = ApplyAlphaMultiply; + WebPApplyAlphaMultiply4444 = ApplyAlphaMultiply4444; + +#ifdef FANCY_UPSAMPLING + WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; + WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair; + WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair; + + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitPremultiplySSE2(); + } +#endif + } +#endif // FANCY_UPSAMPLING +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dsp/upsampling_sse2.c b/drivers/webpold/dsp/upsampling_sse2.c new file mode 100644 index 0000000000..8cb275a02b --- /dev/null +++ b/drivers/webpold/dsp/upsampling_sse2.c @@ -0,0 +1,209 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// SSE2 version of YUV to RGB upsampling functions. +// +// Author: somnath@google.com (Somnath Banerjee) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) + +#include <assert.h> +#include <emmintrin.h> +#include <string.h> +#include "./yuv.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#ifdef FANCY_UPSAMPLING + +// We compute (9*a + 3*b + 3*c + d + 8) / 16 as follows +// u = (9*a + 3*b + 3*c + d + 8) / 16 +// = (a + (a + 3*b + 3*c + d) / 8 + 1) / 2 +// = (a + m + 1) / 2 +// where m = (a + 3*b + 3*c + d) / 8 +// = ((a + b + c + d) / 2 + b + c) / 4 +// +// Let's say k = (a + b + c + d) / 4. +// We can compute k as +// k = (s + t + 1) / 2 - ((a^d) | (b^c) | (s^t)) & 1 +// where s = (a + d + 1) / 2 and t = (b + c + 1) / 2 +// +// Then m can be written as +// m = (k + t + 1) / 2 - (((b^c) & (s^t)) | (k^t)) & 1 + +// Computes out = (k + in + 1) / 2 - ((ij & (s^t)) | (k^in)) & 1 +#define GET_M(ij, in, out) do { \ + const __m128i tmp0 = _mm_avg_epu8(k, (in)); /* (k + in + 1) / 2 */ \ + const __m128i tmp1 = _mm_and_si128((ij), st); /* (ij) & (s^t) */ \ + const __m128i tmp2 = _mm_xor_si128(k, (in)); /* (k^in) */ \ + const __m128i tmp3 = _mm_or_si128(tmp1, tmp2); /* ((ij) & (s^t)) | (k^in) */\ + const __m128i tmp4 = _mm_and_si128(tmp3, one); /* & 1 -> lsb_correction */ \ + (out) = _mm_sub_epi8(tmp0, tmp4); /* (k + in + 1) / 2 - lsb_correction */ \ +} while (0) + +// pack and store two alterning pixel rows +#define PACK_AND_STORE(a, b, da, db, out) do { \ + const __m128i ta = _mm_avg_epu8(a, da); /* (9a + 3b + 3c + d + 8) / 16 */ \ + const __m128i tb = _mm_avg_epu8(b, db); /* (3a + 9b + c + 3d + 8) / 16 */ \ + const __m128i t1 = _mm_unpacklo_epi8(ta, tb); \ + const __m128i t2 = _mm_unpackhi_epi8(ta, tb); \ + _mm_store_si128(((__m128i*)(out)) + 0, t1); \ + _mm_store_si128(((__m128i*)(out)) + 1, t2); \ +} while (0) + +// Loads 17 pixels each from rows r1 and r2 and generates 32 pixels. +#define UPSAMPLE_32PIXELS(r1, r2, out) { \ + const __m128i one = _mm_set1_epi8(1); \ + const __m128i a = _mm_loadu_si128((__m128i*)&(r1)[0]); \ + const __m128i b = _mm_loadu_si128((__m128i*)&(r1)[1]); \ + const __m128i c = _mm_loadu_si128((__m128i*)&(r2)[0]); \ + const __m128i d = _mm_loadu_si128((__m128i*)&(r2)[1]); \ + \ + const __m128i s = _mm_avg_epu8(a, d); /* s = (a + d + 1) / 2 */ \ + const __m128i t = _mm_avg_epu8(b, c); /* t = (b + c + 1) / 2 */ \ + const __m128i st = _mm_xor_si128(s, t); /* st = s^t */ \ + \ + const __m128i ad = _mm_xor_si128(a, d); /* ad = a^d */ \ + const __m128i bc = _mm_xor_si128(b, c); /* bc = b^c */ \ + \ + const __m128i t1 = _mm_or_si128(ad, bc); /* (a^d) | (b^c) */ \ + const __m128i t2 = _mm_or_si128(t1, st); /* (a^d) | (b^c) | (s^t) */ \ + const __m128i t3 = _mm_and_si128(t2, one); /* (a^d) | (b^c) | (s^t) & 1 */ \ + const __m128i t4 = _mm_avg_epu8(s, t); \ + const __m128i k = _mm_sub_epi8(t4, t3); /* k = (a + b + c + d) / 4 */ \ + __m128i diag1, diag2; \ + \ + GET_M(bc, t, diag1); /* diag1 = (a + 3b + 3c + d) / 8 */ \ + GET_M(ad, s, diag2); /* diag2 = (3a + b + c + 3d) / 8 */ \ + \ + /* pack the alternate pixels */ \ + PACK_AND_STORE(a, b, diag1, diag2, &(out)[0 * 32]); \ + PACK_AND_STORE(c, d, diag2, diag1, &(out)[2 * 32]); \ +} + +// Turn the macro into a function for reducing code-size when non-critical +static void Upsample32Pixels(const uint8_t r1[], const uint8_t r2[], + uint8_t* const out) { + UPSAMPLE_32PIXELS(r1, r2, out); +} + +#define UPSAMPLE_LAST_BLOCK(tb, bb, num_pixels, out) { \ + uint8_t r1[17], r2[17]; \ + memcpy(r1, (tb), (num_pixels)); \ + memcpy(r2, (bb), (num_pixels)); \ + /* replicate last byte */ \ + memset(r1 + (num_pixels), r1[(num_pixels) - 1], 17 - (num_pixels)); \ + memset(r2 + (num_pixels), r2[(num_pixels) - 1], 17 - (num_pixels)); \ + /* using the shared function instead of the macro saves ~3k code size */ \ + Upsample32Pixels(r1, r2, out); \ +} + +#define CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, uv, \ + top_dst, bottom_dst, cur_x, num_pixels) { \ + int n; \ + if (top_y) { \ + for (n = 0; n < (num_pixels); ++n) { \ + FUNC(top_y[(cur_x) + n], (uv)[n], (uv)[32 + n], \ + top_dst + ((cur_x) + n) * XSTEP); \ + } \ + } \ + if (bottom_y) { \ + for (n = 0; n < (num_pixels); ++n) { \ + FUNC(bottom_y[(cur_x) + n], (uv)[64 + n], (uv)[64 + 32 + n], \ + bottom_dst + ((cur_x) + n) * XSTEP); \ + } \ + } \ +} + +#define SSE2_UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ +static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ + const uint8_t* top_u, const uint8_t* top_v, \ + const uint8_t* cur_u, const uint8_t* cur_v, \ + uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ + int b; \ + /* 16 byte aligned array to cache reconstructed u and v */ \ + uint8_t uv_buf[4 * 32 + 15]; \ + uint8_t* const r_uv = (uint8_t*)((uintptr_t)(uv_buf + 15) & ~15); \ + const int uv_len = (len + 1) >> 1; \ + /* 17 pixels must be read-able for each block */ \ + const int num_blocks = (uv_len - 1) >> 4; \ + const int leftover = uv_len - num_blocks * 16; \ + const int last_pos = 1 + 32 * num_blocks; \ + \ + const int u_diag = ((top_u[0] + cur_u[0]) >> 1) + 1; \ + const int v_diag = ((top_v[0] + cur_v[0]) >> 1) + 1; \ + \ + assert(len > 0); \ + /* Treat the first pixel in regular way */ \ + if (top_y) { \ + const int u0 = (top_u[0] + u_diag) >> 1; \ + const int v0 = (top_v[0] + v_diag) >> 1; \ + FUNC(top_y[0], u0, v0, top_dst); \ + } \ + if (bottom_y) { \ + const int u0 = (cur_u[0] + u_diag) >> 1; \ + const int v0 = (cur_v[0] + v_diag) >> 1; \ + FUNC(bottom_y[0], u0, v0, bottom_dst); \ + } \ + \ + for (b = 0; b < num_blocks; ++b) { \ + UPSAMPLE_32PIXELS(top_u, cur_u, r_uv + 0 * 32); \ + UPSAMPLE_32PIXELS(top_v, cur_v, r_uv + 1 * 32); \ + CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, r_uv, top_dst, bottom_dst, \ + 32 * b + 1, 32) \ + top_u += 16; \ + cur_u += 16; \ + top_v += 16; \ + cur_v += 16; \ + } \ + \ + UPSAMPLE_LAST_BLOCK(top_u, cur_u, leftover, r_uv + 0 * 32); \ + UPSAMPLE_LAST_BLOCK(top_v, cur_v, leftover, r_uv + 1 * 32); \ + CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, r_uv, top_dst, bottom_dst, \ + last_pos, len - last_pos); \ +} + +// SSE2 variants of the fancy upsampler. +SSE2_UPSAMPLE_FUNC(UpsampleRgbLinePairSSE2, VP8YuvToRgb, 3) +SSE2_UPSAMPLE_FUNC(UpsampleBgrLinePairSSE2, VP8YuvToBgr, 3) +SSE2_UPSAMPLE_FUNC(UpsampleRgbaLinePairSSE2, VP8YuvToRgba, 4) +SSE2_UPSAMPLE_FUNC(UpsampleBgraLinePairSSE2, VP8YuvToBgra, 4) + +#undef GET_M +#undef PACK_AND_STORE +#undef UPSAMPLE_32PIXELS +#undef UPSAMPLE_LAST_BLOCK +#undef CONVERT2RGB +#undef SSE2_UPSAMPLE_FUNC + +//------------------------------------------------------------------------------ + +extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; + +void WebPInitUpsamplersSSE2(void) { + WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePairSSE2; + WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePairSSE2; + WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePairSSE2; + WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePairSSE2; +} + +void WebPInitPremultiplySSE2(void) { + WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePairSSE2; + WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePairSSE2; +} + +#endif // FANCY_UPSAMPLING + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif // WEBP_USE_SSE2 diff --git a/drivers/webpold/dsp/yuv.c b/drivers/webpold/dsp/yuv.c new file mode 100644 index 0000000000..7f05f9a3aa --- /dev/null +++ b/drivers/webpold/dsp/yuv.c @@ -0,0 +1,52 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// YUV->RGB conversion function +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./yuv.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +enum { YUV_HALF = 1 << (YUV_FIX - 1) }; + +int16_t VP8kVToR[256], VP8kUToB[256]; +int32_t VP8kVToG[256], VP8kUToG[256]; +uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN]; +uint8_t VP8kClip4Bits[YUV_RANGE_MAX - YUV_RANGE_MIN]; + +static int done = 0; + +static WEBP_INLINE uint8_t clip(int v, int max_value) { + return v < 0 ? 0 : v > max_value ? max_value : v; +} + +void VP8YUVInit(void) { + int i; + if (done) { + return; + } + for (i = 0; i < 256; ++i) { + VP8kVToR[i] = (89858 * (i - 128) + YUV_HALF) >> YUV_FIX; + VP8kUToG[i] = -22014 * (i - 128) + YUV_HALF; + VP8kVToG[i] = -45773 * (i - 128); + VP8kUToB[i] = (113618 * (i - 128) + YUV_HALF) >> YUV_FIX; + } + for (i = YUV_RANGE_MIN; i < YUV_RANGE_MAX; ++i) { + const int k = ((i - 16) * 76283 + YUV_HALF) >> YUV_FIX; + VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255); + VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15); + } + done = 1; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/dsp/yuv.h b/drivers/webpold/dsp/yuv.h new file mode 100644 index 0000000000..a569109c54 --- /dev/null +++ b/drivers/webpold/dsp/yuv.h @@ -0,0 +1,128 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// inline YUV<->RGB conversion function +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_DSP_YUV_H_ +#define WEBP_DSP_YUV_H_ + +#include "../dec/decode_vp8.h" + +//------------------------------------------------------------------------------ +// YUV -> RGB conversion + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +enum { YUV_FIX = 16, // fixed-point precision + YUV_RANGE_MIN = -227, // min value of r/g/b output + YUV_RANGE_MAX = 256 + 226 // max value of r/g/b output +}; +extern int16_t VP8kVToR[256], VP8kUToB[256]; +extern int32_t VP8kVToG[256], VP8kUToG[256]; +extern uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN]; +extern uint8_t VP8kClip4Bits[YUV_RANGE_MAX - YUV_RANGE_MIN]; + +static WEBP_INLINE void VP8YuvToRgb(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const rgb) { + const int r_off = VP8kVToR[v]; + const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; + const int b_off = VP8kUToB[u]; + rgb[0] = VP8kClip[y + r_off - YUV_RANGE_MIN]; + rgb[1] = VP8kClip[y + g_off - YUV_RANGE_MIN]; + rgb[2] = VP8kClip[y + b_off - YUV_RANGE_MIN]; +} + +static WEBP_INLINE void VP8YuvToRgb565(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const rgb) { + const int r_off = VP8kVToR[v]; + const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; + const int b_off = VP8kUToB[u]; + rgb[0] = ((VP8kClip[y + r_off - YUV_RANGE_MIN] & 0xf8) | + (VP8kClip[y + g_off - YUV_RANGE_MIN] >> 5)); + rgb[1] = (((VP8kClip[y + g_off - YUV_RANGE_MIN] << 3) & 0xe0) | + (VP8kClip[y + b_off - YUV_RANGE_MIN] >> 3)); +} + +static WEBP_INLINE void VP8YuvToArgb(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const argb) { + argb[0] = 0xff; + VP8YuvToRgb(y, u, v, argb + 1); +} + +static WEBP_INLINE void VP8YuvToRgba4444(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const argb) { + const int r_off = VP8kVToR[v]; + const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; + const int b_off = VP8kUToB[u]; + // Don't update alpha (last 4 bits of argb[1]) + argb[0] = ((VP8kClip4Bits[y + r_off - YUV_RANGE_MIN] << 4) | + VP8kClip4Bits[y + g_off - YUV_RANGE_MIN]); + argb[1] = 0x0f | (VP8kClip4Bits[y + b_off - YUV_RANGE_MIN] << 4); +} + +static WEBP_INLINE void VP8YuvToBgr(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const bgr) { + const int r_off = VP8kVToR[v]; + const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; + const int b_off = VP8kUToB[u]; + bgr[0] = VP8kClip[y + b_off - YUV_RANGE_MIN]; + bgr[1] = VP8kClip[y + g_off - YUV_RANGE_MIN]; + bgr[2] = VP8kClip[y + r_off - YUV_RANGE_MIN]; +} + +static WEBP_INLINE void VP8YuvToBgra(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const bgra) { + VP8YuvToBgr(y, u, v, bgra); + bgra[3] = 0xff; +} + +static WEBP_INLINE void VP8YuvToRgba(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const rgba) { + VP8YuvToRgb(y, u, v, rgba); + rgba[3] = 0xff; +} + +// Must be called before everything, to initialize the tables. +void VP8YUVInit(void); + +//------------------------------------------------------------------------------ +// RGB -> YUV conversion +// The exact naming is Y'CbCr, following the ITU-R BT.601 standard. +// More information at: http://en.wikipedia.org/wiki/YCbCr +// Y = 0.2569 * R + 0.5044 * G + 0.0979 * B + 16 +// U = -0.1483 * R - 0.2911 * G + 0.4394 * B + 128 +// V = 0.4394 * R - 0.3679 * G - 0.0715 * B + 128 +// We use 16bit fixed point operations. + +static WEBP_INLINE int VP8ClipUV(int v) { + v = (v + (257 << (YUV_FIX + 2 - 1))) >> (YUV_FIX + 2); + return ((v & ~0xff) == 0) ? v : (v < 0) ? 0 : 255; +} + +static WEBP_INLINE int VP8RGBToY(int r, int g, int b) { + const int kRound = (1 << (YUV_FIX - 1)) + (16 << YUV_FIX); + const int luma = 16839 * r + 33059 * g + 6420 * b; + return (luma + kRound) >> YUV_FIX; // no need to clip +} + +static WEBP_INLINE int VP8RGBToU(int r, int g, int b) { + return VP8ClipUV(-9719 * r - 19081 * g + 28800 * b); +} + +static WEBP_INLINE int VP8RGBToV(int r, int g, int b) { + return VP8ClipUV(+28800 * r - 24116 * g - 4684 * b); +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_DSP_YUV_H_ */ diff --git a/drivers/webpold/enc/alpha.c b/drivers/webpold/enc/alpha.c new file mode 100644 index 0000000000..e554eb7f30 --- /dev/null +++ b/drivers/webpold/enc/alpha.c @@ -0,0 +1,330 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Alpha-plane compression. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> + +#include "./vp8enci.h" +#include "../utils/filters.h" +#include "../utils/quant_levels.h" +#include "../format_constants.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// ----------------------------------------------------------------------------- +// Encodes the given alpha data via specified compression method 'method'. +// The pre-processing (quantization) is performed if 'quality' is less than 100. +// For such cases, the encoding is lossy. The valid range is [0, 100] for +// 'quality' and [0, 1] for 'method': +// 'method = 0' - No compression; +// 'method = 1' - Use lossless coder on the alpha plane only +// 'filter' values [0, 4] correspond to prediction modes none, horizontal, +// vertical & gradient filters. The prediction mode 4 will try all the +// prediction modes 0 to 3 and pick the best one. +// 'effort_level': specifies how much effort must be spent to try and reduce +// the compressed output size. In range 0 (quick) to 6 (slow). +// +// 'output' corresponds to the buffer containing compressed alpha data. +// This buffer is allocated by this method and caller should call +// free(*output) when done. +// 'output_size' corresponds to size of this compressed alpha buffer. +// +// Returns 1 on successfully encoding the alpha and +// 0 if either: +// invalid quality or method, or +// memory allocation for the compressed data fails. + +#include "../enc/vp8li.h" + +static int EncodeLossless(const uint8_t* const data, int width, int height, + int effort_level, // in [0..6] range + VP8BitWriter* const bw, + WebPAuxStats* const stats) { + int ok = 0; + WebPConfig config; + WebPPicture picture; + VP8LBitWriter tmp_bw; + + WebPPictureInit(&picture); + picture.width = width; + picture.height = height; + picture.use_argb = 1; + picture.stats = stats; + if (!WebPPictureAlloc(&picture)) return 0; + + // Transfer the alpha values to the green channel. + { + int i, j; + uint32_t* dst = picture.argb; + const uint8_t* src = data; + for (j = 0; j < picture.height; ++j) { + for (i = 0; i < picture.width; ++i) { + dst[i] = (src[i] << 8) | 0xff000000u; + } + src += width; + dst += picture.argb_stride; + } + } + + WebPConfigInit(&config); + config.lossless = 1; + config.method = effort_level; // impact is very small + // Set moderate default quality setting for alpha. Higher qualities (80 and + // above) could be very slow. + config.quality = 10.f + 15.f * effort_level; + if (config.quality > 100.f) config.quality = 100.f; + + ok = VP8LBitWriterInit(&tmp_bw, (width * height) >> 3); + ok = ok && (VP8LEncodeStream(&config, &picture, &tmp_bw) == VP8_ENC_OK); + WebPPictureFree(&picture); + if (ok) { + const uint8_t* const data = VP8LBitWriterFinish(&tmp_bw); + const size_t data_size = VP8LBitWriterNumBytes(&tmp_bw); + VP8BitWriterAppend(bw, data, data_size); + } + VP8LBitWriterDestroy(&tmp_bw); + return ok && !bw->error_; +} + +// ----------------------------------------------------------------------------- + +static int EncodeAlphaInternal(const uint8_t* const data, int width, int height, + int method, int filter, int reduce_levels, + int effort_level, // in [0..6] range + uint8_t* const tmp_alpha, + VP8BitWriter* const bw, + WebPAuxStats* const stats) { + int ok = 0; + const uint8_t* alpha_src; + WebPFilterFunc filter_func; + uint8_t header; + size_t expected_size; + const size_t data_size = width * height; + + assert((uint64_t)data_size == (uint64_t)width * height); // as per spec + assert(filter >= 0 && filter < WEBP_FILTER_LAST); + assert(method >= ALPHA_NO_COMPRESSION); + assert(method <= ALPHA_LOSSLESS_COMPRESSION); + assert(sizeof(header) == ALPHA_HEADER_LEN); + // TODO(skal): have a common function and #define's to validate alpha params. + + expected_size = + (method == ALPHA_NO_COMPRESSION) ? (ALPHA_HEADER_LEN + data_size) + : (data_size >> 5); + header = method | (filter << 2); + if (reduce_levels) header |= ALPHA_PREPROCESSED_LEVELS << 4; + + VP8BitWriterInit(bw, expected_size); + VP8BitWriterAppend(bw, &header, ALPHA_HEADER_LEN); + + filter_func = WebPFilters[filter]; + if (filter_func) { + filter_func(data, width, height, 1, width, tmp_alpha); + alpha_src = tmp_alpha; + } else { + alpha_src = data; + } + + if (method == ALPHA_NO_COMPRESSION) { + ok = VP8BitWriterAppend(bw, alpha_src, width * height); + ok = ok && !bw->error_; + } else { + ok = EncodeLossless(alpha_src, width, height, effort_level, bw, stats); + VP8BitWriterFinish(bw); + } + return ok; +} + +// ----------------------------------------------------------------------------- + +// TODO(skal): move to dsp/ ? +static void CopyPlane(const uint8_t* src, int src_stride, + uint8_t* dst, int dst_stride, int width, int height) { + while (height-- > 0) { + memcpy(dst, src, width); + src += src_stride; + dst += dst_stride; + } +} + +static int EncodeAlpha(VP8Encoder* const enc, + int quality, int method, int filter, + int effort_level, + uint8_t** const output, size_t* const output_size) { + const WebPPicture* const pic = enc->pic_; + const int width = pic->width; + const int height = pic->height; + + uint8_t* quant_alpha = NULL; + const size_t data_size = width * height; + uint64_t sse = 0; + int ok = 1; + const int reduce_levels = (quality < 100); + + // quick sanity checks + assert((uint64_t)data_size == (uint64_t)width * height); // as per spec + assert(enc != NULL && pic != NULL && pic->a != NULL); + assert(output != NULL && output_size != NULL); + assert(width > 0 && height > 0); + assert(pic->a_stride >= width); + assert(filter >= WEBP_FILTER_NONE && filter <= WEBP_FILTER_FAST); + + if (quality < 0 || quality > 100) { + return 0; + } + + if (method < ALPHA_NO_COMPRESSION || method > ALPHA_LOSSLESS_COMPRESSION) { + return 0; + } + + quant_alpha = (uint8_t*)malloc(data_size); + if (quant_alpha == NULL) { + return 0; + } + + // Extract alpha data (width x height) from raw_data (stride x height). + CopyPlane(pic->a, pic->a_stride, quant_alpha, width, width, height); + + if (reduce_levels) { // No Quantization required for 'quality = 100'. + // 16 alpha levels gives quite a low MSE w.r.t original alpha plane hence + // mapped to moderate quality 70. Hence Quality:[0, 70] -> Levels:[2, 16] + // and Quality:]70, 100] -> Levels:]16, 256]. + const int alpha_levels = (quality <= 70) ? (2 + quality / 5) + : (16 + (quality - 70) * 8); + ok = QuantizeLevels(quant_alpha, width, height, alpha_levels, &sse); + } + + if (ok) { + VP8BitWriter bw; + int test_filter; + uint8_t* filtered_alpha = NULL; + + // We always test WEBP_FILTER_NONE first. + ok = EncodeAlphaInternal(quant_alpha, width, height, + method, WEBP_FILTER_NONE, reduce_levels, + effort_level, NULL, &bw, pic->stats); + if (!ok) { + VP8BitWriterWipeOut(&bw); + goto End; + } + + if (filter == WEBP_FILTER_FAST) { // Quick estimate of a second candidate? + filter = EstimateBestFilter(quant_alpha, width, height, width); + } + // Stop? + if (filter == WEBP_FILTER_NONE) { + goto Ok; + } + + filtered_alpha = (uint8_t*)malloc(data_size); + ok = (filtered_alpha != NULL); + if (!ok) { + goto End; + } + + // Try the other mode(s). + { + WebPAuxStats best_stats; + size_t best_score = VP8BitWriterSize(&bw); + + memset(&best_stats, 0, sizeof(best_stats)); // prevent spurious warning + if (pic->stats != NULL) best_stats = *pic->stats; + for (test_filter = WEBP_FILTER_HORIZONTAL; + ok && (test_filter <= WEBP_FILTER_GRADIENT); + ++test_filter) { + VP8BitWriter tmp_bw; + if (filter != WEBP_FILTER_BEST && test_filter != filter) { + continue; + } + ok = EncodeAlphaInternal(quant_alpha, width, height, + method, test_filter, reduce_levels, + effort_level, filtered_alpha, &tmp_bw, + pic->stats); + if (ok) { + const size_t score = VP8BitWriterSize(&tmp_bw); + if (score < best_score) { + // swap bitwriter objects. + VP8BitWriter tmp = tmp_bw; + tmp_bw = bw; + bw = tmp; + best_score = score; + if (pic->stats != NULL) best_stats = *pic->stats; + } + } else { + VP8BitWriterWipeOut(&bw); + } + VP8BitWriterWipeOut(&tmp_bw); + } + if (pic->stats != NULL) *pic->stats = best_stats; + } + Ok: + if (ok) { + *output_size = VP8BitWriterSize(&bw); + *output = VP8BitWriterBuf(&bw); + if (pic->stats != NULL) { // need stats? + pic->stats->coded_size += (int)(*output_size); + enc->sse_[3] = sse; + } + } + free(filtered_alpha); + } + End: + free(quant_alpha); + return ok; +} + + +//------------------------------------------------------------------------------ +// Main calls + +void VP8EncInitAlpha(VP8Encoder* const enc) { + enc->has_alpha_ = WebPPictureHasTransparency(enc->pic_); + enc->alpha_data_ = NULL; + enc->alpha_data_size_ = 0; +} + +int VP8EncFinishAlpha(VP8Encoder* const enc) { + if (enc->has_alpha_) { + const WebPConfig* config = enc->config_; + uint8_t* tmp_data = NULL; + size_t tmp_size = 0; + const int effort_level = config->method; // maps to [0..6] + const WEBP_FILTER_TYPE filter = + (config->alpha_filtering == 0) ? WEBP_FILTER_NONE : + (config->alpha_filtering == 1) ? WEBP_FILTER_FAST : + WEBP_FILTER_BEST; + + if (!EncodeAlpha(enc, config->alpha_quality, config->alpha_compression, + filter, effort_level, &tmp_data, &tmp_size)) { + return 0; + } + if (tmp_size != (uint32_t)tmp_size) { // Sanity check. + free(tmp_data); + return 0; + } + enc->alpha_data_size_ = (uint32_t)tmp_size; + enc->alpha_data_ = tmp_data; + } + return WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_); +} + +void VP8EncDeleteAlpha(VP8Encoder* const enc) { + free(enc->alpha_data_); + enc->alpha_data_ = NULL; + enc->alpha_data_size_ = 0; + enc->has_alpha_ = 0; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/analysis.c b/drivers/webpold/enc/analysis.c new file mode 100644 index 0000000000..22cfb492e7 --- /dev/null +++ b/drivers/webpold/enc/analysis.c @@ -0,0 +1,364 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Macroblock analysis +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> +#include <string.h> +#include <assert.h> + +#include "./vp8enci.h" +#include "./cost.h" +#include "../utils/utils.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define MAX_ITERS_K_MEANS 6 + +static int ClipAlpha(int alpha) { + return alpha < 0 ? 0 : alpha > 255 ? 255 : alpha; +} + +//------------------------------------------------------------------------------ +// Smooth the segment map by replacing isolated block by the majority of its +// neighbours. + +static void SmoothSegmentMap(VP8Encoder* const enc) { + int n, x, y; + const int w = enc->mb_w_; + const int h = enc->mb_h_; + const int majority_cnt_3_x_3_grid = 5; + uint8_t* const tmp = (uint8_t*)WebPSafeMalloc((uint64_t)w * h, sizeof(*tmp)); + assert((uint64_t)(w * h) == (uint64_t)w * h); // no overflow, as per spec + + if (tmp == NULL) return; + for (y = 1; y < h - 1; ++y) { + for (x = 1; x < w - 1; ++x) { + int cnt[NUM_MB_SEGMENTS] = { 0 }; + const VP8MBInfo* const mb = &enc->mb_info_[x + w * y]; + int majority_seg = mb->segment_; + // Check the 8 neighbouring segment values. + cnt[mb[-w - 1].segment_]++; // top-left + cnt[mb[-w + 0].segment_]++; // top + cnt[mb[-w + 1].segment_]++; // top-right + cnt[mb[ - 1].segment_]++; // left + cnt[mb[ + 1].segment_]++; // right + cnt[mb[ w - 1].segment_]++; // bottom-left + cnt[mb[ w + 0].segment_]++; // bottom + cnt[mb[ w + 1].segment_]++; // bottom-right + for (n = 0; n < NUM_MB_SEGMENTS; ++n) { + if (cnt[n] >= majority_cnt_3_x_3_grid) { + majority_seg = n; + } + } + tmp[x + y * w] = majority_seg; + } + } + for (y = 1; y < h - 1; ++y) { + for (x = 1; x < w - 1; ++x) { + VP8MBInfo* const mb = &enc->mb_info_[x + w * y]; + mb->segment_ = tmp[x + y * w]; + } + } + free(tmp); +} + +//------------------------------------------------------------------------------ +// Finalize Segment probability based on the coding tree + +static int GetProba(int a, int b) { + int proba; + const int total = a + b; + if (total == 0) return 255; // that's the default probability. + proba = (255 * a + total / 2) / total; + return proba; +} + +static void SetSegmentProbas(VP8Encoder* const enc) { + int p[NUM_MB_SEGMENTS] = { 0 }; + int n; + + for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) { + const VP8MBInfo* const mb = &enc->mb_info_[n]; + p[mb->segment_]++; + } + if (enc->pic_->stats) { + for (n = 0; n < NUM_MB_SEGMENTS; ++n) { + enc->pic_->stats->segment_size[n] = p[n]; + } + } + if (enc->segment_hdr_.num_segments_ > 1) { + uint8_t* const probas = enc->proba_.segments_; + probas[0] = GetProba(p[0] + p[1], p[2] + p[3]); + probas[1] = GetProba(p[0], p[1]); + probas[2] = GetProba(p[2], p[3]); + + enc->segment_hdr_.update_map_ = + (probas[0] != 255) || (probas[1] != 255) || (probas[2] != 255); + enc->segment_hdr_.size_ = + p[0] * (VP8BitCost(0, probas[0]) + VP8BitCost(0, probas[1])) + + p[1] * (VP8BitCost(0, probas[0]) + VP8BitCost(1, probas[1])) + + p[2] * (VP8BitCost(1, probas[0]) + VP8BitCost(0, probas[2])) + + p[3] * (VP8BitCost(1, probas[0]) + VP8BitCost(1, probas[2])); + } else { + enc->segment_hdr_.update_map_ = 0; + enc->segment_hdr_.size_ = 0; + } +} + +static WEBP_INLINE int clip(int v, int m, int M) { + return v < m ? m : v > M ? M : v; +} + +static void SetSegmentAlphas(VP8Encoder* const enc, + const int centers[NUM_MB_SEGMENTS], + int mid) { + const int nb = enc->segment_hdr_.num_segments_; + int min = centers[0], max = centers[0]; + int n; + + if (nb > 1) { + for (n = 0; n < nb; ++n) { + if (min > centers[n]) min = centers[n]; + if (max < centers[n]) max = centers[n]; + } + } + if (max == min) max = min + 1; + assert(mid <= max && mid >= min); + for (n = 0; n < nb; ++n) { + const int alpha = 255 * (centers[n] - mid) / (max - min); + const int beta = 255 * (centers[n] - min) / (max - min); + enc->dqm_[n].alpha_ = clip(alpha, -127, 127); + enc->dqm_[n].beta_ = clip(beta, 0, 255); + } +} + +//------------------------------------------------------------------------------ +// Simplified k-Means, to assign Nb segments based on alpha-histogram + +static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { + const int nb = enc->segment_hdr_.num_segments_; + int centers[NUM_MB_SEGMENTS]; + int weighted_average = 0; + int map[256]; + int a, n, k; + int min_a = 0, max_a = 255, range_a; + // 'int' type is ok for histo, and won't overflow + int accum[NUM_MB_SEGMENTS], dist_accum[NUM_MB_SEGMENTS]; + + // bracket the input + for (n = 0; n < 256 && alphas[n] == 0; ++n) {} + min_a = n; + for (n = 255; n > min_a && alphas[n] == 0; --n) {} + max_a = n; + range_a = max_a - min_a; + + // Spread initial centers evenly + for (n = 1, k = 0; n < 2 * nb; n += 2) { + centers[k++] = min_a + (n * range_a) / (2 * nb); + } + + for (k = 0; k < MAX_ITERS_K_MEANS; ++k) { // few iters are enough + int total_weight; + int displaced; + // Reset stats + for (n = 0; n < nb; ++n) { + accum[n] = 0; + dist_accum[n] = 0; + } + // Assign nearest center for each 'a' + n = 0; // track the nearest center for current 'a' + for (a = min_a; a <= max_a; ++a) { + if (alphas[a]) { + while (n < nb - 1 && abs(a - centers[n + 1]) < abs(a - centers[n])) { + n++; + } + map[a] = n; + // accumulate contribution into best centroid + dist_accum[n] += a * alphas[a]; + accum[n] += alphas[a]; + } + } + // All point are classified. Move the centroids to the + // center of their respective cloud. + displaced = 0; + weighted_average = 0; + total_weight = 0; + for (n = 0; n < nb; ++n) { + if (accum[n]) { + const int new_center = (dist_accum[n] + accum[n] / 2) / accum[n]; + displaced += abs(centers[n] - new_center); + centers[n] = new_center; + weighted_average += new_center * accum[n]; + total_weight += accum[n]; + } + } + weighted_average = (weighted_average + total_weight / 2) / total_weight; + if (displaced < 5) break; // no need to keep on looping... + } + + // Map each original value to the closest centroid + for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) { + VP8MBInfo* const mb = &enc->mb_info_[n]; + const int alpha = mb->alpha_; + mb->segment_ = map[alpha]; + mb->alpha_ = centers[map[alpha]]; // just for the record. + } + + if (nb > 1) { + const int smooth = (enc->config_->preprocessing & 1); + if (smooth) SmoothSegmentMap(enc); + } + + SetSegmentProbas(enc); // Assign final proba + SetSegmentAlphas(enc, centers, weighted_average); // pick some alphas. +} + +//------------------------------------------------------------------------------ +// Macroblock analysis: collect histogram for each mode, deduce the maximal +// susceptibility and set best modes for this macroblock. +// Segment assignment is done later. + +// Number of modes to inspect for alpha_ evaluation. For high-quality settings, +// we don't need to test all the possible modes during the analysis phase. +#define MAX_INTRA16_MODE 2 +#define MAX_INTRA4_MODE 2 +#define MAX_UV_MODE 2 + +static int MBAnalyzeBestIntra16Mode(VP8EncIterator* const it) { + const int max_mode = (it->enc_->method_ >= 3) ? MAX_INTRA16_MODE : 4; + int mode; + int best_alpha = -1; + int best_mode = 0; + + VP8MakeLuma16Preds(it); + for (mode = 0; mode < max_mode; ++mode) { + const int alpha = VP8CollectHistogram(it->yuv_in_ + Y_OFF, + it->yuv_p_ + VP8I16ModeOffsets[mode], + 0, 16); + if (alpha > best_alpha) { + best_alpha = alpha; + best_mode = mode; + } + } + VP8SetIntra16Mode(it, best_mode); + return best_alpha; +} + +static int MBAnalyzeBestIntra4Mode(VP8EncIterator* const it, + int best_alpha) { + uint8_t modes[16]; + const int max_mode = (it->enc_->method_ >= 3) ? MAX_INTRA4_MODE : NUM_BMODES; + int i4_alpha = 0; + VP8IteratorStartI4(it); + do { + int mode; + int best_mode_alpha = -1; + const uint8_t* const src = it->yuv_in_ + Y_OFF + VP8Scan[it->i4_]; + + VP8MakeIntra4Preds(it); + for (mode = 0; mode < max_mode; ++mode) { + const int alpha = VP8CollectHistogram(src, + it->yuv_p_ + VP8I4ModeOffsets[mode], + 0, 1); + if (alpha > best_mode_alpha) { + best_mode_alpha = alpha; + modes[it->i4_] = mode; + } + } + i4_alpha += best_mode_alpha; + // Note: we reuse the original samples for predictors + } while (VP8IteratorRotateI4(it, it->yuv_in_ + Y_OFF)); + + if (i4_alpha > best_alpha) { + VP8SetIntra4Mode(it, modes); + best_alpha = ClipAlpha(i4_alpha); + } + return best_alpha; +} + +static int MBAnalyzeBestUVMode(VP8EncIterator* const it) { + int best_alpha = -1; + int best_mode = 0; + const int max_mode = (it->enc_->method_ >= 3) ? MAX_UV_MODE : 4; + int mode; + VP8MakeChroma8Preds(it); + for (mode = 0; mode < max_mode; ++mode) { + const int alpha = VP8CollectHistogram(it->yuv_in_ + U_OFF, + it->yuv_p_ + VP8UVModeOffsets[mode], + 16, 16 + 4 + 4); + if (alpha > best_alpha) { + best_alpha = alpha; + best_mode = mode; + } + } + VP8SetIntraUVMode(it, best_mode); + return best_alpha; +} + +static void MBAnalyze(VP8EncIterator* const it, + int alphas[256], int* const uv_alpha) { + const VP8Encoder* const enc = it->enc_; + int best_alpha, best_uv_alpha; + + VP8SetIntra16Mode(it, 0); // default: Intra16, DC_PRED + VP8SetSkip(it, 0); // not skipped + VP8SetSegment(it, 0); // default segment, spec-wise. + + best_alpha = MBAnalyzeBestIntra16Mode(it); + if (enc->method_ != 3) { + // We go and make a fast decision for intra4/intra16. + // It's usually not a good and definitive pick, but helps seeding the stats + // about level bit-cost. + // TODO(skal): improve criterion. + best_alpha = MBAnalyzeBestIntra4Mode(it, best_alpha); + } + best_uv_alpha = MBAnalyzeBestUVMode(it); + + // Final susceptibility mix + best_alpha = (best_alpha + best_uv_alpha + 1) / 2; + alphas[best_alpha]++; + *uv_alpha += best_uv_alpha; + it->mb_->alpha_ = best_alpha; // Informative only. +} + +//------------------------------------------------------------------------------ +// Main analysis loop: +// Collect all susceptibilities for each macroblock and record their +// distribution in alphas[]. Segments is assigned a-posteriori, based on +// this histogram. +// We also pick an intra16 prediction mode, which shouldn't be considered +// final except for fast-encode settings. We can also pick some intra4 modes +// and decide intra4/intra16, but that's usually almost always a bad choice at +// this stage. + +int VP8EncAnalyze(VP8Encoder* const enc) { + int ok = 1; + int alphas[256] = { 0 }; + VP8EncIterator it; + + VP8IteratorInit(enc, &it); + enc->uv_alpha_ = 0; + do { + VP8IteratorImport(&it); + MBAnalyze(&it, alphas, &enc->uv_alpha_); + ok = VP8IteratorProgress(&it, 20); + // Let's pretend we have perfect lossless reconstruction. + } while (ok && VP8IteratorNext(&it, it.yuv_in_)); + enc->uv_alpha_ /= enc->mb_w_ * enc->mb_h_; + if (ok) AssignSegments(enc, alphas); + + return ok; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/backward_references.c b/drivers/webpold/enc/backward_references.c new file mode 100644 index 0000000000..b8c8ece806 --- /dev/null +++ b/drivers/webpold/enc/backward_references.c @@ -0,0 +1,874 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Author: Jyrki Alakuijala (jyrki@google.com) +// + +#include <assert.h> +#include <math.h> +#include <stdio.h> + +#include "./backward_references.h" +#include "./histogram.h" +#include "../dsp/lossless.h" +#include "../utils/color_cache.h" +#include "../utils/utils.h" + +#define VALUES_IN_BYTE 256 + +#define HASH_BITS 18 +#define HASH_SIZE (1 << HASH_BITS) +#define HASH_MULTIPLIER (0xc6a4a7935bd1e995ULL) + +// 1M window (4M bytes) minus 120 special codes for short distances. +#define WINDOW_SIZE ((1 << 20) - 120) + +// Bounds for the match length. +#define MIN_LENGTH 2 +#define MAX_LENGTH 4096 + +typedef struct { + // Stores the most recently added position with the given hash value. + int32_t hash_to_first_index_[HASH_SIZE]; + // chain_[pos] stores the previous position with the same hash value + // for every pixel in the image. + int32_t* chain_; +} HashChain; + +// ----------------------------------------------------------------------------- + +static const uint8_t plane_to_code_lut[128] = { + 96, 73, 55, 39, 23, 13, 5, 1, 255, 255, 255, 255, 255, 255, 255, 255, + 101, 78, 58, 42, 26, 16, 8, 2, 0, 3, 9, 17, 27, 43, 59, 79, + 102, 86, 62, 46, 32, 20, 10, 6, 4, 7, 11, 21, 33, 47, 63, 87, + 105, 90, 70, 52, 37, 28, 18, 14, 12, 15, 19, 29, 38, 53, 71, 91, + 110, 99, 82, 66, 48, 35, 30, 24, 22, 25, 31, 36, 49, 67, 83, 100, + 115, 108, 94, 76, 64, 50, 44, 40, 34, 41, 45, 51, 65, 77, 95, 109, + 118, 113, 103, 92, 80, 68, 60, 56, 54, 57, 61, 69, 81, 93, 104, 114, + 119, 116, 111, 106, 97, 88, 84, 74, 72, 75, 85, 89, 98, 107, 112, 117 +}; + +static int DistanceToPlaneCode(int xsize, int dist) { + const int yoffset = dist / xsize; + const int xoffset = dist - yoffset * xsize; + if (xoffset <= 8 && yoffset < 8) { + return plane_to_code_lut[yoffset * 16 + 8 - xoffset] + 1; + } else if (xoffset > xsize - 8 && yoffset < 7) { + return plane_to_code_lut[(yoffset + 1) * 16 + 8 + (xsize - xoffset)] + 1; + } + return dist + 120; +} + +static WEBP_INLINE int FindMatchLength(const uint32_t* const array1, + const uint32_t* const array2, + const int max_limit) { + int match_len = 0; + while (match_len < max_limit && array1[match_len] == array2[match_len]) { + ++match_len; + } + return match_len; +} + +// ----------------------------------------------------------------------------- +// VP8LBackwardRefs + +void VP8LInitBackwardRefs(VP8LBackwardRefs* const refs) { + if (refs != NULL) { + refs->refs = NULL; + refs->size = 0; + refs->max_size = 0; + } +} + +void VP8LClearBackwardRefs(VP8LBackwardRefs* const refs) { + if (refs != NULL) { + free(refs->refs); + VP8LInitBackwardRefs(refs); + } +} + +int VP8LBackwardRefsAlloc(VP8LBackwardRefs* const refs, int max_size) { + assert(refs != NULL); + refs->size = 0; + refs->max_size = 0; + refs->refs = (PixOrCopy*)WebPSafeMalloc((uint64_t)max_size, + sizeof(*refs->refs)); + if (refs->refs == NULL) return 0; + refs->max_size = max_size; + return 1; +} + +// ----------------------------------------------------------------------------- +// Hash chains + +static WEBP_INLINE uint64_t GetPixPairHash64(const uint32_t* const argb) { + uint64_t key = ((uint64_t)(argb[1]) << 32) | argb[0]; + key = (key * HASH_MULTIPLIER) >> (64 - HASH_BITS); + return key; +} + +static int HashChainInit(HashChain* const p, int size) { + int i; + p->chain_ = (int*)WebPSafeMalloc((uint64_t)size, sizeof(*p->chain_)); + if (p->chain_ == NULL) { + return 0; + } + for (i = 0; i < size; ++i) { + p->chain_[i] = -1; + } + for (i = 0; i < HASH_SIZE; ++i) { + p->hash_to_first_index_[i] = -1; + } + return 1; +} + +static void HashChainDelete(HashChain* const p) { + if (p != NULL) { + free(p->chain_); + free(p); + } +} + +// Insertion of two pixels at a time. +static void HashChainInsert(HashChain* const p, + const uint32_t* const argb, int pos) { + const uint64_t hash_code = GetPixPairHash64(argb); + p->chain_[pos] = p->hash_to_first_index_[hash_code]; + p->hash_to_first_index_[hash_code] = pos; +} + +static int HashChainFindCopy(const HashChain* const p, + int quality, int index, int xsize, + const uint32_t* const argb, int maxlen, + int* const distance_ptr, + int* const length_ptr) { + const uint64_t hash_code = GetPixPairHash64(&argb[index]); + int prev_length = 0; + int64_t best_val = 0; + int best_length = 0; + int best_distance = 0; + const uint32_t* const argb_start = argb + index; + const int iter_min_mult = (quality < 50) ? 2 : (quality < 75) ? 4 : 8; + const int iter_min = -quality * iter_min_mult; + int iter_cnt = 10 + (quality >> 1); + const int min_pos = (index > WINDOW_SIZE) ? index - WINDOW_SIZE : 0; + int pos; + + assert(xsize > 0); + for (pos = p->hash_to_first_index_[hash_code]; + pos >= min_pos; + pos = p->chain_[pos]) { + int64_t val; + int curr_length; + if (iter_cnt < 0) { + if (iter_cnt < iter_min || best_val >= 0xff0000) { + break; + } + } + --iter_cnt; + if (best_length != 0 && + argb[pos + best_length - 1] != argb_start[best_length - 1]) { + continue; + } + curr_length = FindMatchLength(argb + pos, argb_start, maxlen); + if (curr_length < prev_length) { + continue; + } + val = 65536 * curr_length; + // Favoring 2d locality here gives savings for certain images. + if (index - pos < 9 * xsize) { + const int y = (index - pos) / xsize; + int x = (index - pos) % xsize; + if (x > xsize / 2) { + x = xsize - x; + } + if (x <= 7 && x >= -8) { + val -= y * y + x * x; + } else { + val -= 9 * 9 + 9 * 9; + } + } else { + val -= 9 * 9 + 9 * 9; + } + if (best_val < val) { + prev_length = curr_length; + best_val = val; + best_length = curr_length; + best_distance = index - pos; + if (curr_length >= MAX_LENGTH) { + break; + } + if ((best_distance == 1 || best_distance == xsize) && + best_length >= 128) { + break; + } + } + } + *distance_ptr = best_distance; + *length_ptr = best_length; + return (best_length >= MIN_LENGTH); +} + +static WEBP_INLINE void PushBackCopy(VP8LBackwardRefs* const refs, int length) { + int size = refs->size; + while (length >= MAX_LENGTH) { + refs->refs[size++] = PixOrCopyCreateCopy(1, MAX_LENGTH); + length -= MAX_LENGTH; + } + if (length > 0) { + refs->refs[size++] = PixOrCopyCreateCopy(1, length); + } + refs->size = size; +} + +static void BackwardReferencesRle(int xsize, int ysize, + const uint32_t* const argb, + VP8LBackwardRefs* const refs) { + const int pix_count = xsize * ysize; + int match_len = 0; + int i; + refs->size = 0; + PushBackCopy(refs, match_len); // i=0 case + refs->refs[refs->size++] = PixOrCopyCreateLiteral(argb[0]); + for (i = 1; i < pix_count; ++i) { + if (argb[i] == argb[i - 1]) { + ++match_len; + } else { + PushBackCopy(refs, match_len); + match_len = 0; + refs->refs[refs->size++] = PixOrCopyCreateLiteral(argb[i]); + } + } + PushBackCopy(refs, match_len); +} + +static int BackwardReferencesHashChain(int xsize, int ysize, + const uint32_t* const argb, + int cache_bits, int quality, + VP8LBackwardRefs* const refs) { + int i; + int ok = 0; + int cc_init = 0; + const int use_color_cache = (cache_bits > 0); + const int pix_count = xsize * ysize; + HashChain* const hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); + VP8LColorCache hashers; + + if (hash_chain == NULL) return 0; + if (use_color_cache) { + cc_init = VP8LColorCacheInit(&hashers, cache_bits); + if (!cc_init) goto Error; + } + + if (!HashChainInit(hash_chain, pix_count)) goto Error; + + refs->size = 0; + for (i = 0; i < pix_count; ) { + // Alternative#1: Code the pixels starting at 'i' using backward reference. + int offset = 0; + int len = 0; + if (i < pix_count - 1) { // FindCopy(i,..) reads pixels at [i] and [i + 1]. + int maxlen = pix_count - i; + if (maxlen > MAX_LENGTH) { + maxlen = MAX_LENGTH; + } + HashChainFindCopy(hash_chain, quality, i, xsize, argb, maxlen, + &offset, &len); + } + if (len >= MIN_LENGTH) { + // Alternative#2: Insert the pixel at 'i' as literal, and code the + // pixels starting at 'i + 1' using backward reference. + int offset2 = 0; + int len2 = 0; + int k; + HashChainInsert(hash_chain, &argb[i], i); + if (i < pix_count - 2) { // FindCopy(i+1,..) reads [i + 1] and [i + 2]. + int maxlen = pix_count - (i + 1); + if (maxlen > MAX_LENGTH) { + maxlen = MAX_LENGTH; + } + HashChainFindCopy(hash_chain, quality, + i + 1, xsize, argb, maxlen, &offset2, &len2); + if (len2 > len + 1) { + const uint32_t pixel = argb[i]; + // Alternative#2 is a better match. So push pixel at 'i' as literal. + if (use_color_cache && VP8LColorCacheContains(&hashers, pixel)) { + const int ix = VP8LColorCacheGetIndex(&hashers, pixel); + refs->refs[refs->size] = PixOrCopyCreateCacheIdx(ix); + } else { + refs->refs[refs->size] = PixOrCopyCreateLiteral(pixel); + } + ++refs->size; + if (use_color_cache) VP8LColorCacheInsert(&hashers, pixel); + i++; // Backward reference to be done for next pixel. + len = len2; + offset = offset2; + } + } + if (len >= MAX_LENGTH) { + len = MAX_LENGTH - 1; + } + refs->refs[refs->size++] = PixOrCopyCreateCopy(offset, len); + if (use_color_cache) { + for (k = 0; k < len; ++k) { + VP8LColorCacheInsert(&hashers, argb[i + k]); + } + } + // Add to the hash_chain (but cannot add the last pixel). + { + const int last = (len < pix_count - 1 - i) ? len : pix_count - 1 - i; + for (k = 1; k < last; ++k) { + HashChainInsert(hash_chain, &argb[i + k], i + k); + } + } + i += len; + } else { + const uint32_t pixel = argb[i]; + if (use_color_cache && VP8LColorCacheContains(&hashers, pixel)) { + // push pixel as a PixOrCopyCreateCacheIdx pixel + const int ix = VP8LColorCacheGetIndex(&hashers, pixel); + refs->refs[refs->size] = PixOrCopyCreateCacheIdx(ix); + } else { + refs->refs[refs->size] = PixOrCopyCreateLiteral(pixel); + } + ++refs->size; + if (use_color_cache) VP8LColorCacheInsert(&hashers, pixel); + if (i + 1 < pix_count) { + HashChainInsert(hash_chain, &argb[i], i); + } + ++i; + } + } + ok = 1; +Error: + if (cc_init) VP8LColorCacheClear(&hashers); + HashChainDelete(hash_chain); + return ok; +} + +// ----------------------------------------------------------------------------- + +typedef struct { + double alpha_[VALUES_IN_BYTE]; + double red_[VALUES_IN_BYTE]; + double literal_[PIX_OR_COPY_CODES_MAX]; + double blue_[VALUES_IN_BYTE]; + double distance_[NUM_DISTANCE_CODES]; +} CostModel; + +static int BackwardReferencesTraceBackwards( + int xsize, int ysize, int recursive_cost_model, + const uint32_t* const argb, int cache_bits, VP8LBackwardRefs* const refs); + +static void ConvertPopulationCountTableToBitEstimates( + int num_symbols, const int population_counts[], double output[]) { + int sum = 0; + int nonzeros = 0; + int i; + for (i = 0; i < num_symbols; ++i) { + sum += population_counts[i]; + if (population_counts[i] > 0) { + ++nonzeros; + } + } + if (nonzeros <= 1) { + memset(output, 0, num_symbols * sizeof(*output)); + } else { + const double logsum = VP8LFastLog2(sum); + for (i = 0; i < num_symbols; ++i) { + output[i] = logsum - VP8LFastLog2(population_counts[i]); + } + } +} + +static int CostModelBuild(CostModel* const m, int xsize, int ysize, + int recursion_level, const uint32_t* const argb, + int cache_bits) { + int ok = 0; + VP8LHistogram histo; + VP8LBackwardRefs refs; + const int quality = 100; + + if (!VP8LBackwardRefsAlloc(&refs, xsize * ysize)) goto Error; + + if (recursion_level > 0) { + if (!BackwardReferencesTraceBackwards(xsize, ysize, recursion_level - 1, + argb, cache_bits, &refs)) { + goto Error; + } + } else { + if (!BackwardReferencesHashChain(xsize, ysize, argb, cache_bits, quality, + &refs)) { + goto Error; + } + } + VP8LHistogramCreate(&histo, &refs, cache_bits); + ConvertPopulationCountTableToBitEstimates( + VP8LHistogramNumCodes(&histo), histo.literal_, m->literal_); + ConvertPopulationCountTableToBitEstimates( + VALUES_IN_BYTE, histo.red_, m->red_); + ConvertPopulationCountTableToBitEstimates( + VALUES_IN_BYTE, histo.blue_, m->blue_); + ConvertPopulationCountTableToBitEstimates( + VALUES_IN_BYTE, histo.alpha_, m->alpha_); + ConvertPopulationCountTableToBitEstimates( + NUM_DISTANCE_CODES, histo.distance_, m->distance_); + ok = 1; + + Error: + VP8LClearBackwardRefs(&refs); + return ok; +} + +static WEBP_INLINE double GetLiteralCost(const CostModel* const m, uint32_t v) { + return m->alpha_[v >> 24] + + m->red_[(v >> 16) & 0xff] + + m->literal_[(v >> 8) & 0xff] + + m->blue_[v & 0xff]; +} + +static WEBP_INLINE double GetCacheCost(const CostModel* const m, uint32_t idx) { + const int literal_idx = VALUES_IN_BYTE + NUM_LENGTH_CODES + idx; + return m->literal_[literal_idx]; +} + +static WEBP_INLINE double GetLengthCost(const CostModel* const m, + uint32_t length) { + int code, extra_bits_count, extra_bits_value; + PrefixEncode(length, &code, &extra_bits_count, &extra_bits_value); + return m->literal_[VALUES_IN_BYTE + code] + extra_bits_count; +} + +static WEBP_INLINE double GetDistanceCost(const CostModel* const m, + uint32_t distance) { + int code, extra_bits_count, extra_bits_value; + PrefixEncode(distance, &code, &extra_bits_count, &extra_bits_value); + return m->distance_[code] + extra_bits_count; +} + +static int BackwardReferencesHashChainDistanceOnly( + int xsize, int ysize, int recursive_cost_model, const uint32_t* const argb, + int cache_bits, uint32_t* const dist_array) { + int i; + int ok = 0; + int cc_init = 0; + const int quality = 100; + const int pix_count = xsize * ysize; + const int use_color_cache = (cache_bits > 0); + double* const cost = + (double*)WebPSafeMalloc((uint64_t)pix_count, sizeof(*cost)); + CostModel* cost_model = (CostModel*)malloc(sizeof(*cost_model)); + HashChain* hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); + VP8LColorCache hashers; + const double mul0 = (recursive_cost_model != 0) ? 1.0 : 0.68; + const double mul1 = (recursive_cost_model != 0) ? 1.0 : 0.82; + + if (cost == NULL || cost_model == NULL || hash_chain == NULL) goto Error; + + if (!HashChainInit(hash_chain, pix_count)) goto Error; + + if (use_color_cache) { + cc_init = VP8LColorCacheInit(&hashers, cache_bits); + if (!cc_init) goto Error; + } + + if (!CostModelBuild(cost_model, xsize, ysize, recursive_cost_model, argb, + cache_bits)) { + goto Error; + } + + for (i = 0; i < pix_count; ++i) cost[i] = 1e100; + + // We loop one pixel at a time, but store all currently best points to + // non-processed locations from this point. + dist_array[0] = 0; + for (i = 0; i < pix_count; ++i) { + double prev_cost = 0.0; + int shortmax; + if (i > 0) { + prev_cost = cost[i - 1]; + } + for (shortmax = 0; shortmax < 2; ++shortmax) { + int offset = 0; + int len = 0; + if (i < pix_count - 1) { // FindCopy reads pixels at [i] and [i + 1]. + int maxlen = shortmax ? 2 : MAX_LENGTH; + if (maxlen > pix_count - i) { + maxlen = pix_count - i; + } + HashChainFindCopy(hash_chain, quality, i, xsize, argb, maxlen, + &offset, &len); + } + if (len >= MIN_LENGTH) { + const int code = DistanceToPlaneCode(xsize, offset); + const double distance_cost = + prev_cost + GetDistanceCost(cost_model, code); + int k; + for (k = 1; k < len; ++k) { + const double cost_val = + distance_cost + GetLengthCost(cost_model, k); + if (cost[i + k] > cost_val) { + cost[i + k] = cost_val; + dist_array[i + k] = k + 1; + } + } + // This if is for speedup only. It roughly doubles the speed, and + // makes compression worse by .1 %. + if (len >= 128 && code < 2) { + // Long copy for short distances, let's skip the middle + // lookups for better copies. + // 1) insert the hashes. + if (use_color_cache) { + for (k = 0; k < len; ++k) { + VP8LColorCacheInsert(&hashers, argb[i + k]); + } + } + // 2) Add to the hash_chain (but cannot add the last pixel) + { + const int last = (len < pix_count - 1 - i) ? len + : pix_count - 1 - i; + for (k = 0; k < last; ++k) { + HashChainInsert(hash_chain, &argb[i + k], i + k); + } + } + // 3) jump. + i += len - 1; // for loop does ++i, thus -1 here. + goto next_symbol; + } + } + } + if (i < pix_count - 1) { + HashChainInsert(hash_chain, &argb[i], i); + } + { + // inserting a literal pixel + double cost_val = prev_cost; + if (use_color_cache && VP8LColorCacheContains(&hashers, argb[i])) { + const int ix = VP8LColorCacheGetIndex(&hashers, argb[i]); + cost_val += GetCacheCost(cost_model, ix) * mul0; + } else { + cost_val += GetLiteralCost(cost_model, argb[i]) * mul1; + } + if (cost[i] > cost_val) { + cost[i] = cost_val; + dist_array[i] = 1; // only one is inserted. + } + if (use_color_cache) VP8LColorCacheInsert(&hashers, argb[i]); + } + next_symbol: ; + } + // Last pixel still to do, it can only be a single step if not reached + // through cheaper means already. + ok = 1; +Error: + if (cc_init) VP8LColorCacheClear(&hashers); + HashChainDelete(hash_chain); + free(cost_model); + free(cost); + return ok; +} + +static int TraceBackwards(const uint32_t* const dist_array, + int dist_array_size, + uint32_t** const chosen_path, + int* const chosen_path_size) { + int i; + // Count how many. + int count = 0; + for (i = dist_array_size - 1; i >= 0; ) { + int k = dist_array[i]; + assert(k >= 1); + ++count; + i -= k; + } + // Allocate. + *chosen_path_size = count; + *chosen_path = + (uint32_t*)WebPSafeMalloc((uint64_t)count, sizeof(**chosen_path)); + if (*chosen_path == NULL) return 0; + + // Write in reverse order. + for (i = dist_array_size - 1; i >= 0; ) { + int k = dist_array[i]; + assert(k >= 1); + (*chosen_path)[--count] = k; + i -= k; + } + return 1; +} + +static int BackwardReferencesHashChainFollowChosenPath( + int xsize, int ysize, const uint32_t* const argb, int cache_bits, + const uint32_t* const chosen_path, int chosen_path_size, + VP8LBackwardRefs* const refs) { + const int quality = 100; + const int pix_count = xsize * ysize; + const int use_color_cache = (cache_bits > 0); + int size = 0; + int i = 0; + int k; + int ix; + int ok = 0; + int cc_init = 0; + HashChain* hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); + VP8LColorCache hashers; + + if (hash_chain == NULL || !HashChainInit(hash_chain, pix_count)) { + goto Error; + } + if (use_color_cache) { + cc_init = VP8LColorCacheInit(&hashers, cache_bits); + if (!cc_init) goto Error; + } + + refs->size = 0; + for (ix = 0; ix < chosen_path_size; ++ix, ++size) { + int offset = 0; + int len = 0; + int maxlen = chosen_path[ix]; + if (maxlen != 1) { + HashChainFindCopy(hash_chain, quality, + i, xsize, argb, maxlen, &offset, &len); + assert(len == maxlen); + refs->refs[size] = PixOrCopyCreateCopy(offset, len); + if (use_color_cache) { + for (k = 0; k < len; ++k) { + VP8LColorCacheInsert(&hashers, argb[i + k]); + } + } + { + const int last = (len < pix_count - 1 - i) ? len : pix_count - 1 - i; + for (k = 0; k < last; ++k) { + HashChainInsert(hash_chain, &argb[i + k], i + k); + } + } + i += len; + } else { + if (use_color_cache && VP8LColorCacheContains(&hashers, argb[i])) { + // push pixel as a color cache index + const int idx = VP8LColorCacheGetIndex(&hashers, argb[i]); + refs->refs[size] = PixOrCopyCreateCacheIdx(idx); + } else { + refs->refs[size] = PixOrCopyCreateLiteral(argb[i]); + } + if (use_color_cache) VP8LColorCacheInsert(&hashers, argb[i]); + if (i + 1 < pix_count) { + HashChainInsert(hash_chain, &argb[i], i); + } + ++i; + } + } + assert(size <= refs->max_size); + refs->size = size; + ok = 1; +Error: + if (cc_init) VP8LColorCacheClear(&hashers); + HashChainDelete(hash_chain); + return ok; +} + +// Returns 1 on success. +static int BackwardReferencesTraceBackwards(int xsize, int ysize, + int recursive_cost_model, + const uint32_t* const argb, + int cache_bits, + VP8LBackwardRefs* const refs) { + int ok = 0; + const int dist_array_size = xsize * ysize; + uint32_t* chosen_path = NULL; + int chosen_path_size = 0; + uint32_t* dist_array = + (uint32_t*)WebPSafeMalloc((uint64_t)dist_array_size, sizeof(*dist_array)); + + if (dist_array == NULL) goto Error; + + if (!BackwardReferencesHashChainDistanceOnly( + xsize, ysize, recursive_cost_model, argb, cache_bits, dist_array)) { + goto Error; + } + if (!TraceBackwards(dist_array, dist_array_size, + &chosen_path, &chosen_path_size)) { + goto Error; + } + free(dist_array); // no need to retain this memory any longer + dist_array = NULL; + if (!BackwardReferencesHashChainFollowChosenPath( + xsize, ysize, argb, cache_bits, chosen_path, chosen_path_size, refs)) { + goto Error; + } + ok = 1; + Error: + free(chosen_path); + free(dist_array); + return ok; +} + +static void BackwardReferences2DLocality(int xsize, + VP8LBackwardRefs* const refs) { + int i; + for (i = 0; i < refs->size; ++i) { + if (PixOrCopyIsCopy(&refs->refs[i])) { + const int dist = refs->refs[i].argb_or_distance; + const int transformed_dist = DistanceToPlaneCode(xsize, dist); + refs->refs[i].argb_or_distance = transformed_dist; + } + } +} + +int VP8LGetBackwardReferences(int width, int height, + const uint32_t* const argb, + int quality, int cache_bits, int use_2d_locality, + VP8LBackwardRefs* const best) { + int ok = 0; + int lz77_is_useful; + VP8LBackwardRefs refs_rle, refs_lz77; + const int num_pix = width * height; + + VP8LBackwardRefsAlloc(&refs_rle, num_pix); + VP8LBackwardRefsAlloc(&refs_lz77, num_pix); + VP8LInitBackwardRefs(best); + if (refs_rle.refs == NULL || refs_lz77.refs == NULL) { + Error1: + VP8LClearBackwardRefs(&refs_rle); + VP8LClearBackwardRefs(&refs_lz77); + goto End; + } + + if (!BackwardReferencesHashChain(width, height, argb, cache_bits, quality, + &refs_lz77)) { + goto End; + } + // Backward Reference using RLE only. + BackwardReferencesRle(width, height, argb, &refs_rle); + + { + double bit_cost_lz77, bit_cost_rle; + VP8LHistogram* const histo = (VP8LHistogram*)malloc(sizeof(*histo)); + if (histo == NULL) goto Error1; + // Evaluate lz77 coding + VP8LHistogramCreate(histo, &refs_lz77, cache_bits); + bit_cost_lz77 = VP8LHistogramEstimateBits(histo); + // Evaluate RLE coding + VP8LHistogramCreate(histo, &refs_rle, cache_bits); + bit_cost_rle = VP8LHistogramEstimateBits(histo); + // Decide if LZ77 is useful. + lz77_is_useful = (bit_cost_lz77 < bit_cost_rle); + free(histo); + } + + // Choose appropriate backward reference. + if (lz77_is_useful) { + // TraceBackwards is costly. Run it for higher qualities. + const int try_lz77_trace_backwards = (quality >= 75); + *best = refs_lz77; // default guess: lz77 is better + VP8LClearBackwardRefs(&refs_rle); + if (try_lz77_trace_backwards) { + const int recursion_level = (num_pix < 320 * 200) ? 1 : 0; + VP8LBackwardRefs refs_trace; + if (!VP8LBackwardRefsAlloc(&refs_trace, num_pix)) { + goto End; + } + if (BackwardReferencesTraceBackwards( + width, height, recursion_level, argb, cache_bits, &refs_trace)) { + VP8LClearBackwardRefs(&refs_lz77); + *best = refs_trace; + } + } + } else { + VP8LClearBackwardRefs(&refs_lz77); + *best = refs_rle; + } + + if (use_2d_locality) BackwardReferences2DLocality(width, best); + + ok = 1; + + End: + if (!ok) { + VP8LClearBackwardRefs(best); + } + return ok; +} + +// Returns 1 on success. +static int ComputeCacheHistogram(const uint32_t* const argb, + int xsize, int ysize, + const VP8LBackwardRefs* const refs, + int cache_bits, + VP8LHistogram* const histo) { + int pixel_index = 0; + int i; + uint32_t k; + VP8LColorCache hashers; + const int use_color_cache = (cache_bits > 0); + int cc_init = 0; + + if (use_color_cache) { + cc_init = VP8LColorCacheInit(&hashers, cache_bits); + if (!cc_init) return 0; + } + + for (i = 0; i < refs->size; ++i) { + const PixOrCopy* const v = &refs->refs[i]; + if (PixOrCopyIsLiteral(v)) { + if (use_color_cache && + VP8LColorCacheContains(&hashers, argb[pixel_index])) { + // push pixel as a cache index + const int ix = VP8LColorCacheGetIndex(&hashers, argb[pixel_index]); + const PixOrCopy token = PixOrCopyCreateCacheIdx(ix); + VP8LHistogramAddSinglePixOrCopy(histo, &token); + } else { + VP8LHistogramAddSinglePixOrCopy(histo, v); + } + } else { + VP8LHistogramAddSinglePixOrCopy(histo, v); + } + if (use_color_cache) { + for (k = 0; k < PixOrCopyLength(v); ++k) { + VP8LColorCacheInsert(&hashers, argb[pixel_index + k]); + } + } + pixel_index += PixOrCopyLength(v); + } + assert(pixel_index == xsize * ysize); + (void)xsize; // xsize is not used in non-debug compilations otherwise. + (void)ysize; // ysize is not used in non-debug compilations otherwise. + if (cc_init) VP8LColorCacheClear(&hashers); + return 1; +} + +// Returns how many bits are to be used for a color cache. +int VP8LCalculateEstimateForCacheSize(const uint32_t* const argb, + int xsize, int ysize, + int* const best_cache_bits) { + int ok = 0; + int cache_bits; + double lowest_entropy = 1e99; + VP8LBackwardRefs refs; + static const double kSmallPenaltyForLargeCache = 4.0; + static const int quality = 30; + if (!VP8LBackwardRefsAlloc(&refs, xsize * ysize) || + !BackwardReferencesHashChain(xsize, ysize, argb, 0, quality, &refs)) { + goto Error; + } + for (cache_bits = 0; cache_bits <= MAX_COLOR_CACHE_BITS; ++cache_bits) { + double cur_entropy; + VP8LHistogram histo; + VP8LHistogramInit(&histo, cache_bits); + ComputeCacheHistogram(argb, xsize, ysize, &refs, cache_bits, &histo); + cur_entropy = VP8LHistogramEstimateBits(&histo) + + kSmallPenaltyForLargeCache * cache_bits; + if (cache_bits == 0 || cur_entropy < lowest_entropy) { + *best_cache_bits = cache_bits; + lowest_entropy = cur_entropy; + } + } + ok = 1; + Error: + VP8LClearBackwardRefs(&refs); + return ok; +} diff --git a/drivers/webpold/enc/backward_references.h b/drivers/webpold/enc/backward_references.h new file mode 100644 index 0000000000..8006a56ba1 --- /dev/null +++ b/drivers/webpold/enc/backward_references.h @@ -0,0 +1,212 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Author: Jyrki Alakuijala (jyrki@google.com) +// + +#ifndef WEBP_ENC_BACKWARD_REFERENCES_H_ +#define WEBP_ENC_BACKWARD_REFERENCES_H_ + +#include <assert.h> +#include <stdlib.h> +#include "../types.h" +#include "../format_constants.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// The spec allows 11, we use 9 bits to reduce memory consumption in encoding. +// Having 9 instead of 11 only removes about 0.25 % of compression density. +#define MAX_COLOR_CACHE_BITS 9 + +// Max ever number of codes we'll use: +#define PIX_OR_COPY_CODES_MAX \ + (NUM_LITERAL_CODES + NUM_LENGTH_CODES + (1 << MAX_COLOR_CACHE_BITS)) + +// ----------------------------------------------------------------------------- +// PrefixEncode() + +// use GNU builtins where available. +#if defined(__GNUC__) && \ + ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4) +static WEBP_INLINE int BitsLog2Floor(uint32_t n) { + return n == 0 ? -1 : 31 ^ __builtin_clz(n); +} +#elif defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86)) +#include <intrin.h> +#pragma intrinsic(_BitScanReverse) + +static WEBP_INLINE int BitsLog2Floor(uint32_t n) { + unsigned long first_set_bit; + return _BitScanReverse(&first_set_bit, n) ? first_set_bit : -1; +} +#else +static WEBP_INLINE int BitsLog2Floor(uint32_t n) { + int log = 0; + uint32_t value = n; + int i; + + if (value == 0) return -1; + for (i = 4; i >= 0; --i) { + const int shift = (1 << i); + const uint32_t x = value >> shift; + if (x != 0) { + value = x; + log += shift; + } + } + return log; +} +#endif + +static WEBP_INLINE int VP8LBitsLog2Ceiling(uint32_t n) { + const int floor = BitsLog2Floor(n); + if (n == (n & ~(n - 1))) // zero or a power of two. + return floor; + else + return floor + 1; +} + +// Splitting of distance and length codes into prefixes and +// extra bits. The prefixes are encoded with an entropy code +// while the extra bits are stored just as normal bits. +static WEBP_INLINE void PrefixEncode(int distance, int* const code, + int* const extra_bits_count, + int* const extra_bits_value) { + // Collect the two most significant bits where the highest bit is 1. + const int highest_bit = BitsLog2Floor(--distance); + // & 0x3f is to make behavior well defined when highest_bit + // does not exist or is the least significant bit. + const int second_highest_bit = + (distance >> ((highest_bit - 1) & 0x3f)) & 1; + *extra_bits_count = (highest_bit > 0) ? (highest_bit - 1) : 0; + *extra_bits_value = distance & ((1 << *extra_bits_count) - 1); + *code = (highest_bit > 0) ? (2 * highest_bit + second_highest_bit) + : (highest_bit == 0) ? 1 : 0; +} + +// ----------------------------------------------------------------------------- +// PixOrCopy + +enum Mode { + kLiteral, + kCacheIdx, + kCopy, + kNone +}; + +typedef struct { + // mode as uint8_t to make the memory layout to be exactly 8 bytes. + uint8_t mode; + uint16_t len; + uint32_t argb_or_distance; +} PixOrCopy; + +static WEBP_INLINE PixOrCopy PixOrCopyCreateCopy(uint32_t distance, + uint16_t len) { + PixOrCopy retval; + retval.mode = kCopy; + retval.argb_or_distance = distance; + retval.len = len; + return retval; +} + +static WEBP_INLINE PixOrCopy PixOrCopyCreateCacheIdx(int idx) { + PixOrCopy retval; + assert(idx >= 0); + assert(idx < (1 << MAX_COLOR_CACHE_BITS)); + retval.mode = kCacheIdx; + retval.argb_or_distance = idx; + retval.len = 1; + return retval; +} + +static WEBP_INLINE PixOrCopy PixOrCopyCreateLiteral(uint32_t argb) { + PixOrCopy retval; + retval.mode = kLiteral; + retval.argb_or_distance = argb; + retval.len = 1; + return retval; +} + +static WEBP_INLINE int PixOrCopyIsLiteral(const PixOrCopy* const p) { + return (p->mode == kLiteral); +} + +static WEBP_INLINE int PixOrCopyIsCacheIdx(const PixOrCopy* const p) { + return (p->mode == kCacheIdx); +} + +static WEBP_INLINE int PixOrCopyIsCopy(const PixOrCopy* const p) { + return (p->mode == kCopy); +} + +static WEBP_INLINE uint32_t PixOrCopyLiteral(const PixOrCopy* const p, + int component) { + assert(p->mode == kLiteral); + return (p->argb_or_distance >> (component * 8)) & 0xff; +} + +static WEBP_INLINE uint32_t PixOrCopyLength(const PixOrCopy* const p) { + return p->len; +} + +static WEBP_INLINE uint32_t PixOrCopyArgb(const PixOrCopy* const p) { + assert(p->mode == kLiteral); + return p->argb_or_distance; +} + +static WEBP_INLINE uint32_t PixOrCopyCacheIdx(const PixOrCopy* const p) { + assert(p->mode == kCacheIdx); + assert(p->argb_or_distance < (1U << MAX_COLOR_CACHE_BITS)); + return p->argb_or_distance; +} + +static WEBP_INLINE uint32_t PixOrCopyDistance(const PixOrCopy* const p) { + assert(p->mode == kCopy); + return p->argb_or_distance; +} + +// ----------------------------------------------------------------------------- +// VP8LBackwardRefs + +typedef struct { + PixOrCopy* refs; + int size; // currently used + int max_size; // maximum capacity +} VP8LBackwardRefs; + +// Initialize the object. Must be called first. 'refs' can be NULL. +void VP8LInitBackwardRefs(VP8LBackwardRefs* const refs); + +// Release memory and re-initialize the object. 'refs' can be NULL. +void VP8LClearBackwardRefs(VP8LBackwardRefs* const refs); + +// Allocate 'max_size' references. Returns false in case of memory error. +int VP8LBackwardRefsAlloc(VP8LBackwardRefs* const refs, int max_size); + +// ----------------------------------------------------------------------------- +// Main entry points + +// Evaluates best possible backward references for specified quality. +// Further optimize for 2D locality if use_2d_locality flag is set. +int VP8LGetBackwardReferences(int width, int height, + const uint32_t* const argb, + int quality, int cache_bits, int use_2d_locality, + VP8LBackwardRefs* const best); + +// Produce an estimate for a good color cache size for the image. +int VP8LCalculateEstimateForCacheSize(const uint32_t* const argb, + int xsize, int ysize, + int* const best_cache_bits); + +#if defined(__cplusplus) || defined(c_plusplus) +} +#endif + +#endif // WEBP_ENC_BACKWARD_REFERENCES_H_ diff --git a/drivers/webpold/enc/config.c b/drivers/webpold/enc/config.c new file mode 100644 index 0000000000..4136f6c227 --- /dev/null +++ b/drivers/webpold/enc/config.c @@ -0,0 +1,132 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Coding tools configuration +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "../encode.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// WebPConfig +//------------------------------------------------------------------------------ + +int WebPConfigInitInternal(WebPConfig* config, + WebPPreset preset, float quality, int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) { + return 0; // caller/system version mismatch! + } + if (config == NULL) return 0; + + config->quality = quality; + config->target_size = 0; + config->target_PSNR = 0.; + config->method = 4; + config->sns_strength = 50; + config->filter_strength = 20; // default: light filtering + config->filter_sharpness = 0; + config->filter_type = 0; // default: simple + config->partitions = 0; + config->segments = 4; + config->pass = 1; + config->show_compressed = 0; + config->preprocessing = 0; + config->autofilter = 0; + config->partition_limit = 0; + config->alpha_compression = 1; + config->alpha_filtering = 1; + config->alpha_quality = 100; + config->lossless = 0; + config->image_hint = WEBP_HINT_DEFAULT; + + // TODO(skal): tune. + switch (preset) { + case WEBP_PRESET_PICTURE: + config->sns_strength = 80; + config->filter_sharpness = 4; + config->filter_strength = 35; + break; + case WEBP_PRESET_PHOTO: + config->sns_strength = 80; + config->filter_sharpness = 3; + config->filter_strength = 30; + break; + case WEBP_PRESET_DRAWING: + config->sns_strength = 25; + config->filter_sharpness = 6; + config->filter_strength = 10; + break; + case WEBP_PRESET_ICON: + config->sns_strength = 0; + config->filter_strength = 0; // disable filtering to retain sharpness + break; + case WEBP_PRESET_TEXT: + config->sns_strength = 0; + config->filter_strength = 0; // disable filtering to retain sharpness + config->segments = 2; + break; + case WEBP_PRESET_DEFAULT: + default: + break; + } + return WebPValidateConfig(config); +} + +int WebPValidateConfig(const WebPConfig* config) { + if (config == NULL) return 0; + if (config->quality < 0 || config->quality > 100) + return 0; + if (config->target_size < 0) + return 0; + if (config->target_PSNR < 0) + return 0; + if (config->method < 0 || config->method > 6) + return 0; + if (config->segments < 1 || config->segments > 4) + return 0; + if (config->sns_strength < 0 || config->sns_strength > 100) + return 0; + if (config->filter_strength < 0 || config->filter_strength > 100) + return 0; + if (config->filter_sharpness < 0 || config->filter_sharpness > 7) + return 0; + if (config->filter_type < 0 || config->filter_type > 1) + return 0; + if (config->autofilter < 0 || config->autofilter > 1) + return 0; + if (config->pass < 1 || config->pass > 10) + return 0; + if (config->show_compressed < 0 || config->show_compressed > 1) + return 0; + if (config->preprocessing < 0 || config->preprocessing > 1) + return 0; + if (config->partitions < 0 || config->partitions > 3) + return 0; + if (config->partition_limit < 0 || config->partition_limit > 100) + return 0; + if (config->alpha_compression < 0) + return 0; + if (config->alpha_filtering < 0) + return 0; + if (config->alpha_quality < 0 || config->alpha_quality > 100) + return 0; + if (config->lossless < 0 || config->lossless > 1) + return 0; + if (config->image_hint >= WEBP_HINT_LAST) + return 0; + return 1; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/cost.c b/drivers/webpold/enc/cost.c new file mode 100644 index 0000000000..92e0cc713c --- /dev/null +++ b/drivers/webpold/enc/cost.c @@ -0,0 +1,494 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Cost tables for level and modes +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./cost.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Boolean-cost cost table + +const uint16_t VP8EntropyCost[256] = { + 1792, 1792, 1792, 1536, 1536, 1408, 1366, 1280, 1280, 1216, + 1178, 1152, 1110, 1076, 1061, 1024, 1024, 992, 968, 951, + 939, 911, 896, 878, 871, 854, 838, 820, 811, 794, + 786, 768, 768, 752, 740, 732, 720, 709, 704, 690, + 683, 672, 666, 655, 647, 640, 631, 622, 615, 607, + 598, 592, 586, 576, 572, 564, 559, 555, 547, 541, + 534, 528, 522, 512, 512, 504, 500, 494, 488, 483, + 477, 473, 467, 461, 458, 452, 448, 443, 438, 434, + 427, 424, 419, 415, 410, 406, 403, 399, 394, 390, + 384, 384, 377, 374, 370, 366, 362, 359, 355, 351, + 347, 342, 342, 336, 333, 330, 326, 323, 320, 316, + 312, 308, 305, 302, 299, 296, 293, 288, 287, 283, + 280, 277, 274, 272, 268, 266, 262, 256, 256, 256, + 251, 248, 245, 242, 240, 237, 234, 232, 228, 226, + 223, 221, 218, 216, 214, 211, 208, 205, 203, 201, + 198, 196, 192, 191, 188, 187, 183, 181, 179, 176, + 175, 171, 171, 168, 165, 163, 160, 159, 156, 154, + 152, 150, 148, 146, 144, 142, 139, 138, 135, 133, + 131, 128, 128, 125, 123, 121, 119, 117, 115, 113, + 111, 110, 107, 105, 103, 102, 100, 98, 96, 94, + 92, 91, 89, 86, 86, 83, 82, 80, 77, 76, + 74, 73, 71, 69, 67, 66, 64, 63, 61, 59, + 57, 55, 54, 52, 51, 49, 47, 46, 44, 43, + 41, 40, 38, 36, 35, 33, 32, 30, 29, 27, + 25, 24, 22, 21, 19, 18, 16, 15, 13, 12, + 10, 9, 7, 6, 4, 3 +}; + +//------------------------------------------------------------------------------ +// Level cost tables + +// For each given level, the following table gives the pattern of contexts to +// use for coding it (in [][0]) as well as the bit value to use for each +// context (in [][1]). +const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2] = { + {0x001, 0x000}, {0x007, 0x001}, {0x00f, 0x005}, + {0x00f, 0x00d}, {0x033, 0x003}, {0x033, 0x003}, {0x033, 0x023}, + {0x033, 0x023}, {0x033, 0x023}, {0x033, 0x023}, {0x0d3, 0x013}, + {0x0d3, 0x013}, {0x0d3, 0x013}, {0x0d3, 0x013}, {0x0d3, 0x013}, + {0x0d3, 0x013}, {0x0d3, 0x013}, {0x0d3, 0x013}, {0x0d3, 0x093}, + {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, + {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, + {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, + {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, {0x153, 0x053}, + {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, + {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, + {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, + {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, + {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, + {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, + {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, + {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x153} +}; + +// fixed costs for coding levels, deduce from the coding tree. +// This is only the part that doesn't depend on the probability state. +const uint16_t VP8LevelFixedCosts[2048] = { + 0, 256, 256, 256, 256, 432, 618, 630, + 731, 640, 640, 828, 901, 948, 1021, 1101, + 1174, 1221, 1294, 1042, 1085, 1115, 1158, 1202, + 1245, 1275, 1318, 1337, 1380, 1410, 1453, 1497, + 1540, 1570, 1613, 1280, 1295, 1317, 1332, 1358, + 1373, 1395, 1410, 1454, 1469, 1491, 1506, 1532, + 1547, 1569, 1584, 1601, 1616, 1638, 1653, 1679, + 1694, 1716, 1731, 1775, 1790, 1812, 1827, 1853, + 1868, 1890, 1905, 1727, 1733, 1742, 1748, 1759, + 1765, 1774, 1780, 1800, 1806, 1815, 1821, 1832, + 1838, 1847, 1853, 1878, 1884, 1893, 1899, 1910, + 1916, 1925, 1931, 1951, 1957, 1966, 1972, 1983, + 1989, 1998, 2004, 2027, 2033, 2042, 2048, 2059, + 2065, 2074, 2080, 2100, 2106, 2115, 2121, 2132, + 2138, 2147, 2153, 2178, 2184, 2193, 2199, 2210, + 2216, 2225, 2231, 2251, 2257, 2266, 2272, 2283, + 2289, 2298, 2304, 2168, 2174, 2183, 2189, 2200, + 2206, 2215, 2221, 2241, 2247, 2256, 2262, 2273, + 2279, 2288, 2294, 2319, 2325, 2334, 2340, 2351, + 2357, 2366, 2372, 2392, 2398, 2407, 2413, 2424, + 2430, 2439, 2445, 2468, 2474, 2483, 2489, 2500, + 2506, 2515, 2521, 2541, 2547, 2556, 2562, 2573, + 2579, 2588, 2594, 2619, 2625, 2634, 2640, 2651, + 2657, 2666, 2672, 2692, 2698, 2707, 2713, 2724, + 2730, 2739, 2745, 2540, 2546, 2555, 2561, 2572, + 2578, 2587, 2593, 2613, 2619, 2628, 2634, 2645, + 2651, 2660, 2666, 2691, 2697, 2706, 2712, 2723, + 2729, 2738, 2744, 2764, 2770, 2779, 2785, 2796, + 2802, 2811, 2817, 2840, 2846, 2855, 2861, 2872, + 2878, 2887, 2893, 2913, 2919, 2928, 2934, 2945, + 2951, 2960, 2966, 2991, 2997, 3006, 3012, 3023, + 3029, 3038, 3044, 3064, 3070, 3079, 3085, 3096, + 3102, 3111, 3117, 2981, 2987, 2996, 3002, 3013, + 3019, 3028, 3034, 3054, 3060, 3069, 3075, 3086, + 3092, 3101, 3107, 3132, 3138, 3147, 3153, 3164, + 3170, 3179, 3185, 3205, 3211, 3220, 3226, 3237, + 3243, 3252, 3258, 3281, 3287, 3296, 3302, 3313, + 3319, 3328, 3334, 3354, 3360, 3369, 3375, 3386, + 3392, 3401, 3407, 3432, 3438, 3447, 3453, 3464, + 3470, 3479, 3485, 3505, 3511, 3520, 3526, 3537, + 3543, 3552, 3558, 2816, 2822, 2831, 2837, 2848, + 2854, 2863, 2869, 2889, 2895, 2904, 2910, 2921, + 2927, 2936, 2942, 2967, 2973, 2982, 2988, 2999, + 3005, 3014, 3020, 3040, 3046, 3055, 3061, 3072, + 3078, 3087, 3093, 3116, 3122, 3131, 3137, 3148, + 3154, 3163, 3169, 3189, 3195, 3204, 3210, 3221, + 3227, 3236, 3242, 3267, 3273, 3282, 3288, 3299, + 3305, 3314, 3320, 3340, 3346, 3355, 3361, 3372, + 3378, 3387, 3393, 3257, 3263, 3272, 3278, 3289, + 3295, 3304, 3310, 3330, 3336, 3345, 3351, 3362, + 3368, 3377, 3383, 3408, 3414, 3423, 3429, 3440, + 3446, 3455, 3461, 3481, 3487, 3496, 3502, 3513, + 3519, 3528, 3534, 3557, 3563, 3572, 3578, 3589, + 3595, 3604, 3610, 3630, 3636, 3645, 3651, 3662, + 3668, 3677, 3683, 3708, 3714, 3723, 3729, 3740, + 3746, 3755, 3761, 3781, 3787, 3796, 3802, 3813, + 3819, 3828, 3834, 3629, 3635, 3644, 3650, 3661, + 3667, 3676, 3682, 3702, 3708, 3717, 3723, 3734, + 3740, 3749, 3755, 3780, 3786, 3795, 3801, 3812, + 3818, 3827, 3833, 3853, 3859, 3868, 3874, 3885, + 3891, 3900, 3906, 3929, 3935, 3944, 3950, 3961, + 3967, 3976, 3982, 4002, 4008, 4017, 4023, 4034, + 4040, 4049, 4055, 4080, 4086, 4095, 4101, 4112, + 4118, 4127, 4133, 4153, 4159, 4168, 4174, 4185, + 4191, 4200, 4206, 4070, 4076, 4085, 4091, 4102, + 4108, 4117, 4123, 4143, 4149, 4158, 4164, 4175, + 4181, 4190, 4196, 4221, 4227, 4236, 4242, 4253, + 4259, 4268, 4274, 4294, 4300, 4309, 4315, 4326, + 4332, 4341, 4347, 4370, 4376, 4385, 4391, 4402, + 4408, 4417, 4423, 4443, 4449, 4458, 4464, 4475, + 4481, 4490, 4496, 4521, 4527, 4536, 4542, 4553, + 4559, 4568, 4574, 4594, 4600, 4609, 4615, 4626, + 4632, 4641, 4647, 3515, 3521, 3530, 3536, 3547, + 3553, 3562, 3568, 3588, 3594, 3603, 3609, 3620, + 3626, 3635, 3641, 3666, 3672, 3681, 3687, 3698, + 3704, 3713, 3719, 3739, 3745, 3754, 3760, 3771, + 3777, 3786, 3792, 3815, 3821, 3830, 3836, 3847, + 3853, 3862, 3868, 3888, 3894, 3903, 3909, 3920, + 3926, 3935, 3941, 3966, 3972, 3981, 3987, 3998, + 4004, 4013, 4019, 4039, 4045, 4054, 4060, 4071, + 4077, 4086, 4092, 3956, 3962, 3971, 3977, 3988, + 3994, 4003, 4009, 4029, 4035, 4044, 4050, 4061, + 4067, 4076, 4082, 4107, 4113, 4122, 4128, 4139, + 4145, 4154, 4160, 4180, 4186, 4195, 4201, 4212, + 4218, 4227, 4233, 4256, 4262, 4271, 4277, 4288, + 4294, 4303, 4309, 4329, 4335, 4344, 4350, 4361, + 4367, 4376, 4382, 4407, 4413, 4422, 4428, 4439, + 4445, 4454, 4460, 4480, 4486, 4495, 4501, 4512, + 4518, 4527, 4533, 4328, 4334, 4343, 4349, 4360, + 4366, 4375, 4381, 4401, 4407, 4416, 4422, 4433, + 4439, 4448, 4454, 4479, 4485, 4494, 4500, 4511, + 4517, 4526, 4532, 4552, 4558, 4567, 4573, 4584, + 4590, 4599, 4605, 4628, 4634, 4643, 4649, 4660, + 4666, 4675, 4681, 4701, 4707, 4716, 4722, 4733, + 4739, 4748, 4754, 4779, 4785, 4794, 4800, 4811, + 4817, 4826, 4832, 4852, 4858, 4867, 4873, 4884, + 4890, 4899, 4905, 4769, 4775, 4784, 4790, 4801, + 4807, 4816, 4822, 4842, 4848, 4857, 4863, 4874, + 4880, 4889, 4895, 4920, 4926, 4935, 4941, 4952, + 4958, 4967, 4973, 4993, 4999, 5008, 5014, 5025, + 5031, 5040, 5046, 5069, 5075, 5084, 5090, 5101, + 5107, 5116, 5122, 5142, 5148, 5157, 5163, 5174, + 5180, 5189, 5195, 5220, 5226, 5235, 5241, 5252, + 5258, 5267, 5273, 5293, 5299, 5308, 5314, 5325, + 5331, 5340, 5346, 4604, 4610, 4619, 4625, 4636, + 4642, 4651, 4657, 4677, 4683, 4692, 4698, 4709, + 4715, 4724, 4730, 4755, 4761, 4770, 4776, 4787, + 4793, 4802, 4808, 4828, 4834, 4843, 4849, 4860, + 4866, 4875, 4881, 4904, 4910, 4919, 4925, 4936, + 4942, 4951, 4957, 4977, 4983, 4992, 4998, 5009, + 5015, 5024, 5030, 5055, 5061, 5070, 5076, 5087, + 5093, 5102, 5108, 5128, 5134, 5143, 5149, 5160, + 5166, 5175, 5181, 5045, 5051, 5060, 5066, 5077, + 5083, 5092, 5098, 5118, 5124, 5133, 5139, 5150, + 5156, 5165, 5171, 5196, 5202, 5211, 5217, 5228, + 5234, 5243, 5249, 5269, 5275, 5284, 5290, 5301, + 5307, 5316, 5322, 5345, 5351, 5360, 5366, 5377, + 5383, 5392, 5398, 5418, 5424, 5433, 5439, 5450, + 5456, 5465, 5471, 5496, 5502, 5511, 5517, 5528, + 5534, 5543, 5549, 5569, 5575, 5584, 5590, 5601, + 5607, 5616, 5622, 5417, 5423, 5432, 5438, 5449, + 5455, 5464, 5470, 5490, 5496, 5505, 5511, 5522, + 5528, 5537, 5543, 5568, 5574, 5583, 5589, 5600, + 5606, 5615, 5621, 5641, 5647, 5656, 5662, 5673, + 5679, 5688, 5694, 5717, 5723, 5732, 5738, 5749, + 5755, 5764, 5770, 5790, 5796, 5805, 5811, 5822, + 5828, 5837, 5843, 5868, 5874, 5883, 5889, 5900, + 5906, 5915, 5921, 5941, 5947, 5956, 5962, 5973, + 5979, 5988, 5994, 5858, 5864, 5873, 5879, 5890, + 5896, 5905, 5911, 5931, 5937, 5946, 5952, 5963, + 5969, 5978, 5984, 6009, 6015, 6024, 6030, 6041, + 6047, 6056, 6062, 6082, 6088, 6097, 6103, 6114, + 6120, 6129, 6135, 6158, 6164, 6173, 6179, 6190, + 6196, 6205, 6211, 6231, 6237, 6246, 6252, 6263, + 6269, 6278, 6284, 6309, 6315, 6324, 6330, 6341, + 6347, 6356, 6362, 6382, 6388, 6397, 6403, 6414, + 6420, 6429, 6435, 3515, 3521, 3530, 3536, 3547, + 3553, 3562, 3568, 3588, 3594, 3603, 3609, 3620, + 3626, 3635, 3641, 3666, 3672, 3681, 3687, 3698, + 3704, 3713, 3719, 3739, 3745, 3754, 3760, 3771, + 3777, 3786, 3792, 3815, 3821, 3830, 3836, 3847, + 3853, 3862, 3868, 3888, 3894, 3903, 3909, 3920, + 3926, 3935, 3941, 3966, 3972, 3981, 3987, 3998, + 4004, 4013, 4019, 4039, 4045, 4054, 4060, 4071, + 4077, 4086, 4092, 3956, 3962, 3971, 3977, 3988, + 3994, 4003, 4009, 4029, 4035, 4044, 4050, 4061, + 4067, 4076, 4082, 4107, 4113, 4122, 4128, 4139, + 4145, 4154, 4160, 4180, 4186, 4195, 4201, 4212, + 4218, 4227, 4233, 4256, 4262, 4271, 4277, 4288, + 4294, 4303, 4309, 4329, 4335, 4344, 4350, 4361, + 4367, 4376, 4382, 4407, 4413, 4422, 4428, 4439, + 4445, 4454, 4460, 4480, 4486, 4495, 4501, 4512, + 4518, 4527, 4533, 4328, 4334, 4343, 4349, 4360, + 4366, 4375, 4381, 4401, 4407, 4416, 4422, 4433, + 4439, 4448, 4454, 4479, 4485, 4494, 4500, 4511, + 4517, 4526, 4532, 4552, 4558, 4567, 4573, 4584, + 4590, 4599, 4605, 4628, 4634, 4643, 4649, 4660, + 4666, 4675, 4681, 4701, 4707, 4716, 4722, 4733, + 4739, 4748, 4754, 4779, 4785, 4794, 4800, 4811, + 4817, 4826, 4832, 4852, 4858, 4867, 4873, 4884, + 4890, 4899, 4905, 4769, 4775, 4784, 4790, 4801, + 4807, 4816, 4822, 4842, 4848, 4857, 4863, 4874, + 4880, 4889, 4895, 4920, 4926, 4935, 4941, 4952, + 4958, 4967, 4973, 4993, 4999, 5008, 5014, 5025, + 5031, 5040, 5046, 5069, 5075, 5084, 5090, 5101, + 5107, 5116, 5122, 5142, 5148, 5157, 5163, 5174, + 5180, 5189, 5195, 5220, 5226, 5235, 5241, 5252, + 5258, 5267, 5273, 5293, 5299, 5308, 5314, 5325, + 5331, 5340, 5346, 4604, 4610, 4619, 4625, 4636, + 4642, 4651, 4657, 4677, 4683, 4692, 4698, 4709, + 4715, 4724, 4730, 4755, 4761, 4770, 4776, 4787, + 4793, 4802, 4808, 4828, 4834, 4843, 4849, 4860, + 4866, 4875, 4881, 4904, 4910, 4919, 4925, 4936, + 4942, 4951, 4957, 4977, 4983, 4992, 4998, 5009, + 5015, 5024, 5030, 5055, 5061, 5070, 5076, 5087, + 5093, 5102, 5108, 5128, 5134, 5143, 5149, 5160, + 5166, 5175, 5181, 5045, 5051, 5060, 5066, 5077, + 5083, 5092, 5098, 5118, 5124, 5133, 5139, 5150, + 5156, 5165, 5171, 5196, 5202, 5211, 5217, 5228, + 5234, 5243, 5249, 5269, 5275, 5284, 5290, 5301, + 5307, 5316, 5322, 5345, 5351, 5360, 5366, 5377, + 5383, 5392, 5398, 5418, 5424, 5433, 5439, 5450, + 5456, 5465, 5471, 5496, 5502, 5511, 5517, 5528, + 5534, 5543, 5549, 5569, 5575, 5584, 5590, 5601, + 5607, 5616, 5622, 5417, 5423, 5432, 5438, 5449, + 5455, 5464, 5470, 5490, 5496, 5505, 5511, 5522, + 5528, 5537, 5543, 5568, 5574, 5583, 5589, 5600, + 5606, 5615, 5621, 5641, 5647, 5656, 5662, 5673, + 5679, 5688, 5694, 5717, 5723, 5732, 5738, 5749, + 5755, 5764, 5770, 5790, 5796, 5805, 5811, 5822, + 5828, 5837, 5843, 5868, 5874, 5883, 5889, 5900, + 5906, 5915, 5921, 5941, 5947, 5956, 5962, 5973, + 5979, 5988, 5994, 5858, 5864, 5873, 5879, 5890, + 5896, 5905, 5911, 5931, 5937, 5946, 5952, 5963, + 5969, 5978, 5984, 6009, 6015, 6024, 6030, 6041, + 6047, 6056, 6062, 6082, 6088, 6097, 6103, 6114, + 6120, 6129, 6135, 6158, 6164, 6173, 6179, 6190, + 6196, 6205, 6211, 6231, 6237, 6246, 6252, 6263, + 6269, 6278, 6284, 6309, 6315, 6324, 6330, 6341, + 6347, 6356, 6362, 6382, 6388, 6397, 6403, 6414, + 6420, 6429, 6435, 5303, 5309, 5318, 5324, 5335, + 5341, 5350, 5356, 5376, 5382, 5391, 5397, 5408, + 5414, 5423, 5429, 5454, 5460, 5469, 5475, 5486, + 5492, 5501, 5507, 5527, 5533, 5542, 5548, 5559, + 5565, 5574, 5580, 5603, 5609, 5618, 5624, 5635, + 5641, 5650, 5656, 5676, 5682, 5691, 5697, 5708, + 5714, 5723, 5729, 5754, 5760, 5769, 5775, 5786, + 5792, 5801, 5807, 5827, 5833, 5842, 5848, 5859, + 5865, 5874, 5880, 5744, 5750, 5759, 5765, 5776, + 5782, 5791, 5797, 5817, 5823, 5832, 5838, 5849, + 5855, 5864, 5870, 5895, 5901, 5910, 5916, 5927, + 5933, 5942, 5948, 5968, 5974, 5983, 5989, 6000, + 6006, 6015, 6021, 6044, 6050, 6059, 6065, 6076, + 6082, 6091, 6097, 6117, 6123, 6132, 6138, 6149, + 6155, 6164, 6170, 6195, 6201, 6210, 6216, 6227, + 6233, 6242, 6248, 6268, 6274, 6283, 6289, 6300, + 6306, 6315, 6321, 6116, 6122, 6131, 6137, 6148, + 6154, 6163, 6169, 6189, 6195, 6204, 6210, 6221, + 6227, 6236, 6242, 6267, 6273, 6282, 6288, 6299, + 6305, 6314, 6320, 6340, 6346, 6355, 6361, 6372, + 6378, 6387, 6393, 6416, 6422, 6431, 6437, 6448, + 6454, 6463, 6469, 6489, 6495, 6504, 6510, 6521, + 6527, 6536, 6542, 6567, 6573, 6582, 6588, 6599, + 6605, 6614, 6620, 6640, 6646, 6655, 6661, 6672, + 6678, 6687, 6693, 6557, 6563, 6572, 6578, 6589, + 6595, 6604, 6610, 6630, 6636, 6645, 6651, 6662, + 6668, 6677, 6683, 6708, 6714, 6723, 6729, 6740, + 6746, 6755, 6761, 6781, 6787, 6796, 6802, 6813, + 6819, 6828, 6834, 6857, 6863, 6872, 6878, 6889, + 6895, 6904, 6910, 6930, 6936, 6945, 6951, 6962, + 6968, 6977, 6983, 7008, 7014, 7023, 7029, 7040, + 7046, 7055, 7061, 7081, 7087, 7096, 7102, 7113, + 7119, 7128, 7134, 6392, 6398, 6407, 6413, 6424, + 6430, 6439, 6445, 6465, 6471, 6480, 6486, 6497, + 6503, 6512, 6518, 6543, 6549, 6558, 6564, 6575, + 6581, 6590, 6596, 6616, 6622, 6631, 6637, 6648, + 6654, 6663, 6669, 6692, 6698, 6707, 6713, 6724, + 6730, 6739, 6745, 6765, 6771, 6780, 6786, 6797, + 6803, 6812, 6818, 6843, 6849, 6858, 6864, 6875, + 6881, 6890, 6896, 6916, 6922, 6931, 6937, 6948, + 6954, 6963, 6969, 6833, 6839, 6848, 6854, 6865, + 6871, 6880, 6886, 6906, 6912, 6921, 6927, 6938, + 6944, 6953, 6959, 6984, 6990, 6999, 7005, 7016, + 7022, 7031, 7037, 7057, 7063, 7072, 7078, 7089, + 7095, 7104, 7110, 7133, 7139, 7148, 7154, 7165, + 7171, 7180, 7186, 7206, 7212, 7221, 7227, 7238, + 7244, 7253, 7259, 7284, 7290, 7299, 7305, 7316, + 7322, 7331, 7337, 7357, 7363, 7372, 7378, 7389, + 7395, 7404, 7410, 7205, 7211, 7220, 7226, 7237, + 7243, 7252, 7258, 7278, 7284, 7293, 7299, 7310, + 7316, 7325, 7331, 7356, 7362, 7371, 7377, 7388, + 7394, 7403, 7409, 7429, 7435, 7444, 7450, 7461, + 7467, 7476, 7482, 7505, 7511, 7520, 7526, 7537, + 7543, 7552, 7558, 7578, 7584, 7593, 7599, 7610, + 7616, 7625, 7631, 7656, 7662, 7671, 7677, 7688, + 7694, 7703, 7709, 7729, 7735, 7744, 7750, 7761 +}; + +static int VariableLevelCost(int level, const uint8_t probas[NUM_PROBAS]) { + int pattern = VP8LevelCodes[level - 1][0]; + int bits = VP8LevelCodes[level - 1][1]; + int cost = 0; + int i; + for (i = 2; pattern; ++i) { + if (pattern & 1) { + cost += VP8BitCost(bits & 1, probas[i]); + } + bits >>= 1; + pattern >>= 1; + } + return cost; +} + +//------------------------------------------------------------------------------ +// Pre-calc level costs once for all + +void VP8CalculateLevelCosts(VP8Proba* const proba) { + int ctype, band, ctx; + + if (!proba->dirty_) return; // nothing to do. + + for (ctype = 0; ctype < NUM_TYPES; ++ctype) { + for (band = 0; band < NUM_BANDS; ++band) { + for(ctx = 0; ctx < NUM_CTX; ++ctx) { + const uint8_t* const p = proba->coeffs_[ctype][band][ctx]; + uint16_t* const table = proba->level_cost_[ctype][band][ctx]; + const int cost_base = VP8BitCost(1, p[1]); + int v; + table[0] = VP8BitCost(0, p[1]); + for (v = 1; v <= MAX_VARIABLE_LEVEL; ++v) { + table[v] = cost_base + VariableLevelCost(v, p); + } + // Starting at level 67 and up, the variable part of the cost is + // actually constant. + } + } + } + proba->dirty_ = 0; +} + +//------------------------------------------------------------------------------ +// Mode cost tables. + +// These are the fixed probabilities (in the coding trees) turned into bit-cost +// by calling VP8BitCost(). +const uint16_t VP8FixedCostsUV[4] = { 302, 984, 439, 642 }; +// note: these values include the fixed VP8BitCost(1, 145) mode selection cost. +const uint16_t VP8FixedCostsI16[4] = { 663, 919, 872, 919 }; +const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES] = { + { { 251, 1362, 1934, 2085, 2314, 2230, 1839, 1988, 2437, 2348 }, + { 403, 680, 1507, 1519, 2060, 2005, 1992, 1914, 1924, 1733 }, + { 353, 1121, 973, 1895, 2060, 1787, 1671, 1516, 2012, 1868 }, + { 770, 852, 1581, 632, 1393, 1780, 1823, 1936, 1074, 1218 }, + { 510, 1270, 1467, 1319, 847, 1279, 1792, 2094, 1080, 1353 }, + { 488, 1322, 918, 1573, 1300, 883, 1814, 1752, 1756, 1502 }, + { 425, 992, 1820, 1514, 1843, 2440, 937, 1771, 1924, 1129 }, + { 363, 1248, 1257, 1970, 2194, 2385, 1569, 953, 1951, 1601 }, + { 723, 1257, 1631, 964, 963, 1508, 1697, 1824, 671, 1418 }, + { 635, 1038, 1573, 930, 1673, 1413, 1410, 1687, 1410, 749 } }, + { { 451, 613, 1345, 1702, 1870, 1716, 1728, 1766, 2190, 2310 }, + { 678, 453, 1171, 1443, 1925, 1831, 2045, 1781, 1887, 1602 }, + { 711, 666, 674, 1718, 1910, 1493, 1775, 1193, 2325, 2325 }, + { 883, 854, 1583, 542, 1800, 1878, 1664, 2149, 1207, 1087 }, + { 669, 994, 1248, 1122, 949, 1179, 1376, 1729, 1070, 1244 }, + { 715, 1026, 715, 1350, 1430, 930, 1717, 1296, 1479, 1479 }, + { 544, 841, 1656, 1450, 2094, 3883, 1010, 1759, 2076, 809 }, + { 610, 855, 957, 1553, 2067, 1561, 1704, 824, 2066, 1226 }, + { 833, 960, 1416, 819, 1277, 1619, 1501, 1617, 757, 1182 }, + { 711, 964, 1252, 879, 1441, 1828, 1508, 1636, 1594, 734 } }, + { { 605, 764, 734, 1713, 1747, 1192, 1819, 1353, 1877, 2392 }, + { 866, 641, 586, 1622, 2072, 1431, 1888, 1346, 2189, 1764 }, + { 901, 851, 456, 2165, 2281, 1405, 1739, 1193, 2183, 2443 }, + { 770, 1045, 952, 1078, 1342, 1191, 1436, 1063, 1303, 995 }, + { 901, 1086, 727, 1170, 884, 1105, 1267, 1401, 1739, 1337 }, + { 951, 1162, 595, 1488, 1388, 703, 1790, 1366, 2057, 1724 }, + { 534, 986, 1273, 1987, 3273, 1485, 1024, 1399, 1583, 866 }, + { 699, 1182, 695, 1978, 1726, 1986, 1326, 714, 1750, 1672 }, + { 951, 1217, 1209, 920, 1062, 1441, 1548, 999, 952, 932 }, + { 733, 1284, 784, 1256, 1557, 1098, 1257, 1357, 1414, 908 } }, + { { 316, 1075, 1653, 1220, 2145, 2051, 1730, 2131, 1884, 1790 }, + { 745, 516, 1404, 894, 1599, 2375, 2013, 2105, 1475, 1381 }, + { 516, 729, 1088, 1319, 1637, 3426, 1636, 1275, 1531, 1453 }, + { 894, 943, 2138, 468, 1704, 2259, 2069, 1763, 1266, 1158 }, + { 605, 1025, 1235, 871, 1170, 1767, 1493, 1500, 1104, 1258 }, + { 739, 826, 1207, 1151, 1412, 846, 1305, 2726, 1014, 1569 }, + { 558, 825, 1820, 1398, 3344, 1556, 1218, 1550, 1228, 878 }, + { 429, 951, 1089, 1816, 3861, 3861, 1556, 969, 1568, 1828 }, + { 883, 961, 1752, 769, 1468, 1810, 2081, 2346, 613, 1298 }, + { 803, 895, 1372, 641, 1303, 1708, 1686, 1700, 1306, 1033 } }, + { { 439, 1267, 1270, 1579, 963, 1193, 1723, 1729, 1198, 1993 }, + { 705, 725, 1029, 1153, 1176, 1103, 1821, 1567, 1259, 1574 }, + { 723, 859, 802, 1253, 972, 1202, 1407, 1665, 1520, 1674 }, + { 894, 960, 1254, 887, 1052, 1607, 1344, 1349, 865, 1150 }, + { 833, 1312, 1337, 1205, 572, 1288, 1414, 1529, 1088, 1430 }, + { 842, 1279, 1068, 1861, 862, 688, 1861, 1630, 1039, 1381 }, + { 766, 938, 1279, 1546, 3338, 1550, 1031, 1542, 1288, 640 }, + { 715, 1090, 835, 1609, 1100, 1100, 1603, 1019, 1102, 1617 }, + { 894, 1813, 1500, 1188, 789, 1194, 1491, 1919, 617, 1333 }, + { 610, 1076, 1644, 1281, 1283, 975, 1179, 1688, 1434, 889 } }, + { { 544, 971, 1146, 1849, 1221, 740, 1857, 1621, 1683, 2430 }, + { 723, 705, 961, 1371, 1426, 821, 2081, 2079, 1839, 1380 }, + { 783, 857, 703, 2145, 1419, 814, 1791, 1310, 1609, 2206 }, + { 997, 1000, 1153, 792, 1229, 1162, 1810, 1418, 942, 979 }, + { 901, 1226, 883, 1289, 793, 715, 1904, 1649, 1319, 3108 }, + { 979, 1478, 782, 2216, 1454, 455, 3092, 1591, 1997, 1664 }, + { 663, 1110, 1504, 1114, 1522, 3311, 676, 1522, 1530, 1024 }, + { 605, 1138, 1153, 1314, 1569, 1315, 1157, 804, 1574, 1320 }, + { 770, 1216, 1218, 1227, 869, 1384, 1232, 1375, 834, 1239 }, + { 775, 1007, 843, 1216, 1225, 1074, 2527, 1479, 1149, 975 } }, + { { 477, 817, 1309, 1439, 1708, 1454, 1159, 1241, 1945, 1672 }, + { 577, 796, 1112, 1271, 1618, 1458, 1087, 1345, 1831, 1265 }, + { 663, 776, 753, 1940, 1690, 1690, 1227, 1097, 3149, 1361 }, + { 766, 1299, 1744, 1161, 1565, 1106, 1045, 1230, 1232, 707 }, + { 915, 1026, 1404, 1182, 1184, 851, 1428, 2425, 1043, 789 }, + { 883, 1456, 790, 1082, 1086, 985, 1083, 1484, 1238, 1160 }, + { 507, 1345, 2261, 1995, 1847, 3636, 653, 1761, 2287, 933 }, + { 553, 1193, 1470, 2057, 2059, 2059, 833, 779, 2058, 1263 }, + { 766, 1275, 1515, 1039, 957, 1554, 1286, 1540, 1289, 705 }, + { 499, 1378, 1496, 1385, 1850, 1850, 1044, 2465, 1515, 720 } }, + { { 553, 930, 978, 2077, 1968, 1481, 1457, 761, 1957, 2362 }, + { 694, 864, 905, 1720, 1670, 1621, 1429, 718, 2125, 1477 }, + { 699, 968, 658, 3190, 2024, 1479, 1865, 750, 2060, 2320 }, + { 733, 1308, 1296, 1062, 1576, 1322, 1062, 1112, 1172, 816 }, + { 920, 927, 1052, 939, 947, 1156, 1152, 1073, 3056, 1268 }, + { 723, 1534, 711, 1547, 1294, 892, 1553, 928, 1815, 1561 }, + { 663, 1366, 1583, 2111, 1712, 3501, 522, 1155, 2130, 1133 }, + { 614, 1731, 1188, 2343, 1944, 3733, 1287, 487, 3546, 1758 }, + { 770, 1585, 1312, 826, 884, 2673, 1185, 1006, 1195, 1195 }, + { 758, 1333, 1273, 1023, 1621, 1162, 1351, 833, 1479, 862 } }, + { { 376, 1193, 1446, 1149, 1545, 1577, 1870, 1789, 1175, 1823 }, + { 803, 633, 1136, 1058, 1350, 1323, 1598, 2247, 1072, 1252 }, + { 614, 1048, 943, 981, 1152, 1869, 1461, 1020, 1618, 1618 }, + { 1107, 1085, 1282, 592, 1779, 1933, 1648, 2403, 691, 1246 }, + { 851, 1309, 1223, 1243, 895, 1593, 1792, 2317, 627, 1076 }, + { 770, 1216, 1030, 1125, 921, 981, 1629, 1131, 1049, 1646 }, + { 626, 1469, 1456, 1081, 1489, 3278, 981, 1232, 1498, 733 }, + { 617, 1201, 812, 1220, 1476, 1476, 1478, 970, 1228, 1488 }, + { 1179, 1393, 1540, 999, 1243, 1503, 1916, 1925, 414, 1614 }, + { 943, 1088, 1490, 682, 1112, 1372, 1756, 1505, 966, 966 } }, + { { 322, 1142, 1589, 1396, 2144, 1859, 1359, 1925, 2084, 1518 }, + { 617, 625, 1241, 1234, 2121, 1615, 1524, 1858, 1720, 1004 }, + { 553, 851, 786, 1299, 1452, 1560, 1372, 1561, 1967, 1713 }, + { 770, 977, 1396, 568, 1893, 1639, 1540, 2108, 1430, 1013 }, + { 684, 1120, 1375, 982, 930, 2719, 1638, 1643, 933, 993 }, + { 553, 1103, 996, 1356, 1361, 1005, 1507, 1761, 1184, 1268 }, + { 419, 1247, 1537, 1554, 1817, 3606, 1026, 1666, 1829, 923 }, + { 439, 1139, 1101, 1257, 3710, 1922, 1205, 1040, 1931, 1529 }, + { 979, 935, 1269, 847, 1202, 1286, 1530, 1535, 827, 1036 }, + { 516, 1378, 1569, 1110, 1798, 1798, 1198, 2199, 1543, 712 } }, +}; + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/cost.h b/drivers/webpold/enc/cost.h new file mode 100644 index 0000000000..09b75b699d --- /dev/null +++ b/drivers/webpold/enc/cost.h @@ -0,0 +1,48 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Cost tables for level and modes. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_ENC_COST_H_ +#define WEBP_ENC_COST_H_ + +#include "./vp8enci.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +extern const uint16_t VP8LevelFixedCosts[2048]; // approximate cost per level +extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p) + +// Cost of coding one event with probability 'proba'. +static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) { + return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba]; +} + +// Level cost calculations +extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2]; +void VP8CalculateLevelCosts(VP8Proba* const proba); +static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) { + return VP8LevelFixedCosts[level] + + table[(level > MAX_VARIABLE_LEVEL) ? MAX_VARIABLE_LEVEL : level]; +} + +// Mode costs +extern const uint16_t VP8FixedCostsUV[4]; +extern const uint16_t VP8FixedCostsI16[4]; +extern const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES]; + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_ENC_COST_H_ */ diff --git a/drivers/webpold/enc/filter.c b/drivers/webpold/enc/filter.c new file mode 100644 index 0000000000..7fb78a3949 --- /dev/null +++ b/drivers/webpold/enc/filter.c @@ -0,0 +1,409 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Selecting filter level +// +// Author: somnath@google.com (Somnath Banerjee) + +#include "./vp8enci.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// NOTE: clip1, tables and InitTables are repeated entries of dsp.c +static uint8_t abs0[255 + 255 + 1]; // abs(i) +static uint8_t abs1[255 + 255 + 1]; // abs(i)>>1 +static int8_t sclip1[1020 + 1020 + 1]; // clips [-1020, 1020] to [-128, 127] +static int8_t sclip2[112 + 112 + 1]; // clips [-112, 112] to [-16, 15] +static uint8_t clip1[255 + 510 + 1]; // clips [-255,510] to [0,255] + +static int tables_ok = 0; + +static void InitTables(void) { + if (!tables_ok) { + int i; + for (i = -255; i <= 255; ++i) { + abs0[255 + i] = (i < 0) ? -i : i; + abs1[255 + i] = abs0[255 + i] >> 1; + } + for (i = -1020; i <= 1020; ++i) { + sclip1[1020 + i] = (i < -128) ? -128 : (i > 127) ? 127 : i; + } + for (i = -112; i <= 112; ++i) { + sclip2[112 + i] = (i < -16) ? -16 : (i > 15) ? 15 : i; + } + for (i = -255; i <= 255 + 255; ++i) { + clip1[255 + i] = (i < 0) ? 0 : (i > 255) ? 255 : i; + } + tables_ok = 1; + } +} + +//------------------------------------------------------------------------------ +// Edge filtering functions + +// 4 pixels in, 2 pixels out +static WEBP_INLINE void do_filter2(uint8_t* p, int step) { + const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; + const int a = 3 * (q0 - p0) + sclip1[1020 + p1 - q1]; + const int a1 = sclip2[112 + ((a + 4) >> 3)]; + const int a2 = sclip2[112 + ((a + 3) >> 3)]; + p[-step] = clip1[255 + p0 + a2]; + p[ 0] = clip1[255 + q0 - a1]; +} + +// 4 pixels in, 4 pixels out +static WEBP_INLINE void do_filter4(uint8_t* p, int step) { + const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; + const int a = 3 * (q0 - p0); + const int a1 = sclip2[112 + ((a + 4) >> 3)]; + const int a2 = sclip2[112 + ((a + 3) >> 3)]; + const int a3 = (a1 + 1) >> 1; + p[-2*step] = clip1[255 + p1 + a3]; + p[- step] = clip1[255 + p0 + a2]; + p[ 0] = clip1[255 + q0 - a1]; + p[ step] = clip1[255 + q1 - a3]; +} + +// high edge-variance +static WEBP_INLINE int hev(const uint8_t* p, int step, int thresh) { + const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; + return (abs0[255 + p1 - p0] > thresh) || (abs0[255 + q1 - q0] > thresh); +} + +static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int thresh) { + const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step]; + return (2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) <= thresh; +} + +static WEBP_INLINE int needs_filter2(const uint8_t* p, + int step, int t, int it) { + const int p3 = p[-4*step], p2 = p[-3*step], p1 = p[-2*step], p0 = p[-step]; + const int q0 = p[0], q1 = p[step], q2 = p[2*step], q3 = p[3*step]; + if ((2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) > t) + return 0; + return abs0[255 + p3 - p2] <= it && abs0[255 + p2 - p1] <= it && + abs0[255 + p1 - p0] <= it && abs0[255 + q3 - q2] <= it && + abs0[255 + q2 - q1] <= it && abs0[255 + q1 - q0] <= it; +} + +//------------------------------------------------------------------------------ +// Simple In-loop filtering (Paragraph 15.2) + +static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { + int i; + for (i = 0; i < 16; ++i) { + if (needs_filter(p + i, stride, thresh)) { + do_filter2(p + i, stride); + } + } +} + +static void SimpleHFilter16(uint8_t* p, int stride, int thresh) { + int i; + for (i = 0; i < 16; ++i) { + if (needs_filter(p + i * stride, 1, thresh)) { + do_filter2(p + i * stride, 1); + } + } +} + +static void SimpleVFilter16i(uint8_t* p, int stride, int thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4 * stride; + SimpleVFilter16(p, stride, thresh); + } +} + +static void SimpleHFilter16i(uint8_t* p, int stride, int thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4; + SimpleHFilter16(p, stride, thresh); + } +} + +//------------------------------------------------------------------------------ +// Complex In-loop filtering (Paragraph 15.3) + +static WEBP_INLINE void FilterLoop24(uint8_t* p, + int hstride, int vstride, int size, + int thresh, int ithresh, int hev_thresh) { + while (size-- > 0) { + if (needs_filter2(p, hstride, thresh, ithresh)) { + if (hev(p, hstride, hev_thresh)) { + do_filter2(p, hstride); + } else { + do_filter4(p, hstride); + } + } + p += vstride; + } +} + +// on three inner edges +static void VFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4 * stride; + FilterLoop24(p, stride, 1, 16, thresh, ithresh, hev_thresh); + } +} + +static void HFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + int k; + for (k = 3; k > 0; --k) { + p += 4; + FilterLoop24(p, 1, stride, 16, thresh, ithresh, hev_thresh); + } +} + +static void VFilter8i(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + FilterLoop24(u + 4 * stride, stride, 1, 8, thresh, ithresh, hev_thresh); + FilterLoop24(v + 4 * stride, stride, 1, 8, thresh, ithresh, hev_thresh); +} + +static void HFilter8i(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_thresh) { + FilterLoop24(u + 4, 1, stride, 8, thresh, ithresh, hev_thresh); + FilterLoop24(v + 4, 1, stride, 8, thresh, ithresh, hev_thresh); +} + +//------------------------------------------------------------------------------ + +void (*VP8EncVFilter16i)(uint8_t*, int, int, int, int) = VFilter16i; +void (*VP8EncHFilter16i)(uint8_t*, int, int, int, int) = HFilter16i; +void (*VP8EncVFilter8i)(uint8_t*, uint8_t*, int, int, int, int) = VFilter8i; +void (*VP8EncHFilter8i)(uint8_t*, uint8_t*, int, int, int, int) = HFilter8i; + +void (*VP8EncSimpleVFilter16i)(uint8_t*, int, int) = SimpleVFilter16i; +void (*VP8EncSimpleHFilter16i)(uint8_t*, int, int) = SimpleHFilter16i; + +//------------------------------------------------------------------------------ +// Paragraph 15.4: compute the inner-edge filtering strength + +static int GetILevel(int sharpness, int level) { + if (sharpness > 0) { + if (sharpness > 4) { + level >>= 2; + } else { + level >>= 1; + } + if (level > 9 - sharpness) { + level = 9 - sharpness; + } + } + if (level < 1) level = 1; + return level; +} + +static void DoFilter(const VP8EncIterator* const it, int level) { + const VP8Encoder* const enc = it->enc_; + const int ilevel = GetILevel(enc->config_->filter_sharpness, level); + const int limit = 2 * level + ilevel; + + uint8_t* const y_dst = it->yuv_out2_ + Y_OFF; + uint8_t* const u_dst = it->yuv_out2_ + U_OFF; + uint8_t* const v_dst = it->yuv_out2_ + V_OFF; + + // copy current block to yuv_out2_ + memcpy(y_dst, it->yuv_out_, YUV_SIZE * sizeof(uint8_t)); + + if (enc->filter_hdr_.simple_ == 1) { // simple + VP8EncSimpleHFilter16i(y_dst, BPS, limit); + VP8EncSimpleVFilter16i(y_dst, BPS, limit); + } else { // complex + const int hev_thresh = (level >= 40) ? 2 : (level >= 15) ? 1 : 0; + VP8EncHFilter16i(y_dst, BPS, limit, ilevel, hev_thresh); + VP8EncHFilter8i(u_dst, v_dst, BPS, limit, ilevel, hev_thresh); + VP8EncVFilter16i(y_dst, BPS, limit, ilevel, hev_thresh); + VP8EncVFilter8i(u_dst, v_dst, BPS, limit, ilevel, hev_thresh); + } +} + +//------------------------------------------------------------------------------ +// SSIM metric + +enum { KERNEL = 3 }; +static const double kMinValue = 1.e-10; // minimal threshold + +void VP8SSIMAddStats(const DistoStats* const src, DistoStats* const dst) { + dst->w += src->w; + dst->xm += src->xm; + dst->ym += src->ym; + dst->xxm += src->xxm; + dst->xym += src->xym; + dst->yym += src->yym; +} + +static void VP8SSIMAccumulate(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int xo, int yo, int W, int H, + DistoStats* const stats) { + const int ymin = (yo - KERNEL < 0) ? 0 : yo - KERNEL; + const int ymax = (yo + KERNEL > H - 1) ? H - 1 : yo + KERNEL; + const int xmin = (xo - KERNEL < 0) ? 0 : xo - KERNEL; + const int xmax = (xo + KERNEL > W - 1) ? W - 1 : xo + KERNEL; + int x, y; + src1 += ymin * stride1; + src2 += ymin * stride2; + for (y = ymin; y <= ymax; ++y, src1 += stride1, src2 += stride2) { + for (x = xmin; x <= xmax; ++x) { + const int s1 = src1[x]; + const int s2 = src2[x]; + stats->w += 1; + stats->xm += s1; + stats->ym += s2; + stats->xxm += s1 * s1; + stats->xym += s1 * s2; + stats->yym += s2 * s2; + } + } +} + +double VP8SSIMGet(const DistoStats* const stats) { + const double xmxm = stats->xm * stats->xm; + const double ymym = stats->ym * stats->ym; + const double xmym = stats->xm * stats->ym; + const double w2 = stats->w * stats->w; + double sxx = stats->xxm * stats->w - xmxm; + double syy = stats->yym * stats->w - ymym; + double sxy = stats->xym * stats->w - xmym; + double C1, C2; + double fnum; + double fden; + // small errors are possible, due to rounding. Clamp to zero. + if (sxx < 0.) sxx = 0.; + if (syy < 0.) syy = 0.; + C1 = 6.5025 * w2; + C2 = 58.5225 * w2; + fnum = (2 * xmym + C1) * (2 * sxy + C2); + fden = (xmxm + ymym + C1) * (sxx + syy + C2); + return (fden != 0.) ? fnum / fden : kMinValue; +} + +double VP8SSIMGetSquaredError(const DistoStats* const s) { + if (s->w > 0.) { + const double iw2 = 1. / (s->w * s->w); + const double sxx = s->xxm * s->w - s->xm * s->xm; + const double syy = s->yym * s->w - s->ym * s->ym; + const double sxy = s->xym * s->w - s->xm * s->ym; + const double SSE = iw2 * (sxx + syy - 2. * sxy); + if (SSE > kMinValue) return SSE; + } + return kMinValue; +} + +void VP8SSIMAccumulatePlane(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int W, int H, DistoStats* const stats) { + int x, y; + for (y = 0; y < H; ++y) { + for (x = 0; x < W; ++x) { + VP8SSIMAccumulate(src1, stride1, src2, stride2, x, y, W, H, stats); + } + } +} + +static double GetMBSSIM(const uint8_t* yuv1, const uint8_t* yuv2) { + int x, y; + DistoStats s = { .0, .0, .0, .0, .0, .0 }; + + // compute SSIM in a 10 x 10 window + for (x = 3; x < 13; x++) { + for (y = 3; y < 13; y++) { + VP8SSIMAccumulate(yuv1 + Y_OFF, BPS, yuv2 + Y_OFF, BPS, x, y, 16, 16, &s); + } + } + for (x = 1; x < 7; x++) { + for (y = 1; y < 7; y++) { + VP8SSIMAccumulate(yuv1 + U_OFF, BPS, yuv2 + U_OFF, BPS, x, y, 8, 8, &s); + VP8SSIMAccumulate(yuv1 + V_OFF, BPS, yuv2 + V_OFF, BPS, x, y, 8, 8, &s); + } + } + return VP8SSIMGet(&s); +} + +//------------------------------------------------------------------------------ +// Exposed APIs: Encoder should call the following 3 functions to adjust +// loop filter strength + +void VP8InitFilter(VP8EncIterator* const it) { + int s, i; + if (!it->lf_stats_) return; + + InitTables(); + for (s = 0; s < NUM_MB_SEGMENTS; s++) { + for (i = 0; i < MAX_LF_LEVELS; i++) { + (*it->lf_stats_)[s][i] = 0; + } + } +} + +void VP8StoreFilterStats(VP8EncIterator* const it) { + int d; + const int s = it->mb_->segment_; + const int level0 = it->enc_->dqm_[s].fstrength_; // TODO: ref_lf_delta[] + + // explore +/-quant range of values around level0 + const int delta_min = -it->enc_->dqm_[s].quant_; + const int delta_max = it->enc_->dqm_[s].quant_; + const int step_size = (delta_max - delta_min >= 4) ? 4 : 1; + + if (!it->lf_stats_) return; + + // NOTE: Currently we are applying filter only across the sublock edges + // There are two reasons for that. + // 1. Applying filter on macro block edges will change the pixels in + // the left and top macro blocks. That will be hard to restore + // 2. Macro Blocks on the bottom and right are not yet compressed. So we + // cannot apply filter on the right and bottom macro block edges. + if (it->mb_->type_ == 1 && it->mb_->skip_) return; + + // Always try filter level zero + (*it->lf_stats_)[s][0] += GetMBSSIM(it->yuv_in_, it->yuv_out_); + + for (d = delta_min; d <= delta_max; d += step_size) { + const int level = level0 + d; + if (level <= 0 || level >= MAX_LF_LEVELS) { + continue; + } + DoFilter(it, level); + (*it->lf_stats_)[s][level] += GetMBSSIM(it->yuv_in_, it->yuv_out2_); + } +} + +void VP8AdjustFilterStrength(VP8EncIterator* const it) { + int s; + VP8Encoder* const enc = it->enc_; + + if (!it->lf_stats_) { + return; + } + for (s = 0; s < NUM_MB_SEGMENTS; s++) { + int i, best_level = 0; + // Improvement over filter level 0 should be at least 1e-5 (relatively) + double best_v = 1.00001 * (*it->lf_stats_)[s][0]; + for (i = 1; i < MAX_LF_LEVELS; i++) { + const double v = (*it->lf_stats_)[s][i]; + if (v > best_v) { + best_v = v; + best_level = i; + } + } + enc->dqm_[s].fstrength_ = best_level; + } +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/frame.c b/drivers/webpold/enc/frame.c new file mode 100644 index 0000000000..bdd360069b --- /dev/null +++ b/drivers/webpold/enc/frame.c @@ -0,0 +1,939 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// frame coding and analysis +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include <math.h> + +#include "./vp8enci.h" +#include "./cost.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define SEGMENT_VISU 0 +#define DEBUG_SEARCH 0 // useful to track search convergence + +// On-the-fly info about the current set of residuals. Handy to avoid +// passing zillions of params. +typedef struct { + int first; + int last; + const int16_t* coeffs; + + int coeff_type; + ProbaArray* prob; + StatsArray* stats; + CostArray* cost; +} VP8Residual; + +//------------------------------------------------------------------------------ +// Tables for level coding + +const uint8_t VP8EncBands[16 + 1] = { + 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, + 0 // sentinel +}; + +static const uint8_t kCat3[] = { 173, 148, 140 }; +static const uint8_t kCat4[] = { 176, 155, 140, 135 }; +static const uint8_t kCat5[] = { 180, 157, 141, 134, 130 }; +static const uint8_t kCat6[] = + { 254, 254, 243, 230, 196, 177, 153, 140, 133, 130, 129 }; + +//------------------------------------------------------------------------------ +// Reset the statistics about: number of skips, token proba, level cost,... + +static void ResetStats(VP8Encoder* const enc) { + VP8Proba* const proba = &enc->proba_; + VP8CalculateLevelCosts(proba); + proba->nb_skip_ = 0; +} + +//------------------------------------------------------------------------------ +// Skip decision probability + +#define SKIP_PROBA_THRESHOLD 250 // value below which using skip_proba is OK. + +static int CalcSkipProba(uint64_t nb, uint64_t total) { + return (int)(total ? (total - nb) * 255 / total : 255); +} + +// Returns the bit-cost for coding the skip probability. +static int FinalizeSkipProba(VP8Encoder* const enc) { + VP8Proba* const proba = &enc->proba_; + const int nb_mbs = enc->mb_w_ * enc->mb_h_; + const int nb_events = proba->nb_skip_; + int size; + proba->skip_proba_ = CalcSkipProba(nb_events, nb_mbs); + proba->use_skip_proba_ = (proba->skip_proba_ < SKIP_PROBA_THRESHOLD); + size = 256; // 'use_skip_proba' bit + if (proba->use_skip_proba_) { + size += nb_events * VP8BitCost(1, proba->skip_proba_) + + (nb_mbs - nb_events) * VP8BitCost(0, proba->skip_proba_); + size += 8 * 256; // cost of signaling the skip_proba_ itself. + } + return size; +} + +//------------------------------------------------------------------------------ +// Recording of token probabilities. + +static void ResetTokenStats(VP8Encoder* const enc) { + VP8Proba* const proba = &enc->proba_; + memset(proba->stats_, 0, sizeof(proba->stats_)); +} + +// Record proba context used +static int Record(int bit, proba_t* const stats) { + proba_t p = *stats; + if (p >= 0xffff0000u) { // an overflow is inbound. + p = ((p + 1u) >> 1) & 0x7fff7fffu; // -> divide the stats by 2. + } + // record bit count (lower 16 bits) and increment total count (upper 16 bits). + p += 0x00010000u + bit; + *stats = p; + return bit; +} + +// We keep the table free variant around for reference, in case. +#define USE_LEVEL_CODE_TABLE + +// Simulate block coding, but only record statistics. +// Note: no need to record the fixed probas. +static int RecordCoeffs(int ctx, const VP8Residual* const res) { + int n = res->first; + proba_t* s = res->stats[VP8EncBands[n]][ctx]; + if (res->last < 0) { + Record(0, s + 0); + return 0; + } + while (n <= res->last) { + int v; + Record(1, s + 0); + while ((v = res->coeffs[n++]) == 0) { + Record(0, s + 1); + s = res->stats[VP8EncBands[n]][0]; + } + Record(1, s + 1); + if (!Record(2u < (unsigned int)(v + 1), s + 2)) { // v = -1 or 1 + s = res->stats[VP8EncBands[n]][1]; + } else { + v = abs(v); +#if !defined(USE_LEVEL_CODE_TABLE) + if (!Record(v > 4, s + 3)) { + if (Record(v != 2, s + 4)) + Record(v == 4, s + 5); + } else if (!Record(v > 10, s + 6)) { + Record(v > 6, s + 7); + } else if (!Record((v >= 3 + (8 << 2)), s + 8)) { + Record((v >= 3 + (8 << 1)), s + 9); + } else { + Record((v >= 3 + (8 << 3)), s + 10); + } +#else + if (v > MAX_VARIABLE_LEVEL) + v = MAX_VARIABLE_LEVEL; + + { + const int bits = VP8LevelCodes[v - 1][1]; + int pattern = VP8LevelCodes[v - 1][0]; + int i; + for (i = 0; (pattern >>= 1) != 0; ++i) { + const int mask = 2 << i; + if (pattern & 1) Record(!!(bits & mask), s + 3 + i); + } + } +#endif + s = res->stats[VP8EncBands[n]][2]; + } + } + if (n < 16) Record(0, s + 0); + return 1; +} + +// Collect statistics and deduce probabilities for next coding pass. +// Return the total bit-cost for coding the probability updates. +static int CalcTokenProba(int nb, int total) { + assert(nb <= total); + return nb ? (255 - nb * 255 / total) : 255; +} + +// Cost of coding 'nb' 1's and 'total-nb' 0's using 'proba' probability. +static int BranchCost(int nb, int total, int proba) { + return nb * VP8BitCost(1, proba) + (total - nb) * VP8BitCost(0, proba); +} + +static int FinalizeTokenProbas(VP8Encoder* const enc) { + VP8Proba* const proba = &enc->proba_; + int has_changed = 0; + int size = 0; + int t, b, c, p; + for (t = 0; t < NUM_TYPES; ++t) { + for (b = 0; b < NUM_BANDS; ++b) { + for (c = 0; c < NUM_CTX; ++c) { + for (p = 0; p < NUM_PROBAS; ++p) { + const proba_t stats = proba->stats_[t][b][c][p]; + const int nb = (stats >> 0) & 0xffff; + const int total = (stats >> 16) & 0xffff; + const int update_proba = VP8CoeffsUpdateProba[t][b][c][p]; + const int old_p = VP8CoeffsProba0[t][b][c][p]; + const int new_p = CalcTokenProba(nb, total); + const int old_cost = BranchCost(nb, total, old_p) + + VP8BitCost(0, update_proba); + const int new_cost = BranchCost(nb, total, new_p) + + VP8BitCost(1, update_proba) + + 8 * 256; + const int use_new_p = (old_cost > new_cost); + size += VP8BitCost(use_new_p, update_proba); + if (use_new_p) { // only use proba that seem meaningful enough. + proba->coeffs_[t][b][c][p] = new_p; + has_changed |= (new_p != old_p); + size += 8 * 256; + } else { + proba->coeffs_[t][b][c][p] = old_p; + } + } + } + } + } + proba->dirty_ = has_changed; + return size; +} + +//------------------------------------------------------------------------------ +// helper functions for residuals struct VP8Residual. + +static void InitResidual(int first, int coeff_type, + VP8Encoder* const enc, VP8Residual* const res) { + res->coeff_type = coeff_type; + res->prob = enc->proba_.coeffs_[coeff_type]; + res->stats = enc->proba_.stats_[coeff_type]; + res->cost = enc->proba_.level_cost_[coeff_type]; + res->first = first; +} + +static void SetResidualCoeffs(const int16_t* const coeffs, + VP8Residual* const res) { + int n; + res->last = -1; + for (n = 15; n >= res->first; --n) { + if (coeffs[n]) { + res->last = n; + break; + } + } + res->coeffs = coeffs; +} + +//------------------------------------------------------------------------------ +// Mode costs + +static int GetResidualCost(int ctx, const VP8Residual* const res) { + int n = res->first; + int p0 = res->prob[VP8EncBands[n]][ctx][0]; + const uint16_t* t = res->cost[VP8EncBands[n]][ctx]; + int cost; + + if (res->last < 0) { + return VP8BitCost(0, p0); + } + cost = 0; + while (n <= res->last) { + const int v = res->coeffs[n]; + const int b = VP8EncBands[n + 1]; + ++n; + if (v == 0) { + // short-case for VP8LevelCost(t, 0) (note: VP8LevelFixedCosts[0] == 0): + cost += t[0]; + t = res->cost[b][0]; + continue; + } + cost += VP8BitCost(1, p0); + if (2u >= (unsigned int)(v + 1)) { // v = -1 or 1 + // short-case for "VP8LevelCost(t, 1)" (256 is VP8LevelFixedCosts[1]): + cost += 256 + t[1]; + p0 = res->prob[b][1][0]; + t = res->cost[b][1]; + } else { + cost += VP8LevelCost(t, abs(v)); + p0 = res->prob[b][2][0]; + t = res->cost[b][2]; + } + } + if (n < 16) cost += VP8BitCost(0, p0); + return cost; +} + +int VP8GetCostLuma4(VP8EncIterator* const it, const int16_t levels[16]) { + const int x = (it->i4_ & 3), y = (it->i4_ >> 2); + VP8Residual res; + VP8Encoder* const enc = it->enc_; + int R = 0; + int ctx; + + InitResidual(0, 3, enc, &res); + ctx = it->top_nz_[x] + it->left_nz_[y]; + SetResidualCoeffs(levels, &res); + R += GetResidualCost(ctx, &res); + return R; +} + +int VP8GetCostLuma16(VP8EncIterator* const it, const VP8ModeScore* const rd) { + VP8Residual res; + VP8Encoder* const enc = it->enc_; + int x, y; + int R = 0; + + VP8IteratorNzToBytes(it); // re-import the non-zero context + + // DC + InitResidual(0, 1, enc, &res); + SetResidualCoeffs(rd->y_dc_levels, &res); + R += GetResidualCost(it->top_nz_[8] + it->left_nz_[8], &res); + + // AC + InitResidual(1, 0, enc, &res); + for (y = 0; y < 4; ++y) { + for (x = 0; x < 4; ++x) { + const int ctx = it->top_nz_[x] + it->left_nz_[y]; + SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + R += GetResidualCost(ctx, &res); + it->top_nz_[x] = it->left_nz_[y] = (res.last >= 0); + } + } + return R; +} + +int VP8GetCostUV(VP8EncIterator* const it, const VP8ModeScore* const rd) { + VP8Residual res; + VP8Encoder* const enc = it->enc_; + int ch, x, y; + int R = 0; + + VP8IteratorNzToBytes(it); // re-import the non-zero context + + InitResidual(0, 2, enc, &res); + for (ch = 0; ch <= 2; ch += 2) { + for (y = 0; y < 2; ++y) { + for (x = 0; x < 2; ++x) { + const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; + SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); + R += GetResidualCost(ctx, &res); + it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = (res.last >= 0); + } + } + } + return R; +} + +//------------------------------------------------------------------------------ +// Coefficient coding + +static int PutCoeffs(VP8BitWriter* const bw, int ctx, const VP8Residual* res) { + int n = res->first; + const uint8_t* p = res->prob[VP8EncBands[n]][ctx]; + if (!VP8PutBit(bw, res->last >= 0, p[0])) { + return 0; + } + + while (n < 16) { + const int c = res->coeffs[n++]; + const int sign = c < 0; + int v = sign ? -c : c; + if (!VP8PutBit(bw, v != 0, p[1])) { + p = res->prob[VP8EncBands[n]][0]; + continue; + } + if (!VP8PutBit(bw, v > 1, p[2])) { + p = res->prob[VP8EncBands[n]][1]; + } else { + if (!VP8PutBit(bw, v > 4, p[3])) { + if (VP8PutBit(bw, v != 2, p[4])) + VP8PutBit(bw, v == 4, p[5]); + } else if (!VP8PutBit(bw, v > 10, p[6])) { + if (!VP8PutBit(bw, v > 6, p[7])) { + VP8PutBit(bw, v == 6, 159); + } else { + VP8PutBit(bw, v >= 9, 165); + VP8PutBit(bw, !(v & 1), 145); + } + } else { + int mask; + const uint8_t* tab; + if (v < 3 + (8 << 1)) { // kCat3 (3b) + VP8PutBit(bw, 0, p[8]); + VP8PutBit(bw, 0, p[9]); + v -= 3 + (8 << 0); + mask = 1 << 2; + tab = kCat3; + } else if (v < 3 + (8 << 2)) { // kCat4 (4b) + VP8PutBit(bw, 0, p[8]); + VP8PutBit(bw, 1, p[9]); + v -= 3 + (8 << 1); + mask = 1 << 3; + tab = kCat4; + } else if (v < 3 + (8 << 3)) { // kCat5 (5b) + VP8PutBit(bw, 1, p[8]); + VP8PutBit(bw, 0, p[10]); + v -= 3 + (8 << 2); + mask = 1 << 4; + tab = kCat5; + } else { // kCat6 (11b) + VP8PutBit(bw, 1, p[8]); + VP8PutBit(bw, 1, p[10]); + v -= 3 + (8 << 3); + mask = 1 << 10; + tab = kCat6; + } + while (mask) { + VP8PutBit(bw, !!(v & mask), *tab++); + mask >>= 1; + } + } + p = res->prob[VP8EncBands[n]][2]; + } + VP8PutBitUniform(bw, sign); + if (n == 16 || !VP8PutBit(bw, n <= res->last, p[0])) { + return 1; // EOB + } + } + return 1; +} + +static void CodeResiduals(VP8BitWriter* const bw, + VP8EncIterator* const it, + const VP8ModeScore* const rd) { + int x, y, ch; + VP8Residual res; + uint64_t pos1, pos2, pos3; + const int i16 = (it->mb_->type_ == 1); + const int segment = it->mb_->segment_; + VP8Encoder* const enc = it->enc_; + + VP8IteratorNzToBytes(it); + + pos1 = VP8BitWriterPos(bw); + if (i16) { + InitResidual(0, 1, enc, &res); + SetResidualCoeffs(rd->y_dc_levels, &res); + it->top_nz_[8] = it->left_nz_[8] = + PutCoeffs(bw, it->top_nz_[8] + it->left_nz_[8], &res); + InitResidual(1, 0, enc, &res); + } else { + InitResidual(0, 3, enc, &res); + } + + // luma-AC + for (y = 0; y < 4; ++y) { + for (x = 0; x < 4; ++x) { + const int ctx = it->top_nz_[x] + it->left_nz_[y]; + SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + it->top_nz_[x] = it->left_nz_[y] = PutCoeffs(bw, ctx, &res); + } + } + pos2 = VP8BitWriterPos(bw); + + // U/V + InitResidual(0, 2, enc, &res); + for (ch = 0; ch <= 2; ch += 2) { + for (y = 0; y < 2; ++y) { + for (x = 0; x < 2; ++x) { + const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; + SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); + it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = + PutCoeffs(bw, ctx, &res); + } + } + } + pos3 = VP8BitWriterPos(bw); + it->luma_bits_ = pos2 - pos1; + it->uv_bits_ = pos3 - pos2; + it->bit_count_[segment][i16] += it->luma_bits_; + it->bit_count_[segment][2] += it->uv_bits_; + VP8IteratorBytesToNz(it); +} + +// Same as CodeResiduals, but doesn't actually write anything. +// Instead, it just records the event distribution. +static void RecordResiduals(VP8EncIterator* const it, + const VP8ModeScore* const rd) { + int x, y, ch; + VP8Residual res; + VP8Encoder* const enc = it->enc_; + + VP8IteratorNzToBytes(it); + + if (it->mb_->type_ == 1) { // i16x16 + InitResidual(0, 1, enc, &res); + SetResidualCoeffs(rd->y_dc_levels, &res); + it->top_nz_[8] = it->left_nz_[8] = + RecordCoeffs(it->top_nz_[8] + it->left_nz_[8], &res); + InitResidual(1, 0, enc, &res); + } else { + InitResidual(0, 3, enc, &res); + } + + // luma-AC + for (y = 0; y < 4; ++y) { + for (x = 0; x < 4; ++x) { + const int ctx = it->top_nz_[x] + it->left_nz_[y]; + SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + it->top_nz_[x] = it->left_nz_[y] = RecordCoeffs(ctx, &res); + } + } + + // U/V + InitResidual(0, 2, enc, &res); + for (ch = 0; ch <= 2; ch += 2) { + for (y = 0; y < 2; ++y) { + for (x = 0; x < 2; ++x) { + const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; + SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); + it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = + RecordCoeffs(ctx, &res); + } + } + } + + VP8IteratorBytesToNz(it); +} + +//------------------------------------------------------------------------------ +// Token buffer + +#ifdef USE_TOKEN_BUFFER + +void VP8TBufferInit(VP8TBuffer* const b) { + b->rows_ = NULL; + b->tokens_ = NULL; + b->last_ = &b->rows_; + b->left_ = 0; + b->error_ = 0; +} + +int VP8TBufferNewPage(VP8TBuffer* const b) { + VP8Tokens* const page = b->error_ ? NULL : (VP8Tokens*)malloc(sizeof(*page)); + if (page == NULL) { + b->error_ = 1; + return 0; + } + *b->last_ = page; + b->last_ = &page->next_; + b->left_ = MAX_NUM_TOKEN; + b->tokens_ = page->tokens_; + return 1; +} + +void VP8TBufferClear(VP8TBuffer* const b) { + if (b != NULL) { + const VP8Tokens* p = b->rows_; + while (p != NULL) { + const VP8Tokens* const next = p->next_; + free((void*)p); + p = next; + } + VP8TBufferInit(b); + } +} + +int VP8EmitTokens(const VP8TBuffer* const b, VP8BitWriter* const bw, + const uint8_t* const probas) { + VP8Tokens* p = b->rows_; + if (b->error_) return 0; + while (p != NULL) { + const int N = (p->next_ == NULL) ? b->left_ : 0; + int n = MAX_NUM_TOKEN; + while (n-- > N) { + VP8PutBit(bw, (p->tokens_[n] >> 15) & 1, probas[p->tokens_[n] & 0x7fff]); + } + p = p->next_; + } + return 1; +} + +#define TOKEN_ID(b, ctx, p) ((p) + NUM_PROBAS * ((ctx) + (b) * NUM_CTX)) + +static int RecordCoeffTokens(int ctx, const VP8Residual* const res, + VP8TBuffer* tokens) { + int n = res->first; + int b = VP8EncBands[n]; + if (!VP8AddToken(tokens, res->last >= 0, TOKEN_ID(b, ctx, 0))) { + return 0; + } + + while (n < 16) { + const int c = res->coeffs[n++]; + const int sign = c < 0; + int v = sign ? -c : c; + const int base_id = TOKEN_ID(b, ctx, 0); + if (!VP8AddToken(tokens, v != 0, base_id + 1)) { + b = VP8EncBands[n]; + ctx = 0; + continue; + } + if (!VP8AddToken(tokens, v > 1, base_id + 2)) { + b = VP8EncBands[n]; + ctx = 1; + } else { + if (!VP8AddToken(tokens, v > 4, base_id + 3)) { + if (VP8AddToken(tokens, v != 2, base_id + 4)) + VP8AddToken(tokens, v == 4, base_id + 5); + } else if (!VP8AddToken(tokens, v > 10, base_id + 6)) { + if (!VP8AddToken(tokens, v > 6, base_id + 7)) { +// VP8AddToken(tokens, v == 6, 159); + } else { +// VP8AddToken(tokens, v >= 9, 165); +// VP8AddToken(tokens, !(v & 1), 145); + } + } else { + int mask; + const uint8_t* tab; + if (v < 3 + (8 << 1)) { // kCat3 (3b) + VP8AddToken(tokens, 0, base_id + 8); + VP8AddToken(tokens, 0, base_id + 9); + v -= 3 + (8 << 0); + mask = 1 << 2; + tab = kCat3; + } else if (v < 3 + (8 << 2)) { // kCat4 (4b) + VP8AddToken(tokens, 0, base_id + 8); + VP8AddToken(tokens, 1, base_id + 9); + v -= 3 + (8 << 1); + mask = 1 << 3; + tab = kCat4; + } else if (v < 3 + (8 << 3)) { // kCat5 (5b) + VP8AddToken(tokens, 1, base_id + 8); + VP8AddToken(tokens, 0, base_id + 10); + v -= 3 + (8 << 2); + mask = 1 << 4; + tab = kCat5; + } else { // kCat6 (11b) + VP8AddToken(tokens, 1, base_id + 8); + VP8AddToken(tokens, 1, base_id + 10); + v -= 3 + (8 << 3); + mask = 1 << 10; + tab = kCat6; + } + while (mask) { + // VP8AddToken(tokens, !!(v & mask), *tab++); + mask >>= 1; + } + } + ctx = 2; + } + b = VP8EncBands[n]; + // VP8PutBitUniform(bw, sign); + if (n == 16 || !VP8AddToken(tokens, n <= res->last, TOKEN_ID(b, ctx, 0))) { + return 1; // EOB + } + } + return 1; +} + +static void RecordTokens(VP8EncIterator* const it, + const VP8ModeScore* const rd, VP8TBuffer tokens[2]) { + int x, y, ch; + VP8Residual res; + VP8Encoder* const enc = it->enc_; + + VP8IteratorNzToBytes(it); + if (it->mb_->type_ == 1) { // i16x16 + InitResidual(0, 1, enc, &res); + SetResidualCoeffs(rd->y_dc_levels, &res); +// TODO(skal): FIX -> it->top_nz_[8] = it->left_nz_[8] = + RecordCoeffTokens(it->top_nz_[8] + it->left_nz_[8], &res, &tokens[0]); + InitResidual(1, 0, enc, &res); + } else { + InitResidual(0, 3, enc, &res); + } + + // luma-AC + for (y = 0; y < 4; ++y) { + for (x = 0; x < 4; ++x) { + const int ctx = it->top_nz_[x] + it->left_nz_[y]; + SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + it->top_nz_[x] = it->left_nz_[y] = + RecordCoeffTokens(ctx, &res, &tokens[0]); + } + } + + // U/V + InitResidual(0, 2, enc, &res); + for (ch = 0; ch <= 2; ch += 2) { + for (y = 0; y < 2; ++y) { + for (x = 0; x < 2; ++x) { + const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; + SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); + it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = + RecordCoeffTokens(ctx, &res, &tokens[1]); + } + } + } +} + +#endif // USE_TOKEN_BUFFER + +//------------------------------------------------------------------------------ +// ExtraInfo map / Debug function + +#if SEGMENT_VISU +static void SetBlock(uint8_t* p, int value, int size) { + int y; + for (y = 0; y < size; ++y) { + memset(p, value, size); + p += BPS; + } +} +#endif + +static void ResetSSE(VP8Encoder* const enc) { + memset(enc->sse_, 0, sizeof(enc->sse_)); + enc->sse_count_ = 0; +} + +static void StoreSSE(const VP8EncIterator* const it) { + VP8Encoder* const enc = it->enc_; + const uint8_t* const in = it->yuv_in_; + const uint8_t* const out = it->yuv_out_; + // Note: not totally accurate at boundary. And doesn't include in-loop filter. + enc->sse_[0] += VP8SSE16x16(in + Y_OFF, out + Y_OFF); + enc->sse_[1] += VP8SSE8x8(in + U_OFF, out + U_OFF); + enc->sse_[2] += VP8SSE8x8(in + V_OFF, out + V_OFF); + enc->sse_count_ += 16 * 16; +} + +static void StoreSideInfo(const VP8EncIterator* const it) { + VP8Encoder* const enc = it->enc_; + const VP8MBInfo* const mb = it->mb_; + WebPPicture* const pic = enc->pic_; + + if (pic->stats != NULL) { + StoreSSE(it); + enc->block_count_[0] += (mb->type_ == 0); + enc->block_count_[1] += (mb->type_ == 1); + enc->block_count_[2] += (mb->skip_ != 0); + } + + if (pic->extra_info != NULL) { + uint8_t* const info = &pic->extra_info[it->x_ + it->y_ * enc->mb_w_]; + switch (pic->extra_info_type) { + case 1: *info = mb->type_; break; + case 2: *info = mb->segment_; break; + case 3: *info = enc->dqm_[mb->segment_].quant_; break; + case 4: *info = (mb->type_ == 1) ? it->preds_[0] : 0xff; break; + case 5: *info = mb->uv_mode_; break; + case 6: { + const int b = (int)((it->luma_bits_ + it->uv_bits_ + 7) >> 3); + *info = (b > 255) ? 255 : b; break; + } + default: *info = 0; break; + }; + } +#if SEGMENT_VISU // visualize segments and prediction modes + SetBlock(it->yuv_out_ + Y_OFF, mb->segment_ * 64, 16); + SetBlock(it->yuv_out_ + U_OFF, it->preds_[0] * 64, 8); + SetBlock(it->yuv_out_ + V_OFF, mb->uv_mode_ * 64, 8); +#endif +} + +//------------------------------------------------------------------------------ +// Main loops +// +// VP8EncLoop(): does the final bitstream coding. + +static void ResetAfterSkip(VP8EncIterator* const it) { + if (it->mb_->type_ == 1) { + *it->nz_ = 0; // reset all predictors + it->left_nz_[8] = 0; + } else { + *it->nz_ &= (1 << 24); // preserve the dc_nz bit + } +} + +int VP8EncLoop(VP8Encoder* const enc) { + int i, s, p; + int ok = 1; + VP8EncIterator it; + VP8ModeScore info; + const int dont_use_skip = !enc->proba_.use_skip_proba_; + const int rd_opt = enc->rd_opt_level_; + const int kAverageBytesPerMB = 5; // TODO: have a kTable[quality/10] + const int bytes_per_parts = + enc->mb_w_ * enc->mb_h_ * kAverageBytesPerMB / enc->num_parts_; + + // Initialize the bit-writers + for (p = 0; p < enc->num_parts_; ++p) { + VP8BitWriterInit(enc->parts_ + p, bytes_per_parts); + } + + ResetStats(enc); + ResetSSE(enc); + + VP8IteratorInit(enc, &it); + VP8InitFilter(&it); + do { + VP8IteratorImport(&it); + // Warning! order is important: first call VP8Decimate() and + // *then* decide how to code the skip decision if there's one. + if (!VP8Decimate(&it, &info, rd_opt) || dont_use_skip) { + CodeResiduals(it.bw_, &it, &info); + } else { // reset predictors after a skip + ResetAfterSkip(&it); + } +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (enc->use_layer_) { + VP8EncCodeLayerBlock(&it); + } +#endif + StoreSideInfo(&it); + VP8StoreFilterStats(&it); + VP8IteratorExport(&it); + ok = VP8IteratorProgress(&it, 20); + } while (ok && VP8IteratorNext(&it, it.yuv_out_)); + + if (ok) { // Finalize the partitions, check for extra errors. + for (p = 0; p < enc->num_parts_; ++p) { + VP8BitWriterFinish(enc->parts_ + p); + ok &= !enc->parts_[p].error_; + } + } + + if (ok) { // All good. Finish up. + if (enc->pic_->stats) { // finalize byte counters... + for (i = 0; i <= 2; ++i) { + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + enc->residual_bytes_[i][s] = (int)((it.bit_count_[s][i] + 7) >> 3); + } + } + } + VP8AdjustFilterStrength(&it); // ...and store filter stats. + } else { + // Something bad happened -> need to do some memory cleanup. + VP8EncFreeBitWriters(enc); + } + + return ok; +} + +//------------------------------------------------------------------------------ +// VP8StatLoop(): only collect statistics (number of skips, token usage, ...) +// This is used for deciding optimal probabilities. It also +// modifies the quantizer value if some target (size, PNSR) +// was specified. + +#define kHeaderSizeEstimate (15 + 20 + 10) // TODO: fix better + +static int OneStatPass(VP8Encoder* const enc, float q, int rd_opt, int nb_mbs, + float* const PSNR, int percent_delta) { + VP8EncIterator it; + uint64_t size = 0; + uint64_t distortion = 0; + const uint64_t pixel_count = nb_mbs * 384; + + // Make sure the quality parameter is inside valid bounds + if (q < 0.) { + q = 0; + } else if (q > 100.) { + q = 100; + } + + VP8SetSegmentParams(enc, q); // setup segment quantizations and filters + + ResetStats(enc); + ResetTokenStats(enc); + + VP8IteratorInit(enc, &it); + do { + VP8ModeScore info; + VP8IteratorImport(&it); + if (VP8Decimate(&it, &info, rd_opt)) { + // Just record the number of skips and act like skip_proba is not used. + enc->proba_.nb_skip_++; + } + RecordResiduals(&it, &info); + size += info.R; + distortion += info.D; + if (percent_delta && !VP8IteratorProgress(&it, percent_delta)) + return 0; + } while (VP8IteratorNext(&it, it.yuv_out_) && --nb_mbs > 0); + size += FinalizeSkipProba(enc); + size += FinalizeTokenProbas(enc); + size += enc->segment_hdr_.size_; + size = ((size + 1024) >> 11) + kHeaderSizeEstimate; + + if (PSNR) { + *PSNR = (float)(10.* log10(255. * 255. * pixel_count / distortion)); + } + return (int)size; +} + +// successive refinement increments. +static const int dqs[] = { 20, 15, 10, 8, 6, 4, 2, 1, 0 }; + +int VP8StatLoop(VP8Encoder* const enc) { + const int do_search = + (enc->config_->target_size > 0 || enc->config_->target_PSNR > 0); + const int fast_probe = (enc->method_ < 2 && !do_search); + float q = enc->config_->quality; + const int max_passes = enc->config_->pass; + const int task_percent = 20; + const int percent_per_pass = (task_percent + max_passes / 2) / max_passes; + const int final_percent = enc->percent_ + task_percent; + int pass; + int nb_mbs; + + // Fast mode: quick analysis pass over few mbs. Better than nothing. + nb_mbs = enc->mb_w_ * enc->mb_h_; + if (fast_probe && nb_mbs > 100) nb_mbs = 100; + + // No target size: just do several pass without changing 'q' + if (!do_search) { + for (pass = 0; pass < max_passes; ++pass) { + const int rd_opt = (enc->method_ > 2); + if (!OneStatPass(enc, q, rd_opt, nb_mbs, NULL, percent_per_pass)) { + return 0; + } + } + } else { + // binary search for a size close to target + for (pass = 0; pass < max_passes && (dqs[pass] > 0); ++pass) { + const int rd_opt = 1; + float PSNR; + int criterion; + const int size = OneStatPass(enc, q, rd_opt, nb_mbs, &PSNR, + percent_per_pass); +#if DEBUG_SEARCH + printf("#%d size=%d PSNR=%.2f q=%.2f\n", pass, size, PSNR, q); +#endif + if (!size) return 0; + if (enc->config_->target_PSNR > 0) { + criterion = (PSNR < enc->config_->target_PSNR); + } else { + criterion = (size < enc->config_->target_size); + } + // dichotomize + if (criterion) { + q += dqs[pass]; + } else { + q -= dqs[pass]; + } + } + } + return WebPReportProgress(enc->pic_, final_percent, &enc->percent_); +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/histogram.c b/drivers/webpold/enc/histogram.c new file mode 100644 index 0000000000..ca838e064d --- /dev/null +++ b/drivers/webpold/enc/histogram.c @@ -0,0 +1,406 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Author: Jyrki Alakuijala (jyrki@google.com) +// +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <math.h> +#include <stdio.h> + +#include "./backward_references.h" +#include "./histogram.h" +#include "../dsp/lossless.h" +#include "../utils/utils.h" + +static void HistogramClear(VP8LHistogram* const p) { + memset(p->literal_, 0, sizeof(p->literal_)); + memset(p->red_, 0, sizeof(p->red_)); + memset(p->blue_, 0, sizeof(p->blue_)); + memset(p->alpha_, 0, sizeof(p->alpha_)); + memset(p->distance_, 0, sizeof(p->distance_)); + p->bit_cost_ = 0; +} + +void VP8LHistogramStoreRefs(const VP8LBackwardRefs* const refs, + VP8LHistogram* const histo) { + int i; + for (i = 0; i < refs->size; ++i) { + VP8LHistogramAddSinglePixOrCopy(histo, &refs->refs[i]); + } +} + +void VP8LHistogramCreate(VP8LHistogram* const p, + const VP8LBackwardRefs* const refs, + int palette_code_bits) { + if (palette_code_bits >= 0) { + p->palette_code_bits_ = palette_code_bits; + } + HistogramClear(p); + VP8LHistogramStoreRefs(refs, p); +} + +void VP8LHistogramInit(VP8LHistogram* const p, int palette_code_bits) { + p->palette_code_bits_ = palette_code_bits; + HistogramClear(p); +} + +VP8LHistogramSet* VP8LAllocateHistogramSet(int size, int cache_bits) { + int i; + VP8LHistogramSet* set; + VP8LHistogram* bulk; + const uint64_t total_size = (uint64_t)sizeof(*set) + + size * sizeof(*set->histograms) + + size * sizeof(**set->histograms); + uint8_t* memory = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*memory)); + if (memory == NULL) return NULL; + + set = (VP8LHistogramSet*)memory; + memory += sizeof(*set); + set->histograms = (VP8LHistogram**)memory; + memory += size * sizeof(*set->histograms); + bulk = (VP8LHistogram*)memory; + set->max_size = size; + set->size = size; + for (i = 0; i < size; ++i) { + set->histograms[i] = bulk + i; + VP8LHistogramInit(set->histograms[i], cache_bits); + } + return set; +} + +// ----------------------------------------------------------------------------- + +void VP8LHistogramAddSinglePixOrCopy(VP8LHistogram* const histo, + const PixOrCopy* const v) { + if (PixOrCopyIsLiteral(v)) { + ++histo->alpha_[PixOrCopyLiteral(v, 3)]; + ++histo->red_[PixOrCopyLiteral(v, 2)]; + ++histo->literal_[PixOrCopyLiteral(v, 1)]; + ++histo->blue_[PixOrCopyLiteral(v, 0)]; + } else if (PixOrCopyIsCacheIdx(v)) { + int literal_ix = 256 + NUM_LENGTH_CODES + PixOrCopyCacheIdx(v); + ++histo->literal_[literal_ix]; + } else { + int code, extra_bits_count, extra_bits_value; + PrefixEncode(PixOrCopyLength(v), + &code, &extra_bits_count, &extra_bits_value); + ++histo->literal_[256 + code]; + PrefixEncode(PixOrCopyDistance(v), + &code, &extra_bits_count, &extra_bits_value); + ++histo->distance_[code]; + } +} + + + +static double BitsEntropy(const int* const array, int n) { + double retval = 0.; + int sum = 0; + int nonzeros = 0; + int max_val = 0; + int i; + double mix; + for (i = 0; i < n; ++i) { + if (array[i] != 0) { + sum += array[i]; + ++nonzeros; + retval -= VP8LFastSLog2(array[i]); + if (max_val < array[i]) { + max_val = array[i]; + } + } + } + retval += VP8LFastSLog2(sum); + + if (nonzeros < 5) { + if (nonzeros <= 1) { + return 0; + } + // Two symbols, they will be 0 and 1 in a Huffman code. + // Let's mix in a bit of entropy to favor good clustering when + // distributions of these are combined. + if (nonzeros == 2) { + return 0.99 * sum + 0.01 * retval; + } + // No matter what the entropy says, we cannot be better than min_limit + // with Huffman coding. I am mixing a bit of entropy into the + // min_limit since it produces much better (~0.5 %) compression results + // perhaps because of better entropy clustering. + if (nonzeros == 3) { + mix = 0.95; + } else { + mix = 0.7; // nonzeros == 4. + } + } else { + mix = 0.627; + } + + { + double min_limit = 2 * sum - max_val; + min_limit = mix * min_limit + (1.0 - mix) * retval; + return (retval < min_limit) ? min_limit : retval; + } +} + +double VP8LHistogramEstimateBitsBulk(const VP8LHistogram* const p) { + double retval = BitsEntropy(&p->literal_[0], VP8LHistogramNumCodes(p)) + + BitsEntropy(&p->red_[0], 256) + + BitsEntropy(&p->blue_[0], 256) + + BitsEntropy(&p->alpha_[0], 256) + + BitsEntropy(&p->distance_[0], NUM_DISTANCE_CODES); + // Compute the extra bits cost. + int i; + for (i = 2; i < NUM_LENGTH_CODES - 2; ++i) { + retval += + (i >> 1) * p->literal_[256 + i + 2]; + } + for (i = 2; i < NUM_DISTANCE_CODES - 2; ++i) { + retval += (i >> 1) * p->distance_[i + 2]; + } + return retval; +} + + +// Returns the cost encode the rle-encoded entropy code. +// The constants in this function are experimental. +static double HuffmanCost(const int* const population, int length) { + // Small bias because Huffman code length is typically not stored in + // full length. + static const int kHuffmanCodeOfHuffmanCodeSize = CODE_LENGTH_CODES * 3; + static const double kSmallBias = 9.1; + double retval = kHuffmanCodeOfHuffmanCodeSize - kSmallBias; + int streak = 0; + int i = 0; + for (; i < length - 1; ++i) { + ++streak; + if (population[i] == population[i + 1]) { + continue; + } + last_streak_hack: + // population[i] points now to the symbol in the streak of same values. + if (streak > 3) { + if (population[i] == 0) { + retval += 1.5625 + 0.234375 * streak; + } else { + retval += 2.578125 + 0.703125 * streak; + } + } else { + if (population[i] == 0) { + retval += 1.796875 * streak; + } else { + retval += 3.28125 * streak; + } + } + streak = 0; + } + if (i == length - 1) { + ++streak; + goto last_streak_hack; + } + return retval; +} + +// Estimates the Huffman dictionary + other block overhead size. +static double HistogramEstimateBitsHeader(const VP8LHistogram* const p) { + return HuffmanCost(&p->alpha_[0], 256) + + HuffmanCost(&p->red_[0], 256) + + HuffmanCost(&p->literal_[0], VP8LHistogramNumCodes(p)) + + HuffmanCost(&p->blue_[0], 256) + + HuffmanCost(&p->distance_[0], NUM_DISTANCE_CODES); +} + +double VP8LHistogramEstimateBits(const VP8LHistogram* const p) { + return HistogramEstimateBitsHeader(p) + VP8LHistogramEstimateBitsBulk(p); +} + +static void HistogramBuildImage(int xsize, int histo_bits, + const VP8LBackwardRefs* const backward_refs, + VP8LHistogramSet* const image) { + int i; + int x = 0, y = 0; + const int histo_xsize = VP8LSubSampleSize(xsize, histo_bits); + VP8LHistogram** const histograms = image->histograms; + assert(histo_bits > 0); + for (i = 0; i < backward_refs->size; ++i) { + const PixOrCopy* const v = &backward_refs->refs[i]; + const int ix = (y >> histo_bits) * histo_xsize + (x >> histo_bits); + VP8LHistogramAddSinglePixOrCopy(histograms[ix], v); + x += PixOrCopyLength(v); + while (x >= xsize) { + x -= xsize; + ++y; + } + } +} + +static uint32_t MyRand(uint32_t *seed) { + *seed *= 16807U; + if (*seed == 0) { + *seed = 1; + } + return *seed; +} + +static int HistogramCombine(const VP8LHistogramSet* const in, + VP8LHistogramSet* const out, int num_pairs) { + int ok = 0; + int i, iter; + uint32_t seed = 0; + int tries_with_no_success = 0; + const int min_cluster_size = 2; + int out_size = in->size; + const int outer_iters = in->size * 3; + VP8LHistogram* const histos = (VP8LHistogram*)malloc(2 * sizeof(*histos)); + VP8LHistogram* cur_combo = histos + 0; // trial merged histogram + VP8LHistogram* best_combo = histos + 1; // best merged histogram so far + if (histos == NULL) goto End; + + // Copy histograms from in[] to out[]. + assert(in->size <= out->size); + for (i = 0; i < in->size; ++i) { + in->histograms[i]->bit_cost_ = VP8LHistogramEstimateBits(in->histograms[i]); + *out->histograms[i] = *in->histograms[i]; + } + + // Collapse similar histograms in 'out'. + for (iter = 0; iter < outer_iters && out_size >= min_cluster_size; ++iter) { + // We pick the best pair to be combined out of 'inner_iters' pairs. + double best_cost_diff = 0.; + int best_idx1 = 0, best_idx2 = 1; + int j; + seed += iter; + for (j = 0; j < num_pairs; ++j) { + double curr_cost_diff; + // Choose two histograms at random and try to combine them. + const uint32_t idx1 = MyRand(&seed) % out_size; + const uint32_t tmp = ((j & 7) + 1) % (out_size - 1); + const uint32_t diff = (tmp < 3) ? tmp : MyRand(&seed) % (out_size - 1); + const uint32_t idx2 = (idx1 + diff + 1) % out_size; + if (idx1 == idx2) { + continue; + } + *cur_combo = *out->histograms[idx1]; + VP8LHistogramAdd(cur_combo, out->histograms[idx2]); + cur_combo->bit_cost_ = VP8LHistogramEstimateBits(cur_combo); + // Calculate cost reduction on combining. + curr_cost_diff = cur_combo->bit_cost_ + - out->histograms[idx1]->bit_cost_ + - out->histograms[idx2]->bit_cost_; + if (best_cost_diff > curr_cost_diff) { // found a better pair? + { // swap cur/best combo histograms + VP8LHistogram* const tmp_histo = cur_combo; + cur_combo = best_combo; + best_combo = tmp_histo; + } + best_cost_diff = curr_cost_diff; + best_idx1 = idx1; + best_idx2 = idx2; + } + } + + if (best_cost_diff < 0.0) { + *out->histograms[best_idx1] = *best_combo; + // swap best_idx2 slot with last one (which is now unused) + --out_size; + if (best_idx2 != out_size) { + out->histograms[best_idx2] = out->histograms[out_size]; + out->histograms[out_size] = NULL; // just for sanity check. + } + tries_with_no_success = 0; + } + if (++tries_with_no_success >= 50) { + break; + } + } + out->size = out_size; + ok = 1; + + End: + free(histos); + return ok; +} + +// ----------------------------------------------------------------------------- +// Histogram refinement + +// What is the bit cost of moving square_histogram from +// cur_symbol to candidate_symbol. +// TODO(skal): we don't really need to copy the histogram and Add(). Instead +// we just need VP8LDualHistogramEstimateBits(A, B) estimation function. +static double HistogramDistance(const VP8LHistogram* const square_histogram, + const VP8LHistogram* const candidate) { + const double previous_bit_cost = candidate->bit_cost_; + double new_bit_cost; + VP8LHistogram modified_histo; + modified_histo = *candidate; + VP8LHistogramAdd(&modified_histo, square_histogram); + new_bit_cost = VP8LHistogramEstimateBits(&modified_histo); + + return new_bit_cost - previous_bit_cost; +} + +// Find the best 'out' histogram for each of the 'in' histograms. +// Note: we assume that out[]->bit_cost_ is already up-to-date. +static void HistogramRemap(const VP8LHistogramSet* const in, + const VP8LHistogramSet* const out, + uint16_t* const symbols) { + int i; + for (i = 0; i < in->size; ++i) { + int best_out = 0; + double best_bits = HistogramDistance(in->histograms[i], out->histograms[0]); + int k; + for (k = 1; k < out->size; ++k) { + const double cur_bits = + HistogramDistance(in->histograms[i], out->histograms[k]); + if (cur_bits < best_bits) { + best_bits = cur_bits; + best_out = k; + } + } + symbols[i] = best_out; + } + + // Recompute each out based on raw and symbols. + for (i = 0; i < out->size; ++i) { + HistogramClear(out->histograms[i]); + } + for (i = 0; i < in->size; ++i) { + VP8LHistogramAdd(out->histograms[symbols[i]], in->histograms[i]); + } +} + +int VP8LGetHistoImageSymbols(int xsize, int ysize, + const VP8LBackwardRefs* const refs, + int quality, int histo_bits, int cache_bits, + VP8LHistogramSet* const image_in, + uint16_t* const histogram_symbols) { + int ok = 0; + const int histo_xsize = histo_bits ? VP8LSubSampleSize(xsize, histo_bits) : 1; + const int histo_ysize = histo_bits ? VP8LSubSampleSize(ysize, histo_bits) : 1; + const int num_histo_pairs = 10 + quality / 2; // For HistogramCombine(). + const int histo_image_raw_size = histo_xsize * histo_ysize; + VP8LHistogramSet* const image_out = + VP8LAllocateHistogramSet(histo_image_raw_size, cache_bits); + if (image_out == NULL) return 0; + + // Build histogram image. + HistogramBuildImage(xsize, histo_bits, refs, image_out); + // Collapse similar histograms. + if (!HistogramCombine(image_out, image_in, num_histo_pairs)) { + goto Error; + } + // Find the optimal map from original histograms to the final ones. + HistogramRemap(image_out, image_in, histogram_symbols); + ok = 1; + +Error: + free(image_out); + return ok; +} diff --git a/drivers/webpold/enc/histogram.h b/drivers/webpold/enc/histogram.h new file mode 100644 index 0000000000..5b5de25539 --- /dev/null +++ b/drivers/webpold/enc/histogram.h @@ -0,0 +1,115 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Author: Jyrki Alakuijala (jyrki@google.com) +// +// Models the histograms of literal and distance codes. + +#ifndef WEBP_ENC_HISTOGRAM_H_ +#define WEBP_ENC_HISTOGRAM_H_ + +#include <assert.h> +#include <stddef.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "./backward_references.h" +#include "../format_constants.h" +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// A simple container for histograms of data. +typedef struct { + // literal_ contains green literal, palette-code and + // copy-length-prefix histogram + int literal_[PIX_OR_COPY_CODES_MAX]; + int red_[256]; + int blue_[256]; + int alpha_[256]; + // Backward reference prefix-code histogram. + int distance_[NUM_DISTANCE_CODES]; + int palette_code_bits_; + double bit_cost_; // cached value of VP8LHistogramEstimateBits(this) +} VP8LHistogram; + +// Collection of histograms with fixed capacity, allocated as one +// big memory chunk. Can be destroyed by simply calling 'free()'. +typedef struct { + int size; // number of slots currently in use + int max_size; // maximum capacity + VP8LHistogram** histograms; +} VP8LHistogramSet; + +// Create the histogram. +// +// The input data is the PixOrCopy data, which models the literals, stop +// codes and backward references (both distances and lengths). Also: if +// palette_code_bits is >= 0, initialize the histogram with this value. +void VP8LHistogramCreate(VP8LHistogram* const p, + const VP8LBackwardRefs* const refs, + int palette_code_bits); + +// Set the palette_code_bits and reset the stats. +void VP8LHistogramInit(VP8LHistogram* const p, int palette_code_bits); + +// Collect all the references into a histogram (without reset) +void VP8LHistogramStoreRefs(const VP8LBackwardRefs* const refs, + VP8LHistogram* const histo); + +// Allocate an array of pointer to histograms, allocated and initialized +// using 'cache_bits'. Return NULL in case of memory error. +VP8LHistogramSet* VP8LAllocateHistogramSet(int size, int cache_bits); + +// Accumulate a token 'v' into a histogram. +void VP8LHistogramAddSinglePixOrCopy(VP8LHistogram* const histo, + const PixOrCopy* const v); + +// Estimate how many bits the combined entropy of literals and distance +// approximately maps to. +double VP8LHistogramEstimateBits(const VP8LHistogram* const p); + +// This function estimates the cost in bits excluding the bits needed to +// represent the entropy code itself. +double VP8LHistogramEstimateBitsBulk(const VP8LHistogram* const p); + +static WEBP_INLINE void VP8LHistogramAdd(VP8LHistogram* const p, + const VP8LHistogram* const a) { + int i; + for (i = 0; i < PIX_OR_COPY_CODES_MAX; ++i) { + p->literal_[i] += a->literal_[i]; + } + for (i = 0; i < NUM_DISTANCE_CODES; ++i) { + p->distance_[i] += a->distance_[i]; + } + for (i = 0; i < 256; ++i) { + p->red_[i] += a->red_[i]; + p->blue_[i] += a->blue_[i]; + p->alpha_[i] += a->alpha_[i]; + } +} + +static WEBP_INLINE int VP8LHistogramNumCodes(const VP8LHistogram* const p) { + return 256 + NUM_LENGTH_CODES + + ((p->palette_code_bits_ > 0) ? (1 << p->palette_code_bits_) : 0); +} + +// Builds the histogram image. +int VP8LGetHistoImageSymbols(int xsize, int ysize, + const VP8LBackwardRefs* const refs, + int quality, int histogram_bits, int cache_bits, + VP8LHistogramSet* const image_in, + uint16_t* const histogram_symbols); + +#if defined(__cplusplus) || defined(c_plusplus) +} +#endif + +#endif // WEBP_ENC_HISTOGRAM_H_ diff --git a/drivers/webpold/enc/iterator.c b/drivers/webpold/enc/iterator.c new file mode 100644 index 0000000000..86e473bcf0 --- /dev/null +++ b/drivers/webpold/enc/iterator.c @@ -0,0 +1,422 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// VP8Iterator: block iterator +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <string.h> + +#include "./vp8enci.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// VP8Iterator +//------------------------------------------------------------------------------ + +static void InitLeft(VP8EncIterator* const it) { + const VP8Encoder* const enc = it->enc_; + enc->y_left_[-1] = enc->u_left_[-1] = enc->v_left_[-1] = + (it->y_ > 0) ? 129 : 127; + memset(enc->y_left_, 129, 16); + memset(enc->u_left_, 129, 8); + memset(enc->v_left_, 129, 8); + it->left_nz_[8] = 0; +} + +static void InitTop(VP8EncIterator* const it) { + const VP8Encoder* const enc = it->enc_; + const size_t top_size = enc->mb_w_ * 16; + memset(enc->y_top_, 127, 2 * top_size); + memset(enc->nz_, 0, enc->mb_w_ * sizeof(*enc->nz_)); +} + +void VP8IteratorReset(VP8EncIterator* const it) { + VP8Encoder* const enc = it->enc_; + it->x_ = 0; + it->y_ = 0; + it->y_offset_ = 0; + it->uv_offset_ = 0; + it->mb_ = enc->mb_info_; + it->preds_ = enc->preds_; + it->nz_ = enc->nz_; + it->bw_ = &enc->parts_[0]; + it->done_ = enc->mb_w_* enc->mb_h_; + InitTop(it); + InitLeft(it); + memset(it->bit_count_, 0, sizeof(it->bit_count_)); + it->do_trellis_ = 0; +} + +void VP8IteratorInit(VP8Encoder* const enc, VP8EncIterator* const it) { + it->enc_ = enc; + it->y_stride_ = enc->pic_->y_stride; + it->uv_stride_ = enc->pic_->uv_stride; + // TODO(later): for multithreading, these should be owned by 'it'. + it->yuv_in_ = enc->yuv_in_; + it->yuv_out_ = enc->yuv_out_; + it->yuv_out2_ = enc->yuv_out2_; + it->yuv_p_ = enc->yuv_p_; + it->lf_stats_ = enc->lf_stats_; + it->percent0_ = enc->percent_; + VP8IteratorReset(it); +} + +int VP8IteratorProgress(const VP8EncIterator* const it, int delta) { + VP8Encoder* const enc = it->enc_; + if (delta && enc->pic_->progress_hook) { + const int percent = (enc->mb_h_ <= 1) + ? it->percent0_ + : it->percent0_ + delta * it->y_ / (enc->mb_h_ - 1); + return WebPReportProgress(enc->pic_, percent, &enc->percent_); + } + return 1; +} + +//------------------------------------------------------------------------------ +// Import the source samples into the cache. Takes care of replicating +// boundary pixels if necessary. + +static void ImportBlock(const uint8_t* src, int src_stride, + uint8_t* dst, int w, int h, int size) { + int i; + for (i = 0; i < h; ++i) { + memcpy(dst, src, w); + if (w < size) { + memset(dst + w, dst[w - 1], size - w); + } + dst += BPS; + src += src_stride; + } + for (i = h; i < size; ++i) { + memcpy(dst, dst - BPS, size); + dst += BPS; + } +} + +void VP8IteratorImport(const VP8EncIterator* const it) { + const VP8Encoder* const enc = it->enc_; + const int x = it->x_, y = it->y_; + const WebPPicture* const pic = enc->pic_; + const uint8_t* const ysrc = pic->y + (y * pic->y_stride + x) * 16; + const uint8_t* const usrc = pic->u + (y * pic->uv_stride + x) * 8; + const uint8_t* const vsrc = pic->v + (y * pic->uv_stride + x) * 8; + uint8_t* const ydst = it->yuv_in_ + Y_OFF; + uint8_t* const udst = it->yuv_in_ + U_OFF; + uint8_t* const vdst = it->yuv_in_ + V_OFF; + int w = (pic->width - x * 16); + int h = (pic->height - y * 16); + + if (w > 16) w = 16; + if (h > 16) h = 16; + + // Luma plane + ImportBlock(ysrc, pic->y_stride, ydst, w, h, 16); + + { // U/V planes + const int uv_w = (w + 1) >> 1; + const int uv_h = (h + 1) >> 1; + ImportBlock(usrc, pic->uv_stride, udst, uv_w, uv_h, 8); + ImportBlock(vsrc, pic->uv_stride, vdst, uv_w, uv_h, 8); + } +} + +//------------------------------------------------------------------------------ +// Copy back the compressed samples into user space if requested. + +static void ExportBlock(const uint8_t* src, uint8_t* dst, int dst_stride, + int w, int h) { + while (h-- > 0) { + memcpy(dst, src, w); + dst += dst_stride; + src += BPS; + } +} + +void VP8IteratorExport(const VP8EncIterator* const it) { + const VP8Encoder* const enc = it->enc_; + if (enc->config_->show_compressed) { + const int x = it->x_, y = it->y_; + const uint8_t* const ysrc = it->yuv_out_ + Y_OFF; + const uint8_t* const usrc = it->yuv_out_ + U_OFF; + const uint8_t* const vsrc = it->yuv_out_ + V_OFF; + const WebPPicture* const pic = enc->pic_; + uint8_t* const ydst = pic->y + (y * pic->y_stride + x) * 16; + uint8_t* const udst = pic->u + (y * pic->uv_stride + x) * 8; + uint8_t* const vdst = pic->v + (y * pic->uv_stride + x) * 8; + int w = (pic->width - x * 16); + int h = (pic->height - y * 16); + + if (w > 16) w = 16; + if (h > 16) h = 16; + + // Luma plane + ExportBlock(ysrc, ydst, pic->y_stride, w, h); + + { // U/V planes + const int uv_w = (w + 1) >> 1; + const int uv_h = (h + 1) >> 1; + ExportBlock(usrc, udst, pic->uv_stride, uv_w, uv_h); + ExportBlock(vsrc, vdst, pic->uv_stride, uv_w, uv_h); + } + } +} + +//------------------------------------------------------------------------------ +// Non-zero contexts setup/teardown + +// Nz bits: +// 0 1 2 3 Y +// 4 5 6 7 +// 8 9 10 11 +// 12 13 14 15 +// 16 17 U +// 18 19 +// 20 21 V +// 22 23 +// 24 DC-intra16 + +// Convert packed context to byte array +#define BIT(nz, n) (!!((nz) & (1 << (n)))) + +void VP8IteratorNzToBytes(VP8EncIterator* const it) { + const int tnz = it->nz_[0], lnz = it->nz_[-1]; + int* const top_nz = it->top_nz_; + int* const left_nz = it->left_nz_; + + // Top-Y + top_nz[0] = BIT(tnz, 12); + top_nz[1] = BIT(tnz, 13); + top_nz[2] = BIT(tnz, 14); + top_nz[3] = BIT(tnz, 15); + // Top-U + top_nz[4] = BIT(tnz, 18); + top_nz[5] = BIT(tnz, 19); + // Top-V + top_nz[6] = BIT(tnz, 22); + top_nz[7] = BIT(tnz, 23); + // DC + top_nz[8] = BIT(tnz, 24); + + // left-Y + left_nz[0] = BIT(lnz, 3); + left_nz[1] = BIT(lnz, 7); + left_nz[2] = BIT(lnz, 11); + left_nz[3] = BIT(lnz, 15); + // left-U + left_nz[4] = BIT(lnz, 17); + left_nz[5] = BIT(lnz, 19); + // left-V + left_nz[6] = BIT(lnz, 21); + left_nz[7] = BIT(lnz, 23); + // left-DC is special, iterated separately +} + +void VP8IteratorBytesToNz(VP8EncIterator* const it) { + uint32_t nz = 0; + const int* const top_nz = it->top_nz_; + const int* const left_nz = it->left_nz_; + // top + nz |= (top_nz[0] << 12) | (top_nz[1] << 13); + nz |= (top_nz[2] << 14) | (top_nz[3] << 15); + nz |= (top_nz[4] << 18) | (top_nz[5] << 19); + nz |= (top_nz[6] << 22) | (top_nz[7] << 23); + nz |= (top_nz[8] << 24); // we propagate the _top_ bit, esp. for intra4 + // left + nz |= (left_nz[0] << 3) | (left_nz[1] << 7); + nz |= (left_nz[2] << 11); + nz |= (left_nz[4] << 17) | (left_nz[6] << 21); + + *it->nz_ = nz; +} + +#undef BIT + +//------------------------------------------------------------------------------ +// Advance to the next position, doing the bookeeping. + +int VP8IteratorNext(VP8EncIterator* const it, + const uint8_t* const block_to_save) { + VP8Encoder* const enc = it->enc_; + if (block_to_save) { + const int x = it->x_, y = it->y_; + const uint8_t* const ysrc = block_to_save + Y_OFF; + const uint8_t* const usrc = block_to_save + U_OFF; + if (x < enc->mb_w_ - 1) { // left + int i; + for (i = 0; i < 16; ++i) { + enc->y_left_[i] = ysrc[15 + i * BPS]; + } + for (i = 0; i < 8; ++i) { + enc->u_left_[i] = usrc[7 + i * BPS]; + enc->v_left_[i] = usrc[15 + i * BPS]; + } + // top-left (before 'top'!) + enc->y_left_[-1] = enc->y_top_[x * 16 + 15]; + enc->u_left_[-1] = enc->uv_top_[x * 16 + 0 + 7]; + enc->v_left_[-1] = enc->uv_top_[x * 16 + 8 + 7]; + } + if (y < enc->mb_h_ - 1) { // top + memcpy(enc->y_top_ + x * 16, ysrc + 15 * BPS, 16); + memcpy(enc->uv_top_ + x * 16, usrc + 7 * BPS, 8 + 8); + } + } + + it->mb_++; + it->preds_ += 4; + it->nz_++; + it->x_++; + if (it->x_ == enc->mb_w_) { + it->x_ = 0; + it->y_++; + it->bw_ = &enc->parts_[it->y_ & (enc->num_parts_ - 1)]; + it->preds_ = enc->preds_ + it->y_ * 4 * enc->preds_w_; + it->nz_ = enc->nz_; + InitLeft(it); + } + return (0 < --it->done_); +} + +//------------------------------------------------------------------------------ +// Helper function to set mode properties + +void VP8SetIntra16Mode(const VP8EncIterator* const it, int mode) { + uint8_t* preds = it->preds_; + int y; + for (y = 0; y < 4; ++y) { + memset(preds, mode, 4); + preds += it->enc_->preds_w_; + } + it->mb_->type_ = 1; +} + +void VP8SetIntra4Mode(const VP8EncIterator* const it, const uint8_t* modes) { + uint8_t* preds = it->preds_; + int y; + for (y = 4; y > 0; --y) { + memcpy(preds, modes, 4 * sizeof(*modes)); + preds += it->enc_->preds_w_; + modes += 4; + } + it->mb_->type_ = 0; +} + +void VP8SetIntraUVMode(const VP8EncIterator* const it, int mode) { + it->mb_->uv_mode_ = mode; +} + +void VP8SetSkip(const VP8EncIterator* const it, int skip) { + it->mb_->skip_ = skip; +} + +void VP8SetSegment(const VP8EncIterator* const it, int segment) { + it->mb_->segment_ = segment; +} + +//------------------------------------------------------------------------------ +// Intra4x4 sub-blocks iteration +// +// We store and update the boundary samples into an array of 37 pixels. They +// are updated as we iterate and reconstructs each intra4x4 blocks in turn. +// The position of the samples has the following snake pattern: +// +// 16|17 18 19 20|21 22 23 24|25 26 27 28|29 30 31 32|33 34 35 36 <- Top-right +// --+-----------+-----------+-----------+-----------+ +// 15| 19| 23| 27| 31| +// 14| 18| 22| 26| 30| +// 13| 17| 21| 25| 29| +// 12|13 14 15 16|17 18 19 20|21 22 23 24|25 26 27 28| +// --+-----------+-----------+-----------+-----------+ +// 11| 15| 19| 23| 27| +// 10| 14| 18| 22| 26| +// 9| 13| 17| 21| 25| +// 8| 9 10 11 12|13 14 15 16|17 18 19 20|21 22 23 24| +// --+-----------+-----------+-----------+-----------+ +// 7| 11| 15| 19| 23| +// 6| 10| 14| 18| 22| +// 5| 9| 13| 17| 21| +// 4| 5 6 7 8| 9 10 11 12|13 14 15 16|17 18 19 20| +// --+-----------+-----------+-----------+-----------+ +// 3| 7| 11| 15| 19| +// 2| 6| 10| 14| 18| +// 1| 5| 9| 13| 17| +// 0| 1 2 3 4| 5 6 7 8| 9 10 11 12|13 14 15 16| +// --+-----------+-----------+-----------+-----------+ + +// Array to record the position of the top sample to pass to the prediction +// functions in dsp.c. +static const uint8_t VP8TopLeftI4[16] = { + 17, 21, 25, 29, + 13, 17, 21, 25, + 9, 13, 17, 21, + 5, 9, 13, 17 +}; + +void VP8IteratorStartI4(VP8EncIterator* const it) { + const VP8Encoder* const enc = it->enc_; + int i; + + it->i4_ = 0; // first 4x4 sub-block + it->i4_top_ = it->i4_boundary_ + VP8TopLeftI4[0]; + + // Import the boundary samples + for (i = 0; i < 17; ++i) { // left + it->i4_boundary_[i] = enc->y_left_[15 - i]; + } + for (i = 0; i < 16; ++i) { // top + it->i4_boundary_[17 + i] = enc->y_top_[it->x_ * 16 + i]; + } + // top-right samples have a special case on the far right of the picture + if (it->x_ < enc->mb_w_ - 1) { + for (i = 16; i < 16 + 4; ++i) { + it->i4_boundary_[17 + i] = enc->y_top_[it->x_ * 16 + i]; + } + } else { // else, replicate the last valid pixel four times + for (i = 16; i < 16 + 4; ++i) { + it->i4_boundary_[17 + i] = it->i4_boundary_[17 + 15]; + } + } + VP8IteratorNzToBytes(it); // import the non-zero context +} + +int VP8IteratorRotateI4(VP8EncIterator* const it, + const uint8_t* const yuv_out) { + const uint8_t* const blk = yuv_out + VP8Scan[it->i4_]; + uint8_t* const top = it->i4_top_; + int i; + + // Update the cache with 7 fresh samples + for (i = 0; i <= 3; ++i) { + top[-4 + i] = blk[i + 3 * BPS]; // store future top samples + } + if ((it->i4_ & 3) != 3) { // if not on the right sub-blocks #3, #7, #11, #15 + for (i = 0; i <= 2; ++i) { // store future left samples + top[i] = blk[3 + (2 - i) * BPS]; + } + } else { // else replicate top-right samples, as says the specs. + for (i = 0; i <= 3; ++i) { + top[i] = top[i + 4]; + } + } + // move pointers to next sub-block + ++it->i4_; + if (it->i4_ == 16) { // we're done + return 0; + } + + it->i4_top_ = it->i4_boundary_ + VP8TopLeftI4[it->i4_]; + return 1; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webp/enc/layer.c b/drivers/webpold/enc/layer.c index 423127df63..423127df63 100644 --- a/drivers/webp/enc/layer.c +++ b/drivers/webpold/enc/layer.c diff --git a/drivers/webpold/enc/picture.c b/drivers/webpold/enc/picture.c new file mode 100644 index 0000000000..44eed06083 --- /dev/null +++ b/drivers/webpold/enc/picture.c @@ -0,0 +1,1041 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// WebPPicture utils: colorspace conversion, crop, ... +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include <math.h> + +#include "./vp8enci.h" +#include "../utils/rescaler.h" +#include "../utils/utils.h" +#include "../dsp/dsp.h" +#include "../dsp/yuv.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define HALVE(x) (((x) + 1) >> 1) +#define IS_YUV_CSP(csp, YUV_CSP) (((csp) & WEBP_CSP_UV_MASK) == (YUV_CSP)) + +static const union { + uint32_t argb; + uint8_t bytes[4]; +} test_endian = { 0xff000000u }; +#define ALPHA_IS_LAST (test_endian.bytes[3] == 0xff) + +//------------------------------------------------------------------------------ +// WebPPicture +//------------------------------------------------------------------------------ + +int WebPPictureAlloc(WebPPicture* picture) { + if (picture != NULL) { + const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; + const int has_alpha = picture->colorspace & WEBP_CSP_ALPHA_BIT; + const int width = picture->width; + const int height = picture->height; + + if (!picture->use_argb) { + const int y_stride = width; + const int uv_width = HALVE(width); + const int uv_height = HALVE(height); + const int uv_stride = uv_width; + int uv0_stride = 0; + int a_width, a_stride; + uint64_t y_size, uv_size, uv0_size, a_size, total_size; + uint8_t* mem; + + // U/V + switch (uv_csp) { + case WEBP_YUV420: + break; +#ifdef WEBP_EXPERIMENTAL_FEATURES + case WEBP_YUV400: // for now, we'll just reset the U/V samples + break; + case WEBP_YUV422: + uv0_stride = uv_width; + break; + case WEBP_YUV444: + uv0_stride = width; + break; +#endif + default: + return 0; + } + uv0_size = height * uv0_stride; + + // alpha + a_width = has_alpha ? width : 0; + a_stride = a_width; + y_size = (uint64_t)y_stride * height; + uv_size = (uint64_t)uv_stride * uv_height; + a_size = (uint64_t)a_stride * height; + + total_size = y_size + a_size + 2 * uv_size + 2 * uv0_size; + + // Security and validation checks + if (width <= 0 || height <= 0 || // luma/alpha param error + uv_width < 0 || uv_height < 0) { // u/v param error + return 0; + } + // Clear previous buffer and allocate a new one. + WebPPictureFree(picture); // erase previous buffer + mem = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*mem)); + if (mem == NULL) return 0; + + // From now on, we're in the clear, we can no longer fail... + picture->memory_ = (void*)mem; + picture->y_stride = y_stride; + picture->uv_stride = uv_stride; + picture->a_stride = a_stride; + picture->uv0_stride = uv0_stride; + // TODO(skal): we could align the y/u/v planes and adjust stride. + picture->y = mem; + mem += y_size; + + picture->u = mem; + mem += uv_size; + picture->v = mem; + mem += uv_size; + + if (a_size) { + picture->a = mem; + mem += a_size; + } + if (uv0_size) { + picture->u0 = mem; + mem += uv0_size; + picture->v0 = mem; + mem += uv0_size; + } + } else { + void* memory; + const uint64_t argb_size = (uint64_t)width * height; + if (width <= 0 || height <= 0) { + return 0; + } + // Clear previous buffer and allocate a new one. + WebPPictureFree(picture); // erase previous buffer + memory = WebPSafeMalloc(argb_size, sizeof(*picture->argb)); + if (memory == NULL) return 0; + + // TODO(skal): align plane to cache line? + picture->memory_argb_ = memory; + picture->argb = (uint32_t*)memory; + picture->argb_stride = width; + } + } + return 1; +} + +// Remove reference to the ARGB buffer (doesn't free anything). +static void PictureResetARGB(WebPPicture* const picture) { + picture->memory_argb_ = NULL; + picture->argb = NULL; + picture->argb_stride = 0; +} + +// Remove reference to the YUVA buffer (doesn't free anything). +static void PictureResetYUVA(WebPPicture* const picture) { + picture->memory_ = NULL; + picture->y = picture->u = picture->v = picture->a = NULL; + picture->u0 = picture->v0 = NULL; + picture->y_stride = picture->uv_stride = 0; + picture->a_stride = 0; + picture->uv0_stride = 0; +} + +// Grab the 'specs' (writer, *opaque, width, height...) from 'src' and copy them +// into 'dst'. Mark 'dst' as not owning any memory. +static void WebPPictureGrabSpecs(const WebPPicture* const src, + WebPPicture* const dst) { + assert(src != NULL && dst != NULL); + *dst = *src; + PictureResetYUVA(dst); + PictureResetARGB(dst); +} + +// Allocate a new argb buffer, discarding any existing one and preserving +// the other YUV(A) buffer. +static int PictureAllocARGB(WebPPicture* const picture) { + WebPPicture tmp; + free(picture->memory_argb_); + PictureResetARGB(picture); + picture->use_argb = 1; + WebPPictureGrabSpecs(picture, &tmp); + if (!WebPPictureAlloc(&tmp)) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); + } + picture->memory_argb_ = tmp.memory_argb_; + picture->argb = tmp.argb; + picture->argb_stride = tmp.argb_stride; + return 1; +} + +// Release memory owned by 'picture' (both YUV and ARGB buffers). +void WebPPictureFree(WebPPicture* picture) { + if (picture != NULL) { + free(picture->memory_); + free(picture->memory_argb_); + PictureResetYUVA(picture); + PictureResetARGB(picture); + } +} + +//------------------------------------------------------------------------------ +// Picture copying + +// Not worth moving to dsp/enc.c (only used here). +static void CopyPlane(const uint8_t* src, int src_stride, + uint8_t* dst, int dst_stride, int width, int height) { + while (height-- > 0) { + memcpy(dst, src, width); + src += src_stride; + dst += dst_stride; + } +} + +// Adjust top-left corner to chroma sample position. +static void SnapTopLeftPosition(const WebPPicture* const pic, + int* const left, int* const top) { + if (!pic->use_argb) { + const int is_yuv422 = IS_YUV_CSP(pic->colorspace, WEBP_YUV422); + if (IS_YUV_CSP(pic->colorspace, WEBP_YUV420) || is_yuv422) { + *left &= ~1; + if (!is_yuv422) *top &= ~1; + } + } +} + +// Adjust top-left corner and verify that the sub-rectangle is valid. +static int AdjustAndCheckRectangle(const WebPPicture* const pic, + int* const left, int* const top, + int width, int height) { + SnapTopLeftPosition(pic, left, top); + if ((*left) < 0 || (*top) < 0) return 0; + if (width <= 0 || height <= 0) return 0; + if ((*left) + width > pic->width) return 0; + if ((*top) + height > pic->height) return 0; + return 1; +} + +int WebPPictureCopy(const WebPPicture* src, WebPPicture* dst) { + if (src == NULL || dst == NULL) return 0; + if (src == dst) return 1; + + WebPPictureGrabSpecs(src, dst); + if (!WebPPictureAlloc(dst)) return 0; + + if (!src->use_argb) { + CopyPlane(src->y, src->y_stride, + dst->y, dst->y_stride, dst->width, dst->height); + CopyPlane(src->u, src->uv_stride, + dst->u, dst->uv_stride, HALVE(dst->width), HALVE(dst->height)); + CopyPlane(src->v, src->uv_stride, + dst->v, dst->uv_stride, HALVE(dst->width), HALVE(dst->height)); + if (dst->a != NULL) { + CopyPlane(src->a, src->a_stride, + dst->a, dst->a_stride, dst->width, dst->height); + } +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (dst->u0 != NULL) { + int uv0_width = src->width; + if (IS_YUV_CSP(dst->colorspace, WEBP_YUV422)) { + uv0_width = HALVE(uv0_width); + } + CopyPlane(src->u0, src->uv0_stride, + dst->u0, dst->uv0_stride, uv0_width, dst->height); + CopyPlane(src->v0, src->uv0_stride, + dst->v0, dst->uv0_stride, uv0_width, dst->height); + } +#endif + } else { + CopyPlane((const uint8_t*)src->argb, 4 * src->argb_stride, + (uint8_t*)dst->argb, 4 * dst->argb_stride, + 4 * dst->width, dst->height); + } + return 1; +} + +int WebPPictureIsView(const WebPPicture* picture) { + if (picture == NULL) return 0; + if (picture->use_argb) { + return (picture->memory_argb_ == NULL); + } + return (picture->memory_ == NULL); +} + +int WebPPictureView(const WebPPicture* src, + int left, int top, int width, int height, + WebPPicture* dst) { + if (src == NULL || dst == NULL) return 0; + + // verify rectangle position. + if (!AdjustAndCheckRectangle(src, &left, &top, width, height)) return 0; + + if (src != dst) { // beware of aliasing! We don't want to leak 'memory_'. + WebPPictureGrabSpecs(src, dst); + } + dst->width = width; + dst->height = height; + if (!src->use_argb) { + dst->y = src->y + top * src->y_stride + left; + dst->u = src->u + (top >> 1) * src->uv_stride + (left >> 1); + dst->v = src->v + (top >> 1) * src->uv_stride + (left >> 1); + if (src->a != NULL) { + dst->a = src->a + top * src->a_stride + left; + } +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (src->u0 != NULL) { + const int left_pos = + IS_YUV_CSP(dst->colorspace, WEBP_YUV422) ? (left >> 1) : left; + dst->u0 = src->u0 + top * src->uv0_stride + left_pos; + dst->v0 = src->v0 + top * src->uv0_stride + left_pos; + } +#endif + } else { + dst->argb = src->argb + top * src->argb_stride + left; + } + return 1; +} + +//------------------------------------------------------------------------------ +// Picture cropping + +int WebPPictureCrop(WebPPicture* pic, + int left, int top, int width, int height) { + WebPPicture tmp; + + if (pic == NULL) return 0; + if (!AdjustAndCheckRectangle(pic, &left, &top, width, height)) return 0; + + WebPPictureGrabSpecs(pic, &tmp); + tmp.width = width; + tmp.height = height; + if (!WebPPictureAlloc(&tmp)) return 0; + + if (!pic->use_argb) { + const int y_offset = top * pic->y_stride + left; + const int uv_offset = (top / 2) * pic->uv_stride + left / 2; + CopyPlane(pic->y + y_offset, pic->y_stride, + tmp.y, tmp.y_stride, width, height); + CopyPlane(pic->u + uv_offset, pic->uv_stride, + tmp.u, tmp.uv_stride, HALVE(width), HALVE(height)); + CopyPlane(pic->v + uv_offset, pic->uv_stride, + tmp.v, tmp.uv_stride, HALVE(width), HALVE(height)); + + if (tmp.a != NULL) { + const int a_offset = top * pic->a_stride + left; + CopyPlane(pic->a + a_offset, pic->a_stride, + tmp.a, tmp.a_stride, width, height); + } +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (tmp.u0 != NULL) { + int w = width; + int left_pos = left; + if (IS_YUV_CSP(tmp.colorspace, WEBP_YUV422)) { + w = HALVE(w); + left_pos = HALVE(left_pos); + } + CopyPlane(pic->u0 + top * pic->uv0_stride + left_pos, pic->uv0_stride, + tmp.u0, tmp.uv0_stride, w, height); + CopyPlane(pic->v0 + top * pic->uv0_stride + left_pos, pic->uv0_stride, + tmp.v0, tmp.uv0_stride, w, height); + } +#endif + } else { + const uint8_t* const src = + (const uint8_t*)(pic->argb + top * pic->argb_stride + left); + CopyPlane(src, pic->argb_stride * 4, + (uint8_t*)tmp.argb, tmp.argb_stride * 4, + width * 4, height); + } + WebPPictureFree(pic); + *pic = tmp; + return 1; +} + +//------------------------------------------------------------------------------ +// Simple picture rescaler + +static void RescalePlane(const uint8_t* src, + int src_width, int src_height, int src_stride, + uint8_t* dst, + int dst_width, int dst_height, int dst_stride, + int32_t* const work, + int num_channels) { + WebPRescaler rescaler; + int y = 0; + WebPRescalerInit(&rescaler, src_width, src_height, + dst, dst_width, dst_height, dst_stride, + num_channels, + src_width, dst_width, + src_height, dst_height, + work); + memset(work, 0, 2 * dst_width * num_channels * sizeof(*work)); + while (y < src_height) { + y += WebPRescalerImport(&rescaler, src_height - y, + src + y * src_stride, src_stride); + WebPRescalerExport(&rescaler); + } +} + +int WebPPictureRescale(WebPPicture* pic, int width, int height) { + WebPPicture tmp; + int prev_width, prev_height; + int32_t* work; + + if (pic == NULL) return 0; + prev_width = pic->width; + prev_height = pic->height; + // if width is unspecified, scale original proportionally to height ratio. + if (width == 0) { + width = (prev_width * height + prev_height / 2) / prev_height; + } + // if height is unspecified, scale original proportionally to width ratio. + if (height == 0) { + height = (prev_height * width + prev_width / 2) / prev_width; + } + // Check if the overall dimensions still make sense. + if (width <= 0 || height <= 0) return 0; + + WebPPictureGrabSpecs(pic, &tmp); + tmp.width = width; + tmp.height = height; + if (!WebPPictureAlloc(&tmp)) return 0; + + if (!pic->use_argb) { + work = (int32_t*)WebPSafeMalloc(2ULL * width, sizeof(*work)); + if (work == NULL) { + WebPPictureFree(&tmp); + return 0; + } + + RescalePlane(pic->y, prev_width, prev_height, pic->y_stride, + tmp.y, width, height, tmp.y_stride, work, 1); + RescalePlane(pic->u, + HALVE(prev_width), HALVE(prev_height), pic->uv_stride, + tmp.u, + HALVE(width), HALVE(height), tmp.uv_stride, work, 1); + RescalePlane(pic->v, + HALVE(prev_width), HALVE(prev_height), pic->uv_stride, + tmp.v, + HALVE(width), HALVE(height), tmp.uv_stride, work, 1); + + if (tmp.a != NULL) { + RescalePlane(pic->a, prev_width, prev_height, pic->a_stride, + tmp.a, width, height, tmp.a_stride, work, 1); + } +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (tmp.u0 != NULL) { + const int s = IS_YUV_CSP(tmp.colorspace, WEBP_YUV422) ? 2 : 1; + RescalePlane( + pic->u0, (prev_width + s / 2) / s, prev_height, pic->uv0_stride, + tmp.u0, (width + s / 2) / s, height, tmp.uv0_stride, work, 1); + RescalePlane( + pic->v0, (prev_width + s / 2) / s, prev_height, pic->uv0_stride, + tmp.v0, (width + s / 2) / s, height, tmp.uv0_stride, work, 1); + } +#endif + } else { + work = (int32_t*)WebPSafeMalloc(2ULL * width * 4, sizeof(*work)); + if (work == NULL) { + WebPPictureFree(&tmp); + return 0; + } + + RescalePlane((const uint8_t*)pic->argb, prev_width, prev_height, + pic->argb_stride * 4, + (uint8_t*)tmp.argb, width, height, + tmp.argb_stride * 4, + work, 4); + + } + WebPPictureFree(pic); + free(work); + *pic = tmp; + return 1; +} + +//------------------------------------------------------------------------------ +// WebPMemoryWriter: Write-to-memory + +void WebPMemoryWriterInit(WebPMemoryWriter* writer) { + writer->mem = NULL; + writer->size = 0; + writer->max_size = 0; +} + +int WebPMemoryWrite(const uint8_t* data, size_t data_size, + const WebPPicture* picture) { + WebPMemoryWriter* const w = (WebPMemoryWriter*)picture->custom_ptr; + uint64_t next_size; + if (w == NULL) { + return 1; + } + next_size = (uint64_t)w->size + data_size; + if (next_size > w->max_size) { + uint8_t* new_mem; + uint64_t next_max_size = 2ULL * w->max_size; + if (next_max_size < next_size) next_max_size = next_size; + if (next_max_size < 8192ULL) next_max_size = 8192ULL; + new_mem = (uint8_t*)WebPSafeMalloc(next_max_size, 1); + if (new_mem == NULL) { + return 0; + } + if (w->size > 0) { + memcpy(new_mem, w->mem, w->size); + } + free(w->mem); + w->mem = new_mem; + // down-cast is ok, thanks to WebPSafeMalloc + w->max_size = (size_t)next_max_size; + } + if (data_size > 0) { + memcpy(w->mem + w->size, data, data_size); + w->size += data_size; + } + return 1; +} + +//------------------------------------------------------------------------------ +// Detection of non-trivial transparency + +// Returns true if alpha[] has non-0xff values. +static int CheckNonOpaque(const uint8_t* alpha, int width, int height, + int x_step, int y_step) { + if (alpha == NULL) return 0; + while (height-- > 0) { + int x; + for (x = 0; x < width * x_step; x += x_step) { + if (alpha[x] != 0xff) return 1; // TODO(skal): check 4/8 bytes at a time. + } + alpha += y_step; + } + return 0; +} + +// Checking for the presence of non-opaque alpha. +int WebPPictureHasTransparency(const WebPPicture* picture) { + if (picture == NULL) return 0; + if (!picture->use_argb) { + return CheckNonOpaque(picture->a, picture->width, picture->height, + 1, picture->a_stride); + } else { + int x, y; + const uint32_t* argb = picture->argb; + if (argb == NULL) return 0; + for (y = 0; y < picture->height; ++y) { + for (x = 0; x < picture->width; ++x) { + if (argb[x] < 0xff000000u) return 1; // test any alpha values != 0xff + } + argb += picture->argb_stride; + } + } + return 0; +} + +//------------------------------------------------------------------------------ +// RGB -> YUV conversion + +// TODO: we can do better than simply 2x2 averaging on U/V samples. +#define SUM4(ptr) ((ptr)[0] + (ptr)[step] + \ + (ptr)[rgb_stride] + (ptr)[rgb_stride + step]) +#define SUM2H(ptr) (2 * (ptr)[0] + 2 * (ptr)[step]) +#define SUM2V(ptr) (2 * (ptr)[0] + 2 * (ptr)[rgb_stride]) +#define SUM1(ptr) (4 * (ptr)[0]) +#define RGB_TO_UV(x, y, SUM) { \ + const int src = (2 * (step * (x) + (y) * rgb_stride)); \ + const int dst = (x) + (y) * picture->uv_stride; \ + const int r = SUM(r_ptr + src); \ + const int g = SUM(g_ptr + src); \ + const int b = SUM(b_ptr + src); \ + picture->u[dst] = VP8RGBToU(r, g, b); \ + picture->v[dst] = VP8RGBToV(r, g, b); \ +} + +#define RGB_TO_UV0(x_in, x_out, y, SUM) { \ + const int src = (step * (x_in) + (y) * rgb_stride); \ + const int dst = (x_out) + (y) * picture->uv0_stride; \ + const int r = SUM(r_ptr + src); \ + const int g = SUM(g_ptr + src); \ + const int b = SUM(b_ptr + src); \ + picture->u0[dst] = VP8RGBToU(r, g, b); \ + picture->v0[dst] = VP8RGBToV(r, g, b); \ +} + +static void MakeGray(WebPPicture* const picture) { + int y; + const int uv_width = HALVE(picture->width); + const int uv_height = HALVE(picture->height); + for (y = 0; y < uv_height; ++y) { + memset(picture->u + y * picture->uv_stride, 128, uv_width); + memset(picture->v + y * picture->uv_stride, 128, uv_width); + } +} + +static int ImportYUVAFromRGBA(const uint8_t* const r_ptr, + const uint8_t* const g_ptr, + const uint8_t* const b_ptr, + const uint8_t* const a_ptr, + int step, // bytes per pixel + int rgb_stride, // bytes per scanline + WebPPicture* const picture) { + const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; + int x, y; + const int width = picture->width; + const int height = picture->height; + const int has_alpha = CheckNonOpaque(a_ptr, width, height, step, rgb_stride); + + picture->colorspace = uv_csp; + picture->use_argb = 0; + if (has_alpha) { + picture->colorspace |= WEBP_CSP_ALPHA_BIT; + } + if (!WebPPictureAlloc(picture)) return 0; + + // Import luma plane + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + const int offset = step * x + y * rgb_stride; + picture->y[x + y * picture->y_stride] = + VP8RGBToY(r_ptr[offset], g_ptr[offset], b_ptr[offset]); + } + } + + // Downsample U/V plane + if (uv_csp != WEBP_YUV400) { + for (y = 0; y < (height >> 1); ++y) { + for (x = 0; x < (width >> 1); ++x) { + RGB_TO_UV(x, y, SUM4); + } + if (width & 1) { + RGB_TO_UV(x, y, SUM2V); + } + } + if (height & 1) { + for (x = 0; x < (width >> 1); ++x) { + RGB_TO_UV(x, y, SUM2H); + } + if (width & 1) { + RGB_TO_UV(x, y, SUM1); + } + } + +#ifdef WEBP_EXPERIMENTAL_FEATURES + // Store original U/V samples too + if (uv_csp == WEBP_YUV422) { + for (y = 0; y < height; ++y) { + for (x = 0; x < (width >> 1); ++x) { + RGB_TO_UV0(2 * x, x, y, SUM2H); + } + if (width & 1) { + RGB_TO_UV0(2 * x, x, y, SUM1); + } + } + } else if (uv_csp == WEBP_YUV444) { + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + RGB_TO_UV0(x, x, y, SUM1); + } + } + } +#endif + } else { + MakeGray(picture); + } + + if (has_alpha) { + assert(step >= 4); + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + picture->a[x + y * picture->a_stride] = + a_ptr[step * x + y * rgb_stride]; + } + } + } + return 1; +} + +static int Import(WebPPicture* const picture, + const uint8_t* const rgb, int rgb_stride, + int step, int swap_rb, int import_alpha) { + const uint8_t* const r_ptr = rgb + (swap_rb ? 2 : 0); + const uint8_t* const g_ptr = rgb + 1; + const uint8_t* const b_ptr = rgb + (swap_rb ? 0 : 2); + const uint8_t* const a_ptr = import_alpha ? rgb + 3 : NULL; + const int width = picture->width; + const int height = picture->height; + + if (!picture->use_argb) { + return ImportYUVAFromRGBA(r_ptr, g_ptr, b_ptr, a_ptr, step, rgb_stride, + picture); + } + if (import_alpha) { + picture->colorspace |= WEBP_CSP_ALPHA_BIT; + } else { + picture->colorspace &= ~WEBP_CSP_ALPHA_BIT; + } + if (!WebPPictureAlloc(picture)) return 0; + + if (!import_alpha) { + int x, y; + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + const int offset = step * x + y * rgb_stride; + const uint32_t argb = + 0xff000000u | + (r_ptr[offset] << 16) | + (g_ptr[offset] << 8) | + (b_ptr[offset]); + picture->argb[x + y * picture->argb_stride] = argb; + } + } + } else { + int x, y; + assert(step >= 4); + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + const int offset = step * x + y * rgb_stride; + const uint32_t argb = (a_ptr[offset] << 24) | + (r_ptr[offset] << 16) | + (g_ptr[offset] << 8) | + (b_ptr[offset]); + picture->argb[x + y * picture->argb_stride] = argb; + } + } + } + return 1; +} +#undef SUM4 +#undef SUM2V +#undef SUM2H +#undef SUM1 +#undef RGB_TO_UV + +int WebPPictureImportRGB(WebPPicture* picture, + const uint8_t* rgb, int rgb_stride) { + return Import(picture, rgb, rgb_stride, 3, 0, 0); +} + +int WebPPictureImportBGR(WebPPicture* picture, + const uint8_t* rgb, int rgb_stride) { + return Import(picture, rgb, rgb_stride, 3, 1, 0); +} + +int WebPPictureImportRGBA(WebPPicture* picture, + const uint8_t* rgba, int rgba_stride) { + return Import(picture, rgba, rgba_stride, 4, 0, 1); +} + +int WebPPictureImportBGRA(WebPPicture* picture, + const uint8_t* rgba, int rgba_stride) { + return Import(picture, rgba, rgba_stride, 4, 1, 1); +} + +int WebPPictureImportRGBX(WebPPicture* picture, + const uint8_t* rgba, int rgba_stride) { + return Import(picture, rgba, rgba_stride, 4, 0, 0); +} + +int WebPPictureImportBGRX(WebPPicture* picture, + const uint8_t* rgba, int rgba_stride) { + return Import(picture, rgba, rgba_stride, 4, 1, 0); +} + +//------------------------------------------------------------------------------ +// Automatic YUV <-> ARGB conversions. + +int WebPPictureYUVAToARGB(WebPPicture* picture) { + if (picture == NULL) return 0; + if (picture->memory_ == NULL || picture->y == NULL || + picture->u == NULL || picture->v == NULL) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); + } + if ((picture->colorspace & WEBP_CSP_ALPHA_BIT) && picture->a == NULL) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); + } + if ((picture->colorspace & WEBP_CSP_UV_MASK) != WEBP_YUV420) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); + } + // Allocate a new argb buffer (discarding the previous one). + if (!PictureAllocARGB(picture)) return 0; + + // Convert + { + int y; + const int width = picture->width; + const int height = picture->height; + const int argb_stride = 4 * picture->argb_stride; + uint8_t* dst = (uint8_t*)picture->argb; + const uint8_t *cur_u = picture->u, *cur_v = picture->v, *cur_y = picture->y; + WebPUpsampleLinePairFunc upsample = WebPGetLinePairConverter(ALPHA_IS_LAST); + + // First row, with replicated top samples. + upsample(NULL, cur_y, cur_u, cur_v, cur_u, cur_v, NULL, dst, width); + cur_y += picture->y_stride; + dst += argb_stride; + // Center rows. + for (y = 1; y + 1 < height; y += 2) { + const uint8_t* const top_u = cur_u; + const uint8_t* const top_v = cur_v; + cur_u += picture->uv_stride; + cur_v += picture->uv_stride; + upsample(cur_y, cur_y + picture->y_stride, top_u, top_v, cur_u, cur_v, + dst, dst + argb_stride, width); + cur_y += 2 * picture->y_stride; + dst += 2 * argb_stride; + } + // Last row (if needed), with replicated bottom samples. + if (height > 1 && !(height & 1)) { + upsample(cur_y, NULL, cur_u, cur_v, cur_u, cur_v, dst, NULL, width); + } + // Insert alpha values if needed, in replacement for the default 0xff ones. + if (picture->colorspace & WEBP_CSP_ALPHA_BIT) { + for (y = 0; y < height; ++y) { + uint32_t* const dst = picture->argb + y * picture->argb_stride; + const uint8_t* const src = picture->a + y * picture->a_stride; + int x; + for (x = 0; x < width; ++x) { + dst[x] = (dst[x] & 0x00ffffffu) | (src[x] << 24); + } + } + } + } + return 1; +} + +int WebPPictureARGBToYUVA(WebPPicture* picture, WebPEncCSP colorspace) { + if (picture == NULL) return 0; + if (picture->argb == NULL) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); + } else { + const uint8_t* const argb = (const uint8_t*)picture->argb; + const uint8_t* const r = ALPHA_IS_LAST ? argb + 2 : argb + 1; + const uint8_t* const g = ALPHA_IS_LAST ? argb + 1 : argb + 2; + const uint8_t* const b = ALPHA_IS_LAST ? argb + 0 : argb + 3; + const uint8_t* const a = ALPHA_IS_LAST ? argb + 3 : argb + 0; + // We work on a tmp copy of 'picture', because ImportYUVAFromRGBA() + // would be calling WebPPictureFree(picture) otherwise. + WebPPicture tmp = *picture; + PictureResetARGB(&tmp); // reset ARGB buffer so that it's not free()'d. + tmp.use_argb = 0; + tmp.colorspace = colorspace & WEBP_CSP_UV_MASK; + if (!ImportYUVAFromRGBA(r, g, b, a, 4, 4 * picture->argb_stride, &tmp)) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); + } + // Copy back the YUV specs into 'picture'. + tmp.argb = picture->argb; + tmp.argb_stride = picture->argb_stride; + tmp.memory_argb_ = picture->memory_argb_; + *picture = tmp; + } + return 1; +} + +//------------------------------------------------------------------------------ +// Helper: clean up fully transparent area to help compressibility. + +#define SIZE 8 +#define SIZE2 (SIZE / 2) +static int is_transparent_area(const uint8_t* ptr, int stride, int size) { + int y, x; + for (y = 0; y < size; ++y) { + for (x = 0; x < size; ++x) { + if (ptr[x]) { + return 0; + } + } + ptr += stride; + } + return 1; +} + +static WEBP_INLINE void flatten(uint8_t* ptr, int v, int stride, int size) { + int y; + for (y = 0; y < size; ++y) { + memset(ptr, v, size); + ptr += stride; + } +} + +void WebPCleanupTransparentArea(WebPPicture* pic) { + int x, y, w, h; + const uint8_t* a_ptr; + int values[3] = { 0 }; + + if (pic == NULL) return; + + a_ptr = pic->a; + if (a_ptr == NULL) return; // nothing to do + + w = pic->width / SIZE; + h = pic->height / SIZE; + for (y = 0; y < h; ++y) { + int need_reset = 1; + for (x = 0; x < w; ++x) { + const int off_a = (y * pic->a_stride + x) * SIZE; + const int off_y = (y * pic->y_stride + x) * SIZE; + const int off_uv = (y * pic->uv_stride + x) * SIZE2; + if (is_transparent_area(a_ptr + off_a, pic->a_stride, SIZE)) { + if (need_reset) { + values[0] = pic->y[off_y]; + values[1] = pic->u[off_uv]; + values[2] = pic->v[off_uv]; + need_reset = 0; + } + flatten(pic->y + off_y, values[0], pic->y_stride, SIZE); + flatten(pic->u + off_uv, values[1], pic->uv_stride, SIZE2); + flatten(pic->v + off_uv, values[2], pic->uv_stride, SIZE2); + } else { + need_reset = 1; + } + } + // ignore the left-overs on right/bottom + } +} + +#undef SIZE +#undef SIZE2 + + +//------------------------------------------------------------------------------ +// Distortion + +// Max value returned in case of exact similarity. +static const double kMinDistortion_dB = 99.; + +int WebPPictureDistortion(const WebPPicture* pic1, const WebPPicture* pic2, + int type, float result[5]) { + int c; + DistoStats stats[5]; + int has_alpha; + + if (pic1 == NULL || pic2 == NULL || + pic1->width != pic2->width || pic1->height != pic2->height || + pic1->y == NULL || pic2->y == NULL || + pic1->u == NULL || pic2->u == NULL || + pic1->v == NULL || pic2->v == NULL || + result == NULL) { + return 0; + } + // TODO(skal): provide distortion for ARGB too. + if (pic1->use_argb == 1 || pic1->use_argb != pic2->use_argb) { + return 0; + } + + has_alpha = !!(pic1->colorspace & WEBP_CSP_ALPHA_BIT); + if (has_alpha != !!(pic2->colorspace & WEBP_CSP_ALPHA_BIT) || + (has_alpha && (pic1->a == NULL || pic2->a == NULL))) { + return 0; + } + + memset(stats, 0, sizeof(stats)); + VP8SSIMAccumulatePlane(pic1->y, pic1->y_stride, + pic2->y, pic2->y_stride, + pic1->width, pic1->height, &stats[0]); + VP8SSIMAccumulatePlane(pic1->u, pic1->uv_stride, + pic2->u, pic2->uv_stride, + (pic1->width + 1) >> 1, (pic1->height + 1) >> 1, + &stats[1]); + VP8SSIMAccumulatePlane(pic1->v, pic1->uv_stride, + pic2->v, pic2->uv_stride, + (pic1->width + 1) >> 1, (pic1->height + 1) >> 1, + &stats[2]); + if (has_alpha) { + VP8SSIMAccumulatePlane(pic1->a, pic1->a_stride, + pic2->a, pic2->a_stride, + pic1->width, pic1->height, &stats[3]); + } + for (c = 0; c <= 4; ++c) { + if (type == 1) { + const double v = VP8SSIMGet(&stats[c]); + result[c] = (float)((v < 1.) ? -10.0 * log10(1. - v) + : kMinDistortion_dB); + } else { + const double v = VP8SSIMGetSquaredError(&stats[c]); + result[c] = (float)((v > 0.) ? -4.3429448 * log(v / (255 * 255.)) + : kMinDistortion_dB); + } + // Accumulate forward + if (c < 4) VP8SSIMAddStats(&stats[c], &stats[4]); + } + return 1; +} + +//------------------------------------------------------------------------------ +// Simplest high-level calls: + +typedef int (*Importer)(WebPPicture* const, const uint8_t* const, int); + +static size_t Encode(const uint8_t* rgba, int width, int height, int stride, + Importer import, float quality_factor, int lossless, + uint8_t** output) { + WebPPicture pic; + WebPConfig config; + WebPMemoryWriter wrt; + int ok; + + if (!WebPConfigPreset(&config, WEBP_PRESET_DEFAULT, quality_factor) || + !WebPPictureInit(&pic)) { + return 0; // shouldn't happen, except if system installation is broken + } + + config.lossless = !!lossless; + pic.use_argb = !!lossless; + pic.width = width; + pic.height = height; + pic.writer = WebPMemoryWrite; + pic.custom_ptr = &wrt; + WebPMemoryWriterInit(&wrt); + + ok = import(&pic, rgba, stride) && WebPEncode(&config, &pic); + WebPPictureFree(&pic); + if (!ok) { + free(wrt.mem); + *output = NULL; + return 0; + } + *output = wrt.mem; + return wrt.size; +} + +#define ENCODE_FUNC(NAME, IMPORTER) \ +size_t NAME(const uint8_t* in, int w, int h, int bps, float q, \ + uint8_t** out) { \ + return Encode(in, w, h, bps, IMPORTER, q, 0, out); \ +} + +ENCODE_FUNC(WebPEncodeRGB, WebPPictureImportRGB); +ENCODE_FUNC(WebPEncodeBGR, WebPPictureImportBGR); +ENCODE_FUNC(WebPEncodeRGBA, WebPPictureImportRGBA); +ENCODE_FUNC(WebPEncodeBGRA, WebPPictureImportBGRA); + +#undef ENCODE_FUNC + +#define LOSSLESS_DEFAULT_QUALITY 70. +#define LOSSLESS_ENCODE_FUNC(NAME, IMPORTER) \ +size_t NAME(const uint8_t* in, int w, int h, int bps, uint8_t** out) { \ + return Encode(in, w, h, bps, IMPORTER, LOSSLESS_DEFAULT_QUALITY, 1, out); \ +} + +LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGB, WebPPictureImportRGB); +LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGR, WebPPictureImportBGR); +LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGBA, WebPPictureImportRGBA); +LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGRA, WebPPictureImportBGRA); + +#undef LOSSLESS_ENCODE_FUNC + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/quant.c b/drivers/webpold/enc/quant.c new file mode 100644 index 0000000000..ea153849c8 --- /dev/null +++ b/drivers/webpold/enc/quant.c @@ -0,0 +1,930 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Quantization +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <math.h> + +#include "./vp8enci.h" +#include "./cost.h" + +#define DO_TRELLIS_I4 1 +#define DO_TRELLIS_I16 1 // not a huge gain, but ok at low bitrate. +#define DO_TRELLIS_UV 0 // disable trellis for UV. Risky. Not worth. +#define USE_TDISTO 1 + +#define MID_ALPHA 64 // neutral value for susceptibility +#define MIN_ALPHA 30 // lowest usable value for susceptibility +#define MAX_ALPHA 100 // higher meaninful value for susceptibility + +#define SNS_TO_DQ 0.9 // Scaling constant between the sns value and the QP + // power-law modulation. Must be strictly less than 1. + +#define MULT_8B(a, b) (((a) * (b) + 128) >> 8) + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ + +static WEBP_INLINE int clip(int v, int m, int M) { + return v < m ? m : v > M ? M : v; +} + +static const uint8_t kZigzag[16] = { + 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 +}; + +static const uint8_t kDcTable[128] = { + 4, 5, 6, 7, 8, 9, 10, 10, + 11, 12, 13, 14, 15, 16, 17, 17, + 18, 19, 20, 20, 21, 21, 22, 22, + 23, 23, 24, 25, 25, 26, 27, 28, + 29, 30, 31, 32, 33, 34, 35, 36, + 37, 37, 38, 39, 40, 41, 42, 43, + 44, 45, 46, 46, 47, 48, 49, 50, + 51, 52, 53, 54, 55, 56, 57, 58, + 59, 60, 61, 62, 63, 64, 65, 66, + 67, 68, 69, 70, 71, 72, 73, 74, + 75, 76, 76, 77, 78, 79, 80, 81, + 82, 83, 84, 85, 86, 87, 88, 89, + 91, 93, 95, 96, 98, 100, 101, 102, + 104, 106, 108, 110, 112, 114, 116, 118, + 122, 124, 126, 128, 130, 132, 134, 136, + 138, 140, 143, 145, 148, 151, 154, 157 +}; + +static const uint16_t kAcTable[128] = { + 4, 5, 6, 7, 8, 9, 10, 11, + 12, 13, 14, 15, 16, 17, 18, 19, + 20, 21, 22, 23, 24, 25, 26, 27, + 28, 29, 30, 31, 32, 33, 34, 35, + 36, 37, 38, 39, 40, 41, 42, 43, + 44, 45, 46, 47, 48, 49, 50, 51, + 52, 53, 54, 55, 56, 57, 58, 60, + 62, 64, 66, 68, 70, 72, 74, 76, + 78, 80, 82, 84, 86, 88, 90, 92, + 94, 96, 98, 100, 102, 104, 106, 108, + 110, 112, 114, 116, 119, 122, 125, 128, + 131, 134, 137, 140, 143, 146, 149, 152, + 155, 158, 161, 164, 167, 170, 173, 177, + 181, 185, 189, 193, 197, 201, 205, 209, + 213, 217, 221, 225, 229, 234, 239, 245, + 249, 254, 259, 264, 269, 274, 279, 284 +}; + +static const uint16_t kAcTable2[128] = { + 8, 8, 9, 10, 12, 13, 15, 17, + 18, 20, 21, 23, 24, 26, 27, 29, + 31, 32, 34, 35, 37, 38, 40, 41, + 43, 44, 46, 48, 49, 51, 52, 54, + 55, 57, 58, 60, 62, 63, 65, 66, + 68, 69, 71, 72, 74, 75, 77, 79, + 80, 82, 83, 85, 86, 88, 89, 93, + 96, 99, 102, 105, 108, 111, 114, 117, + 120, 124, 127, 130, 133, 136, 139, 142, + 145, 148, 151, 155, 158, 161, 164, 167, + 170, 173, 176, 179, 184, 189, 193, 198, + 203, 207, 212, 217, 221, 226, 230, 235, + 240, 244, 249, 254, 258, 263, 268, 274, + 280, 286, 292, 299, 305, 311, 317, 323, + 330, 336, 342, 348, 354, 362, 370, 379, + 385, 393, 401, 409, 416, 424, 432, 440 +}; + +static const uint16_t kCoeffThresh[16] = { + 0, 10, 20, 30, + 10, 20, 30, 30, + 20, 30, 30, 30, + 30, 30, 30, 30 +}; + +// TODO(skal): tune more. Coeff thresholding? +static const uint8_t kBiasMatrices[3][16] = { // [3] = [luma-ac,luma-dc,chroma] + { 96, 96, 96, 96, + 96, 96, 96, 96, + 96, 96, 96, 96, + 96, 96, 96, 96 }, + { 96, 96, 96, 96, + 96, 96, 96, 96, + 96, 96, 96, 96, + 96, 96, 96, 96 }, + { 96, 96, 96, 96, + 96, 96, 96, 96, + 96, 96, 96, 96, + 96, 96, 96, 96 } +}; + +// Sharpening by (slightly) raising the hi-frequency coeffs (only for trellis). +// Hack-ish but helpful for mid-bitrate range. Use with care. +static const uint8_t kFreqSharpening[16] = { + 0, 30, 60, 90, + 30, 60, 90, 90, + 60, 90, 90, 90, + 90, 90, 90, 90 +}; + +//------------------------------------------------------------------------------ +// Initialize quantization parameters in VP8Matrix + +// Returns the average quantizer +static int ExpandMatrix(VP8Matrix* const m, int type) { + int i; + int sum = 0; + for (i = 2; i < 16; ++i) { + m->q_[i] = m->q_[1]; + } + for (i = 0; i < 16; ++i) { + const int j = kZigzag[i]; + const int bias = kBiasMatrices[type][j]; + m->iq_[j] = (1 << QFIX) / m->q_[j]; + m->bias_[j] = BIAS(bias); + // TODO(skal): tune kCoeffThresh[] + m->zthresh_[j] = ((256 /*+ kCoeffThresh[j]*/ - bias) * m->q_[j] + 127) >> 8; + m->sharpen_[j] = (kFreqSharpening[j] * m->q_[j]) >> 11; + sum += m->q_[j]; + } + return (sum + 8) >> 4; +} + +static void SetupMatrices(VP8Encoder* enc) { + int i; + const int tlambda_scale = + (enc->method_ >= 4) ? enc->config_->sns_strength + : 0; + const int num_segments = enc->segment_hdr_.num_segments_; + for (i = 0; i < num_segments; ++i) { + VP8SegmentInfo* const m = &enc->dqm_[i]; + const int q = m->quant_; + int q4, q16, quv; + m->y1_.q_[0] = kDcTable[clip(q + enc->dq_y1_dc_, 0, 127)]; + m->y1_.q_[1] = kAcTable[clip(q, 0, 127)]; + + m->y2_.q_[0] = kDcTable[ clip(q + enc->dq_y2_dc_, 0, 127)] * 2; + m->y2_.q_[1] = kAcTable2[clip(q + enc->dq_y2_ac_, 0, 127)]; + + m->uv_.q_[0] = kDcTable[clip(q + enc->dq_uv_dc_, 0, 117)]; + m->uv_.q_[1] = kAcTable[clip(q + enc->dq_uv_ac_, 0, 127)]; + + q4 = ExpandMatrix(&m->y1_, 0); + q16 = ExpandMatrix(&m->y2_, 1); + quv = ExpandMatrix(&m->uv_, 2); + + // TODO: Switch to kLambda*[] tables? + { + m->lambda_i4_ = (3 * q4 * q4) >> 7; + m->lambda_i16_ = (3 * q16 * q16); + m->lambda_uv_ = (3 * quv * quv) >> 6; + m->lambda_mode_ = (1 * q4 * q4) >> 7; + m->lambda_trellis_i4_ = (7 * q4 * q4) >> 3; + m->lambda_trellis_i16_ = (q16 * q16) >> 2; + m->lambda_trellis_uv_ = (quv *quv) << 1; + m->tlambda_ = (tlambda_scale * q4) >> 5; + } + } +} + +//------------------------------------------------------------------------------ +// Initialize filtering parameters + +// Very small filter-strength values have close to no visual effect. So we can +// save a little decoding-CPU by turning filtering off for these. +#define FSTRENGTH_CUTOFF 3 + +static void SetupFilterStrength(VP8Encoder* const enc) { + int i; + const int level0 = enc->config_->filter_strength; + for (i = 0; i < NUM_MB_SEGMENTS; ++i) { + // Segments with lower quantizer will be less filtered. TODO: tune (wrt SNS) + const int level = level0 * 256 * enc->dqm_[i].quant_ / 128; + const int f = level / (256 + enc->dqm_[i].beta_); + enc->dqm_[i].fstrength_ = (f < FSTRENGTH_CUTOFF) ? 0 : (f > 63) ? 63 : f; + } + // We record the initial strength (mainly for the case of 1-segment only). + enc->filter_hdr_.level_ = enc->dqm_[0].fstrength_; + enc->filter_hdr_.simple_ = (enc->config_->filter_type == 0); + enc->filter_hdr_.sharpness_ = enc->config_->filter_sharpness; +} + +//------------------------------------------------------------------------------ + +// Note: if you change the values below, remember that the max range +// allowed by the syntax for DQ_UV is [-16,16]. +#define MAX_DQ_UV (6) +#define MIN_DQ_UV (-4) + +// We want to emulate jpeg-like behaviour where the expected "good" quality +// is around q=75. Internally, our "good" middle is around c=50. So we +// map accordingly using linear piece-wise function +static double QualityToCompression(double q) { + const double c = q / 100.; + return (c < 0.75) ? c * (2. / 3.) : 2. * c - 1.; +} + +void VP8SetSegmentParams(VP8Encoder* const enc, float quality) { + int i; + int dq_uv_ac, dq_uv_dc; + const int num_segments = enc->config_->segments; + const double amp = SNS_TO_DQ * enc->config_->sns_strength / 100. / 128.; + const double c_base = QualityToCompression(quality); + for (i = 0; i < num_segments; ++i) { + // The file size roughly scales as pow(quantizer, 3.). Actually, the + // exponent is somewhere between 2.8 and 3.2, but we're mostly interested + // in the mid-quant range. So we scale the compressibility inversely to + // this power-law: quant ~= compression ^ 1/3. This law holds well for + // low quant. Finer modelling for high-quant would make use of kAcTable[] + // more explicitely. + // Additionally, we modulate the base exponent 1/3 to accommodate for the + // quantization susceptibility and allow denser segments to be quantized + // more. + const double expn = (1. - amp * enc->dqm_[i].alpha_) / 3.; + const double c = pow(c_base, expn); + const int q = (int)(127. * (1. - c)); + assert(expn > 0.); + enc->dqm_[i].quant_ = clip(q, 0, 127); + } + + // purely indicative in the bitstream (except for the 1-segment case) + enc->base_quant_ = enc->dqm_[0].quant_; + + // fill-in values for the unused segments (required by the syntax) + for (i = num_segments; i < NUM_MB_SEGMENTS; ++i) { + enc->dqm_[i].quant_ = enc->base_quant_; + } + + // uv_alpha_ is normally spread around ~60. The useful range is + // typically ~30 (quite bad) to ~100 (ok to decimate UV more). + // We map it to the safe maximal range of MAX/MIN_DQ_UV for dq_uv. + dq_uv_ac = (enc->uv_alpha_ - MID_ALPHA) * (MAX_DQ_UV - MIN_DQ_UV) + / (MAX_ALPHA - MIN_ALPHA); + // we rescale by the user-defined strength of adaptation + dq_uv_ac = dq_uv_ac * enc->config_->sns_strength / 100; + // and make it safe. + dq_uv_ac = clip(dq_uv_ac, MIN_DQ_UV, MAX_DQ_UV); + // We also boost the dc-uv-quant a little, based on sns-strength, since + // U/V channels are quite more reactive to high quants (flat DC-blocks + // tend to appear, and are displeasant). + dq_uv_dc = -4 * enc->config_->sns_strength / 100; + dq_uv_dc = clip(dq_uv_dc, -15, 15); // 4bit-signed max allowed + + enc->dq_y1_dc_ = 0; // TODO(skal): dq-lum + enc->dq_y2_dc_ = 0; + enc->dq_y2_ac_ = 0; + enc->dq_uv_dc_ = dq_uv_dc; + enc->dq_uv_ac_ = dq_uv_ac; + + SetupMatrices(enc); + + SetupFilterStrength(enc); // initialize segments' filtering, eventually +} + +//------------------------------------------------------------------------------ +// Form the predictions in cache + +// Must be ordered using {DC_PRED, TM_PRED, V_PRED, H_PRED} as index +const int VP8I16ModeOffsets[4] = { I16DC16, I16TM16, I16VE16, I16HE16 }; +const int VP8UVModeOffsets[4] = { C8DC8, C8TM8, C8VE8, C8HE8 }; + +// Must be indexed using {B_DC_PRED -> B_HU_PRED} as index +const int VP8I4ModeOffsets[NUM_BMODES] = { + I4DC4, I4TM4, I4VE4, I4HE4, I4RD4, I4VR4, I4LD4, I4VL4, I4HD4, I4HU4 +}; + +void VP8MakeLuma16Preds(const VP8EncIterator* const it) { + const VP8Encoder* const enc = it->enc_; + const uint8_t* const left = it->x_ ? enc->y_left_ : NULL; + const uint8_t* const top = it->y_ ? enc->y_top_ + it->x_ * 16 : NULL; + VP8EncPredLuma16(it->yuv_p_, left, top); +} + +void VP8MakeChroma8Preds(const VP8EncIterator* const it) { + const VP8Encoder* const enc = it->enc_; + const uint8_t* const left = it->x_ ? enc->u_left_ : NULL; + const uint8_t* const top = it->y_ ? enc->uv_top_ + it->x_ * 16 : NULL; + VP8EncPredChroma8(it->yuv_p_, left, top); +} + +void VP8MakeIntra4Preds(const VP8EncIterator* const it) { + VP8EncPredLuma4(it->yuv_p_, it->i4_top_); +} + +//------------------------------------------------------------------------------ +// Quantize + +// Layout: +// +----+ +// |YYYY| 0 +// |YYYY| 4 +// |YYYY| 8 +// |YYYY| 12 +// +----+ +// |UUVV| 16 +// |UUVV| 20 +// +----+ + +const int VP8Scan[16 + 4 + 4] = { + // Luma + 0 + 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS, + 0 + 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS, + 0 + 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS, + 0 + 12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS, + + 0 + 0 * BPS, 4 + 0 * BPS, 0 + 4 * BPS, 4 + 4 * BPS, // U + 8 + 0 * BPS, 12 + 0 * BPS, 8 + 4 * BPS, 12 + 4 * BPS // V +}; + +//------------------------------------------------------------------------------ +// Distortion measurement + +static const uint16_t kWeightY[16] = { + 38, 32, 20, 9, 32, 28, 17, 7, 20, 17, 10, 4, 9, 7, 4, 2 +}; + +static const uint16_t kWeightTrellis[16] = { +#if USE_TDISTO == 0 + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16 +#else + 30, 27, 19, 11, + 27, 24, 17, 10, + 19, 17, 12, 8, + 11, 10, 8, 6 +#endif +}; + +// Init/Copy the common fields in score. +static void InitScore(VP8ModeScore* const rd) { + rd->D = 0; + rd->SD = 0; + rd->R = 0; + rd->nz = 0; + rd->score = MAX_COST; +} + +static void CopyScore(VP8ModeScore* const dst, const VP8ModeScore* const src) { + dst->D = src->D; + dst->SD = src->SD; + dst->R = src->R; + dst->nz = src->nz; // note that nz is not accumulated, but just copied. + dst->score = src->score; +} + +static void AddScore(VP8ModeScore* const dst, const VP8ModeScore* const src) { + dst->D += src->D; + dst->SD += src->SD; + dst->R += src->R; + dst->nz |= src->nz; // here, new nz bits are accumulated. + dst->score += src->score; +} + +//------------------------------------------------------------------------------ +// Performs trellis-optimized quantization. + +// Trellis + +typedef struct { + int prev; // best previous + int level; // level + int sign; // sign of coeff_i + score_t cost; // bit cost + score_t error; // distortion = sum of (|coeff_i| - level_i * Q_i)^2 + int ctx; // context (only depends on 'level'. Could be spared.) +} Node; + +// If a coefficient was quantized to a value Q (using a neutral bias), +// we test all alternate possibilities between [Q-MIN_DELTA, Q+MAX_DELTA] +// We don't test negative values though. +#define MIN_DELTA 0 // how much lower level to try +#define MAX_DELTA 1 // how much higher +#define NUM_NODES (MIN_DELTA + 1 + MAX_DELTA) +#define NODE(n, l) (nodes[(n) + 1][(l) + MIN_DELTA]) + +static WEBP_INLINE void SetRDScore(int lambda, VP8ModeScore* const rd) { + // TODO: incorporate the "* 256" in the tables? + rd->score = rd->R * lambda + 256 * (rd->D + rd->SD); +} + +static WEBP_INLINE score_t RDScoreTrellis(int lambda, score_t rate, + score_t distortion) { + return rate * lambda + 256 * distortion; +} + +static int TrellisQuantizeBlock(const VP8EncIterator* const it, + int16_t in[16], int16_t out[16], + int ctx0, int coeff_type, + const VP8Matrix* const mtx, + int lambda) { + ProbaArray* const last_costs = it->enc_->proba_.coeffs_[coeff_type]; + CostArray* const costs = it->enc_->proba_.level_cost_[coeff_type]; + const int first = (coeff_type == 0) ? 1 : 0; + Node nodes[17][NUM_NODES]; + int best_path[3] = {-1, -1, -1}; // store best-last/best-level/best-previous + score_t best_score; + int best_node; + int last = first - 1; + int n, m, p, nz; + + { + score_t cost; + score_t max_error; + const int thresh = mtx->q_[1] * mtx->q_[1] / 4; + const int last_proba = last_costs[VP8EncBands[first]][ctx0][0]; + + // compute maximal distortion. + max_error = 0; + for (n = first; n < 16; ++n) { + const int j = kZigzag[n]; + const int err = in[j] * in[j]; + max_error += kWeightTrellis[j] * err; + if (err > thresh) last = n; + } + // we don't need to go inspect up to n = 16 coeffs. We can just go up + // to last + 1 (inclusive) without losing much. + if (last < 15) ++last; + + // compute 'skip' score. This is the max score one can do. + cost = VP8BitCost(0, last_proba); + best_score = RDScoreTrellis(lambda, cost, max_error); + + // initialize source node. + n = first - 1; + for (m = -MIN_DELTA; m <= MAX_DELTA; ++m) { + NODE(n, m).cost = 0; + NODE(n, m).error = max_error; + NODE(n, m).ctx = ctx0; + } + } + + // traverse trellis. + for (n = first; n <= last; ++n) { + const int j = kZigzag[n]; + const int Q = mtx->q_[j]; + const int iQ = mtx->iq_[j]; + const int B = BIAS(0x00); // neutral bias + // note: it's important to take sign of the _original_ coeff, + // so we don't have to consider level < 0 afterward. + const int sign = (in[j] < 0); + int coeff0 = (sign ? -in[j] : in[j]) + mtx->sharpen_[j]; + int level0; + if (coeff0 > 2047) coeff0 = 2047; + + level0 = QUANTDIV(coeff0, iQ, B); + // test all alternate level values around level0. + for (m = -MIN_DELTA; m <= MAX_DELTA; ++m) { + Node* const cur = &NODE(n, m); + int delta_error, new_error; + score_t cur_score = MAX_COST; + int level = level0 + m; + int last_proba; + + cur->sign = sign; + cur->level = level; + cur->ctx = (level == 0) ? 0 : (level == 1) ? 1 : 2; + if (level >= 2048 || level < 0) { // node is dead? + cur->cost = MAX_COST; + continue; + } + last_proba = last_costs[VP8EncBands[n + 1]][cur->ctx][0]; + + // Compute delta_error = how much coding this level will + // subtract as distortion to max_error + new_error = coeff0 - level * Q; + delta_error = + kWeightTrellis[j] * (coeff0 * coeff0 - new_error * new_error); + + // Inspect all possible non-dead predecessors. Retain only the best one. + for (p = -MIN_DELTA; p <= MAX_DELTA; ++p) { + const Node* const prev = &NODE(n - 1, p); + const int prev_ctx = prev->ctx; + const uint16_t* const tcost = costs[VP8EncBands[n]][prev_ctx]; + const score_t total_error = prev->error - delta_error; + score_t cost, base_cost, score; + + if (prev->cost >= MAX_COST) { // dead node? + continue; + } + + // Base cost of both terminal/non-terminal + base_cost = prev->cost + VP8LevelCost(tcost, level); + + // Examine node assuming it's a non-terminal one. + cost = base_cost; + if (level && n < 15) { + cost += VP8BitCost(1, last_proba); + } + score = RDScoreTrellis(lambda, cost, total_error); + if (score < cur_score) { + cur_score = score; + cur->cost = cost; + cur->error = total_error; + cur->prev = p; + } + + // Now, record best terminal node (and thus best entry in the graph). + if (level) { + cost = base_cost; + if (n < 15) cost += VP8BitCost(0, last_proba); + score = RDScoreTrellis(lambda, cost, total_error); + if (score < best_score) { + best_score = score; + best_path[0] = n; // best eob position + best_path[1] = m; // best level + best_path[2] = p; // best predecessor + } + } + } + } + } + + // Fresh start + memset(in + first, 0, (16 - first) * sizeof(*in)); + memset(out + first, 0, (16 - first) * sizeof(*out)); + if (best_path[0] == -1) { + return 0; // skip! + } + + // Unwind the best path. + // Note: best-prev on terminal node is not necessarily equal to the + // best_prev for non-terminal. So we patch best_path[2] in. + n = best_path[0]; + best_node = best_path[1]; + NODE(n, best_node).prev = best_path[2]; // force best-prev for terminal + nz = 0; + + for (; n >= first; --n) { + const Node* const node = &NODE(n, best_node); + const int j = kZigzag[n]; + out[n] = node->sign ? -node->level : node->level; + nz |= (node->level != 0); + in[j] = out[n] * mtx->q_[j]; + best_node = node->prev; + } + return nz; +} + +#undef NODE + +//------------------------------------------------------------------------------ +// Performs: difference, transform, quantize, back-transform, add +// all at once. Output is the reconstructed block in *yuv_out, and the +// quantized levels in *levels. + +static int ReconstructIntra16(VP8EncIterator* const it, + VP8ModeScore* const rd, + uint8_t* const yuv_out, + int mode) { + const VP8Encoder* const enc = it->enc_; + const uint8_t* const ref = it->yuv_p_ + VP8I16ModeOffsets[mode]; + const uint8_t* const src = it->yuv_in_ + Y_OFF; + const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; + int nz = 0; + int n; + int16_t tmp[16][16], dc_tmp[16]; + + for (n = 0; n < 16; ++n) { + VP8FTransform(src + VP8Scan[n], ref + VP8Scan[n], tmp[n]); + } + VP8FTransformWHT(tmp[0], dc_tmp); + nz |= VP8EncQuantizeBlock(dc_tmp, rd->y_dc_levels, 0, &dqm->y2_) << 24; + + if (DO_TRELLIS_I16 && it->do_trellis_) { + int x, y; + VP8IteratorNzToBytes(it); + for (y = 0, n = 0; y < 4; ++y) { + for (x = 0; x < 4; ++x, ++n) { + const int ctx = it->top_nz_[x] + it->left_nz_[y]; + const int non_zero = + TrellisQuantizeBlock(it, tmp[n], rd->y_ac_levels[n], ctx, 0, + &dqm->y1_, dqm->lambda_trellis_i16_); + it->top_nz_[x] = it->left_nz_[y] = non_zero; + nz |= non_zero << n; + } + } + } else { + for (n = 0; n < 16; ++n) { + nz |= VP8EncQuantizeBlock(tmp[n], rd->y_ac_levels[n], 1, &dqm->y1_) << n; + } + } + + // Transform back + VP8ITransformWHT(dc_tmp, tmp[0]); + for (n = 0; n < 16; n += 2) { + VP8ITransform(ref + VP8Scan[n], tmp[n], yuv_out + VP8Scan[n], 1); + } + + return nz; +} + +static int ReconstructIntra4(VP8EncIterator* const it, + int16_t levels[16], + const uint8_t* const src, + uint8_t* const yuv_out, + int mode) { + const VP8Encoder* const enc = it->enc_; + const uint8_t* const ref = it->yuv_p_ + VP8I4ModeOffsets[mode]; + const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; + int nz = 0; + int16_t tmp[16]; + + VP8FTransform(src, ref, tmp); + if (DO_TRELLIS_I4 && it->do_trellis_) { + const int x = it->i4_ & 3, y = it->i4_ >> 2; + const int ctx = it->top_nz_[x] + it->left_nz_[y]; + nz = TrellisQuantizeBlock(it, tmp, levels, ctx, 3, &dqm->y1_, + dqm->lambda_trellis_i4_); + } else { + nz = VP8EncQuantizeBlock(tmp, levels, 0, &dqm->y1_); + } + VP8ITransform(ref, tmp, yuv_out, 0); + return nz; +} + +static int ReconstructUV(VP8EncIterator* const it, VP8ModeScore* const rd, + uint8_t* const yuv_out, int mode) { + const VP8Encoder* const enc = it->enc_; + const uint8_t* const ref = it->yuv_p_ + VP8UVModeOffsets[mode]; + const uint8_t* const src = it->yuv_in_ + U_OFF; + const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; + int nz = 0; + int n; + int16_t tmp[8][16]; + + for (n = 0; n < 8; ++n) { + VP8FTransform(src + VP8Scan[16 + n], ref + VP8Scan[16 + n], tmp[n]); + } + if (DO_TRELLIS_UV && it->do_trellis_) { + int ch, x, y; + for (ch = 0, n = 0; ch <= 2; ch += 2) { + for (y = 0; y < 2; ++y) { + for (x = 0; x < 2; ++x, ++n) { + const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; + const int non_zero = + TrellisQuantizeBlock(it, tmp[n], rd->uv_levels[n], ctx, 2, + &dqm->uv_, dqm->lambda_trellis_uv_); + it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = non_zero; + nz |= non_zero << n; + } + } + } + } else { + for (n = 0; n < 8; ++n) { + nz |= VP8EncQuantizeBlock(tmp[n], rd->uv_levels[n], 0, &dqm->uv_) << n; + } + } + + for (n = 0; n < 8; n += 2) { + VP8ITransform(ref + VP8Scan[16 + n], tmp[n], yuv_out + VP8Scan[16 + n], 1); + } + return (nz << 16); +} + +//------------------------------------------------------------------------------ +// RD-opt decision. Reconstruct each modes, evalue distortion and bit-cost. +// Pick the mode is lower RD-cost = Rate + lamba * Distortion. + +static void SwapPtr(uint8_t** a, uint8_t** b) { + uint8_t* const tmp = *a; + *a = *b; + *b = tmp; +} + +static void SwapOut(VP8EncIterator* const it) { + SwapPtr(&it->yuv_out_, &it->yuv_out2_); +} + +static void PickBestIntra16(VP8EncIterator* const it, VP8ModeScore* const rd) { + const VP8Encoder* const enc = it->enc_; + const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; + const int lambda = dqm->lambda_i16_; + const int tlambda = dqm->tlambda_; + const uint8_t* const src = it->yuv_in_ + Y_OFF; + VP8ModeScore rd16; + int mode; + + rd->mode_i16 = -1; + for (mode = 0; mode < 4; ++mode) { + uint8_t* const tmp_dst = it->yuv_out2_ + Y_OFF; // scratch buffer + int nz; + + // Reconstruct + nz = ReconstructIntra16(it, &rd16, tmp_dst, mode); + + // Measure RD-score + rd16.D = VP8SSE16x16(src, tmp_dst); + rd16.SD = tlambda ? MULT_8B(tlambda, VP8TDisto16x16(src, tmp_dst, kWeightY)) + : 0; + rd16.R = VP8GetCostLuma16(it, &rd16); + rd16.R += VP8FixedCostsI16[mode]; + + // Since we always examine Intra16 first, we can overwrite *rd directly. + SetRDScore(lambda, &rd16); + if (mode == 0 || rd16.score < rd->score) { + CopyScore(rd, &rd16); + rd->mode_i16 = mode; + rd->nz = nz; + memcpy(rd->y_ac_levels, rd16.y_ac_levels, sizeof(rd16.y_ac_levels)); + memcpy(rd->y_dc_levels, rd16.y_dc_levels, sizeof(rd16.y_dc_levels)); + SwapOut(it); + } + } + SetRDScore(dqm->lambda_mode_, rd); // finalize score for mode decision. + VP8SetIntra16Mode(it, rd->mode_i16); +} + +//------------------------------------------------------------------------------ + +// return the cost array corresponding to the surrounding prediction modes. +static const uint16_t* GetCostModeI4(VP8EncIterator* const it, + const uint8_t modes[16]) { + const int preds_w = it->enc_->preds_w_; + const int x = (it->i4_ & 3), y = it->i4_ >> 2; + const int left = (x == 0) ? it->preds_[y * preds_w - 1] : modes[it->i4_ - 1]; + const int top = (y == 0) ? it->preds_[-preds_w + x] : modes[it->i4_ - 4]; + return VP8FixedCostsI4[top][left]; +} + +static int PickBestIntra4(VP8EncIterator* const it, VP8ModeScore* const rd) { + const VP8Encoder* const enc = it->enc_; + const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; + const int lambda = dqm->lambda_i4_; + const int tlambda = dqm->tlambda_; + const uint8_t* const src0 = it->yuv_in_ + Y_OFF; + uint8_t* const best_blocks = it->yuv_out2_ + Y_OFF; + int total_header_bits = 0; + VP8ModeScore rd_best; + + if (enc->max_i4_header_bits_ == 0) { + return 0; + } + + InitScore(&rd_best); + rd_best.score = 211; // '211' is the value of VP8BitCost(0, 145) + VP8IteratorStartI4(it); + do { + VP8ModeScore rd_i4; + int mode; + int best_mode = -1; + const uint8_t* const src = src0 + VP8Scan[it->i4_]; + const uint16_t* const mode_costs = GetCostModeI4(it, rd->modes_i4); + uint8_t* best_block = best_blocks + VP8Scan[it->i4_]; + uint8_t* tmp_dst = it->yuv_p_ + I4TMP; // scratch buffer. + + InitScore(&rd_i4); + VP8MakeIntra4Preds(it); + for (mode = 0; mode < NUM_BMODES; ++mode) { + VP8ModeScore rd_tmp; + int16_t tmp_levels[16]; + + // Reconstruct + rd_tmp.nz = + ReconstructIntra4(it, tmp_levels, src, tmp_dst, mode) << it->i4_; + + // Compute RD-score + rd_tmp.D = VP8SSE4x4(src, tmp_dst); + rd_tmp.SD = + tlambda ? MULT_8B(tlambda, VP8TDisto4x4(src, tmp_dst, kWeightY)) + : 0; + rd_tmp.R = VP8GetCostLuma4(it, tmp_levels); + rd_tmp.R += mode_costs[mode]; + + SetRDScore(lambda, &rd_tmp); + if (best_mode < 0 || rd_tmp.score < rd_i4.score) { + CopyScore(&rd_i4, &rd_tmp); + best_mode = mode; + SwapPtr(&tmp_dst, &best_block); + memcpy(rd_best.y_ac_levels[it->i4_], tmp_levels, sizeof(tmp_levels)); + } + } + SetRDScore(dqm->lambda_mode_, &rd_i4); + AddScore(&rd_best, &rd_i4); + total_header_bits += mode_costs[best_mode]; + if (rd_best.score >= rd->score || + total_header_bits > enc->max_i4_header_bits_) { + return 0; + } + // Copy selected samples if not in the right place already. + if (best_block != best_blocks + VP8Scan[it->i4_]) + VP8Copy4x4(best_block, best_blocks + VP8Scan[it->i4_]); + rd->modes_i4[it->i4_] = best_mode; + it->top_nz_[it->i4_ & 3] = it->left_nz_[it->i4_ >> 2] = (rd_i4.nz ? 1 : 0); + } while (VP8IteratorRotateI4(it, best_blocks)); + + // finalize state + CopyScore(rd, &rd_best); + VP8SetIntra4Mode(it, rd->modes_i4); + SwapOut(it); + memcpy(rd->y_ac_levels, rd_best.y_ac_levels, sizeof(rd->y_ac_levels)); + return 1; // select intra4x4 over intra16x16 +} + +//------------------------------------------------------------------------------ + +static void PickBestUV(VP8EncIterator* const it, VP8ModeScore* const rd) { + const VP8Encoder* const enc = it->enc_; + const VP8SegmentInfo* const dqm = &enc->dqm_[it->mb_->segment_]; + const int lambda = dqm->lambda_uv_; + const uint8_t* const src = it->yuv_in_ + U_OFF; + uint8_t* const tmp_dst = it->yuv_out2_ + U_OFF; // scratch buffer + uint8_t* const dst0 = it->yuv_out_ + U_OFF; + VP8ModeScore rd_best; + int mode; + + rd->mode_uv = -1; + InitScore(&rd_best); + for (mode = 0; mode < 4; ++mode) { + VP8ModeScore rd_uv; + + // Reconstruct + rd_uv.nz = ReconstructUV(it, &rd_uv, tmp_dst, mode); + + // Compute RD-score + rd_uv.D = VP8SSE16x8(src, tmp_dst); + rd_uv.SD = 0; // TODO: should we call TDisto? it tends to flatten areas. + rd_uv.R = VP8GetCostUV(it, &rd_uv); + rd_uv.R += VP8FixedCostsUV[mode]; + + SetRDScore(lambda, &rd_uv); + if (mode == 0 || rd_uv.score < rd_best.score) { + CopyScore(&rd_best, &rd_uv); + rd->mode_uv = mode; + memcpy(rd->uv_levels, rd_uv.uv_levels, sizeof(rd->uv_levels)); + memcpy(dst0, tmp_dst, UV_SIZE); // TODO: SwapUVOut() ? + } + } + VP8SetIntraUVMode(it, rd->mode_uv); + AddScore(rd, &rd_best); +} + +//------------------------------------------------------------------------------ +// Final reconstruction and quantization. + +static void SimpleQuantize(VP8EncIterator* const it, VP8ModeScore* const rd) { + const VP8Encoder* const enc = it->enc_; + const int i16 = (it->mb_->type_ == 1); + int nz = 0; + + if (i16) { + nz = ReconstructIntra16(it, rd, it->yuv_out_ + Y_OFF, it->preds_[0]); + } else { + VP8IteratorStartI4(it); + do { + const int mode = + it->preds_[(it->i4_ & 3) + (it->i4_ >> 2) * enc->preds_w_]; + const uint8_t* const src = it->yuv_in_ + Y_OFF + VP8Scan[it->i4_]; + uint8_t* const dst = it->yuv_out_ + Y_OFF + VP8Scan[it->i4_]; + VP8MakeIntra4Preds(it); + nz |= ReconstructIntra4(it, rd->y_ac_levels[it->i4_], + src, dst, mode) << it->i4_; + } while (VP8IteratorRotateI4(it, it->yuv_out_ + Y_OFF)); + } + + nz |= ReconstructUV(it, rd, it->yuv_out_ + U_OFF, it->mb_->uv_mode_); + rd->nz = nz; +} + +//------------------------------------------------------------------------------ +// Entry point + +int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt) { + int is_skipped; + + InitScore(rd); + + // We can perform predictions for Luma16x16 and Chroma8x8 already. + // Luma4x4 predictions needs to be done as-we-go. + VP8MakeLuma16Preds(it); + VP8MakeChroma8Preds(it); + + // for rd_opt = 2, we perform trellis-quant on the final decision only. + // for rd_opt > 2, we use it for every scoring (=much slower). + if (rd_opt > 0) { + it->do_trellis_ = (rd_opt > 2); + PickBestIntra16(it, rd); + if (it->enc_->method_ >= 2) { + PickBestIntra4(it, rd); + } + PickBestUV(it, rd); + if (rd_opt == 2) { + it->do_trellis_ = 1; + SimpleQuantize(it, rd); + } + } else { + // TODO: for method_ == 2, pick the best intra4/intra16 based on SSE + it->do_trellis_ = (it->enc_->method_ == 2); + SimpleQuantize(it, rd); + } + is_skipped = (rd->nz == 0); + VP8SetSkip(it, is_skipped); + return is_skipped; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/syntax.c b/drivers/webpold/enc/syntax.c new file mode 100644 index 0000000000..4221436ff9 --- /dev/null +++ b/drivers/webpold/enc/syntax.c @@ -0,0 +1,437 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Header syntax writing +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> + +#include "../format_constants.h" +#include "./vp8enci.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Helper functions + +// TODO(later): Move to webp/format_constants.h? +static void PutLE24(uint8_t* const data, uint32_t val) { + data[0] = (val >> 0) & 0xff; + data[1] = (val >> 8) & 0xff; + data[2] = (val >> 16) & 0xff; +} + +static void PutLE32(uint8_t* const data, uint32_t val) { + PutLE24(data, val); + data[3] = (val >> 24) & 0xff; +} + +static int IsVP8XNeeded(const VP8Encoder* const enc) { + return !!enc->has_alpha_; // Currently the only case when VP8X is needed. + // This could change in the future. +} + +static int PutPaddingByte(const WebPPicture* const pic) { + + const uint8_t pad_byte[1] = { 0 }; + return !!pic->writer(pad_byte, 1, pic); +} + +//------------------------------------------------------------------------------ +// Writers for header's various pieces (in order of appearance) + +static WebPEncodingError PutRIFFHeader(const VP8Encoder* const enc, + size_t riff_size) { + const WebPPicture* const pic = enc->pic_; + uint8_t riff[RIFF_HEADER_SIZE] = { + 'R', 'I', 'F', 'F', 0, 0, 0, 0, 'W', 'E', 'B', 'P' + }; + assert(riff_size == (uint32_t)riff_size); + PutLE32(riff + TAG_SIZE, (uint32_t)riff_size); + if (!pic->writer(riff, sizeof(riff), pic)) { + return VP8_ENC_ERROR_BAD_WRITE; + } + return VP8_ENC_OK; +} + +static WebPEncodingError PutVP8XHeader(const VP8Encoder* const enc) { + const WebPPicture* const pic = enc->pic_; + uint8_t vp8x[CHUNK_HEADER_SIZE + VP8X_CHUNK_SIZE] = { + 'V', 'P', '8', 'X' + }; + uint32_t flags = 0; + + assert(IsVP8XNeeded(enc)); + assert(pic->width >= 1 && pic->height >= 1); + assert(pic->width <= MAX_CANVAS_SIZE && pic->height <= MAX_CANVAS_SIZE); + + if (enc->has_alpha_) { + flags |= ALPHA_FLAG_BIT; + } + + PutLE32(vp8x + TAG_SIZE, VP8X_CHUNK_SIZE); + PutLE32(vp8x + CHUNK_HEADER_SIZE, flags); + PutLE24(vp8x + CHUNK_HEADER_SIZE + 4, pic->width - 1); + PutLE24(vp8x + CHUNK_HEADER_SIZE + 7, pic->height - 1); + if(!pic->writer(vp8x, sizeof(vp8x), pic)) { + return VP8_ENC_ERROR_BAD_WRITE; + } + return VP8_ENC_OK; +} + +static WebPEncodingError PutAlphaChunk(const VP8Encoder* const enc) { + const WebPPicture* const pic = enc->pic_; + uint8_t alpha_chunk_hdr[CHUNK_HEADER_SIZE] = { + 'A', 'L', 'P', 'H' + }; + + assert(enc->has_alpha_); + + // Alpha chunk header. + PutLE32(alpha_chunk_hdr + TAG_SIZE, enc->alpha_data_size_); + if (!pic->writer(alpha_chunk_hdr, sizeof(alpha_chunk_hdr), pic)) { + return VP8_ENC_ERROR_BAD_WRITE; + } + + // Alpha chunk data. + if (!pic->writer(enc->alpha_data_, enc->alpha_data_size_, pic)) { + return VP8_ENC_ERROR_BAD_WRITE; + } + + // Padding. + if ((enc->alpha_data_size_ & 1) && !PutPaddingByte(pic)) { + return VP8_ENC_ERROR_BAD_WRITE; + } + return VP8_ENC_OK; +} + +static WebPEncodingError PutVP8Header(const WebPPicture* const pic, + size_t vp8_size) { + uint8_t vp8_chunk_hdr[CHUNK_HEADER_SIZE] = { + 'V', 'P', '8', ' ' + }; + assert(vp8_size == (uint32_t)vp8_size); + PutLE32(vp8_chunk_hdr + TAG_SIZE, (uint32_t)vp8_size); + if (!pic->writer(vp8_chunk_hdr, sizeof(vp8_chunk_hdr), pic)) { + return VP8_ENC_ERROR_BAD_WRITE; + } + return VP8_ENC_OK; +} + +static WebPEncodingError PutVP8FrameHeader(const WebPPicture* const pic, + int profile, size_t size0) { + uint8_t vp8_frm_hdr[VP8_FRAME_HEADER_SIZE]; + uint32_t bits; + + if (size0 >= VP8_MAX_PARTITION0_SIZE) { // partition #0 is too big to fit + return VP8_ENC_ERROR_PARTITION0_OVERFLOW; + } + + // Paragraph 9.1. + bits = 0 // keyframe (1b) + | (profile << 1) // profile (3b) + | (1 << 4) // visible (1b) + | ((uint32_t)size0 << 5); // partition length (19b) + vp8_frm_hdr[0] = (bits >> 0) & 0xff; + vp8_frm_hdr[1] = (bits >> 8) & 0xff; + vp8_frm_hdr[2] = (bits >> 16) & 0xff; + // signature + vp8_frm_hdr[3] = (VP8_SIGNATURE >> 16) & 0xff; + vp8_frm_hdr[4] = (VP8_SIGNATURE >> 8) & 0xff; + vp8_frm_hdr[5] = (VP8_SIGNATURE >> 0) & 0xff; + // dimensions + vp8_frm_hdr[6] = pic->width & 0xff; + vp8_frm_hdr[7] = pic->width >> 8; + vp8_frm_hdr[8] = pic->height & 0xff; + vp8_frm_hdr[9] = pic->height >> 8; + + if (!pic->writer(vp8_frm_hdr, sizeof(vp8_frm_hdr), pic)) { + return VP8_ENC_ERROR_BAD_WRITE; + } + return VP8_ENC_OK; +} + +// WebP Headers. +static int PutWebPHeaders(const VP8Encoder* const enc, size_t size0, + size_t vp8_size, size_t riff_size) { + WebPPicture* const pic = enc->pic_; + WebPEncodingError err = VP8_ENC_OK; + + // RIFF header. + err = PutRIFFHeader(enc, riff_size); + if (err != VP8_ENC_OK) goto Error; + + // VP8X. + if (IsVP8XNeeded(enc)) { + err = PutVP8XHeader(enc); + if (err != VP8_ENC_OK) goto Error; + } + + // Alpha. + if (enc->has_alpha_) { + err = PutAlphaChunk(enc); + if (err != VP8_ENC_OK) goto Error; + } + + // VP8 header. + err = PutVP8Header(pic, vp8_size); + if (err != VP8_ENC_OK) goto Error; + + // VP8 frame header. + err = PutVP8FrameHeader(pic, enc->profile_, size0); + if (err != VP8_ENC_OK) goto Error; + + // All OK. + return 1; + + // Error. + Error: + return WebPEncodingSetError(pic, err); +} + +// Segmentation header +static void PutSegmentHeader(VP8BitWriter* const bw, + const VP8Encoder* const enc) { + const VP8SegmentHeader* const hdr = &enc->segment_hdr_; + const VP8Proba* const proba = &enc->proba_; + if (VP8PutBitUniform(bw, (hdr->num_segments_ > 1))) { + // We always 'update' the quant and filter strength values + const int update_data = 1; + int s; + VP8PutBitUniform(bw, hdr->update_map_); + if (VP8PutBitUniform(bw, update_data)) { + // we always use absolute values, not relative ones + VP8PutBitUniform(bw, 1); // (segment_feature_mode = 1. Paragraph 9.3.) + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + VP8PutSignedValue(bw, enc->dqm_[s].quant_, 7); + } + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + VP8PutSignedValue(bw, enc->dqm_[s].fstrength_, 6); + } + } + if (hdr->update_map_) { + for (s = 0; s < 3; ++s) { + if (VP8PutBitUniform(bw, (proba->segments_[s] != 255u))) { + VP8PutValue(bw, proba->segments_[s], 8); + } + } + } + } +} + +// Filtering parameters header +static void PutFilterHeader(VP8BitWriter* const bw, + const VP8FilterHeader* const hdr) { + const int use_lf_delta = (hdr->i4x4_lf_delta_ != 0); + VP8PutBitUniform(bw, hdr->simple_); + VP8PutValue(bw, hdr->level_, 6); + VP8PutValue(bw, hdr->sharpness_, 3); + if (VP8PutBitUniform(bw, use_lf_delta)) { + // '0' is the default value for i4x4_lf_delta_ at frame #0. + const int need_update = (hdr->i4x4_lf_delta_ != 0); + if (VP8PutBitUniform(bw, need_update)) { + // we don't use ref_lf_delta => emit four 0 bits + VP8PutValue(bw, 0, 4); + // we use mode_lf_delta for i4x4 + VP8PutSignedValue(bw, hdr->i4x4_lf_delta_, 6); + VP8PutValue(bw, 0, 3); // all others unused + } + } +} + +// Nominal quantization parameters +static void PutQuant(VP8BitWriter* const bw, + const VP8Encoder* const enc) { + VP8PutValue(bw, enc->base_quant_, 7); + VP8PutSignedValue(bw, enc->dq_y1_dc_, 4); + VP8PutSignedValue(bw, enc->dq_y2_dc_, 4); + VP8PutSignedValue(bw, enc->dq_y2_ac_, 4); + VP8PutSignedValue(bw, enc->dq_uv_dc_, 4); + VP8PutSignedValue(bw, enc->dq_uv_ac_, 4); +} + +// Partition sizes +static int EmitPartitionsSize(const VP8Encoder* const enc, + WebPPicture* const pic) { + uint8_t buf[3 * (MAX_NUM_PARTITIONS - 1)]; + int p; + for (p = 0; p < enc->num_parts_ - 1; ++p) { + const size_t part_size = VP8BitWriterSize(enc->parts_ + p); + if (part_size >= VP8_MAX_PARTITION_SIZE) { + return WebPEncodingSetError(pic, VP8_ENC_ERROR_PARTITION_OVERFLOW); + } + buf[3 * p + 0] = (part_size >> 0) & 0xff; + buf[3 * p + 1] = (part_size >> 8) & 0xff; + buf[3 * p + 2] = (part_size >> 16) & 0xff; + } + return p ? pic->writer(buf, 3 * p, pic) : 1; +} + +//------------------------------------------------------------------------------ + +#ifdef WEBP_EXPERIMENTAL_FEATURES + +#define KTRAILER_SIZE 8 + +static int WriteExtensions(VP8Encoder* const enc) { + uint8_t buffer[KTRAILER_SIZE]; + VP8BitWriter* const bw = &enc->bw_; + WebPPicture* const pic = enc->pic_; + + // Layer (bytes 0..3) + PutLE24(buffer + 0, enc->layer_data_size_); + buffer[3] = enc->pic_->colorspace & WEBP_CSP_UV_MASK; + if (enc->layer_data_size_ > 0) { + assert(enc->use_layer_); + // append layer data to last partition + if (!VP8BitWriterAppend(&enc->parts_[enc->num_parts_ - 1], + enc->layer_data_, enc->layer_data_size_)) { + return WebPEncodingSetError(pic, VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY); + } + } + + buffer[KTRAILER_SIZE - 1] = 0x01; // marker + if (!VP8BitWriterAppend(bw, buffer, KTRAILER_SIZE)) { + return WebPEncodingSetError(pic, VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY); + } + return 1; +} + +#endif /* WEBP_EXPERIMENTAL_FEATURES */ + +//------------------------------------------------------------------------------ + +static size_t GeneratePartition0(VP8Encoder* const enc) { + VP8BitWriter* const bw = &enc->bw_; + const int mb_size = enc->mb_w_ * enc->mb_h_; + uint64_t pos1, pos2, pos3; +#ifdef WEBP_EXPERIMENTAL_FEATURES + const int need_extensions = enc->use_layer_; +#endif + + pos1 = VP8BitWriterPos(bw); + VP8BitWriterInit(bw, mb_size * 7 / 8); // ~7 bits per macroblock +#ifdef WEBP_EXPERIMENTAL_FEATURES + VP8PutBitUniform(bw, need_extensions); // extensions +#else + VP8PutBitUniform(bw, 0); // colorspace +#endif + VP8PutBitUniform(bw, 0); // clamp type + + PutSegmentHeader(bw, enc); + PutFilterHeader(bw, &enc->filter_hdr_); + VP8PutValue(bw, enc->config_->partitions, 2); + PutQuant(bw, enc); + VP8PutBitUniform(bw, 0); // no proba update + VP8WriteProbas(bw, &enc->proba_); + pos2 = VP8BitWriterPos(bw); + VP8CodeIntraModes(enc); + VP8BitWriterFinish(bw); + +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (need_extensions && !WriteExtensions(enc)) { + return 0; + } +#endif + + pos3 = VP8BitWriterPos(bw); + + if (enc->pic_->stats) { + enc->pic_->stats->header_bytes[0] = (int)((pos2 - pos1 + 7) >> 3); + enc->pic_->stats->header_bytes[1] = (int)((pos3 - pos2 + 7) >> 3); + enc->pic_->stats->alpha_data_size = (int)enc->alpha_data_size_; + enc->pic_->stats->layer_data_size = (int)enc->layer_data_size_; + } + return !bw->error_; +} + +void VP8EncFreeBitWriters(VP8Encoder* const enc) { + int p; + VP8BitWriterWipeOut(&enc->bw_); + for (p = 0; p < enc->num_parts_; ++p) { + VP8BitWriterWipeOut(enc->parts_ + p); + } +} + +int VP8EncWrite(VP8Encoder* const enc) { + WebPPicture* const pic = enc->pic_; + VP8BitWriter* const bw = &enc->bw_; + const int task_percent = 19; + const int percent_per_part = task_percent / enc->num_parts_; + const int final_percent = enc->percent_ + task_percent; + int ok = 0; + size_t vp8_size, pad, riff_size; + int p; + + // Partition #0 with header and partition sizes + ok = !!GeneratePartition0(enc); + + // Compute VP8 size + vp8_size = VP8_FRAME_HEADER_SIZE + + VP8BitWriterSize(bw) + + 3 * (enc->num_parts_ - 1); + for (p = 0; p < enc->num_parts_; ++p) { + vp8_size += VP8BitWriterSize(enc->parts_ + p); + } + pad = vp8_size & 1; + vp8_size += pad; + + // Compute RIFF size + // At the minimum it is: "WEBPVP8 nnnn" + VP8 data size. + riff_size = TAG_SIZE + CHUNK_HEADER_SIZE + vp8_size; + if (IsVP8XNeeded(enc)) { // Add size for: VP8X header + data. + riff_size += CHUNK_HEADER_SIZE + VP8X_CHUNK_SIZE; + } + if (enc->has_alpha_) { // Add size for: ALPH header + data. + const uint32_t padded_alpha_size = enc->alpha_data_size_ + + (enc->alpha_data_size_ & 1); + riff_size += CHUNK_HEADER_SIZE + padded_alpha_size; + } + // Sanity check. + if (riff_size > 0xfffffffeU) { + return WebPEncodingSetError(pic, VP8_ENC_ERROR_FILE_TOO_BIG); + } + + // Emit headers and partition #0 + { + const uint8_t* const part0 = VP8BitWriterBuf(bw); + const size_t size0 = VP8BitWriterSize(bw); + ok = ok && PutWebPHeaders(enc, size0, vp8_size, riff_size) + && pic->writer(part0, size0, pic) + && EmitPartitionsSize(enc, pic); + VP8BitWriterWipeOut(bw); // will free the internal buffer. + } + + // Token partitions + for (p = 0; p < enc->num_parts_; ++p) { + const uint8_t* const buf = VP8BitWriterBuf(enc->parts_ + p); + const size_t size = VP8BitWriterSize(enc->parts_ + p); + if (size) + ok = ok && pic->writer(buf, size, pic); + VP8BitWriterWipeOut(enc->parts_ + p); // will free the internal buffer. + ok = ok && WebPReportProgress(pic, enc->percent_ + percent_per_part, + &enc->percent_); + } + + // Padding byte + if (ok && pad) { + ok = PutPaddingByte(pic); + } + + enc->coded_size_ = (int)(CHUNK_HEADER_SIZE + riff_size); + ok = ok && WebPReportProgress(pic, final_percent, &enc->percent_); + return ok; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/tree.c b/drivers/webpold/enc/tree.c new file mode 100644 index 0000000000..8b25e5e488 --- /dev/null +++ b/drivers/webpold/enc/tree.c @@ -0,0 +1,510 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Token probabilities +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./vp8enci.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Default probabilities + +// Paragraph 13.5 +const uint8_t + VP8CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { + // genereated using vp8_default_coef_probs() in entropy.c:129 + { { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } + }, + { { 253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128 }, + { 189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128 }, + { 106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128 } + }, + { { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128 }, + { 181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128 }, + { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128 }, + }, + { { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128 }, + { 184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128 }, + { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128 }, + }, + { { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128 }, + { 170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128 }, + { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128 } + }, + { { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128 }, + { 207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128 }, + { 102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128 } + }, + { { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128 }, + { 177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128 }, + { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128 } + }, + { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } + } + }, + { { { 198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62 }, + { 131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1 }, + { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128 } + }, + { { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128 }, + { 184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128 }, + { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128 } + }, + { { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128 }, + { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128 }, + { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128 } + }, + { { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128 }, + { 109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128 }, + { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128 } + }, + { { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128 }, + { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128 }, + { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128 } + }, + { { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128 }, + { 124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128 }, + { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128 } + }, + { { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128 }, + { 121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128 }, + { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128 } + }, + { { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128 }, + { 203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128 } + } + }, + { { { 253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128 }, + { 175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128 }, + { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128 } + }, + { { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128 }, + { 239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128 }, + { 155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128 } + }, + { { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128 }, + { 201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128 }, + { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128 } + }, + { { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128 }, + { 141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128 } + }, + { { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128 }, + { 149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } + }, + { { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128 } + }, + { { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128 }, + { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128 } + }, + { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } + } + }, + { { { 202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255 }, + { 126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128 }, + { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128 } + }, + { { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128 }, + { 166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128 }, + { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128 } + }, + { { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128 }, + { 124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128 }, + { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128 } + }, + { { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128 }, + { 149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128 }, + { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128 } + }, + { { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128 }, + { 123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128 }, + { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128 } + }, + { { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128 }, + { 168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128 }, + { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128 } + }, + { { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128 }, + { 141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128 }, + { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128 } + }, + { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, + { 238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } + } + } +}; + +void VP8DefaultProbas(VP8Encoder* const enc) { + VP8Proba* const probas = &enc->proba_; + probas->use_skip_proba_ = 0; + memset(probas->segments_, 255u, sizeof(probas->segments_)); + memcpy(probas->coeffs_, VP8CoeffsProba0, sizeof(VP8CoeffsProba0)); + // Note: we could hard-code the level_costs_ corresponding to VP8CoeffsProba0, + // but that's ~11k of static data. Better call VP8CalculateLevelCosts() later. + probas->dirty_ = 1; +} + +// Paragraph 11.5. 900bytes. +static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = { + { { 231, 120, 48, 89, 115, 113, 120, 152, 112 }, + { 152, 179, 64, 126, 170, 118, 46, 70, 95 }, + { 175, 69, 143, 80, 85, 82, 72, 155, 103 }, + { 56, 58, 10, 171, 218, 189, 17, 13, 152 }, + { 114, 26, 17, 163, 44, 195, 21, 10, 173 }, + { 121, 24, 80, 195, 26, 62, 44, 64, 85 }, + { 144, 71, 10, 38, 171, 213, 144, 34, 26 }, + { 170, 46, 55, 19, 136, 160, 33, 206, 71 }, + { 63, 20, 8, 114, 114, 208, 12, 9, 226 }, + { 81, 40, 11, 96, 182, 84, 29, 16, 36 } }, + { { 134, 183, 89, 137, 98, 101, 106, 165, 148 }, + { 72, 187, 100, 130, 157, 111, 32, 75, 80 }, + { 66, 102, 167, 99, 74, 62, 40, 234, 128 }, + { 41, 53, 9, 178, 241, 141, 26, 8, 107 }, + { 74, 43, 26, 146, 73, 166, 49, 23, 157 }, + { 65, 38, 105, 160, 51, 52, 31, 115, 128 }, + { 104, 79, 12, 27, 217, 255, 87, 17, 7 }, + { 87, 68, 71, 44, 114, 51, 15, 186, 23 }, + { 47, 41, 14, 110, 182, 183, 21, 17, 194 }, + { 66, 45, 25, 102, 197, 189, 23, 18, 22 } }, + { { 88, 88, 147, 150, 42, 46, 45, 196, 205 }, + { 43, 97, 183, 117, 85, 38, 35, 179, 61 }, + { 39, 53, 200, 87, 26, 21, 43, 232, 171 }, + { 56, 34, 51, 104, 114, 102, 29, 93, 77 }, + { 39, 28, 85, 171, 58, 165, 90, 98, 64 }, + { 34, 22, 116, 206, 23, 34, 43, 166, 73 }, + { 107, 54, 32, 26, 51, 1, 81, 43, 31 }, + { 68, 25, 106, 22, 64, 171, 36, 225, 114 }, + { 34, 19, 21, 102, 132, 188, 16, 76, 124 }, + { 62, 18, 78, 95, 85, 57, 50, 48, 51 } }, + { { 193, 101, 35, 159, 215, 111, 89, 46, 111 }, + { 60, 148, 31, 172, 219, 228, 21, 18, 111 }, + { 112, 113, 77, 85, 179, 255, 38, 120, 114 }, + { 40, 42, 1, 196, 245, 209, 10, 25, 109 }, + { 88, 43, 29, 140, 166, 213, 37, 43, 154 }, + { 61, 63, 30, 155, 67, 45, 68, 1, 209 }, + { 100, 80, 8, 43, 154, 1, 51, 26, 71 }, + { 142, 78, 78, 16, 255, 128, 34, 197, 171 }, + { 41, 40, 5, 102, 211, 183, 4, 1, 221 }, + { 51, 50, 17, 168, 209, 192, 23, 25, 82 } }, + { { 138, 31, 36, 171, 27, 166, 38, 44, 229 }, + { 67, 87, 58, 169, 82, 115, 26, 59, 179 }, + { 63, 59, 90, 180, 59, 166, 93, 73, 154 }, + { 40, 40, 21, 116, 143, 209, 34, 39, 175 }, + { 47, 15, 16, 183, 34, 223, 49, 45, 183 }, + { 46, 17, 33, 183, 6, 98, 15, 32, 183 }, + { 57, 46, 22, 24, 128, 1, 54, 17, 37 }, + { 65, 32, 73, 115, 28, 128, 23, 128, 205 }, + { 40, 3, 9, 115, 51, 192, 18, 6, 223 }, + { 87, 37, 9, 115, 59, 77, 64, 21, 47 } }, + { { 104, 55, 44, 218, 9, 54, 53, 130, 226 }, + { 64, 90, 70, 205, 40, 41, 23, 26, 57 }, + { 54, 57, 112, 184, 5, 41, 38, 166, 213 }, + { 30, 34, 26, 133, 152, 116, 10, 32, 134 }, + { 39, 19, 53, 221, 26, 114, 32, 73, 255 }, + { 31, 9, 65, 234, 2, 15, 1, 118, 73 }, + { 75, 32, 12, 51, 192, 255, 160, 43, 51 }, + { 88, 31, 35, 67, 102, 85, 55, 186, 85 }, + { 56, 21, 23, 111, 59, 205, 45, 37, 192 }, + { 55, 38, 70, 124, 73, 102, 1, 34, 98 } }, + { { 125, 98, 42, 88, 104, 85, 117, 175, 82 }, + { 95, 84, 53, 89, 128, 100, 113, 101, 45 }, + { 75, 79, 123, 47, 51, 128, 81, 171, 1 }, + { 57, 17, 5, 71, 102, 57, 53, 41, 49 }, + { 38, 33, 13, 121, 57, 73, 26, 1, 85 }, + { 41, 10, 67, 138, 77, 110, 90, 47, 114 }, + { 115, 21, 2, 10, 102, 255, 166, 23, 6 }, + { 101, 29, 16, 10, 85, 128, 101, 196, 26 }, + { 57, 18, 10, 102, 102, 213, 34, 20, 43 }, + { 117, 20, 15, 36, 163, 128, 68, 1, 26 } }, + { { 102, 61, 71, 37, 34, 53, 31, 243, 192 }, + { 69, 60, 71, 38, 73, 119, 28, 222, 37 }, + { 68, 45, 128, 34, 1, 47, 11, 245, 171 }, + { 62, 17, 19, 70, 146, 85, 55, 62, 70 }, + { 37, 43, 37, 154, 100, 163, 85, 160, 1 }, + { 63, 9, 92, 136, 28, 64, 32, 201, 85 }, + { 75, 15, 9, 9, 64, 255, 184, 119, 16 }, + { 86, 6, 28, 5, 64, 255, 25, 248, 1 }, + { 56, 8, 17, 132, 137, 255, 55, 116, 128 }, + { 58, 15, 20, 82, 135, 57, 26, 121, 40 } }, + { { 164, 50, 31, 137, 154, 133, 25, 35, 218 }, + { 51, 103, 44, 131, 131, 123, 31, 6, 158 }, + { 86, 40, 64, 135, 148, 224, 45, 183, 128 }, + { 22, 26, 17, 131, 240, 154, 14, 1, 209 }, + { 45, 16, 21, 91, 64, 222, 7, 1, 197 }, + { 56, 21, 39, 155, 60, 138, 23, 102, 213 }, + { 83, 12, 13, 54, 192, 255, 68, 47, 28 }, + { 85, 26, 85, 85, 128, 128, 32, 146, 171 }, + { 18, 11, 7, 63, 144, 171, 4, 4, 246 }, + { 35, 27, 10, 146, 174, 171, 12, 26, 128 } }, + { { 190, 80, 35, 99, 180, 80, 126, 54, 45 }, + { 85, 126, 47, 87, 176, 51, 41, 20, 32 }, + { 101, 75, 128, 139, 118, 146, 116, 128, 85 }, + { 56, 41, 15, 176, 236, 85, 37, 9, 62 }, + { 71, 30, 17, 119, 118, 255, 17, 18, 138 }, + { 101, 38, 60, 138, 55, 70, 43, 26, 142 }, + { 146, 36, 19, 30, 171, 255, 97, 27, 20 }, + { 138, 45, 61, 62, 219, 1, 81, 188, 64 }, + { 32, 41, 20, 117, 151, 142, 20, 21, 163 }, + { 112, 19, 12, 61, 195, 128, 48, 4, 24 } } +}; + +static int PutI4Mode(VP8BitWriter* const bw, int mode, + const uint8_t* const prob) { + if (VP8PutBit(bw, mode != B_DC_PRED, prob[0])) { + if (VP8PutBit(bw, mode != B_TM_PRED, prob[1])) { + if (VP8PutBit(bw, mode != B_VE_PRED, prob[2])) { + if (!VP8PutBit(bw, mode >= B_LD_PRED, prob[3])) { + if (VP8PutBit(bw, mode != B_HE_PRED, prob[4])) { + VP8PutBit(bw, mode != B_RD_PRED, prob[5]); + } + } else { + if (VP8PutBit(bw, mode != B_LD_PRED, prob[6])) { + if (VP8PutBit(bw, mode != B_VL_PRED, prob[7])) { + VP8PutBit(bw, mode != B_HD_PRED, prob[8]); + } + } + } + } + } + } + return mode; +} + +static void PutI16Mode(VP8BitWriter* const bw, int mode) { + if (VP8PutBit(bw, (mode == TM_PRED || mode == H_PRED), 156)) { + VP8PutBit(bw, mode == TM_PRED, 128); // TM or HE + } else { + VP8PutBit(bw, mode == V_PRED, 163); // VE or DC + } +} + +static void PutUVMode(VP8BitWriter* const bw, int uv_mode) { + if (VP8PutBit(bw, uv_mode != DC_PRED, 142)) { + if (VP8PutBit(bw, uv_mode != V_PRED, 114)) { + VP8PutBit(bw, uv_mode != H_PRED, 183); // else: TM_PRED + } + } +} + +static void PutSegment(VP8BitWriter* const bw, int s, const uint8_t* p) { + if (VP8PutBit(bw, s >= 2, p[0])) p += 1; + VP8PutBit(bw, s & 1, p[1]); +} + +void VP8CodeIntraModes(VP8Encoder* const enc) { + VP8BitWriter* const bw = &enc->bw_; + VP8EncIterator it; + VP8IteratorInit(enc, &it); + do { + const VP8MBInfo* mb = it.mb_; + const uint8_t* preds = it.preds_; + if (enc->segment_hdr_.update_map_) { + PutSegment(bw, mb->segment_, enc->proba_.segments_); + } + if (enc->proba_.use_skip_proba_) { + VP8PutBit(bw, mb->skip_, enc->proba_.skip_proba_); + } + if (VP8PutBit(bw, (mb->type_ != 0), 145)) { // i16x16 + PutI16Mode(bw, preds[0]); + } else { + const int preds_w = enc->preds_w_; + const uint8_t* top_pred = preds - preds_w; + int x, y; + for (y = 0; y < 4; ++y) { + int left = preds[-1]; + for (x = 0; x < 4; ++x) { + const uint8_t* const probas = kBModesProba[top_pred[x]][left]; + left = PutI4Mode(bw, preds[x], probas); + } + top_pred = preds; + preds += preds_w; + } + } + PutUVMode(bw, mb->uv_mode_); + } while (VP8IteratorNext(&it, 0)); +} + +//------------------------------------------------------------------------------ +// Paragraph 13 + +const uint8_t + VP8CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { + { { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255 }, + { 250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + } + }, + { { { 217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255 }, + { 234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255 } + }, + { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + } + }, + { { { 186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255 }, + { 251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255 } + }, + { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + } + }, + { { { 248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255 }, + { 248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + }, + { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, + { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } + } + } +}; + +void VP8WriteProbas(VP8BitWriter* const bw, const VP8Proba* const probas) { + int t, b, c, p; + for (t = 0; t < NUM_TYPES; ++t) { + for (b = 0; b < NUM_BANDS; ++b) { + for (c = 0; c < NUM_CTX; ++c) { + for (p = 0; p < NUM_PROBAS; ++p) { + const uint8_t p0 = probas->coeffs_[t][b][c][p]; + const int update = (p0 != VP8CoeffsProba0[t][b][c][p]); + if (VP8PutBit(bw, update, VP8CoeffsUpdateProba[t][b][c][p])) { + VP8PutValue(bw, p0, 8); + } + } + } + } + } + if (VP8PutBitUniform(bw, probas->use_skip_proba_)) { + VP8PutValue(bw, probas->skip_proba_, 8); + } +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/vp8enci.h b/drivers/webpold/enc/vp8enci.h new file mode 100644 index 0000000000..936e1c18ce --- /dev/null +++ b/drivers/webpold/enc/vp8enci.h @@ -0,0 +1,525 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// WebP encoder: internal header. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_ENC_VP8ENCI_H_ +#define WEBP_ENC_VP8ENCI_H_ + +#include <string.h> // for memcpy() +#include "../encode.h" +#include "../dsp/dsp.h" +#include "../utils/bit_writer.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Various defines and enums + +// version numbers +#define ENC_MAJ_VERSION 0 +#define ENC_MIN_VERSION 2 +#define ENC_REV_VERSION 0 + +// size of histogram used by CollectHistogram. +#define MAX_COEFF_THRESH 64 + +// intra prediction modes +enum { B_DC_PRED = 0, // 4x4 modes + B_TM_PRED = 1, + B_VE_PRED = 2, + B_HE_PRED = 3, + B_RD_PRED = 4, + B_VR_PRED = 5, + B_LD_PRED = 6, + B_VL_PRED = 7, + B_HD_PRED = 8, + B_HU_PRED = 9, + NUM_BMODES = B_HU_PRED + 1 - B_DC_PRED, // = 10 + + // Luma16 or UV modes + DC_PRED = B_DC_PRED, V_PRED = B_VE_PRED, + H_PRED = B_HE_PRED, TM_PRED = B_TM_PRED + }; + +enum { NUM_MB_SEGMENTS = 4, + MAX_NUM_PARTITIONS = 8, + NUM_TYPES = 4, // 0: i16-AC, 1: i16-DC, 2:chroma-AC, 3:i4-AC + NUM_BANDS = 8, + NUM_CTX = 3, + NUM_PROBAS = 11, + MAX_LF_LEVELS = 64, // Maximum loop filter level + MAX_VARIABLE_LEVEL = 67 // last (inclusive) level with variable cost + }; + +// YUV-cache parameters. Cache is 16-pixels wide. +// The original or reconstructed samples can be accessed using VP8Scan[] +// The predicted blocks can be accessed using offsets to yuv_p_ and +// the arrays VP8*ModeOffsets[]; +// +----+ YUV Samples area. See VP8Scan[] for accessing the blocks. +// Y_OFF |YYYY| <- original samples (enc->yuv_in_) +// |YYYY| +// |YYYY| +// |YYYY| +// U_OFF |UUVV| V_OFF (=U_OFF + 8) +// |UUVV| +// +----+ +// Y_OFF |YYYY| <- compressed/decoded samples ('yuv_out_') +// |YYYY| There are two buffers like this ('yuv_out_'/'yuv_out2_') +// |YYYY| +// |YYYY| +// U_OFF |UUVV| V_OFF +// |UUVV| +// x2 (for yuv_out2_) +// +----+ Prediction area ('yuv_p_', size = PRED_SIZE) +// I16DC16 |YYYY| Intra16 predictions (16x16 block each) +// |YYYY| +// |YYYY| +// |YYYY| +// I16TM16 |YYYY| +// |YYYY| +// |YYYY| +// |YYYY| +// I16VE16 |YYYY| +// |YYYY| +// |YYYY| +// |YYYY| +// I16HE16 |YYYY| +// |YYYY| +// |YYYY| +// |YYYY| +// +----+ Chroma U/V predictions (16x8 block each) +// C8DC8 |UUVV| +// |UUVV| +// C8TM8 |UUVV| +// |UUVV| +// C8VE8 |UUVV| +// |UUVV| +// C8HE8 |UUVV| +// |UUVV| +// +----+ Intra 4x4 predictions (4x4 block each) +// |YYYY| I4DC4 I4TM4 I4VE4 I4HE4 +// |YYYY| I4RD4 I4VR4 I4LD4 I4VL4 +// |YY..| I4HD4 I4HU4 I4TMP +// +----+ +#define BPS 16 // this is the common stride +#define Y_SIZE (BPS * 16) +#define UV_SIZE (BPS * 8) +#define YUV_SIZE (Y_SIZE + UV_SIZE) +#define PRED_SIZE (6 * 16 * BPS + 12 * BPS) +#define Y_OFF (0) +#define U_OFF (Y_SIZE) +#define V_OFF (U_OFF + 8) +#define ALIGN_CST 15 +#define DO_ALIGN(PTR) ((uintptr_t)((PTR) + ALIGN_CST) & ~ALIGN_CST) + +extern const int VP8Scan[16 + 4 + 4]; // in quant.c +extern const int VP8UVModeOffsets[4]; // in analyze.c +extern const int VP8I16ModeOffsets[4]; +extern const int VP8I4ModeOffsets[NUM_BMODES]; + +// Layout of prediction blocks +// intra 16x16 +#define I16DC16 (0 * 16 * BPS) +#define I16TM16 (1 * 16 * BPS) +#define I16VE16 (2 * 16 * BPS) +#define I16HE16 (3 * 16 * BPS) +// chroma 8x8, two U/V blocks side by side (hence: 16x8 each) +#define C8DC8 (4 * 16 * BPS) +#define C8TM8 (4 * 16 * BPS + 8 * BPS) +#define C8VE8 (5 * 16 * BPS) +#define C8HE8 (5 * 16 * BPS + 8 * BPS) +// intra 4x4 +#define I4DC4 (6 * 16 * BPS + 0) +#define I4TM4 (6 * 16 * BPS + 4) +#define I4VE4 (6 * 16 * BPS + 8) +#define I4HE4 (6 * 16 * BPS + 12) +#define I4RD4 (6 * 16 * BPS + 4 * BPS + 0) +#define I4VR4 (6 * 16 * BPS + 4 * BPS + 4) +#define I4LD4 (6 * 16 * BPS + 4 * BPS + 8) +#define I4VL4 (6 * 16 * BPS + 4 * BPS + 12) +#define I4HD4 (6 * 16 * BPS + 8 * BPS + 0) +#define I4HU4 (6 * 16 * BPS + 8 * BPS + 4) +#define I4TMP (6 * 16 * BPS + 8 * BPS + 8) + +typedef int64_t score_t; // type used for scores, rate, distortion +#define MAX_COST ((score_t)0x7fffffffffffffLL) + +#define QFIX 17 +#define BIAS(b) ((b) << (QFIX - 8)) +// Fun fact: this is the _only_ line where we're actually being lossy and +// discarding bits. +static WEBP_INLINE int QUANTDIV(int n, int iQ, int B) { + return (n * iQ + B) >> QFIX; +} +extern const uint8_t VP8Zigzag[16]; + +//------------------------------------------------------------------------------ +// Headers + +typedef uint32_t proba_t; // 16b + 16b +typedef uint8_t ProbaArray[NUM_CTX][NUM_PROBAS]; +typedef proba_t StatsArray[NUM_CTX][NUM_PROBAS]; +typedef uint16_t CostArray[NUM_CTX][MAX_VARIABLE_LEVEL + 1]; +typedef double LFStats[NUM_MB_SEGMENTS][MAX_LF_LEVELS]; // filter stats + +typedef struct VP8Encoder VP8Encoder; + +// segment features +typedef struct { + int num_segments_; // Actual number of segments. 1 segment only = unused. + int update_map_; // whether to update the segment map or not. + // must be 0 if there's only 1 segment. + int size_; // bit-cost for transmitting the segment map +} VP8SegmentHeader; + +// Struct collecting all frame-persistent probabilities. +typedef struct { + uint8_t segments_[3]; // probabilities for segment tree + uint8_t skip_proba_; // final probability of being skipped. + ProbaArray coeffs_[NUM_TYPES][NUM_BANDS]; // 924 bytes + StatsArray stats_[NUM_TYPES][NUM_BANDS]; // 4224 bytes + CostArray level_cost_[NUM_TYPES][NUM_BANDS]; // 11.4k + int dirty_; // if true, need to call VP8CalculateLevelCosts() + int use_skip_proba_; // Note: we always use skip_proba for now. + int nb_skip_; // number of skipped blocks +} VP8Proba; + +// Filter parameters. Not actually used in the code (we don't perform +// the in-loop filtering), but filled from user's config +typedef struct { + int simple_; // filtering type: 0=complex, 1=simple + int level_; // base filter level [0..63] + int sharpness_; // [0..7] + int i4x4_lf_delta_; // delta filter level for i4x4 relative to i16x16 +} VP8FilterHeader; + +//------------------------------------------------------------------------------ +// Informations about the macroblocks. + +typedef struct { + // block type + unsigned int type_:2; // 0=i4x4, 1=i16x16 + unsigned int uv_mode_:2; + unsigned int skip_:1; + unsigned int segment_:2; + uint8_t alpha_; // quantization-susceptibility +} VP8MBInfo; + +typedef struct VP8Matrix { + uint16_t q_[16]; // quantizer steps + uint16_t iq_[16]; // reciprocals, fixed point. + uint16_t bias_[16]; // rounding bias + uint16_t zthresh_[16]; // value under which a coefficient is zeroed + uint16_t sharpen_[16]; // frequency boosters for slight sharpening +} VP8Matrix; + +typedef struct { + VP8Matrix y1_, y2_, uv_; // quantization matrices + int alpha_; // quant-susceptibility, range [-127,127]. Zero is neutral. + // Lower values indicate a lower risk of blurriness. + int beta_; // filter-susceptibility, range [0,255]. + int quant_; // final segment quantizer. + int fstrength_; // final in-loop filtering strength + // reactivities + int lambda_i16_, lambda_i4_, lambda_uv_; + int lambda_mode_, lambda_trellis_, tlambda_; + int lambda_trellis_i16_, lambda_trellis_i4_, lambda_trellis_uv_; +} VP8SegmentInfo; + +// Handy transcient struct to accumulate score and info during RD-optimization +// and mode evaluation. +typedef struct { + score_t D, SD, R, score; // Distortion, spectral distortion, rate, score. + int16_t y_dc_levels[16]; // Quantized levels for luma-DC, luma-AC, chroma. + int16_t y_ac_levels[16][16]; + int16_t uv_levels[4 + 4][16]; + int mode_i16; // mode number for intra16 prediction + uint8_t modes_i4[16]; // mode numbers for intra4 predictions + int mode_uv; // mode number of chroma prediction + uint32_t nz; // non-zero blocks +} VP8ModeScore; + +// Iterator structure to iterate through macroblocks, pointing to the +// right neighbouring data (samples, predictions, contexts, ...) +typedef struct { + int x_, y_; // current macroblock + int y_offset_, uv_offset_; // offset to the luma / chroma planes + int y_stride_, uv_stride_; // respective strides + uint8_t* yuv_in_; // borrowed from enc_ (for now) + uint8_t* yuv_out_; // '' + uint8_t* yuv_out2_; // '' + uint8_t* yuv_p_; // '' + VP8Encoder* enc_; // back-pointer + VP8MBInfo* mb_; // current macroblock + VP8BitWriter* bw_; // current bit-writer + uint8_t* preds_; // intra mode predictors (4x4 blocks) + uint32_t* nz_; // non-zero pattern + uint8_t i4_boundary_[37]; // 32+5 boundary samples needed by intra4x4 + uint8_t* i4_top_; // pointer to the current top boundary sample + int i4_; // current intra4x4 mode being tested + int top_nz_[9]; // top-non-zero context. + int left_nz_[9]; // left-non-zero. left_nz[8] is independent. + uint64_t bit_count_[4][3]; // bit counters for coded levels. + uint64_t luma_bits_; // macroblock bit-cost for luma + uint64_t uv_bits_; // macroblock bit-cost for chroma + LFStats* lf_stats_; // filter stats (borrowed from enc_) + int do_trellis_; // if true, perform extra level optimisation + int done_; // true when scan is finished + int percent0_; // saved initial progress percent +} VP8EncIterator; + + // in iterator.c +// must be called first. +void VP8IteratorInit(VP8Encoder* const enc, VP8EncIterator* const it); +// restart a scan. +void VP8IteratorReset(VP8EncIterator* const it); +// import samples from source +void VP8IteratorImport(const VP8EncIterator* const it); +// export decimated samples +void VP8IteratorExport(const VP8EncIterator* const it); +// go to next macroblock. Returns !done_. If *block_to_save is non-null, will +// save the boundary values to top_/left_ arrays. block_to_save can be +// it->yuv_out_ or it->yuv_in_. +int VP8IteratorNext(VP8EncIterator* const it, + const uint8_t* const block_to_save); +// Report progression based on macroblock rows. Return 0 for user-abort request. +int VP8IteratorProgress(const VP8EncIterator* const it, + int final_delta_percent); +// Intra4x4 iterations +void VP8IteratorStartI4(VP8EncIterator* const it); +// returns true if not done. +int VP8IteratorRotateI4(VP8EncIterator* const it, + const uint8_t* const yuv_out); + +// Non-zero context setup/teardown +void VP8IteratorNzToBytes(VP8EncIterator* const it); +void VP8IteratorBytesToNz(VP8EncIterator* const it); + +// Helper functions to set mode properties +void VP8SetIntra16Mode(const VP8EncIterator* const it, int mode); +void VP8SetIntra4Mode(const VP8EncIterator* const it, const uint8_t* modes); +void VP8SetIntraUVMode(const VP8EncIterator* const it, int mode); +void VP8SetSkip(const VP8EncIterator* const it, int skip); +void VP8SetSegment(const VP8EncIterator* const it, int segment); + +//------------------------------------------------------------------------------ +// Paginated token buffer + +// WIP: #define USE_TOKEN_BUFFER + +#ifdef USE_TOKEN_BUFFER + +#define MAX_NUM_TOKEN 2048 + +typedef struct VP8Tokens VP8Tokens; +struct VP8Tokens { + uint16_t tokens_[MAX_NUM_TOKEN]; // bit#15: bit, bits 0..14: slot + int left_; + VP8Tokens* next_; +}; + +typedef struct { + VP8Tokens* rows_; + uint16_t* tokens_; // set to (*last_)->tokens_ + VP8Tokens** last_; + int left_; + int error_; // true in case of malloc error +} VP8TBuffer; + +void VP8TBufferInit(VP8TBuffer* const b); // initialize an empty buffer +int VP8TBufferNewPage(VP8TBuffer* const b); // allocate a new page +void VP8TBufferClear(VP8TBuffer* const b); // de-allocate memory + +int VP8EmitTokens(const VP8TBuffer* const b, VP8BitWriter* const bw, + const uint8_t* const probas); + +static WEBP_INLINE int VP8AddToken(VP8TBuffer* const b, + int bit, int proba_idx) { + if (b->left_ > 0 || VP8TBufferNewPage(b)) { + const int slot = --b->left_; + b->tokens_[slot] = (bit << 15) | proba_idx; + } + return bit; +} + +#endif // USE_TOKEN_BUFFER + +//------------------------------------------------------------------------------ +// VP8Encoder + +struct VP8Encoder { + const WebPConfig* config_; // user configuration and parameters + WebPPicture* pic_; // input / output picture + + // headers + VP8FilterHeader filter_hdr_; // filtering information + VP8SegmentHeader segment_hdr_; // segment information + + int profile_; // VP8's profile, deduced from Config. + + // dimension, in macroblock units. + int mb_w_, mb_h_; + int preds_w_; // stride of the *preds_ prediction plane (=4*mb_w + 1) + + // number of partitions (1, 2, 4 or 8 = MAX_NUM_PARTITIONS) + int num_parts_; + + // per-partition boolean decoders. + VP8BitWriter bw_; // part0 + VP8BitWriter parts_[MAX_NUM_PARTITIONS]; // token partitions + + int percent_; // for progress + + // transparency blob + int has_alpha_; + uint8_t* alpha_data_; // non-NULL if transparency is present + uint32_t alpha_data_size_; + + // enhancement layer + int use_layer_; + VP8BitWriter layer_bw_; + uint8_t* layer_data_; + size_t layer_data_size_; + + // quantization info (one set of DC/AC dequant factor per segment) + VP8SegmentInfo dqm_[NUM_MB_SEGMENTS]; + int base_quant_; // nominal quantizer value. Only used + // for relative coding of segments' quant. + int uv_alpha_; // U/V quantization susceptibility + // global offset of quantizers, shared by all segments + int dq_y1_dc_; + int dq_y2_dc_, dq_y2_ac_; + int dq_uv_dc_, dq_uv_ac_; + + // probabilities and statistics + VP8Proba proba_; + uint64_t sse_[4]; // sum of Y/U/V/A squared errors for all macroblocks + uint64_t sse_count_; // pixel count for the sse_[] stats + int coded_size_; + int residual_bytes_[3][4]; + int block_count_[3]; + + // quality/speed settings + int method_; // 0=fastest, 6=best/slowest. + int rd_opt_level_; // Deduced from method_. + int max_i4_header_bits_; // partition #0 safeness factor + + // Memory + VP8MBInfo* mb_info_; // contextual macroblock infos (mb_w_ + 1) + uint8_t* preds_; // predictions modes: (4*mb_w+1) * (4*mb_h+1) + uint32_t* nz_; // non-zero bit context: mb_w+1 + uint8_t* yuv_in_; // input samples + uint8_t* yuv_out_; // output samples + uint8_t* yuv_out2_; // secondary scratch out-buffer. swapped with yuv_out_. + uint8_t* yuv_p_; // scratch buffer for prediction + uint8_t *y_top_; // top luma samples. + uint8_t *uv_top_; // top u/v samples. + // U and V are packed into 16 pixels (8 U + 8 V) + uint8_t *y_left_; // left luma samples (adressable from index -1 to 15). + uint8_t *u_left_; // left u samples (adressable from index -1 to 7) + uint8_t *v_left_; // left v samples (adressable from index -1 to 7) + + LFStats *lf_stats_; // autofilter stats (if NULL, autofilter is off) +}; + +//------------------------------------------------------------------------------ +// internal functions. Not public. + + // in tree.c +extern const uint8_t VP8CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS]; +extern const uint8_t + VP8CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS]; +// Reset the token probabilities to their initial (default) values +void VP8DefaultProbas(VP8Encoder* const enc); +// Write the token probabilities +void VP8WriteProbas(VP8BitWriter* const bw, const VP8Proba* const probas); +// Writes the partition #0 modes (that is: all intra modes) +void VP8CodeIntraModes(VP8Encoder* const enc); + + // in syntax.c +// Generates the final bitstream by coding the partition0 and headers, +// and appending an assembly of all the pre-coded token partitions. +// Return true if everything is ok. +int VP8EncWrite(VP8Encoder* const enc); +// Release memory allocated for bit-writing in VP8EncLoop & seq. +void VP8EncFreeBitWriters(VP8Encoder* const enc); + + // in frame.c +extern const uint8_t VP8EncBands[16 + 1]; +// Form all the four Intra16x16 predictions in the yuv_p_ cache +void VP8MakeLuma16Preds(const VP8EncIterator* const it); +// Form all the four Chroma8x8 predictions in the yuv_p_ cache +void VP8MakeChroma8Preds(const VP8EncIterator* const it); +// Form all the ten Intra4x4 predictions in the yuv_p_ cache +// for the 4x4 block it->i4_ +void VP8MakeIntra4Preds(const VP8EncIterator* const it); +// Rate calculation +int VP8GetCostLuma16(VP8EncIterator* const it, const VP8ModeScore* const rd); +int VP8GetCostLuma4(VP8EncIterator* const it, const int16_t levels[16]); +int VP8GetCostUV(VP8EncIterator* const it, const VP8ModeScore* const rd); +// Main stat / coding passes +int VP8EncLoop(VP8Encoder* const enc); +int VP8StatLoop(VP8Encoder* const enc); + + // in webpenc.c +// Assign an error code to a picture. Return false for convenience. +int WebPEncodingSetError(const WebPPicture* const pic, WebPEncodingError error); +int WebPReportProgress(const WebPPicture* const pic, + int percent, int* const percent_store); + + // in analysis.c +// Main analysis loop. Decides the segmentations and complexity. +// Assigns a first guess for Intra16 and uvmode_ prediction modes. +int VP8EncAnalyze(VP8Encoder* const enc); + + // in quant.c +// Sets up segment's quantization values, base_quant_ and filter strengths. +void VP8SetSegmentParams(VP8Encoder* const enc, float quality); +// Pick best modes and fills the levels. Returns true if skipped. +int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt); + + // in alpha.c +void VP8EncInitAlpha(VP8Encoder* const enc); // initialize alpha compression +int VP8EncFinishAlpha(VP8Encoder* const enc); // finalize compressed data +void VP8EncDeleteAlpha(VP8Encoder* const enc); // delete compressed data + + // in layer.c +void VP8EncInitLayer(VP8Encoder* const enc); // init everything +void VP8EncCodeLayerBlock(VP8EncIterator* it); // code one more macroblock +int VP8EncFinishLayer(VP8Encoder* const enc); // finalize coding +void VP8EncDeleteLayer(VP8Encoder* enc); // reclaim memory + + // in filter.c + +// SSIM utils +typedef struct { + double w, xm, ym, xxm, xym, yym; +} DistoStats; +void VP8SSIMAddStats(const DistoStats* const src, DistoStats* const dst); +void VP8SSIMAccumulatePlane(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int W, int H, DistoStats* const stats); +double VP8SSIMGet(const DistoStats* const stats); +double VP8SSIMGetSquaredError(const DistoStats* const stats); + +// autofilter +void VP8InitFilter(VP8EncIterator* const it); +void VP8StoreFilterStats(VP8EncIterator* const it); +void VP8AdjustFilterStrength(VP8EncIterator* const it); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_ENC_VP8ENCI_H_ */ diff --git a/drivers/webpold/enc/vp8l.c b/drivers/webpold/enc/vp8l.c new file mode 100644 index 0000000000..f4eb6e783f --- /dev/null +++ b/drivers/webpold/enc/vp8l.c @@ -0,0 +1,1150 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// main entry for the lossless encoder. +// +// Author: Vikas Arora (vikaas.arora@gmail.com) +// + +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> + +#include "./backward_references.h" +#include "./vp8enci.h" +#include "./vp8li.h" +#include "../dsp/lossless.h" +#include "../utils/bit_writer.h" +#include "../utils/huffman_encode.h" +#include "../utils/utils.h" +#include "../format_constants.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define PALETTE_KEY_RIGHT_SHIFT 22 // Key for 1K buffer. +#define MAX_HUFF_IMAGE_SIZE (16 * 1024 * 1024) +#define MAX_COLORS_FOR_GRAPH 64 + +// ----------------------------------------------------------------------------- +// Palette + +static int CompareColors(const void* p1, const void* p2) { + const uint32_t a = *(const uint32_t*)p1; + const uint32_t b = *(const uint32_t*)p2; + return (a < b) ? -1 : (a > b) ? 1 : 0; +} + +// If number of colors in the image is less than or equal to MAX_PALETTE_SIZE, +// creates a palette and returns true, else returns false. +static int AnalyzeAndCreatePalette(const WebPPicture* const pic, + uint32_t palette[MAX_PALETTE_SIZE], + int* const palette_size) { + int i, x, y, key; + int num_colors = 0; + uint8_t in_use[MAX_PALETTE_SIZE * 4] = { 0 }; + uint32_t colors[MAX_PALETTE_SIZE * 4]; + static const uint32_t kHashMul = 0x1e35a7bd; + const uint32_t* argb = pic->argb; + const int width = pic->width; + const int height = pic->height; + uint32_t last_pix = ~argb[0]; // so we're sure that last_pix != argb[0] + + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + if (argb[x] == last_pix) { + continue; + } + last_pix = argb[x]; + key = (kHashMul * last_pix) >> PALETTE_KEY_RIGHT_SHIFT; + while (1) { + if (!in_use[key]) { + colors[key] = last_pix; + in_use[key] = 1; + ++num_colors; + if (num_colors > MAX_PALETTE_SIZE) { + return 0; + } + break; + } else if (colors[key] == last_pix) { + // The color is already there. + break; + } else { + // Some other color sits there. + // Do linear conflict resolution. + ++key; + key &= (MAX_PALETTE_SIZE * 4 - 1); // key mask for 1K buffer. + } + } + } + argb += pic->argb_stride; + } + + // TODO(skal): could we reuse in_use[] to speed up ApplyPalette()? + num_colors = 0; + for (i = 0; i < (int)(sizeof(in_use) / sizeof(in_use[0])); ++i) { + if (in_use[i]) { + palette[num_colors] = colors[i]; + ++num_colors; + } + } + + qsort(palette, num_colors, sizeof(*palette), CompareColors); + *palette_size = num_colors; + return 1; +} + +static int AnalyzeEntropy(const uint32_t* argb, + int width, int height, int argb_stride, + double* const nonpredicted_bits, + double* const predicted_bits) { + int x, y; + const uint32_t* last_line = NULL; + uint32_t last_pix = argb[0]; // so we're sure that pix_diff == 0 + + VP8LHistogram* nonpredicted = NULL; + VP8LHistogram* predicted = + (VP8LHistogram*)malloc(2 * sizeof(*predicted)); + if (predicted == NULL) return 0; + nonpredicted = predicted + 1; + + VP8LHistogramInit(predicted, 0); + VP8LHistogramInit(nonpredicted, 0); + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + const uint32_t pix = argb[x]; + const uint32_t pix_diff = VP8LSubPixels(pix, last_pix); + if (pix_diff == 0) continue; + if (last_line != NULL && pix == last_line[x]) { + continue; + } + last_pix = pix; + { + const PixOrCopy pix_token = PixOrCopyCreateLiteral(pix); + const PixOrCopy pix_diff_token = PixOrCopyCreateLiteral(pix_diff); + VP8LHistogramAddSinglePixOrCopy(nonpredicted, &pix_token); + VP8LHistogramAddSinglePixOrCopy(predicted, &pix_diff_token); + } + } + last_line = argb; + argb += argb_stride; + } + *nonpredicted_bits = VP8LHistogramEstimateBitsBulk(nonpredicted); + *predicted_bits = VP8LHistogramEstimateBitsBulk(predicted); + free(predicted); + return 1; +} + +static int VP8LEncAnalyze(VP8LEncoder* const enc, WebPImageHint image_hint) { + const WebPPicture* const pic = enc->pic_; + assert(pic != NULL && pic->argb != NULL); + + enc->use_palette_ = + AnalyzeAndCreatePalette(pic, enc->palette_, &enc->palette_size_); + + if (image_hint == WEBP_HINT_GRAPH) { + if (enc->use_palette_ && enc->palette_size_ < MAX_COLORS_FOR_GRAPH) { + enc->use_palette_ = 0; + } + } + + if (!enc->use_palette_) { + if (image_hint == WEBP_HINT_PHOTO) { + enc->use_predict_ = 1; + enc->use_cross_color_ = 1; + } else { + double non_pred_entropy, pred_entropy; + if (!AnalyzeEntropy(pic->argb, pic->width, pic->height, pic->argb_stride, + &non_pred_entropy, &pred_entropy)) { + return 0; + } + if (pred_entropy < 0.95 * non_pred_entropy) { + enc->use_predict_ = 1; + // TODO(vikasa): Observed some correlation of cross_color transform with + // predict. Need to investigate this further and add separate heuristic + // for setting use_cross_color flag. + enc->use_cross_color_ = 1; + } + } + } + + return 1; +} + +static int GetHuffBitLengthsAndCodes( + const VP8LHistogramSet* const histogram_image, + HuffmanTreeCode* const huffman_codes) { + int i, k; + int ok = 1; + uint64_t total_length_size = 0; + uint8_t* mem_buf = NULL; + const int histogram_image_size = histogram_image->size; + + // Iterate over all histograms and get the aggregate number of codes used. + for (i = 0; i < histogram_image_size; ++i) { + const VP8LHistogram* const histo = histogram_image->histograms[i]; + HuffmanTreeCode* const codes = &huffman_codes[5 * i]; + for (k = 0; k < 5; ++k) { + const int num_symbols = (k == 0) ? VP8LHistogramNumCodes(histo) + : (k == 4) ? NUM_DISTANCE_CODES + : 256; + codes[k].num_symbols = num_symbols; + total_length_size += num_symbols; + } + } + + // Allocate and Set Huffman codes. + { + uint16_t* codes; + uint8_t* lengths; + mem_buf = (uint8_t*)WebPSafeCalloc(total_length_size, + sizeof(*lengths) + sizeof(*codes)); + if (mem_buf == NULL) { + ok = 0; + goto End; + } + codes = (uint16_t*)mem_buf; + lengths = (uint8_t*)&codes[total_length_size]; + for (i = 0; i < 5 * histogram_image_size; ++i) { + const int bit_length = huffman_codes[i].num_symbols; + huffman_codes[i].codes = codes; + huffman_codes[i].code_lengths = lengths; + codes += bit_length; + lengths += bit_length; + } + } + + // Create Huffman trees. + for (i = 0; i < histogram_image_size; ++i) { + HuffmanTreeCode* const codes = &huffman_codes[5 * i]; + VP8LHistogram* const histo = histogram_image->histograms[i]; + ok = ok && VP8LCreateHuffmanTree(histo->literal_, 15, codes + 0); + ok = ok && VP8LCreateHuffmanTree(histo->red_, 15, codes + 1); + ok = ok && VP8LCreateHuffmanTree(histo->blue_, 15, codes + 2); + ok = ok && VP8LCreateHuffmanTree(histo->alpha_, 15, codes + 3); + ok = ok && VP8LCreateHuffmanTree(histo->distance_, 15, codes + 4); + } + + End: + if (!ok) free(mem_buf); + return ok; +} + +static void StoreHuffmanTreeOfHuffmanTreeToBitMask( + VP8LBitWriter* const bw, const uint8_t* code_length_bitdepth) { + // RFC 1951 will calm you down if you are worried about this funny sequence. + // This sequence is tuned from that, but more weighted for lower symbol count, + // and more spiking histograms. + static const uint8_t kStorageOrder[CODE_LENGTH_CODES] = { + 17, 18, 0, 1, 2, 3, 4, 5, 16, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 + }; + int i; + // Throw away trailing zeros: + int codes_to_store = CODE_LENGTH_CODES; + for (; codes_to_store > 4; --codes_to_store) { + if (code_length_bitdepth[kStorageOrder[codes_to_store - 1]] != 0) { + break; + } + } + VP8LWriteBits(bw, 4, codes_to_store - 4); + for (i = 0; i < codes_to_store; ++i) { + VP8LWriteBits(bw, 3, code_length_bitdepth[kStorageOrder[i]]); + } +} + +static void ClearHuffmanTreeIfOnlyOneSymbol( + HuffmanTreeCode* const huffman_code) { + int k; + int count = 0; + for (k = 0; k < huffman_code->num_symbols; ++k) { + if (huffman_code->code_lengths[k] != 0) { + ++count; + if (count > 1) return; + } + } + for (k = 0; k < huffman_code->num_symbols; ++k) { + huffman_code->code_lengths[k] = 0; + huffman_code->codes[k] = 0; + } +} + +static void StoreHuffmanTreeToBitMask( + VP8LBitWriter* const bw, + const HuffmanTreeToken* const tokens, const int num_tokens, + const HuffmanTreeCode* const huffman_code) { + int i; + for (i = 0; i < num_tokens; ++i) { + const int ix = tokens[i].code; + const int extra_bits = tokens[i].extra_bits; + VP8LWriteBits(bw, huffman_code->code_lengths[ix], huffman_code->codes[ix]); + switch (ix) { + case 16: + VP8LWriteBits(bw, 2, extra_bits); + break; + case 17: + VP8LWriteBits(bw, 3, extra_bits); + break; + case 18: + VP8LWriteBits(bw, 7, extra_bits); + break; + } + } +} + +static int StoreFullHuffmanCode(VP8LBitWriter* const bw, + const HuffmanTreeCode* const tree) { + int ok = 0; + uint8_t code_length_bitdepth[CODE_LENGTH_CODES] = { 0 }; + uint16_t code_length_bitdepth_symbols[CODE_LENGTH_CODES] = { 0 }; + const int max_tokens = tree->num_symbols; + int num_tokens; + HuffmanTreeCode huffman_code; + HuffmanTreeToken* const tokens = + (HuffmanTreeToken*)WebPSafeMalloc((uint64_t)max_tokens, sizeof(*tokens)); + if (tokens == NULL) return 0; + + huffman_code.num_symbols = CODE_LENGTH_CODES; + huffman_code.code_lengths = code_length_bitdepth; + huffman_code.codes = code_length_bitdepth_symbols; + + VP8LWriteBits(bw, 1, 0); + num_tokens = VP8LCreateCompressedHuffmanTree(tree, tokens, max_tokens); + { + int histogram[CODE_LENGTH_CODES] = { 0 }; + int i; + for (i = 0; i < num_tokens; ++i) { + ++histogram[tokens[i].code]; + } + + if (!VP8LCreateHuffmanTree(histogram, 7, &huffman_code)) { + goto End; + } + } + + StoreHuffmanTreeOfHuffmanTreeToBitMask(bw, code_length_bitdepth); + ClearHuffmanTreeIfOnlyOneSymbol(&huffman_code); + { + int trailing_zero_bits = 0; + int trimmed_length = num_tokens; + int write_trimmed_length; + int length; + int i = num_tokens; + while (i-- > 0) { + const int ix = tokens[i].code; + if (ix == 0 || ix == 17 || ix == 18) { + --trimmed_length; // discount trailing zeros + trailing_zero_bits += code_length_bitdepth[ix]; + if (ix == 17) { + trailing_zero_bits += 3; + } else if (ix == 18) { + trailing_zero_bits += 7; + } + } else { + break; + } + } + write_trimmed_length = (trimmed_length > 1 && trailing_zero_bits > 12); + length = write_trimmed_length ? trimmed_length : num_tokens; + VP8LWriteBits(bw, 1, write_trimmed_length); + if (write_trimmed_length) { + const int nbits = VP8LBitsLog2Ceiling(trimmed_length - 1); + const int nbitpairs = (nbits == 0) ? 1 : (nbits + 1) / 2; + VP8LWriteBits(bw, 3, nbitpairs - 1); + assert(trimmed_length >= 2); + VP8LWriteBits(bw, nbitpairs * 2, trimmed_length - 2); + } + StoreHuffmanTreeToBitMask(bw, tokens, length, &huffman_code); + } + ok = 1; + End: + free(tokens); + return ok; +} + +static int StoreHuffmanCode(VP8LBitWriter* const bw, + const HuffmanTreeCode* const huffman_code) { + int i; + int count = 0; + int symbols[2] = { 0, 0 }; + const int kMaxBits = 8; + const int kMaxSymbol = 1 << kMaxBits; + + // Check whether it's a small tree. + for (i = 0; i < huffman_code->num_symbols && count < 3; ++i) { + if (huffman_code->code_lengths[i] != 0) { + if (count < 2) symbols[count] = i; + ++count; + } + } + + if (count == 0) { // emit minimal tree for empty cases + // bits: small tree marker: 1, count-1: 0, large 8-bit code: 0, code: 0 + VP8LWriteBits(bw, 4, 0x01); + return 1; + } else if (count <= 2 && symbols[0] < kMaxSymbol && symbols[1] < kMaxSymbol) { + VP8LWriteBits(bw, 1, 1); // Small tree marker to encode 1 or 2 symbols. + VP8LWriteBits(bw, 1, count - 1); + if (symbols[0] <= 1) { + VP8LWriteBits(bw, 1, 0); // Code bit for small (1 bit) symbol value. + VP8LWriteBits(bw, 1, symbols[0]); + } else { + VP8LWriteBits(bw, 1, 1); + VP8LWriteBits(bw, 8, symbols[0]); + } + if (count == 2) { + VP8LWriteBits(bw, 8, symbols[1]); + } + return 1; + } else { + return StoreFullHuffmanCode(bw, huffman_code); + } +} + +static void WriteHuffmanCode(VP8LBitWriter* const bw, + const HuffmanTreeCode* const code, int index) { + const int depth = code->code_lengths[index]; + const int symbol = code->codes[index]; + VP8LWriteBits(bw, depth, symbol); +} + +static void StoreImageToBitMask( + VP8LBitWriter* const bw, int width, int histo_bits, + const VP8LBackwardRefs* const refs, + const uint16_t* histogram_symbols, + const HuffmanTreeCode* const huffman_codes) { + // x and y trace the position in the image. + int x = 0; + int y = 0; + const int histo_xsize = histo_bits ? VP8LSubSampleSize(width, histo_bits) : 1; + int i; + for (i = 0; i < refs->size; ++i) { + const PixOrCopy* const v = &refs->refs[i]; + const int histogram_ix = histogram_symbols[histo_bits ? + (y >> histo_bits) * histo_xsize + + (x >> histo_bits) : 0]; + const HuffmanTreeCode* const codes = huffman_codes + 5 * histogram_ix; + if (PixOrCopyIsCacheIdx(v)) { + const int code = PixOrCopyCacheIdx(v); + const int literal_ix = 256 + NUM_LENGTH_CODES + code; + WriteHuffmanCode(bw, codes, literal_ix); + } else if (PixOrCopyIsLiteral(v)) { + static const int order[] = { 1, 2, 0, 3 }; + int k; + for (k = 0; k < 4; ++k) { + const int code = PixOrCopyLiteral(v, order[k]); + WriteHuffmanCode(bw, codes + k, code); + } + } else { + int bits, n_bits; + int code, distance; + + PrefixEncode(v->len, &code, &n_bits, &bits); + WriteHuffmanCode(bw, codes, 256 + code); + VP8LWriteBits(bw, n_bits, bits); + + distance = PixOrCopyDistance(v); + PrefixEncode(distance, &code, &n_bits, &bits); + WriteHuffmanCode(bw, codes + 4, code); + VP8LWriteBits(bw, n_bits, bits); + } + x += PixOrCopyLength(v); + while (x >= width) { + x -= width; + ++y; + } + } +} + +// Special case of EncodeImageInternal() for cache-bits=0, histo_bits=31 +static int EncodeImageNoHuffman(VP8LBitWriter* const bw, + const uint32_t* const argb, + int width, int height, int quality) { + int i; + int ok = 0; + VP8LBackwardRefs refs; + HuffmanTreeCode huffman_codes[5] = { { 0, NULL, NULL } }; + const uint16_t histogram_symbols[1] = { 0 }; // only one tree, one symbol + VP8LHistogramSet* const histogram_image = VP8LAllocateHistogramSet(1, 0); + if (histogram_image == NULL) return 0; + + // Calculate backward references from ARGB image. + if (!VP8LGetBackwardReferences(width, height, argb, quality, 0, 1, &refs)) { + goto Error; + } + // Build histogram image and symbols from backward references. + VP8LHistogramStoreRefs(&refs, histogram_image->histograms[0]); + + // Create Huffman bit lengths and codes for each histogram image. + assert(histogram_image->size == 1); + if (!GetHuffBitLengthsAndCodes(histogram_image, huffman_codes)) { + goto Error; + } + + // No color cache, no Huffman image. + VP8LWriteBits(bw, 1, 0); + + // Store Huffman codes. + for (i = 0; i < 5; ++i) { + HuffmanTreeCode* const codes = &huffman_codes[i]; + if (!StoreHuffmanCode(bw, codes)) { + goto Error; + } + ClearHuffmanTreeIfOnlyOneSymbol(codes); + } + + // Store actual literals. + StoreImageToBitMask(bw, width, 0, &refs, histogram_symbols, huffman_codes); + ok = 1; + + Error: + free(histogram_image); + VP8LClearBackwardRefs(&refs); + free(huffman_codes[0].codes); + return ok; +} + +static int EncodeImageInternal(VP8LBitWriter* const bw, + const uint32_t* const argb, + int width, int height, int quality, + int cache_bits, int histogram_bits) { + int ok = 0; + const int use_2d_locality = 1; + const int use_color_cache = (cache_bits > 0); + const uint32_t histogram_image_xysize = + VP8LSubSampleSize(width, histogram_bits) * + VP8LSubSampleSize(height, histogram_bits); + VP8LHistogramSet* histogram_image = + VP8LAllocateHistogramSet(histogram_image_xysize, 0); + int histogram_image_size = 0; + size_t bit_array_size = 0; + HuffmanTreeCode* huffman_codes = NULL; + VP8LBackwardRefs refs; + uint16_t* const histogram_symbols = + (uint16_t*)WebPSafeMalloc((uint64_t)histogram_image_xysize, + sizeof(*histogram_symbols)); + assert(histogram_bits >= MIN_HUFFMAN_BITS); + assert(histogram_bits <= MAX_HUFFMAN_BITS); + if (histogram_image == NULL || histogram_symbols == NULL) goto Error; + + // Calculate backward references from ARGB image. + if (!VP8LGetBackwardReferences(width, height, argb, quality, cache_bits, + use_2d_locality, &refs)) { + goto Error; + } + // Build histogram image and symbols from backward references. + if (!VP8LGetHistoImageSymbols(width, height, &refs, + quality, histogram_bits, cache_bits, + histogram_image, + histogram_symbols)) { + goto Error; + } + // Create Huffman bit lengths and codes for each histogram image. + histogram_image_size = histogram_image->size; + bit_array_size = 5 * histogram_image_size; + huffman_codes = (HuffmanTreeCode*)WebPSafeCalloc(bit_array_size, + sizeof(*huffman_codes)); + if (huffman_codes == NULL || + !GetHuffBitLengthsAndCodes(histogram_image, huffman_codes)) { + goto Error; + } + + // Color Cache parameters. + VP8LWriteBits(bw, 1, use_color_cache); + if (use_color_cache) { + VP8LWriteBits(bw, 4, cache_bits); + } + + // Huffman image + meta huffman. + { + const int write_histogram_image = (histogram_image_size > 1); + VP8LWriteBits(bw, 1, write_histogram_image); + if (write_histogram_image) { + uint32_t* const histogram_argb = + (uint32_t*)WebPSafeMalloc((uint64_t)histogram_image_xysize, + sizeof(*histogram_argb)); + int max_index = 0; + uint32_t i; + if (histogram_argb == NULL) goto Error; + for (i = 0; i < histogram_image_xysize; ++i) { + const int index = histogram_symbols[i] & 0xffff; + histogram_argb[i] = 0xff000000 | (index << 8); + if (index >= max_index) { + max_index = index + 1; + } + } + histogram_image_size = max_index; + + VP8LWriteBits(bw, 3, histogram_bits - 2); + ok = EncodeImageNoHuffman(bw, histogram_argb, + VP8LSubSampleSize(width, histogram_bits), + VP8LSubSampleSize(height, histogram_bits), + quality); + free(histogram_argb); + if (!ok) goto Error; + } + } + + // Store Huffman codes. + { + int i; + for (i = 0; i < 5 * histogram_image_size; ++i) { + HuffmanTreeCode* const codes = &huffman_codes[i]; + if (!StoreHuffmanCode(bw, codes)) goto Error; + ClearHuffmanTreeIfOnlyOneSymbol(codes); + } + } + // Free combined histograms. + free(histogram_image); + histogram_image = NULL; + + // Store actual literals. + StoreImageToBitMask(bw, width, histogram_bits, &refs, + histogram_symbols, huffman_codes); + ok = 1; + + Error: + if (!ok) free(histogram_image); + + VP8LClearBackwardRefs(&refs); + if (huffman_codes != NULL) { + free(huffman_codes->codes); + free(huffman_codes); + } + free(histogram_symbols); + return ok; +} + +// ----------------------------------------------------------------------------- +// Transforms + +// Check if it would be a good idea to subtract green from red and blue. We +// only impact entropy in red/blue components, don't bother to look at others. +static int EvalAndApplySubtractGreen(VP8LEncoder* const enc, + int width, int height, + VP8LBitWriter* const bw) { + if (!enc->use_palette_) { + int i; + const uint32_t* const argb = enc->argb_; + double bit_cost_before, bit_cost_after; + VP8LHistogram* const histo = (VP8LHistogram*)malloc(sizeof(*histo)); + if (histo == NULL) return 0; + + VP8LHistogramInit(histo, 1); + for (i = 0; i < width * height; ++i) { + const uint32_t c = argb[i]; + ++histo->red_[(c >> 16) & 0xff]; + ++histo->blue_[(c >> 0) & 0xff]; + } + bit_cost_before = VP8LHistogramEstimateBits(histo); + + VP8LHistogramInit(histo, 1); + for (i = 0; i < width * height; ++i) { + const uint32_t c = argb[i]; + const int green = (c >> 8) & 0xff; + ++histo->red_[((c >> 16) - green) & 0xff]; + ++histo->blue_[((c >> 0) - green) & 0xff]; + } + bit_cost_after = VP8LHistogramEstimateBits(histo); + free(histo); + + // Check if subtracting green yields low entropy. + enc->use_subtract_green_ = (bit_cost_after < bit_cost_before); + if (enc->use_subtract_green_) { + VP8LWriteBits(bw, 1, TRANSFORM_PRESENT); + VP8LWriteBits(bw, 2, SUBTRACT_GREEN); + VP8LSubtractGreenFromBlueAndRed(enc->argb_, width * height); + } + } + return 1; +} + +static int ApplyPredictFilter(const VP8LEncoder* const enc, + int width, int height, int quality, + VP8LBitWriter* const bw) { + const int pred_bits = enc->transform_bits_; + const int transform_width = VP8LSubSampleSize(width, pred_bits); + const int transform_height = VP8LSubSampleSize(height, pred_bits); + + VP8LResidualImage(width, height, pred_bits, enc->argb_, enc->argb_scratch_, + enc->transform_data_); + VP8LWriteBits(bw, 1, TRANSFORM_PRESENT); + VP8LWriteBits(bw, 2, PREDICTOR_TRANSFORM); + assert(pred_bits >= 2); + VP8LWriteBits(bw, 3, pred_bits - 2); + if (!EncodeImageNoHuffman(bw, enc->transform_data_, + transform_width, transform_height, quality)) { + return 0; + } + return 1; +} + +static int ApplyCrossColorFilter(const VP8LEncoder* const enc, + int width, int height, int quality, + VP8LBitWriter* const bw) { + const int ccolor_transform_bits = enc->transform_bits_; + const int transform_width = VP8LSubSampleSize(width, ccolor_transform_bits); + const int transform_height = VP8LSubSampleSize(height, ccolor_transform_bits); + const int step = (quality == 0) ? 32 : 8; + + VP8LColorSpaceTransform(width, height, ccolor_transform_bits, step, + enc->argb_, enc->transform_data_); + VP8LWriteBits(bw, 1, TRANSFORM_PRESENT); + VP8LWriteBits(bw, 2, CROSS_COLOR_TRANSFORM); + assert(ccolor_transform_bits >= 2); + VP8LWriteBits(bw, 3, ccolor_transform_bits - 2); + if (!EncodeImageNoHuffman(bw, enc->transform_data_, + transform_width, transform_height, quality)) { + return 0; + } + return 1; +} + +// ----------------------------------------------------------------------------- + +static void PutLE32(uint8_t* const data, uint32_t val) { + data[0] = (val >> 0) & 0xff; + data[1] = (val >> 8) & 0xff; + data[2] = (val >> 16) & 0xff; + data[3] = (val >> 24) & 0xff; +} + +static WebPEncodingError WriteRiffHeader(const WebPPicture* const pic, + size_t riff_size, size_t vp8l_size) { + uint8_t riff[RIFF_HEADER_SIZE + CHUNK_HEADER_SIZE + VP8L_SIGNATURE_SIZE] = { + 'R', 'I', 'F', 'F', 0, 0, 0, 0, 'W', 'E', 'B', 'P', + 'V', 'P', '8', 'L', 0, 0, 0, 0, VP8L_MAGIC_BYTE, + }; + PutLE32(riff + TAG_SIZE, (uint32_t)riff_size); + PutLE32(riff + RIFF_HEADER_SIZE + TAG_SIZE, (uint32_t)vp8l_size); + if (!pic->writer(riff, sizeof(riff), pic)) { + return VP8_ENC_ERROR_BAD_WRITE; + } + return VP8_ENC_OK; +} + +static int WriteImageSize(const WebPPicture* const pic, + VP8LBitWriter* const bw) { + const int width = pic->width - 1; + const int height = pic->height - 1; + assert(width < WEBP_MAX_DIMENSION && height < WEBP_MAX_DIMENSION); + + VP8LWriteBits(bw, VP8L_IMAGE_SIZE_BITS, width); + VP8LWriteBits(bw, VP8L_IMAGE_SIZE_BITS, height); + return !bw->error_; +} + +static int WriteRealAlphaAndVersion(VP8LBitWriter* const bw, int has_alpha) { + VP8LWriteBits(bw, 1, has_alpha); + VP8LWriteBits(bw, VP8L_VERSION_BITS, VP8L_VERSION); + return !bw->error_; +} + +static WebPEncodingError WriteImage(const WebPPicture* const pic, + VP8LBitWriter* const bw, + size_t* const coded_size) { + WebPEncodingError err = VP8_ENC_OK; + const uint8_t* const webpll_data = VP8LBitWriterFinish(bw); + const size_t webpll_size = VP8LBitWriterNumBytes(bw); + const size_t vp8l_size = VP8L_SIGNATURE_SIZE + webpll_size; + const size_t pad = vp8l_size & 1; + const size_t riff_size = TAG_SIZE + CHUNK_HEADER_SIZE + vp8l_size + pad; + + err = WriteRiffHeader(pic, riff_size, vp8l_size); + if (err != VP8_ENC_OK) goto Error; + + if (!pic->writer(webpll_data, webpll_size, pic)) { + err = VP8_ENC_ERROR_BAD_WRITE; + goto Error; + } + + if (pad) { + const uint8_t pad_byte[1] = { 0 }; + if (!pic->writer(pad_byte, 1, pic)) { + err = VP8_ENC_ERROR_BAD_WRITE; + goto Error; + } + } + *coded_size = CHUNK_HEADER_SIZE + riff_size; + return VP8_ENC_OK; + + Error: + return err; +} + +// ----------------------------------------------------------------------------- + +// Allocates the memory for argb (W x H) buffer, 2 rows of context for +// prediction and transform data. +static WebPEncodingError AllocateTransformBuffer(VP8LEncoder* const enc, + int width, int height) { + WebPEncodingError err = VP8_ENC_OK; + const int tile_size = 1 << enc->transform_bits_; + const uint64_t image_size = width * height; + const uint64_t argb_scratch_size = tile_size * width + width; + const uint64_t transform_data_size = + (uint64_t)VP8LSubSampleSize(width, enc->transform_bits_) * + (uint64_t)VP8LSubSampleSize(height, enc->transform_bits_); + const uint64_t total_size = + image_size + argb_scratch_size + transform_data_size; + uint32_t* mem = (uint32_t*)WebPSafeMalloc(total_size, sizeof(*mem)); + if (mem == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + enc->argb_ = mem; + mem += image_size; + enc->argb_scratch_ = mem; + mem += argb_scratch_size; + enc->transform_data_ = mem; + enc->current_width_ = width; + + Error: + return err; +} + +// Bundles multiple (2, 4 or 8) pixels into a single pixel. +// Returns the new xsize. +static void BundleColorMap(const WebPPicture* const pic, + int xbits, uint32_t* bundled_argb, int xs) { + int y; + const int bit_depth = 1 << (3 - xbits); + uint32_t code = 0; + const uint32_t* argb = pic->argb; + const int width = pic->width; + const int height = pic->height; + + for (y = 0; y < height; ++y) { + int x; + for (x = 0; x < width; ++x) { + const int mask = (1 << xbits) - 1; + const int xsub = x & mask; + if (xsub == 0) { + code = 0; + } + // TODO(vikasa): simplify the bundling logic. + code |= (argb[x] & 0xff00) << (bit_depth * xsub); + bundled_argb[y * xs + (x >> xbits)] = 0xff000000 | code; + } + argb += pic->argb_stride; + } +} + +// Note: Expects "enc->palette_" to be set properly. +// Also, "enc->palette_" will be modified after this call and should not be used +// later. +static WebPEncodingError ApplyPalette(VP8LBitWriter* const bw, + VP8LEncoder* const enc, int quality) { + WebPEncodingError err = VP8_ENC_OK; + int i, x, y; + const WebPPicture* const pic = enc->pic_; + uint32_t* argb = pic->argb; + const int width = pic->width; + const int height = pic->height; + uint32_t* const palette = enc->palette_; + const int palette_size = enc->palette_size_; + + // Replace each input pixel by corresponding palette index. + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + const uint32_t pix = argb[x]; + for (i = 0; i < palette_size; ++i) { + if (pix == palette[i]) { + argb[x] = 0xff000000u | (i << 8); + break; + } + } + } + argb += pic->argb_stride; + } + + // Save palette to bitstream. + VP8LWriteBits(bw, 1, TRANSFORM_PRESENT); + VP8LWriteBits(bw, 2, COLOR_INDEXING_TRANSFORM); + assert(palette_size >= 1); + VP8LWriteBits(bw, 8, palette_size - 1); + for (i = palette_size - 1; i >= 1; --i) { + palette[i] = VP8LSubPixels(palette[i], palette[i - 1]); + } + if (!EncodeImageNoHuffman(bw, palette, palette_size, 1, quality)) { + err = VP8_ENC_ERROR_INVALID_CONFIGURATION; + goto Error; + } + + if (palette_size <= 16) { + // Image can be packed (multiple pixels per uint32_t). + int xbits = 1; + if (palette_size <= 2) { + xbits = 3; + } else if (palette_size <= 4) { + xbits = 2; + } + err = AllocateTransformBuffer(enc, VP8LSubSampleSize(width, xbits), height); + if (err != VP8_ENC_OK) goto Error; + BundleColorMap(pic, xbits, enc->argb_, enc->current_width_); + } + + Error: + return err; +} + +// ----------------------------------------------------------------------------- + +static int GetHistoBits(const WebPConfig* const config, + const WebPPicture* const pic) { + const int width = pic->width; + const int height = pic->height; + const size_t hist_size = sizeof(VP8LHistogram); + // Make tile size a function of encoding method (Range: 0 to 6). + int histo_bits = 7 - config->method; + while (1) { + const size_t huff_image_size = VP8LSubSampleSize(width, histo_bits) * + VP8LSubSampleSize(height, histo_bits) * + hist_size; + if (huff_image_size <= MAX_HUFF_IMAGE_SIZE) break; + ++histo_bits; + } + return (histo_bits < MIN_HUFFMAN_BITS) ? MIN_HUFFMAN_BITS : + (histo_bits > MAX_HUFFMAN_BITS) ? MAX_HUFFMAN_BITS : histo_bits; +} + +static void InitEncParams(VP8LEncoder* const enc) { + const WebPConfig* const config = enc->config_; + const WebPPicture* const picture = enc->pic_; + const int method = config->method; + const float quality = config->quality; + enc->transform_bits_ = (method < 4) ? 5 : (method > 4) ? 3 : 4; + enc->histo_bits_ = GetHistoBits(config, picture); + enc->cache_bits_ = (quality <= 25.f) ? 0 : 7; +} + +// ----------------------------------------------------------------------------- +// VP8LEncoder + +static VP8LEncoder* VP8LEncoderNew(const WebPConfig* const config, + const WebPPicture* const picture) { + VP8LEncoder* const enc = (VP8LEncoder*)calloc(1, sizeof(*enc)); + if (enc == NULL) { + WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); + return NULL; + } + enc->config_ = config; + enc->pic_ = picture; + return enc; +} + +static void VP8LEncoderDelete(VP8LEncoder* enc) { + free(enc->argb_); + free(enc); +} + +// ----------------------------------------------------------------------------- +// Main call + +WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, + const WebPPicture* const picture, + VP8LBitWriter* const bw) { + WebPEncodingError err = VP8_ENC_OK; + const int quality = (int)config->quality; + const int width = picture->width; + const int height = picture->height; + VP8LEncoder* const enc = VP8LEncoderNew(config, picture); + const size_t byte_position = VP8LBitWriterNumBytes(bw); + + if (enc == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + InitEncParams(enc); + + // --------------------------------------------------------------------------- + // Analyze image (entropy, num_palettes etc) + + if (!VP8LEncAnalyze(enc, config->image_hint)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + if (enc->use_palette_) { + err = ApplyPalette(bw, enc, quality); + if (err != VP8_ENC_OK) goto Error; + // Color cache is disabled for palette. + enc->cache_bits_ = 0; + } + + // In case image is not packed. + if (enc->argb_ == NULL) { + int y; + err = AllocateTransformBuffer(enc, width, height); + if (err != VP8_ENC_OK) goto Error; + for (y = 0; y < height; ++y) { + memcpy(enc->argb_ + y * width, + picture->argb + y * picture->argb_stride, + width * sizeof(*enc->argb_)); + } + enc->current_width_ = width; + } + + // --------------------------------------------------------------------------- + // Apply transforms and write transform data. + + if (!EvalAndApplySubtractGreen(enc, enc->current_width_, height, bw)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + if (enc->use_predict_) { + if (!ApplyPredictFilter(enc, enc->current_width_, height, quality, bw)) { + err = VP8_ENC_ERROR_INVALID_CONFIGURATION; + goto Error; + } + } + + if (enc->use_cross_color_) { + if (!ApplyCrossColorFilter(enc, enc->current_width_, height, quality, bw)) { + err = VP8_ENC_ERROR_INVALID_CONFIGURATION; + goto Error; + } + } + + VP8LWriteBits(bw, 1, !TRANSFORM_PRESENT); // No more transforms. + + // --------------------------------------------------------------------------- + // Estimate the color cache size. + + if (enc->cache_bits_ > 0) { + if (!VP8LCalculateEstimateForCacheSize(enc->argb_, enc->current_width_, + height, &enc->cache_bits_)) { + err = VP8_ENC_ERROR_INVALID_CONFIGURATION; + goto Error; + } + } + + // --------------------------------------------------------------------------- + // Encode and write the transformed image. + + if (!EncodeImageInternal(bw, enc->argb_, enc->current_width_, height, + quality, enc->cache_bits_, enc->histo_bits_)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + if (picture->stats != NULL) { + WebPAuxStats* const stats = picture->stats; + stats->lossless_features = 0; + if (enc->use_predict_) stats->lossless_features |= 1; + if (enc->use_cross_color_) stats->lossless_features |= 2; + if (enc->use_subtract_green_) stats->lossless_features |= 4; + if (enc->use_palette_) stats->lossless_features |= 8; + stats->histogram_bits = enc->histo_bits_; + stats->transform_bits = enc->transform_bits_; + stats->cache_bits = enc->cache_bits_; + stats->palette_size = enc->palette_size_; + stats->lossless_size = (int)(VP8LBitWriterNumBytes(bw) - byte_position); + } + + Error: + VP8LEncoderDelete(enc); + return err; +} + +int VP8LEncodeImage(const WebPConfig* const config, + const WebPPicture* const picture) { + int width, height; + int has_alpha; + size_t coded_size; + int percent = 0; + WebPEncodingError err = VP8_ENC_OK; + VP8LBitWriter bw; + + if (picture == NULL) return 0; + + if (config == NULL || picture->argb == NULL) { + err = VP8_ENC_ERROR_NULL_PARAMETER; + WebPEncodingSetError(picture, err); + return 0; + } + + width = picture->width; + height = picture->height; + if (!VP8LBitWriterInit(&bw, (width * height) >> 1)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + if (!WebPReportProgress(picture, 1, &percent)) { + UserAbort: + err = VP8_ENC_ERROR_USER_ABORT; + goto Error; + } + // Reset stats (for pure lossless coding) + if (picture->stats != NULL) { + WebPAuxStats* const stats = picture->stats; + memset(stats, 0, sizeof(*stats)); + stats->PSNR[0] = 99.f; + stats->PSNR[1] = 99.f; + stats->PSNR[2] = 99.f; + stats->PSNR[3] = 99.f; + stats->PSNR[4] = 99.f; + } + + // Write image size. + if (!WriteImageSize(picture, &bw)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + has_alpha = WebPPictureHasTransparency(picture); + // Write the non-trivial Alpha flag and lossless version. + if (!WriteRealAlphaAndVersion(&bw, has_alpha)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + if (!WebPReportProgress(picture, 5, &percent)) goto UserAbort; + + // Encode main image stream. + err = VP8LEncodeStream(config, picture, &bw); + if (err != VP8_ENC_OK) goto Error; + + // TODO(skal): have a fine-grained progress report in VP8LEncodeStream(). + if (!WebPReportProgress(picture, 90, &percent)) goto UserAbort; + + // Finish the RIFF chunk. + err = WriteImage(picture, &bw, &coded_size); + if (err != VP8_ENC_OK) goto Error; + + if (!WebPReportProgress(picture, 100, &percent)) goto UserAbort; + + // Save size. + if (picture->stats != NULL) { + picture->stats->coded_size += (int)coded_size; + picture->stats->lossless_size = (int)coded_size; + } + + if (picture->extra_info != NULL) { + const int mb_w = (width + 15) >> 4; + const int mb_h = (height + 15) >> 4; + memset(picture->extra_info, 0, mb_w * mb_h * sizeof(*picture->extra_info)); + } + + Error: + if (bw.error_) err = VP8_ENC_ERROR_OUT_OF_MEMORY; + VP8LBitWriterDestroy(&bw); + if (err != VP8_ENC_OK) { + WebPEncodingSetError(picture, err); + return 0; + } + return 1; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/enc/vp8li.h b/drivers/webpold/enc/vp8li.h new file mode 100644 index 0000000000..bb111aec33 --- /dev/null +++ b/drivers/webpold/enc/vp8li.h @@ -0,0 +1,68 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Lossless encoder: internal header. +// +// Author: Vikas Arora (vikaas.arora@gmail.com) + +#ifndef WEBP_ENC_VP8LI_H_ +#define WEBP_ENC_VP8LI_H_ + +#include "./histogram.h" +#include "../utils/bit_writer.h" +#include "../encode.h" +#include "../format_constants.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +typedef struct { + const WebPConfig* config_; // user configuration and parameters + const WebPPicture* pic_; // input picture. + + uint32_t* argb_; // Transformed argb image data. + uint32_t* argb_scratch_; // Scratch memory for argb rows + // (used for prediction). + uint32_t* transform_data_; // Scratch memory for transform data. + int current_width_; // Corresponds to packed image width. + + // Encoding parameters derived from quality parameter. + int histo_bits_; + int transform_bits_; + int cache_bits_; // If equal to 0, don't use color cache. + + // Encoding parameters derived from image characteristics. + int use_cross_color_; + int use_subtract_green_; + int use_predict_; + int use_palette_; + int palette_size_; + uint32_t palette_[MAX_PALETTE_SIZE]; +} VP8LEncoder; + +//------------------------------------------------------------------------------ +// internal functions. Not public. + +// Encodes the picture. +// Returns 0 if config or picture is NULL or picture doesn't have valid argb +// input. +int VP8LEncodeImage(const WebPConfig* const config, + const WebPPicture* const picture); + +// Encodes the main image stream using the supplied bit writer. +WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, + const WebPPicture* const picture, + VP8LBitWriter* const bw); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_ENC_VP8LI_H_ */ diff --git a/drivers/webpold/enc/webpenc.c b/drivers/webpold/enc/webpenc.c new file mode 100644 index 0000000000..3c275589fc --- /dev/null +++ b/drivers/webpold/enc/webpenc.c @@ -0,0 +1,389 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// WebP encoder: main entry point +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include <math.h> + +#include "./vp8enci.h" +#include "./vp8li.h" +#include "../utils/utils.h" + +// #define PRINT_MEMORY_INFO + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#ifdef PRINT_MEMORY_INFO +#include <stdio.h> +#endif + +//------------------------------------------------------------------------------ + +int WebPGetEncoderVersion(void) { + return (ENC_MAJ_VERSION << 16) | (ENC_MIN_VERSION << 8) | ENC_REV_VERSION; +} + +//------------------------------------------------------------------------------ +// WebPPicture +//------------------------------------------------------------------------------ + +static int DummyWriter(const uint8_t* data, size_t data_size, + const WebPPicture* const picture) { + // The following are to prevent 'unused variable' error message. + (void)data; + (void)data_size; + (void)picture; + return 1; +} + +int WebPPictureInitInternal(WebPPicture* picture, int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) { + return 0; // caller/system version mismatch! + } + if (picture != NULL) { + memset(picture, 0, sizeof(*picture)); + picture->writer = DummyWriter; + WebPEncodingSetError(picture, VP8_ENC_OK); + } + return 1; +} + +//------------------------------------------------------------------------------ +// VP8Encoder +//------------------------------------------------------------------------------ + +static void ResetSegmentHeader(VP8Encoder* const enc) { + VP8SegmentHeader* const hdr = &enc->segment_hdr_; + hdr->num_segments_ = enc->config_->segments; + hdr->update_map_ = (hdr->num_segments_ > 1); + hdr->size_ = 0; +} + +static void ResetFilterHeader(VP8Encoder* const enc) { + VP8FilterHeader* const hdr = &enc->filter_hdr_; + hdr->simple_ = 1; + hdr->level_ = 0; + hdr->sharpness_ = 0; + hdr->i4x4_lf_delta_ = 0; +} + +static void ResetBoundaryPredictions(VP8Encoder* const enc) { + // init boundary values once for all + // Note: actually, initializing the preds_[] is only needed for intra4. + int i; + uint8_t* const top = enc->preds_ - enc->preds_w_; + uint8_t* const left = enc->preds_ - 1; + for (i = -1; i < 4 * enc->mb_w_; ++i) { + top[i] = B_DC_PRED; + } + for (i = 0; i < 4 * enc->mb_h_; ++i) { + left[i * enc->preds_w_] = B_DC_PRED; + } + enc->nz_[-1] = 0; // constant +} + +// Map configured quality level to coding tools used. +//-------------+---+---+---+---+---+---+ +// Quality | 0 | 1 | 2 | 3 | 4 | 5 + +//-------------+---+---+---+---+---+---+ +// dynamic prob| ~ | x | x | x | x | x | +//-------------+---+---+---+---+---+---+ +// rd-opt modes| | | x | x | x | x | +//-------------+---+---+---+---+---+---+ +// fast i4/i16 | x | x | | | | | +//-------------+---+---+---+---+---+---+ +// rd-opt i4/16| | | x | x | x | x | +//-------------+---+---+---+---+---+---+ +// Trellis | | x | | | x | x | +//-------------+---+---+---+---+---+---+ +// full-SNS | | | | | | x | +//-------------+---+---+---+---+---+---+ + +static void MapConfigToTools(VP8Encoder* const enc) { + const int method = enc->config_->method; + const int limit = 100 - enc->config_->partition_limit; + enc->method_ = method; + enc->rd_opt_level_ = (method >= 6) ? 3 + : (method >= 5) ? 2 + : (method >= 3) ? 1 + : 0; + enc->max_i4_header_bits_ = + 256 * 16 * 16 * // upper bound: up to 16bit per 4x4 block + (limit * limit) / (100 * 100); // ... modulated with a quadratic curve. +} + +// Memory scaling with dimensions: +// memory (bytes) ~= 2.25 * w + 0.0625 * w * h +// +// Typical memory footprint (768x510 picture) +// Memory used: +// encoder: 33919 +// block cache: 2880 +// info: 3072 +// preds: 24897 +// top samples: 1623 +// non-zero: 196 +// lf-stats: 2048 +// total: 68635 +// Transcient object sizes: +// VP8EncIterator: 352 +// VP8ModeScore: 912 +// VP8SegmentInfo: 532 +// VP8Proba: 31032 +// LFStats: 2048 +// Picture size (yuv): 589824 + +static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, + WebPPicture* const picture) { + const int use_filter = + (config->filter_strength > 0) || (config->autofilter > 0); + const int mb_w = (picture->width + 15) >> 4; + const int mb_h = (picture->height + 15) >> 4; + const int preds_w = 4 * mb_w + 1; + const int preds_h = 4 * mb_h + 1; + const size_t preds_size = preds_w * preds_h * sizeof(uint8_t); + const int top_stride = mb_w * 16; + const size_t nz_size = (mb_w + 1) * sizeof(uint32_t); + const size_t cache_size = (3 * YUV_SIZE + PRED_SIZE) * sizeof(uint8_t); + const size_t info_size = mb_w * mb_h * sizeof(VP8MBInfo); + const size_t samples_size = (2 * top_stride + // top-luma/u/v + 16 + 16 + 16 + 8 + 1 + // left y/u/v + 2 * ALIGN_CST) // align all + * sizeof(uint8_t); + const size_t lf_stats_size = + config->autofilter ? sizeof(LFStats) + ALIGN_CST : 0; + VP8Encoder* enc; + uint8_t* mem; + const uint64_t size = (uint64_t)sizeof(VP8Encoder) // main struct + + ALIGN_CST // cache alignment + + cache_size // working caches + + info_size // modes info + + preds_size // prediction modes + + samples_size // top/left samples + + nz_size // coeff context bits + + lf_stats_size; // autofilter stats + +#ifdef PRINT_MEMORY_INFO + printf("===================================\n"); + printf("Memory used:\n" + " encoder: %ld\n" + " block cache: %ld\n" + " info: %ld\n" + " preds: %ld\n" + " top samples: %ld\n" + " non-zero: %ld\n" + " lf-stats: %ld\n" + " total: %ld\n", + sizeof(VP8Encoder) + ALIGN_CST, cache_size, info_size, + preds_size, samples_size, nz_size, lf_stats_size, size); + printf("Transcient object sizes:\n" + " VP8EncIterator: %ld\n" + " VP8ModeScore: %ld\n" + " VP8SegmentInfo: %ld\n" + " VP8Proba: %ld\n" + " LFStats: %ld\n", + sizeof(VP8EncIterator), sizeof(VP8ModeScore), + sizeof(VP8SegmentInfo), sizeof(VP8Proba), + sizeof(LFStats)); + printf("Picture size (yuv): %ld\n", + mb_w * mb_h * 384 * sizeof(uint8_t)); + printf("===================================\n"); +#endif + mem = (uint8_t*)WebPSafeMalloc(size, sizeof(*mem)); + if (mem == NULL) { + WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); + return NULL; + } + enc = (VP8Encoder*)mem; + mem = (uint8_t*)DO_ALIGN(mem + sizeof(*enc)); + memset(enc, 0, sizeof(*enc)); + enc->num_parts_ = 1 << config->partitions; + enc->mb_w_ = mb_w; + enc->mb_h_ = mb_h; + enc->preds_w_ = preds_w; + enc->yuv_in_ = (uint8_t*)mem; + mem += YUV_SIZE; + enc->yuv_out_ = (uint8_t*)mem; + mem += YUV_SIZE; + enc->yuv_out2_ = (uint8_t*)mem; + mem += YUV_SIZE; + enc->yuv_p_ = (uint8_t*)mem; + mem += PRED_SIZE; + enc->mb_info_ = (VP8MBInfo*)mem; + mem += info_size; + enc->preds_ = ((uint8_t*)mem) + 1 + enc->preds_w_; + mem += preds_w * preds_h * sizeof(uint8_t); + enc->nz_ = 1 + (uint32_t*)mem; + mem += nz_size; + enc->lf_stats_ = lf_stats_size ? (LFStats*)DO_ALIGN(mem) : NULL; + mem += lf_stats_size; + + // top samples (all 16-aligned) + mem = (uint8_t*)DO_ALIGN(mem); + enc->y_top_ = (uint8_t*)mem; + enc->uv_top_ = enc->y_top_ + top_stride; + mem += 2 * top_stride; + mem = (uint8_t*)DO_ALIGN(mem + 1); + enc->y_left_ = (uint8_t*)mem; + mem += 16 + 16; + enc->u_left_ = (uint8_t*)mem; + mem += 16; + enc->v_left_ = (uint8_t*)mem; + mem += 8; + + enc->config_ = config; + enc->profile_ = use_filter ? ((config->filter_type == 1) ? 0 : 1) : 2; + enc->pic_ = picture; + enc->percent_ = 0; + + MapConfigToTools(enc); + VP8EncDspInit(); + VP8DefaultProbas(enc); + ResetSegmentHeader(enc); + ResetFilterHeader(enc); + ResetBoundaryPredictions(enc); + + VP8EncInitAlpha(enc); +#ifdef WEBP_EXPERIMENTAL_FEATURES + VP8EncInitLayer(enc); +#endif + + return enc; +} + +static void DeleteVP8Encoder(VP8Encoder* enc) { + if (enc != NULL) { + VP8EncDeleteAlpha(enc); +#ifdef WEBP_EXPERIMENTAL_FEATURES + VP8EncDeleteLayer(enc); +#endif + free(enc); + } +} + +//------------------------------------------------------------------------------ + +static double GetPSNR(uint64_t err, uint64_t size) { + return err ? 10. * log10(255. * 255. * size / err) : 99.; +} + +static void FinalizePSNR(const VP8Encoder* const enc) { + WebPAuxStats* stats = enc->pic_->stats; + const uint64_t size = enc->sse_count_; + const uint64_t* const sse = enc->sse_; + stats->PSNR[0] = (float)GetPSNR(sse[0], size); + stats->PSNR[1] = (float)GetPSNR(sse[1], size / 4); + stats->PSNR[2] = (float)GetPSNR(sse[2], size / 4); + stats->PSNR[3] = (float)GetPSNR(sse[0] + sse[1] + sse[2], size * 3 / 2); + stats->PSNR[4] = (float)GetPSNR(sse[3], size); +} + +static void StoreStats(VP8Encoder* const enc) { + WebPAuxStats* const stats = enc->pic_->stats; + if (stats != NULL) { + int i, s; + for (i = 0; i < NUM_MB_SEGMENTS; ++i) { + stats->segment_level[i] = enc->dqm_[i].fstrength_; + stats->segment_quant[i] = enc->dqm_[i].quant_; + for (s = 0; s <= 2; ++s) { + stats->residual_bytes[s][i] = enc->residual_bytes_[s][i]; + } + } + FinalizePSNR(enc); + stats->coded_size = enc->coded_size_; + for (i = 0; i < 3; ++i) { + stats->block_count[i] = enc->block_count_[i]; + } + } + WebPReportProgress(enc->pic_, 100, &enc->percent_); // done! +} + +int WebPEncodingSetError(const WebPPicture* const pic, + WebPEncodingError error) { + assert((int)error < VP8_ENC_ERROR_LAST); + assert((int)error >= VP8_ENC_OK); + ((WebPPicture*)pic)->error_code = error; + return 0; +} + +int WebPReportProgress(const WebPPicture* const pic, + int percent, int* const percent_store) { + if (percent_store != NULL && percent != *percent_store) { + *percent_store = percent; + if (pic->progress_hook && !pic->progress_hook(percent, pic)) { + // user abort requested + WebPEncodingSetError(pic, VP8_ENC_ERROR_USER_ABORT); + return 0; + } + } + return 1; // ok +} +//------------------------------------------------------------------------------ + +int WebPEncode(const WebPConfig* config, WebPPicture* pic) { + int ok; + + if (pic == NULL) + return 0; + WebPEncodingSetError(pic, VP8_ENC_OK); // all ok so far + if (config == NULL) // bad params + return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); + if (!WebPValidateConfig(config)) + return WebPEncodingSetError(pic, VP8_ENC_ERROR_INVALID_CONFIGURATION); + if (pic->width <= 0 || pic->height <= 0) + return WebPEncodingSetError(pic, VP8_ENC_ERROR_BAD_DIMENSION); + if (pic->width > WEBP_MAX_DIMENSION || pic->height > WEBP_MAX_DIMENSION) + return WebPEncodingSetError(pic, VP8_ENC_ERROR_BAD_DIMENSION); + + if (pic->stats != NULL) memset(pic->stats, 0, sizeof(*pic->stats)); + + if (!config->lossless) { + VP8Encoder* enc = NULL; + if (pic->y == NULL || pic->u == NULL || pic->v == NULL) { + if (pic->argb != NULL) { + if (!WebPPictureARGBToYUVA(pic, WEBP_YUV420)) return 0; + } else { + return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); + } + } + + enc = InitVP8Encoder(config, pic); + if (enc == NULL) return 0; // pic->error is already set. + // Note: each of the tasks below account for 20% in the progress report. + ok = VP8EncAnalyze(enc) + && VP8StatLoop(enc) + && VP8EncLoop(enc) + && VP8EncFinishAlpha(enc) +#ifdef WEBP_EXPERIMENTAL_FEATURES + && VP8EncFinishLayer(enc) +#endif + && VP8EncWrite(enc); + StoreStats(enc); + if (!ok) { + VP8EncFreeBitWriters(enc); + } + DeleteVP8Encoder(enc); + } else { + if (pic->argb == NULL) + return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); + + ok = VP8LEncodeImage(config, pic); // Sets pic->error in case of problem. + } + + return ok; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/encode.h b/drivers/webpold/encode.h new file mode 100644 index 0000000000..2e37cfabe7 --- /dev/null +++ b/drivers/webpold/encode.h @@ -0,0 +1,463 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// WebP encoder: main interface +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_WEBP_ENCODE_H_ +#define WEBP_WEBP_ENCODE_H_ + +#include "./types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define WEBP_ENCODER_ABI_VERSION 0x0200 // MAJOR(8b) + MINOR(8b) + +// Return the encoder's version number, packed in hexadecimal using 8bits for +// each of major/minor/revision. E.g: v2.5.7 is 0x020507. +WEBP_EXTERN(int) WebPGetEncoderVersion(void); + +//------------------------------------------------------------------------------ +// One-stop-shop call! No questions asked: + +// Returns the size of the compressed data (pointed to by *output), or 0 if +// an error occurred. The compressed data must be released by the caller +// using the call 'free(*output)'. +// These functions compress using the lossy format, and the quality_factor +// can go from 0 (smaller output, lower quality) to 100 (best quality, +// larger output). +WEBP_EXTERN(size_t) WebPEncodeRGB(const uint8_t* rgb, + int width, int height, int stride, + float quality_factor, uint8_t** output); +WEBP_EXTERN(size_t) WebPEncodeBGR(const uint8_t* bgr, + int width, int height, int stride, + float quality_factor, uint8_t** output); +WEBP_EXTERN(size_t) WebPEncodeRGBA(const uint8_t* rgba, + int width, int height, int stride, + float quality_factor, uint8_t** output); +WEBP_EXTERN(size_t) WebPEncodeBGRA(const uint8_t* bgra, + int width, int height, int stride, + float quality_factor, uint8_t** output); + +// These functions are the equivalent of the above, but compressing in a +// lossless manner. Files are usually larger than lossy format, but will +// not suffer any compression loss. +WEBP_EXTERN(size_t) WebPEncodeLosslessRGB(const uint8_t* rgb, + int width, int height, int stride, + uint8_t** output); +WEBP_EXTERN(size_t) WebPEncodeLosslessBGR(const uint8_t* bgr, + int width, int height, int stride, + uint8_t** output); +WEBP_EXTERN(size_t) WebPEncodeLosslessRGBA(const uint8_t* rgba, + int width, int height, int stride, + uint8_t** output); +WEBP_EXTERN(size_t) WebPEncodeLosslessBGRA(const uint8_t* bgra, + int width, int height, int stride, + uint8_t** output); + +//------------------------------------------------------------------------------ +// Coding parameters + +// Image characteristics hint for the underlying encoder. +typedef enum { + WEBP_HINT_DEFAULT = 0, // default preset. + WEBP_HINT_PICTURE, // digital picture, like portrait, inner shot + WEBP_HINT_PHOTO, // outdoor photograph, with natural lighting + WEBP_HINT_GRAPH, // Discrete tone image (graph, map-tile etc). + WEBP_HINT_LAST +} WebPImageHint; + +typedef struct { + int lossless; // Lossless encoding (0=lossy(default), 1=lossless). + float quality; // between 0 (smallest file) and 100 (biggest) + int method; // quality/speed trade-off (0=fast, 6=slower-better) + + WebPImageHint image_hint; // Hint for image type (lossless only for now). + + // Parameters related to lossy compression only: + int target_size; // if non-zero, set the desired target size in bytes. + // Takes precedence over the 'compression' parameter. + float target_PSNR; // if non-zero, specifies the minimal distortion to + // try to achieve. Takes precedence over target_size. + int segments; // maximum number of segments to use, in [1..4] + int sns_strength; // Spatial Noise Shaping. 0=off, 100=maximum. + int filter_strength; // range: [0 = off .. 100 = strongest] + int filter_sharpness; // range: [0 = off .. 7 = least sharp] + int filter_type; // filtering type: 0 = simple, 1 = strong (only used + // if filter_strength > 0 or autofilter > 0) + int autofilter; // Auto adjust filter's strength [0 = off, 1 = on] + int alpha_compression; // Algorithm for encoding the alpha plane (0 = none, + // 1 = compressed with WebP lossless). Default is 1. + int alpha_filtering; // Predictive filtering method for alpha plane. + // 0: none, 1: fast, 2: best. Default if 1. + int alpha_quality; // Between 0 (smallest size) and 100 (lossless). + // Default is 100. + int pass; // number of entropy-analysis passes (in [1..10]). + + int show_compressed; // if true, export the compressed picture back. + // In-loop filtering is not applied. + int preprocessing; // preprocessing filter (0=none, 1=segment-smooth) + int partitions; // log2(number of token partitions) in [0..3]. Default + // is set to 0 for easier progressive decoding. + int partition_limit; // quality degradation allowed to fit the 512k limit + // on prediction modes coding (0: no degradation, + // 100: maximum possible degradation). + + uint32_t pad[8]; // padding for later use +} WebPConfig; + +// Enumerate some predefined settings for WebPConfig, depending on the type +// of source picture. These presets are used when calling WebPConfigPreset(). +typedef enum { + WEBP_PRESET_DEFAULT = 0, // default preset. + WEBP_PRESET_PICTURE, // digital picture, like portrait, inner shot + WEBP_PRESET_PHOTO, // outdoor photograph, with natural lighting + WEBP_PRESET_DRAWING, // hand or line drawing, with high-contrast details + WEBP_PRESET_ICON, // small-sized colorful images + WEBP_PRESET_TEXT // text-like +} WebPPreset; + +// Internal, version-checked, entry point +WEBP_EXTERN(int) WebPConfigInitInternal(WebPConfig*, WebPPreset, float, int); + +// Should always be called, to initialize a fresh WebPConfig structure before +// modification. Returns false in case of version mismatch. WebPConfigInit() +// must have succeeded before using the 'config' object. +// Note that the default values are lossless=0 and quality=75. +static WEBP_INLINE int WebPConfigInit(WebPConfig* config) { + return WebPConfigInitInternal(config, WEBP_PRESET_DEFAULT, 75.f, + WEBP_ENCODER_ABI_VERSION); +} + +// This function will initialize the configuration according to a predefined +// set of parameters (referred to by 'preset') and a given quality factor. +// This function can be called as a replacement to WebPConfigInit(). Will +// return false in case of error. +static WEBP_INLINE int WebPConfigPreset(WebPConfig* config, + WebPPreset preset, float quality) { + return WebPConfigInitInternal(config, preset, quality, + WEBP_ENCODER_ABI_VERSION); +} + +// Returns true if 'config' is non-NULL and all configuration parameters are +// within their valid ranges. +WEBP_EXTERN(int) WebPValidateConfig(const WebPConfig* config); + +//------------------------------------------------------------------------------ +// Input / Output + +typedef struct WebPPicture WebPPicture; // main structure for I/O + +// Structure for storing auxiliary statistics (mostly for lossy encoding). +typedef struct { + int coded_size; // final size + + float PSNR[5]; // peak-signal-to-noise ratio for Y/U/V/All/Alpha + int block_count[3]; // number of intra4/intra16/skipped macroblocks + int header_bytes[2]; // approximate number of bytes spent for header + // and mode-partition #0 + int residual_bytes[3][4]; // approximate number of bytes spent for + // DC/AC/uv coefficients for each (0..3) segments. + int segment_size[4]; // number of macroblocks in each segments + int segment_quant[4]; // quantizer values for each segments + int segment_level[4]; // filtering strength for each segments [0..63] + + int alpha_data_size; // size of the transparency data + int layer_data_size; // size of the enhancement layer data + + // lossless encoder statistics + uint32_t lossless_features; // bit0:predictor bit1:cross-color transform + // bit2:subtract-green bit3:color indexing + int histogram_bits; // number of precision bits of histogram + int transform_bits; // precision bits for transform + int cache_bits; // number of bits for color cache lookup + int palette_size; // number of color in palette, if used + int lossless_size; // final lossless size + + uint32_t pad[4]; // padding for later use +} WebPAuxStats; + +// Signature for output function. Should return true if writing was successful. +// data/data_size is the segment of data to write, and 'picture' is for +// reference (and so one can make use of picture->custom_ptr). +typedef int (*WebPWriterFunction)(const uint8_t* data, size_t data_size, + const WebPPicture* picture); + +// WebPMemoryWrite: a special WebPWriterFunction that writes to memory using +// the following WebPMemoryWriter object (to be set as a custom_ptr). +typedef struct { + uint8_t* mem; // final buffer (of size 'max_size', larger than 'size'). + size_t size; // final size + size_t max_size; // total capacity + uint32_t pad[1]; // padding for later use +} WebPMemoryWriter; + +// The following must be called first before any use. +WEBP_EXTERN(void) WebPMemoryWriterInit(WebPMemoryWriter* writer); + +// The custom writer to be used with WebPMemoryWriter as custom_ptr. Upon +// completion, writer.mem and writer.size will hold the coded data. +WEBP_EXTERN(int) WebPMemoryWrite(const uint8_t* data, size_t data_size, + const WebPPicture* picture); + +// Progress hook, called from time to time to report progress. It can return +// false to request an abort of the encoding process, or true otherwise if +// everything is OK. +typedef int (*WebPProgressHook)(int percent, const WebPPicture* picture); + +typedef enum { + // chroma sampling + WEBP_YUV420 = 0, // 4:2:0 + WEBP_YUV422 = 1, // 4:2:2 + WEBP_YUV444 = 2, // 4:4:4 + WEBP_YUV400 = 3, // grayscale + WEBP_CSP_UV_MASK = 3, // bit-mask to get the UV sampling factors + // alpha channel variants + WEBP_YUV420A = 4, + WEBP_YUV422A = 5, + WEBP_YUV444A = 6, + WEBP_YUV400A = 7, // grayscale + alpha + WEBP_CSP_ALPHA_BIT = 4 // bit that is set if alpha is present +} WebPEncCSP; + +// Encoding error conditions. +typedef enum { + VP8_ENC_OK = 0, + VP8_ENC_ERROR_OUT_OF_MEMORY, // memory error allocating objects + VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY, // memory error while flushing bits + VP8_ENC_ERROR_NULL_PARAMETER, // a pointer parameter is NULL + VP8_ENC_ERROR_INVALID_CONFIGURATION, // configuration is invalid + VP8_ENC_ERROR_BAD_DIMENSION, // picture has invalid width/height + VP8_ENC_ERROR_PARTITION0_OVERFLOW, // partition is bigger than 512k + VP8_ENC_ERROR_PARTITION_OVERFLOW, // partition is bigger than 16M + VP8_ENC_ERROR_BAD_WRITE, // error while flushing bytes + VP8_ENC_ERROR_FILE_TOO_BIG, // file is bigger than 4G + VP8_ENC_ERROR_USER_ABORT, // abort request by user + VP8_ENC_ERROR_LAST // list terminator. always last. +} WebPEncodingError; + +// maximum width/height allowed (inclusive), in pixels +#define WEBP_MAX_DIMENSION 16383 + +// Main exchange structure (input samples, output bytes, statistics) +struct WebPPicture { + + // INPUT + ////////////// + // Main flag for encoder selecting between ARGB or YUV input. + // It is recommended to use ARGB input (*argb, argb_stride) for lossless + // compression, and YUV input (*y, *u, *v, etc.) for lossy compression + // since these are the respective native colorspace for these formats. + int use_argb; + + // YUV input (mostly used for input to lossy compression) + WebPEncCSP colorspace; // colorspace: should be YUV420 for now (=Y'CbCr). + int width, height; // dimensions (less or equal to WEBP_MAX_DIMENSION) + uint8_t *y, *u, *v; // pointers to luma/chroma planes. + int y_stride, uv_stride; // luma/chroma strides. + uint8_t* a; // pointer to the alpha plane + int a_stride; // stride of the alpha plane + uint32_t pad1[2]; // padding for later use + + // ARGB input (mostly used for input to lossless compression) + uint32_t* argb; // Pointer to argb (32 bit) plane. + int argb_stride; // This is stride in pixels units, not bytes. + uint32_t pad2[3]; // padding for later use + + // OUTPUT + /////////////// + // Byte-emission hook, to store compressed bytes as they are ready. + WebPWriterFunction writer; // can be NULL + void* custom_ptr; // can be used by the writer. + + // map for extra information (only for lossy compression mode) + int extra_info_type; // 1: intra type, 2: segment, 3: quant + // 4: intra-16 prediction mode, + // 5: chroma prediction mode, + // 6: bit cost, 7: distortion + uint8_t* extra_info; // if not NULL, points to an array of size + // ((width + 15) / 16) * ((height + 15) / 16) that + // will be filled with a macroblock map, depending + // on extra_info_type. + + // STATS AND REPORTS + /////////////////////////// + // Pointer to side statistics (updated only if not NULL) + WebPAuxStats* stats; + + // Error code for the latest error encountered during encoding + WebPEncodingError error_code; + + // If not NULL, report progress during encoding. + WebPProgressHook progress_hook; + + void* user_data; // this field is free to be set to any value and + // used during callbacks (like progress-report e.g.). + + uint32_t pad3[3]; // padding for later use + + // Unused for now: original samples (for non-YUV420 modes) + uint8_t *u0, *v0; + int uv0_stride; + + uint32_t pad4[7]; // padding for later use + + // PRIVATE FIELDS + //////////////////// + void* memory_; // row chunk of memory for yuva planes + void* memory_argb_; // and for argb too. + void* pad5[2]; // padding for later use +}; + +// Internal, version-checked, entry point +WEBP_EXTERN(int) WebPPictureInitInternal(WebPPicture*, int); + +// Should always be called, to initialize the structure. Returns false in case +// of version mismatch. WebPPictureInit() must have succeeded before using the +// 'picture' object. +// Note that, by default, use_argb is false and colorspace is WEBP_YUV420. +static WEBP_INLINE int WebPPictureInit(WebPPicture* picture) { + return WebPPictureInitInternal(picture, WEBP_ENCODER_ABI_VERSION); +} + +//------------------------------------------------------------------------------ +// WebPPicture utils + +// Convenience allocation / deallocation based on picture->width/height: +// Allocate y/u/v buffers as per colorspace/width/height specification. +// Note! This function will free the previous buffer if needed. +// Returns false in case of memory error. +WEBP_EXTERN(int) WebPPictureAlloc(WebPPicture* picture); + +// Release the memory allocated by WebPPictureAlloc() or WebPPictureImport*(). +// Note that this function does _not_ free the memory used by the 'picture' +// object itself. +// Besides memory (which is reclaimed) all other fields of 'picture' are +// preserved. +WEBP_EXTERN(void) WebPPictureFree(WebPPicture* picture); + +// Copy the pixels of *src into *dst, using WebPPictureAlloc. Upon return, +// *dst will fully own the copied pixels (this is not a view). +// Returns false in case of memory allocation error. +WEBP_EXTERN(int) WebPPictureCopy(const WebPPicture* src, WebPPicture* dst); + +// Compute PSNR or SSIM distortion between two pictures. +// Result is in dB, stores in result[] in the Y/U/V/Alpha/All order. +// Returns false in case of error (pic1 and pic2 don't have same dimension, ...) +// Warning: this function is rather CPU-intensive. +WEBP_EXTERN(int) WebPPictureDistortion( + const WebPPicture* pic1, const WebPPicture* pic2, + int metric_type, // 0 = PSNR, 1 = SSIM + float result[5]); + +// self-crops a picture to the rectangle defined by top/left/width/height. +// Returns false in case of memory allocation error, or if the rectangle is +// outside of the source picture. +// The rectangle for the view is defined by the top-left corner pixel +// coordinates (left, top) as well as its width and height. This rectangle +// must be fully be comprised inside the 'src' source picture. If the source +// picture uses the YUV420 colorspace, the top and left coordinates will be +// snapped to even values. +WEBP_EXTERN(int) WebPPictureCrop(WebPPicture* picture, + int left, int top, int width, int height); + +// Extracts a view from 'src' picture into 'dst'. The rectangle for the view +// is defined by the top-left corner pixel coordinates (left, top) as well +// as its width and height. This rectangle must be fully be comprised inside +// the 'src' source picture. If the source picture uses the YUV420 colorspace, +// the top and left coordinates will be snapped to even values. +// Picture 'src' must out-live 'dst' picture. Self-extraction of view is allowed +// ('src' equal to 'dst') as a mean of fast-cropping (but note that doing so, +// the original dimension will be lost). +// Returns false in case of memory allocation error or invalid parameters. +WEBP_EXTERN(int) WebPPictureView(const WebPPicture* src, + int left, int top, int width, int height, + WebPPicture* dst); + +// Returns true if the 'picture' is actually a view and therefore does +// not own the memory for pixels. +WEBP_EXTERN(int) WebPPictureIsView(const WebPPicture* picture); + +// Rescale a picture to new dimension width x height. +// Now gamma correction is applied. +// Returns false in case of error (invalid parameter or insufficient memory). +WEBP_EXTERN(int) WebPPictureRescale(WebPPicture* pic, int width, int height); + +// Colorspace conversion function to import RGB samples. +// Previous buffer will be free'd, if any. +// *rgb buffer should have a size of at least height * rgb_stride. +// Returns false in case of memory error. +WEBP_EXTERN(int) WebPPictureImportRGB( + WebPPicture* picture, const uint8_t* rgb, int rgb_stride); +// Same, but for RGBA buffer. +WEBP_EXTERN(int) WebPPictureImportRGBA( + WebPPicture* picture, const uint8_t* rgba, int rgba_stride); +// Same, but for RGBA buffer. Imports the RGB direct from the 32-bit format +// input buffer ignoring the alpha channel. Avoids needing to copy the data +// to a temporary 24-bit RGB buffer to import the RGB only. +WEBP_EXTERN(int) WebPPictureImportRGBX( + WebPPicture* picture, const uint8_t* rgbx, int rgbx_stride); + +// Variants of the above, but taking BGR(A|X) input. +WEBP_EXTERN(int) WebPPictureImportBGR( + WebPPicture* picture, const uint8_t* bgr, int bgr_stride); +WEBP_EXTERN(int) WebPPictureImportBGRA( + WebPPicture* picture, const uint8_t* bgra, int bgra_stride); +WEBP_EXTERN(int) WebPPictureImportBGRX( + WebPPicture* picture, const uint8_t* bgrx, int bgrx_stride); + +// Converts picture->argb data to the YUVA format specified by 'colorspace'. +// Upon return, picture->use_argb is set to false. The presence of real +// non-opaque transparent values is detected, and 'colorspace' will be +// adjusted accordingly. Note that this method is lossy. +// Returns false in case of error. +WEBP_EXTERN(int) WebPPictureARGBToYUVA(WebPPicture* picture, + WebPEncCSP colorspace); + +// Converts picture->yuv to picture->argb and sets picture->use_argb to true. +// The input format must be YUV_420 or YUV_420A. +// Note that the use of this method is discouraged if one has access to the +// raw ARGB samples, since using YUV420 is comparatively lossy. Also, the +// conversion from YUV420 to ARGB incurs a small loss too. +// Returns false in case of error. +WEBP_EXTERN(int) WebPPictureYUVAToARGB(WebPPicture* picture); + +// Helper function: given a width x height plane of YUV(A) samples +// (with stride 'stride'), clean-up the YUV samples under fully transparent +// area, to help compressibility (no guarantee, though). +WEBP_EXTERN(void) WebPCleanupTransparentArea(WebPPicture* picture); + +// Scan the picture 'picture' for the presence of non fully opaque alpha values. +// Returns true in such case. Otherwise returns false (indicating that the +// alpha plane can be ignored altogether e.g.). +WEBP_EXTERN(int) WebPPictureHasTransparency(const WebPPicture* picture); + +//------------------------------------------------------------------------------ +// Main call + +// Main encoding call, after config and picture have been initialized. +// 'picture' must be less than 16384x16384 in dimension (cf WEBP_MAX_DIMENSION), +// and the 'config' object must be a valid one. +// Returns false in case of error, true otherwise. +// In case of error, picture->error_code is updated accordingly. +// 'picture' can hold the source samples in both YUV(A) or ARGB input, depending +// on the value of 'picture->use_argb'. It is highly recommended to use +// the former for lossy encoding, and the latter for lossless encoding +// (when config.lossless is true). Automatic conversion from one format to +// another is provided but they both incur some loss. +WEBP_EXTERN(int) WebPEncode(const WebPConfig* config, WebPPicture* picture); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_WEBP_ENCODE_H_ */ diff --git a/drivers/webpold/format_constants.h b/drivers/webpold/format_constants.h new file mode 100644 index 0000000000..7ce498f672 --- /dev/null +++ b/drivers/webpold/format_constants.h @@ -0,0 +1,90 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Internal header for constants related to WebP file format. +// +// Author: Urvang (urvang@google.com) + +#ifndef WEBP_WEBP_FORMAT_CONSTANTS_H_ +#define WEBP_WEBP_FORMAT_CONSTANTS_H_ + +// VP8 related constants. +#define VP8_SIGNATURE 0x9d012a // Signature in VP8 data. +#define VP8_MAX_PARTITION0_SIZE (1 << 19) // max size of mode partition +#define VP8_MAX_PARTITION_SIZE (1 << 24) // max size for token partition +#define VP8_FRAME_HEADER_SIZE 10 // Size of the frame header within VP8 data. + +// VP8L related constants. +#define VP8L_SIGNATURE_SIZE 1 // VP8L signature size. +#define VP8L_MAGIC_BYTE 0x2f // VP8L signature byte. +#define VP8L_IMAGE_SIZE_BITS 14 // Number of bits used to store + // width and height. +#define VP8L_VERSION_BITS 3 // 3 bits reserved for version. +#define VP8L_VERSION 0 // version 0 +#define VP8L_FRAME_HEADER_SIZE 5 // Size of the VP8L frame header. + +#define MAX_PALETTE_SIZE 256 +#define MAX_CACHE_BITS 11 +#define HUFFMAN_CODES_PER_META_CODE 5 +#define ARGB_BLACK 0xff000000 + +#define DEFAULT_CODE_LENGTH 8 +#define MAX_ALLOWED_CODE_LENGTH 15 + +#define NUM_LITERAL_CODES 256 +#define NUM_LENGTH_CODES 24 +#define NUM_DISTANCE_CODES 40 +#define CODE_LENGTH_CODES 19 + +#define MIN_HUFFMAN_BITS 2 // min number of Huffman bits +#define MAX_HUFFMAN_BITS 9 // max number of Huffman bits + +#define TRANSFORM_PRESENT 1 // The bit to be written when next data + // to be read is a transform. +#define NUM_TRANSFORMS 4 // Maximum number of allowed transform + // in a bitstream. +typedef enum { + PREDICTOR_TRANSFORM = 0, + CROSS_COLOR_TRANSFORM = 1, + SUBTRACT_GREEN = 2, + COLOR_INDEXING_TRANSFORM = 3 +} VP8LImageTransformType; + +// Alpha related constants. +#define ALPHA_HEADER_LEN 1 +#define ALPHA_NO_COMPRESSION 0 +#define ALPHA_LOSSLESS_COMPRESSION 1 +#define ALPHA_PREPROCESSED_LEVELS 1 + +// Mux related constants. +#define TAG_SIZE 4 // Size of a chunk tag (e.g. "VP8L"). +#define CHUNK_SIZE_BYTES 4 // Size needed to store chunk's size. +#define CHUNK_HEADER_SIZE 8 // Size of a chunk header. +#define RIFF_HEADER_SIZE 12 // Size of the RIFF header ("RIFFnnnnWEBP"). +#define FRAME_CHUNK_SIZE 15 // Size of a FRM chunk. +#define LOOP_CHUNK_SIZE 2 // Size of a LOOP chunk. +#define TILE_CHUNK_SIZE 6 // Size of a TILE chunk. +#define VP8X_CHUNK_SIZE 10 // Size of a VP8X chunk. + +#define TILING_FLAG_BIT 0x01 // Set if tiles are possibly used. +#define ANIMATION_FLAG_BIT 0x02 // Set if some animation is expected +#define ICC_FLAG_BIT 0x04 // Whether ICC is present or not. +#define METADATA_FLAG_BIT 0x08 // Set if some META chunk is possibly present. +#define ALPHA_FLAG_BIT 0x10 // Should be same as the ALPHA_FLAG in mux.h +#define ROTATION_FLAG_BITS 0xe0 // all 3 bits for rotation + symmetry + +#define MAX_CANVAS_SIZE (1 << 24) // 24-bit max for VP8X width/height. +#define MAX_IMAGE_AREA (1ULL << 32) // 32-bit max for width x height. +#define MAX_LOOP_COUNT (1 << 16) // maximum value for loop-count +#define MAX_DURATION (1 << 24) // maximum duration +#define MAX_POSITION_OFFSET (1 << 24) // maximum frame/tile x/y offset + +// Maximum chunk payload is such that adding the header and padding won't +// overflow a uint32_t. +#define MAX_CHUNK_PAYLOAD (~0U - CHUNK_HEADER_SIZE - 1) + +#endif /* WEBP_WEBP_FORMAT_CONSTANTS_H_ */ diff --git a/drivers/webpold/image_loader_webp.cpp b/drivers/webpold/image_loader_webp.cpp new file mode 100644 index 0000000000..9d8a616556 --- /dev/null +++ b/drivers/webpold/image_loader_webp.cpp @@ -0,0 +1,165 @@ +/*************************************************/ +/* image_loader_webp.cpp */ +/*************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/*************************************************/ +/* Source code within this file is: */ +/* (c) 2007-2010 Juan Linietsky, Ariel Manzur */ +/* All Rights Reserved. */ +/*************************************************/ + +#include "image_loader_webp.h" + +#include "print_string.h" +#include "os/os.h" +#include "drivers/webp/decode.h" +#include "drivers/webp/encode.h" +#include "io/marshalls.h" +#include <stdlib.h> + +static DVector<uint8_t> _webp_lossy_pack(const Image& p_image,float p_quality) { + + ERR_FAIL_COND_V(p_image.empty(),DVector<uint8_t>()); + + Image img=p_image; + if (img.detect_alpha()) + img.convert(Image::FORMAT_RGBA); + else + img.convert(Image::FORMAT_RGB); + + Size2 s(img.get_width(),img.get_height()); + DVector<uint8_t> data = img.get_data(); + DVector<uint8_t>::Read r = data.read(); + + uint8_t *dst_buff=NULL; + size_t dst_size=0; + if (img.get_format()==Image::FORMAT_RGB) { + + dst_size = WebPEncodeRGB(r.ptr(),s.width,s.height,3*s.width,CLAMP(p_quality*100.0,0,100.0),&dst_buff); + } else { + dst_size = WebPEncodeRGBA(r.ptr(),s.width,s.height,4*s.width,CLAMP(p_quality*100.0,0,100.0),&dst_buff); + } + + ERR_FAIL_COND_V(dst_size==0,DVector<uint8_t>()); + DVector<uint8_t> dst; + dst.resize(4+dst_size); + DVector<uint8_t>::Write w = dst.write(); + w[0]='W'; + w[1]='E'; + w[2]='B'; + w[3]='P'; + copymem(&w[4],dst_buff,dst_size); + free(dst_buff); + w=DVector<uint8_t>::Write(); + return dst; +} + +static Image _webp_lossy_unpack(const DVector<uint8_t>& p_buffer) { + + int size = p_buffer.size()-4; + ERR_FAIL_COND_V(size<=0,Image()); + DVector<uint8_t>::Read r = p_buffer.read(); + + ERR_FAIL_COND_V(r[0]!='W' || r[1]!='E' || r[2]!='B' || r[3]!='P',Image()); + WebPBitstreamFeatures features; + if (WebPGetFeatures(&r[4],size,&features)!=VP8_STATUS_OK) { + ERR_EXPLAIN("Error unpacking WEBP image:"); + ERR_FAIL_V(Image()); + } + + //print_line("width: "+itos(features.width)); + //print_line("height: "+itos(features.height)); + //print_line("alpha: "+itos(features.has_alpha)); + + DVector<uint8_t> dst_image; + int datasize = features.width*features.height*(features.has_alpha?4:3); + dst_image.resize(datasize); + + DVector<uint8_t>::Write dst_w = dst_image.write(); + + bool errdec=false; + if (features.has_alpha) { + errdec = WebPDecodeRGBAInto(&r[4],size,dst_w.ptr(),datasize,4*features.width)==NULL; + } else { + errdec = WebPDecodeRGBInto(&r[4],size,dst_w.ptr(),datasize,3*features.width)==NULL; + + } + + //ERR_EXPLAIN("Error decoding webp! - "+p_file); + ERR_FAIL_COND_V(errdec,Image()); + + dst_w = DVector<uint8_t>::Write(); + + return Image(features.width,features.height,0,features.has_alpha?Image::FORMAT_RGBA:Image::FORMAT_RGB,dst_image); + +} + + +Error ImageLoaderWEBP::load_image(Image *p_image,FileAccess *f) { + + + uint32_t size = f->get_len(); + DVector<uint8_t> src_image; + src_image.resize(size); + + WebPBitstreamFeatures features; + + DVector<uint8_t>::Write src_w = src_image.write(); + f->get_buffer(src_w.ptr(),size); + ERR_FAIL_COND_V(f->eof_reached(), ERR_FILE_EOF); + + if (WebPGetFeatures(src_w.ptr(),size,&features)!=VP8_STATUS_OK) { + f->close(); + //ERR_EXPLAIN("Error decoding WEBP image: "+p_file); + ERR_FAIL_V(ERR_FILE_CORRUPT); + } + + print_line("width: "+itos(features.width)); + print_line("height: "+itos(features.height)); + print_line("alpha: "+itos(features.has_alpha)); + + src_w = DVector<uint8_t>::Write(); + + DVector<uint8_t> dst_image; + int datasize = features.width*features.height*(features.has_alpha?4:3); + dst_image.resize(datasize); + + DVector<uint8_t>::Read src_r = src_image.read(); + DVector<uint8_t>::Write dst_w = dst_image.write(); + + + bool errdec=false; + if (features.has_alpha) { + errdec = WebPDecodeRGBAInto(src_r.ptr(),size,dst_w.ptr(),datasize,4*features.width)==NULL; + } else { + errdec = WebPDecodeRGBInto(src_r.ptr(),size,dst_w.ptr(),datasize,3*features.width)==NULL; + + } + + //ERR_EXPLAIN("Error decoding webp! - "+p_file); + ERR_FAIL_COND_V(errdec,ERR_FILE_CORRUPT); + + src_r = DVector<uint8_t>::Read(); + dst_w = DVector<uint8_t>::Write(); + + *p_image = Image(features.width,features.height,0,features.has_alpha?Image::FORMAT_RGBA:Image::FORMAT_RGB,dst_image); + + + return OK; + +} + +void ImageLoaderWEBP::get_recognized_extensions(List<String> *p_extensions) const { + + p_extensions->push_back("webp"); +} + + +ImageLoaderWEBP::ImageLoaderWEBP() { + + Image::lossy_packer=_webp_lossy_pack; + Image::lossy_unpacker=_webp_lossy_unpack; +} + + diff --git a/drivers/webpold/image_loader_webp.h b/drivers/webpold/image_loader_webp.h new file mode 100644 index 0000000000..8fc188cc9c --- /dev/null +++ b/drivers/webpold/image_loader_webp.h @@ -0,0 +1,32 @@ +/*************************************************/ +/* image_loader_webp.h */ +/*************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/*************************************************/ +/* Source code within this file is: */ +/* (c) 2007-2010 Juan Linietsky, Ariel Manzur */ +/* All Rights Reserved. */ +/*************************************************/ + +#ifndef IMAGE_LOADER_WEBP_H +#define IMAGE_LOADER_WEBP_H + +#include "io/image_loader.h" + +/** + @author Juan Linietsky <reduzio@gmail.com> +*/ +class ImageLoaderWEBP : public ImageFormatLoader { + + +public: + + virtual Error load_image(Image *p_image,FileAccess *f); + virtual void get_recognized_extensions(List<String> *p_extensions) const; + ImageLoaderWEBP(); +}; + + + +#endif diff --git a/drivers/webpold/mux.h b/drivers/webpold/mux.h new file mode 100644 index 0000000000..5139af80fa --- /dev/null +++ b/drivers/webpold/mux.h @@ -0,0 +1,604 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// RIFF container manipulation for WEBP images. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +// This API allows manipulation of WebP container images containing features +// like Color profile, XMP metadata, Animation and Tiling. +// +// Code Example#1: Creating a MUX with image data, color profile and XMP +// metadata. +// +// int copy_data = 0; +// WebPMux* mux = WebPMuxNew(); +// // ... (Prepare image data). +// WebPMuxSetImage(mux, &image, copy_data); +// // ... (Prepare ICCP color profile data). +// WebPMuxSetColorProfile(mux, &icc_profile, copy_data); +// // ... (Prepare XMP metadata). +// WebPMuxSetMetadata(mux, &xmp, copy_data); +// // Get data from mux in WebP RIFF format. +// WebPMuxAssemble(mux, &output_data); +// WebPMuxDelete(mux); +// // ... (Consume output_data; e.g. write output_data.bytes_ to file). +// WebPDataClear(&output_data); +// +// Code Example#2: Get image and color profile data from a WebP file. +// +// int copy_data = 0; +// // ... (Read data from file). +// WebPMux* mux = WebPMuxCreate(&data, copy_data); +// WebPMuxGetImage(mux, &image); +// // ... (Consume image; e.g. call WebPDecode() to decode the data). +// WebPMuxGetColorProfile(mux, &icc_profile); +// // ... (Consume icc_data). +// WebPMuxDelete(mux); +// free(data); + +#ifndef WEBP_WEBP_MUX_H_ +#define WEBP_WEBP_MUX_H_ + +#include "./types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define WEBP_MUX_ABI_VERSION 0x0100 // MAJOR(8b) + MINOR(8b) + +// Error codes +typedef enum { + WEBP_MUX_OK = 1, + WEBP_MUX_NOT_FOUND = 0, + WEBP_MUX_INVALID_ARGUMENT = -1, + WEBP_MUX_BAD_DATA = -2, + WEBP_MUX_MEMORY_ERROR = -3, + WEBP_MUX_NOT_ENOUGH_DATA = -4 +} WebPMuxError; + +// Flag values for different features used in VP8X chunk. +typedef enum { + TILE_FLAG = 0x00000001, + ANIMATION_FLAG = 0x00000002, + ICCP_FLAG = 0x00000004, + META_FLAG = 0x00000008, + ALPHA_FLAG = 0x00000010 +} WebPFeatureFlags; + +// IDs for different types of chunks. +typedef enum { + WEBP_CHUNK_VP8X, // VP8X + WEBP_CHUNK_ICCP, // ICCP + WEBP_CHUNK_LOOP, // LOOP + WEBP_CHUNK_FRAME, // FRM + WEBP_CHUNK_TILE, // TILE + WEBP_CHUNK_ALPHA, // ALPH + WEBP_CHUNK_IMAGE, // VP8/VP8L + WEBP_CHUNK_META, // META + WEBP_CHUNK_UNKNOWN, // Other chunks. + WEBP_CHUNK_NIL +} WebPChunkId; + +typedef struct WebPMux WebPMux; // main opaque object. + +// Data type used to describe 'raw' data, e.g., chunk data +// (ICC profile, metadata) and WebP compressed image data. +typedef struct { + const uint8_t* bytes_; + size_t size_; +} WebPData; + +//------------------------------------------------------------------------------ +// Manipulation of a WebPData object. + +// Initializes the contents of the 'webp_data' object with default values. +WEBP_EXTERN(void) WebPDataInit(WebPData* webp_data); + +// Clears the contents of the 'webp_data' object by calling free(). Does not +// deallocate the object itself. +WEBP_EXTERN(void) WebPDataClear(WebPData* webp_data); + +// Allocates necessary storage for 'dst' and copies the contents of 'src'. +// Returns true on success. +WEBP_EXTERN(int) WebPDataCopy(const WebPData* src, WebPData* dst); + +//------------------------------------------------------------------------------ +// Life of a Mux object + +// Internal, version-checked, entry point +WEBP_EXTERN(WebPMux*) WebPNewInternal(int); + +// Creates an empty mux object. +// Returns: +// A pointer to the newly created empty mux object. +static WEBP_INLINE WebPMux* WebPMuxNew(void) { + return WebPNewInternal(WEBP_MUX_ABI_VERSION); +} + +// Deletes the mux object. +// Parameters: +// mux - (in/out) object to be deleted +WEBP_EXTERN(void) WebPMuxDelete(WebPMux* mux); + +//------------------------------------------------------------------------------ +// Mux creation. + +// Internal, version-checked, entry point +WEBP_EXTERN(WebPMux*) WebPMuxCreateInternal(const WebPData*, int, int); + +// Creates a mux object from raw data given in WebP RIFF format. +// Parameters: +// bitstream - (in) the bitstream data in WebP RIFF format +// copy_data - (in) value 1 indicates given data WILL copied to the mux, and +// value 0 indicates data will NOT be copied. +// Returns: +// A pointer to the mux object created from given data - on success. +// NULL - In case of invalid data or memory error. +static WEBP_INLINE WebPMux* WebPMuxCreate(const WebPData* bitstream, + int copy_data) { + return WebPMuxCreateInternal(bitstream, copy_data, WEBP_MUX_ABI_VERSION); +} + +//------------------------------------------------------------------------------ +// Single Image. + +// Sets the image in the mux object. Any existing images (including frame/tile) +// will be removed. +// Parameters: +// mux - (in/out) object in which the image is to be set +// bitstream - (in) can either be a raw VP8/VP8L bitstream or a single-image +// WebP file (non-animated and non-tiled) +// copy_data - (in) value 1 indicates given data WILL copied to the mux, and +// value 0 indicates data will NOT be copied. +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or bitstream is NULL. +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxSetImage(WebPMux* mux, + const WebPData* bitstream, + int copy_data); + +// Gets image data from the mux object. +// The content of 'bitstream' is allocated using malloc(), and NOT +// owned by the 'mux' object. It MUST be deallocated by the caller by calling +// WebPDataClear(). +// Parameters: +// mux - (in) object from which the image is to be fetched +// bitstream - (out) the image data +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if either mux or bitstream is NULL +// OR mux contains animation/tiling. +// WEBP_MUX_NOT_FOUND - if image is not present in mux object. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxGetImage(const WebPMux* mux, + WebPData* bitstream); + +// Deletes the image in the mux object. +// Parameters: +// mux - (in/out) object from which the image is to be deleted +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL +// OR if mux contains animation/tiling. +// WEBP_MUX_NOT_FOUND - if image is not present in mux object. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxDeleteImage(WebPMux* mux); + +//------------------------------------------------------------------------------ +// XMP Metadata. + +// Sets the XMP metadata in the mux object. Any existing metadata chunk(s) will +// be removed. +// Parameters: +// mux - (in/out) object to which the XMP metadata is to be added +// metadata - (in) the XMP metadata data to be added +// copy_data - (in) value 1 indicates given data WILL copied to the mux, and +// value 0 indicates data will NOT be copied. +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux or metadata is NULL. +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxSetMetadata(WebPMux* mux, + const WebPData* metadata, + int copy_data); + +// Gets a reference to the XMP metadata in the mux object. +// The caller should NOT free the returned data. +// Parameters: +// mux - (in) object from which the XMP metadata is to be fetched +// metadata - (out) XMP metadata +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if either mux or metadata is NULL. +// WEBP_MUX_NOT_FOUND - if metadata is not present in mux object. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxGetMetadata(const WebPMux* mux, + WebPData* metadata); + +// Deletes the XMP metadata in the mux object. +// Parameters: +// mux - (in/out) object from which XMP metadata is to be deleted +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL +// WEBP_MUX_NOT_FOUND - If mux does not contain metadata. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxDeleteMetadata(WebPMux* mux); + +//------------------------------------------------------------------------------ +// ICC Color Profile. + +// Sets the color profile in the mux object. Any existing color profile chunk(s) +// will be removed. +// Parameters: +// mux - (in/out) object to which the color profile is to be added +// color_profile - (in) the color profile data to be added +// copy_data - (in) value 1 indicates given data WILL copied to the mux, and +// value 0 indicates data will NOT be copied. +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux or color_profile is NULL +// WEBP_MUX_MEMORY_ERROR - on memory allocation error +// WEBP_MUX_OK - on success +WEBP_EXTERN(WebPMuxError) WebPMuxSetColorProfile(WebPMux* mux, + const WebPData* color_profile, + int copy_data); + +// Gets a reference to the color profile in the mux object. +// The caller should NOT free the returned data. +// Parameters: +// mux - (in) object from which the color profile data is to be fetched +// color_profile - (out) color profile data +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if either mux or color_profile is NULL. +// WEBP_MUX_NOT_FOUND - if color profile is not present in mux object. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxGetColorProfile(const WebPMux* mux, + WebPData* color_profile); + +// Deletes the color profile in the mux object. +// Parameters: +// mux - (in/out) object from which color profile is to be deleted +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL +// WEBP_MUX_NOT_FOUND - If mux does not contain color profile. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxDeleteColorProfile(WebPMux* mux); + +//------------------------------------------------------------------------------ +// Animation. + +// Adds an animation frame at the end of the mux object. +// Note: as WebP only supports even offsets, any odd offset will be snapped to +// an even location using: offset &= ~1 +// Parameters: +// mux - (in/out) object to which an animation frame is to be added +// bitstream - (in) the image data corresponding to the frame. It can either +// be a raw VP8/VP8L bitstream or a single-image WebP file +// (non-animated and non-tiled) +// x_offset - (in) x-offset of the frame to be added +// y_offset - (in) y-offset of the frame to be added +// duration - (in) duration of the frame to be added (in milliseconds) +// copy_data - (in) value 1 indicates given data WILL copied to the mux, and +// value 0 indicates data will NOT be copied. +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or bitstream is NULL +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxPushFrame( + WebPMux* mux, const WebPData* bitstream, + int x_offset, int y_offset, int duration, int copy_data); + +// TODO(urvang): Create a struct as follows to reduce argument list size: +// typedef struct { +// WebPData bitstream; +// int x_offset, y_offset; +// int duration; +// } FrameInfo; + +// Gets the nth animation frame from the mux object. +// The content of 'bitstream' is allocated using malloc(), and NOT +// owned by the 'mux' object. It MUST be deallocated by the caller by calling +// WebPDataClear(). +// nth=0 has a special meaning - last position. +// Parameters: +// mux - (in) object from which the info is to be fetched +// nth - (in) index of the frame in the mux object +// bitstream - (out) the image data +// x_offset - (out) x-offset of the returned frame +// y_offset - (out) y-offset of the returned frame +// duration - (out) duration of the returned frame (in milliseconds) +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if either mux, bitstream, x_offset, +// y_offset, or duration is NULL +// WEBP_MUX_NOT_FOUND - if there are less than nth frames in the mux object. +// WEBP_MUX_BAD_DATA - if nth frame chunk in mux is invalid. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxGetFrame( + const WebPMux* mux, uint32_t nth, WebPData* bitstream, + int* x_offset, int* y_offset, int* duration); + +// Deletes an animation frame from the mux object. +// nth=0 has a special meaning - last position. +// Parameters: +// mux - (in/out) object from which a frame is to be deleted +// nth - (in) The position from which the frame is to be deleted +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL +// WEBP_MUX_NOT_FOUND - If there are less than nth frames in the mux object +// before deletion. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxDeleteFrame(WebPMux* mux, uint32_t nth); + +// Sets the animation loop count in the mux object. Any existing loop count +// value(s) will be removed. +// Parameters: +// mux - (in/out) object in which loop chunk is to be set/added +// loop_count - (in) animation loop count value. +// Note that loop_count of zero denotes infinite loop. +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxSetLoopCount(WebPMux* mux, int loop_count); + +// Gets the animation loop count from the mux object. +// Parameters: +// mux - (in) object from which the loop count is to be fetched +// loop_count - (out) the loop_count value present in the LOOP chunk +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if either of mux or loop_count is NULL +// WEBP_MUX_NOT_FOUND - if loop chunk is not present in mux object. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxGetLoopCount(const WebPMux* mux, + int* loop_count); + +//------------------------------------------------------------------------------ +// Tiling. + +// Adds a tile at the end of the mux object. +// Note: as WebP only supports even offsets, any odd offset will be snapped to +// an even location using: offset &= ~1 +// Parameters: +// mux - (in/out) object to which a tile is to be added. +// bitstream - (in) the image data corresponding to the frame. It can either +// be a raw VP8/VP8L bitstream or a single-image WebP file +// (non-animated and non-tiled) +// x_offset - (in) x-offset of the tile to be added +// y_offset - (in) y-offset of the tile to be added +// copy_data - (in) value 1 indicates given data WILL copied to the mux, and +// value 0 indicates data will NOT be copied. +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or bitstream is NULL +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxPushTile( + WebPMux* mux, const WebPData* bitstream, + int x_offset, int y_offset, int copy_data); + +// Gets the nth tile from the mux object. +// The content of 'bitstream' is allocated using malloc(), and NOT +// owned by the 'mux' object. It MUST be deallocated by the caller by calling +// WebPDataClear(). +// nth=0 has a special meaning - last position. +// Parameters: +// mux - (in) object from which the info is to be fetched +// nth - (in) index of the tile in the mux object +// bitstream - (out) the image data +// x_offset - (out) x-offset of the returned tile +// y_offset - (out) y-offset of the returned tile +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if either mux, bitstream, x_offset or +// y_offset is NULL +// WEBP_MUX_NOT_FOUND - if there are less than nth tiles in the mux object. +// WEBP_MUX_BAD_DATA - if nth tile chunk in mux is invalid. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxGetTile( + const WebPMux* mux, uint32_t nth, WebPData* bitstream, + int* x_offset, int* y_offset); + +// Deletes a tile from the mux object. +// nth=0 has a special meaning - last position +// Parameters: +// mux - (in/out) object from which a tile is to be deleted +// nth - (in) The position from which the tile is to be deleted +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL +// WEBP_MUX_NOT_FOUND - If there are less than nth tiles in the mux object +// before deletion. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxDeleteTile(WebPMux* mux, uint32_t nth); + +//------------------------------------------------------------------------------ +// Misc Utilities. + +// Gets the feature flags from the mux object. +// Parameters: +// mux - (in) object from which the features are to be fetched +// flags - (out) the flags specifying which features are present in the +// mux object. This will be an OR of various flag values. +// Enum 'WebPFeatureFlags' can be used to test individual flag values. +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux or flags is NULL +// WEBP_MUX_NOT_FOUND - if VP8X chunk is not present in mux object. +// WEBP_MUX_BAD_DATA - if VP8X chunk in mux is invalid. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxGetFeatures(const WebPMux* mux, + uint32_t* flags); + +// Gets number of chunks having tag value tag in the mux object. +// Parameters: +// mux - (in) object from which the info is to be fetched +// id - (in) chunk id specifying the type of chunk +// num_elements - (out) number of chunks with the given chunk id +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if either mux, or num_elements is NULL +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxNumChunks(const WebPMux* mux, + WebPChunkId id, int* num_elements); + +// Assembles all chunks in WebP RIFF format and returns in 'assembled_data'. +// This function also validates the mux object. +// Note: The content of 'assembled_data' will be ignored and overwritten. +// Also, the content of 'assembled_data' is allocated using malloc(), and NOT +// owned by the 'mux' object. It MUST be deallocated by the caller by calling +// WebPDataClear(). +// Parameters: +// mux - (in/out) object whose chunks are to be assembled +// assembled_data - (out) assembled WebP data +// Returns: +// WEBP_MUX_BAD_DATA - if mux object is invalid. +// WEBP_MUX_INVALID_ARGUMENT - if either mux, output_data or output_size is +// NULL. +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. +// WEBP_MUX_OK - on success +WEBP_EXTERN(WebPMuxError) WebPMuxAssemble(WebPMux* mux, + WebPData* assembled_data); + +//------------------------------------------------------------------------------ +// Demux API. +// Enables extraction of image and extended format data from WebP files. + +#define WEBP_DEMUX_ABI_VERSION 0x0100 // MAJOR(8b) + MINOR(8b) + +typedef struct WebPDemuxer WebPDemuxer; + +typedef enum { + WEBP_DEMUX_PARSING_HEADER, // Not enough data to parse full header. + WEBP_DEMUX_PARSED_HEADER, // Header parsing complete, data may be available. + WEBP_DEMUX_DONE // Entire file has been parsed. +} WebPDemuxState; + +//------------------------------------------------------------------------------ +// Life of a Demux object + +// Internal, version-checked, entry point +WEBP_EXTERN(WebPDemuxer*) WebPDemuxInternal( + const WebPData*, int, WebPDemuxState*, int); + +// Parses the WebP file given by 'data'. +// A complete WebP file must be present in 'data' for the function to succeed. +// Returns a WebPDemuxer object on successful parse, NULL otherwise. +static WEBP_INLINE WebPDemuxer* WebPDemux(const WebPData* data) { + return WebPDemuxInternal(data, 0, NULL, WEBP_DEMUX_ABI_VERSION); +} + +// Parses the WebP file given by 'data'. +// If 'state' is non-NULL it will be set to indicate the status of the demuxer. +// Returns a WebPDemuxer object on successful parse, NULL otherwise. +static WEBP_INLINE WebPDemuxer* WebPDemuxPartial( + const WebPData* data, WebPDemuxState* state) { + return WebPDemuxInternal(data, 1, state, WEBP_DEMUX_ABI_VERSION); +} + +// Frees memory associated with 'dmux'. +WEBP_EXTERN(void) WebPDemuxDelete(WebPDemuxer* dmux); + +//------------------------------------------------------------------------------ +// Data/information extraction. + +typedef enum { + WEBP_FF_FORMAT_FLAGS, // Extended format flags present in the 'VP8X' chunk. + WEBP_FF_CANVAS_WIDTH, + WEBP_FF_CANVAS_HEIGHT, + WEBP_FF_LOOP_COUNT +} WebPFormatFeature; + +// Get the 'feature' value from the 'dmux'. +// NOTE: values are only valid if WebPDemux() was used or WebPDemuxPartial() +// returned a state > WEBP_DEMUX_PARSING_HEADER. +WEBP_EXTERN(uint32_t) WebPDemuxGetI( + const WebPDemuxer* dmux, WebPFormatFeature feature); + +//------------------------------------------------------------------------------ +// Frame iteration. + +typedef struct { + int frame_num_; + int num_frames_; + int tile_num_; + int num_tiles_; + int x_offset_, y_offset_; // offset relative to the canvas. + int width_, height_; // dimensions of this frame or tile. + int duration_; // display duration in milliseconds. + int complete_; // true if 'tile_' contains a full frame. partial images may + // still be decoded with the WebP incremental decoder. + WebPData tile_; // The frame or tile given by 'frame_num_' and 'tile_num_'. + + uint32_t pad[4]; // padding for later use + void* private_; +} WebPIterator; + +// Retrieves frame 'frame_number' from 'dmux'. +// 'iter->tile_' points to the first tile on return from this function. +// Individual tiles may be extracted using WebPDemuxSetTile(). +// Setting 'frame_number' equal to 0 will return the last frame of the image. +// Returns false if 'dmux' is NULL or frame 'frame_number' is not present. +// Call WebPDemuxReleaseIterator() when use of the iterator is complete. +// NOTE: 'dmux' must persist for the lifetime of 'iter'. +WEBP_EXTERN(int) WebPDemuxGetFrame( + const WebPDemuxer* dmux, int frame_number, WebPIterator* iter); + +// Sets 'iter->tile_' to point to the next ('iter->frame_num_' + 1) or previous +// ('iter->frame_num_' - 1) frame. These functions do not loop. +// Returns true on success, false otherwise. +WEBP_EXTERN(int) WebPDemuxNextFrame(WebPIterator* iter); +WEBP_EXTERN(int) WebPDemuxPrevFrame(WebPIterator* iter); + +// Sets 'iter->tile_' to reflect tile number 'tile_number'. +// Returns true if tile 'tile_number' is present, false otherwise. +WEBP_EXTERN(int) WebPDemuxSelectTile(WebPIterator* iter, int tile_number); + +// Releases any memory associated with 'iter'. +// Must be called before destroying the associated WebPDemuxer with +// WebPDemuxDelete(). +WEBP_EXTERN(void) WebPDemuxReleaseIterator(WebPIterator* iter); + +//------------------------------------------------------------------------------ +// Chunk iteration. + +typedef struct { + // The current and total number of chunks with the fourcc given to + // WebPDemuxGetChunk(). + int chunk_num_; + int num_chunks_; + WebPData chunk_; // The payload of the chunk. + + uint32_t pad[6]; // padding for later use + void* private_; +} WebPChunkIterator; + +// Retrieves the 'chunk_number' instance of the chunk with id 'fourcc' from +// 'dmux'. +// 'fourcc' is a character array containing the fourcc of the chunk to return, +// e.g., "ICCP", "META", "EXIF", etc. +// Setting 'chunk_number' equal to 0 will return the last chunk in a set. +// Returns true if the chunk is found, false otherwise. Image related chunk +// payloads are accessed through WebPDemuxGetFrame() and related functions. +// Call WebPDemuxReleaseChunkIterator() when use of the iterator is complete. +// NOTE: 'dmux' must persist for the lifetime of the iterator. +WEBP_EXTERN(int) WebPDemuxGetChunk(const WebPDemuxer* dmux, + const char fourcc[4], int chunk_number, + WebPChunkIterator* iter); + +// Sets 'iter->chunk_' to point to the next ('iter->chunk_num_' + 1) or previous +// ('iter->chunk_num_' - 1) chunk. These functions do not loop. +// Returns true on success, false otherwise. +WEBP_EXTERN(int) WebPDemuxNextChunk(WebPChunkIterator* iter); +WEBP_EXTERN(int) WebPDemuxPrevChunk(WebPChunkIterator* iter); + +// Releases any memory associated with 'iter'. +// Must be called before destroying the associated WebPDemuxer with +// WebPDemuxDelete(). +WEBP_EXTERN(void) WebPDemuxReleaseChunkIterator(WebPChunkIterator* iter); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_WEBP_MUX_H_ */ diff --git a/drivers/webp/mux/demux.c b/drivers/webpold/mux/demux.c index 501d08f41d..501d08f41d 100644 --- a/drivers/webp/mux/demux.c +++ b/drivers/webpold/mux/demux.c diff --git a/drivers/webpold/mux/muxedit.c b/drivers/webpold/mux/muxedit.c new file mode 100644 index 0000000000..08629d4ae2 --- /dev/null +++ b/drivers/webpold/mux/muxedit.c @@ -0,0 +1,712 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Set and delete APIs for mux. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +#include <assert.h> +#include "./muxi.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Life of a mux object. + +static void MuxInit(WebPMux* const mux) { + if (mux == NULL) return; + memset(mux, 0, sizeof(*mux)); +} + +WebPMux* WebPNewInternal(int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_MUX_ABI_VERSION)) { + return NULL; + } else { + WebPMux* const mux = (WebPMux*)malloc(sizeof(WebPMux)); + // If mux is NULL MuxInit is a noop. + MuxInit(mux); + return mux; + } +} + +static void DeleteAllChunks(WebPChunk** const chunk_list) { + while (*chunk_list) { + *chunk_list = ChunkDelete(*chunk_list); + } +} + +static void MuxRelease(WebPMux* const mux) { + if (mux == NULL) return; + MuxImageDeleteAll(&mux->images_); + DeleteAllChunks(&mux->vp8x_); + DeleteAllChunks(&mux->iccp_); + DeleteAllChunks(&mux->loop_); + DeleteAllChunks(&mux->meta_); + DeleteAllChunks(&mux->unknown_); +} + +void WebPMuxDelete(WebPMux* mux) { + // If mux is NULL MuxRelease is a noop. + MuxRelease(mux); + free(mux); +} + +//------------------------------------------------------------------------------ +// Helper method(s). + +// Handy MACRO, makes MuxSet() very symmetric to MuxGet(). +#define SWITCH_ID_LIST(INDEX, LIST) \ + if (idx == (INDEX)) { \ + err = ChunkAssignData(&chunk, data, copy_data, kChunks[(INDEX)].tag); \ + if (err == WEBP_MUX_OK) { \ + err = ChunkSetNth(&chunk, (LIST), nth); \ + } \ + return err; \ + } + +static WebPMuxError MuxSet(WebPMux* const mux, CHUNK_INDEX idx, uint32_t nth, + const WebPData* const data, int copy_data) { + WebPChunk chunk; + WebPMuxError err = WEBP_MUX_NOT_FOUND; + assert(mux != NULL); + assert(!IsWPI(kChunks[idx].id)); + + ChunkInit(&chunk); + SWITCH_ID_LIST(IDX_VP8X, &mux->vp8x_); + SWITCH_ID_LIST(IDX_ICCP, &mux->iccp_); + SWITCH_ID_LIST(IDX_LOOP, &mux->loop_); + SWITCH_ID_LIST(IDX_META, &mux->meta_); + if (idx == IDX_UNKNOWN && data->size_ > TAG_SIZE) { + // For raw-data unknown chunk, the first four bytes should be the tag to be + // used for the chunk. + const WebPData tmp = { data->bytes_ + TAG_SIZE, data->size_ - TAG_SIZE }; + err = ChunkAssignData(&chunk, &tmp, copy_data, GetLE32(data->bytes_ + 0)); + if (err == WEBP_MUX_OK) + err = ChunkSetNth(&chunk, &mux->unknown_, nth); + } + return err; +} +#undef SWITCH_ID_LIST + +static WebPMuxError MuxAddChunk(WebPMux* const mux, uint32_t nth, uint32_t tag, + const uint8_t* data, size_t size, + int copy_data) { + const CHUNK_INDEX idx = ChunkGetIndexFromTag(tag); + const WebPData chunk_data = { data, size }; + assert(mux != NULL); + assert(size <= MAX_CHUNK_PAYLOAD); + assert(idx != IDX_NIL); + return MuxSet(mux, idx, nth, &chunk_data, copy_data); +} + +// Create data for frame/tile given image data, offsets and duration. +static WebPMuxError CreateFrameTileData(const WebPData* const image, + int x_offset, int y_offset, + int duration, int is_lossless, + int is_frame, + WebPData* const frame_tile) { + int width; + int height; + uint8_t* frame_tile_bytes; + const size_t frame_tile_size = kChunks[is_frame ? IDX_FRAME : IDX_TILE].size; + + const int ok = is_lossless ? + VP8LGetInfo(image->bytes_, image->size_, &width, &height, NULL) : + VP8GetInfo(image->bytes_, image->size_, image->size_, &width, &height); + if (!ok) return WEBP_MUX_INVALID_ARGUMENT; + + assert(width > 0 && height > 0 && duration > 0); + // Note: assertion on upper bounds is done in PutLE24(). + + frame_tile_bytes = (uint8_t*)malloc(frame_tile_size); + if (frame_tile_bytes == NULL) return WEBP_MUX_MEMORY_ERROR; + + PutLE24(frame_tile_bytes + 0, x_offset / 2); + PutLE24(frame_tile_bytes + 3, y_offset / 2); + + if (is_frame) { + PutLE24(frame_tile_bytes + 6, width - 1); + PutLE24(frame_tile_bytes + 9, height - 1); + PutLE24(frame_tile_bytes + 12, duration - 1); + } + + frame_tile->bytes_ = frame_tile_bytes; + frame_tile->size_ = frame_tile_size; + return WEBP_MUX_OK; +} + +// Outputs image data given a bitstream. The bitstream can either be a +// single-image WebP file or raw VP8/VP8L data. +// Also outputs 'is_lossless' to be true if the given bitstream is lossless. +static WebPMuxError GetImageData(const WebPData* const bitstream, + WebPData* const image, WebPData* const alpha, + int* const is_lossless) { + WebPDataInit(alpha); // Default: no alpha. + if (bitstream->size_ < TAG_SIZE || + memcmp(bitstream->bytes_, "RIFF", TAG_SIZE)) { + // It is NOT webp file data. Return input data as is. + *image = *bitstream; + } else { + // It is webp file data. Extract image data from it. + const WebPMuxImage* wpi; + WebPMux* const mux = WebPMuxCreate(bitstream, 0); + if (mux == NULL) return WEBP_MUX_BAD_DATA; + wpi = mux->images_; + assert(wpi != NULL && wpi->img_ != NULL); + *image = wpi->img_->data_; + if (wpi->alpha_ != NULL) { + *alpha = wpi->alpha_->data_; + } + WebPMuxDelete(mux); + } + *is_lossless = VP8LCheckSignature(image->bytes_, image->size_); + return WEBP_MUX_OK; +} + +static WebPMuxError DeleteChunks(WebPChunk** chunk_list, uint32_t tag) { + WebPMuxError err = WEBP_MUX_NOT_FOUND; + assert(chunk_list); + while (*chunk_list) { + WebPChunk* const chunk = *chunk_list; + if (chunk->tag_ == tag) { + *chunk_list = ChunkDelete(chunk); + err = WEBP_MUX_OK; + } else { + chunk_list = &chunk->next_; + } + } + return err; +} + +static WebPMuxError MuxDeleteAllNamedData(WebPMux* const mux, CHUNK_INDEX idx) { + const WebPChunkId id = kChunks[idx].id; + WebPChunk** chunk_list; + + if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; + if (IsWPI(id)) return WEBP_MUX_INVALID_ARGUMENT; + + chunk_list = MuxGetChunkListFromId(mux, id); + if (chunk_list == NULL) return WEBP_MUX_INVALID_ARGUMENT; + + return DeleteChunks(chunk_list, kChunks[idx].tag); +} + +static WebPMuxError DeleteLoopCount(WebPMux* const mux) { + return MuxDeleteAllNamedData(mux, IDX_LOOP); +} + +//------------------------------------------------------------------------------ +// Set API(s). + +WebPMuxError WebPMuxSetImage(WebPMux* mux, + const WebPData* bitstream, int copy_data) { + WebPMuxError err; + WebPChunk chunk; + WebPMuxImage wpi; + WebPData image; + WebPData alpha; + int is_lossless; + int image_tag; + + if (mux == NULL || bitstream == NULL || bitstream->bytes_ == NULL || + bitstream->size_ > MAX_CHUNK_PAYLOAD) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // If given data is for a whole webp file, + // extract only the VP8/VP8L data from it. + err = GetImageData(bitstream, &image, &alpha, &is_lossless); + if (err != WEBP_MUX_OK) return err; + image_tag = is_lossless ? kChunks[IDX_VP8L].tag : kChunks[IDX_VP8].tag; + + // Delete the existing images. + MuxImageDeleteAll(&mux->images_); + + MuxImageInit(&wpi); + + if (alpha.bytes_ != NULL) { // Add alpha chunk. + ChunkInit(&chunk); + err = ChunkAssignData(&chunk, &alpha, copy_data, kChunks[IDX_ALPHA].tag); + if (err != WEBP_MUX_OK) goto Err; + err = ChunkSetNth(&chunk, &wpi.alpha_, 1); + if (err != WEBP_MUX_OK) goto Err; + } + + // Add image chunk. + ChunkInit(&chunk); + err = ChunkAssignData(&chunk, &image, copy_data, image_tag); + if (err != WEBP_MUX_OK) goto Err; + err = ChunkSetNth(&chunk, &wpi.img_, 1); + if (err != WEBP_MUX_OK) goto Err; + + // Add this image to mux. + err = MuxImagePush(&wpi, &mux->images_); + if (err != WEBP_MUX_OK) goto Err; + + // All OK. + return WEBP_MUX_OK; + + Err: + // Something bad happened. + ChunkRelease(&chunk); + MuxImageRelease(&wpi); + return err; +} + +WebPMuxError WebPMuxSetMetadata(WebPMux* mux, const WebPData* metadata, + int copy_data) { + WebPMuxError err; + + if (mux == NULL || metadata == NULL || metadata->bytes_ == NULL || + metadata->size_ > MAX_CHUNK_PAYLOAD) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // Delete the existing metadata chunk(s). + err = WebPMuxDeleteMetadata(mux); + if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; + + // Add the given metadata chunk. + return MuxSet(mux, IDX_META, 1, metadata, copy_data); +} + +WebPMuxError WebPMuxSetColorProfile(WebPMux* mux, const WebPData* color_profile, + int copy_data) { + WebPMuxError err; + + if (mux == NULL || color_profile == NULL || color_profile->bytes_ == NULL || + color_profile->size_ > MAX_CHUNK_PAYLOAD) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // Delete the existing ICCP chunk(s). + err = WebPMuxDeleteColorProfile(mux); + if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; + + // Add the given ICCP chunk. + return MuxSet(mux, IDX_ICCP, 1, color_profile, copy_data); +} + +WebPMuxError WebPMuxSetLoopCount(WebPMux* mux, int loop_count) { + WebPMuxError err; + uint8_t* data = NULL; + + if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; + if (loop_count >= MAX_LOOP_COUNT) return WEBP_MUX_INVALID_ARGUMENT; + + // Delete the existing LOOP chunk(s). + err = DeleteLoopCount(mux); + if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; + + // Add the given loop count. + data = (uint8_t*)malloc(kChunks[IDX_LOOP].size); + if (data == NULL) return WEBP_MUX_MEMORY_ERROR; + + PutLE16(data, loop_count); + err = MuxAddChunk(mux, 1, kChunks[IDX_LOOP].tag, data, + kChunks[IDX_LOOP].size, 1); + free(data); + return err; +} + +static WebPMuxError MuxPushFrameTileInternal( + WebPMux* const mux, const WebPData* const bitstream, int x_offset, + int y_offset, int duration, int copy_data, uint32_t tag) { + WebPChunk chunk; + WebPData image; + WebPData alpha; + WebPMuxImage wpi; + WebPMuxError err; + WebPData frame_tile; + const int is_frame = (tag == kChunks[IDX_FRAME].tag) ? 1 : 0; + int is_lossless; + int image_tag; + + // Sanity checks. + if (mux == NULL || bitstream == NULL || bitstream->bytes_ == NULL || + bitstream->size_ > MAX_CHUNK_PAYLOAD) { + return WEBP_MUX_INVALID_ARGUMENT; + } + if (x_offset < 0 || x_offset >= MAX_POSITION_OFFSET || + y_offset < 0 || y_offset >= MAX_POSITION_OFFSET || + duration <= 0 || duration > MAX_DURATION) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // Snap offsets to even positions. + x_offset &= ~1; + y_offset &= ~1; + + // If given data is for a whole webp file, + // extract only the VP8/VP8L data from it. + err = GetImageData(bitstream, &image, &alpha, &is_lossless); + if (err != WEBP_MUX_OK) return err; + image_tag = is_lossless ? kChunks[IDX_VP8L].tag : kChunks[IDX_VP8].tag; + + WebPDataInit(&frame_tile); + ChunkInit(&chunk); + MuxImageInit(&wpi); + + if (alpha.bytes_ != NULL) { + // Add alpha chunk. + err = ChunkAssignData(&chunk, &alpha, copy_data, kChunks[IDX_ALPHA].tag); + if (err != WEBP_MUX_OK) goto Err; + err = ChunkSetNth(&chunk, &wpi.alpha_, 1); + if (err != WEBP_MUX_OK) goto Err; + ChunkInit(&chunk); // chunk owned by wpi.alpha_ now. + } + + // Add image chunk. + err = ChunkAssignData(&chunk, &image, copy_data, image_tag); + if (err != WEBP_MUX_OK) goto Err; + err = ChunkSetNth(&chunk, &wpi.img_, 1); + if (err != WEBP_MUX_OK) goto Err; + ChunkInit(&chunk); // chunk owned by wpi.img_ now. + + // Create frame/tile data. + err = CreateFrameTileData(&image, x_offset, y_offset, duration, is_lossless, + is_frame, &frame_tile); + if (err != WEBP_MUX_OK) goto Err; + + // Add frame/tile chunk (with copy_data = 1). + err = ChunkAssignData(&chunk, &frame_tile, 1, tag); + if (err != WEBP_MUX_OK) goto Err; + WebPDataClear(&frame_tile); + err = ChunkSetNth(&chunk, &wpi.header_, 1); + if (err != WEBP_MUX_OK) goto Err; + ChunkInit(&chunk); // chunk owned by wpi.header_ now. + + // Add this WebPMuxImage to mux. + err = MuxImagePush(&wpi, &mux->images_); + if (err != WEBP_MUX_OK) goto Err; + + // All is well. + return WEBP_MUX_OK; + + Err: // Something bad happened. + WebPDataClear(&frame_tile); + ChunkRelease(&chunk); + MuxImageRelease(&wpi); + return err; +} + +WebPMuxError WebPMuxPushFrame(WebPMux* mux, const WebPData* bitstream, + int x_offset, int y_offset, + int duration, int copy_data) { + return MuxPushFrameTileInternal(mux, bitstream, x_offset, y_offset, + duration, copy_data, kChunks[IDX_FRAME].tag); +} + +WebPMuxError WebPMuxPushTile(WebPMux* mux, const WebPData* bitstream, + int x_offset, int y_offset, + int copy_data) { + return MuxPushFrameTileInternal(mux, bitstream, x_offset, y_offset, + 1 /* unused duration */, copy_data, + kChunks[IDX_TILE].tag); +} + +//------------------------------------------------------------------------------ +// Delete API(s). + +WebPMuxError WebPMuxDeleteImage(WebPMux* mux) { + WebPMuxError err; + + if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; + + err = MuxValidateForImage(mux); + if (err != WEBP_MUX_OK) return err; + + // All well, delete image. + MuxImageDeleteAll(&mux->images_); + return WEBP_MUX_OK; +} + +WebPMuxError WebPMuxDeleteMetadata(WebPMux* mux) { + return MuxDeleteAllNamedData(mux, IDX_META); +} + +WebPMuxError WebPMuxDeleteColorProfile(WebPMux* mux) { + return MuxDeleteAllNamedData(mux, IDX_ICCP); +} + +static WebPMuxError DeleteFrameTileInternal(WebPMux* const mux, uint32_t nth, + CHUNK_INDEX idx) { + const WebPChunkId id = kChunks[idx].id; + if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; + + assert(idx == IDX_FRAME || idx == IDX_TILE); + return MuxImageDeleteNth(&mux->images_, nth, id); +} + +WebPMuxError WebPMuxDeleteFrame(WebPMux* mux, uint32_t nth) { + return DeleteFrameTileInternal(mux, nth, IDX_FRAME); +} + +WebPMuxError WebPMuxDeleteTile(WebPMux* mux, uint32_t nth) { + return DeleteFrameTileInternal(mux, nth, IDX_TILE); +} + +//------------------------------------------------------------------------------ +// Assembly of the WebP RIFF file. + +static WebPMuxError GetFrameTileInfo(const WebPChunk* const frame_tile_chunk, + int* const x_offset, int* const y_offset, + int* const duration) { + const uint32_t tag = frame_tile_chunk->tag_; + const int is_frame = (tag == kChunks[IDX_FRAME].tag); + const WebPData* const data = &frame_tile_chunk->data_; + const size_t expected_data_size = + is_frame ? FRAME_CHUNK_SIZE : TILE_CHUNK_SIZE; + assert(frame_tile_chunk != NULL); + assert(tag == kChunks[IDX_FRAME].tag || tag == kChunks[IDX_TILE].tag); + if (data->size_ != expected_data_size) return WEBP_MUX_INVALID_ARGUMENT; + + *x_offset = 2 * GetLE24(data->bytes_ + 0); + *y_offset = 2 * GetLE24(data->bytes_ + 3); + if (is_frame) *duration = 1 + GetLE24(data->bytes_ + 12); + return WEBP_MUX_OK; +} + +WebPMuxError MuxGetImageWidthHeight(const WebPChunk* const image_chunk, + int* const width, int* const height) { + const uint32_t tag = image_chunk->tag_; + const WebPData* const data = &image_chunk->data_; + int w, h; + int ok; + assert(image_chunk != NULL); + assert(tag == kChunks[IDX_VP8].tag || tag == kChunks[IDX_VP8L].tag); + ok = (tag == kChunks[IDX_VP8].tag) ? + VP8GetInfo(data->bytes_, data->size_, data->size_, &w, &h) : + VP8LGetInfo(data->bytes_, data->size_, &w, &h, NULL); + if (ok) { + *width = w; + *height = h; + return WEBP_MUX_OK; + } else { + return WEBP_MUX_BAD_DATA; + } +} + +static WebPMuxError GetImageInfo(const WebPMuxImage* const wpi, + int* const x_offset, int* const y_offset, + int* const duration, + int* const width, int* const height) { + const WebPChunk* const image_chunk = wpi->img_; + const WebPChunk* const frame_tile_chunk = wpi->header_; + + // Get offsets and duration from FRM/TILE chunk. + const WebPMuxError err = + GetFrameTileInfo(frame_tile_chunk, x_offset, y_offset, duration); + if (err != WEBP_MUX_OK) return err; + + // Get width and height from VP8/VP8L chunk. + return MuxGetImageWidthHeight(image_chunk, width, height); +} + +static WebPMuxError GetImageCanvasWidthHeight( + const WebPMux* const mux, uint32_t flags, + int* const width, int* const height) { + WebPMuxImage* wpi = NULL; + assert(mux != NULL); + assert(width != NULL && height != NULL); + + wpi = mux->images_; + assert(wpi != NULL); + assert(wpi->img_ != NULL); + + if (wpi->next_) { + int max_x = 0; + int max_y = 0; + int64_t image_area = 0; + // Aggregate the bounding box for animation frames & tiled images. + for (; wpi != NULL; wpi = wpi->next_) { + int x_offset, y_offset, duration, w, h; + const WebPMuxError err = GetImageInfo(wpi, &x_offset, &y_offset, + &duration, &w, &h); + const int max_x_pos = x_offset + w; + const int max_y_pos = y_offset + h; + if (err != WEBP_MUX_OK) return err; + assert(x_offset < MAX_POSITION_OFFSET); + assert(y_offset < MAX_POSITION_OFFSET); + + if (max_x_pos > max_x) max_x = max_x_pos; + if (max_y_pos > max_y) max_y = max_y_pos; + image_area += w * h; + } + *width = max_x; + *height = max_y; + // Crude check to validate that there are no image overlaps/holes for tile + // images. Check that the aggregated image area for individual tiles exactly + // matches the image area of the constructed canvas. However, the area-match + // is necessary but not sufficient condition. + if ((flags & TILE_FLAG) && (image_area != (max_x * max_y))) { + *width = 0; + *height = 0; + return WEBP_MUX_INVALID_ARGUMENT; + } + } else { + // For a single image, extract the width & height from VP8/VP8L image-data. + int w, h; + const WebPChunk* const image_chunk = wpi->img_; + const WebPMuxError err = MuxGetImageWidthHeight(image_chunk, &w, &h); + if (err != WEBP_MUX_OK) return err; + *width = w; + *height = h; + } + return WEBP_MUX_OK; +} + +// VP8X format: +// Total Size : 10, +// Flags : 4 bytes, +// Width : 3 bytes, +// Height : 3 bytes. +static WebPMuxError CreateVP8XChunk(WebPMux* const mux) { + WebPMuxError err = WEBP_MUX_OK; + uint32_t flags = 0; + int width = 0; + int height = 0; + uint8_t data[VP8X_CHUNK_SIZE]; + const size_t data_size = VP8X_CHUNK_SIZE; + const WebPMuxImage* images = NULL; + + assert(mux != NULL); + images = mux->images_; // First image. + if (images == NULL || images->img_ == NULL || + images->img_->data_.bytes_ == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // If VP8X chunk(s) is(are) already present, remove them (and later add new + // VP8X chunk with updated flags). + err = MuxDeleteAllNamedData(mux, IDX_VP8X); + if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; + + // Set flags. + if (mux->iccp_ != NULL && mux->iccp_->data_.bytes_ != NULL) { + flags |= ICCP_FLAG; + } + + if (mux->meta_ != NULL && mux->meta_->data_.bytes_ != NULL) { + flags |= META_FLAG; + } + + if (images->header_ != NULL) { + if (images->header_->tag_ == kChunks[IDX_TILE].tag) { + // This is a tiled image. + flags |= TILE_FLAG; + } else if (images->header_->tag_ == kChunks[IDX_FRAME].tag) { + // This is an image with animation. + flags |= ANIMATION_FLAG; + } + } + + if (MuxImageCount(images, WEBP_CHUNK_ALPHA) > 0) { + flags |= ALPHA_FLAG; // Some images have an alpha channel. + } + + if (flags == 0) { + // For Simple Image, VP8X chunk should not be added. + return WEBP_MUX_OK; + } + + err = GetImageCanvasWidthHeight(mux, flags, &width, &height); + if (err != WEBP_MUX_OK) return err; + + if (width <= 0 || height <= 0) { + return WEBP_MUX_INVALID_ARGUMENT; + } + if (width > MAX_CANVAS_SIZE || height > MAX_CANVAS_SIZE) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + if (MuxHasLosslessImages(images)) { + // We have a file with a VP8X chunk having some lossless images. + // As lossless images implicitly contain alpha, force ALPHA_FLAG to be true. + // Note: This 'flags' update must NOT be done for a lossless image + // without a VP8X chunk! + flags |= ALPHA_FLAG; + } + + PutLE32(data + 0, flags); // VP8X chunk flags. + PutLE24(data + 4, width - 1); // canvas width. + PutLE24(data + 7, height - 1); // canvas height. + + err = MuxAddChunk(mux, 1, kChunks[IDX_VP8X].tag, data, data_size, 1); + return err; +} + +WebPMuxError WebPMuxAssemble(WebPMux* mux, WebPData* assembled_data) { + size_t size = 0; + uint8_t* data = NULL; + uint8_t* dst = NULL; + int num_frames; + int num_loop_chunks; + WebPMuxError err; + + if (mux == NULL || assembled_data == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // Remove LOOP chunk if unnecessary. + err = WebPMuxNumChunks(mux, kChunks[IDX_LOOP].id, &num_loop_chunks); + if (err != WEBP_MUX_OK) return err; + if (num_loop_chunks >= 1) { + err = WebPMuxNumChunks(mux, kChunks[IDX_FRAME].id, &num_frames); + if (err != WEBP_MUX_OK) return err; + if (num_frames == 0) { + err = DeleteLoopCount(mux); + if (err != WEBP_MUX_OK) return err; + } + } + + // Create VP8X chunk. + err = CreateVP8XChunk(mux); + if (err != WEBP_MUX_OK) return err; + + // Allocate data. + size = ChunksListDiskSize(mux->vp8x_) + ChunksListDiskSize(mux->iccp_) + + ChunksListDiskSize(mux->loop_) + MuxImageListDiskSize(mux->images_) + + ChunksListDiskSize(mux->meta_) + ChunksListDiskSize(mux->unknown_) + + RIFF_HEADER_SIZE; + + data = (uint8_t*)malloc(size); + if (data == NULL) return WEBP_MUX_MEMORY_ERROR; + + // Emit header & chunks. + dst = MuxEmitRiffHeader(data, size); + dst = ChunkListEmit(mux->vp8x_, dst); + dst = ChunkListEmit(mux->iccp_, dst); + dst = ChunkListEmit(mux->loop_, dst); + dst = MuxImageListEmit(mux->images_, dst); + dst = ChunkListEmit(mux->meta_, dst); + dst = ChunkListEmit(mux->unknown_, dst); + assert(dst == data + size); + + // Validate mux. + err = MuxValidate(mux); + if (err != WEBP_MUX_OK) { + free(data); + data = NULL; + size = 0; + } + + // Finalize. + assembled_data->bytes_ = data; + assembled_data->size_ = size; + + return err; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/mux/muxi.h b/drivers/webpold/mux/muxi.h new file mode 100644 index 0000000000..2f06f3ed03 --- /dev/null +++ b/drivers/webpold/mux/muxi.h @@ -0,0 +1,271 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Internal header for mux library. +// +// Author: Urvang (urvang@google.com) + +#ifndef WEBP_MUX_MUXI_H_ +#define WEBP_MUX_MUXI_H_ + +#include <stdlib.h> +#include "../dec/vp8i.h" +#include "../dec/vp8li.h" +#include "../format_constants.h" +#include "../mux.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Defines and constants. + +// Chunk object. +typedef struct WebPChunk WebPChunk; +struct WebPChunk { + uint32_t tag_; + int owner_; // True if *data_ memory is owned internally. + // VP8X, Loop, and other internally created chunks + // like frame/tile are always owned. + WebPData data_; + WebPChunk* next_; +}; + +// MuxImage object. Store a full webp image (including frame/tile chunk, alpha +// chunk and VP8/VP8L chunk), +typedef struct WebPMuxImage WebPMuxImage; +struct WebPMuxImage { + WebPChunk* header_; // Corresponds to WEBP_CHUNK_FRAME/WEBP_CHUNK_TILE. + WebPChunk* alpha_; // Corresponds to WEBP_CHUNK_ALPHA. + WebPChunk* img_; // Corresponds to WEBP_CHUNK_IMAGE. + int is_partial_; // True if only some of the chunks are filled. + WebPMuxImage* next_; +}; + +// Main mux object. Stores data chunks. +struct WebPMux { + WebPMuxImage* images_; + WebPChunk* iccp_; + WebPChunk* meta_; + WebPChunk* loop_; + WebPChunk* vp8x_; + + WebPChunk* unknown_; +}; + +// CHUNK_INDEX enum: used for indexing within 'kChunks' (defined below) only. +// Note: the reason for having two enums ('WebPChunkId' and 'CHUNK_INDEX') is to +// allow two different chunks to have the same id (e.g. WebPChunkId +// 'WEBP_CHUNK_IMAGE' can correspond to CHUNK_INDEX 'IDX_VP8' or 'IDX_VP8L'). +typedef enum { + IDX_VP8X = 0, + IDX_ICCP, + IDX_LOOP, + IDX_FRAME, + IDX_TILE, + IDX_ALPHA, + IDX_VP8, + IDX_VP8L, + IDX_META, + IDX_UNKNOWN, + + IDX_NIL, + IDX_LAST_CHUNK +} CHUNK_INDEX; + +#define NIL_TAG 0x00000000u // To signal void chunk. + +#define MKFOURCC(a, b, c, d) ((uint32_t)(a) | (b) << 8 | (c) << 16 | (d) << 24) + +typedef struct { + uint32_t tag; + WebPChunkId id; + uint32_t size; +} ChunkInfo; + +extern const ChunkInfo kChunks[IDX_LAST_CHUNK]; + +//------------------------------------------------------------------------------ +// Helper functions. + +// Read 16, 24 or 32 bits stored in little-endian order. +static WEBP_INLINE int GetLE16(const uint8_t* const data) { + return (int)(data[0] << 0) | (data[1] << 8); +} + +static WEBP_INLINE int GetLE24(const uint8_t* const data) { + return GetLE16(data) | (data[2] << 16); +} + +static WEBP_INLINE uint32_t GetLE32(const uint8_t* const data) { + return (uint32_t)GetLE16(data) | (GetLE16(data + 2) << 16); +} + +// Store 16, 24 or 32 bits in little-endian order. +static WEBP_INLINE void PutLE16(uint8_t* const data, int val) { + assert(val < (1 << 16)); + data[0] = (val >> 0); + data[1] = (val >> 8); +} + +static WEBP_INLINE void PutLE24(uint8_t* const data, int val) { + assert(val < (1 << 24)); + PutLE16(data, val & 0xffff); + data[2] = (val >> 16); +} + +static WEBP_INLINE void PutLE32(uint8_t* const data, uint32_t val) { + PutLE16(data, (int)(val & 0xffff)); + PutLE16(data + 2, (int)(val >> 16)); +} + +static WEBP_INLINE size_t SizeWithPadding(size_t chunk_size) { + return CHUNK_HEADER_SIZE + ((chunk_size + 1) & ~1U); +} + +//------------------------------------------------------------------------------ +// Chunk object management. + +// Initialize. +void ChunkInit(WebPChunk* const chunk); + +// Get chunk index from chunk tag. Returns IDX_NIL if not found. +CHUNK_INDEX ChunkGetIndexFromTag(uint32_t tag); + +// Get chunk id from chunk tag. Returns WEBP_CHUNK_NIL if not found. +WebPChunkId ChunkGetIdFromTag(uint32_t tag); + +// Search for nth chunk with given 'tag' in the chunk list. +// nth = 0 means "last of the list". +WebPChunk* ChunkSearchList(WebPChunk* first, uint32_t nth, uint32_t tag); + +// Fill the chunk with the given data. +WebPMuxError ChunkAssignData(WebPChunk* chunk, const WebPData* const data, + int copy_data, uint32_t tag); + +// Sets 'chunk' at nth position in the 'chunk_list'. +// nth = 0 has the special meaning "last of the list". +WebPMuxError ChunkSetNth(const WebPChunk* chunk, WebPChunk** chunk_list, + uint32_t nth); + +// Releases chunk and returns chunk->next_. +WebPChunk* ChunkRelease(WebPChunk* const chunk); + +// Deletes given chunk & returns chunk->next_. +WebPChunk* ChunkDelete(WebPChunk* const chunk); + +// Size of a chunk including header and padding. +static WEBP_INLINE size_t ChunkDiskSize(const WebPChunk* chunk) { + const size_t data_size = chunk->data_.size_; + assert(data_size < MAX_CHUNK_PAYLOAD); + return SizeWithPadding(data_size); +} + +// Total size of a list of chunks. +size_t ChunksListDiskSize(const WebPChunk* chunk_list); + +// Write out the given list of chunks into 'dst'. +uint8_t* ChunkListEmit(const WebPChunk* chunk_list, uint8_t* dst); + +// Get the width & height of image stored in 'image_chunk'. +WebPMuxError MuxGetImageWidthHeight(const WebPChunk* const image_chunk, + int* const width, int* const height); + +//------------------------------------------------------------------------------ +// MuxImage object management. + +// Initialize. +void MuxImageInit(WebPMuxImage* const wpi); + +// Releases image 'wpi' and returns wpi->next. +WebPMuxImage* MuxImageRelease(WebPMuxImage* const wpi); + +// Delete image 'wpi' and return the next image in the list or NULL. +// 'wpi' can be NULL. +WebPMuxImage* MuxImageDelete(WebPMuxImage* const wpi); + +// Delete all images in 'wpi_list'. +void MuxImageDeleteAll(WebPMuxImage** const wpi_list); + +// Count number of images matching the given tag id in the 'wpi_list'. +int MuxImageCount(const WebPMuxImage* wpi_list, WebPChunkId id); + +// Check if given ID corresponds to an image related chunk. +static WEBP_INLINE int IsWPI(WebPChunkId id) { + switch (id) { + case WEBP_CHUNK_FRAME: + case WEBP_CHUNK_TILE: + case WEBP_CHUNK_ALPHA: + case WEBP_CHUNK_IMAGE: return 1; + default: return 0; + } +} + +// Get a reference to appropriate chunk list within an image given chunk tag. +static WEBP_INLINE WebPChunk** MuxImageGetListFromId( + const WebPMuxImage* const wpi, WebPChunkId id) { + assert(wpi != NULL); + switch (id) { + case WEBP_CHUNK_FRAME: + case WEBP_CHUNK_TILE: return (WebPChunk**)&wpi->header_; + case WEBP_CHUNK_ALPHA: return (WebPChunk**)&wpi->alpha_; + case WEBP_CHUNK_IMAGE: return (WebPChunk**)&wpi->img_; + default: return NULL; + } +} + +// Pushes 'wpi' at the end of 'wpi_list'. +WebPMuxError MuxImagePush(const WebPMuxImage* wpi, WebPMuxImage** wpi_list); + +// Delete nth image in the image list with given tag id. +WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth, + WebPChunkId id); + +// Get nth image in the image list with given tag id. +WebPMuxError MuxImageGetNth(const WebPMuxImage** wpi_list, uint32_t nth, + WebPChunkId id, WebPMuxImage** wpi); + +// Total size of the given image. +size_t MuxImageDiskSize(const WebPMuxImage* const wpi); + +// Total size of a list of images. +size_t MuxImageListDiskSize(const WebPMuxImage* wpi_list); + +// Write out the given image into 'dst'. +uint8_t* MuxImageEmit(const WebPMuxImage* const wpi, uint8_t* dst); + +// Write out the given list of images into 'dst'. +uint8_t* MuxImageListEmit(const WebPMuxImage* wpi_list, uint8_t* dst); + +//------------------------------------------------------------------------------ +// Helper methods for mux. + +// Checks if the given image list contains at least one lossless image. +int MuxHasLosslessImages(const WebPMuxImage* images); + +// Write out RIFF header into 'data', given total data size 'size'. +uint8_t* MuxEmitRiffHeader(uint8_t* const data, size_t size); + +// Returns the list where chunk with given ID is to be inserted in mux. +// Return value is NULL if this chunk should be inserted in mux->images_ list +// or if 'id' is not known. +WebPChunk** MuxGetChunkListFromId(const WebPMux* mux, WebPChunkId id); + +// Validates that the given mux has a single image. +WebPMuxError MuxValidateForImage(const WebPMux* const mux); + +// Validates the given mux object. +WebPMuxError MuxValidate(const WebPMux* const mux); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_MUX_MUXI_H_ */ diff --git a/drivers/webpold/mux/muxinternal.c b/drivers/webpold/mux/muxinternal.c new file mode 100644 index 0000000000..6c3c4fe60a --- /dev/null +++ b/drivers/webpold/mux/muxinternal.c @@ -0,0 +1,576 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Internal objects and utils for mux. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +#include <assert.h> +#include "./muxi.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define UNDEFINED_CHUNK_SIZE (-1) + +const ChunkInfo kChunks[] = { + { MKFOURCC('V', 'P', '8', 'X'), WEBP_CHUNK_VP8X, VP8X_CHUNK_SIZE }, + { MKFOURCC('I', 'C', 'C', 'P'), WEBP_CHUNK_ICCP, UNDEFINED_CHUNK_SIZE }, + { MKFOURCC('L', 'O', 'O', 'P'), WEBP_CHUNK_LOOP, LOOP_CHUNK_SIZE }, + { MKFOURCC('F', 'R', 'M', ' '), WEBP_CHUNK_FRAME, FRAME_CHUNK_SIZE }, + { MKFOURCC('T', 'I', 'L', 'E'), WEBP_CHUNK_TILE, TILE_CHUNK_SIZE }, + { MKFOURCC('A', 'L', 'P', 'H'), WEBP_CHUNK_ALPHA, UNDEFINED_CHUNK_SIZE }, + { MKFOURCC('V', 'P', '8', ' '), WEBP_CHUNK_IMAGE, UNDEFINED_CHUNK_SIZE }, + { MKFOURCC('V', 'P', '8', 'L'), WEBP_CHUNK_IMAGE, UNDEFINED_CHUNK_SIZE }, + { MKFOURCC('M', 'E', 'T', 'A'), WEBP_CHUNK_META, UNDEFINED_CHUNK_SIZE }, + { MKFOURCC('U', 'N', 'K', 'N'), WEBP_CHUNK_UNKNOWN, UNDEFINED_CHUNK_SIZE }, + + { NIL_TAG, WEBP_CHUNK_NIL, UNDEFINED_CHUNK_SIZE } +}; + +//------------------------------------------------------------------------------ +// Life of a chunk object. + +void ChunkInit(WebPChunk* const chunk) { + assert(chunk); + memset(chunk, 0, sizeof(*chunk)); + chunk->tag_ = NIL_TAG; +} + +WebPChunk* ChunkRelease(WebPChunk* const chunk) { + WebPChunk* next; + if (chunk == NULL) return NULL; + if (chunk->owner_) { + WebPDataClear(&chunk->data_); + } + next = chunk->next_; + ChunkInit(chunk); + return next; +} + +//------------------------------------------------------------------------------ +// Chunk misc methods. + +CHUNK_INDEX ChunkGetIndexFromTag(uint32_t tag) { + int i; + for (i = 0; kChunks[i].tag != NIL_TAG; ++i) { + if (tag == kChunks[i].tag) return i; + } + return IDX_NIL; +} + +WebPChunkId ChunkGetIdFromTag(uint32_t tag) { + int i; + for (i = 0; kChunks[i].tag != NIL_TAG; ++i) { + if (tag == kChunks[i].tag) return kChunks[i].id; + } + return WEBP_CHUNK_NIL; +} + +//------------------------------------------------------------------------------ +// Chunk search methods. + +// Returns next chunk in the chunk list with the given tag. +static WebPChunk* ChunkSearchNextInList(WebPChunk* chunk, uint32_t tag) { + while (chunk && chunk->tag_ != tag) { + chunk = chunk->next_; + } + return chunk; +} + +WebPChunk* ChunkSearchList(WebPChunk* first, uint32_t nth, uint32_t tag) { + uint32_t iter = nth; + first = ChunkSearchNextInList(first, tag); + if (!first) return NULL; + + while (--iter != 0) { + WebPChunk* next_chunk = ChunkSearchNextInList(first->next_, tag); + if (next_chunk == NULL) break; + first = next_chunk; + } + return ((nth > 0) && (iter > 0)) ? NULL : first; +} + +// Outputs a pointer to 'prev_chunk->next_', +// where 'prev_chunk' is the pointer to the chunk at position (nth - 1). +// Returns 1 if nth chunk was found, 0 otherwise. +static int ChunkSearchListToSet(WebPChunk** chunk_list, uint32_t nth, + WebPChunk*** const location) { + uint32_t count = 0; + assert(chunk_list); + *location = chunk_list; + + while (*chunk_list) { + WebPChunk* const cur_chunk = *chunk_list; + ++count; + if (count == nth) return 1; // Found. + chunk_list = &cur_chunk->next_; + *location = chunk_list; + } + + // *chunk_list is ok to be NULL if adding at last location. + return (nth == 0 || (count == nth - 1)) ? 1 : 0; +} + +//------------------------------------------------------------------------------ +// Chunk writer methods. + +WebPMuxError ChunkAssignData(WebPChunk* chunk, const WebPData* const data, + int copy_data, uint32_t tag) { + // For internally allocated chunks, always copy data & make it owner of data. + if (tag == kChunks[IDX_VP8X].tag || tag == kChunks[IDX_LOOP].tag) { + copy_data = 1; + } + + ChunkRelease(chunk); + + if (data != NULL) { + if (copy_data) { + // Copy data. + chunk->data_.bytes_ = (uint8_t*)malloc(data->size_); + if (chunk->data_.bytes_ == NULL) return WEBP_MUX_MEMORY_ERROR; + memcpy((uint8_t*)chunk->data_.bytes_, data->bytes_, data->size_); + chunk->data_.size_ = data->size_; + + // Chunk is owner of data. + chunk->owner_ = 1; + } else { + // Don't copy data. + chunk->data_ = *data; + } + } + + chunk->tag_ = tag; + + return WEBP_MUX_OK; +} + +WebPMuxError ChunkSetNth(const WebPChunk* chunk, WebPChunk** chunk_list, + uint32_t nth) { + WebPChunk* new_chunk; + + if (!ChunkSearchListToSet(chunk_list, nth, &chunk_list)) { + return WEBP_MUX_NOT_FOUND; + } + + new_chunk = (WebPChunk*)malloc(sizeof(*new_chunk)); + if (new_chunk == NULL) return WEBP_MUX_MEMORY_ERROR; + *new_chunk = *chunk; + new_chunk->next_ = *chunk_list; + *chunk_list = new_chunk; + return WEBP_MUX_OK; +} + +//------------------------------------------------------------------------------ +// Chunk deletion method(s). + +WebPChunk* ChunkDelete(WebPChunk* const chunk) { + WebPChunk* const next = ChunkRelease(chunk); + free(chunk); + return next; +} + +//------------------------------------------------------------------------------ +// Chunk serialization methods. + +size_t ChunksListDiskSize(const WebPChunk* chunk_list) { + size_t size = 0; + while (chunk_list) { + size += ChunkDiskSize(chunk_list); + chunk_list = chunk_list->next_; + } + return size; +} + +static uint8_t* ChunkEmit(const WebPChunk* const chunk, uint8_t* dst) { + const size_t chunk_size = chunk->data_.size_; + assert(chunk); + assert(chunk->tag_ != NIL_TAG); + PutLE32(dst + 0, chunk->tag_); + PutLE32(dst + TAG_SIZE, (uint32_t)chunk_size); + assert(chunk_size == (uint32_t)chunk_size); + memcpy(dst + CHUNK_HEADER_SIZE, chunk->data_.bytes_, chunk_size); + if (chunk_size & 1) + dst[CHUNK_HEADER_SIZE + chunk_size] = 0; // Add padding. + return dst + ChunkDiskSize(chunk); +} + +uint8_t* ChunkListEmit(const WebPChunk* chunk_list, uint8_t* dst) { + while (chunk_list) { + dst = ChunkEmit(chunk_list, dst); + chunk_list = chunk_list->next_; + } + return dst; +} + +//------------------------------------------------------------------------------ +// Manipulation of a WebPData object. + +void WebPDataInit(WebPData* webp_data) { + if (webp_data != NULL) { + memset(webp_data, 0, sizeof(*webp_data)); + } +} + +void WebPDataClear(WebPData* webp_data) { + if (webp_data != NULL) { + free((void*)webp_data->bytes_); + WebPDataInit(webp_data); + } +} + +int WebPDataCopy(const WebPData* src, WebPData* dst) { + if (src == NULL || dst == NULL) return 0; + + WebPDataInit(dst); + if (src->bytes_ != NULL && src->size_ != 0) { + dst->bytes_ = (uint8_t*)malloc(src->size_); + if (dst->bytes_ == NULL) return 0; + memcpy((void*)dst->bytes_, src->bytes_, src->size_); + dst->size_ = src->size_; + } + return 1; +} + +//------------------------------------------------------------------------------ +// Life of a MuxImage object. + +void MuxImageInit(WebPMuxImage* const wpi) { + assert(wpi); + memset(wpi, 0, sizeof(*wpi)); +} + +WebPMuxImage* MuxImageRelease(WebPMuxImage* const wpi) { + WebPMuxImage* next; + if (wpi == NULL) return NULL; + ChunkDelete(wpi->header_); + ChunkDelete(wpi->alpha_); + ChunkDelete(wpi->img_); + + next = wpi->next_; + MuxImageInit(wpi); + return next; +} + +//------------------------------------------------------------------------------ +// MuxImage search methods. + +int MuxImageCount(const WebPMuxImage* wpi_list, WebPChunkId id) { + int count = 0; + const WebPMuxImage* current; + for (current = wpi_list; current != NULL; current = current->next_) { + const WebPChunk* const wpi_chunk = *MuxImageGetListFromId(current, id); + if (wpi_chunk != NULL) { + const WebPChunkId wpi_chunk_id = ChunkGetIdFromTag(wpi_chunk->tag_); + if (wpi_chunk_id == id) ++count; + } + } + return count; +} + +// Outputs a pointer to 'prev_wpi->next_', +// where 'prev_wpi' is the pointer to the image at position (nth - 1). +// Returns 1 if nth image with given id was found, 0 otherwise. +static int SearchImageToGetOrDelete(WebPMuxImage** wpi_list, uint32_t nth, + WebPChunkId id, + WebPMuxImage*** const location) { + uint32_t count = 0; + assert(wpi_list); + *location = wpi_list; + + // Search makes sense only for the following. + assert(id == WEBP_CHUNK_FRAME || id == WEBP_CHUNK_TILE || + id == WEBP_CHUNK_IMAGE); + assert(id != WEBP_CHUNK_IMAGE || nth == 1); + + if (nth == 0) { + nth = MuxImageCount(*wpi_list, id); + if (nth == 0) return 0; // Not found. + } + + while (*wpi_list) { + WebPMuxImage* const cur_wpi = *wpi_list; + const WebPChunk* const wpi_chunk = *MuxImageGetListFromId(cur_wpi, id); + if (wpi_chunk != NULL) { + const WebPChunkId wpi_chunk_id = ChunkGetIdFromTag(wpi_chunk->tag_); + if (wpi_chunk_id == id) { + ++count; + if (count == nth) return 1; // Found. + } + } + wpi_list = &cur_wpi->next_; + *location = wpi_list; + } + return 0; // Not found. +} + +//------------------------------------------------------------------------------ +// MuxImage writer methods. + +WebPMuxError MuxImagePush(const WebPMuxImage* wpi, WebPMuxImage** wpi_list) { + WebPMuxImage* new_wpi; + + while (*wpi_list != NULL) { + WebPMuxImage* const cur_wpi = *wpi_list; + if (cur_wpi->next_ == NULL) break; + wpi_list = &cur_wpi->next_; + } + + new_wpi = (WebPMuxImage*)malloc(sizeof(*new_wpi)); + if (new_wpi == NULL) return WEBP_MUX_MEMORY_ERROR; + *new_wpi = *wpi; + new_wpi->next_ = NULL; + + if (*wpi_list != NULL) { + (*wpi_list)->next_ = new_wpi; + } else { + *wpi_list = new_wpi; + } + return WEBP_MUX_OK; +} + +//------------------------------------------------------------------------------ +// MuxImage deletion methods. + +WebPMuxImage* MuxImageDelete(WebPMuxImage* const wpi) { + // Delete the components of wpi. If wpi is NULL this is a noop. + WebPMuxImage* const next = MuxImageRelease(wpi); + free(wpi); + return next; +} + +void MuxImageDeleteAll(WebPMuxImage** const wpi_list) { + while (*wpi_list) { + *wpi_list = MuxImageDelete(*wpi_list); + } +} + +WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth, + WebPChunkId id) { + assert(wpi_list); + if (!SearchImageToGetOrDelete(wpi_list, nth, id, &wpi_list)) { + return WEBP_MUX_NOT_FOUND; + } + *wpi_list = MuxImageDelete(*wpi_list); + return WEBP_MUX_OK; +} + +//------------------------------------------------------------------------------ +// MuxImage reader methods. + +WebPMuxError MuxImageGetNth(const WebPMuxImage** wpi_list, uint32_t nth, + WebPChunkId id, WebPMuxImage** wpi) { + assert(wpi_list); + assert(wpi); + if (!SearchImageToGetOrDelete((WebPMuxImage**)wpi_list, nth, id, + (WebPMuxImage***)&wpi_list)) { + return WEBP_MUX_NOT_FOUND; + } + *wpi = (WebPMuxImage*)*wpi_list; + return WEBP_MUX_OK; +} + +//------------------------------------------------------------------------------ +// MuxImage serialization methods. + +// Size of an image. +size_t MuxImageDiskSize(const WebPMuxImage* const wpi) { + size_t size = 0; + if (wpi->header_ != NULL) size += ChunkDiskSize(wpi->header_); + if (wpi->alpha_ != NULL) size += ChunkDiskSize(wpi->alpha_); + if (wpi->img_ != NULL) size += ChunkDiskSize(wpi->img_); + return size; +} + +size_t MuxImageListDiskSize(const WebPMuxImage* wpi_list) { + size_t size = 0; + while (wpi_list) { + size += MuxImageDiskSize(wpi_list); + wpi_list = wpi_list->next_; + } + return size; +} + +uint8_t* MuxImageEmit(const WebPMuxImage* const wpi, uint8_t* dst) { + // Ordering of chunks to be emitted is strictly as follows: + // 1. Frame/Tile chunk (if present). + // 2. Alpha chunk (if present). + // 3. VP8/VP8L chunk. + assert(wpi); + if (wpi->header_ != NULL) dst = ChunkEmit(wpi->header_, dst); + if (wpi->alpha_ != NULL) dst = ChunkEmit(wpi->alpha_, dst); + if (wpi->img_ != NULL) dst = ChunkEmit(wpi->img_, dst); + return dst; +} + +uint8_t* MuxImageListEmit(const WebPMuxImage* wpi_list, uint8_t* dst) { + while (wpi_list) { + dst = MuxImageEmit(wpi_list, dst); + wpi_list = wpi_list->next_; + } + return dst; +} + +//------------------------------------------------------------------------------ +// Helper methods for mux. + +int MuxHasLosslessImages(const WebPMuxImage* images) { + while (images != NULL) { + assert(images->img_ != NULL); + if (images->img_->tag_ == kChunks[IDX_VP8L].tag) { + return 1; + } + images = images->next_; + } + return 0; +} + +uint8_t* MuxEmitRiffHeader(uint8_t* const data, size_t size) { + PutLE32(data + 0, MKFOURCC('R', 'I', 'F', 'F')); + PutLE32(data + TAG_SIZE, (uint32_t)size - CHUNK_HEADER_SIZE); + assert(size == (uint32_t)size); + PutLE32(data + TAG_SIZE + CHUNK_SIZE_BYTES, MKFOURCC('W', 'E', 'B', 'P')); + return data + RIFF_HEADER_SIZE; +} + +WebPChunk** MuxGetChunkListFromId(const WebPMux* mux, WebPChunkId id) { + assert(mux != NULL); + switch(id) { + case WEBP_CHUNK_VP8X: return (WebPChunk**)&mux->vp8x_; + case WEBP_CHUNK_ICCP: return (WebPChunk**)&mux->iccp_; + case WEBP_CHUNK_LOOP: return (WebPChunk**)&mux->loop_; + case WEBP_CHUNK_META: return (WebPChunk**)&mux->meta_; + case WEBP_CHUNK_UNKNOWN: return (WebPChunk**)&mux->unknown_; + default: return NULL; + } +} + +WebPMuxError MuxValidateForImage(const WebPMux* const mux) { + const int num_images = MuxImageCount(mux->images_, WEBP_CHUNK_IMAGE); + const int num_frames = MuxImageCount(mux->images_, WEBP_CHUNK_FRAME); + const int num_tiles = MuxImageCount(mux->images_, WEBP_CHUNK_TILE); + + if (num_images == 0) { + // No images in mux. + return WEBP_MUX_NOT_FOUND; + } else if (num_images == 1 && num_frames == 0 && num_tiles == 0) { + // Valid case (single image). + return WEBP_MUX_OK; + } else { + // Frame/Tile case OR an invalid mux. + return WEBP_MUX_INVALID_ARGUMENT; + } +} + +static int IsNotCompatible(int feature, int num_items) { + return (feature != 0) != (num_items > 0); +} + +#define NO_FLAG 0 + +// Test basic constraints: +// retrieval, maximum number of chunks by index (use -1 to skip) +// and feature incompatibility (use NO_FLAG to skip). +// On success returns WEBP_MUX_OK and stores the chunk count in *num. +static WebPMuxError ValidateChunk(const WebPMux* const mux, CHUNK_INDEX idx, + WebPFeatureFlags feature, + WebPFeatureFlags vp8x_flags, + int max, int* num) { + const WebPMuxError err = + WebPMuxNumChunks(mux, kChunks[idx].id, num); + if (err != WEBP_MUX_OK) return err; + if (max > -1 && *num > max) return WEBP_MUX_INVALID_ARGUMENT; + if (feature != NO_FLAG && IsNotCompatible(vp8x_flags & feature, *num)) { + return WEBP_MUX_INVALID_ARGUMENT; + } + return WEBP_MUX_OK; +} + +WebPMuxError MuxValidate(const WebPMux* const mux) { + int num_iccp; + int num_meta; + int num_loop_chunks; + int num_frames; + int num_tiles; + int num_vp8x; + int num_images; + int num_alpha; + uint32_t flags; + WebPMuxError err; + + // Verify mux is not NULL. + if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; + + // Verify mux has at least one image. + if (mux->images_ == NULL) return WEBP_MUX_INVALID_ARGUMENT; + + err = WebPMuxGetFeatures(mux, &flags); + if (err != WEBP_MUX_OK) return err; + + // At most one color profile chunk. + err = ValidateChunk(mux, IDX_ICCP, ICCP_FLAG, flags, 1, &num_iccp); + if (err != WEBP_MUX_OK) return err; + + // At most one XMP metadata. + err = ValidateChunk(mux, IDX_META, META_FLAG, flags, 1, &num_meta); + if (err != WEBP_MUX_OK) return err; + + // Animation: ANIMATION_FLAG, loop chunk and frame chunk(s) are consistent. + // At most one loop chunk. + err = ValidateChunk(mux, IDX_LOOP, NO_FLAG, flags, 1, &num_loop_chunks); + if (err != WEBP_MUX_OK) return err; + err = ValidateChunk(mux, IDX_FRAME, NO_FLAG, flags, -1, &num_frames); + if (err != WEBP_MUX_OK) return err; + + { + const int has_animation = !!(flags & ANIMATION_FLAG); + if (has_animation && (num_loop_chunks == 0 || num_frames == 0)) { + return WEBP_MUX_INVALID_ARGUMENT; + } + if (!has_animation && (num_loop_chunks == 1 || num_frames > 0)) { + return WEBP_MUX_INVALID_ARGUMENT; + } + } + + // Tiling: TILE_FLAG and tile chunk(s) are consistent. + err = ValidateChunk(mux, IDX_TILE, TILE_FLAG, flags, -1, &num_tiles); + if (err != WEBP_MUX_OK) return err; + + // Verify either VP8X chunk is present OR there is only one elem in + // mux->images_. + err = ValidateChunk(mux, IDX_VP8X, NO_FLAG, flags, 1, &num_vp8x); + if (err != WEBP_MUX_OK) return err; + err = ValidateChunk(mux, IDX_VP8, NO_FLAG, flags, -1, &num_images); + if (err != WEBP_MUX_OK) return err; + if (num_vp8x == 0 && num_images != 1) return WEBP_MUX_INVALID_ARGUMENT; + + // ALPHA_FLAG & alpha chunk(s) are consistent. + if (num_vp8x > 0 && MuxHasLosslessImages(mux->images_)) { + // Special case: we have a VP8X chunk as well as some lossless images. + if (!(flags & ALPHA_FLAG)) return WEBP_MUX_INVALID_ARGUMENT; + } else { + err = ValidateChunk(mux, IDX_ALPHA, ALPHA_FLAG, flags, -1, &num_alpha); + if (err != WEBP_MUX_OK) return err; + } + + // num_tiles & num_images are consistent. + if (num_tiles > 0 && num_images != num_tiles) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + return WEBP_MUX_OK; +} + +#undef NO_FLAG + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/mux/muxread.c b/drivers/webpold/mux/muxread.c new file mode 100644 index 0000000000..21c3cfbaeb --- /dev/null +++ b/drivers/webpold/mux/muxread.c @@ -0,0 +1,411 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Read APIs for mux. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +#include <assert.h> +#include "./muxi.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Helper method(s). + +// Handy MACRO. +#define SWITCH_ID_LIST(INDEX, LIST) \ + if (idx == (INDEX)) { \ + const WebPChunk* const chunk = ChunkSearchList((LIST), nth, \ + kChunks[(INDEX)].tag); \ + if (chunk) { \ + *data = chunk->data_; \ + return WEBP_MUX_OK; \ + } else { \ + return WEBP_MUX_NOT_FOUND; \ + } \ + } + +static WebPMuxError MuxGet(const WebPMux* const mux, CHUNK_INDEX idx, + uint32_t nth, WebPData* const data) { + assert(mux != NULL); + assert(!IsWPI(kChunks[idx].id)); + WebPDataInit(data); + + SWITCH_ID_LIST(IDX_VP8X, mux->vp8x_); + SWITCH_ID_LIST(IDX_ICCP, mux->iccp_); + SWITCH_ID_LIST(IDX_LOOP, mux->loop_); + SWITCH_ID_LIST(IDX_META, mux->meta_); + SWITCH_ID_LIST(IDX_UNKNOWN, mux->unknown_); + return WEBP_MUX_NOT_FOUND; +} +#undef SWITCH_ID_LIST + +// Fill the chunk with the given data (includes chunk header bytes), after some +// verifications. +static WebPMuxError ChunkVerifyAndAssignData(WebPChunk* chunk, + const uint8_t* data, + size_t data_size, size_t riff_size, + int copy_data) { + uint32_t chunk_size; + WebPData chunk_data; + + // Sanity checks. + if (data_size < TAG_SIZE) return WEBP_MUX_NOT_ENOUGH_DATA; + chunk_size = GetLE32(data + TAG_SIZE); + + { + const size_t chunk_disk_size = SizeWithPadding(chunk_size); + if (chunk_disk_size > riff_size) return WEBP_MUX_BAD_DATA; + if (chunk_disk_size > data_size) return WEBP_MUX_NOT_ENOUGH_DATA; + } + + // Data assignment. + chunk_data.bytes_ = data + CHUNK_HEADER_SIZE; + chunk_data.size_ = chunk_size; + return ChunkAssignData(chunk, &chunk_data, copy_data, GetLE32(data + 0)); +} + +//------------------------------------------------------------------------------ +// Create a mux object from WebP-RIFF data. + +WebPMux* WebPMuxCreateInternal(const WebPData* bitstream, int copy_data, + int version) { + size_t riff_size; + uint32_t tag; + const uint8_t* end; + WebPMux* mux = NULL; + WebPMuxImage* wpi = NULL; + const uint8_t* data; + size_t size; + WebPChunk chunk; + ChunkInit(&chunk); + + // Sanity checks. + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_MUX_ABI_VERSION)) { + return NULL; // version mismatch + } + if (bitstream == NULL) return NULL; + + data = bitstream->bytes_; + size = bitstream->size_; + + if (data == NULL) return NULL; + if (size < RIFF_HEADER_SIZE) return NULL; + if (GetLE32(data + 0) != MKFOURCC('R', 'I', 'F', 'F') || + GetLE32(data + CHUNK_HEADER_SIZE) != MKFOURCC('W', 'E', 'B', 'P')) { + return NULL; + } + + mux = WebPMuxNew(); + if (mux == NULL) return NULL; + + if (size < RIFF_HEADER_SIZE + TAG_SIZE) goto Err; + + tag = GetLE32(data + RIFF_HEADER_SIZE); + if (tag != kChunks[IDX_VP8].tag && + tag != kChunks[IDX_VP8L].tag && + tag != kChunks[IDX_VP8X].tag) { + goto Err; // First chunk should be VP8, VP8L or VP8X. + } + + riff_size = SizeWithPadding(GetLE32(data + TAG_SIZE)); + if (riff_size > MAX_CHUNK_PAYLOAD || riff_size > size) { + goto Err; + } else { + if (riff_size < size) { // Redundant data after last chunk. + size = riff_size; // To make sure we don't read any data beyond mux_size. + } + } + + end = data + size; + data += RIFF_HEADER_SIZE; + size -= RIFF_HEADER_SIZE; + + wpi = (WebPMuxImage*)malloc(sizeof(*wpi)); + if (wpi == NULL) goto Err; + MuxImageInit(wpi); + + // Loop over chunks. + while (data != end) { + WebPChunkId id; + WebPMuxError err; + + err = ChunkVerifyAndAssignData(&chunk, data, size, riff_size, copy_data); + if (err != WEBP_MUX_OK) goto Err; + + id = ChunkGetIdFromTag(chunk.tag_); + + if (IsWPI(id)) { // An image chunk (frame/tile/alpha/vp8). + WebPChunk** wpi_chunk_ptr = + MuxImageGetListFromId(wpi, id); // Image chunk to set. + assert(wpi_chunk_ptr != NULL); + if (*wpi_chunk_ptr != NULL) goto Err; // Consecutive alpha chunks or + // consecutive frame/tile chunks. + if (ChunkSetNth(&chunk, wpi_chunk_ptr, 1) != WEBP_MUX_OK) goto Err; + if (id == WEBP_CHUNK_IMAGE) { + wpi->is_partial_ = 0; // wpi is completely filled. + // Add this to mux->images_ list. + if (MuxImagePush(wpi, &mux->images_) != WEBP_MUX_OK) goto Err; + MuxImageInit(wpi); // Reset for reading next image. + } else { + wpi->is_partial_ = 1; // wpi is only partially filled. + } + } else { // A non-image chunk. + WebPChunk** chunk_list; + if (wpi->is_partial_) goto Err; // Encountered a non-image chunk before + // getting all chunks of an image. + chunk_list = MuxGetChunkListFromId(mux, id); // List to add this chunk. + if (chunk_list == NULL) chunk_list = &mux->unknown_; + if (ChunkSetNth(&chunk, chunk_list, 0) != WEBP_MUX_OK) goto Err; + } + { + const size_t data_size = ChunkDiskSize(&chunk); + data += data_size; + size -= data_size; + } + ChunkInit(&chunk); + } + + // Validate mux if complete. + if (MuxValidate(mux) != WEBP_MUX_OK) goto Err; + + MuxImageDelete(wpi); + return mux; // All OK; + + Err: // Something bad happened. + ChunkRelease(&chunk); + MuxImageDelete(wpi); + WebPMuxDelete(mux); + return NULL; +} + +//------------------------------------------------------------------------------ +// Get API(s). + +WebPMuxError WebPMuxGetFeatures(const WebPMux* mux, uint32_t* flags) { + WebPData data; + WebPMuxError err; + + if (mux == NULL || flags == NULL) return WEBP_MUX_INVALID_ARGUMENT; + *flags = 0; + + // Check if VP8X chunk is present. + err = MuxGet(mux, IDX_VP8X, 1, &data); + if (err == WEBP_MUX_NOT_FOUND) { + // Check if VP8/VP8L chunk is present. + err = WebPMuxGetImage(mux, &data); + WebPDataClear(&data); + return err; + } else if (err != WEBP_MUX_OK) { + return err; + } + + if (data.size_ < CHUNK_SIZE_BYTES) return WEBP_MUX_BAD_DATA; + + // All OK. Fill up flags. + *flags = GetLE32(data.bytes_); + return WEBP_MUX_OK; +} + +static uint8_t* EmitVP8XChunk(uint8_t* const dst, int width, + int height, uint32_t flags) { + const size_t vp8x_size = CHUNK_HEADER_SIZE + VP8X_CHUNK_SIZE; + assert(width >= 1 && height >= 1); + assert(width <= MAX_CANVAS_SIZE && height <= MAX_CANVAS_SIZE); + assert(width * (uint64_t)height < MAX_IMAGE_AREA); + PutLE32(dst, MKFOURCC('V', 'P', '8', 'X')); + PutLE32(dst + TAG_SIZE, VP8X_CHUNK_SIZE); + PutLE32(dst + CHUNK_HEADER_SIZE, flags); + PutLE24(dst + CHUNK_HEADER_SIZE + 4, width - 1); + PutLE24(dst + CHUNK_HEADER_SIZE + 7, height - 1); + return dst + vp8x_size; +} + +// Assemble a single image WebP bitstream from 'wpi'. +static WebPMuxError SynthesizeBitstream(WebPMuxImage* const wpi, + WebPData* const bitstream) { + uint8_t* dst; + + // Allocate data. + const int need_vp8x = (wpi->alpha_ != NULL); + const size_t vp8x_size = need_vp8x ? CHUNK_HEADER_SIZE + VP8X_CHUNK_SIZE : 0; + const size_t alpha_size = need_vp8x ? ChunkDiskSize(wpi->alpha_) : 0; + // Note: No need to output FRM/TILE chunk for a single image. + const size_t size = RIFF_HEADER_SIZE + vp8x_size + alpha_size + + ChunkDiskSize(wpi->img_); + uint8_t* const data = (uint8_t*)malloc(size); + if (data == NULL) return WEBP_MUX_MEMORY_ERROR; + + // Main RIFF header. + dst = MuxEmitRiffHeader(data, size); + + if (need_vp8x) { + int w, h; + WebPMuxError err; + assert(wpi->img_ != NULL); + err = MuxGetImageWidthHeight(wpi->img_, &w, &h); + if (err != WEBP_MUX_OK) { + free(data); + return err; + } + dst = EmitVP8XChunk(dst, w, h, ALPHA_FLAG); // VP8X. + dst = ChunkListEmit(wpi->alpha_, dst); // ALPH. + } + + // Bitstream. + dst = ChunkListEmit(wpi->img_, dst); + assert(dst == data + size); + + // Output. + bitstream->bytes_ = data; + bitstream->size_ = size; + return WEBP_MUX_OK; +} + +WebPMuxError WebPMuxGetImage(const WebPMux* mux, WebPData* bitstream) { + WebPMuxError err; + WebPMuxImage* wpi = NULL; + + if (mux == NULL || bitstream == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + err = MuxValidateForImage(mux); + if (err != WEBP_MUX_OK) return err; + + // All well. Get the image. + err = MuxImageGetNth((const WebPMuxImage**)&mux->images_, 1, WEBP_CHUNK_IMAGE, + &wpi); + assert(err == WEBP_MUX_OK); // Already tested above. + + return SynthesizeBitstream(wpi, bitstream); +} + +WebPMuxError WebPMuxGetMetadata(const WebPMux* mux, WebPData* metadata) { + if (mux == NULL || metadata == NULL) return WEBP_MUX_INVALID_ARGUMENT; + return MuxGet(mux, IDX_META, 1, metadata); +} + +WebPMuxError WebPMuxGetColorProfile(const WebPMux* mux, + WebPData* color_profile) { + if (mux == NULL || color_profile == NULL) return WEBP_MUX_INVALID_ARGUMENT; + return MuxGet(mux, IDX_ICCP, 1, color_profile); +} + +WebPMuxError WebPMuxGetLoopCount(const WebPMux* mux, int* loop_count) { + WebPData image; + WebPMuxError err; + + if (mux == NULL || loop_count == NULL) return WEBP_MUX_INVALID_ARGUMENT; + + err = MuxGet(mux, IDX_LOOP, 1, &image); + if (err != WEBP_MUX_OK) return err; + if (image.size_ < kChunks[WEBP_CHUNK_LOOP].size) return WEBP_MUX_BAD_DATA; + *loop_count = GetLE16(image.bytes_); + + return WEBP_MUX_OK; +} + +static WebPMuxError MuxGetFrameTileInternal( + const WebPMux* const mux, uint32_t nth, WebPData* const bitstream, + int* const x_offset, int* const y_offset, int* const duration, + uint32_t tag) { + const WebPData* frame_tile_data; + WebPMuxError err; + WebPMuxImage* wpi; + + const int is_frame = (tag == kChunks[WEBP_CHUNK_FRAME].tag) ? 1 : 0; + const CHUNK_INDEX idx = is_frame ? IDX_FRAME : IDX_TILE; + const WebPChunkId id = kChunks[idx].id; + + if (mux == NULL || bitstream == NULL || + x_offset == NULL || y_offset == NULL || (is_frame && duration == NULL)) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // Get the nth WebPMuxImage. + err = MuxImageGetNth((const WebPMuxImage**)&mux->images_, nth, id, &wpi); + if (err != WEBP_MUX_OK) return err; + + // Get frame chunk. + assert(wpi->header_ != NULL); // As MuxImageGetNth() already checked header_. + frame_tile_data = &wpi->header_->data_; + + if (frame_tile_data->size_ < kChunks[idx].size) return WEBP_MUX_BAD_DATA; + *x_offset = 2 * GetLE24(frame_tile_data->bytes_ + 0); + *y_offset = 2 * GetLE24(frame_tile_data->bytes_ + 3); + if (is_frame) *duration = 1 + GetLE24(frame_tile_data->bytes_ + 12); + + return SynthesizeBitstream(wpi, bitstream); +} + +WebPMuxError WebPMuxGetFrame(const WebPMux* mux, uint32_t nth, + WebPData* bitstream, + int* x_offset, int* y_offset, int* duration) { + return MuxGetFrameTileInternal(mux, nth, bitstream, x_offset, y_offset, + duration, kChunks[IDX_FRAME].tag); +} + +WebPMuxError WebPMuxGetTile(const WebPMux* mux, uint32_t nth, + WebPData* bitstream, + int* x_offset, int* y_offset) { + return MuxGetFrameTileInternal(mux, nth, bitstream, x_offset, y_offset, NULL, + kChunks[IDX_TILE].tag); +} + +// Get chunk index from chunk id. Returns IDX_NIL if not found. +static CHUNK_INDEX ChunkGetIndexFromId(WebPChunkId id) { + int i; + for (i = 0; kChunks[i].id != WEBP_CHUNK_NIL; ++i) { + if (id == kChunks[i].id) return i; + } + return IDX_NIL; +} + +// Count number of chunks matching 'tag' in the 'chunk_list'. +// If tag == NIL_TAG, any tag will be matched. +static int CountChunks(const WebPChunk* const chunk_list, uint32_t tag) { + int count = 0; + const WebPChunk* current; + for (current = chunk_list; current != NULL; current = current->next_) { + if (tag == NIL_TAG || current->tag_ == tag) { + count++; // Count chunks whose tags match. + } + } + return count; +} + +WebPMuxError WebPMuxNumChunks(const WebPMux* mux, + WebPChunkId id, int* num_elements) { + if (mux == NULL || num_elements == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + if (IsWPI(id)) { + *num_elements = MuxImageCount(mux->images_, id); + } else { + WebPChunk* const* chunk_list = MuxGetChunkListFromId(mux, id); + if (chunk_list == NULL) { + *num_elements = 0; + } else { + const CHUNK_INDEX idx = ChunkGetIndexFromId(id); + *num_elements = CountChunks(*chunk_list, kChunks[idx].tag); + } + } + + return WEBP_MUX_OK; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/types.h b/drivers/webpold/types.h new file mode 100644 index 0000000000..3e27190bef --- /dev/null +++ b/drivers/webpold/types.h @@ -0,0 +1,45 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Common types +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_WEBP_TYPES_H_ +#define WEBP_WEBP_TYPES_H_ + +#include <stddef.h> // for size_t + +#ifndef _MSC_VER +#include <inttypes.h> +#ifdef __STRICT_ANSI__ +#define WEBP_INLINE +#else /* __STRICT_ANSI__ */ +#define WEBP_INLINE inline +#endif +#else +typedef signed char int8_t; +typedef unsigned char uint8_t; +typedef signed short int16_t; +typedef unsigned short uint16_t; +typedef signed int int32_t; +typedef unsigned int uint32_t; +typedef unsigned long long int uint64_t; +typedef long long int int64_t; +#define WEBP_INLINE __forceinline +#endif /* _MSC_VER */ + +#ifndef WEBP_EXTERN +// This explicitly marks library functions and allows for changing the +// signature for e.g., Windows DLL builds. +#define WEBP_EXTERN(type) extern type +#endif /* WEBP_EXTERN */ + +// Macro to check ABI compatibility (same major revision number) +#define WEBP_ABI_IS_INCOMPATIBLE(a, b) (((a) >> 8) != ((b) >> 8)) + +#endif /* WEBP_WEBP_TYPES_H_ */ diff --git a/drivers/webpold/utils/bit_reader.c b/drivers/webpold/utils/bit_reader.c new file mode 100644 index 0000000000..1afb1db890 --- /dev/null +++ b/drivers/webpold/utils/bit_reader.c @@ -0,0 +1,229 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Boolean decoder +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./bit_reader.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define MK(X) (((bit_t)(X) << (BITS)) | (MASK)) + +//------------------------------------------------------------------------------ +// VP8BitReader + +void VP8InitBitReader(VP8BitReader* const br, + const uint8_t* const start, const uint8_t* const end) { + assert(br != NULL); + assert(start != NULL); + assert(start <= end); + br->range_ = MK(255 - 1); + br->buf_ = start; + br->buf_end_ = end; + br->value_ = 0; + br->missing_ = 8; // to load the very first 8bits + br->eof_ = 0; +} + +const uint8_t kVP8Log2Range[128] = { + 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 0 +}; + +// range = (range << kVP8Log2Range[range]) + trailing 1's +const bit_t kVP8NewRange[128] = { + MK(127), MK(127), MK(191), MK(127), MK(159), MK(191), MK(223), MK(127), + MK(143), MK(159), MK(175), MK(191), MK(207), MK(223), MK(239), MK(127), + MK(135), MK(143), MK(151), MK(159), MK(167), MK(175), MK(183), MK(191), + MK(199), MK(207), MK(215), MK(223), MK(231), MK(239), MK(247), MK(127), + MK(131), MK(135), MK(139), MK(143), MK(147), MK(151), MK(155), MK(159), + MK(163), MK(167), MK(171), MK(175), MK(179), MK(183), MK(187), MK(191), + MK(195), MK(199), MK(203), MK(207), MK(211), MK(215), MK(219), MK(223), + MK(227), MK(231), MK(235), MK(239), MK(243), MK(247), MK(251), MK(127), + MK(129), MK(131), MK(133), MK(135), MK(137), MK(139), MK(141), MK(143), + MK(145), MK(147), MK(149), MK(151), MK(153), MK(155), MK(157), MK(159), + MK(161), MK(163), MK(165), MK(167), MK(169), MK(171), MK(173), MK(175), + MK(177), MK(179), MK(181), MK(183), MK(185), MK(187), MK(189), MK(191), + MK(193), MK(195), MK(197), MK(199), MK(201), MK(203), MK(205), MK(207), + MK(209), MK(211), MK(213), MK(215), MK(217), MK(219), MK(221), MK(223), + MK(225), MK(227), MK(229), MK(231), MK(233), MK(235), MK(237), MK(239), + MK(241), MK(243), MK(245), MK(247), MK(249), MK(251), MK(253), MK(127) +}; + +#undef MK + +void VP8LoadFinalBytes(VP8BitReader* const br) { + assert(br != NULL && br->buf_ != NULL); + // Only read 8bits at a time + if (br->buf_ < br->buf_end_) { + br->value_ |= (bit_t)(*br->buf_++) << ((BITS) - 8 + br->missing_); + br->missing_ -= 8; + } else { + br->eof_ = 1; + } +} + +//------------------------------------------------------------------------------ +// Higher-level calls + +uint32_t VP8GetValue(VP8BitReader* const br, int bits) { + uint32_t v = 0; + while (bits-- > 0) { + v |= VP8GetBit(br, 0x80) << bits; + } + return v; +} + +int32_t VP8GetSignedValue(VP8BitReader* const br, int bits) { + const int value = VP8GetValue(br, bits); + return VP8Get(br) ? -value : value; +} + +//------------------------------------------------------------------------------ +// VP8LBitReader + +#define MAX_NUM_BIT_READ 25 + +static const uint32_t kBitMask[MAX_NUM_BIT_READ] = { + 0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, + 65535, 131071, 262143, 524287, 1048575, 2097151, 4194303, 8388607, 16777215 +}; + +void VP8LInitBitReader(VP8LBitReader* const br, + const uint8_t* const start, + size_t length) { + size_t i; + assert(br != NULL); + assert(start != NULL); + assert(length < 0xfffffff8u); // can't happen with a RIFF chunk. + + br->buf_ = start; + br->len_ = length; + br->val_ = 0; + br->pos_ = 0; + br->bit_pos_ = 0; + br->eos_ = 0; + br->error_ = 0; + for (i = 0; i < sizeof(br->val_) && i < br->len_; ++i) { + br->val_ |= ((uint64_t)br->buf_[br->pos_]) << (8 * i); + ++br->pos_; + } +} + +void VP8LBitReaderSetBuffer(VP8LBitReader* const br, + const uint8_t* const buf, size_t len) { + assert(br != NULL); + assert(buf != NULL); + assert(len < 0xfffffff8u); // can't happen with a RIFF chunk. + br->eos_ = (br->pos_ >= len); + br->buf_ = buf; + br->len_ = len; +} + +static void ShiftBytes(VP8LBitReader* const br) { + while (br->bit_pos_ >= 8 && br->pos_ < br->len_) { + br->val_ >>= 8; + br->val_ |= ((uint64_t)br->buf_[br->pos_]) << 56; + ++br->pos_; + br->bit_pos_ -= 8; + } +} + +void VP8LFillBitWindow(VP8LBitReader* const br) { + if (br->bit_pos_ >= 32) { +#if defined(__x86_64__) || defined(_M_X64) + if (br->pos_ + 8 < br->len_) { + br->val_ >>= 32; + // The expression below needs a little-endian arch to work correctly. + // This gives a large speedup for decoding speed. + br->val_ |= *(const uint64_t *)(br->buf_ + br->pos_) << 32; + br->pos_ += 4; + br->bit_pos_ -= 32; + } else { + // Slow path. + ShiftBytes(br); + } +#else + // Always the slow path. + ShiftBytes(br); +#endif + } + if (br->pos_ == br->len_ && br->bit_pos_ == 64) { + br->eos_ = 1; + } +} + +uint32_t VP8LReadOneBit(VP8LBitReader* const br) { + const uint32_t val = (br->val_ >> br->bit_pos_) & 1; + // Flag an error at end_of_stream. + if (!br->eos_) { + ++br->bit_pos_; + if (br->bit_pos_ >= 32) { + ShiftBytes(br); + } + // After this last bit is read, check if eos needs to be flagged. + if (br->pos_ == br->len_ && br->bit_pos_ == 64) { + br->eos_ = 1; + } + } else { + br->error_ = 1; + } + return val; +} + +uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits) { + uint32_t val = 0; + assert(n_bits >= 0); + // Flag an error if end_of_stream or n_bits is more than allowed limit. + if (!br->eos_ && n_bits < MAX_NUM_BIT_READ) { + // If this read is going to cross the read buffer, set the eos flag. + if (br->pos_ == br->len_) { + if ((br->bit_pos_ + n_bits) >= 64) { + br->eos_ = 1; + if ((br->bit_pos_ + n_bits) > 64) return val; + } + } + val = (br->val_ >> br->bit_pos_) & kBitMask[n_bits]; + br->bit_pos_ += n_bits; + if (br->bit_pos_ >= 40) { + if (br->pos_ + 5 < br->len_) { + br->val_ >>= 40; + br->val_ |= + (((uint64_t)br->buf_[br->pos_ + 0]) << 24) | + (((uint64_t)br->buf_[br->pos_ + 1]) << 32) | + (((uint64_t)br->buf_[br->pos_ + 2]) << 40) | + (((uint64_t)br->buf_[br->pos_ + 3]) << 48) | + (((uint64_t)br->buf_[br->pos_ + 4]) << 56); + br->pos_ += 5; + br->bit_pos_ -= 40; + } + if (br->bit_pos_ >= 8) { + ShiftBytes(br); + } + } + } else { + br->error_ = 1; + } + return val; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/utils/bit_reader.h b/drivers/webpold/utils/bit_reader.h new file mode 100644 index 0000000000..43cd948fd4 --- /dev/null +++ b/drivers/webpold/utils/bit_reader.h @@ -0,0 +1,198 @@ +// +// Copyright 2010 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Boolean decoder +// +// Author: Skal (pascal.massimino@gmail.com) +// Vikas Arora (vikaas.arora@gmail.com) + +#ifndef WEBP_UTILS_BIT_READER_H_ +#define WEBP_UTILS_BIT_READER_H_ + +#include <assert.h> +#ifdef _MSC_VER +#include <stdlib.h> // _byteswap_ulong +#endif +#include <string.h> // For memcpy +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define BITS 32 // can be 32, 16 or 8 +#define MASK ((((bit_t)1) << (BITS)) - 1) +#if (BITS == 32) +typedef uint64_t bit_t; // natural register type +typedef uint32_t lbit_t; // natural type for memory I/O +#elif (BITS == 16) +typedef uint32_t bit_t; +typedef uint16_t lbit_t; +#else +typedef uint32_t bit_t; +typedef uint8_t lbit_t; +#endif + +//------------------------------------------------------------------------------ +// Bitreader and code-tree reader + +typedef struct VP8BitReader VP8BitReader; +struct VP8BitReader { + const uint8_t* buf_; // next byte to be read + const uint8_t* buf_end_; // end of read buffer + int eof_; // true if input is exhausted + + // boolean decoder + bit_t range_; // current range minus 1. In [127, 254] interval. + bit_t value_; // current value + int missing_; // number of missing bits in value_ (8bit) +}; + +// Initialize the bit reader and the boolean decoder. +void VP8InitBitReader(VP8BitReader* const br, + const uint8_t* const start, const uint8_t* const end); + +// return the next value made of 'num_bits' bits +uint32_t VP8GetValue(VP8BitReader* const br, int num_bits); +static WEBP_INLINE uint32_t VP8Get(VP8BitReader* const br) { + return VP8GetValue(br, 1); +} + +// return the next value with sign-extension. +int32_t VP8GetSignedValue(VP8BitReader* const br, int num_bits); + +// Read a bit with proba 'prob'. Speed-critical function! +extern const uint8_t kVP8Log2Range[128]; +extern const bit_t kVP8NewRange[128]; + +void VP8LoadFinalBytes(VP8BitReader* const br); // special case for the tail + +static WEBP_INLINE void VP8LoadNewBytes(VP8BitReader* const br) { + assert(br && br->buf_); + // Read 'BITS' bits at a time if possible. + if (br->buf_ + sizeof(lbit_t) <= br->buf_end_) { + // convert memory type to register type (with some zero'ing!) + bit_t bits; + lbit_t in_bits = *(lbit_t*)br->buf_; + br->buf_ += (BITS) >> 3; +#if !defined(__BIG_ENDIAN__) +#if (BITS == 32) +#if defined(__i386__) || defined(__x86_64__) + __asm__ volatile("bswap %k0" : "=r"(in_bits) : "0"(in_bits)); + bits = (bit_t)in_bits; // 32b -> 64b zero-extension +#elif defined(_MSC_VER) + bits = _byteswap_ulong(in_bits); +#else + bits = (bit_t)(in_bits >> 24) | ((in_bits >> 8) & 0xff00) + | ((in_bits << 8) & 0xff0000) | (in_bits << 24); +#endif // x86 +#elif (BITS == 16) + // gcc will recognize a 'rorw $8, ...' here: + bits = (bit_t)(in_bits >> 8) | ((in_bits & 0xff) << 8); +#endif +#else // LITTLE_ENDIAN + bits = (bit_t)in_bits; +#endif + br->value_ |= bits << br->missing_; + br->missing_ -= (BITS); + } else { + VP8LoadFinalBytes(br); // no need to be inlined + } +} + +static WEBP_INLINE int VP8BitUpdate(VP8BitReader* const br, bit_t split) { + const bit_t value_split = split | (MASK); + if (br->missing_ > 0) { // Make sure we have a least BITS bits in 'value_' + VP8LoadNewBytes(br); + } + if (br->value_ > value_split) { + br->range_ -= value_split + 1; + br->value_ -= value_split + 1; + return 1; + } else { + br->range_ = value_split; + return 0; + } +} + +static WEBP_INLINE void VP8Shift(VP8BitReader* const br) { + // range_ is in [0..127] interval here. + const int idx = br->range_ >> (BITS); + const int shift = kVP8Log2Range[idx]; + br->range_ = kVP8NewRange[idx]; + br->value_ <<= shift; + br->missing_ += shift; +} + +static WEBP_INLINE int VP8GetBit(VP8BitReader* const br, int prob) { + // It's important to avoid generating a 64bit x 64bit multiply here. + // We just need an 8b x 8b after all. + const bit_t split = + (bit_t)((uint32_t)(br->range_ >> (BITS)) * prob) << ((BITS) - 8); + const int bit = VP8BitUpdate(br, split); + if (br->range_ <= (((bit_t)0x7e << (BITS)) | (MASK))) { + VP8Shift(br); + } + return bit; +} + +static WEBP_INLINE int VP8GetSigned(VP8BitReader* const br, int v) { + const bit_t split = (br->range_ >> 1); + const int bit = VP8BitUpdate(br, split); + VP8Shift(br); + return bit ? -v : v; +} + + +// ----------------------------------------------------------------------------- +// Bitreader + +typedef struct { + uint64_t val_; + const uint8_t* buf_; + size_t len_; + size_t pos_; + int bit_pos_; + int eos_; + int error_; +} VP8LBitReader; + +void VP8LInitBitReader(VP8LBitReader* const br, + const uint8_t* const start, + size_t length); + +// Sets a new data buffer. +void VP8LBitReaderSetBuffer(VP8LBitReader* const br, + const uint8_t* const buffer, size_t length); + +// Reads the specified number of bits from Read Buffer. +// Flags an error in case end_of_stream or n_bits is more than allowed limit. +// Flags eos if this read attempt is going to cross the read buffer. +uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits); + +// Reads one bit from Read Buffer. Flags an error in case end_of_stream. +// Flags eos after reading last bit from the buffer. +uint32_t VP8LReadOneBit(VP8LBitReader* const br); + +// VP8LReadOneBitUnsafe is faster than VP8LReadOneBit, but it can be called only +// 32 times after the last VP8LFillBitWindow. Any subsequent calls +// (without VP8LFillBitWindow) will return invalid data. +static WEBP_INLINE uint32_t VP8LReadOneBitUnsafe(VP8LBitReader* const br) { + const uint32_t val = (br->val_ >> br->bit_pos_) & 1; + ++br->bit_pos_; + return val; +} + +// Advances the Read buffer by 4 bytes to make room for reading next 32 bits. +void VP8LFillBitWindow(VP8LBitReader* const br); + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_UTILS_BIT_READER_H_ */ diff --git a/drivers/webpold/utils/bit_writer.c b/drivers/webpold/utils/bit_writer.c new file mode 100644 index 0000000000..671159cacd --- /dev/null +++ b/drivers/webpold/utils/bit_writer.c @@ -0,0 +1,284 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Bit writing and boolean coder +// +// Author: Skal (pascal.massimino@gmail.com) +// Vikas Arora (vikaas.arora@gmail.com) + +#include <assert.h> +#include <string.h> // for memcpy() +#include <stdlib.h> +#include "./bit_writer.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// VP8BitWriter + +static int BitWriterResize(VP8BitWriter* const bw, size_t extra_size) { + uint8_t* new_buf; + size_t new_size; + const uint64_t needed_size_64b = (uint64_t)bw->pos_ + extra_size; + const size_t needed_size = (size_t)needed_size_64b; + if (needed_size_64b != needed_size) { + bw->error_ = 1; + return 0; + } + if (needed_size <= bw->max_pos_) return 1; + // If the following line wraps over 32bit, the test just after will catch it. + new_size = 2 * bw->max_pos_; + if (new_size < needed_size) new_size = needed_size; + if (new_size < 1024) new_size = 1024; + new_buf = (uint8_t*)malloc(new_size); + if (new_buf == NULL) { + bw->error_ = 1; + return 0; + } + memcpy(new_buf, bw->buf_, bw->pos_); + free(bw->buf_); + bw->buf_ = new_buf; + bw->max_pos_ = new_size; + return 1; +} + +static void kFlush(VP8BitWriter* const bw) { + const int s = 8 + bw->nb_bits_; + const int32_t bits = bw->value_ >> s; + assert(bw->nb_bits_ >= 0); + bw->value_ -= bits << s; + bw->nb_bits_ -= 8; + if ((bits & 0xff) != 0xff) { + size_t pos = bw->pos_; + if (!BitWriterResize(bw, bw->run_ + 1)) { + return; + } + if (bits & 0x100) { // overflow -> propagate carry over pending 0xff's + if (pos > 0) bw->buf_[pos - 1]++; + } + if (bw->run_ > 0) { + const int value = (bits & 0x100) ? 0x00 : 0xff; + for (; bw->run_ > 0; --bw->run_) bw->buf_[pos++] = value; + } + bw->buf_[pos++] = bits; + bw->pos_ = pos; + } else { + bw->run_++; // delay writing of bytes 0xff, pending eventual carry. + } +} + +//------------------------------------------------------------------------------ +// renormalization + +static const uint8_t kNorm[128] = { // renorm_sizes[i] = 8 - log2(i) + 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 0 +}; + +// range = ((range + 1) << kVP8Log2Range[range]) - 1 +static const uint8_t kNewRange[128] = { + 127, 127, 191, 127, 159, 191, 223, 127, 143, 159, 175, 191, 207, 223, 239, + 127, 135, 143, 151, 159, 167, 175, 183, 191, 199, 207, 215, 223, 231, 239, + 247, 127, 131, 135, 139, 143, 147, 151, 155, 159, 163, 167, 171, 175, 179, + 183, 187, 191, 195, 199, 203, 207, 211, 215, 219, 223, 227, 231, 235, 239, + 243, 247, 251, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149, + 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, 175, 177, 179, + 181, 183, 185, 187, 189, 191, 193, 195, 197, 199, 201, 203, 205, 207, 209, + 211, 213, 215, 217, 219, 221, 223, 225, 227, 229, 231, 233, 235, 237, 239, + 241, 243, 245, 247, 249, 251, 253, 127 +}; + +int VP8PutBit(VP8BitWriter* const bw, int bit, int prob) { + const int split = (bw->range_ * prob) >> 8; + if (bit) { + bw->value_ += split + 1; + bw->range_ -= split + 1; + } else { + bw->range_ = split; + } + if (bw->range_ < 127) { // emit 'shift' bits out and renormalize + const int shift = kNorm[bw->range_]; + bw->range_ = kNewRange[bw->range_]; + bw->value_ <<= shift; + bw->nb_bits_ += shift; + if (bw->nb_bits_ > 0) kFlush(bw); + } + return bit; +} + +int VP8PutBitUniform(VP8BitWriter* const bw, int bit) { + const int split = bw->range_ >> 1; + if (bit) { + bw->value_ += split + 1; + bw->range_ -= split + 1; + } else { + bw->range_ = split; + } + if (bw->range_ < 127) { + bw->range_ = kNewRange[bw->range_]; + bw->value_ <<= 1; + bw->nb_bits_ += 1; + if (bw->nb_bits_ > 0) kFlush(bw); + } + return bit; +} + +void VP8PutValue(VP8BitWriter* const bw, int value, int nb_bits) { + int mask; + for (mask = 1 << (nb_bits - 1); mask; mask >>= 1) + VP8PutBitUniform(bw, value & mask); +} + +void VP8PutSignedValue(VP8BitWriter* const bw, int value, int nb_bits) { + if (!VP8PutBitUniform(bw, value != 0)) + return; + if (value < 0) { + VP8PutValue(bw, ((-value) << 1) | 1, nb_bits + 1); + } else { + VP8PutValue(bw, value << 1, nb_bits + 1); + } +} + +//------------------------------------------------------------------------------ + +int VP8BitWriterInit(VP8BitWriter* const bw, size_t expected_size) { + bw->range_ = 255 - 1; + bw->value_ = 0; + bw->run_ = 0; + bw->nb_bits_ = -8; + bw->pos_ = 0; + bw->max_pos_ = 0; + bw->error_ = 0; + bw->buf_ = NULL; + return (expected_size > 0) ? BitWriterResize(bw, expected_size) : 1; +} + +uint8_t* VP8BitWriterFinish(VP8BitWriter* const bw) { + VP8PutValue(bw, 0, 9 - bw->nb_bits_); + bw->nb_bits_ = 0; // pad with zeroes + kFlush(bw); + return bw->buf_; +} + +int VP8BitWriterAppend(VP8BitWriter* const bw, + const uint8_t* data, size_t size) { + assert(data); + if (bw->nb_bits_ != -8) return 0; // kFlush() must have been called + if (!BitWriterResize(bw, size)) return 0; + memcpy(bw->buf_ + bw->pos_, data, size); + bw->pos_ += size; + return 1; +} + +void VP8BitWriterWipeOut(VP8BitWriter* const bw) { + if (bw) { + free(bw->buf_); + memset(bw, 0, sizeof(*bw)); + } +} + +//------------------------------------------------------------------------------ +// VP8LBitWriter + +// Returns 1 on success. +static int VP8LBitWriterResize(VP8LBitWriter* const bw, size_t extra_size) { + uint8_t* allocated_buf; + size_t allocated_size; + const size_t current_size = VP8LBitWriterNumBytes(bw); + const uint64_t size_required_64b = (uint64_t)current_size + extra_size; + const size_t size_required = (size_t)size_required_64b; + if (size_required != size_required_64b) { + bw->error_ = 1; + return 0; + } + if (bw->max_bytes_ > 0 && size_required <= bw->max_bytes_) return 1; + allocated_size = (3 * bw->max_bytes_) >> 1; + if (allocated_size < size_required) allocated_size = size_required; + // make allocated size multiple of 1k + allocated_size = (((allocated_size >> 10) + 1) << 10); + allocated_buf = (uint8_t*)malloc(allocated_size); + if (allocated_buf == NULL) { + bw->error_ = 1; + return 0; + } + memcpy(allocated_buf, bw->buf_, current_size); + free(bw->buf_); + bw->buf_ = allocated_buf; + bw->max_bytes_ = allocated_size; + memset(allocated_buf + current_size, 0, allocated_size - current_size); + return 1; +} + +int VP8LBitWriterInit(VP8LBitWriter* const bw, size_t expected_size) { + memset(bw, 0, sizeof(*bw)); + return VP8LBitWriterResize(bw, expected_size); +} + +void VP8LBitWriterDestroy(VP8LBitWriter* const bw) { + if (bw != NULL) { + free(bw->buf_); + memset(bw, 0, sizeof(*bw)); + } +} + +void VP8LWriteBits(VP8LBitWriter* const bw, int n_bits, uint32_t bits) { + if (n_bits < 1) return; +#if !defined(__BIG_ENDIAN__) + // Technically, this branch of the code can write up to 25 bits at a time, + // but in prefix encoding, the maximum number of bits written is 18 at a time. + { + uint8_t* const p = &bw->buf_[bw->bit_pos_ >> 3]; + uint32_t v = *(const uint32_t*)p; + v |= bits << (bw->bit_pos_ & 7); + *(uint32_t*)p = v; + bw->bit_pos_ += n_bits; + } +#else // BIG_ENDIAN + { + uint8_t* p = &bw->buf_[bw->bit_pos_ >> 3]; + const int bits_reserved_in_first_byte = bw->bit_pos_ & 7; + const int bits_left_to_write = n_bits - 8 + bits_reserved_in_first_byte; + // implicit & 0xff is assumed for uint8_t arithmetics + *p++ |= bits << bits_reserved_in_first_byte; + bits >>= 8 - bits_reserved_in_first_byte; + if (bits_left_to_write >= 1) { + *p++ = bits; + bits >>= 8; + if (bits_left_to_write >= 9) { + *p++ = bits; + bits >>= 8; + } + } + assert(n_bits <= 25); + *p = bits; + bw->bit_pos_ += n_bits; + } +#endif + if ((bw->bit_pos_ >> 3) > (bw->max_bytes_ - 8)) { + const uint64_t extra_size = 32768ULL + bw->max_bytes_; + if (extra_size != (size_t)extra_size || + !VP8LBitWriterResize(bw, (size_t)extra_size)) { + bw->bit_pos_ = 0; + bw->error_ = 1; + } + } +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/utils/bit_writer.h b/drivers/webpold/utils/bit_writer.h new file mode 100644 index 0000000000..57f39b11b1 --- /dev/null +++ b/drivers/webpold/utils/bit_writer.h @@ -0,0 +1,123 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Bit writing and boolean coder +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_UTILS_BIT_WRITER_H_ +#define WEBP_UTILS_BIT_WRITER_H_ + +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Bit-writing + +typedef struct VP8BitWriter VP8BitWriter; +struct VP8BitWriter { + int32_t range_; // range-1 + int32_t value_; + int run_; // number of outstanding bits + int nb_bits_; // number of pending bits + uint8_t* buf_; // internal buffer. Re-allocated regularly. Not owned. + size_t pos_; + size_t max_pos_; + int error_; // true in case of error +}; + +// Initialize the object. Allocates some initial memory based on expected_size. +int VP8BitWriterInit(VP8BitWriter* const bw, size_t expected_size); +// Finalize the bitstream coding. Returns a pointer to the internal buffer. +uint8_t* VP8BitWriterFinish(VP8BitWriter* const bw); +// Release any pending memory and zeroes the object. Not a mandatory call. +// Only useful in case of error, when the internal buffer hasn't been grabbed! +void VP8BitWriterWipeOut(VP8BitWriter* const bw); + +int VP8PutBit(VP8BitWriter* const bw, int bit, int prob); +int VP8PutBitUniform(VP8BitWriter* const bw, int bit); +void VP8PutValue(VP8BitWriter* const bw, int value, int nb_bits); +void VP8PutSignedValue(VP8BitWriter* const bw, int value, int nb_bits); + +// Appends some bytes to the internal buffer. Data is copied. +int VP8BitWriterAppend(VP8BitWriter* const bw, + const uint8_t* data, size_t size); + +// return approximate write position (in bits) +static WEBP_INLINE uint64_t VP8BitWriterPos(const VP8BitWriter* const bw) { + return (uint64_t)(bw->pos_ + bw->run_) * 8 + 8 + bw->nb_bits_; +} + +// Returns a pointer to the internal buffer. +static WEBP_INLINE uint8_t* VP8BitWriterBuf(const VP8BitWriter* const bw) { + return bw->buf_; +} +// Returns the size of the internal buffer. +static WEBP_INLINE size_t VP8BitWriterSize(const VP8BitWriter* const bw) { + return bw->pos_; +} + +//------------------------------------------------------------------------------ +// VP8LBitWriter +// TODO(vikasa): VP8LBitWriter is copied as-is from lossless code. There's scope +// of re-using VP8BitWriter. Will evaluate once basic lossless encoder is +// implemented. + +typedef struct { + uint8_t* buf_; + size_t bit_pos_; + size_t max_bytes_; + + // After all bits are written, the caller must observe the state of + // error_. A value of 1 indicates that a memory allocation failure + // has happened during bit writing. A value of 0 indicates successful + // writing of bits. + int error_; +} VP8LBitWriter; + +static WEBP_INLINE size_t VP8LBitWriterNumBytes(VP8LBitWriter* const bw) { + return (bw->bit_pos_ + 7) >> 3; +} + +static WEBP_INLINE uint8_t* VP8LBitWriterFinish(VP8LBitWriter* const bw) { + return bw->buf_; +} + +// Returns 0 in case of memory allocation error. +int VP8LBitWriterInit(VP8LBitWriter* const bw, size_t expected_size); + +void VP8LBitWriterDestroy(VP8LBitWriter* const bw); + +// This function writes bits into bytes in increasing addresses, and within +// a byte least-significant-bit first. +// +// The function can write up to 16 bits in one go with WriteBits +// Example: let's assume that 3 bits (Rs below) have been written already: +// +// BYTE-0 BYTE+1 BYTE+2 +// +// 0000 0RRR 0000 0000 0000 0000 +// +// Now, we could write 5 or less bits in MSB by just sifting by 3 +// and OR'ing to BYTE-0. +// +// For n bits, we take the last 5 bytes, OR that with high bits in BYTE-0, +// and locate the rest in BYTE+1 and BYTE+2. +// +// VP8LBitWriter's error_ flag is set in case of memory allocation error. +void VP8LWriteBits(VP8LBitWriter* const bw, int n_bits, uint32_t bits); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_UTILS_BIT_WRITER_H_ */ diff --git a/drivers/webpold/utils/color_cache.c b/drivers/webpold/utils/color_cache.c new file mode 100644 index 0000000000..560f81db10 --- /dev/null +++ b/drivers/webpold/utils/color_cache.c @@ -0,0 +1,44 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Color Cache for WebP Lossless +// +// Author: Jyrki Alakuijala (jyrki@google.com) + +#include <assert.h> +#include <stdlib.h> +#include "./color_cache.h" +#include "../utils/utils.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// VP8LColorCache. + +int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) { + const int hash_size = 1 << hash_bits; + assert(cc != NULL); + assert(hash_bits > 0); + cc->colors_ = (uint32_t*)WebPSafeCalloc((uint64_t)hash_size, + sizeof(*cc->colors_)); + if (cc->colors_ == NULL) return 0; + cc->hash_shift_ = 32 - hash_bits; + return 1; +} + +void VP8LColorCacheClear(VP8LColorCache* const cc) { + if (cc != NULL) { + free(cc->colors_); + cc->colors_ = NULL; + } +} + +#if defined(__cplusplus) || defined(c_plusplus) +} +#endif diff --git a/drivers/webpold/utils/color_cache.h b/drivers/webpold/utils/color_cache.h new file mode 100644 index 0000000000..da5e260195 --- /dev/null +++ b/drivers/webpold/utils/color_cache.h @@ -0,0 +1,68 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Color Cache for WebP Lossless +// +// Authors: Jyrki Alakuijala (jyrki@google.com) +// Urvang Joshi (urvang@google.com) + +#ifndef WEBP_UTILS_COLOR_CACHE_H_ +#define WEBP_UTILS_COLOR_CACHE_H_ + +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// Main color cache struct. +typedef struct { + uint32_t *colors_; // color entries + int hash_shift_; // Hash shift: 32 - hash_bits. +} VP8LColorCache; + +static const uint32_t kHashMul = 0x1e35a7bd; + +static WEBP_INLINE uint32_t VP8LColorCacheLookup( + const VP8LColorCache* const cc, uint32_t key) { + assert(key <= (~0U >> cc->hash_shift_)); + return cc->colors_[key]; +} + +static WEBP_INLINE void VP8LColorCacheInsert(const VP8LColorCache* const cc, + uint32_t argb) { + const uint32_t key = (kHashMul * argb) >> cc->hash_shift_; + cc->colors_[key] = argb; +} + +static WEBP_INLINE int VP8LColorCacheGetIndex(const VP8LColorCache* const cc, + uint32_t argb) { + return (kHashMul * argb) >> cc->hash_shift_; +} + +static WEBP_INLINE int VP8LColorCacheContains(const VP8LColorCache* const cc, + uint32_t argb) { + const uint32_t key = (kHashMul * argb) >> cc->hash_shift_; + return cc->colors_[key] == argb; +} + +//------------------------------------------------------------------------------ + +// Initializes the color cache with 'hash_bits' bits for the keys. +// Returns false in case of memory error. +int VP8LColorCacheInit(VP8LColorCache* const color_cache, int hash_bits); + +// Delete the memory associated to color cache. +void VP8LColorCacheClear(VP8LColorCache* const color_cache); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} +#endif + +#endif // WEBP_UTILS_COLOR_CACHE_H_ diff --git a/drivers/webpold/utils/filters.c b/drivers/webpold/utils/filters.c new file mode 100644 index 0000000000..08f52a3d20 --- /dev/null +++ b/drivers/webpold/utils/filters.c @@ -0,0 +1,229 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Spatial prediction using various filters +// +// Author: Urvang (urvang@google.com) + +#include "./filters.h" +#include <assert.h> +#include <stdlib.h> +#include <string.h> + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Helpful macro. + +# define SANITY_CHECK(in, out) \ + assert(in != NULL); \ + assert(out != NULL); \ + assert(width > 0); \ + assert(height > 0); \ + assert(bpp > 0); \ + assert(stride >= width * bpp); + +static WEBP_INLINE void PredictLine(const uint8_t* src, const uint8_t* pred, + uint8_t* dst, int length, int inverse) { + int i; + if (inverse) { + for (i = 0; i < length; ++i) dst[i] = src[i] + pred[i]; + } else { + for (i = 0; i < length; ++i) dst[i] = src[i] - pred[i]; + } +} + +//------------------------------------------------------------------------------ +// Horizontal filter. + +static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in, + int width, int height, int bpp, int stride, int inverse, uint8_t* out) { + int h; + const uint8_t* preds = (inverse ? out : in); + SANITY_CHECK(in, out); + + // Filter line-by-line. + for (h = 0; h < height; ++h) { + // Leftmost pixel is predicted from above (except for topmost scanline). + if (h == 0) { + memcpy((void*)out, (const void*)in, bpp); + } else { + PredictLine(in, preds - stride, out, bpp, inverse); + } + PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); + preds += stride; + in += stride; + out += stride; + } +} + +static void HorizontalFilter(const uint8_t* data, int width, int height, + int bpp, int stride, uint8_t* filtered_data) { + DoHorizontalFilter(data, width, height, bpp, stride, 0, filtered_data); +} + +static void HorizontalUnfilter(const uint8_t* data, int width, int height, + int bpp, int stride, uint8_t* recon_data) { + DoHorizontalFilter(data, width, height, bpp, stride, 1, recon_data); +} + +//------------------------------------------------------------------------------ +// Vertical filter. + +static WEBP_INLINE void DoVerticalFilter(const uint8_t* in, + int width, int height, int bpp, int stride, int inverse, uint8_t* out) { + int h; + const uint8_t* preds = (inverse ? out : in); + SANITY_CHECK(in, out); + + // Very first top-left pixel is copied. + memcpy((void*)out, (const void*)in, bpp); + // Rest of top scan-line is left-predicted. + PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); + + // Filter line-by-line. + for (h = 1; h < height; ++h) { + in += stride; + out += stride; + PredictLine(in, preds, out, bpp * width, inverse); + preds += stride; + } +} + +static void VerticalFilter(const uint8_t* data, int width, int height, + int bpp, int stride, uint8_t* filtered_data) { + DoVerticalFilter(data, width, height, bpp, stride, 0, filtered_data); +} + +static void VerticalUnfilter(const uint8_t* data, int width, int height, + int bpp, int stride, uint8_t* recon_data) { + DoVerticalFilter(data, width, height, bpp, stride, 1, recon_data); +} + +//------------------------------------------------------------------------------ +// Gradient filter. + +static WEBP_INLINE int GradientPredictor(uint8_t a, uint8_t b, uint8_t c) { + const int g = a + b - c; + return (g < 0) ? 0 : (g > 255) ? 255 : g; +} + +static WEBP_INLINE +void DoGradientFilter(const uint8_t* in, int width, int height, + int bpp, int stride, int inverse, uint8_t* out) { + const uint8_t* preds = (inverse ? out : in); + int h; + SANITY_CHECK(in, out); + + // left prediction for top scan-line + memcpy((void*)out, (const void*)in, bpp); + PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); + + // Filter line-by-line. + for (h = 1; h < height; ++h) { + int w; + preds += stride; + in += stride; + out += stride; + // leftmost pixel: predict from above. + PredictLine(in, preds - stride, out, bpp, inverse); + for (w = bpp; w < width * bpp; ++w) { + const int pred = GradientPredictor(preds[w - bpp], + preds[w - stride], + preds[w - stride - bpp]); + out[w] = in[w] + (inverse ? pred : -pred); + } + } +} + +static void GradientFilter(const uint8_t* data, int width, int height, + int bpp, int stride, uint8_t* filtered_data) { + DoGradientFilter(data, width, height, bpp, stride, 0, filtered_data); +} + +static void GradientUnfilter(const uint8_t* data, int width, int height, + int bpp, int stride, uint8_t* recon_data) { + DoGradientFilter(data, width, height, bpp, stride, 1, recon_data); +} + +#undef SANITY_CHECK + +// ----------------------------------------------------------------------------- +// Quick estimate of a potentially interesting filter mode to try, in addition +// to the default NONE. + +#define SMAX 16 +#define SDIFF(a, b) (abs((a) - (b)) >> 4) // Scoring diff, in [0..SMAX) + +WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, + int width, int height, int stride) { + int i, j; + int bins[WEBP_FILTER_LAST][SMAX]; + memset(bins, 0, sizeof(bins)); + // We only sample every other pixels. That's enough. + for (j = 2; j < height - 1; j += 2) { + const uint8_t* const p = data + j * stride; + int mean = p[0]; + for (i = 2; i < width - 1; i += 2) { + const int diff0 = SDIFF(p[i], mean); + const int diff1 = SDIFF(p[i], p[i - 1]); + const int diff2 = SDIFF(p[i], p[i - width]); + const int grad_pred = + GradientPredictor(p[i - 1], p[i - width], p[i - width - 1]); + const int diff3 = SDIFF(p[i], grad_pred); + bins[WEBP_FILTER_NONE][diff0] = 1; + bins[WEBP_FILTER_HORIZONTAL][diff1] = 1; + bins[WEBP_FILTER_VERTICAL][diff2] = 1; + bins[WEBP_FILTER_GRADIENT][diff3] = 1; + mean = (3 * mean + p[i] + 2) >> 2; + } + } + { + WEBP_FILTER_TYPE filter, best_filter = WEBP_FILTER_NONE; + int best_score = 0x7fffffff; + for (filter = WEBP_FILTER_NONE; filter < WEBP_FILTER_LAST; ++filter) { + int score = 0; + for (i = 0; i < SMAX; ++i) { + if (bins[filter][i] > 0) { + score += i; + } + } + if (score < best_score) { + best_score = score; + best_filter = filter; + } + } + return best_filter; + } +} + +#undef SMAX +#undef SDIFF + +//------------------------------------------------------------------------------ + +const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST] = { + NULL, // WEBP_FILTER_NONE + HorizontalFilter, // WEBP_FILTER_HORIZONTAL + VerticalFilter, // WEBP_FILTER_VERTICAL + GradientFilter // WEBP_FILTER_GRADIENT +}; + +const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST] = { + NULL, // WEBP_FILTER_NONE + HorizontalUnfilter, // WEBP_FILTER_HORIZONTAL + VerticalUnfilter, // WEBP_FILTER_VERTICAL + GradientUnfilter // WEBP_FILTER_GRADIENT +}; + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/utils/filters.h b/drivers/webpold/utils/filters.h new file mode 100644 index 0000000000..db886be29a --- /dev/null +++ b/drivers/webpold/utils/filters.h @@ -0,0 +1,54 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Spatial prediction using various filters +// +// Author: Urvang (urvang@google.com) + +#ifndef WEBP_UTILS_FILTERS_H_ +#define WEBP_UTILS_FILTERS_H_ + +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// Filters. +typedef enum { + WEBP_FILTER_NONE = 0, + WEBP_FILTER_HORIZONTAL, + WEBP_FILTER_VERTICAL, + WEBP_FILTER_GRADIENT, + WEBP_FILTER_LAST = WEBP_FILTER_GRADIENT + 1, // end marker + WEBP_FILTER_BEST, + WEBP_FILTER_FAST +} WEBP_FILTER_TYPE; + +typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height, + int bpp, int stride, uint8_t* out); + +// Filter the given data using the given predictor. +// 'in' corresponds to a 2-dimensional pixel array of size (stride * height) +// in raster order. +// 'bpp' is number of bytes per pixel, and +// 'stride' is number of bytes per scan line (with possible padding). +// 'out' should be pre-allocated. +extern const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST]; + +// Reconstruct the original data from the given filtered data. +extern const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST]; + +// Fast estimate of a potentially good filter. +extern WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, + int width, int height, int stride); + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_UTILS_FILTERS_H_ */ diff --git a/drivers/webpold/utils/huffman.c b/drivers/webpold/utils/huffman.c new file mode 100644 index 0000000000..1cc1cfd355 --- /dev/null +++ b/drivers/webpold/utils/huffman.c @@ -0,0 +1,238 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Utilities for building and looking up Huffman trees. +// +// Author: Urvang Joshi (urvang@google.com) + +#include <assert.h> +#include <stdlib.h> +#include "./huffman.h" +#include "../utils/utils.h" +#include "../format_constants.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define NON_EXISTENT_SYMBOL (-1) + +static void TreeNodeInit(HuffmanTreeNode* const node) { + node->children_ = -1; // means: 'unassigned so far' +} + +static int NodeIsEmpty(const HuffmanTreeNode* const node) { + return (node->children_ < 0); +} + +static int IsFull(const HuffmanTree* const tree) { + return (tree->num_nodes_ == tree->max_nodes_); +} + +static void AssignChildren(HuffmanTree* const tree, + HuffmanTreeNode* const node) { + HuffmanTreeNode* const children = tree->root_ + tree->num_nodes_; + node->children_ = (int)(children - node); + assert(children - node == (int)(children - node)); + tree->num_nodes_ += 2; + TreeNodeInit(children + 0); + TreeNodeInit(children + 1); +} + +static int TreeInit(HuffmanTree* const tree, int num_leaves) { + assert(tree != NULL); + if (num_leaves == 0) return 0; + // We allocate maximum possible nodes in the tree at once. + // Note that a Huffman tree is a full binary tree; and in a full binary tree + // with L leaves, the total number of nodes N = 2 * L - 1. + tree->max_nodes_ = 2 * num_leaves - 1; + tree->root_ = (HuffmanTreeNode*)WebPSafeMalloc((uint64_t)tree->max_nodes_, + sizeof(*tree->root_)); + if (tree->root_ == NULL) return 0; + TreeNodeInit(tree->root_); // Initialize root. + tree->num_nodes_ = 1; + return 1; +} + +void HuffmanTreeRelease(HuffmanTree* const tree) { + if (tree != NULL) { + free(tree->root_); + tree->root_ = NULL; + tree->max_nodes_ = 0; + tree->num_nodes_ = 0; + } +} + +int HuffmanCodeLengthsToCodes(const int* const code_lengths, + int code_lengths_size, int* const huff_codes) { + int symbol; + int code_len; + int code_length_hist[MAX_ALLOWED_CODE_LENGTH + 1] = { 0 }; + int curr_code; + int next_codes[MAX_ALLOWED_CODE_LENGTH + 1] = { 0 }; + int max_code_length = 0; + + assert(code_lengths != NULL); + assert(code_lengths_size > 0); + assert(huff_codes != NULL); + + // Calculate max code length. + for (symbol = 0; symbol < code_lengths_size; ++symbol) { + if (code_lengths[symbol] > max_code_length) { + max_code_length = code_lengths[symbol]; + } + } + if (max_code_length > MAX_ALLOWED_CODE_LENGTH) return 0; + + // Calculate code length histogram. + for (symbol = 0; symbol < code_lengths_size; ++symbol) { + ++code_length_hist[code_lengths[symbol]]; + } + code_length_hist[0] = 0; + + // Calculate the initial values of 'next_codes' for each code length. + // next_codes[code_len] denotes the code to be assigned to the next symbol + // of code length 'code_len'. + curr_code = 0; + next_codes[0] = -1; // Unused, as code length = 0 implies code doesn't exist. + for (code_len = 1; code_len <= max_code_length; ++code_len) { + curr_code = (curr_code + code_length_hist[code_len - 1]) << 1; + next_codes[code_len] = curr_code; + } + + // Get symbols. + for (symbol = 0; symbol < code_lengths_size; ++symbol) { + if (code_lengths[symbol] > 0) { + huff_codes[symbol] = next_codes[code_lengths[symbol]]++; + } else { + huff_codes[symbol] = NON_EXISTENT_SYMBOL; + } + } + return 1; +} + +static int TreeAddSymbol(HuffmanTree* const tree, + int symbol, int code, int code_length) { + HuffmanTreeNode* node = tree->root_; + const HuffmanTreeNode* const max_node = tree->root_ + tree->max_nodes_; + while (code_length-- > 0) { + if (node >= max_node) { + return 0; + } + if (NodeIsEmpty(node)) { + if (IsFull(tree)) return 0; // error: too many symbols. + AssignChildren(tree, node); + } else if (HuffmanTreeNodeIsLeaf(node)) { + return 0; // leaf is already occupied. + } + node += node->children_ + ((code >> code_length) & 1); + } + if (NodeIsEmpty(node)) { + node->children_ = 0; // turn newly created node into a leaf. + } else if (!HuffmanTreeNodeIsLeaf(node)) { + return 0; // trying to assign a symbol to already used code. + } + node->symbol_ = symbol; // Add symbol in this node. + return 1; +} + +int HuffmanTreeBuildImplicit(HuffmanTree* const tree, + const int* const code_lengths, + int code_lengths_size) { + int symbol; + int num_symbols = 0; + int root_symbol = 0; + + assert(tree != NULL); + assert(code_lengths != NULL); + + // Find out number of symbols and the root symbol. + for (symbol = 0; symbol < code_lengths_size; ++symbol) { + if (code_lengths[symbol] > 0) { + // Note: code length = 0 indicates non-existent symbol. + ++num_symbols; + root_symbol = symbol; + } + } + + // Initialize the tree. Will fail for num_symbols = 0 + if (!TreeInit(tree, num_symbols)) return 0; + + // Build tree. + if (num_symbols == 1) { // Trivial case. + const int max_symbol = code_lengths_size; + if (root_symbol < 0 || root_symbol >= max_symbol) { + HuffmanTreeRelease(tree); + return 0; + } + return TreeAddSymbol(tree, root_symbol, 0, 0); + } else { // Normal case. + int ok = 0; + + // Get Huffman codes from the code lengths. + int* const codes = + (int*)WebPSafeMalloc((uint64_t)code_lengths_size, sizeof(*codes)); + if (codes == NULL) goto End; + + if (!HuffmanCodeLengthsToCodes(code_lengths, code_lengths_size, codes)) { + goto End; + } + + // Add symbols one-by-one. + for (symbol = 0; symbol < code_lengths_size; ++symbol) { + if (code_lengths[symbol] > 0) { + if (!TreeAddSymbol(tree, symbol, codes[symbol], code_lengths[symbol])) { + goto End; + } + } + } + ok = 1; + End: + free(codes); + ok = ok && IsFull(tree); + if (!ok) HuffmanTreeRelease(tree); + return ok; + } +} + +int HuffmanTreeBuildExplicit(HuffmanTree* const tree, + const int* const code_lengths, + const int* const codes, + const int* const symbols, int max_symbol, + int num_symbols) { + int ok = 0; + int i; + + assert(tree != NULL); + assert(code_lengths != NULL); + assert(codes != NULL); + assert(symbols != NULL); + + // Initialize the tree. Will fail if num_symbols = 0. + if (!TreeInit(tree, num_symbols)) return 0; + + // Add symbols one-by-one. + for (i = 0; i < num_symbols; ++i) { + if (codes[i] != NON_EXISTENT_SYMBOL) { + if (symbols[i] < 0 || symbols[i] >= max_symbol) { + goto End; + } + if (!TreeAddSymbol(tree, symbols[i], codes[i], code_lengths[i])) { + goto End; + } + } + } + ok = 1; + End: + ok = ok && IsFull(tree); + if (!ok) HuffmanTreeRelease(tree); + return ok; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/utils/huffman.h b/drivers/webpold/utils/huffman.h new file mode 100644 index 0000000000..f16447e649 --- /dev/null +++ b/drivers/webpold/utils/huffman.h @@ -0,0 +1,78 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Utilities for building and looking up Huffman trees. +// +// Author: Urvang Joshi (urvang@google.com) + +#ifndef WEBP_UTILS_HUFFMAN_H_ +#define WEBP_UTILS_HUFFMAN_H_ + +#include <assert.h> +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// A node of a Huffman tree. +typedef struct { + int symbol_; + int children_; // delta offset to both children (contiguous) or 0 if leaf. +} HuffmanTreeNode; + +// Huffman Tree. +typedef struct HuffmanTree HuffmanTree; +struct HuffmanTree { + HuffmanTreeNode* root_; // all the nodes, starting at root. + int max_nodes_; // max number of nodes + int num_nodes_; // number of currently occupied nodes +}; + +// Returns true if the given node is a leaf of the Huffman tree. +static WEBP_INLINE int HuffmanTreeNodeIsLeaf( + const HuffmanTreeNode* const node) { + return (node->children_ == 0); +} + +// Go down one level. Most critical function. 'right_child' must be 0 or 1. +static WEBP_INLINE const HuffmanTreeNode* HuffmanTreeNextNode( + const HuffmanTreeNode* node, int right_child) { + return node + node->children_ + right_child; +} + +// Releases the nodes of the Huffman tree. +// Note: It does NOT free 'tree' itself. +void HuffmanTreeRelease(HuffmanTree* const tree); + +// Builds Huffman tree assuming code lengths are implicitly in symbol order. +// Returns false in case of error (invalid tree or memory error). +int HuffmanTreeBuildImplicit(HuffmanTree* const tree, + const int* const code_lengths, + int code_lengths_size); + +// Build a Huffman tree with explicitly given lists of code lengths, codes +// and symbols. Verifies that all symbols added are smaller than max_symbol. +// Returns false in case of an invalid symbol, invalid tree or memory error. +int HuffmanTreeBuildExplicit(HuffmanTree* const tree, + const int* const code_lengths, + const int* const codes, + const int* const symbols, int max_symbol, + int num_symbols); + +// Utility: converts Huffman code lengths to corresponding Huffman codes. +// 'huff_codes' should be pre-allocated. +// Returns false in case of error (memory allocation, invalid codes). +int HuffmanCodeLengthsToCodes(const int* const code_lengths, + int code_lengths_size, int* const huff_codes); + + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif // WEBP_UTILS_HUFFMAN_H_ diff --git a/drivers/webpold/utils/huffman_encode.c b/drivers/webpold/utils/huffman_encode.c new file mode 100644 index 0000000000..e172b10a85 --- /dev/null +++ b/drivers/webpold/utils/huffman_encode.c @@ -0,0 +1,439 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Author: Jyrki Alakuijala (jyrki@google.com) +// +// Entropy encoding (Huffman) for webp lossless. + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include "./huffman_encode.h" +#include "../utils/utils.h" +#include "../format_constants.h" + +// ----------------------------------------------------------------------------- +// Util function to optimize the symbol map for RLE coding + +// Heuristics for selecting the stride ranges to collapse. +static int ValuesShouldBeCollapsedToStrideAverage(int a, int b) { + return abs(a - b) < 4; +} + +// Change the population counts in a way that the consequent +// Hufmann tree compression, especially its RLE-part, give smaller output. +static int OptimizeHuffmanForRle(int length, int* const counts) { + uint8_t* good_for_rle; + // 1) Let's make the Huffman code more compatible with rle encoding. + int i; + for (; length >= 0; --length) { + if (length == 0) { + return 1; // All zeros. + } + if (counts[length - 1] != 0) { + // Now counts[0..length - 1] does not have trailing zeros. + break; + } + } + // 2) Let's mark all population counts that already can be encoded + // with an rle code. + good_for_rle = (uint8_t*)calloc(length, 1); + if (good_for_rle == NULL) { + return 0; + } + { + // Let's not spoil any of the existing good rle codes. + // Mark any seq of 0's that is longer as 5 as a good_for_rle. + // Mark any seq of non-0's that is longer as 7 as a good_for_rle. + int symbol = counts[0]; + int stride = 0; + for (i = 0; i < length + 1; ++i) { + if (i == length || counts[i] != symbol) { + if ((symbol == 0 && stride >= 5) || + (symbol != 0 && stride >= 7)) { + int k; + for (k = 0; k < stride; ++k) { + good_for_rle[i - k - 1] = 1; + } + } + stride = 1; + if (i != length) { + symbol = counts[i]; + } + } else { + ++stride; + } + } + } + // 3) Let's replace those population counts that lead to more rle codes. + { + int stride = 0; + int limit = counts[0]; + int sum = 0; + for (i = 0; i < length + 1; ++i) { + if (i == length || good_for_rle[i] || + (i != 0 && good_for_rle[i - 1]) || + !ValuesShouldBeCollapsedToStrideAverage(counts[i], limit)) { + if (stride >= 4 || (stride >= 3 && sum == 0)) { + int k; + // The stride must end, collapse what we have, if we have enough (4). + int count = (sum + stride / 2) / stride; + if (count < 1) { + count = 1; + } + if (sum == 0) { + // Don't make an all zeros stride to be upgraded to ones. + count = 0; + } + for (k = 0; k < stride; ++k) { + // We don't want to change value at counts[i], + // that is already belonging to the next stride. Thus - 1. + counts[i - k - 1] = count; + } + } + stride = 0; + sum = 0; + if (i < length - 3) { + // All interesting strides have a count of at least 4, + // at least when non-zeros. + limit = (counts[i] + counts[i + 1] + + counts[i + 2] + counts[i + 3] + 2) / 4; + } else if (i < length) { + limit = counts[i]; + } else { + limit = 0; + } + } + ++stride; + if (i != length) { + sum += counts[i]; + if (stride >= 4) { + limit = (sum + stride / 2) / stride; + } + } + } + } + free(good_for_rle); + return 1; +} + +typedef struct { + int total_count_; + int value_; + int pool_index_left_; + int pool_index_right_; +} HuffmanTree; + +// A comparer function for two Huffman trees: sorts first by 'total count' +// (more comes first), and then by 'value' (more comes first). +static int CompareHuffmanTrees(const void* ptr1, const void* ptr2) { + const HuffmanTree* const t1 = (const HuffmanTree*)ptr1; + const HuffmanTree* const t2 = (const HuffmanTree*)ptr2; + if (t1->total_count_ > t2->total_count_) { + return -1; + } else if (t1->total_count_ < t2->total_count_) { + return 1; + } else { + if (t1->value_ < t2->value_) { + return -1; + } + if (t1->value_ > t2->value_) { + return 1; + } + return 0; + } +} + +static void SetBitDepths(const HuffmanTree* const tree, + const HuffmanTree* const pool, + uint8_t* const bit_depths, int level) { + if (tree->pool_index_left_ >= 0) { + SetBitDepths(&pool[tree->pool_index_left_], pool, bit_depths, level + 1); + SetBitDepths(&pool[tree->pool_index_right_], pool, bit_depths, level + 1); + } else { + bit_depths[tree->value_] = level; + } +} + +// Create an optimal Huffman tree. +// +// (data,length): population counts. +// tree_limit: maximum bit depth (inclusive) of the codes. +// bit_depths[]: how many bits are used for the symbol. +// +// Returns 0 when an error has occurred. +// +// The catch here is that the tree cannot be arbitrarily deep +// +// count_limit is the value that is to be faked as the minimum value +// and this minimum value is raised until the tree matches the +// maximum length requirement. +// +// This algorithm is not of excellent performance for very long data blocks, +// especially when population counts are longer than 2**tree_limit, but +// we are not planning to use this with extremely long blocks. +// +// See http://en.wikipedia.org/wiki/Huffman_coding +static int GenerateOptimalTree(const int* const histogram, int histogram_size, + int tree_depth_limit, + uint8_t* const bit_depths) { + int count_min; + HuffmanTree* tree_pool; + HuffmanTree* tree; + int tree_size_orig = 0; + int i; + + for (i = 0; i < histogram_size; ++i) { + if (histogram[i] != 0) { + ++tree_size_orig; + } + } + + // 3 * tree_size is enough to cover all the nodes representing a + // population and all the inserted nodes combining two existing nodes. + // The tree pool needs 2 * (tree_size_orig - 1) entities, and the + // tree needs exactly tree_size_orig entities. + tree = (HuffmanTree*)WebPSafeMalloc(3ULL * tree_size_orig, sizeof(*tree)); + if (tree == NULL) return 0; + tree_pool = tree + tree_size_orig; + + // For block sizes with less than 64k symbols we never need to do a + // second iteration of this loop. + // If we actually start running inside this loop a lot, we would perhaps + // be better off with the Katajainen algorithm. + assert(tree_size_orig <= (1 << (tree_depth_limit - 1))); + for (count_min = 1; ; count_min *= 2) { + int tree_size = tree_size_orig; + // We need to pack the Huffman tree in tree_depth_limit bits. + // So, we try by faking histogram entries to be at least 'count_min'. + int idx = 0; + int j; + for (j = 0; j < histogram_size; ++j) { + if (histogram[j] != 0) { + const int count = + (histogram[j] < count_min) ? count_min : histogram[j]; + tree[idx].total_count_ = count; + tree[idx].value_ = j; + tree[idx].pool_index_left_ = -1; + tree[idx].pool_index_right_ = -1; + ++idx; + } + } + + // Build the Huffman tree. + qsort(tree, tree_size, sizeof(*tree), CompareHuffmanTrees); + + if (tree_size > 1) { // Normal case. + int tree_pool_size = 0; + while (tree_size > 1) { // Finish when we have only one root. + int count; + tree_pool[tree_pool_size++] = tree[tree_size - 1]; + tree_pool[tree_pool_size++] = tree[tree_size - 2]; + count = tree_pool[tree_pool_size - 1].total_count_ + + tree_pool[tree_pool_size - 2].total_count_; + tree_size -= 2; + { + // Search for the insertion point. + int k; + for (k = 0; k < tree_size; ++k) { + if (tree[k].total_count_ <= count) { + break; + } + } + memmove(tree + (k + 1), tree + k, (tree_size - k) * sizeof(*tree)); + tree[k].total_count_ = count; + tree[k].value_ = -1; + + tree[k].pool_index_left_ = tree_pool_size - 1; + tree[k].pool_index_right_ = tree_pool_size - 2; + tree_size = tree_size + 1; + } + } + SetBitDepths(&tree[0], tree_pool, bit_depths, 0); + } else if (tree_size == 1) { // Trivial case: only one element. + bit_depths[tree[0].value_] = 1; + } + + { + // Test if this Huffman tree satisfies our 'tree_depth_limit' criteria. + int max_depth = bit_depths[0]; + for (j = 1; j < histogram_size; ++j) { + if (max_depth < bit_depths[j]) { + max_depth = bit_depths[j]; + } + } + if (max_depth <= tree_depth_limit) { + break; + } + } + } + free(tree); + return 1; +} + +// ----------------------------------------------------------------------------- +// Coding of the Huffman tree values + +static HuffmanTreeToken* CodeRepeatedValues(int repetitions, + HuffmanTreeToken* tokens, + int value, int prev_value) { + assert(value <= MAX_ALLOWED_CODE_LENGTH); + if (value != prev_value) { + tokens->code = value; + tokens->extra_bits = 0; + ++tokens; + --repetitions; + } + while (repetitions >= 1) { + if (repetitions < 3) { + int i; + for (i = 0; i < repetitions; ++i) { + tokens->code = value; + tokens->extra_bits = 0; + ++tokens; + } + break; + } else if (repetitions < 7) { + tokens->code = 16; + tokens->extra_bits = repetitions - 3; + ++tokens; + break; + } else { + tokens->code = 16; + tokens->extra_bits = 3; + ++tokens; + repetitions -= 6; + } + } + return tokens; +} + +static HuffmanTreeToken* CodeRepeatedZeros(int repetitions, + HuffmanTreeToken* tokens) { + while (repetitions >= 1) { + if (repetitions < 3) { + int i; + for (i = 0; i < repetitions; ++i) { + tokens->code = 0; // 0-value + tokens->extra_bits = 0; + ++tokens; + } + break; + } else if (repetitions < 11) { + tokens->code = 17; + tokens->extra_bits = repetitions - 3; + ++tokens; + break; + } else if (repetitions < 139) { + tokens->code = 18; + tokens->extra_bits = repetitions - 11; + ++tokens; + break; + } else { + tokens->code = 18; + tokens->extra_bits = 0x7f; // 138 repeated 0s + ++tokens; + repetitions -= 138; + } + } + return tokens; +} + +int VP8LCreateCompressedHuffmanTree(const HuffmanTreeCode* const tree, + HuffmanTreeToken* tokens, int max_tokens) { + HuffmanTreeToken* const starting_token = tokens; + HuffmanTreeToken* const ending_token = tokens + max_tokens; + const int depth_size = tree->num_symbols; + int prev_value = 8; // 8 is the initial value for rle. + int i = 0; + assert(tokens != NULL); + while (i < depth_size) { + const int value = tree->code_lengths[i]; + int k = i + 1; + int runs; + while (k < depth_size && tree->code_lengths[k] == value) ++k; + runs = k - i; + if (value == 0) { + tokens = CodeRepeatedZeros(runs, tokens); + } else { + tokens = CodeRepeatedValues(runs, tokens, value, prev_value); + prev_value = value; + } + i += runs; + assert(tokens <= ending_token); + } + (void)ending_token; // suppress 'unused variable' warning + return (int)(tokens - starting_token); +} + +// ----------------------------------------------------------------------------- + +// Pre-reversed 4-bit values. +static const uint8_t kReversedBits[16] = { + 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe, + 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf +}; + +static uint32_t ReverseBits(int num_bits, uint32_t bits) { + uint32_t retval = 0; + int i = 0; + while (i < num_bits) { + i += 4; + retval |= kReversedBits[bits & 0xf] << (MAX_ALLOWED_CODE_LENGTH + 1 - i); + bits >>= 4; + } + retval >>= (MAX_ALLOWED_CODE_LENGTH + 1 - num_bits); + return retval; +} + +// Get the actual bit values for a tree of bit depths. +static void ConvertBitDepthsToSymbols(HuffmanTreeCode* const tree) { + // 0 bit-depth means that the symbol does not exist. + int i; + int len; + uint32_t next_code[MAX_ALLOWED_CODE_LENGTH + 1]; + int depth_count[MAX_ALLOWED_CODE_LENGTH + 1] = { 0 }; + + assert(tree != NULL); + len = tree->num_symbols; + for (i = 0; i < len; ++i) { + const int code_length = tree->code_lengths[i]; + assert(code_length <= MAX_ALLOWED_CODE_LENGTH); + ++depth_count[code_length]; + } + depth_count[0] = 0; // ignore unused symbol + next_code[0] = 0; + { + uint32_t code = 0; + for (i = 1; i <= MAX_ALLOWED_CODE_LENGTH; ++i) { + code = (code + depth_count[i - 1]) << 1; + next_code[i] = code; + } + } + for (i = 0; i < len; ++i) { + const int code_length = tree->code_lengths[i]; + tree->codes[i] = ReverseBits(code_length, next_code[code_length]++); + } +} + +// ----------------------------------------------------------------------------- +// Main entry point + +int VP8LCreateHuffmanTree(int* const histogram, int tree_depth_limit, + HuffmanTreeCode* const tree) { + const int num_symbols = tree->num_symbols; + if (!OptimizeHuffmanForRle(num_symbols, histogram)) { + return 0; + } + if (!GenerateOptimalTree(histogram, num_symbols, + tree_depth_limit, tree->code_lengths)) { + return 0; + } + // Create the actual bit codes for the bit lengths. + ConvertBitDepthsToSymbols(tree); + return 1; +} diff --git a/drivers/webpold/utils/huffman_encode.h b/drivers/webpold/utils/huffman_encode.h new file mode 100644 index 0000000000..7f4aedc102 --- /dev/null +++ b/drivers/webpold/utils/huffman_encode.h @@ -0,0 +1,47 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Author: Jyrki Alakuijala (jyrki@google.com) +// +// Entropy encoding (Huffman) for webp lossless + +#ifndef WEBP_UTILS_HUFFMAN_ENCODE_H_ +#define WEBP_UTILS_HUFFMAN_ENCODE_H_ + +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// Struct for holding the tree header in coded form. +typedef struct { + uint8_t code; // value (0..15) or escape code (16,17,18) + uint8_t extra_bits; // extra bits for escape codes +} HuffmanTreeToken; + +// Struct to represent the tree codes (depth and bits array). +typedef struct { + int num_symbols; // Number of symbols. + uint8_t* code_lengths; // Code lengths of the symbols. + uint16_t* codes; // Symbol Codes. +} HuffmanTreeCode; + +// Turn the Huffman tree into a token sequence. +// Returns the number of tokens used. +int VP8LCreateCompressedHuffmanTree(const HuffmanTreeCode* const tree, + HuffmanTreeToken* tokens, int max_tokens); + +// Create an optimized tree, and tokenize it. +int VP8LCreateHuffmanTree(int* const histogram, int tree_depth_limit, + HuffmanTreeCode* const tree); + +#if defined(__cplusplus) || defined(c_plusplus) +} +#endif + +#endif // WEBP_UTILS_HUFFMAN_ENCODE_H_ diff --git a/drivers/webpold/utils/quant_levels.c b/drivers/webpold/utils/quant_levels.c new file mode 100644 index 0000000000..f6884392aa --- /dev/null +++ b/drivers/webpold/utils/quant_levels.c @@ -0,0 +1,154 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Quantize levels for specified number of quantization-levels ([2, 256]). +// Min and max values are preserved (usual 0 and 255 for alpha plane). +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> + +#include "./quant_levels.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define NUM_SYMBOLS 256 + +#define MAX_ITER 6 // Maximum number of convergence steps. +#define ERROR_THRESHOLD 1e-4 // MSE stopping criterion. + +// ----------------------------------------------------------------------------- +// Quantize levels. + +int QuantizeLevels(uint8_t* const data, int width, int height, + int num_levels, uint64_t* const sse) { + int freq[NUM_SYMBOLS] = { 0 }; + int q_level[NUM_SYMBOLS] = { 0 }; + double inv_q_level[NUM_SYMBOLS] = { 0 }; + int min_s = 255, max_s = 0; + const size_t data_size = height * width; + int i, num_levels_in, iter; + double last_err = 1.e38, err = 0.; + const double err_threshold = ERROR_THRESHOLD * data_size; + + if (data == NULL) { + return 0; + } + + if (width <= 0 || height <= 0) { + return 0; + } + + if (num_levels < 2 || num_levels > 256) { + return 0; + } + + { + size_t n; + num_levels_in = 0; + for (n = 0; n < data_size; ++n) { + num_levels_in += (freq[data[n]] == 0); + if (min_s > data[n]) min_s = data[n]; + if (max_s < data[n]) max_s = data[n]; + ++freq[data[n]]; + } + } + + if (num_levels_in <= num_levels) goto End; // nothing to do! + + // Start with uniformly spread centroids. + for (i = 0; i < num_levels; ++i) { + inv_q_level[i] = min_s + (double)(max_s - min_s) * i / (num_levels - 1); + } + + // Fixed values. Won't be changed. + q_level[min_s] = 0; + q_level[max_s] = num_levels - 1; + assert(inv_q_level[0] == min_s); + assert(inv_q_level[num_levels - 1] == max_s); + + // k-Means iterations. + for (iter = 0; iter < MAX_ITER; ++iter) { + double q_sum[NUM_SYMBOLS] = { 0 }; + double q_count[NUM_SYMBOLS] = { 0 }; + int s, slot = 0; + + // Assign classes to representatives. + for (s = min_s; s <= max_s; ++s) { + // Keep track of the nearest neighbour 'slot' + while (slot < num_levels - 1 && + 2 * s > inv_q_level[slot] + inv_q_level[slot + 1]) { + ++slot; + } + if (freq[s] > 0) { + q_sum[slot] += s * freq[s]; + q_count[slot] += freq[s]; + } + q_level[s] = slot; + } + + // Assign new representatives to classes. + if (num_levels > 2) { + for (slot = 1; slot < num_levels - 1; ++slot) { + const double count = q_count[slot]; + if (count > 0.) { + inv_q_level[slot] = q_sum[slot] / count; + } + } + } + + // Compute convergence error. + err = 0.; + for (s = min_s; s <= max_s; ++s) { + const double error = s - inv_q_level[q_level[s]]; + err += freq[s] * error * error; + } + + // Check for convergence: we stop as soon as the error is no + // longer improving. + if (last_err - err < err_threshold) break; + last_err = err; + } + + // Remap the alpha plane to quantized values. + { + // double->int rounding operation can be costly, so we do it + // once for all before remapping. We also perform the data[] -> slot + // mapping, while at it (avoid one indirection in the final loop). + uint8_t map[NUM_SYMBOLS]; + int s; + size_t n; + for (s = min_s; s <= max_s; ++s) { + const int slot = q_level[s]; + map[s] = (uint8_t)(inv_q_level[slot] + .5); + } + // Final pass. + for (n = 0; n < data_size; ++n) { + data[n] = map[data[n]]; + } + } + End: + // Store sum of squared error if needed. + if (sse != NULL) *sse = (uint64_t)err; + + return 1; +} + +int DequantizeLevels(uint8_t* const data, int width, int height) { + if (data == NULL || width <= 0 || height <= 0) return 0; + // TODO(skal): implement gradient smoothing. + (void)data; + (void)width; + (void)height; + return 1; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/utils/quant_levels.h b/drivers/webpold/utils/quant_levels.h new file mode 100644 index 0000000000..4f165fd230 --- /dev/null +++ b/drivers/webpold/utils/quant_levels.h @@ -0,0 +1,39 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Alpha plane quantization utility +// +// Author: Vikas Arora (vikasa@google.com) + +#ifndef WEBP_UTILS_QUANT_LEVELS_H_ +#define WEBP_UTILS_QUANT_LEVELS_H_ + +#include <stdlib.h> + +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +// Replace the input 'data' of size 'width'x'height' with 'num-levels' +// quantized values. If not NULL, 'sse' will contain the sum of squared error. +// Valid range for 'num_levels' is [2, 256]. +// Returns false in case of error (data is NULL, or parameters are invalid). +int QuantizeLevels(uint8_t* const data, int width, int height, int num_levels, + uint64_t* const sse); + +// Apply post-processing to input 'data' of size 'width'x'height' assuming +// that the source was quantized to a reduced number of levels. +// Returns false in case of error (data is NULL, invalid parameters, ...). +int DequantizeLevels(uint8_t* const data, int width, int height); + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_UTILS_QUANT_LEVELS_H_ */ diff --git a/drivers/webpold/utils/rescaler.c b/drivers/webpold/utils/rescaler.c new file mode 100644 index 0000000000..9825dcbc5f --- /dev/null +++ b/drivers/webpold/utils/rescaler.c @@ -0,0 +1,152 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Rescaling functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include "./rescaler.h" + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define RFIX 30 +#define MULT_FIX(x,y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX) + +void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height, + uint8_t* const dst, int dst_width, int dst_height, + int dst_stride, int num_channels, int x_add, int x_sub, + int y_add, int y_sub, int32_t* const work) { + wrk->x_expand = (src_width < dst_width); + wrk->src_width = src_width; + wrk->src_height = src_height; + wrk->dst_width = dst_width; + wrk->dst_height = dst_height; + wrk->dst = dst; + wrk->dst_stride = dst_stride; + wrk->num_channels = num_channels; + // for 'x_expand', we use bilinear interpolation + wrk->x_add = wrk->x_expand ? (x_sub - 1) : x_add - x_sub; + wrk->x_sub = wrk->x_expand ? (x_add - 1) : x_sub; + wrk->y_accum = y_add; + wrk->y_add = y_add; + wrk->y_sub = y_sub; + wrk->fx_scale = (1 << RFIX) / x_sub; + wrk->fy_scale = (1 << RFIX) / y_sub; + wrk->fxy_scale = wrk->x_expand ? + ((int64_t)dst_height << RFIX) / (x_sub * src_height) : + ((int64_t)dst_height << RFIX) / (x_add * src_height); + wrk->irow = work; + wrk->frow = work + num_channels * dst_width; +} + +void WebPRescalerImportRow(WebPRescaler* const wrk, + const uint8_t* const src, int channel) { + const int x_stride = wrk->num_channels; + const int x_out_max = wrk->dst_width * wrk->num_channels; + int x_in = channel; + int x_out; + int accum = 0; + if (!wrk->x_expand) { + int sum = 0; + for (x_out = channel; x_out < x_out_max; x_out += x_stride) { + accum += wrk->x_add; + for (; accum > 0; accum -= wrk->x_sub) { + sum += src[x_in]; + x_in += x_stride; + } + { // Emit next horizontal pixel. + const int32_t base = src[x_in]; + const int32_t frac = base * (-accum); + x_in += x_stride; + wrk->frow[x_out] = (sum + base) * wrk->x_sub - frac; + // fresh fractional start for next pixel + sum = (int)MULT_FIX(frac, wrk->fx_scale); + } + } + } else { // simple bilinear interpolation + int left = src[channel], right = src[channel]; + for (x_out = channel; x_out < x_out_max; x_out += x_stride) { + if (accum < 0) { + left = right; + x_in += x_stride; + right = src[x_in]; + accum += wrk->x_add; + } + wrk->frow[x_out] = right * wrk->x_add + (left - right) * accum; + accum -= wrk->x_sub; + } + } + // Accumulate the new row's contribution + for (x_out = channel; x_out < x_out_max; x_out += x_stride) { + wrk->irow[x_out] += wrk->frow[x_out]; + } +} + +uint8_t* WebPRescalerExportRow(WebPRescaler* const wrk) { + if (wrk->y_accum <= 0) { + int x_out; + uint8_t* const dst = wrk->dst; + int32_t* const irow = wrk->irow; + const int32_t* const frow = wrk->frow; + const int yscale = wrk->fy_scale * (-wrk->y_accum); + const int x_out_max = wrk->dst_width * wrk->num_channels; + + for (x_out = 0; x_out < x_out_max; ++x_out) { + const int frac = (int)MULT_FIX(frow[x_out], yscale); + const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale); + dst[x_out] = (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255; + irow[x_out] = frac; // new fractional start + } + wrk->y_accum += wrk->y_add; + wrk->dst += wrk->dst_stride; + return dst; + } else { + return NULL; + } +} + +#undef MULT_FIX +#undef RFIX + +//------------------------------------------------------------------------------ +// all-in-one calls + +int WebPRescalerImport(WebPRescaler* const wrk, int num_lines, + const uint8_t* src, int src_stride) { + int total_imported = 0; + while (total_imported < num_lines && wrk->y_accum > 0) { + int channel; + for (channel = 0; channel < wrk->num_channels; ++channel) { + WebPRescalerImportRow(wrk, src, channel); + } + src += src_stride; + ++total_imported; + wrk->y_accum -= wrk->y_sub; + } + return total_imported; +} + +int WebPRescalerExport(WebPRescaler* const rescaler) { + int total_exported = 0; + while (WebPRescalerHasPendingOutput(rescaler)) { + WebPRescalerExportRow(rescaler); + ++total_exported; + } + return total_exported; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/utils/rescaler.h b/drivers/webpold/utils/rescaler.h new file mode 100644 index 0000000000..9c9133d19b --- /dev/null +++ b/drivers/webpold/utils/rescaler.h @@ -0,0 +1,76 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Rescaling functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_UTILS_RESCALER_H_ +#define WEBP_UTILS_RESCALER_H_ + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#include "../types.h" + +// Structure used for on-the-fly rescaling +typedef struct { + int x_expand; // true if we're expanding in the x direction + int num_channels; // bytes to jump between pixels + int fy_scale, fx_scale; // fixed-point scaling factor + int64_t fxy_scale; // '' + // we need hpel-precise add/sub increments, for the downsampled U/V planes. + int y_accum; // vertical accumulator + int y_add, y_sub; // vertical increments (add ~= src, sub ~= dst) + int x_add, x_sub; // horizontal increments (add ~= src, sub ~= dst) + int src_width, src_height; // source dimensions + int dst_width, dst_height; // destination dimensions + uint8_t* dst; + int dst_stride; + int32_t* irow, *frow; // work buffer +} WebPRescaler; + +// Initialize a rescaler given scratch area 'work' and dimensions of src & dst. +void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height, + uint8_t* const dst, + int dst_width, int dst_height, int dst_stride, + int num_channels, + int x_add, int x_sub, + int y_add, int y_sub, + int32_t* const work); + +// Import a row of data and save its contribution in the rescaler. +// 'channel' denotes the channel number to be imported. +void WebPRescalerImportRow(WebPRescaler* const rescaler, + const uint8_t* const src, int channel); + +// Import multiple rows over all channels, until at least one row is ready to +// be exported. Returns the actual number of lines that were imported. +int WebPRescalerImport(WebPRescaler* const rescaler, int num_rows, + const uint8_t* src, int src_stride); + +// Return true if there is pending output rows ready. +static WEBP_INLINE +int WebPRescalerHasPendingOutput(const WebPRescaler* const rescaler) { + return (rescaler->y_accum <= 0); +} + +// Export one row from rescaler. Returns the pointer where output was written, +// or NULL if no row was pending. +uint8_t* WebPRescalerExportRow(WebPRescaler* const wrk); + +// Export as many rows as possible. Return the numbers of rows written. +int WebPRescalerExport(WebPRescaler* const wrk); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_UTILS_RESCALER_H_ */ diff --git a/drivers/webpold/utils/thread.c b/drivers/webpold/utils/thread.c new file mode 100644 index 0000000000..ce89cf9dc7 --- /dev/null +++ b/drivers/webpold/utils/thread.c @@ -0,0 +1,247 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Multi-threaded worker +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <assert.h> +#include <string.h> // for memset() +#include "./thread.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#ifdef WEBP_USE_THREAD + +#if defined(_WIN32) + +//------------------------------------------------------------------------------ +// simplistic pthread emulation layer + +#include <process.h> + +// _beginthreadex requires __stdcall +#define THREADFN unsigned int __stdcall +#define THREAD_RETURN(val) (unsigned int)((DWORD_PTR)val) + +static int pthread_create(pthread_t* const thread, const void* attr, + unsigned int (__stdcall *start)(void*), void* arg) { + (void)attr; + *thread = (pthread_t)_beginthreadex(NULL, /* void *security */ + 0, /* unsigned stack_size */ + start, + arg, + 0, /* unsigned initflag */ + NULL); /* unsigned *thrdaddr */ + if (*thread == NULL) return 1; + SetThreadPriority(*thread, THREAD_PRIORITY_ABOVE_NORMAL); + return 0; +} + +static int pthread_join(pthread_t thread, void** value_ptr) { + (void)value_ptr; + return (WaitForSingleObject(thread, INFINITE) != WAIT_OBJECT_0 || + CloseHandle(thread) == 0); +} + +// Mutex +static int pthread_mutex_init(pthread_mutex_t* const mutex, void* mutexattr) { + (void)mutexattr; + InitializeCriticalSection(mutex); + return 0; +} + +static int pthread_mutex_lock(pthread_mutex_t* const mutex) { + EnterCriticalSection(mutex); + return 0; +} + +static int pthread_mutex_unlock(pthread_mutex_t* const mutex) { + LeaveCriticalSection(mutex); + return 0; +} + +static int pthread_mutex_destroy(pthread_mutex_t* const mutex) { + DeleteCriticalSection(mutex); + return 0; +} + +// Condition +static int pthread_cond_destroy(pthread_cond_t* const condition) { + int ok = 1; + ok &= (CloseHandle(condition->waiting_sem_) != 0); + ok &= (CloseHandle(condition->received_sem_) != 0); + ok &= (CloseHandle(condition->signal_event_) != 0); + return !ok; +} + +static int pthread_cond_init(pthread_cond_t* const condition, void* cond_attr) { + (void)cond_attr; + condition->waiting_sem_ = CreateSemaphore(NULL, 0, 1, NULL); + condition->received_sem_ = CreateSemaphore(NULL, 0, 1, NULL); + condition->signal_event_ = CreateEvent(NULL, FALSE, FALSE, NULL); + if (condition->waiting_sem_ == NULL || + condition->received_sem_ == NULL || + condition->signal_event_ == NULL) { + pthread_cond_destroy(condition); + return 1; + } + return 0; +} + +static int pthread_cond_signal(pthread_cond_t* const condition) { + int ok = 1; + if (WaitForSingleObject(condition->waiting_sem_, 0) == WAIT_OBJECT_0) { + // a thread is waiting in pthread_cond_wait: allow it to be notified + ok = SetEvent(condition->signal_event_); + // wait until the event is consumed so the signaler cannot consume + // the event via its own pthread_cond_wait. + ok &= (WaitForSingleObject(condition->received_sem_, INFINITE) != + WAIT_OBJECT_0); + } + return !ok; +} + +static int pthread_cond_wait(pthread_cond_t* const condition, + pthread_mutex_t* const mutex) { + int ok; + // note that there is a consumer available so the signal isn't dropped in + // pthread_cond_signal + if (!ReleaseSemaphore(condition->waiting_sem_, 1, NULL)) + return 1; + // now unlock the mutex so pthread_cond_signal may be issued + pthread_mutex_unlock(mutex); + ok = (WaitForSingleObject(condition->signal_event_, INFINITE) == + WAIT_OBJECT_0); + ok &= ReleaseSemaphore(condition->received_sem_, 1, NULL); + pthread_mutex_lock(mutex); + return !ok; +} + +#else // _WIN32 +# define THREADFN void* +# define THREAD_RETURN(val) val +#endif + +//------------------------------------------------------------------------------ + +static THREADFN WebPWorkerThreadLoop(void *ptr) { // thread loop + WebPWorker* const worker = (WebPWorker*)ptr; + int done = 0; + while (!done) { + pthread_mutex_lock(&worker->mutex_); + while (worker->status_ == OK) { // wait in idling mode + pthread_cond_wait(&worker->condition_, &worker->mutex_); + } + if (worker->status_ == WORK) { + if (worker->hook) { + worker->had_error |= !worker->hook(worker->data1, worker->data2); + } + worker->status_ = OK; + } else if (worker->status_ == NOT_OK) { // finish the worker + done = 1; + } + // signal to the main thread that we're done (for Sync()) + pthread_cond_signal(&worker->condition_); + pthread_mutex_unlock(&worker->mutex_); + } + return THREAD_RETURN(NULL); // Thread is finished +} + +// main thread state control +static void WebPWorkerChangeState(WebPWorker* const worker, + WebPWorkerStatus new_status) { + // no-op when attempting to change state on a thread that didn't come up + if (worker->status_ < OK) return; + + pthread_mutex_lock(&worker->mutex_); + // wait for the worker to finish + while (worker->status_ != OK) { + pthread_cond_wait(&worker->condition_, &worker->mutex_); + } + // assign new status and release the working thread if needed + if (new_status != OK) { + worker->status_ = new_status; + pthread_cond_signal(&worker->condition_); + } + pthread_mutex_unlock(&worker->mutex_); +} + +#endif + +//------------------------------------------------------------------------------ + +void WebPWorkerInit(WebPWorker* const worker) { + memset(worker, 0, sizeof(*worker)); + worker->status_ = NOT_OK; +} + +int WebPWorkerSync(WebPWorker* const worker) { +#ifdef WEBP_USE_THREAD + WebPWorkerChangeState(worker, OK); +#endif + assert(worker->status_ <= OK); + return !worker->had_error; +} + +int WebPWorkerReset(WebPWorker* const worker) { + int ok = 1; + worker->had_error = 0; + if (worker->status_ < OK) { +#ifdef WEBP_USE_THREAD + if (pthread_mutex_init(&worker->mutex_, NULL) || + pthread_cond_init(&worker->condition_, NULL)) { + return 0; + } + pthread_mutex_lock(&worker->mutex_); + ok = !pthread_create(&worker->thread_, NULL, WebPWorkerThreadLoop, worker); + if (ok) worker->status_ = OK; + pthread_mutex_unlock(&worker->mutex_); +#else + worker->status_ = OK; +#endif + } else if (worker->status_ > OK) { + ok = WebPWorkerSync(worker); + } + assert(!ok || (worker->status_ == OK)); + return ok; +} + +void WebPWorkerLaunch(WebPWorker* const worker) { +#ifdef WEBP_USE_THREAD + WebPWorkerChangeState(worker, WORK); +#else + if (worker->hook) + worker->had_error |= !worker->hook(worker->data1, worker->data2); +#endif +} + +void WebPWorkerEnd(WebPWorker* const worker) { + if (worker->status_ >= OK) { +#ifdef WEBP_USE_THREAD + WebPWorkerChangeState(worker, NOT_OK); + pthread_join(worker->thread_, NULL); + pthread_mutex_destroy(&worker->mutex_); + pthread_cond_destroy(&worker->condition_); +#else + worker->status_ = NOT_OK; +#endif + } + assert(worker->status_ == NOT_OK); +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/utils/thread.h b/drivers/webpold/utils/thread.h new file mode 100644 index 0000000000..3191890b76 --- /dev/null +++ b/drivers/webpold/utils/thread.h @@ -0,0 +1,86 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Multi-threaded worker +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_UTILS_THREAD_H_ +#define WEBP_UTILS_THREAD_H_ + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if WEBP_USE_THREAD + +#if defined(_WIN32) + +#include <windows.h> +typedef HANDLE pthread_t; +typedef CRITICAL_SECTION pthread_mutex_t; +typedef struct { + HANDLE waiting_sem_; + HANDLE received_sem_; + HANDLE signal_event_; +} pthread_cond_t; + +#else + +#include <pthread.h> + +#endif /* _WIN32 */ +#endif /* WEBP_USE_THREAD */ + +// State of the worker thread object +typedef enum { + NOT_OK = 0, // object is unusable + OK, // ready to work + WORK // busy finishing the current task +} WebPWorkerStatus; + +// Function to be called by the worker thread. Takes two opaque pointers as +// arguments (data1 and data2), and should return false in case of error. +typedef int (*WebPWorkerHook)(void*, void*); + +// Synchronize object used to launch job in the worker thread +typedef struct { +#if WEBP_USE_THREAD + pthread_mutex_t mutex_; + pthread_cond_t condition_; + pthread_t thread_; +#endif + WebPWorkerStatus status_; + WebPWorkerHook hook; // hook to call + void* data1; // first argument passed to 'hook' + void* data2; // second argument passed to 'hook' + int had_error; // return value of the last call to 'hook' +} WebPWorker; + +// Must be called first, before any other method. +void WebPWorkerInit(WebPWorker* const worker); +// Must be called initialize the object and spawn the thread. Re-entrant. +// Will potentially launch the thread. Returns false in case of error. +int WebPWorkerReset(WebPWorker* const worker); +// Make sure the previous work is finished. Returns true if worker->had_error +// was not set and not error condition was triggered by the working thread. +int WebPWorkerSync(WebPWorker* const worker); +// Trigger the thread to call hook() with data1 and data2 argument. These +// hook/data1/data2 can be changed at any time before calling this function, +// but not be changed afterward until the next call to WebPWorkerSync(). +void WebPWorkerLaunch(WebPWorker* const worker); +// Kill the thread and terminate the object. To use the object again, one +// must call WebPWorkerReset() again. +void WebPWorkerEnd(WebPWorker* const worker); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_UTILS_THREAD_H_ */ diff --git a/drivers/webpold/utils/utils.c b/drivers/webpold/utils/utils.c new file mode 100644 index 0000000000..673b7e284c --- /dev/null +++ b/drivers/webpold/utils/utils.c @@ -0,0 +1,44 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Misc. common utility functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> +#include "./utils.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Checked memory allocation + +static int CheckSizeArguments(uint64_t nmemb, size_t size) { + const uint64_t total_size = nmemb * size; + if (nmemb == 0) return 1; + if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0; + if (total_size != (size_t)total_size) return 0; + return 1; +} + +void* WebPSafeMalloc(uint64_t nmemb, size_t size) { + if (!CheckSizeArguments(nmemb, size)) return NULL; + return malloc((size_t)(nmemb * size)); +} + +void* WebPSafeCalloc(uint64_t nmemb, size_t size) { + if (!CheckSizeArguments(nmemb, size)) return NULL; + return calloc((size_t)nmemb, size); +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/drivers/webpold/utils/utils.h b/drivers/webpold/utils/utils.h new file mode 100644 index 0000000000..316ac90612 --- /dev/null +++ b/drivers/webpold/utils/utils.h @@ -0,0 +1,44 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Misc. common utility functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_UTILS_UTILS_H_ +#define WEBP_UTILS_UTILS_H_ + +#include "../types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Memory allocation + +// This is the maximum memory amount that libwebp will ever try to allocate. +#define WEBP_MAX_ALLOCABLE_MEMORY (1ULL << 40) + +// size-checking safe malloc/calloc: verify that the requested size is not too +// large, or return NULL. You don't need to call these for constructs like +// malloc(sizeof(foo)), but only if there's picture-dependent size involved +// somewhere (like: malloc(num_pixels * sizeof(*something))). That's why this +// safe malloc() borrows the signature from calloc(), pointing at the dangerous +// underlying multiply involved. +void* WebPSafeMalloc(uint64_t nmemb, size_t size); +// Note that WebPSafeCalloc() expects the second argument type to be 'size_t' +// in order to favor the "calloc(num_foo, sizeof(foo))" pattern. +void* WebPSafeCalloc(uint64_t nmemb, size_t size); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_UTILS_UTILS_H_ */ |