diff options
Diffstat (limited to 'thirdparty/libwebp')
149 files changed, 58464 insertions, 0 deletions
diff --git a/thirdparty/libwebp/AUTHORS b/thirdparty/libwebp/AUTHORS new file mode 100644 index 0000000000..70423cb4dd --- /dev/null +++ b/thirdparty/libwebp/AUTHORS @@ -0,0 +1,26 @@ +Contributors: +- Charles Munger (clm at google dot com) +- Christian Duvivier (cduvivier at google dot com) +- Djordje Pesut (djordje dot pesut at imgtec dot com) +- James Zern (jzern at google dot com) +- Jan Engelhardt (jengelh at medozas dot de) +- Johann (johann dot koenig at duck dot com) +- Jovan Zelincevic (jovan dot zelincevic at imgtec dot com) +- Jyrki Alakuijala (jyrki at google dot com) +- levytamar82 (tamar dot levy at intel dot com) +- Lou Quillio (louquillio at google dot com) +- Mans Rullgard (mans at mansr dot com) +- Martin Olsson (mnemo at minimum dot se) +- MikoÅ‚aj Zalewski (mikolajz at google dot com) +- Noel Chromium (noel at chromium dot org) +- Pascal Massimino (pascal dot massimino at gmail dot com) +- PaweÅ‚ Hajdan, Jr (phajdan dot jr at chromium dot org) +- Pierre Joye (pierre dot php at gmail dot com) +- Sam Clegg (sbc at chromium dot org) +- Scott LaVarnway (slavarnway at google dot com) +- Scott Talbot (s at chikachow dot org) +- Slobodan Prijic (slobodan dot prijic at imgtec dot com) +- Somnath Banerjee (somnath dot banerjee at gmail dot com) +- Timothy Gu (timothygu99 at gmail dot com) +- Urvang Joshi (urvang at google dot com) +- Vikas Arora (vikasa at google dot com) diff --git a/thirdparty/libwebp/COPYING b/thirdparty/libwebp/COPYING new file mode 100644 index 0000000000..7a6f99547d --- /dev/null +++ b/thirdparty/libwebp/COPYING @@ -0,0 +1,30 @@ +Copyright (c) 2010, Google Inc. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + + * Neither the name of Google nor the names of its contributors may + be used to endorse or promote products derived from this software + without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + diff --git a/thirdparty/libwebp/PATENTS b/thirdparty/libwebp/PATENTS new file mode 100644 index 0000000000..caedf607e9 --- /dev/null +++ b/thirdparty/libwebp/PATENTS @@ -0,0 +1,23 @@ +Additional IP Rights Grant (Patents) +------------------------------------ + +"These implementations" means the copyrightable works that implement the WebM +codecs distributed by Google as part of the WebM Project. + +Google hereby grants to you a perpetual, worldwide, non-exclusive, no-charge, +royalty-free, irrevocable (except as stated in this section) patent license to +make, have made, use, offer to sell, sell, import, transfer, and otherwise +run, modify and propagate the contents of these implementations of WebM, where +such license applies only to those patent claims, both currently owned by +Google and acquired in the future, licensable by Google that are necessarily +infringed by these implementations of WebM. This grant does not include claims +that would be infringed only as a consequence of further modification of these +implementations. If you or your agent or exclusive licensee institute or order +or agree to the institution of patent litigation or any other patent +enforcement activity against any entity (including a cross-claim or +counterclaim in a lawsuit) alleging that any of these implementations of WebM +or any code incorporated within any of these implementations of WebM +constitute direct or contributory patent infringement, or inducement of +patent infringement, then any patent rights granted to you under this License +for these implementations of WebM shall terminate as of the date such +litigation is filed. diff --git a/thirdparty/libwebp/dec/alpha.c b/thirdparty/libwebp/dec/alpha.c new file mode 100644 index 0000000000..028eb3d50b --- /dev/null +++ b/thirdparty/libwebp/dec/alpha.c @@ -0,0 +1,232 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> +#include "./alphai.h" +#include "./vp8i.h" +#include "./vp8li.h" +#include "../dsp/dsp.h" +#include "../utils/quant_levels_dec.h" +#include "../utils/utils.h" +#include "../webp/format_constants.h" + +//------------------------------------------------------------------------------ +// ALPHDecoder object. + +// Allocates a new alpha decoder instance. +static ALPHDecoder* ALPHNew(void) { + ALPHDecoder* const dec = (ALPHDecoder*)WebPSafeCalloc(1ULL, sizeof(*dec)); + return dec; +} + +// Clears and deallocates an alpha decoder instance. +static void ALPHDelete(ALPHDecoder* const dec) { + if (dec != NULL) { + VP8LDelete(dec->vp8l_dec_); + dec->vp8l_dec_ = NULL; + WebPSafeFree(dec); + } +} + +//------------------------------------------------------------------------------ +// 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, const VP8Io* const src_io, + uint8_t* output) { + int ok = 0; + const uint8_t* const alpha_data = data + ALPHA_HEADER_LEN; + const size_t alpha_data_size = data_size - ALPHA_HEADER_LEN; + int rsrv; + VP8Io* const io = &dec->io_; + + assert(data != NULL && output != NULL && src_io != NULL); + + VP8FiltersInit(); + dec->output_ = output; + dec->width_ = src_io->width; + dec->height_ = src_io->height; + assert(dec->width_ > 0 && dec->height_ > 0); + + if (data_size <= ALPHA_HEADER_LEN) { + return 0; + } + + 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 (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; + } + + // Copy the necessary parameters from src_io to io + VP8InitIo(io); + WebPInitCustomIo(NULL, io); + io->opaque = dec; + io->width = src_io->width; + io->height = src_io->height; + + io->use_cropping = src_io->use_cropping; + io->crop_left = src_io->crop_left; + io->crop_right = src_io->crop_right; + io->crop_top = src_io->crop_top; + io->crop_bottom = src_io->crop_bottom; + // No need to copy the scaling parameters. + + if (dec->method_ == ALPHA_NO_COMPRESSION) { + const size_t alpha_decoded_size = dec->width_ * dec->height_; + ok = (alpha_data_size >= alpha_decoded_size); + } else { + assert(dec->method_ == ALPHA_LOSSLESS_COMPRESSION); + ok = VP8LDecodeAlphaHeader(dec, alpha_data, alpha_data_size); + } + + return ok; +} + +// 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->io_.crop_bottom; + if (alph_dec->method_ == ALPHA_NO_COMPRESSION) { + int y; + const uint8_t* prev_line = dec->alpha_prev_line_; + const uint8_t* deltas = dec->alpha_data_ + ALPHA_HEADER_LEN + row * width; + uint8_t* dst = dec->alpha_plane_ + row * width; + assert(deltas <= &dec->alpha_data_[dec->alpha_data_size_]); + if (alph_dec->filter_ != WEBP_FILTER_NONE) { + assert(WebPUnfilters[alph_dec->filter_] != NULL); + for (y = 0; y < num_rows; ++y) { + WebPUnfilters[alph_dec->filter_](prev_line, deltas, dst, width); + prev_line = dst; + dst += width; + deltas += width; + } + } else { + for (y = 0; y < num_rows; ++y) { + memcpy(dst, deltas, width * sizeof(*dst)); + prev_line = dst; + dst += width; + deltas += width; + } + } + dec->alpha_prev_line_ = prev_line; + } else { // alph_dec->method_ == ALPHA_LOSSLESS_COMPRESSION + assert(alph_dec->vp8l_dec_ != NULL); + if (!VP8LDecodeAlphaImageStream(alph_dec, row + num_rows)) { + return 0; + } + } + + if (row + num_rows >= height) { + dec->is_alpha_decoded_ = 1; + } + return 1; +} + +static int AllocateAlphaPlane(VP8Decoder* const dec, const VP8Io* const io) { + const int stride = io->width; + const int height = io->crop_bottom; + const uint64_t alpha_size = (uint64_t)stride * height; + assert(dec->alpha_plane_mem_ == NULL); + dec->alpha_plane_mem_ = + (uint8_t*)WebPSafeMalloc(alpha_size, sizeof(*dec->alpha_plane_)); + if (dec->alpha_plane_mem_ == NULL) { + return 0; + } + dec->alpha_plane_ = dec->alpha_plane_mem_; + dec->alpha_prev_line_ = NULL; + return 1; +} + +void WebPDeallocateAlphaMemory(VP8Decoder* const dec) { + assert(dec != NULL); + WebPSafeFree(dec->alpha_plane_mem_); + dec->alpha_plane_mem_ = NULL; + dec->alpha_plane_ = NULL; + ALPHDelete(dec->alph_dec_); + dec->alph_dec_ = NULL; +} + +//------------------------------------------------------------------------------ +// Main entry point. + +const uint8_t* VP8DecompressAlphaRows(VP8Decoder* const dec, + const VP8Io* const io, + int row, int num_rows) { + const int width = io->width; + const int height = io->crop_bottom; + + assert(dec != NULL && io != NULL); + + if (row < 0 || num_rows <= 0 || row + num_rows > height) { + return NULL; // sanity check. + } + + if (!dec->is_alpha_decoded_) { + if (dec->alph_dec_ == NULL) { // Initialize decoder. + dec->alph_dec_ = ALPHNew(); + if (dec->alph_dec_ == NULL) return NULL; + if (!AllocateAlphaPlane(dec, io)) goto Error; + if (!ALPHInit(dec->alph_dec_, dec->alpha_data_, dec->alpha_data_size_, + io, dec->alpha_plane_)) { + goto Error; + } + // 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 - row; // decode everything in one pass + } + } + + assert(dec->alph_dec_ != NULL); + assert(row + num_rows <= height); + if (!ALPHDecode(dec, row, num_rows)) goto Error; + + if (dec->is_alpha_decoded_) { // finished? + ALPHDelete(dec->alph_dec_); + dec->alph_dec_ = NULL; + if (dec->alpha_dithering_ > 0) { + uint8_t* const alpha = dec->alpha_plane_ + io->crop_top * width + + io->crop_left; + if (!WebPDequantizeLevels(alpha, + io->crop_right - io->crop_left, + io->crop_bottom - io->crop_top, + width, dec->alpha_dithering_)) { + goto Error; + } + } + } + } + + // Return a pointer to the current decoded row. + return dec->alpha_plane_ + row * width; + + Error: + WebPDeallocateAlphaMemory(dec); + return NULL; +} diff --git a/thirdparty/libwebp/dec/alphai.h b/thirdparty/libwebp/dec/alphai.h new file mode 100644 index 0000000000..69dd7c0f5d --- /dev/null +++ b/thirdparty/libwebp/dec/alphai.h @@ -0,0 +1,54 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// 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 decoder: internal header. +// +// Author: Urvang (urvang@google.com) + +#ifndef WEBP_DEC_ALPHAI_H_ +#define WEBP_DEC_ALPHAI_H_ + +#include "./webpi.h" +#include "../utils/filters.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct VP8LDecoder; // Defined in dec/vp8li.h. + +typedef struct ALPHDecoder ALPHDecoder; +struct ALPHDecoder { + int width_; + int height_; + int method_; + WEBP_FILTER_TYPE filter_; + int pre_processing_; + struct VP8LDecoder* vp8l_dec_; + VP8Io io_; + int use_8b_decode_; // Although alpha channel requires only 1 byte per + // pixel, sometimes VP8LDecoder may need to allocate + // 4 bytes per pixel internally during decode. + uint8_t* output_; + const uint8_t* prev_line_; // last output row (or NULL) +}; + +//------------------------------------------------------------------------------ +// internal functions. Not public. + +// Deallocate memory associated to dec->alpha_plane_ decoding +void WebPDeallocateAlphaMemory(VP8Decoder* const dec); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_DEC_ALPHAI_H_ */ diff --git a/thirdparty/libwebp/dec/buffer.c b/thirdparty/libwebp/dec/buffer.c new file mode 100644 index 0000000000..547e69b434 --- /dev/null +++ b/thirdparty/libwebp/dec/buffer.c @@ -0,0 +1,300 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> + +#include "./vp8i.h" +#include "./webpi.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// 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); +} + +// 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; + 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 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 &= (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 &= (a_stride >= width); + ok &= (a_size <= buf->a_size); + ok &= (buf->a != NULL); + } + } else { // RGB checks + const WebPRGBABuffer* const buf = &buffer->u.RGBA; + const int stride = abs(buf->stride); + const uint64_t size = MIN_BUFFER_SIZE(width, height, stride); + ok &= (size <= buf->size); + 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; + 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 <= 0 && 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 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; + } + 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) { + 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 = scaled_width; + h = scaled_height; + } + } + out->width = w; + out->height = h; + + // 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; +} + +//------------------------------------------------------------------------------ +// 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 <= 0) { + WebPSafeFree(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; + } + } +} + +VP8StatusCode WebPCopyDecBufferPixels(const WebPDecBuffer* const src_buf, + WebPDecBuffer* const dst_buf) { + assert(src_buf != NULL && dst_buf != NULL); + assert(src_buf->colorspace == dst_buf->colorspace); + + dst_buf->width = src_buf->width; + dst_buf->height = src_buf->height; + if (CheckDecBuffer(dst_buf) != VP8_STATUS_OK) { + return VP8_STATUS_INVALID_PARAM; + } + if (WebPIsRGBMode(src_buf->colorspace)) { + const WebPRGBABuffer* const src = &src_buf->u.RGBA; + const WebPRGBABuffer* const dst = &dst_buf->u.RGBA; + WebPCopyPlane(src->rgba, src->stride, dst->rgba, dst->stride, + src_buf->width * kModeBpp[src_buf->colorspace], + src_buf->height); + } else { + const WebPYUVABuffer* const src = &src_buf->u.YUVA; + const WebPYUVABuffer* const dst = &dst_buf->u.YUVA; + WebPCopyPlane(src->y, src->y_stride, dst->y, dst->y_stride, + src_buf->width, src_buf->height); + WebPCopyPlane(src->u, src->u_stride, dst->u, dst->u_stride, + (src_buf->width + 1) / 2, (src_buf->height + 1) / 2); + WebPCopyPlane(src->v, src->v_stride, dst->v, dst->v_stride, + (src_buf->width + 1) / 2, (src_buf->height + 1) / 2); + if (WebPIsAlphaMode(src_buf->colorspace)) { + WebPCopyPlane(src->a, src->a_stride, dst->a, dst->a_stride, + src_buf->width, src_buf->height); + } + } + return VP8_STATUS_OK; +} + +int WebPAvoidSlowMemory(const WebPDecBuffer* const output, + const WebPBitstreamFeatures* const features) { + assert(output != NULL); + return (output->is_external_memory >= 2) && + WebPIsPremultipliedMode(output->colorspace) && + (features != NULL && features->has_alpha); +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dec/common.h b/thirdparty/libwebp/dec/common.h new file mode 100644 index 0000000000..6961e22470 --- /dev/null +++ b/thirdparty/libwebp/dec/common.h @@ -0,0 +1,54 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Definitions and macros common to encoding and decoding +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_DEC_COMMON_H_ +#define WEBP_DEC_COMMON_H_ + +// 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, + B_PRED = NUM_BMODES, // refined I4x4 mode + NUM_PRED_MODES = 4, + + // 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, // 0: i16-AC, 1: i16-DC, 2:chroma-AC, 3:i4-AC + NUM_BANDS = 8, + NUM_CTX = 3, + NUM_PROBAS = 11 + }; + +#endif // WEBP_DEC_COMMON_H_ diff --git a/thirdparty/libwebp/dec/decode_vp8.h b/thirdparty/libwebp/dec/decode_vp8.h new file mode 100644 index 0000000000..b9337bbec0 --- /dev/null +++ b/thirdparty/libwebp/dec/decode_vp8.h @@ -0,0 +1,185 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_WEBP_DECODE_VP8_H_ +#define WEBP_WEBP_DECODE_VP8_H_ + +#include "../webp/decode.h" + +#ifdef __cplusplus +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); +} + +// 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. +// 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); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_WEBP_DECODE_VP8_H_ */ diff --git a/thirdparty/libwebp/dec/frame.c b/thirdparty/libwebp/dec/frame.c new file mode 100644 index 0000000000..22d291d2cd --- /dev/null +++ b/thirdparty/libwebp/dec/frame.c @@ -0,0 +1,812 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> +#include "./vp8i.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// 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; +} + +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 + +// 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 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_; + 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 = 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); + } + 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_ + 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); + } + 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); + } +} + +//------------------------------------------------------------------------------ +// Precompute the filtering strength for each segment and each i4x4/i16x16 mode. + +static void PrecomputeFilterStrengths(VP8Decoder* const dec) { + if (dec->filter_type_ > 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; + } + } + } +} + +//------------------------------------------------------------------------------ +// Dithering + +// minimal amp that will provide a non-zero dithering effect +#define MIN_DITHER_AMP 4 + +#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 (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; + } + } +} + +// Convert to range: [-2,2] for dither=50, [-4,4] for dither=100 +static void Dither8x8(VP8Random* const rg, uint8_t* dst, int bps, int amp) { + uint8_t dither[64]; + int i; + for (i = 0; i < 8 * 8; ++i) { + dither[i] = VP8RandomBits2(rg, VP8_DITHER_AMP_BITS + 1, amp); + } + VP8DitherCombine8x8(dither, dst, bps); +} + +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_); + } + } +} + +//------------------------------------------------------------------------------ +// 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 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 = 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 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 (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; + 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 (!is_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): testing presence of alpha with dec->alpha_data_ is not a + // good idea. + io->a = VP8DecompressAlphaRows(dec, io, 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 (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); + } + } + + return ok; +} + +#undef MACROBLOCK_VPOS + +//------------------------------------------------------------------------------ + +int VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io) { + int ok = 1; + VP8ThreadContext* const ctx = &dec->thread_ctx_; + 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_ = filter_row; + ReconstructRow(dec, ctx); + ok = FinishRow(dec, io); + } else { + WebPWorker* const worker = &dec->worker_; + // Finish previous job *before* updating context + 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_ = 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; + } + // (reconstruct)+filter in parallel + WebPGetWorkerInterface()->Launch(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() no matter what. + if (io->setup != NULL && !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 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_; + } + } + PrecomputeFilterStrengths(dec); + return VP8_STATUS_OK; +} + +int VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io) { + int ok = 1; + if (dec->mt_method_ > 0) { + ok = WebPGetWorkerInterface()->Sync(&dec->worker_); + } + + if (io->teardown != NULL) { + 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->mt_method_ > 0) { + WebPWorker* const worker = &dec->worker_; + if (!WebPGetWorkerInterface()->Reset(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; +} + +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 + +//------------------------------------------------------------------------------ +// 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 = 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->mt_method_ > 0 ? 2 : 1) * sizeof(VP8FInfo) + : 0; + const size_t yuv_size = YUV_SIZE * sizeof(*dec->yuv_b_); + 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; + // 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 + 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_) { + WebPSafeFree(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->yuv_t_ = (VP8TopSamples*)mem; + mem += top_size; + + 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->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*)WEBP_ALIGN(mem); + assert((yuv_size & WEBP_ALIGN_CST) == 0); + dec->yuv_b_ = (uint8_t*)mem; + mem += yuv_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; + { + 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; + assert(mem <= (uint8_t*)dec->mem_ + dec->mem_size_); + + // 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); + + 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* const 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; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dec/idec.c b/thirdparty/libwebp/dec/idec.c new file mode 100644 index 0000000000..8de131916e --- /dev/null +++ b/thirdparty/libwebp/dec/idec.c @@ -0,0 +1,892 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: somnath@google.com (Somnath Banerjee) + +#include <assert.h> +#include <string.h> +#include <stdlib.h> + +#include "./alphai.h" +#include "./webpi.h" +#include "./vp8i.h" +#include "../utils/utils.h" + +// 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 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_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, + 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, + // or if the external one has slow-memory) + WebPDecBuffer* final_output_; // Slow-memory output to copy to eventually. + 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_; + VP8BitReader token_br_; +} MBContext; + +//------------------------------------------------------------------------------ +// MemBuffer: incoming data handling + +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_; + // 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 uint32_t last_part = dec->num_parts_minus_one_; + if (offset != 0) { + uint32_t p; + for (p = 0; p <= last_part; ++p) { + 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) { + VP8RemapBitReader(&dec->br_, offset); + } + } + { + const uint8_t* const last_start = dec->parts_[last_part].buf_; + 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. + } + } + } + } 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) { + VP8Decoder* const dec = (VP8Decoder*)idec->dec_; + MemBuffer* const mem = &idec->mem_; + 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 + // 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 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); + WebPSafeFree(mem->buf_); + mem->buf_ = new_buf; + mem->buf_size_ = (size_t)extra_size; + mem->start_ = new_mem_start; + 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_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_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! + + mem->buf_ = (uint8_t*)data; + mem->end_ = mem->buf_size_ = data_size; + + DoRemap(idec, mem->buf_ + mem->start_ - old_start); + 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) { + WebPSafeFree(mem->buf_); + WebPSafeFree((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; +} + +// 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) { + const VP8StatusCode status = WebPFlipBuffer(output); + if (status != VP8_STATUS_OK) return status; + } + if (idec->final_output_ != NULL) { + WebPCopyDecBufferPixels(output, idec->final_output_); // do the slow-copy + WebPFreeDecBuffer(&idec->output_); + *output = *idec->final_output_; + idec->final_output_ = NULL; + } + return VP8_STATUS_OK; +} + +//------------------------------------------------------------------------------ +// Macroblock-decoding contexts + +static void SaveContext(const VP8Decoder* dec, const VP8BitReader* token_br, + MBContext* const context) { + context->left_ = dec->mb_info_[-1]; + context->info_ = dec->mb_info_[dec->mb_x_]; + context->token_br_ = *token_br; +} + +static void RestoreContext(const MBContext* context, VP8Decoder* const dec, + VP8BitReader* const token_br) { + dec->mb_info_[-1] = context->left_; + dec->mb_info_[dec->mb_x_] = context->info_; + *token_br = context->token_br_; +} + +//------------------------------------------------------------------------------ + +static VP8StatusCode IDecError(WebPIDecoder* const idec, VP8StatusCode error) { + if (idec->state_ == STATE_VP8_DATA) { + VP8Io* const io = &idec->io_; + if (io->teardown != NULL) { + 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; + 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. + } 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; + dec->alpha_data_ = headers.alpha_data; + dec->alpha_data_size_ = headers.alpha_data_size; + ChangeState(idec, STATE_VP8_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_); + 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_, &width, &height)) { + 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 VP8StatusCode CopyParts0Data(WebPIDecoder* const idec) { + VP8Decoder* const dec = (VP8Decoder*)idec->dec_; + VP8BitReader* const br = &dec->br_; + const size_t part_size = br->buf_end_ - br->buf_; + MemBuffer* const mem = &idec->mem_; + assert(!idec->is_lossless_); + assert(mem->part0_buf_ == NULL); + // 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*)WebPSafeMalloc(1ULL, part_size); + if (part0_buf == NULL) { + return VP8_STATUS_OUT_OF_MEMORY; + } + memcpy(part0_buf, br->buf_, part_size); + mem->part0_buf_ = part0_buf; + VP8BitReaderSetBuffer(br, part0_buf, part_size); + } else { + // Else: just keep pointers to the partition #0's data in dec_->br_. + } + mem->start_ += part_size; + return VP8_STATUS_OK; +} + +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_); + } + // This change must be done before calling VP8InitFrame() + dec->mt_method_ = VP8GetThreadMethod(params->options, NULL, + io->width, io->height); + VP8InitDithering(params->options, dec); + + 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(). + 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_) { + 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_) { + VP8BitReader* const token_br = + &dec->parts_[dec->mb_y_ & dec->num_parts_minus_one_]; + MBContext context; + SaveContext(dec, token_br, &context); + if (!VP8DecodeMB(dec, token_br)) { + // We shouldn't fail when MAX_MB data was available + if (dec->num_parts_minus_one_ == 0 && + MemDataSize(&idec->mem_) > MAX_MB_SIZE) { + return IDecError(idec, VP8_STATUS_BITSTREAM_ERROR); + } + RestoreContext(&context, dec, token_br); + return VP8_STATUS_SUSPENDED; + } + // Release buffer only if there is only one partition + if (dec->num_parts_minus_one_ == 0) { + 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); + } + } + // Synchronize the thread and check for errors. + if (!VP8ExitCritical(dec, io)) { + return IDecError(idec, VP8_STATUS_USER_ABORT); + } + dec->ready_ = 0; + return FinishDecoding(idec); +} + +static VP8StatusCode 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)) { + 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. + 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_); + + // 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_); + } + 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_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_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; +} + +//------------------------------------------------------------------------------ +// Internal constructor + +static WebPIDecoder* NewDecoder(WebPDecBuffer* const output_buffer, + const WebPBitstreamFeatures* const features) { + WebPIDecoder* idec = (WebPIDecoder*)WebPSafeCalloc(1ULL, sizeof(*idec)); + if (idec == NULL) { + return NULL; + } + + 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_); + if (output_buffer == NULL || WebPAvoidSlowMemory(output_buffer, features)) { + idec->params_.output = &idec->output_; + idec->final_output_ = output_buffer; + if (output_buffer != NULL) { + idec->params_.output->colorspace = output_buffer->colorspace; + } + } else { + idec->params_.output = output_buffer; + idec->final_output_ = NULL; + } + WebPInitCustomIo(&idec->params_, &idec->io_); // Plug the I/O functions. + + return idec; +} + +//------------------------------------------------------------------------------ +// Public functions + +WebPIDecoder* WebPINewDecoder(WebPDecBuffer* output_buffer) { + return NewDecoder(output_buffer, NULL); +} + +WebPIDecoder* WebPIDecode(const uint8_t* data, size_t data_size, + WebPDecoderConfig* config) { + WebPIDecoder* idec; + WebPBitstreamFeatures tmp_features; + WebPBitstreamFeatures* const features = + (config == NULL) ? &tmp_features : &config->input; + memset(&tmp_features, 0, sizeof(tmp_features)); + + // Parse the bitstream's features, if requested: + if (data != NULL && data_size > 0) { + if (WebPGetFeatures(data, data_size, features) != VP8_STATUS_OK) { + return NULL; + } + } + + // Create an instance of the incremental decoder + idec = (config != NULL) ? NewDecoder(&config->output, features) + : NewDecoder(NULL, features); + 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_) { + 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((VP8LDecoder*)idec->dec_); + } + } + ClearMemBuffer(&idec->mem_); + WebPFreeDecBuffer(&idec->output_); + WebPSafeFree(idec); +} + +//------------------------------------------------------------------------------ +// Wrapper toward WebPINewDecoder + +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) ? 1 : 0; + WebPIDecoder* idec; + + if (mode >= MODE_YUV) return NULL; + if (is_external_memory == 0) { // 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 = 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; + 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) { + const int is_external_memory = (luma != NULL) ? 1 : 0; + WebPIDecoder* idec; + WEBP_CSP_MODE colorspace; + + if (is_external_memory == 0) { // 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 = 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; + 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; + } + if (idec->final_output_ != NULL) { + return NULL; // not yet slow-copied + } + 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; + if (src != NULL) { + 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_WEBP_HEADER) { + return 0; + } + + idec->io_.put = put; + idec->io_.setup = setup; + idec->io_.teardown = teardown; + idec->io_.opaque = user_data; + + return 1; +} diff --git a/thirdparty/libwebp/dec/io.c b/thirdparty/libwebp/dec/io.c new file mode 100644 index 0000000000..8d5c43f325 --- /dev/null +++ b/thirdparty/libwebp/dec/io.c @@ -0,0 +1,624 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// 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" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// 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* 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; +} + +//------------------------------------------------------------------------------ +// 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(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, + 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 void FillAlphaPlane(uint8_t* dst, int w, int h, int stride) { + int j; + for (j = 0; j < h; ++j) { + memset(dst, 0xff, w * sizeof(*dst)); + dst += stride; + } +} + +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)); + alpha += io->width; + dst += buf->a_stride; + } + } else if (buf->a != NULL) { + // the user requested alpha, but there is none, set it to opaque. + FillAlphaPlane(dst, mb_w, mb_h, 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, + int expected_num_lines_out) { + 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* 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); + } + } + return 0; +} + +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; + 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; +#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). + 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; + } + (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); + } + } + 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; + 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, + int expected_num_lines_out) { + const WebPYUVABuffer* const buf = &p->output->u.YUVA; + if (io->a != NULL) { + 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); + } + } else if (buf->a != NULL) { + // the user requested alpha, but there is none, set it to opaque. + assert(p->last_y + expected_num_lines_out <= io->scaled_height); + FillAlphaPlane(buf->a + p->last_y * buf->a_stride, + io->scaled_width, expected_num_lines_out, buf->a_stride); + } + 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; + rescaler_t* work; + + tmp_size = (work_size + 2 * uv_work_size) * sizeof(*work); + if (has_alpha) { + tmp_size += work_size * sizeof(*work); + } + p->memory = WebPSafeMalloc(1ULL, tmp_size); + if (p->memory == NULL) { + return 0; // memory error + } + 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, + work); + WebPRescalerInit(&p->scaler_u, uv_in_width, uv_in_height, + buf->u, uv_out_width, uv_out_height, buf->u_stride, 1, + 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, + 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, + work + work_size + 2 * uv_work_size); + p->emit_alpha = EmitRescaledAlphaYUV; + WebPInitAlphaProcessing(); + } + 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 + 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(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); + j += y_lines_in; + 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, int max_lines_out) { + const WebPRGBABuffer* const buf = &p->output->u.RGBA; + 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 non_opaque = 0; + const int width = p->scaler_a.dst_width; + + while (WebPRescalerHasPendingOutput(&p->scaler_a) && + num_lines_out < max_lines_out) { + assert(y_pos + num_lines_out < p->output->height); + WebPRescalerExportRow(&p->scaler_a); + non_opaque |= WebPDispatchAlpha(p->scaler_a.dst, 0, width, 1, dst, 0); + dst += buf->stride; + ++num_lines_out; + } + 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, + int max_lines_out) { + const WebPRGBABuffer* const buf = &p->output->u.RGBA; + 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) && + num_lines_out < max_lines_out) { + int i; + 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). + 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, + int expected_num_out_lines) { + if (io->a != NULL) { + WebPRescaler* const scaler = &p->scaler_a; + 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; +} + +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 + rescaler_t* work; // rescalers work area + uint8_t* tmp; // tmp storage for scaled YUV444 samples before RGB conversion + size_t tmp_size1, tmp_size2, total_size; + + tmp_size1 = 3 * work_size; + tmp_size2 = 3 * out_width; + if (has_alpha) { + tmp_size1 += work_size; + tmp_size2 += out_width; + } + 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 = (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, + work + 0 * work_size); + WebPRescalerInit(&p->scaler_u, uv_in_width, uv_in_height, + tmp + 1 * out_width, out_width, out_height, 0, 1, + work + 1 * work_size); + WebPRescalerInit(&p->scaler_v, uv_in_width, uv_in_height, + tmp + 2 * out_width, out_width, out_height, 0, 1, + 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, + 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; + } + WebPInitAlphaProcessing(); + } + 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 (is_alpha && WebPIsPremultipliedMode(colorspace)) { + WebPInitUpsamplers(); + } + 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) { + WebPInitSamplers(); + p->emit = EmitSampledRGB; // default + if (io->fancy_upsampling) { +#ifdef FANCY_UPSAMPLING + const int uv_width = (io->mb_w + 1) >> 1; + p->memory = WebPSafeMalloc(1ULL, (size_t)(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 + p->emit_alpha = + (colorspace == MODE_RGBA_4444 || colorspace == MODE_rgbA_4444) ? + EmitAlphaRGBA4444 + : is_rgb ? EmitAlphaRGB + : EmitAlphaYUV; + if (is_rgb) { + WebPInitAlphaProcessing(); + } + } + } + + 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 != NULL) { + p->emit_alpha(io, p, num_lines_out); + } + p->last_y += num_lines_out; + return 1; +} + +//------------------------------------------------------------------------------ + +static void CustomTeardown(const VP8Io* io) { + WebPDecParams* const p = (WebPDecParams*)io->opaque; + WebPSafeFree(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; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dec/quant.c b/thirdparty/libwebp/dec/quant.c new file mode 100644 index 0000000000..5b648f942c --- /dev/null +++ b/thirdparty/libwebp/dec/quant.c @@ -0,0 +1,110 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./vp8i.h" + +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)]; + + m->uv_quant_ = q + dquv_ac; // for dithering strength evaluation + } + } +} + +//------------------------------------------------------------------------------ + diff --git a/thirdparty/libwebp/dec/tree.c b/thirdparty/libwebp/dec/tree.c new file mode 100644 index 0000000000..c2007ea733 --- /dev/null +++ b/thirdparty/libwebp/dec/tree.c @@ -0,0 +1,525 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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 "../utils/bit_reader_inl.h" + +#define USE_GENERIC_TREE + +#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 + +//------------------------------------------------------------------------------ +// Default probabilities + +// Paragraph 13.5 +static const uint8_t + CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { + { { { 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_)); + // proba->bands_[][] is initialized later +} + +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_; + 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); + block->imodes_[0] = ymode; + memset(top, ymode, 4 * sizeof(*top)); + memset(left, ymode, 4 * sizeof(*left)); + } else { + uint8_t* modes = block->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 = kYModesIntra4[VP8GetBit(br, prob[0])]; + while (i > 0) { + i = kYModesIntra4[2 * i + VP8GetBit(br, prob[i])]; + } + 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; + } + memcpy(modes, top, 4 * sizeof(*top)); + modes += 4; + left[y] = ymode; + } + } + // Hardcoded UVMode decision tree + 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_; +} + +//------------------------------------------------------------------------------ +// 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 } + } + } +}; + +// 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 +}; + +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) { + 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); + } +} + diff --git a/thirdparty/libwebp/dec/vp8.c b/thirdparty/libwebp/dec/vp8.c new file mode 100644 index 0000000000..336680c38c --- /dev/null +++ b/thirdparty/libwebp/dec/vp8.c @@ -0,0 +1,667 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> + +#include "./alphai.h" +#include "./vp8i.h" +#include "./vp8li.h" +#include "./webpi.h" +#include "../utils/bit_reader_inl.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ + +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*)WebPSafeCalloc(1ULL, sizeof(*dec)); + if (dec != NULL) { + SetOk(dec); + WebPGetWorkerInterface()->Init(&dec->worker_); + dec->ready_ = 0; + dec->num_parts_minus_one_ = 0; + } + 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); + WebPSafeFree(dec); + } +} + +int VP8SetError(VP8Decoder* const dec, + VP8StatusCode error, const char* const msg) { + // The oldest error reported takes precedence over the new one. + 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 (w == 0 || h == 0) { + return 0; // We don't support both width and height to be zero. + } + + 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; + size_t size_left = size; + size_t last_part; + size_t p; + + dec->num_parts_minus_one_ = (1 << VP8GetValue(br, 2)) - 1; + last_part = dec->num_parts_minus_one_; + 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) { + 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, size_left); + 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; + 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; + + if (dec == NULL) { + return 0; + } + SetOk(dec); + if (io == NULL) { + return VP8SetError(dec, VP8_STATUS_INVALID_PARAM, + "null VP8Io passed to VP8GetHeaders()"); + } + buf = io->data; + buf_size = io->data_size; + 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_; + // IMPORTANT! use some sane dimensions in crop_* and scaled_* fields. + // So they can be used interchangeably without always testing for + // 'use_cropping'. + io->use_cropping = 0; + io->crop_top = 0; + io->crop_left = 0; + io->crop_right = io->width; + io->crop_bottom = io->height; + io->use_scaling = 0; + io->scaled_width = io->width; + io->scaled_height = io->height; + + io->mb_w = io->width; // sanity check + io->mb_h = io->height; // ditto + + VP8ResetProba(&dec->proba_); + ResetSegmentHeader(&dec->segment_hdr_); + } + + // 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, 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_) { + return VP8SetError(dec, VP8_STATUS_UNSUPPORTED_FEATURE, + "Not a key frame."); + } + + VP8Get(br); // ignore the value of update_proba_ + + VP8ParseProba(br, dec); + + // sanitized state + dec->ready_ = 1; + return 1; +} + +//------------------------------------------------------------------------------ +// Residual decoding (Paragraph 13.2 / 13.3) + +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 +}; + +// 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 +static int GetCoeffs(VP8BitReader* const br, const VP8BandProbas* const prob[], + int ctx, const quant_t dq, int n, int16_t* out) { + 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])) { + v = 1; + p = p_ctx[1]; + } else { + v = GetLargeValue(br, p); + p = p_ctx[2]; + } + out[kZigzag[n]] = VP8GetSigned(br, v) * dq[n > 0]; + } + } + return 16; +} + +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; + 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; + + memset(dst, 0, 384 * sizeof(*dst)); + if (!block->is_i4x4_) { // parse DC + int16_t dc[16] = { 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_proba = bands[0]; + } else { + first = 0; + ac_proba = bands[3]; + } + + tnz = mb->nz_ & 0x0f; + lnz = left_mb->nz_ & 0x0f; + for (y = 0; y < 4; ++y) { + int l = lnz & 1; + uint32_t nz_coeffs = 0; + for (x = 0; x < 4; ++x) { + 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; + } + tnz >>= 4; + lnz = (lnz >> 1) | (l << 7); + non_zero_y = (non_zero_y << 8) | nz_coeffs; + } + out_t_nz = tnz; + out_l_nz = lnz >> 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 & 1; + for (x = 0; x < 2; ++x) { + 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; + } + tnz >>= 2; + lnz = (lnz >> 1) | (l << 5); + } + // 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; + } + mb->nz_ = out_t_nz; + left_mb->nz_ = out_l_nz; + + 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 +} + +//------------------------------------------------------------------------------ +// Main loop + +int VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br) { + VP8MB* const left = dec->mb_info_ - 1; + 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; + + if (!skip) { + skip = ParseResiduals(dec, mb, token_br); + } else { + left->nz_ = mb->nz_ = 0; + if (!block->is_i4x4_) { + left->nz_dc_ = mb->nz_dc_ = 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_; +} + +void VP8InitScanline(VP8Decoder* const dec) { + VP8MB* const left = dec->mb_info_ - 1; + left->nz_ = 0; + left->nz_dc_ = 0; + memset(dec->intra_l_, B_DC_PRED, sizeof(dec->intra_l_)); + 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_minus_one_]; + 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."); + } + } + 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->mt_method_ > 0) { + if (!WebPGetWorkerInterface()->Sync(&dec->worker_)) return 0; + } + + 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; + } + WebPGetWorkerInterface()->End(&dec->worker_); + WebPDeallocateAlphaMemory(dec); + WebPSafeFree(dec->mem_); + dec->mem_ = NULL; + dec->mem_size_ = 0; + memset(&dec->br_, 0, sizeof(dec->br_)); + dec->ready_ = 0; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dec/vp8i.h b/thirdparty/libwebp/dec/vp8i.h new file mode 100644 index 0000000000..00da02badc --- /dev/null +++ b/thirdparty/libwebp/dec/vp8i.h @@ -0,0 +1,320 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_DEC_VP8I_H_ +#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" + +#ifdef __cplusplus +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Various defines and enums + +// version numbers +#define DEC_MAJ_VERSION 0 +#define DEC_MIN_VERSION 5 +#define DEC_REV_VERSION 1 + +// 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 +// 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 +#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 + +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; + +// 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 + VP8BandProbas bands_[NUM_TYPES][NUM_BANDS]; + const VP8BandProbas* bands_ptr_[NUM_TYPES][16 + 1]; +} 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 + 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 { // 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 (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 + +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 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 + + // 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 minus one. + uint32_t num_parts_minus_one_; + // per-partition boolean decoders. + VP8BitReader parts_[MAX_NUM_PARTITIONS]; + + // 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]; + + // probabilities + VP8Proba proba_; + int use_skip_proba_; + uint8_t skip_p_; + + // 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 + + VP8TopSamples* yuv_t_; // top y/u/v 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_; + 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 + VP8MBData* mb_data_; // parsed reconstruction data + + // Filtering side-info + int filter_type_; // 0=off, 1=simple, 2=complex + VP8FInfo fstrengths_[NUM_MB_SEGMENTS][2]; // precalculated per-segment/type + + // Alpha + struct ALPHDecoder* alph_dec_; // alpha-plane decoder object + const uint8_t* alpha_data_; // compressed alpha data (if present) + size_t alpha_data_size_; + int is_alpha_decoded_; // true if alpha_data_ is decoded in alpha_plane_ + uint8_t* alpha_plane_mem_; // memory allocated for alpha_plane_ + uint8_t* alpha_plane_; // output. Persistent, contains the whole data. + const uint8_t* alpha_prev_line_; // last decoded alpha row (or NULL) + int alpha_dithering_; // derived from decoding options (0=off, 100=full) +}; + +//------------------------------------------------------------------------------ +// 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); +// 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* 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 +// 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); +// 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); +// 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, + const VP8Io* const io, + int row, int num_rows); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_DEC_VP8I_H_ */ diff --git a/thirdparty/libwebp/dec/vp8l.c b/thirdparty/libwebp/dec/vp8l.c new file mode 100644 index 0000000000..cb2e3176b6 --- /dev/null +++ b/thirdparty/libwebp/dec/vp8l.c @@ -0,0 +1,1660 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 +// +// Authors: Vikas Arora (vikaas.arora@gmail.com) +// Jyrki Alakuijala (jyrki@google.com) + +#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" + +#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 +}; + +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] = { + 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 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, + int is_level0, + VP8LDecoder* const dec, + uint32_t** const decoded_data); + +//------------------------------------------------------------------------------ + +int VP8LCheckSignature(const uint8_t* const data, size_t size) { + 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) { + 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); + 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; + 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 = 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; // 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 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; +} + +// 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 { + 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; + } + } +} + +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; + HuffmanCode table[1 << LENGTHS_TABLE_BITS]; + + 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) { + goto End; + } + } else { + max_symbol = num_symbols; + } + + symbol = 0; + while (symbol < num_symbols) { + const HuffmanCode* p; + int code_len; + if (max_symbol-- == 0) break; + VP8LFillBitWindow(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; + } 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) { + goto End; + } else { + const int length = use_prev ? prev_code_len : 0; + while (repeat-- > 0) code_lengths[symbol++] = length; + } + } + } + ok = 1; + + End: + 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, + 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. + 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. + 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) { + symbol = VP8LReadBits(br, 8); + code_lengths[symbol] = 1; + } + ok = 1; + } else { // Decode Huffman-coded code lengths. + 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; + } + + 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); + } + + 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 size; +} + +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; + 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. + 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)) { + 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 group = (huffman_image[i] >> 8) & 0xffff; + huffman_image[i] = group; + if (group >= num_htree_groups) { + num_htree_groups = group + 1; + } + } + } + + 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)); + + 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) { + 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; + } + size = ReadHuffmanCode(alphabet_size, dec, code_lengths, next); + if (size == 0) { + goto Error; + } + if (is_trivial_literal && kLiteralMap[j] == 1) { + is_trivial_literal = (next->bits == 0); + } + total_size += next->bits; + next += size; + 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: + WebPSafeFree(code_lengths); + WebPSafeFree(huffman_image); + WebPSafeFree(huffman_tables); + VP8LHtreeGroupsFree(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; + 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*)WebPSafeMalloc(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 = (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, 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) { + 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; + } + return num_lines_out; +} + +// Emit scaled rows. +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; + int num_lines_in = 0; + int num_lines_out = 0; + while (num_lines_in < mb_h) { + uint8_t* const row_in = in + num_lines_in * in_stride; + uint8_t* const row_out = out + num_lines_out * out_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; +} + +// Emit rows without any scaling. +static int EmitRows(WEBP_CSP_MODE colorspace, + 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; + 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 + 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; + // 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) { + uint8_t* const a = buf->a + y_pos * buf->a_stride; +#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; + 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; + } + return num_lines_out; +} + +static int EmitRescaledRowsYUVA(const VP8LDecoder* const dec, + 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 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 uint8_t* in, int in_stride, + int mb_w, int num_rows) { + int y_pos = dec->last_out_row_; + while (num_rows-- > 0) { + ConvertToYUVA((const uint32_t*)in, mb_w, y_pos, dec->output_); + 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 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, + 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) { + 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 += delta * pixel_stride; + } + if (y_start >= y_end) return 0; // Crop window is empty. + + *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; + 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->pixels_ + dec->width_ * dec->last_row_; + const int num_rows = row - dec->last_row_; + + assert(row <= dec->io_->crop_bottom); + // We can't process more than NUM_ARGB_CACHE_ROWS at a time (that's the size + // of argb_cache_), but we currently don't need more than that. + assert(num_rows <= NUM_ARGB_CACHE_ROWS); + if (num_rows > 0) { // Emit output. + VP8Io* const io = dec->io_; + uint8_t* rows_data = (uint8_t*)dec->argb_cache_; + const int in_stride = io->width * sizeof(uint32_t); // in unit of RGBA + + ApplyInverseTransforms(dec, num_rows, rows); + if (!SetCropWindow(io, dec->last_row_, row, &rows_data, in_stride)) { + // Nothing to output (this time). + } else { + const WebPDecBuffer* const output = dec->output_; + 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 ? + 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_'. + 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_); +} + +// 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 AlphaApplyFilter(ALPHDecoder* const alph_dec, + int first_row, int last_row, + uint8_t* out, int stride) { + if (alph_dec->filter_ != WEBP_FILTER_NONE) { + int y; + const uint8_t* prev_line = alph_dec->prev_line_; + assert(WebPUnfilters[alph_dec->filter_] != NULL); + for (y = first_row; y < last_row; ++y) { + WebPUnfilters[alph_dec->filter_](prev_line, out, out, stride); + prev_line = out; + out += stride; + } + alph_dec->prev_line_ = prev_line; + } +} + +static void ExtractPalettedAlphaRows(VP8LDecoder* const dec, int last_row) { + // For vertical and gradient filtering, we need to decode the part above the + // crop_top row, in order to have the correct spatial predictors. + ALPHDecoder* const alph_dec = (ALPHDecoder*)dec->io_->opaque; + const int top_row = + (alph_dec->filter_ == WEBP_FILTER_NONE || + alph_dec->filter_ == WEBP_FILTER_HORIZONTAL) ? dec->io_->crop_top + : dec->last_row_; + const int first_row = (dec->last_row_ < top_row) ? top_row : dec->last_row_; + assert(last_row <= dec->io_->crop_bottom); + if (last_row > first_row) { + // Special method for paletted alpha data. We only process the cropped area. + const int width = dec->io_->width; + uint8_t* out = alph_dec->output_ + width * first_row; + const uint8_t* const in = + (uint8_t*)dec->pixels_ + dec->width_ * first_row; + VP8LTransform* const transform = &dec->transforms_[0]; + assert(dec->next_transform_ == 1); + assert(transform->type_ == COLOR_INDEXING_TRANSFORM); + VP8LColorIndexInverseTransformAlpha(transform, first_row, last_row, + in, out); + AlphaApplyFilter(alph_dec, first_row, last_row, out, width); + } + dec->last_row_ = dec->last_out_row_ = last_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 row = dec->last_pixel_ / width; + int col = dec->last_pixel_ % width; + VP8LBitReader* const br = &dec->br_; + VP8LMetadata* const hdr = &dec->hdr_; + 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 mask = hdr->huffman_mask_; + const HTreeGroup* htree_group = + (pos < last) ? GetHtreeGroupForPos(hdr, col, row) : NULL; + assert(pos <= end); + assert(last_row <= height); + assert(Is8bOptimizable(hdr)); + + while (!br->eos_ && pos < last) { + int code; + // Only update when changing tile. + if ((col & mask) == 0) { + htree_group = GetHtreeGroupForPos(hdr, col, row); + } + assert(htree_group != NULL); + VP8LFillBitWindow(br); + 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 <= last_row && (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); + 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 <= last_row && (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 > last_row ? last_row : 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_; + 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_; + const HTreeGroup* htree_group = + (src < src_last) ? GetHtreeGroupForPos(hdr, col, row) : NULL; + assert(dec->last_row_ < last_row); + 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); + } + assert(htree_group != NULL); + 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) { + if (row <= last_row && (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 (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) { + if (row <= last_row && (row % NUM_ARGB_CACHE_ROWS == 0)) { + process_func(dec, row); + } + } + } + // 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 + 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 + goto Error; + } + assert(br->eos_ == VP8LIsEndOfStream(br)); + } + + 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 > last_row ? last_row : 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; + + Error: + dec->status_ = VP8_STATUS_BITSTREAM_ERROR; + return 0; +} + +// ----------------------------------------------------------------------------- +// VP8LTransform + +static void ClearTransform(VP8LTransform* const transform) { + WebPSafeFree(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. + WebPSafeFree(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 != NULL); + memset(hdr, 0, sizeof(*hdr)); +} + +static void ClearMetadata(VP8LMetadata* const hdr) { + assert(hdr != NULL); + + WebPSafeFree(hdr->huffman_image_); + WebPSafeFree(hdr->huffman_tables_); + VP8LHtreeGroupsFree(hdr->htree_groups_); + VP8LColorCacheClear(&hdr->color_cache_); + VP8LColorCacheClear(&hdr->saved_color_cache_); + InitMetadata(hdr); +} + +// ----------------------------------------------------------------------------- +// VP8LDecoder + +VP8LDecoder* VP8LNew(void) { + VP8LDecoder* const dec = (VP8LDecoder*)WebPSafeCalloc(1ULL, sizeof(*dec)); + if (dec == NULL) return NULL; + dec->status_ = VP8_STATUS_OK; + dec->state_ = READ_DIM; + + VP8LDspInit(); // Init critical function pointers. + + return dec; +} + +void VP8LClear(VP8LDecoder* const dec) { + int i; + if (dec == NULL) return; + ClearMetadata(&dec->hdr_); + + 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; + + WebPSafeFree(dec->rescaler_memory); + dec->rescaler_memory = NULL; + + dec->output_ = NULL; // leave no trace behind +} + +void VP8LDelete(VP8LDecoder* const dec) { + if (dec != NULL) { + VP8LClear(dec); + WebPSafeFree(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, + transform_ysize, NULL); + ok = ok && !br->eos_; + + End: + if (!ok) { + WebPSafeFree(data); + ClearMetadata(hdr); + } 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); + } + dec->last_pixel_ = 0; // Reset for future DECODE_DATA_FUNC() calls. + if (!is_level0) ClearMetadata(hdr); // Clean up temporary data behind. + } + return ok; +} + +//------------------------------------------------------------------------------ +// 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. 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->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->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. +static void ExtractAlphaRows(VP8LDecoder* const dec, int last_row) { + int cur_row = dec->last_row_; + int num_rows = last_row - cur_row; + const uint32_t* in = dec->pixels_ + dec->width_ * cur_row; + + assert(last_row <= dec->io_->crop_bottom); + while (num_rows > 0) { + const int num_rows_to_process = + (num_rows > NUM_ARGB_CACHE_ROWS) ? NUM_ARGB_CACHE_ROWS : num_rows; + // Extract alpha (which is stored in the green plane). + ALPHDecoder* const alph_dec = (ALPHDecoder*)dec->io_->opaque; + uint8_t* const output = alph_dec->output_; + const int width = dec->io_->width; // the final width (!= dec->width_) + const int cache_pixs = width * num_rows_to_process; + uint8_t* const dst = output + width * cur_row; + const uint32_t* const src = dec->argb_cache_; + int i; + ApplyInverseTransforms(dec, num_rows_to_process, in); + for (i = 0; i < cache_pixs; ++i) dst[i] = (src[i] >> 8) & 0xff; + AlphaApplyFilter(alph_dec, + cur_row, cur_row + num_rows_to_process, dst, width); + num_rows -= num_rows_to_process; + in += num_rows_to_process * dec->width_; + cur_row += num_rows_to_process; + } + assert(cur_row == last_row); + dec->last_row_ = dec->last_out_row_ = last_row; +} + +int VP8LDecodeAlphaHeader(ALPHDecoder* const alph_dec, + const uint8_t* const data, size_t data_size) { + int ok = 0; + VP8LDecoder* dec = VP8LNew(); + + if (dec == NULL) return 0; + + assert(alph_dec != NULL); + alph_dec->vp8l_dec_ = dec; + + dec->width_ = alph_dec->width_; + dec->height_ = alph_dec->height_; + dec->io_ = &alph_dec->io_; + dec->io_->opaque = alph_dec; + dec->io_->width = alph_dec->width_; + dec->io_->height = alph_dec->height_; + + dec->status_ = VP8_STATUS_OK; + VP8LInitBitReader(&dec->br_, data, data_size); + + if (!DecodeImageStream(alph_dec->width_, alph_dec->height_, 1, dec, NULL)) { + 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_); + } + + if (!ok) goto Err; + + return 1; + + Err: + 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_row_ >= last_row) { + 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); +} + +//------------------------------------------------------------------------------ + +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; + + 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; + + 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); + + // Initialization. + 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 (!AllocateInternalBuffers32b(dec, io->width)) 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. + if (!DecodeImageData(dec, dec->pixels_, dec->width_, dec->height_, + io->crop_bottom, ProcessRows)) { + goto Err; + } + + params->last_y = dec->last_out_row_; + return 1; + + Err: + VP8LClear(dec); + assert(dec->status_ != VP8_STATUS_OK); + return 0; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dec/vp8li.h b/thirdparty/libwebp/dec/vp8li.h new file mode 100644 index 0000000000..9313bdc0af --- /dev/null +++ b/thirdparty/libwebp/dec/vp8li.h @@ -0,0 +1,135 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// 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" + +#ifdef __cplusplus +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 { + int color_cache_size_; + VP8LColorCache color_cache_; + VP8LColorCache saved_color_cache_; // for incremental + + int huffman_mask_; + int huffman_subsample_bits_; + int huffman_xsize_; + uint32_t *huffman_image_; + int num_htree_groups_; + HTreeGroup *htree_groups_; + HuffmanCode *huffman_tables_; +} VP8LMetadata; + +typedef struct VP8LDecoder VP8LDecoder; +struct VP8LDecoder { + VP8StatusCode status_; + VP8LDecodeState state_; + VP8Io *io_; + + const WebPDecBuffer *output_; // shortcut to io->opaque->output + + 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_; + + 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. +}; + +//------------------------------------------------------------------------------ +// internal functions. Not public. + +struct ALPHDecoder; // Defined in dec/alphai.h. + +// in vp8l.c + +// 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); + +// 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); + +// 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); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_DEC_VP8LI_H_ */ diff --git a/thirdparty/libwebp/dec/webp.c b/thirdparty/libwebp/dec/webp.c new file mode 100644 index 0000000000..d0b912f02f --- /dev/null +++ b/thirdparty/libwebp/dec/webp.c @@ -0,0 +1,846 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <stdlib.h> + +#include "./vp8i.h" +#include "./vp8li.h" +#include "./webpi.h" +#include "../utils/utils.h" +#include "../webp/mux_types.h" // ALPHA_FLAG + +//------------------------------------------------------------------------------ +// 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, 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. + +// Validates the RIFF container (if detected) and skips over it. +// 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, int have_all_data, + 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 = 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; + *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 = GetLE32(*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 = 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 + } + + 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 = 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; + + // 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. + } + + // 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; + } + + if (!memcmp(buf, "ALPH", TAG_SIZE)) { // A valid ALPH header. + *alpha_data = buf + CHUNK_HEADER_SIZE; + *alpha_size = chunk_size; + } + + // 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, 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); + 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 = 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; + *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, + 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; + + 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, have_all_data, &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, + &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); + 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) { + 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) || + (!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) { + goto ReturnWidthHeight; // Invalid chunk size / insufficient data. + } + } + + // Skip over VP8/VP8L header. + status = ParseVP8Header(&data, &data_size, have_all_data, hdrs.riff_size, + &hdrs.compressed_size, &hdrs.is_lossless); + if (status != VP8_STATUS_OK) { + 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) { + status = VP8_STATUS_NOT_ENOUGH_DATA; + goto ReturnWidthHeight; + } + // Validates raw VP8 data. + 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) { + status = VP8_STATUS_NOT_ENOUGH_DATA; + goto ReturnWidthHeight; + } + // Validates raw VP8L data. + if (!VP8LGetInfo(data, data_size, &image_width, &image_height, has_alpha)) { + return VP8_STATUS_BITSTREAM_ERROR; + } + } + // 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; + headers->offset = data - headers->data; + assert((uint64_t)(data - headers->data) < MAX_CHUNK_PAYLOAD); + assert(headers->offset == headers->data_size - data_size); + } + 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) { + // status is marked volatile as a workaround for a clang-3.8 (aarch64) bug + volatile VP8StatusCode status; + int has_animation = 0; + assert(headers != NULL); + // fill out headers, ignore width/height/has_alpha. + 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 != NULL) { + 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; + headers.have_all_data = 1; + 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; + } + 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 + // 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_; + } + } + } + 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); + } else { + if (params->options != NULL && params->options->flip) { + // This restores the original stride values if options->flip was used + // during the call to WebPAllocateDecBuffer above. + status = WebPFlipBuffer(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)); +} + +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 the features. + return ParseHeadersInternal(data, data_size, + &features->width, &features->height, + &features->has_alpha, &features->has_animation, + &features->format, 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) { + 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; + } + return GetFeatures(data, data_size, features); +} + +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.options = &config->options; + params.output = &config->output; + if (WebPAvoidSlowMemory(params.output, &config->input)) { + // decoding to slow memory: use a temporary in-mem buffer to decode into. + WebPDecBuffer in_mem_buffer; + WebPInitDecBuffer(&in_mem_buffer); + in_mem_buffer.colorspace = config->output.colorspace; + in_mem_buffer.width = config->input.width; + in_mem_buffer.height = config->input.height; + params.output = &in_mem_buffer; + status = DecodeInto(data, data_size, ¶ms); + if (status == VP8_STATUS_OK) { // do the slow-copy + status = WebPCopyDecBufferPixels(&in_mem_buffer, &config->output); + } + WebPFreeDecBuffer(&in_mem_buffer); + } else { + 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 + x &= ~1; + y &= ~1; + } + 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) { + 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 = scaled_width; + io->scaled_height = scaled_height; + } + + // Filter + io->bypass_filtering = (options != NULL) && 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; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dec/webpi.h b/thirdparty/libwebp/dec/webpi.h new file mode 100644 index 0000000000..991b194c22 --- /dev/null +++ b/thirdparty/libwebp/dec/webpi.h @@ -0,0 +1,142 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: somnath@google.com (Somnath Banerjee) + +#ifndef WEBP_DEC_WEBPI_H_ +#define WEBP_DEC_WEBPI_H_ + +#ifdef __cplusplus +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 (*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. + 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 + OutputAlphaFunc emit_alpha; // output alpha channel + OutputRowFunc emit_alpha_row; // output one line of rescaled alpha values + + WebPDecBuffer* final_output; // In case the user supplied a slow-memory + // output, we decode image in temporary buffer + // (this::output) and copy it here. + WebPDecBuffer tmp_buffer; // this::output will point to this one in case + // of slow memory. +}; + +// Should be called first, before any use of the WebPDecParams object. +void WebPResetDecParams(WebPDecParams* const params); + +// Delete all memory (after an error occurred, for instance) +void WebPFreeDecParams(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 + 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 + 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, 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); + +//------------------------------------------------------------------------------ +// 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. +// 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'). No pixels are copied. +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); + +// Copy pixels from 'src' into a *preallocated* 'dst' buffer. Returns +// VP8_STATUS_INVALID_PARAM if the 'dst' is not set up correctly for the copy. +VP8StatusCode WebPCopyDecBufferPixels(const WebPDecBuffer* const src, + WebPDecBuffer* const dst); + +// Returns true if decoding will be slow with the current configuration +// and bitstream features. +int WebPAvoidSlowMemory(const WebPDecBuffer* const output, + const WebPBitstreamFeatures* const features); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_DEC_WEBPI_H_ */ diff --git a/thirdparty/libwebp/demux/anim_decode.c b/thirdparty/libwebp/demux/anim_decode.c new file mode 100644 index 0000000000..1989eb4ab4 --- /dev/null +++ b/thirdparty/libwebp/demux/anim_decode.c @@ -0,0 +1,442 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// AnimDecoder implementation. +// + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include <assert.h> +#include <string.h> + +#include "../utils/utils.h" +#include "../webp/decode.h" +#include "../webp/demux.h" + +#define NUM_CHANNELS 4 + +typedef void (*BlendRowFunc)(uint32_t* const, const uint32_t* const, int); +static void BlendPixelRowNonPremult(uint32_t* const src, + const uint32_t* const dst, int num_pixels); +static void BlendPixelRowPremult(uint32_t* const src, const uint32_t* const dst, + int num_pixels); + +struct WebPAnimDecoder { + WebPDemuxer* demux_; // Demuxer created from given WebP bitstream. + WebPDecoderConfig config_; // Decoder config. + // Note: we use a pointer to a function blending multiple pixels at a time to + // allow possible inlining of per-pixel blending function. + BlendRowFunc blend_func_; // Pointer to the chose blend row function. + WebPAnimInfo info_; // Global info about the animation. + uint8_t* curr_frame_; // Current canvas (not disposed). + uint8_t* prev_frame_disposed_; // Previous canvas (properly disposed). + int prev_frame_timestamp_; // Previous frame timestamp (milliseconds). + WebPIterator prev_iter_; // Iterator object for previous frame. + int prev_frame_was_keyframe_; // True if previous frame was a keyframe. + int next_frame_; // Index of the next frame to be decoded + // (starting from 1). +}; + +static void DefaultDecoderOptions(WebPAnimDecoderOptions* const dec_options) { + dec_options->color_mode = MODE_RGBA; + dec_options->use_threads = 0; +} + +int WebPAnimDecoderOptionsInitInternal(WebPAnimDecoderOptions* dec_options, + int abi_version) { + if (dec_options == NULL || + WEBP_ABI_IS_INCOMPATIBLE(abi_version, WEBP_DEMUX_ABI_VERSION)) { + return 0; + } + DefaultDecoderOptions(dec_options); + return 1; +} + +static int ApplyDecoderOptions(const WebPAnimDecoderOptions* const dec_options, + WebPAnimDecoder* const dec) { + WEBP_CSP_MODE mode; + WebPDecoderConfig* config = &dec->config_; + assert(dec_options != NULL); + + mode = dec_options->color_mode; + if (mode != MODE_RGBA && mode != MODE_BGRA && + mode != MODE_rgbA && mode != MODE_bgrA) { + return 0; + } + dec->blend_func_ = (mode == MODE_RGBA || mode == MODE_BGRA) + ? &BlendPixelRowNonPremult + : &BlendPixelRowPremult; + WebPInitDecoderConfig(config); + config->output.colorspace = mode; + config->output.is_external_memory = 1; + config->options.use_threads = dec_options->use_threads; + // Note: config->output.u.RGBA is set at the time of decoding each frame. + return 1; +} + +WebPAnimDecoder* WebPAnimDecoderNewInternal( + const WebPData* webp_data, const WebPAnimDecoderOptions* dec_options, + int abi_version) { + WebPAnimDecoderOptions options; + WebPAnimDecoder* dec = NULL; + if (webp_data == NULL || + WEBP_ABI_IS_INCOMPATIBLE(abi_version, WEBP_DEMUX_ABI_VERSION)) { + return NULL; + } + + // Note: calloc() so that the pointer members are initialized to NULL. + dec = (WebPAnimDecoder*)WebPSafeCalloc(1ULL, sizeof(*dec)); + if (dec == NULL) goto Error; + + if (dec_options != NULL) { + options = *dec_options; + } else { + DefaultDecoderOptions(&options); + } + if (!ApplyDecoderOptions(&options, dec)) goto Error; + + dec->demux_ = WebPDemux(webp_data); + if (dec->demux_ == NULL) goto Error; + + dec->info_.canvas_width = WebPDemuxGetI(dec->demux_, WEBP_FF_CANVAS_WIDTH); + dec->info_.canvas_height = WebPDemuxGetI(dec->demux_, WEBP_FF_CANVAS_HEIGHT); + dec->info_.loop_count = WebPDemuxGetI(dec->demux_, WEBP_FF_LOOP_COUNT); + dec->info_.bgcolor = WebPDemuxGetI(dec->demux_, WEBP_FF_BACKGROUND_COLOR); + dec->info_.frame_count = WebPDemuxGetI(dec->demux_, WEBP_FF_FRAME_COUNT); + + { + const int canvas_bytes = + dec->info_.canvas_width * NUM_CHANNELS * dec->info_.canvas_height; + // Note: calloc() because we fill frame with zeroes as well. + dec->curr_frame_ = WebPSafeCalloc(1ULL, canvas_bytes); + if (dec->curr_frame_ == NULL) goto Error; + dec->prev_frame_disposed_ = WebPSafeCalloc(1ULL, canvas_bytes); + if (dec->prev_frame_disposed_ == NULL) goto Error; + } + + WebPAnimDecoderReset(dec); + + return dec; + + Error: + WebPAnimDecoderDelete(dec); + return NULL; +} + +int WebPAnimDecoderGetInfo(const WebPAnimDecoder* dec, WebPAnimInfo* info) { + if (dec == NULL || info == NULL) return 0; + *info = dec->info_; + return 1; +} + +// Returns true if the frame covers the full canvas. +static int IsFullFrame(int width, int height, int canvas_width, + int canvas_height) { + return (width == canvas_width && height == canvas_height); +} + +// Clear the canvas to transparent. +static void ZeroFillCanvas(uint8_t* buf, uint32_t canvas_width, + uint32_t canvas_height) { + memset(buf, 0, canvas_width * NUM_CHANNELS * canvas_height); +} + +// Clear given frame rectangle to transparent. +static void ZeroFillFrameRect(uint8_t* buf, int buf_stride, int x_offset, + int y_offset, int width, int height) { + int j; + assert(width * NUM_CHANNELS <= buf_stride); + buf += y_offset * buf_stride + x_offset * NUM_CHANNELS; + for (j = 0; j < height; ++j) { + memset(buf, 0, width * NUM_CHANNELS); + buf += buf_stride; + } +} + +// Copy width * height pixels from 'src' to 'dst'. +static void CopyCanvas(const uint8_t* src, uint8_t* dst, + uint32_t width, uint32_t height) { + assert(src != NULL && dst != NULL); + memcpy(dst, src, width * NUM_CHANNELS * height); +} + +// Returns true if the current frame is a key-frame. +static int IsKeyFrame(const WebPIterator* const curr, + const WebPIterator* const prev, + int prev_frame_was_key_frame, + int canvas_width, int canvas_height) { + if (curr->frame_num == 1) { + return 1; + } else if ((!curr->has_alpha || curr->blend_method == WEBP_MUX_NO_BLEND) && + IsFullFrame(curr->width, curr->height, + canvas_width, canvas_height)) { + return 1; + } else { + return (prev->dispose_method == WEBP_MUX_DISPOSE_BACKGROUND) && + (IsFullFrame(prev->width, prev->height, canvas_width, + canvas_height) || + prev_frame_was_key_frame); + } +} + + +// Blend a single channel of 'src' over 'dst', given their alpha channel values. +// 'src' and 'dst' are assumed to be NOT pre-multiplied by alpha. +static uint8_t BlendChannelNonPremult(uint32_t src, uint8_t src_a, + uint32_t dst, uint8_t dst_a, + uint32_t scale, int shift) { + const uint8_t src_channel = (src >> shift) & 0xff; + const uint8_t dst_channel = (dst >> shift) & 0xff; + const uint32_t blend_unscaled = src_channel * src_a + dst_channel * dst_a; + assert(blend_unscaled < (1ULL << 32) / scale); + return (blend_unscaled * scale) >> 24; +} + +// Blend 'src' over 'dst' assuming they are NOT pre-multiplied by alpha. +static uint32_t BlendPixelNonPremult(uint32_t src, uint32_t dst) { + const uint8_t src_a = (src >> 24) & 0xff; + + if (src_a == 0) { + return dst; + } else { + const uint8_t dst_a = (dst >> 24) & 0xff; + // This is the approximate integer arithmetic for the actual formula: + // dst_factor_a = (dst_a * (255 - src_a)) / 255. + const uint8_t dst_factor_a = (dst_a * (256 - src_a)) >> 8; + const uint8_t blend_a = src_a + dst_factor_a; + const uint32_t scale = (1UL << 24) / blend_a; + + const uint8_t blend_r = + BlendChannelNonPremult(src, src_a, dst, dst_factor_a, scale, 0); + const uint8_t blend_g = + BlendChannelNonPremult(src, src_a, dst, dst_factor_a, scale, 8); + const uint8_t blend_b = + BlendChannelNonPremult(src, src_a, dst, dst_factor_a, scale, 16); + assert(src_a + dst_factor_a < 256); + + return (blend_r << 0) | + (blend_g << 8) | + (blend_b << 16) | + ((uint32_t)blend_a << 24); + } +} + +// Blend 'num_pixels' in 'src' over 'dst' assuming they are NOT pre-multiplied +// by alpha. +static void BlendPixelRowNonPremult(uint32_t* const src, + const uint32_t* const dst, int num_pixels) { + int i; + for (i = 0; i < num_pixels; ++i) { + const uint8_t src_alpha = (src[i] >> 24) & 0xff; + if (src_alpha != 0xff) { + src[i] = BlendPixelNonPremult(src[i], dst[i]); + } + } +} + +// Individually multiply each channel in 'pix' by 'scale'. +static WEBP_INLINE uint32_t ChannelwiseMultiply(uint32_t pix, uint32_t scale) { + uint32_t mask = 0x00FF00FF; + uint32_t rb = ((pix & mask) * scale) >> 8; + uint32_t ag = ((pix >> 8) & mask) * scale; + return (rb & mask) | (ag & ~mask); +} + +// Blend 'src' over 'dst' assuming they are pre-multiplied by alpha. +static uint32_t BlendPixelPremult(uint32_t src, uint32_t dst) { + const uint8_t src_a = (src >> 24) & 0xff; + return src + ChannelwiseMultiply(dst, 256 - src_a); +} + +// Blend 'num_pixels' in 'src' over 'dst' assuming they are pre-multiplied by +// alpha. +static void BlendPixelRowPremult(uint32_t* const src, const uint32_t* const dst, + int num_pixels) { + int i; + for (i = 0; i < num_pixels; ++i) { + const uint8_t src_alpha = (src[i] >> 24) & 0xff; + if (src_alpha != 0xff) { + src[i] = BlendPixelPremult(src[i], dst[i]); + } + } +} + +// Returns two ranges (<left, width> pairs) at row 'canvas_y', that belong to +// 'src' but not 'dst'. A point range is empty if the corresponding width is 0. +static void FindBlendRangeAtRow(const WebPIterator* const src, + const WebPIterator* const dst, int canvas_y, + int* const left1, int* const width1, + int* const left2, int* const width2) { + const int src_max_x = src->x_offset + src->width; + const int dst_max_x = dst->x_offset + dst->width; + const int dst_max_y = dst->y_offset + dst->height; + assert(canvas_y >= src->y_offset && canvas_y < (src->y_offset + src->height)); + *left1 = -1; + *width1 = 0; + *left2 = -1; + *width2 = 0; + + if (canvas_y < dst->y_offset || canvas_y >= dst_max_y || + src->x_offset >= dst_max_x || src_max_x <= dst->x_offset) { + *left1 = src->x_offset; + *width1 = src->width; + return; + } + + if (src->x_offset < dst->x_offset) { + *left1 = src->x_offset; + *width1 = dst->x_offset - src->x_offset; + } + + if (src_max_x > dst_max_x) { + *left2 = dst_max_x; + *width2 = src_max_x - dst_max_x; + } +} + +int WebPAnimDecoderGetNext(WebPAnimDecoder* dec, + uint8_t** buf_ptr, int* timestamp_ptr) { + WebPIterator iter; + uint32_t width; + uint32_t height; + int is_key_frame; + int timestamp; + BlendRowFunc blend_row; + + if (dec == NULL || buf_ptr == NULL || timestamp_ptr == NULL) return 0; + if (!WebPAnimDecoderHasMoreFrames(dec)) return 0; + + width = dec->info_.canvas_width; + height = dec->info_.canvas_height; + blend_row = dec->blend_func_; + + // Get compressed frame. + if (!WebPDemuxGetFrame(dec->demux_, dec->next_frame_, &iter)) { + return 0; + } + timestamp = dec->prev_frame_timestamp_ + iter.duration; + + // Initialize. + is_key_frame = IsKeyFrame(&iter, &dec->prev_iter_, + dec->prev_frame_was_keyframe_, width, height); + if (is_key_frame) { + ZeroFillCanvas(dec->curr_frame_, width, height); + } else { + CopyCanvas(dec->prev_frame_disposed_, dec->curr_frame_, width, height); + } + + // Decode. + { + const uint8_t* in = iter.fragment.bytes; + const size_t in_size = iter.fragment.size; + const size_t out_offset = + (iter.y_offset * width + iter.x_offset) * NUM_CHANNELS; + WebPDecoderConfig* const config = &dec->config_; + WebPRGBABuffer* const buf = &config->output.u.RGBA; + buf->stride = NUM_CHANNELS * width; + buf->size = buf->stride * iter.height; + buf->rgba = dec->curr_frame_ + out_offset; + + if (WebPDecode(in, in_size, config) != VP8_STATUS_OK) { + goto Error; + } + } + + // During the decoding of current frame, we may have set some pixels to be + // transparent (i.e. alpha < 255). However, the value of each of these + // pixels should have been determined by blending it against the value of + // that pixel in the previous frame if blending method of is WEBP_MUX_BLEND. + if (iter.frame_num > 1 && iter.blend_method == WEBP_MUX_BLEND && + !is_key_frame) { + if (dec->prev_iter_.dispose_method == WEBP_MUX_DISPOSE_NONE) { + int y; + // Blend transparent pixels with pixels in previous canvas. + for (y = 0; y < iter.height; ++y) { + const size_t offset = + (iter.y_offset + y) * width + iter.x_offset; + blend_row((uint32_t*)dec->curr_frame_ + offset, + (uint32_t*)dec->prev_frame_disposed_ + offset, iter.width); + } + } else { + int y; + assert(dec->prev_iter_.dispose_method == WEBP_MUX_DISPOSE_BACKGROUND); + // We need to blend a transparent pixel with its value just after + // initialization. That is, blend it with: + // * Fully transparent pixel if it belongs to prevRect <-- No-op. + // * The pixel in the previous canvas otherwise <-- Need alpha-blending. + for (y = 0; y < iter.height; ++y) { + const int canvas_y = iter.y_offset + y; + int left1, width1, left2, width2; + FindBlendRangeAtRow(&iter, &dec->prev_iter_, canvas_y, &left1, &width1, + &left2, &width2); + if (width1 > 0) { + const size_t offset1 = canvas_y * width + left1; + blend_row((uint32_t*)dec->curr_frame_ + offset1, + (uint32_t*)dec->prev_frame_disposed_ + offset1, width1); + } + if (width2 > 0) { + const size_t offset2 = canvas_y * width + left2; + blend_row((uint32_t*)dec->curr_frame_ + offset2, + (uint32_t*)dec->prev_frame_disposed_ + offset2, width2); + } + } + } + } + + // Update info of the previous frame and dispose it for the next iteration. + dec->prev_frame_timestamp_ = timestamp; + dec->prev_iter_ = iter; + dec->prev_frame_was_keyframe_ = is_key_frame; + CopyCanvas(dec->curr_frame_, dec->prev_frame_disposed_, width, height); + if (dec->prev_iter_.dispose_method == WEBP_MUX_DISPOSE_BACKGROUND) { + ZeroFillFrameRect(dec->prev_frame_disposed_, width * NUM_CHANNELS, + dec->prev_iter_.x_offset, dec->prev_iter_.y_offset, + dec->prev_iter_.width, dec->prev_iter_.height); + } + ++dec->next_frame_; + + // All OK, fill in the values. + *buf_ptr = dec->curr_frame_; + *timestamp_ptr = timestamp; + return 1; + + Error: + WebPDemuxReleaseIterator(&iter); + return 0; +} + +int WebPAnimDecoderHasMoreFrames(const WebPAnimDecoder* dec) { + if (dec == NULL) return 0; + return (dec->next_frame_ <= (int)dec->info_.frame_count); +} + +void WebPAnimDecoderReset(WebPAnimDecoder* dec) { + if (dec != NULL) { + dec->prev_frame_timestamp_ = 0; + memset(&dec->prev_iter_, 0, sizeof(dec->prev_iter_)); + dec->prev_frame_was_keyframe_ = 0; + dec->next_frame_ = 1; + } +} + +const WebPDemuxer* WebPAnimDecoderGetDemuxer(const WebPAnimDecoder* dec) { + if (dec == NULL) return NULL; + return dec->demux_; +} + +void WebPAnimDecoderDelete(WebPAnimDecoder* dec) { + if (dec != NULL) { + WebPDemuxDelete(dec->demux_); + WebPSafeFree(dec->curr_frame_); + WebPSafeFree(dec->prev_frame_disposed_); + WebPSafeFree(dec); + } +} diff --git a/thirdparty/libwebp/demux/demux.c b/thirdparty/libwebp/demux/demux.c new file mode 100644 index 0000000000..0d2989f6f4 --- /dev/null +++ b/thirdparty/libwebp/demux/demux.c @@ -0,0 +1,966 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 container demux. +// + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include <assert.h> +#include <stdlib.h> +#include <string.h> + +#include "../utils/utils.h" +#include "../webp/decode.h" // WebPGetFeatures +#include "../webp/demux.h" +#include "../webp/format_constants.h" + +#define DMUX_MAJ_VERSION 0 +#define DMUX_MIN_VERSION 3 +#define DMUX_REV_VERSION 0 + +typedef struct { + size_t start_; // start location of the data + size_t end_; // end location + size_t riff_end_; // riff chunk end location, can be > end_. + size_t buf_size_; // size of the buffer + const uint8_t* buf_; +} MemBuffer; + +typedef struct { + size_t offset_; + size_t size_; +} ChunkData; + +typedef struct Frame { + int x_offset_, y_offset_; + int width_, height_; + int has_alpha_; + int duration_; + WebPMuxAnimDispose dispose_method_; + WebPMuxAnimBlend blend_method_; + int frame_num_; + int complete_; // img_components_ contains a full image. + ChunkData img_components_[2]; // 0=VP8{,L} 1=ALPH + struct Frame* next_; +} Frame; + +typedef struct Chunk { + ChunkData data_; + struct Chunk* next_; +} Chunk; + +struct WebPDemuxer { + MemBuffer mem_; + WebPDemuxState state_; + int is_ext_format_; + uint32_t feature_flags_; + int canvas_width_, canvas_height_; + int loop_count_; + uint32_t bgcolor_; + int num_frames_; + Frame* frames_; + Frame** frames_tail_; + Chunk* chunks_; // non-image chunks + Chunk** chunks_tail_; +}; + +typedef enum { + PARSE_OK, + PARSE_NEED_MORE_DATA, + PARSE_ERROR +} ParseStatus; + +typedef struct ChunkParser { + uint8_t id[4]; + ParseStatus (*parse)(WebPDemuxer* const dmux); + int (*valid)(const WebPDemuxer* const dmux); +} ChunkParser; + +static ParseStatus ParseSingleImage(WebPDemuxer* const dmux); +static ParseStatus ParseVP8X(WebPDemuxer* const dmux); +static int IsValidSimpleFormat(const WebPDemuxer* const dmux); +static int IsValidExtendedFormat(const WebPDemuxer* const dmux); + +static const ChunkParser kMasterChunks[] = { + { { 'V', 'P', '8', ' ' }, ParseSingleImage, IsValidSimpleFormat }, + { { 'V', 'P', '8', 'L' }, ParseSingleImage, IsValidSimpleFormat }, + { { 'V', 'P', '8', 'X' }, ParseVP8X, IsValidExtendedFormat }, + { { '0', '0', '0', '0' }, NULL, NULL }, +}; + +//------------------------------------------------------------------------------ + +int WebPGetDemuxVersion(void) { + return (DMUX_MAJ_VERSION << 16) | (DMUX_MIN_VERSION << 8) | DMUX_REV_VERSION; +} + +// ----------------------------------------------------------------------------- +// MemBuffer + +static int RemapMemBuffer(MemBuffer* const mem, + const uint8_t* data, size_t size) { + if (size < mem->buf_size_) return 0; // can't remap to a shorter buffer! + + mem->buf_ = data; + mem->end_ = mem->buf_size_ = size; + return 1; +} + +static int InitMemBuffer(MemBuffer* const mem, + const uint8_t* data, size_t size) { + memset(mem, 0, sizeof(*mem)); + return RemapMemBuffer(mem, data, size); +} + +// Return the remaining data size available in 'mem'. +static WEBP_INLINE size_t MemDataSize(const MemBuffer* const mem) { + return (mem->end_ - mem->start_); +} + +// Return true if 'size' exceeds the end of the RIFF chunk. +static WEBP_INLINE int SizeIsInvalid(const MemBuffer* const mem, size_t size) { + return (size > mem->riff_end_ - mem->start_); +} + +static WEBP_INLINE void Skip(MemBuffer* const mem, size_t size) { + mem->start_ += size; +} + +static WEBP_INLINE void Rewind(MemBuffer* const mem, size_t size) { + mem->start_ -= size; +} + +static WEBP_INLINE const uint8_t* GetBuffer(MemBuffer* const mem) { + return mem->buf_ + mem->start_; +} + +// Read from 'mem' and skip the read bytes. +static WEBP_INLINE uint8_t ReadByte(MemBuffer* const mem) { + const uint8_t byte = mem->buf_[mem->start_]; + Skip(mem, 1); + return byte; +} + +static WEBP_INLINE int ReadLE16s(MemBuffer* const mem) { + const uint8_t* const data = mem->buf_ + mem->start_; + const int val = GetLE16(data); + Skip(mem, 2); + return val; +} + +static WEBP_INLINE int ReadLE24s(MemBuffer* const mem) { + const uint8_t* const data = mem->buf_ + mem->start_; + const int val = GetLE24(data); + Skip(mem, 3); + return val; +} + +static WEBP_INLINE uint32_t ReadLE32(MemBuffer* const mem) { + const uint8_t* const data = mem->buf_ + mem->start_; + const uint32_t val = GetLE32(data); + Skip(mem, 4); + return val; +} + +// ----------------------------------------------------------------------------- +// Secondary chunk parsing + +static void AddChunk(WebPDemuxer* const dmux, Chunk* const chunk) { + *dmux->chunks_tail_ = chunk; + chunk->next_ = NULL; + dmux->chunks_tail_ = &chunk->next_; +} + +// Add a frame to the end of the list, ensuring the last frame is complete. +// Returns true on success, false otherwise. +static int AddFrame(WebPDemuxer* const dmux, Frame* const frame) { + const Frame* const last_frame = *dmux->frames_tail_; + if (last_frame != NULL && !last_frame->complete_) return 0; + + *dmux->frames_tail_ = frame; + frame->next_ = NULL; + dmux->frames_tail_ = &frame->next_; + return 1; +} + +static void SetFrameInfo(size_t start_offset, size_t size, + int frame_num, int complete, + const WebPBitstreamFeatures* const features, + Frame* const frame) { + frame->img_components_[0].offset_ = start_offset; + frame->img_components_[0].size_ = size; + frame->width_ = features->width; + frame->height_ = features->height; + frame->has_alpha_ |= features->has_alpha; + frame->frame_num_ = frame_num; + frame->complete_ = complete; +} + +// Store image bearing chunks to 'frame'. +static ParseStatus StoreFrame(int frame_num, uint32_t min_size, + MemBuffer* const mem, Frame* const frame) { + int alpha_chunks = 0; + int image_chunks = 0; + int done = (MemDataSize(mem) < min_size); + ParseStatus status = PARSE_OK; + + if (done) return PARSE_NEED_MORE_DATA; + + do { + const size_t chunk_start_offset = mem->start_; + const uint32_t fourcc = ReadLE32(mem); + const uint32_t payload_size = ReadLE32(mem); + const uint32_t payload_size_padded = payload_size + (payload_size & 1); + const size_t payload_available = (payload_size_padded > MemDataSize(mem)) + ? MemDataSize(mem) : payload_size_padded; + const size_t chunk_size = CHUNK_HEADER_SIZE + payload_available; + + if (payload_size > MAX_CHUNK_PAYLOAD) return PARSE_ERROR; + if (SizeIsInvalid(mem, payload_size_padded)) return PARSE_ERROR; + if (payload_size_padded > MemDataSize(mem)) status = PARSE_NEED_MORE_DATA; + + switch (fourcc) { + case MKFOURCC('A', 'L', 'P', 'H'): + if (alpha_chunks == 0) { + ++alpha_chunks; + frame->img_components_[1].offset_ = chunk_start_offset; + frame->img_components_[1].size_ = chunk_size; + frame->has_alpha_ = 1; + frame->frame_num_ = frame_num; + Skip(mem, payload_available); + } else { + goto Done; + } + break; + case MKFOURCC('V', 'P', '8', 'L'): + if (alpha_chunks > 0) return PARSE_ERROR; // VP8L has its own alpha + // fall through + case MKFOURCC('V', 'P', '8', ' '): + if (image_chunks == 0) { + // Extract the bitstream features, tolerating failures when the data + // is incomplete. + WebPBitstreamFeatures features; + const VP8StatusCode vp8_status = + WebPGetFeatures(mem->buf_ + chunk_start_offset, chunk_size, + &features); + if (status == PARSE_NEED_MORE_DATA && + vp8_status == VP8_STATUS_NOT_ENOUGH_DATA) { + return PARSE_NEED_MORE_DATA; + } else if (vp8_status != VP8_STATUS_OK) { + // We have enough data, and yet WebPGetFeatures() failed. + return PARSE_ERROR; + } + ++image_chunks; + SetFrameInfo(chunk_start_offset, chunk_size, frame_num, + status == PARSE_OK, &features, frame); + Skip(mem, payload_available); + } else { + goto Done; + } + break; + Done: + default: + // Restore fourcc/size when moving up one level in parsing. + Rewind(mem, CHUNK_HEADER_SIZE); + done = 1; + break; + } + + if (mem->start_ == mem->riff_end_) { + done = 1; + } else if (MemDataSize(mem) < CHUNK_HEADER_SIZE) { + status = PARSE_NEED_MORE_DATA; + } + } while (!done && status == PARSE_OK); + + return status; +} + +// Creates a new Frame if 'actual_size' is within bounds and 'mem' contains +// enough data ('min_size') to parse the payload. +// Returns PARSE_OK on success with *frame pointing to the new Frame. +// Returns PARSE_NEED_MORE_DATA with insufficient data, PARSE_ERROR otherwise. +static ParseStatus NewFrame(const MemBuffer* const mem, + uint32_t min_size, uint32_t actual_size, + Frame** frame) { + if (SizeIsInvalid(mem, min_size)) return PARSE_ERROR; + if (actual_size < min_size) return PARSE_ERROR; + if (MemDataSize(mem) < min_size) return PARSE_NEED_MORE_DATA; + + *frame = (Frame*)WebPSafeCalloc(1ULL, sizeof(**frame)); + return (*frame == NULL) ? PARSE_ERROR : PARSE_OK; +} + +// Parse a 'ANMF' chunk and any image bearing chunks that immediately follow. +// 'frame_chunk_size' is the previously validated, padded chunk size. +static ParseStatus ParseAnimationFrame( + WebPDemuxer* const dmux, uint32_t frame_chunk_size) { + const int is_animation = !!(dmux->feature_flags_ & ANIMATION_FLAG); + const uint32_t anmf_payload_size = frame_chunk_size - ANMF_CHUNK_SIZE; + int added_frame = 0; + int bits; + MemBuffer* const mem = &dmux->mem_; + Frame* frame; + ParseStatus status = + NewFrame(mem, ANMF_CHUNK_SIZE, frame_chunk_size, &frame); + if (status != PARSE_OK) return status; + + frame->x_offset_ = 2 * ReadLE24s(mem); + frame->y_offset_ = 2 * ReadLE24s(mem); + frame->width_ = 1 + ReadLE24s(mem); + frame->height_ = 1 + ReadLE24s(mem); + frame->duration_ = ReadLE24s(mem); + bits = ReadByte(mem); + 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; + if (frame->width_ * (uint64_t)frame->height_ >= MAX_IMAGE_AREA) { + WebPSafeFree(frame); + return PARSE_ERROR; + } + + // Store a frame only if the animation flag is set there is some data for + // this frame is available. + status = StoreFrame(dmux->num_frames_ + 1, anmf_payload_size, mem, frame); + if (status != PARSE_ERROR && is_animation && frame->frame_num_ > 0) { + added_frame = AddFrame(dmux, frame); + if (added_frame) { + ++dmux->num_frames_; + } else { + status = PARSE_ERROR; + } + } + + if (!added_frame) WebPSafeFree(frame); + return status; +} + +// General chunk storage, starting with the header at 'start_offset', allowing +// the user to request the payload via a fourcc string. 'size' includes the +// header and the unpadded payload size. +// Returns true on success, false otherwise. +static int StoreChunk(WebPDemuxer* const dmux, + size_t start_offset, uint32_t size) { + Chunk* const chunk = (Chunk*)WebPSafeCalloc(1ULL, sizeof(*chunk)); + if (chunk == NULL) return 0; + + chunk->data_.offset_ = start_offset; + chunk->data_.size_ = size; + AddChunk(dmux, chunk); + return 1; +} + +// ----------------------------------------------------------------------------- +// Primary chunk parsing + +static ParseStatus ReadHeader(MemBuffer* const mem) { + const size_t min_size = RIFF_HEADER_SIZE + CHUNK_HEADER_SIZE; + uint32_t riff_size; + + // Basic file level validation. + if (MemDataSize(mem) < min_size) return PARSE_NEED_MORE_DATA; + if (memcmp(GetBuffer(mem), "RIFF", CHUNK_SIZE_BYTES) || + memcmp(GetBuffer(mem) + CHUNK_HEADER_SIZE, "WEBP", CHUNK_SIZE_BYTES)) { + return PARSE_ERROR; + } + + riff_size = GetLE32(GetBuffer(mem) + TAG_SIZE); + if (riff_size < CHUNK_HEADER_SIZE) return PARSE_ERROR; + if (riff_size > MAX_CHUNK_PAYLOAD) return PARSE_ERROR; + + // There's no point in reading past the end of the RIFF chunk + mem->riff_end_ = riff_size + CHUNK_HEADER_SIZE; + if (mem->buf_size_ > mem->riff_end_) { + mem->buf_size_ = mem->end_ = mem->riff_end_; + } + + Skip(mem, RIFF_HEADER_SIZE); + return PARSE_OK; +} + +static ParseStatus ParseSingleImage(WebPDemuxer* const dmux) { + const size_t min_size = CHUNK_HEADER_SIZE; + MemBuffer* const mem = &dmux->mem_; + Frame* frame; + ParseStatus status; + int image_added = 0; + + if (dmux->frames_ != NULL) return PARSE_ERROR; + if (SizeIsInvalid(mem, min_size)) return PARSE_ERROR; + if (MemDataSize(mem) < min_size) return PARSE_NEED_MORE_DATA; + + frame = (Frame*)WebPSafeCalloc(1ULL, sizeof(*frame)); + if (frame == NULL) return PARSE_ERROR; + + // For the single image case we allow parsing of a partial frame, but we need + // at least CHUNK_HEADER_SIZE for parsing. + status = StoreFrame(1, CHUNK_HEADER_SIZE, &dmux->mem_, frame); + if (status != PARSE_ERROR) { + const int has_alpha = !!(dmux->feature_flags_ & ALPHA_FLAG); + // Clear any alpha when the alpha flag is missing. + if (!has_alpha && frame->img_components_[1].size_ > 0) { + frame->img_components_[1].offset_ = 0; + frame->img_components_[1].size_ = 0; + frame->has_alpha_ = 0; + } + + // Use the frame width/height as the canvas values for non-vp8x files. + // Also, set ALPHA_FLAG if this is a lossless image with alpha. + if (!dmux->is_ext_format_ && frame->width_ > 0 && frame->height_ > 0) { + dmux->state_ = WEBP_DEMUX_PARSED_HEADER; + dmux->canvas_width_ = frame->width_; + dmux->canvas_height_ = frame->height_; + dmux->feature_flags_ |= frame->has_alpha_ ? ALPHA_FLAG : 0; + } + if (!AddFrame(dmux, frame)) { + status = PARSE_ERROR; // last frame was left incomplete + } else { + image_added = 1; + dmux->num_frames_ = 1; + } + } + + if (!image_added) WebPSafeFree(frame); + return status; +} + +static ParseStatus ParseVP8XChunks(WebPDemuxer* const dmux) { + const int is_animation = !!(dmux->feature_flags_ & ANIMATION_FLAG); + MemBuffer* const mem = &dmux->mem_; + int anim_chunks = 0; + ParseStatus status = PARSE_OK; + + do { + int store_chunk = 1; + const size_t chunk_start_offset = mem->start_; + const uint32_t fourcc = ReadLE32(mem); + const uint32_t chunk_size = ReadLE32(mem); + const uint32_t chunk_size_padded = chunk_size + (chunk_size & 1); + + if (chunk_size > MAX_CHUNK_PAYLOAD) return PARSE_ERROR; + if (SizeIsInvalid(mem, chunk_size_padded)) return PARSE_ERROR; + + switch (fourcc) { + case MKFOURCC('V', 'P', '8', 'X'): { + return PARSE_ERROR; + } + case MKFOURCC('A', 'L', 'P', 'H'): + case MKFOURCC('V', 'P', '8', ' '): + case MKFOURCC('V', 'P', '8', 'L'): { + // check that this isn't an animation (all frames should be in an ANMF). + if (anim_chunks > 0 || is_animation) return PARSE_ERROR; + + Rewind(mem, CHUNK_HEADER_SIZE); + status = ParseSingleImage(dmux); + break; + } + case MKFOURCC('A', 'N', 'I', 'M'): { + if (chunk_size_padded < ANIM_CHUNK_SIZE) return PARSE_ERROR; + + if (MemDataSize(mem) < chunk_size_padded) { + status = PARSE_NEED_MORE_DATA; + } else if (anim_chunks == 0) { + ++anim_chunks; + dmux->bgcolor_ = ReadLE32(mem); + dmux->loop_count_ = ReadLE16s(mem); + Skip(mem, chunk_size_padded - ANIM_CHUNK_SIZE); + } else { + store_chunk = 0; + goto Skip; + } + break; + } + case MKFOURCC('A', 'N', 'M', 'F'): { + if (anim_chunks == 0) return PARSE_ERROR; // 'ANIM' precedes frames. + status = ParseAnimationFrame(dmux, chunk_size_padded); + break; + } + case MKFOURCC('I', 'C', 'C', 'P'): { + store_chunk = !!(dmux->feature_flags_ & ICCP_FLAG); + goto Skip; + } + case MKFOURCC('E', 'X', 'I', 'F'): { + store_chunk = !!(dmux->feature_flags_ & EXIF_FLAG); + goto Skip; + } + case MKFOURCC('X', 'M', 'P', ' '): { + store_chunk = !!(dmux->feature_flags_ & XMP_FLAG); + goto Skip; + } + Skip: + default: { + if (chunk_size_padded <= MemDataSize(mem)) { + if (store_chunk) { + // Store only the chunk header and unpadded size as only the payload + // will be returned to the user. + if (!StoreChunk(dmux, chunk_start_offset, + CHUNK_HEADER_SIZE + chunk_size)) { + return PARSE_ERROR; + } + } + Skip(mem, chunk_size_padded); + } else { + status = PARSE_NEED_MORE_DATA; + } + } + } + + if (mem->start_ == mem->riff_end_) { + break; + } else if (MemDataSize(mem) < CHUNK_HEADER_SIZE) { + status = PARSE_NEED_MORE_DATA; + } + } while (status == PARSE_OK); + + return status; +} + +static ParseStatus ParseVP8X(WebPDemuxer* const dmux) { + MemBuffer* const mem = &dmux->mem_; + uint32_t vp8x_size; + + if (MemDataSize(mem) < CHUNK_HEADER_SIZE) return PARSE_NEED_MORE_DATA; + + dmux->is_ext_format_ = 1; + Skip(mem, TAG_SIZE); // VP8X + vp8x_size = ReadLE32(mem); + if (vp8x_size > MAX_CHUNK_PAYLOAD) return PARSE_ERROR; + if (vp8x_size < VP8X_CHUNK_SIZE) return PARSE_ERROR; + vp8x_size += vp8x_size & 1; + if (SizeIsInvalid(mem, vp8x_size)) return PARSE_ERROR; + if (MemDataSize(mem) < vp8x_size) return PARSE_NEED_MORE_DATA; + + dmux->feature_flags_ = ReadByte(mem); + Skip(mem, 3); // Reserved. + dmux->canvas_width_ = 1 + ReadLE24s(mem); + dmux->canvas_height_ = 1 + ReadLE24s(mem); + if (dmux->canvas_width_ * (uint64_t)dmux->canvas_height_ >= MAX_IMAGE_AREA) { + return PARSE_ERROR; // image final dimension is too large + } + Skip(mem, vp8x_size - VP8X_CHUNK_SIZE); // skip any trailing data. + dmux->state_ = WEBP_DEMUX_PARSED_HEADER; + + if (SizeIsInvalid(mem, CHUNK_HEADER_SIZE)) return PARSE_ERROR; + if (MemDataSize(mem) < CHUNK_HEADER_SIZE) return PARSE_NEED_MORE_DATA; + + return ParseVP8XChunks(dmux); +} + +// ----------------------------------------------------------------------------- +// Format validation + +static int IsValidSimpleFormat(const WebPDemuxer* const dmux) { + const Frame* const frame = dmux->frames_; + if (dmux->state_ == WEBP_DEMUX_PARSING_HEADER) return 1; + + if (dmux->canvas_width_ <= 0 || dmux->canvas_height_ <= 0) return 0; + if (dmux->state_ == WEBP_DEMUX_DONE && frame == NULL) return 0; + + if (frame->width_ <= 0 || frame->height_ <= 0) return 0; + return 1; +} + +// If 'exact' is true, check that the image resolution matches the canvas. +// If 'exact' is false, check that the x/y offsets do not exceed the canvas. +static int CheckFrameBounds(const Frame* const frame, int exact, + int canvas_width, int canvas_height) { + if (exact) { + if (frame->x_offset_ != 0 || frame->y_offset_ != 0) { + return 0; + } + if (frame->width_ != canvas_width || frame->height_ != canvas_height) { + return 0; + } + } else { + if (frame->x_offset_ < 0 || frame->y_offset_ < 0) return 0; + if (frame->width_ + frame->x_offset_ > canvas_width) return 0; + if (frame->height_ + frame->y_offset_ > canvas_height) return 0; + } + return 1; +} + +static int IsValidExtendedFormat(const WebPDemuxer* const dmux) { + const int is_animation = !!(dmux->feature_flags_ & ANIMATION_FLAG); + const int is_fragmented = !!(dmux->feature_flags_ & FRAGMENTS_FLAG); + const Frame* f = dmux->frames_; + + if (dmux->state_ == WEBP_DEMUX_PARSING_HEADER) return 1; + + if (dmux->canvas_width_ <= 0 || dmux->canvas_height_ <= 0) return 0; + if (dmux->loop_count_ < 0) return 0; + if (dmux->state_ == WEBP_DEMUX_DONE && dmux->frames_ == NULL) return 0; + if (is_fragmented) return 0; + + while (f != NULL) { + const int cur_frame_set = f->frame_num_; + int frame_count = 0; + + // Check frame properties. + for (; f != NULL && f->frame_num_ == cur_frame_set; f = f->next_) { + const ChunkData* const image = f->img_components_; + const ChunkData* const alpha = f->img_components_ + 1; + + if (!is_animation && f->frame_num_ > 1) return 0; + + if (f->complete_) { + if (alpha->size_ == 0 && image->size_ == 0) return 0; + // Ensure alpha precedes image bitstream. + if (alpha->size_ > 0 && alpha->offset_ > image->offset_) { + return 0; + } + + if (f->width_ <= 0 || f->height_ <= 0) return 0; + } else { + // There shouldn't be a partial frame in a complete file. + if (dmux->state_ == WEBP_DEMUX_DONE) return 0; + + // Ensure alpha precedes image bitstream. + if (alpha->size_ > 0 && image->size_ > 0 && + alpha->offset_ > image->offset_) { + return 0; + } + // There shouldn't be any frames after an incomplete one. + if (f->next_ != NULL) return 0; + } + + if (f->width_ > 0 && f->height_ > 0 && + !CheckFrameBounds(f, !is_animation, + dmux->canvas_width_, dmux->canvas_height_)) { + return 0; + } + + ++frame_count; + } + } + return 1; +} + +// ----------------------------------------------------------------------------- +// WebPDemuxer object + +static void InitDemux(WebPDemuxer* const dmux, const MemBuffer* const mem) { + dmux->state_ = WEBP_DEMUX_PARSING_HEADER; + dmux->loop_count_ = 1; + dmux->bgcolor_ = 0xFFFFFFFF; // White background by default. + dmux->canvas_width_ = -1; + dmux->canvas_height_ = -1; + dmux->frames_tail_ = &dmux->frames_; + dmux->chunks_tail_ = &dmux->chunks_; + dmux->mem_ = *mem; +} + +static ParseStatus CreateRawImageDemuxer(MemBuffer* const mem, + WebPDemuxer** demuxer) { + WebPBitstreamFeatures features; + const VP8StatusCode status = + WebPGetFeatures(mem->buf_, mem->buf_size_, &features); + *demuxer = NULL; + if (status != VP8_STATUS_OK) { + return (status == VP8_STATUS_NOT_ENOUGH_DATA) ? PARSE_NEED_MORE_DATA + : PARSE_ERROR; + } + + { + WebPDemuxer* const dmux = (WebPDemuxer*)WebPSafeCalloc(1ULL, sizeof(*dmux)); + Frame* const frame = (Frame*)WebPSafeCalloc(1ULL, sizeof(*frame)); + if (dmux == NULL || frame == NULL) goto Error; + InitDemux(dmux, mem); + SetFrameInfo(0, mem->buf_size_, 1 /*frame_num*/, 1 /*complete*/, &features, + frame); + if (!AddFrame(dmux, frame)) goto Error; + dmux->state_ = WEBP_DEMUX_DONE; + dmux->canvas_width_ = frame->width_; + dmux->canvas_height_ = frame->height_; + dmux->feature_flags_ |= frame->has_alpha_ ? ALPHA_FLAG : 0; + dmux->num_frames_ = 1; + assert(IsValidSimpleFormat(dmux)); + *demuxer = dmux; + return PARSE_OK; + + Error: + WebPSafeFree(dmux); + WebPSafeFree(frame); + return PARSE_ERROR; + } +} + +WebPDemuxer* WebPDemuxInternal(const WebPData* data, int allow_partial, + WebPDemuxState* state, int version) { + const ChunkParser* parser; + int partial; + ParseStatus status = PARSE_ERROR; + MemBuffer mem; + WebPDemuxer* dmux; + + if (state != NULL) *state = WEBP_DEMUX_PARSE_ERROR; + + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_DEMUX_ABI_VERSION)) return NULL; + if (data == NULL || data->bytes == NULL || data->size == 0) return NULL; + + if (!InitMemBuffer(&mem, data->bytes, data->size)) return NULL; + status = ReadHeader(&mem); + if (status != PARSE_OK) { + // If parsing of the webp file header fails attempt to handle a raw + // VP8/VP8L frame. Note 'allow_partial' is ignored in this case. + if (status == PARSE_ERROR) { + status = CreateRawImageDemuxer(&mem, &dmux); + if (status == PARSE_OK) { + if (state != NULL) *state = WEBP_DEMUX_DONE; + return dmux; + } + } + if (state != NULL) { + *state = (status == PARSE_NEED_MORE_DATA) ? WEBP_DEMUX_PARSING_HEADER + : WEBP_DEMUX_PARSE_ERROR; + } + return NULL; + } + + partial = (mem.buf_size_ < mem.riff_end_); + if (!allow_partial && partial) return NULL; + + dmux = (WebPDemuxer*)WebPSafeCalloc(1ULL, sizeof(*dmux)); + if (dmux == NULL) return NULL; + InitDemux(dmux, &mem); + + status = PARSE_ERROR; + for (parser = kMasterChunks; parser->parse != NULL; ++parser) { + if (!memcmp(parser->id, GetBuffer(&dmux->mem_), TAG_SIZE)) { + status = parser->parse(dmux); + if (status == PARSE_OK) dmux->state_ = WEBP_DEMUX_DONE; + if (status == PARSE_NEED_MORE_DATA && !partial) status = PARSE_ERROR; + if (status != PARSE_ERROR && !parser->valid(dmux)) status = PARSE_ERROR; + if (status == PARSE_ERROR) dmux->state_ = WEBP_DEMUX_PARSE_ERROR; + break; + } + } + if (state != NULL) *state = dmux->state_; + + if (status == PARSE_ERROR) { + WebPDemuxDelete(dmux); + return NULL; + } + return dmux; +} + +void WebPDemuxDelete(WebPDemuxer* dmux) { + Chunk* c; + Frame* f; + if (dmux == NULL) return; + + for (f = dmux->frames_; f != NULL;) { + Frame* const cur_frame = f; + f = f->next_; + WebPSafeFree(cur_frame); + } + for (c = dmux->chunks_; c != NULL;) { + Chunk* const cur_chunk = c; + c = c->next_; + WebPSafeFree(cur_chunk); + } + WebPSafeFree(dmux); +} + +// ----------------------------------------------------------------------------- + +uint32_t WebPDemuxGetI(const WebPDemuxer* dmux, WebPFormatFeature feature) { + if (dmux == NULL) return 0; + + switch (feature) { + case WEBP_FF_FORMAT_FLAGS: return dmux->feature_flags_; + case WEBP_FF_CANVAS_WIDTH: return (uint32_t)dmux->canvas_width_; + case WEBP_FF_CANVAS_HEIGHT: return (uint32_t)dmux->canvas_height_; + case WEBP_FF_LOOP_COUNT: return (uint32_t)dmux->loop_count_; + case WEBP_FF_BACKGROUND_COLOR: return dmux->bgcolor_; + case WEBP_FF_FRAME_COUNT: return (uint32_t)dmux->num_frames_; + } + return 0; +} + +// ----------------------------------------------------------------------------- +// Frame iteration + +static const Frame* GetFrame(const WebPDemuxer* const dmux, int frame_num) { + const Frame* f; + for (f = dmux->frames_; f != NULL; f = f->next_) { + if (frame_num == f->frame_num_) break; + } + return f; +} + +static const uint8_t* GetFramePayload(const uint8_t* const mem_buf, + const Frame* const frame, + size_t* const data_size) { + *data_size = 0; + if (frame != NULL) { + const ChunkData* const image = frame->img_components_; + const ChunkData* const alpha = frame->img_components_ + 1; + size_t start_offset = image->offset_; + *data_size = image->size_; + + // if alpha exists it precedes image, update the size allowing for + // intervening chunks. + if (alpha->size_ > 0) { + const size_t inter_size = (image->offset_ > 0) + ? image->offset_ - (alpha->offset_ + alpha->size_) + : 0; + start_offset = alpha->offset_; + *data_size += alpha->size_ + inter_size; + } + return mem_buf + start_offset; + } + return NULL; +} + +// Create a whole 'frame' from VP8 (+ alpha) or lossless. +static int SynthesizeFrame(const WebPDemuxer* const dmux, + const Frame* const frame, + WebPIterator* const iter) { + const uint8_t* const mem_buf = dmux->mem_.buf_; + size_t payload_size = 0; + const uint8_t* const payload = GetFramePayload(mem_buf, frame, &payload_size); + if (payload == NULL) return 0; + assert(frame != NULL); + + iter->frame_num = frame->frame_num_; + iter->num_frames = dmux->num_frames_; + iter->x_offset = frame->x_offset_; + iter->y_offset = frame->y_offset_; + iter->width = frame->width_; + iter->height = frame->height_; + iter->has_alpha = frame->has_alpha_; + iter->duration = frame->duration_; + iter->dispose_method = frame->dispose_method_; + iter->blend_method = frame->blend_method_; + iter->complete = frame->complete_; + iter->fragment.bytes = payload; + iter->fragment.size = payload_size; + return 1; +} + +static int SetFrame(int frame_num, WebPIterator* const iter) { + const Frame* frame; + const WebPDemuxer* const dmux = (WebPDemuxer*)iter->private_; + if (dmux == NULL || frame_num < 0) return 0; + if (frame_num > dmux->num_frames_) return 0; + if (frame_num == 0) frame_num = dmux->num_frames_; + + frame = GetFrame(dmux, frame_num); + if (frame == NULL) return 0; + + return SynthesizeFrame(dmux, frame, iter); +} + +int WebPDemuxGetFrame(const WebPDemuxer* dmux, int frame, WebPIterator* iter) { + if (iter == NULL) return 0; + + memset(iter, 0, sizeof(*iter)); + iter->private_ = (void*)dmux; + return SetFrame(frame, iter); +} + +int WebPDemuxNextFrame(WebPIterator* iter) { + if (iter == NULL) return 0; + return SetFrame(iter->frame_num + 1, iter); +} + +int WebPDemuxPrevFrame(WebPIterator* iter) { + if (iter == NULL) return 0; + if (iter->frame_num <= 1) return 0; + return SetFrame(iter->frame_num - 1, iter); +} + +void WebPDemuxReleaseIterator(WebPIterator* iter) { + (void)iter; +} + +// ----------------------------------------------------------------------------- +// Chunk iteration + +static int ChunkCount(const WebPDemuxer* const dmux, const char fourcc[4]) { + const uint8_t* const mem_buf = dmux->mem_.buf_; + const Chunk* c; + int count = 0; + for (c = dmux->chunks_; c != NULL; c = c->next_) { + const uint8_t* const header = mem_buf + c->data_.offset_; + if (!memcmp(header, fourcc, TAG_SIZE)) ++count; + } + return count; +} + +static const Chunk* GetChunk(const WebPDemuxer* const dmux, + const char fourcc[4], int chunk_num) { + const uint8_t* const mem_buf = dmux->mem_.buf_; + const Chunk* c; + int count = 0; + for (c = dmux->chunks_; c != NULL; c = c->next_) { + const uint8_t* const header = mem_buf + c->data_.offset_; + if (!memcmp(header, fourcc, TAG_SIZE)) ++count; + if (count == chunk_num) break; + } + return c; +} + +static int SetChunk(const char fourcc[4], int chunk_num, + WebPChunkIterator* const iter) { + const WebPDemuxer* const dmux = (WebPDemuxer*)iter->private_; + int count; + + if (dmux == NULL || fourcc == NULL || chunk_num < 0) return 0; + count = ChunkCount(dmux, fourcc); + if (count == 0) return 0; + if (chunk_num == 0) chunk_num = count; + + if (chunk_num <= count) { + const uint8_t* const mem_buf = dmux->mem_.buf_; + const Chunk* const chunk = GetChunk(dmux, fourcc, chunk_num); + iter->chunk.bytes = mem_buf + chunk->data_.offset_ + CHUNK_HEADER_SIZE; + iter->chunk.size = chunk->data_.size_ - CHUNK_HEADER_SIZE; + iter->num_chunks = count; + iter->chunk_num = chunk_num; + return 1; + } + return 0; +} + +int WebPDemuxGetChunk(const WebPDemuxer* dmux, + const char fourcc[4], int chunk_num, + WebPChunkIterator* iter) { + if (iter == NULL) return 0; + + memset(iter, 0, sizeof(*iter)); + iter->private_ = (void*)dmux; + return SetChunk(fourcc, chunk_num, iter); +} + +int WebPDemuxNextChunk(WebPChunkIterator* iter) { + if (iter != NULL) { + const char* const fourcc = + (const char*)iter->chunk.bytes - CHUNK_HEADER_SIZE; + return SetChunk(fourcc, iter->chunk_num + 1, iter); + } + return 0; +} + +int WebPDemuxPrevChunk(WebPChunkIterator* iter) { + if (iter != NULL && iter->chunk_num > 1) { + const char* const fourcc = + (const char*)iter->chunk.bytes - CHUNK_HEADER_SIZE; + return SetChunk(fourcc, iter->chunk_num - 1, iter); + } + return 0; +} + +void WebPDemuxReleaseChunkIterator(WebPChunkIterator* iter) { + (void)iter; +} + diff --git a/thirdparty/libwebp/dsp/alpha_processing.c b/thirdparty/libwebp/dsp/alpha_processing.c new file mode 100644 index 0000000000..1716cace8d --- /dev/null +++ b/thirdparty/libwebp/dsp/alpha_processing.c @@ -0,0 +1,383 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// 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 processing transparent channel. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include "./dsp.h" + +// Tables can be faster on some platform but incur some extra binary size (~2k). +// #define USE_TABLES_FOR_ALPHA_MULT + +// ----------------------------------------------------------------------------- + +#define MFIX 24 // 24bit fixed-point arithmetic +#define HALF ((1u << MFIX) >> 1) +#define KINV_255 ((1u << MFIX) / 255u) + +static uint32_t Mult(uint8_t x, uint32_t mult) { + const uint32_t v = (x * mult + HALF) >> MFIX; + assert(v <= 255); // <- 24bit precision is enough to ensure that. + return v; +} + +#ifdef USE_TABLES_FOR_ALPHA_MULT + +static const uint32_t kMultTables[2][256] = { + { // (255u << MFIX) / alpha + 0x00000000, 0xff000000, 0x7f800000, 0x55000000, 0x3fc00000, 0x33000000, + 0x2a800000, 0x246db6db, 0x1fe00000, 0x1c555555, 0x19800000, 0x172e8ba2, + 0x15400000, 0x139d89d8, 0x1236db6d, 0x11000000, 0x0ff00000, 0x0f000000, + 0x0e2aaaaa, 0x0d6bca1a, 0x0cc00000, 0x0c249249, 0x0b9745d1, 0x0b1642c8, + 0x0aa00000, 0x0a333333, 0x09cec4ec, 0x0971c71c, 0x091b6db6, 0x08cb08d3, + 0x08800000, 0x0839ce73, 0x07f80000, 0x07ba2e8b, 0x07800000, 0x07492492, + 0x07155555, 0x06e45306, 0x06b5e50d, 0x0689d89d, 0x06600000, 0x063831f3, + 0x06124924, 0x05ee23b8, 0x05cba2e8, 0x05aaaaaa, 0x058b2164, 0x056cefa8, + 0x05500000, 0x05343eb1, 0x05199999, 0x05000000, 0x04e76276, 0x04cfb2b7, + 0x04b8e38e, 0x04a2e8ba, 0x048db6db, 0x0479435e, 0x04658469, 0x045270d0, + 0x04400000, 0x042e29f7, 0x041ce739, 0x040c30c3, 0x03fc0000, 0x03ec4ec4, + 0x03dd1745, 0x03ce540f, 0x03c00000, 0x03b21642, 0x03a49249, 0x03976fc6, + 0x038aaaaa, 0x037e3f1f, 0x03722983, 0x03666666, 0x035af286, 0x034fcace, + 0x0344ec4e, 0x033a5440, 0x03300000, 0x0325ed09, 0x031c18f9, 0x0312818a, + 0x03092492, 0x03000000, 0x02f711dc, 0x02ee5846, 0x02e5d174, 0x02dd7baf, + 0x02d55555, 0x02cd5cd5, 0x02c590b2, 0x02bdef7b, 0x02b677d4, 0x02af286b, + 0x02a80000, 0x02a0fd5c, 0x029a1f58, 0x029364d9, 0x028ccccc, 0x0286562d, + 0x02800000, 0x0279c952, 0x0273b13b, 0x026db6db, 0x0267d95b, 0x026217ec, + 0x025c71c7, 0x0256e62a, 0x0251745d, 0x024c1bac, 0x0246db6d, 0x0241b2f9, + 0x023ca1af, 0x0237a6f4, 0x0232c234, 0x022df2df, 0x02293868, 0x02249249, + 0x02200000, 0x021b810e, 0x021714fb, 0x0212bb51, 0x020e739c, 0x020a3d70, + 0x02061861, 0x02020408, 0x01fe0000, 0x01fa0be8, 0x01f62762, 0x01f25213, + 0x01ee8ba2, 0x01ead3ba, 0x01e72a07, 0x01e38e38, 0x01e00000, 0x01dc7f10, + 0x01d90b21, 0x01d5a3e9, 0x01d24924, 0x01cefa8d, 0x01cbb7e3, 0x01c880e5, + 0x01c55555, 0x01c234f7, 0x01bf1f8f, 0x01bc14e5, 0x01b914c1, 0x01b61eed, + 0x01b33333, 0x01b05160, 0x01ad7943, 0x01aaaaaa, 0x01a7e567, 0x01a5294a, + 0x01a27627, 0x019fcbd2, 0x019d2a20, 0x019a90e7, 0x01980000, 0x01957741, + 0x0192f684, 0x01907da4, 0x018e0c7c, 0x018ba2e8, 0x018940c5, 0x0186e5f0, + 0x01849249, 0x018245ae, 0x01800000, 0x017dc11f, 0x017b88ee, 0x0179574e, + 0x01772c23, 0x01750750, 0x0172e8ba, 0x0170d045, 0x016ebdd7, 0x016cb157, + 0x016aaaaa, 0x0168a9b9, 0x0166ae6a, 0x0164b8a7, 0x0162c859, 0x0160dd67, + 0x015ef7bd, 0x015d1745, 0x015b3bea, 0x01596596, 0x01579435, 0x0155c7b4, + 0x01540000, 0x01523d03, 0x01507eae, 0x014ec4ec, 0x014d0fac, 0x014b5edc, + 0x0149b26c, 0x01480a4a, 0x01466666, 0x0144c6af, 0x01432b16, 0x0141938b, + 0x01400000, 0x013e7063, 0x013ce4a9, 0x013b5cc0, 0x0139d89d, 0x01385830, + 0x0136db6d, 0x01356246, 0x0133ecad, 0x01327a97, 0x01310bf6, 0x012fa0be, + 0x012e38e3, 0x012cd459, 0x012b7315, 0x012a150a, 0x0128ba2e, 0x01276276, + 0x01260dd6, 0x0124bc44, 0x01236db6, 0x01222222, 0x0120d97c, 0x011f93bc, + 0x011e50d7, 0x011d10c4, 0x011bd37a, 0x011a98ef, 0x0119611a, 0x01182bf2, + 0x0116f96f, 0x0115c988, 0x01149c34, 0x0113716a, 0x01124924, 0x01112358, + 0x01100000, 0x010edf12, 0x010dc087, 0x010ca458, 0x010b8a7d, 0x010a72f0, + 0x01095da8, 0x01084a9f, 0x010739ce, 0x01062b2e, 0x01051eb8, 0x01041465, + 0x01030c30, 0x01020612, 0x01010204, 0x01000000 }, + { // alpha * KINV_255 + 0x00000000, 0x00010101, 0x00020202, 0x00030303, 0x00040404, 0x00050505, + 0x00060606, 0x00070707, 0x00080808, 0x00090909, 0x000a0a0a, 0x000b0b0b, + 0x000c0c0c, 0x000d0d0d, 0x000e0e0e, 0x000f0f0f, 0x00101010, 0x00111111, + 0x00121212, 0x00131313, 0x00141414, 0x00151515, 0x00161616, 0x00171717, + 0x00181818, 0x00191919, 0x001a1a1a, 0x001b1b1b, 0x001c1c1c, 0x001d1d1d, + 0x001e1e1e, 0x001f1f1f, 0x00202020, 0x00212121, 0x00222222, 0x00232323, + 0x00242424, 0x00252525, 0x00262626, 0x00272727, 0x00282828, 0x00292929, + 0x002a2a2a, 0x002b2b2b, 0x002c2c2c, 0x002d2d2d, 0x002e2e2e, 0x002f2f2f, + 0x00303030, 0x00313131, 0x00323232, 0x00333333, 0x00343434, 0x00353535, + 0x00363636, 0x00373737, 0x00383838, 0x00393939, 0x003a3a3a, 0x003b3b3b, + 0x003c3c3c, 0x003d3d3d, 0x003e3e3e, 0x003f3f3f, 0x00404040, 0x00414141, + 0x00424242, 0x00434343, 0x00444444, 0x00454545, 0x00464646, 0x00474747, + 0x00484848, 0x00494949, 0x004a4a4a, 0x004b4b4b, 0x004c4c4c, 0x004d4d4d, + 0x004e4e4e, 0x004f4f4f, 0x00505050, 0x00515151, 0x00525252, 0x00535353, + 0x00545454, 0x00555555, 0x00565656, 0x00575757, 0x00585858, 0x00595959, + 0x005a5a5a, 0x005b5b5b, 0x005c5c5c, 0x005d5d5d, 0x005e5e5e, 0x005f5f5f, + 0x00606060, 0x00616161, 0x00626262, 0x00636363, 0x00646464, 0x00656565, + 0x00666666, 0x00676767, 0x00686868, 0x00696969, 0x006a6a6a, 0x006b6b6b, + 0x006c6c6c, 0x006d6d6d, 0x006e6e6e, 0x006f6f6f, 0x00707070, 0x00717171, + 0x00727272, 0x00737373, 0x00747474, 0x00757575, 0x00767676, 0x00777777, + 0x00787878, 0x00797979, 0x007a7a7a, 0x007b7b7b, 0x007c7c7c, 0x007d7d7d, + 0x007e7e7e, 0x007f7f7f, 0x00808080, 0x00818181, 0x00828282, 0x00838383, + 0x00848484, 0x00858585, 0x00868686, 0x00878787, 0x00888888, 0x00898989, + 0x008a8a8a, 0x008b8b8b, 0x008c8c8c, 0x008d8d8d, 0x008e8e8e, 0x008f8f8f, + 0x00909090, 0x00919191, 0x00929292, 0x00939393, 0x00949494, 0x00959595, + 0x00969696, 0x00979797, 0x00989898, 0x00999999, 0x009a9a9a, 0x009b9b9b, + 0x009c9c9c, 0x009d9d9d, 0x009e9e9e, 0x009f9f9f, 0x00a0a0a0, 0x00a1a1a1, + 0x00a2a2a2, 0x00a3a3a3, 0x00a4a4a4, 0x00a5a5a5, 0x00a6a6a6, 0x00a7a7a7, + 0x00a8a8a8, 0x00a9a9a9, 0x00aaaaaa, 0x00ababab, 0x00acacac, 0x00adadad, + 0x00aeaeae, 0x00afafaf, 0x00b0b0b0, 0x00b1b1b1, 0x00b2b2b2, 0x00b3b3b3, + 0x00b4b4b4, 0x00b5b5b5, 0x00b6b6b6, 0x00b7b7b7, 0x00b8b8b8, 0x00b9b9b9, + 0x00bababa, 0x00bbbbbb, 0x00bcbcbc, 0x00bdbdbd, 0x00bebebe, 0x00bfbfbf, + 0x00c0c0c0, 0x00c1c1c1, 0x00c2c2c2, 0x00c3c3c3, 0x00c4c4c4, 0x00c5c5c5, + 0x00c6c6c6, 0x00c7c7c7, 0x00c8c8c8, 0x00c9c9c9, 0x00cacaca, 0x00cbcbcb, + 0x00cccccc, 0x00cdcdcd, 0x00cecece, 0x00cfcfcf, 0x00d0d0d0, 0x00d1d1d1, + 0x00d2d2d2, 0x00d3d3d3, 0x00d4d4d4, 0x00d5d5d5, 0x00d6d6d6, 0x00d7d7d7, + 0x00d8d8d8, 0x00d9d9d9, 0x00dadada, 0x00dbdbdb, 0x00dcdcdc, 0x00dddddd, + 0x00dedede, 0x00dfdfdf, 0x00e0e0e0, 0x00e1e1e1, 0x00e2e2e2, 0x00e3e3e3, + 0x00e4e4e4, 0x00e5e5e5, 0x00e6e6e6, 0x00e7e7e7, 0x00e8e8e8, 0x00e9e9e9, + 0x00eaeaea, 0x00ebebeb, 0x00ececec, 0x00ededed, 0x00eeeeee, 0x00efefef, + 0x00f0f0f0, 0x00f1f1f1, 0x00f2f2f2, 0x00f3f3f3, 0x00f4f4f4, 0x00f5f5f5, + 0x00f6f6f6, 0x00f7f7f7, 0x00f8f8f8, 0x00f9f9f9, 0x00fafafa, 0x00fbfbfb, + 0x00fcfcfc, 0x00fdfdfd, 0x00fefefe, 0x00ffffff } +}; + +static WEBP_INLINE uint32_t GetScale(uint32_t a, int inverse) { + return kMultTables[!inverse][a]; +} + +#else + +static WEBP_INLINE uint32_t GetScale(uint32_t a, int inverse) { + return inverse ? (255u << MFIX) / a : a * KINV_255; +} + +#endif // USE_TABLES_FOR_ALPHA_MULT + +void WebPMultARGBRowC(uint32_t* const ptr, int width, int inverse) { + int x; + for (x = 0; x < width; ++x) { + const uint32_t argb = ptr[x]; + if (argb < 0xff000000u) { // alpha < 255 + if (argb <= 0x00ffffffu) { // alpha == 0 + ptr[x] = 0; + } else { + const uint32_t alpha = (argb >> 24) & 0xff; + const uint32_t scale = GetScale(alpha, inverse); + uint32_t out = argb & 0xff000000u; + out |= Mult(argb >> 0, scale) << 0; + out |= Mult(argb >> 8, scale) << 8; + out |= Mult(argb >> 16, scale) << 16; + ptr[x] = out; + } + } + } +} + +void WebPMultRowC(uint8_t* const ptr, const uint8_t* const alpha, + int width, int inverse) { + int x; + for (x = 0; x < width; ++x) { + const uint32_t a = alpha[x]; + if (a != 255) { + if (a == 0) { + ptr[x] = 0; + } else { + const uint32_t scale = GetScale(a, inverse); + ptr[x] = Mult(ptr[x], scale); + } + } + } +} + +#undef KINV_255 +#undef HALF +#undef MFIX + +void (*WebPMultARGBRow)(uint32_t* const ptr, int width, int inverse); +void (*WebPMultRow)(uint8_t* const ptr, const uint8_t* const alpha, + int width, int inverse); + +//------------------------------------------------------------------------------ +// Generic per-plane calls + +void WebPMultARGBRows(uint8_t* ptr, int stride, int width, int num_rows, + int inverse) { + int n; + for (n = 0; n < num_rows; ++n) { + WebPMultARGBRow((uint32_t*)ptr, width, inverse); + ptr += stride; + } +} + +void WebPMultRows(uint8_t* ptr, int stride, + const uint8_t* alpha, int alpha_stride, + int width, int num_rows, int inverse) { + int n; + for (n = 0; n < num_rows; ++n) { + WebPMultRow(ptr, alpha, width, inverse); + ptr += stride; + alpha += alpha_stride; + } +} + +//------------------------------------------------------------------------------ +// 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) * 32897U) +#define PREMULTIPLY(x, m) (((x) * (m)) >> 23) +#else // (int)(x * a / 255. + .5) +#define MULTIPLIER(a) ((a) * 65793U) +#define PREMULTIPLY(x, m) (((x) * (m) + (1U << 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 WEBP_INLINE void ApplyAlphaMultiply4444(uint8_t* rgba4444, + int w, int h, int stride, + int rg_byte_pos /* 0 or 1 */) { + while (h-- > 0) { + int i; + for (i = 0; i < w; ++i) { + const uint32_t rg = rgba4444[2 * i + rg_byte_pos]; + const uint32_t ba = rgba4444[2 * i + (rg_byte_pos ^ 1)]; + const uint8_t a = ba & 0x0f; + const uint32_t mult = MULTIPLIER(a); + const uint8_t r = multiply(dither_hi(rg), mult); + const uint8_t g = multiply(dither_lo(rg), mult); + const uint8_t b = multiply(dither_hi(ba), mult); + rgba4444[2 * i + rg_byte_pos] = (r & 0xf0) | ((g >> 4) & 0x0f); + rgba4444[2 * i + (rg_byte_pos ^ 1)] = (b & 0xf0) | a; + } + rgba4444 += stride; + } +} +#undef MULTIPLIER + +static void ApplyAlphaMultiply_16b(uint8_t* rgba4444, + int w, int h, int stride) { +#ifdef WEBP_SWAP_16BIT_CSP + ApplyAlphaMultiply4444(rgba4444, w, h, stride, 1); +#else + ApplyAlphaMultiply4444(rgba4444, w, h, stride, 0); +#endif +} + +static int DispatchAlpha(const uint8_t* alpha, int alpha_stride, + int width, int height, + uint8_t* dst, int dst_stride) { + uint32_t alpha_mask = 0xff; + int i, j; + + for (j = 0; j < height; ++j) { + for (i = 0; i < width; ++i) { + const uint32_t alpha_value = alpha[i]; + dst[4 * i] = alpha_value; + alpha_mask &= alpha_value; + } + alpha += alpha_stride; + dst += dst_stride; + } + + return (alpha_mask != 0xff); +} + +static void DispatchAlphaToGreen(const uint8_t* alpha, int alpha_stride, + int width, int height, + uint32_t* dst, int dst_stride) { + int i, j; + for (j = 0; j < height; ++j) { + for (i = 0; i < width; ++i) { + dst[i] = alpha[i] << 8; // leave A/R/B channels zero'd. + } + alpha += alpha_stride; + dst += dst_stride; + } +} + +static int ExtractAlpha(const uint8_t* argb, int argb_stride, + int width, int height, + uint8_t* alpha, int alpha_stride) { + uint8_t alpha_mask = 0xff; + int i, j; + + for (j = 0; j < height; ++j) { + for (i = 0; i < width; ++i) { + const uint8_t alpha_value = argb[4 * i]; + alpha[i] = alpha_value; + alpha_mask &= alpha_value; + } + argb += argb_stride; + alpha += alpha_stride; + } + return (alpha_mask == 0xff); +} + +void (*WebPApplyAlphaMultiply)(uint8_t*, int, int, int, int); +void (*WebPApplyAlphaMultiply4444)(uint8_t*, int, int, int); +int (*WebPDispatchAlpha)(const uint8_t*, int, int, int, uint8_t*, int); +void (*WebPDispatchAlphaToGreen)(const uint8_t*, int, int, int, uint32_t*, int); +int (*WebPExtractAlpha)(const uint8_t*, int, int, int, uint8_t*, int); + +//------------------------------------------------------------------------------ +// Init function + +extern void WebPInitAlphaProcessingMIPSdspR2(void); +extern void WebPInitAlphaProcessingSSE2(void); +extern void WebPInitAlphaProcessingSSE41(void); + +static volatile VP8CPUInfo alpha_processing_last_cpuinfo_used = + (VP8CPUInfo)&alpha_processing_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitAlphaProcessing(void) { + if (alpha_processing_last_cpuinfo_used == VP8GetCPUInfo) return; + + WebPMultARGBRow = WebPMultARGBRowC; + WebPMultRow = WebPMultRowC; + WebPApplyAlphaMultiply = ApplyAlphaMultiply; + WebPApplyAlphaMultiply4444 = ApplyAlphaMultiply_16b; + WebPDispatchAlpha = DispatchAlpha; + WebPDispatchAlphaToGreen = DispatchAlphaToGreen; + WebPExtractAlpha = ExtractAlpha; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitAlphaProcessingSSE2(); +#if defined(WEBP_USE_SSE41) + if (VP8GetCPUInfo(kSSE4_1)) { + WebPInitAlphaProcessingSSE41(); + } +#endif + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + WebPInitAlphaProcessingMIPSdspR2(); + } +#endif + } + alpha_processing_last_cpuinfo_used = VP8GetCPUInfo; +} diff --git a/thirdparty/libwebp/dsp/alpha_processing_mips_dsp_r2.c b/thirdparty/libwebp/dsp/alpha_processing_mips_dsp_r2.c new file mode 100644 index 0000000000..c631d78905 --- /dev/null +++ b/thirdparty/libwebp/dsp/alpha_processing_mips_dsp_r2.c @@ -0,0 +1,141 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 processing transparent channel. +// +// Author(s): Branimir Vasic (branimir.vasic@imgtec.com) +// Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +static int DispatchAlpha(const uint8_t* alpha, int alpha_stride, + int width, int height, + uint8_t* dst, int dst_stride) { + uint32_t alpha_mask = 0xffffffff; + int i, j, temp0; + + for (j = 0; j < height; ++j) { + uint8_t* pdst = dst; + const uint8_t* palpha = alpha; + for (i = 0; i < (width >> 2); ++i) { + int temp1, temp2, temp3; + + __asm__ volatile ( + "ulw %[temp0], 0(%[palpha]) \n\t" + "addiu %[palpha], %[palpha], 4 \n\t" + "addiu %[pdst], %[pdst], 16 \n\t" + "srl %[temp1], %[temp0], 8 \n\t" + "srl %[temp2], %[temp0], 16 \n\t" + "srl %[temp3], %[temp0], 24 \n\t" + "and %[alpha_mask], %[alpha_mask], %[temp0] \n\t" + "sb %[temp0], -16(%[pdst]) \n\t" + "sb %[temp1], -12(%[pdst]) \n\t" + "sb %[temp2], -8(%[pdst]) \n\t" + "sb %[temp3], -4(%[pdst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [palpha]"+r"(palpha), [pdst]"+r"(pdst), + [alpha_mask]"+r"(alpha_mask) + : + : "memory" + ); + } + + for (i = 0; i < (width & 3); ++i) { + __asm__ volatile ( + "lbu %[temp0], 0(%[palpha]) \n\t" + "addiu %[palpha], %[palpha], 1 \n\t" + "sb %[temp0], 0(%[pdst]) \n\t" + "and %[alpha_mask], %[alpha_mask], %[temp0] \n\t" + "addiu %[pdst], %[pdst], 4 \n\t" + : [temp0]"=&r"(temp0), [palpha]"+r"(palpha), [pdst]"+r"(pdst), + [alpha_mask]"+r"(alpha_mask) + : + : "memory" + ); + } + alpha += alpha_stride; + dst += dst_stride; + } + + __asm__ volatile ( + "ext %[temp0], %[alpha_mask], 0, 16 \n\t" + "srl %[alpha_mask], %[alpha_mask], 16 \n\t" + "and %[alpha_mask], %[alpha_mask], %[temp0] \n\t" + "ext %[temp0], %[alpha_mask], 0, 8 \n\t" + "srl %[alpha_mask], %[alpha_mask], 8 \n\t" + "and %[alpha_mask], %[alpha_mask], %[temp0] \n\t" + : [temp0]"=&r"(temp0), [alpha_mask]"+r"(alpha_mask) + : + ); + + return (alpha_mask != 0xff); +} + +static void MultARGBRow(uint32_t* const ptr, int width, int inverse) { + int x; + const uint32_t c_00ffffff = 0x00ffffffu; + const uint32_t c_ff000000 = 0xff000000u; + const uint32_t c_8000000 = 0x00800000u; + const uint32_t c_8000080 = 0x00800080u; + for (x = 0; x < width; ++x) { + const uint32_t argb = ptr[x]; + if (argb < 0xff000000u) { // alpha < 255 + if (argb <= 0x00ffffffu) { // alpha == 0 + ptr[x] = 0; + } else { + int temp0, temp1, temp2, temp3, alpha; + __asm__ volatile ( + "srl %[alpha], %[argb], 24 \n\t" + "replv.qb %[temp0], %[alpha] \n\t" + "and %[temp0], %[temp0], %[c_00ffffff] \n\t" + "beqz %[inverse], 0f \n\t" + "divu $zero, %[c_ff000000], %[alpha] \n\t" + "mflo %[temp0] \n\t" + "0: \n\t" + "andi %[temp1], %[argb], 0xff \n\t" + "ext %[temp2], %[argb], 8, 8 \n\t" + "ext %[temp3], %[argb], 16, 8 \n\t" + "mul %[temp1], %[temp1], %[temp0] \n\t" + "mul %[temp2], %[temp2], %[temp0] \n\t" + "mul %[temp3], %[temp3], %[temp0] \n\t" + "precrq.ph.w %[temp1], %[temp2], %[temp1] \n\t" + "addu %[temp3], %[temp3], %[c_8000000] \n\t" + "addu %[temp1], %[temp1], %[c_8000080] \n\t" + "precrq.ph.w %[temp3], %[argb], %[temp3] \n\t" + "precrq.qb.ph %[temp1], %[temp3], %[temp1] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [alpha]"=&r"(alpha) + : [inverse]"r"(inverse), [c_00ffffff]"r"(c_00ffffff), + [c_8000000]"r"(c_8000000), [c_8000080]"r"(c_8000080), + [c_ff000000]"r"(c_ff000000), [argb]"r"(argb) + : "memory", "hi", "lo" + ); + ptr[x] = temp1; + } + } + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPInitAlphaProcessingMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitAlphaProcessingMIPSdspR2(void) { + WebPDispatchAlpha = DispatchAlpha; + WebPMultARGBRow = MultARGBRow; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(WebPInitAlphaProcessingMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/alpha_processing_sse2.c b/thirdparty/libwebp/dsp/alpha_processing_sse2.c new file mode 100644 index 0000000000..5acb481dcd --- /dev/null +++ b/thirdparty/libwebp/dsp/alpha_processing_sse2.c @@ -0,0 +1,298 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 processing transparent channel. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) +#include <emmintrin.h> + +//------------------------------------------------------------------------------ + +static int DispatchAlpha(const uint8_t* alpha, int alpha_stride, + int width, int height, + uint8_t* dst, int dst_stride) { + // alpha_and stores an 'and' operation of all the alpha[] values. The final + // value is not 0xff if any of the alpha[] is not equal to 0xff. + uint32_t alpha_and = 0xff; + int i, j; + const __m128i zero = _mm_setzero_si128(); + const __m128i rgb_mask = _mm_set1_epi32(0xffffff00u); // to preserve RGB + const __m128i all_0xff = _mm_set_epi32(0, 0, ~0u, ~0u); + __m128i all_alphas = all_0xff; + + // We must be able to access 3 extra bytes after the last written byte + // 'dst[4 * width - 4]', because we don't know if alpha is the first or the + // last byte of the quadruplet. + const int limit = (width - 1) & ~7; + + for (j = 0; j < height; ++j) { + __m128i* out = (__m128i*)dst; + for (i = 0; i < limit; i += 8) { + // load 8 alpha bytes + const __m128i a0 = _mm_loadl_epi64((const __m128i*)&alpha[i]); + const __m128i a1 = _mm_unpacklo_epi8(a0, zero); + const __m128i a2_lo = _mm_unpacklo_epi16(a1, zero); + const __m128i a2_hi = _mm_unpackhi_epi16(a1, zero); + // load 8 dst pixels (32 bytes) + const __m128i b0_lo = _mm_loadu_si128(out + 0); + const __m128i b0_hi = _mm_loadu_si128(out + 1); + // mask dst alpha values + const __m128i b1_lo = _mm_and_si128(b0_lo, rgb_mask); + const __m128i b1_hi = _mm_and_si128(b0_hi, rgb_mask); + // combine + const __m128i b2_lo = _mm_or_si128(b1_lo, a2_lo); + const __m128i b2_hi = _mm_or_si128(b1_hi, a2_hi); + // store + _mm_storeu_si128(out + 0, b2_lo); + _mm_storeu_si128(out + 1, b2_hi); + // accumulate eight alpha 'and' in parallel + all_alphas = _mm_and_si128(all_alphas, a0); + out += 2; + } + for (; i < width; ++i) { + const uint32_t alpha_value = alpha[i]; + dst[4 * i] = alpha_value; + alpha_and &= alpha_value; + } + alpha += alpha_stride; + dst += dst_stride; + } + // Combine the eight alpha 'and' into a 8-bit mask. + alpha_and &= _mm_movemask_epi8(_mm_cmpeq_epi8(all_alphas, all_0xff)); + return (alpha_and != 0xff); +} + +static void DispatchAlphaToGreen(const uint8_t* alpha, int alpha_stride, + int width, int height, + uint32_t* dst, int dst_stride) { + int i, j; + const __m128i zero = _mm_setzero_si128(); + const int limit = width & ~15; + for (j = 0; j < height; ++j) { + for (i = 0; i < limit; i += 16) { // process 16 alpha bytes + const __m128i a0 = _mm_loadu_si128((const __m128i*)&alpha[i]); + const __m128i a1 = _mm_unpacklo_epi8(zero, a0); // note the 'zero' first! + const __m128i b1 = _mm_unpackhi_epi8(zero, a0); + const __m128i a2_lo = _mm_unpacklo_epi16(a1, zero); + const __m128i b2_lo = _mm_unpacklo_epi16(b1, zero); + const __m128i a2_hi = _mm_unpackhi_epi16(a1, zero); + const __m128i b2_hi = _mm_unpackhi_epi16(b1, zero); + _mm_storeu_si128((__m128i*)&dst[i + 0], a2_lo); + _mm_storeu_si128((__m128i*)&dst[i + 4], a2_hi); + _mm_storeu_si128((__m128i*)&dst[i + 8], b2_lo); + _mm_storeu_si128((__m128i*)&dst[i + 12], b2_hi); + } + for (; i < width; ++i) dst[i] = alpha[i] << 8; + alpha += alpha_stride; + dst += dst_stride; + } +} + +static int ExtractAlpha(const uint8_t* argb, int argb_stride, + int width, int height, + uint8_t* alpha, int alpha_stride) { + // alpha_and stores an 'and' operation of all the alpha[] values. The final + // value is not 0xff if any of the alpha[] is not equal to 0xff. + uint32_t alpha_and = 0xff; + int i, j; + const __m128i a_mask = _mm_set1_epi32(0xffu); // to preserve alpha + const __m128i all_0xff = _mm_set_epi32(0, 0, ~0u, ~0u); + __m128i all_alphas = all_0xff; + + // We must be able to access 3 extra bytes after the last written byte + // 'src[4 * width - 4]', because we don't know if alpha is the first or the + // last byte of the quadruplet. + const int limit = (width - 1) & ~7; + + for (j = 0; j < height; ++j) { + const __m128i* src = (const __m128i*)argb; + for (i = 0; i < limit; i += 8) { + // load 32 argb bytes + const __m128i a0 = _mm_loadu_si128(src + 0); + const __m128i a1 = _mm_loadu_si128(src + 1); + const __m128i b0 = _mm_and_si128(a0, a_mask); + const __m128i b1 = _mm_and_si128(a1, a_mask); + const __m128i c0 = _mm_packs_epi32(b0, b1); + const __m128i d0 = _mm_packus_epi16(c0, c0); + // store + _mm_storel_epi64((__m128i*)&alpha[i], d0); + // accumulate eight alpha 'and' in parallel + all_alphas = _mm_and_si128(all_alphas, d0); + src += 2; + } + for (; i < width; ++i) { + const uint32_t alpha_value = argb[4 * i]; + alpha[i] = alpha_value; + alpha_and &= alpha_value; + } + argb += argb_stride; + alpha += alpha_stride; + } + // Combine the eight alpha 'and' into a 8-bit mask. + alpha_and &= _mm_movemask_epi8(_mm_cmpeq_epi8(all_alphas, all_0xff)); + return (alpha_and == 0xff); +} + +//------------------------------------------------------------------------------ +// Non-dither premultiplied modes + +#define MULTIPLIER(a) ((a) * 0x8081) +#define PREMULTIPLY(x, m) (((x) * (m)) >> 23) + +// We can't use a 'const int' for the SHUFFLE value, because it has to be an +// immediate in the _mm_shufflexx_epi16() instruction. We really a macro here. +#define APPLY_ALPHA(RGBX, SHUFFLE, MASK, MULT) do { \ + const __m128i argb0 = _mm_loadl_epi64((__m128i*)&(RGBX)); \ + const __m128i argb1 = _mm_unpacklo_epi8(argb0, zero); \ + const __m128i alpha0 = _mm_and_si128(argb1, MASK); \ + const __m128i alpha1 = _mm_shufflelo_epi16(alpha0, SHUFFLE); \ + const __m128i alpha2 = _mm_shufflehi_epi16(alpha1, SHUFFLE); \ + /* alpha2 = [0 a0 a0 a0][0 a1 a1 a1] */ \ + const __m128i scale0 = _mm_mullo_epi16(alpha2, MULT); \ + const __m128i scale1 = _mm_mulhi_epu16(alpha2, MULT); \ + const __m128i argb2 = _mm_mulhi_epu16(argb1, scale0); \ + const __m128i argb3 = _mm_mullo_epi16(argb1, scale1); \ + const __m128i argb4 = _mm_adds_epu16(argb2, argb3); \ + const __m128i argb5 = _mm_srli_epi16(argb4, 7); \ + const __m128i argb6 = _mm_or_si128(argb5, alpha0); \ + const __m128i argb7 = _mm_packus_epi16(argb6, zero); \ + _mm_storel_epi64((__m128i*)&(RGBX), argb7); \ +} while (0) + +static void ApplyAlphaMultiply(uint8_t* rgba, int alpha_first, + int w, int h, int stride) { + const __m128i zero = _mm_setzero_si128(); + const int kSpan = 2; + const int w2 = w & ~(kSpan - 1); + while (h-- > 0) { + uint32_t* const rgbx = (uint32_t*)rgba; + int i; + if (!alpha_first) { + const __m128i kMask = _mm_set_epi16(0xff, 0, 0, 0, 0xff, 0, 0, 0); + const __m128i kMult = + _mm_set_epi16(0, 0x8081, 0x8081, 0x8081, 0, 0x8081, 0x8081, 0x8081); + for (i = 0; i < w2; i += kSpan) { + APPLY_ALPHA(rgbx[i], _MM_SHUFFLE(0, 3, 3, 3), kMask, kMult); + } + } else { + const __m128i kMask = _mm_set_epi16(0, 0, 0, 0xff, 0, 0, 0, 0xff); + const __m128i kMult = + _mm_set_epi16(0x8081, 0x8081, 0x8081, 0, 0x8081, 0x8081, 0x8081, 0); + for (i = 0; i < w2; i += kSpan) { + APPLY_ALPHA(rgbx[i], _MM_SHUFFLE(0, 0, 0, 3), kMask, kMult); + } + } + // Finish with left-overs. + for (; i < w; ++i) { + uint8_t* const rgb = rgba + (alpha_first ? 1 : 0); + const uint8_t* const alpha = rgba + (alpha_first ? 0 : 3); + 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 + +// ----------------------------------------------------------------------------- +// Apply alpha value to rows + +// We use: kINV255 = (1 << 24) / 255 = 0x010101 +// So: a * kINV255 = (a << 16) | [(a << 8) | a] +// -> _mm_mulhi_epu16() takes care of the (a<<16) part, +// and _mm_mullo_epu16(a * 0x0101,...) takes care of the "(a << 8) | a" one. + +static void MultARGBRow(uint32_t* const ptr, int width, int inverse) { + int x = 0; + if (!inverse) { + const int kSpan = 2; + const __m128i zero = _mm_setzero_si128(); + const __m128i kRound = + _mm_set_epi16(0, 1 << 7, 1 << 7, 1 << 7, 0, 1 << 7, 1 << 7, 1 << 7); + const __m128i kMult = + _mm_set_epi16(0, 0x0101, 0x0101, 0x0101, 0, 0x0101, 0x0101, 0x0101); + const __m128i kOne64 = _mm_set_epi16(1u << 8, 0, 0, 0, 1u << 8, 0, 0, 0); + const int w2 = width & ~(kSpan - 1); + for (x = 0; x < w2; x += kSpan) { + const __m128i argb0 = _mm_loadl_epi64((__m128i*)&ptr[x]); + const __m128i argb1 = _mm_unpacklo_epi8(argb0, zero); + const __m128i tmp0 = _mm_shufflelo_epi16(argb1, _MM_SHUFFLE(3, 3, 3, 3)); + const __m128i tmp1 = _mm_shufflehi_epi16(tmp0, _MM_SHUFFLE(3, 3, 3, 3)); + const __m128i tmp2 = _mm_srli_epi64(tmp1, 16); + const __m128i scale0 = _mm_mullo_epi16(tmp1, kMult); + const __m128i scale1 = _mm_or_si128(tmp2, kOne64); + const __m128i argb2 = _mm_mulhi_epu16(argb1, scale0); + const __m128i argb3 = _mm_mullo_epi16(argb1, scale1); + const __m128i argb4 = _mm_adds_epu16(argb2, argb3); + const __m128i argb5 = _mm_adds_epu16(argb4, kRound); + const __m128i argb6 = _mm_srli_epi16(argb5, 8); + const __m128i argb7 = _mm_packus_epi16(argb6, zero); + _mm_storel_epi64((__m128i*)&ptr[x], argb7); + } + } + width -= x; + if (width > 0) WebPMultARGBRowC(ptr + x, width, inverse); +} + +static void MultRow(uint8_t* const ptr, const uint8_t* const alpha, + int width, int inverse) { + int x = 0; + if (!inverse) { + const int kSpan = 8; + const __m128i zero = _mm_setzero_si128(); + const __m128i kRound = _mm_set1_epi16(1 << 7); + const int w2 = width & ~(kSpan - 1); + for (x = 0; x < w2; x += kSpan) { + const __m128i v0 = _mm_loadl_epi64((__m128i*)&ptr[x]); + const __m128i v1 = _mm_unpacklo_epi8(v0, zero); + const __m128i alpha0 = _mm_loadl_epi64((const __m128i*)&alpha[x]); + const __m128i alpha1 = _mm_unpacklo_epi8(alpha0, zero); + const __m128i alpha2 = _mm_unpacklo_epi8(alpha0, alpha0); + const __m128i v2 = _mm_mulhi_epu16(v1, alpha2); + const __m128i v3 = _mm_mullo_epi16(v1, alpha1); + const __m128i v4 = _mm_adds_epu16(v2, v3); + const __m128i v5 = _mm_adds_epu16(v4, kRound); + const __m128i v6 = _mm_srli_epi16(v5, 8); + const __m128i v7 = _mm_packus_epi16(v6, zero); + _mm_storel_epi64((__m128i*)&ptr[x], v7); + } + } + width -= x; + if (width > 0) WebPMultRowC(ptr + x, alpha + x, width, inverse); +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPInitAlphaProcessingSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitAlphaProcessingSSE2(void) { + WebPMultARGBRow = MultARGBRow; + WebPMultRow = MultRow; + WebPApplyAlphaMultiply = ApplyAlphaMultiply; + WebPDispatchAlpha = DispatchAlpha; + WebPDispatchAlphaToGreen = DispatchAlphaToGreen; + WebPExtractAlpha = ExtractAlpha; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(WebPInitAlphaProcessingSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/thirdparty/libwebp/dsp/alpha_processing_sse41.c b/thirdparty/libwebp/dsp/alpha_processing_sse41.c new file mode 100644 index 0000000000..986fde94ed --- /dev/null +++ b/thirdparty/libwebp/dsp/alpha_processing_sse41.c @@ -0,0 +1,92 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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 processing transparent channel, SSE4.1 variant. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE41) + +#include <smmintrin.h> + +//------------------------------------------------------------------------------ + +static int ExtractAlpha(const uint8_t* argb, int argb_stride, + int width, int height, + uint8_t* alpha, int alpha_stride) { + // alpha_and stores an 'and' operation of all the alpha[] values. The final + // value is not 0xff if any of the alpha[] is not equal to 0xff. + uint32_t alpha_and = 0xff; + int i, j; + const __m128i all_0xff = _mm_set1_epi32(~0u); + __m128i all_alphas = all_0xff; + + // We must be able to access 3 extra bytes after the last written byte + // 'src[4 * width - 4]', because we don't know if alpha is the first or the + // last byte of the quadruplet. + const int limit = (width - 1) & ~15; + const __m128i kCstAlpha0 = _mm_set_epi8(-1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, 12, 8, 4, 0); + const __m128i kCstAlpha1 = _mm_set_epi8(-1, -1, -1, -1, -1, -1, -1, -1, + 12, 8, 4, 0, -1, -1, -1, -1); + const __m128i kCstAlpha2 = _mm_set_epi8(-1, -1, -1, -1, 12, 8, 4, 0, + -1, -1, -1, -1, -1, -1, -1, -1); + const __m128i kCstAlpha3 = _mm_set_epi8(12, 8, 4, 0, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1); + for (j = 0; j < height; ++j) { + const __m128i* src = (const __m128i*)argb; + for (i = 0; i < limit; i += 16) { + // load 64 argb bytes + const __m128i a0 = _mm_loadu_si128(src + 0); + const __m128i a1 = _mm_loadu_si128(src + 1); + const __m128i a2 = _mm_loadu_si128(src + 2); + const __m128i a3 = _mm_loadu_si128(src + 3); + const __m128i b0 = _mm_shuffle_epi8(a0, kCstAlpha0); + const __m128i b1 = _mm_shuffle_epi8(a1, kCstAlpha1); + const __m128i b2 = _mm_shuffle_epi8(a2, kCstAlpha2); + const __m128i b3 = _mm_shuffle_epi8(a3, kCstAlpha3); + const __m128i c0 = _mm_or_si128(b0, b1); + const __m128i c1 = _mm_or_si128(b2, b3); + const __m128i d0 = _mm_or_si128(c0, c1); + // store + _mm_storeu_si128((__m128i*)&alpha[i], d0); + // accumulate sixteen alpha 'and' in parallel + all_alphas = _mm_and_si128(all_alphas, d0); + src += 4; + } + for (; i < width; ++i) { + const uint32_t alpha_value = argb[4 * i]; + alpha[i] = alpha_value; + alpha_and &= alpha_value; + } + argb += argb_stride; + alpha += alpha_stride; + } + // Combine the sixteen alpha 'and' into an 8-bit mask. + alpha_and |= 0xff00u; // pretend the upper bits [8..15] were tested ok. + alpha_and &= _mm_movemask_epi8(_mm_cmpeq_epi8(all_alphas, all_0xff)); + return (alpha_and == 0xffffu); +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPInitAlphaProcessingSSE41(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitAlphaProcessingSSE41(void) { + WebPExtractAlpha = ExtractAlpha; +} + +#else // !WEBP_USE_SSE41 + +WEBP_DSP_INIT_STUB(WebPInitAlphaProcessingSSE41) + +#endif // WEBP_USE_SSE41 diff --git a/thirdparty/libwebp/dsp/argb.c b/thirdparty/libwebp/dsp/argb.c new file mode 100644 index 0000000000..cc1f9a96c3 --- /dev/null +++ b/thirdparty/libwebp/dsp/argb.c @@ -0,0 +1,68 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// ARGB making functions. +// +// Author: Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +static WEBP_INLINE uint32_t MakeARGB32(int a, int r, int g, int b) { + return (((uint32_t)a << 24) | (r << 16) | (g << 8) | b); +} + +static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g, + const uint8_t* b, int len, uint32_t* out) { + int i; + for (i = 0; i < len; ++i) { + out[i] = MakeARGB32(a[4 * i], r[4 * i], g[4 * i], b[4 * i]); + } +} + +static void PackRGB(const uint8_t* r, const uint8_t* g, const uint8_t* b, + int len, int step, uint32_t* out) { + int i, offset = 0; + for (i = 0; i < len; ++i) { + out[i] = MakeARGB32(0xff, r[offset], g[offset], b[offset]); + offset += step; + } +} + +void (*VP8PackARGB)(const uint8_t*, const uint8_t*, const uint8_t*, + const uint8_t*, int, uint32_t*); +void (*VP8PackRGB)(const uint8_t*, const uint8_t*, const uint8_t*, + int, int, uint32_t*); + +extern void VP8EncDspARGBInitMIPSdspR2(void); +extern void VP8EncDspARGBInitSSE2(void); + +static volatile VP8CPUInfo argb_last_cpuinfo_used = + (VP8CPUInfo)&argb_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInit(void) { + if (argb_last_cpuinfo_used == VP8GetCPUInfo) return; + + VP8PackARGB = PackARGB; + VP8PackRGB = PackRGB; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + VP8EncDspARGBInitSSE2(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + VP8EncDspARGBInitMIPSdspR2(); + } +#endif + } + argb_last_cpuinfo_used = VP8GetCPUInfo; +} diff --git a/thirdparty/libwebp/dsp/argb_mips_dsp_r2.c b/thirdparty/libwebp/dsp/argb_mips_dsp_r2.c new file mode 100644 index 0000000000..af65acb8ff --- /dev/null +++ b/thirdparty/libwebp/dsp/argb_mips_dsp_r2.c @@ -0,0 +1,110 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// ARGB making functions (mips version). +// +// Author: Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g, + const uint8_t* b, int len, uint32_t* out) { + int temp0, temp1, temp2, temp3, offset; + const int rest = len & 1; + const uint32_t* const loop_end = out + len - rest; + const int step = 4; + __asm__ volatile ( + "xor %[offset], %[offset], %[offset] \n\t" + "beq %[loop_end], %[out], 0f \n\t" + "2: \n\t" + "lbux %[temp0], %[offset](%[a]) \n\t" + "lbux %[temp1], %[offset](%[r]) \n\t" + "lbux %[temp2], %[offset](%[g]) \n\t" + "lbux %[temp3], %[offset](%[b]) \n\t" + "ins %[temp1], %[temp0], 16, 16 \n\t" + "ins %[temp3], %[temp2], 16, 16 \n\t" + "addiu %[out], %[out], 4 \n\t" + "precr.qb.ph %[temp0], %[temp1], %[temp3] \n\t" + "sw %[temp0], -4(%[out]) \n\t" + "addu %[offset], %[offset], %[step] \n\t" + "bne %[loop_end], %[out], 2b \n\t" + "0: \n\t" + "beq %[rest], $zero, 1f \n\t" + "lbux %[temp0], %[offset](%[a]) \n\t" + "lbux %[temp1], %[offset](%[r]) \n\t" + "lbux %[temp2], %[offset](%[g]) \n\t" + "lbux %[temp3], %[offset](%[b]) \n\t" + "ins %[temp1], %[temp0], 16, 16 \n\t" + "ins %[temp3], %[temp2], 16, 16 \n\t" + "precr.qb.ph %[temp0], %[temp1], %[temp3] \n\t" + "sw %[temp0], 0(%[out]) \n\t" + "1: \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [offset]"=&r"(offset), [out]"+&r"(out) + : [a]"r"(a), [r]"r"(r), [g]"r"(g), [b]"r"(b), [step]"r"(step), + [loop_end]"r"(loop_end), [rest]"r"(rest) + : "memory" + ); +} + +static void PackRGB(const uint8_t* r, const uint8_t* g, const uint8_t* b, + int len, int step, uint32_t* out) { + int temp0, temp1, temp2, offset; + const int rest = len & 1; + const int a = 0xff; + const uint32_t* const loop_end = out + len - rest; + __asm__ volatile ( + "xor %[offset], %[offset], %[offset] \n\t" + "beq %[loop_end], %[out], 0f \n\t" + "2: \n\t" + "lbux %[temp0], %[offset](%[r]) \n\t" + "lbux %[temp1], %[offset](%[g]) \n\t" + "lbux %[temp2], %[offset](%[b]) \n\t" + "ins %[temp0], %[a], 16, 16 \n\t" + "ins %[temp2], %[temp1], 16, 16 \n\t" + "addiu %[out], %[out], 4 \n\t" + "precr.qb.ph %[temp0], %[temp0], %[temp2] \n\t" + "sw %[temp0], -4(%[out]) \n\t" + "addu %[offset], %[offset], %[step] \n\t" + "bne %[loop_end], %[out], 2b \n\t" + "0: \n\t" + "beq %[rest], $zero, 1f \n\t" + "lbux %[temp0], %[offset](%[r]) \n\t" + "lbux %[temp1], %[offset](%[g]) \n\t" + "lbux %[temp2], %[offset](%[b]) \n\t" + "ins %[temp0], %[a], 16, 16 \n\t" + "ins %[temp2], %[temp1], 16, 16 \n\t" + "precr.qb.ph %[temp0], %[temp0], %[temp2] \n\t" + "sw %[temp0], 0(%[out]) \n\t" + "1: \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [offset]"=&r"(offset), [out]"+&r"(out) + : [a]"r"(a), [r]"r"(r), [g]"r"(g), [b]"r"(b), [step]"r"(step), + [loop_end]"r"(loop_end), [rest]"r"(rest) + : "memory" + ); +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspARGBInitMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitMIPSdspR2(void) { + VP8PackARGB = PackARGB; + VP8PackRGB = PackRGB; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(VP8EncDspARGBInitMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/argb_sse2.c b/thirdparty/libwebp/dsp/argb_sse2.c new file mode 100644 index 0000000000..afcb1957e7 --- /dev/null +++ b/thirdparty/libwebp/dsp/argb_sse2.c @@ -0,0 +1,67 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// ARGB making functions (SSE2 version). +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) + +#include <assert.h> +#include <emmintrin.h> +#include <string.h> + +static WEBP_INLINE uint32_t MakeARGB32(int a, int r, int g, int b) { + return (((uint32_t)a << 24) | (r << 16) | (g << 8) | b); +} + +static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g, + const uint8_t* b, int len, uint32_t* out) { + if (g == r + 1) { // RGBA input order. Need to swap R and B. + int i = 0; + const int len_max = len & ~3; // max length processed in main loop + const __m128i red_blue_mask = _mm_set1_epi32(0x00ff00ffu); + assert(b == r + 2); + assert(a == r + 3); + for (; i < len_max; i += 4) { + const __m128i A = _mm_loadu_si128((const __m128i*)(r + 4 * i)); + const __m128i B = _mm_and_si128(A, red_blue_mask); // R 0 B 0 + const __m128i C = _mm_andnot_si128(red_blue_mask, A); // 0 G 0 A + const __m128i D = _mm_shufflelo_epi16(B, _MM_SHUFFLE(2, 3, 0, 1)); + const __m128i E = _mm_shufflehi_epi16(D, _MM_SHUFFLE(2, 3, 0, 1)); + const __m128i F = _mm_or_si128(E, C); + _mm_storeu_si128((__m128i*)(out + i), F); + } + for (; i < len; ++i) { + out[i] = MakeARGB32(a[4 * i], r[4 * i], g[4 * i], b[4 * i]); + } + } else { + assert(g == b + 1); + assert(r == b + 2); + assert(a == b + 3); + memcpy(out, b, len * 4); + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspARGBInitSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitSSE2(void) { + VP8PackARGB = PackARGB; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(VP8EncDspARGBInitSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/thirdparty/libwebp/dsp/common_sse2.h b/thirdparty/libwebp/dsp/common_sse2.h new file mode 100644 index 0000000000..7cea13fb3c --- /dev/null +++ b/thirdparty/libwebp/dsp/common_sse2.h @@ -0,0 +1,109 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// 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 code common to several files. +// +// Author: Vincent Rabaud (vrabaud@google.com) + +#ifndef WEBP_DSP_COMMON_SSE2_H_ +#define WEBP_DSP_COMMON_SSE2_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#if defined(WEBP_USE_SSE2) + +#include <emmintrin.h> + +//------------------------------------------------------------------------------ +// Quite useful macro for debugging. Left here for convenience. + +#if 0 +#include <stdio.h> +static WEBP_INLINE 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 + +//------------------------------------------------------------------------------ +// Math functions. + +// Return the sum of all the 8b in the register. +static WEBP_INLINE int VP8HorizontalAdd8b(const __m128i* const a) { + const __m128i zero = _mm_setzero_si128(); + const __m128i sad8x2 = _mm_sad_epu8(*a, zero); + // sum the two sads: sad8x2[0:1] + sad8x2[8:9] + const __m128i sum = _mm_add_epi32(sad8x2, _mm_shuffle_epi32(sad8x2, 2)); + return _mm_cvtsi128_si32(sum); +} + +// Transpose two 4x4 16b matrices horizontally stored in registers. +static WEBP_INLINE void VP8Transpose_2_4x4_16b( + const __m128i* const in0, const __m128i* const in1, + const __m128i* const in2, const __m128i* const in3, __m128i* const out0, + __m128i* const out1, __m128i* const out2, __m128i* const out3) { + // 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(*in0, *in1); + const __m128i transpose0_1 = _mm_unpacklo_epi16(*in2, *in3); + const __m128i transpose0_2 = _mm_unpackhi_epi16(*in0, *in1); + const __m128i transpose0_3 = _mm_unpackhi_epi16(*in2, *in3); + // 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 + *out0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); + *out1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); + *out2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); + *out3 = _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 +} + +#endif // WEBP_USE_SSE2 + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // WEBP_DSP_COMMON_SSE2_H_ diff --git a/thirdparty/libwebp/dsp/cost.c b/thirdparty/libwebp/dsp/cost.c new file mode 100644 index 0000000000..fe72d26e79 --- /dev/null +++ b/thirdparty/libwebp/dsp/cost.c @@ -0,0 +1,412 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" +#include "../enc/cost.h" + +//------------------------------------------------------------------------------ +// 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 + +// 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[MAX_LEVEL + 1] = { + 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 +}; + +//------------------------------------------------------------------------------ +// 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 +}; + +//------------------------------------------------------------------------------ +// Mode costs + +static int GetResidualCost(int ctx0, const VP8Residual* const res) { + int n = res->first; + // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 + const int p0 = res->prob[n][ctx0][0]; + CostArrayPtr const costs = res->costs; + const uint16_t* t = costs[n][ctx0]; + // bit_cost(1, p0) is already incorporated in t[] tables, but only if ctx != 0 + // (as required by the syntax). For ctx0 == 0, we need to add it here or it'll + // be missing during the loop. + int cost = (ctx0 == 0) ? VP8BitCost(1, p0) : 0; + + if (res->last < 0) { + return VP8BitCost(0, p0); + } + for (; n < res->last; ++n) { + const int v = abs(res->coeffs[n]); + const int ctx = (v >= 2) ? 2 : v; + cost += VP8LevelCost(t, v); + t = costs[n + 1][ctx]; + } + // Last coefficient is always non-zero + { + const int v = abs(res->coeffs[n]); + assert(v != 0); + cost += VP8LevelCost(t, v); + if (n < 15) { + const int b = VP8EncBands[n + 1]; + const int ctx = (v == 1) ? 1 : 2; + const int last_p0 = res->prob[b][ctx][0]; + cost += VP8BitCost(0, last_p0); + } + } + return cost; +} + +static void SetResidualCoeffs(const int16_t* const coeffs, + VP8Residual* const res) { + int n; + res->last = -1; + assert(res->first == 0 || coeffs[0] == 0); + for (n = 15; n >= 0; --n) { + if (coeffs[n]) { + res->last = n; + break; + } + } + res->coeffs = coeffs; +} + +//------------------------------------------------------------------------------ +// init function + +VP8GetResidualCostFunc VP8GetResidualCost; +VP8SetResidualCoeffsFunc VP8SetResidualCoeffs; + +extern void VP8EncDspCostInitMIPS32(void); +extern void VP8EncDspCostInitMIPSdspR2(void); +extern void VP8EncDspCostInitSSE2(void); + +static volatile VP8CPUInfo cost_last_cpuinfo_used = + (VP8CPUInfo)&cost_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspCostInit(void) { + if (cost_last_cpuinfo_used == VP8GetCPUInfo) return; + + VP8GetResidualCost = GetResidualCost; + VP8SetResidualCoeffs = SetResidualCoeffs; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_MIPS32) + if (VP8GetCPUInfo(kMIPS32)) { + VP8EncDspCostInitMIPS32(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + VP8EncDspCostInitMIPSdspR2(); + } +#endif +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + VP8EncDspCostInitSSE2(); + } +#endif + } + + cost_last_cpuinfo_used = VP8GetCPUInfo; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dsp/cost_mips32.c b/thirdparty/libwebp/dsp/cost_mips32.c new file mode 100644 index 0000000000..d1e240e191 --- /dev/null +++ b/thirdparty/libwebp/dsp/cost_mips32.c @@ -0,0 +1,154 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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: Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS32) + +#include "../enc/cost.h" + +static int GetResidualCost(int ctx0, const VP8Residual* const res) { + int temp0, temp1; + int v_reg, ctx_reg; + int n = res->first; + // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 + int p0 = res->prob[n][ctx0][0]; + CostArrayPtr const costs = res->costs; + const uint16_t* t = costs[n][ctx0]; + // bit_cost(1, p0) is already incorporated in t[] tables, but only if ctx != 0 + // (as required by the syntax). For ctx0 == 0, we need to add it here or it'll + // be missing during the loop. + int cost = (ctx0 == 0) ? VP8BitCost(1, p0) : 0; + const int16_t* res_coeffs = res->coeffs; + const int res_last = res->last; + const int const_max_level = MAX_VARIABLE_LEVEL; + const int const_2 = 2; + const uint16_t** p_costs = &costs[n][0]; + const size_t inc_p_costs = NUM_CTX * sizeof(*p_costs); + + if (res->last < 0) { + return VP8BitCost(0, p0); + } + + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "subu %[temp1], %[res_last], %[n] \n\t" + "sll %[temp0], %[n], 1 \n\t" + "blez %[temp1], 2f \n\t" + " addu %[res_coeffs], %[res_coeffs], %[temp0] \n\t" + "1: \n\t" + "lh %[v_reg], 0(%[res_coeffs]) \n\t" + "addiu %[n], %[n], 1 \n\t" + "negu %[temp0], %[v_reg] \n\t" + "slti %[temp1], %[v_reg], 0 \n\t" + "movn %[v_reg], %[temp0], %[temp1] \n\t" + "sltiu %[temp0], %[v_reg], 2 \n\t" + "move %[ctx_reg], %[v_reg] \n\t" + "movz %[ctx_reg], %[const_2], %[temp0] \n\t" + "sll %[temp1], %[v_reg], 1 \n\t" + "addu %[temp1], %[temp1], %[VP8LevelFixedCosts] \n\t" + "lhu %[temp1], 0(%[temp1]) \n\t" + "slt %[temp0], %[v_reg], %[const_max_level] \n\t" + "movz %[v_reg], %[const_max_level], %[temp0] \n\t" + "addu %[cost], %[cost], %[temp1] \n\t" + "sll %[v_reg], %[v_reg], 1 \n\t" + "sll %[ctx_reg], %[ctx_reg], 2 \n\t" + "addu %[v_reg], %[v_reg], %[t] \n\t" + "lhu %[temp0], 0(%[v_reg]) \n\t" + "addu %[p_costs], %[p_costs], %[inc_p_costs] \n\t" + "addu %[t], %[p_costs], %[ctx_reg] \n\t" + "addu %[cost], %[cost], %[temp0] \n\t" + "addiu %[res_coeffs], %[res_coeffs], 2 \n\t" + "bne %[n], %[res_last], 1b \n\t" + " lw %[t], 0(%[t]) \n\t" + "2: \n\t" + ".set pop \n\t" + : [cost]"+&r"(cost), [t]"+&r"(t), [n]"+&r"(n), [v_reg]"=&r"(v_reg), + [ctx_reg]"=&r"(ctx_reg), [p_costs]"+&r"(p_costs), [temp0]"=&r"(temp0), + [temp1]"=&r"(temp1), [res_coeffs]"+&r"(res_coeffs) + : [const_2]"r"(const_2), [const_max_level]"r"(const_max_level), + [VP8LevelFixedCosts]"r"(VP8LevelFixedCosts), [res_last]"r"(res_last), + [inc_p_costs]"r"(inc_p_costs) + : "memory" + ); + + // Last coefficient is always non-zero + { + const int v = abs(res->coeffs[n]); + assert(v != 0); + cost += VP8LevelCost(t, v); + if (n < 15) { + const int b = VP8EncBands[n + 1]; + const int ctx = (v == 1) ? 1 : 2; + const int last_p0 = res->prob[b][ctx][0]; + cost += VP8BitCost(0, last_p0); + } + } + return cost; +} + +static void SetResidualCoeffs(const int16_t* const coeffs, + VP8Residual* const res) { + const int16_t* p_coeffs = (int16_t*)coeffs; + int temp0, temp1, temp2, n, n1; + assert(res->first == 0 || coeffs[0] == 0); + + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "addiu %[p_coeffs], %[p_coeffs], 28 \n\t" + "li %[n], 15 \n\t" + "li %[temp2], -1 \n\t" + "0: \n\t" + "ulw %[temp0], 0(%[p_coeffs]) \n\t" + "beqz %[temp0], 1f \n\t" +#if defined(WORDS_BIGENDIAN) + " sll %[temp1], %[temp0], 16 \n\t" +#else + " srl %[temp1], %[temp0], 16 \n\t" +#endif + "addiu %[n1], %[n], -1 \n\t" + "movz %[temp0], %[n1], %[temp1] \n\t" + "movn %[temp0], %[n], %[temp1] \n\t" + "j 2f \n\t" + " addiu %[temp2], %[temp0], 0 \n\t" + "1: \n\t" + "addiu %[n], %[n], -2 \n\t" + "bgtz %[n], 0b \n\t" + " addiu %[p_coeffs], %[p_coeffs], -4 \n\t" + "2: \n\t" + ".set pop \n\t" + : [p_coeffs]"+&r"(p_coeffs), [temp0]"=&r"(temp0), + [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [n]"=&r"(n), [n1]"=&r"(n1) + : + : "memory" + ); + res->last = temp2; + res->coeffs = coeffs; +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspCostInitMIPS32(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspCostInitMIPS32(void) { + VP8GetResidualCost = GetResidualCost; + VP8SetResidualCoeffs = SetResidualCoeffs; +} + +#else // !WEBP_USE_MIPS32 + +WEBP_DSP_INIT_STUB(VP8EncDspCostInitMIPS32) + +#endif // WEBP_USE_MIPS32 diff --git a/thirdparty/libwebp/dsp/cost_mips_dsp_r2.c b/thirdparty/libwebp/dsp/cost_mips_dsp_r2.c new file mode 100644 index 0000000000..ce64067756 --- /dev/null +++ b/thirdparty/libwebp/dsp/cost_mips_dsp_r2.c @@ -0,0 +1,107 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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: Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include "../enc/cost.h" + +static int GetResidualCost(int ctx0, const VP8Residual* const res) { + int temp0, temp1; + int v_reg, ctx_reg; + int n = res->first; + // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 + int p0 = res->prob[n][ctx0][0]; + CostArrayPtr const costs = res->costs; + const uint16_t* t = costs[n][ctx0]; + // bit_cost(1, p0) is already incorporated in t[] tables, but only if ctx != 0 + // (as required by the syntax). For ctx0 == 0, we need to add it here or it'll + // be missing during the loop. + int cost = (ctx0 == 0) ? VP8BitCost(1, p0) : 0; + const int16_t* res_coeffs = res->coeffs; + const int res_last = res->last; + const int const_max_level = MAX_VARIABLE_LEVEL; + const int const_2 = 2; + const uint16_t** p_costs = &costs[n][0]; + const size_t inc_p_costs = NUM_CTX * sizeof(*p_costs); + + if (res->last < 0) { + return VP8BitCost(0, p0); + } + + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "subu %[temp1], %[res_last], %[n] \n\t" + "blez %[temp1], 2f \n\t" + " nop \n\t" + "1: \n\t" + "sll %[temp0], %[n], 1 \n\t" + "lhx %[v_reg], %[temp0](%[res_coeffs]) \n\t" + "addiu %[n], %[n], 1 \n\t" + "absq_s.w %[v_reg], %[v_reg] \n\t" + "sltiu %[temp0], %[v_reg], 2 \n\t" + "move %[ctx_reg], %[v_reg] \n\t" + "movz %[ctx_reg], %[const_2], %[temp0] \n\t" + "sll %[temp1], %[v_reg], 1 \n\t" + "lhx %[temp1], %[temp1](%[VP8LevelFixedCosts]) \n\t" + "slt %[temp0], %[v_reg], %[const_max_level] \n\t" + "movz %[v_reg], %[const_max_level], %[temp0] \n\t" + "addu %[cost], %[cost], %[temp1] \n\t" + "sll %[v_reg], %[v_reg], 1 \n\t" + "sll %[ctx_reg], %[ctx_reg], 2 \n\t" + "lhx %[temp0], %[v_reg](%[t]) \n\t" + "addu %[p_costs], %[p_costs], %[inc_p_costs] \n\t" + "addu %[t], %[p_costs], %[ctx_reg] \n\t" + "addu %[cost], %[cost], %[temp0] \n\t" + "bne %[n], %[res_last], 1b \n\t" + " lw %[t], 0(%[t]) \n\t" + "2: \n\t" + ".set pop \n\t" + : [cost]"+&r"(cost), [t]"+&r"(t), [n]"+&r"(n), [v_reg]"=&r"(v_reg), + [ctx_reg]"=&r"(ctx_reg), [p_costs]"+&r"(p_costs), [temp0]"=&r"(temp0), + [temp1]"=&r"(temp1) + : [const_2]"r"(const_2), [const_max_level]"r"(const_max_level), + [VP8LevelFixedCosts]"r"(VP8LevelFixedCosts), [res_last]"r"(res_last), + [res_coeffs]"r"(res_coeffs), [inc_p_costs]"r"(inc_p_costs) + : "memory" + ); + + // Last coefficient is always non-zero + { + const int v = abs(res->coeffs[n]); + assert(v != 0); + cost += VP8LevelCost(t, v); + if (n < 15) { + const int b = VP8EncBands[n + 1]; + const int ctx = (v == 1) ? 1 : 2; + const int last_p0 = res->prob[b][ctx][0]; + cost += VP8BitCost(0, last_p0); + } + } + return cost; +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspCostInitMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspCostInitMIPSdspR2(void) { + VP8GetResidualCost = GetResidualCost; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(VP8EncDspCostInitMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/cost_sse2.c b/thirdparty/libwebp/dsp/cost_sse2.c new file mode 100644 index 0000000000..0cb1c1fa04 --- /dev/null +++ b/thirdparty/libwebp/dsp/cost_sse2.c @@ -0,0 +1,119 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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 cost functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) +#include <emmintrin.h> + +#include "../enc/cost.h" +#include "../enc/vp8enci.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ + +static void SetResidualCoeffsSSE2(const int16_t* const coeffs, + VP8Residual* const res) { + const __m128i c0 = _mm_loadu_si128((const __m128i*)(coeffs + 0)); + const __m128i c1 = _mm_loadu_si128((const __m128i*)(coeffs + 8)); + // Use SSE2 to compare 16 values with a single instruction. + const __m128i zero = _mm_setzero_si128(); + const __m128i m0 = _mm_packs_epi16(c0, c1); + const __m128i m1 = _mm_cmpeq_epi8(m0, zero); + // Get the comparison results as a bitmask into 16bits. Negate the mask to get + // the position of entries that are not equal to zero. We don't need to mask + // out least significant bits according to res->first, since coeffs[0] is 0 + // if res->first > 0. + const uint32_t mask = 0x0000ffffu ^ (uint32_t)_mm_movemask_epi8(m1); + // The position of the most significant non-zero bit indicates the position of + // the last non-zero value. + assert(res->first == 0 || coeffs[0] == 0); + res->last = mask ? BitsLog2Floor(mask) : -1; + res->coeffs = coeffs; +} + +static int GetResidualCostSSE2(int ctx0, const VP8Residual* const res) { + uint8_t levels[16], ctxs[16]; + uint16_t abs_levels[16]; + int n = res->first; + // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 + const int p0 = res->prob[n][ctx0][0]; + CostArrayPtr const costs = res->costs; + const uint16_t* t = costs[n][ctx0]; + // bit_cost(1, p0) is already incorporated in t[] tables, but only if ctx != 0 + // (as required by the syntax). For ctx0 == 0, we need to add it here or it'll + // be missing during the loop. + int cost = (ctx0 == 0) ? VP8BitCost(1, p0) : 0; + + if (res->last < 0) { + return VP8BitCost(0, p0); + } + + { // precompute clamped levels and contexts, packed to 8b. + const __m128i zero = _mm_setzero_si128(); + const __m128i kCst2 = _mm_set1_epi8(2); + const __m128i kCst67 = _mm_set1_epi8(MAX_VARIABLE_LEVEL); + const __m128i c0 = _mm_loadu_si128((const __m128i*)&res->coeffs[0]); + const __m128i c1 = _mm_loadu_si128((const __m128i*)&res->coeffs[8]); + const __m128i D0 = _mm_sub_epi16(zero, c0); + const __m128i D1 = _mm_sub_epi16(zero, c1); + const __m128i E0 = _mm_max_epi16(c0, D0); // abs(v), 16b + const __m128i E1 = _mm_max_epi16(c1, D1); + const __m128i F = _mm_packs_epi16(E0, E1); + const __m128i G = _mm_min_epu8(F, kCst2); // context = 0,1,2 + const __m128i H = _mm_min_epu8(F, kCst67); // clamp_level in [0..67] + + _mm_storeu_si128((__m128i*)&ctxs[0], G); + _mm_storeu_si128((__m128i*)&levels[0], H); + + _mm_storeu_si128((__m128i*)&abs_levels[0], E0); + _mm_storeu_si128((__m128i*)&abs_levels[8], E1); + } + for (; n < res->last; ++n) { + const int ctx = ctxs[n]; + const int level = levels[n]; + const int flevel = abs_levels[n]; // full level + cost += VP8LevelFixedCosts[flevel] + t[level]; // simplified VP8LevelCost() + t = costs[n + 1][ctx]; + } + // Last coefficient is always non-zero + { + const int level = levels[n]; + const int flevel = abs_levels[n]; + assert(flevel != 0); + cost += VP8LevelFixedCosts[flevel] + t[level]; + if (n < 15) { + const int b = VP8EncBands[n + 1]; + const int ctx = ctxs[n]; + const int last_p0 = res->prob[b][ctx][0]; + cost += VP8BitCost(0, last_p0); + } + } + return cost; +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspCostInitSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspCostInitSSE2(void) { + VP8SetResidualCoeffs = SetResidualCoeffsSSE2; + VP8GetResidualCost = GetResidualCostSSE2; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(VP8EncDspCostInitSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/thirdparty/libwebp/dsp/cpu.c b/thirdparty/libwebp/dsp/cpu.c new file mode 100644 index 0000000000..cbb08db90a --- /dev/null +++ b/thirdparty/libwebp/dsp/cpu.c @@ -0,0 +1,187 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Christian Duvivier (cduvivier@google.com) + +#include "./dsp.h" + +#if defined(WEBP_HAVE_NEON_RTCD) +#include <stdio.h> +#include <string.h> +#endif + +#if defined(WEBP_ANDROID_NEON) +#include <cpu-features.h> +#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), "c"(0)); +} +#elif defined(__x86_64__) && \ + (defined(__code_model_medium__) || defined(__code_model_large__)) && \ + defined(__PIC__) +static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { + __asm__ volatile ( + "xchg{q}\t{%%rbx}, %q1\n" + "cpuid\n" + "xchg{q}\t{%%rbx}, %q1\n" + : "=a"(cpu_info[0]), "=&r"(cpu_info[1]), "=c"(cpu_info[2]), + "=d"(cpu_info[3]) + : "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), "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); + } + 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) // 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(); + 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(WEBP_USE_NEON) +// define a dummy function to enable turning off NEON at runtime by setting +// VP8DecGetCPUInfo = NULL +static int armCPUInfo(CPUFeature feature) { + if (feature != kNEON) return 0; +#if defined(__linux__) && defined(WEBP_HAVE_NEON_RTCD) + { + int has_neon = 0; + char line[200]; + FILE* const cpuinfo = fopen("/proc/cpuinfo", "r"); + if (cpuinfo == NULL) return 0; + while (fgets(line, sizeof(line), cpuinfo)) { + if (!strncmp(line, "Features", 8)) { + if (strstr(line, " neon ") != NULL) { + has_neon = 1; + break; + } + } + } + fclose(cpuinfo); + return has_neon; + } +#else + return 1; +#endif +} +VP8CPUInfo VP8GetCPUInfo = armCPUInfo; +#elif defined(WEBP_USE_MIPS32) || defined(WEBP_USE_MIPS_DSP_R2) || \ + defined(WEBP_USE_MSA) +static int mipsCPUInfo(CPUFeature feature) { + if ((feature == kMIPS32) || (feature == kMIPSdspR2) || (feature == kMSA)) { + return 1; + } else { + return 0; + } + +} +VP8CPUInfo VP8GetCPUInfo = mipsCPUInfo; +#else +VP8CPUInfo VP8GetCPUInfo = NULL; +#endif + diff --git a/thirdparty/libwebp/dsp/dec.c b/thirdparty/libwebp/dsp/dec.c new file mode 100644 index 0000000000..e92d693362 --- /dev/null +++ b/thirdparty/libwebp/dsp/dec.c @@ -0,0 +1,795 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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, default plain-C implementations. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" +#include "../dec/vp8i.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ + +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)) + +#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; + 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 = 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] + 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. + (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. + // 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 = 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); + STORE(3, 0, a - d); + tmp++; + dst += BPS; + } +} + +// 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); + 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]) 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 + +//------------------------------------------------------------------------------ +// 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); + +//------------------------------------------------------------------------------ +// 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 = VP8kclip1 - 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); +} + +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 + 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]; + WebPUint32ToMem(dst + 0 * BPS, 0x01010101U * AVG3(A, B, C)); + WebPUint32ToMem(dst + 1 * BPS, 0x01010101U * AVG3(B, C, D)); + WebPUint32ToMem(dst + 2 * BPS, 0x01010101U * AVG3(C, D, E)); + WebPUint32ToMem(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(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 + 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 + +VP8PredFunc VP8PredLuma4[NUM_BMODES]; + +//------------------------------------------------------------------------------ +// 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(uint8_t value, uint8_t* dst) { + int j; + for (j = 0; j < 8; ++j) { + memset(dst + j * BPS, value, 8); + } +} + +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(dc0 >> 4, 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(dc0 >> 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); +} + +VP8PredFunc VP8PredChroma8[NUM_B_DC_MODES]; + +//------------------------------------------------------------------------------ +// 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) + 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 = VP8ksclip2[(a + 4) >> 3]; + const int a2 = VP8ksclip2[(a + 3) >> 3]; + const int a3 = (a1 + 1) >> 1; + 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 = 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] = 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 (VP8kabs0[p1 - p0] > thresh) || (VP8kabs0[q1 - q0] > 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]; + 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; +} + +//------------------------------------------------------------------------------ +// Simple In-loop filtering (Paragraph 15.2) + +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, thresh2)) { + do_filter2(p + i, stride); + } + } +} + +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, thresh2)) { + 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) { + const int thresh2 = 2 * thresh + 1; + while (size-- > 0) { + if (needs_filter2(p, hstride, thresh2, 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) { + const int thresh2 = 2 * thresh + 1; + while (size-- > 0) { + if (needs_filter2(p, hstride, thresh2, 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); +} + +//------------------------------------------------------------------------------ + +static void DitherCombine8x8(const uint8_t* dither, uint8_t* dst, + int dst_stride) { + int i, j; + for (j = 0; j < 8; ++j) { + for (i = 0; i < 8; ++i) { + const int delta0 = dither[i] - VP8_DITHER_AMP_CENTER; + const int delta1 = + (delta0 + VP8_DITHER_DESCALE_ROUNDER) >> VP8_DITHER_DESCALE; + dst[i] = clip_8b((int)dst[i] + delta1); + } + dst += dst_stride; + dither += 8; + } +} + +//------------------------------------------------------------------------------ + +VP8DecIdct2 VP8Transform; +VP8DecIdct VP8TransformAC3; +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; + +void (*VP8DitherCombine8x8)(const uint8_t* dither, uint8_t* dst, + int dst_stride); + +extern void VP8DspInitSSE2(void); +extern void VP8DspInitSSE41(void); +extern void VP8DspInitNEON(void); +extern void VP8DspInitMIPS32(void); +extern void VP8DspInitMIPSdspR2(void); +extern void VP8DspInitMSA(void); + +static volatile VP8CPUInfo dec_last_cpuinfo_used = + (VP8CPUInfo)&dec_last_cpuinfo_used; + +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; + VP8VFilter8 = VFilter8; + VP8HFilter8 = HFilter8; + VP8VFilter16i = VFilter16i; + VP8HFilter16i = HFilter16i; + VP8VFilter8i = VFilter8i; + VP8HFilter8i = HFilter8i; + VP8SimpleVFilter16 = SimpleVFilter16; + VP8SimpleHFilter16 = SimpleHFilter16; + 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; + + VP8DitherCombine8x8 = DitherCombine8x8; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + VP8DspInitSSE2(); +#if defined(WEBP_USE_SSE41) + if (VP8GetCPUInfo(kSSE4_1)) { + VP8DspInitSSE41(); + } +#endif + } +#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 +#if defined(WEBP_USE_MSA) + if (VP8GetCPUInfo(kMSA)) { + VP8DspInitMSA(); + } +#endif + } + dec_last_cpuinfo_used = VP8GetCPUInfo; +} diff --git a/thirdparty/libwebp/dsp/dec_clip_tables.c b/thirdparty/libwebp/dsp/dec_clip_tables.c new file mode 100644 index 0000000000..3b6dde86ba --- /dev/null +++ b/thirdparty/libwebp/dsp/dec_clip_tables.c @@ -0,0 +1,366 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Clipping tables for filtering +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#define USE_STATIC_TABLES // undefine to have run-time table initialization + +#ifdef USE_STATIC_TABLES + +static const uint8_t abs0[255 + 255 + 1] = { + 0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8, 0xf7, 0xf6, 0xf5, 0xf4, + 0xf3, 0xf2, 0xf1, 0xf0, 0xef, 0xee, 0xed, 0xec, 0xeb, 0xea, 0xe9, 0xe8, + 0xe7, 0xe6, 0xe5, 0xe4, 0xe3, 0xe2, 0xe1, 0xe0, 0xdf, 0xde, 0xdd, 0xdc, + 0xdb, 0xda, 0xd9, 0xd8, 0xd7, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xd0, + 0xcf, 0xce, 0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc8, 0xc7, 0xc6, 0xc5, 0xc4, + 0xc3, 0xc2, 0xc1, 0xc0, 0xbf, 0xbe, 0xbd, 0xbc, 0xbb, 0xba, 0xb9, 0xb8, + 0xb7, 0xb6, 0xb5, 0xb4, 0xb3, 0xb2, 0xb1, 0xb0, 0xaf, 0xae, 0xad, 0xac, + 0xab, 0xaa, 0xa9, 0xa8, 0xa7, 0xa6, 0xa5, 0xa4, 0xa3, 0xa2, 0xa1, 0xa0, + 0x9f, 0x9e, 0x9d, 0x9c, 0x9b, 0x9a, 0x99, 0x98, 0x97, 0x96, 0x95, 0x94, + 0x93, 0x92, 0x91, 0x90, 0x8f, 0x8e, 0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x88, + 0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80, 0x7f, 0x7e, 0x7d, 0x7c, + 0x7b, 0x7a, 0x79, 0x78, 0x77, 0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x70, + 0x6f, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0x67, 0x66, 0x65, 0x64, + 0x63, 0x62, 0x61, 0x60, 0x5f, 0x5e, 0x5d, 0x5c, 0x5b, 0x5a, 0x59, 0x58, + 0x57, 0x56, 0x55, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0x4e, 0x4d, 0x4c, + 0x4b, 0x4a, 0x49, 0x48, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0x41, 0x40, + 0x3f, 0x3e, 0x3d, 0x3c, 0x3b, 0x3a, 0x39, 0x38, 0x37, 0x36, 0x35, 0x34, + 0x33, 0x32, 0x31, 0x30, 0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28, + 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, + 0x1b, 0x1a, 0x19, 0x18, 0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10, + 0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08, 0x07, 0x06, 0x05, 0x04, + 0x03, 0x02, 0x01, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, + 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, + 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, + 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, + 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, + 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, + 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, + 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, + 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, + 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, + 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, + 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, + 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, + 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, + 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, + 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, + 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, + 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, + 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, + 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, + 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff +}; + +static const int8_t sclip1[1020 + 1020 + 1] = { + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 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0x7f, 0x7f, 0x7f, 0x7f, 0x7f, + 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, + 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, + 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f +}; + +static const int8_t sclip2[112 + 112 + 1] = { + 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, + 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, + 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, + 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, + 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, + 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, + 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, + 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, + 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, + 0xfc, 0xfd, 0xfe, 0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, + 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f +}; + +static const uint8_t clip1[255 + 511 + 1] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, + 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, + 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, + 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, + 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, + 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, + 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, + 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, + 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, + 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, + 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, + 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, + 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, + 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, + 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, + 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, + 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, + 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, + 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, + 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, + 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff +}; + +#else + +// uninitialized tables +static uint8_t abs0[255 + 255 + 1]; +static int8_t sclip1[1020 + 1020 + 1]; +static int8_t sclip2[112 + 112 + 1]; +static uint8_t clip1[255 + 511 + 1]; + +// 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; + +#endif + +const int8_t* const VP8ksclip1 = &sclip1[1020]; +const int8_t* const VP8ksclip2 = &sclip2[112]; +const uint8_t* const VP8kclip1 = &clip1[255]; +const uint8_t* const VP8kabs0 = &abs0[255]; + +WEBP_TSAN_IGNORE_FUNCTION void VP8InitClipTables(void) { +#if !defined(USE_STATIC_TABLES) + int i; + if (!tables_ok) { + for (i = -255; i <= 255; ++i) { + abs0[255 + i] = (i < 0) ? -i : i; + } + 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; + } +#endif // USE_STATIC_TABLES +} diff --git a/thirdparty/libwebp/dsp/dec_mips32.c b/thirdparty/libwebp/dsp/dec_mips32.c new file mode 100644 index 0000000000..4e9ef42605 --- /dev/null +++ b/thirdparty/libwebp/dsp/dec_mips32.c @@ -0,0 +1,587 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS version of dsp functions +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) +// Jovan Zelincevic (jovan.zelincevic@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS32) + +#include "./mips_macro.h" + +static const int kC1 = 20091 + (1 << 16); +static const int kC2 = 35468; + +static WEBP_INLINE int abs_mips32(int x) { + const int sign = x >> 31; + return (x ^ sign) - sign; +} + +// 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) + VP8ksclip1[p1 - q1]; + const int a1 = VP8ksclip2[(a + 4) >> 3]; + 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 = VP8ksclip2[(a + 4) >> 3]; + const int a2 = VP8ksclip2[(a + 3) >> 3]; + const int a3 = (a1 + 1) >> 1; + 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 = 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] = 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 (abs_mips32(p1 - p0) > thresh) || (abs_mips32(q1 - q0) > 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 * abs_mips32(p0 - q0) + abs_mips32(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]; + const int p1 = p[-2 * step], p0 = p[-step]; + const int q0 = p[0], q1 = p[step], q2 = p[2 * step], q3 = p[3 * step]; + if ((4 * abs_mips32(p0 - q0) + abs_mips32(p1 - q1)) > t) { + return 0; + } + return abs_mips32(p3 - p2) <= it && abs_mips32(p2 - p1) <= it && + abs_mips32(p1 - p0) <= it && abs_mips32(q3 - q2) <= it && + abs_mips32(q2 - q1) <= it && abs_mips32(q1 - q0) <= it; +} + +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, thresh2, 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) { + const int thresh2 = 2 * thresh + 1; + while (size-- > 0) { + if (needs_filter2(p, hstride, thresh2, 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); +} + +// 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); +} + +// 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); + } +} + +//------------------------------------------------------------------------------ +// Simple In-loop filtering (Paragraph 15.2) + +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, thresh2)) { + do_filter2(p + i, stride); + } + } +} + +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, thresh2)) { + 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); + } +} + +static void TransformOne(const int16_t* in, uint8_t* dst) { + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8, temp9; + int temp10, temp11, temp12, temp13, temp14; + int temp15, temp16, temp17, temp18; + int16_t* p_in = (int16_t*)in; + + // loops unrolled and merged to avoid usage of tmp buffer + // and to reduce number of stalls. MUL macro is written + // in assembler and inlined + __asm__ volatile( + "lh %[temp0], 0(%[in]) \n\t" + "lh %[temp8], 16(%[in]) \n\t" + "lh %[temp4], 8(%[in]) \n\t" + "lh %[temp12], 24(%[in]) \n\t" + "addu %[temp16], %[temp0], %[temp8] \n\t" + "subu %[temp0], %[temp0], %[temp8] \n\t" + "mul %[temp8], %[temp4], %[kC2] \n\t" + "mul %[temp17], %[temp12], %[kC1] \n\t" + "mul %[temp4], %[temp4], %[kC1] \n\t" + "mul %[temp12], %[temp12], %[kC2] \n\t" + "lh %[temp1], 2(%[in]) \n\t" + "lh %[temp5], 10(%[in]) \n\t" + "lh %[temp9], 18(%[in]) \n\t" + "lh %[temp13], 26(%[in]) \n\t" + "sra %[temp8], %[temp8], 16 \n\t" + "sra %[temp17], %[temp17], 16 \n\t" + "sra %[temp4], %[temp4], 16 \n\t" + "sra %[temp12], %[temp12], 16 \n\t" + "lh %[temp2], 4(%[in]) \n\t" + "lh %[temp6], 12(%[in]) \n\t" + "lh %[temp10], 20(%[in]) \n\t" + "lh %[temp14], 28(%[in]) \n\t" + "subu %[temp17], %[temp8], %[temp17] \n\t" + "addu %[temp4], %[temp4], %[temp12] \n\t" + "addu %[temp8], %[temp16], %[temp4] \n\t" + "subu %[temp4], %[temp16], %[temp4] \n\t" + "addu %[temp16], %[temp1], %[temp9] \n\t" + "subu %[temp1], %[temp1], %[temp9] \n\t" + "lh %[temp3], 6(%[in]) \n\t" + "lh %[temp7], 14(%[in]) \n\t" + "lh %[temp11], 22(%[in]) \n\t" + "lh %[temp15], 30(%[in]) \n\t" + "addu %[temp12], %[temp0], %[temp17] \n\t" + "subu %[temp0], %[temp0], %[temp17] \n\t" + "mul %[temp9], %[temp5], %[kC2] \n\t" + "mul %[temp17], %[temp13], %[kC1] \n\t" + "mul %[temp5], %[temp5], %[kC1] \n\t" + "mul %[temp13], %[temp13], %[kC2] \n\t" + "sra %[temp9], %[temp9], 16 \n\t" + "sra %[temp17], %[temp17], 16 \n\t" + "subu %[temp17], %[temp9], %[temp17] \n\t" + "sra %[temp5], %[temp5], 16 \n\t" + "sra %[temp13], %[temp13], 16 \n\t" + "addu %[temp5], %[temp5], %[temp13] \n\t" + "addu %[temp13], %[temp1], %[temp17] \n\t" + "subu %[temp1], %[temp1], %[temp17] \n\t" + "mul %[temp17], %[temp14], %[kC1] \n\t" + "mul %[temp14], %[temp14], %[kC2] \n\t" + "addu %[temp9], %[temp16], %[temp5] \n\t" + "subu %[temp5], %[temp16], %[temp5] \n\t" + "addu %[temp16], %[temp2], %[temp10] \n\t" + "subu %[temp2], %[temp2], %[temp10] \n\t" + "mul %[temp10], %[temp6], %[kC2] \n\t" + "mul %[temp6], %[temp6], %[kC1] \n\t" + "sra %[temp17], %[temp17], 16 \n\t" + "sra %[temp14], %[temp14], 16 \n\t" + "sra %[temp10], %[temp10], 16 \n\t" + "sra %[temp6], %[temp6], 16 \n\t" + "subu %[temp17], %[temp10], %[temp17] \n\t" + "addu %[temp6], %[temp6], %[temp14] \n\t" + "addu %[temp10], %[temp16], %[temp6] \n\t" + "subu %[temp6], %[temp16], %[temp6] \n\t" + "addu %[temp14], %[temp2], %[temp17] \n\t" + "subu %[temp2], %[temp2], %[temp17] \n\t" + "mul %[temp17], %[temp15], %[kC1] \n\t" + "mul %[temp15], %[temp15], %[kC2] \n\t" + "addu %[temp16], %[temp3], %[temp11] \n\t" + "subu %[temp3], %[temp3], %[temp11] \n\t" + "mul %[temp11], %[temp7], %[kC2] \n\t" + "mul %[temp7], %[temp7], %[kC1] \n\t" + "addiu %[temp8], %[temp8], 4 \n\t" + "addiu %[temp12], %[temp12], 4 \n\t" + "addiu %[temp0], %[temp0], 4 \n\t" + "addiu %[temp4], %[temp4], 4 \n\t" + "sra %[temp17], %[temp17], 16 \n\t" + "sra %[temp15], %[temp15], 16 \n\t" + "sra %[temp11], %[temp11], 16 \n\t" + "sra %[temp7], %[temp7], 16 \n\t" + "subu %[temp17], %[temp11], %[temp17] \n\t" + "addu %[temp7], %[temp7], %[temp15] \n\t" + "addu %[temp15], %[temp3], %[temp17] \n\t" + "subu %[temp3], %[temp3], %[temp17] \n\t" + "addu %[temp11], %[temp16], %[temp7] \n\t" + "subu %[temp7], %[temp16], %[temp7] \n\t" + "addu %[temp16], %[temp8], %[temp10] \n\t" + "subu %[temp8], %[temp8], %[temp10] \n\t" + "mul %[temp10], %[temp9], %[kC2] \n\t" + "mul %[temp17], %[temp11], %[kC1] \n\t" + "mul %[temp9], %[temp9], %[kC1] \n\t" + "mul %[temp11], %[temp11], %[kC2] \n\t" + "sra %[temp10], %[temp10], 16 \n\t" + "sra %[temp17], %[temp17], 16 \n\t" + "sra %[temp9], %[temp9], 16 \n\t" + "sra %[temp11], %[temp11], 16 \n\t" + "subu %[temp17], %[temp10], %[temp17] \n\t" + "addu %[temp11], %[temp9], %[temp11] \n\t" + "addu %[temp10], %[temp12], %[temp14] \n\t" + "subu %[temp12], %[temp12], %[temp14] \n\t" + "mul %[temp14], %[temp13], %[kC2] \n\t" + "mul %[temp9], %[temp15], %[kC1] \n\t" + "mul %[temp13], %[temp13], %[kC1] \n\t" + "mul %[temp15], %[temp15], %[kC2] \n\t" + "sra %[temp14], %[temp14], 16 \n\t" + "sra %[temp9], %[temp9], 16 \n\t" + "sra %[temp13], %[temp13], 16 \n\t" + "sra %[temp15], %[temp15], 16 \n\t" + "subu %[temp9], %[temp14], %[temp9] \n\t" + "addu %[temp15], %[temp13], %[temp15] \n\t" + "addu %[temp14], %[temp0], %[temp2] \n\t" + "subu %[temp0], %[temp0], %[temp2] \n\t" + "mul %[temp2], %[temp1], %[kC2] \n\t" + "mul %[temp13], %[temp3], %[kC1] \n\t" + "mul %[temp1], %[temp1], %[kC1] \n\t" + "mul %[temp3], %[temp3], %[kC2] \n\t" + "sra %[temp2], %[temp2], 16 \n\t" + "sra %[temp13], %[temp13], 16 \n\t" + "sra %[temp1], %[temp1], 16 \n\t" + "sra %[temp3], %[temp3], 16 \n\t" + "subu %[temp13], %[temp2], %[temp13] \n\t" + "addu %[temp3], %[temp1], %[temp3] \n\t" + "addu %[temp2], %[temp4], %[temp6] \n\t" + "subu %[temp4], %[temp4], %[temp6] \n\t" + "mul %[temp6], %[temp5], %[kC2] \n\t" + "mul %[temp1], %[temp7], %[kC1] \n\t" + "mul %[temp5], %[temp5], %[kC1] \n\t" + "mul %[temp7], %[temp7], %[kC2] \n\t" + "sra %[temp6], %[temp6], 16 \n\t" + "sra %[temp1], %[temp1], 16 \n\t" + "sra %[temp5], %[temp5], 16 \n\t" + "sra %[temp7], %[temp7], 16 \n\t" + "subu %[temp1], %[temp6], %[temp1] \n\t" + "addu %[temp7], %[temp5], %[temp7] \n\t" + "addu %[temp5], %[temp16], %[temp11] \n\t" + "subu %[temp16], %[temp16], %[temp11] \n\t" + "addu %[temp11], %[temp8], %[temp17] \n\t" + "subu %[temp8], %[temp8], %[temp17] \n\t" + "sra %[temp5], %[temp5], 3 \n\t" + "sra %[temp16], %[temp16], 3 \n\t" + "sra %[temp11], %[temp11], 3 \n\t" + "sra %[temp8], %[temp8], 3 \n\t" + "addu %[temp17], %[temp10], %[temp15] \n\t" + "subu %[temp10], %[temp10], %[temp15] \n\t" + "addu %[temp15], %[temp12], %[temp9] \n\t" + "subu %[temp12], %[temp12], %[temp9] \n\t" + "sra %[temp17], %[temp17], 3 \n\t" + "sra %[temp10], %[temp10], 3 \n\t" + "sra %[temp15], %[temp15], 3 \n\t" + "sra %[temp12], %[temp12], 3 \n\t" + "addu %[temp9], %[temp14], %[temp3] \n\t" + "subu %[temp14], %[temp14], %[temp3] \n\t" + "addu %[temp3], %[temp0], %[temp13] \n\t" + "subu %[temp0], %[temp0], %[temp13] \n\t" + "sra %[temp9], %[temp9], 3 \n\t" + "sra %[temp14], %[temp14], 3 \n\t" + "sra %[temp3], %[temp3], 3 \n\t" + "sra %[temp0], %[temp0], 3 \n\t" + "addu %[temp13], %[temp2], %[temp7] \n\t" + "subu %[temp2], %[temp2], %[temp7] \n\t" + "addu %[temp7], %[temp4], %[temp1] \n\t" + "subu %[temp4], %[temp4], %[temp1] \n\t" + "sra %[temp13], %[temp13], 3 \n\t" + "sra %[temp2], %[temp2], 3 \n\t" + "sra %[temp7], %[temp7], 3 \n\t" + "sra %[temp4], %[temp4], 3 \n\t" + "addiu %[temp6], $zero, 255 \n\t" + "lbu %[temp1], 0+0*" XSTR(BPS) "(%[dst]) \n\t" + "addu %[temp1], %[temp1], %[temp5] \n\t" + "sra %[temp5], %[temp1], 8 \n\t" + "sra %[temp18], %[temp1], 31 \n\t" + "beqz %[temp5], 1f \n\t" + "xor %[temp1], %[temp1], %[temp1] \n\t" + "movz %[temp1], %[temp6], %[temp18] \n\t" + "1: \n\t" + "lbu %[temp18], 1+0*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp1], 0+0*" XSTR(BPS) "(%[dst]) \n\t" + "addu %[temp18], %[temp18], %[temp11] \n\t" + "sra %[temp11], %[temp18], 8 \n\t" + "sra %[temp1], %[temp18], 31 \n\t" + "beqz %[temp11], 2f \n\t" + "xor %[temp18], %[temp18], %[temp18] \n\t" + "movz %[temp18], %[temp6], %[temp1] \n\t" + "2: \n\t" + "lbu %[temp1], 2+0*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp18], 1+0*" XSTR(BPS) "(%[dst]) \n\t" + "addu %[temp1], %[temp1], %[temp8] \n\t" + "sra %[temp8], %[temp1], 8 \n\t" + "sra %[temp18], %[temp1], 31 \n\t" + "beqz %[temp8], 3f \n\t" + "xor %[temp1], %[temp1], %[temp1] \n\t" + "movz %[temp1], %[temp6], %[temp18] \n\t" + "3: \n\t" + "lbu %[temp18], 3+0*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp1], 2+0*" XSTR(BPS) "(%[dst]) \n\t" + "addu %[temp18], %[temp18], %[temp16] \n\t" + "sra %[temp16], %[temp18], 8 \n\t" + "sra %[temp1], %[temp18], 31 \n\t" + "beqz %[temp16], 4f \n\t" + "xor %[temp18], %[temp18], %[temp18] \n\t" + "movz %[temp18], %[temp6], %[temp1] \n\t" + "4: \n\t" + "sb %[temp18], 3+0*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp5], 0+1*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp8], 1+1*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp11], 2+1*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp16], 3+1*" XSTR(BPS) "(%[dst]) \n\t" + "addu %[temp5], %[temp5], %[temp17] \n\t" + "addu %[temp8], %[temp8], %[temp15] \n\t" + "addu %[temp11], %[temp11], %[temp12] \n\t" + "addu %[temp16], %[temp16], %[temp10] \n\t" + "sra %[temp18], %[temp5], 8 \n\t" + "sra %[temp1], %[temp5], 31 \n\t" + "beqz %[temp18], 5f \n\t" + "xor %[temp5], %[temp5], %[temp5] \n\t" + "movz %[temp5], %[temp6], %[temp1] \n\t" + "5: \n\t" + "sra %[temp18], %[temp8], 8 \n\t" + "sra %[temp1], %[temp8], 31 \n\t" + "beqz %[temp18], 6f \n\t" + "xor %[temp8], %[temp8], %[temp8] \n\t" + "movz %[temp8], %[temp6], %[temp1] \n\t" + "6: \n\t" + "sra %[temp18], %[temp11], 8 \n\t" + "sra %[temp1], %[temp11], 31 \n\t" + "sra %[temp17], %[temp16], 8 \n\t" + "sra %[temp15], %[temp16], 31 \n\t" + "beqz %[temp18], 7f \n\t" + "xor %[temp11], %[temp11], %[temp11] \n\t" + "movz %[temp11], %[temp6], %[temp1] \n\t" + "7: \n\t" + "beqz %[temp17], 8f \n\t" + "xor %[temp16], %[temp16], %[temp16] \n\t" + "movz %[temp16], %[temp6], %[temp15] \n\t" + "8: \n\t" + "sb %[temp5], 0+1*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp8], 1+1*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp11], 2+1*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp16], 3+1*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp5], 0+2*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp8], 1+2*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp11], 2+2*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp16], 3+2*" XSTR(BPS) "(%[dst]) \n\t" + "addu %[temp5], %[temp5], %[temp9] \n\t" + "addu %[temp8], %[temp8], %[temp3] \n\t" + "addu %[temp11], %[temp11], %[temp0] \n\t" + "addu %[temp16], %[temp16], %[temp14] \n\t" + "sra %[temp18], %[temp5], 8 \n\t" + "sra %[temp1], %[temp5], 31 \n\t" + "sra %[temp17], %[temp8], 8 \n\t" + "sra %[temp15], %[temp8], 31 \n\t" + "sra %[temp12], %[temp11], 8 \n\t" + "sra %[temp10], %[temp11], 31 \n\t" + "sra %[temp9], %[temp16], 8 \n\t" + "sra %[temp3], %[temp16], 31 \n\t" + "beqz %[temp18], 9f \n\t" + "xor %[temp5], %[temp5], %[temp5] \n\t" + "movz %[temp5], %[temp6], %[temp1] \n\t" + "9: \n\t" + "beqz %[temp17], 10f \n\t" + "xor %[temp8], %[temp8], %[temp8] \n\t" + "movz %[temp8], %[temp6], %[temp15] \n\t" + "10: \n\t" + "beqz %[temp12], 11f \n\t" + "xor %[temp11], %[temp11], %[temp11] \n\t" + "movz %[temp11], %[temp6], %[temp10] \n\t" + "11: \n\t" + "beqz %[temp9], 12f \n\t" + "xor %[temp16], %[temp16], %[temp16] \n\t" + "movz %[temp16], %[temp6], %[temp3] \n\t" + "12: \n\t" + "sb %[temp5], 0+2*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp8], 1+2*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp11], 2+2*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp16], 3+2*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp5], 0+3*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp8], 1+3*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp11], 2+3*" XSTR(BPS) "(%[dst]) \n\t" + "lbu %[temp16], 3+3*" XSTR(BPS) "(%[dst]) \n\t" + "addu %[temp5], %[temp5], %[temp13] \n\t" + "addu %[temp8], %[temp8], %[temp7] \n\t" + "addu %[temp11], %[temp11], %[temp4] \n\t" + "addu %[temp16], %[temp16], %[temp2] \n\t" + "sra %[temp18], %[temp5], 8 \n\t" + "sra %[temp1], %[temp5], 31 \n\t" + "sra %[temp17], %[temp8], 8 \n\t" + "sra %[temp15], %[temp8], 31 \n\t" + "sra %[temp12], %[temp11], 8 \n\t" + "sra %[temp10], %[temp11], 31 \n\t" + "sra %[temp9], %[temp16], 8 \n\t" + "sra %[temp3], %[temp16], 31 \n\t" + "beqz %[temp18], 13f \n\t" + "xor %[temp5], %[temp5], %[temp5] \n\t" + "movz %[temp5], %[temp6], %[temp1] \n\t" + "13: \n\t" + "beqz %[temp17], 14f \n\t" + "xor %[temp8], %[temp8], %[temp8] \n\t" + "movz %[temp8], %[temp6], %[temp15] \n\t" + "14: \n\t" + "beqz %[temp12], 15f \n\t" + "xor %[temp11], %[temp11], %[temp11] \n\t" + "movz %[temp11], %[temp6], %[temp10] \n\t" + "15: \n\t" + "beqz %[temp9], 16f \n\t" + "xor %[temp16], %[temp16], %[temp16] \n\t" + "movz %[temp16], %[temp6], %[temp3] \n\t" + "16: \n\t" + "sb %[temp5], 0+3*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp8], 1+3*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp11], 2+3*" XSTR(BPS) "(%[dst]) \n\t" + "sb %[temp16], 3+3*" XSTR(BPS) "(%[dst]) \n\t" + + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), [temp11]"=&r"(temp11), + [temp12]"=&r"(temp12), [temp13]"=&r"(temp13), [temp14]"=&r"(temp14), + [temp15]"=&r"(temp15), [temp16]"=&r"(temp16), [temp17]"=&r"(temp17), + [temp18]"=&r"(temp18) + : [in]"r"(p_in), [kC1]"r"(kC1), [kC2]"r"(kC2), [dst]"r"(dst) + : "memory", "hi", "lo" + ); +} + +static void TransformTwo(const int16_t* in, uint8_t* dst, int do_two) { + TransformOne(in, dst); + if (do_two) { + TransformOne(in + 16, dst + 4); + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8DspInitMIPS32(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitMIPS32(void) { + VP8InitClipTables(); + + VP8Transform = TransformTwo; + + VP8VFilter16 = VFilter16; + VP8HFilter16 = HFilter16; + VP8VFilter8 = VFilter8; + VP8HFilter8 = HFilter8; + VP8VFilter16i = VFilter16i; + VP8HFilter16i = HFilter16i; + VP8VFilter8i = VFilter8i; + VP8HFilter8i = HFilter8i; + + VP8SimpleVFilter16 = SimpleVFilter16; + VP8SimpleHFilter16 = SimpleHFilter16; + VP8SimpleVFilter16i = SimpleVFilter16i; + VP8SimpleHFilter16i = SimpleHFilter16i; +} + +#else // !WEBP_USE_MIPS32 + +WEBP_DSP_INIT_STUB(VP8DspInitMIPS32) + +#endif // WEBP_USE_MIPS32 diff --git a/thirdparty/libwebp/dsp/dec_mips_dsp_r2.c b/thirdparty/libwebp/dsp/dec_mips_dsp_r2.c new file mode 100644 index 0000000000..db5c657228 --- /dev/null +++ b/thirdparty/libwebp/dsp/dec_mips_dsp_r2.c @@ -0,0 +1,994 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS version of dsp functions +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) +// Jovan Zelincevic (jovan.zelincevic@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include "./mips_macro.h" + +static const int kC1 = 20091 + (1 << 16); +static const int kC2 = 35468; + +#define MUL(a, b) (((a) * (b)) >> 16) + +static void TransformDC(const int16_t* in, uint8_t* dst) { + int temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, temp9, temp10; + + __asm__ volatile ( + LOAD_WITH_OFFSET_X4(temp1, temp2, temp3, temp4, dst, + 0, 0, 0, 0, + 0, 1, 2, 3, + BPS) + "lh %[temp5], 0(%[in]) \n\t" + "addiu %[temp5], %[temp5], 4 \n\t" + "ins %[temp5], %[temp5], 16, 16 \n\t" + "shra.ph %[temp5], %[temp5], 3 \n\t" + CONVERT_2_BYTES_TO_HALF(temp6, temp7, temp8, temp9, temp10, temp1, temp2, + temp3, temp1, temp2, temp3, temp4) + STORE_SAT_SUM_X2(temp6, temp7, temp8, temp9, temp10, temp1, temp2, temp3, + temp5, temp5, temp5, temp5, temp5, temp5, temp5, temp5, + dst, 0, 1, 2, 3, BPS) + + OUTPUT_EARLY_CLOBBER_REGS_10() + : [in]"r"(in), [dst]"r"(dst) + : "memory" + ); +} + +static void TransformAC3(const int16_t* in, uint8_t* dst) { + const int a = in[0] + 4; + int c4 = MUL(in[4], kC2); + const int d4 = MUL(in[4], kC1); + const int c1 = MUL(in[1], kC2); + const int d1 = MUL(in[1], kC1); + int temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, temp9; + int temp10, temp11, temp12, temp13, temp14, temp15, temp16, temp17, temp18; + + __asm__ volatile ( + "ins %[c4], %[d4], 16, 16 \n\t" + "replv.ph %[temp1], %[a] \n\t" + "replv.ph %[temp4], %[d1] \n\t" + ADD_SUB_HALVES(temp2, temp3, temp1, c4) + "replv.ph %[temp5], %[c1] \n\t" + SHIFT_R_SUM_X2(temp1, temp6, temp7, temp8, temp2, temp9, temp10, temp4, + temp2, temp2, temp3, temp3, temp4, temp5, temp4, temp5) + LOAD_WITH_OFFSET_X4(temp3, temp5, temp11, temp12, dst, + 0, 0, 0, 0, + 0, 1, 2, 3, + BPS) + CONVERT_2_BYTES_TO_HALF(temp13, temp14, temp3, temp15, temp5, temp16, + temp11, temp17, temp3, temp5, temp11, temp12) + PACK_2_HALVES_TO_WORD(temp12, temp18, temp7, temp6, temp1, temp8, temp2, + temp4, temp7, temp6, temp10, temp9) + STORE_SAT_SUM_X2(temp13, temp14, temp3, temp15, temp5, temp16, temp11, + temp17, temp12, temp18, temp1, temp8, temp2, temp4, + temp7, temp6, dst, 0, 1, 2, 3, BPS) + + OUTPUT_EARLY_CLOBBER_REGS_18(), + [c4]"+&r"(c4) + : [dst]"r"(dst), [a]"r"(a), [d1]"r"(d1), [d4]"r"(d4), [c1]"r"(c1) + : "memory" + ); +} + +static void TransformOne(const int16_t* in, uint8_t* dst) { + int temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, temp9; + int temp10, temp11, temp12, temp13, temp14, temp15, temp16, temp17, temp18; + + __asm__ volatile ( + "ulw %[temp1], 0(%[in]) \n\t" + "ulw %[temp2], 16(%[in]) \n\t" + LOAD_IN_X2(temp5, temp6, 24, 26) + ADD_SUB_HALVES(temp3, temp4, temp1, temp2) + LOAD_IN_X2(temp1, temp2, 8, 10) + MUL_SHIFT_SUM(temp7, temp8, temp9, temp10, temp11, temp12, temp13, temp14, + temp10, temp8, temp9, temp7, temp1, temp2, temp5, temp6, + temp13, temp11, temp14, temp12) + INSERT_HALF_X2(temp8, temp7, temp10, temp9) + "ulw %[temp17], 4(%[in]) \n\t" + "ulw %[temp18], 20(%[in]) \n\t" + ADD_SUB_HALVES(temp1, temp2, temp3, temp8) + ADD_SUB_HALVES(temp5, temp6, temp4, temp7) + ADD_SUB_HALVES(temp7, temp8, temp17, temp18) + LOAD_IN_X2(temp17, temp18, 12, 14) + LOAD_IN_X2(temp9, temp10, 28, 30) + MUL_SHIFT_SUM(temp11, temp12, temp13, temp14, temp15, temp16, temp4, temp17, + temp12, temp14, temp11, temp13, temp17, temp18, temp9, temp10, + temp15, temp4, temp16, temp17) + INSERT_HALF_X2(temp11, temp12, temp13, temp14) + ADD_SUB_HALVES(temp17, temp8, temp8, temp11) + ADD_SUB_HALVES(temp3, temp4, temp7, temp12) + + // horizontal + SRA_16(temp9, temp10, temp11, temp12, temp1, temp2, temp5, temp6) + INSERT_HALF_X2(temp1, temp6, temp5, temp2) + SRA_16(temp13, temp14, temp15, temp16, temp3, temp4, temp17, temp8) + "repl.ph %[temp2], 0x4 \n\t" + INSERT_HALF_X2(temp3, temp8, temp17, temp4) + "addq.ph %[temp1], %[temp1], %[temp2] \n\t" + "addq.ph %[temp6], %[temp6], %[temp2] \n\t" + ADD_SUB_HALVES(temp2, temp4, temp1, temp3) + ADD_SUB_HALVES(temp5, temp7, temp6, temp8) + MUL_SHIFT_SUM(temp1, temp3, temp6, temp8, temp9, temp13, temp17, temp18, + temp3, temp13, temp1, temp9, temp9, temp13, temp11, temp15, + temp6, temp17, temp8, temp18) + MUL_SHIFT_SUM(temp6, temp8, temp18, temp17, temp11, temp15, temp12, temp16, + temp8, temp15, temp6, temp11, temp12, temp16, temp10, temp14, + temp18, temp12, temp17, temp16) + INSERT_HALF_X2(temp1, temp3, temp9, temp13) + INSERT_HALF_X2(temp6, temp8, temp11, temp15) + SHIFT_R_SUM_X2(temp9, temp10, temp11, temp12, temp13, temp14, temp15, + temp16, temp2, temp4, temp5, temp7, temp3, temp1, temp8, + temp6) + PACK_2_HALVES_TO_WORD(temp1, temp2, temp3, temp4, temp9, temp12, temp13, + temp16, temp11, temp10, temp15, temp14) + LOAD_WITH_OFFSET_X4(temp10, temp11, temp14, temp15, dst, + 0, 0, 0, 0, + 0, 1, 2, 3, + BPS) + CONVERT_2_BYTES_TO_HALF(temp5, temp6, temp7, temp8, temp17, temp18, temp10, + temp11, temp10, temp11, temp14, temp15) + STORE_SAT_SUM_X2(temp5, temp6, temp7, temp8, temp17, temp18, temp10, temp11, + temp9, temp12, temp1, temp2, temp13, temp16, temp3, temp4, + dst, 0, 1, 2, 3, BPS) + + OUTPUT_EARLY_CLOBBER_REGS_18() + : [dst]"r"(dst), [in]"r"(in), [kC1]"r"(kC1), [kC2]"r"(kC2) + : "memory", "hi", "lo" + ); +} + +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 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; + int temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, temp9; + int temp10, temp11, temp12, temp13, temp14, temp15; + + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "1: \n\t" + "negu %[temp1], %[hstride] \n\t" + "addiu %[size], %[size], -1 \n\t" + "sll %[temp2], %[hstride], 1 \n\t" + "sll %[temp3], %[temp1], 1 \n\t" + "addu %[temp4], %[temp2], %[hstride] \n\t" + "addu %[temp5], %[temp3], %[temp1] \n\t" + "lbu %[temp7], 0(%[p]) \n\t" + "sll %[temp6], %[temp3], 1 \n\t" + "lbux %[temp8], %[temp5](%[p]) \n\t" + "lbux %[temp9], %[temp3](%[p]) \n\t" + "lbux %[temp10], %[temp1](%[p]) \n\t" + "lbux %[temp11], %[temp6](%[p]) \n\t" + "lbux %[temp12], %[hstride](%[p]) \n\t" + "lbux %[temp13], %[temp2](%[p]) \n\t" + "lbux %[temp14], %[temp4](%[p]) \n\t" + "subu %[temp1], %[temp10], %[temp7] \n\t" + "subu %[temp2], %[temp9], %[temp12] \n\t" + "absq_s.w %[temp3], %[temp1] \n\t" + "absq_s.w %[temp4], %[temp2] \n\t" + "negu %[temp1], %[temp1] \n\t" + "sll %[temp3], %[temp3], 2 \n\t" + "addu %[temp15], %[temp3], %[temp4] \n\t" + "subu %[temp3], %[temp15], %[thresh2] \n\t" + "sll %[temp6], %[temp1], 1 \n\t" + "bgtz %[temp3], 3f \n\t" + " subu %[temp4], %[temp11], %[temp8] \n\t" + "absq_s.w %[temp4], %[temp4] \n\t" + "shll_s.w %[temp2], %[temp2], 24 \n\t" + "subu %[temp4], %[temp4], %[ithresh] \n\t" + "bgtz %[temp4], 3f \n\t" + " subu %[temp3], %[temp8], %[temp9] \n\t" + "absq_s.w %[temp3], %[temp3] \n\t" + "subu %[temp3], %[temp3], %[ithresh] \n\t" + "bgtz %[temp3], 3f \n\t" + " subu %[temp5], %[temp9], %[temp10] \n\t" + "absq_s.w %[temp3], %[temp5] \n\t" + "absq_s.w %[temp5], %[temp5] \n\t" + "subu %[temp3], %[temp3], %[ithresh] \n\t" + "bgtz %[temp3], 3f \n\t" + " subu %[temp3], %[temp14], %[temp13] \n\t" + "absq_s.w %[temp3], %[temp3] \n\t" + "slt %[temp5], %[hev_thresh], %[temp5] \n\t" + "subu %[temp3], %[temp3], %[ithresh] \n\t" + "bgtz %[temp3], 3f \n\t" + " subu %[temp3], %[temp13], %[temp12] \n\t" + "absq_s.w %[temp3], %[temp3] \n\t" + "sra %[temp4], %[temp2], 24 \n\t" + "subu %[temp3], %[temp3], %[ithresh] \n\t" + "bgtz %[temp3], 3f \n\t" + " subu %[temp15], %[temp12], %[temp7] \n\t" + "absq_s.w %[temp3], %[temp15] \n\t" + "absq_s.w %[temp15], %[temp15] \n\t" + "subu %[temp3], %[temp3], %[ithresh] \n\t" + "bgtz %[temp3], 3f \n\t" + " slt %[temp15], %[hev_thresh], %[temp15] \n\t" + "addu %[temp3], %[temp6], %[temp1] \n\t" + "or %[temp2], %[temp5], %[temp15] \n\t" + "addu %[temp5], %[temp4], %[temp3] \n\t" + "beqz %[temp2], 4f \n\t" + " shra_r.w %[temp1], %[temp5], 3 \n\t" + "addiu %[temp2], %[temp5], 3 \n\t" + "sra %[temp2], %[temp2], 3 \n\t" + "shll_s.w %[temp1], %[temp1], 27 \n\t" + "shll_s.w %[temp2], %[temp2], 27 \n\t" + "subu %[temp3], %[p], %[hstride] \n\t" + "sra %[temp1], %[temp1], 27 \n\t" + "sra %[temp2], %[temp2], 27 \n\t" + "subu %[temp1], %[temp7], %[temp1] \n\t" + "addu %[temp2], %[temp10], %[temp2] \n\t" + "lbux %[temp2], %[temp2](%[VP8kclip1]) \n\t" + "lbux %[temp1], %[temp1](%[VP8kclip1]) \n\t" + "sb %[temp2], 0(%[temp3]) \n\t" + "j 3f \n\t" + " sb %[temp1], 0(%[p]) \n\t" + "4: \n\t" + "shll_s.w %[temp5], %[temp5], 24 \n\t" + "subu %[temp14], %[p], %[hstride] \n\t" + "subu %[temp11], %[temp14], %[hstride] \n\t" + "sra %[temp6], %[temp5], 24 \n\t" + "sll %[temp1], %[temp6], 3 \n\t" + "subu %[temp15], %[temp11], %[hstride] \n\t" + "addu %[temp2], %[temp6], %[temp1] \n\t" + "sll %[temp3], %[temp2], 1 \n\t" + "addu %[temp4], %[temp3], %[temp2] \n\t" + "addiu %[temp2], %[temp2], 63 \n\t" + "addiu %[temp3], %[temp3], 63 \n\t" + "addiu %[temp4], %[temp4], 63 \n\t" + "sra %[temp2], %[temp2], 7 \n\t" + "sra %[temp3], %[temp3], 7 \n\t" + "sra %[temp4], %[temp4], 7 \n\t" + "addu %[temp1], %[temp8], %[temp2] \n\t" + "addu %[temp5], %[temp9], %[temp3] \n\t" + "addu %[temp6], %[temp10], %[temp4] \n\t" + "subu %[temp8], %[temp7], %[temp4] \n\t" + "subu %[temp7], %[temp12], %[temp3] \n\t" + "addu %[temp10], %[p], %[hstride] \n\t" + "subu %[temp9], %[temp13], %[temp2] \n\t" + "addu %[temp12], %[temp10], %[hstride] \n\t" + "lbux %[temp2], %[temp1](%[VP8kclip1]) \n\t" + "lbux %[temp3], %[temp5](%[VP8kclip1]) \n\t" + "lbux %[temp4], %[temp6](%[VP8kclip1]) \n\t" + "lbux %[temp5], %[temp8](%[VP8kclip1]) \n\t" + "lbux %[temp6], %[temp7](%[VP8kclip1]) \n\t" + "lbux %[temp8], %[temp9](%[VP8kclip1]) \n\t" + "sb %[temp2], 0(%[temp15]) \n\t" + "sb %[temp3], 0(%[temp11]) \n\t" + "sb %[temp4], 0(%[temp14]) \n\t" + "sb %[temp5], 0(%[p]) \n\t" + "sb %[temp6], 0(%[temp10]) \n\t" + "sb %[temp8], 0(%[temp12]) \n\t" + "3: \n\t" + "bgtz %[size], 1b \n\t" + " addu %[p], %[p], %[vstride] \n\t" + ".set pop \n\t" + : [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),[temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6), + [temp7]"=&r"(temp7),[temp8]"=&r"(temp8),[temp9]"=&r"(temp9), + [temp10]"=&r"(temp10),[temp11]"=&r"(temp11),[temp12]"=&r"(temp12), + [temp13]"=&r"(temp13),[temp14]"=&r"(temp14),[temp15]"=&r"(temp15), + [size]"+&r"(size), [p]"+&r"(p) + : [hstride]"r"(hstride), [thresh2]"r"(thresh2), + [ithresh]"r"(ithresh),[vstride]"r"(vstride), [hev_thresh]"r"(hev_thresh), + [VP8kclip1]"r"(VP8kclip1) + : "memory" + ); +} + +static WEBP_INLINE void FilterLoop24(uint8_t* p, + int hstride, int vstride, int size, + int thresh, int ithresh, int hev_thresh) { + int p0, q0, p1, q1, p2, q2, p3, q3; + int step1, step2, temp1, temp2, temp3, temp4; + uint8_t* pTemp0; + uint8_t* pTemp1; + const int thresh2 = 2 * thresh + 1; + + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "bltz %[size], 3f \n\t" + " nop \n\t" + "2: \n\t" + "negu %[step1], %[hstride] \n\t" + "lbu %[q0], 0(%[p]) \n\t" + "lbux %[p0], %[step1](%[p]) \n\t" + "subu %[step1], %[step1], %[hstride] \n\t" + "lbux %[q1], %[hstride](%[p]) \n\t" + "subu %[temp1], %[p0], %[q0] \n\t" + "lbux %[p1], %[step1](%[p]) \n\t" + "addu %[step2], %[hstride], %[hstride] \n\t" + "absq_s.w %[temp2], %[temp1] \n\t" + "subu %[temp3], %[p1], %[q1] \n\t" + "absq_s.w %[temp4], %[temp3] \n\t" + "sll %[temp2], %[temp2], 2 \n\t" + "addu %[temp2], %[temp2], %[temp4] \n\t" + "subu %[temp4], %[temp2], %[thresh2] \n\t" + "subu %[step1], %[step1], %[hstride] \n\t" + "bgtz %[temp4], 0f \n\t" + " lbux %[p2], %[step1](%[p]) \n\t" + "subu %[step1], %[step1], %[hstride] \n\t" + "lbux %[q2], %[step2](%[p]) \n\t" + "lbux %[p3], %[step1](%[p]) \n\t" + "subu %[temp4], %[p2], %[p1] \n\t" + "addu %[step2], %[step2], %[hstride] \n\t" + "subu %[temp2], %[p3], %[p2] \n\t" + "absq_s.w %[temp4], %[temp4] \n\t" + "absq_s.w %[temp2], %[temp2] \n\t" + "lbux %[q3], %[step2](%[p]) \n\t" + "subu %[temp4], %[temp4], %[ithresh] \n\t" + "negu %[temp1], %[temp1] \n\t" + "bgtz %[temp4], 0f \n\t" + " subu %[temp2], %[temp2], %[ithresh] \n\t" + "subu %[p3], %[p1], %[p0] \n\t" + "bgtz %[temp2], 0f \n\t" + " absq_s.w %[p3], %[p3] \n\t" + "subu %[temp4], %[q3], %[q2] \n\t" + "subu %[pTemp0], %[p], %[hstride] \n\t" + "absq_s.w %[temp4], %[temp4] \n\t" + "subu %[temp2], %[p3], %[ithresh] \n\t" + "sll %[step1], %[temp1], 1 \n\t" + "bgtz %[temp2], 0f \n\t" + " subu %[temp4], %[temp4], %[ithresh] \n\t" + "subu %[temp2], %[q2], %[q1] \n\t" + "bgtz %[temp4], 0f \n\t" + " absq_s.w %[temp2], %[temp2] \n\t" + "subu %[q3], %[q1], %[q0] \n\t" + "absq_s.w %[q3], %[q3] \n\t" + "subu %[temp2], %[temp2], %[ithresh] \n\t" + "addu %[temp1], %[temp1], %[step1] \n\t" + "bgtz %[temp2], 0f \n\t" + " subu %[temp4], %[q3], %[ithresh] \n\t" + "slt %[p3], %[hev_thresh], %[p3] \n\t" + "bgtz %[temp4], 0f \n\t" + " slt %[q3], %[hev_thresh], %[q3] \n\t" + "or %[q3], %[q3], %[p3] \n\t" + "bgtz %[q3], 1f \n\t" + " shra_r.w %[temp2], %[temp1], 3 \n\t" + "addiu %[temp1], %[temp1], 3 \n\t" + "sra %[temp1], %[temp1], 3 \n\t" + "shll_s.w %[temp2], %[temp2], 27 \n\t" + "shll_s.w %[temp1], %[temp1], 27 \n\t" + "addu %[pTemp1], %[p], %[hstride] \n\t" + "sra %[temp2], %[temp2], 27 \n\t" + "sra %[temp1], %[temp1], 27 \n\t" + "addiu %[step1], %[temp2], 1 \n\t" + "sra %[step1], %[step1], 1 \n\t" + "addu %[p0], %[p0], %[temp1] \n\t" + "addu %[p1], %[p1], %[step1] \n\t" + "subu %[q0], %[q0], %[temp2] \n\t" + "subu %[q1], %[q1], %[step1] \n\t" + "lbux %[temp2], %[p0](%[VP8kclip1]) \n\t" + "lbux %[temp3], %[q0](%[VP8kclip1]) \n\t" + "lbux %[temp4], %[q1](%[VP8kclip1]) \n\t" + "sb %[temp2], 0(%[pTemp0]) \n\t" + "lbux %[temp1], %[p1](%[VP8kclip1]) \n\t" + "subu %[pTemp0], %[pTemp0], %[hstride] \n\t" + "sb %[temp3], 0(%[p]) \n\t" + "sb %[temp4], 0(%[pTemp1]) \n\t" + "j 0f \n\t" + " sb %[temp1], 0(%[pTemp0]) \n\t" + "1: \n\t" + "shll_s.w %[temp3], %[temp3], 24 \n\t" + "sra %[temp3], %[temp3], 24 \n\t" + "addu %[temp1], %[temp1], %[temp3] \n\t" + "shra_r.w %[temp2], %[temp1], 3 \n\t" + "addiu %[temp1], %[temp1], 3 \n\t" + "shll_s.w %[temp2], %[temp2], 27 \n\t" + "sra %[temp1], %[temp1], 3 \n\t" + "shll_s.w %[temp1], %[temp1], 27 \n\t" + "sra %[temp2], %[temp2], 27 \n\t" + "sra %[temp1], %[temp1], 27 \n\t" + "addu %[p0], %[p0], %[temp1] \n\t" + "subu %[q0], %[q0], %[temp2] \n\t" + "lbux %[temp1], %[p0](%[VP8kclip1]) \n\t" + "lbux %[temp2], %[q0](%[VP8kclip1]) \n\t" + "sb %[temp2], 0(%[p]) \n\t" + "sb %[temp1], 0(%[pTemp0]) \n\t" + "0: \n\t" + "subu %[size], %[size], 1 \n\t" + "bgtz %[size], 2b \n\t" + " addu %[p], %[p], %[vstride] \n\t" + "3: \n\t" + ".set pop \n\t" + : [p0]"=&r"(p0), [q0]"=&r"(q0), [p1]"=&r"(p1), [q1]"=&r"(q1), + [p2]"=&r"(p2), [q2]"=&r"(q2), [p3]"=&r"(p3), [q3]"=&r"(q3), + [step2]"=&r"(step2), [step1]"=&r"(step1), [temp1]"=&r"(temp1), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), + [pTemp0]"=&r"(pTemp0), [pTemp1]"=&r"(pTemp1), [p]"+&r"(p), + [size]"+&r"(size) + : [vstride]"r"(vstride), [ithresh]"r"(ithresh), + [hev_thresh]"r"(hev_thresh), [hstride]"r"(hstride), + [VP8kclip1]"r"(VP8kclip1), [thresh2]"r"(thresh2) + : "memory" + ); +} + +// 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); +} + +// 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); +} + +// 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); +} + +#undef MUL + +//------------------------------------------------------------------------------ +// Simple In-loop filtering (Paragraph 15.2) + +static void SimpleVFilter16(uint8_t* p, int stride, int thresh) { + int i; + const int thresh2 = 2 * thresh + 1; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8; + uint8_t* p1 = p - stride; + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "li %[i], 16 \n\t" + "0: \n\t" + "negu %[temp4], %[stride] \n\t" + "sll %[temp5], %[temp4], 1 \n\t" + "lbu %[temp2], 0(%[p]) \n\t" + "lbux %[temp3], %[stride](%[p]) \n\t" + "lbux %[temp1], %[temp4](%[p]) \n\t" + "lbux %[temp0], %[temp5](%[p]) \n\t" + "subu %[temp7], %[temp1], %[temp2] \n\t" + "subu %[temp6], %[temp0], %[temp3] \n\t" + "absq_s.w %[temp4], %[temp7] \n\t" + "absq_s.w %[temp5], %[temp6] \n\t" + "sll %[temp4], %[temp4], 2 \n\t" + "subu %[temp5], %[temp5], %[thresh2] \n\t" + "addu %[temp5], %[temp4], %[temp5] \n\t" + "negu %[temp8], %[temp7] \n\t" + "bgtz %[temp5], 1f \n\t" + " addiu %[i], %[i], -1 \n\t" + "sll %[temp4], %[temp8], 1 \n\t" + "shll_s.w %[temp5], %[temp6], 24 \n\t" + "addu %[temp3], %[temp4], %[temp8] \n\t" + "sra %[temp5], %[temp5], 24 \n\t" + "addu %[temp3], %[temp3], %[temp5] \n\t" + "addiu %[temp7], %[temp3], 3 \n\t" + "sra %[temp7], %[temp7], 3 \n\t" + "shra_r.w %[temp8], %[temp3], 3 \n\t" + "shll_s.w %[temp0], %[temp7], 27 \n\t" + "shll_s.w %[temp4], %[temp8], 27 \n\t" + "sra %[temp0], %[temp0], 27 \n\t" + "sra %[temp4], %[temp4], 27 \n\t" + "addu %[temp7], %[temp1], %[temp0] \n\t" + "subu %[temp2], %[temp2], %[temp4] \n\t" + "lbux %[temp3], %[temp7](%[VP8kclip1]) \n\t" + "lbux %[temp4], %[temp2](%[VP8kclip1]) \n\t" + "sb %[temp3], 0(%[p1]) \n\t" + "sb %[temp4], 0(%[p]) \n\t" + "1: \n\t" + "addiu %[p1], %[p1], 1 \n\t" + "bgtz %[i], 0b \n\t" + " addiu %[p], %[p], 1 \n\t" + " .set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [p]"+&r"(p), [i]"=&r"(i), [p1]"+&r"(p1) + : [stride]"r"(stride), [VP8kclip1]"r"(VP8kclip1), [thresh2]"r"(thresh2) + : "memory" + ); +} + +// TEMP0 = SRC[A + A1 * BPS] +// TEMP1 = SRC[B + B1 * BPS] +// TEMP2 = SRC[C + C1 * BPS] +// TEMP3 = SRC[D + D1 * BPS] +#define LOAD_4_BYTES(TEMP0, TEMP1, TEMP2, TEMP3, \ + A, A1, B, B1, C, C1, D, D1, SRC) \ + "lbu %[" #TEMP0 "], " #A "+" #A1 "*" XSTR(BPS) "(%[" #SRC "]) \n\t" \ + "lbu %[" #TEMP1 "], " #B "+" #B1 "*" XSTR(BPS) "(%[" #SRC "]) \n\t" \ + "lbu %[" #TEMP2 "], " #C "+" #C1 "*" XSTR(BPS) "(%[" #SRC "]) \n\t" \ + "lbu %[" #TEMP3 "], " #D "+" #D1 "*" XSTR(BPS) "(%[" #SRC "]) \n\t" \ + +static void SimpleHFilter16(uint8_t* p, int stride, int thresh) { + int i; + const int thresh2 = 2 * thresh + 1; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8; + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "li %[i], 16 \n\t" + "0: \n\t" + LOAD_4_BYTES(temp0, temp1, temp2, temp3, -2, 0, -1, 0, 0, 0, 1, 0, p) + "subu %[temp7], %[temp1], %[temp2] \n\t" + "subu %[temp6], %[temp0], %[temp3] \n\t" + "absq_s.w %[temp4], %[temp7] \n\t" + "absq_s.w %[temp5], %[temp6] \n\t" + "sll %[temp4], %[temp4], 2 \n\t" + "addu %[temp5], %[temp4], %[temp5] \n\t" + "subu %[temp5], %[temp5], %[thresh2] \n\t" + "negu %[temp8], %[temp7] \n\t" + "bgtz %[temp5], 1f \n\t" + " addiu %[i], %[i], -1 \n\t" + "sll %[temp4], %[temp8], 1 \n\t" + "shll_s.w %[temp5], %[temp6], 24 \n\t" + "addu %[temp3], %[temp4], %[temp8] \n\t" + "sra %[temp5], %[temp5], 24 \n\t" + "addu %[temp3], %[temp3], %[temp5] \n\t" + "addiu %[temp7], %[temp3], 3 \n\t" + "sra %[temp7], %[temp7], 3 \n\t" + "shra_r.w %[temp8], %[temp3], 3 \n\t" + "shll_s.w %[temp0], %[temp7], 27 \n\t" + "shll_s.w %[temp4], %[temp8], 27 \n\t" + "sra %[temp0], %[temp0], 27 \n\t" + "sra %[temp4], %[temp4], 27 \n\t" + "addu %[temp7], %[temp1], %[temp0] \n\t" + "subu %[temp2], %[temp2], %[temp4] \n\t" + "lbux %[temp3], %[temp7](%[VP8kclip1]) \n\t" + "lbux %[temp4], %[temp2](%[VP8kclip1]) \n\t" + "sb %[temp3], -1(%[p]) \n\t" + "sb %[temp4], 0(%[p]) \n\t" + "1: \n\t" + "bgtz %[i], 0b \n\t" + " addu %[p], %[p], %[stride] \n\t" + ".set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [p]"+&r"(p), [i]"=&r"(i) + : [stride]"r"(stride), [VP8kclip1]"r"(VP8kclip1), [thresh2]"r"(thresh2) + : "memory" + ); +} + +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); + } +} + +// DST[A * BPS] = TEMP0 +// DST[B + C * BPS] = TEMP1 +#define STORE_8_BYTES(TEMP0, TEMP1, A, B, C, DST) \ + "usw %[" #TEMP0 "], " #A "*" XSTR(BPS) "(%[" #DST "]) \n\t" \ + "usw %[" #TEMP1 "], " #B "+" #C "*" XSTR(BPS) "(%[" #DST "]) \n\t" + +static void VE4(uint8_t* dst) { // vertical + const uint8_t* top = dst - BPS; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6; + __asm__ volatile ( + "ulw %[temp0], -1(%[top]) \n\t" + "ulh %[temp1], 3(%[top]) \n\t" + "preceu.ph.qbr %[temp2], %[temp0] \n\t" + "preceu.ph.qbl %[temp3], %[temp0] \n\t" + "preceu.ph.qbr %[temp4], %[temp1] \n\t" + "packrl.ph %[temp5], %[temp3], %[temp2] \n\t" + "packrl.ph %[temp6], %[temp4], %[temp3] \n\t" + "shll.ph %[temp5], %[temp5], 1 \n\t" + "shll.ph %[temp6], %[temp6], 1 \n\t" + "addq.ph %[temp2], %[temp5], %[temp2] \n\t" + "addq.ph %[temp6], %[temp6], %[temp4] \n\t" + "addq.ph %[temp2], %[temp2], %[temp3] \n\t" + "addq.ph %[temp6], %[temp6], %[temp3] \n\t" + "shra_r.ph %[temp2], %[temp2], 2 \n\t" + "shra_r.ph %[temp6], %[temp6], 2 \n\t" + "precr.qb.ph %[temp4], %[temp6], %[temp2] \n\t" + STORE_8_BYTES(temp4, temp4, 0, 0, 1, dst) + STORE_8_BYTES(temp4, temp4, 2, 0, 3, dst) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void DC4(uint8_t* dst) { // DC + int temp0, temp1, temp2, temp3, temp4; + __asm__ volatile ( + "ulw %[temp0], -1*" XSTR(BPS) "(%[dst]) \n\t" + LOAD_4_BYTES(temp1, temp2, temp3, temp4, -1, 0, -1, 1, -1, 2, -1, 3, dst) + "ins %[temp1], %[temp2], 8, 8 \n\t" + "ins %[temp1], %[temp3], 16, 8 \n\t" + "ins %[temp1], %[temp4], 24, 8 \n\t" + "raddu.w.qb %[temp0], %[temp0] \n\t" + "raddu.w.qb %[temp1], %[temp1] \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "shra_r.w %[temp0], %[temp0], 3 \n\t" + "replv.qb %[temp0], %[temp0] \n\t" + STORE_8_BYTES(temp0, temp0, 0, 0, 1, dst) + STORE_8_BYTES(temp0, temp0, 2, 0, 3, dst) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4) + : [dst]"r"(dst) + : "memory" + ); +} + +static void RD4(uint8_t* dst) { // Down-right + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8; + __asm__ volatile ( + LOAD_4_BYTES(temp0, temp1, temp2, temp3, -1, 0, -1, 1, -1, 2, -1, 3, dst) + "ulw %[temp7], -1-" XSTR(BPS) "(%[dst]) \n\t" + "ins %[temp1], %[temp0], 16, 16 \n\t" + "preceu.ph.qbr %[temp5], %[temp7] \n\t" + "ins %[temp2], %[temp1], 16, 16 \n\t" + "preceu.ph.qbl %[temp4], %[temp7] \n\t" + "ins %[temp3], %[temp2], 16, 16 \n\t" + "shll.ph %[temp2], %[temp2], 1 \n\t" + "addq.ph %[temp3], %[temp3], %[temp1] \n\t" + "packrl.ph %[temp6], %[temp5], %[temp1] \n\t" + "addq.ph %[temp3], %[temp3], %[temp2] \n\t" + "addq.ph %[temp1], %[temp1], %[temp5] \n\t" + "shll.ph %[temp6], %[temp6], 1 \n\t" + "addq.ph %[temp1], %[temp1], %[temp6] \n\t" + "packrl.ph %[temp0], %[temp4], %[temp5] \n\t" + "addq.ph %[temp8], %[temp5], %[temp4] \n\t" + "shra_r.ph %[temp3], %[temp3], 2 \n\t" + "shll.ph %[temp0], %[temp0], 1 \n\t" + "shra_r.ph %[temp1], %[temp1], 2 \n\t" + "addq.ph %[temp8], %[temp0], %[temp8] \n\t" + "lbu %[temp5], 3-" XSTR(BPS) "(%[dst]) \n\t" + "precrq.ph.w %[temp7], %[temp7], %[temp7] \n\t" + "shra_r.ph %[temp8], %[temp8], 2 \n\t" + "ins %[temp7], %[temp5], 0, 8 \n\t" + "precr.qb.ph %[temp2], %[temp1], %[temp3] \n\t" + "raddu.w.qb %[temp4], %[temp7] \n\t" + "precr.qb.ph %[temp6], %[temp8], %[temp1] \n\t" + "shra_r.w %[temp4], %[temp4], 2 \n\t" + STORE_8_BYTES(temp2, temp6, 3, 0, 1, dst) + "prepend %[temp2], %[temp8], 8 \n\t" + "prepend %[temp6], %[temp4], 8 \n\t" + STORE_8_BYTES(temp2, temp6, 2, 0, 0, dst) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8) + : [dst]"r"(dst) + : "memory" + ); +} + +// TEMP0 = SRC[A * BPS] +// TEMP1 = SRC[B + C * BPS] +#define LOAD_8_BYTES(TEMP0, TEMP1, A, B, C, SRC) \ + "ulw %[" #TEMP0 "], " #A "*" XSTR(BPS) "(%[" #SRC "]) \n\t" \ + "ulw %[" #TEMP1 "], " #B "+" #C "*" XSTR(BPS) "(%[" #SRC "]) \n\t" + +static void LD4(uint8_t* dst) { // Down-Left + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8, temp9; + __asm__ volatile ( + LOAD_8_BYTES(temp0, temp1, -1, 4, -1, dst) + "preceu.ph.qbl %[temp2], %[temp0] \n\t" + "preceu.ph.qbr %[temp3], %[temp0] \n\t" + "preceu.ph.qbr %[temp4], %[temp1] \n\t" + "preceu.ph.qbl %[temp5], %[temp1] \n\t" + "packrl.ph %[temp6], %[temp2], %[temp3] \n\t" + "packrl.ph %[temp7], %[temp4], %[temp2] \n\t" + "packrl.ph %[temp8], %[temp5], %[temp4] \n\t" + "shll.ph %[temp6], %[temp6], 1 \n\t" + "addq.ph %[temp9], %[temp2], %[temp6] \n\t" + "shll.ph %[temp7], %[temp7], 1 \n\t" + "addq.ph %[temp9], %[temp9], %[temp3] \n\t" + "shll.ph %[temp8], %[temp8], 1 \n\t" + "shra_r.ph %[temp9], %[temp9], 2 \n\t" + "addq.ph %[temp3], %[temp4], %[temp7] \n\t" + "addq.ph %[temp0], %[temp5], %[temp8] \n\t" + "addq.ph %[temp3], %[temp3], %[temp2] \n\t" + "addq.ph %[temp0], %[temp0], %[temp4] \n\t" + "shra_r.ph %[temp3], %[temp3], 2 \n\t" + "shra_r.ph %[temp0], %[temp0], 2 \n\t" + "srl %[temp1], %[temp1], 24 \n\t" + "sll %[temp1], %[temp1], 1 \n\t" + "raddu.w.qb %[temp5], %[temp5] \n\t" + "precr.qb.ph %[temp9], %[temp3], %[temp9] \n\t" + "precr.qb.ph %[temp3], %[temp0], %[temp3] \n\t" + "addu %[temp1], %[temp1], %[temp5] \n\t" + "shra_r.w %[temp1], %[temp1], 2 \n\t" + STORE_8_BYTES(temp9, temp3, 0, 0, 2, dst) + "prepend %[temp9], %[temp0], 8 \n\t" + "prepend %[temp3], %[temp1], 8 \n\t" + STORE_8_BYTES(temp9, temp3, 1, 0, 3, dst) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9) + : [dst]"r"(dst) + : "memory" + ); +} + +//------------------------------------------------------------------------------ +// Chroma + +static void DC8uv(uint8_t* dst) { // DC + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8, temp9; + __asm__ volatile ( + LOAD_8_BYTES(temp0, temp1, -1, 4, -1, dst) + LOAD_4_BYTES(temp2, temp3, temp4, temp5, -1, 0, -1, 1, -1, 2, -1, 3, dst) + LOAD_4_BYTES(temp6, temp7, temp8, temp9, -1, 4, -1, 5, -1, 6, -1, 7, dst) + "raddu.w.qb %[temp0], %[temp0] \n\t" + "raddu.w.qb %[temp1], %[temp1] \n\t" + "addu %[temp2], %[temp2], %[temp3] \n\t" + "addu %[temp4], %[temp4], %[temp5] \n\t" + "addu %[temp6], %[temp6], %[temp7] \n\t" + "addu %[temp8], %[temp8], %[temp9] \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "addu %[temp2], %[temp2], %[temp4] \n\t" + "addu %[temp6], %[temp6], %[temp8] \n\t" + "addu %[temp0], %[temp0], %[temp2] \n\t" + "addu %[temp0], %[temp0], %[temp6] \n\t" + "shra_r.w %[temp0], %[temp0], 4 \n\t" + "replv.qb %[temp0], %[temp0] \n\t" + STORE_8_BYTES(temp0, temp0, 0, 4, 0, dst) + STORE_8_BYTES(temp0, temp0, 1, 4, 1, dst) + STORE_8_BYTES(temp0, temp0, 2, 4, 2, dst) + STORE_8_BYTES(temp0, temp0, 3, 4, 3, dst) + STORE_8_BYTES(temp0, temp0, 4, 4, 4, dst) + STORE_8_BYTES(temp0, temp0, 5, 4, 5, dst) + STORE_8_BYTES(temp0, temp0, 6, 4, 6, dst) + STORE_8_BYTES(temp0, temp0, 7, 4, 7, dst) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9) + : [dst]"r"(dst) + : "memory" + ); +} + +static void DC8uvNoLeft(uint8_t* dst) { // DC with no left samples + int temp0, temp1; + __asm__ volatile ( + LOAD_8_BYTES(temp0, temp1, -1, 4, -1, dst) + "raddu.w.qb %[temp0], %[temp0] \n\t" + "raddu.w.qb %[temp1], %[temp1] \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "shra_r.w %[temp0], %[temp0], 3 \n\t" + "replv.qb %[temp0], %[temp0] \n\t" + STORE_8_BYTES(temp0, temp0, 0, 4, 0, dst) + STORE_8_BYTES(temp0, temp0, 1, 4, 1, dst) + STORE_8_BYTES(temp0, temp0, 2, 4, 2, dst) + STORE_8_BYTES(temp0, temp0, 3, 4, 3, dst) + STORE_8_BYTES(temp0, temp0, 4, 4, 4, dst) + STORE_8_BYTES(temp0, temp0, 5, 4, 5, dst) + STORE_8_BYTES(temp0, temp0, 6, 4, 6, dst) + STORE_8_BYTES(temp0, temp0, 7, 4, 7, dst) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1) + : [dst]"r"(dst) + : "memory" + ); +} + +static void DC8uvNoTop(uint8_t* dst) { // DC with no top samples + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8; + __asm__ volatile ( + LOAD_4_BYTES(temp2, temp3, temp4, temp5, -1, 0, -1, 1, -1, 2, -1, 3, dst) + LOAD_4_BYTES(temp6, temp7, temp8, temp1, -1, 4, -1, 5, -1, 6, -1, 7, dst) + "addu %[temp2], %[temp2], %[temp3] \n\t" + "addu %[temp4], %[temp4], %[temp5] \n\t" + "addu %[temp6], %[temp6], %[temp7] \n\t" + "addu %[temp8], %[temp8], %[temp1] \n\t" + "addu %[temp2], %[temp2], %[temp4] \n\t" + "addu %[temp6], %[temp6], %[temp8] \n\t" + "addu %[temp0], %[temp6], %[temp2] \n\t" + "shra_r.w %[temp0], %[temp0], 3 \n\t" + "replv.qb %[temp0], %[temp0] \n\t" + STORE_8_BYTES(temp0, temp0, 0, 4, 0, dst) + STORE_8_BYTES(temp0, temp0, 1, 4, 1, dst) + STORE_8_BYTES(temp0, temp0, 2, 4, 2, dst) + STORE_8_BYTES(temp0, temp0, 3, 4, 3, dst) + STORE_8_BYTES(temp0, temp0, 4, 4, 4, dst) + STORE_8_BYTES(temp0, temp0, 5, 4, 5, dst) + STORE_8_BYTES(temp0, temp0, 6, 4, 6, dst) + STORE_8_BYTES(temp0, temp0, 7, 4, 7, dst) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8) + : [dst]"r"(dst) + : "memory" + ); +} + +#undef LOAD_8_BYTES +#undef STORE_8_BYTES +#undef LOAD_4_BYTES + +#define CLIPPING(SIZE) \ + "preceu.ph.qbl %[temp2], %[temp0] \n\t" \ + "preceu.ph.qbr %[temp0], %[temp0] \n\t" \ +".if " #SIZE " == 8 \n\t" \ + "preceu.ph.qbl %[temp3], %[temp1] \n\t" \ + "preceu.ph.qbr %[temp1], %[temp1] \n\t" \ +".endif \n\t" \ + "addu.ph %[temp2], %[temp2], %[dst_1] \n\t" \ + "addu.ph %[temp0], %[temp0], %[dst_1] \n\t" \ +".if " #SIZE " == 8 \n\t" \ + "addu.ph %[temp3], %[temp3], %[dst_1] \n\t" \ + "addu.ph %[temp1], %[temp1], %[dst_1] \n\t" \ +".endif \n\t" \ + "shll_s.ph %[temp2], %[temp2], 7 \n\t" \ + "shll_s.ph %[temp0], %[temp0], 7 \n\t" \ +".if " #SIZE " == 8 \n\t" \ + "shll_s.ph %[temp3], %[temp3], 7 \n\t" \ + "shll_s.ph %[temp1], %[temp1], 7 \n\t" \ +".endif \n\t" \ + "precrqu_s.qb.ph %[temp0], %[temp2], %[temp0] \n\t" \ +".if " #SIZE " == 8 \n\t" \ + "precrqu_s.qb.ph %[temp1], %[temp3], %[temp1] \n\t" \ +".endif \n\t" + + +#define CLIP_8B_TO_DST(DST, TOP, SIZE) do { \ + int dst_1 = ((int)(DST)[-1] << 16) + (DST)[-1]; \ + int temp0, temp1, temp2, temp3; \ + __asm__ volatile ( \ + ".if " #SIZE " < 8 \n\t" \ + "ulw %[temp0], 0(%[top]) \n\t" \ + "subu.ph %[dst_1], %[dst_1], %[top_1] \n\t" \ + CLIPPING(4) \ + "usw %[temp0], 0(%[dst]) \n\t" \ + ".else \n\t" \ + "ulw %[temp0], 0(%[top]) \n\t" \ + "ulw %[temp1], 4(%[top]) \n\t" \ + "subu.ph %[dst_1], %[dst_1], %[top_1] \n\t" \ + CLIPPING(8) \ + "usw %[temp0], 0(%[dst]) \n\t" \ + "usw %[temp1], 4(%[dst]) \n\t" \ + ".if " #SIZE " == 16 \n\t" \ + "ulw %[temp0], 8(%[top]) \n\t" \ + "ulw %[temp1], 12(%[top]) \n\t" \ + CLIPPING(8) \ + "usw %[temp0], 8(%[dst]) \n\t" \ + "usw %[temp1], 12(%[dst]) \n\t" \ + ".endif \n\t" \ + ".endif \n\t" \ + : [dst_1]"+&r"(dst_1), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), \ + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3) \ + : [top_1]"r"(top_1), [top]"r"((TOP)), [dst]"r"((DST)) \ + : "memory" \ + ); \ +} while (0) + +#define CLIP_TO_DST(DST, SIZE) do { \ + int y; \ + const uint8_t* top = (DST) - BPS; \ + const int top_1 = ((int)top[-1] << 16) + top[-1]; \ + for (y = 0; y < (SIZE); ++y) { \ + CLIP_8B_TO_DST((DST), top, (SIZE)); \ + (DST) += BPS; \ + } \ +} while (0) + +#define TRUE_MOTION(DST, SIZE) \ +static void TrueMotion##SIZE(uint8_t* (DST)) { \ + CLIP_TO_DST((DST), (SIZE)); \ +} + +TRUE_MOTION(dst, 4) +TRUE_MOTION(dst, 8) +TRUE_MOTION(dst, 16) + +#undef TRUE_MOTION +#undef CLIP_TO_DST +#undef CLIP_8B_TO_DST +#undef CLIPPING + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8DspInitMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitMIPSdspR2(void) { + VP8TransformDC = TransformDC; + VP8TransformAC3 = TransformAC3; + VP8Transform = TransformTwo; + + 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[0] = DC4; + VP8PredLuma4[1] = TrueMotion4; + VP8PredLuma4[2] = VE4; + VP8PredLuma4[4] = RD4; + VP8PredLuma4[6] = LD4; + + VP8PredChroma8[0] = DC8uv; + VP8PredChroma8[1] = TrueMotion8; + VP8PredChroma8[4] = DC8uvNoTop; + VP8PredChroma8[5] = DC8uvNoLeft; + + VP8PredLuma16[1] = TrueMotion16; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(VP8DspInitMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/dec_msa.c b/thirdparty/libwebp/dsp/dec_msa.c new file mode 100644 index 0000000000..f76055cab0 --- /dev/null +++ b/thirdparty/libwebp/dsp/dec_msa.c @@ -0,0 +1,172 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MSA version of dsp functions +// +// Author(s): Prashant Patil (prashant.patil@imgtec.com) + + +#include "./dsp.h" + +#if defined(WEBP_USE_MSA) + +#include "./msa_macro.h" + +//------------------------------------------------------------------------------ +// Transforms + +#define IDCT_1D_W(in0, in1, in2, in3, out0, out1, out2, out3) { \ + v4i32 a1_m, b1_m, c1_m, d1_m; \ + v4i32 c_tmp1_m, c_tmp2_m, d_tmp1_m, d_tmp2_m; \ + const v4i32 cospi8sqrt2minus1 = __msa_fill_w(20091); \ + const v4i32 sinpi8sqrt2 = __msa_fill_w(35468); \ + \ + a1_m = in0 + in2; \ + b1_m = in0 - in2; \ + c_tmp1_m = (in1 * sinpi8sqrt2) >> 16; \ + c_tmp2_m = in3 + ((in3 * cospi8sqrt2minus1) >> 16); \ + c1_m = c_tmp1_m - c_tmp2_m; \ + d_tmp1_m = in1 + ((in1 * cospi8sqrt2minus1) >> 16); \ + d_tmp2_m = (in3 * sinpi8sqrt2) >> 16; \ + d1_m = d_tmp1_m + d_tmp2_m; \ + BUTTERFLY_4(a1_m, b1_m, c1_m, d1_m, out0, out1, out2, out3); \ +} +#define MULT1(a) ((((a) * 20091) >> 16) + (a)) +#define MULT2(a) (((a) * 35468) >> 16) + +static void TransformOne(const int16_t* in, uint8_t* dst) { + v8i16 input0, input1; + v4i32 in0, in1, in2, in3, hz0, hz1, hz2, hz3, vt0, vt1, vt2, vt3; + v4i32 res0, res1, res2, res3; + const v16i8 zero = { 0 }; + v16i8 dest0, dest1, dest2, dest3; + + LD_SH2(in, 8, input0, input1); + UNPCK_SH_SW(input0, in0, in1); + UNPCK_SH_SW(input1, in2, in3); + IDCT_1D_W(in0, in1, in2, in3, hz0, hz1, hz2, hz3); + TRANSPOSE4x4_SW_SW(hz0, hz1, hz2, hz3, hz0, hz1, hz2, hz3); + IDCT_1D_W(hz0, hz1, hz2, hz3, vt0, vt1, vt2, vt3); + SRARI_W4_SW(vt0, vt1, vt2, vt3, 3); + TRANSPOSE4x4_SW_SW(vt0, vt1, vt2, vt3, vt0, vt1, vt2, vt3); + LD_SB4(dst, BPS, dest0, dest1, dest2, dest3); + ILVR_B4_SW(zero, dest0, zero, dest1, zero, dest2, zero, dest3, + res0, res1, res2, res3); + ILVR_H4_SW(zero, res0, zero, res1, zero, res2, zero, res3, + res0, res1, res2, res3); + ADD4(res0, vt0, res1, vt1, res2, vt2, res3, vt3, res0, res1, res2, res3); + CLIP_SW4_0_255(res0, res1, res2, res3); + PCKEV_B2_SW(res0, res1, res2, res3, vt0, vt1); + res0 = (v4i32)__msa_pckev_b((v16i8)vt0, (v16i8)vt1); + ST4x4_UB(res0, res0, 3, 2, 1, 0, dst, BPS); +} + +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 TransformWHT(const int16_t* in, int16_t* out) { + v8i16 input0, input1; + const v8i16 mask0 = { 0, 1, 2, 3, 8, 9, 10, 11 }; + const v8i16 mask1 = { 4, 5, 6, 7, 12, 13, 14, 15 }; + const v8i16 mask2 = { 0, 4, 8, 12, 1, 5, 9, 13 }; + const v8i16 mask3 = { 3, 7, 11, 15, 2, 6, 10, 14 }; + v8i16 tmp0, tmp1, tmp2, tmp3; + v8i16 out0, out1; + + LD_SH2(in, 8, input0, input1); + input1 = SLDI_SH(input1, input1, 8); + tmp0 = input0 + input1; + tmp1 = input0 - input1; + VSHF_H2_SH(tmp0, tmp1, tmp0, tmp1, mask0, mask1, tmp2, tmp3); + out0 = tmp2 + tmp3; + out1 = tmp2 - tmp3; + VSHF_H2_SH(out0, out1, out0, out1, mask2, mask3, input0, input1); + tmp0 = input0 + input1; + tmp1 = input0 - input1; + VSHF_H2_SH(tmp0, tmp1, tmp0, tmp1, mask0, mask1, tmp2, tmp3); + tmp0 = tmp2 + tmp3; + tmp1 = tmp2 - tmp3; + ADDVI_H2_SH(tmp0, 3, tmp1, 3, out0, out1); + SRAI_H2_SH(out0, out1, 3); + out[0] = __msa_copy_s_h(out0, 0); + out[16] = __msa_copy_s_h(out0, 4); + out[32] = __msa_copy_s_h(out1, 0); + out[48] = __msa_copy_s_h(out1, 4); + out[64] = __msa_copy_s_h(out0, 1); + out[80] = __msa_copy_s_h(out0, 5); + out[96] = __msa_copy_s_h(out1, 1); + out[112] = __msa_copy_s_h(out1, 5); + out[128] = __msa_copy_s_h(out0, 2); + out[144] = __msa_copy_s_h(out0, 6); + out[160] = __msa_copy_s_h(out1, 2); + out[176] = __msa_copy_s_h(out1, 6); + out[192] = __msa_copy_s_h(out0, 3); + out[208] = __msa_copy_s_h(out0, 7); + out[224] = __msa_copy_s_h(out1, 3); + out[240] = __msa_copy_s_h(out1, 7); +} + +static void TransformDC(const int16_t* in, uint8_t* dst) { + const int DC = (in[0] + 4) >> 3; + const v8i16 tmp0 = __msa_fill_h(DC); + ADDBLK_ST4x4_UB(tmp0, tmp0, tmp0, tmp0, dst, BPS); +} + +static void TransformAC3(const int16_t* in, uint8_t* dst) { + const int a = in[0] + 4; + const int c4 = MULT2(in[4]); + const int d4 = MULT1(in[4]); + const int in2 = MULT2(in[1]); + const int in3 = MULT1(in[1]); + v4i32 tmp0 = { 0 }; + v4i32 out0 = __msa_fill_w(a + d4); + v4i32 out1 = __msa_fill_w(a + c4); + v4i32 out2 = __msa_fill_w(a - c4); + v4i32 out3 = __msa_fill_w(a - d4); + v4i32 res0, res1, res2, res3; + const v4i32 zero = { 0 }; + v16u8 dest0, dest1, dest2, dest3; + + INSERT_W4_SW(in3, in2, -in2, -in3, tmp0); + ADD4(out0, tmp0, out1, tmp0, out2, tmp0, out3, tmp0, + out0, out1, out2, out3); + SRAI_W4_SW(out0, out1, out2, out3, 3); + LD_UB4(dst, BPS, dest0, dest1, dest2, dest3); + ILVR_B4_SW(zero, dest0, zero, dest1, zero, dest2, zero, dest3, + res0, res1, res2, res3); + ILVR_H4_SW(zero, res0, zero, res1, zero, res2, zero, res3, + res0, res1, res2, res3); + ADD4(res0, out0, res1, out1, res2, out2, res3, out3, res0, res1, res2, res3); + CLIP_SW4_0_255(res0, res1, res2, res3); + PCKEV_B2_SW(res0, res1, res2, res3, out0, out1); + res0 = (v4i32)__msa_pckev_b((v16i8)out0, (v16i8)out1); + ST4x4_UB(res0, res0, 3, 2, 1, 0, dst, BPS); +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8DspInitMSA(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitMSA(void) { + VP8TransformWHT = TransformWHT; + VP8Transform = TransformTwo; + VP8TransformDC = TransformDC; + VP8TransformAC3 = TransformAC3; +} + +#else // !WEBP_USE_MSA + +WEBP_DSP_INIT_STUB(VP8DspInitMSA) + +#endif // WEBP_USE_MSA diff --git a/thirdparty/libwebp/dsp/dec_neon.c b/thirdparty/libwebp/dsp/dec_neon.c new file mode 100644 index 0000000000..a63f43fe17 --- /dev/null +++ b/thirdparty/libwebp/dsp/dec_neon.c @@ -0,0 +1,1639 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// Authors: Somnath Banerjee (somnath@google.com) +// Johann Koenig (johannkoenig@google.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_NEON) + +#include "./neon.h" +#include "../dec/vp8i.h" + +//------------------------------------------------------------------------------ +// 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); +} + +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) \ + "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) + +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 {q12}, [%[p]] \n" // q1 + + DO_FILTER2(q1, q2, q3, q12, %[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 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(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, q12, q13, %[thresh]) + + "sub %[p], %[p], #1 \n" // p - 1 + + "vswp d5, d24 \n" + STORE8x2(d4, d5, [%[p]], %[stride]) + STORE8x2(d24, d25, [%[p]], %[stride]) + + : [p] "+r"(p) + : [stride] "r"(stride), [thresh] "r"(thresh) + : "memory", "r4", "r5", "r6", QRegs + ); +} + +#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; + SimpleVFilter16(p, stride, thresh); + } +} + +static void SimpleHFilter16i(uint8_t* p, int stride, int thresh) { + uint32_t k; + for (k = 3; k != 0; --k) { + p += 4; + SimpleHFilter16(p, stride, thresh); + } +} + +//------------------------------------------------------------------------------ +// 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" + "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 */ + ); +} + +#endif // WEBP_USE_INTRINSICS + +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 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; + + { + // 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); + + STORE_WHT(out, 0, tmp); + STORE_WHT(out, 1, tmp); + STORE_WHT(out, 2, tmp); + STORE_WHT(out, 3, tmp); + } +} + +#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 diff --git a/thirdparty/libwebp/dsp/dec_sse2.c b/thirdparty/libwebp/dsp/dec_sse2.c new file mode 100644 index 0000000000..f0a8ddcaf3 --- /dev/null +++ b/thirdparty/libwebp/dsp/dec_sse2.c @@ -0,0 +1,1231 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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). +// +// Author: somnath@google.com (Somnath Banerjee) +// cduvivier@google.com (Christian Duvivier) + +#include "./dsp.h" + +#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 "./common_sse2.h" +#include "../dec/vp8i.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// Transforms (Paragraph 14.4) + +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 + // 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((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((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); + 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. + VP8Transpose_2_4x4_16b(&tmp0, &tmp1, &tmp2, &tmp3, &T0, &T1, &T2, &T3); + } + + // 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. + VP8Transpose_2_4x4_16b(&shifted0, &shifted1, &shifted2, &shifted3, &T0, &T1, + &T2, &T3); + } + + // Add inverse transform to 'dst' and store. + { + 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)); + } else { + // Load four bytes/pixels per line. + dst0 = _mm_cvtsi32_si128(WebPMemToUint32(dst + 0 * BPS)); + dst1 = _mm_cvtsi32_si128(WebPMemToUint32(dst + 1 * BPS)); + dst2 = _mm_cvtsi32_si128(WebPMemToUint32(dst + 2 * BPS)); + dst3 = _mm_cvtsi32_si128(WebPMemToUint32(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. + WebPUint32ToMem(dst + 0 * BPS, _mm_cvtsi128_si32(dst0)); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32(dst1)); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(dst2)); + WebPUint32ToMem(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(WebPMemToUint32(dst + 0 * BPS)); + __m128i dst1 = _mm_cvtsi32_si128(WebPMemToUint32(dst + 1 * BPS)); + __m128i dst2 = _mm_cvtsi32_si128(WebPMemToUint32(dst + 2 * BPS)); + __m128i dst3 = _mm_cvtsi32_si128(WebPMemToUint32(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. + WebPUint32ToMem(dst + 0 * BPS, _mm_cvtsi128_si32(dst0)); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32(dst1)); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(dst2)); + WebPUint32ToMem(dst + 3 * BPS, _mm_cvtsi128_si32(dst3)); +} +#undef MUL +#endif // USE_TRANSFORM_AC3 + +//------------------------------------------------------------------------------ +// 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 "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) { \ + 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); \ +} + +// 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 +} + +// 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; +} + +// 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 +} + +// 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); +} + +// 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(__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); + + FLIP_SIGN_BIT2(*p0, *q0); + GetBaseDelta(&p1s, p0, q0, &q1s, &a); + a = _mm_and_si128(a, mask); // mask filter values we don't care about + 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* 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; + + // compute hev mask + GetNotHEV(p1, p0, q0, q1, hev_thresh, ¬_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 + + 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); + + // 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 + FLIP_SIGN_BIT2(*p1, *q1); +} + +// Applies filter on 6 pixels (p2, p1, p0, q0, q1 and q2) +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 + GetNotHEV(p1, p0, q0, q1, hev_thresh, ¬_hev); + + FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); + FLIP_SIGN_BIT2(*p2, *q2); + 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); + DoSimpleFilter(p0, q0, &f); + } + + { // do strong filter on pixels with not hev + 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, 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, k63); // Filter * 9 + 63 + const __m128i a2_hi = _mm_add_epi16(f9_hi, k63); // Filter * 9 + 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(a1_lo, f9_lo); // Filter * 27 + 63 + const __m128i a0_hi = _mm_add_epi16(a1_hi, f9_hi); // Filter * 27 + 63 + + Update2Pixels(p2, q2, &a2_lo, &a2_hi); + Update2Pixels(p1, q1, &a1_lo, &a1_hi); + Update2Pixels(p0, q0, &a0_lo, &a0_hi); + } +} + +// reads 8 rows across a vertical edge. +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( + WebPMemToUint32(&b[6 * stride]), WebPMemToUint32(&b[2 * stride]), + WebPMemToUint32(&b[4 * stride]), WebPMemToUint32(&b[0 * stride])); + const __m128i A1 = _mm_set_epi32( + WebPMemToUint32(&b[7 * stride]), WebPMemToUint32(&b[3 * stride]), + WebPMemToUint32(&b[5 * stride]), WebPMemToUint32(&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(C0, C1); + *q = _mm_unpackhi_epi32(C0, C1); +} + +static WEBP_INLINE void Load16x4(const uint8_t* const r0, + const uint8_t* const r8, + int stride, + __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 + // ... | ... + // 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); + + { + // 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* const x, uint8_t* dst, int stride) { + int i; + for (i = 0; i < 4; ++i, dst += stride) { + WebPUint32ToMem(dst, _mm_cvtsi128_si32(*x)); + *x = _mm_srli_si128(*x, 4); + } +} + +// Transpose back and store +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_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_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_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_s; + p1_s = _mm_unpacklo_epi16(t1, q1_s); + q1_s = _mm_unpackhi_epi16(t1, q1_s); + + Store4x4(&p0_s, r0, stride); + r0 += 4 * stride; + Store4x4(&q0_s, r0, stride); + + Store4x4(&p1_s, r8, stride); + r8 += 4 * stride; + Store4x4(&q1_s, r8, stride); +} + +//------------------------------------------------------------------------------ +// Simple In-loop filtering (Paragraph 15.2) + +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]); + __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[0], q0); +} + +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); + DoFilter2(&p1, &p0, &q0, &q1, thresh); + Store16x4(&p1, &p0, &q0, &q1, p, p + 8 * stride, stride); +} + +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) + +#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)); \ +} while (0) + +#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)); \ +} while (0) + +#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) 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); \ + 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); \ +} + +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 VFilter16(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); + + 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); +} + +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; + + 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); + + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); + DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); + + 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 VFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + int k; + __m128i p3, p2, p1, p0; // loop invariants + + 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; + + 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); + + // 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*)&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 HFilter16i(uint8_t* p, int stride, + int thresh, int ithresh, int hev_thresh) { + int k; + __m128i p3, p2, p1, p0; // loop invariants + + Load16x4(p, p + 8 * stride, stride, &p3, &p2, &p1, &p0); // prologue + + for (k = 3; k > 0; --k) { + __m128i mask, tmp1, tmp2; + uint8_t* const b = p + 2; // beginning of p1 + + p += 4; // beginning of q0 (and next span) + + 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); + + ComplexMask(&p1, &p0, &p3, &p2, thresh, ithresh, &mask); + DoFilter4(&p1, &p0, &p3, &p2, &mask, hev_thresh); + + 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 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; + + // 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); + + ComplexMask(&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 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; + + 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); + + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); + DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); + + Store16x4(&p3, &p2, &p1, &p0, tu, tv, stride); + Store16x4(&q0, &q1, &q2, &q3, u, v, stride); +} + +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; + + // 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); + + ComplexMask(&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 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 + 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); + + ComplexMask(&p1, &p0, &q0, &q1, thresh, ithresh, &mask); + DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); + + u -= 2; // beginning of p1 + v -= 2; + Store16x4(&p1, &p0, &q0, &q1, u, v, stride); +} + +//------------------------------------------------------------------------------ +// 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) { + WebPUint32ToMem(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); + WebPUint32ToMem(dst + 0 * BPS, _mm_cvtsi128_si32( abcdefg )); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1))); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2))); + WebPUint32ToMem(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); + WebPUint32ToMem(dst + 0 * BPS, _mm_cvtsi128_si32( abcd )); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32( efgh )); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(_mm_slli_si128(abcd, 1))); + WebPUint32ToMem(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 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)); + WebPUint32ToMem(dst + 0 * BPS, _mm_cvtsi128_si32( avg1 )); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32( avg4 )); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(avg1, 1))); + WebPUint32ToMem(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_); + WebPUint32ToMem(dst + 3 * BPS, _mm_cvtsi128_si32( abcdefg )); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1))); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2))); + WebPUint32ToMem(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(WebPMemToUint32(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); + WebPUint32ToMem(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); +} + +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); + } +} + +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); + } +} + +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 + + 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/thirdparty/libwebp/dsp/dec_sse41.c b/thirdparty/libwebp/dsp/dec_sse41.c new file mode 100644 index 0000000000..8d6aed13e6 --- /dev/null +++ b/thirdparty/libwebp/dsp/dec_sse41.c @@ -0,0 +1,46 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// SSE4 version of some decoding functions. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE41) + +#include <smmintrin.h> +#include "../dec/vp8i.h" +#include "../utils/utils.h" + +static void HE16(uint8_t* dst) { // horizontal + int j; + const __m128i kShuffle3 = _mm_set1_epi8(3); + for (j = 16; j > 0; --j) { + const __m128i in = _mm_cvtsi32_si128(WebPMemToUint32(dst - 4)); + const __m128i values = _mm_shuffle_epi8(in, kShuffle3); + _mm_storeu_si128((__m128i*)dst, values); + dst += BPS; + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8DspInitSSE41(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitSSE41(void) { + VP8PredLuma16[3] = HE16; +} + +#else // !WEBP_USE_SSE41 + +WEBP_DSP_INIT_STUB(VP8DspInitSSE41) + +#endif // WEBP_USE_SSE41 diff --git a/thirdparty/libwebp/dsp/dsp.h b/thirdparty/libwebp/dsp/dsp.h new file mode 100644 index 0000000000..1faac27b2b --- /dev/null +++ b/thirdparty/libwebp/dsp/dsp.h @@ -0,0 +1,569 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_DSP_DSP_H_ +#define WEBP_DSP_DSP_H_ + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define BPS 32 // this is the common stride for enc/dec + +//------------------------------------------------------------------------------ +// CPU detection + +#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(_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(__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 + +// 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(WEBP_HAVE_NEON)) && \ + !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 + +#if defined(__mips_msa) && defined(__mips_isa_rev) && (__mips_isa_rev >= 5) +#define WEBP_USE_MSA +#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 + +#define WEBP_UBSAN_IGNORE_UNDEF +#define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW +#if !defined(WEBP_FORCE_ALIGNED) && defined(__clang__) && \ + defined(__has_attribute) +#if __has_attribute(no_sanitize) +// This macro prevents the undefined behavior sanitizer from reporting +// failures. This is only meant to silence unaligned loads on platforms that +// are known to support them. +#undef WEBP_UBSAN_IGNORE_UNDEF +#define WEBP_UBSAN_IGNORE_UNDEF \ + __attribute__((no_sanitize("undefined"))) + +// This macro prevents the undefined behavior sanitizer from reporting +// failures related to unsigned integer overflows. This is only meant to +// silence cases where this well defined behavior is expected. +#undef WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW +#define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW \ + __attribute__((no_sanitize("unsigned-integer-overflow"))) +#endif +#endif + +typedef enum { + kSSE2, + kSSE3, + kSSE4_1, + kAVX, + kAVX2, + kNEON, + kMIPS32, + kMIPSdspR2, + kMSA +} CPUFeature; +// returns true if the CPU supports the feature. +typedef int (*VP8CPUInfo)(CPUFeature feature); +WEBP_EXTERN(VP8CPUInfo) VP8GetCPUInfo; + +//------------------------------------------------------------------------------ +// Init stub generator + +// 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 +// 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 VP8Fdct VP8FTransform2; // performs two transforms at a time +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); +// The weights for VP8TDisto4x4 and VP8TDisto16x16 contain a row-major +// 4 by 4 symmetric matrix. +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], + 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; + +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; + +// 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); + +//------------------------------------------------------------------------------ +// SSIM utils + +// struct for accumulating statistical moments +typedef struct { + double w; // sum(w_i) : sum of weights + double xm, ym; // sum(w_i * x_i), sum(w_i * y_i) + double xxm, xym, yym; // sum(w_i * x_i * x_i), etc. +} VP8DistoStats; + +#define VP8_SSIM_KERNEL 3 // total size of the kernel: 2 * VP8_SSIM_KERNEL + 1 +typedef void (*VP8SSIMAccumulateClippedFunc)(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int xo, int yo, // center position + int W, int H, // plane dimension + VP8DistoStats* const stats); + +// This version is called with the guarantee that you can load 8 bytes and +// 8 rows at offset src1 and src2 +typedef void (*VP8SSIMAccumulateFunc)(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + VP8DistoStats* const stats); + +extern VP8SSIMAccumulateFunc VP8SSIMAccumulate; // unclipped / unchecked +extern VP8SSIMAccumulateClippedFunc VP8SSIMAccumulateClipped; // with clipping + +// must be called before using any of the above directly +void VP8SSIMDspInit(void); + +//------------------------------------------------------------------------------ +// 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 VP8TransformAC3; +extern VP8DecIdct VP8TransformUV; +extern VP8DecIdct VP8TransformDC; +extern VP8DecIdct VP8TransformDCUV; +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 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); +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; + +// Dithering. Combines dithering values (centered around 128) with dst[], +// according to: dst[] = clip(dst[] + (((dither[]-128) + 8) >> 4) +#define VP8_DITHER_DESCALE 4 +#define VP8_DITHER_DESCALE_ROUNDER (1 << (VP8_DITHER_DESCALE - 1)) +#define VP8_DITHER_AMP_BITS 7 +#define VP8_DITHER_AMP_CENTER (1 << VP8_DITHER_AMP_BITS) +extern void (*VP8DitherCombine8x8)(const uint8_t* dither, uint8_t* dst, + int dst_stride); + +// must be called before anything using the above +void VP8DspInit(void); + +//------------------------------------------------------------------------------ +// WebP I/O + +#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, + 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 */]; + +#endif // FANCY_UPSAMPLING + +// 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); + +// 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 +// 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 WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */]; + +// 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); + +//------------------------------------------------------------------------------ +// 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). +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); + +// 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 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); + +// 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); +// In-place un-filtering. +// Warning! 'prev_line' pointer can be equal to 'cur_line' or 'preds'. +typedef void (*WebPUnfilterFunc)(const uint8_t* prev_line, const uint8_t* preds, + uint8_t* cur_line, int width); + +// 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); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_DSP_DSP_H_ */ diff --git a/thirdparty/libwebp/dsp/enc.c b/thirdparty/libwebp/dsp/enc.c new file mode 100644 index 0000000000..f639f5570c --- /dev/null +++ b/thirdparty/libwebp/dsp/enc.c @@ -0,0 +1,863 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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" + +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. + +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 +}; + +// 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) { + int k; + int16_t out[16]; + + VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); + + // Convert coefficients to bin. + for (k = 0; k < 16; ++k) { + const int v = abs(out[k]) >> 3; + const int clipped_value = clip_max(v, MAX_COEFF_THRESH); + ++distribution[clipped_value]; + } + } + VP8SetHistogramData(distribution, 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 WEBP_TSAN_IGNORE_FUNCTION void InitTables(void) { + if (!tables_ok) { + int i; + for (i = -255; i <= 255 + 255; ++i) { + clip1[255 + i] = clip_8b(i); + } + tables_ok = 1; + } +} + + +//------------------------------------------------------------------------------ +// 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]; // 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); // 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]); // 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; // 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 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) { + // 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]); // 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]); // 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; // 16b + const int b1 = a3 + a2; + const int b2 = a3 - a2; + const int b3 = a0 - a1; + out[ 0 + i] = b0 >> 1; // 15b + out[ 4 + i] = b1 >> 1; + out[ 8 + i] = b2 >> 1; + out[12 + i] = b3 >> 1; + } +} + +#undef MUL +#undef STORE + +//------------------------------------------------------------------------------ +// Intra predictions + +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 != NULL) { + 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 != NULL) { + 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 != 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]; + 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 != NULL) { + 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 != NULL) { + for (j = 0; j < size; ++j) DC += top[j]; + 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 != NULL) { // 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 != 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); + 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 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) + +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]; + WebPUint32ToMem(dst + 0 * BPS, 0x01010101U * AVG3(X, I, J)); + WebPUint32ToMem(dst + 1 * BPS, 0x01010101U * AVG3(I, J, K)); + WebPUint32ToMem(dst + 2 * BPS, 0x01010101U * AVG3(J, K, L)); + WebPUint32ToMem(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. +// w[] contains a row-major 4 by 4 symmetric matrix. +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]; + 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 b0 = a0 + a1; + const int b1 = a3 + a2; + const int b2 = a3 - a2; + const int b3 = a0 - a1; + + sum += w[ 0] * abs(b0); + sum += w[ 4] * abs(b1); + sum += w[ 8] * abs(b2); + sum += w[12] * abs(b3); + } + 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) >> 5; +} + +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], + const VP8Matrix* const mtx) { + int last = -1; + 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 * (int)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); + const uint32_t coeff = sign ? -in[j] : in[j]; + assert(mtx->sharpen_[j] == 0); + 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 * (int)Q; + out[n] = level; + if (level) 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 w, int h) { + int y; + 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, 4); +} + +static void Copy16x8(const uint8_t* src, uint8_t* dst) { + Copy(src, dst, 16, 8); +} + +//------------------------------------------------------------------------------ + +static void SSIMAccumulateClipped(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int xo, int yo, int W, int H, + VP8DistoStats* const stats) { + const int ymin = (yo - VP8_SSIM_KERNEL < 0) ? 0 : yo - VP8_SSIM_KERNEL; + const int ymax = (yo + VP8_SSIM_KERNEL > H - 1) ? H - 1 + : yo + VP8_SSIM_KERNEL; + const int xmin = (xo - VP8_SSIM_KERNEL < 0) ? 0 : xo - VP8_SSIM_KERNEL; + const int xmax = (xo + VP8_SSIM_KERNEL > W - 1) ? W - 1 + : xo + VP8_SSIM_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; + } + } +} + +static void SSIMAccumulate(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + VP8DistoStats* const stats) { + int x, y; + for (y = 0; y <= 2 * VP8_SSIM_KERNEL; ++y, src1 += stride1, src2 += stride2) { + for (x = 0; x <= 2 * VP8_SSIM_KERNEL; ++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; + } + } +} + +VP8SSIMAccumulateFunc VP8SSIMAccumulate; +VP8SSIMAccumulateClippedFunc VP8SSIMAccumulateClipped; + +static volatile VP8CPUInfo ssim_last_cpuinfo_used = + (VP8CPUInfo)&ssim_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void VP8SSIMDspInit(void) { + if (ssim_last_cpuinfo_used == VP8GetCPUInfo) return; + + VP8SSIMAccumulate = SSIMAccumulate; + VP8SSIMAccumulateClipped = SSIMAccumulateClipped; + + ssim_last_cpuinfo_used = VP8GetCPUInfo; +} + +//------------------------------------------------------------------------------ +// Initialization + +// Speed-critical function pointers. We have to initialize them to the default +// implementations within VP8EncDspInit(). +VP8CHisto VP8CollectHistogram; +VP8Idct VP8ITransform; +VP8Fdct VP8FTransform; +VP8Fdct VP8FTransform2; +VP8WHT VP8FTransformWHT; +VP8Intra4Preds VP8EncPredLuma4; +VP8IntraPreds VP8EncPredLuma16; +VP8IntraPreds VP8EncPredChroma8; +VP8Metric VP8SSE16x16; +VP8Metric VP8SSE8x8; +VP8Metric VP8SSE16x8; +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; + +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; + VP8FTransform2 = FTransform2; + VP8FTransformWHT = FTransformWHT; + VP8EncPredLuma4 = Intra4Preds; + VP8EncPredLuma16 = Intra16Preds; + VP8EncPredChroma8 = IntraChromaPreds; + VP8SSE16x16 = SSE16x16; + VP8SSE8x8 = SSE8x8; + VP8SSE16x8 = SSE16x8; + VP8SSE4x4 = SSE4x4; + 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 != 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; +} diff --git a/thirdparty/libwebp/dsp/enc_avx2.c b/thirdparty/libwebp/dsp/enc_avx2.c new file mode 100644 index 0000000000..93efb30b10 --- /dev/null +++ b/thirdparty/libwebp/dsp/enc_avx2.c @@ -0,0 +1,21 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// AVX2 version of speed-critical encoding functions. + +#include "./dsp.h" + +#if defined(WEBP_USE_AVX2) + +#endif // WEBP_USE_AVX2 + +//------------------------------------------------------------------------------ +// Entry point + +WEBP_DSP_INIT_STUB(VP8EncDspInitAVX2) diff --git a/thirdparty/libwebp/dsp/enc_mips32.c b/thirdparty/libwebp/dsp/enc_mips32.c new file mode 100644 index 0000000000..fd10143de9 --- /dev/null +++ b/thirdparty/libwebp/dsp/enc_mips32.c @@ -0,0 +1,672 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS version of speed-critical encoding functions. +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) +// Jovan Zelincevic (jovan.zelincevic@imgtec.com) +// Slobodan Prijic (slobodan.prijic@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS32) + +#include "./mips_macro.h" +#include "../enc/vp8enci.h" +#include "../enc/cost.h" + +static const int kC1 = 20091 + (1 << 16); +static const int kC2 = 35468; + +// macro for one vertical pass in ITransformOne +// MUL macro inlined +// temp0..temp15 holds tmp[0]..tmp[15] +// A..D - offsets in bytes to load from in buffer +// TEMP0..TEMP3 - registers for corresponding tmp elements +// TEMP4..TEMP5 - temporary registers +#define VERTICAL_PASS(A, B, C, D, TEMP4, TEMP0, TEMP1, TEMP2, TEMP3) \ + "lh %[temp16], " #A "(%[temp20]) \n\t" \ + "lh %[temp18], " #B "(%[temp20]) \n\t" \ + "lh %[temp17], " #C "(%[temp20]) \n\t" \ + "lh %[temp19], " #D "(%[temp20]) \n\t" \ + "addu %[" #TEMP4 "], %[temp16], %[temp18] \n\t" \ + "subu %[temp16], %[temp16], %[temp18] \n\t" \ + "mul %[" #TEMP0 "], %[temp17], %[kC2] \n\t" \ + "mul %[temp18], %[temp19], %[kC1] \n\t" \ + "mul %[temp17], %[temp17], %[kC1] \n\t" \ + "mul %[temp19], %[temp19], %[kC2] \n\t" \ + "sra %[" #TEMP0 "], %[" #TEMP0 "], 16 \n\n" \ + "sra %[temp18], %[temp18], 16 \n\n" \ + "sra %[temp17], %[temp17], 16 \n\n" \ + "sra %[temp19], %[temp19], 16 \n\n" \ + "subu %[" #TEMP2 "], %[" #TEMP0 "], %[temp18] \n\t" \ + "addu %[" #TEMP3 "], %[temp17], %[temp19] \n\t" \ + "addu %[" #TEMP0 "], %[" #TEMP4 "], %[" #TEMP3 "] \n\t" \ + "addu %[" #TEMP1 "], %[temp16], %[" #TEMP2 "] \n\t" \ + "subu %[" #TEMP2 "], %[temp16], %[" #TEMP2 "] \n\t" \ + "subu %[" #TEMP3 "], %[" #TEMP4 "], %[" #TEMP3 "] \n\t" + +// macro for one horizontal pass in ITransformOne +// MUL and STORE macros inlined +// a = clip_8b(a) is replaced with: a = max(a, 0); a = min(a, 255) +// temp0..temp15 holds tmp[0]..tmp[15] +// A - offset in bytes to load from ref and store to dst buffer +// TEMP0, TEMP4, TEMP8 and TEMP12 - registers for corresponding tmp elements +#define HORIZONTAL_PASS(A, TEMP0, TEMP4, TEMP8, TEMP12) \ + "addiu %[" #TEMP0 "], %[" #TEMP0 "], 4 \n\t" \ + "addu %[temp16], %[" #TEMP0 "], %[" #TEMP8 "] \n\t" \ + "subu %[temp17], %[" #TEMP0 "], %[" #TEMP8 "] \n\t" \ + "mul %[" #TEMP0 "], %[" #TEMP4 "], %[kC2] \n\t" \ + "mul %[" #TEMP8 "], %[" #TEMP12 "], %[kC1] \n\t" \ + "mul %[" #TEMP4 "], %[" #TEMP4 "], %[kC1] \n\t" \ + "mul %[" #TEMP12 "], %[" #TEMP12 "], %[kC2] \n\t" \ + "sra %[" #TEMP0 "], %[" #TEMP0 "], 16 \n\t" \ + "sra %[" #TEMP8 "], %[" #TEMP8 "], 16 \n\t" \ + "sra %[" #TEMP4 "], %[" #TEMP4 "], 16 \n\t" \ + "sra %[" #TEMP12 "], %[" #TEMP12 "], 16 \n\t" \ + "subu %[temp18], %[" #TEMP0 "], %[" #TEMP8 "] \n\t" \ + "addu %[temp19], %[" #TEMP4 "], %[" #TEMP12 "] \n\t" \ + "addu %[" #TEMP0 "], %[temp16], %[temp19] \n\t" \ + "addu %[" #TEMP4 "], %[temp17], %[temp18] \n\t" \ + "subu %[" #TEMP8 "], %[temp17], %[temp18] \n\t" \ + "subu %[" #TEMP12 "], %[temp16], %[temp19] \n\t" \ + "lw %[temp20], 0(%[args]) \n\t" \ + "sra %[" #TEMP0 "], %[" #TEMP0 "], 3 \n\t" \ + "sra %[" #TEMP4 "], %[" #TEMP4 "], 3 \n\t" \ + "sra %[" #TEMP8 "], %[" #TEMP8 "], 3 \n\t" \ + "sra %[" #TEMP12 "], %[" #TEMP12 "], 3 \n\t" \ + "lbu %[temp16], 0+" XSTR(BPS) "*" #A "(%[temp20]) \n\t" \ + "lbu %[temp17], 1+" XSTR(BPS) "*" #A "(%[temp20]) \n\t" \ + "lbu %[temp18], 2+" XSTR(BPS) "*" #A "(%[temp20]) \n\t" \ + "lbu %[temp19], 3+" XSTR(BPS) "*" #A "(%[temp20]) \n\t" \ + "addu %[" #TEMP0 "], %[temp16], %[" #TEMP0 "] \n\t" \ + "addu %[" #TEMP4 "], %[temp17], %[" #TEMP4 "] \n\t" \ + "addu %[" #TEMP8 "], %[temp18], %[" #TEMP8 "] \n\t" \ + "addu %[" #TEMP12 "], %[temp19], %[" #TEMP12 "] \n\t" \ + "slt %[temp16], %[" #TEMP0 "], $zero \n\t" \ + "slt %[temp17], %[" #TEMP4 "], $zero \n\t" \ + "slt %[temp18], %[" #TEMP8 "], $zero \n\t" \ + "slt %[temp19], %[" #TEMP12 "], $zero \n\t" \ + "movn %[" #TEMP0 "], $zero, %[temp16] \n\t" \ + "movn %[" #TEMP4 "], $zero, %[temp17] \n\t" \ + "movn %[" #TEMP8 "], $zero, %[temp18] \n\t" \ + "movn %[" #TEMP12 "], $zero, %[temp19] \n\t" \ + "addiu %[temp20], $zero, 255 \n\t" \ + "slt %[temp16], %[" #TEMP0 "], %[temp20] \n\t" \ + "slt %[temp17], %[" #TEMP4 "], %[temp20] \n\t" \ + "slt %[temp18], %[" #TEMP8 "], %[temp20] \n\t" \ + "slt %[temp19], %[" #TEMP12 "], %[temp20] \n\t" \ + "movz %[" #TEMP0 "], %[temp20], %[temp16] \n\t" \ + "movz %[" #TEMP4 "], %[temp20], %[temp17] \n\t" \ + "lw %[temp16], 8(%[args]) \n\t" \ + "movz %[" #TEMP8 "], %[temp20], %[temp18] \n\t" \ + "movz %[" #TEMP12 "], %[temp20], %[temp19] \n\t" \ + "sb %[" #TEMP0 "], 0+" XSTR(BPS) "*" #A "(%[temp16]) \n\t" \ + "sb %[" #TEMP4 "], 1+" XSTR(BPS) "*" #A "(%[temp16]) \n\t" \ + "sb %[" #TEMP8 "], 2+" XSTR(BPS) "*" #A "(%[temp16]) \n\t" \ + "sb %[" #TEMP12 "], 3+" XSTR(BPS) "*" #A "(%[temp16]) \n\t" + +// Does one or two inverse transforms. +static WEBP_INLINE void ITransformOne(const uint8_t* ref, const int16_t* in, + uint8_t* dst) { + int temp0, temp1, temp2, temp3, temp4, temp5, temp6; + int temp7, temp8, temp9, temp10, temp11, temp12, temp13; + int temp14, temp15, temp16, temp17, temp18, temp19, temp20; + const int* args[3] = {(const int*)ref, (const int*)in, (const int*)dst}; + + __asm__ volatile( + "lw %[temp20], 4(%[args]) \n\t" + VERTICAL_PASS(0, 16, 8, 24, temp4, temp0, temp1, temp2, temp3) + VERTICAL_PASS(2, 18, 10, 26, temp8, temp4, temp5, temp6, temp7) + VERTICAL_PASS(4, 20, 12, 28, temp12, temp8, temp9, temp10, temp11) + VERTICAL_PASS(6, 22, 14, 30, temp20, temp12, temp13, temp14, temp15) + + HORIZONTAL_PASS(0, temp0, temp4, temp8, temp12) + HORIZONTAL_PASS(1, temp1, temp5, temp9, temp13) + HORIZONTAL_PASS(2, temp2, temp6, temp10, temp14) + HORIZONTAL_PASS(3, temp3, temp7, temp11, temp15) + + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), [temp11]"=&r"(temp11), + [temp12]"=&r"(temp12), [temp13]"=&r"(temp13), [temp14]"=&r"(temp14), + [temp15]"=&r"(temp15), [temp16]"=&r"(temp16), [temp17]"=&r"(temp17), + [temp18]"=&r"(temp18), [temp19]"=&r"(temp19), [temp20]"=&r"(temp20) + : [args]"r"(args), [kC1]"r"(kC1), [kC2]"r"(kC2) + : "memory", "hi", "lo" + ); +} + +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); + } +} + +#undef VERTICAL_PASS +#undef HORIZONTAL_PASS + +// macro for one pass through for loop in QuantizeBlock +// QUANTDIV macro inlined +// J - offset in bytes (kZigzag[n] * 2) +// K - offset in bytes (kZigzag[n] * 4) +// N - offset in bytes (n * 2) +#define QUANTIZE_ONE(J, K, N) \ + "lh %[temp0], " #J "(%[ppin]) \n\t" \ + "lhu %[temp1], " #J "(%[ppsharpen]) \n\t" \ + "lw %[temp2], " #K "(%[ppzthresh]) \n\t" \ + "sra %[sign], %[temp0], 15 \n\t" \ + "xor %[coeff], %[temp0], %[sign] \n\t" \ + "subu %[coeff], %[coeff], %[sign] \n\t" \ + "addu %[coeff], %[coeff], %[temp1] \n\t" \ + "slt %[temp4], %[temp2], %[coeff] \n\t" \ + "addiu %[temp5], $zero, 0 \n\t" \ + "addiu %[level], $zero, 0 \n\t" \ + "beqz %[temp4], 2f \n\t" \ + "lhu %[temp1], " #J "(%[ppiq]) \n\t" \ + "lw %[temp2], " #K "(%[ppbias]) \n\t" \ + "lhu %[temp3], " #J "(%[ppq]) \n\t" \ + "mul %[level], %[coeff], %[temp1] \n\t" \ + "addu %[level], %[level], %[temp2] \n\t" \ + "sra %[level], %[level], 17 \n\t" \ + "slt %[temp4], %[max_level], %[level] \n\t" \ + "movn %[level], %[max_level], %[temp4] \n\t" \ + "xor %[level], %[level], %[sign] \n\t" \ + "subu %[level], %[level], %[sign] \n\t" \ + "mul %[temp5], %[level], %[temp3] \n\t" \ +"2: \n\t" \ + "sh %[temp5], " #J "(%[ppin]) \n\t" \ + "sh %[level], " #N "(%[pout]) \n\t" + +static int QuantizeBlock(int16_t in[16], int16_t out[16], + const VP8Matrix* const mtx) { + int temp0, temp1, temp2, temp3, temp4, temp5; + int sign, coeff, level, i; + int max_level = MAX_LEVEL; + + int16_t* ppin = &in[0]; + int16_t* pout = &out[0]; + const uint16_t* ppsharpen = &mtx->sharpen_[0]; + const uint32_t* ppzthresh = &mtx->zthresh_[0]; + const uint16_t* ppq = &mtx->q_[0]; + const uint16_t* ppiq = &mtx->iq_[0]; + const uint32_t* ppbias = &mtx->bias_[0]; + + __asm__ volatile( + QUANTIZE_ONE( 0, 0, 0) + QUANTIZE_ONE( 2, 4, 2) + QUANTIZE_ONE( 8, 16, 4) + QUANTIZE_ONE(16, 32, 6) + QUANTIZE_ONE(10, 20, 8) + QUANTIZE_ONE( 4, 8, 10) + QUANTIZE_ONE( 6, 12, 12) + QUANTIZE_ONE(12, 24, 14) + QUANTIZE_ONE(18, 36, 16) + QUANTIZE_ONE(24, 48, 18) + QUANTIZE_ONE(26, 52, 20) + QUANTIZE_ONE(20, 40, 22) + QUANTIZE_ONE(14, 28, 24) + QUANTIZE_ONE(22, 44, 26) + QUANTIZE_ONE(28, 56, 28) + QUANTIZE_ONE(30, 60, 30) + + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [sign]"=&r"(sign), [coeff]"=&r"(coeff), + [level]"=&r"(level) + : [pout]"r"(pout), [ppin]"r"(ppin), + [ppiq]"r"(ppiq), [max_level]"r"(max_level), + [ppbias]"r"(ppbias), [ppzthresh]"r"(ppzthresh), + [ppsharpen]"r"(ppsharpen), [ppq]"r"(ppq) + : "memory", "hi", "lo" + ); + + // moved out from macro to increase possibility for earlier breaking + for (i = 15; i >= 0; i--) { + if (out[i]) return 1; + } + return 0; +} + +static int Quantize2Blocks(int16_t in[32], int16_t out[32], + const VP8Matrix* const mtx) { + int nz; + nz = QuantizeBlock(in + 0 * 16, out + 0 * 16, mtx) << 0; + nz |= QuantizeBlock(in + 1 * 16, out + 1 * 16, mtx) << 1; + return nz; +} + +#undef QUANTIZE_ONE + +// macro for one horizontal pass in Disto4x4 (TTransform) +// two calls of function TTransform are merged into single one +// A - offset in bytes to load from a and b buffers +// E..H - offsets in bytes to store first results to tmp buffer +// E1..H1 - offsets in bytes to store second results to tmp buffer +#define HORIZONTAL_PASS(A, E, F, G, H, E1, F1, G1, H1) \ + "lbu %[temp0], 0+" XSTR(BPS) "*" #A "(%[a]) \n\t" \ + "lbu %[temp1], 1+" XSTR(BPS) "*" #A "(%[a]) \n\t" \ + "lbu %[temp2], 2+" XSTR(BPS) "*" #A "(%[a]) \n\t" \ + "lbu %[temp3], 3+" XSTR(BPS) "*" #A "(%[a]) \n\t" \ + "lbu %[temp4], 0+" XSTR(BPS) "*" #A "(%[b]) \n\t" \ + "lbu %[temp5], 1+" XSTR(BPS) "*" #A "(%[b]) \n\t" \ + "lbu %[temp6], 2+" XSTR(BPS) "*" #A "(%[b]) \n\t" \ + "lbu %[temp7], 3+" XSTR(BPS) "*" #A "(%[b]) \n\t" \ + "addu %[temp8], %[temp0], %[temp2] \n\t" \ + "subu %[temp0], %[temp0], %[temp2] \n\t" \ + "addu %[temp2], %[temp1], %[temp3] \n\t" \ + "subu %[temp1], %[temp1], %[temp3] \n\t" \ + "addu %[temp3], %[temp4], %[temp6] \n\t" \ + "subu %[temp4], %[temp4], %[temp6] \n\t" \ + "addu %[temp6], %[temp5], %[temp7] \n\t" \ + "subu %[temp5], %[temp5], %[temp7] \n\t" \ + "addu %[temp7], %[temp8], %[temp2] \n\t" \ + "subu %[temp2], %[temp8], %[temp2] \n\t" \ + "addu %[temp8], %[temp0], %[temp1] \n\t" \ + "subu %[temp0], %[temp0], %[temp1] \n\t" \ + "addu %[temp1], %[temp3], %[temp6] \n\t" \ + "subu %[temp3], %[temp3], %[temp6] \n\t" \ + "addu %[temp6], %[temp4], %[temp5] \n\t" \ + "subu %[temp4], %[temp4], %[temp5] \n\t" \ + "sw %[temp7], " #E "(%[tmp]) \n\t" \ + "sw %[temp2], " #H "(%[tmp]) \n\t" \ + "sw %[temp8], " #F "(%[tmp]) \n\t" \ + "sw %[temp0], " #G "(%[tmp]) \n\t" \ + "sw %[temp1], " #E1 "(%[tmp]) \n\t" \ + "sw %[temp3], " #H1 "(%[tmp]) \n\t" \ + "sw %[temp6], " #F1 "(%[tmp]) \n\t" \ + "sw %[temp4], " #G1 "(%[tmp]) \n\t" + +// macro for one vertical pass in Disto4x4 (TTransform) +// two calls of function TTransform are merged into single one +// since only one accu is available in mips32r1 instruction set +// first is done second call of function TTransform and after +// that first one. +// const int sum1 = TTransform(a, w); +// const int sum2 = TTransform(b, w); +// return abs(sum2 - sum1) >> 5; +// (sum2 - sum1) is calculated with madds (sub2) and msubs (sub1) +// A..D - offsets in bytes to load first results from tmp buffer +// A1..D1 - offsets in bytes to load second results from tmp buffer +// E..H - offsets in bytes to load from w buffer +#define VERTICAL_PASS(A, B, C, D, A1, B1, C1, D1, E, F, G, H) \ + "lw %[temp0], " #A1 "(%[tmp]) \n\t" \ + "lw %[temp1], " #C1 "(%[tmp]) \n\t" \ + "lw %[temp2], " #B1 "(%[tmp]) \n\t" \ + "lw %[temp3], " #D1 "(%[tmp]) \n\t" \ + "addu %[temp8], %[temp0], %[temp1] \n\t" \ + "subu %[temp0], %[temp0], %[temp1] \n\t" \ + "addu %[temp1], %[temp2], %[temp3] \n\t" \ + "subu %[temp2], %[temp2], %[temp3] \n\t" \ + "addu %[temp3], %[temp8], %[temp1] \n\t" \ + "subu %[temp8], %[temp8], %[temp1] \n\t" \ + "addu %[temp1], %[temp0], %[temp2] \n\t" \ + "subu %[temp0], %[temp0], %[temp2] \n\t" \ + "sra %[temp4], %[temp3], 31 \n\t" \ + "sra %[temp5], %[temp1], 31 \n\t" \ + "sra %[temp6], %[temp0], 31 \n\t" \ + "sra %[temp7], %[temp8], 31 \n\t" \ + "xor %[temp3], %[temp3], %[temp4] \n\t" \ + "xor %[temp1], %[temp1], %[temp5] \n\t" \ + "xor %[temp0], %[temp0], %[temp6] \n\t" \ + "xor %[temp8], %[temp8], %[temp7] \n\t" \ + "subu %[temp3], %[temp3], %[temp4] \n\t" \ + "subu %[temp1], %[temp1], %[temp5] \n\t" \ + "subu %[temp0], %[temp0], %[temp6] \n\t" \ + "subu %[temp8], %[temp8], %[temp7] \n\t" \ + "lhu %[temp4], " #E "(%[w]) \n\t" \ + "lhu %[temp5], " #F "(%[w]) \n\t" \ + "lhu %[temp6], " #G "(%[w]) \n\t" \ + "lhu %[temp7], " #H "(%[w]) \n\t" \ + "madd %[temp4], %[temp3] \n\t" \ + "madd %[temp5], %[temp1] \n\t" \ + "madd %[temp6], %[temp0] \n\t" \ + "madd %[temp7], %[temp8] \n\t" \ + "lw %[temp0], " #A "(%[tmp]) \n\t" \ + "lw %[temp1], " #C "(%[tmp]) \n\t" \ + "lw %[temp2], " #B "(%[tmp]) \n\t" \ + "lw %[temp3], " #D "(%[tmp]) \n\t" \ + "addu %[temp8], %[temp0], %[temp1] \n\t" \ + "subu %[temp0], %[temp0], %[temp1] \n\t" \ + "addu %[temp1], %[temp2], %[temp3] \n\t" \ + "subu %[temp2], %[temp2], %[temp3] \n\t" \ + "addu %[temp3], %[temp8], %[temp1] \n\t" \ + "subu %[temp1], %[temp8], %[temp1] \n\t" \ + "addu %[temp8], %[temp0], %[temp2] \n\t" \ + "subu %[temp0], %[temp0], %[temp2] \n\t" \ + "sra %[temp2], %[temp3], 31 \n\t" \ + "xor %[temp3], %[temp3], %[temp2] \n\t" \ + "subu %[temp3], %[temp3], %[temp2] \n\t" \ + "msub %[temp4], %[temp3] \n\t" \ + "sra %[temp2], %[temp8], 31 \n\t" \ + "sra %[temp3], %[temp0], 31 \n\t" \ + "sra %[temp4], %[temp1], 31 \n\t" \ + "xor %[temp8], %[temp8], %[temp2] \n\t" \ + "xor %[temp0], %[temp0], %[temp3] \n\t" \ + "xor %[temp1], %[temp1], %[temp4] \n\t" \ + "subu %[temp8], %[temp8], %[temp2] \n\t" \ + "subu %[temp0], %[temp0], %[temp3] \n\t" \ + "subu %[temp1], %[temp1], %[temp4] \n\t" \ + "msub %[temp5], %[temp8] \n\t" \ + "msub %[temp6], %[temp0] \n\t" \ + "msub %[temp7], %[temp1] \n\t" + +static int Disto4x4(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + int tmp[32]; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8; + + __asm__ volatile( + HORIZONTAL_PASS(0, 0, 4, 8, 12, 64, 68, 72, 76) + HORIZONTAL_PASS(1, 16, 20, 24, 28, 80, 84, 88, 92) + HORIZONTAL_PASS(2, 32, 36, 40, 44, 96, 100, 104, 108) + HORIZONTAL_PASS(3, 48, 52, 56, 60, 112, 116, 120, 124) + "mthi $zero \n\t" + "mtlo $zero \n\t" + VERTICAL_PASS( 0, 16, 32, 48, 64, 80, 96, 112, 0, 8, 16, 24) + VERTICAL_PASS( 4, 20, 36, 52, 68, 84, 100, 116, 2, 10, 18, 26) + VERTICAL_PASS( 8, 24, 40, 56, 72, 88, 104, 120, 4, 12, 20, 28) + VERTICAL_PASS(12, 28, 44, 60, 76, 92, 108, 124, 6, 14, 22, 30) + "mflo %[temp0] \n\t" + "sra %[temp1], %[temp0], 31 \n\t" + "xor %[temp0], %[temp0], %[temp1] \n\t" + "subu %[temp0], %[temp0], %[temp1] \n\t" + "sra %[temp0], %[temp0], 5 \n\t" + + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8) + : [a]"r"(a), [b]"r"(b), [w]"r"(w), [tmp]"r"(tmp) + : "memory", "hi", "lo" + ); + + return temp0; +} + +#undef VERTICAL_PASS +#undef HORIZONTAL_PASS + +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; +} + +// macro for one horizontal pass in FTransform +// temp0..temp15 holds tmp[0]..tmp[15] +// A - offset in bytes to load from src and ref buffers +// TEMP0..TEMP3 - registers for corresponding tmp elements +#define HORIZONTAL_PASS(A, TEMP0, TEMP1, TEMP2, TEMP3) \ + "lw %[" #TEMP1 "], 0(%[args]) \n\t" \ + "lw %[" #TEMP2 "], 4(%[args]) \n\t" \ + "lbu %[temp16], 0+" XSTR(BPS) "*" #A "(%[" #TEMP1 "]) \n\t" \ + "lbu %[temp17], 0+" XSTR(BPS) "*" #A "(%[" #TEMP2 "]) \n\t" \ + "lbu %[temp18], 1+" XSTR(BPS) "*" #A "(%[" #TEMP1 "]) \n\t" \ + "lbu %[temp19], 1+" XSTR(BPS) "*" #A "(%[" #TEMP2 "]) \n\t" \ + "subu %[temp20], %[temp16], %[temp17] \n\t" \ + "lbu %[temp16], 2+" XSTR(BPS) "*" #A "(%[" #TEMP1 "]) \n\t" \ + "lbu %[temp17], 2+" XSTR(BPS) "*" #A "(%[" #TEMP2 "]) \n\t" \ + "subu %[" #TEMP0 "], %[temp18], %[temp19] \n\t" \ + "lbu %[temp18], 3+" XSTR(BPS) "*" #A "(%[" #TEMP1 "]) \n\t" \ + "lbu %[temp19], 3+" XSTR(BPS) "*" #A "(%[" #TEMP2 "]) \n\t" \ + "subu %[" #TEMP1 "], %[temp16], %[temp17] \n\t" \ + "subu %[" #TEMP2 "], %[temp18], %[temp19] \n\t" \ + "addu %[" #TEMP3 "], %[temp20], %[" #TEMP2 "] \n\t" \ + "subu %[" #TEMP2 "], %[temp20], %[" #TEMP2 "] \n\t" \ + "addu %[temp20], %[" #TEMP0 "], %[" #TEMP1 "] \n\t" \ + "subu %[" #TEMP0 "], %[" #TEMP0 "], %[" #TEMP1 "] \n\t" \ + "mul %[temp16], %[" #TEMP2 "], %[c5352] \n\t" \ + "mul %[temp17], %[" #TEMP2 "], %[c2217] \n\t" \ + "mul %[temp18], %[" #TEMP0 "], %[c5352] \n\t" \ + "mul %[temp19], %[" #TEMP0 "], %[c2217] \n\t" \ + "addu %[" #TEMP1 "], %[" #TEMP3 "], %[temp20] \n\t" \ + "subu %[temp20], %[" #TEMP3 "], %[temp20] \n\t" \ + "sll %[" #TEMP0 "], %[" #TEMP1 "], 3 \n\t" \ + "sll %[" #TEMP2 "], %[temp20], 3 \n\t" \ + "addiu %[temp16], %[temp16], 1812 \n\t" \ + "addiu %[temp17], %[temp17], 937 \n\t" \ + "addu %[temp16], %[temp16], %[temp19] \n\t" \ + "subu %[temp17], %[temp17], %[temp18] \n\t" \ + "sra %[" #TEMP1 "], %[temp16], 9 \n\t" \ + "sra %[" #TEMP3 "], %[temp17], 9 \n\t" + +// macro for one vertical pass in FTransform +// temp0..temp15 holds tmp[0]..tmp[15] +// A..D - offsets in bytes to store to out buffer +// TEMP0, TEMP4, TEMP8 and TEMP12 - registers for corresponding tmp elements +#define VERTICAL_PASS(A, B, C, D, TEMP0, TEMP4, TEMP8, TEMP12) \ + "addu %[temp16], %[" #TEMP0 "], %[" #TEMP12 "] \n\t" \ + "subu %[temp19], %[" #TEMP0 "], %[" #TEMP12 "] \n\t" \ + "addu %[temp17], %[" #TEMP4 "], %[" #TEMP8 "] \n\t" \ + "subu %[temp18], %[" #TEMP4 "], %[" #TEMP8 "] \n\t" \ + "mul %[" #TEMP8 "], %[temp19], %[c2217] \n\t" \ + "mul %[" #TEMP12 "], %[temp18], %[c2217] \n\t" \ + "mul %[" #TEMP4 "], %[temp19], %[c5352] \n\t" \ + "mul %[temp18], %[temp18], %[c5352] \n\t" \ + "addiu %[temp16], %[temp16], 7 \n\t" \ + "addu %[" #TEMP0 "], %[temp16], %[temp17] \n\t" \ + "sra %[" #TEMP0 "], %[" #TEMP0 "], 4 \n\t" \ + "addu %[" #TEMP12 "], %[" #TEMP12 "], %[" #TEMP4 "] \n\t" \ + "subu %[" #TEMP4 "], %[temp16], %[temp17] \n\t" \ + "sra %[" #TEMP4 "], %[" #TEMP4 "], 4 \n\t" \ + "addiu %[" #TEMP8 "], %[" #TEMP8 "], 30000 \n\t" \ + "addiu %[" #TEMP12 "], %[" #TEMP12 "], 12000 \n\t" \ + "addiu %[" #TEMP8 "], %[" #TEMP8 "], 21000 \n\t" \ + "subu %[" #TEMP8 "], %[" #TEMP8 "], %[temp18] \n\t" \ + "sra %[" #TEMP12 "], %[" #TEMP12 "], 16 \n\t" \ + "sra %[" #TEMP8 "], %[" #TEMP8 "], 16 \n\t" \ + "addiu %[temp16], %[" #TEMP12 "], 1 \n\t" \ + "movn %[" #TEMP12 "], %[temp16], %[temp19] \n\t" \ + "sh %[" #TEMP0 "], " #A "(%[temp20]) \n\t" \ + "sh %[" #TEMP4 "], " #C "(%[temp20]) \n\t" \ + "sh %[" #TEMP8 "], " #D "(%[temp20]) \n\t" \ + "sh %[" #TEMP12 "], " #B "(%[temp20]) \n\t" + +static void FTransform(const uint8_t* src, const uint8_t* ref, int16_t* out) { + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8; + int temp9, temp10, temp11, temp12, temp13, temp14, temp15, temp16; + int temp17, temp18, temp19, temp20; + const int c2217 = 2217; + const int c5352 = 5352; + const int* const args[3] = + { (const int*)src, (const int*)ref, (const int*)out }; + + __asm__ volatile( + HORIZONTAL_PASS(0, temp0, temp1, temp2, temp3) + HORIZONTAL_PASS(1, temp4, temp5, temp6, temp7) + HORIZONTAL_PASS(2, temp8, temp9, temp10, temp11) + HORIZONTAL_PASS(3, temp12, temp13, temp14, temp15) + "lw %[temp20], 8(%[args]) \n\t" + VERTICAL_PASS(0, 8, 16, 24, temp0, temp4, temp8, temp12) + VERTICAL_PASS(2, 10, 18, 26, temp1, temp5, temp9, temp13) + VERTICAL_PASS(4, 12, 20, 28, temp2, temp6, temp10, temp14) + VERTICAL_PASS(6, 14, 22, 30, temp3, temp7, temp11, temp15) + + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), [temp11]"=&r"(temp11), + [temp12]"=&r"(temp12), [temp13]"=&r"(temp13), [temp14]"=&r"(temp14), + [temp15]"=&r"(temp15), [temp16]"=&r"(temp16), [temp17]"=&r"(temp17), + [temp18]"=&r"(temp18), [temp19]"=&r"(temp19), [temp20]"=&r"(temp20) + : [args]"r"(args), [c2217]"r"(c2217), [c5352]"r"(c5352) + : "memory", "hi", "lo" + ); +} + +#undef VERTICAL_PASS +#undef HORIZONTAL_PASS + +#if !defined(WORK_AROUND_GCC) + +#define GET_SSE_INNER(A, B, C, D) \ + "lbu %[temp0], " #A "(%[a]) \n\t" \ + "lbu %[temp1], " #A "(%[b]) \n\t" \ + "lbu %[temp2], " #B "(%[a]) \n\t" \ + "lbu %[temp3], " #B "(%[b]) \n\t" \ + "lbu %[temp4], " #C "(%[a]) \n\t" \ + "lbu %[temp5], " #C "(%[b]) \n\t" \ + "lbu %[temp6], " #D "(%[a]) \n\t" \ + "lbu %[temp7], " #D "(%[b]) \n\t" \ + "subu %[temp0], %[temp0], %[temp1] \n\t" \ + "subu %[temp2], %[temp2], %[temp3] \n\t" \ + "subu %[temp4], %[temp4], %[temp5] \n\t" \ + "subu %[temp6], %[temp6], %[temp7] \n\t" \ + "madd %[temp0], %[temp0] \n\t" \ + "madd %[temp2], %[temp2] \n\t" \ + "madd %[temp4], %[temp4] \n\t" \ + "madd %[temp6], %[temp6] \n\t" + +#define GET_SSE(A, B, C, D) \ + GET_SSE_INNER(A, A + 1, A + 2, A + 3) \ + GET_SSE_INNER(B, B + 1, B + 2, B + 3) \ + GET_SSE_INNER(C, C + 1, C + 2, C + 3) \ + GET_SSE_INNER(D, D + 1, D + 2, D + 3) + +static int SSE16x16(const uint8_t* a, const uint8_t* b) { + int count; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; + + __asm__ volatile( + "mult $zero, $zero \n\t" + + GET_SSE( 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS) + GET_SSE( 1 * BPS, 4 + 1 * BPS, 8 + 1 * BPS, 12 + 1 * BPS) + GET_SSE( 2 * BPS, 4 + 2 * BPS, 8 + 2 * BPS, 12 + 2 * BPS) + GET_SSE( 3 * BPS, 4 + 3 * BPS, 8 + 3 * BPS, 12 + 3 * BPS) + GET_SSE( 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS) + GET_SSE( 5 * BPS, 4 + 5 * BPS, 8 + 5 * BPS, 12 + 5 * BPS) + GET_SSE( 6 * BPS, 4 + 6 * BPS, 8 + 6 * BPS, 12 + 6 * BPS) + GET_SSE( 7 * BPS, 4 + 7 * BPS, 8 + 7 * BPS, 12 + 7 * BPS) + GET_SSE( 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS) + GET_SSE( 9 * BPS, 4 + 9 * BPS, 8 + 9 * BPS, 12 + 9 * BPS) + GET_SSE(10 * BPS, 4 + 10 * BPS, 8 + 10 * BPS, 12 + 10 * BPS) + GET_SSE(11 * BPS, 4 + 11 * BPS, 8 + 11 * BPS, 12 + 11 * BPS) + GET_SSE(12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS) + GET_SSE(13 * BPS, 4 + 13 * BPS, 8 + 13 * BPS, 12 + 13 * BPS) + GET_SSE(14 * BPS, 4 + 14 * BPS, 8 + 14 * BPS, 12 + 14 * BPS) + GET_SSE(15 * BPS, 4 + 15 * BPS, 8 + 15 * BPS, 12 + 15 * BPS) + + "mflo %[count] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [count]"=&r"(count) + : [a]"r"(a), [b]"r"(b) + : "memory", "hi", "lo" + ); + return count; +} + +static int SSE16x8(const uint8_t* a, const uint8_t* b) { + int count; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; + + __asm__ volatile( + "mult $zero, $zero \n\t" + + GET_SSE( 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS) + GET_SSE( 1 * BPS, 4 + 1 * BPS, 8 + 1 * BPS, 12 + 1 * BPS) + GET_SSE( 2 * BPS, 4 + 2 * BPS, 8 + 2 * BPS, 12 + 2 * BPS) + GET_SSE( 3 * BPS, 4 + 3 * BPS, 8 + 3 * BPS, 12 + 3 * BPS) + GET_SSE( 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS) + GET_SSE( 5 * BPS, 4 + 5 * BPS, 8 + 5 * BPS, 12 + 5 * BPS) + GET_SSE( 6 * BPS, 4 + 6 * BPS, 8 + 6 * BPS, 12 + 6 * BPS) + GET_SSE( 7 * BPS, 4 + 7 * BPS, 8 + 7 * BPS, 12 + 7 * BPS) + + "mflo %[count] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [count]"=&r"(count) + : [a]"r"(a), [b]"r"(b) + : "memory", "hi", "lo" + ); + return count; +} + +static int SSE8x8(const uint8_t* a, const uint8_t* b) { + int count; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; + + __asm__ volatile( + "mult $zero, $zero \n\t" + + GET_SSE(0 * BPS, 4 + 0 * BPS, 1 * BPS, 4 + 1 * BPS) + GET_SSE(2 * BPS, 4 + 2 * BPS, 3 * BPS, 4 + 3 * BPS) + GET_SSE(4 * BPS, 4 + 4 * BPS, 5 * BPS, 4 + 5 * BPS) + GET_SSE(6 * BPS, 4 + 6 * BPS, 7 * BPS, 4 + 7 * BPS) + + "mflo %[count] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [count]"=&r"(count) + : [a]"r"(a), [b]"r"(b) + : "memory", "hi", "lo" + ); + return count; +} + +static int SSE4x4(const uint8_t* a, const uint8_t* b) { + int count; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; + + __asm__ volatile( + "mult $zero, $zero \n\t" + + GET_SSE(0 * BPS, 1 * BPS, 2 * BPS, 3 * BPS) + + "mflo %[count] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [count]"=&r"(count) + : [a]"r"(a), [b]"r"(b) + : "memory", "hi", "lo" + ); + return count; +} + +#undef GET_SSE +#undef GET_SSE_INNER + +#endif // !WORK_AROUND_GCC + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspInitMIPS32(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitMIPS32(void) { + VP8ITransform = ITransform; + VP8FTransform = FTransform; + VP8EncQuantizeBlock = QuantizeBlock; + VP8EncQuantize2Blocks = Quantize2Blocks; + VP8TDisto4x4 = Disto4x4; + VP8TDisto16x16 = Disto16x16; +#if !defined(WORK_AROUND_GCC) + VP8SSE16x16 = SSE16x16; + VP8SSE8x8 = SSE8x8; + VP8SSE16x8 = SSE16x8; + VP8SSE4x4 = SSE4x4; +#endif +} + +#else // !WEBP_USE_MIPS32 + +WEBP_DSP_INIT_STUB(VP8EncDspInitMIPS32) + +#endif // WEBP_USE_MIPS32 diff --git a/thirdparty/libwebp/dsp/enc_mips_dsp_r2.c b/thirdparty/libwebp/dsp/enc_mips_dsp_r2.c new file mode 100644 index 0000000000..7ab96f6800 --- /dev/null +++ b/thirdparty/libwebp/dsp/enc_mips_dsp_r2.c @@ -0,0 +1,1510 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS version of speed-critical encoding functions. +// +// Author(s): Darko Laus (darko.laus@imgtec.com) +// Mirko Raus (mirko.raus@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include "./mips_macro.h" +#include "../enc/cost.h" +#include "../enc/vp8enci.h" + +static const int kC1 = 20091 + (1 << 16); +static const int kC2 = 35468; + +// O - output +// I - input (macro doesn't change it) +#define ADD_SUB_HALVES_X4(O0, O1, O2, O3, O4, O5, O6, O7, \ + I0, I1, I2, I3, I4, I5, I6, I7) \ + "addq.ph %[" #O0 "], %[" #I0 "], %[" #I1 "] \n\t" \ + "subq.ph %[" #O1 "], %[" #I0 "], %[" #I1 "] \n\t" \ + "addq.ph %[" #O2 "], %[" #I2 "], %[" #I3 "] \n\t" \ + "subq.ph %[" #O3 "], %[" #I2 "], %[" #I3 "] \n\t" \ + "addq.ph %[" #O4 "], %[" #I4 "], %[" #I5 "] \n\t" \ + "subq.ph %[" #O5 "], %[" #I4 "], %[" #I5 "] \n\t" \ + "addq.ph %[" #O6 "], %[" #I6 "], %[" #I7 "] \n\t" \ + "subq.ph %[" #O7 "], %[" #I6 "], %[" #I7 "] \n\t" + +// IO - input/output +#define ABS_X8(IO0, IO1, IO2, IO3, IO4, IO5, IO6, IO7) \ + "absq_s.ph %[" #IO0 "], %[" #IO0 "] \n\t" \ + "absq_s.ph %[" #IO1 "], %[" #IO1 "] \n\t" \ + "absq_s.ph %[" #IO2 "], %[" #IO2 "] \n\t" \ + "absq_s.ph %[" #IO3 "], %[" #IO3 "] \n\t" \ + "absq_s.ph %[" #IO4 "], %[" #IO4 "] \n\t" \ + "absq_s.ph %[" #IO5 "], %[" #IO5 "] \n\t" \ + "absq_s.ph %[" #IO6 "], %[" #IO6 "] \n\t" \ + "absq_s.ph %[" #IO7 "], %[" #IO7 "] \n\t" + +// dpa.w.ph $ac0 temp0 ,temp1 +// $ac += temp0[31..16] * temp1[31..16] + temp0[15..0] * temp1[15..0] +// dpax.w.ph $ac0 temp0 ,temp1 +// $ac += temp0[31..16] * temp1[15..0] + temp0[15..0] * temp1[31..16] +// O - output +// I - input (macro doesn't change it) +#define MUL_HALF(O0, I0, I1, I2, I3, I4, I5, I6, I7, \ + I8, I9, I10, I11, I12, I13, I14, I15) \ + "mult $ac0, $zero, $zero \n\t" \ + "dpa.w.ph $ac0, %[" #I2 "], %[" #I0 "] \n\t" \ + "dpax.w.ph $ac0, %[" #I5 "], %[" #I6 "] \n\t" \ + "dpa.w.ph $ac0, %[" #I8 "], %[" #I9 "] \n\t" \ + "dpax.w.ph $ac0, %[" #I11 "], %[" #I4 "] \n\t" \ + "dpa.w.ph $ac0, %[" #I12 "], %[" #I7 "] \n\t" \ + "dpax.w.ph $ac0, %[" #I13 "], %[" #I1 "] \n\t" \ + "dpa.w.ph $ac0, %[" #I14 "], %[" #I3 "] \n\t" \ + "dpax.w.ph $ac0, %[" #I15 "], %[" #I10 "] \n\t" \ + "mflo %[" #O0 "], $ac0 \n\t" + +#define OUTPUT_EARLY_CLOBBER_REGS_17() \ + OUTPUT_EARLY_CLOBBER_REGS_10(), \ + [temp11]"=&r"(temp11), [temp12]"=&r"(temp12), [temp13]"=&r"(temp13), \ + [temp14]"=&r"(temp14), [temp15]"=&r"(temp15), [temp16]"=&r"(temp16), \ + [temp17]"=&r"(temp17) + +// macro for one horizontal pass in FTransform +// temp0..temp15 holds tmp[0]..tmp[15] +// A - offset in bytes to load from src and ref buffers +// TEMP0..TEMP3 - registers for corresponding tmp elements +#define HORIZONTAL_PASS(A, TEMP0, TEMP1, TEMP2, TEMP3) \ + "lw %[" #TEMP0 "], 0(%[args]) \n\t" \ + "lw %[" #TEMP1 "], 4(%[args]) \n\t" \ + "lw %[" #TEMP2 "], " XSTR(BPS) "*" #A "(%[" #TEMP0 "]) \n\t" \ + "lw %[" #TEMP3 "], " XSTR(BPS) "*" #A "(%[" #TEMP1 "]) \n\t" \ + "preceu.ph.qbl %[" #TEMP0 "], %[" #TEMP2 "] \n\t" \ + "preceu.ph.qbl %[" #TEMP1 "], %[" #TEMP3 "] \n\t" \ + "preceu.ph.qbr %[" #TEMP2 "], %[" #TEMP2 "] \n\t" \ + "preceu.ph.qbr %[" #TEMP3 "], %[" #TEMP3 "] \n\t" \ + "subq.ph %[" #TEMP0 "], %[" #TEMP0 "], %[" #TEMP1 "] \n\t" \ + "subq.ph %[" #TEMP2 "], %[" #TEMP2 "], %[" #TEMP3 "] \n\t" \ + "rotr %[" #TEMP0 "], %[" #TEMP0 "], 16 \n\t" \ + "addq.ph %[" #TEMP1 "], %[" #TEMP2 "], %[" #TEMP0 "] \n\t" \ + "subq.ph %[" #TEMP3 "], %[" #TEMP2 "], %[" #TEMP0 "] \n\t" \ + "seh %[" #TEMP0 "], %[" #TEMP1 "] \n\t" \ + "sra %[temp16], %[" #TEMP1 "], 16 \n\t" \ + "seh %[temp19], %[" #TEMP3 "] \n\t" \ + "sra %[" #TEMP3 "], %[" #TEMP3 "], 16 \n\t" \ + "subu %[" #TEMP2 "], %[" #TEMP0 "], %[temp16] \n\t" \ + "addu %[" #TEMP0 "], %[" #TEMP0 "], %[temp16] \n\t" \ + "mul %[temp17], %[temp19], %[c2217] \n\t" \ + "mul %[temp18], %[" #TEMP3 "], %[c5352] \n\t" \ + "mul %[" #TEMP1 "], %[temp19], %[c5352] \n\t" \ + "mul %[temp16], %[" #TEMP3 "], %[c2217] \n\t" \ + "sll %[" #TEMP2 "], %[" #TEMP2 "], 3 \n\t" \ + "sll %[" #TEMP0 "], %[" #TEMP0 "], 3 \n\t" \ + "subu %[" #TEMP3 "], %[temp17], %[temp18] \n\t" \ + "addu %[" #TEMP1 "], %[temp16], %[" #TEMP1 "] \n\t" \ + "addiu %[" #TEMP3 "], %[" #TEMP3 "], 937 \n\t" \ + "addiu %[" #TEMP1 "], %[" #TEMP1 "], 1812 \n\t" \ + "sra %[" #TEMP3 "], %[" #TEMP3 "], 9 \n\t" \ + "sra %[" #TEMP1 "], %[" #TEMP1 "], 9 \n\t" + +// macro for one vertical pass in FTransform +// temp0..temp15 holds tmp[0]..tmp[15] +// A..D - offsets in bytes to store to out buffer +// TEMP0, TEMP4, TEMP8 and TEMP12 - registers for corresponding tmp elements +#define VERTICAL_PASS(A, B, C, D, TEMP0, TEMP4, TEMP8, TEMP12) \ + "addu %[temp16], %[" #TEMP0 "], %[" #TEMP12 "] \n\t" \ + "subu %[temp19], %[" #TEMP0 "], %[" #TEMP12 "] \n\t" \ + "addu %[temp17], %[" #TEMP4 "], %[" #TEMP8 "] \n\t" \ + "subu %[temp18], %[" #TEMP4 "], %[" #TEMP8 "] \n\t" \ + "mul %[" #TEMP8 "], %[temp19], %[c2217] \n\t" \ + "mul %[" #TEMP12 "], %[temp18], %[c2217] \n\t" \ + "mul %[" #TEMP4 "], %[temp19], %[c5352] \n\t" \ + "mul %[temp18], %[temp18], %[c5352] \n\t" \ + "addiu %[temp16], %[temp16], 7 \n\t" \ + "addu %[" #TEMP0 "], %[temp16], %[temp17] \n\t" \ + "sra %[" #TEMP0 "], %[" #TEMP0 "], 4 \n\t" \ + "addu %[" #TEMP12 "], %[" #TEMP12 "], %[" #TEMP4 "] \n\t" \ + "subu %[" #TEMP4 "], %[temp16], %[temp17] \n\t" \ + "sra %[" #TEMP4 "], %[" #TEMP4 "], 4 \n\t" \ + "addiu %[" #TEMP8 "], %[" #TEMP8 "], 30000 \n\t" \ + "addiu %[" #TEMP12 "], %[" #TEMP12 "], 12000 \n\t" \ + "addiu %[" #TEMP8 "], %[" #TEMP8 "], 21000 \n\t" \ + "subu %[" #TEMP8 "], %[" #TEMP8 "], %[temp18] \n\t" \ + "sra %[" #TEMP12 "], %[" #TEMP12 "], 16 \n\t" \ + "sra %[" #TEMP8 "], %[" #TEMP8 "], 16 \n\t" \ + "addiu %[temp16], %[" #TEMP12 "], 1 \n\t" \ + "movn %[" #TEMP12 "], %[temp16], %[temp19] \n\t" \ + "sh %[" #TEMP0 "], " #A "(%[temp20]) \n\t" \ + "sh %[" #TEMP4 "], " #C "(%[temp20]) \n\t" \ + "sh %[" #TEMP8 "], " #D "(%[temp20]) \n\t" \ + "sh %[" #TEMP12 "], " #B "(%[temp20]) \n\t" + +static void FTransform(const uint8_t* src, const uint8_t* ref, int16_t* out) { + const int c2217 = 2217; + const int c5352 = 5352; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8; + int temp9, temp10, temp11, temp12, temp13, temp14, temp15, temp16; + int temp17, temp18, temp19, temp20; + const int* const args[3] = + { (const int*)src, (const int*)ref, (const int*)out }; + + __asm__ volatile ( + HORIZONTAL_PASS(0, temp0, temp1, temp2, temp3) + HORIZONTAL_PASS(1, temp4, temp5, temp6, temp7) + HORIZONTAL_PASS(2, temp8, temp9, temp10, temp11) + HORIZONTAL_PASS(3, temp12, temp13, temp14, temp15) + "lw %[temp20], 8(%[args]) \n\t" + VERTICAL_PASS(0, 8, 16, 24, temp0, temp4, temp8, temp12) + VERTICAL_PASS(2, 10, 18, 26, temp1, temp5, temp9, temp13) + VERTICAL_PASS(4, 12, 20, 28, temp2, temp6, temp10, temp14) + VERTICAL_PASS(6, 14, 22, 30, temp3, temp7, temp11, temp15) + OUTPUT_EARLY_CLOBBER_REGS_18(), + [temp0]"=&r"(temp0), [temp19]"=&r"(temp19), [temp20]"=&r"(temp20) + : [args]"r"(args), [c2217]"r"(c2217), [c5352]"r"(c5352) + : "memory", "hi", "lo" + ); +} + +#undef VERTICAL_PASS +#undef HORIZONTAL_PASS + +static WEBP_INLINE void ITransformOne(const uint8_t* ref, const int16_t* in, + uint8_t* dst) { + int temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, temp9; + int temp10, temp11, temp12, temp13, temp14, temp15, temp16, temp17, temp18; + + __asm__ volatile ( + "ulw %[temp1], 0(%[in]) \n\t" + "ulw %[temp2], 16(%[in]) \n\t" + LOAD_IN_X2(temp5, temp6, 24, 26) + ADD_SUB_HALVES(temp3, temp4, temp1, temp2) + LOAD_IN_X2(temp1, temp2, 8, 10) + MUL_SHIFT_SUM(temp7, temp8, temp9, temp10, temp11, temp12, temp13, temp14, + temp10, temp8, temp9, temp7, temp1, temp2, temp5, temp6, + temp13, temp11, temp14, temp12) + INSERT_HALF_X2(temp8, temp7, temp10, temp9) + "ulw %[temp17], 4(%[in]) \n\t" + "ulw %[temp18], 20(%[in]) \n\t" + ADD_SUB_HALVES(temp1, temp2, temp3, temp8) + ADD_SUB_HALVES(temp5, temp6, temp4, temp7) + ADD_SUB_HALVES(temp7, temp8, temp17, temp18) + LOAD_IN_X2(temp17, temp18, 12, 14) + LOAD_IN_X2(temp9, temp10, 28, 30) + MUL_SHIFT_SUM(temp11, temp12, temp13, temp14, temp15, temp16, temp4, temp17, + temp12, temp14, temp11, temp13, temp17, temp18, temp9, temp10, + temp15, temp4, temp16, temp17) + INSERT_HALF_X2(temp11, temp12, temp13, temp14) + ADD_SUB_HALVES(temp17, temp8, temp8, temp11) + ADD_SUB_HALVES(temp3, temp4, temp7, temp12) + + // horizontal + SRA_16(temp9, temp10, temp11, temp12, temp1, temp2, temp5, temp6) + INSERT_HALF_X2(temp1, temp6, temp5, temp2) + SRA_16(temp13, temp14, temp15, temp16, temp3, temp4, temp17, temp8) + "repl.ph %[temp2], 0x4 \n\t" + INSERT_HALF_X2(temp3, temp8, temp17, temp4) + "addq.ph %[temp1], %[temp1], %[temp2] \n\t" + "addq.ph %[temp6], %[temp6], %[temp2] \n\t" + ADD_SUB_HALVES(temp2, temp4, temp1, temp3) + ADD_SUB_HALVES(temp5, temp7, temp6, temp8) + MUL_SHIFT_SUM(temp1, temp3, temp6, temp8, temp9, temp13, temp17, temp18, + temp3, temp13, temp1, temp9, temp9, temp13, temp11, temp15, + temp6, temp17, temp8, temp18) + MUL_SHIFT_SUM(temp6, temp8, temp18, temp17, temp11, temp15, temp12, temp16, + temp8, temp15, temp6, temp11, temp12, temp16, temp10, temp14, + temp18, temp12, temp17, temp16) + INSERT_HALF_X2(temp1, temp3, temp9, temp13) + INSERT_HALF_X2(temp6, temp8, temp11, temp15) + SHIFT_R_SUM_X2(temp9, temp10, temp11, temp12, temp13, temp14, temp15, + temp16, temp2, temp4, temp5, temp7, temp3, temp1, temp8, + temp6) + PACK_2_HALVES_TO_WORD(temp1, temp2, temp3, temp4, temp9, temp12, temp13, + temp16, temp11, temp10, temp15, temp14) + LOAD_WITH_OFFSET_X4(temp10, temp11, temp14, temp15, ref, + 0, 0, 0, 0, + 0, 1, 2, 3, + BPS) + CONVERT_2_BYTES_TO_HALF(temp5, temp6, temp7, temp8, temp17, temp18, temp10, + temp11, temp10, temp11, temp14, temp15) + STORE_SAT_SUM_X2(temp5, temp6, temp7, temp8, temp17, temp18, temp10, temp11, + temp9, temp12, temp1, temp2, temp13, temp16, temp3, temp4, + dst, 0, 1, 2, 3, BPS) + + OUTPUT_EARLY_CLOBBER_REGS_18() + : [dst]"r"(dst), [in]"r"(in), [kC1]"r"(kC1), [kC2]"r"(kC2), [ref]"r"(ref) + : "memory", "hi", "lo" + ); +} + +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 int Disto4x4(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + int temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, temp9; + int temp10, temp11, temp12, temp13, temp14, temp15, temp16, temp17; + + __asm__ volatile ( + LOAD_WITH_OFFSET_X4(temp1, temp2, temp3, temp4, a, + 0, 0, 0, 0, + 0, 1, 2, 3, + BPS) + CONVERT_2_BYTES_TO_HALF(temp5, temp6, temp7, temp8, temp9,temp10, temp11, + temp12, temp1, temp2, temp3, temp4) + ADD_SUB_HALVES_X4(temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, + temp5, temp6, temp7, temp8, temp9, temp10, temp11, temp12) + PACK_2_HALVES_TO_WORD(temp9, temp10, temp11, temp12, temp1, temp3, temp5, + temp7, temp2, temp4, temp6, temp8) + ADD_SUB_HALVES_X4(temp2, temp4, temp6, temp8, temp9, temp1, temp3, temp10, + temp1, temp9, temp3, temp10, temp5, temp11, temp7, temp12) + ADD_SUB_HALVES_X4(temp5, temp11, temp7, temp2, temp9, temp3, temp6, temp12, + temp2, temp9, temp6, temp3, temp4, temp1, temp8, temp10) + ADD_SUB_HALVES_X4(temp1, temp4, temp10, temp8, temp7, temp11, temp5, temp2, + temp5, temp7, temp11, temp2, temp9, temp6, temp3, temp12) + ABS_X8(temp1, temp4, temp10, temp8, temp7, temp11, temp5, temp2) + LOAD_WITH_OFFSET_X4(temp3, temp6, temp9, temp12, w, + 0, 4, 8, 12, + 0, 0, 0, 0, + 0) + LOAD_WITH_OFFSET_X4(temp13, temp14, temp15, temp16, w, + 0, 4, 8, 12, + 1, 1, 1, 1, + 16) + MUL_HALF(temp17, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, + temp9, temp10, temp11, temp12, temp13, temp14, temp15, temp16) + LOAD_WITH_OFFSET_X4(temp1, temp2, temp3, temp4, b, + 0, 0, 0, 0, + 0, 1, 2, 3, + BPS) + CONVERT_2_BYTES_TO_HALF(temp5,temp6, temp7, temp8, temp9,temp10, temp11, + temp12, temp1, temp2, temp3, temp4) + ADD_SUB_HALVES_X4(temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, + temp5, temp6, temp7, temp8, temp9, temp10, temp11, temp12) + PACK_2_HALVES_TO_WORD(temp9, temp10, temp11, temp12, temp1, temp3, temp5, + temp7, temp2, temp4, temp6, temp8) + ADD_SUB_HALVES_X4(temp2, temp4, temp6, temp8, temp9, temp1, temp3, temp10, + temp1, temp9, temp3, temp10, temp5, temp11, temp7, temp12) + ADD_SUB_HALVES_X4(temp5, temp11, temp7, temp2, temp9, temp3, temp6, temp12, + temp2, temp9, temp6, temp3, temp4, temp1, temp8, temp10) + ADD_SUB_HALVES_X4(temp1, temp4, temp10, temp8, temp7, temp11, temp5, temp2, + temp5, temp7, temp11, temp2, temp9, temp6, temp3, temp12) + ABS_X8(temp1, temp4, temp10, temp8, temp7, temp11, temp5, temp2) + LOAD_WITH_OFFSET_X4(temp3, temp6, temp9, temp12, w, + 0, 4, 8, 12, + 0, 0, 0, 0, + 0) + LOAD_WITH_OFFSET_X4(temp13, temp14, temp15, temp16, w, + 0, 4, 8, 12, + 1, 1, 1, 1, + 16) + MUL_HALF(temp3, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, + temp9, temp10, temp11, temp12, temp13, temp14, temp15, temp16) + OUTPUT_EARLY_CLOBBER_REGS_17() + : [a]"r"(a), [b]"r"(b), [w]"r"(w) + : "memory", "hi", "lo" + ); + return abs(temp3 - temp17) >> 5; +} + +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; +} + +//------------------------------------------------------------------------------ +// Intra predictions + +#define FILL_PART(J, SIZE) \ + "usw %[value], 0+" #J "*" XSTR(BPS) "(%[dst]) \n\t" \ + "usw %[value], 4+" #J "*" XSTR(BPS) "(%[dst]) \n\t" \ + ".if " #SIZE " == 16 \n\t" \ + "usw %[value], 8+" #J "*" XSTR(BPS) "(%[dst]) \n\t" \ + "usw %[value], 12+" #J "*" XSTR(BPS) "(%[dst]) \n\t" \ + ".endif \n\t" + +#define FILL_8_OR_16(DST, VALUE, SIZE) do { \ + int value = (VALUE); \ + __asm__ volatile ( \ + "replv.qb %[value], %[value] \n\t" \ + FILL_PART( 0, SIZE) \ + FILL_PART( 1, SIZE) \ + FILL_PART( 2, SIZE) \ + FILL_PART( 3, SIZE) \ + FILL_PART( 4, SIZE) \ + FILL_PART( 5, SIZE) \ + FILL_PART( 6, SIZE) \ + FILL_PART( 7, SIZE) \ + ".if " #SIZE " == 16 \n\t" \ + FILL_PART( 8, 16) \ + FILL_PART( 9, 16) \ + FILL_PART(10, 16) \ + FILL_PART(11, 16) \ + FILL_PART(12, 16) \ + FILL_PART(13, 16) \ + FILL_PART(14, 16) \ + FILL_PART(15, 16) \ + ".endif \n\t" \ + : [value]"+&r"(value) \ + : [dst]"r"((DST)) \ + : "memory" \ + ); \ +} while (0) + +#define VERTICAL_PRED(DST, TOP, SIZE) \ +static WEBP_INLINE void VerticalPred##SIZE(uint8_t* (DST), \ + const uint8_t* (TOP)) { \ + int j; \ + if ((TOP)) { \ + for (j = 0; j < (SIZE); ++j) memcpy((DST) + j * BPS, (TOP), (SIZE)); \ + } else { \ + FILL_8_OR_16((DST), 127, (SIZE)); \ + } \ +} + +VERTICAL_PRED(dst, top, 8) +VERTICAL_PRED(dst, top, 16) + +#undef VERTICAL_PRED + +#define HORIZONTAL_PRED(DST, LEFT, SIZE) \ +static WEBP_INLINE void HorizontalPred##SIZE(uint8_t* (DST), \ + const uint8_t* (LEFT)) { \ + if (LEFT) { \ + int j; \ + for (j = 0; j < (SIZE); ++j) { \ + memset((DST) + j * BPS, (LEFT)[j], (SIZE)); \ + } \ + } else { \ + FILL_8_OR_16((DST), 129, (SIZE)); \ + } \ +} + +HORIZONTAL_PRED(dst, left, 8) +HORIZONTAL_PRED(dst, left, 16) + +#undef HORIZONTAL_PRED + +#define CLIPPING() \ + "preceu.ph.qbl %[temp2], %[temp0] \n\t" \ + "preceu.ph.qbr %[temp0], %[temp0] \n\t" \ + "preceu.ph.qbl %[temp3], %[temp1] \n\t" \ + "preceu.ph.qbr %[temp1], %[temp1] \n\t" \ + "addu.ph %[temp2], %[temp2], %[leftY_1] \n\t" \ + "addu.ph %[temp0], %[temp0], %[leftY_1] \n\t" \ + "addu.ph %[temp3], %[temp3], %[leftY_1] \n\t" \ + "addu.ph %[temp1], %[temp1], %[leftY_1] \n\t" \ + "shll_s.ph %[temp2], %[temp2], 7 \n\t" \ + "shll_s.ph %[temp0], %[temp0], 7 \n\t" \ + "shll_s.ph %[temp3], %[temp3], 7 \n\t" \ + "shll_s.ph %[temp1], %[temp1], 7 \n\t" \ + "precrqu_s.qb.ph %[temp0], %[temp2], %[temp0] \n\t" \ + "precrqu_s.qb.ph %[temp1], %[temp3], %[temp1] \n\t" + +#define CLIP_8B_TO_DST(DST, LEFT, TOP, SIZE) do { \ + int leftY_1 = ((int)(LEFT)[y] << 16) + (LEFT)[y]; \ + int temp0, temp1, temp2, temp3; \ + __asm__ volatile ( \ + "replv.ph %[leftY_1], %[leftY_1] \n\t" \ + "ulw %[temp0], 0(%[top]) \n\t" \ + "ulw %[temp1], 4(%[top]) \n\t" \ + "subu.ph %[leftY_1], %[leftY_1], %[left_1] \n\t" \ + CLIPPING() \ + "usw %[temp0], 0(%[dst]) \n\t" \ + "usw %[temp1], 4(%[dst]) \n\t" \ + ".if " #SIZE " == 16 \n\t" \ + "ulw %[temp0], 8(%[top]) \n\t" \ + "ulw %[temp1], 12(%[top]) \n\t" \ + CLIPPING() \ + "usw %[temp0], 8(%[dst]) \n\t" \ + "usw %[temp1], 12(%[dst]) \n\t" \ + ".endif \n\t" \ + : [leftY_1]"+&r"(leftY_1), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), \ + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3) \ + : [left_1]"r"(left_1), [top]"r"((TOP)), [dst]"r"((DST)) \ + : "memory" \ + ); \ +} while (0) + +#define CLIP_TO_DST(DST, LEFT, TOP, SIZE) do { \ + int y; \ + const int left_1 = ((int)(LEFT)[-1] << 16) + (LEFT)[-1]; \ + for (y = 0; y < (SIZE); ++y) { \ + CLIP_8B_TO_DST((DST), (LEFT), (TOP), (SIZE)); \ + (DST) += BPS; \ + } \ +} while (0) + +#define TRUE_MOTION(DST, LEFT, TOP, SIZE) \ +static WEBP_INLINE void TrueMotion##SIZE(uint8_t* (DST), const uint8_t* (LEFT),\ + const uint8_t* (TOP)) { \ + if ((LEFT) != NULL) { \ + if ((TOP) != NULL) { \ + CLIP_TO_DST((DST), (LEFT), (TOP), (SIZE)); \ + } else { \ + HorizontalPred##SIZE((DST), (LEFT)); \ + } \ + } 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##SIZE((DST), (TOP)); \ + } else { \ + FILL_8_OR_16((DST), 129, (SIZE)); \ + } \ + } \ +} + +TRUE_MOTION(dst, left, top, 8) +TRUE_MOTION(dst, left, top, 16) + +#undef TRUE_MOTION +#undef CLIP_TO_DST +#undef CLIP_8B_TO_DST +#undef CLIPPING + +static WEBP_INLINE void DCMode16(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + int DC, DC1; + int temp0, temp1, temp2, temp3; + + __asm__ volatile( + "beqz %[top], 2f \n\t" + LOAD_WITH_OFFSET_X4(temp0, temp1, temp2, temp3, top, + 0, 4, 8, 12, + 0, 0, 0, 0, + 0) + "raddu.w.qb %[temp0], %[temp0] \n\t" + "raddu.w.qb %[temp1], %[temp1] \n\t" + "raddu.w.qb %[temp2], %[temp2] \n\t" + "raddu.w.qb %[temp3], %[temp3] \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "addu %[temp2], %[temp2], %[temp3] \n\t" + "addu %[DC], %[temp0], %[temp2] \n\t" + "move %[DC1], %[DC] \n\t" + "beqz %[left], 1f \n\t" + LOAD_WITH_OFFSET_X4(temp0, temp1, temp2, temp3, left, + 0, 4, 8, 12, + 0, 0, 0, 0, + 0) + "raddu.w.qb %[temp0], %[temp0] \n\t" + "raddu.w.qb %[temp1], %[temp1] \n\t" + "raddu.w.qb %[temp2], %[temp2] \n\t" + "raddu.w.qb %[temp3], %[temp3] \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "addu %[temp2], %[temp2], %[temp3] \n\t" + "addu %[DC1], %[temp0], %[temp2] \n\t" + "1: \n\t" + "addu %[DC], %[DC], %[DC1] \n\t" + "j 3f \n\t" + "2: \n\t" + "beqz %[left], 4f \n\t" + LOAD_WITH_OFFSET_X4(temp0, temp1, temp2, temp3, left, + 0, 4, 8, 12, + 0, 0, 0, 0, + 0) + "raddu.w.qb %[temp0], %[temp0] \n\t" + "raddu.w.qb %[temp1], %[temp1] \n\t" + "raddu.w.qb %[temp2], %[temp2] \n\t" + "raddu.w.qb %[temp3], %[temp3] \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "addu %[temp2], %[temp2], %[temp3] \n\t" + "addu %[DC], %[temp0], %[temp2] \n\t" + "addu %[DC], %[DC], %[DC] \n\t" + "3: \n\t" + "shra_r.w %[DC], %[DC], 5 \n\t" + "j 5f \n\t" + "4: \n\t" + "li %[DC], 0x80 \n\t" + "5: \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [DC]"=&r"(DC), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [DC1]"=&r"(DC1) + : [left]"r"(left), [top]"r"(top) + : "memory" + ); + + FILL_8_OR_16(dst, DC, 16); +} + +static WEBP_INLINE void DCMode8(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + int DC, DC1; + int temp0, temp1, temp2, temp3; + + __asm__ volatile( + "beqz %[top], 2f \n\t" + "ulw %[temp0], 0(%[top]) \n\t" + "ulw %[temp1], 4(%[top]) \n\t" + "raddu.w.qb %[temp0], %[temp0] \n\t" + "raddu.w.qb %[temp1], %[temp1] \n\t" + "addu %[DC], %[temp0], %[temp1] \n\t" + "move %[DC1], %[DC] \n\t" + "beqz %[left], 1f \n\t" + "ulw %[temp2], 0(%[left]) \n\t" + "ulw %[temp3], 4(%[left]) \n\t" + "raddu.w.qb %[temp2], %[temp2] \n\t" + "raddu.w.qb %[temp3], %[temp3] \n\t" + "addu %[DC1], %[temp2], %[temp3] \n\t" + "1: \n\t" + "addu %[DC], %[DC], %[DC1] \n\t" + "j 3f \n\t" + "2: \n\t" + "beqz %[left], 4f \n\t" + "ulw %[temp2], 0(%[left]) \n\t" + "ulw %[temp3], 4(%[left]) \n\t" + "raddu.w.qb %[temp2], %[temp2] \n\t" + "raddu.w.qb %[temp3], %[temp3] \n\t" + "addu %[DC], %[temp2], %[temp3] \n\t" + "addu %[DC], %[DC], %[DC] \n\t" + "3: \n\t" + "shra_r.w %[DC], %[DC], 4 \n\t" + "j 5f \n\t" + "4: \n\t" + "li %[DC], 0x80 \n\t" + "5: \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [DC]"=&r"(DC), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [DC1]"=&r"(DC1) + : [left]"r"(left), [top]"r"(top) + : "memory" + ); + + FILL_8_OR_16(dst, DC, 8); +} + +static void DC4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1; + __asm__ volatile( + "ulw %[temp0], 0(%[top]) \n\t" + "ulw %[temp1], -5(%[top]) \n\t" + "raddu.w.qb %[temp0], %[temp0] \n\t" + "raddu.w.qb %[temp1], %[temp1] \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "addiu %[temp0], %[temp0], 4 \n\t" + "srl %[temp0], %[temp0], 3 \n\t" + "replv.qb %[temp0], %[temp0] \n\t" + "usw %[temp0], 0*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp0], 1*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp0], 2*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp0], 3*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void TM4(uint8_t* dst, const uint8_t* top) { + int a10, a32, temp0, temp1, temp2, temp3, temp4, temp5; + const int c35 = 0xff00ff; + __asm__ volatile ( + "lbu %[temp1], 0(%[top]) \n\t" + "lbu %[a10], 1(%[top]) \n\t" + "lbu %[temp2], 2(%[top]) \n\t" + "lbu %[a32], 3(%[top]) \n\t" + "ulw %[temp0], -5(%[top]) \n\t" + "lbu %[temp4], -1(%[top]) \n\t" + "append %[a10], %[temp1], 16 \n\t" + "append %[a32], %[temp2], 16 \n\t" + "replv.ph %[temp4], %[temp4] \n\t" + "shrl.ph %[temp1], %[temp0], 8 \n\t" + "and %[temp0], %[temp0], %[c35] \n\t" + "subu.ph %[temp1], %[temp1], %[temp4] \n\t" + "subu.ph %[temp0], %[temp0], %[temp4] \n\t" + "srl %[temp2], %[temp1], 16 \n\t" + "srl %[temp3], %[temp0], 16 \n\t" + "replv.ph %[temp2], %[temp2] \n\t" + "replv.ph %[temp3], %[temp3] \n\t" + "replv.ph %[temp4], %[temp1] \n\t" + "replv.ph %[temp5], %[temp0] \n\t" + "addu.ph %[temp0], %[temp3], %[a10] \n\t" + "addu.ph %[temp1], %[temp3], %[a32] \n\t" + "addu.ph %[temp3], %[temp2], %[a10] \n\t" + "addu.ph %[temp2], %[temp2], %[a32] \n\t" + "shll_s.ph %[temp0], %[temp0], 7 \n\t" + "shll_s.ph %[temp1], %[temp1], 7 \n\t" + "shll_s.ph %[temp3], %[temp3], 7 \n\t" + "shll_s.ph %[temp2], %[temp2], 7 \n\t" + "precrqu_s.qb.ph %[temp0], %[temp1], %[temp0] \n\t" + "precrqu_s.qb.ph %[temp1], %[temp2], %[temp3] \n\t" + "addu.ph %[temp2], %[temp5], %[a10] \n\t" + "addu.ph %[temp3], %[temp5], %[a32] \n\t" + "addu.ph %[temp5], %[temp4], %[a10] \n\t" + "addu.ph %[temp4], %[temp4], %[a32] \n\t" + "shll_s.ph %[temp2], %[temp2], 7 \n\t" + "shll_s.ph %[temp3], %[temp3], 7 \n\t" + "shll_s.ph %[temp4], %[temp4], 7 \n\t" + "shll_s.ph %[temp5], %[temp5], 7 \n\t" + "precrqu_s.qb.ph %[temp2], %[temp3], %[temp2] \n\t" + "precrqu_s.qb.ph %[temp3], %[temp4], %[temp5] \n\t" + "usw %[temp1], 0*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp0], 1*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp3], 2*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp2], 3*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [a10]"=&r"(a10), [a32]"=&r"(a32) + : [c35]"r"(c35), [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void VE4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1, temp2, temp3, temp4, temp5, temp6; + __asm__ volatile( + "ulw %[temp0], -1(%[top]) \n\t" + "ulh %[temp1], 3(%[top]) \n\t" + "preceu.ph.qbr %[temp2], %[temp0] \n\t" + "preceu.ph.qbl %[temp3], %[temp0] \n\t" + "preceu.ph.qbr %[temp4], %[temp1] \n\t" + "packrl.ph %[temp5], %[temp3], %[temp2] \n\t" + "packrl.ph %[temp6], %[temp4], %[temp3] \n\t" + "shll.ph %[temp5], %[temp5], 1 \n\t" + "shll.ph %[temp6], %[temp6], 1 \n\t" + "addq.ph %[temp2], %[temp5], %[temp2] \n\t" + "addq.ph %[temp6], %[temp6], %[temp4] \n\t" + "addq.ph %[temp2], %[temp2], %[temp3] \n\t" + "addq.ph %[temp6], %[temp6], %[temp3] \n\t" + "shra_r.ph %[temp2], %[temp2], 2 \n\t" + "shra_r.ph %[temp6], %[temp6], 2 \n\t" + "precr.qb.ph %[temp4], %[temp6], %[temp2] \n\t" + "usw %[temp4], 0*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp4], 1*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp4], 2*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp4], 3*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void HE4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1, temp2, temp3, temp4, temp5, temp6; + __asm__ volatile( + "ulw %[temp0], -4(%[top]) \n\t" + "lbu %[temp1], -5(%[top]) \n\t" + "preceu.ph.qbr %[temp2], %[temp0] \n\t" + "preceu.ph.qbl %[temp3], %[temp0] \n\t" + "replv.ph %[temp4], %[temp1] \n\t" + "packrl.ph %[temp5], %[temp3], %[temp2] \n\t" + "packrl.ph %[temp6], %[temp2], %[temp4] \n\t" + "shll.ph %[temp5], %[temp5], 1 \n\t" + "shll.ph %[temp6], %[temp6], 1 \n\t" + "addq.ph %[temp3], %[temp3], %[temp5] \n\t" + "addq.ph %[temp3], %[temp3], %[temp2] \n\t" + "addq.ph %[temp2], %[temp2], %[temp6] \n\t" + "addq.ph %[temp2], %[temp2], %[temp4] \n\t" + "shra_r.ph %[temp3], %[temp3], 2 \n\t" + "shra_r.ph %[temp2], %[temp2], 2 \n\t" + "replv.qb %[temp0], %[temp3] \n\t" + "replv.qb %[temp1], %[temp2] \n\t" + "srl %[temp3], %[temp3], 16 \n\t" + "srl %[temp2], %[temp2], 16 \n\t" + "replv.qb %[temp3], %[temp3] \n\t" + "replv.qb %[temp2], %[temp2] \n\t" + "usw %[temp3], 0*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp0], 1*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp2], 2*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp1], 3*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void RD4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1, temp2, temp3, temp4, temp5; + int temp6, temp7, temp8, temp9, temp10, temp11; + __asm__ volatile( + "ulw %[temp0], -5(%[top]) \n\t" + "ulw %[temp1], -1(%[top]) \n\t" + "preceu.ph.qbl %[temp2], %[temp0] \n\t" + "preceu.ph.qbr %[temp3], %[temp0] \n\t" + "preceu.ph.qbr %[temp4], %[temp1] \n\t" + "preceu.ph.qbl %[temp5], %[temp1] \n\t" + "packrl.ph %[temp6], %[temp2], %[temp3] \n\t" + "packrl.ph %[temp7], %[temp4], %[temp2] \n\t" + "packrl.ph %[temp8], %[temp5], %[temp4] \n\t" + "shll.ph %[temp6], %[temp6], 1 \n\t" + "addq.ph %[temp9], %[temp2], %[temp6] \n\t" + "shll.ph %[temp7], %[temp7], 1 \n\t" + "addq.ph %[temp9], %[temp9], %[temp3] \n\t" + "shll.ph %[temp8], %[temp8], 1 \n\t" + "shra_r.ph %[temp9], %[temp9], 2 \n\t" + "addq.ph %[temp10], %[temp4], %[temp7] \n\t" + "addq.ph %[temp11], %[temp5], %[temp8] \n\t" + "addq.ph %[temp10], %[temp10], %[temp2] \n\t" + "addq.ph %[temp11], %[temp11], %[temp4] \n\t" + "shra_r.ph %[temp10], %[temp10], 2 \n\t" + "shra_r.ph %[temp11], %[temp11], 2 \n\t" + "lbu %[temp0], 3(%[top]) \n\t" + "lbu %[temp1], 2(%[top]) \n\t" + "lbu %[temp2], 1(%[top]) \n\t" + "sll %[temp1], %[temp1], 1 \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "addu %[temp0], %[temp0], %[temp2] \n\t" + "precr.qb.ph %[temp9], %[temp10], %[temp9] \n\t" + "shra_r.w %[temp0], %[temp0], 2 \n\t" + "precr.qb.ph %[temp10], %[temp11], %[temp10] \n\t" + "usw %[temp9], 3*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp10], 1*" XSTR(BPS) "(%[dst]) \n\t" + "prepend %[temp9], %[temp11], 8 \n\t" + "prepend %[temp10], %[temp0], 8 \n\t" + "usw %[temp9], 2*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp10], 0*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), [temp11]"=&r"(temp11) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void VR4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8, temp9; + __asm__ volatile ( + "ulw %[temp0], -4(%[top]) \n\t" + "ulw %[temp1], 0(%[top]) \n\t" + "preceu.ph.qbl %[temp2], %[temp0] \n\t" + "preceu.ph.qbr %[temp0], %[temp0] \n\t" + "preceu.ph.qbla %[temp3], %[temp1] \n\t" + "preceu.ph.qbra %[temp1], %[temp1] \n\t" + "packrl.ph %[temp7], %[temp3], %[temp2] \n\t" + "addqh_r.ph %[temp4], %[temp1], %[temp3] \n\t" + "move %[temp6], %[temp1] \n\t" + "append %[temp1], %[temp2], 16 \n\t" + "shll.ph %[temp9], %[temp6], 1 \n\t" + "addqh_r.ph %[temp5], %[temp7], %[temp6] \n\t" + "shll.ph %[temp8], %[temp7], 1 \n\t" + "addu.ph %[temp3], %[temp7], %[temp3] \n\t" + "addu.ph %[temp1], %[temp1], %[temp6] \n\t" + "packrl.ph %[temp7], %[temp2], %[temp0] \n\t" + "addu.ph %[temp6], %[temp0], %[temp2] \n\t" + "addu.ph %[temp3], %[temp3], %[temp9] \n\t" + "addu.ph %[temp1], %[temp1], %[temp8] \n\t" + "shll.ph %[temp7], %[temp7], 1 \n\t" + "shra_r.ph %[temp3], %[temp3], 2 \n\t" + "shra_r.ph %[temp1], %[temp1], 2 \n\t" + "addu.ph %[temp6], %[temp6], %[temp7] \n\t" + "shra_r.ph %[temp6], %[temp6], 2 \n\t" + "precrq.ph.w %[temp8], %[temp4], %[temp5] \n\t" + "append %[temp4], %[temp5], 16 \n\t" + "precrq.ph.w %[temp2], %[temp3], %[temp1] \n\t" + "append %[temp3], %[temp1], 16 \n\t" + "precr.qb.ph %[temp8], %[temp8], %[temp4] \n\t" + "precr.qb.ph %[temp3], %[temp2], %[temp3] \n\t" + "usw %[temp8], 0*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp3], 1*" XSTR(BPS) "(%[dst]) \n\t" + "append %[temp3], %[temp6], 8 \n\t" + "srl %[temp6], %[temp6], 16 \n\t" + "append %[temp8], %[temp6], 8 \n\t" + "usw %[temp3], 3*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp8], 2*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void LD4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1, temp2, temp3, temp4, temp5; + int temp6, temp7, temp8, temp9, temp10, temp11; + __asm__ volatile( + "ulw %[temp0], 0(%[top]) \n\t" + "ulw %[temp1], 4(%[top]) \n\t" + "preceu.ph.qbl %[temp2], %[temp0] \n\t" + "preceu.ph.qbr %[temp3], %[temp0] \n\t" + "preceu.ph.qbr %[temp4], %[temp1] \n\t" + "preceu.ph.qbl %[temp5], %[temp1] \n\t" + "packrl.ph %[temp6], %[temp2], %[temp3] \n\t" + "packrl.ph %[temp7], %[temp4], %[temp2] \n\t" + "packrl.ph %[temp8], %[temp5], %[temp4] \n\t" + "shll.ph %[temp6], %[temp6], 1 \n\t" + "addq.ph %[temp9], %[temp2], %[temp6] \n\t" + "shll.ph %[temp7], %[temp7], 1 \n\t" + "addq.ph %[temp9], %[temp9], %[temp3] \n\t" + "shll.ph %[temp8], %[temp8], 1 \n\t" + "shra_r.ph %[temp9], %[temp9], 2 \n\t" + "addq.ph %[temp10], %[temp4], %[temp7] \n\t" + "addq.ph %[temp11], %[temp5], %[temp8] \n\t" + "addq.ph %[temp10], %[temp10], %[temp2] \n\t" + "addq.ph %[temp11], %[temp11], %[temp4] \n\t" + "shra_r.ph %[temp10], %[temp10], 2 \n\t" + "shra_r.ph %[temp11], %[temp11], 2 \n\t" + "srl %[temp1], %[temp1], 24 \n\t" + "sll %[temp1], %[temp1], 1 \n\t" + "raddu.w.qb %[temp5], %[temp5] \n\t" + "precr.qb.ph %[temp9], %[temp10], %[temp9] \n\t" + "precr.qb.ph %[temp10], %[temp11], %[temp10] \n\t" + "addu %[temp1], %[temp1], %[temp5] \n\t" + "shra_r.w %[temp1], %[temp1], 2 \n\t" + "usw %[temp9], 0*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp10], 2*" XSTR(BPS) "(%[dst]) \n\t" + "prepend %[temp9], %[temp11], 8 \n\t" + "prepend %[temp10], %[temp1], 8 \n\t" + "usw %[temp9], 1*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp10], 3*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), [temp11]"=&r"(temp11) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void VL4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8, temp9; + __asm__ volatile ( + "ulw %[temp0], 0(%[top]) \n\t" + "ulw %[temp1], 4(%[top]) \n\t" + "preceu.ph.qbla %[temp2], %[temp0] \n\t" + "preceu.ph.qbra %[temp0], %[temp0] \n\t" + "preceu.ph.qbl %[temp3], %[temp1] \n\t" + "preceu.ph.qbr %[temp1], %[temp1] \n\t" + "addqh_r.ph %[temp4], %[temp0], %[temp2] \n\t" + "packrl.ph %[temp7], %[temp1], %[temp0] \n\t" + "precrq.ph.w %[temp6], %[temp1], %[temp2] \n\t" + "shll.ph %[temp9], %[temp2], 1 \n\t" + "addqh_r.ph %[temp5], %[temp7], %[temp2] \n\t" + "shll.ph %[temp8], %[temp7], 1 \n\t" + "addu.ph %[temp2], %[temp2], %[temp6] \n\t" + "addu.ph %[temp0], %[temp0], %[temp7] \n\t" + "packrl.ph %[temp7], %[temp3], %[temp1] \n\t" + "addu.ph %[temp6], %[temp1], %[temp3] \n\t" + "addu.ph %[temp2], %[temp2], %[temp8] \n\t" + "addu.ph %[temp0], %[temp0], %[temp9] \n\t" + "shll.ph %[temp7], %[temp7], 1 \n\t" + "shra_r.ph %[temp2], %[temp2], 2 \n\t" + "shra_r.ph %[temp0], %[temp0], 2 \n\t" + "addu.ph %[temp6], %[temp6], %[temp7] \n\t" + "shra_r.ph %[temp6], %[temp6], 2 \n\t" + "precrq.ph.w %[temp8], %[temp5], %[temp4] \n\t" + "append %[temp5], %[temp4], 16 \n\t" + "precrq.ph.w %[temp3], %[temp2], %[temp0] \n\t" + "append %[temp2], %[temp0], 16 \n\t" + "precr.qb.ph %[temp8], %[temp8], %[temp5] \n\t" + "precr.qb.ph %[temp3], %[temp3], %[temp2] \n\t" + "usw %[temp8], 0*" XSTR(BPS) "(%[dst]) \n\t" + "prepend %[temp8], %[temp6], 8 \n\t" + "usw %[temp3], 1*" XSTR(BPS) "(%[dst]) \n\t" + "srl %[temp6], %[temp6], 16 \n\t" + "prepend %[temp3], %[temp6], 8 \n\t" + "usw %[temp8], 2*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp3], 3*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void HD4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8, temp9; + __asm__ volatile ( + "ulw %[temp0], -5(%[top]) \n\t" + "ulw %[temp1], -1(%[top]) \n\t" + "preceu.ph.qbla %[temp2], %[temp0] \n\t" + "preceu.ph.qbra %[temp0], %[temp0] \n\t" + "preceu.ph.qbl %[temp3], %[temp1] \n\t" + "preceu.ph.qbr %[temp1], %[temp1] \n\t" + "addqh_r.ph %[temp4], %[temp0], %[temp2] \n\t" + "packrl.ph %[temp7], %[temp1], %[temp0] \n\t" + "precrq.ph.w %[temp6], %[temp1], %[temp2] \n\t" + "shll.ph %[temp9], %[temp2], 1 \n\t" + "addqh_r.ph %[temp5], %[temp7], %[temp2] \n\t" + "shll.ph %[temp8], %[temp7], 1 \n\t" + "addu.ph %[temp2], %[temp2], %[temp6] \n\t" + "addu.ph %[temp0], %[temp0], %[temp7] \n\t" + "packrl.ph %[temp7], %[temp3], %[temp1] \n\t" + "addu.ph %[temp6], %[temp1], %[temp3] \n\t" + "addu.ph %[temp2], %[temp2], %[temp8] \n\t" + "addu.ph %[temp0], %[temp0], %[temp9] \n\t" + "shll.ph %[temp7], %[temp7], 1 \n\t" + "shra_r.ph %[temp2], %[temp2], 2 \n\t" + "shra_r.ph %[temp0], %[temp0], 2 \n\t" + "addu.ph %[temp6], %[temp6], %[temp7] \n\t" + "shra_r.ph %[temp6], %[temp6], 2 \n\t" + "precrq.ph.w %[temp1], %[temp2], %[temp5] \n\t" + "precrq.ph.w %[temp3], %[temp0], %[temp4] \n\t" + "precr.qb.ph %[temp7], %[temp6], %[temp1] \n\t" + "precr.qb.ph %[temp6], %[temp1], %[temp3] \n\t" + "usw %[temp7], 0*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp6], 1*" XSTR(BPS) "(%[dst]) \n\t" + "append %[temp2], %[temp5], 16 \n\t" + "append %[temp0], %[temp4], 16 \n\t" + "precr.qb.ph %[temp5], %[temp3], %[temp2] \n\t" + "precr.qb.ph %[temp4], %[temp2], %[temp0] \n\t" + "usw %[temp5], 2*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp4], 3*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +static void HU4(uint8_t* dst, const uint8_t* top) { + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; + __asm__ volatile ( + "ulw %[temp0], -5(%[top]) \n\t" + "preceu.ph.qbl %[temp1], %[temp0] \n\t" + "preceu.ph.qbr %[temp2], %[temp0] \n\t" + "packrl.ph %[temp3], %[temp1], %[temp2] \n\t" + "replv.qb %[temp7], %[temp2] \n\t" + "addqh_r.ph %[temp4], %[temp1], %[temp3] \n\t" + "addqh_r.ph %[temp5], %[temp3], %[temp2] \n\t" + "shll.ph %[temp6], %[temp3], 1 \n\t" + "addu.ph %[temp3], %[temp2], %[temp3] \n\t" + "addu.ph %[temp6], %[temp1], %[temp6] \n\t" + "shll.ph %[temp0], %[temp2], 1 \n\t" + "addu.ph %[temp6], %[temp6], %[temp2] \n\t" + "addu.ph %[temp0], %[temp3], %[temp0] \n\t" + "shra_r.ph %[temp6], %[temp6], 2 \n\t" + "shra_r.ph %[temp0], %[temp0], 2 \n\t" + "packrl.ph %[temp3], %[temp6], %[temp5] \n\t" + "precrq.ph.w %[temp2], %[temp6], %[temp4] \n\t" + "append %[temp0], %[temp5], 16 \n\t" + "precr.qb.ph %[temp3], %[temp3], %[temp2] \n\t" + "usw %[temp3], 0*" XSTR(BPS) "(%[dst]) \n\t" + "precr.qb.ph %[temp1], %[temp7], %[temp0] \n\t" + "usw %[temp7], 3*" XSTR(BPS) "(%[dst]) \n\t" + "packrl.ph %[temp2], %[temp1], %[temp3] \n\t" + "usw %[temp1], 2*" XSTR(BPS) "(%[dst]) \n\t" + "usw %[temp2], 1*" XSTR(BPS) "(%[dst]) \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7) + : [top]"r"(top), [dst]"r"(dst) + : "memory" + ); +} + +//------------------------------------------------------------------------------ +// Chroma 8x8 prediction (paragraph 12.2) + +static void IntraChromaPreds(uint8_t* dst, const uint8_t* left, + const uint8_t* top) { + // U block + DCMode8(C8DC8 + dst, left, top); + VerticalPred8(C8VE8 + dst, top); + HorizontalPred8(C8HE8 + dst, left); + TrueMotion8(C8TM8 + dst, left, top); + // V block + dst += 8; + if (top) top += 8; + if (left) left += 16; + DCMode8(C8DC8 + dst, left, top); + VerticalPred8(C8VE8 + dst, top); + HorizontalPred8(C8HE8 + dst, left); + TrueMotion8(C8TM8 + dst, left, top); +} + +//------------------------------------------------------------------------------ +// luma 16x16 prediction (paragraph 12.3) + +static void Intra16Preds(uint8_t* dst, + const uint8_t* left, const uint8_t* top) { + DCMode16(I16DC16 + dst, left, top); + VerticalPred16(I16VE16 + dst, top); + HorizontalPred16(I16HE16 + dst, left); + TrueMotion16(I16TM16 + dst, left, top); +} + +// 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 + +#if !defined(WORK_AROUND_GCC) + +#define GET_SSE_INNER(A) \ + "lw %[temp0], " #A "(%[a]) \n\t" \ + "lw %[temp1], " #A "(%[b]) \n\t" \ + "preceu.ph.qbr %[temp2], %[temp0] \n\t" \ + "preceu.ph.qbl %[temp0], %[temp0] \n\t" \ + "preceu.ph.qbr %[temp3], %[temp1] \n\t" \ + "preceu.ph.qbl %[temp1], %[temp1] \n\t" \ + "subq.ph %[temp2], %[temp2], %[temp3] \n\t" \ + "subq.ph %[temp0], %[temp0], %[temp1] \n\t" \ + "dpa.w.ph $ac0, %[temp2], %[temp2] \n\t" \ + "dpa.w.ph $ac0, %[temp0], %[temp0] \n\t" + +#define GET_SSE(A, B, C, D) \ + GET_SSE_INNER(A) \ + GET_SSE_INNER(B) \ + GET_SSE_INNER(C) \ + GET_SSE_INNER(D) + +static int SSE16x16(const uint8_t* a, const uint8_t* b) { + int count; + int temp0, temp1, temp2, temp3; + __asm__ volatile ( + "mult $zero, $zero \n\t" + GET_SSE( 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS) + GET_SSE( 1 * BPS, 4 + 1 * BPS, 8 + 1 * BPS, 12 + 1 * BPS) + GET_SSE( 2 * BPS, 4 + 2 * BPS, 8 + 2 * BPS, 12 + 2 * BPS) + GET_SSE( 3 * BPS, 4 + 3 * BPS, 8 + 3 * BPS, 12 + 3 * BPS) + GET_SSE( 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS) + GET_SSE( 5 * BPS, 4 + 5 * BPS, 8 + 5 * BPS, 12 + 5 * BPS) + GET_SSE( 6 * BPS, 4 + 6 * BPS, 8 + 6 * BPS, 12 + 6 * BPS) + GET_SSE( 7 * BPS, 4 + 7 * BPS, 8 + 7 * BPS, 12 + 7 * BPS) + GET_SSE( 8 * BPS, 4 + 8 * BPS, 8 + 8 * BPS, 12 + 8 * BPS) + GET_SSE( 9 * BPS, 4 + 9 * BPS, 8 + 9 * BPS, 12 + 9 * BPS) + GET_SSE(10 * BPS, 4 + 10 * BPS, 8 + 10 * BPS, 12 + 10 * BPS) + GET_SSE(11 * BPS, 4 + 11 * BPS, 8 + 11 * BPS, 12 + 11 * BPS) + GET_SSE(12 * BPS, 4 + 12 * BPS, 8 + 12 * BPS, 12 + 12 * BPS) + GET_SSE(13 * BPS, 4 + 13 * BPS, 8 + 13 * BPS, 12 + 13 * BPS) + GET_SSE(14 * BPS, 4 + 14 * BPS, 8 + 14 * BPS, 12 + 14 * BPS) + GET_SSE(15 * BPS, 4 + 15 * BPS, 8 + 15 * BPS, 12 + 15 * BPS) + "mflo %[count] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [count]"=&r"(count) + : [a]"r"(a), [b]"r"(b) + : "memory", "hi", "lo" + ); + return count; +} + +static int SSE16x8(const uint8_t* a, const uint8_t* b) { + int count; + int temp0, temp1, temp2, temp3; + __asm__ volatile ( + "mult $zero, $zero \n\t" + GET_SSE( 0 * BPS, 4 + 0 * BPS, 8 + 0 * BPS, 12 + 0 * BPS) + GET_SSE( 1 * BPS, 4 + 1 * BPS, 8 + 1 * BPS, 12 + 1 * BPS) + GET_SSE( 2 * BPS, 4 + 2 * BPS, 8 + 2 * BPS, 12 + 2 * BPS) + GET_SSE( 3 * BPS, 4 + 3 * BPS, 8 + 3 * BPS, 12 + 3 * BPS) + GET_SSE( 4 * BPS, 4 + 4 * BPS, 8 + 4 * BPS, 12 + 4 * BPS) + GET_SSE( 5 * BPS, 4 + 5 * BPS, 8 + 5 * BPS, 12 + 5 * BPS) + GET_SSE( 6 * BPS, 4 + 6 * BPS, 8 + 6 * BPS, 12 + 6 * BPS) + GET_SSE( 7 * BPS, 4 + 7 * BPS, 8 + 7 * BPS, 12 + 7 * BPS) + "mflo %[count] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [count]"=&r"(count) + : [a]"r"(a), [b]"r"(b) + : "memory", "hi", "lo" + ); + return count; +} + +static int SSE8x8(const uint8_t* a, const uint8_t* b) { + int count; + int temp0, temp1, temp2, temp3; + __asm__ volatile ( + "mult $zero, $zero \n\t" + GET_SSE(0 * BPS, 4 + 0 * BPS, 1 * BPS, 4 + 1 * BPS) + GET_SSE(2 * BPS, 4 + 2 * BPS, 3 * BPS, 4 + 3 * BPS) + GET_SSE(4 * BPS, 4 + 4 * BPS, 5 * BPS, 4 + 5 * BPS) + GET_SSE(6 * BPS, 4 + 6 * BPS, 7 * BPS, 4 + 7 * BPS) + "mflo %[count] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [count]"=&r"(count) + : [a]"r"(a), [b]"r"(b) + : "memory", "hi", "lo" + ); + return count; +} + +static int SSE4x4(const uint8_t* a, const uint8_t* b) { + int count; + int temp0, temp1, temp2, temp3; + __asm__ volatile ( + "mult $zero, $zero \n\t" + GET_SSE(0 * BPS, 1 * BPS, 2 * BPS, 3 * BPS) + "mflo %[count] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [count]"=&r"(count) + : [a]"r"(a), [b]"r"(b) + : "memory", "hi", "lo" + ); + return count; +} + +#undef GET_SSE +#undef GET_SSE_INNER + +#endif // !WORK_AROUND_GCC + +#undef FILL_8_OR_16 +#undef FILL_PART +#undef OUTPUT_EARLY_CLOBBER_REGS_17 +#undef MUL_HALF +#undef ABS_X8 +#undef ADD_SUB_HALVES_X4 + +//------------------------------------------------------------------------------ +// Quantization +// + +// macro for one pass through for loop in QuantizeBlock reading 2 values at time +// QUANTDIV macro inlined +// J - offset in bytes (kZigzag[n] * 2) +// K - offset in bytes (kZigzag[n] * 4) +// N - offset in bytes (n * 2) +// N1 - offset in bytes ((n + 1) * 2) +#define QUANTIZE_ONE(J, K, N, N1) \ + "ulw %[temp1], " #J "(%[ppin]) \n\t" \ + "ulw %[temp2], " #J "(%[ppsharpen]) \n\t" \ + "lhu %[temp3], " #K "(%[ppzthresh]) \n\t" \ + "lhu %[temp6], " #K "+4(%[ppzthresh]) \n\t" \ + "absq_s.ph %[temp4], %[temp1] \n\t" \ + "ins %[temp3], %[temp6], 16, 16 \n\t" \ + "addu.ph %[coeff], %[temp4], %[temp2] \n\t" \ + "shra.ph %[sign], %[temp1], 15 \n\t" \ + "li %[level], 0x10001 \n\t" \ + "cmp.lt.ph %[temp3], %[coeff] \n\t" \ + "lhu %[temp1], " #J "(%[ppiq]) \n\t" \ + "pick.ph %[temp5], %[level], $0 \n\t" \ + "lw %[temp2], " #K "(%[ppbias]) \n\t" \ + "beqz %[temp5], 0f \n\t" \ + "lhu %[temp3], " #J "(%[ppq]) \n\t" \ + "beq %[temp5], %[level], 1f \n\t" \ + "andi %[temp5], %[temp5], 0x1 \n\t" \ + "andi %[temp4], %[coeff], 0xffff \n\t" \ + "beqz %[temp5], 2f \n\t" \ + "mul %[level], %[temp4], %[temp1] \n\t" \ + "sh $0, " #J "+2(%[ppin]) \n\t" \ + "sh $0, " #N1 "(%[pout]) \n\t" \ + "addu %[level], %[level], %[temp2] \n\t" \ + "sra %[level], %[level], 17 \n\t" \ + "slt %[temp4], %[max_level], %[level] \n\t" \ + "movn %[level], %[max_level], %[temp4] \n\t" \ + "andi %[temp6], %[sign], 0xffff \n\t" \ + "xor %[level], %[level], %[temp6] \n\t" \ + "subu %[level], %[level], %[temp6] \n\t" \ + "mul %[temp5], %[level], %[temp3] \n\t" \ + "or %[ret], %[ret], %[level] \n\t" \ + "sh %[level], " #N "(%[pout]) \n\t" \ + "sh %[temp5], " #J "(%[ppin]) \n\t" \ + "j 3f \n\t" \ +"2: \n\t" \ + "lhu %[temp1], " #J "+2(%[ppiq]) \n\t" \ + "srl %[temp5], %[coeff], 16 \n\t" \ + "mul %[level], %[temp5], %[temp1] \n\t" \ + "lw %[temp2], " #K "+4(%[ppbias]) \n\t" \ + "lhu %[temp3], " #J "+2(%[ppq]) \n\t" \ + "addu %[level], %[level], %[temp2] \n\t" \ + "sra %[level], %[level], 17 \n\t" \ + "srl %[temp6], %[sign], 16 \n\t" \ + "slt %[temp4], %[max_level], %[level] \n\t" \ + "movn %[level], %[max_level], %[temp4] \n\t" \ + "xor %[level], %[level], %[temp6] \n\t" \ + "subu %[level], %[level], %[temp6] \n\t" \ + "mul %[temp5], %[level], %[temp3] \n\t" \ + "sh $0, " #J "(%[ppin]) \n\t" \ + "sh $0, " #N "(%[pout]) \n\t" \ + "or %[ret], %[ret], %[level] \n\t" \ + "sh %[temp5], " #J "+2(%[ppin]) \n\t" \ + "sh %[level], " #N1 "(%[pout]) \n\t" \ + "j 3f \n\t" \ +"1: \n\t" \ + "lhu %[temp1], " #J "(%[ppiq]) \n\t" \ + "lw %[temp2], " #K "(%[ppbias]) \n\t" \ + "ulw %[temp3], " #J "(%[ppq]) \n\t" \ + "andi %[temp5], %[coeff], 0xffff \n\t" \ + "srl %[temp0], %[coeff], 16 \n\t" \ + "lhu %[temp6], " #J "+2(%[ppiq]) \n\t" \ + "lw %[coeff], " #K "+4(%[ppbias]) \n\t" \ + "mul %[level], %[temp5], %[temp1] \n\t" \ + "mul %[temp4], %[temp0], %[temp6] \n\t" \ + "addu %[level], %[level], %[temp2] \n\t" \ + "addu %[temp4], %[temp4], %[coeff] \n\t" \ + "precrq.ph.w %[level], %[temp4], %[level] \n\t" \ + "shra.ph %[level], %[level], 1 \n\t" \ + "cmp.lt.ph %[max_level1],%[level] \n\t" \ + "pick.ph %[level], %[max_level], %[level] \n\t" \ + "xor %[level], %[level], %[sign] \n\t" \ + "subu.ph %[level], %[level], %[sign] \n\t" \ + "mul.ph %[temp3], %[level], %[temp3] \n\t" \ + "or %[ret], %[ret], %[level] \n\t" \ + "sh %[level], " #N "(%[pout]) \n\t" \ + "srl %[level], %[level], 16 \n\t" \ + "sh %[level], " #N1 "(%[pout]) \n\t" \ + "usw %[temp3], " #J "(%[ppin]) \n\t" \ + "j 3f \n\t" \ +"0: \n\t" \ + "sh $0, " #N "(%[pout]) \n\t" \ + "sh $0, " #N1 "(%[pout]) \n\t" \ + "usw $0, " #J "(%[ppin]) \n\t" \ +"3: \n\t" + +static int QuantizeBlock(int16_t in[16], int16_t out[16], + const VP8Matrix* const mtx) { + int temp0, temp1, temp2, temp3, temp4, temp5,temp6; + int sign, coeff, level; + int max_level = MAX_LEVEL; + int max_level1 = max_level << 16 | max_level; + int ret = 0; + + int16_t* ppin = &in[0]; + int16_t* pout = &out[0]; + const uint16_t* ppsharpen = &mtx->sharpen_[0]; + const uint32_t* ppzthresh = &mtx->zthresh_[0]; + const uint16_t* ppq = &mtx->q_[0]; + const uint16_t* ppiq = &mtx->iq_[0]; + const uint32_t* ppbias = &mtx->bias_[0]; + + __asm__ volatile ( + QUANTIZE_ONE( 0, 0, 0, 2) + QUANTIZE_ONE( 4, 8, 10, 12) + QUANTIZE_ONE( 8, 16, 4, 8) + QUANTIZE_ONE(12, 24, 14, 24) + QUANTIZE_ONE(16, 32, 6, 16) + QUANTIZE_ONE(20, 40, 22, 26) + QUANTIZE_ONE(24, 48, 18, 20) + QUANTIZE_ONE(28, 56, 28, 30) + + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [sign]"=&r"(sign), [coeff]"=&r"(coeff), + [level]"=&r"(level), [temp6]"=&r"(temp6), [ret]"+&r"(ret) + : [ppin]"r"(ppin), [pout]"r"(pout), [max_level1]"r"(max_level1), + [ppiq]"r"(ppiq), [max_level]"r"(max_level), + [ppbias]"r"(ppbias), [ppzthresh]"r"(ppzthresh), + [ppsharpen]"r"(ppsharpen), [ppq]"r"(ppq) + : "memory", "hi", "lo" + ); + + return (ret != 0); +} + +static int Quantize2Blocks(int16_t in[32], int16_t out[32], + const VP8Matrix* const mtx) { + int nz; + nz = QuantizeBlock(in + 0 * 16, out + 0 * 16, mtx) << 0; + nz |= QuantizeBlock(in + 1 * 16, out + 1 * 16, mtx) << 1; + return nz; +} + +#undef QUANTIZE_ONE + +// macro for one horizontal pass in FTransformWHT +// temp0..temp7 holds tmp[0]..tmp[15] +// A, B, C, D - offset in bytes to load from in buffer +// TEMP0, TEMP1 - registers for corresponding tmp elements +#define HORIZONTAL_PASS_WHT(A, B, C, D, TEMP0, TEMP1) \ + "lh %[" #TEMP0 "], " #A "(%[in]) \n\t" \ + "lh %[" #TEMP1 "], " #B "(%[in]) \n\t" \ + "lh %[temp8], " #C "(%[in]) \n\t" \ + "lh %[temp9], " #D "(%[in]) \n\t" \ + "ins %[" #TEMP1 "], %[" #TEMP0 "], 16, 16 \n\t" \ + "ins %[temp9], %[temp8], 16, 16 \n\t" \ + "subq.ph %[temp8], %[" #TEMP1 "], %[temp9] \n\t" \ + "addq.ph %[temp9], %[" #TEMP1 "], %[temp9] \n\t" \ + "precrq.ph.w %[" #TEMP0 "], %[temp8], %[temp9] \n\t" \ + "append %[temp8], %[temp9], 16 \n\t" \ + "subq.ph %[" #TEMP1 "], %[" #TEMP0 "], %[temp8] \n\t" \ + "addq.ph %[" #TEMP0 "], %[" #TEMP0 "], %[temp8] \n\t" \ + "rotr %[" #TEMP1 "], %[" #TEMP1 "], 16 \n\t" + +// macro for one vertical pass in FTransformWHT +// temp0..temp7 holds tmp[0]..tmp[15] +// A, B, C, D - offsets in bytes to store to out buffer +// TEMP0, TEMP2, TEMP4 and TEMP6 - registers for corresponding tmp elements +#define VERTICAL_PASS_WHT(A, B, C, D, TEMP0, TEMP2, TEMP4, TEMP6) \ + "addq.ph %[temp8], %[" #TEMP0 "], %[" #TEMP4 "] \n\t" \ + "addq.ph %[temp9], %[" #TEMP2 "], %[" #TEMP6 "] \n\t" \ + "subq.ph %[" #TEMP2 "], %[" #TEMP2 "], %[" #TEMP6 "] \n\t" \ + "subq.ph %[" #TEMP6 "], %[" #TEMP0 "], %[" #TEMP4 "] \n\t" \ + "addqh.ph %[" #TEMP0 "], %[temp8], %[temp9] \n\t" \ + "subqh.ph %[" #TEMP4 "], %[" #TEMP6 "], %[" #TEMP2 "] \n\t" \ + "addqh.ph %[" #TEMP2 "], %[" #TEMP2 "], %[" #TEMP6 "] \n\t" \ + "subqh.ph %[" #TEMP6 "], %[temp8], %[temp9] \n\t" \ + "usw %[" #TEMP0 "], " #A "(%[out]) \n\t" \ + "usw %[" #TEMP2 "], " #B "(%[out]) \n\t" \ + "usw %[" #TEMP4 "], " #C "(%[out]) \n\t" \ + "usw %[" #TEMP6 "], " #D "(%[out]) \n\t" + +static void FTransformWHT(const int16_t* in, int16_t* out) { + int temp0, temp1, temp2, temp3, temp4; + int temp5, temp6, temp7, temp8, temp9; + + __asm__ volatile ( + HORIZONTAL_PASS_WHT( 0, 32, 64, 96, temp0, temp1) + HORIZONTAL_PASS_WHT(128, 160, 192, 224, temp2, temp3) + HORIZONTAL_PASS_WHT(256, 288, 320, 352, temp4, temp5) + HORIZONTAL_PASS_WHT(384, 416, 448, 480, temp6, temp7) + VERTICAL_PASS_WHT(0, 8, 16, 24, temp0, temp2, temp4, temp6) + VERTICAL_PASS_WHT(4, 12, 20, 28, temp1, temp3, temp5, temp7) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), + [temp9]"=&r"(temp9) + : [in]"r"(in), [out]"r"(out) + : "memory" + ); +} + +#undef VERTICAL_PASS_WHT +#undef HORIZONTAL_PASS_WHT + +// macro for converting coefficients to bin +// convert 8 coeffs at time +// A, B, C, D - offsets in bytes to load from out buffer +#define CONVERT_COEFFS_TO_BIN(A, B, C, D) \ + "ulw %[temp0], " #A "(%[out]) \n\t" \ + "ulw %[temp1], " #B "(%[out]) \n\t" \ + "ulw %[temp2], " #C "(%[out]) \n\t" \ + "ulw %[temp3], " #D "(%[out]) \n\t" \ + "absq_s.ph %[temp0], %[temp0] \n\t" \ + "absq_s.ph %[temp1], %[temp1] \n\t" \ + "absq_s.ph %[temp2], %[temp2] \n\t" \ + "absq_s.ph %[temp3], %[temp3] \n\t" \ + "shra.ph %[temp0], %[temp0], 3 \n\t" \ + "shra.ph %[temp1], %[temp1], 3 \n\t" \ + "shra.ph %[temp2], %[temp2], 3 \n\t" \ + "shra.ph %[temp3], %[temp3], 3 \n\t" \ + "shll_s.ph %[temp0], %[temp0], 10 \n\t" \ + "shll_s.ph %[temp1], %[temp1], 10 \n\t" \ + "shll_s.ph %[temp2], %[temp2], 10 \n\t" \ + "shll_s.ph %[temp3], %[temp3], 10 \n\t" \ + "shrl.ph %[temp0], %[temp0], 10 \n\t" \ + "shrl.ph %[temp1], %[temp1], 10 \n\t" \ + "shrl.ph %[temp2], %[temp2], 10 \n\t" \ + "shrl.ph %[temp3], %[temp3], 10 \n\t" \ + "shll.ph %[temp0], %[temp0], 2 \n\t" \ + "shll.ph %[temp1], %[temp1], 2 \n\t" \ + "shll.ph %[temp2], %[temp2], 2 \n\t" \ + "shll.ph %[temp3], %[temp3], 2 \n\t" \ + "ext %[temp4], %[temp0], 0, 16 \n\t" \ + "ext %[temp0], %[temp0], 16, 16 \n\t" \ + "addu %[temp4], %[temp4], %[dist] \n\t" \ + "addu %[temp0], %[temp0], %[dist] \n\t" \ + "ext %[temp5], %[temp1], 0, 16 \n\t" \ + "lw %[temp8], 0(%[temp4]) \n\t" \ + "ext %[temp1], %[temp1], 16, 16 \n\t" \ + "addu %[temp5], %[temp5], %[dist] \n\t" \ + "addiu %[temp8], %[temp8], 1 \n\t" \ + "sw %[temp8], 0(%[temp4]) \n\t" \ + "lw %[temp8], 0(%[temp0]) \n\t" \ + "addu %[temp1], %[temp1], %[dist] \n\t" \ + "ext %[temp6], %[temp2], 0, 16 \n\t" \ + "addiu %[temp8], %[temp8], 1 \n\t" \ + "sw %[temp8], 0(%[temp0]) \n\t" \ + "lw %[temp8], 0(%[temp5]) \n\t" \ + "ext %[temp2], %[temp2], 16, 16 \n\t" \ + "addu %[temp6], %[temp6], %[dist] \n\t" \ + "addiu %[temp8], %[temp8], 1 \n\t" \ + "sw %[temp8], 0(%[temp5]) \n\t" \ + "lw %[temp8], 0(%[temp1]) \n\t" \ + "addu %[temp2], %[temp2], %[dist] \n\t" \ + "ext %[temp7], %[temp3], 0, 16 \n\t" \ + "addiu %[temp8], %[temp8], 1 \n\t" \ + "sw %[temp8], 0(%[temp1]) \n\t" \ + "lw %[temp8], 0(%[temp6]) \n\t" \ + "ext %[temp3], %[temp3], 16, 16 \n\t" \ + "addu %[temp7], %[temp7], %[dist] \n\t" \ + "addiu %[temp8], %[temp8], 1 \n\t" \ + "sw %[temp8], 0(%[temp6]) \n\t" \ + "lw %[temp8], 0(%[temp2]) \n\t" \ + "addu %[temp3], %[temp3], %[dist] \n\t" \ + "addiu %[temp8], %[temp8], 1 \n\t" \ + "sw %[temp8], 0(%[temp2]) \n\t" \ + "lw %[temp8], 0(%[temp7]) \n\t" \ + "addiu %[temp8], %[temp8], 1 \n\t" \ + "sw %[temp8], 0(%[temp7]) \n\t" \ + "lw %[temp8], 0(%[temp3]) \n\t" \ + "addiu %[temp8], %[temp8], 1 \n\t" \ + "sw %[temp8], 0(%[temp3]) \n\t" + +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 }; + const int max_coeff = (MAX_COEFF_THRESH << 16) + MAX_COEFF_THRESH; + for (j = start_block; j < end_block; ++j) { + int16_t out[16]; + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8; + + VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); + + // Convert coefficients to bin. + __asm__ volatile ( + CONVERT_COEFFS_TO_BIN( 0, 4, 8, 12) + CONVERT_COEFFS_TO_BIN(16, 20, 24, 28) + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [temp8]"=&r"(temp8) + : [dist]"r"(distribution), [out]"r"(out), [max_coeff]"r"(max_coeff) + : "memory" + ); + } + VP8SetHistogramData(distribution, histo); +} + +#undef CONVERT_COEFFS_TO_BIN + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspInitMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitMIPSdspR2(void) { + VP8FTransform = FTransform; + VP8ITransform = ITransform; + VP8TDisto4x4 = Disto4x4; + VP8TDisto16x16 = Disto16x16; + VP8EncPredLuma16 = Intra16Preds; + VP8EncPredChroma8 = IntraChromaPreds; + VP8EncPredLuma4 = Intra4Preds; +#if !defined(WORK_AROUND_GCC) + VP8SSE16x16 = SSE16x16; + VP8SSE8x8 = SSE8x8; + VP8SSE16x8 = SSE16x8; + VP8SSE4x4 = SSE4x4; +#endif + VP8EncQuantizeBlock = QuantizeBlock; + VP8EncQuantize2Blocks = Quantize2Blocks; + VP8FTransformWHT = FTransformWHT; + VP8CollectHistogram = CollectHistogram; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(VP8EncDspInitMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/enc_neon.c b/thirdparty/libwebp/dsp/enc_neon.c new file mode 100644 index 0000000000..46f6bf9a33 --- /dev/null +++ b/thirdparty/libwebp/dsp/enc_neon.c @@ -0,0 +1,920 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 speed-critical encoding functions. +// +// adapted from libvpx (http://www.webmproject.org/code/) + +#include "./dsp.h" + +#if defined(WEBP_USE_NEON) + +#include <assert.h> + +#include "./neon.h" +#include "../enc/vp8enci.h" + +//------------------------------------------------------------------------------ +// Transforms (Paragraph 14.4) + +// Inverse transform. +// This code is pretty much the same as TransformOne in the dec_neon.c, except +// for subtraction to *ref. See the comments there for algorithmic explanations. + +static const int16_t kC1 = 20091; +static const int16_t kC2 = 17734; // half of kC2, actually. See comment above. + +// This code works but is *slower* than the inlined-asm version below +// (with gcc-4.6). So we disable it for now. Later, it'll be conditional to +// WEBP_USE_INTRINSICS define. +// With gcc-4.8, it's a little faster speed than inlined-assembly. +#if defined(WEBP_USE_INTRINSICS) + +// Treats 'v' as an uint8x8_t and zero extends to an int16x8_t. +static WEBP_INLINE int16x8_t ConvertU8ToS16(uint32x2_t v) { + return vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_u32(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, + const uint8_t* const ref, 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*)(ref + 0 * BPS), dst01, 0); + dst23 = vld1_lane_u32((uint32_t*)(ref + 2 * BPS), dst23, 0); + dst01 = vld1_lane_u32((uint32_t*)(ref + 1 * BPS), dst01, 1); + dst23 = vld1_lane_u32((uint32_t*)(ref + 3 * BPS), dst23, 1); + + { + // Convert to 16b. + const int16x8_t dst01_s16 = ConvertU8ToS16(dst01); + const int16x8_t dst23_s16 = ConvertU8ToS16(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); + } +} + +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 ITransformOne(const uint8_t* ref, + 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], ref, dst); +} + +#else + +static void ITransformOne(const uint8_t* ref, + const int16_t* in, uint8_t* dst) { + const int kBPS = BPS; + const int16_t kC1C2[] = { kC1, kC2, 0, 0 }; + + __asm__ volatile ( + "vld1.16 {q1, q2}, [%[in]] \n" + "vld1.16 {d0}, [%[kC1C2]] \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" + + // q8 = in[4]/[12] * kC1 >> 16 + "vshr.s16 q8, q8, #1 \n" + + // Add {in[4], in[12]} back after the multiplication. + "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" + + "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], [%[ref]], %[kBPS] \n" + "vld1.32 d6[1], [%[ref]], %[kBPS] \n" + "vld1.32 d7[0], [%[ref]], %[kBPS] \n" + "vld1.32 d7[1], [%[ref]], %[kBPS] \n" + + "sub %[ref], %[ref], %[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), [kC1C2] "r"(kC1C2), [ref] "r"(ref) // constants + : "memory", "q0", "q1", "q2", "q8", "q9", "q10", "q11" // clobbered + ); +} + +#endif // WEBP_USE_INTRINSICS + +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); + } +} + +// Load all 4x4 pixels into a single uint8x16_t variable. +static uint8x16_t Load4x4(const uint8_t* src) { + uint32x4_t out = vdupq_n_u32(0); + out = vld1q_lane_u32((const uint32_t*)(src + 0 * BPS), out, 0); + out = vld1q_lane_u32((const uint32_t*)(src + 1 * BPS), out, 1); + out = vld1q_lane_u32((const uint32_t*)(src + 2 * BPS), out, 2); + out = vld1q_lane_u32((const uint32_t*)(src + 3 * BPS), out, 3); + return vreinterpretq_u8_u32(out); +} + +// Forward transform. + +#if defined(WEBP_USE_INTRINSICS) + +static WEBP_INLINE void Transpose4x4_S16(const int16x4_t A, const int16x4_t B, + const int16x4_t C, const int16x4_t D, + int16x8_t* const out01, + int16x8_t* const out32) { + const int16x4x2_t AB = vtrn_s16(A, B); + const int16x4x2_t CD = vtrn_s16(C, D); + const int32x2x2_t tmp02 = vtrn_s32(vreinterpret_s32_s16(AB.val[0]), + vreinterpret_s32_s16(CD.val[0])); + const int32x2x2_t tmp13 = vtrn_s32(vreinterpret_s32_s16(AB.val[1]), + vreinterpret_s32_s16(CD.val[1])); + *out01 = vreinterpretq_s16_s64( + vcombine_s64(vreinterpret_s64_s32(tmp02.val[0]), + vreinterpret_s64_s32(tmp13.val[0]))); + *out32 = vreinterpretq_s16_s64( + vcombine_s64(vreinterpret_s64_s32(tmp13.val[1]), + vreinterpret_s64_s32(tmp02.val[1]))); +} + +static WEBP_INLINE int16x8_t DiffU8ToS16(const uint8x8_t a, + const uint8x8_t b) { + return vreinterpretq_s16_u16(vsubl_u8(a, b)); +} + +static void FTransform(const uint8_t* src, const uint8_t* ref, + int16_t* out) { + int16x8_t d0d1, d3d2; // working 4x4 int16 variables + { + const uint8x16_t S0 = Load4x4(src); + const uint8x16_t R0 = Load4x4(ref); + const int16x8_t D0D1 = DiffU8ToS16(vget_low_u8(S0), vget_low_u8(R0)); + const int16x8_t D2D3 = DiffU8ToS16(vget_high_u8(S0), vget_high_u8(R0)); + const int16x4_t D0 = vget_low_s16(D0D1); + const int16x4_t D1 = vget_high_s16(D0D1); + const int16x4_t D2 = vget_low_s16(D2D3); + const int16x4_t D3 = vget_high_s16(D2D3); + Transpose4x4_S16(D0, D1, D2, D3, &d0d1, &d3d2); + } + { // 1rst pass + const int32x4_t kCst937 = vdupq_n_s32(937); + const int32x4_t kCst1812 = vdupq_n_s32(1812); + const int16x8_t a0a1 = vaddq_s16(d0d1, d3d2); // d0+d3 | d1+d2 (=a0|a1) + const int16x8_t a3a2 = vsubq_s16(d0d1, d3d2); // d0-d3 | d1-d2 (=a3|a2) + const int16x8_t a0a1_2 = vshlq_n_s16(a0a1, 3); + const int16x4_t tmp0 = vadd_s16(vget_low_s16(a0a1_2), + vget_high_s16(a0a1_2)); + const int16x4_t tmp2 = vsub_s16(vget_low_s16(a0a1_2), + vget_high_s16(a0a1_2)); + const int32x4_t a3_2217 = vmull_n_s16(vget_low_s16(a3a2), 2217); + const int32x4_t a2_2217 = vmull_n_s16(vget_high_s16(a3a2), 2217); + const int32x4_t a2_p_a3 = vmlal_n_s16(a2_2217, vget_low_s16(a3a2), 5352); + const int32x4_t a3_m_a2 = vmlsl_n_s16(a3_2217, vget_high_s16(a3a2), 5352); + const int16x4_t tmp1 = vshrn_n_s32(vaddq_s32(a2_p_a3, kCst1812), 9); + const int16x4_t tmp3 = vshrn_n_s32(vaddq_s32(a3_m_a2, kCst937), 9); + Transpose4x4_S16(tmp0, tmp1, tmp2, tmp3, &d0d1, &d3d2); + } + { // 2nd pass + // the (1<<16) addition is for the replacement: a3!=0 <-> 1-(a3==0) + const int32x4_t kCst12000 = vdupq_n_s32(12000 + (1 << 16)); + const int32x4_t kCst51000 = vdupq_n_s32(51000); + const int16x8_t a0a1 = vaddq_s16(d0d1, d3d2); // d0+d3 | d1+d2 (=a0|a1) + const int16x8_t a3a2 = vsubq_s16(d0d1, d3d2); // d0-d3 | d1-d2 (=a3|a2) + const int16x4_t a0_k7 = vadd_s16(vget_low_s16(a0a1), vdup_n_s16(7)); + const int16x4_t out0 = vshr_n_s16(vadd_s16(a0_k7, vget_high_s16(a0a1)), 4); + const int16x4_t out2 = vshr_n_s16(vsub_s16(a0_k7, vget_high_s16(a0a1)), 4); + const int32x4_t a3_2217 = vmull_n_s16(vget_low_s16(a3a2), 2217); + const int32x4_t a2_2217 = vmull_n_s16(vget_high_s16(a3a2), 2217); + const int32x4_t a2_p_a3 = vmlal_n_s16(a2_2217, vget_low_s16(a3a2), 5352); + const int32x4_t a3_m_a2 = vmlsl_n_s16(a3_2217, vget_high_s16(a3a2), 5352); + const int16x4_t tmp1 = vaddhn_s32(a2_p_a3, kCst12000); + const int16x4_t out3 = vaddhn_s32(a3_m_a2, kCst51000); + const int16x4_t a3_eq_0 = + vreinterpret_s16_u16(vceq_s16(vget_low_s16(a3a2), vdup_n_s16(0))); + const int16x4_t out1 = vadd_s16(tmp1, a3_eq_0); + vst1_s16(out + 0, out0); + vst1_s16(out + 4, out1); + vst1_s16(out + 8, out2); + vst1_s16(out + 12, out3); + } +} + +#else + +// adapted from vp8/encoder/arm/neon/shortfdct_neon.asm +static const int16_t kCoeff16[] = { + 5352, 5352, 5352, 5352, 2217, 2217, 2217, 2217 +}; +static const int32_t kCoeff32[] = { + 1812, 1812, 1812, 1812, + 937, 937, 937, 937, + 12000, 12000, 12000, 12000, + 51000, 51000, 51000, 51000 +}; + +static void FTransform(const uint8_t* src, const uint8_t* ref, + int16_t* out) { + const int kBPS = BPS; + const uint8_t* src_ptr = src; + const uint8_t* ref_ptr = ref; + const int16_t* coeff16 = kCoeff16; + const int32_t* coeff32 = kCoeff32; + + __asm__ volatile ( + // load src into q4, q5 in high half + "vld1.8 {d8}, [%[src_ptr]], %[kBPS] \n" + "vld1.8 {d10}, [%[src_ptr]], %[kBPS] \n" + "vld1.8 {d9}, [%[src_ptr]], %[kBPS] \n" + "vld1.8 {d11}, [%[src_ptr]] \n" + + // load ref into q6, q7 in high half + "vld1.8 {d12}, [%[ref_ptr]], %[kBPS] \n" + "vld1.8 {d14}, [%[ref_ptr]], %[kBPS] \n" + "vld1.8 {d13}, [%[ref_ptr]], %[kBPS] \n" + "vld1.8 {d15}, [%[ref_ptr]] \n" + + // Pack the high values in to q4 and q6 + "vtrn.32 q4, q5 \n" + "vtrn.32 q6, q7 \n" + + // d[0-3] = src - ref + "vsubl.u8 q0, d8, d12 \n" + "vsubl.u8 q1, d9, d13 \n" + + // load coeff16 into q8(d16=5352, d17=2217) + "vld1.16 {q8}, [%[coeff16]] \n" + + // load coeff32 high half into q9 = 1812, q10 = 937 + "vld1.32 {q9, q10}, [%[coeff32]]! \n" + + // load coeff32 low half into q11=12000, q12=51000 + "vld1.32 {q11,q12}, [%[coeff32]] \n" + + // part 1 + // Transpose. Register dN is the same as dN in C + "vtrn.32 d0, d2 \n" + "vtrn.32 d1, d3 \n" + "vtrn.16 d0, d1 \n" + "vtrn.16 d2, d3 \n" + + "vadd.s16 d4, d0, d3 \n" // a0 = d0 + d3 + "vadd.s16 d5, d1, d2 \n" // a1 = d1 + d2 + "vsub.s16 d6, d1, d2 \n" // a2 = d1 - d2 + "vsub.s16 d7, d0, d3 \n" // a3 = d0 - d3 + + "vadd.s16 d0, d4, d5 \n" // a0 + a1 + "vshl.s16 d0, d0, #3 \n" // temp[0+i*4] = (a0+a1) << 3 + "vsub.s16 d2, d4, d5 \n" // a0 - a1 + "vshl.s16 d2, d2, #3 \n" // (temp[2+i*4] = (a0-a1) << 3 + + "vmlal.s16 q9, d7, d16 \n" // a3*5352 + 1812 + "vmlal.s16 q10, d7, d17 \n" // a3*2217 + 937 + "vmlal.s16 q9, d6, d17 \n" // a2*2217 + a3*5352 + 1812 + "vmlsl.s16 q10, d6, d16 \n" // a3*2217 + 937 - a2*5352 + + // temp[1+i*4] = (d2*2217 + d3*5352 + 1812) >> 9 + // temp[3+i*4] = (d3*2217 + 937 - d2*5352) >> 9 + "vshrn.s32 d1, q9, #9 \n" + "vshrn.s32 d3, q10, #9 \n" + + // part 2 + // transpose d0=ip[0], d1=ip[4], d2=ip[8], d3=ip[12] + "vtrn.32 d0, d2 \n" + "vtrn.32 d1, d3 \n" + "vtrn.16 d0, d1 \n" + "vtrn.16 d2, d3 \n" + + "vmov.s16 d26, #7 \n" + + "vadd.s16 d4, d0, d3 \n" // a1 = ip[0] + ip[12] + "vadd.s16 d5, d1, d2 \n" // b1 = ip[4] + ip[8] + "vsub.s16 d6, d1, d2 \n" // c1 = ip[4] - ip[8] + "vadd.s16 d4, d4, d26 \n" // a1 + 7 + "vsub.s16 d7, d0, d3 \n" // d1 = ip[0] - ip[12] + + "vadd.s16 d0, d4, d5 \n" // op[0] = a1 + b1 + 7 + "vsub.s16 d2, d4, d5 \n" // op[8] = a1 - b1 + 7 + + "vmlal.s16 q11, d7, d16 \n" // d1*5352 + 12000 + "vmlal.s16 q12, d7, d17 \n" // d1*2217 + 51000 + + "vceq.s16 d4, d7, #0 \n" + + "vshr.s16 d0, d0, #4 \n" + "vshr.s16 d2, d2, #4 \n" + + "vmlal.s16 q11, d6, d17 \n" // c1*2217 + d1*5352 + 12000 + "vmlsl.s16 q12, d6, d16 \n" // d1*2217 - c1*5352 + 51000 + + "vmvn d4, d4 \n" // !(d1 == 0) + // op[4] = (c1*2217 + d1*5352 + 12000)>>16 + "vshrn.s32 d1, q11, #16 \n" + // op[4] += (d1!=0) + "vsub.s16 d1, d1, d4 \n" + // op[12]= (d1*2217 - c1*5352 + 51000)>>16 + "vshrn.s32 d3, q12, #16 \n" + + // set result to out array + "vst1.16 {q0, q1}, [%[out]] \n" + : [src_ptr] "+r"(src_ptr), [ref_ptr] "+r"(ref_ptr), + [coeff32] "+r"(coeff32) // modified registers + : [kBPS] "r"(kBPS), [coeff16] "r"(coeff16), + [out] "r"(out) // constants + : "memory", "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8", "q9", + "q10", "q11", "q12", "q13" // clobbered + ); +} + +#endif + +#define LOAD_LANE_16b(VALUE, LANE) do { \ + (VALUE) = vld1_lane_s16(src, (VALUE), (LANE)); \ + src += stride; \ +} while (0) + +static void FTransformWHT(const int16_t* src, int16_t* out) { + const int stride = 16; + const int16x4_t zero = vdup_n_s16(0); + int32x4x4_t tmp0; + int16x4x4_t in; + INIT_VECTOR4(in, zero, zero, zero, zero); + LOAD_LANE_16b(in.val[0], 0); + LOAD_LANE_16b(in.val[1], 0); + LOAD_LANE_16b(in.val[2], 0); + LOAD_LANE_16b(in.val[3], 0); + LOAD_LANE_16b(in.val[0], 1); + LOAD_LANE_16b(in.val[1], 1); + LOAD_LANE_16b(in.val[2], 1); + LOAD_LANE_16b(in.val[3], 1); + LOAD_LANE_16b(in.val[0], 2); + LOAD_LANE_16b(in.val[1], 2); + LOAD_LANE_16b(in.val[2], 2); + LOAD_LANE_16b(in.val[3], 2); + LOAD_LANE_16b(in.val[0], 3); + LOAD_LANE_16b(in.val[1], 3); + LOAD_LANE_16b(in.val[2], 3); + LOAD_LANE_16b(in.val[3], 3); + + { + // a0 = in[0 * 16] + in[2 * 16] + // a1 = in[1 * 16] + in[3 * 16] + // a2 = in[1 * 16] - in[3 * 16] + // a3 = in[0 * 16] - in[2 * 16] + const int32x4_t a0 = vaddl_s16(in.val[0], in.val[2]); + const int32x4_t a1 = vaddl_s16(in.val[1], in.val[3]); + const int32x4_t a2 = vsubl_s16(in.val[1], in.val[3]); + const int32x4_t a3 = vsubl_s16(in.val[0], in.val[2]); + tmp0.val[0] = vaddq_s32(a0, a1); + tmp0.val[1] = vaddq_s32(a3, a2); + tmp0.val[2] = vsubq_s32(a3, a2); + tmp0.val[3] = vsubq_s32(a0, a1); + } + { + const int32x4x4_t tmp1 = Transpose4x4(tmp0); + // a0 = tmp[0 + i] + tmp[ 8 + i] + // a1 = tmp[4 + i] + tmp[12 + i] + // a2 = tmp[4 + i] - tmp[12 + i] + // a3 = tmp[0 + i] - tmp[ 8 + i] + const int32x4_t a0 = vaddq_s32(tmp1.val[0], tmp1.val[2]); + const int32x4_t a1 = vaddq_s32(tmp1.val[1], tmp1.val[3]); + const int32x4_t a2 = vsubq_s32(tmp1.val[1], tmp1.val[3]); + const int32x4_t a3 = vsubq_s32(tmp1.val[0], tmp1.val[2]); + const int32x4_t b0 = vhaddq_s32(a0, a1); // (a0 + a1) >> 1 + const int32x4_t b1 = vhaddq_s32(a3, a2); // (a3 + a2) >> 1 + const int32x4_t b2 = vhsubq_s32(a3, a2); // (a3 - a2) >> 1 + const int32x4_t b3 = vhsubq_s32(a0, a1); // (a0 - a1) >> 1 + const int16x4_t out0 = vmovn_s32(b0); + const int16x4_t out1 = vmovn_s32(b1); + const int16x4_t out2 = vmovn_s32(b2); + const int16x4_t out3 = vmovn_s32(b3); + + vst1_s16(out + 0, out0); + vst1_s16(out + 4, out1); + vst1_s16(out + 8, out2); + vst1_s16(out + 12, out3); + } +} +#undef LOAD_LANE_16b + +//------------------------------------------------------------------------------ +// Texture distortion +// +// We try to match the spectral content (weighted) between source and +// reconstructed samples. + +// a 0123, b 0123 +// a 4567, b 4567 +// a 89ab, b 89ab +// a cdef, b cdef +// +// transpose +// +// a 048c, b 048c +// a 159d, b 159d +// a 26ae, b 26ae +// a 37bf, b 37bf +// +static WEBP_INLINE int16x8x4_t DistoTranspose4x4S16(int16x8x4_t q4_in) { + const int16x8x2_t q2_tmp0 = vtrnq_s16(q4_in.val[0], q4_in.val[1]); + const int16x8x2_t q2_tmp1 = vtrnq_s16(q4_in.val[2], q4_in.val[3]); + const int32x4x2_t q2_tmp2 = vtrnq_s32(vreinterpretq_s32_s16(q2_tmp0.val[0]), + vreinterpretq_s32_s16(q2_tmp1.val[0])); + const int32x4x2_t q2_tmp3 = vtrnq_s32(vreinterpretq_s32_s16(q2_tmp0.val[1]), + vreinterpretq_s32_s16(q2_tmp1.val[1])); + q4_in.val[0] = vreinterpretq_s16_s32(q2_tmp2.val[0]); + q4_in.val[2] = vreinterpretq_s16_s32(q2_tmp2.val[1]); + q4_in.val[1] = vreinterpretq_s16_s32(q2_tmp3.val[0]); + q4_in.val[3] = vreinterpretq_s16_s32(q2_tmp3.val[1]); + return q4_in; +} + +static WEBP_INLINE int16x8x4_t DistoHorizontalPass(const int16x8x4_t q4_in) { + // {a0, a1} = {in[0] + in[2], in[1] + in[3]} + // {a3, a2} = {in[0] - in[2], in[1] - in[3]} + const int16x8_t q_a0 = vaddq_s16(q4_in.val[0], q4_in.val[2]); + const int16x8_t q_a1 = vaddq_s16(q4_in.val[1], q4_in.val[3]); + const int16x8_t q_a3 = vsubq_s16(q4_in.val[0], q4_in.val[2]); + const int16x8_t q_a2 = vsubq_s16(q4_in.val[1], q4_in.val[3]); + int16x8x4_t q4_out; + // tmp[0] = a0 + a1 + // tmp[1] = a3 + a2 + // tmp[2] = a3 - a2 + // tmp[3] = a0 - a1 + INIT_VECTOR4(q4_out, + vabsq_s16(vaddq_s16(q_a0, q_a1)), + vabsq_s16(vaddq_s16(q_a3, q_a2)), + vabdq_s16(q_a3, q_a2), vabdq_s16(q_a0, q_a1)); + return q4_out; +} + +static WEBP_INLINE int16x8x4_t DistoVerticalPass(const uint8x8x4_t q4_in) { + const int16x8_t q_a0 = vreinterpretq_s16_u16(vaddl_u8(q4_in.val[0], + q4_in.val[2])); + const int16x8_t q_a1 = vreinterpretq_s16_u16(vaddl_u8(q4_in.val[1], + q4_in.val[3])); + const int16x8_t q_a2 = vreinterpretq_s16_u16(vsubl_u8(q4_in.val[1], + q4_in.val[3])); + const int16x8_t q_a3 = vreinterpretq_s16_u16(vsubl_u8(q4_in.val[0], + q4_in.val[2])); + int16x8x4_t q4_out; + + INIT_VECTOR4(q4_out, + vaddq_s16(q_a0, q_a1), vaddq_s16(q_a3, q_a2), + vsubq_s16(q_a3, q_a2), vsubq_s16(q_a0, q_a1)); + return q4_out; +} + +static WEBP_INLINE int16x4x4_t DistoLoadW(const uint16_t* w) { + const uint16x8_t q_w07 = vld1q_u16(&w[0]); + const uint16x8_t q_w8f = vld1q_u16(&w[8]); + int16x4x4_t d4_w; + INIT_VECTOR4(d4_w, + vget_low_s16(vreinterpretq_s16_u16(q_w07)), + vget_high_s16(vreinterpretq_s16_u16(q_w07)), + vget_low_s16(vreinterpretq_s16_u16(q_w8f)), + vget_high_s16(vreinterpretq_s16_u16(q_w8f))); + return d4_w; +} + +static WEBP_INLINE int32x2_t DistoSum(const int16x8x4_t q4_in, + const int16x4x4_t d4_w) { + int32x2_t d_sum; + // sum += w[ 0] * abs(b0); + // sum += w[ 4] * abs(b1); + // sum += w[ 8] * abs(b2); + // sum += w[12] * abs(b3); + int32x4_t q_sum0 = vmull_s16(d4_w.val[0], vget_low_s16(q4_in.val[0])); + int32x4_t q_sum1 = vmull_s16(d4_w.val[1], vget_low_s16(q4_in.val[1])); + int32x4_t q_sum2 = vmull_s16(d4_w.val[2], vget_low_s16(q4_in.val[2])); + int32x4_t q_sum3 = vmull_s16(d4_w.val[3], vget_low_s16(q4_in.val[3])); + q_sum0 = vmlsl_s16(q_sum0, d4_w.val[0], vget_high_s16(q4_in.val[0])); + q_sum1 = vmlsl_s16(q_sum1, d4_w.val[1], vget_high_s16(q4_in.val[1])); + q_sum2 = vmlsl_s16(q_sum2, d4_w.val[2], vget_high_s16(q4_in.val[2])); + q_sum3 = vmlsl_s16(q_sum3, d4_w.val[3], vget_high_s16(q4_in.val[3])); + + q_sum0 = vaddq_s32(q_sum0, q_sum1); + q_sum2 = vaddq_s32(q_sum2, q_sum3); + q_sum2 = vaddq_s32(q_sum0, q_sum2); + d_sum = vpadd_s32(vget_low_s32(q_sum2), vget_high_s32(q_sum2)); + d_sum = vpadd_s32(d_sum, d_sum); + return d_sum; +} + +#define LOAD_LANE_32b(src, VALUE, LANE) \ + (VALUE) = vld1_lane_u32((const uint32_t*)(src), (VALUE), (LANE)) + +// Hadamard transform +// Returns the weighted sum of the absolute value of transformed coefficients. +// w[] contains a row-major 4 by 4 symmetric matrix. +static int Disto4x4(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + uint32x2_t d_in_ab_0123 = vdup_n_u32(0); + uint32x2_t d_in_ab_4567 = vdup_n_u32(0); + uint32x2_t d_in_ab_89ab = vdup_n_u32(0); + uint32x2_t d_in_ab_cdef = vdup_n_u32(0); + uint8x8x4_t d4_in; + + // load data a, b + LOAD_LANE_32b(a + 0 * BPS, d_in_ab_0123, 0); + LOAD_LANE_32b(a + 1 * BPS, d_in_ab_4567, 0); + LOAD_LANE_32b(a + 2 * BPS, d_in_ab_89ab, 0); + LOAD_LANE_32b(a + 3 * BPS, d_in_ab_cdef, 0); + LOAD_LANE_32b(b + 0 * BPS, d_in_ab_0123, 1); + LOAD_LANE_32b(b + 1 * BPS, d_in_ab_4567, 1); + LOAD_LANE_32b(b + 2 * BPS, d_in_ab_89ab, 1); + LOAD_LANE_32b(b + 3 * BPS, d_in_ab_cdef, 1); + INIT_VECTOR4(d4_in, + vreinterpret_u8_u32(d_in_ab_0123), + vreinterpret_u8_u32(d_in_ab_4567), + vreinterpret_u8_u32(d_in_ab_89ab), + vreinterpret_u8_u32(d_in_ab_cdef)); + + { + // Vertical pass first to avoid a transpose (vertical and horizontal passes + // are commutative because w/kWeightY is symmetric) and subsequent + // transpose. + const int16x8x4_t q4_v = DistoVerticalPass(d4_in); + const int16x4x4_t d4_w = DistoLoadW(w); + // horizontal pass + const int16x8x4_t q4_t = DistoTranspose4x4S16(q4_v); + const int16x8x4_t q4_h = DistoHorizontalPass(q4_t); + int32x2_t d_sum = DistoSum(q4_h, d4_w); + + // abs(sum2 - sum1) >> 5 + d_sum = vabs_s32(d_sum); + d_sum = vshr_n_s32(d_sum, 5); + return vget_lane_s32(d_sum, 0); + } +} +#undef LOAD_LANE_32b + +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; +} + +//------------------------------------------------------------------------------ + +static void CollectHistogram(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block, + VP8Histogram* const histo) { + const uint16x8_t max_coeff_thresh = vdupq_n_u16(MAX_COEFF_THRESH); + int j; + int distribution[MAX_COEFF_THRESH + 1] = { 0 }; + for (j = start_block; j < end_block; ++j) { + int16_t out[16]; + FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); + { + int k; + const int16x8_t a0 = vld1q_s16(out + 0); + const int16x8_t b0 = vld1q_s16(out + 8); + const uint16x8_t a1 = vreinterpretq_u16_s16(vabsq_s16(a0)); + const uint16x8_t b1 = vreinterpretq_u16_s16(vabsq_s16(b0)); + const uint16x8_t a2 = vshrq_n_u16(a1, 3); + const uint16x8_t b2 = vshrq_n_u16(b1, 3); + const uint16x8_t a3 = vminq_u16(a2, max_coeff_thresh); + const uint16x8_t b3 = vminq_u16(b2, max_coeff_thresh); + vst1q_s16(out + 0, vreinterpretq_s16_u16(a3)); + vst1q_s16(out + 8, vreinterpretq_s16_u16(b3)); + // Convert coefficients to bin. + for (k = 0; k < 16; ++k) { + ++distribution[out[k]]; + } + } + } + VP8SetHistogramData(distribution, histo); +} + +//------------------------------------------------------------------------------ + +static WEBP_INLINE void AccumulateSSE16(const uint8_t* const a, + const uint8_t* const b, + uint32x4_t* const sum) { + const uint8x16_t a0 = vld1q_u8(a); + const uint8x16_t b0 = vld1q_u8(b); + const uint8x16_t abs_diff = vabdq_u8(a0, b0); + uint16x8_t prod = vmull_u8(vget_low_u8(abs_diff), vget_low_u8(abs_diff)); + prod = vmlal_u8(prod, vget_high_u8(abs_diff), vget_high_u8(abs_diff)); + *sum = vpadalq_u16(*sum, prod); // pair-wise add and accumulate +} + +// Horizontal sum of all four uint32_t values in 'sum'. +static int SumToInt(uint32x4_t sum) { + const uint64x2_t sum2 = vpaddlq_u32(sum); + const uint64_t sum3 = vgetq_lane_u64(sum2, 0) + vgetq_lane_u64(sum2, 1); + return (int)sum3; +} + +static int SSE16x16(const uint8_t* a, const uint8_t* b) { + uint32x4_t sum = vdupq_n_u32(0); + int y; + for (y = 0; y < 16; ++y) { + AccumulateSSE16(a + y * BPS, b + y * BPS, &sum); + } + return SumToInt(sum); +} + +static int SSE16x8(const uint8_t* a, const uint8_t* b) { + uint32x4_t sum = vdupq_n_u32(0); + int y; + for (y = 0; y < 8; ++y) { + AccumulateSSE16(a + y * BPS, b + y * BPS, &sum); + } + return SumToInt(sum); +} + +static int SSE8x8(const uint8_t* a, const uint8_t* b) { + uint32x4_t sum = vdupq_n_u32(0); + int y; + for (y = 0; y < 8; ++y) { + const uint8x8_t a0 = vld1_u8(a + y * BPS); + const uint8x8_t b0 = vld1_u8(b + y * BPS); + const uint8x8_t abs_diff = vabd_u8(a0, b0); + const uint16x8_t prod = vmull_u8(abs_diff, abs_diff); + sum = vpadalq_u16(sum, prod); + } + return SumToInt(sum); +} + +static int SSE4x4(const uint8_t* a, const uint8_t* b) { + const uint8x16_t a0 = Load4x4(a); + const uint8x16_t b0 = Load4x4(b); + const uint8x16_t abs_diff = vabdq_u8(a0, b0); + uint16x8_t prod = vmull_u8(vget_low_u8(abs_diff), vget_low_u8(abs_diff)); + prod = vmlal_u8(prod, vget_high_u8(abs_diff), vget_high_u8(abs_diff)); + return SumToInt(vpaddlq_u16(prod)); +} + +//------------------------------------------------------------------------------ + +// Compilation with gcc-4.6.x is problematic for now. +#if !defined(WORK_AROUND_GCC) + +static int16x8_t Quantize(int16_t* const in, + const VP8Matrix* const mtx, int offset) { + const uint16x8_t sharp = vld1q_u16(&mtx->sharpen_[offset]); + const uint16x8_t q = vld1q_u16(&mtx->q_[offset]); + const uint16x8_t iq = vld1q_u16(&mtx->iq_[offset]); + const uint32x4_t bias0 = vld1q_u32(&mtx->bias_[offset + 0]); + const uint32x4_t bias1 = vld1q_u32(&mtx->bias_[offset + 4]); + + const int16x8_t a = vld1q_s16(in + offset); // in + const uint16x8_t b = vreinterpretq_u16_s16(vabsq_s16(a)); // coeff = abs(in) + const int16x8_t sign = vshrq_n_s16(a, 15); // sign + const uint16x8_t c = vaddq_u16(b, sharp); // + sharpen + const uint32x4_t m0 = vmull_u16(vget_low_u16(c), vget_low_u16(iq)); + const uint32x4_t m1 = vmull_u16(vget_high_u16(c), vget_high_u16(iq)); + const uint32x4_t m2 = vhaddq_u32(m0, bias0); + const uint32x4_t m3 = vhaddq_u32(m1, bias1); // (coeff * iQ + bias) >> 1 + const uint16x8_t c0 = vcombine_u16(vshrn_n_u32(m2, 16), + vshrn_n_u32(m3, 16)); // QFIX=17 = 16+1 + const uint16x8_t c1 = vminq_u16(c0, vdupq_n_u16(MAX_LEVEL)); + const int16x8_t c2 = veorq_s16(vreinterpretq_s16_u16(c1), sign); + const int16x8_t c3 = vsubq_s16(c2, sign); // restore sign + const int16x8_t c4 = vmulq_s16(c3, vreinterpretq_s16_u16(q)); + vst1q_s16(in + offset, c4); + assert(QFIX == 17); // this function can't work as is if QFIX != 16+1 + return c3; +} + +static const uint8_t kShuffles[4][8] = { + { 0, 1, 2, 3, 8, 9, 16, 17 }, + { 10, 11, 4, 5, 6, 7, 12, 13 }, + { 18, 19, 24, 25, 26, 27, 20, 21 }, + { 14, 15, 22, 23, 28, 29, 30, 31 } +}; + +static int QuantizeBlock(int16_t in[16], int16_t out[16], + const VP8Matrix* const mtx) { + const int16x8_t out0 = Quantize(in, mtx, 0); + const int16x8_t out1 = Quantize(in, mtx, 8); + uint8x8x4_t shuffles; + // vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use + // non-standard versions there. +#if defined(__APPLE__) && defined(__aarch64__) && \ + defined(__apple_build_version__) && (__apple_build_version__< 6020037) + uint8x16x2_t all_out; + INIT_VECTOR2(all_out, vreinterpretq_u8_s16(out0), vreinterpretq_u8_s16(out1)); + INIT_VECTOR4(shuffles, + vtbl2q_u8(all_out, vld1_u8(kShuffles[0])), + vtbl2q_u8(all_out, vld1_u8(kShuffles[1])), + vtbl2q_u8(all_out, vld1_u8(kShuffles[2])), + vtbl2q_u8(all_out, vld1_u8(kShuffles[3]))); +#else + uint8x8x4_t all_out; + INIT_VECTOR4(all_out, + vreinterpret_u8_s16(vget_low_s16(out0)), + vreinterpret_u8_s16(vget_high_s16(out0)), + vreinterpret_u8_s16(vget_low_s16(out1)), + vreinterpret_u8_s16(vget_high_s16(out1))); + INIT_VECTOR4(shuffles, + vtbl4_u8(all_out, vld1_u8(kShuffles[0])), + vtbl4_u8(all_out, vld1_u8(kShuffles[1])), + vtbl4_u8(all_out, vld1_u8(kShuffles[2])), + vtbl4_u8(all_out, vld1_u8(kShuffles[3]))); +#endif + // Zigzag reordering + vst1_u8((uint8_t*)(out + 0), shuffles.val[0]); + vst1_u8((uint8_t*)(out + 4), shuffles.val[1]); + vst1_u8((uint8_t*)(out + 8), shuffles.val[2]); + vst1_u8((uint8_t*)(out + 12), shuffles.val[3]); + // test zeros + if (*(uint64_t*)(out + 0) != 0) return 1; + if (*(uint64_t*)(out + 4) != 0) return 1; + if (*(uint64_t*)(out + 8) != 0) return 1; + if (*(uint64_t*)(out + 12) != 0) return 1; + return 0; +} + +static int Quantize2Blocks(int16_t in[32], int16_t out[32], + const VP8Matrix* const mtx) { + int nz; + nz = QuantizeBlock(in + 0 * 16, out + 0 * 16, mtx) << 0; + nz |= QuantizeBlock(in + 1 * 16, out + 1 * 16, mtx) << 1; + return nz; +} + +#endif // !WORK_AROUND_GCC + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspInitNEON(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitNEON(void) { + VP8ITransform = ITransform; + VP8FTransform = FTransform; + + VP8FTransformWHT = FTransformWHT; + + VP8TDisto4x4 = Disto4x4; + VP8TDisto16x16 = Disto16x16; + VP8CollectHistogram = CollectHistogram; + VP8SSE16x16 = SSE16x16; + VP8SSE16x8 = SSE16x8; + VP8SSE8x8 = SSE8x8; + VP8SSE4x4 = SSE4x4; +#if !defined(WORK_AROUND_GCC) + VP8EncQuantizeBlock = QuantizeBlock; + VP8EncQuantize2Blocks = Quantize2Blocks; +#endif +} + +#else // !WEBP_USE_NEON + +WEBP_DSP_INIT_STUB(VP8EncDspInitNEON) + +#endif // WEBP_USE_NEON diff --git a/thirdparty/libwebp/dsp/enc_sse2.c b/thirdparty/libwebp/dsp/enc_sse2.c new file mode 100644 index 0000000000..4a2e3ce14f --- /dev/null +++ b/thirdparty/libwebp/dsp/enc_sse2.c @@ -0,0 +1,1340 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Christian Duvivier (cduvivier@google.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) +#include <stdlib.h> // for abs() +#include <emmintrin.h> + +#include "./common_sse2.h" +#include "../enc/cost.h" +#include "../enc/vp8enci.h" + +//------------------------------------------------------------------------------ +// Transforms (Paragraph 14.4) + +// Does one or two inverse transforms. +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 + // 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((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((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); + 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. + VP8Transpose_2_4x4_16b(&tmp0, &tmp1, &tmp2, &tmp3, &T0, &T1, &T2, &T3); + } + + // 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. + VP8Transpose_2_4x4_16b(&shifted0, &shifted1, &shifted2, &shifted3, &T0, &T1, + &T2, &T3); + } + + // Add inverse transform to 'ref' and store. + { + 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((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(WebPMemToUint32(&ref[0 * BPS])); + ref1 = _mm_cvtsi32_si128(WebPMemToUint32(&ref[1 * BPS])); + ref2 = _mm_cvtsi32_si128(WebPMemToUint32(&ref[2 * BPS])); + ref3 = _mm_cvtsi32_si128(WebPMemToUint32(&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. + WebPUint32ToMem(&dst[0 * BPS], _mm_cvtsi128_si32(ref0)); + WebPUint32ToMem(&dst[1 * BPS], _mm_cvtsi128_si32(ref1)); + WebPUint32ToMem(&dst[2 * BPS], _mm_cvtsi128_si32(ref2)); + WebPUint32ToMem(&dst[3 * BPS], _mm_cvtsi128_si32(ref3)); + } + } +} + +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 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. + 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]); + // 00 01 02 03 * + // 10 11 12 13 * + // 20 21 22 23 * + // 30 31 32 33 * + // Shuffle. + const __m128i src_0 = _mm_unpacklo_epi16(src0, src1); + const __m128i src_1 = _mm_unpacklo_epi16(src2, src3); + // 00 01 10 11 02 03 12 13 * * ... + // 20 21 30 31 22 22 32 33 * * ... + + // Load ref. + 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_epi16(ref0, ref1); + const __m128i ref_1 = _mm_unpacklo_epi16(ref2, ref3); + + // Convert both to 16 bit. + const __m128i src_0_16b = _mm_unpacklo_epi8(src_0, zero); + const __m128i src_1_16b = _mm_unpacklo_epi8(src_1, zero); + const __m128i ref_0_16b = _mm_unpacklo_epi8(ref_0, zero); + const __m128i ref_1_16b = _mm_unpacklo_epi8(ref_1, zero); + + // Compute the difference. + const __m128i row01 = _mm_sub_epi16(src_0_16b, ref_0_16b); + const __m128i row23 = _mm_sub_epi16(src_1_16b, ref_1_16b); + __m128i v01, v32; + + // First pass + FTransformPass1(&row01, &row23, &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 kMult = _mm_set_epi16(-1, 1, -1, 1, 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 D = _mm_unpacklo_epi64(C0, C1); // a0 a1 a3 a2 a3 a2 a0 a1 + *out = _mm_madd_epi16(D, kMult); +} + +static void FTransformWHT(const int16_t* in, int16_t* out) { + // Input is 12b signed. + __m128i row0, row1, row2, row3; + // Rows are 14b signed. + FTransformWHTRow(in + 0 * 64, &row0); + FTransformWHTRow(in + 1 * 64, &row1); + FTransformWHTRow(in + 2 * 64, &row2); + FTransformWHTRow(in + 3 * 64, &row3); + + { + // The a* are 15b signed. + 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 a0a3 = _mm_packs_epi32(a0, a3); + const __m128i a1a2 = _mm_packs_epi32(a1, a2); + + // The b* are 16b signed. + const __m128i b0b1 = _mm_add_epi16(a0a3, a1a2); + const __m128i b3b2 = _mm_sub_epi16(a0a3, a1a2); + const __m128i tmp_b2b3 = _mm_unpackhi_epi64(b3b2, b3b2); + const __m128i b2b3 = _mm_unpacklo_epi64(tmp_b2b3, b3b2); + + _mm_storeu_si128((__m128i*)&out[0], _mm_srai_epi16(b0b1, 1)); + _mm_storeu_si128((__m128i*)&out[8], _mm_srai_epi16(b2b3, 1)); + } +} + +//------------------------------------------------------------------------------ +// 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 top_values = _mm_loadl_epi64((const __m128i*)top); + const __m128i left_values = _mm_loadl_epi64((const __m128i*)left); + const __m128i combined = _mm_unpacklo_epi64(top_values, left_values); + const int DC = VP8HorizontalAdd8b(&combined) + 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 top_row = _mm_load_si128((const __m128i*)top); + const __m128i left_row = _mm_load_si128((const __m128i*)left); + const int DC = + VP8HorizontalAdd8b(&top_row) + VP8HorizontalAdd8b(&left_row) + 16; + Put16(DC >> 5, dst); +} + +static WEBP_INLINE void DC16NoLeft(uint8_t* dst, const uint8_t* top) { + const __m128i top_row = _mm_load_si128((const __m128i*)top); + const int DC = VP8HorizontalAdd8b(&top_row) + 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) { + WebPUint32ToMem(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]; + WebPUint32ToMem(dst + 0 * BPS, 0x01010101U * AVG3(X, I, J)); + WebPUint32ToMem(dst + 1 * BPS, 0x01010101U * AVG3(I, J, K)); + WebPUint32ToMem(dst + 2 * BPS, 0x01010101U * AVG3(J, K, L)); + WebPUint32ToMem(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); + WebPUint32ToMem(dst + 0 * BPS, _mm_cvtsi128_si32( abcdefg )); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1))); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2))); + WebPUint32ToMem(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); + WebPUint32ToMem(dst + 0 * BPS, _mm_cvtsi128_si32( abcd )); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32( efgh )); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(_mm_slli_si128(abcd, 1))); + WebPUint32ToMem(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)); + WebPUint32ToMem(dst + 0 * BPS, _mm_cvtsi128_si32( avg1 )); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32( avg4 )); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(avg1, 1))); + WebPUint32ToMem(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_); + WebPUint32ToMem(dst + 3 * BPS, _mm_cvtsi128_si32( abcdefg )); + WebPUint32ToMem(dst + 2 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 1))); + WebPUint32ToMem(dst + 1 * BPS, _mm_cvtsi128_si32(_mm_srli_si128(abcdefg, 2))); + WebPUint32ToMem(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(WebPMemToUint32(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); + WebPUint32ToMem(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 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); +} + +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); +} + +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); + + int32_t tmp[4]; + _mm_storeu_si128((__m128i*)tmp, sum); + 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 weighted sum of the absolute value of transformed coefficients. +// w[] contains a row-major 4 by 4 symmetric matrix. +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(); + + // Load and combine inputs. + { + 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_epi32(inA_0, inB_0); + const __m128i inAB_1 = _mm_unpacklo_epi32(inA_1, inB_1); + const __m128i inAB_2 = _mm_unpacklo_epi32(inA_2, inB_2); + const __m128i inAB_3 = _mm_unpacklo_epi32(inA_3, inB_3); + tmp_0 = _mm_unpacklo_epi8(inAB_0, zero); + tmp_1 = _mm_unpacklo_epi8(inAB_1, zero); + tmp_2 = _mm_unpacklo_epi8(inAB_2, zero); + tmp_3 = _mm_unpacklo_epi8(inAB_3, zero); + // 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 + } + + // Vertical pass first to avoid a transpose (vertical and horizontal passes + // are commutative because w/kWeightY is symmetric) and subsequent transpose. + { + // 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); + // 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. + VP8Transpose_2_4x4_16b(&b0, &b1, &b2, &b3, &tmp_0, &tmp_1, &tmp_2, &tmp_3); + } + + // Horizontal pass and difference of weighted sums. + { + // Load all inputs. + 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); + 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); + + { + 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); + } + + // 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 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 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 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; + + // Load all inputs. + __m128i in0 = _mm_loadu_si128((__m128i*)&in[0]); + __m128i in8 = _mm_loadu_si128((__m128i*)&in[8]); + 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); + coeff8 = _mm_xor_si128(in8, sign8); + coeff0 = _mm_sub_epi16(coeff0, sign0); + coeff8 = _mm_sub_epi16(coeff8, sign8); + + // coeff = abs(in) + sharpen + 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 + { + // doing calculations with 32b precision (QFIX=17) + // out = (coeff * iQ) + 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); + // 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 = 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) + 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); + + _mm_storeu_si128((__m128i*)&in[0], in0); + _mm_storeu_si128((__m128i*)&in[8], in8); + + // 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 + 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); + +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/thirdparty/libwebp/dsp/enc_sse41.c b/thirdparty/libwebp/dsp/enc_sse41.c new file mode 100644 index 0000000000..a1783901a6 --- /dev/null +++ b/thirdparty/libwebp/dsp/enc_sse41.c @@ -0,0 +1,339 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// SSE4 version of some encoding functions. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE41) +#include <smmintrin.h> +#include <stdlib.h> // for abs() + +#include "./common_sse2.h" +#include "../enc/vp8enci.h" + +//------------------------------------------------------------------------------ +// Compute susceptibility based on DCT-coeff histograms. + +static void CollectHistogram(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block, + VP8Histogram* const histo) { + 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; + + 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]); + // v = abs(out) >> 3 + const __m128i abs0 = _mm_abs_epi16(out0); + const __m128i abs1 = _mm_abs_epi16(out1); + 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); +} + +//------------------------------------------------------------------------------ +// 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. +// w[] contains a row-major 4 by 4 symmetric matrix. +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; + + // Load and combine inputs. + { + const __m128i inA_0 = _mm_loadu_si128((const __m128i*)&inA[BPS * 0]); + const __m128i inA_1 = _mm_loadu_si128((const __m128i*)&inA[BPS * 1]); + const __m128i inA_2 = _mm_loadu_si128((const __m128i*)&inA[BPS * 2]); + // In SSE4.1, with gcc 4.8 at least (maybe other versions), + // _mm_loadu_si128 is faster than _mm_loadl_epi64. But for the last lump + // of inA and inB, _mm_loadl_epi64 is still used not to have an out of + // bound read. + const __m128i inA_3 = _mm_loadl_epi64((const __m128i*)&inA[BPS * 3]); + const __m128i inB_0 = _mm_loadu_si128((const __m128i*)&inB[BPS * 0]); + const __m128i inB_1 = _mm_loadu_si128((const __m128i*)&inB[BPS * 1]); + const __m128i inB_2 = _mm_loadu_si128((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_epi32(inA_0, inB_0); + const __m128i inAB_1 = _mm_unpacklo_epi32(inA_1, inB_1); + const __m128i inAB_2 = _mm_unpacklo_epi32(inA_2, inB_2); + const __m128i inAB_3 = _mm_unpacklo_epi32(inA_3, inB_3); + tmp_0 = _mm_cvtepu8_epi16(inAB_0); + tmp_1 = _mm_cvtepu8_epi16(inAB_1); + tmp_2 = _mm_cvtepu8_epi16(inAB_2); + tmp_3 = _mm_cvtepu8_epi16(inAB_3); + // 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 + } + + // Vertical pass first to avoid a transpose (vertical and horizontal passes + // are commutative because w/kWeightY is symmetric) and subsequent transpose. + { + // 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); + // 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. + VP8Transpose_2_4x4_16b(&b0, &b1, &b2, &b3, &tmp_0, &tmp_1, &tmp_2, &tmp_3); + } + + // Horizontal pass and difference of weighted sums. + { + // Load all inputs. + 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); + 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); + + A_b0 = _mm_abs_epi16(A_b0); + A_b2 = _mm_abs_epi16(A_b2); + B_b0 = _mm_abs_epi16(B_b0); + B_b2 = _mm_abs_epi16(B_b2); + + // 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_b2 = _mm_sub_epi32(A_b0, B_b0); + _mm_storeu_si128((__m128i*)&sum[0], A_b2); + } + return sum[0] + sum[1] + sum[2] + sum[3]; +} + +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 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 +// + +// Generates a pshufb constant for shuffling 16b words. +#define PSHUFB_CST(A,B,C,D,E,F,G,H) \ + _mm_set_epi8(2 * (H) + 1, 2 * (H) + 0, 2 * (G) + 1, 2 * (G) + 0, \ + 2 * (F) + 1, 2 * (F) + 0, 2 * (E) + 1, 2 * (E) + 0, \ + 2 * (D) + 1, 2 * (D) + 0, 2 * (C) + 1, 2 * (C) + 0, \ + 2 * (B) + 1, 2 * (B) + 0, 2 * (A) + 1, 2 * (A) + 0) + +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 out0, out8; + __m128i packed_out; + + // Load all inputs. + __m128i in0 = _mm_loadu_si128((__m128i*)&in[0]); + __m128i in8 = _mm_loadu_si128((__m128i*)&in[8]); + 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]); + + // coeff = abs(in) + __m128i coeff0 = _mm_abs_epi16(in0); + __m128i coeff8 = _mm_abs_epi16(in8); + + // coeff = abs(in) + sharpen + 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 + { + // doing calculations with 32b precision (QFIX=17) + // out = (coeff * iQ) + 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); + // 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 = 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); + } + + // put sign back + out0 = _mm_sign_epi16(out0, in0); + out8 = _mm_sign_epi16(out8, in8); + + // in = out * Q + in0 = _mm_mullo_epi16(out0, q0); + in8 = _mm_mullo_epi16(out8, q8); + + _mm_storeu_si128((__m128i*)&in[0], in0); + _mm_storeu_si128((__m128i*)&in[8], in8); + + // zigzag the output before storing it. The re-ordering is: + // 0 1 2 3 4 5 6 7 | 8 9 10 11 12 13 14 15 + // -> 0 1 4[8]5 2 3 6 | 9 12 13 10 [7]11 14 15 + // There's only two misplaced entries ([8] and [7]) that are crossing the + // reg's boundaries. + // We use pshufb instead of pshuflo/pshufhi. + { + const __m128i kCst_lo = PSHUFB_CST(0, 1, 4, -1, 5, 2, 3, 6); + const __m128i kCst_7 = PSHUFB_CST(-1, -1, -1, -1, 7, -1, -1, -1); + const __m128i tmp_lo = _mm_shuffle_epi8(out0, kCst_lo); + const __m128i tmp_7 = _mm_shuffle_epi8(out0, kCst_7); // extract #7 + const __m128i kCst_hi = PSHUFB_CST(1, 4, 5, 2, -1, 3, 6, 7); + const __m128i kCst_8 = PSHUFB_CST(-1, -1, -1, 0, -1, -1, -1, -1); + const __m128i tmp_hi = _mm_shuffle_epi8(out8, kCst_hi); + const __m128i tmp_8 = _mm_shuffle_epi8(out8, kCst_8); // extract #8 + const __m128i out_z0 = _mm_or_si128(tmp_lo, tmp_8); + const __m128i out_z8 = _mm_or_si128(tmp_hi, tmp_7); + _mm_storeu_si128((__m128i*)&out[0], out_z0); + _mm_storeu_si128((__m128i*)&out[8], out_z8); + packed_out = _mm_packs_epi16(out_z0, out_z8); + } + + // detect if all 'out' values are zeroes or not + return (_mm_movemask_epi8(_mm_cmpeq_epi8(packed_out, zero)) != 0xffff); +} + +#undef PSHUFB_CST + +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 VP8EncDspInitSSE41(void); +WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitSSE41(void) { + VP8CollectHistogram = CollectHistogram; + VP8EncQuantizeBlock = QuantizeBlock; + VP8EncQuantize2Blocks = Quantize2Blocks; + VP8EncQuantizeBlockWHT = QuantizeBlockWHT; + VP8TDisto4x4 = Disto4x4; + VP8TDisto16x16 = Disto16x16; +} + +#else // !WEBP_USE_SSE41 + +WEBP_DSP_INIT_STUB(VP8EncDspInitSSE41) + +#endif // WEBP_USE_SSE41 diff --git a/thirdparty/libwebp/dsp/filters.c b/thirdparty/libwebp/dsp/filters.c new file mode 100644 index 0000000000..9f04faf0cb --- /dev/null +++ b/thirdparty/libwebp/dsp/filters.c @@ -0,0 +1,261 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Urvang (urvang@google.com) + +#include "./dsp.h" +#include <assert.h> +#include <stdlib.h> +#include <string.h> + +//------------------------------------------------------------------------------ +// Helpful macro. + +# define SANITY_CHECK(in, out) \ + assert(in != NULL); \ + assert(out != NULL); \ + assert(width > 0); \ + assert(height > 0); \ + assert(stride >= width); \ + assert(row >= 0 && num_rows > 0 && row + num_rows <= height); \ + (void)height; // Silence unused warning. + +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 stride, + int row, int num_rows, + int inverse, uint8_t* out) { + const uint8_t* preds; + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + preds = inverse ? out : in; + + if (row == 0) { + // Leftmost pixel is the same as input for topmost scanline. + out[0] = in[0]; + PredictLine(in + 1, preds, out + 1, width - 1, inverse); + row = 1; + preds += stride; + in += stride; + out += stride; + } + + // Filter line-by-line. + while (row < last_row) { + // Leftmost pixel is predicted from above. + PredictLine(in, preds - stride, out, 1, inverse); + PredictLine(in + 1, preds, out + 1, width - 1, inverse); + ++row; + preds += stride; + in += stride; + out += stride; + } +} + +//------------------------------------------------------------------------------ +// Vertical filter. + +static WEBP_INLINE void DoVerticalFilter(const uint8_t* in, + int width, int height, int stride, + int row, int num_rows, + int inverse, uint8_t* out) { + const uint8_t* preds; + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + preds = inverse ? out : in; + + if (row == 0) { + // Very first top-left pixel is copied. + out[0] = in[0]; + // Rest of top scan-line is left-predicted. + PredictLine(in + 1, preds, out + 1, width - 1, inverse); + row = 1; + in += stride; + out += stride; + } else { + // We are starting from in-between. Make sure 'preds' points to prev row. + preds -= stride; + } + + // Filter line-by-line. + while (row < last_row) { + PredictLine(in, preds, out, width, inverse); + ++row; + preds += stride; + in += stride; + out += stride; + } +} + +//------------------------------------------------------------------------------ +// Gradient filter. + +static WEBP_INLINE int GradientPredictor(uint8_t a, uint8_t b, uint8_t c) { + const int g = a + b - c; + return ((g & ~0xff) == 0) ? g : (g < 0) ? 0 : 255; // clip to 8bit +} + +static WEBP_INLINE void DoGradientFilter(const uint8_t* in, + int width, int height, int stride, + int row, int num_rows, + int inverse, uint8_t* out) { + const uint8_t* preds; + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + preds = inverse ? out : in; + + // left prediction for top scan-line + if (row == 0) { + out[0] = in[0]; + PredictLine(in + 1, preds, out + 1, width - 1, inverse); + row = 1; + preds += stride; + in += stride; + out += stride; + } + + // Filter line-by-line. + while (row < last_row) { + int w; + // leftmost pixel: predict from above. + PredictLine(in, preds - stride, out, 1, inverse); + for (w = 1; w < width; ++w) { + const int pred = GradientPredictor(preds[w - 1], + preds[w - stride], + preds[w - stride - 1]); + out[w] = in[w] + (inverse ? pred : -pred); + } + ++row; + preds += stride; + in += stride; + out += stride; + } +} + +#undef SANITY_CHECK + +//------------------------------------------------------------------------------ + +static void HorizontalFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoHorizontalFilter(data, width, height, stride, 0, height, 0, filtered_data); +} + +static void VerticalFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoVerticalFilter(data, width, height, stride, 0, height, 0, filtered_data); +} + + +static void GradientFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoGradientFilter(data, width, height, stride, 0, height, 0, filtered_data); +} + + +//------------------------------------------------------------------------------ + +static void HorizontalUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + uint8_t pred = (prev == NULL) ? 0 : prev[0]; + int i; + for (i = 0; i < width; ++i) { + out[i] = pred + in[i]; + pred = out[i]; + } +} + +static void VerticalUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + if (prev == NULL) { + HorizontalUnfilter(NULL, in, out, width); + } else { + int i; + for (i = 0; i < width; ++i) out[i] = prev[i] + in[i]; + } +} + +static void GradientUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + if (prev == NULL) { + HorizontalUnfilter(NULL, in, out, width); + } else { + uint8_t top = prev[0], top_left = top, left = top; + int i; + for (i = 0; i < width; ++i) { + top = prev[i]; // need to read this first, in case prev==out + left = in[i] + GradientPredictor(left, top, top_left); + top_left = top; + out[i] = left; + } + } +} + +//------------------------------------------------------------------------------ +// Init function + +WebPFilterFunc WebPFilters[WEBP_FILTER_LAST]; +WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST]; + +extern void VP8FiltersInitMIPSdspR2(void); +extern void VP8FiltersInitSSE2(void); + +static volatile VP8CPUInfo filters_last_cpuinfo_used = + (VP8CPUInfo)&filters_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void VP8FiltersInit(void) { + if (filters_last_cpuinfo_used == VP8GetCPUInfo) return; + + WebPUnfilters[WEBP_FILTER_NONE] = NULL; + WebPUnfilters[WEBP_FILTER_HORIZONTAL] = HorizontalUnfilter; + WebPUnfilters[WEBP_FILTER_VERTICAL] = VerticalUnfilter; + WebPUnfilters[WEBP_FILTER_GRADIENT] = GradientUnfilter; + + WebPFilters[WEBP_FILTER_NONE] = NULL; + WebPFilters[WEBP_FILTER_HORIZONTAL] = HorizontalFilter; + WebPFilters[WEBP_FILTER_VERTICAL] = VerticalFilter; + WebPFilters[WEBP_FILTER_GRADIENT] = GradientFilter; + + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + VP8FiltersInitSSE2(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + VP8FiltersInitMIPSdspR2(); + } +#endif + } + filters_last_cpuinfo_used = VP8GetCPUInfo; +} diff --git a/thirdparty/libwebp/dsp/filters_mips_dsp_r2.c b/thirdparty/libwebp/dsp/filters_mips_dsp_r2.c new file mode 100644 index 0000000000..1d82e3c2e1 --- /dev/null +++ b/thirdparty/libwebp/dsp/filters_mips_dsp_r2.c @@ -0,0 +1,395 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 +// +// Author(s): Branimir Vasic (branimir.vasic@imgtec.com) +// Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include "../dsp/dsp.h" +#include <assert.h> +#include <stdlib.h> +#include <string.h> + +//------------------------------------------------------------------------------ +// Helpful macro. + +# define SANITY_CHECK(in, out) \ + assert(in != NULL); \ + assert(out != NULL); \ + assert(width > 0); \ + assert(height > 0); \ + assert(stride >= width); \ + assert(row >= 0 && num_rows > 0 && row + num_rows <= height); \ + (void)height; // Silence unused warning. + +#define DO_PREDICT_LINE(SRC, DST, LENGTH, INVERSE) do { \ + const uint8_t* psrc = (uint8_t*)(SRC); \ + uint8_t* pdst = (uint8_t*)(DST); \ + const int ilength = (int)(LENGTH); \ + int temp0, temp1, temp2, temp3, temp4, temp5, temp6; \ + __asm__ volatile ( \ + ".set push \n\t" \ + ".set noreorder \n\t" \ + "srl %[temp0], %[length], 2 \n\t" \ + "beqz %[temp0], 4f \n\t" \ + " andi %[temp6], %[length], 3 \n\t" \ + ".if " #INVERSE " \n\t" \ + "1: \n\t" \ + "lbu %[temp1], -1(%[dst]) \n\t" \ + "lbu %[temp2], 0(%[src]) \n\t" \ + "lbu %[temp3], 1(%[src]) \n\t" \ + "lbu %[temp4], 2(%[src]) \n\t" \ + "lbu %[temp5], 3(%[src]) \n\t" \ + "addu %[temp1], %[temp1], %[temp2] \n\t" \ + "addu %[temp2], %[temp1], %[temp3] \n\t" \ + "addu %[temp3], %[temp2], %[temp4] \n\t" \ + "addu %[temp4], %[temp3], %[temp5] \n\t" \ + "sb %[temp1], 0(%[dst]) \n\t" \ + "sb %[temp2], 1(%[dst]) \n\t" \ + "sb %[temp3], 2(%[dst]) \n\t" \ + "sb %[temp4], 3(%[dst]) \n\t" \ + "addiu %[src], %[src], 4 \n\t" \ + "addiu %[temp0], %[temp0], -1 \n\t" \ + "bnez %[temp0], 1b \n\t" \ + " addiu %[dst], %[dst], 4 \n\t" \ + ".else \n\t" \ + "1: \n\t" \ + "ulw %[temp1], -1(%[src]) \n\t" \ + "ulw %[temp2], 0(%[src]) \n\t" \ + "addiu %[src], %[src], 4 \n\t" \ + "addiu %[temp0], %[temp0], -1 \n\t" \ + "subu.qb %[temp3], %[temp2], %[temp1] \n\t" \ + "usw %[temp3], 0(%[dst]) \n\t" \ + "bnez %[temp0], 1b \n\t" \ + " addiu %[dst], %[dst], 4 \n\t" \ + ".endif \n\t" \ + "4: \n\t" \ + "beqz %[temp6], 3f \n\t" \ + " nop \n\t" \ + "2: \n\t" \ + "lbu %[temp2], 0(%[src]) \n\t" \ + ".if " #INVERSE " \n\t" \ + "lbu %[temp1], -1(%[dst]) \n\t" \ + "addu %[temp3], %[temp1], %[temp2] \n\t" \ + ".else \n\t" \ + "lbu %[temp1], -1(%[src]) \n\t" \ + "subu %[temp3], %[temp1], %[temp2] \n\t" \ + ".endif \n\t" \ + "addiu %[src], %[src], 1 \n\t" \ + "sb %[temp3], 0(%[dst]) \n\t" \ + "addiu %[temp6], %[temp6], -1 \n\t" \ + "bnez %[temp6], 2b \n\t" \ + " addiu %[dst], %[dst], 1 \n\t" \ + "3: \n\t" \ + ".set pop \n\t" \ + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), \ + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), \ + [temp6]"=&r"(temp6), [dst]"+&r"(pdst), [src]"+&r"(psrc) \ + : [length]"r"(ilength) \ + : "memory" \ + ); \ + } while (0) + +static WEBP_INLINE void PredictLine(const uint8_t* src, uint8_t* dst, + int length) { + DO_PREDICT_LINE(src, dst, length, 0); +} + +#define DO_PREDICT_LINE_VERTICAL(SRC, PRED, DST, LENGTH, INVERSE) do { \ + const uint8_t* psrc = (uint8_t*)(SRC); \ + const uint8_t* ppred = (uint8_t*)(PRED); \ + uint8_t* pdst = (uint8_t*)(DST); \ + const int ilength = (int)(LENGTH); \ + int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; \ + __asm__ volatile ( \ + ".set push \n\t" \ + ".set noreorder \n\t" \ + "srl %[temp0], %[length], 0x3 \n\t" \ + "beqz %[temp0], 4f \n\t" \ + " andi %[temp7], %[length], 0x7 \n\t" \ + "1: \n\t" \ + "ulw %[temp1], 0(%[src]) \n\t" \ + "ulw %[temp2], 0(%[pred]) \n\t" \ + "ulw %[temp3], 4(%[src]) \n\t" \ + "ulw %[temp4], 4(%[pred]) \n\t" \ + "addiu %[src], %[src], 8 \n\t" \ + ".if " #INVERSE " \n\t" \ + "addu.qb %[temp5], %[temp1], %[temp2] \n\t" \ + "addu.qb %[temp6], %[temp3], %[temp4] \n\t" \ + ".else \n\t" \ + "subu.qb %[temp5], %[temp1], %[temp2] \n\t" \ + "subu.qb %[temp6], %[temp3], %[temp4] \n\t" \ + ".endif \n\t" \ + "addiu %[pred], %[pred], 8 \n\t" \ + "usw %[temp5], 0(%[dst]) \n\t" \ + "usw %[temp6], 4(%[dst]) \n\t" \ + "addiu %[temp0], %[temp0], -1 \n\t" \ + "bnez %[temp0], 1b \n\t" \ + " addiu %[dst], %[dst], 8 \n\t" \ + "4: \n\t" \ + "beqz %[temp7], 3f \n\t" \ + " nop \n\t" \ + "2: \n\t" \ + "lbu %[temp1], 0(%[src]) \n\t" \ + "lbu %[temp2], 0(%[pred]) \n\t" \ + "addiu %[src], %[src], 1 \n\t" \ + "addiu %[pred], %[pred], 1 \n\t" \ + ".if " #INVERSE " \n\t" \ + "addu %[temp3], %[temp1], %[temp2] \n\t" \ + ".else \n\t" \ + "subu %[temp3], %[temp1], %[temp2] \n\t" \ + ".endif \n\t" \ + "sb %[temp3], 0(%[dst]) \n\t" \ + "addiu %[temp7], %[temp7], -1 \n\t" \ + "bnez %[temp7], 2b \n\t" \ + " addiu %[dst], %[dst], 1 \n\t" \ + "3: \n\t" \ + ".set pop \n\t" \ + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), \ + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), \ + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [pred]"+&r"(ppred), \ + [dst]"+&r"(pdst), [src]"+&r"(psrc) \ + : [length]"r"(ilength) \ + : "memory" \ + ); \ + } while (0) + +#define PREDICT_LINE_ONE_PASS(SRC, PRED, DST) do { \ + int temp1, temp2, temp3; \ + __asm__ volatile ( \ + "lbu %[temp1], 0(%[src]) \n\t" \ + "lbu %[temp2], 0(%[pred]) \n\t" \ + "subu %[temp3], %[temp1], %[temp2] \n\t" \ + "sb %[temp3], 0(%[dst]) \n\t" \ + : [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), [temp3]"=&r"(temp3) \ + : [pred]"r"((PRED)), [dst]"r"((DST)), [src]"r"((SRC)) \ + : "memory" \ + ); \ + } while (0) + +//------------------------------------------------------------------------------ +// Horizontal filter. + +#define FILTER_LINE_BY_LINE do { \ + while (row < last_row) { \ + PREDICT_LINE_ONE_PASS(in, preds - stride, out); \ + DO_PREDICT_LINE(in + 1, out + 1, width - 1, 0); \ + ++row; \ + preds += stride; \ + in += stride; \ + out += stride; \ + } \ + } while (0) + +static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in, + int width, int height, int stride, + int row, int num_rows, + uint8_t* out) { + const uint8_t* preds; + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + preds = in; + + if (row == 0) { + // Leftmost pixel is the same as input for topmost scanline. + out[0] = in[0]; + PredictLine(in + 1, out + 1, width - 1); + row = 1; + preds += stride; + in += stride; + out += stride; + } + + // Filter line-by-line. + FILTER_LINE_BY_LINE; +} +#undef FILTER_LINE_BY_LINE + +static void HorizontalFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoHorizontalFilter(data, width, height, stride, 0, height, filtered_data); +} + +//------------------------------------------------------------------------------ +// Vertical filter. + +#define FILTER_LINE_BY_LINE do { \ + while (row < last_row) { \ + DO_PREDICT_LINE_VERTICAL(in, preds, out, width, 0); \ + ++row; \ + preds += stride; \ + in += stride; \ + out += stride; \ + } \ + } while (0) + +static WEBP_INLINE void DoVerticalFilter(const uint8_t* in, + int width, int height, int stride, + int row, int num_rows, uint8_t* out) { + const uint8_t* preds; + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + preds = in; + + if (row == 0) { + // Very first top-left pixel is copied. + out[0] = in[0]; + // Rest of top scan-line is left-predicted. + PredictLine(in + 1, out + 1, width - 1); + row = 1; + in += stride; + out += stride; + } else { + // We are starting from in-between. Make sure 'preds' points to prev row. + preds -= stride; + } + + // Filter line-by-line. + FILTER_LINE_BY_LINE; +} +#undef FILTER_LINE_BY_LINE + +static void VerticalFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoVerticalFilter(data, width, height, stride, 0, height, filtered_data); +} + +//------------------------------------------------------------------------------ +// Gradient filter. + +static WEBP_INLINE int GradientPredictor(uint8_t a, uint8_t b, uint8_t c) { + int temp0; + __asm__ volatile ( + "addu %[temp0], %[a], %[b] \n\t" + "subu %[temp0], %[temp0], %[c] \n\t" + "shll_s.w %[temp0], %[temp0], 23 \n\t" + "precrqu_s.qb.ph %[temp0], %[temp0], $zero \n\t" + "srl %[temp0], %[temp0], 24 \n\t" + : [temp0]"=&r"(temp0) + : [a]"r"(a),[b]"r"(b),[c]"r"(c) + ); + return temp0; +} + +#define FILTER_LINE_BY_LINE(PREDS, OPERATION) do { \ + while (row < last_row) { \ + int w; \ + PREDICT_LINE_ONE_PASS(in, PREDS - stride, out); \ + for (w = 1; w < width; ++w) { \ + const int pred = GradientPredictor(PREDS[w - 1], \ + PREDS[w - stride], \ + PREDS[w - stride - 1]); \ + out[w] = in[w] OPERATION pred; \ + } \ + ++row; \ + in += stride; \ + out += stride; \ + } \ + } while (0) + +static WEBP_INLINE void DoGradientFilter(const uint8_t* in, + int width, int height, int stride, + int row, int num_rows, uint8_t* out) { + const uint8_t* preds; + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + preds = in; + + // left prediction for top scan-line + if (row == 0) { + out[0] = in[0]; + PredictLine(in + 1, out + 1, width - 1); + row = 1; + preds += stride; + in += stride; + out += stride; + } + + // Filter line-by-line. + FILTER_LINE_BY_LINE(in, -); +} +#undef FILTER_LINE_BY_LINE + +static void GradientFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoGradientFilter(data, width, height, stride, 0, height, filtered_data); +} + +//------------------------------------------------------------------------------ + +static void HorizontalUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + out[0] = in[0] + (prev == NULL ? 0 : prev[0]); + DO_PREDICT_LINE(in + 1, out + 1, width - 1, 1); +} + +static void VerticalUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + if (prev == NULL) { + HorizontalUnfilter(NULL, in, out, width); + } else { + DO_PREDICT_LINE_VERTICAL(in, prev, out, width, 1); + } +} + +static void GradientUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + if (prev == NULL) { + HorizontalUnfilter(NULL, in, out, width); + } else { + uint8_t top = prev[0], top_left = top, left = top; + int i; + for (i = 0; i < width; ++i) { + top = prev[i]; // need to read this first, in case prev==dst + left = in[i] + GradientPredictor(left, top, top_left); + top_left = top; + out[i] = left; + } + } +} + +#undef DO_PREDICT_LINE_VERTICAL +#undef PREDICT_LINE_ONE_PASS +#undef DO_PREDICT_LINE +#undef SANITY_CHECK + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8FiltersInitMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8FiltersInitMIPSdspR2(void) { + WebPUnfilters[WEBP_FILTER_HORIZONTAL] = HorizontalUnfilter; + WebPUnfilters[WEBP_FILTER_VERTICAL] = VerticalUnfilter; + WebPUnfilters[WEBP_FILTER_GRADIENT] = GradientUnfilter; + + WebPFilters[WEBP_FILTER_HORIZONTAL] = HorizontalFilter; + WebPFilters[WEBP_FILTER_VERTICAL] = VerticalFilter; + WebPFilters[WEBP_FILTER_GRADIENT] = GradientFilter; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(VP8FiltersInitMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/filters_sse2.c b/thirdparty/libwebp/dsp/filters_sse2.c new file mode 100644 index 0000000000..67f77999e6 --- /dev/null +++ b/thirdparty/libwebp/dsp/filters_sse2.c @@ -0,0 +1,330 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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 variant of alpha filters +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) + +#include <assert.h> +#include <emmintrin.h> +#include <stdlib.h> +#include <string.h> + +//------------------------------------------------------------------------------ +// Helpful macro. + +# define SANITY_CHECK(in, out) \ + assert(in != NULL); \ + assert(out != NULL); \ + assert(width > 0); \ + assert(height > 0); \ + assert(stride >= width); \ + assert(row >= 0 && num_rows > 0 && row + num_rows <= height); \ + (void)height; // Silence unused warning. + +static void PredictLineTop(const uint8_t* src, const uint8_t* pred, + uint8_t* dst, int length) { + int i; + const int max_pos = length & ~31; + assert(length >= 0); + for (i = 0; i < max_pos; i += 32) { + const __m128i A0 = _mm_loadu_si128((const __m128i*)&src[i + 0]); + const __m128i A1 = _mm_loadu_si128((const __m128i*)&src[i + 16]); + const __m128i B0 = _mm_loadu_si128((const __m128i*)&pred[i + 0]); + const __m128i B1 = _mm_loadu_si128((const __m128i*)&pred[i + 16]); + const __m128i C0 = _mm_sub_epi8(A0, B0); + const __m128i C1 = _mm_sub_epi8(A1, B1); + _mm_storeu_si128((__m128i*)&dst[i + 0], C0); + _mm_storeu_si128((__m128i*)&dst[i + 16], C1); + } + for (; i < length; ++i) dst[i] = src[i] - pred[i]; +} + +// Special case for left-based prediction (when preds==dst-1 or preds==src-1). +static void PredictLineLeft(const uint8_t* src, uint8_t* dst, int length) { + int i; + const int max_pos = length & ~31; + assert(length >= 0); + for (i = 0; i < max_pos; i += 32) { + const __m128i A0 = _mm_loadu_si128((const __m128i*)(src + i + 0 )); + const __m128i B0 = _mm_loadu_si128((const __m128i*)(src + i + 0 - 1)); + const __m128i A1 = _mm_loadu_si128((const __m128i*)(src + i + 16 )); + const __m128i B1 = _mm_loadu_si128((const __m128i*)(src + i + 16 - 1)); + const __m128i C0 = _mm_sub_epi8(A0, B0); + const __m128i C1 = _mm_sub_epi8(A1, B1); + _mm_storeu_si128((__m128i*)(dst + i + 0), C0); + _mm_storeu_si128((__m128i*)(dst + i + 16), C1); + } + for (; i < length; ++i) dst[i] = src[i] - src[i - 1]; +} + +//------------------------------------------------------------------------------ +// Horizontal filter. + +static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in, + int width, int height, int stride, + int row, int num_rows, + uint8_t* out) { + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + + if (row == 0) { + // Leftmost pixel is the same as input for topmost scanline. + out[0] = in[0]; + PredictLineLeft(in + 1, out + 1, width - 1); + row = 1; + in += stride; + out += stride; + } + + // Filter line-by-line. + while (row < last_row) { + // Leftmost pixel is predicted from above. + out[0] = in[0] - in[-stride]; + PredictLineLeft(in + 1, out + 1, width - 1); + ++row; + in += stride; + out += stride; + } +} + +//------------------------------------------------------------------------------ +// Vertical filter. + +static WEBP_INLINE void DoVerticalFilter(const uint8_t* in, + int width, int height, int stride, + int row, int num_rows, uint8_t* out) { + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + + if (row == 0) { + // Very first top-left pixel is copied. + out[0] = in[0]; + // Rest of top scan-line is left-predicted. + PredictLineLeft(in + 1, out + 1, width - 1); + row = 1; + in += stride; + out += stride; + } + + // Filter line-by-line. + while (row < last_row) { + PredictLineTop(in, in - stride, out, width); + ++row; + in += stride; + out += stride; + } +} + +//------------------------------------------------------------------------------ +// Gradient filter. + +static WEBP_INLINE int GradientPredictorC(uint8_t a, uint8_t b, uint8_t c) { + const int g = a + b - c; + return ((g & ~0xff) == 0) ? g : (g < 0) ? 0 : 255; // clip to 8bit +} + +static void GradientPredictDirect(const uint8_t* const row, + const uint8_t* const top, + uint8_t* const out, int length) { + const int max_pos = length & ~7; + int i; + const __m128i zero = _mm_setzero_si128(); + for (i = 0; i < max_pos; i += 8) { + const __m128i A0 = _mm_loadl_epi64((const __m128i*)&row[i - 1]); + const __m128i B0 = _mm_loadl_epi64((const __m128i*)&top[i]); + const __m128i C0 = _mm_loadl_epi64((const __m128i*)&top[i - 1]); + const __m128i D = _mm_loadl_epi64((const __m128i*)&row[i]); + const __m128i A1 = _mm_unpacklo_epi8(A0, zero); + const __m128i B1 = _mm_unpacklo_epi8(B0, zero); + const __m128i C1 = _mm_unpacklo_epi8(C0, zero); + const __m128i E = _mm_add_epi16(A1, B1); + const __m128i F = _mm_sub_epi16(E, C1); + const __m128i G = _mm_packus_epi16(F, zero); + const __m128i H = _mm_sub_epi8(D, G); + _mm_storel_epi64((__m128i*)(out + i), H); + } + for (; i < length; ++i) { + out[i] = row[i] - GradientPredictorC(row[i - 1], top[i], top[i - 1]); + } +} + +static WEBP_INLINE void DoGradientFilter(const uint8_t* in, + int width, int height, int stride, + int row, int num_rows, + uint8_t* out) { + const size_t start_offset = row * stride; + const int last_row = row + num_rows; + SANITY_CHECK(in, out); + in += start_offset; + out += start_offset; + + // left prediction for top scan-line + if (row == 0) { + out[0] = in[0]; + PredictLineLeft(in + 1, out + 1, width - 1); + row = 1; + in += stride; + out += stride; + } + + // Filter line-by-line. + while (row < last_row) { + out[0] = in[0] - in[-stride]; + GradientPredictDirect(in + 1, in + 1 - stride, out + 1, width - 1); + ++row; + in += stride; + out += stride; + } +} + +#undef SANITY_CHECK + +//------------------------------------------------------------------------------ + +static void HorizontalFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoHorizontalFilter(data, width, height, stride, 0, height, filtered_data); +} + +static void VerticalFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoVerticalFilter(data, width, height, stride, 0, height, filtered_data); +} + +static void GradientFilter(const uint8_t* data, int width, int height, + int stride, uint8_t* filtered_data) { + DoGradientFilter(data, width, height, stride, 0, height, filtered_data); +} + +//------------------------------------------------------------------------------ +// Inverse transforms + +static void HorizontalUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + int i; + __m128i last; + out[0] = in[0] + (prev == NULL ? 0 : prev[0]); + if (width <= 1) return; + last = _mm_set_epi32(0, 0, 0, out[0]); + for (i = 1; i + 8 <= width; i += 8) { + const __m128i A0 = _mm_loadl_epi64((const __m128i*)(in + i)); + const __m128i A1 = _mm_add_epi8(A0, last); + const __m128i A2 = _mm_slli_si128(A1, 1); + const __m128i A3 = _mm_add_epi8(A1, A2); + const __m128i A4 = _mm_slli_si128(A3, 2); + const __m128i A5 = _mm_add_epi8(A3, A4); + const __m128i A6 = _mm_slli_si128(A5, 4); + const __m128i A7 = _mm_add_epi8(A5, A6); + _mm_storel_epi64((__m128i*)(out + i), A7); + last = _mm_srli_epi64(A7, 56); + } + for (; i < width; ++i) out[i] = in[i] + out[i - 1]; +} + +static void VerticalUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + if (prev == NULL) { + HorizontalUnfilter(NULL, in, out, width); + } else { + int i; + const int max_pos = width & ~31; + assert(width >= 0); + for (i = 0; i < max_pos; i += 32) { + const __m128i A0 = _mm_loadu_si128((const __m128i*)&in[i + 0]); + const __m128i A1 = _mm_loadu_si128((const __m128i*)&in[i + 16]); + const __m128i B0 = _mm_loadu_si128((const __m128i*)&prev[i + 0]); + const __m128i B1 = _mm_loadu_si128((const __m128i*)&prev[i + 16]); + const __m128i C0 = _mm_add_epi8(A0, B0); + const __m128i C1 = _mm_add_epi8(A1, B1); + _mm_storeu_si128((__m128i*)&out[i + 0], C0); + _mm_storeu_si128((__m128i*)&out[i + 16], C1); + } + for (; i < width; ++i) out[i] = in[i] + prev[i]; + } +} + +static void GradientPredictInverse(const uint8_t* const in, + const uint8_t* const top, + uint8_t* const row, int length) { + if (length > 0) { + int i; + const int max_pos = length & ~7; + const __m128i zero = _mm_setzero_si128(); + __m128i A = _mm_set_epi32(0, 0, 0, row[-1]); // left sample + for (i = 0; i < max_pos; i += 8) { + const __m128i tmp0 = _mm_loadl_epi64((const __m128i*)&top[i]); + const __m128i tmp1 = _mm_loadl_epi64((const __m128i*)&top[i - 1]); + const __m128i B = _mm_unpacklo_epi8(tmp0, zero); + const __m128i C = _mm_unpacklo_epi8(tmp1, zero); + const __m128i D = _mm_loadl_epi64((const __m128i*)&in[i]); // base input + const __m128i E = _mm_sub_epi16(B, C); // unclipped gradient basis B - C + __m128i out = zero; // accumulator for output + __m128i mask_hi = _mm_set_epi32(0, 0, 0, 0xff); + int k = 8; + while (1) { + const __m128i tmp3 = _mm_add_epi16(A, E); // delta = A + B - C + const __m128i tmp4 = _mm_packus_epi16(tmp3, zero); // saturate delta + const __m128i tmp5 = _mm_add_epi8(tmp4, D); // add to in[] + A = _mm_and_si128(tmp5, mask_hi); // 1-complement clip + out = _mm_or_si128(out, A); // accumulate output + if (--k == 0) break; + A = _mm_slli_si128(A, 1); // rotate left sample + mask_hi = _mm_slli_si128(mask_hi, 1); // rotate mask + A = _mm_unpacklo_epi8(A, zero); // convert 8b->16b + } + A = _mm_srli_si128(A, 7); // prepare left sample for next iteration + _mm_storel_epi64((__m128i*)&row[i], out); + } + for (; i < length; ++i) { + row[i] = in[i] + GradientPredictorC(row[i - 1], top[i], top[i - 1]); + } + } +} + +static void GradientUnfilter(const uint8_t* prev, const uint8_t* in, + uint8_t* out, int width) { + if (prev == NULL) { + HorizontalUnfilter(NULL, in, out, width); + } else { + out[0] = in[0] + prev[0]; // predict from above + GradientPredictInverse(in + 1, prev + 1, out + 1, width - 1); + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8FiltersInitSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8FiltersInitSSE2(void) { + WebPUnfilters[WEBP_FILTER_HORIZONTAL] = HorizontalUnfilter; + WebPUnfilters[WEBP_FILTER_VERTICAL] = VerticalUnfilter; + WebPUnfilters[WEBP_FILTER_GRADIENT] = GradientUnfilter; + + WebPFilters[WEBP_FILTER_HORIZONTAL] = HorizontalFilter; + WebPFilters[WEBP_FILTER_VERTICAL] = VerticalFilter; + WebPFilters[WEBP_FILTER_GRADIENT] = GradientFilter; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(VP8FiltersInitSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/thirdparty/libwebp/dsp/lossless.c b/thirdparty/libwebp/dsp/lossless.c new file mode 100644 index 0000000000..af913efccb --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless.c @@ -0,0 +1,633 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// Authors: Vikas Arora (vikaas.arora@gmail.com) +// Jyrki Alakuijala (jyrki@google.com) +// Urvang Joshi (urvang@google.com) + +#include "./dsp.h" + +#include <math.h> +#include <stdlib.h> +#include "../dec/vp8li.h" +#include "../utils/endian_inl.h" +#include "./lossless.h" + +#define MAX_DIFF_COST (1e30f) + +//------------------------------------------------------------------------------ +// Image transforms. + +// In-place sum of each component with mod 256. +static WEBP_INLINE void AddPixelsEq(uint32_t* a, uint32_t b) { + *a = VP8LAddPixels(*a, b); +} + +static WEBP_INLINE uint32_t Average2(uint32_t a0, uint32_t a1) { + return (((a0 ^ a1) & 0xfefefefeu) >> 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 ((uint32_t)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 ((uint32_t)a << 24) | (r << 16) | (g << 8) | b; +} + +// 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; +} + +//------------------------------------------------------------------------------ +// 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; +} + +//------------------------------------------------------------------------------ + +// 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 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) { + const uint32_t pred2 = Predictor2(data[-1], data - width); + const uint32_t* pred_mode_src = pred_mode_base; + VP8LPredictorFunc pred_func; + int x = 1; + int t = 1; + // First pixel follows the T (mode=2) mode. + AddPixelsEq(data, pred2); + // .. the rest: + 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); + } + } + data += width; + ++y; + if ((y & mask) == 0) { // Use the same mask, since tiles are squares. + pred_mode_base += tiles_per_row; + } + } + } +} + +// Add green to blue and red channels (i.e. perform the inverse transform of +// 'subtract 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[i] = (argb & 0xff00ff00u) | red_blue; + } +} + +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, + 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; +} + +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; + data[i] = (argb & 0xff00ff00u) | (new_red << 16) | (new_blue); + } +} + +// 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 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 = + transform->data_ + (y >> transform->bits_) * tiles_per_row; + + while (y < y_end) { + const uint32_t* pred = pred_row; + 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; + } + ++y; + if ((y & mask) == 0) pred_row += tiles_per_row; + } +} + +// Separate out pixels packed together using pixel-bundling. +// 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: + 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. + 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) * width; + 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); +} + +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++; + *dst++ = (argb >> 16) & 0xff; + *dst++ = (argb >> 8) & 0xff; + *dst++ = (argb >> 0) & 0xff; + } +} + +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++; + *dst++ = (argb >> 16) & 0xff; + *dst++ = (argb >> 8) & 0xff; + *dst++ = (argb >> 0) & 0xff; + *dst++ = (argb >> 24) & 0xff; + } +} + +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++; + 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 + } +} + +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++; + 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 + } +} + +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++; + *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) { + const uint32_t argb = *src++; + +#if !defined(WORDS_BIGENDIAN) +#if !defined(WEBP_REFERENCE_IMPLEMENTATION) + WebPUint32ToMem(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)); + } +} + +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: + VP8LConvertBGRAToRGB(in_data, num_pixels, rgba); + break; + case MODE_RGBA: + VP8LConvertBGRAToRGBA(in_data, num_pixels, rgba); + break; + case MODE_rgbA: + VP8LConvertBGRAToRGBA(in_data, num_pixels, rgba); + WebPApplyAlphaMultiply(rgba, 0, num_pixels, 1, 0); + break; + case MODE_BGR: + VP8LConvertBGRAToBGR(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: + VP8LConvertBGRAToRGBA4444(in_data, num_pixels, rgba); + break; + case MODE_rgbA_4444: + VP8LConvertBGRAToRGBA4444(in_data, num_pixels, rgba); + WebPApplyAlphaMultiply4444(rgba, num_pixels, 1, 0); + break; + case MODE_RGB_565: + VP8LConvertBGRAToRGB565(in_data, num_pixels, rgba); + break; + default: + assert(0); // Code flow should not reach here. + } +} + +//------------------------------------------------------------------------------ + +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/thirdparty/libwebp/dsp/lossless.h b/thirdparty/libwebp/dsp/lossless.h new file mode 100644 index 0000000000..9f0d7a25b7 --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless.h @@ -0,0 +1,372 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// Authors: Vikas Arora (vikaas.arora@gmail.com) +// Jyrki Alakuijala (jyrki@google.com) + +#ifndef WEBP_DSP_LOSSLESS_H_ +#define WEBP_DSP_LOSSLESS_H_ + +#include "../webp/types.h" +#include "../webp/decode.h" + +#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 + +//------------------------------------------------------------------------------ +// 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. + +// 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); + +// 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, int near_lossless, int exact, + int used_subtract_green); + +void VP8LColorSpaceTransform(int width, int height, int bits, int quality, + uint32_t* const argb, uint32_t* image); + +//------------------------------------------------------------------------------ +// 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; +} + +// Converts near lossless quality into max number of bits shaved off. +static WEBP_INLINE int VP8LNearLosslessBits(int near_lossless_quality) { + // 100 -> 0 + // 80..99 -> 1 + // 60..79 -> 2 + // 40..59 -> 3 + // 20..39 -> 4 + // 0..19 -> 5 + return 5 - near_lossless_quality / 20; +} + +// ----------------------------------------------------------------------------- +// Faster logarithm for integers. Small values use a look-up table. + +// The threshold till approximate version of log_2 can be used. +// Practically, we can get rid of the call to log() as the two values match to +// very high degree (the ratio of these two is 0.99999x). +// Keeping a high threshold for now. +#define APPROX_LOG_WITH_CORRECTION_MAX 65536 +#define APPROX_LOG_MAX 4096 +#define LOG_2_RECIPROCAL 1.44269504088896338700465094007086 +#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(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); +typedef float (*VP8LCombinedShannonEntropyFunc)(const int X[256], + const int Y[256]); + +extern VP8LCostFunc VP8LExtraCost; +extern VP8LCostCombinedFunc VP8LExtraCostCombined; +extern VP8LCombinedShannonEntropyFunc VP8LCombinedShannonEntropy; + +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 (*VP8LCostCombinedCountFunc)(const uint32_t* X, + const uint32_t* Y, int length); + +extern VP8LCostCombinedCountFunc VP8LHuffmanCostCombinedCount; + +typedef struct { // small struct to hold bit entropy results + double entropy; // entropy + uint32_t sum; // sum of the population + int nonzeros; // number of non-zero elements in the population + uint32_t max_val; // maximum value in the population + uint32_t nonzero_code; // index of the last non-zero in the population +} VP8LBitEntropy; + +void VP8LBitEntropyInit(VP8LBitEntropy* const entropy); + +// Get the combined symbol bit entropy and Huffman cost stats for the +// distributions 'X' and 'Y'. Those results can then be refined according to +// codec specific heuristics. +void VP8LGetCombinedEntropyUnrefined(const uint32_t* const X, + const uint32_t* const Y, int length, + VP8LBitEntropy* const bit_entropy, + VP8LStreaks* const stats); +// Get the entropy for the distribution 'X'. +void VP8LGetEntropyUnrefined(const uint32_t* const X, int length, + VP8LBitEntropy* const bit_entropy, + VP8LStreaks* const stats); + +void VP8LBitsEntropyUnrefined(const uint32_t* const array, int n, + VP8LBitEntropy* const entropy); + +typedef void (*GetEntropyUnrefinedHelperFunc)(uint32_t val, int i, + uint32_t* const val_prev, + int* const i_prev, + VP8LBitEntropy* const bit_entropy, + VP8LStreaks* const stats); +// Internal function used by VP8LGet*EntropyUnrefined. +extern GetEntropyUnrefinedHelperFunc VP8LGetEntropyUnrefinedHelper; + +typedef void (*VP8LHistogramAddFunc)(const VP8LHistogram* const a, + const VP8LHistogram* const b, + VP8LHistogram* const out); +extern VP8LHistogramAddFunc VP8LHistogramAdd; + +// ----------------------------------------------------------------------------- +// PrefixEncode() + +typedef int (*VP8LVectorMismatchFunc)(const uint32_t* const array1, + const uint32_t* const array2, int length); +// Returns the first index where array1 and array2 are different. +extern VP8LVectorMismatchFunc VP8LVectorMismatch; + +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); + } +} + +// Sum of each component, mod 256. +static WEBP_INLINE uint32_t VP8LAddPixels(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); + return (alpha_and_green & 0xff00ff00u) | (red_and_blue & 0x00ff00ffu); +} + +// Difference of each component, 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); +} + +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); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // WEBP_DSP_LOSSLESS_H_ diff --git a/thirdparty/libwebp/dsp/lossless_enc.c b/thirdparty/libwebp/dsp/lossless_enc.c new file mode 100644 index 0000000000..256f6f5f8b --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_enc.c @@ -0,0 +1,1439 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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 transform methods for lossless encoder. +// +// Authors: Vikas Arora (vikaas.arora@gmail.com) +// Jyrki Alakuijala (jyrki@google.com) +// Urvang Joshi (urvang@google.com) + +#include "./dsp.h" + +#include <math.h> +#include <stdlib.h> +#include "../dec/vp8li.h" +#include "../utils/endian_inl.h" +#include "./lossless.h" +#include "./yuv.h" + +#define MAX_DIFF_COST (1e30f) + +static const int kPredLowEffort = 11; +static const uint32_t kMaskAlpha = 0xff000000; + +// lookup table for small values of log2(int) +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 +}; + +const float kSLog2Table[LOG_LOOKUP_IDX_MAX] = { + 0.00000000f, 0.00000000f, 2.00000000f, 4.75488750f, + 8.00000000f, 11.60964047f, 15.50977500f, 19.65148445f, + 24.00000000f, 28.52932501f, 33.21928095f, 38.05374781f, + 43.01955001f, 48.10571634f, 53.30296891f, 58.60335893f, + 64.00000000f, 69.48686830f, 75.05865003f, 80.71062276f, + 86.43856190f, 92.23866588f, 98.10749561f, 104.04192499f, + 110.03910002f, 116.09640474f, 122.21143267f, 128.38196256f, + 134.60593782f, 140.88144886f, 147.20671787f, 153.58008562f, + 160.00000000f, 166.46500594f, 172.97373660f, 179.52490559f, + 186.11730005f, 192.74977453f, 199.42124551f, 206.13068654f, + 212.87712380f, 219.65963219f, 226.47733176f, 233.32938445f, + 240.21499122f, 247.13338933f, 254.08384998f, 261.06567603f, + 268.07820003f, 275.12078236f, 282.19280949f, 289.29369244f, + 296.42286534f, 303.57978409f, 310.76392512f, 317.97478424f, + 325.21187564f, 332.47473081f, 339.76289772f, 347.07593991f, + 354.41343574f, 361.77497759f, 369.16017124f, 376.56863518f, + 384.00000000f, 391.45390785f, 398.93001188f, 406.42797576f, + 413.94747321f, 421.48818752f, 429.04981119f, 436.63204548f, + 444.23460010f, 451.85719280f, 459.49954906f, 467.16140179f, + 474.84249102f, 482.54256363f, 490.26137307f, 497.99867911f, + 505.75424759f, 513.52785023f, 521.31926438f, 529.12827280f, + 536.95466351f, 544.79822957f, 552.65876890f, 560.53608414f, + 568.42998244f, 576.34027536f, 584.26677867f, 592.20931226f, + 600.16769996f, 608.14176943f, 616.13135206f, 624.13628279f, + 632.15640007f, 640.19154569f, 648.24156472f, 656.30630539f, + 664.38561898f, 672.47935976f, 680.58738488f, 688.70955430f, + 696.84573069f, 704.99577935f, 713.15956818f, 721.33696754f, + 729.52785023f, 737.73209140f, 745.94956849f, 754.18016116f, + 762.42375127f, 770.68022275f, 778.94946161f, 787.23135586f, + 795.52579543f, 803.83267219f, 812.15187982f, 820.48331383f, + 828.82687147f, 837.18245171f, 845.54995518f, 853.92928416f, + 862.32034249f, 870.72303558f, 879.13727036f, 887.56295522f, + 896.00000000f, 904.44831595f, 912.90781569f, 921.37841320f, + 929.86002376f, 938.35256392f, 946.85595152f, 955.37010560f, + 963.89494641f, 972.43039537f, 980.97637504f, 989.53280911f, + 998.09962237f, 1006.67674069f, 1015.26409097f, 1023.86160116f, + 1032.46920021f, 1041.08681805f, 1049.71438560f, 1058.35183469f, + 1066.99909811f, 1075.65610955f, 1084.32280357f, 1092.99911564f, + 1101.68498204f, 1110.38033993f, 1119.08512727f, 1127.79928282f, + 1136.52274614f, 1145.25545758f, 1153.99735821f, 1162.74838989f, + 1171.50849518f, 1180.27761738f, 1189.05570047f, 1197.84268914f, + 1206.63852876f, 1215.44316535f, 1224.25654560f, 1233.07861684f, + 1241.90932703f, 1250.74862473f, 1259.59645914f, 1268.45278005f, + 1277.31753781f, 1286.19068338f, 1295.07216828f, 1303.96194457f, + 1312.85996488f, 1321.76618236f, 1330.68055071f, 1339.60302413f, + 1348.53355734f, 1357.47210556f, 1366.41862452f, 1375.37307041f, + 1384.33539991f, 1393.30557020f, 1402.28353887f, 1411.26926400f, + 1420.26270412f, 1429.26381818f, 1438.27256558f, 1447.28890615f, + 1456.31280014f, 1465.34420819f, 1474.38309138f, 1483.42941118f, + 1492.48312945f, 1501.54420843f, 1510.61261078f, 1519.68829949f, + 1528.77123795f, 1537.86138993f, 1546.95871952f, 1556.06319119f, + 1565.17476976f, 1574.29342040f, 1583.41910860f, 1592.55180020f, + 1601.69146137f, 1610.83805860f, 1619.99155871f, 1629.15192882f, + 1638.31913637f, 1647.49314911f, 1656.67393509f, 1665.86146266f, + 1675.05570047f, 1684.25661744f, 1693.46418280f, 1702.67836605f, + 1711.89913698f, 1721.12646563f, 1730.36032233f, 1739.60067768f, + 1748.84750254f, 1758.10076802f, 1767.36044551f, 1776.62650662f, + 1785.89892323f, 1795.17766747f, 1804.46271172f, 1813.75402857f, + 1823.05159087f, 1832.35537170f, 1841.66534438f, 1850.98148244f, + 1860.30375965f, 1869.63214999f, 1878.96662767f, 1888.30716711f, + 1897.65374295f, 1907.00633003f, 1916.36490342f, 1925.72943838f, + 1935.09991037f, 1944.47629506f, 1953.85856831f, 1963.24670620f, + 1972.64068498f, 1982.04048108f, 1991.44607117f, 2000.85743204f, + 2010.27454072f, 2019.69737440f, 2029.12591044f, 2038.56012640f +}; + +const VP8LPrefixCode kPrefixEncodeCode[PREFIX_LOOKUP_IDX_MAX] = { + { 0, 0}, { 0, 0}, { 1, 0}, { 2, 0}, { 3, 0}, { 4, 1}, { 4, 1}, { 5, 1}, + { 5, 1}, { 6, 2}, { 6, 2}, { 6, 2}, { 6, 2}, { 7, 2}, { 7, 2}, { 7, 2}, + { 7, 2}, { 8, 3}, { 8, 3}, { 8, 3}, { 8, 3}, { 8, 3}, { 8, 3}, { 8, 3}, + { 8, 3}, { 9, 3}, { 9, 3}, { 9, 3}, { 9, 3}, { 9, 3}, { 9, 3}, { 9, 3}, + { 9, 3}, {10, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4}, + {10, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4}, {10, 4}, + {10, 4}, {11, 4}, {11, 4}, {11, 4}, {11, 4}, {11, 4}, {11, 4}, {11, 4}, + {11, 4}, {11, 4}, {11, 4}, {11, 4}, {11, 4}, {11, 4}, {11, 4}, {11, 4}, + {11, 4}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, + {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, + {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, + {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, {12, 5}, + {12, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, + {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, + {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, + {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, {13, 5}, + {13, 5}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, + {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, + {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, + {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, + {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, + {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, + {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, + {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, {14, 6}, + {14, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, + {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, + {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, + {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, + {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, + {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, + {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, + {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, {15, 6}, + {15, 6}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, {16, 7}, + {16, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, + {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, {17, 7}, +}; + +const uint8_t kPrefixEncodeExtraBitsValue[PREFIX_LOOKUP_IDX_MAX] = { + 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 2, 3, 0, 1, 2, 3, + 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 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, + 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, + 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, 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, 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, + 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, + 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, + 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, + 127, + 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, + 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, + 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, + 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126 +}; + +static float FastSLog2Slow(uint32_t v) { + assert(v >= LOG_LOOKUP_IDX_MAX); + if (v < APPROX_LOG_WITH_CORRECTION_MAX) { + int log_cnt = 0; + uint32_t y = 1; + int correction = 0; + const float v_f = (float)v; + const uint32_t orig_v = v; + do { + ++log_cnt; + v = v >> 1; + y = y << 1; + } while (v >= LOG_LOOKUP_IDX_MAX); + // vf = (2^log_cnt) * Xf; where y = 2^log_cnt and Xf < 256 + // Xf = floor(Xf) * (1 + (v % y) / v) + // log2(Xf) = log2(floor(Xf)) + log2(1 + (v % y) / v) + // The correction factor: log(1 + d) ~ d; for very small d values, so + // log2(1 + (v % y) / v) ~ LOG_2_RECIPROCAL * (v % y)/v + // LOG_2_RECIPROCAL ~ 23/16 + correction = (23 * (orig_v & (y - 1))) >> 4; + return v_f * (kLog2Table[v] + log_cnt) + correction; + } else { + return (float)(LOG_2_RECIPROCAL * v * log((double)v)); + } +} + +static float FastLog2Slow(uint32_t v) { + assert(v >= LOG_LOOKUP_IDX_MAX); + if (v < APPROX_LOG_WITH_CORRECTION_MAX) { + int log_cnt = 0; + uint32_t y = 1; + const uint32_t orig_v = v; + double log_2; + do { + ++log_cnt; + v = v >> 1; + y = y << 1; + } while (v >= LOG_LOOKUP_IDX_MAX); + log_2 = kLog2Table[v] + log_cnt; + if (orig_v >= APPROX_LOG_MAX) { + // Since the division is still expensive, add this correction factor only + // for large values of 'v'. + const int correction = (23 * (orig_v & (y - 1))) >> 4; + log_2 += (double)correction / orig_v; + } + return (float)log_2; + } else { + return (float)(LOG_2_RECIPROCAL * log((double)v)); + } +} + +// Mostly used to reduce code size + readability +static WEBP_INLINE int GetMin(int a, int b) { return (a > b) ? b : a; } +static WEBP_INLINE int GetMax(int a, int b) { return (a < b) ? b : a; } + +//------------------------------------------------------------------------------ +// Methods to calculate Entropy (Shannon). + +static float PredictionCostSpatial(const int counts[256], int weight_0, + double exp_val) { + const int significant_symbols = 256 >> 4; + 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 combined Shanon's entropy for distribution {X} and {X+Y} +static float CombinedShannonEntropy(const int X[256], const int Y[256]) { + int i; + double retval = 0.; + int sumX = 0, sumXY = 0; + for (i = 0; i < 256; ++i) { + const int x = X[i]; + if (x != 0) { + const int xy = x + Y[i]; + sumX += x; + retval -= VP8LFastSLog2(x); + sumXY += xy; + retval -= VP8LFastSLog2(xy); + } else if (Y[i] != 0) { + sumXY += Y[i]; + retval -= VP8LFastSLog2(Y[i]); + } + } + retval += VP8LFastSLog2(sumX) + VP8LFastSLog2(sumXY); + return (float)retval; +} + +static float PredictionCostSpatialHistogram(const int accumulated[4][256], + const int tile[4][256]) { + int i; + double retval = 0; + for (i = 0; i < 4; ++i) { + const double kExpValue = 0.94; + retval += PredictionCostSpatial(tile[i], 1, kExpValue); + retval += VP8LCombinedShannonEntropy(tile[i], accumulated[i]); + } + return (float)retval; +} + +void VP8LBitEntropyInit(VP8LBitEntropy* const entropy) { + entropy->entropy = 0.; + entropy->sum = 0; + entropy->nonzeros = 0; + entropy->max_val = 0; + entropy->nonzero_code = VP8L_NON_TRIVIAL_SYM; +} + +void VP8LBitsEntropyUnrefined(const uint32_t* const array, int n, + VP8LBitEntropy* const entropy) { + int i; + + VP8LBitEntropyInit(entropy); + + for (i = 0; i < n; ++i) { + if (array[i] != 0) { + entropy->sum += array[i]; + entropy->nonzero_code = i; + ++entropy->nonzeros; + entropy->entropy -= VP8LFastSLog2(array[i]); + if (entropy->max_val < array[i]) { + entropy->max_val = array[i]; + } + } + } + entropy->entropy += VP8LFastSLog2(entropy->sum); +} + +static WEBP_INLINE void GetEntropyUnrefinedHelper( + uint32_t val, int i, uint32_t* const val_prev, int* const i_prev, + VP8LBitEntropy* const bit_entropy, VP8LStreaks* const stats) { + const int streak = i - *i_prev; + + // Gather info for the bit entropy. + if (*val_prev != 0) { + bit_entropy->sum += (*val_prev) * streak; + bit_entropy->nonzeros += streak; + bit_entropy->nonzero_code = *i_prev; + bit_entropy->entropy -= VP8LFastSLog2(*val_prev) * streak; + if (bit_entropy->max_val < *val_prev) { + bit_entropy->max_val = *val_prev; + } + } + + // Gather info for the Huffman cost. + stats->counts[*val_prev != 0] += (streak > 3); + stats->streaks[*val_prev != 0][(streak > 3)] += streak; + + *val_prev = val; + *i_prev = i; +} + +void VP8LGetEntropyUnrefined(const uint32_t* const X, int length, + VP8LBitEntropy* const bit_entropy, + VP8LStreaks* const stats) { + int i; + int i_prev = 0; + uint32_t x_prev = X[0]; + + memset(stats, 0, sizeof(*stats)); + VP8LBitEntropyInit(bit_entropy); + + for (i = 1; i < length; ++i) { + const uint32_t x = X[i]; + if (x != x_prev) { + VP8LGetEntropyUnrefinedHelper(x, i, &x_prev, &i_prev, bit_entropy, stats); + } + } + VP8LGetEntropyUnrefinedHelper(0, i, &x_prev, &i_prev, bit_entropy, stats); + + bit_entropy->entropy += VP8LFastSLog2(bit_entropy->sum); +} + +void VP8LGetCombinedEntropyUnrefined(const uint32_t* const X, + const uint32_t* const Y, int length, + VP8LBitEntropy* const bit_entropy, + VP8LStreaks* const stats) { + int i = 1; + int i_prev = 0; + uint32_t xy_prev = X[0] + Y[0]; + + memset(stats, 0, sizeof(*stats)); + VP8LBitEntropyInit(bit_entropy); + + for (i = 1; i < length; ++i) { + const uint32_t xy = X[i] + Y[i]; + if (xy != xy_prev) { + VP8LGetEntropyUnrefinedHelper(xy, i, &xy_prev, &i_prev, bit_entropy, + stats); + } + } + VP8LGetEntropyUnrefinedHelper(0, i, &xy_prev, &i_prev, bit_entropy, stats); + + bit_entropy->entropy += VP8LFastSLog2(bit_entropy->sum); +} + +static WEBP_INLINE void UpdateHisto(int histo_argb[4][256], uint32_t argb) { + ++histo_argb[0][argb >> 24]; + ++histo_argb[1][(argb >> 16) & 0xff]; + ++histo_argb[2][(argb >> 8) & 0xff]; + ++histo_argb[3][argb & 0xff]; +} + +//------------------------------------------------------------------------------ + +static WEBP_INLINE uint32_t Predict(VP8LPredictorFunc pred_func, + int x, int y, + const uint32_t* current_row, + const uint32_t* upper_row) { + if (y == 0) { + return (x == 0) ? ARGB_BLACK : current_row[x - 1]; // Left. + } else if (x == 0) { + return upper_row[x]; // Top. + } else { + return pred_func(current_row[x - 1], upper_row + x); + } +} + +static int MaxDiffBetweenPixels(uint32_t p1, uint32_t p2) { + const int diff_a = abs((int)(p1 >> 24) - (int)(p2 >> 24)); + const int diff_r = abs((int)((p1 >> 16) & 0xff) - (int)((p2 >> 16) & 0xff)); + const int diff_g = abs((int)((p1 >> 8) & 0xff) - (int)((p2 >> 8) & 0xff)); + const int diff_b = abs((int)(p1 & 0xff) - (int)(p2 & 0xff)); + return GetMax(GetMax(diff_a, diff_r), GetMax(diff_g, diff_b)); +} + +static int MaxDiffAroundPixel(uint32_t current, uint32_t up, uint32_t down, + uint32_t left, uint32_t right) { + const int diff_up = MaxDiffBetweenPixels(current, up); + const int diff_down = MaxDiffBetweenPixels(current, down); + const int diff_left = MaxDiffBetweenPixels(current, left); + const int diff_right = MaxDiffBetweenPixels(current, right); + return GetMax(GetMax(diff_up, diff_down), GetMax(diff_left, diff_right)); +} + +static uint32_t AddGreenToBlueAndRed(uint32_t argb) { + const uint32_t green = (argb >> 8) & 0xff; + uint32_t red_blue = argb & 0x00ff00ffu; + red_blue += (green << 16) | green; + red_blue &= 0x00ff00ffu; + return (argb & 0xff00ff00u) | red_blue; +} + +static void MaxDiffsForRow(int width, int stride, const uint32_t* const argb, + uint8_t* const max_diffs, int used_subtract_green) { + uint32_t current, up, down, left, right; + int x; + if (width <= 2) return; + current = argb[0]; + right = argb[1]; + if (used_subtract_green) { + current = AddGreenToBlueAndRed(current); + right = AddGreenToBlueAndRed(right); + } + // max_diffs[0] and max_diffs[width - 1] are never used. + for (x = 1; x < width - 1; ++x) { + up = argb[-stride + x]; + down = argb[stride + x]; + left = current; + current = right; + right = argb[x + 1]; + if (used_subtract_green) { + up = AddGreenToBlueAndRed(up); + down = AddGreenToBlueAndRed(down); + right = AddGreenToBlueAndRed(right); + } + max_diffs[x] = MaxDiffAroundPixel(current, up, down, left, right); + } +} + +// Quantize the difference between the actual component value and its prediction +// to a multiple of quantization, working modulo 256, taking care not to cross +// a boundary (inclusive upper limit). +static uint8_t NearLosslessComponent(uint8_t value, uint8_t predict, + uint8_t boundary, int quantization) { + const int residual = (value - predict) & 0xff; + const int boundary_residual = (boundary - predict) & 0xff; + const int lower = residual & ~(quantization - 1); + const int upper = lower + quantization; + // Resolve ties towards a value closer to the prediction (i.e. towards lower + // if value comes after prediction and towards upper otherwise). + const int bias = ((boundary - value) & 0xff) < boundary_residual; + if (residual - lower < upper - residual + bias) { + // lower is closer to residual than upper. + if (residual > boundary_residual && lower <= boundary_residual) { + // Halve quantization step to avoid crossing boundary. This midpoint is + // on the same side of boundary as residual because midpoint >= residual + // (since lower is closer than upper) and residual is above the boundary. + return lower + (quantization >> 1); + } + return lower; + } else { + // upper is closer to residual than lower. + if (residual <= boundary_residual && upper > boundary_residual) { + // Halve quantization step to avoid crossing boundary. This midpoint is + // on the same side of boundary as residual because midpoint <= residual + // (since upper is closer than lower) and residual is below the boundary. + return lower + (quantization >> 1); + } + return upper & 0xff; + } +} + +// Quantize every component of the difference between the actual pixel value and +// its prediction to a multiple of a quantization (a power of 2, not larger than +// max_quantization which is a power of 2, smaller than max_diff). Take care if +// value and predict have undergone subtract green, which means that red and +// blue are represented as offsets from green. +static uint32_t NearLossless(uint32_t value, uint32_t predict, + int max_quantization, int max_diff, + int used_subtract_green) { + int quantization; + uint8_t new_green = 0; + uint8_t green_diff = 0; + uint8_t a, r, g, b; + if (max_diff <= 2) { + return VP8LSubPixels(value, predict); + } + quantization = max_quantization; + while (quantization >= max_diff) { + quantization >>= 1; + } + if ((value >> 24) == 0 || (value >> 24) == 0xff) { + // Preserve transparency of fully transparent or fully opaque pixels. + a = ((value >> 24) - (predict >> 24)) & 0xff; + } else { + a = NearLosslessComponent(value >> 24, predict >> 24, 0xff, quantization); + } + g = NearLosslessComponent((value >> 8) & 0xff, (predict >> 8) & 0xff, 0xff, + quantization); + if (used_subtract_green) { + // The green offset will be added to red and blue components during decoding + // to obtain the actual red and blue values. + new_green = ((predict >> 8) + g) & 0xff; + // The amount by which green has been adjusted during quantization. It is + // subtracted from red and blue for compensation, to avoid accumulating two + // quantization errors in them. + green_diff = (new_green - (value >> 8)) & 0xff; + } + r = NearLosslessComponent(((value >> 16) - green_diff) & 0xff, + (predict >> 16) & 0xff, 0xff - new_green, + quantization); + b = NearLosslessComponent((value - green_diff) & 0xff, predict & 0xff, + 0xff - new_green, quantization); + return ((uint32_t)a << 24) | ((uint32_t)r << 16) | ((uint32_t)g << 8) | b; +} + +// Returns the difference between the pixel and its prediction. In case of a +// lossy encoding, updates the source image to avoid propagating the deviation +// further to pixels which depend on the current pixel for their predictions. +static WEBP_INLINE uint32_t GetResidual(int width, int height, + uint32_t* const upper_row, + uint32_t* const current_row, + const uint8_t* const max_diffs, + int mode, VP8LPredictorFunc pred_func, + int x, int y, int max_quantization, + int exact, int used_subtract_green) { + const uint32_t predict = Predict(pred_func, x, y, current_row, upper_row); + uint32_t residual; + if (max_quantization == 1 || mode == 0 || y == 0 || y == height - 1 || + x == 0 || x == width - 1) { + residual = VP8LSubPixels(current_row[x], predict); + } else { + residual = NearLossless(current_row[x], predict, max_quantization, + max_diffs[x], used_subtract_green); + // Update the source image. + current_row[x] = VP8LAddPixels(predict, residual); + // x is never 0 here so we do not need to update upper_row like below. + } + if (!exact && (current_row[x] & kMaskAlpha) == 0) { + // If alpha is 0, cleanup RGB. We can choose the RGB values of the residual + // for best compression. The prediction of alpha itself can be non-zero and + // must be kept though. We choose RGB of the residual to be 0. + residual &= kMaskAlpha; + // Update the source image. + current_row[x] = predict & ~kMaskAlpha; + // The prediction for the rightmost pixel in a row uses the leftmost pixel + // in that row as its top-right context pixel. Hence if we change the + // leftmost pixel of current_row, the corresponding change must be applied + // to upper_row as well where top-right context is being read from. + if (x == 0 && y != 0) upper_row[width] = current_row[0]; + } + return residual; +} + +// Returns best predictor and updates the accumulated histogram. +// If max_quantization > 1, assumes that near lossless processing will be +// applied, quantizing residuals to multiples of quantization levels up to +// max_quantization (the actual quantization level depends on smoothness near +// the given pixel). +static int GetBestPredictorForTile(int width, int height, + int tile_x, int tile_y, int bits, + int accumulated[4][256], + uint32_t* const argb_scratch, + const uint32_t* const argb, + int max_quantization, + int exact, int used_subtract_green) { + const int kNumPredModes = 14; + const int start_x = tile_x << bits; + const int start_y = tile_y << bits; + const int tile_size = 1 << bits; + const int max_y = GetMin(tile_size, height - start_y); + const int max_x = GetMin(tile_size, width - start_x); + // Whether there exist columns just outside the tile. + const int have_left = (start_x > 0); + const int have_right = (max_x < width - start_x); + // Position and size of the strip covering the tile and adjacent columns if + // they exist. + const int context_start_x = start_x - have_left; + const int context_width = max_x + have_left + have_right; + // The width of upper_row and current_row is one pixel larger than image width + // to allow the top right pixel to point to the leftmost pixel of the next row + // when at the right edge. + uint32_t* upper_row = argb_scratch; + uint32_t* current_row = upper_row + width + 1; + uint8_t* const max_diffs = (uint8_t*)(current_row + width + 1); + float best_diff = MAX_DIFF_COST; + int best_mode = 0; + int mode; + int histo_stack_1[4][256]; + int histo_stack_2[4][256]; + // Need pointers to be able to swap arrays. + int (*histo_argb)[256] = histo_stack_1; + int (*best_histo)[256] = histo_stack_2; + int i, j; + + for (mode = 0; mode < kNumPredModes; ++mode) { + const VP8LPredictorFunc pred_func = VP8LPredictors[mode]; + float cur_diff; + int relative_y; + memset(histo_argb, 0, sizeof(histo_stack_1)); + if (start_y > 0) { + // Read the row above the tile which will become the first upper_row. + // Include a pixel to the left if it exists; include a pixel to the right + // in all cases (wrapping to the leftmost pixel of the next row if it does + // not exist). + memcpy(current_row + context_start_x, + argb + (start_y - 1) * width + context_start_x, + sizeof(*argb) * (max_x + have_left + 1)); + } + for (relative_y = 0; relative_y < max_y; ++relative_y) { + const int y = start_y + relative_y; + int relative_x; + uint32_t* tmp = upper_row; + upper_row = current_row; + current_row = tmp; + // Read current_row. Include a pixel to the left if it exists; include a + // pixel to the right in all cases except at the bottom right corner of + // the image (wrapping to the leftmost pixel of the next row if it does + // not exist in the current row). + memcpy(current_row + context_start_x, + argb + y * width + context_start_x, + sizeof(*argb) * (max_x + have_left + (y + 1 < height))); + if (max_quantization > 1 && y >= 1 && y + 1 < height) { + MaxDiffsForRow(context_width, width, argb + y * width + context_start_x, + max_diffs + context_start_x, used_subtract_green); + } + + for (relative_x = 0; relative_x < max_x; ++relative_x) { + const int x = start_x + relative_x; + UpdateHisto(histo_argb, + GetResidual(width, height, upper_row, current_row, + max_diffs, mode, pred_func, x, y, + max_quantization, exact, used_subtract_green)); + } + } + cur_diff = PredictionCostSpatialHistogram( + (const int (*)[256])accumulated, (const int (*)[256])histo_argb); + if (cur_diff < best_diff) { + int (*tmp)[256] = histo_argb; + histo_argb = best_histo; + best_histo = tmp; + best_diff = cur_diff; + best_mode = mode; + } + } + + for (i = 0; i < 4; i++) { + for (j = 0; j < 256; j++) { + accumulated[i][j] += best_histo[i][j]; + } + } + + return best_mode; +} + +// Converts pixels of the image to residuals with respect to predictions. +// If max_quantization > 1, applies near lossless processing, quantizing +// residuals to multiples of quantization levels up to max_quantization +// (the actual quantization level depends on smoothness near the given pixel). +static void CopyImageWithPrediction(int width, int height, + int bits, uint32_t* const modes, + uint32_t* const argb_scratch, + uint32_t* const argb, + int low_effort, int max_quantization, + int exact, int used_subtract_green) { + const int tiles_per_row = VP8LSubSampleSize(width, bits); + const int mask = (1 << bits) - 1; + // The width of upper_row and current_row is one pixel larger than image width + // to allow the top right pixel to point to the leftmost pixel of the next row + // when at the right edge. + uint32_t* upper_row = argb_scratch; + uint32_t* current_row = upper_row + width + 1; + uint8_t* current_max_diffs = (uint8_t*)(current_row + width + 1); + uint8_t* lower_max_diffs = current_max_diffs + width; + int y; + int mode = 0; + VP8LPredictorFunc pred_func = NULL; + + for (y = 0; y < height; ++y) { + int x; + uint32_t* const tmp32 = upper_row; + upper_row = current_row; + current_row = tmp32; + memcpy(current_row, argb + y * width, + sizeof(*argb) * (width + (y + 1 < height))); + + if (low_effort) { + for (x = 0; x < width; ++x) { + const uint32_t predict = Predict(VP8LPredictors[kPredLowEffort], x, y, + current_row, upper_row); + argb[y * width + x] = VP8LSubPixels(current_row[x], predict); + } + } else { + if (max_quantization > 1) { + // Compute max_diffs for the lower row now, because that needs the + // contents of argb for the current row, which we will overwrite with + // residuals before proceeding with the next row. + uint8_t* const tmp8 = current_max_diffs; + current_max_diffs = lower_max_diffs; + lower_max_diffs = tmp8; + if (y + 2 < height) { + MaxDiffsForRow(width, width, argb + (y + 1) * width, lower_max_diffs, + used_subtract_green); + } + } + for (x = 0; x < width; ++x) { + if ((x & mask) == 0) { + mode = (modes[(y >> bits) * tiles_per_row + (x >> bits)] >> 8) & 0xff; + pred_func = VP8LPredictors[mode]; + } + argb[y * width + x] = GetResidual( + width, height, upper_row, current_row, current_max_diffs, mode, + pred_func, x, y, max_quantization, exact, used_subtract_green); + } + } + } +} + +// Finds the best predictor for each tile, and converts the image to residuals +// with respect to predictions. If near_lossless_quality < 100, applies +// near lossless processing, shaving off more bits of residuals for lower +// qualities. +void VP8LResidualImage(int width, int height, int bits, int low_effort, + uint32_t* const argb, uint32_t* const argb_scratch, + uint32_t* const image, int near_lossless_quality, + int exact, int used_subtract_green) { + const int tiles_per_row = VP8LSubSampleSize(width, bits); + const int tiles_per_col = VP8LSubSampleSize(height, bits); + int tile_y; + int histo[4][256]; + const int max_quantization = 1 << VP8LNearLosslessBits(near_lossless_quality); + if (low_effort) { + int i; + for (i = 0; i < tiles_per_row * tiles_per_col; ++i) { + image[i] = ARGB_BLACK | (kPredLowEffort << 8); + } + } else { + memset(histo, 0, sizeof(histo)); + for (tile_y = 0; tile_y < tiles_per_col; ++tile_y) { + int tile_x; + for (tile_x = 0; tile_x < tiles_per_row; ++tile_x) { + const int pred = GetBestPredictorForTile(width, height, tile_x, tile_y, + bits, histo, argb_scratch, argb, max_quantization, exact, + used_subtract_green); + image[tile_y * tiles_per_row + tile_x] = ARGB_BLACK | (pred << 8); + } + } + } + + CopyImageWithPrediction(width, height, bits, image, argb_scratch, argb, + low_effort, max_quantization, exact, + used_subtract_green); +} + +void VP8LSubtractGreenFromBlueAndRed_C(uint32_t* argb_data, int num_pixels) { + int i; + for (i = 0; i < num_pixels; ++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; + } +} + +static WEBP_INLINE void MultipliersClear(VP8LMultipliers* const 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, + 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( + const VP8LMultipliers* const m) { + return 0xff000000u | + ((uint32_t)(m->red_to_blue_) << 16) | + ((uint32_t)(m->green_to_blue_) << 8) | + m->green_to_red_; +} + +void VP8LTransformColor_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_, red); + new_blue &= 0xff; + data[i] = (argb & 0xff00ff00u) | (new_red << 16) | (new_blue); + } +} + +static WEBP_INLINE uint8_t TransformColorRed(uint8_t green_to_red, + uint32_t argb) { + const uint32_t green = argb >> 8; + uint32_t new_red = argb >> 16; + new_red -= ColorTransformDelta(green_to_red, green); + return (new_red & 0xff); +} + +static WEBP_INLINE uint8_t TransformColorBlue(uint8_t green_to_blue, + uint8_t red_to_blue, + uint32_t argb) { + const uint32_t green = argb >> 8; + const uint32_t red = argb >> 16; + uint8_t new_blue = argb; + new_blue -= ColorTransformDelta(green_to_blue, green); + new_blue -= ColorTransformDelta(red_to_blue, red); + return (new_blue & 0xff); +} + +static float PredictionCostCrossColor(const int accumulated[256], + const int counts[256]) { + // Favor low entropy, locally and globally. + // Favor small absolute values for PredictionCostSpatial + static const double kExpValue = 2.4; + return VP8LCombinedShannonEntropy(counts, accumulated) + + PredictionCostSpatial(counts, 3, kExpValue); +} + +void VP8LCollectColorRedTransforms_C(const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_red, int histo[]) { + while (tile_height-- > 0) { + int x; + for (x = 0; x < tile_width; ++x) { + ++histo[TransformColorRed(green_to_red, argb[x])]; + } + argb += stride; + } +} + +static float GetPredictionCostCrossColorRed( + const uint32_t* argb, int stride, int tile_width, int tile_height, + VP8LMultipliers prev_x, VP8LMultipliers prev_y, int green_to_red, + const int accumulated_red_histo[256]) { + int histo[256] = { 0 }; + float cur_diff; + + VP8LCollectColorRedTransforms(argb, stride, tile_width, tile_height, + green_to_red, histo); + + cur_diff = PredictionCostCrossColor(accumulated_red_histo, histo); + if ((uint8_t)green_to_red == prev_x.green_to_red_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if ((uint8_t)green_to_red == prev_y.green_to_red_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if (green_to_red == 0) { + cur_diff -= 3; + } + return cur_diff; +} + +static void GetBestGreenToRed( + const uint32_t* argb, int stride, int tile_width, int tile_height, + VP8LMultipliers prev_x, VP8LMultipliers prev_y, int quality, + const int accumulated_red_histo[256], VP8LMultipliers* const best_tx) { + const int kMaxIters = 4 + ((7 * quality) >> 8); // in range [4..6] + int green_to_red_best = 0; + int iter, offset; + float best_diff = GetPredictionCostCrossColorRed( + argb, stride, tile_width, tile_height, prev_x, prev_y, + green_to_red_best, accumulated_red_histo); + for (iter = 0; iter < kMaxIters; ++iter) { + // ColorTransformDelta is a 3.5 bit fixed point, so 32 is equal to + // one in color computation. Having initial delta here as 1 is sufficient + // to explore the range of (-2, 2). + const int delta = 32 >> iter; + // Try a negative and a positive delta from the best known value. + for (offset = -delta; offset <= delta; offset += 2 * delta) { + const int green_to_red_cur = offset + green_to_red_best; + const float cur_diff = GetPredictionCostCrossColorRed( + argb, stride, tile_width, tile_height, prev_x, prev_y, + green_to_red_cur, accumulated_red_histo); + if (cur_diff < best_diff) { + best_diff = cur_diff; + green_to_red_best = green_to_red_cur; + } + } + } + best_tx->green_to_red_ = green_to_red_best; +} + +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[]) { + while (tile_height-- > 0) { + int x; + for (x = 0; x < tile_width; ++x) { + ++histo[TransformColorBlue(green_to_blue, red_to_blue, argb[x])]; + } + argb += stride; + } +} + +static float GetPredictionCostCrossColorBlue( + const uint32_t* argb, int stride, int tile_width, int tile_height, + VP8LMultipliers prev_x, VP8LMultipliers prev_y, + int green_to_blue, int red_to_blue, const int accumulated_blue_histo[256]) { + int histo[256] = { 0 }; + float cur_diff; + + VP8LCollectColorBlueTransforms(argb, stride, tile_width, tile_height, + green_to_blue, red_to_blue, histo); + + cur_diff = PredictionCostCrossColor(accumulated_blue_histo, histo); + if ((uint8_t)green_to_blue == prev_x.green_to_blue_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if ((uint8_t)green_to_blue == prev_y.green_to_blue_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if ((uint8_t)red_to_blue == prev_x.red_to_blue_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if ((uint8_t)red_to_blue == prev_y.red_to_blue_) { + cur_diff -= 3; // favor keeping the areas locally similar + } + if (green_to_blue == 0) { + cur_diff -= 3; + } + if (red_to_blue == 0) { + cur_diff -= 3; + } + return cur_diff; +} + +#define kGreenRedToBlueNumAxis 8 +#define kGreenRedToBlueMaxIters 7 +static void GetBestGreenRedToBlue( + const uint32_t* argb, int stride, int tile_width, int tile_height, + VP8LMultipliers prev_x, VP8LMultipliers prev_y, int quality, + const int accumulated_blue_histo[256], + VP8LMultipliers* const best_tx) { + const int8_t offset[kGreenRedToBlueNumAxis][2] = + {{0, -1}, {0, 1}, {-1, 0}, {1, 0}, {-1, -1}, {-1, 1}, {1, -1}, {1, 1}}; + const int8_t delta_lut[kGreenRedToBlueMaxIters] = { 16, 16, 8, 4, 2, 2, 2 }; + const int iters = + (quality < 25) ? 1 : (quality > 50) ? kGreenRedToBlueMaxIters : 4; + int green_to_blue_best = 0; + int red_to_blue_best = 0; + int iter; + // Initial value at origin: + float best_diff = GetPredictionCostCrossColorBlue( + argb, stride, tile_width, tile_height, prev_x, prev_y, + green_to_blue_best, red_to_blue_best, accumulated_blue_histo); + for (iter = 0; iter < iters; ++iter) { + const int delta = delta_lut[iter]; + int axis; + for (axis = 0; axis < kGreenRedToBlueNumAxis; ++axis) { + const int green_to_blue_cur = + offset[axis][0] * delta + green_to_blue_best; + const int red_to_blue_cur = offset[axis][1] * delta + red_to_blue_best; + const float cur_diff = GetPredictionCostCrossColorBlue( + argb, stride, tile_width, tile_height, prev_x, prev_y, + green_to_blue_cur, red_to_blue_cur, accumulated_blue_histo); + if (cur_diff < best_diff) { + best_diff = cur_diff; + green_to_blue_best = green_to_blue_cur; + red_to_blue_best = red_to_blue_cur; + } + if (quality < 25 && iter == 4) { + // Only axis aligned diffs for lower quality. + break; // next iter. + } + } + if (delta == 2 && green_to_blue_best == 0 && red_to_blue_best == 0) { + // Further iterations would not help. + break; // out of iter-loop. + } + } + best_tx->green_to_blue_ = green_to_blue_best; + best_tx->red_to_blue_ = red_to_blue_best; +} +#undef kGreenRedToBlueMaxIters +#undef kGreenRedToBlueNumAxis + +static VP8LMultipliers GetBestColorTransformForTile( + int tile_x, int tile_y, int bits, + VP8LMultipliers prev_x, + VP8LMultipliers prev_y, + int quality, int xsize, int ysize, + const int accumulated_red_histo[256], + const int accumulated_blue_histo[256], + const uint32_t* const argb) { + 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; + const int all_x_max = GetMin(tile_x_offset + max_tile_size, xsize); + const int all_y_max = GetMin(tile_y_offset + max_tile_size, ysize); + const int tile_width = all_x_max - tile_x_offset; + const int tile_height = all_y_max - tile_y_offset; + const uint32_t* const tile_argb = argb + tile_y_offset * xsize + + tile_x_offset; + VP8LMultipliers best_tx; + MultipliersClear(&best_tx); + + GetBestGreenToRed(tile_argb, xsize, tile_width, tile_height, + prev_x, prev_y, quality, accumulated_red_histo, &best_tx); + GetBestGreenRedToBlue(tile_argb, xsize, tile_width, tile_height, + prev_x, prev_y, quality, accumulated_blue_histo, + &best_tx); + return best_tx; +} + +static void CopyTileWithColorTransform(int xsize, int ysize, + int tile_x, int tile_y, + int max_tile_size, + VP8LMultipliers color_transform, + uint32_t* argb) { + const int xscan = GetMin(max_tile_size, xsize - tile_x); + int yscan = GetMin(max_tile_size, ysize - tile_y); + argb += tile_y * xsize + tile_x; + while (yscan-- > 0) { + VP8LTransformColor(&color_transform, argb, xscan); + argb += xsize; + } +} + +void VP8LColorSpaceTransform(int width, int height, int bits, int quality, + uint32_t* const argb, uint32_t* image) { + const int max_tile_size = 1 << bits; + const int tile_xsize = VP8LSubSampleSize(width, bits); + const int tile_ysize = VP8LSubSampleSize(height, bits); + int accumulated_red_histo[256] = { 0 }; + int accumulated_blue_histo[256] = { 0 }; + int tile_x, tile_y; + VP8LMultipliers prev_x, prev_y; + MultipliersClear(&prev_y); + MultipliersClear(&prev_x); + for (tile_y = 0; tile_y < tile_ysize; ++tile_y) { + for (tile_x = 0; tile_x < tile_xsize; ++tile_x) { + int y; + const int tile_x_offset = tile_x * max_tile_size; + const int tile_y_offset = tile_y * max_tile_size; + const int all_x_max = GetMin(tile_x_offset + max_tile_size, width); + const int all_y_max = GetMin(tile_y_offset + max_tile_size, height); + const int offset = tile_y * tile_xsize + tile_x; + if (tile_y != 0) { + ColorCodeToMultipliers(image[offset - tile_xsize], &prev_y); + } + prev_x = GetBestColorTransformForTile(tile_x, tile_y, bits, + prev_x, prev_y, + quality, width, height, + accumulated_red_histo, + accumulated_blue_histo, + argb); + image[offset] = MultipliersToColorCode(&prev_x); + CopyTileWithColorTransform(width, height, tile_x_offset, tile_y_offset, + max_tile_size, prev_x, argb); + + // Gather accumulated histogram data. + for (y = tile_y_offset; y < all_y_max; ++y) { + int ix = y * width + tile_x_offset; + const int ix_end = ix + all_x_max - tile_x_offset; + for (; ix < ix_end; ++ix) { + const uint32_t pix = argb[ix]; + if (ix >= 2 && + pix == argb[ix - 2] && + pix == 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] && + pix == argb[ix - width]) { + continue; // repeated pixels are handled by backward references + } + ++accumulated_red_histo[(pix >> 16) & 0xff]; + ++accumulated_blue_histo[(pix >> 0) & 0xff]; + } + } + } + } +} + +//------------------------------------------------------------------------------ + +static int VectorMismatch(const uint32_t* const array1, + const uint32_t* const array2, int length) { + int match_len = 0; + + while (match_len < length && array1[match_len] == array2[match_len]) { + ++match_len; + } + return match_len; +} + +// Bundles multiple (1, 2, 4 or 8) pixels into a single pixel. +void VP8LBundleColorMap(const uint8_t* const row, int width, + int xbits, uint32_t* const dst) { + int x; + if (xbits > 0) { + const int bit_depth = 1 << (3 - xbits); + const int mask = (1 << xbits) - 1; + uint32_t code = 0xff000000; + for (x = 0; x < width; ++x) { + const int xsub = x & mask; + if (xsub == 0) { + code = 0xff000000; + } + code |= row[x] << (8 + bit_depth * xsub); + dst[x >> xbits] = code; + } + } else { + for (x = 0; x < width; ++x) dst[x] = 0xff000000 | (row[x] << 8); + } +} + +//------------------------------------------------------------------------------ + +static double ExtraCost(const uint32_t* population, int length) { + int i; + double cost = 0.; + for (i = 2; i < length - 2; ++i) cost += (i >> 1) * population[i + 2]; + return cost; +} + +static double ExtraCostCombined(const uint32_t* X, const uint32_t* Y, + int length) { + int i; + double cost = 0.; + for (i = 2; i < length - 2; ++i) { + const int xy = X[i + 2] + Y[i + 2]; + cost += (i >> 1) * xy; + } + return cost; +} + +//------------------------------------------------------------------------------ + +static void HistogramAdd(const VP8LHistogram* const a, + const VP8LHistogram* const b, + VP8LHistogram* const out) { + int i; + const int literal_size = VP8LHistogramNumCodes(a->palette_code_bits_); + assert(a->palette_code_bits_ == b->palette_code_bits_); + if (b != out) { + for (i = 0; i < literal_size; ++i) { + out->literal_[i] = a->literal_[i] + b->literal_[i]; + } + for (i = 0; i < NUM_DISTANCE_CODES; ++i) { + out->distance_[i] = a->distance_[i] + b->distance_[i]; + } + for (i = 0; i < NUM_LITERAL_CODES; ++i) { + out->red_[i] = a->red_[i] + b->red_[i]; + out->blue_[i] = a->blue_[i] + b->blue_[i]; + out->alpha_[i] = a->alpha_[i] + b->alpha_[i]; + } + } else { + for (i = 0; i < literal_size; ++i) { + out->literal_[i] += a->literal_[i]; + } + for (i = 0; i < NUM_DISTANCE_CODES; ++i) { + out->distance_[i] += a->distance_[i]; + } + for (i = 0; i < NUM_LITERAL_CODES; ++i) { + out->red_[i] += a->red_[i]; + out->blue_[i] += a->blue_[i]; + out->alpha_[i] += a->alpha_[i]; + } + } +} + +//------------------------------------------------------------------------------ + +VP8LProcessBlueAndRedFunc VP8LSubtractGreenFromBlueAndRed; + +VP8LTransformColorFunc VP8LTransformColor; + +VP8LCollectColorBlueTransformsFunc VP8LCollectColorBlueTransforms; +VP8LCollectColorRedTransformsFunc VP8LCollectColorRedTransforms; + +VP8LFastLog2SlowFunc VP8LFastLog2Slow; +VP8LFastLog2SlowFunc VP8LFastSLog2Slow; + +VP8LCostFunc VP8LExtraCost; +VP8LCostCombinedFunc VP8LExtraCostCombined; +VP8LCombinedShannonEntropyFunc VP8LCombinedShannonEntropy; + +GetEntropyUnrefinedHelperFunc VP8LGetEntropyUnrefinedHelper; + +VP8LHistogramAddFunc VP8LHistogramAdd; + +VP8LVectorMismatchFunc VP8LVectorMismatch; + +extern void VP8LEncDspInitSSE2(void); +extern void VP8LEncDspInitSSE41(void); +extern void VP8LEncDspInitNEON(void); +extern void VP8LEncDspInitMIPS32(void); +extern void VP8LEncDspInitMIPSdspR2(void); + +static volatile VP8CPUInfo lossless_enc_last_cpuinfo_used = + (VP8CPUInfo)&lossless_enc_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInit(void) { + if (lossless_enc_last_cpuinfo_used == VP8GetCPUInfo) return; + + VP8LDspInit(); + + VP8LSubtractGreenFromBlueAndRed = VP8LSubtractGreenFromBlueAndRed_C; + + VP8LTransformColor = VP8LTransformColor_C; + + VP8LCollectColorBlueTransforms = VP8LCollectColorBlueTransforms_C; + VP8LCollectColorRedTransforms = VP8LCollectColorRedTransforms_C; + + VP8LFastLog2Slow = FastLog2Slow; + VP8LFastSLog2Slow = FastSLog2Slow; + + VP8LExtraCost = ExtraCost; + VP8LExtraCostCombined = ExtraCostCombined; + VP8LCombinedShannonEntropy = CombinedShannonEntropy; + + VP8LGetEntropyUnrefinedHelper = GetEntropyUnrefinedHelper; + + VP8LHistogramAdd = HistogramAdd; + + VP8LVectorMismatch = VectorMismatch; + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + VP8LEncDspInitSSE2(); +#if defined(WEBP_USE_SSE41) + if (VP8GetCPUInfo(kSSE4_1)) { + VP8LEncDspInitSSE41(); + } +#endif + } +#endif +#if defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + VP8LEncDspInitNEON(); + } +#endif +#if defined(WEBP_USE_MIPS32) + if (VP8GetCPUInfo(kMIPS32)) { + VP8LEncDspInitMIPS32(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + VP8LEncDspInitMIPSdspR2(); + } +#endif + } + lossless_enc_last_cpuinfo_used = VP8GetCPUInfo; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dsp/lossless_enc_mips32.c b/thirdparty/libwebp/dsp/lossless_enc_mips32.c new file mode 100644 index 0000000000..49c666d4fd --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_enc_mips32.c @@ -0,0 +1,386 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS version of lossless functions +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) +// Jovan Zelincevic (jovan.zelincevic@imgtec.com) + +#include "./dsp.h" +#include "./lossless.h" + +#if defined(WEBP_USE_MIPS32) + +#include <assert.h> +#include <math.h> +#include <stdlib.h> +#include <string.h> + +static float FastSLog2Slow(uint32_t v) { + assert(v >= LOG_LOOKUP_IDX_MAX); + if (v < APPROX_LOG_WITH_CORRECTION_MAX) { + uint32_t log_cnt, y, correction; + const int c24 = 24; + const float v_f = (float)v; + uint32_t temp; + + // Xf = 256 = 2^8 + // log_cnt is index of leading one in upper 24 bits + __asm__ volatile( + "clz %[log_cnt], %[v] \n\t" + "addiu %[y], $zero, 1 \n\t" + "subu %[log_cnt], %[c24], %[log_cnt] \n\t" + "sllv %[y], %[y], %[log_cnt] \n\t" + "srlv %[temp], %[v], %[log_cnt] \n\t" + : [log_cnt]"=&r"(log_cnt), [y]"=&r"(y), + [temp]"=r"(temp) + : [c24]"r"(c24), [v]"r"(v) + ); + + // vf = (2^log_cnt) * Xf; where y = 2^log_cnt and Xf < 256 + // Xf = floor(Xf) * (1 + (v % y) / v) + // log2(Xf) = log2(floor(Xf)) + log2(1 + (v % y) / v) + // The correction factor: log(1 + d) ~ d; for very small d values, so + // log2(1 + (v % y) / v) ~ LOG_2_RECIPROCAL * (v % y)/v + // LOG_2_RECIPROCAL ~ 23/16 + + // (v % y) = (v % 2^log_cnt) = v & (2^log_cnt - 1) + correction = (23 * (v & (y - 1))) >> 4; + return v_f * (kLog2Table[temp] + log_cnt) + correction; + } else { + return (float)(LOG_2_RECIPROCAL * v * log((double)v)); + } +} + +static float FastLog2Slow(uint32_t v) { + assert(v >= LOG_LOOKUP_IDX_MAX); + if (v < APPROX_LOG_WITH_CORRECTION_MAX) { + uint32_t log_cnt, y; + const int c24 = 24; + double log_2; + uint32_t temp; + + __asm__ volatile( + "clz %[log_cnt], %[v] \n\t" + "addiu %[y], $zero, 1 \n\t" + "subu %[log_cnt], %[c24], %[log_cnt] \n\t" + "sllv %[y], %[y], %[log_cnt] \n\t" + "srlv %[temp], %[v], %[log_cnt] \n\t" + : [log_cnt]"=&r"(log_cnt), [y]"=&r"(y), + [temp]"=r"(temp) + : [c24]"r"(c24), [v]"r"(v) + ); + + log_2 = kLog2Table[temp] + log_cnt; + if (v >= APPROX_LOG_MAX) { + // Since the division is still expensive, add this correction factor only + // for large values of 'v'. + + const uint32_t correction = (23 * (v & (y - 1))) >> 4; + log_2 += (double)correction / v; + } + return (float)log_2; + } else { + return (float)(LOG_2_RECIPROCAL * log((double)v)); + } +} + +// C version of this function: +// int i = 0; +// int64_t cost = 0; +// const uint32_t* pop = &population[4]; +// const uint32_t* LoopEnd = &population[length]; +// while (pop != LoopEnd) { +// ++i; +// cost += i * *pop; +// cost += i * *(pop + 1); +// pop += 2; +// } +// return (double)cost; +static double ExtraCost(const uint32_t* const population, int length) { + int i, temp0, temp1; + const uint32_t* pop = &population[4]; + const uint32_t* const LoopEnd = &population[length]; + + __asm__ volatile( + "mult $zero, $zero \n\t" + "xor %[i], %[i], %[i] \n\t" + "beq %[pop], %[LoopEnd], 2f \n\t" + "1: \n\t" + "lw %[temp0], 0(%[pop]) \n\t" + "lw %[temp1], 4(%[pop]) \n\t" + "addiu %[i], %[i], 1 \n\t" + "addiu %[pop], %[pop], 8 \n\t" + "madd %[i], %[temp0] \n\t" + "madd %[i], %[temp1] \n\t" + "bne %[pop], %[LoopEnd], 1b \n\t" + "2: \n\t" + "mfhi %[temp0] \n\t" + "mflo %[temp1] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), + [i]"=&r"(i), [pop]"+r"(pop) + : [LoopEnd]"r"(LoopEnd) + : "memory", "hi", "lo" + ); + + return (double)((int64_t)temp0 << 32 | temp1); +} + +// C version of this function: +// int i = 0; +// int64_t cost = 0; +// const uint32_t* pX = &X[4]; +// const uint32_t* pY = &Y[4]; +// const uint32_t* LoopEnd = &X[length]; +// while (pX != LoopEnd) { +// const uint32_t xy0 = *pX + *pY; +// const uint32_t xy1 = *(pX + 1) + *(pY + 1); +// ++i; +// cost += i * xy0; +// cost += i * xy1; +// pX += 2; +// pY += 2; +// } +// return (double)cost; +static double ExtraCostCombined(const uint32_t* const X, + const uint32_t* const Y, int length) { + int i, temp0, temp1, temp2, temp3; + const uint32_t* pX = &X[4]; + const uint32_t* pY = &Y[4]; + const uint32_t* const LoopEnd = &X[length]; + + __asm__ volatile( + "mult $zero, $zero \n\t" + "xor %[i], %[i], %[i] \n\t" + "beq %[pX], %[LoopEnd], 2f \n\t" + "1: \n\t" + "lw %[temp0], 0(%[pX]) \n\t" + "lw %[temp1], 0(%[pY]) \n\t" + "lw %[temp2], 4(%[pX]) \n\t" + "lw %[temp3], 4(%[pY]) \n\t" + "addiu %[i], %[i], 1 \n\t" + "addu %[temp0], %[temp0], %[temp1] \n\t" + "addu %[temp2], %[temp2], %[temp3] \n\t" + "addiu %[pX], %[pX], 8 \n\t" + "addiu %[pY], %[pY], 8 \n\t" + "madd %[i], %[temp0] \n\t" + "madd %[i], %[temp2] \n\t" + "bne %[pX], %[LoopEnd], 1b \n\t" + "2: \n\t" + "mfhi %[temp0] \n\t" + "mflo %[temp1] \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), + [i]"=&r"(i), [pX]"+r"(pX), [pY]"+r"(pY) + : [LoopEnd]"r"(LoopEnd) + : "memory", "hi", "lo" + ); + + return (double)((int64_t)temp0 << 32 | temp1); +} + +#define HUFFMAN_COST_PASS \ + __asm__ volatile( \ + "sll %[temp1], %[temp0], 3 \n\t" \ + "addiu %[temp3], %[streak], -3 \n\t" \ + "addu %[temp2], %[pstreaks], %[temp1] \n\t" \ + "blez %[temp3], 1f \n\t" \ + "srl %[temp1], %[temp1], 1 \n\t" \ + "addu %[temp3], %[pcnts], %[temp1] \n\t" \ + "lw %[temp0], 4(%[temp2]) \n\t" \ + "lw %[temp1], 0(%[temp3]) \n\t" \ + "addu %[temp0], %[temp0], %[streak] \n\t" \ + "addiu %[temp1], %[temp1], 1 \n\t" \ + "sw %[temp0], 4(%[temp2]) \n\t" \ + "sw %[temp1], 0(%[temp3]) \n\t" \ + "b 2f \n\t" \ + "1: \n\t" \ + "lw %[temp0], 0(%[temp2]) \n\t" \ + "addu %[temp0], %[temp0], %[streak] \n\t" \ + "sw %[temp0], 0(%[temp2]) \n\t" \ + "2: \n\t" \ + : [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), \ + [temp3]"=&r"(temp3), [temp0]"+r"(temp0) \ + : [pstreaks]"r"(pstreaks), [pcnts]"r"(pcnts), \ + [streak]"r"(streak) \ + : "memory" \ + ); + +// Returns the various RLE counts +static WEBP_INLINE void GetEntropyUnrefinedHelper( + uint32_t val, int i, uint32_t* const val_prev, int* const i_prev, + VP8LBitEntropy* const bit_entropy, VP8LStreaks* const stats) { + int* const pstreaks = &stats->streaks[0][0]; + int* const pcnts = &stats->counts[0]; + int temp0, temp1, temp2, temp3; + const int streak = i - *i_prev; + + // Gather info for the bit entropy. + if (*val_prev != 0) { + bit_entropy->sum += (*val_prev) * streak; + bit_entropy->nonzeros += streak; + bit_entropy->nonzero_code = *i_prev; + bit_entropy->entropy -= VP8LFastSLog2(*val_prev) * streak; + if (bit_entropy->max_val < *val_prev) { + bit_entropy->max_val = *val_prev; + } + } + + // Gather info for the Huffman cost. + temp0 = (*val_prev != 0); + HUFFMAN_COST_PASS + + *val_prev = val; + *i_prev = i; +} + +#define ASM_START \ + __asm__ volatile( \ + ".set push \n\t" \ + ".set at \n\t" \ + ".set macro \n\t" \ + "1: \n\t" + +// P2 = P0 + P1 +// A..D - offsets +// E - temp variable to tell macro +// if pointer should be incremented +// literal_ and successive histograms could be unaligned +// so we must use ulw and usw +#define ADD_TO_OUT(A, B, C, D, E, P0, P1, P2) \ + "ulw %[temp0], " #A "(%[" #P0 "]) \n\t" \ + "ulw %[temp1], " #B "(%[" #P0 "]) \n\t" \ + "ulw %[temp2], " #C "(%[" #P0 "]) \n\t" \ + "ulw %[temp3], " #D "(%[" #P0 "]) \n\t" \ + "ulw %[temp4], " #A "(%[" #P1 "]) \n\t" \ + "ulw %[temp5], " #B "(%[" #P1 "]) \n\t" \ + "ulw %[temp6], " #C "(%[" #P1 "]) \n\t" \ + "ulw %[temp7], " #D "(%[" #P1 "]) \n\t" \ + "addu %[temp4], %[temp4], %[temp0] \n\t" \ + "addu %[temp5], %[temp5], %[temp1] \n\t" \ + "addu %[temp6], %[temp6], %[temp2] \n\t" \ + "addu %[temp7], %[temp7], %[temp3] \n\t" \ + "addiu %[" #P0 "], %[" #P0 "], 16 \n\t" \ + ".if " #E " == 1 \n\t" \ + "addiu %[" #P1 "], %[" #P1 "], 16 \n\t" \ + ".endif \n\t" \ + "usw %[temp4], " #A "(%[" #P2 "]) \n\t" \ + "usw %[temp5], " #B "(%[" #P2 "]) \n\t" \ + "usw %[temp6], " #C "(%[" #P2 "]) \n\t" \ + "usw %[temp7], " #D "(%[" #P2 "]) \n\t" \ + "addiu %[" #P2 "], %[" #P2 "], 16 \n\t" \ + "bne %[" #P0 "], %[LoopEnd], 1b \n\t" \ + ".set pop \n\t" \ + +#define ASM_END_COMMON_0 \ + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), \ + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), \ + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), \ + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), \ + [pa]"+r"(pa), [pout]"+r"(pout) + +#define ASM_END_COMMON_1 \ + : [LoopEnd]"r"(LoopEnd) \ + : "memory", "at" \ + ); + +#define ASM_END_0 \ + ASM_END_COMMON_0 \ + , [pb]"+r"(pb) \ + ASM_END_COMMON_1 + +#define ASM_END_1 \ + ASM_END_COMMON_0 \ + ASM_END_COMMON_1 + +#define ADD_VECTOR(A, B, OUT, SIZE, EXTRA_SIZE) do { \ + const uint32_t* pa = (const uint32_t*)(A); \ + const uint32_t* pb = (const uint32_t*)(B); \ + uint32_t* pout = (uint32_t*)(OUT); \ + const uint32_t* const LoopEnd = pa + (SIZE); \ + assert((SIZE) % 4 == 0); \ + ASM_START \ + ADD_TO_OUT(0, 4, 8, 12, 1, pa, pb, pout) \ + ASM_END_0 \ + if ((EXTRA_SIZE) > 0) { \ + const int last = (EXTRA_SIZE); \ + int i; \ + for (i = 0; i < last; ++i) pout[i] = pa[i] + pb[i]; \ + } \ +} while (0) + +#define ADD_VECTOR_EQ(A, OUT, SIZE, EXTRA_SIZE) do { \ + const uint32_t* pa = (const uint32_t*)(A); \ + uint32_t* pout = (uint32_t*)(OUT); \ + const uint32_t* const LoopEnd = pa + (SIZE); \ + assert((SIZE) % 4 == 0); \ + ASM_START \ + ADD_TO_OUT(0, 4, 8, 12, 0, pa, pout, pout) \ + ASM_END_1 \ + if ((EXTRA_SIZE) > 0) { \ + const int last = (EXTRA_SIZE); \ + int i; \ + for (i = 0; i < last; ++i) pout[i] += pa[i]; \ + } \ +} while (0) + +static void HistogramAdd(const VP8LHistogram* const a, + const VP8LHistogram* const b, + VP8LHistogram* const out) { + uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; + const int extra_cache_size = VP8LHistogramNumCodes(a->palette_code_bits_) + - (NUM_LITERAL_CODES + NUM_LENGTH_CODES); + assert(a->palette_code_bits_ == b->palette_code_bits_); + + if (b != out) { + ADD_VECTOR(a->literal_, b->literal_, out->literal_, + NUM_LITERAL_CODES + NUM_LENGTH_CODES, extra_cache_size); + ADD_VECTOR(a->distance_, b->distance_, out->distance_, + NUM_DISTANCE_CODES, 0); + ADD_VECTOR(a->red_, b->red_, out->red_, NUM_LITERAL_CODES, 0); + ADD_VECTOR(a->blue_, b->blue_, out->blue_, NUM_LITERAL_CODES, 0); + ADD_VECTOR(a->alpha_, b->alpha_, out->alpha_, NUM_LITERAL_CODES, 0); + } else { + ADD_VECTOR_EQ(a->literal_, out->literal_, + NUM_LITERAL_CODES + NUM_LENGTH_CODES, extra_cache_size); + ADD_VECTOR_EQ(a->distance_, out->distance_, NUM_DISTANCE_CODES, 0); + ADD_VECTOR_EQ(a->red_, out->red_, NUM_LITERAL_CODES, 0); + ADD_VECTOR_EQ(a->blue_, out->blue_, NUM_LITERAL_CODES, 0); + ADD_VECTOR_EQ(a->alpha_, out->alpha_, NUM_LITERAL_CODES, 0); + } +} + +#undef ADD_VECTOR_EQ +#undef ADD_VECTOR +#undef ASM_END_1 +#undef ASM_END_0 +#undef ASM_END_COMMON_1 +#undef ASM_END_COMMON_0 +#undef ADD_TO_OUT +#undef ASM_START + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8LEncDspInitMIPS32(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitMIPS32(void) { + VP8LFastSLog2Slow = FastSLog2Slow; + VP8LFastLog2Slow = FastLog2Slow; + VP8LExtraCost = ExtraCost; + VP8LExtraCostCombined = ExtraCostCombined; + VP8LGetEntropyUnrefinedHelper = GetEntropyUnrefinedHelper; + VP8LHistogramAdd = HistogramAdd; +} + +#else // !WEBP_USE_MIPS32 + +WEBP_DSP_INIT_STUB(VP8LEncDspInitMIPS32) + +#endif // WEBP_USE_MIPS32 diff --git a/thirdparty/libwebp/dsp/lossless_enc_mips_dsp_r2.c b/thirdparty/libwebp/dsp/lossless_enc_mips_dsp_r2.c new file mode 100644 index 0000000000..0abf3c4f36 --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_enc_mips_dsp_r2.c @@ -0,0 +1,275 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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 transform methods for lossless encoder. +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) +// Jovan Zelincevic (jovan.zelincevic@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include "./lossless.h" + +static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, + int num_pixels) { + uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; + uint32_t* const p_loop1_end = argb_data + (num_pixels & ~3); + uint32_t* const p_loop2_end = p_loop1_end + (num_pixels & 3); + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[argb_data], %[p_loop1_end], 3f \n\t" + " nop \n\t" + "0: \n\t" + "lw %[temp0], 0(%[argb_data]) \n\t" + "lw %[temp1], 4(%[argb_data]) \n\t" + "lw %[temp2], 8(%[argb_data]) \n\t" + "lw %[temp3], 12(%[argb_data]) \n\t" + "ext %[temp4], %[temp0], 8, 8 \n\t" + "ext %[temp5], %[temp1], 8, 8 \n\t" + "ext %[temp6], %[temp2], 8, 8 \n\t" + "ext %[temp7], %[temp3], 8, 8 \n\t" + "addiu %[argb_data], %[argb_data], 16 \n\t" + "replv.ph %[temp4], %[temp4] \n\t" + "replv.ph %[temp5], %[temp5] \n\t" + "replv.ph %[temp6], %[temp6] \n\t" + "replv.ph %[temp7], %[temp7] \n\t" + "subu.qb %[temp0], %[temp0], %[temp4] \n\t" + "subu.qb %[temp1], %[temp1], %[temp5] \n\t" + "subu.qb %[temp2], %[temp2], %[temp6] \n\t" + "subu.qb %[temp3], %[temp3], %[temp7] \n\t" + "sw %[temp0], -16(%[argb_data]) \n\t" + "sw %[temp1], -12(%[argb_data]) \n\t" + "sw %[temp2], -8(%[argb_data]) \n\t" + "bne %[argb_data], %[p_loop1_end], 0b \n\t" + " sw %[temp3], -4(%[argb_data]) \n\t" + "3: \n\t" + "beq %[argb_data], %[p_loop2_end], 2f \n\t" + " nop \n\t" + "1: \n\t" + "lw %[temp0], 0(%[argb_data]) \n\t" + "addiu %[argb_data], %[argb_data], 4 \n\t" + "ext %[temp4], %[temp0], 8, 8 \n\t" + "replv.ph %[temp4], %[temp4] \n\t" + "subu.qb %[temp0], %[temp0], %[temp4] \n\t" + "bne %[argb_data], %[p_loop2_end], 1b \n\t" + " sw %[temp0], -4(%[argb_data]) \n\t" + "2: \n\t" + ".set pop \n\t" + : [argb_data]"+&r"(argb_data), [temp0]"=&r"(temp0), + [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6), + [temp7]"=&r"(temp7) + : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) + : "memory" + ); +} + +static WEBP_INLINE uint32_t ColorTransformDelta(int8_t color_pred, + int8_t color) { + return (uint32_t)((int)(color_pred) * color) >> 5; +} + +static void TransformColor(const VP8LMultipliers* const m, uint32_t* data, + int num_pixels) { + int temp0, temp1, temp2, temp3, temp4, temp5; + uint32_t argb, argb1, new_red, new_red1; + const uint32_t G_to_R = m->green_to_red_; + const uint32_t G_to_B = m->green_to_blue_; + const uint32_t R_to_B = m->red_to_blue_; + uint32_t* const p_loop_end = data + (num_pixels & ~1); + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[data], %[p_loop_end], 1f \n\t" + " nop \n\t" + "replv.ph %[temp0], %[G_to_R] \n\t" + "replv.ph %[temp1], %[G_to_B] \n\t" + "replv.ph %[temp2], %[R_to_B] \n\t" + "shll.ph %[temp0], %[temp0], 8 \n\t" + "shll.ph %[temp1], %[temp1], 8 \n\t" + "shll.ph %[temp2], %[temp2], 8 \n\t" + "shra.ph %[temp0], %[temp0], 8 \n\t" + "shra.ph %[temp1], %[temp1], 8 \n\t" + "shra.ph %[temp2], %[temp2], 8 \n\t" + "0: \n\t" + "lw %[argb], 0(%[data]) \n\t" + "lw %[argb1], 4(%[data]) \n\t" + "lhu %[new_red], 2(%[data]) \n\t" + "lhu %[new_red1], 6(%[data]) \n\t" + "precrq.qb.ph %[temp3], %[argb], %[argb1] \n\t" + "precr.qb.ph %[temp4], %[argb], %[argb1] \n\t" + "preceu.ph.qbra %[temp3], %[temp3] \n\t" + "preceu.ph.qbla %[temp4], %[temp4] \n\t" + "shll.ph %[temp3], %[temp3], 8 \n\t" + "shll.ph %[temp4], %[temp4], 8 \n\t" + "shra.ph %[temp3], %[temp3], 8 \n\t" + "shra.ph %[temp4], %[temp4], 8 \n\t" + "mul.ph %[temp5], %[temp3], %[temp0] \n\t" + "mul.ph %[temp3], %[temp3], %[temp1] \n\t" + "mul.ph %[temp4], %[temp4], %[temp2] \n\t" + "addiu %[data], %[data], 8 \n\t" + "ins %[new_red1], %[new_red], 16, 16 \n\t" + "ins %[argb1], %[argb], 16, 16 \n\t" + "shra.ph %[temp5], %[temp5], 5 \n\t" + "shra.ph %[temp3], %[temp3], 5 \n\t" + "shra.ph %[temp4], %[temp4], 5 \n\t" + "subu.ph %[new_red1], %[new_red1], %[temp5] \n\t" + "subu.ph %[argb1], %[argb1], %[temp3] \n\t" + "preceu.ph.qbra %[temp5], %[new_red1] \n\t" + "subu.ph %[argb1], %[argb1], %[temp4] \n\t" + "preceu.ph.qbra %[temp3], %[argb1] \n\t" + "sb %[temp5], -2(%[data]) \n\t" + "sb %[temp3], -4(%[data]) \n\t" + "sra %[temp5], %[temp5], 16 \n\t" + "sra %[temp3], %[temp3], 16 \n\t" + "sb %[temp5], -6(%[data]) \n\t" + "bne %[data], %[p_loop_end], 0b \n\t" + " sb %[temp3], -8(%[data]) \n\t" + "1: \n\t" + ".set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [new_red1]"=&r"(new_red1), [new_red]"=&r"(new_red), + [argb]"=&r"(argb), [argb1]"=&r"(argb1), [data]"+&r"(data) + : [G_to_R]"r"(G_to_R), [R_to_B]"r"(R_to_B), + [G_to_B]"r"(G_to_B), [p_loop_end]"r"(p_loop_end) + : "memory", "hi", "lo" + ); + + if (num_pixels & 1) { + const uint32_t argb_ = data[0]; + const uint32_t green = argb_ >> 8; + const uint32_t red = argb_ >> 16; + uint32_t new_blue = argb_; + new_red = red; + 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; + data[0] = (argb_ & 0xff00ff00u) | (new_red << 16) | (new_blue); + } +} + +static WEBP_INLINE uint8_t TransformColorBlue(uint8_t green_to_blue, + uint8_t red_to_blue, + uint32_t argb) { + const uint32_t green = argb >> 8; + const uint32_t red = argb >> 16; + uint8_t new_blue = argb; + new_blue -= ColorTransformDelta(green_to_blue, green); + new_blue -= ColorTransformDelta(red_to_blue, red); + return (new_blue & 0xff); +} + +static void CollectColorBlueTransforms(const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_blue, int red_to_blue, + int histo[]) { + const int rtb = (red_to_blue << 16) | (red_to_blue & 0xffff); + const int gtb = (green_to_blue << 16) | (green_to_blue & 0xffff); + const uint32_t mask = 0xff00ffu; + while (tile_height-- > 0) { + int x; + const uint32_t* p_argb = argb; + argb += stride; + for (x = 0; x < (tile_width >> 1); ++x) { + int temp0, temp1, temp2, temp3, temp4, temp5, temp6; + __asm__ volatile ( + "lw %[temp0], 0(%[p_argb]) \n\t" + "lw %[temp1], 4(%[p_argb]) \n\t" + "precr.qb.ph %[temp2], %[temp0], %[temp1] \n\t" + "ins %[temp1], %[temp0], 16, 16 \n\t" + "shra.ph %[temp2], %[temp2], 8 \n\t" + "shra.ph %[temp3], %[temp1], 8 \n\t" + "mul.ph %[temp5], %[temp2], %[rtb] \n\t" + "mul.ph %[temp6], %[temp3], %[gtb] \n\t" + "and %[temp4], %[temp1], %[mask] \n\t" + "addiu %[p_argb], %[p_argb], 8 \n\t" + "shra.ph %[temp5], %[temp5], 5 \n\t" + "shra.ph %[temp6], %[temp6], 5 \n\t" + "subu.qb %[temp2], %[temp4], %[temp5] \n\t" + "subu.qb %[temp2], %[temp2], %[temp6] \n\t" + : [p_argb]"+&r"(p_argb), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), + [temp5]"=&r"(temp5), [temp6]"=&r"(temp6) + : [rtb]"r"(rtb), [gtb]"r"(gtb), [mask]"r"(mask) + : "memory", "hi", "lo" + ); + ++histo[(uint8_t)(temp2 >> 16)]; + ++histo[(uint8_t)temp2]; + } + if (tile_width & 1) { + ++histo[TransformColorBlue(green_to_blue, red_to_blue, *p_argb)]; + } + } +} + +static WEBP_INLINE uint8_t TransformColorRed(uint8_t green_to_red, + uint32_t argb) { + const uint32_t green = argb >> 8; + uint32_t new_red = argb >> 16; + new_red -= ColorTransformDelta(green_to_red, green); + return (new_red & 0xff); +} + +static void CollectColorRedTransforms(const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_red, int histo[]) { + const int gtr = (green_to_red << 16) | (green_to_red & 0xffff); + while (tile_height-- > 0) { + int x; + const uint32_t* p_argb = argb; + argb += stride; + for (x = 0; x < (tile_width >> 1); ++x) { + int temp0, temp1, temp2, temp3, temp4; + __asm__ volatile ( + "lw %[temp0], 0(%[p_argb]) \n\t" + "lw %[temp1], 4(%[p_argb]) \n\t" + "precrq.ph.w %[temp4], %[temp0], %[temp1] \n\t" + "ins %[temp1], %[temp0], 16, 16 \n\t" + "shra.ph %[temp3], %[temp1], 8 \n\t" + "mul.ph %[temp2], %[temp3], %[gtr] \n\t" + "addiu %[p_argb], %[p_argb], 8 \n\t" + "shra.ph %[temp2], %[temp2], 5 \n\t" + "subu.qb %[temp2], %[temp4], %[temp2] \n\t" + : [p_argb]"+&r"(p_argb), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4) + : [gtr]"r"(gtr) + : "memory", "hi", "lo" + ); + ++histo[(uint8_t)(temp2 >> 16)]; + ++histo[(uint8_t)temp2]; + } + if (tile_width & 1) { + ++histo[TransformColorRed(green_to_red, *p_argb)]; + } + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8LEncDspInitMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitMIPSdspR2(void) { + VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed; + VP8LTransformColor = TransformColor; + VP8LCollectColorBlueTransforms = CollectColorBlueTransforms; + VP8LCollectColorRedTransforms = CollectColorRedTransforms; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(VP8LEncDspInitMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/lossless_enc_neon.c b/thirdparty/libwebp/dsp/lossless_enc_neon.c new file mode 100644 index 0000000000..4c56f2594b --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_enc_neon.c @@ -0,0 +1,143 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// NEON variant of methods for lossless encoder +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_NEON) + +#include <arm_neon.h> + +#include "./lossless.h" +#include "./neon.h" + +//------------------------------------------------------------------------------ +// Subtract-Green Transform + +// vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use +// non-standard versions there. +#if defined(__APPLE__) && defined(__aarch64__) && \ + defined(__apple_build_version__) && (__apple_build_version__< 6020037) +#define USE_VTBLQ +#endif + +#ifdef USE_VTBLQ +// 255 = byte will be zeroed +static const uint8_t kGreenShuffle[16] = { + 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255 +}; + +static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb, + const uint8x16_t shuffle) { + return vcombine_u8(vtbl1q_u8(argb, vget_low_u8(shuffle)), + vtbl1q_u8(argb, vget_high_u8(shuffle))); +} +#else // !USE_VTBLQ +// 255 = byte will be zeroed +static const uint8_t kGreenShuffle[8] = { 1, 255, 1, 255, 5, 255, 5, 255 }; + +static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb, + const uint8x8_t shuffle) { + return vcombine_u8(vtbl1_u8(vget_low_u8(argb), shuffle), + vtbl1_u8(vget_high_u8(argb), shuffle)); +} +#endif // USE_VTBLQ + +static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixels) { + const uint32_t* const end = argb_data + (num_pixels & ~3); +#ifdef USE_VTBLQ + const uint8x16_t shuffle = vld1q_u8(kGreenShuffle); +#else + const uint8x8_t shuffle = vld1_u8(kGreenShuffle); +#endif + for (; argb_data < end; argb_data += 4) { + const uint8x16_t argb = vld1q_u8((uint8_t*)argb_data); + const uint8x16_t greens = DoGreenShuffle(argb, shuffle); + vst1q_u8((uint8_t*)argb_data, vsubq_u8(argb, greens)); + } + // fallthrough and finish off with plain-C + VP8LSubtractGreenFromBlueAndRed_C(argb_data, num_pixels & 3); +} + +//------------------------------------------------------------------------------ +// Color Transform + +static void TransformColor(const VP8LMultipliers* const m, + uint32_t* argb_data, int num_pixels) { + // sign-extended multiplying constants, pre-shifted by 6. +#define CST(X) (((int16_t)(m->X << 8)) >> 6) + const int16_t rb[8] = { + CST(green_to_blue_), CST(green_to_red_), + CST(green_to_blue_), CST(green_to_red_), + CST(green_to_blue_), CST(green_to_red_), + CST(green_to_blue_), CST(green_to_red_) + }; + const int16x8_t mults_rb = vld1q_s16(rb); + const int16_t b2[8] = { + 0, CST(red_to_blue_), 0, CST(red_to_blue_), + 0, CST(red_to_blue_), 0, CST(red_to_blue_), + }; + const int16x8_t mults_b2 = vld1q_s16(b2); +#undef CST +#ifdef USE_VTBLQ + static const uint8_t kg0g0[16] = { + 255, 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13 + }; + const uint8x16_t shuffle = vld1q_u8(kg0g0); +#else + static const uint8_t k0g0g[8] = { 255, 1, 255, 1, 255, 5, 255, 5 }; + const uint8x8_t shuffle = vld1_u8(k0g0g); +#endif + const uint32x4_t mask_rb = vdupq_n_u32(0x00ff00ffu); // red-blue masks + int i; + for (i = 0; i + 4 <= num_pixels; i += 4) { + const uint8x16_t in = vld1q_u8((uint8_t*)(argb_data + i)); + // 0 g 0 g + const uint8x16_t greens = DoGreenShuffle(in, shuffle); + // x dr x db1 + const int16x8_t A = vqdmulhq_s16(vreinterpretq_s16_u8(greens), mults_rb); + // r 0 b 0 + const int16x8_t B = vshlq_n_s16(vreinterpretq_s16_u8(in), 8); + // x db2 0 0 + const int16x8_t C = vqdmulhq_s16(B, mults_b2); + // 0 0 x db2 + const uint32x4_t D = vshrq_n_u32(vreinterpretq_u32_s16(C), 16); + // x dr x db + const int8x16_t E = vaddq_s8(vreinterpretq_s8_u32(D), + vreinterpretq_s8_s16(A)); + // 0 dr 0 db + const uint32x4_t F = vandq_u32(vreinterpretq_u32_s8(E), mask_rb); + const int8x16_t out = vsubq_s8(vreinterpretq_s8_u8(in), + vreinterpretq_s8_u32(F)); + vst1q_s8((int8_t*)(argb_data + i), out); + } + // fallthrough and finish off with plain-C + VP8LTransformColor_C(m, argb_data + i, num_pixels - i); +} + +#undef USE_VTBLQ + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8LEncDspInitNEON(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitNEON(void) { + VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed; + VP8LTransformColor = TransformColor; +} + +#else // !WEBP_USE_NEON + +WEBP_DSP_INIT_STUB(VP8LEncDspInitNEON) + +#endif // WEBP_USE_NEON diff --git a/thirdparty/libwebp/dsp/lossless_enc_sse2.c b/thirdparty/libwebp/dsp/lossless_enc_sse2.c new file mode 100644 index 0000000000..7c894e7ca4 --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_enc_sse2.c @@ -0,0 +1,397 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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 variant of methods for lossless encoder +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) +#include <assert.h> +#include <emmintrin.h> +#include "./lossless.h" + +// For sign-extended multiplying constants, pre-shifted by 5: +#define CST_5b(X) (((int16_t)((uint16_t)X << 8)) >> 5) + +//------------------------------------------------------------------------------ +// Subtract-Green Transform + +static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixels) { + int i; + for (i = 0; i + 4 <= num_pixels; i += 4) { + const __m128i in = _mm_loadu_si128((__m128i*)&argb_data[i]); // argb + const __m128i A = _mm_srli_epi16(in, 8); // 0 a 0 g + const __m128i B = _mm_shufflelo_epi16(A, _MM_SHUFFLE(2, 2, 0, 0)); + const __m128i C = _mm_shufflehi_epi16(B, _MM_SHUFFLE(2, 2, 0, 0)); // 0g0g + const __m128i out = _mm_sub_epi8(in, C); + _mm_storeu_si128((__m128i*)&argb_data[i], out); + } + // fallthrough and finish off with plain-C + VP8LSubtractGreenFromBlueAndRed_C(argb_data + i, num_pixels - i); +} + +//------------------------------------------------------------------------------ +// Color Transform + +static void TransformColor(const VP8LMultipliers* const m, + uint32_t* argb_data, int num_pixels) { + const __m128i mults_rb = _mm_set_epi16( + CST_5b(m->green_to_red_), CST_5b(m->green_to_blue_), + CST_5b(m->green_to_red_), CST_5b(m->green_to_blue_), + CST_5b(m->green_to_red_), CST_5b(m->green_to_blue_), + CST_5b(m->green_to_red_), CST_5b(m->green_to_blue_)); + const __m128i mults_b2 = _mm_set_epi16( + CST_5b(m->red_to_blue_), 0, CST_5b(m->red_to_blue_), 0, + CST_5b(m->red_to_blue_), 0, CST_5b(m->red_to_blue_), 0); + const __m128i mask_ag = _mm_set1_epi32(0xff00ff00); // alpha-green masks + const __m128i mask_rb = _mm_set1_epi32(0x00ff00ff); // red-blue masks + int i; + for (i = 0; i + 4 <= num_pixels; i += 4) { + const __m128i in = _mm_loadu_si128((__m128i*)&argb_data[i]); // argb + const __m128i A = _mm_and_si128(in, mask_ag); // a 0 g 0 + const __m128i B = _mm_shufflelo_epi16(A, _MM_SHUFFLE(2, 2, 0, 0)); + const __m128i C = _mm_shufflehi_epi16(B, _MM_SHUFFLE(2, 2, 0, 0)); // g0g0 + const __m128i D = _mm_mulhi_epi16(C, mults_rb); // x dr x db1 + const __m128i E = _mm_slli_epi16(in, 8); // r 0 b 0 + const __m128i F = _mm_mulhi_epi16(E, mults_b2); // x db2 0 0 + const __m128i G = _mm_srli_epi32(F, 16); // 0 0 x db2 + const __m128i H = _mm_add_epi8(G, D); // x dr x db + const __m128i I = _mm_and_si128(H, mask_rb); // 0 dr 0 db + const __m128i out = _mm_sub_epi8(in, I); + _mm_storeu_si128((__m128i*)&argb_data[i], out); + } + // fallthrough and finish off with plain-C + VP8LTransformColor_C(m, argb_data + i, num_pixels - i); +} + +//------------------------------------------------------------------------------ +#define SPAN 8 +static void CollectColorBlueTransforms(const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_blue, int red_to_blue, + int histo[]) { + const __m128i mults_r = _mm_set_epi16( + CST_5b(red_to_blue), 0, CST_5b(red_to_blue), 0, + CST_5b(red_to_blue), 0, CST_5b(red_to_blue), 0); + const __m128i mults_g = _mm_set_epi16( + 0, CST_5b(green_to_blue), 0, CST_5b(green_to_blue), + 0, CST_5b(green_to_blue), 0, CST_5b(green_to_blue)); + const __m128i mask_g = _mm_set1_epi32(0x00ff00); // green mask + const __m128i mask_b = _mm_set1_epi32(0x0000ff); // blue mask + int y; + for (y = 0; y < tile_height; ++y) { + const uint32_t* const src = argb + y * stride; + int i, x; + for (x = 0; x + SPAN <= tile_width; x += SPAN) { + uint16_t values[SPAN]; + const __m128i in0 = _mm_loadu_si128((__m128i*)&src[x + 0]); + const __m128i in1 = _mm_loadu_si128((__m128i*)&src[x + SPAN / 2]); + const __m128i A0 = _mm_slli_epi16(in0, 8); // r 0 | b 0 + const __m128i A1 = _mm_slli_epi16(in1, 8); + const __m128i B0 = _mm_and_si128(in0, mask_g); // 0 0 | g 0 + const __m128i B1 = _mm_and_si128(in1, mask_g); + const __m128i C0 = _mm_mulhi_epi16(A0, mults_r); // x db | 0 0 + const __m128i C1 = _mm_mulhi_epi16(A1, mults_r); + const __m128i D0 = _mm_mulhi_epi16(B0, mults_g); // 0 0 | x db + const __m128i D1 = _mm_mulhi_epi16(B1, mults_g); + const __m128i E0 = _mm_sub_epi8(in0, D0); // x x | x b' + const __m128i E1 = _mm_sub_epi8(in1, D1); + const __m128i F0 = _mm_srli_epi32(C0, 16); // 0 0 | x db + const __m128i F1 = _mm_srli_epi32(C1, 16); + const __m128i G0 = _mm_sub_epi8(E0, F0); // 0 0 | x b' + const __m128i G1 = _mm_sub_epi8(E1, F1); + const __m128i H0 = _mm_and_si128(G0, mask_b); // 0 0 | 0 b + const __m128i H1 = _mm_and_si128(G1, mask_b); + const __m128i I = _mm_packs_epi32(H0, H1); // 0 b' | 0 b' + _mm_storeu_si128((__m128i*)values, I); + for (i = 0; i < SPAN; ++i) ++histo[values[i]]; + } + } + { + const int left_over = tile_width & (SPAN - 1); + if (left_over > 0) { + VP8LCollectColorBlueTransforms_C(argb + tile_width - left_over, stride, + left_over, tile_height, + green_to_blue, red_to_blue, histo); + } + } +} + +static void CollectColorRedTransforms(const uint32_t* argb, int stride, + int tile_width, int tile_height, + int green_to_red, int histo[]) { + const __m128i mults_g = _mm_set_epi16( + 0, CST_5b(green_to_red), 0, CST_5b(green_to_red), + 0, CST_5b(green_to_red), 0, CST_5b(green_to_red)); + const __m128i mask_g = _mm_set1_epi32(0x00ff00); // green mask + const __m128i mask = _mm_set1_epi32(0xff); + + int y; + for (y = 0; y < tile_height; ++y) { + const uint32_t* const src = argb + y * stride; + int i, x; + for (x = 0; x + SPAN <= tile_width; x += SPAN) { + uint16_t values[SPAN]; + const __m128i in0 = _mm_loadu_si128((__m128i*)&src[x + 0]); + const __m128i in1 = _mm_loadu_si128((__m128i*)&src[x + SPAN / 2]); + const __m128i A0 = _mm_and_si128(in0, mask_g); // 0 0 | g 0 + const __m128i A1 = _mm_and_si128(in1, mask_g); + const __m128i B0 = _mm_srli_epi32(in0, 16); // 0 0 | x r + const __m128i B1 = _mm_srli_epi32(in1, 16); + const __m128i C0 = _mm_mulhi_epi16(A0, mults_g); // 0 0 | x dr + const __m128i C1 = _mm_mulhi_epi16(A1, mults_g); + const __m128i E0 = _mm_sub_epi8(B0, C0); // x x | x r' + const __m128i E1 = _mm_sub_epi8(B1, C1); + const __m128i F0 = _mm_and_si128(E0, mask); // 0 0 | 0 r' + const __m128i F1 = _mm_and_si128(E1, mask); + const __m128i I = _mm_packs_epi32(F0, F1); + _mm_storeu_si128((__m128i*)values, I); + for (i = 0; i < SPAN; ++i) ++histo[values[i]]; + } + } + { + const int left_over = tile_width & (SPAN - 1); + if (left_over > 0) { + VP8LCollectColorRedTransforms_C(argb + tile_width - left_over, stride, + left_over, tile_height, + green_to_red, histo); + } + } +} +#undef SPAN + +//------------------------------------------------------------------------------ + +#define LINE_SIZE 16 // 8 or 16 +static void AddVector(const uint32_t* a, const uint32_t* b, uint32_t* out, + int size) { + int i; + assert(size % LINE_SIZE == 0); + for (i = 0; i < size; i += LINE_SIZE) { + const __m128i a0 = _mm_loadu_si128((const __m128i*)&a[i + 0]); + const __m128i a1 = _mm_loadu_si128((const __m128i*)&a[i + 4]); +#if (LINE_SIZE == 16) + const __m128i a2 = _mm_loadu_si128((const __m128i*)&a[i + 8]); + const __m128i a3 = _mm_loadu_si128((const __m128i*)&a[i + 12]); +#endif + const __m128i b0 = _mm_loadu_si128((const __m128i*)&b[i + 0]); + const __m128i b1 = _mm_loadu_si128((const __m128i*)&b[i + 4]); +#if (LINE_SIZE == 16) + const __m128i b2 = _mm_loadu_si128((const __m128i*)&b[i + 8]); + const __m128i b3 = _mm_loadu_si128((const __m128i*)&b[i + 12]); +#endif + _mm_storeu_si128((__m128i*)&out[i + 0], _mm_add_epi32(a0, b0)); + _mm_storeu_si128((__m128i*)&out[i + 4], _mm_add_epi32(a1, b1)); +#if (LINE_SIZE == 16) + _mm_storeu_si128((__m128i*)&out[i + 8], _mm_add_epi32(a2, b2)); + _mm_storeu_si128((__m128i*)&out[i + 12], _mm_add_epi32(a3, b3)); +#endif + } +} + +static void AddVectorEq(const uint32_t* a, uint32_t* out, int size) { + int i; + assert(size % LINE_SIZE == 0); + for (i = 0; i < size; i += LINE_SIZE) { + const __m128i a0 = _mm_loadu_si128((const __m128i*)&a[i + 0]); + const __m128i a1 = _mm_loadu_si128((const __m128i*)&a[i + 4]); +#if (LINE_SIZE == 16) + const __m128i a2 = _mm_loadu_si128((const __m128i*)&a[i + 8]); + const __m128i a3 = _mm_loadu_si128((const __m128i*)&a[i + 12]); +#endif + const __m128i b0 = _mm_loadu_si128((const __m128i*)&out[i + 0]); + const __m128i b1 = _mm_loadu_si128((const __m128i*)&out[i + 4]); +#if (LINE_SIZE == 16) + const __m128i b2 = _mm_loadu_si128((const __m128i*)&out[i + 8]); + const __m128i b3 = _mm_loadu_si128((const __m128i*)&out[i + 12]); +#endif + _mm_storeu_si128((__m128i*)&out[i + 0], _mm_add_epi32(a0, b0)); + _mm_storeu_si128((__m128i*)&out[i + 4], _mm_add_epi32(a1, b1)); +#if (LINE_SIZE == 16) + _mm_storeu_si128((__m128i*)&out[i + 8], _mm_add_epi32(a2, b2)); + _mm_storeu_si128((__m128i*)&out[i + 12], _mm_add_epi32(a3, b3)); +#endif + } +} +#undef LINE_SIZE + +// Note we are adding uint32_t's as *signed* int32's (using _mm_add_epi32). But +// that's ok since the histogram values are less than 1<<28 (max picture size). +static void HistogramAdd(const VP8LHistogram* const a, + const VP8LHistogram* const b, + VP8LHistogram* const out) { + int i; + const int literal_size = VP8LHistogramNumCodes(a->palette_code_bits_); + assert(a->palette_code_bits_ == b->palette_code_bits_); + if (b != out) { + AddVector(a->literal_, b->literal_, out->literal_, NUM_LITERAL_CODES); + AddVector(a->red_, b->red_, out->red_, NUM_LITERAL_CODES); + AddVector(a->blue_, b->blue_, out->blue_, NUM_LITERAL_CODES); + AddVector(a->alpha_, b->alpha_, out->alpha_, NUM_LITERAL_CODES); + } else { + AddVectorEq(a->literal_, out->literal_, NUM_LITERAL_CODES); + AddVectorEq(a->red_, out->red_, NUM_LITERAL_CODES); + AddVectorEq(a->blue_, out->blue_, NUM_LITERAL_CODES); + AddVectorEq(a->alpha_, out->alpha_, NUM_LITERAL_CODES); + } + for (i = NUM_LITERAL_CODES; i < literal_size; ++i) { + out->literal_[i] = a->literal_[i] + b->literal_[i]; + } + for (i = 0; i < NUM_DISTANCE_CODES; ++i) { + out->distance_[i] = a->distance_[i] + b->distance_[i]; + } +} + +//------------------------------------------------------------------------------ +// Entropy + +// Checks whether the X or Y contribution is worth computing and adding. +// Used in loop unrolling. +#define ANALYZE_X_OR_Y(x_or_y, j) \ + do { \ + if (x_or_y[i + j] != 0) retval -= VP8LFastSLog2(x_or_y[i + j]); \ + } while (0) + +// Checks whether the X + Y contribution is worth computing and adding. +// Used in loop unrolling. +#define ANALYZE_XY(j) \ + do { \ + if (tmp[j] != 0) { \ + retval -= VP8LFastSLog2(tmp[j]); \ + ANALYZE_X_OR_Y(X, j); \ + } \ + } while (0) + +static float CombinedShannonEntropy(const int X[256], const int Y[256]) { + int i; + double retval = 0.; + int sumX, sumXY; + int32_t tmp[4]; + __m128i zero = _mm_setzero_si128(); + // Sums up X + Y, 4 ints at a time (and will merge it at the end for sumXY). + __m128i sumXY_128 = zero; + __m128i sumX_128 = zero; + + for (i = 0; i < 256; i += 4) { + const __m128i x = _mm_loadu_si128((const __m128i*)(X + i)); + const __m128i y = _mm_loadu_si128((const __m128i*)(Y + i)); + + // Check if any X is non-zero: this actually provides a speedup as X is + // usually sparse. + if (_mm_movemask_epi8(_mm_cmpeq_epi32(x, zero)) != 0xFFFF) { + const __m128i xy_128 = _mm_add_epi32(x, y); + sumXY_128 = _mm_add_epi32(sumXY_128, xy_128); + + sumX_128 = _mm_add_epi32(sumX_128, x); + + // Analyze the different X + Y. + _mm_storeu_si128((__m128i*)tmp, xy_128); + + ANALYZE_XY(0); + ANALYZE_XY(1); + ANALYZE_XY(2); + ANALYZE_XY(3); + } else { + // X is fully 0, so only deal with Y. + sumXY_128 = _mm_add_epi32(sumXY_128, y); + + ANALYZE_X_OR_Y(Y, 0); + ANALYZE_X_OR_Y(Y, 1); + ANALYZE_X_OR_Y(Y, 2); + ANALYZE_X_OR_Y(Y, 3); + } + } + + // Sum up sumX_128 to get sumX. + _mm_storeu_si128((__m128i*)tmp, sumX_128); + sumX = tmp[3] + tmp[2] + tmp[1] + tmp[0]; + + // Sum up sumXY_128 to get sumXY. + _mm_storeu_si128((__m128i*)tmp, sumXY_128); + sumXY = tmp[3] + tmp[2] + tmp[1] + tmp[0]; + + retval += VP8LFastSLog2(sumX) + VP8LFastSLog2(sumXY); + return (float)retval; +} +#undef ANALYZE_X_OR_Y +#undef ANALYZE_XY + +//------------------------------------------------------------------------------ + +static int VectorMismatch(const uint32_t* const array1, + const uint32_t* const array2, int length) { + int match_len; + + if (length >= 12) { + __m128i A0 = _mm_loadu_si128((const __m128i*)&array1[0]); + __m128i A1 = _mm_loadu_si128((const __m128i*)&array2[0]); + match_len = 0; + do { + // Loop unrolling and early load both provide a speedup of 10% for the + // current function. Also, max_limit can be MAX_LENGTH=4096 at most. + const __m128i cmpA = _mm_cmpeq_epi32(A0, A1); + const __m128i B0 = + _mm_loadu_si128((const __m128i*)&array1[match_len + 4]); + const __m128i B1 = + _mm_loadu_si128((const __m128i*)&array2[match_len + 4]); + if (_mm_movemask_epi8(cmpA) != 0xffff) break; + match_len += 4; + + { + const __m128i cmpB = _mm_cmpeq_epi32(B0, B1); + A0 = _mm_loadu_si128((const __m128i*)&array1[match_len + 4]); + A1 = _mm_loadu_si128((const __m128i*)&array2[match_len + 4]); + if (_mm_movemask_epi8(cmpB) != 0xffff) break; + match_len += 4; + } + } while (match_len + 12 < length); + } else { + match_len = 0; + // Unroll the potential first two loops. + if (length >= 4 && + _mm_movemask_epi8(_mm_cmpeq_epi32( + _mm_loadu_si128((const __m128i*)&array1[0]), + _mm_loadu_si128((const __m128i*)&array2[0]))) == 0xffff) { + match_len = 4; + if (length >= 8 && + _mm_movemask_epi8(_mm_cmpeq_epi32( + _mm_loadu_si128((const __m128i*)&array1[4]), + _mm_loadu_si128((const __m128i*)&array2[4]))) == 0xffff) + match_len = 8; + } + } + + while (match_len < length && array1[match_len] == array2[match_len]) { + ++match_len; + } + return match_len; +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8LEncDspInitSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitSSE2(void) { + VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed; + VP8LTransformColor = TransformColor; + VP8LCollectColorBlueTransforms = CollectColorBlueTransforms; + VP8LCollectColorRedTransforms = CollectColorRedTransforms; + VP8LHistogramAdd = HistogramAdd; + VP8LCombinedShannonEntropy = CombinedShannonEntropy; + VP8LVectorMismatch = VectorMismatch; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(VP8LEncDspInitSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/thirdparty/libwebp/dsp/lossless_enc_sse41.c b/thirdparty/libwebp/dsp/lossless_enc_sse41.c new file mode 100644 index 0000000000..3e493198db --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_enc_sse41.c @@ -0,0 +1,51 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// SSE4.1 variant of methods for lossless encoder +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE41) +#include <assert.h> +#include <smmintrin.h> +#include "./lossless.h" + +//------------------------------------------------------------------------------ +// Subtract-Green Transform + +static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixels) { + int i; + const __m128i kCstShuffle = _mm_set_epi8(-1, 13, -1, 13, -1, 9, -1, 9, + -1, 5, -1, 5, -1, 1, -1, 1); + for (i = 0; i + 4 <= num_pixels; i += 4) { + const __m128i in = _mm_loadu_si128((__m128i*)&argb_data[i]); + const __m128i in_0g0g = _mm_shuffle_epi8(in, kCstShuffle); + const __m128i out = _mm_sub_epi8(in, in_0g0g); + _mm_storeu_si128((__m128i*)&argb_data[i], out); + } + // fallthrough and finish off with plain-C + VP8LSubtractGreenFromBlueAndRed_C(argb_data + i, num_pixels - i); +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8LEncDspInitSSE41(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitSSE41(void) { + VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed; +} + +#else // !WEBP_USE_SSE41 + +WEBP_DSP_INIT_STUB(VP8LEncDspInitSSE41) + +#endif // WEBP_USE_SSE41 diff --git a/thirdparty/libwebp/dsp/lossless_mips_dsp_r2.c b/thirdparty/libwebp/dsp/lossless_mips_dsp_r2.c new file mode 100644 index 0000000000..90aed7f151 --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_mips_dsp_r2.c @@ -0,0 +1,680 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) +// Jovan Zelincevic (jovan.zelincevic@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include "./lossless.h" + +#define MAP_COLOR_FUNCS(FUNC_NAME, TYPE, GET_INDEX, GET_VALUE) \ +static void FUNC_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 >> 2); ++x) { \ + int tmp1, tmp2, tmp3, tmp4; \ + __asm__ volatile ( \ + ".ifc " #TYPE ", uint8_t \n\t" \ + "lbu %[tmp1], 0(%[src]) \n\t" \ + "lbu %[tmp2], 1(%[src]) \n\t" \ + "lbu %[tmp3], 2(%[src]) \n\t" \ + "lbu %[tmp4], 3(%[src]) \n\t" \ + "addiu %[src], %[src], 4 \n\t" \ + ".endif \n\t" \ + ".ifc " #TYPE ", uint32_t \n\t" \ + "lw %[tmp1], 0(%[src]) \n\t" \ + "lw %[tmp2], 4(%[src]) \n\t" \ + "lw %[tmp3], 8(%[src]) \n\t" \ + "lw %[tmp4], 12(%[src]) \n\t" \ + "ext %[tmp1], %[tmp1], 8, 8 \n\t" \ + "ext %[tmp2], %[tmp2], 8, 8 \n\t" \ + "ext %[tmp3], %[tmp3], 8, 8 \n\t" \ + "ext %[tmp4], %[tmp4], 8, 8 \n\t" \ + "addiu %[src], %[src], 16 \n\t" \ + ".endif \n\t" \ + "sll %[tmp1], %[tmp1], 2 \n\t" \ + "sll %[tmp2], %[tmp2], 2 \n\t" \ + "sll %[tmp3], %[tmp3], 2 \n\t" \ + "sll %[tmp4], %[tmp4], 2 \n\t" \ + "lwx %[tmp1], %[tmp1](%[color_map]) \n\t" \ + "lwx %[tmp2], %[tmp2](%[color_map]) \n\t" \ + "lwx %[tmp3], %[tmp3](%[color_map]) \n\t" \ + "lwx %[tmp4], %[tmp4](%[color_map]) \n\t" \ + ".ifc " #TYPE ", uint8_t \n\t" \ + "ext %[tmp1], %[tmp1], 8, 8 \n\t" \ + "ext %[tmp2], %[tmp2], 8, 8 \n\t" \ + "ext %[tmp3], %[tmp3], 8, 8 \n\t" \ + "ext %[tmp4], %[tmp4], 8, 8 \n\t" \ + "sb %[tmp1], 0(%[dst]) \n\t" \ + "sb %[tmp2], 1(%[dst]) \n\t" \ + "sb %[tmp3], 2(%[dst]) \n\t" \ + "sb %[tmp4], 3(%[dst]) \n\t" \ + "addiu %[dst], %[dst], 4 \n\t" \ + ".endif \n\t" \ + ".ifc " #TYPE ", uint32_t \n\t" \ + "sw %[tmp1], 0(%[dst]) \n\t" \ + "sw %[tmp2], 4(%[dst]) \n\t" \ + "sw %[tmp3], 8(%[dst]) \n\t" \ + "sw %[tmp4], 12(%[dst]) \n\t" \ + "addiu %[dst], %[dst], 16 \n\t" \ + ".endif \n\t" \ + : [tmp1]"=&r"(tmp1), [tmp2]"=&r"(tmp2), [tmp3]"=&r"(tmp3), \ + [tmp4]"=&r"(tmp4), [src]"+&r"(src), [dst]"+r"(dst) \ + : [color_map]"r"(color_map) \ + : "memory" \ + ); \ + } \ + for (x = 0; x < (width & 3); ++x) { \ + *dst++ = GET_VALUE(color_map[GET_INDEX(*src++)]); \ + } \ + } \ +} + +MAP_COLOR_FUNCS(MapARGB, uint32_t, VP8GetARGBIndex, VP8GetARGBValue) +MAP_COLOR_FUNCS(MapAlpha, uint8_t, VP8GetAlphaIndex, VP8GetAlphaValue) + +#undef MAP_COLOR_FUNCS + +static WEBP_INLINE uint32_t ClampedAddSubtractFull(uint32_t c0, uint32_t c1, + uint32_t c2) { + int temp0, temp1, temp2, temp3, temp4, temp5; + __asm__ volatile ( + "preceu.ph.qbr %[temp1], %[c0] \n\t" + "preceu.ph.qbl %[temp2], %[c0] \n\t" + "preceu.ph.qbr %[temp3], %[c1] \n\t" + "preceu.ph.qbl %[temp4], %[c1] \n\t" + "preceu.ph.qbr %[temp5], %[c2] \n\t" + "preceu.ph.qbl %[temp0], %[c2] \n\t" + "subq.ph %[temp3], %[temp3], %[temp5] \n\t" + "subq.ph %[temp4], %[temp4], %[temp0] \n\t" + "addq.ph %[temp1], %[temp1], %[temp3] \n\t" + "addq.ph %[temp2], %[temp2], %[temp4] \n\t" + "shll_s.ph %[temp1], %[temp1], 7 \n\t" + "shll_s.ph %[temp2], %[temp2], 7 \n\t" + "precrqu_s.qb.ph %[temp2], %[temp2], %[temp1] \n\t" + : [temp0]"=r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5) + : [c0]"r"(c0), [c1]"r"(c1), [c2]"r"(c2) + : "memory" + ); + return temp2; +} + +static WEBP_INLINE uint32_t ClampedAddSubtractHalf(uint32_t c0, uint32_t c1, + uint32_t c2) { + int temp0, temp1, temp2, temp3, temp4, temp5; + __asm__ volatile ( + "adduh.qb %[temp5], %[c0], %[c1] \n\t" + "preceu.ph.qbr %[temp3], %[c2] \n\t" + "preceu.ph.qbr %[temp1], %[temp5] \n\t" + "preceu.ph.qbl %[temp2], %[temp5] \n\t" + "preceu.ph.qbl %[temp4], %[c2] \n\t" + "subq.ph %[temp3], %[temp1], %[temp3] \n\t" + "subq.ph %[temp4], %[temp2], %[temp4] \n\t" + "shrl.ph %[temp5], %[temp3], 15 \n\t" + "shrl.ph %[temp0], %[temp4], 15 \n\t" + "addq.ph %[temp3], %[temp3], %[temp5] \n\t" + "addq.ph %[temp4], %[temp0], %[temp4] \n\t" + "shra.ph %[temp3], %[temp3], 1 \n\t" + "shra.ph %[temp4], %[temp4], 1 \n\t" + "addq.ph %[temp1], %[temp1], %[temp3] \n\t" + "addq.ph %[temp2], %[temp2], %[temp4] \n\t" + "shll_s.ph %[temp1], %[temp1], 7 \n\t" + "shll_s.ph %[temp2], %[temp2], 7 \n\t" + "precrqu_s.qb.ph %[temp1], %[temp2], %[temp1] \n\t" + : [temp0]"=r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=r"(temp4), [temp5]"=&r"(temp5) + : [c0]"r"(c0), [c1]"r"(c1), [c2]"r"(c2) + : "memory" + ); + return temp1; +} + +static WEBP_INLINE uint32_t Select(uint32_t a, uint32_t b, uint32_t c) { + int temp0, temp1, temp2, temp3, temp4, temp5; + __asm__ volatile ( + "cmpgdu.lt.qb %[temp1], %[c], %[b] \n\t" + "pick.qb %[temp1], %[b], %[c] \n\t" + "pick.qb %[temp2], %[c], %[b] \n\t" + "cmpgdu.lt.qb %[temp4], %[c], %[a] \n\t" + "pick.qb %[temp4], %[a], %[c] \n\t" + "pick.qb %[temp5], %[c], %[a] \n\t" + "subu.qb %[temp3], %[temp1], %[temp2] \n\t" + "subu.qb %[temp0], %[temp4], %[temp5] \n\t" + "raddu.w.qb %[temp3], %[temp3] \n\t" + "raddu.w.qb %[temp0], %[temp0] \n\t" + "subu %[temp3], %[temp3], %[temp0] \n\t" + "slti %[temp0], %[temp3], 0x1 \n\t" + "movz %[a], %[b], %[temp0] \n\t" + : [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp0]"=&r"(temp0), + [a]"+&r"(a) + : [b]"r"(b), [c]"r"(c) + ); + return a; +} + +static WEBP_INLINE uint32_t Average2(uint32_t a0, uint32_t a1) { + __asm__ volatile ( + "adduh.qb %[a0], %[a0], %[a1] \n\t" + : [a0]"+r"(a0) + : [a1]"r"(a1) + ); + return a0; +} + +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 uint32_t Predictor5(uint32_t left, const uint32_t* const top) { + return Average3(left, top[0], top[1]); +} + +static uint32_t Predictor6(uint32_t left, const uint32_t* const top) { + return Average2(left, top[-1]); +} + +static uint32_t Predictor7(uint32_t left, const uint32_t* const top) { + return Average2(left, top[0]); +} + +static uint32_t Predictor8(uint32_t left, const uint32_t* const top) { + (void)left; + return Average2(top[-1], top[0]); +} + +static uint32_t Predictor9(uint32_t left, const uint32_t* const top) { + (void)left; + return Average2(top[0], top[1]); +} + +static uint32_t Predictor10(uint32_t left, const uint32_t* const top) { + return Average4(left, top[-1], top[0], top[1]); +} + +static uint32_t Predictor11(uint32_t left, const uint32_t* const top) { + return Select(top[0], left, top[-1]); +} + +static uint32_t Predictor12(uint32_t left, const uint32_t* const top) { + return ClampedAddSubtractFull(left, top[0], top[-1]); +} + +static uint32_t Predictor13(uint32_t left, const uint32_t* const top) { + return ClampedAddSubtractHalf(left, top[0], top[-1]); +} + +// Add green to blue and red channels (i.e. perform the inverse transform of +// 'subtract green'). +static void AddGreenToBlueAndRed(uint32_t* data, int num_pixels) { + uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; + uint32_t* const p_loop1_end = data + (num_pixels & ~3); + uint32_t* const p_loop2_end = data + num_pixels; + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[data], %[p_loop1_end], 3f \n\t" + " nop \n\t" + "0: \n\t" + "lw %[temp0], 0(%[data]) \n\t" + "lw %[temp1], 4(%[data]) \n\t" + "lw %[temp2], 8(%[data]) \n\t" + "lw %[temp3], 12(%[data]) \n\t" + "ext %[temp4], %[temp0], 8, 8 \n\t" + "ext %[temp5], %[temp1], 8, 8 \n\t" + "ext %[temp6], %[temp2], 8, 8 \n\t" + "ext %[temp7], %[temp3], 8, 8 \n\t" + "addiu %[data], %[data], 16 \n\t" + "replv.ph %[temp4], %[temp4] \n\t" + "replv.ph %[temp5], %[temp5] \n\t" + "replv.ph %[temp6], %[temp6] \n\t" + "replv.ph %[temp7], %[temp7] \n\t" + "addu.qb %[temp0], %[temp0], %[temp4] \n\t" + "addu.qb %[temp1], %[temp1], %[temp5] \n\t" + "addu.qb %[temp2], %[temp2], %[temp6] \n\t" + "addu.qb %[temp3], %[temp3], %[temp7] \n\t" + "sw %[temp0], -16(%[data]) \n\t" + "sw %[temp1], -12(%[data]) \n\t" + "sw %[temp2], -8(%[data]) \n\t" + "bne %[data], %[p_loop1_end], 0b \n\t" + " sw %[temp3], -4(%[data]) \n\t" + "3: \n\t" + "beq %[data], %[p_loop2_end], 2f \n\t" + " nop \n\t" + "1: \n\t" + "lw %[temp0], 0(%[data]) \n\t" + "addiu %[data], %[data], 4 \n\t" + "ext %[temp4], %[temp0], 8, 8 \n\t" + "replv.ph %[temp4], %[temp4] \n\t" + "addu.qb %[temp0], %[temp0], %[temp4] \n\t" + "bne %[data], %[p_loop2_end], 1b \n\t" + " sw %[temp0], -4(%[data]) \n\t" + "2: \n\t" + ".set pop \n\t" + : [data]"+&r"(data), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), + [temp5]"=&r"(temp5), [temp6]"=&r"(temp6), [temp7]"=&r"(temp7) + : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) + : "memory" + ); +} + +static void TransformColorInverse(const VP8LMultipliers* const m, + uint32_t* data, int num_pixels) { + int temp0, temp1, temp2, temp3, temp4, temp5; + uint32_t argb, argb1, new_red; + const uint32_t G_to_R = m->green_to_red_; + const uint32_t G_to_B = m->green_to_blue_; + const uint32_t R_to_B = m->red_to_blue_; + uint32_t* const p_loop_end = data + (num_pixels & ~1); + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[data], %[p_loop_end], 1f \n\t" + " nop \n\t" + "replv.ph %[temp0], %[G_to_R] \n\t" + "replv.ph %[temp1], %[G_to_B] \n\t" + "replv.ph %[temp2], %[R_to_B] \n\t" + "shll.ph %[temp0], %[temp0], 8 \n\t" + "shll.ph %[temp1], %[temp1], 8 \n\t" + "shll.ph %[temp2], %[temp2], 8 \n\t" + "shra.ph %[temp0], %[temp0], 8 \n\t" + "shra.ph %[temp1], %[temp1], 8 \n\t" + "shra.ph %[temp2], %[temp2], 8 \n\t" + "0: \n\t" + "lw %[argb], 0(%[data]) \n\t" + "lw %[argb1], 4(%[data]) \n\t" + "addiu %[data], %[data], 8 \n\t" + "precrq.qb.ph %[temp3], %[argb], %[argb1] \n\t" + "preceu.ph.qbra %[temp3], %[temp3] \n\t" + "shll.ph %[temp3], %[temp3], 8 \n\t" + "shra.ph %[temp3], %[temp3], 8 \n\t" + "mul.ph %[temp5], %[temp3], %[temp0] \n\t" + "mul.ph %[temp3], %[temp3], %[temp1] \n\t" + "precrq.ph.w %[new_red], %[argb], %[argb1] \n\t" + "ins %[argb1], %[argb], 16, 16 \n\t" + "shra.ph %[temp5], %[temp5], 5 \n\t" + "shra.ph %[temp3], %[temp3], 5 \n\t" + "addu.ph %[new_red], %[new_red], %[temp5] \n\t" + "addu.ph %[argb1], %[argb1], %[temp3] \n\t" + "preceu.ph.qbra %[temp5], %[new_red] \n\t" + "shll.ph %[temp4], %[temp5], 8 \n\t" + "shra.ph %[temp4], %[temp4], 8 \n\t" + "mul.ph %[temp4], %[temp4], %[temp2] \n\t" + "sb %[temp5], -2(%[data]) \n\t" + "sra %[temp5], %[temp5], 16 \n\t" + "shra.ph %[temp4], %[temp4], 5 \n\t" + "addu.ph %[argb1], %[argb1], %[temp4] \n\t" + "preceu.ph.qbra %[temp3], %[argb1] \n\t" + "sb %[temp5], -6(%[data]) \n\t" + "sb %[temp3], -4(%[data]) \n\t" + "sra %[temp3], %[temp3], 16 \n\t" + "bne %[data], %[p_loop_end], 0b \n\t" + " sb %[temp3], -8(%[data]) \n\t" + "1: \n\t" + ".set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [new_red]"=&r"(new_red), [argb]"=&r"(argb), + [argb1]"=&r"(argb1), [data]"+&r"(data) + : [G_to_R]"r"(G_to_R), [R_to_B]"r"(R_to_B), + [G_to_B]"r"(G_to_B), [p_loop_end]"r"(p_loop_end) + : "memory", "hi", "lo" + ); + + // Fall-back to C-version for left-overs. + if (num_pixels & 1) VP8LTransformColorInverse_C(m, data, 1); +} + +static void ConvertBGRAToRGB(const uint32_t* src, + int num_pixels, uint8_t* dst) { + int temp0, temp1, temp2, temp3; + const uint32_t* const p_loop1_end = src + (num_pixels & ~3); + const uint32_t* const p_loop2_end = src + num_pixels; + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[src], %[p_loop1_end], 3f \n\t" + " nop \n\t" + "0: \n\t" + "lw %[temp3], 12(%[src]) \n\t" + "lw %[temp2], 8(%[src]) \n\t" + "lw %[temp1], 4(%[src]) \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "ins %[temp3], %[temp2], 24, 8 \n\t" + "sll %[temp2], %[temp2], 8 \n\t" + "rotr %[temp3], %[temp3], 16 \n\t" + "ins %[temp2], %[temp1], 0, 16 \n\t" + "sll %[temp1], %[temp1], 8 \n\t" + "wsbh %[temp3], %[temp3] \n\t" + "balign %[temp0], %[temp1], 1 \n\t" + "wsbh %[temp2], %[temp2] \n\t" + "wsbh %[temp0], %[temp0] \n\t" + "usw %[temp3], 8(%[dst]) \n\t" + "rotr %[temp0], %[temp0], 16 \n\t" + "usw %[temp2], 4(%[dst]) \n\t" + "addiu %[src], %[src], 16 \n\t" + "usw %[temp0], 0(%[dst]) \n\t" + "bne %[src], %[p_loop1_end], 0b \n\t" + " addiu %[dst], %[dst], 12 \n\t" + "3: \n\t" + "beq %[src], %[p_loop2_end], 2f \n\t" + " nop \n\t" + "1: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "addiu %[src], %[src], 4 \n\t" + "wsbh %[temp1], %[temp0] \n\t" + "addiu %[dst], %[dst], 3 \n\t" + "ush %[temp1], -2(%[dst]) \n\t" + "sra %[temp0], %[temp0], 16 \n\t" + "bne %[src], %[p_loop2_end], 1b \n\t" + " sb %[temp0], -3(%[dst]) \n\t" + "2: \n\t" + ".set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [dst]"+&r"(dst), [src]"+&r"(src) + : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) + : "memory" + ); +} + +static void ConvertBGRAToRGBA(const uint32_t* src, + int num_pixels, uint8_t* dst) { + int temp0, temp1, temp2, temp3; + const uint32_t* const p_loop1_end = src + (num_pixels & ~3); + const uint32_t* const p_loop2_end = src + num_pixels; + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[src], %[p_loop1_end], 3f \n\t" + " nop \n\t" + "0: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "lw %[temp1], 4(%[src]) \n\t" + "lw %[temp2], 8(%[src]) \n\t" + "lw %[temp3], 12(%[src]) \n\t" + "wsbh %[temp0], %[temp0] \n\t" + "wsbh %[temp1], %[temp1] \n\t" + "wsbh %[temp2], %[temp2] \n\t" + "wsbh %[temp3], %[temp3] \n\t" + "addiu %[src], %[src], 16 \n\t" + "balign %[temp0], %[temp0], 1 \n\t" + "balign %[temp1], %[temp1], 1 \n\t" + "balign %[temp2], %[temp2], 1 \n\t" + "balign %[temp3], %[temp3], 1 \n\t" + "usw %[temp0], 0(%[dst]) \n\t" + "usw %[temp1], 4(%[dst]) \n\t" + "usw %[temp2], 8(%[dst]) \n\t" + "usw %[temp3], 12(%[dst]) \n\t" + "bne %[src], %[p_loop1_end], 0b \n\t" + " addiu %[dst], %[dst], 16 \n\t" + "3: \n\t" + "beq %[src], %[p_loop2_end], 2f \n\t" + " nop \n\t" + "1: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "wsbh %[temp0], %[temp0] \n\t" + "addiu %[src], %[src], 4 \n\t" + "balign %[temp0], %[temp0], 1 \n\t" + "usw %[temp0], 0(%[dst]) \n\t" + "bne %[src], %[p_loop2_end], 1b \n\t" + " addiu %[dst], %[dst], 4 \n\t" + "2: \n\t" + ".set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [dst]"+&r"(dst), [src]"+&r"(src) + : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) + : "memory" + ); +} + +static void ConvertBGRAToRGBA4444(const uint32_t* src, + int num_pixels, uint8_t* dst) { + int temp0, temp1, temp2, temp3, temp4, temp5; + const uint32_t* const p_loop1_end = src + (num_pixels & ~3); + const uint32_t* const p_loop2_end = src + num_pixels; + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[src], %[p_loop1_end], 3f \n\t" + " nop \n\t" + "0: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "lw %[temp1], 4(%[src]) \n\t" + "lw %[temp2], 8(%[src]) \n\t" + "lw %[temp3], 12(%[src]) \n\t" + "ext %[temp4], %[temp0], 28, 4 \n\t" + "ext %[temp5], %[temp0], 12, 4 \n\t" + "ins %[temp0], %[temp4], 0, 4 \n\t" + "ext %[temp4], %[temp1], 28, 4 \n\t" + "ins %[temp0], %[temp5], 16, 4 \n\t" + "ext %[temp5], %[temp1], 12, 4 \n\t" + "ins %[temp1], %[temp4], 0, 4 \n\t" + "ext %[temp4], %[temp2], 28, 4 \n\t" + "ins %[temp1], %[temp5], 16, 4 \n\t" + "ext %[temp5], %[temp2], 12, 4 \n\t" + "ins %[temp2], %[temp4], 0, 4 \n\t" + "ext %[temp4], %[temp3], 28, 4 \n\t" + "ins %[temp2], %[temp5], 16, 4 \n\t" + "ext %[temp5], %[temp3], 12, 4 \n\t" + "ins %[temp3], %[temp4], 0, 4 \n\t" + "precr.qb.ph %[temp1], %[temp1], %[temp0] \n\t" + "ins %[temp3], %[temp5], 16, 4 \n\t" + "addiu %[src], %[src], 16 \n\t" + "precr.qb.ph %[temp3], %[temp3], %[temp2] \n\t" +#ifdef WEBP_SWAP_16BIT_CSP + "usw %[temp1], 0(%[dst]) \n\t" + "usw %[temp3], 4(%[dst]) \n\t" +#else + "wsbh %[temp1], %[temp1] \n\t" + "wsbh %[temp3], %[temp3] \n\t" + "usw %[temp1], 0(%[dst]) \n\t" + "usw %[temp3], 4(%[dst]) \n\t" +#endif + "bne %[src], %[p_loop1_end], 0b \n\t" + " addiu %[dst], %[dst], 8 \n\t" + "3: \n\t" + "beq %[src], %[p_loop2_end], 2f \n\t" + " nop \n\t" + "1: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "ext %[temp4], %[temp0], 28, 4 \n\t" + "ext %[temp5], %[temp0], 12, 4 \n\t" + "ins %[temp0], %[temp4], 0, 4 \n\t" + "ins %[temp0], %[temp5], 16, 4 \n\t" + "addiu %[src], %[src], 4 \n\t" + "precr.qb.ph %[temp0], %[temp0], %[temp0] \n\t" +#ifdef WEBP_SWAP_16BIT_CSP + "ush %[temp0], 0(%[dst]) \n\t" +#else + "wsbh %[temp0], %[temp0] \n\t" + "ush %[temp0], 0(%[dst]) \n\t" +#endif + "bne %[src], %[p_loop2_end], 1b \n\t" + " addiu %[dst], %[dst], 2 \n\t" + "2: \n\t" + ".set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [dst]"+&r"(dst), [src]"+&r"(src) + : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) + : "memory" + ); +} + +static void ConvertBGRAToRGB565(const uint32_t* src, + int num_pixels, uint8_t* dst) { + int temp0, temp1, temp2, temp3, temp4, temp5; + const uint32_t* const p_loop1_end = src + (num_pixels & ~3); + const uint32_t* const p_loop2_end = src + num_pixels; + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[src], %[p_loop1_end], 3f \n\t" + " nop \n\t" + "0: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "lw %[temp1], 4(%[src]) \n\t" + "lw %[temp2], 8(%[src]) \n\t" + "lw %[temp3], 12(%[src]) \n\t" + "ext %[temp4], %[temp0], 8, 16 \n\t" + "ext %[temp5], %[temp0], 5, 11 \n\t" + "ext %[temp0], %[temp0], 3, 5 \n\t" + "ins %[temp4], %[temp5], 0, 11 \n\t" + "ext %[temp5], %[temp1], 5, 11 \n\t" + "ins %[temp4], %[temp0], 0, 5 \n\t" + "ext %[temp0], %[temp1], 8, 16 \n\t" + "ext %[temp1], %[temp1], 3, 5 \n\t" + "ins %[temp0], %[temp5], 0, 11 \n\t" + "ext %[temp5], %[temp2], 5, 11 \n\t" + "ins %[temp0], %[temp1], 0, 5 \n\t" + "ext %[temp1], %[temp2], 8, 16 \n\t" + "ext %[temp2], %[temp2], 3, 5 \n\t" + "ins %[temp1], %[temp5], 0, 11 \n\t" + "ext %[temp5], %[temp3], 5, 11 \n\t" + "ins %[temp1], %[temp2], 0, 5 \n\t" + "ext %[temp2], %[temp3], 8, 16 \n\t" + "ext %[temp3], %[temp3], 3, 5 \n\t" + "ins %[temp2], %[temp5], 0, 11 \n\t" + "append %[temp0], %[temp4], 16 \n\t" + "ins %[temp2], %[temp3], 0, 5 \n\t" + "addiu %[src], %[src], 16 \n\t" + "append %[temp2], %[temp1], 16 \n\t" +#ifdef WEBP_SWAP_16BIT_CSP + "usw %[temp0], 0(%[dst]) \n\t" + "usw %[temp2], 4(%[dst]) \n\t" +#else + "wsbh %[temp0], %[temp0] \n\t" + "wsbh %[temp2], %[temp2] \n\t" + "usw %[temp0], 0(%[dst]) \n\t" + "usw %[temp2], 4(%[dst]) \n\t" +#endif + "bne %[src], %[p_loop1_end], 0b \n\t" + " addiu %[dst], %[dst], 8 \n\t" + "3: \n\t" + "beq %[src], %[p_loop2_end], 2f \n\t" + " nop \n\t" + "1: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "ext %[temp4], %[temp0], 8, 16 \n\t" + "ext %[temp5], %[temp0], 5, 11 \n\t" + "ext %[temp0], %[temp0], 3, 5 \n\t" + "ins %[temp4], %[temp5], 0, 11 \n\t" + "addiu %[src], %[src], 4 \n\t" + "ins %[temp4], %[temp0], 0, 5 \n\t" +#ifdef WEBP_SWAP_16BIT_CSP + "ush %[temp4], 0(%[dst]) \n\t" +#else + "wsbh %[temp4], %[temp4] \n\t" + "ush %[temp4], 0(%[dst]) \n\t" +#endif + "bne %[src], %[p_loop2_end], 1b \n\t" + " addiu %[dst], %[dst], 2 \n\t" + "2: \n\t" + ".set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), + [dst]"+&r"(dst), [src]"+&r"(src) + : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) + : "memory" + ); +} + +static void ConvertBGRAToBGR(const uint32_t* src, + int num_pixels, uint8_t* dst) { + int temp0, temp1, temp2, temp3; + const uint32_t* const p_loop1_end = src + (num_pixels & ~3); + const uint32_t* const p_loop2_end = src + num_pixels; + __asm__ volatile ( + ".set push \n\t" + ".set noreorder \n\t" + "beq %[src], %[p_loop1_end], 3f \n\t" + " nop \n\t" + "0: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "lw %[temp1], 4(%[src]) \n\t" + "lw %[temp2], 8(%[src]) \n\t" + "lw %[temp3], 12(%[src]) \n\t" + "ins %[temp0], %[temp1], 24, 8 \n\t" + "sra %[temp1], %[temp1], 8 \n\t" + "ins %[temp1], %[temp2], 16, 16 \n\t" + "sll %[temp2], %[temp2], 8 \n\t" + "balign %[temp3], %[temp2], 1 \n\t" + "addiu %[src], %[src], 16 \n\t" + "usw %[temp0], 0(%[dst]) \n\t" + "usw %[temp1], 4(%[dst]) \n\t" + "usw %[temp3], 8(%[dst]) \n\t" + "bne %[src], %[p_loop1_end], 0b \n\t" + " addiu %[dst], %[dst], 12 \n\t" + "3: \n\t" + "beq %[src], %[p_loop2_end], 2f \n\t" + " nop \n\t" + "1: \n\t" + "lw %[temp0], 0(%[src]) \n\t" + "addiu %[src], %[src], 4 \n\t" + "addiu %[dst], %[dst], 3 \n\t" + "ush %[temp0], -3(%[dst]) \n\t" + "sra %[temp0], %[temp0], 16 \n\t" + "bne %[src], %[p_loop2_end], 1b \n\t" + " sb %[temp0], -1(%[dst]) \n\t" + "2: \n\t" + ".set pop \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), + [temp3]"=&r"(temp3), [dst]"+&r"(dst), [src]"+&r"(src) + : [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end) + : "memory" + ); +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8LDspInitMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitMIPSdspR2(void) { + VP8LMapColor32b = MapARGB; + VP8LMapColor8b = MapAlpha; + 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; + VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed; + VP8LTransformColorInverse = TransformColorInverse; + VP8LConvertBGRAToRGB = ConvertBGRAToRGB; + VP8LConvertBGRAToRGBA = ConvertBGRAToRGBA; + VP8LConvertBGRAToRGBA4444 = ConvertBGRAToRGBA4444; + VP8LConvertBGRAToRGB565 = ConvertBGRAToRGB565; + VP8LConvertBGRAToBGR = ConvertBGRAToBGR; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(VP8LDspInitMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/lossless_neon.c b/thirdparty/libwebp/dsp/lossless_neon.c new file mode 100644 index 0000000000..6faccb8f97 --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_neon.c @@ -0,0 +1,269 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// NEON variant of methods for lossless decoder +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_NEON) + +#include <arm_neon.h> + +#include "./lossless.h" +#include "./neon.h" + +//------------------------------------------------------------------------------ +// Colorspace conversion functions + +#if !defined(WORK_AROUND_GCC) +// gcc 4.6.0 had some trouble (NDK-r9) with this code. We only use it for +// gcc-4.8.x at least. +static void ConvertBGRAToRGBA(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const end = src + (num_pixels & ~15); + for (; src < end; src += 16) { + uint8x16x4_t pixel = vld4q_u8((uint8_t*)src); + // swap B and R. (VSWP d0,d2 has no intrinsics equivalent!) + const uint8x16_t tmp = pixel.val[0]; + pixel.val[0] = pixel.val[2]; + pixel.val[2] = tmp; + vst4q_u8(dst, pixel); + dst += 64; + } + VP8LConvertBGRAToRGBA_C(src, num_pixels & 15, dst); // left-overs +} + +static void ConvertBGRAToBGR(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const end = src + (num_pixels & ~15); + for (; src < end; src += 16) { + const uint8x16x4_t pixel = vld4q_u8((uint8_t*)src); + const uint8x16x3_t tmp = { { pixel.val[0], pixel.val[1], pixel.val[2] } }; + vst3q_u8(dst, tmp); + dst += 48; + } + VP8LConvertBGRAToBGR_C(src, num_pixels & 15, dst); // left-overs +} + +static void ConvertBGRAToRGB(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const end = src + (num_pixels & ~15); + for (; src < end; src += 16) { + const uint8x16x4_t pixel = vld4q_u8((uint8_t*)src); + const uint8x16x3_t tmp = { { pixel.val[2], pixel.val[1], pixel.val[0] } }; + vst3q_u8(dst, tmp); + dst += 48; + } + VP8LConvertBGRAToRGB_C(src, num_pixels & 15, dst); // left-overs +} + +#else // WORK_AROUND_GCC + +// gcc-4.6.0 fallback + +static const uint8_t kRGBAShuffle[8] = { 2, 1, 0, 3, 6, 5, 4, 7 }; + +static void ConvertBGRAToRGBA(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const end = src + (num_pixels & ~1); + const uint8x8_t shuffle = vld1_u8(kRGBAShuffle); + for (; src < end; src += 2) { + const uint8x8_t pixels = vld1_u8((uint8_t*)src); + vst1_u8(dst, vtbl1_u8(pixels, shuffle)); + dst += 8; + } + VP8LConvertBGRAToRGBA_C(src, num_pixels & 1, dst); // left-overs +} + +static const uint8_t kBGRShuffle[3][8] = { + { 0, 1, 2, 4, 5, 6, 8, 9 }, + { 10, 12, 13, 14, 16, 17, 18, 20 }, + { 21, 22, 24, 25, 26, 28, 29, 30 } +}; + +static void ConvertBGRAToBGR(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const end = src + (num_pixels & ~7); + const uint8x8_t shuffle0 = vld1_u8(kBGRShuffle[0]); + const uint8x8_t shuffle1 = vld1_u8(kBGRShuffle[1]); + const uint8x8_t shuffle2 = vld1_u8(kBGRShuffle[2]); + for (; src < end; src += 8) { + uint8x8x4_t pixels; + INIT_VECTOR4(pixels, + vld1_u8((const uint8_t*)(src + 0)), + vld1_u8((const uint8_t*)(src + 2)), + vld1_u8((const uint8_t*)(src + 4)), + vld1_u8((const uint8_t*)(src + 6))); + vst1_u8(dst + 0, vtbl4_u8(pixels, shuffle0)); + vst1_u8(dst + 8, vtbl4_u8(pixels, shuffle1)); + vst1_u8(dst + 16, vtbl4_u8(pixels, shuffle2)); + dst += 8 * 3; + } + VP8LConvertBGRAToBGR_C(src, num_pixels & 7, dst); // left-overs +} + +static const uint8_t kRGBShuffle[3][8] = { + { 2, 1, 0, 6, 5, 4, 10, 9 }, + { 8, 14, 13, 12, 18, 17, 16, 22 }, + { 21, 20, 26, 25, 24, 30, 29, 28 } +}; + +static void ConvertBGRAToRGB(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const uint32_t* const end = src + (num_pixels & ~7); + const uint8x8_t shuffle0 = vld1_u8(kRGBShuffle[0]); + const uint8x8_t shuffle1 = vld1_u8(kRGBShuffle[1]); + const uint8x8_t shuffle2 = vld1_u8(kRGBShuffle[2]); + for (; src < end; src += 8) { + uint8x8x4_t pixels; + INIT_VECTOR4(pixels, + vld1_u8((const uint8_t*)(src + 0)), + vld1_u8((const uint8_t*)(src + 2)), + vld1_u8((const uint8_t*)(src + 4)), + vld1_u8((const uint8_t*)(src + 6))); + vst1_u8(dst + 0, vtbl4_u8(pixels, shuffle0)); + vst1_u8(dst + 8, vtbl4_u8(pixels, shuffle1)); + vst1_u8(dst + 16, vtbl4_u8(pixels, shuffle2)); + dst += 8 * 3; + } + VP8LConvertBGRAToRGB_C(src, num_pixels & 7, dst); // left-overs +} + +#endif // !WORK_AROUND_GCC + +//------------------------------------------------------------------------------ +// Subtract-Green Transform + +// vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use +// non-standard versions there. +#if defined(__APPLE__) && defined(__aarch64__) && \ + defined(__apple_build_version__) && (__apple_build_version__< 6020037) +#define USE_VTBLQ +#endif + +#ifdef USE_VTBLQ +// 255 = byte will be zeroed +static const uint8_t kGreenShuffle[16] = { + 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255 +}; + +static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb, + const uint8x16_t shuffle) { + return vcombine_u8(vtbl1q_u8(argb, vget_low_u8(shuffle)), + vtbl1q_u8(argb, vget_high_u8(shuffle))); +} +#else // !USE_VTBLQ +// 255 = byte will be zeroed +static const uint8_t kGreenShuffle[8] = { 1, 255, 1, 255, 5, 255, 5, 255 }; + +static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb, + const uint8x8_t shuffle) { + return vcombine_u8(vtbl1_u8(vget_low_u8(argb), shuffle), + vtbl1_u8(vget_high_u8(argb), shuffle)); +} +#endif // USE_VTBLQ + +static void AddGreenToBlueAndRed(uint32_t* argb_data, int num_pixels) { + const uint32_t* const end = argb_data + (num_pixels & ~3); +#ifdef USE_VTBLQ + const uint8x16_t shuffle = vld1q_u8(kGreenShuffle); +#else + const uint8x8_t shuffle = vld1_u8(kGreenShuffle); +#endif + for (; argb_data < end; argb_data += 4) { + const uint8x16_t argb = vld1q_u8((uint8_t*)argb_data); + const uint8x16_t greens = DoGreenShuffle(argb, shuffle); + vst1q_u8((uint8_t*)argb_data, vaddq_u8(argb, greens)); + } + // fallthrough and finish off with plain-C + VP8LAddGreenToBlueAndRed_C(argb_data, num_pixels & 3); +} + +//------------------------------------------------------------------------------ +// Color Transform + +static void TransformColorInverse(const VP8LMultipliers* const m, + uint32_t* argb_data, int num_pixels) { + // sign-extended multiplying constants, pre-shifted by 6. +#define CST(X) (((int16_t)(m->X << 8)) >> 6) + const int16_t rb[8] = { + CST(green_to_blue_), CST(green_to_red_), + CST(green_to_blue_), CST(green_to_red_), + CST(green_to_blue_), CST(green_to_red_), + CST(green_to_blue_), CST(green_to_red_) + }; + const int16x8_t mults_rb = vld1q_s16(rb); + const int16_t b2[8] = { + 0, CST(red_to_blue_), 0, CST(red_to_blue_), + 0, CST(red_to_blue_), 0, CST(red_to_blue_), + }; + const int16x8_t mults_b2 = vld1q_s16(b2); +#undef CST +#ifdef USE_VTBLQ + static const uint8_t kg0g0[16] = { + 255, 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13 + }; + const uint8x16_t shuffle = vld1q_u8(kg0g0); +#else + static const uint8_t k0g0g[8] = { 255, 1, 255, 1, 255, 5, 255, 5 }; + const uint8x8_t shuffle = vld1_u8(k0g0g); +#endif + const uint32x4_t mask_ag = vdupq_n_u32(0xff00ff00u); + int i; + for (i = 0; i + 4 <= num_pixels; i += 4) { + const uint8x16_t in = vld1q_u8((uint8_t*)(argb_data + i)); + const uint32x4_t a0g0 = vandq_u32(vreinterpretq_u32_u8(in), mask_ag); + // 0 g 0 g + const uint8x16_t greens = DoGreenShuffle(in, shuffle); + // x dr x db1 + const int16x8_t A = vqdmulhq_s16(vreinterpretq_s16_u8(greens), mults_rb); + // x r' x b' + const int8x16_t B = vaddq_s8(vreinterpretq_s8_u8(in), + vreinterpretq_s8_s16(A)); + // r' 0 b' 0 + const int16x8_t C = vshlq_n_s16(vreinterpretq_s16_s8(B), 8); + // x db2 0 0 + const int16x8_t D = vqdmulhq_s16(C, mults_b2); + // 0 x db2 0 + const uint32x4_t E = vshrq_n_u32(vreinterpretq_u32_s16(D), 8); + // r' x b'' 0 + const int8x16_t F = vaddq_s8(vreinterpretq_s8_u32(E), + vreinterpretq_s8_s16(C)); + // 0 r' 0 b'' + const uint16x8_t G = vshrq_n_u16(vreinterpretq_u16_s8(F), 8); + const uint32x4_t out = vorrq_u32(vreinterpretq_u32_u16(G), a0g0); + vst1q_u32(argb_data + i, out); + } + // Fall-back to C-version for left-overs. + VP8LTransformColorInverse_C(m, argb_data + i, num_pixels - i); +} + +#undef USE_VTBLQ + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8LDspInitNEON(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitNEON(void) { + VP8LConvertBGRAToRGBA = ConvertBGRAToRGBA; + VP8LConvertBGRAToBGR = ConvertBGRAToBGR; + VP8LConvertBGRAToRGB = ConvertBGRAToRGB; + + VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed; + VP8LTransformColorInverse = TransformColorInverse; +} + +#else // !WEBP_USE_NEON + +WEBP_DSP_INIT_STUB(VP8LDspInitNEON) + +#endif // WEBP_USE_NEON diff --git a/thirdparty/libwebp/dsp/lossless_sse2.c b/thirdparty/libwebp/dsp/lossless_sse2.c new file mode 100644 index 0000000000..2d016c2911 --- /dev/null +++ b/thirdparty/libwebp/dsp/lossless_sse2.c @@ -0,0 +1,372 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 variant of methods for lossless decoder +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) +#include <assert.h> +#include <emmintrin.h> +#include "./lossless.h" + +//------------------------------------------------------------------------------ +// Predictor Transform + +static WEBP_INLINE uint32_t ClampedAddSubtractFull(uint32_t c0, uint32_t c1, + uint32_t c2) { + const __m128i zero = _mm_setzero_si128(); + const __m128i C0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c0), zero); + const __m128i C1 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c1), zero); + const __m128i C2 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c2), zero); + const __m128i V1 = _mm_add_epi16(C0, C1); + const __m128i V2 = _mm_sub_epi16(V1, C2); + const __m128i b = _mm_packus_epi16(V2, V2); + const uint32_t output = _mm_cvtsi128_si32(b); + return output; +} + +static WEBP_INLINE uint32_t ClampedAddSubtractHalf(uint32_t c0, uint32_t c1, + uint32_t c2) { + const __m128i zero = _mm_setzero_si128(); + const __m128i C0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c0), zero); + const __m128i C1 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c1), zero); + const __m128i B0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c2), zero); + const __m128i avg = _mm_add_epi16(C1, C0); + const __m128i A0 = _mm_srli_epi16(avg, 1); + const __m128i A1 = _mm_sub_epi16(A0, B0); + const __m128i BgtA = _mm_cmpgt_epi16(B0, A0); + const __m128i A2 = _mm_sub_epi16(A1, BgtA); + const __m128i A3 = _mm_srai_epi16(A2, 1); + const __m128i A4 = _mm_add_epi16(A0, A3); + const __m128i A5 = _mm_packus_epi16(A4, A4); + const uint32_t output = _mm_cvtsi128_si32(A5); + return output; +} + +static WEBP_INLINE uint32_t Select(uint32_t a, uint32_t b, uint32_t c) { + int pa_minus_pb; + const __m128i zero = _mm_setzero_si128(); + const __m128i A0 = _mm_cvtsi32_si128(a); + const __m128i B0 = _mm_cvtsi32_si128(b); + const __m128i C0 = _mm_cvtsi32_si128(c); + const __m128i AC0 = _mm_subs_epu8(A0, C0); + const __m128i CA0 = _mm_subs_epu8(C0, A0); + const __m128i BC0 = _mm_subs_epu8(B0, C0); + const __m128i CB0 = _mm_subs_epu8(C0, B0); + const __m128i AC = _mm_or_si128(AC0, CA0); + const __m128i BC = _mm_or_si128(BC0, CB0); + const __m128i pa = _mm_unpacklo_epi8(AC, zero); // |a - c| + const __m128i pb = _mm_unpacklo_epi8(BC, zero); // |b - c| + const __m128i diff = _mm_sub_epi16(pb, pa); + { + int16_t out[8]; + _mm_storeu_si128((__m128i*)out, diff); + pa_minus_pb = out[0] + out[1] + out[2] + out[3]; + } + return (pa_minus_pb <= 0) ? a : b; +} + +static WEBP_INLINE __m128i Average2_128i(uint32_t a0, uint32_t a1) { + const __m128i zero = _mm_setzero_si128(); + const __m128i A0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(a0), zero); + const __m128i A1 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(a1), zero); + const __m128i sum = _mm_add_epi16(A1, A0); + const __m128i avg = _mm_srli_epi16(sum, 1); + return avg; +} + +static WEBP_INLINE uint32_t Average2(uint32_t a0, uint32_t a1) { + const __m128i avg = Average2_128i(a0, a1); + const __m128i A2 = _mm_packus_epi16(avg, avg); + const uint32_t output = _mm_cvtsi128_si32(A2); + return output; +} + +static WEBP_INLINE uint32_t Average3(uint32_t a0, uint32_t a1, uint32_t a2) { + const __m128i zero = _mm_setzero_si128(); + const __m128i avg1 = Average2_128i(a0, a2); + const __m128i A1 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(a1), zero); + const __m128i sum = _mm_add_epi16(avg1, A1); + const __m128i avg2 = _mm_srli_epi16(sum, 1); + const __m128i A2 = _mm_packus_epi16(avg2, avg2); + const uint32_t output = _mm_cvtsi128_si32(A2); + return output; +} + +static WEBP_INLINE uint32_t Average4(uint32_t a0, uint32_t a1, + uint32_t a2, uint32_t a3) { + const __m128i avg1 = Average2_128i(a0, a1); + const __m128i avg2 = Average2_128i(a2, a3); + const __m128i sum = _mm_add_epi16(avg2, avg1); + const __m128i avg3 = _mm_srli_epi16(sum, 1); + const __m128i A0 = _mm_packus_epi16(avg3, avg3); + const uint32_t output = _mm_cvtsi128_si32(A0); + return output; +} + +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; +} + +//------------------------------------------------------------------------------ +// Subtract-Green Transform + +static void AddGreenToBlueAndRed(uint32_t* argb_data, int num_pixels) { + int i; + for (i = 0; i + 4 <= num_pixels; i += 4) { + const __m128i in = _mm_loadu_si128((__m128i*)&argb_data[i]); // argb + const __m128i A = _mm_srli_epi16(in, 8); // 0 a 0 g + const __m128i B = _mm_shufflelo_epi16(A, _MM_SHUFFLE(2, 2, 0, 0)); + const __m128i C = _mm_shufflehi_epi16(B, _MM_SHUFFLE(2, 2, 0, 0)); // 0g0g + const __m128i out = _mm_add_epi8(in, C); + _mm_storeu_si128((__m128i*)&argb_data[i], out); + } + // fallthrough and finish off with plain-C + VP8LAddGreenToBlueAndRed_C(argb_data + i, num_pixels - i); +} + +//------------------------------------------------------------------------------ +// Color Transform + +static void TransformColorInverse(const VP8LMultipliers* const m, + uint32_t* argb_data, int num_pixels) { + // sign-extended multiplying constants, pre-shifted by 5. +#define CST(X) (((int16_t)(m->X << 8)) >> 5) // sign-extend + const __m128i mults_rb = _mm_set_epi16( + CST(green_to_red_), CST(green_to_blue_), + CST(green_to_red_), CST(green_to_blue_), + CST(green_to_red_), CST(green_to_blue_), + CST(green_to_red_), CST(green_to_blue_)); + const __m128i mults_b2 = _mm_set_epi16( + CST(red_to_blue_), 0, CST(red_to_blue_), 0, + CST(red_to_blue_), 0, CST(red_to_blue_), 0); +#undef CST + const __m128i mask_ag = _mm_set1_epi32(0xff00ff00); // alpha-green masks + int i; + for (i = 0; i + 4 <= num_pixels; i += 4) { + const __m128i in = _mm_loadu_si128((__m128i*)&argb_data[i]); // argb + const __m128i A = _mm_and_si128(in, mask_ag); // a 0 g 0 + const __m128i B = _mm_shufflelo_epi16(A, _MM_SHUFFLE(2, 2, 0, 0)); + const __m128i C = _mm_shufflehi_epi16(B, _MM_SHUFFLE(2, 2, 0, 0)); // g0g0 + const __m128i D = _mm_mulhi_epi16(C, mults_rb); // x dr x db1 + const __m128i E = _mm_add_epi8(in, D); // x r' x b' + const __m128i F = _mm_slli_epi16(E, 8); // r' 0 b' 0 + const __m128i G = _mm_mulhi_epi16(F, mults_b2); // x db2 0 0 + const __m128i H = _mm_srli_epi32(G, 8); // 0 x db2 0 + const __m128i I = _mm_add_epi8(H, F); // r' x b'' 0 + const __m128i J = _mm_srli_epi16(I, 8); // 0 r' 0 b'' + const __m128i out = _mm_or_si128(J, A); + _mm_storeu_si128((__m128i*)&argb_data[i], out); + } + // Fall-back to C-version for left-overs. + VP8LTransformColorInverse_C(m, argb_data + i, num_pixels - i); +} + +//------------------------------------------------------------------------------ +// Color-space conversion functions + +static void ConvertBGRAToRGBA(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const __m128i* in = (const __m128i*)src; + __m128i* out = (__m128i*)dst; + while (num_pixels >= 8) { + const __m128i bgra0 = _mm_loadu_si128(in++); // bgra0|bgra1|bgra2|bgra3 + const __m128i bgra4 = _mm_loadu_si128(in++); // bgra4|bgra5|bgra6|bgra7 + const __m128i v0l = _mm_unpacklo_epi8(bgra0, bgra4); // b0b4g0g4r0r4a0a4... + const __m128i v0h = _mm_unpackhi_epi8(bgra0, bgra4); // b2b6g2g6r2r6a2a6... + const __m128i v1l = _mm_unpacklo_epi8(v0l, v0h); // b0b2b4b6g0g2g4g6... + const __m128i v1h = _mm_unpackhi_epi8(v0l, v0h); // b1b3b5b7g1g3g5g7... + const __m128i v2l = _mm_unpacklo_epi8(v1l, v1h); // b0...b7 | g0...g7 + const __m128i v2h = _mm_unpackhi_epi8(v1l, v1h); // r0...r7 | a0...a7 + const __m128i ga0 = _mm_unpackhi_epi64(v2l, v2h); // g0...g7 | a0...a7 + const __m128i rb0 = _mm_unpacklo_epi64(v2h, v2l); // r0...r7 | b0...b7 + const __m128i rg0 = _mm_unpacklo_epi8(rb0, ga0); // r0g0r1g1 ... r6g6r7g7 + const __m128i ba0 = _mm_unpackhi_epi8(rb0, ga0); // b0a0b1a1 ... b6a6b7a7 + const __m128i rgba0 = _mm_unpacklo_epi16(rg0, ba0); // rgba0|rgba1... + const __m128i rgba4 = _mm_unpackhi_epi16(rg0, ba0); // rgba4|rgba5... + _mm_storeu_si128(out++, rgba0); + _mm_storeu_si128(out++, rgba4); + num_pixels -= 8; + } + // left-overs + VP8LConvertBGRAToRGBA_C((const uint32_t*)in, num_pixels, (uint8_t*)out); +} + +static void ConvertBGRAToRGBA4444(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const __m128i mask_0x0f = _mm_set1_epi8(0x0f); + const __m128i mask_0xf0 = _mm_set1_epi8(0xf0); + const __m128i* in = (const __m128i*)src; + __m128i* out = (__m128i*)dst; + while (num_pixels >= 8) { + const __m128i bgra0 = _mm_loadu_si128(in++); // bgra0|bgra1|bgra2|bgra3 + const __m128i bgra4 = _mm_loadu_si128(in++); // bgra4|bgra5|bgra6|bgra7 + const __m128i v0l = _mm_unpacklo_epi8(bgra0, bgra4); // b0b4g0g4r0r4a0a4... + const __m128i v0h = _mm_unpackhi_epi8(bgra0, bgra4); // b2b6g2g6r2r6a2a6... + const __m128i v1l = _mm_unpacklo_epi8(v0l, v0h); // b0b2b4b6g0g2g4g6... + const __m128i v1h = _mm_unpackhi_epi8(v0l, v0h); // b1b3b5b7g1g3g5g7... + const __m128i v2l = _mm_unpacklo_epi8(v1l, v1h); // b0...b7 | g0...g7 + const __m128i v2h = _mm_unpackhi_epi8(v1l, v1h); // r0...r7 | a0...a7 + const __m128i ga0 = _mm_unpackhi_epi64(v2l, v2h); // g0...g7 | a0...a7 + const __m128i rb0 = _mm_unpacklo_epi64(v2h, v2l); // r0...r7 | b0...b7 + const __m128i ga1 = _mm_srli_epi16(ga0, 4); // g0-|g1-|...|a6-|a7- + const __m128i rb1 = _mm_and_si128(rb0, mask_0xf0); // -r0|-r1|...|-b6|-a7 + const __m128i ga2 = _mm_and_si128(ga1, mask_0x0f); // g0-|g1-|...|a6-|a7- + const __m128i rgba0 = _mm_or_si128(ga2, rb1); // rg0..rg7 | ba0..ba7 + const __m128i rgba1 = _mm_srli_si128(rgba0, 8); // ba0..ba7 | 0 +#ifdef WEBP_SWAP_16BIT_CSP + const __m128i rgba = _mm_unpacklo_epi8(rgba1, rgba0); // barg0...barg7 +#else + const __m128i rgba = _mm_unpacklo_epi8(rgba0, rgba1); // rgba0...rgba7 +#endif + _mm_storeu_si128(out++, rgba); + num_pixels -= 8; + } + // left-overs + VP8LConvertBGRAToRGBA4444_C((const uint32_t*)in, num_pixels, (uint8_t*)out); +} + +static void ConvertBGRAToRGB565(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const __m128i mask_0xe0 = _mm_set1_epi8(0xe0); + const __m128i mask_0xf8 = _mm_set1_epi8(0xf8); + const __m128i mask_0x07 = _mm_set1_epi8(0x07); + const __m128i* in = (const __m128i*)src; + __m128i* out = (__m128i*)dst; + while (num_pixels >= 8) { + const __m128i bgra0 = _mm_loadu_si128(in++); // bgra0|bgra1|bgra2|bgra3 + const __m128i bgra4 = _mm_loadu_si128(in++); // bgra4|bgra5|bgra6|bgra7 + const __m128i v0l = _mm_unpacklo_epi8(bgra0, bgra4); // b0b4g0g4r0r4a0a4... + const __m128i v0h = _mm_unpackhi_epi8(bgra0, bgra4); // b2b6g2g6r2r6a2a6... + const __m128i v1l = _mm_unpacklo_epi8(v0l, v0h); // b0b2b4b6g0g2g4g6... + const __m128i v1h = _mm_unpackhi_epi8(v0l, v0h); // b1b3b5b7g1g3g5g7... + const __m128i v2l = _mm_unpacklo_epi8(v1l, v1h); // b0...b7 | g0...g7 + const __m128i v2h = _mm_unpackhi_epi8(v1l, v1h); // r0...r7 | a0...a7 + const __m128i ga0 = _mm_unpackhi_epi64(v2l, v2h); // g0...g7 | a0...a7 + const __m128i rb0 = _mm_unpacklo_epi64(v2h, v2l); // r0...r7 | b0...b7 + const __m128i rb1 = _mm_and_si128(rb0, mask_0xf8); // -r0..-r7|-b0..-b7 + const __m128i g_lo1 = _mm_srli_epi16(ga0, 5); + const __m128i g_lo2 = _mm_and_si128(g_lo1, mask_0x07); // g0-...g7-|xx (3b) + const __m128i g_hi1 = _mm_slli_epi16(ga0, 3); + const __m128i g_hi2 = _mm_and_si128(g_hi1, mask_0xe0); // -g0...-g7|xx (3b) + const __m128i b0 = _mm_srli_si128(rb1, 8); // -b0...-b7|0 + const __m128i rg1 = _mm_or_si128(rb1, g_lo2); // gr0...gr7|xx + const __m128i b1 = _mm_srli_epi16(b0, 3); + const __m128i gb1 = _mm_or_si128(b1, g_hi2); // bg0...bg7|xx +#ifdef WEBP_SWAP_16BIT_CSP + const __m128i rgba = _mm_unpacklo_epi8(gb1, rg1); // rggb0...rggb7 +#else + const __m128i rgba = _mm_unpacklo_epi8(rg1, gb1); // bgrb0...bgrb7 +#endif + _mm_storeu_si128(out++, rgba); + num_pixels -= 8; + } + // left-overs + VP8LConvertBGRAToRGB565_C((const uint32_t*)in, num_pixels, (uint8_t*)out); +} + +static void ConvertBGRAToBGR(const uint32_t* src, + int num_pixels, uint8_t* dst) { + const __m128i mask_l = _mm_set_epi32(0, 0x00ffffff, 0, 0x00ffffff); + const __m128i mask_h = _mm_set_epi32(0x00ffffff, 0, 0x00ffffff, 0); + const __m128i* in = (const __m128i*)src; + const uint8_t* const end = dst + num_pixels * 3; + // the last storel_epi64 below writes 8 bytes starting at offset 18 + while (dst + 26 <= end) { + const __m128i bgra0 = _mm_loadu_si128(in++); // bgra0|bgra1|bgra2|bgra3 + const __m128i bgra4 = _mm_loadu_si128(in++); // bgra4|bgra5|bgra6|bgra7 + const __m128i a0l = _mm_and_si128(bgra0, mask_l); // bgr0|0|bgr0|0 + const __m128i a4l = _mm_and_si128(bgra4, mask_l); // bgr0|0|bgr0|0 + const __m128i a0h = _mm_and_si128(bgra0, mask_h); // 0|bgr0|0|bgr0 + const __m128i a4h = _mm_and_si128(bgra4, mask_h); // 0|bgr0|0|bgr0 + const __m128i b0h = _mm_srli_epi64(a0h, 8); // 000b|gr00|000b|gr00 + const __m128i b4h = _mm_srli_epi64(a4h, 8); // 000b|gr00|000b|gr00 + const __m128i c0 = _mm_or_si128(a0l, b0h); // rgbrgb00|rgbrgb00 + const __m128i c4 = _mm_or_si128(a4l, b4h); // rgbrgb00|rgbrgb00 + const __m128i c2 = _mm_srli_si128(c0, 8); + const __m128i c6 = _mm_srli_si128(c4, 8); + _mm_storel_epi64((__m128i*)(dst + 0), c0); + _mm_storel_epi64((__m128i*)(dst + 6), c2); + _mm_storel_epi64((__m128i*)(dst + 12), c4); + _mm_storel_epi64((__m128i*)(dst + 18), c6); + dst += 24; + num_pixels -= 8; + } + // left-overs + VP8LConvertBGRAToBGR_C((const uint32_t*)in, num_pixels, dst); +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8LDspInitSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitSSE2(void) { + 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; + + VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed; + VP8LTransformColorInverse = TransformColorInverse; + + VP8LConvertBGRAToRGBA = ConvertBGRAToRGBA; + VP8LConvertBGRAToRGBA4444 = ConvertBGRAToRGBA4444; + VP8LConvertBGRAToRGB565 = ConvertBGRAToRGB565; + VP8LConvertBGRAToBGR = ConvertBGRAToBGR; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(VP8LDspInitSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/thirdparty/libwebp/dsp/mips_macro.h b/thirdparty/libwebp/dsp/mips_macro.h new file mode 100644 index 0000000000..44aba9b71d --- /dev/null +++ b/thirdparty/libwebp/dsp/mips_macro.h @@ -0,0 +1,200 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS common macros + +#ifndef WEBP_DSP_MIPS_MACRO_H_ +#define WEBP_DSP_MIPS_MACRO_H_ + +#if defined(__GNUC__) && defined(__ANDROID__) && LOCAL_GCC_VERSION == 0x409 +#define WORK_AROUND_GCC +#endif + +#define STR(s) #s +#define XSTR(s) STR(s) + +// O0[31..16 | 15..0] = I0[31..16 | 15..0] + I1[31..16 | 15..0] +// O1[31..16 | 15..0] = I0[31..16 | 15..0] - I1[31..16 | 15..0] +// O - output +// I - input (macro doesn't change it) +#define ADD_SUB_HALVES(O0, O1, \ + I0, I1) \ + "addq.ph %[" #O0 "], %[" #I0 "], %[" #I1 "] \n\t" \ + "subq.ph %[" #O1 "], %[" #I0 "], %[" #I1 "] \n\t" + +// O - output +// I - input (macro doesn't change it) +// I[0/1] - offset in bytes +#define LOAD_IN_X2(O0, O1, \ + I0, I1) \ + "lh %[" #O0 "], " #I0 "(%[in]) \n\t" \ + "lh %[" #O1 "], " #I1 "(%[in]) \n\t" + +// I0 - location +// I1..I9 - offsets in bytes +#define LOAD_WITH_OFFSET_X4(O0, O1, O2, O3, \ + I0, I1, I2, I3, I4, I5, I6, I7, I8, I9) \ + "ulw %[" #O0 "], " #I1 "+" XSTR(I9) "*" #I5 "(%[" #I0 "]) \n\t" \ + "ulw %[" #O1 "], " #I2 "+" XSTR(I9) "*" #I6 "(%[" #I0 "]) \n\t" \ + "ulw %[" #O2 "], " #I3 "+" XSTR(I9) "*" #I7 "(%[" #I0 "]) \n\t" \ + "ulw %[" #O3 "], " #I4 "+" XSTR(I9) "*" #I8 "(%[" #I0 "]) \n\t" + +// O - output +// IO - input/output +// I - input (macro doesn't change it) +#define MUL_SHIFT_SUM(O0, O1, O2, O3, O4, O5, O6, O7, \ + IO0, IO1, IO2, IO3, \ + I0, I1, I2, I3, I4, I5, I6, I7) \ + "mul %[" #O0 "], %[" #I0 "], %[kC2] \n\t" \ + "mul %[" #O1 "], %[" #I0 "], %[kC1] \n\t" \ + "mul %[" #O2 "], %[" #I1 "], %[kC2] \n\t" \ + "mul %[" #O3 "], %[" #I1 "], %[kC1] \n\t" \ + "mul %[" #O4 "], %[" #I2 "], %[kC2] \n\t" \ + "mul %[" #O5 "], %[" #I2 "], %[kC1] \n\t" \ + "mul %[" #O6 "], %[" #I3 "], %[kC2] \n\t" \ + "mul %[" #O7 "], %[" #I3 "], %[kC1] \n\t" \ + "sra %[" #O0 "], %[" #O0 "], 16 \n\t" \ + "sra %[" #O1 "], %[" #O1 "], 16 \n\t" \ + "sra %[" #O2 "], %[" #O2 "], 16 \n\t" \ + "sra %[" #O3 "], %[" #O3 "], 16 \n\t" \ + "sra %[" #O4 "], %[" #O4 "], 16 \n\t" \ + "sra %[" #O5 "], %[" #O5 "], 16 \n\t" \ + "sra %[" #O6 "], %[" #O6 "], 16 \n\t" \ + "sra %[" #O7 "], %[" #O7 "], 16 \n\t" \ + "addu %[" #IO0 "], %[" #IO0 "], %[" #I4 "] \n\t" \ + "addu %[" #IO1 "], %[" #IO1 "], %[" #I5 "] \n\t" \ + "subu %[" #IO2 "], %[" #IO2 "], %[" #I6 "] \n\t" \ + "subu %[" #IO3 "], %[" #IO3 "], %[" #I7 "] \n\t" + +// O - output +// I - input (macro doesn't change it) +#define INSERT_HALF_X2(O0, O1, \ + I0, I1) \ + "ins %[" #O0 "], %[" #I0 "], 16, 16 \n\t" \ + "ins %[" #O1 "], %[" #I1 "], 16, 16 \n\t" + +// O - output +// I - input (macro doesn't change it) +#define SRA_16(O0, O1, O2, O3, \ + I0, I1, I2, I3) \ + "sra %[" #O0 "], %[" #I0 "], 16 \n\t" \ + "sra %[" #O1 "], %[" #I1 "], 16 \n\t" \ + "sra %[" #O2 "], %[" #I2 "], 16 \n\t" \ + "sra %[" #O3 "], %[" #I3 "], 16 \n\t" + +// temp0[31..16 | 15..0] = temp8[31..16 | 15..0] + temp12[31..16 | 15..0] +// temp1[31..16 | 15..0] = temp8[31..16 | 15..0] - temp12[31..16 | 15..0] +// temp0[31..16 | 15..0] = temp0[31..16 >> 3 | 15..0 >> 3] +// temp1[31..16 | 15..0] = temp1[31..16 >> 3 | 15..0 >> 3] +// O - output +// I - input (macro doesn't change it) +#define SHIFT_R_SUM_X2(O0, O1, O2, O3, O4, O5, O6, O7, \ + I0, I1, I2, I3, I4, I5, I6, I7) \ + "addq.ph %[" #O0 "], %[" #I0 "], %[" #I4 "] \n\t" \ + "subq.ph %[" #O1 "], %[" #I0 "], %[" #I4 "] \n\t" \ + "addq.ph %[" #O2 "], %[" #I1 "], %[" #I5 "] \n\t" \ + "subq.ph %[" #O3 "], %[" #I1 "], %[" #I5 "] \n\t" \ + "addq.ph %[" #O4 "], %[" #I2 "], %[" #I6 "] \n\t" \ + "subq.ph %[" #O5 "], %[" #I2 "], %[" #I6 "] \n\t" \ + "addq.ph %[" #O6 "], %[" #I3 "], %[" #I7 "] \n\t" \ + "subq.ph %[" #O7 "], %[" #I3 "], %[" #I7 "] \n\t" \ + "shra.ph %[" #O0 "], %[" #O0 "], 3 \n\t" \ + "shra.ph %[" #O1 "], %[" #O1 "], 3 \n\t" \ + "shra.ph %[" #O2 "], %[" #O2 "], 3 \n\t" \ + "shra.ph %[" #O3 "], %[" #O3 "], 3 \n\t" \ + "shra.ph %[" #O4 "], %[" #O4 "], 3 \n\t" \ + "shra.ph %[" #O5 "], %[" #O5 "], 3 \n\t" \ + "shra.ph %[" #O6 "], %[" #O6 "], 3 \n\t" \ + "shra.ph %[" #O7 "], %[" #O7 "], 3 \n\t" + +// precrq.ph.w temp0, temp8, temp2 +// temp0 = temp8[31..16] | temp2[31..16] +// ins temp2, temp8, 16, 16 +// temp2 = temp8[31..16] | temp2[15..0] +// O - output +// IO - input/output +// I - input (macro doesn't change it) +#define PACK_2_HALVES_TO_WORD(O0, O1, O2, O3, \ + IO0, IO1, IO2, IO3, \ + I0, I1, I2, I3) \ + "precrq.ph.w %[" #O0 "], %[" #I0 "], %[" #IO0 "] \n\t" \ + "precrq.ph.w %[" #O1 "], %[" #I1 "], %[" #IO1 "] \n\t" \ + "ins %[" #IO0 "], %[" #I0 "], 16, 16 \n\t" \ + "ins %[" #IO1 "], %[" #I1 "], 16, 16 \n\t" \ + "precrq.ph.w %[" #O2 "], %[" #I2 "], %[" #IO2 "] \n\t" \ + "precrq.ph.w %[" #O3 "], %[" #I3 "], %[" #IO3 "] \n\t" \ + "ins %[" #IO2 "], %[" #I2 "], 16, 16 \n\t" \ + "ins %[" #IO3 "], %[" #I3 "], 16, 16 \n\t" + +// preceu.ph.qbr temp0, temp8 +// temp0 = 0 | 0 | temp8[23..16] | temp8[7..0] +// preceu.ph.qbl temp1, temp8 +// temp1 = temp8[23..16] | temp8[7..0] | 0 | 0 +// O - output +// I - input (macro doesn't change it) +#define CONVERT_2_BYTES_TO_HALF(O0, O1, O2, O3, O4, O5, O6, O7, \ + I0, I1, I2, I3) \ + "preceu.ph.qbr %[" #O0 "], %[" #I0 "] \n\t" \ + "preceu.ph.qbl %[" #O1 "], %[" #I0 "] \n\t" \ + "preceu.ph.qbr %[" #O2 "], %[" #I1 "] \n\t" \ + "preceu.ph.qbl %[" #O3 "], %[" #I1 "] \n\t" \ + "preceu.ph.qbr %[" #O4 "], %[" #I2 "] \n\t" \ + "preceu.ph.qbl %[" #O5 "], %[" #I2 "] \n\t" \ + "preceu.ph.qbr %[" #O6 "], %[" #I3 "] \n\t" \ + "preceu.ph.qbl %[" #O7 "], %[" #I3 "] \n\t" + +// temp0[31..16 | 15..0] = temp0[31..16 | 15..0] + temp8[31..16 | 15..0] +// temp0[31..16 | 15..0] = temp0[31..16 <<(s) 7 | 15..0 <<(s) 7] +// temp1..temp7 same as temp0 +// precrqu_s.qb.ph temp0, temp1, temp0: +// temp0 = temp1[31..24] | temp1[15..8] | temp0[31..24] | temp0[15..8] +// store temp0 to dst +// IO - input/output +// I - input (macro doesn't change it) +#define STORE_SAT_SUM_X2(IO0, IO1, IO2, IO3, IO4, IO5, IO6, IO7, \ + I0, I1, I2, I3, I4, I5, I6, I7, \ + I8, I9, I10, I11, I12, I13) \ + "addq.ph %[" #IO0 "], %[" #IO0 "], %[" #I0 "] \n\t" \ + "addq.ph %[" #IO1 "], %[" #IO1 "], %[" #I1 "] \n\t" \ + "addq.ph %[" #IO2 "], %[" #IO2 "], %[" #I2 "] \n\t" \ + "addq.ph %[" #IO3 "], %[" #IO3 "], %[" #I3 "] \n\t" \ + "addq.ph %[" #IO4 "], %[" #IO4 "], %[" #I4 "] \n\t" \ + "addq.ph %[" #IO5 "], %[" #IO5 "], %[" #I5 "] \n\t" \ + "addq.ph %[" #IO6 "], %[" #IO6 "], %[" #I6 "] \n\t" \ + "addq.ph %[" #IO7 "], %[" #IO7 "], %[" #I7 "] \n\t" \ + "shll_s.ph %[" #IO0 "], %[" #IO0 "], 7 \n\t" \ + "shll_s.ph %[" #IO1 "], %[" #IO1 "], 7 \n\t" \ + "shll_s.ph %[" #IO2 "], %[" #IO2 "], 7 \n\t" \ + "shll_s.ph %[" #IO3 "], %[" #IO3 "], 7 \n\t" \ + "shll_s.ph %[" #IO4 "], %[" #IO4 "], 7 \n\t" \ + "shll_s.ph %[" #IO5 "], %[" #IO5 "], 7 \n\t" \ + "shll_s.ph %[" #IO6 "], %[" #IO6 "], 7 \n\t" \ + "shll_s.ph %[" #IO7 "], %[" #IO7 "], 7 \n\t" \ + "precrqu_s.qb.ph %[" #IO0 "], %[" #IO1 "], %[" #IO0 "] \n\t" \ + "precrqu_s.qb.ph %[" #IO2 "], %[" #IO3 "], %[" #IO2 "] \n\t" \ + "precrqu_s.qb.ph %[" #IO4 "], %[" #IO5 "], %[" #IO4 "] \n\t" \ + "precrqu_s.qb.ph %[" #IO6 "], %[" #IO7 "], %[" #IO6 "] \n\t" \ + "usw %[" #IO0 "], " XSTR(I13) "*" #I9 "(%[" #I8 "]) \n\t" \ + "usw %[" #IO2 "], " XSTR(I13) "*" #I10 "(%[" #I8 "]) \n\t" \ + "usw %[" #IO4 "], " XSTR(I13) "*" #I11 "(%[" #I8 "]) \n\t" \ + "usw %[" #IO6 "], " XSTR(I13) "*" #I12 "(%[" #I8 "]) \n\t" + +#define OUTPUT_EARLY_CLOBBER_REGS_10() \ + : [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), \ + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6), \ + [temp7]"=&r"(temp7), [temp8]"=&r"(temp8), [temp9]"=&r"(temp9), \ + [temp10]"=&r"(temp10) + +#define OUTPUT_EARLY_CLOBBER_REGS_18() \ + OUTPUT_EARLY_CLOBBER_REGS_10(), \ + [temp11]"=&r"(temp11), [temp12]"=&r"(temp12), [temp13]"=&r"(temp13), \ + [temp14]"=&r"(temp14), [temp15]"=&r"(temp15), [temp16]"=&r"(temp16), \ + [temp17]"=&r"(temp17), [temp18]"=&r"(temp18) + +#endif // WEBP_DSP_MIPS_MACRO_H_ diff --git a/thirdparty/libwebp/dsp/msa_macro.h b/thirdparty/libwebp/dsp/msa_macro.h new file mode 100644 index 0000000000..5c707f476a --- /dev/null +++ b/thirdparty/libwebp/dsp/msa_macro.h @@ -0,0 +1,555 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MSA common macros +// +// Author(s): Prashant Patil (prashant.patil@imgtec.com) + +#ifndef WEBP_DSP_MSA_MACRO_H_ +#define WEBP_DSP_MSA_MACRO_H_ + +#include <stdint.h> +#include <msa.h> + +#if defined(__clang__) + #define CLANG_BUILD +#endif + +#ifdef CLANG_BUILD + #define ADDVI_H(a, b) __msa_addvi_h((v8i16)a, b) + #define SRAI_H(a, b) __msa_srai_h((v8i16)a, b) + #define SRAI_W(a, b) __msa_srai_w((v4i32)a, b) +#else + #define ADDVI_H(a, b) (a + b) + #define SRAI_H(a, b) (a >> b) + #define SRAI_W(a, b) (a >> b) +#endif + +#define LD_B(RTYPE, psrc) *((RTYPE*)(psrc)) +#define LD_UB(...) LD_B(v16u8, __VA_ARGS__) +#define LD_SB(...) LD_B(v16i8, __VA_ARGS__) + +#define LD_H(RTYPE, psrc) *((RTYPE*)(psrc)) +#define LD_UH(...) LD_H(v8u16, __VA_ARGS__) +#define LD_SH(...) LD_H(v8i16, __VA_ARGS__) + +#define LD_W(RTYPE, psrc) *((RTYPE*)(psrc)) +#define LD_UW(...) LD_W(v4u32, __VA_ARGS__) +#define LD_SW(...) LD_W(v4i32, __VA_ARGS__) + +#define ST_B(RTYPE, in, pdst) *((RTYPE*)(pdst)) = in +#define ST_UB(...) ST_B(v16u8, __VA_ARGS__) +#define ST_SB(...) ST_B(v16i8, __VA_ARGS__) + +#define ST_H(RTYPE, in, pdst) *((RTYPE*)(pdst)) = in +#define ST_UH(...) ST_H(v8u16, __VA_ARGS__) +#define ST_SH(...) ST_H(v8i16, __VA_ARGS__) + +#define ST_W(RTYPE, in, pdst) *((RTYPE*)(pdst)) = in +#define ST_UW(...) ST_W(v4u32, __VA_ARGS__) +#define ST_SW(...) ST_W(v4i32, __VA_ARGS__) + +#define MSA_LOAD_FUNC(TYPE, INSTR, FUNC_NAME) \ + static inline TYPE FUNC_NAME(const void* const psrc) { \ + const uint8_t* const psrc_m = (const uint8_t*)psrc; \ + TYPE val_m; \ + asm volatile ( \ + "" #INSTR " %[val_m], %[psrc_m] \n\t" \ + : [val_m] "=r" (val_m) \ + : [psrc_m] "m" (*psrc_m)); \ + return val_m; \ + } + +#define MSA_LOAD(psrc, FUNC_NAME) FUNC_NAME(psrc) + +#define MSA_STORE_FUNC(TYPE, INSTR, FUNC_NAME) \ + static inline void FUNC_NAME(TYPE val, void* const pdst) { \ + uint8_t* const pdst_m = (uint8_t*)pdst; \ + TYPE val_m = val; \ + asm volatile ( \ + " " #INSTR " %[val_m], %[pdst_m] \n\t" \ + : [pdst_m] "=m" (*pdst_m) \ + : [val_m] "r" (val_m)); \ + } + +#define MSA_STORE(val, pdst, FUNC_NAME) FUNC_NAME(val, pdst) + +#if (__mips_isa_rev >= 6) + MSA_LOAD_FUNC(uint16_t, lh, msa_lh); + #define LH(psrc) MSA_LOAD(psrc, msa_lh) + MSA_LOAD_FUNC(uint32_t, lw, msa_lw); + #define LW(psrc) MSA_LOAD(psrc, msa_lw) + #if (__mips == 64) + MSA_LOAD_FUNC(uint64_t, ld, msa_ld); + #define LD(psrc) MSA_LOAD(psrc, msa_ld) + #else // !(__mips == 64) + #define LD(psrc) ((((uint64_t)MSA_LOAD(psrc + 4, msa_lw)) << 32) | \ + MSA_LOAD(psrc, msa_lw)) + #endif // (__mips == 64) + + MSA_STORE_FUNC(uint16_t, sh, msa_sh); + #define SH(val, pdst) MSA_STORE(val, pdst, msa_sh) + MSA_STORE_FUNC(uint32_t, sw, msa_sw); + #define SW(val, pdst) MSA_STORE(val, pdst, msa_sw) + MSA_STORE_FUNC(uint64_t, sd, msa_sd); + #define SD(val, pdst) MSA_STORE(val, pdst, msa_sd) +#else // !(__mips_isa_rev >= 6) + MSA_LOAD_FUNC(uint16_t, ulh, msa_ulh); + #define LH(psrc) MSA_LOAD(psrc, msa_ulh) + MSA_LOAD_FUNC(uint32_t, ulw, msa_ulw); + #define LW(psrc) MSA_LOAD(psrc, msa_ulw) + #if (__mips == 64) + MSA_LOAD_FUNC(uint64_t, uld, msa_uld); + #define LD(psrc) MSA_LOAD(psrc, msa_uld) + #else // !(__mips == 64) + #define LD(psrc) ((((uint64_t)MSA_LOAD(psrc + 4, msa_ulw)) << 32) | \ + MSA_LOAD(psrc, msa_ulw)) + #endif // (__mips == 64) + + MSA_STORE_FUNC(uint16_t, ush, msa_ush); + #define SH(val, pdst) MSA_STORE(val, pdst, msa_ush) + MSA_STORE_FUNC(uint32_t, usw, msa_usw); + #define SW(val, pdst) MSA_STORE(val, pdst, msa_usw) + #define SD(val, pdst) { \ + uint8_t* const pdst_sd_m = (uint8_t*)(pdst); \ + const uint32_t val0_m = (uint32_t)(val & 0x00000000FFFFFFFF); \ + const uint32_t val1_m = (uint32_t)((val >> 32) & 0x00000000FFFFFFFF); \ + SW(val0_m, pdst_sd_m); \ + SW(val1_m, pdst_sd_m + 4); \ + } +#endif // (__mips_isa_rev >= 6) + +/* Description : Load 4 words with stride + * Arguments : Inputs - psrc, stride + * Outputs - out0, out1, out2, out3 + * Details : Load word in 'out0' from (psrc) + * Load word in 'out1' from (psrc + stride) + * Load word in 'out2' from (psrc + 2 * stride) + * Load word in 'out3' from (psrc + 3 * stride) + */ +#define LW4(psrc, stride, out0, out1, out2, out3) { \ + const uint8_t* ptmp = (const uint8_t*)psrc; \ + out0 = LW(ptmp); \ + ptmp += stride; \ + out1 = LW(ptmp); \ + ptmp += stride; \ + out2 = LW(ptmp); \ + ptmp += stride; \ + out3 = LW(ptmp); \ +} + +/* Description : Store 4 words with stride + * Arguments : Inputs - in0, in1, in2, in3, pdst, stride + * Details : Store word from 'in0' to (pdst) + * Store word from 'in1' to (pdst + stride) + * Store word from 'in2' to (pdst + 2 * stride) + * Store word from 'in3' to (pdst + 3 * stride) + */ +#define SW4(in0, in1, in2, in3, pdst, stride) { \ + uint8_t* ptmp = (uint8_t*)pdst; \ + SW(in0, ptmp); \ + ptmp += stride; \ + SW(in1, ptmp); \ + ptmp += stride; \ + SW(in2, ptmp); \ + ptmp += stride; \ + SW(in3, ptmp); \ +} + +/* Description : Load vectors with 16 byte elements with stride + * Arguments : Inputs - psrc, stride + * Outputs - out0, out1 + * Return Type - as per RTYPE + * Details : Load 16 byte elements in 'out0' from (psrc) + * Load 16 byte elements in 'out1' from (psrc + stride) + */ +#define LD_B2(RTYPE, psrc, stride, out0, out1) { \ + out0 = LD_B(RTYPE, psrc); \ + out1 = LD_B(RTYPE, psrc + stride); \ +} +#define LD_UB2(...) LD_B2(v16u8, __VA_ARGS__) +#define LD_SB2(...) LD_B2(v16i8, __VA_ARGS__) + +#define LD_B4(RTYPE, psrc, stride, out0, out1, out2, out3) { \ + LD_B2(RTYPE, psrc, stride, out0, out1); \ + LD_B2(RTYPE, psrc + 2 * stride , stride, out2, out3); \ +} +#define LD_UB4(...) LD_B4(v16u8, __VA_ARGS__) +#define LD_SB4(...) LD_B4(v16i8, __VA_ARGS__) + +/* Description : Load vectors with 8 halfword elements with stride + * Arguments : Inputs - psrc, stride + * Outputs - out0, out1 + * Details : Load 8 halfword elements in 'out0' from (psrc) + * Load 8 halfword elements in 'out1' from (psrc + stride) + */ +#define LD_H2(RTYPE, psrc, stride, out0, out1) { \ + out0 = LD_H(RTYPE, psrc); \ + out1 = LD_H(RTYPE, psrc + stride); \ +} +#define LD_UH2(...) LD_H2(v8u16, __VA_ARGS__) +#define LD_SH2(...) LD_H2(v8i16, __VA_ARGS__) + +/* Description : Store 4x4 byte block to destination memory from input vector + * Arguments : Inputs - in0, in1, pdst, stride + * Details : 'Idx0' word element from input vector 'in0' is copied to the + * GP register and stored to (pdst) + * 'Idx1' word element from input vector 'in0' is copied to the + * GP register and stored to (pdst + stride) + * 'Idx2' word element from input vector 'in0' is copied to the + * GP register and stored to (pdst + 2 * stride) + * 'Idx3' word element from input vector 'in0' is copied to the + * GP register and stored to (pdst + 3 * stride) + */ +#define ST4x4_UB(in0, in1, idx0, idx1, idx2, idx3, pdst, stride) { \ + uint8_t* const pblk_4x4_m = (uint8_t*)pdst; \ + const uint32_t out0_m = __msa_copy_s_w((v4i32)in0, idx0); \ + const uint32_t out1_m = __msa_copy_s_w((v4i32)in0, idx1); \ + const uint32_t out2_m = __msa_copy_s_w((v4i32)in1, idx2); \ + const uint32_t out3_m = __msa_copy_s_w((v4i32)in1, idx3); \ + SW4(out0_m, out1_m, out2_m, out3_m, pblk_4x4_m, stride); \ +} + +/* Description : Immediate number of elements to slide + * Arguments : Inputs - in0, in1, slide_val + * Outputs - out + * Return Type - as per RTYPE + * Details : Byte elements from 'in1' vector are slid into 'in0' by + * value specified in the 'slide_val' + */ +#define SLDI_B(RTYPE, in0, in1, slide_val) \ + (RTYPE)__msa_sldi_b((v16i8)in0, (v16i8)in1, slide_val) \ + +#define SLDI_UB(...) SLDI_B(v16u8, __VA_ARGS__) +#define SLDI_SB(...) SLDI_B(v16i8, __VA_ARGS__) +#define SLDI_SH(...) SLDI_B(v8i16, __VA_ARGS__) + +/* Description : Shuffle halfword vector elements as per mask vector + * Arguments : Inputs - in0, in1, in2, in3, mask0, mask1 + * Outputs - out0, out1 + * Return Type - as per RTYPE + * Details : halfword elements from 'in0' & 'in1' are copied selectively to + * 'out0' as per control vector 'mask0' + */ +#define VSHF_H2(RTYPE, in0, in1, in2, in3, mask0, mask1, out0, out1) { \ + out0 = (RTYPE)__msa_vshf_h((v8i16)mask0, (v8i16)in1, (v8i16)in0); \ + out1 = (RTYPE)__msa_vshf_h((v8i16)mask1, (v8i16)in3, (v8i16)in2); \ +} +#define VSHF_H2_UH(...) VSHF_H2(v8u16, __VA_ARGS__) +#define VSHF_H2_SH(...) VSHF_H2(v8i16, __VA_ARGS__) + +/* Description : Clips all signed halfword elements of input vector + * between 0 & 255 + * Arguments : Input/output - val + * Return Type - signed halfword + */ +#define CLIP_SH_0_255(val) { \ + const v8i16 max_m = __msa_ldi_h(255); \ + val = __msa_maxi_s_h((v8i16)val, 0); \ + val = __msa_min_s_h(max_m, (v8i16)val); \ +} +#define CLIP_SH2_0_255(in0, in1) { \ + CLIP_SH_0_255(in0); \ + CLIP_SH_0_255(in1); \ +} + +/* Description : Clips all signed word elements of input vector + * between 0 & 255 + * Arguments : Input/output - val + * Return Type - signed word + */ +#define CLIP_SW_0_255(val) { \ + const v4i32 max_m = __msa_ldi_w(255); \ + val = __msa_maxi_s_w((v4i32)val, 0); \ + val = __msa_min_s_w(max_m, (v4i32)val); \ +} +#define CLIP_SW4_0_255(in0, in1, in2, in3) { \ + CLIP_SW_0_255(in0); \ + CLIP_SW_0_255(in1); \ + CLIP_SW_0_255(in2); \ + CLIP_SW_0_255(in3); \ +} + +/* Description : Set element n input vector to GPR value + * Arguments : Inputs - in0, in1, in2, in3 + * Output - out + * Return Type - as per RTYPE + * Details : Set element 0 in vector 'out' to value specified in 'in0' + */ +#define INSERT_W2(RTYPE, in0, in1, out) { \ + out = (RTYPE)__msa_insert_w((v4i32)out, 0, in0); \ + out = (RTYPE)__msa_insert_w((v4i32)out, 1, in1); \ +} +#define INSERT_W2_UB(...) INSERT_W2(v16u8, __VA_ARGS__) +#define INSERT_W2_SB(...) INSERT_W2(v16i8, __VA_ARGS__) + +#define INSERT_W4(RTYPE, in0, in1, in2, in3, out) { \ + out = (RTYPE)__msa_insert_w((v4i32)out, 0, in0); \ + out = (RTYPE)__msa_insert_w((v4i32)out, 1, in1); \ + out = (RTYPE)__msa_insert_w((v4i32)out, 2, in2); \ + out = (RTYPE)__msa_insert_w((v4i32)out, 3, in3); \ +} +#define INSERT_W4_UB(...) INSERT_W4(v16u8, __VA_ARGS__) +#define INSERT_W4_SB(...) INSERT_W4(v16i8, __VA_ARGS__) +#define INSERT_W4_SW(...) INSERT_W4(v4i32, __VA_ARGS__) + +/* Description : Interleave right half of byte elements from vectors + * Arguments : Inputs - in0, in1, in2, in3 + * Outputs - out0, out1 + * Return Type - as per RTYPE + * Details : Right half of byte elements of 'in0' and 'in1' are interleaved + * and written to out0. + */ +#define ILVR_B2(RTYPE, in0, in1, in2, in3, out0, out1) { \ + out0 = (RTYPE)__msa_ilvr_b((v16i8)in0, (v16i8)in1); \ + out1 = (RTYPE)__msa_ilvr_b((v16i8)in2, (v16i8)in3); \ +} +#define ILVR_B2_UB(...) ILVR_B2(v16u8, __VA_ARGS__) +#define ILVR_B2_SB(...) ILVR_B2(v16i8, __VA_ARGS__) +#define ILVR_B2_UH(...) ILVR_B2(v8u16, __VA_ARGS__) +#define ILVR_B2_SH(...) ILVR_B2(v8i16, __VA_ARGS__) +#define ILVR_B2_SW(...) ILVR_B2(v4i32, __VA_ARGS__) + +#define ILVR_B4(RTYPE, in0, in1, in2, in3, in4, in5, in6, in7, \ + out0, out1, out2, out3) { \ + ILVR_B2(RTYPE, in0, in1, in2, in3, out0, out1); \ + ILVR_B2(RTYPE, in4, in5, in6, in7, out2, out3); \ +} +#define ILVR_B4_UB(...) ILVR_B4(v16u8, __VA_ARGS__) +#define ILVR_B4_SB(...) ILVR_B4(v16i8, __VA_ARGS__) +#define ILVR_B4_UH(...) ILVR_B4(v8u16, __VA_ARGS__) +#define ILVR_B4_SH(...) ILVR_B4(v8i16, __VA_ARGS__) +#define ILVR_B4_SW(...) ILVR_B4(v4i32, __VA_ARGS__) + +/* Description : Interleave right half of halfword elements from vectors + * Arguments : Inputs - in0, in1, in2, in3 + * Outputs - out0, out1 + * Return Type - as per RTYPE + * Details : Right half of halfword elements of 'in0' and 'in1' are + * interleaved and written to 'out0'. + */ +#define ILVR_H2(RTYPE, in0, in1, in2, in3, out0, out1) { \ + out0 = (RTYPE)__msa_ilvr_h((v8i16)in0, (v8i16)in1); \ + out1 = (RTYPE)__msa_ilvr_h((v8i16)in2, (v8i16)in3); \ +} +#define ILVR_H2_UB(...) ILVR_H2(v16u8, __VA_ARGS__) +#define ILVR_H2_SH(...) ILVR_H2(v8i16, __VA_ARGS__) +#define ILVR_H2_SW(...) ILVR_H2(v4i32, __VA_ARGS__) + +#define ILVR_H4(RTYPE, in0, in1, in2, in3, in4, in5, in6, in7, \ + out0, out1, out2, out3) { \ + ILVR_H2(RTYPE, in0, in1, in2, in3, out0, out1); \ + ILVR_H2(RTYPE, in4, in5, in6, in7, out2, out3); \ +} +#define ILVR_H4_UB(...) ILVR_H4(v16u8, __VA_ARGS__) +#define ILVR_H4_SH(...) ILVR_H4(v8i16, __VA_ARGS__) +#define ILVR_H4_SW(...) ILVR_H4(v4i32, __VA_ARGS__) + +/* Description : Interleave right half of double word elements from vectors + * Arguments : Inputs - in0, in1, in2, in3 + * Outputs - out0, out1 + * Return Type - as per RTYPE + * Details : Right half of double word elements of 'in0' and 'in1' are + * interleaved and written to 'out0'. + */ +#define ILVR_D2(RTYPE, in0, in1, in2, in3, out0, out1) { \ + out0 = (RTYPE)__msa_ilvr_d((v2i64)in0, (v2i64)in1); \ + out1 = (RTYPE)__msa_ilvr_d((v2i64)in2, (v2i64)in3); \ +} +#define ILVR_D2_UB(...) ILVR_D2(v16u8, __VA_ARGS__) +#define ILVR_D2_SB(...) ILVR_D2(v16i8, __VA_ARGS__) +#define ILVR_D2_SH(...) ILVR_D2(v8i16, __VA_ARGS__) + +#define ILVRL_H2(RTYPE, in0, in1, out0, out1) { \ + out0 = (RTYPE)__msa_ilvr_h((v8i16)in0, (v8i16)in1); \ + out1 = (RTYPE)__msa_ilvl_h((v8i16)in0, (v8i16)in1); \ +} +#define ILVRL_H2_UB(...) ILVRL_H2(v16u8, __VA_ARGS__) +#define ILVRL_H2_SB(...) ILVRL_H2(v16i8, __VA_ARGS__) +#define ILVRL_H2_SH(...) ILVRL_H2(v8i16, __VA_ARGS__) +#define ILVRL_H2_SW(...) ILVRL_H2(v4i32, __VA_ARGS__) +#define ILVRL_H2_UW(...) ILVRL_H2(v4u32, __VA_ARGS__) + +#define ILVRL_W2(RTYPE, in0, in1, out0, out1) { \ + out0 = (RTYPE)__msa_ilvr_w((v4i32)in0, (v4i32)in1); \ + out1 = (RTYPE)__msa_ilvl_w((v4i32)in0, (v4i32)in1); \ +} +#define ILVRL_W2_UB(...) ILVRL_W2(v16u8, __VA_ARGS__) +#define ILVRL_W2_SH(...) ILVRL_W2(v8i16, __VA_ARGS__) +#define ILVRL_W2_SW(...) ILVRL_W2(v4i32, __VA_ARGS__) + +/* Description : Pack even byte elements of vector pairs + * Arguments : Inputs - in0, in1, in2, in3 + * Outputs - out0, out1 + * Return Type - as per RTYPE + * Details : Even byte elements of 'in0' are copied to the left half of + * 'out0' & even byte elements of 'in1' are copied to the right + * half of 'out0'. + */ +#define PCKEV_B2(RTYPE, in0, in1, in2, in3, out0, out1) { \ + out0 = (RTYPE)__msa_pckev_b((v16i8)in0, (v16i8)in1); \ + out1 = (RTYPE)__msa_pckev_b((v16i8)in2, (v16i8)in3); \ +} +#define PCKEV_B2_SB(...) PCKEV_B2(v16i8, __VA_ARGS__) +#define PCKEV_B2_UB(...) PCKEV_B2(v16u8, __VA_ARGS__) +#define PCKEV_B2_SH(...) PCKEV_B2(v8i16, __VA_ARGS__) +#define PCKEV_B2_SW(...) PCKEV_B2(v4i32, __VA_ARGS__) + +/* Description : Arithmetic immediate shift right all elements of word vector + * Arguments : Inputs - in0, in1, shift + * Outputs - in place operation + * Return Type - as per input vector RTYPE + * Details : Each element of vector 'in0' is right shifted by 'shift' and + * the result is written in-place. 'shift' is a GP variable. + */ +#define SRAI_W2(RTYPE, in0, in1, shift_val) { \ + in0 = (RTYPE)SRAI_W(in0, shift_val); \ + in1 = (RTYPE)SRAI_W(in1, shift_val); \ +} +#define SRAI_W2_SW(...) SRAI_W2(v4i32, __VA_ARGS__) +#define SRAI_W2_UW(...) SRAI_W2(v4u32, __VA_ARGS__) + +#define SRAI_W4(RTYPE, in0, in1, in2, in3, shift_val) { \ + SRAI_W2(RTYPE, in0, in1, shift_val); \ + SRAI_W2(RTYPE, in2, in3, shift_val); \ +} +#define SRAI_W4_SW(...) SRAI_W4(v4i32, __VA_ARGS__) +#define SRAI_W4_UW(...) SRAI_W4(v4u32, __VA_ARGS__) + +/* Description : Arithmetic shift right all elements of half-word vector + * Arguments : Inputs - in0, in1, shift + * Outputs - in place operation + * Return Type - as per input vector RTYPE + * Details : Each element of vector 'in0' is right shifted by 'shift' and + * the result is written in-place. 'shift' is a GP variable. + */ +#define SRAI_H2(RTYPE, in0, in1, shift_val) { \ + in0 = (RTYPE)SRAI_H(in0, shift_val); \ + in1 = (RTYPE)SRAI_H(in1, shift_val); \ +} +#define SRAI_H2_SH(...) SRAI_H2(v8i16, __VA_ARGS__) +#define SRAI_H2_UH(...) SRAI_H2(v8u16, __VA_ARGS__) + +/* Description : Arithmetic rounded shift right all elements of word vector + * Arguments : Inputs - in0, in1, shift + * Outputs - in place operation + * Return Type - as per input vector RTYPE + * Details : Each element of vector 'in0' is right shifted by 'shift' and + * the result is written in-place. 'shift' is a GP variable. + */ +#define SRARI_W2(RTYPE, in0, in1, shift) { \ + in0 = (RTYPE)__msa_srari_w((v4i32)in0, shift); \ + in1 = (RTYPE)__msa_srari_w((v4i32)in1, shift); \ +} +#define SRARI_W2_SW(...) SRARI_W2(v4i32, __VA_ARGS__) + +#define SRARI_W4(RTYPE, in0, in1, in2, in3, shift) { \ + SRARI_W2(RTYPE, in0, in1, shift); \ + SRARI_W2(RTYPE, in2, in3, shift); \ +} +#define SRARI_W4_SH(...) SRARI_W4(v8i16, __VA_ARGS__) +#define SRARI_W4_UW(...) SRARI_W4(v4u32, __VA_ARGS__) +#define SRARI_W4_SW(...) SRARI_W4(v4i32, __VA_ARGS__) + +/* Description : Addition of 2 pairs of half-word vectors + * Arguments : Inputs - in0, in1, in2, in3 + * Outputs - out0, out1 + * Details : Each element in 'in0' is added to 'in1' and result is written + * to 'out0'. + */ +#define ADDVI_H2(RTYPE, in0, in1, in2, in3, out0, out1) { \ + out0 = (RTYPE)ADDVI_H(in0, in1); \ + out1 = (RTYPE)ADDVI_H(in2, in3); \ +} +#define ADDVI_H2_SH(...) ADDVI_H2(v8i16, __VA_ARGS__) +#define ADDVI_H2_UH(...) ADDVI_H2(v8u16, __VA_ARGS__) + +/* Description : Addition of 2 pairs of vectors + * Arguments : Inputs - in0, in1, in2, in3 + * Outputs - out0, out1 + * Details : Each element in 'in0' is added to 'in1' and result is written + * to 'out0'. + */ +#define ADD2(in0, in1, in2, in3, out0, out1) { \ + out0 = in0 + in1; \ + out1 = in2 + in3; \ +} +#define ADD4(in0, in1, in2, in3, in4, in5, in6, in7, \ + out0, out1, out2, out3) { \ + ADD2(in0, in1, in2, in3, out0, out1); \ + ADD2(in4, in5, in6, in7, out2, out3); \ +} + +/* Description : Sign extend halfword elements from input vector and return + * the result in pair of vectors + * Arguments : Input - in (halfword vector) + * Outputs - out0, out1 (sign extended word vectors) + * Return Type - signed word + * Details : Sign bit of halfword elements from input vector 'in' is + * extracted and interleaved right with same vector 'in0' to + * generate 4 signed word elements in 'out0' + * Then interleaved left with same vector 'in0' to + * generate 4 signed word elements in 'out1' + */ +#define UNPCK_SH_SW(in, out0, out1) { \ + const v8i16 tmp_m = __msa_clti_s_h((v8i16)in, 0); \ + ILVRL_H2_SW(tmp_m, in, out0, out1); \ +} + +/* Description : Butterfly of 4 input vectors + * Arguments : Inputs - in0, in1, in2, in3 + * Outputs - out0, out1, out2, out3 + * Details : Butterfly operation + */ +#define BUTTERFLY_4(in0, in1, in2, in3, out0, out1, out2, out3) { \ + out0 = in0 + in3; \ + out1 = in1 + in2; \ + out2 = in1 - in2; \ + out3 = in0 - in3; \ +} + +/* Description : Transpose 4x4 block with word elements in vectors + * Arguments : Inputs - in0, in1, in2, in3 + * Outputs - out0, out1, out2, out3 + * Return Type - as per RTYPE + */ +#define TRANSPOSE4x4_W(RTYPE, in0, in1, in2, in3, out0, out1, out2, out3) { \ + v4i32 s0_m, s1_m, s2_m, s3_m; \ + ILVRL_W2_SW(in1, in0, s0_m, s1_m); \ + ILVRL_W2_SW(in3, in2, s2_m, s3_m); \ + out0 = (RTYPE)__msa_ilvr_d((v2i64)s2_m, (v2i64)s0_m); \ + out1 = (RTYPE)__msa_ilvl_d((v2i64)s2_m, (v2i64)s0_m); \ + out2 = (RTYPE)__msa_ilvr_d((v2i64)s3_m, (v2i64)s1_m); \ + out3 = (RTYPE)__msa_ilvl_d((v2i64)s3_m, (v2i64)s1_m); \ +} +#define TRANSPOSE4x4_SW_SW(...) TRANSPOSE4x4_W(v4i32, __VA_ARGS__) + +/* Description : Add block 4x4 + * Arguments : Inputs - in0, in1, in2, in3, pdst, stride + * Details : Least significant 4 bytes from each input vector are added to + * the destination bytes, clipped between 0-255 and stored. + */ +#define ADDBLK_ST4x4_UB(in0, in1, in2, in3, pdst, stride) { \ + uint32_t src0_m, src1_m, src2_m, src3_m; \ + v8i16 inp0_m, inp1_m, res0_m, res1_m; \ + v16i8 dst0_m = { 0 }; \ + v16i8 dst1_m = { 0 }; \ + const v16i8 zero_m = { 0 }; \ + ILVR_D2_SH(in1, in0, in3, in2, inp0_m, inp1_m); \ + LW4(pdst, stride, src0_m, src1_m, src2_m, src3_m); \ + INSERT_W2_SB(src0_m, src1_m, dst0_m); \ + INSERT_W2_SB(src2_m, src3_m, dst1_m); \ + ILVR_B2_SH(zero_m, dst0_m, zero_m, dst1_m, res0_m, res1_m); \ + ADD2(res0_m, inp0_m, res1_m, inp1_m, res0_m, res1_m); \ + CLIP_SH2_0_255(res0_m, res1_m); \ + PCKEV_B2_SB(res0_m, res0_m, res1_m, res1_m, dst0_m, dst1_m); \ + ST4x4_UB(dst0_m, dst1_m, 0, 1, 0, 1, pdst, stride); \ +} + +#endif /* WEBP_DSP_MSA_MACRO_H_ */ diff --git a/thirdparty/libwebp/dsp/neon.h b/thirdparty/libwebp/dsp/neon.h new file mode 100644 index 0000000000..0a06266848 --- /dev/null +++ b/thirdparty/libwebp/dsp/neon.h @@ -0,0 +1,82 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// NEON common code. + +#ifndef WEBP_DSP_NEON_H_ +#define WEBP_DSP_NEON_H_ + +#include <arm_neon.h> + +#include "./dsp.h" + +// Right now, some intrinsics functions seem slower, so we disable them +// everywhere except aarch64 where the inline assembly is incompatible. +#if defined(__aarch64__) +#define WEBP_USE_INTRINSICS // use intrinsics when possible +#endif + +#define INIT_VECTOR2(v, a, b) do { \ + v.val[0] = a; \ + v.val[1] = b; \ +} while (0) + +#define INIT_VECTOR3(v, a, b, c) do { \ + v.val[0] = a; \ + v.val[1] = b; \ + v.val[2] = c; \ +} while (0) + +#define INIT_VECTOR4(v, a, b, c, d) do { \ + v.val[0] = a; \ + v.val[1] = b; \ + v.val[2] = c; \ + v.val[3] = d; \ +} while (0) + +// if using intrinsics, this flag avoids some functions that make gcc-4.6.3 +// crash ("internal compiler error: in immed_double_const, at emit-rtl."). +// (probably similar to gcc.gnu.org/bugzilla/show_bug.cgi?id=48183) +#if !(LOCAL_GCC_PREREQ(4,8) || defined(__aarch64__)) +#define WORK_AROUND_GCC +#endif + +static WEBP_INLINE int32x4x4_t Transpose4x4(const int32x4x4_t rows) { + uint64x2x2_t row01, row23; + + row01.val[0] = vreinterpretq_u64_s32(rows.val[0]); + row01.val[1] = vreinterpretq_u64_s32(rows.val[1]); + row23.val[0] = vreinterpretq_u64_s32(rows.val[2]); + row23.val[1] = vreinterpretq_u64_s32(rows.val[3]); + // Transpose 64-bit values (there's no vswp equivalent) + { + const uint64x1_t row0h = vget_high_u64(row01.val[0]); + const uint64x1_t row2l = vget_low_u64(row23.val[0]); + const uint64x1_t row1h = vget_high_u64(row01.val[1]); + const uint64x1_t row3l = vget_low_u64(row23.val[1]); + row01.val[0] = vcombine_u64(vget_low_u64(row01.val[0]), row2l); + row23.val[0] = vcombine_u64(row0h, vget_high_u64(row23.val[0])); + row01.val[1] = vcombine_u64(vget_low_u64(row01.val[1]), row3l); + row23.val[1] = vcombine_u64(row1h, vget_high_u64(row23.val[1])); + } + { + const int32x4x2_t out01 = vtrnq_s32(vreinterpretq_s32_u64(row01.val[0]), + vreinterpretq_s32_u64(row01.val[1])); + const int32x4x2_t out23 = vtrnq_s32(vreinterpretq_s32_u64(row23.val[0]), + vreinterpretq_s32_u64(row23.val[1])); + int32x4x4_t out; + out.val[0] = out01.val[0]; + out.val[1] = out01.val[1]; + out.val[2] = out23.val[0]; + out.val[3] = out23.val[1]; + return out; + } +} + +#endif // WEBP_DSP_NEON_H_ diff --git a/thirdparty/libwebp/dsp/rescaler.c b/thirdparty/libwebp/dsp/rescaler.c new file mode 100644 index 0000000000..bc743d5dc5 --- /dev/null +++ b/thirdparty/libwebp/dsp/rescaler.c @@ -0,0 +1,238 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> + +#include "./dsp.h" +#include "../utils/rescaler.h" + +//------------------------------------------------------------------------------ +// Implementations of critical functions ImportRow / ExportRow + +#define ROUNDER (WEBP_RESCALER_ONE >> 1) +#define MULT_FIX(x, y) (((uint64_t)(x) * (y) + ROUNDER) >> WEBP_RESCALER_RFIX) + +//------------------------------------------------------------------------------ +// Row import + +void WebPRescalerImportRowExpandC(WebPRescaler* const wrk, const uint8_t* src) { + const int x_stride = wrk->num_channels; + const int x_out_max = wrk->dst_width * wrk->num_channels; + int channel; + assert(!WebPRescalerInputDone(wrk)); + assert(wrk->x_expand); + for (channel = 0; channel < x_stride; ++channel) { + int x_in = channel; + int x_out = channel; + // simple bilinear interpolation + int accum = wrk->x_add; + int left = src[x_in]; + int right = (wrk->src_width > 1) ? src[x_in + x_stride] : left; + x_in += x_stride; + while (1) { + wrk->frow[x_out] = right * wrk->x_add + (left - right) * accum; + x_out += x_stride; + if (x_out >= x_out_max) break; + accum -= wrk->x_sub; + if (accum < 0) { + left = right; + x_in += x_stride; + assert(x_in < wrk->src_width * x_stride); + right = src[x_in]; + accum += wrk->x_add; + } + } + assert(wrk->x_sub == 0 /* <- special case for src_width=1 */ || accum == 0); + } +} + +void WebPRescalerImportRowShrinkC(WebPRescaler* const wrk, const uint8_t* src) { + const int x_stride = wrk->num_channels; + const int x_out_max = wrk->dst_width * wrk->num_channels; + int channel; + assert(!WebPRescalerInputDone(wrk)); + assert(!wrk->x_expand); + for (channel = 0; channel < x_stride; ++channel) { + int x_in = channel; + int x_out = channel; + uint32_t sum = 0; + int accum = 0; + while (x_out < x_out_max) { + uint32_t base = 0; + accum += wrk->x_add; + while (accum > 0) { + accum -= wrk->x_sub; + assert(x_in < wrk->src_width * x_stride); + base = src[x_in]; + sum += base; + x_in += x_stride; + } + { // Emit next horizontal pixel. + const rescaler_t frac = base * (-accum); + wrk->frow[x_out] = sum * wrk->x_sub - frac; + // fresh fractional start for next pixel + sum = (int)MULT_FIX(frac, wrk->fx_scale); + } + x_out += x_stride; + } + assert(accum == 0); + } +} + +//------------------------------------------------------------------------------ +// Row export + +void WebPRescalerExportRowExpandC(WebPRescaler* const wrk) { + int x_out; + uint8_t* const dst = wrk->dst; + rescaler_t* const irow = wrk->irow; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const rescaler_t* const frow = wrk->frow; + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(wrk->y_expand); + assert(wrk->y_sub != 0); + if (wrk->y_accum == 0) { + for (x_out = 0; x_out < x_out_max; ++x_out) { + const uint32_t J = frow[x_out]; + const int v = (int)MULT_FIX(J, wrk->fy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + } + } else { + const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub); + const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B); + for (x_out = 0; x_out < x_out_max; ++x_out) { + const uint64_t I = (uint64_t)A * frow[x_out] + + (uint64_t)B * irow[x_out]; + const uint32_t J = (uint32_t)((I + ROUNDER) >> WEBP_RESCALER_RFIX); + const int v = (int)MULT_FIX(J, wrk->fy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + } + } +} + +void WebPRescalerExportRowShrinkC(WebPRescaler* const wrk) { + int x_out; + uint8_t* const dst = wrk->dst; + rescaler_t* const irow = wrk->irow; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const rescaler_t* const frow = wrk->frow; + const uint32_t yscale = wrk->fy_scale * (-wrk->y_accum); + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(!wrk->y_expand); + if (yscale) { + for (x_out = 0; x_out < x_out_max; ++x_out) { + const uint32_t frac = (uint32_t)MULT_FIX(frow[x_out], yscale); + const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + irow[x_out] = frac; // new fractional start + } + } else { + for (x_out = 0; x_out < x_out_max; ++x_out) { + const int v = (int)MULT_FIX(irow[x_out], wrk->fxy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + irow[x_out] = 0; + } + } +} + +#undef MULT_FIX +#undef ROUNDER + +//------------------------------------------------------------------------------ +// Main entry calls + +void WebPRescalerImportRow(WebPRescaler* const wrk, const uint8_t* src) { + assert(!WebPRescalerInputDone(wrk)); + if (!wrk->x_expand) { + WebPRescalerImportRowShrink(wrk, src); + } else { + WebPRescalerImportRowExpand(wrk, src); + } +} + +void WebPRescalerExportRow(WebPRescaler* const wrk) { + if (wrk->y_accum <= 0) { + assert(!WebPRescalerOutputDone(wrk)); + if (wrk->y_expand) { + WebPRescalerExportRowExpand(wrk); + } else if (wrk->fxy_scale) { + WebPRescalerExportRowShrink(wrk); + } else { // very special case for src = dst = 1x1 + int i; + assert(wrk->src_width == 1 && wrk->dst_width <= 2); + assert(wrk->src_height == 1 && wrk->dst_height == 1); + for (i = 0; i < wrk->num_channels * wrk->dst_width; ++i) { + wrk->dst[i] = wrk->irow[i]; + wrk->irow[i] = 0; + } + } + wrk->y_accum += wrk->y_add; + wrk->dst += wrk->dst_stride; + ++wrk->dst_y; + } +} + +//------------------------------------------------------------------------------ + +WebPRescalerImportRowFunc WebPRescalerImportRowExpand; +WebPRescalerImportRowFunc WebPRescalerImportRowShrink; + +WebPRescalerExportRowFunc WebPRescalerExportRowExpand; +WebPRescalerExportRowFunc WebPRescalerExportRowShrink; + +extern void WebPRescalerDspInitSSE2(void); +extern void WebPRescalerDspInitMIPS32(void); +extern void WebPRescalerDspInitMIPSdspR2(void); +extern void WebPRescalerDspInitNEON(void); + +static volatile VP8CPUInfo rescaler_last_cpuinfo_used = + (VP8CPUInfo)&rescaler_last_cpuinfo_used; + +WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInit(void) { + if (rescaler_last_cpuinfo_used == VP8GetCPUInfo) return; + + WebPRescalerImportRowExpand = WebPRescalerImportRowExpandC; + WebPRescalerImportRowShrink = WebPRescalerImportRowShrinkC; + WebPRescalerExportRowExpand = WebPRescalerExportRowExpandC; + WebPRescalerExportRowShrink = WebPRescalerExportRowShrinkC; + + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPRescalerDspInitSSE2(); + } +#endif +#if defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + WebPRescalerDspInitNEON(); + } +#endif +#if defined(WEBP_USE_MIPS32) + if (VP8GetCPUInfo(kMIPS32)) { + WebPRescalerDspInitMIPS32(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + WebPRescalerDspInitMIPSdspR2(); + } +#endif + } + rescaler_last_cpuinfo_used = VP8GetCPUInfo; +} diff --git a/thirdparty/libwebp/dsp/rescaler_mips32.c b/thirdparty/libwebp/dsp/rescaler_mips32.c new file mode 100644 index 0000000000..ddaa391336 --- /dev/null +++ b/thirdparty/libwebp/dsp/rescaler_mips32.c @@ -0,0 +1,291 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS version of rescaling functions +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS32) + +#include <assert.h> +#include "../utils/rescaler.h" + +//------------------------------------------------------------------------------ +// Row import + +static void ImportRowShrink(WebPRescaler* const wrk, const uint8_t* src) { + const int x_stride = wrk->num_channels; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const int fx_scale = wrk->fx_scale; + const int x_add = wrk->x_add; + const int x_sub = wrk->x_sub; + const int x_stride1 = x_stride << 2; + int channel; + assert(!wrk->x_expand); + assert(!WebPRescalerInputDone(wrk)); + + for (channel = 0; channel < x_stride; ++channel) { + const uint8_t* src1 = src + channel; + rescaler_t* frow = wrk->frow + channel; + int temp1, temp2, temp3; + int base, frac, sum; + int accum, accum1; + int loop_c = x_out_max - channel; + + __asm__ volatile ( + "li %[temp1], 0x8000 \n\t" + "li %[temp2], 0x10000 \n\t" + "li %[sum], 0 \n\t" + "li %[accum], 0 \n\t" + "1: \n\t" + "addu %[accum], %[accum], %[x_add] \n\t" + "li %[base], 0 \n\t" + "blez %[accum], 3f \n\t" + "2: \n\t" + "lbu %[base], 0(%[src1]) \n\t" + "subu %[accum], %[accum], %[x_sub] \n\t" + "addu %[src1], %[src1], %[x_stride] \n\t" + "addu %[sum], %[sum], %[base] \n\t" + "bgtz %[accum], 2b \n\t" + "3: \n\t" + "negu %[accum1], %[accum] \n\t" + "mul %[frac], %[base], %[accum1] \n\t" + "mul %[temp3], %[sum], %[x_sub] \n\t" + "subu %[loop_c], %[loop_c], %[x_stride] \n\t" + "mult %[temp1], %[temp2] \n\t" + "maddu %[frac], %[fx_scale] \n\t" + "mfhi %[sum] \n\t" + "subu %[temp3], %[temp3], %[frac] \n\t" + "sw %[temp3], 0(%[frow]) \n\t" + "addu %[frow], %[frow], %[x_stride1] \n\t" + "bgtz %[loop_c], 1b \n\t" + : [accum]"=&r"(accum), [src1]"+r"(src1), [temp3]"=&r"(temp3), + [sum]"=&r"(sum), [base]"=&r"(base), [frac]"=&r"(frac), + [frow]"+r"(frow), [accum1]"=&r"(accum1), + [temp2]"=&r"(temp2), [temp1]"=&r"(temp1) + : [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale), + [x_sub]"r"(x_sub), [x_add]"r"(x_add), + [loop_c]"r"(loop_c), [x_stride1]"r"(x_stride1) + : "memory", "hi", "lo" + ); + assert(accum == 0); + } +} + +static void ImportRowExpand(WebPRescaler* const wrk, const uint8_t* src) { + const int x_stride = wrk->num_channels; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const int x_add = wrk->x_add; + const int x_sub = wrk->x_sub; + const int src_width = wrk->src_width; + const int x_stride1 = x_stride << 2; + int channel; + assert(wrk->x_expand); + assert(!WebPRescalerInputDone(wrk)); + + for (channel = 0; channel < x_stride; ++channel) { + const uint8_t* src1 = src + channel; + rescaler_t* frow = wrk->frow + channel; + int temp1, temp2, temp3, temp4; + int frac; + int accum; + int x_out = channel; + + __asm__ volatile ( + "addiu %[temp3], %[src_width], -1 \n\t" + "lbu %[temp2], 0(%[src1]) \n\t" + "addu %[src1], %[src1], %[x_stride] \n\t" + "bgtz %[temp3], 0f \n\t" + "addiu %[temp1], %[temp2], 0 \n\t" + "b 3f \n\t" + "0: \n\t" + "lbu %[temp1], 0(%[src1]) \n\t" + "3: \n\t" + "addiu %[accum], %[x_add], 0 \n\t" + "1: \n\t" + "subu %[temp3], %[temp2], %[temp1] \n\t" + "mul %[temp3], %[temp3], %[accum] \n\t" + "mul %[temp4], %[temp1], %[x_add] \n\t" + "addu %[temp3], %[temp4], %[temp3] \n\t" + "sw %[temp3], 0(%[frow]) \n\t" + "addu %[frow], %[frow], %[x_stride1] \n\t" + "addu %[x_out], %[x_out], %[x_stride] \n\t" + "subu %[temp3], %[x_out], %[x_out_max] \n\t" + "bgez %[temp3], 2f \n\t" + "subu %[accum], %[accum], %[x_sub] \n\t" + "bgez %[accum], 4f \n\t" + "addiu %[temp2], %[temp1], 0 \n\t" + "addu %[src1], %[src1], %[x_stride] \n\t" + "lbu %[temp1], 0(%[src1]) \n\t" + "addu %[accum], %[accum], %[x_add] \n\t" + "4: \n\t" + "b 1b \n\t" + "2: \n\t" + : [src1]"+r"(src1), [accum]"=&r"(accum), [temp1]"=&r"(temp1), + [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), + [x_out]"+r"(x_out), [frac]"=&r"(frac), [frow]"+r"(frow) + : [x_stride]"r"(x_stride), [x_add]"r"(x_add), [x_sub]"r"(x_sub), + [x_stride1]"r"(x_stride1), [src_width]"r"(src_width), + [x_out_max]"r"(x_out_max) + : "memory", "hi", "lo" + ); + assert(wrk->x_sub == 0 /* <- special case for src_width=1 */ || accum == 0); + } +} + +//------------------------------------------------------------------------------ +// Row export + +static void ExportRowExpand(WebPRescaler* const wrk) { + uint8_t* dst = wrk->dst; + rescaler_t* irow = wrk->irow; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const rescaler_t* frow = wrk->frow; + int temp0, temp1, temp3, temp4, temp5, loop_end; + const int temp2 = (int)wrk->fy_scale; + const int temp6 = x_out_max << 2; + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(wrk->y_expand); + assert(wrk->y_sub != 0); + if (wrk->y_accum == 0) { + __asm__ volatile ( + "li %[temp3], 0x10000 \n\t" + "li %[temp4], 0x8000 \n\t" + "addu %[loop_end], %[frow], %[temp6] \n\t" + "1: \n\t" + "lw %[temp0], 0(%[frow]) \n\t" + "addiu %[dst], %[dst], 1 \n\t" + "addiu %[frow], %[frow], 4 \n\t" + "mult %[temp3], %[temp4] \n\t" + "maddu %[temp0], %[temp2] \n\t" + "mfhi %[temp5] \n\t" + "sb %[temp5], -1(%[dst]) \n\t" + "bne %[frow], %[loop_end], 1b \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), + [dst]"+r"(dst), [loop_end]"=&r"(loop_end) + : [temp2]"r"(temp2), [temp6]"r"(temp6) + : "memory", "hi", "lo" + ); + } else { + const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub); + const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B); + __asm__ volatile ( + "li %[temp3], 0x10000 \n\t" + "li %[temp4], 0x8000 \n\t" + "addu %[loop_end], %[frow], %[temp6] \n\t" + "1: \n\t" + "lw %[temp0], 0(%[frow]) \n\t" + "lw %[temp1], 0(%[irow]) \n\t" + "addiu %[dst], %[dst], 1 \n\t" + "mult %[temp3], %[temp4] \n\t" + "maddu %[A], %[temp0] \n\t" + "maddu %[B], %[temp1] \n\t" + "addiu %[frow], %[frow], 4 \n\t" + "addiu %[irow], %[irow], 4 \n\t" + "mfhi %[temp5] \n\t" + "mult %[temp3], %[temp4] \n\t" + "maddu %[temp5], %[temp2] \n\t" + "mfhi %[temp5] \n\t" + "sb %[temp5], -1(%[dst]) \n\t" + "bne %[frow], %[loop_end], 1b \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), + [irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end) + : [temp2]"r"(temp2), [temp6]"r"(temp6), [A]"r"(A), [B]"r"(B) + : "memory", "hi", "lo" + ); + } +} + +static void ExportRowShrink(WebPRescaler* const wrk) { + const int x_out_max = wrk->dst_width * wrk->num_channels; + uint8_t* dst = wrk->dst; + rescaler_t* irow = wrk->irow; + const rescaler_t* frow = wrk->frow; + const int yscale = wrk->fy_scale * (-wrk->y_accum); + int temp0, temp1, temp3, temp4, temp5, loop_end; + const int temp2 = (int)wrk->fxy_scale; + const int temp6 = x_out_max << 2; + + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(!wrk->y_expand); + assert(wrk->fxy_scale != 0); + if (yscale) { + __asm__ volatile ( + "li %[temp3], 0x10000 \n\t" + "li %[temp4], 0x8000 \n\t" + "addu %[loop_end], %[frow], %[temp6] \n\t" + "1: \n\t" + "lw %[temp0], 0(%[frow]) \n\t" + "mult %[temp3], %[temp4] \n\t" + "addiu %[frow], %[frow], 4 \n\t" + "maddu %[temp0], %[yscale] \n\t" + "mfhi %[temp1] \n\t" + "lw %[temp0], 0(%[irow]) \n\t" + "addiu %[dst], %[dst], 1 \n\t" + "addiu %[irow], %[irow], 4 \n\t" + "subu %[temp0], %[temp0], %[temp1] \n\t" + "mult %[temp3], %[temp4] \n\t" + "maddu %[temp0], %[temp2] \n\t" + "mfhi %[temp5] \n\t" + "sw %[temp1], -4(%[irow]) \n\t" + "sb %[temp5], -1(%[dst]) \n\t" + "bne %[frow], %[loop_end], 1b \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), + [irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end) + : [temp2]"r"(temp2), [yscale]"r"(yscale), [temp6]"r"(temp6) + : "memory", "hi", "lo" + ); + } else { + __asm__ volatile ( + "li %[temp3], 0x10000 \n\t" + "li %[temp4], 0x8000 \n\t" + "addu %[loop_end], %[irow], %[temp6] \n\t" + "1: \n\t" + "lw %[temp0], 0(%[irow]) \n\t" + "addiu %[dst], %[dst], 1 \n\t" + "addiu %[irow], %[irow], 4 \n\t" + "mult %[temp3], %[temp4] \n\t" + "maddu %[temp0], %[temp2] \n\t" + "mfhi %[temp5] \n\t" + "sw $zero, -4(%[irow]) \n\t" + "sb %[temp5], -1(%[dst]) \n\t" + "bne %[irow], %[loop_end], 1b \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [irow]"+r"(irow), + [dst]"+r"(dst), [loop_end]"=&r"(loop_end) + : [temp2]"r"(temp2), [temp6]"r"(temp6) + : "memory", "hi", "lo" + ); + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPRescalerDspInitMIPS32(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void) { + WebPRescalerImportRowExpand = ImportRowExpand; + WebPRescalerImportRowShrink = ImportRowShrink; + WebPRescalerExportRowExpand = ExportRowExpand; + WebPRescalerExportRowShrink = ExportRowShrink; +} + +#else // !WEBP_USE_MIPS32 + +WEBP_DSP_INIT_STUB(WebPRescalerDspInitMIPS32) + +#endif // WEBP_USE_MIPS32 diff --git a/thirdparty/libwebp/dsp/rescaler_mips_dsp_r2.c b/thirdparty/libwebp/dsp/rescaler_mips_dsp_r2.c new file mode 100644 index 0000000000..b457d0a30a --- /dev/null +++ b/thirdparty/libwebp/dsp/rescaler_mips_dsp_r2.c @@ -0,0 +1,314 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS version of rescaling functions +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include <assert.h> +#include "../utils/rescaler.h" + +#define ROUNDER (WEBP_RESCALER_ONE >> 1) +#define MULT_FIX(x, y) (((uint64_t)(x) * (y) + ROUNDER) >> WEBP_RESCALER_RFIX) + +//------------------------------------------------------------------------------ +// Row export + +static void ExportRowShrink(WebPRescaler* const wrk) { + int i; + const int x_out_max = wrk->dst_width * wrk->num_channels; + uint8_t* dst = wrk->dst; + rescaler_t* irow = wrk->irow; + const rescaler_t* frow = wrk->frow; + const int yscale = wrk->fy_scale * (-wrk->y_accum); + int temp0, temp1, temp2, temp3, temp4, temp5, loop_end; + const int temp7 = (int)wrk->fxy_scale; + const int temp6 = (x_out_max & ~0x3) << 2; + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(!wrk->y_expand); + assert(wrk->fxy_scale != 0); + if (yscale) { + if (x_out_max >= 4) { + int temp8, temp9, temp10, temp11; + __asm__ volatile ( + "li %[temp3], 0x10000 \n\t" + "li %[temp4], 0x8000 \n\t" + "addu %[loop_end], %[frow], %[temp6] \n\t" + "1: \n\t" + "lw %[temp0], 0(%[frow]) \n\t" + "lw %[temp1], 4(%[frow]) \n\t" + "lw %[temp2], 8(%[frow]) \n\t" + "lw %[temp5], 12(%[frow]) \n\t" + "mult $ac0, %[temp3], %[temp4] \n\t" + "maddu $ac0, %[temp0], %[yscale] \n\t" + "mult $ac1, %[temp3], %[temp4] \n\t" + "maddu $ac1, %[temp1], %[yscale] \n\t" + "mult $ac2, %[temp3], %[temp4] \n\t" + "maddu $ac2, %[temp2], %[yscale] \n\t" + "mult $ac3, %[temp3], %[temp4] \n\t" + "maddu $ac3, %[temp5], %[yscale] \n\t" + "addiu %[frow], %[frow], 16 \n\t" + "mfhi %[temp0], $ac0 \n\t" + "mfhi %[temp1], $ac1 \n\t" + "mfhi %[temp2], $ac2 \n\t" + "mfhi %[temp5], $ac3 \n\t" + "lw %[temp8], 0(%[irow]) \n\t" + "lw %[temp9], 4(%[irow]) \n\t" + "lw %[temp10], 8(%[irow]) \n\t" + "lw %[temp11], 12(%[irow]) \n\t" + "addiu %[dst], %[dst], 4 \n\t" + "addiu %[irow], %[irow], 16 \n\t" + "subu %[temp8], %[temp8], %[temp0] \n\t" + "subu %[temp9], %[temp9], %[temp1] \n\t" + "subu %[temp10], %[temp10], %[temp2] \n\t" + "subu %[temp11], %[temp11], %[temp5] \n\t" + "mult $ac0, %[temp3], %[temp4] \n\t" + "maddu $ac0, %[temp8], %[temp7] \n\t" + "mult $ac1, %[temp3], %[temp4] \n\t" + "maddu $ac1, %[temp9], %[temp7] \n\t" + "mult $ac2, %[temp3], %[temp4] \n\t" + "maddu $ac2, %[temp10], %[temp7] \n\t" + "mult $ac3, %[temp3], %[temp4] \n\t" + "maddu $ac3, %[temp11], %[temp7] \n\t" + "mfhi %[temp8], $ac0 \n\t" + "mfhi %[temp9], $ac1 \n\t" + "mfhi %[temp10], $ac2 \n\t" + "mfhi %[temp11], $ac3 \n\t" + "sw %[temp0], -16(%[irow]) \n\t" + "sw %[temp1], -12(%[irow]) \n\t" + "sw %[temp2], -8(%[irow]) \n\t" + "sw %[temp5], -4(%[irow]) \n\t" + "sb %[temp8], -4(%[dst]) \n\t" + "sb %[temp9], -3(%[dst]) \n\t" + "sb %[temp10], -2(%[dst]) \n\t" + "sb %[temp11], -1(%[dst]) \n\t" + "bne %[frow], %[loop_end], 1b \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), + [irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end), + [temp8]"=&r"(temp8), [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), + [temp11]"=&r"(temp11), [temp2]"=&r"(temp2) + : [temp7]"r"(temp7), [yscale]"r"(yscale), [temp6]"r"(temp6) + : "memory", "hi", "lo", "$ac1hi", "$ac1lo", + "$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo" + ); + } + for (i = 0; i < (x_out_max & 0x3); ++i) { + const uint32_t frac = (uint32_t)MULT_FIX(*frow++, yscale); + const int v = (int)MULT_FIX(*irow - frac, wrk->fxy_scale); + assert(v >= 0 && v <= 255); + *dst++ = v; + *irow++ = frac; // new fractional start + } + } else { + if (x_out_max >= 4) { + __asm__ volatile ( + "li %[temp3], 0x10000 \n\t" + "li %[temp4], 0x8000 \n\t" + "addu %[loop_end], %[irow], %[temp6] \n\t" + "1: \n\t" + "lw %[temp0], 0(%[irow]) \n\t" + "lw %[temp1], 4(%[irow]) \n\t" + "lw %[temp2], 8(%[irow]) \n\t" + "lw %[temp5], 12(%[irow]) \n\t" + "addiu %[dst], %[dst], 4 \n\t" + "addiu %[irow], %[irow], 16 \n\t" + "mult $ac0, %[temp3], %[temp4] \n\t" + "maddu $ac0, %[temp0], %[temp7] \n\t" + "mult $ac1, %[temp3], %[temp4] \n\t" + "maddu $ac1, %[temp1], %[temp7] \n\t" + "mult $ac2, %[temp3], %[temp4] \n\t" + "maddu $ac2, %[temp2], %[temp7] \n\t" + "mult $ac3, %[temp3], %[temp4] \n\t" + "maddu $ac3, %[temp5], %[temp7] \n\t" + "mfhi %[temp0], $ac0 \n\t" + "mfhi %[temp1], $ac1 \n\t" + "mfhi %[temp2], $ac2 \n\t" + "mfhi %[temp5], $ac3 \n\t" + "sw $zero, -16(%[irow]) \n\t" + "sw $zero, -12(%[irow]) \n\t" + "sw $zero, -8(%[irow]) \n\t" + "sw $zero, -4(%[irow]) \n\t" + "sb %[temp0], -4(%[dst]) \n\t" + "sb %[temp1], -3(%[dst]) \n\t" + "sb %[temp2], -2(%[dst]) \n\t" + "sb %[temp5], -1(%[dst]) \n\t" + "bne %[irow], %[loop_end], 1b \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [irow]"+r"(irow), + [dst]"+r"(dst), [loop_end]"=&r"(loop_end), [temp2]"=&r"(temp2) + : [temp7]"r"(temp7), [temp6]"r"(temp6) + : "memory", "hi", "lo", "$ac1hi", "$ac1lo", + "$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo" + ); + } + for (i = 0; i < (x_out_max & 0x3); ++i) { + const int v = (int)MULT_FIX(*irow, wrk->fxy_scale); + assert(v >= 0 && v <= 255); + *dst++ = v; + *irow++ = 0; + } + } +} + +static void ExportRowExpand(WebPRescaler* const wrk) { + int i; + uint8_t* dst = wrk->dst; + rescaler_t* irow = wrk->irow; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const rescaler_t* frow = wrk->frow; + int temp0, temp1, temp2, temp3, temp4, temp5, loop_end; + const int temp6 = (x_out_max & ~0x3) << 2; + const int temp7 = (int)wrk->fy_scale; + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(wrk->y_expand); + assert(wrk->y_sub != 0); + if (wrk->y_accum == 0) { + if (x_out_max >= 4) { + __asm__ volatile ( + "li %[temp4], 0x10000 \n\t" + "li %[temp5], 0x8000 \n\t" + "addu %[loop_end], %[frow], %[temp6] \n\t" + "1: \n\t" + "lw %[temp0], 0(%[frow]) \n\t" + "lw %[temp1], 4(%[frow]) \n\t" + "lw %[temp2], 8(%[frow]) \n\t" + "lw %[temp3], 12(%[frow]) \n\t" + "addiu %[dst], %[dst], 4 \n\t" + "addiu %[frow], %[frow], 16 \n\t" + "mult $ac0, %[temp4], %[temp5] \n\t" + "maddu $ac0, %[temp0], %[temp7] \n\t" + "mult $ac1, %[temp4], %[temp5] \n\t" + "maddu $ac1, %[temp1], %[temp7] \n\t" + "mult $ac2, %[temp4], %[temp5] \n\t" + "maddu $ac2, %[temp2], %[temp7] \n\t" + "mult $ac3, %[temp4], %[temp5] \n\t" + "maddu $ac3, %[temp3], %[temp7] \n\t" + "mfhi %[temp0], $ac0 \n\t" + "mfhi %[temp1], $ac1 \n\t" + "mfhi %[temp2], $ac2 \n\t" + "mfhi %[temp3], $ac3 \n\t" + "sb %[temp0], -4(%[dst]) \n\t" + "sb %[temp1], -3(%[dst]) \n\t" + "sb %[temp2], -2(%[dst]) \n\t" + "sb %[temp3], -1(%[dst]) \n\t" + "bne %[frow], %[loop_end], 1b \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), + [dst]"+r"(dst), [loop_end]"=&r"(loop_end), [temp2]"=&r"(temp2) + : [temp7]"r"(temp7), [temp6]"r"(temp6) + : "memory", "hi", "lo", "$ac1hi", "$ac1lo", + "$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo" + ); + } + for (i = 0; i < (x_out_max & 0x3); ++i) { + const uint32_t J = *frow++; + const int v = (int)MULT_FIX(J, wrk->fy_scale); + assert(v >= 0 && v <= 255); + *dst++ = v; + } + } else { + const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub); + const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B); + if (x_out_max >= 4) { + int temp8, temp9, temp10, temp11; + __asm__ volatile ( + "li %[temp8], 0x10000 \n\t" + "li %[temp9], 0x8000 \n\t" + "addu %[loop_end], %[frow], %[temp6] \n\t" + "1: \n\t" + "lw %[temp0], 0(%[frow]) \n\t" + "lw %[temp1], 4(%[frow]) \n\t" + "lw %[temp2], 8(%[frow]) \n\t" + "lw %[temp3], 12(%[frow]) \n\t" + "lw %[temp4], 0(%[irow]) \n\t" + "lw %[temp5], 4(%[irow]) \n\t" + "lw %[temp10], 8(%[irow]) \n\t" + "lw %[temp11], 12(%[irow]) \n\t" + "addiu %[dst], %[dst], 4 \n\t" + "mult $ac0, %[temp8], %[temp9] \n\t" + "maddu $ac0, %[A], %[temp0] \n\t" + "maddu $ac0, %[B], %[temp4] \n\t" + "mult $ac1, %[temp8], %[temp9] \n\t" + "maddu $ac1, %[A], %[temp1] \n\t" + "maddu $ac1, %[B], %[temp5] \n\t" + "mult $ac2, %[temp8], %[temp9] \n\t" + "maddu $ac2, %[A], %[temp2] \n\t" + "maddu $ac2, %[B], %[temp10] \n\t" + "mult $ac3, %[temp8], %[temp9] \n\t" + "maddu $ac3, %[A], %[temp3] \n\t" + "maddu $ac3, %[B], %[temp11] \n\t" + "addiu %[frow], %[frow], 16 \n\t" + "addiu %[irow], %[irow], 16 \n\t" + "mfhi %[temp0], $ac0 \n\t" + "mfhi %[temp1], $ac1 \n\t" + "mfhi %[temp2], $ac2 \n\t" + "mfhi %[temp3], $ac3 \n\t" + "mult $ac0, %[temp8], %[temp9] \n\t" + "maddu $ac0, %[temp0], %[temp7] \n\t" + "mult $ac1, %[temp8], %[temp9] \n\t" + "maddu $ac1, %[temp1], %[temp7] \n\t" + "mult $ac2, %[temp8], %[temp9] \n\t" + "maddu $ac2, %[temp2], %[temp7] \n\t" + "mult $ac3, %[temp8], %[temp9] \n\t" + "maddu $ac3, %[temp3], %[temp7] \n\t" + "mfhi %[temp0], $ac0 \n\t" + "mfhi %[temp1], $ac1 \n\t" + "mfhi %[temp2], $ac2 \n\t" + "mfhi %[temp3], $ac3 \n\t" + "sb %[temp0], -4(%[dst]) \n\t" + "sb %[temp1], -3(%[dst]) \n\t" + "sb %[temp2], -2(%[dst]) \n\t" + "sb %[temp3], -1(%[dst]) \n\t" + "bne %[frow], %[loop_end], 1b \n\t" + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), + [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), + [irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end), + [temp8]"=&r"(temp8), [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), + [temp11]"=&r"(temp11), [temp2]"=&r"(temp2) + : [temp7]"r"(temp7), [temp6]"r"(temp6), [A]"r"(A), [B]"r"(B) + : "memory", "hi", "lo", "$ac1hi", "$ac1lo", + "$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo" + ); + } + for (i = 0; i < (x_out_max & 0x3); ++i) { + const uint64_t I = (uint64_t)A * *frow++ + + (uint64_t)B * *irow++; + const uint32_t J = (uint32_t)((I + ROUNDER) >> WEBP_RESCALER_RFIX); + const int v = (int)MULT_FIX(J, wrk->fy_scale); + assert(v >= 0 && v <= 255); + *dst++ = v; + } + } +} + +#undef MULT_FIX +#undef ROUNDER + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPRescalerDspInitMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPSdspR2(void) { + WebPRescalerExportRowExpand = ExportRowExpand; + WebPRescalerExportRowShrink = ExportRowShrink; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(WebPRescalerDspInitMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/rescaler_neon.c b/thirdparty/libwebp/dsp/rescaler_neon.c new file mode 100644 index 0000000000..16fd450ea3 --- /dev/null +++ b/thirdparty/libwebp/dsp/rescaler_neon.c @@ -0,0 +1,186 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// NEON version of rescaling functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_NEON) + +#include <arm_neon.h> +#include <assert.h> +#include "./neon.h" +#include "../utils/rescaler.h" + +#define ROUNDER (WEBP_RESCALER_ONE >> 1) +#define MULT_FIX_C(x, y) (((uint64_t)(x) * (y) + ROUNDER) >> WEBP_RESCALER_RFIX) + +#define LOAD_32x4(SRC, DST) const uint32x4_t DST = vld1q_u32((SRC)) +#define LOAD_32x8(SRC, DST0, DST1) \ + LOAD_32x4(SRC + 0, DST0); \ + LOAD_32x4(SRC + 4, DST1) + +#define STORE_32x8(SRC0, SRC1, DST) do { \ + vst1q_u32((DST) + 0, SRC0); \ + vst1q_u32((DST) + 4, SRC1); \ +} while (0); + +#if (WEBP_RESCALER_RFIX == 32) +#define MAKE_HALF_CST(C) vdupq_n_s32((int32_t)((C) >> 1)) +#define MULT_FIX(A, B) /* note: B is actualy scale>>1. See MAKE_HALF_CST */ \ + vreinterpretq_u32_s32(vqrdmulhq_s32(vreinterpretq_s32_u32((A)), (B))) +#else +#error "MULT_FIX/WEBP_RESCALER_RFIX need some more work" +#endif + +static uint32x4_t Interpolate(const rescaler_t* const frow, + const rescaler_t* const irow, + uint32_t A, uint32_t B) { + LOAD_32x4(frow, A0); + LOAD_32x4(irow, B0); + const uint64x2_t C0 = vmull_n_u32(vget_low_u32(A0), A); + const uint64x2_t C1 = vmull_n_u32(vget_high_u32(A0), A); + const uint64x2_t D0 = vmlal_n_u32(C0, vget_low_u32(B0), B); + const uint64x2_t D1 = vmlal_n_u32(C1, vget_high_u32(B0), B); + const uint32x4_t E = vcombine_u32( + vrshrn_n_u64(D0, WEBP_RESCALER_RFIX), + vrshrn_n_u64(D1, WEBP_RESCALER_RFIX)); + return E; +} + +static void RescalerExportRowExpand(WebPRescaler* const wrk) { + int x_out; + uint8_t* const dst = wrk->dst; + rescaler_t* const irow = wrk->irow; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const int max_span = x_out_max & ~7; + const rescaler_t* const frow = wrk->frow; + const uint32_t fy_scale = wrk->fy_scale; + const int32x4_t fy_scale_half = MAKE_HALF_CST(fy_scale); + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(wrk->y_expand); + assert(wrk->y_sub != 0); + if (wrk->y_accum == 0) { + for (x_out = 0; x_out < max_span; x_out += 8) { + LOAD_32x4(frow + x_out + 0, A0); + LOAD_32x4(frow + x_out + 4, A1); + const uint32x4_t B0 = MULT_FIX(A0, fy_scale_half); + const uint32x4_t B1 = MULT_FIX(A1, fy_scale_half); + const uint16x4_t C0 = vmovn_u32(B0); + const uint16x4_t C1 = vmovn_u32(B1); + const uint8x8_t D = vmovn_u16(vcombine_u16(C0, C1)); + vst1_u8(dst + x_out, D); + } + for (; x_out < x_out_max; ++x_out) { + const uint32_t J = frow[x_out]; + const int v = (int)MULT_FIX_C(J, fy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + } + } else { + const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub); + const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B); + for (x_out = 0; x_out < max_span; x_out += 8) { + const uint32x4_t C0 = + Interpolate(frow + x_out + 0, irow + x_out + 0, A, B); + const uint32x4_t C1 = + Interpolate(frow + x_out + 4, irow + x_out + 4, A, B); + const uint32x4_t D0 = MULT_FIX(C0, fy_scale_half); + const uint32x4_t D1 = MULT_FIX(C1, fy_scale_half); + const uint16x4_t E0 = vmovn_u32(D0); + const uint16x4_t E1 = vmovn_u32(D1); + const uint8x8_t F = vmovn_u16(vcombine_u16(E0, E1)); + vst1_u8(dst + x_out, F); + } + for (; x_out < x_out_max; ++x_out) { + const uint64_t I = (uint64_t)A * frow[x_out] + + (uint64_t)B * irow[x_out]; + const uint32_t J = (uint32_t)((I + ROUNDER) >> WEBP_RESCALER_RFIX); + const int v = (int)MULT_FIX_C(J, fy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + } + } +} + +static void RescalerExportRowShrink(WebPRescaler* const wrk) { + int x_out; + uint8_t* const dst = wrk->dst; + rescaler_t* const irow = wrk->irow; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const int max_span = x_out_max & ~7; + const rescaler_t* const frow = wrk->frow; + const uint32_t yscale = wrk->fy_scale * (-wrk->y_accum); + const uint32_t fxy_scale = wrk->fxy_scale; + const uint32x4_t zero = vdupq_n_u32(0); + const int32x4_t yscale_half = MAKE_HALF_CST(yscale); + const int32x4_t fxy_scale_half = MAKE_HALF_CST(fxy_scale); + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(!wrk->y_expand); + if (yscale) { + for (x_out = 0; x_out < max_span; x_out += 8) { + LOAD_32x8(frow + x_out, in0, in1); + LOAD_32x8(irow + x_out, in2, in3); + const uint32x4_t A0 = MULT_FIX(in0, yscale_half); + const uint32x4_t A1 = MULT_FIX(in1, yscale_half); + const uint32x4_t B0 = vqsubq_u32(in2, A0); + const uint32x4_t B1 = vqsubq_u32(in3, A1); + const uint32x4_t C0 = MULT_FIX(B0, fxy_scale_half); + const uint32x4_t C1 = MULT_FIX(B1, fxy_scale_half); + const uint16x4_t D0 = vmovn_u32(C0); + const uint16x4_t D1 = vmovn_u32(C1); + const uint8x8_t E = vmovn_u16(vcombine_u16(D0, D1)); + vst1_u8(dst + x_out, E); + STORE_32x8(A0, A1, irow + x_out); + } + for (; x_out < x_out_max; ++x_out) { + const uint32_t frac = (uint32_t)MULT_FIX_C(frow[x_out], yscale); + const int v = (int)MULT_FIX_C(irow[x_out] - frac, wrk->fxy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + irow[x_out] = frac; // new fractional start + } + } else { + for (x_out = 0; x_out < max_span; x_out += 8) { + LOAD_32x8(irow + x_out, in0, in1); + const uint32x4_t A0 = MULT_FIX(in0, fxy_scale_half); + const uint32x4_t A1 = MULT_FIX(in1, fxy_scale_half); + const uint16x4_t B0 = vmovn_u32(A0); + const uint16x4_t B1 = vmovn_u32(A1); + const uint8x8_t C = vmovn_u16(vcombine_u16(B0, B1)); + vst1_u8(dst + x_out, C); + STORE_32x8(zero, zero, irow + x_out); + } + for (; x_out < x_out_max; ++x_out) { + const int v = (int)MULT_FIX_C(irow[x_out], fxy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + irow[x_out] = 0; + } + } +} + +//------------------------------------------------------------------------------ + +extern void WebPRescalerDspInitNEON(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitNEON(void) { + WebPRescalerExportRowExpand = RescalerExportRowExpand; + WebPRescalerExportRowShrink = RescalerExportRowShrink; +} + +#else // !WEBP_USE_NEON + +WEBP_DSP_INIT_STUB(WebPRescalerDspInitNEON) + +#endif // WEBP_USE_NEON diff --git a/thirdparty/libwebp/dsp/rescaler_sse2.c b/thirdparty/libwebp/dsp/rescaler_sse2.c new file mode 100644 index 0000000000..5b9702817c --- /dev/null +++ b/thirdparty/libwebp/dsp/rescaler_sse2.c @@ -0,0 +1,375 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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 Rescaling functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_SSE2) +#include <emmintrin.h> + +#include <assert.h> +#include "../utils/rescaler.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// Implementations of critical functions ImportRow / ExportRow + +#define ROUNDER (WEBP_RESCALER_ONE >> 1) +#define MULT_FIX(x, y) (((uint64_t)(x) * (y) + ROUNDER) >> WEBP_RESCALER_RFIX) + +// input: 8 bytes ABCDEFGH -> output: A0E0B0F0C0G0D0H0 +static void LoadTwoPixels(const uint8_t* const src, __m128i* out) { + const __m128i zero = _mm_setzero_si128(); + const __m128i A = _mm_loadl_epi64((const __m128i*)(src)); // ABCDEFGH + const __m128i B = _mm_unpacklo_epi8(A, zero); // A0B0C0D0E0F0G0H0 + const __m128i C = _mm_srli_si128(B, 8); // E0F0G0H0 + *out = _mm_unpacklo_epi16(B, C); +} + +// input: 8 bytes ABCDEFGH -> output: A0B0C0D0E0F0G0H0 +static void LoadHeightPixels(const uint8_t* const src, __m128i* out) { + const __m128i zero = _mm_setzero_si128(); + const __m128i A = _mm_loadl_epi64((const __m128i*)(src)); // ABCDEFGH + *out = _mm_unpacklo_epi8(A, zero); +} + +static void RescalerImportRowExpandSSE2(WebPRescaler* const wrk, + const uint8_t* src) { + rescaler_t* frow = wrk->frow; + const rescaler_t* const frow_end = frow + wrk->dst_width * wrk->num_channels; + const int x_add = wrk->x_add; + int accum = x_add; + __m128i cur_pixels; + + assert(!WebPRescalerInputDone(wrk)); + assert(wrk->x_expand); + if (wrk->num_channels == 4) { + if (wrk->src_width < 2) { + WebPRescalerImportRowExpandC(wrk, src); + return; + } + LoadTwoPixels(src, &cur_pixels); + src += 4; + while (1) { + const __m128i mult = _mm_set1_epi32(((x_add - accum) << 16) | accum); + const __m128i out = _mm_madd_epi16(cur_pixels, mult); + _mm_storeu_si128((__m128i*)frow, out); + frow += 4; + if (frow >= frow_end) break; + accum -= wrk->x_sub; + if (accum < 0) { + LoadTwoPixels(src, &cur_pixels); + src += 4; + accum += x_add; + } + } + } else { + int left; + const uint8_t* const src_limit = src + wrk->src_width - 8; + if (wrk->src_width < 8) { + WebPRescalerImportRowExpandC(wrk, src); + return; + } + LoadHeightPixels(src, &cur_pixels); + src += 7; + left = 7; + while (1) { + const __m128i mult = _mm_cvtsi32_si128(((x_add - accum) << 16) | accum); + const __m128i out = _mm_madd_epi16(cur_pixels, mult); + assert(sizeof(*frow) == sizeof(uint32_t)); + WebPUint32ToMem((uint8_t*)frow, _mm_cvtsi128_si32(out)); + frow += 1; + if (frow >= frow_end) break; + accum -= wrk->x_sub; + if (accum < 0) { + if (--left) { + cur_pixels = _mm_srli_si128(cur_pixels, 2); + } else if (src <= src_limit) { + LoadHeightPixels(src, &cur_pixels); + src += 7; + left = 7; + } else { // tail + cur_pixels = _mm_srli_si128(cur_pixels, 2); + cur_pixels = _mm_insert_epi16(cur_pixels, src[1], 1); + src += 1; + left = 1; + } + accum += x_add; + } + } + } + assert(accum == 0); +} + +static void RescalerImportRowShrinkSSE2(WebPRescaler* const wrk, + const uint8_t* src) { + const int x_sub = wrk->x_sub; + int accum = 0; + const __m128i zero = _mm_setzero_si128(); + const __m128i mult0 = _mm_set1_epi16(x_sub); + const __m128i mult1 = _mm_set1_epi32(wrk->fx_scale); + const __m128i rounder = _mm_set_epi32(0, ROUNDER, 0, ROUNDER); + __m128i sum = zero; + rescaler_t* frow = wrk->frow; + const rescaler_t* const frow_end = wrk->frow + 4 * wrk->dst_width; + + if (wrk->num_channels != 4 || wrk->x_add > (x_sub << 7)) { + WebPRescalerImportRowShrinkC(wrk, src); + return; + } + assert(!WebPRescalerInputDone(wrk)); + assert(!wrk->x_expand); + + for (; frow < frow_end; frow += 4) { + __m128i base = zero; + accum += wrk->x_add; + while (accum > 0) { + const __m128i A = _mm_cvtsi32_si128(WebPMemToUint32(src)); + src += 4; + base = _mm_unpacklo_epi8(A, zero); + // To avoid overflow, we need: base * x_add / x_sub < 32768 + // => x_add < x_sub << 7. That's a 1/128 reduction ratio limit. + sum = _mm_add_epi16(sum, base); + accum -= x_sub; + } + { // Emit next horizontal pixel. + const __m128i mult = _mm_set1_epi16(-accum); + const __m128i frac0 = _mm_mullo_epi16(base, mult); // 16b x 16b -> 32b + const __m128i frac1 = _mm_mulhi_epu16(base, mult); + const __m128i frac = _mm_unpacklo_epi16(frac0, frac1); // frac is 32b + const __m128i A0 = _mm_mullo_epi16(sum, mult0); + const __m128i A1 = _mm_mulhi_epu16(sum, mult0); + const __m128i B0 = _mm_unpacklo_epi16(A0, A1); // sum * x_sub + const __m128i frow_out = _mm_sub_epi32(B0, frac); // sum * x_sub - frac + const __m128i D0 = _mm_srli_epi64(frac, 32); + const __m128i D1 = _mm_mul_epu32(frac, mult1); // 32b x 16b -> 64b + const __m128i D2 = _mm_mul_epu32(D0, mult1); + const __m128i E1 = _mm_add_epi64(D1, rounder); + const __m128i E2 = _mm_add_epi64(D2, rounder); + const __m128i F1 = _mm_shuffle_epi32(E1, 1 | (3 << 2)); + const __m128i F2 = _mm_shuffle_epi32(E2, 1 | (3 << 2)); + const __m128i G = _mm_unpacklo_epi32(F1, F2); + sum = _mm_packs_epi32(G, zero); + _mm_storeu_si128((__m128i*)frow, frow_out); + } + } + assert(accum == 0); +} + +//------------------------------------------------------------------------------ +// Row export + +// load *src as epi64, multiply by mult and store result in [out0 ... out3] +static WEBP_INLINE void LoadDispatchAndMult(const rescaler_t* const src, + const __m128i* const mult, + __m128i* const out0, + __m128i* const out1, + __m128i* const out2, + __m128i* const out3) { + const __m128i A0 = _mm_loadu_si128((const __m128i*)(src + 0)); + const __m128i A1 = _mm_loadu_si128((const __m128i*)(src + 4)); + const __m128i A2 = _mm_srli_epi64(A0, 32); + const __m128i A3 = _mm_srli_epi64(A1, 32); + if (mult != NULL) { + *out0 = _mm_mul_epu32(A0, *mult); + *out1 = _mm_mul_epu32(A1, *mult); + *out2 = _mm_mul_epu32(A2, *mult); + *out3 = _mm_mul_epu32(A3, *mult); + } else { + *out0 = A0; + *out1 = A1; + *out2 = A2; + *out3 = A3; + } +} + +static WEBP_INLINE void ProcessRow(const __m128i* const A0, + const __m128i* const A1, + const __m128i* const A2, + const __m128i* const A3, + const __m128i* const mult, + uint8_t* const dst) { + const __m128i rounder = _mm_set_epi32(0, ROUNDER, 0, ROUNDER); + const __m128i mask = _mm_set_epi32(0xffffffffu, 0, 0xffffffffu, 0); + const __m128i B0 = _mm_mul_epu32(*A0, *mult); + const __m128i B1 = _mm_mul_epu32(*A1, *mult); + const __m128i B2 = _mm_mul_epu32(*A2, *mult); + const __m128i B3 = _mm_mul_epu32(*A3, *mult); + const __m128i C0 = _mm_add_epi64(B0, rounder); + const __m128i C1 = _mm_add_epi64(B1, rounder); + const __m128i C2 = _mm_add_epi64(B2, rounder); + const __m128i C3 = _mm_add_epi64(B3, rounder); + const __m128i D0 = _mm_srli_epi64(C0, WEBP_RESCALER_RFIX); + const __m128i D1 = _mm_srli_epi64(C1, WEBP_RESCALER_RFIX); +#if (WEBP_RESCALER_FIX < 32) + const __m128i D2 = + _mm_and_si128(_mm_slli_epi64(C2, 32 - WEBP_RESCALER_RFIX), mask); + const __m128i D3 = + _mm_and_si128(_mm_slli_epi64(C3, 32 - WEBP_RESCALER_RFIX), mask); +#else + const __m128i D2 = _mm_and_si128(C2, mask); + const __m128i D3 = _mm_and_si128(C3, mask); +#endif + const __m128i E0 = _mm_or_si128(D0, D2); + const __m128i E1 = _mm_or_si128(D1, D3); + const __m128i F = _mm_packs_epi32(E0, E1); + const __m128i G = _mm_packus_epi16(F, F); + _mm_storel_epi64((__m128i*)dst, G); +} + +static void RescalerExportRowExpandSSE2(WebPRescaler* const wrk) { + int x_out; + uint8_t* const dst = wrk->dst; + rescaler_t* const irow = wrk->irow; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const rescaler_t* const frow = wrk->frow; + const __m128i mult = _mm_set_epi32(0, wrk->fy_scale, 0, wrk->fy_scale); + + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0 && wrk->y_sub + wrk->y_accum >= 0); + assert(wrk->y_expand); + if (wrk->y_accum == 0) { + for (x_out = 0; x_out + 8 <= x_out_max; x_out += 8) { + __m128i A0, A1, A2, A3; + LoadDispatchAndMult(frow + x_out, NULL, &A0, &A1, &A2, &A3); + ProcessRow(&A0, &A1, &A2, &A3, &mult, dst + x_out); + } + for (; x_out < x_out_max; ++x_out) { + const uint32_t J = frow[x_out]; + const int v = (int)MULT_FIX(J, wrk->fy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + } + } else { + const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub); + const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B); + const __m128i mA = _mm_set_epi32(0, A, 0, A); + const __m128i mB = _mm_set_epi32(0, B, 0, B); + const __m128i rounder = _mm_set_epi32(0, ROUNDER, 0, ROUNDER); + for (x_out = 0; x_out + 8 <= x_out_max; x_out += 8) { + __m128i A0, A1, A2, A3, B0, B1, B2, B3; + LoadDispatchAndMult(frow + x_out, &mA, &A0, &A1, &A2, &A3); + LoadDispatchAndMult(irow + x_out, &mB, &B0, &B1, &B2, &B3); + { + const __m128i C0 = _mm_add_epi64(A0, B0); + const __m128i C1 = _mm_add_epi64(A1, B1); + const __m128i C2 = _mm_add_epi64(A2, B2); + const __m128i C3 = _mm_add_epi64(A3, B3); + const __m128i D0 = _mm_add_epi64(C0, rounder); + const __m128i D1 = _mm_add_epi64(C1, rounder); + const __m128i D2 = _mm_add_epi64(C2, rounder); + const __m128i D3 = _mm_add_epi64(C3, rounder); + const __m128i E0 = _mm_srli_epi64(D0, WEBP_RESCALER_RFIX); + const __m128i E1 = _mm_srli_epi64(D1, WEBP_RESCALER_RFIX); + const __m128i E2 = _mm_srli_epi64(D2, WEBP_RESCALER_RFIX); + const __m128i E3 = _mm_srli_epi64(D3, WEBP_RESCALER_RFIX); + ProcessRow(&E0, &E1, &E2, &E3, &mult, dst + x_out); + } + } + for (; x_out < x_out_max; ++x_out) { + const uint64_t I = (uint64_t)A * frow[x_out] + + (uint64_t)B * irow[x_out]; + const uint32_t J = (uint32_t)((I + ROUNDER) >> WEBP_RESCALER_RFIX); + const int v = (int)MULT_FIX(J, wrk->fy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + } + } +} + +static void RescalerExportRowShrinkSSE2(WebPRescaler* const wrk) { + int x_out; + uint8_t* const dst = wrk->dst; + rescaler_t* const irow = wrk->irow; + const int x_out_max = wrk->dst_width * wrk->num_channels; + const rescaler_t* const frow = wrk->frow; + const uint32_t yscale = wrk->fy_scale * (-wrk->y_accum); + assert(!WebPRescalerOutputDone(wrk)); + assert(wrk->y_accum <= 0); + assert(!wrk->y_expand); + if (yscale) { + const int scale_xy = wrk->fxy_scale; + const __m128i mult_xy = _mm_set_epi32(0, scale_xy, 0, scale_xy); + const __m128i mult_y = _mm_set_epi32(0, yscale, 0, yscale); + const __m128i rounder = _mm_set_epi32(0, ROUNDER, 0, ROUNDER); + for (x_out = 0; x_out + 8 <= x_out_max; x_out += 8) { + __m128i A0, A1, A2, A3, B0, B1, B2, B3; + LoadDispatchAndMult(irow + x_out, NULL, &A0, &A1, &A2, &A3); + LoadDispatchAndMult(frow + x_out, &mult_y, &B0, &B1, &B2, &B3); + { + const __m128i C0 = _mm_add_epi64(B0, rounder); + const __m128i C1 = _mm_add_epi64(B1, rounder); + const __m128i C2 = _mm_add_epi64(B2, rounder); + const __m128i C3 = _mm_add_epi64(B3, rounder); + const __m128i D0 = _mm_srli_epi64(C0, WEBP_RESCALER_RFIX); // = frac + const __m128i D1 = _mm_srli_epi64(C1, WEBP_RESCALER_RFIX); + const __m128i D2 = _mm_srli_epi64(C2, WEBP_RESCALER_RFIX); + const __m128i D3 = _mm_srli_epi64(C3, WEBP_RESCALER_RFIX); + const __m128i E0 = _mm_sub_epi64(A0, D0); // irow[x] - frac + const __m128i E1 = _mm_sub_epi64(A1, D1); + const __m128i E2 = _mm_sub_epi64(A2, D2); + const __m128i E3 = _mm_sub_epi64(A3, D3); + const __m128i F2 = _mm_slli_epi64(D2, 32); + const __m128i F3 = _mm_slli_epi64(D3, 32); + const __m128i G0 = _mm_or_si128(D0, F2); + const __m128i G1 = _mm_or_si128(D1, F3); + _mm_storeu_si128((__m128i*)(irow + x_out + 0), G0); + _mm_storeu_si128((__m128i*)(irow + x_out + 4), G1); + ProcessRow(&E0, &E1, &E2, &E3, &mult_xy, dst + x_out); + } + } + for (; x_out < x_out_max; ++x_out) { + const uint32_t frac = (int)MULT_FIX(frow[x_out], yscale); + const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + irow[x_out] = frac; // new fractional start + } + } else { + const uint32_t scale = wrk->fxy_scale; + const __m128i mult = _mm_set_epi32(0, scale, 0, scale); + const __m128i zero = _mm_setzero_si128(); + for (x_out = 0; x_out + 8 <= x_out_max; x_out += 8) { + __m128i A0, A1, A2, A3; + LoadDispatchAndMult(irow + x_out, NULL, &A0, &A1, &A2, &A3); + _mm_storeu_si128((__m128i*)(irow + x_out + 0), zero); + _mm_storeu_si128((__m128i*)(irow + x_out + 4), zero); + ProcessRow(&A0, &A1, &A2, &A3, &mult, dst + x_out); + } + for (; x_out < x_out_max; ++x_out) { + const int v = (int)MULT_FIX(irow[x_out], scale); + assert(v >= 0 && v <= 255); + dst[x_out] = v; + irow[x_out] = 0; + } + } +} + +#undef MULT_FIX +#undef ROUNDER + +//------------------------------------------------------------------------------ + +extern void WebPRescalerDspInitSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitSSE2(void) { + WebPRescalerImportRowExpand = RescalerImportRowExpandSSE2; + WebPRescalerImportRowShrink = RescalerImportRowShrinkSSE2; + WebPRescalerExportRowExpand = RescalerExportRowExpandSSE2; + WebPRescalerExportRowShrink = RescalerExportRowShrinkSSE2; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(WebPRescalerDspInitSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/thirdparty/libwebp/dsp/upsampling.c b/thirdparty/libwebp/dsp/upsampling.c new file mode 100644 index 0000000000..651274fcee --- /dev/null +++ b/thirdparty/libwebp/dsp/upsampling.c @@ -0,0 +1,260 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: somnath@google.com (Somnath Banerjee) + +#include "./dsp.h" +#include "./yuv.h" + +#include <assert.h> + +//------------------------------------------------------------------------------ +// 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 */ \ + 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 != NULL) { \ + 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; \ + { \ + 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 != 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), \ + 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)) { \ + { \ + 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 != 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); \ + } \ + } \ +} + +// 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 + +//------------------------------------------------------------------------------ + +#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; \ + 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); \ + } \ + 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) \ +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(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 + +WebPYUV444Converter WebPYUV444Converters[MODE_LAST]; + +extern void WebPInitYUV444ConvertersMIPSdspR2(void); +extern void WebPInitYUV444ConvertersSSE2(void); + +static volatile VP8CPUInfo upsampling_last_cpuinfo_used1 = + (VP8CPUInfo)&upsampling_last_cpuinfo_used1; + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitYUV444Converters(void) { + if (upsampling_last_cpuinfo_used1 == VP8GetCPUInfo) return; + + 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; + + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_USE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitYUV444ConvertersSSE2(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + WebPInitYUV444ConvertersMIPSdspR2(); + } +#endif + } + upsampling_last_cpuinfo_used1 = VP8GetCPUInfo; +} + +//------------------------------------------------------------------------------ +// 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; + +#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; + 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)) { + 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; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/dsp/upsampling_mips_dsp_r2.c b/thirdparty/libwebp/dsp/upsampling_mips_dsp_r2.c new file mode 100644 index 0000000000..ed2eb74825 --- /dev/null +++ b/thirdparty/libwebp/dsp/upsampling_mips_dsp_r2.c @@ -0,0 +1,282 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// +// Author(s): Branimir Vasic (branimir.vasic@imgtec.com) +// Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include <assert.h> +#include "./yuv.h" + +#if !defined(WEBP_YUV_USE_TABLE) + +#define YUV_TO_RGB(Y, U, V, R, G, B) do { \ + const int t1 = MultHi(Y, 19077); \ + const int t2 = MultHi(V, 13320); \ + R = MultHi(V, 26149); \ + G = MultHi(U, 6419); \ + B = MultHi(U, 33050); \ + R = t1 + R; \ + G = t1 - G; \ + B = t1 + B; \ + R = R - 14234; \ + G = G - t2 + 8708; \ + B = B - 17685; \ + __asm__ volatile ( \ + "shll_s.w %[" #R "], %[" #R "], 17 \n\t" \ + "shll_s.w %[" #G "], %[" #G "], 17 \n\t" \ + "shll_s.w %[" #B "], %[" #B "], 17 \n\t" \ + "precrqu_s.qb.ph %[" #R "], %[" #R "], $zero \n\t" \ + "precrqu_s.qb.ph %[" #G "], %[" #G "], $zero \n\t" \ + "precrqu_s.qb.ph %[" #B "], %[" #B "], $zero \n\t" \ + "srl %[" #R "], %[" #R "], 24 \n\t" \ + "srl %[" #G "], %[" #G "], 24 \n\t" \ + "srl %[" #B "], %[" #B "], 24 \n\t" \ + : [R]"+r"(R), [G]"+r"(G), [B]"+r"(B) \ + : \ + ); \ + } while (0) + +static WEBP_INLINE void YuvToRgb(int y, int u, int v, uint8_t* const rgb) { + int r, g, b; + YUV_TO_RGB(y, u, v, r, g, b); + rgb[0] = r; + rgb[1] = g; + rgb[2] = b; +} +static WEBP_INLINE void YuvToBgr(int y, int u, int v, uint8_t* const bgr) { + int r, g, b; + YUV_TO_RGB(y, u, v, r, g, b); + bgr[0] = b; + bgr[1] = g; + bgr[2] = r; +} +static WEBP_INLINE void YuvToRgb565(int y, int u, int v, uint8_t* const rgb) { + int r, g, b; + YUV_TO_RGB(y, u, v, r, g, b); + { + 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 YuvToRgba4444(int y, int u, int v, + uint8_t* const argb) { + int r, g, b; + YUV_TO_RGB(y, u, v, r, g, b); + { + 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 + } +} +#endif // WEBP_YUV_USE_TABLE + +//----------------------------------------------------------------------------- +// Alpha handling variants + +static WEBP_INLINE void YuvToArgb(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const argb) { + int r, g, b; + YUV_TO_RGB(y, u, v, r, g, b); + argb[0] = 0xff; + argb[1] = r; + argb[2] = g; + argb[3] = b; +} +static WEBP_INLINE void YuvToBgra(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const bgra) { + int r, g, b; + YUV_TO_RGB(y, u, v, r, g, b); + bgra[0] = b; + bgra[1] = g; + bgra[2] = r; + bgra[3] = 0xff; +} +static WEBP_INLINE void YuvToRgba(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const rgba) { + int r, g, b; + YUV_TO_RGB(y, u, v, r, g, b); + rgba[0] = r; + rgba[1] = g; + rgba[2] = b; + rgba[3] = 0xff; +} + +//------------------------------------------------------------------------------ +// Fancy upsampler + +#ifdef FANCY_UPSAMPLING + +// 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 */ \ + 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 != NULL) { \ + 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; \ + { \ + 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 != 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), \ + 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)) { \ + { \ + 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 != 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); \ + } \ + } \ +} + +// All variants implemented. +UPSAMPLE_FUNC(UpsampleRgbLinePair, YuvToRgb, 3) +UPSAMPLE_FUNC(UpsampleBgrLinePair, YuvToBgr, 3) +UPSAMPLE_FUNC(UpsampleRgbaLinePair, YuvToRgba, 4) +UPSAMPLE_FUNC(UpsampleBgraLinePair, YuvToBgra, 4) +UPSAMPLE_FUNC(UpsampleArgbLinePair, YuvToArgb, 4) +UPSAMPLE_FUNC(UpsampleRgba4444LinePair, YuvToRgba4444, 2) +UPSAMPLE_FUNC(UpsampleRgb565LinePair, YuvToRgb565, 2) + +#undef LOAD_UV +#undef UPSAMPLE_FUNC + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPInitUpsamplersMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplersMIPSdspR2(void) { + 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; + WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; + WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair; + WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair; +} + +#endif // FANCY_UPSAMPLING + +//------------------------------------------------------------------------------ +// 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, YuvToRgb, 3) +YUV444_FUNC(Yuv444ToBgr, YuvToBgr, 3) +YUV444_FUNC(Yuv444ToRgba, YuvToRgba, 4) +YUV444_FUNC(Yuv444ToBgra, YuvToBgra, 4) +YUV444_FUNC(Yuv444ToArgb, YuvToArgb, 4) +YUV444_FUNC(Yuv444ToRgba4444, YuvToRgba4444, 2) +YUV444_FUNC(Yuv444ToRgb565, YuvToRgb565, 2) + +#undef YUV444_FUNC + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPInitYUV444ConvertersMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitYUV444ConvertersMIPSdspR2(void) { + WebPYUV444Converters[MODE_RGB] = Yuv444ToRgb; + WebPYUV444Converters[MODE_RGBA] = Yuv444ToRgba; + WebPYUV444Converters[MODE_BGR] = Yuv444ToBgr; + WebPYUV444Converters[MODE_BGRA] = Yuv444ToBgra; + WebPYUV444Converters[MODE_ARGB] = Yuv444ToArgb; + WebPYUV444Converters[MODE_RGBA_4444] = Yuv444ToRgba4444; + WebPYUV444Converters[MODE_RGB_565] = Yuv444ToRgb565; + WebPYUV444Converters[MODE_rgbA] = Yuv444ToRgba; + WebPYUV444Converters[MODE_bgrA] = Yuv444ToBgra; + WebPYUV444Converters[MODE_Argb] = Yuv444ToArgb; + WebPYUV444Converters[MODE_rgbA_4444] = Yuv444ToRgba4444; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(WebPInitYUV444ConvertersMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 + +#if !(defined(FANCY_UPSAMPLING) && defined(WEBP_USE_MIPS_DSP_R2)) +WEBP_DSP_INIT_STUB(WebPInitUpsamplersMIPSdspR2) +#endif diff --git a/thirdparty/libwebp/dsp/upsampling_neon.c b/thirdparty/libwebp/dsp/upsampling_neon.c new file mode 100644 index 0000000000..2b0c99bddb --- /dev/null +++ b/thirdparty/libwebp/dsp/upsampling_neon.c @@ -0,0 +1,300 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// NEON version of YUV to RGB upsampling functions. +// +// Author: mans@mansr.com (Mans Rullgard) +// Based on SSE code by: somnath@google.com (Somnath Banerjee) + +#include "./dsp.h" + +#if defined(WEBP_USE_NEON) + +#include <assert.h> +#include <arm_neon.h> +#include <string.h> +#include "./neon.h" +#include "./yuv.h" + +#ifdef FANCY_UPSAMPLING + +//----------------------------------------------------------------------------- +// U/V upsampling + +// Loads 9 pixels each from rows r1 and r2 and generates 16 pixels. +#define UPSAMPLE_16PIXELS(r1, r2, out) { \ + uint8x8_t a = vld1_u8(r1); \ + uint8x8_t b = vld1_u8(r1 + 1); \ + uint8x8_t c = vld1_u8(r2); \ + uint8x8_t d = vld1_u8(r2 + 1); \ + \ + uint16x8_t al = vshll_n_u8(a, 1); \ + uint16x8_t bl = vshll_n_u8(b, 1); \ + uint16x8_t cl = vshll_n_u8(c, 1); \ + uint16x8_t dl = vshll_n_u8(d, 1); \ + \ + uint8x8_t diag1, diag2; \ + uint16x8_t sl; \ + \ + /* a + b + c + d */ \ + sl = vaddl_u8(a, b); \ + sl = vaddw_u8(sl, c); \ + sl = vaddw_u8(sl, d); \ + \ + al = vaddq_u16(sl, al); /* 3a + b + c + d */ \ + bl = vaddq_u16(sl, bl); /* a + 3b + c + d */ \ + \ + al = vaddq_u16(al, dl); /* 3a + b + c + 3d */ \ + bl = vaddq_u16(bl, cl); /* a + 3b + 3c + d */ \ + \ + diag2 = vshrn_n_u16(al, 3); \ + diag1 = vshrn_n_u16(bl, 3); \ + \ + a = vrhadd_u8(a, diag1); \ + b = vrhadd_u8(b, diag2); \ + c = vrhadd_u8(c, diag2); \ + d = vrhadd_u8(d, diag1); \ + \ + { \ + uint8x8x2_t a_b, c_d; \ + INIT_VECTOR2(a_b, a, b); \ + INIT_VECTOR2(c_d, c, d); \ + vst2_u8(out, a_b); \ + vst2_u8(out + 32, c_d); \ + } \ +} + +// Turn the macro into a function for reducing code-size when non-critical +static void Upsample16Pixels(const uint8_t *r1, const uint8_t *r2, + uint8_t *out) { + UPSAMPLE_16PIXELS(r1, r2, out); +} + +#define UPSAMPLE_LAST_BLOCK(tb, bb, num_pixels, out) { \ + uint8_t r1[9], r2[9]; \ + memcpy(r1, (tb), (num_pixels)); \ + memcpy(r2, (bb), (num_pixels)); \ + /* replicate last byte */ \ + memset(r1 + (num_pixels), r1[(num_pixels) - 1], 9 - (num_pixels)); \ + memset(r2 + (num_pixels), r2[(num_pixels) - 1], 9 - (num_pixels)); \ + Upsample16Pixels(r1, r2, out); \ +} + +//----------------------------------------------------------------------------- +// YUV->RGB conversion + +// note: we represent the 33050 large constant as 32768 + 282 +static const int16_t kCoeffs1[4] = { 19077, 26149, 6419, 13320 }; + +#define v255 vdup_n_u8(255) +#define v_0x0f vdup_n_u8(15) + +#define STORE_Rgb(out, r, g, b) do { \ + uint8x8x3_t r_g_b; \ + INIT_VECTOR3(r_g_b, r, g, b); \ + vst3_u8(out, r_g_b); \ +} while (0) + +#define STORE_Bgr(out, r, g, b) do { \ + uint8x8x3_t b_g_r; \ + INIT_VECTOR3(b_g_r, b, g, r); \ + vst3_u8(out, b_g_r); \ +} while (0) + +#define STORE_Rgba(out, r, g, b) do { \ + uint8x8x4_t r_g_b_v255; \ + INIT_VECTOR4(r_g_b_v255, r, g, b, v255); \ + vst4_u8(out, r_g_b_v255); \ +} while (0) + +#define STORE_Bgra(out, r, g, b) do { \ + uint8x8x4_t b_g_r_v255; \ + INIT_VECTOR4(b_g_r_v255, b, g, r, v255); \ + vst4_u8(out, b_g_r_v255); \ +} while (0) + +#define STORE_Argb(out, r, g, b) do { \ + uint8x8x4_t v255_r_g_b; \ + INIT_VECTOR4(v255_r_g_b, v255, r, g, b); \ + vst4_u8(out, v255_r_g_b); \ +} while (0) + +#if !defined(WEBP_SWAP_16BIT_CSP) +#define ZIP_U8(lo, hi) vzip_u8((lo), (hi)) +#else +#define ZIP_U8(lo, hi) vzip_u8((hi), (lo)) +#endif + +#define STORE_Rgba4444(out, r, g, b) do { \ + const uint8x8_t r1 = vshl_n_u8(vshr_n_u8(r, 4), 4); /* 4bits */ \ + const uint8x8_t g1 = vshr_n_u8(g, 4); \ + const uint8x8_t ba = vorr_u8(b, v_0x0f); \ + const uint8x8_t rg = vorr_u8(r1, g1); \ + const uint8x8x2_t rgba4444 = ZIP_U8(rg, ba); \ + vst1q_u8(out, vcombine_u8(rgba4444.val[0], rgba4444.val[1])); \ +} while (0) + +#define STORE_Rgb565(out, r, g, b) do { \ + const uint8x8_t r1 = vshl_n_u8(vshr_n_u8(r, 3), 3); /* 5bits */ \ + const uint8x8_t g1 = vshr_n_u8(g, 5); /* upper 3bits */\ + const uint8x8_t g2 = vshl_n_u8(vshr_n_u8(g, 2), 5); /* lower 3bits */\ + const uint8x8_t b1 = vshr_n_u8(b, 3); /* 5bits */ \ + const uint8x8_t rg = vorr_u8(r1, g1); \ + const uint8x8_t gb = vorr_u8(g2, b1); \ + const uint8x8x2_t rgb565 = ZIP_U8(rg, gb); \ + vst1q_u8(out, vcombine_u8(rgb565.val[0], rgb565.val[1])); \ +} while (0) + +#define CONVERT8(FMT, XSTEP, N, src_y, src_uv, out, cur_x) do { \ + int i; \ + for (i = 0; i < N; i += 8) { \ + const int off = ((cur_x) + i) * XSTEP; \ + const uint8x8_t y = vld1_u8((src_y) + (cur_x) + i); \ + const uint8x8_t u = vld1_u8((src_uv) + i + 0); \ + const uint8x8_t v = vld1_u8((src_uv) + i + 16); \ + const int16x8_t Y0 = vreinterpretq_s16_u16(vshll_n_u8(y, 7)); \ + const int16x8_t U0 = vreinterpretq_s16_u16(vshll_n_u8(u, 7)); \ + const int16x8_t V0 = vreinterpretq_s16_u16(vshll_n_u8(v, 7)); \ + const int16x8_t Y1 = vqdmulhq_lane_s16(Y0, coeff1, 0); \ + const int16x8_t R0 = vqdmulhq_lane_s16(V0, coeff1, 1); \ + const int16x8_t G0 = vqdmulhq_lane_s16(U0, coeff1, 2); \ + const int16x8_t G1 = vqdmulhq_lane_s16(V0, coeff1, 3); \ + const int16x8_t B0 = vqdmulhq_n_s16(U0, 282); \ + const int16x8_t R1 = vqaddq_s16(Y1, R_Rounder); \ + const int16x8_t G2 = vqaddq_s16(Y1, G_Rounder); \ + const int16x8_t B1 = vqaddq_s16(Y1, B_Rounder); \ + const int16x8_t R2 = vqaddq_s16(R0, R1); \ + const int16x8_t G3 = vqaddq_s16(G0, G1); \ + const int16x8_t B2 = vqaddq_s16(B0, B1); \ + const int16x8_t G4 = vqsubq_s16(G2, G3); \ + const int16x8_t B3 = vqaddq_s16(B2, U0); \ + const uint8x8_t R = vqshrun_n_s16(R2, YUV_FIX2); \ + const uint8x8_t G = vqshrun_n_s16(G4, YUV_FIX2); \ + const uint8x8_t B = vqshrun_n_s16(B3, YUV_FIX2); \ + STORE_ ## FMT(out + off, R, G, B); \ + } \ +} while (0) + +#define CONVERT1(FUNC, XSTEP, N, src_y, src_uv, rgb, cur_x) { \ + int i; \ + for (i = 0; i < N; i++) { \ + const int off = ((cur_x) + i) * XSTEP; \ + const int y = src_y[(cur_x) + i]; \ + const int u = (src_uv)[i]; \ + const int v = (src_uv)[i + 16]; \ + FUNC(y, u, v, rgb + off); \ + } \ +} + +#define CONVERT2RGB_8(FMT, XSTEP, top_y, bottom_y, uv, \ + top_dst, bottom_dst, cur_x, len) { \ + CONVERT8(FMT, XSTEP, len, top_y, uv, top_dst, cur_x); \ + if (bottom_y != NULL) { \ + CONVERT8(FMT, XSTEP, len, bottom_y, (uv) + 32, bottom_dst, cur_x); \ + } \ +} + +#define CONVERT2RGB_1(FUNC, XSTEP, top_y, bottom_y, uv, \ + top_dst, bottom_dst, cur_x, len) { \ + CONVERT1(FUNC, XSTEP, len, top_y, uv, top_dst, cur_x); \ + if (bottom_y != NULL) { \ + CONVERT1(FUNC, XSTEP, len, bottom_y, (uv) + 32, bottom_dst, cur_x); \ + } \ +} + +#define NEON_UPSAMPLE_FUNC(FUNC_NAME, FMT, 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 block; \ + /* 16 byte aligned array to cache reconstructed u and v */ \ + uint8_t uv_buf[2 * 32 + 15]; \ + uint8_t *const r_uv = (uint8_t*)((uintptr_t)(uv_buf + 15) & ~15); \ + const int uv_len = (len + 1) >> 1; \ + /* 9 pixels must be read-able for each block */ \ + const int num_blocks = (uv_len - 1) >> 3; \ + const int leftover = uv_len - num_blocks * 8; \ + const int last_pos = 1 + 16 * 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; \ + \ + const int16x4_t coeff1 = vld1_s16(kCoeffs1); \ + const int16x8_t R_Rounder = vdupq_n_s16(-14234); \ + const int16x8_t G_Rounder = vdupq_n_s16(8708); \ + const int16x8_t B_Rounder = vdupq_n_s16(-17685); \ + \ + /* Treat the first pixel in regular way */ \ + assert(top_y != NULL); \ + { \ + const int u0 = (top_u[0] + u_diag) >> 1; \ + const int v0 = (top_v[0] + v_diag) >> 1; \ + VP8YuvTo ## FMT(top_y[0], u0, v0, top_dst); \ + } \ + if (bottom_y != NULL) { \ + const int u0 = (cur_u[0] + u_diag) >> 1; \ + const int v0 = (cur_v[0] + v_diag) >> 1; \ + VP8YuvTo ## FMT(bottom_y[0], u0, v0, bottom_dst); \ + } \ + \ + for (block = 0; block < num_blocks; ++block) { \ + UPSAMPLE_16PIXELS(top_u, cur_u, r_uv); \ + UPSAMPLE_16PIXELS(top_v, cur_v, r_uv + 16); \ + CONVERT2RGB_8(FMT, XSTEP, top_y, bottom_y, r_uv, \ + top_dst, bottom_dst, 16 * block + 1, 16); \ + top_u += 8; \ + cur_u += 8; \ + top_v += 8; \ + cur_v += 8; \ + } \ + \ + UPSAMPLE_LAST_BLOCK(top_u, cur_u, leftover, r_uv); \ + UPSAMPLE_LAST_BLOCK(top_v, cur_v, leftover, r_uv + 16); \ + CONVERT2RGB_1(VP8YuvTo ## FMT, XSTEP, top_y, bottom_y, r_uv, \ + top_dst, bottom_dst, last_pos, len - last_pos); \ +} + +// NEON variants of the fancy upsampler. +NEON_UPSAMPLE_FUNC(UpsampleRgbLinePair, Rgb, 3) +NEON_UPSAMPLE_FUNC(UpsampleBgrLinePair, Bgr, 3) +NEON_UPSAMPLE_FUNC(UpsampleRgbaLinePair, Rgba, 4) +NEON_UPSAMPLE_FUNC(UpsampleBgraLinePair, Bgra, 4) +NEON_UPSAMPLE_FUNC(UpsampleArgbLinePair, Argb, 4) +NEON_UPSAMPLE_FUNC(UpsampleRgba4444LinePair, Rgba4444, 2) +NEON_UPSAMPLE_FUNC(UpsampleRgb565LinePair, Rgb565, 2) + +//------------------------------------------------------------------------------ +// Entry point + +extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; + +extern void WebPInitUpsamplersNEON(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplersNEON(void) { + WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair; + WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair; + WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair; + WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair; + WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; + WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair; + WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair; + WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair; + WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair; +} + +#endif // FANCY_UPSAMPLING + +#endif // WEBP_USE_NEON + +#if !(defined(FANCY_UPSAMPLING) && defined(WEBP_USE_NEON)) +WEBP_DSP_INIT_STUB(WebPInitUpsamplersNEON) +#endif diff --git a/thirdparty/libwebp/dsp/upsampling_sse2.c b/thirdparty/libwebp/dsp/upsampling_sse2.c new file mode 100644 index 0000000000..b5b668900f --- /dev/null +++ b/thirdparty/libwebp/dsp/upsampling_sse2.c @@ -0,0 +1,249 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// 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" + +#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 alternating pixel rows +#define PACK_AND_STORE(a, b, da, db, out) do { \ + 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((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 */ \ + 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); /* 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 +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, \ + top_dst, bottom_dst, cur_x, num_pixels) { \ + int n; \ + 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 != NULL) { \ + for (n = 0; n < (num_pixels); ++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 uv_pos, pos; \ + /* 16byte-aligned array to cache reconstructed u and v */ \ + uint8_t uv_buf[4 * 32 + 15]; \ + uint8_t* const r_u = (uint8_t*)((uintptr_t)(uv_buf + 15) & ~15); \ + uint8_t* const r_v = r_u + 32; \ + \ + 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); \ + } \ + } \ + /* 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); \ + } \ + 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); \ + } \ +} + +// SSE2 variants of the fancy upsampler. +SSE2_UPSAMPLE_FUNC(UpsampleRgbLinePair, VP8YuvToRgb, 3) +SSE2_UPSAMPLE_FUNC(UpsampleBgrLinePair, VP8YuvToBgr, 3) +SSE2_UPSAMPLE_FUNC(UpsampleRgbaLinePair, VP8YuvToRgba, 4) +SSE2_UPSAMPLE_FUNC(UpsampleBgraLinePair, VP8YuvToBgra, 4) +SSE2_UPSAMPLE_FUNC(UpsampleArgbLinePair, VP8YuvToArgb, 4) +SSE2_UPSAMPLE_FUNC(UpsampleRgba4444LinePair, VP8YuvToRgba4444, 2) +SSE2_UPSAMPLE_FUNC(UpsampleRgb565LinePair, VP8YuvToRgb565, 2) + +#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 */]; + +extern void WebPInitUpsamplersSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplersSSE2(void) { + WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair; + WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair; + WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair; + WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair; + WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; + WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; + WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair; + WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair; + WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair; + WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair; +} + +#endif // FANCY_UPSAMPLING + +//------------------------------------------------------------------------------ + +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); \ + } \ +} + +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) { + 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/thirdparty/libwebp/dsp/yuv.c b/thirdparty/libwebp/dsp/yuv.c new file mode 100644 index 0000000000..f50a253168 --- /dev/null +++ b/thirdparty/libwebp/dsp/yuv.c @@ -0,0 +1,280 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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 functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./yuv.h" + +#if defined(WEBP_YUV_USE_TABLE) + +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; +} + +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; + 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); + } +#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; +} + +#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/thirdparty/libwebp/dsp/yuv.h b/thirdparty/libwebp/dsp/yuv.h new file mode 100644 index 0000000000..01c40fcb84 --- /dev/null +++ b/thirdparty/libwebp/dsp/yuv.h @@ -0,0 +1,238 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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. +// +// The fixed-point implementation used here is: +// R = (19077 . y + 26149 . v - 14234) >> 6 +// G = (19077 . y - 6419 . u - 13320 . v + 8708) >> 6 +// B = (19077 . y + 33050 . u - 17685) >> 6 +// where the '.' operator is the mulhi_epu16 variant: +// a . b = ((a << 8) * b) >> 16 +// that preserves 8 bits of fractional precision before final descaling. + +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_DSP_YUV_H_ +#define WEBP_DSP_YUV_H_ + +#include "./dsp.h" +#include "../dec/decode_vp8.h" + +#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 + +#ifdef __cplusplus +extern "C" { +#endif + +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 = 6, // fixed-point precision for YUV->RGB + YUV_HALF2 = 1 << YUV_FIX2 >> 1, + YUV_MASK2 = (256 << YUV_FIX2) - 1 +}; + +//------------------------------------------------------------------------------ +// slower on x86 by ~7-8%, but bit-exact with the SSE2/NEON version + +static WEBP_INLINE int MultHi(int v, int coeff) { // _mm_mulhi_epu16 emulation + return (v * coeff) >> 8; +} + +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(MultHi(y, 19077) + MultHi(v, 26149) - 14234); +} + +static WEBP_INLINE int VP8YUVToG(int y, int u, int v) { + return VP8Clip8(MultHi(y, 19077) - MultHi(u, 6419) - MultHi(v, 13320) + 8708); +} + +static WEBP_INLINE int VP8YUVToB(int y, int u) { + return VP8Clip8(MultHi(y, 19077) + MultHi(u, 33050) - 17685); +} + +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 +} + +//----------------------------------------------------------------------------- +// 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, + 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); + +//----------------------------------------------------------------------------- +// SSE2 extra functions (mostly for upsampling_sse2.c) + +#if defined(WEBP_USE_SSE2) + +// Process 32 pixels and store the result (16b, 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); +void VP8YuvToArgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst); +void VP8YuvToRgba444432(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst); +void VP8YuvToRgb56532(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst); + +#endif // WEBP_USE_SSE2 + +//------------------------------------------------------------------------------ +// RGB -> YUV conversion + +// 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; +} + +#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 + rounding + (16 << YUV_FIX)) >> YUV_FIX; // no need to clip +} + +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, 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 +} + +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 + +#endif /* WEBP_DSP_YUV_H_ */ diff --git a/thirdparty/libwebp/dsp/yuv_mips32.c b/thirdparty/libwebp/dsp/yuv_mips32.c new file mode 100644 index 0000000000..e61aac571f --- /dev/null +++ b/thirdparty/libwebp/dsp/yuv_mips32.c @@ -0,0 +1,103 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS version of YUV to RGB upsampling functions. +// +// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) +// Jovan Zelincevic (jovan.zelincevic@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS32) + +#include "./yuv.h" + +//------------------------------------------------------------------------------ +// simple point-sampling + +#define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A) \ +static void FUNC_NAME(const uint8_t* y, \ + const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len) { \ + int i, r, g, b; \ + int temp0, temp1, temp2, temp3, temp4; \ + for (i = 0; i < (len >> 1); i++) { \ + temp1 = MultHi(v[0], 26149); \ + temp3 = MultHi(v[0], 13320); \ + temp2 = MultHi(u[0], 6419); \ + temp4 = MultHi(u[0], 33050); \ + temp0 = MultHi(y[0], 19077); \ + temp1 -= 14234; \ + temp3 -= 8708; \ + temp2 += temp3; \ + temp4 -= 17685; \ + r = VP8Clip8(temp0 + temp1); \ + g = VP8Clip8(temp0 - temp2); \ + b = VP8Clip8(temp0 + temp4); \ + temp0 = MultHi(y[1], 19077); \ + dst[R] = r; \ + dst[G] = g; \ + dst[B] = b; \ + if (A) dst[A] = 0xff; \ + r = VP8Clip8(temp0 + temp1); \ + g = VP8Clip8(temp0 - temp2); \ + b = VP8Clip8(temp0 + temp4); \ + dst[R + XSTEP] = r; \ + dst[G + XSTEP] = g; \ + dst[B + XSTEP] = b; \ + if (A) dst[A + XSTEP] = 0xff; \ + y += 2; \ + ++u; \ + ++v; \ + dst += 2 * XSTEP; \ + } \ + if (len & 1) { \ + temp1 = MultHi(v[0], 26149); \ + temp3 = MultHi(v[0], 13320); \ + temp2 = MultHi(u[0], 6419); \ + temp4 = MultHi(u[0], 33050); \ + temp0 = MultHi(y[0], 19077); \ + temp1 -= 14234; \ + temp3 -= 8708; \ + temp2 += temp3; \ + temp4 -= 17685; \ + r = VP8Clip8(temp0 + temp1); \ + g = VP8Clip8(temp0 - temp2); \ + b = VP8Clip8(temp0 + temp4); \ + dst[R] = r; \ + dst[G] = g; \ + dst[B] = b; \ + if (A) dst[A] = 0xff; \ + } \ +} + +ROW_FUNC(YuvToRgbRow, 3, 0, 1, 2, 0) +ROW_FUNC(YuvToRgbaRow, 4, 0, 1, 2, 3) +ROW_FUNC(YuvToBgrRow, 3, 2, 1, 0, 0) +ROW_FUNC(YuvToBgraRow, 4, 2, 1, 0, 3) + +#undef ROW_FUNC + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPInitSamplersMIPS32(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPS32(void) { + WebPSamplers[MODE_RGB] = YuvToRgbRow; + WebPSamplers[MODE_RGBA] = YuvToRgbaRow; + WebPSamplers[MODE_BGR] = YuvToBgrRow; + WebPSamplers[MODE_BGRA] = YuvToBgraRow; +} + +#else // !WEBP_USE_MIPS32 + +WEBP_DSP_INIT_STUB(WebPInitSamplersMIPS32) + +#endif // WEBP_USE_MIPS32 diff --git a/thirdparty/libwebp/dsp/yuv_mips_dsp_r2.c b/thirdparty/libwebp/dsp/yuv_mips_dsp_r2.c new file mode 100644 index 0000000000..1720d4190f --- /dev/null +++ b/thirdparty/libwebp/dsp/yuv_mips_dsp_r2.c @@ -0,0 +1,134 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// MIPS DSPr2 version of YUV to RGB upsampling functions. +// +// Author(s): Branimir Vasic (branimir.vasic@imgtec.com) +// Djordje Pesut (djordje.pesut@imgtec.com) + +#include "./dsp.h" + +#if defined(WEBP_USE_MIPS_DSP_R2) + +#include "./yuv.h" + +//------------------------------------------------------------------------------ +// simple point-sampling + +#define ROW_FUNC_PART_1() \ + "lbu %[temp3], 0(%[v]) \n\t" \ + "lbu %[temp4], 0(%[u]) \n\t" \ + "lbu %[temp0], 0(%[y]) \n\t" \ + "mul %[temp1], %[t_con_1], %[temp3] \n\t" \ + "mul %[temp3], %[t_con_2], %[temp3] \n\t" \ + "mul %[temp2], %[t_con_3], %[temp4] \n\t" \ + "mul %[temp4], %[t_con_4], %[temp4] \n\t" \ + "mul %[temp0], %[t_con_5], %[temp0] \n\t" \ + "subu %[temp1], %[temp1], %[t_con_6] \n\t" \ + "subu %[temp3], %[temp3], %[t_con_7] \n\t" \ + "addu %[temp2], %[temp2], %[temp3] \n\t" \ + "subu %[temp4], %[temp4], %[t_con_8] \n\t" \ + +#define ROW_FUNC_PART_2(R, G, B, K) \ + "addu %[temp5], %[temp0], %[temp1] \n\t" \ + "subu %[temp6], %[temp0], %[temp2] \n\t" \ + "addu %[temp7], %[temp0], %[temp4] \n\t" \ +".if " #K " \n\t" \ + "lbu %[temp0], 1(%[y]) \n\t" \ +".endif \n\t" \ + "shll_s.w %[temp5], %[temp5], 17 \n\t" \ + "shll_s.w %[temp6], %[temp6], 17 \n\t" \ +".if " #K " \n\t" \ + "mul %[temp0], %[t_con_5], %[temp0] \n\t" \ +".endif \n\t" \ + "shll_s.w %[temp7], %[temp7], 17 \n\t" \ + "precrqu_s.qb.ph %[temp5], %[temp5], $zero \n\t" \ + "precrqu_s.qb.ph %[temp6], %[temp6], $zero \n\t" \ + "precrqu_s.qb.ph %[temp7], %[temp7], $zero \n\t" \ + "srl %[temp5], %[temp5], 24 \n\t" \ + "srl %[temp6], %[temp6], 24 \n\t" \ + "srl %[temp7], %[temp7], 24 \n\t" \ + "sb %[temp5], " #R "(%[dst]) \n\t" \ + "sb %[temp6], " #G "(%[dst]) \n\t" \ + "sb %[temp7], " #B "(%[dst]) \n\t" \ + +#define ASM_CLOBBER_LIST() \ + : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), \ + [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), \ + [temp6]"=&r"(temp6), [temp7]"=&r"(temp7) \ + : [t_con_1]"r"(t_con_1), [t_con_2]"r"(t_con_2), [t_con_3]"r"(t_con_3), \ + [t_con_4]"r"(t_con_4), [t_con_5]"r"(t_con_5), [t_con_6]"r"(t_con_6), \ + [u]"r"(u), [v]"r"(v), [y]"r"(y), [dst]"r"(dst), \ + [t_con_7]"r"(t_con_7), [t_con_8]"r"(t_con_8) \ + : "memory", "hi", "lo" \ + +#define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A) \ +static void FUNC_NAME(const uint8_t* y, \ + const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len) { \ + int i; \ + uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7; \ + const int t_con_1 = 26149; \ + const int t_con_2 = 13320; \ + const int t_con_3 = 6419; \ + const int t_con_4 = 33050; \ + const int t_con_5 = 19077; \ + const int t_con_6 = 14234; \ + const int t_con_7 = 8708; \ + const int t_con_8 = 17685; \ + for (i = 0; i < (len >> 1); i++) { \ + __asm__ volatile ( \ + ROW_FUNC_PART_1() \ + ROW_FUNC_PART_2(R, G, B, 1) \ + ROW_FUNC_PART_2(R + XSTEP, G + XSTEP, B + XSTEP, 0) \ + ASM_CLOBBER_LIST() \ + ); \ + if (A) dst[A] = dst[A + XSTEP] = 0xff; \ + y += 2; \ + ++u; \ + ++v; \ + dst += 2 * XSTEP; \ + } \ + if (len & 1) { \ + __asm__ volatile ( \ + ROW_FUNC_PART_1() \ + ROW_FUNC_PART_2(R, G, B, 0) \ + ASM_CLOBBER_LIST() \ + ); \ + if (A) dst[A] = 0xff; \ + } \ +} + +ROW_FUNC(YuvToRgbRow, 3, 0, 1, 2, 0) +ROW_FUNC(YuvToRgbaRow, 4, 0, 1, 2, 3) +ROW_FUNC(YuvToBgrRow, 3, 2, 1, 0, 0) +ROW_FUNC(YuvToBgraRow, 4, 2, 1, 0, 3) + +#undef ROW_FUNC +#undef ASM_CLOBBER_LIST +#undef ROW_FUNC_PART_2 +#undef ROW_FUNC_PART_1 + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPInitSamplersMIPSdspR2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPSdspR2(void) { + WebPSamplers[MODE_RGB] = YuvToRgbRow; + WebPSamplers[MODE_RGBA] = YuvToRgbaRow; + WebPSamplers[MODE_BGR] = YuvToBgrRow; + WebPSamplers[MODE_BGRA] = YuvToBgraRow; +} + +#else // !WEBP_USE_MIPS_DSP_R2 + +WEBP_DSP_INIT_STUB(WebPInitSamplersMIPSdspR2) + +#endif // WEBP_USE_MIPS_DSP_R2 diff --git a/thirdparty/libwebp/dsp/yuv_sse2.c b/thirdparty/libwebp/dsp/yuv_sse2.c new file mode 100644 index 0000000000..e19bddff6c --- /dev/null +++ b/thirdparty/libwebp/dsp/yuv_sse2.c @@ -0,0 +1,775 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 functions +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./yuv.h" + +#if defined(WEBP_USE_SSE2) + +#include <emmintrin.h> + +//----------------------------------------------------------------------------- +// Convert spans of 32 pixels to various RGB formats for the fancy upsampler. + +// These constants are 14b fixed-point version of ITU-R BT.601 constants. +// R = (19077 * y + 26149 * v - 14234) >> 6 +// G = (19077 * y - 6419 * u - 13320 * v + 8708) >> 6 +// B = (19077 * y + 33050 * u - 17685) >> 6 +static void ConvertYUV444ToRGB(const __m128i* const Y0, + const __m128i* const U0, + const __m128i* const V0, + __m128i* const R, + __m128i* const G, + __m128i* const B) { + const __m128i k19077 = _mm_set1_epi16(19077); + const __m128i k26149 = _mm_set1_epi16(26149); + const __m128i k14234 = _mm_set1_epi16(14234); + // 33050 doesn't fit in a signed short: only use this with unsigned arithmetic + const __m128i k33050 = _mm_set1_epi16((short)33050); + const __m128i k17685 = _mm_set1_epi16(17685); + const __m128i k6419 = _mm_set1_epi16(6419); + const __m128i k13320 = _mm_set1_epi16(13320); + const __m128i k8708 = _mm_set1_epi16(8708); + + const __m128i Y1 = _mm_mulhi_epu16(*Y0, k19077); + + const __m128i R0 = _mm_mulhi_epu16(*V0, k26149); + const __m128i R1 = _mm_sub_epi16(Y1, k14234); + const __m128i R2 = _mm_add_epi16(R1, R0); + + const __m128i G0 = _mm_mulhi_epu16(*U0, k6419); + const __m128i G1 = _mm_mulhi_epu16(*V0, k13320); + const __m128i G2 = _mm_add_epi16(Y1, k8708); + const __m128i G3 = _mm_add_epi16(G0, G1); + const __m128i G4 = _mm_sub_epi16(G2, G3); + + // be careful with the saturated *unsigned* arithmetic here! + const __m128i B0 = _mm_mulhi_epu16(*U0, k33050); + const __m128i B1 = _mm_adds_epu16(B0, Y1); + const __m128i B2 = _mm_subs_epu16(B1, k17685); + + // use logical shift for B2, which can be larger than 32767 + *R = _mm_srai_epi16(R2, 6); // range: [-14234, 30815] + *G = _mm_srai_epi16(G4, 6); // range: [-10953, 27710] + *B = _mm_srli_epi16(B2, 6); // range: [0, 34238] +} + +// Load the bytes into the *upper* part of 16b words. That's "<< 8", basically. +static WEBP_INLINE __m128i Load_HI_16(const uint8_t* src) { + const __m128i zero = _mm_setzero_si128(); + return _mm_unpacklo_epi8(zero, _mm_loadl_epi64((const __m128i*)src)); +} + +// Load and replicate the U/V samples +static WEBP_INLINE __m128i Load_UV_HI_8(const uint8_t* src) { + const __m128i zero = _mm_setzero_si128(); + const __m128i tmp0 = _mm_cvtsi32_si128(*(const uint32_t*)src); + const __m128i tmp1 = _mm_unpacklo_epi8(zero, tmp0); + return _mm_unpacklo_epi16(tmp1, tmp1); // replicate samples +} + +// Convert 32 samples of YUV444 to R/G/B +static void YUV444ToRGB(const uint8_t* const y, + const uint8_t* const u, + const uint8_t* const v, + __m128i* const R, __m128i* const G, __m128i* const B) { + const __m128i Y0 = Load_HI_16(y), U0 = Load_HI_16(u), V0 = Load_HI_16(v); + ConvertYUV444ToRGB(&Y0, &U0, &V0, R, G, B); +} + +// Convert 32 samples of YUV420 to R/G/B +static void YUV420ToRGB(const uint8_t* const y, + const uint8_t* const u, + const uint8_t* const v, + __m128i* const R, __m128i* const G, __m128i* const B) { + const __m128i Y0 = Load_HI_16(y), U0 = Load_UV_HI_8(u), V0 = Load_UV_HI_8(v); + ConvertYUV444ToRGB(&Y0, &U0, &V0, R, G, B); +} + +// Pack R/G/B/A results into 32b output. +static WEBP_INLINE void PackAndStore4(const __m128i* const R, + const __m128i* const G, + const __m128i* const B, + const __m128i* const A, + uint8_t* const dst) { + const __m128i rb = _mm_packus_epi16(*R, *B); + const __m128i ga = _mm_packus_epi16(*G, *A); + const __m128i rg = _mm_unpacklo_epi8(rb, ga); + const __m128i ba = _mm_unpackhi_epi8(rb, ga); + const __m128i RGBA_lo = _mm_unpacklo_epi16(rg, ba); + const __m128i RGBA_hi = _mm_unpackhi_epi16(rg, ba); + _mm_storeu_si128((__m128i*)(dst + 0), RGBA_lo); + _mm_storeu_si128((__m128i*)(dst + 16), RGBA_hi); +} + +// Pack R/G/B/A results into 16b output. +static WEBP_INLINE void PackAndStore4444(const __m128i* const R, + const __m128i* const G, + const __m128i* const B, + const __m128i* const A, + uint8_t* const dst) { +#if !defined(WEBP_SWAP_16BIT_CSP) + const __m128i rg0 = _mm_packus_epi16(*R, *G); + const __m128i ba0 = _mm_packus_epi16(*B, *A); +#else + const __m128i rg0 = _mm_packus_epi16(*B, *A); + const __m128i ba0 = _mm_packus_epi16(*R, *G); +#endif + const __m128i mask_0xf0 = _mm_set1_epi8(0xf0); + const __m128i rb1 = _mm_unpacklo_epi8(rg0, ba0); // rbrbrbrbrb... + const __m128i ga1 = _mm_unpackhi_epi8(rg0, ba0); // gagagagaga... + const __m128i rb2 = _mm_and_si128(rb1, mask_0xf0); + const __m128i ga2 = _mm_srli_epi16(_mm_and_si128(ga1, mask_0xf0), 4); + const __m128i rgba4444 = _mm_or_si128(rb2, ga2); + _mm_storeu_si128((__m128i*)dst, rgba4444); +} + +// Pack R/G/B results into 16b output. +static WEBP_INLINE void PackAndStore565(const __m128i* const R, + const __m128i* const G, + const __m128i* const B, + uint8_t* const dst) { + const __m128i r0 = _mm_packus_epi16(*R, *R); + const __m128i g0 = _mm_packus_epi16(*G, *G); + const __m128i b0 = _mm_packus_epi16(*B, *B); + const __m128i r1 = _mm_and_si128(r0, _mm_set1_epi8(0xf8)); + const __m128i b1 = _mm_and_si128(_mm_srli_epi16(b0, 3), _mm_set1_epi8(0x1f)); + const __m128i g1 = _mm_srli_epi16(_mm_and_si128(g0, _mm_set1_epi8(0xe0)), 5); + const __m128i g2 = _mm_slli_epi16(_mm_and_si128(g0, _mm_set1_epi8(0x1c)), 3); + const __m128i rg = _mm_or_si128(r1, g1); + const __m128i gb = _mm_or_si128(g2, b1); +#if !defined(WEBP_SWAP_16BIT_CSP) + const __m128i rgb565 = _mm_unpacklo_epi8(rg, gb); +#else + const __m128i rgb565 = _mm_unpacklo_epi8(gb, rg); +#endif + _mm_storeu_si128((__m128i*)dst, rgb565); +} + +// Function used several times in PlanarTo24b. +// It samples the in buffer as follows: one every two unsigned char is stored +// at the beginning of the buffer, while the other half is stored at the end. +static WEBP_INLINE void PlanarTo24bHelper(const __m128i* const in /*in[6]*/, + __m128i* const out /*out[6]*/) { + const __m128i v_mask = _mm_set1_epi16(0x00ff); + + // Take one every two upper 8b values. + out[0] = _mm_packus_epi16(_mm_and_si128(in[0], v_mask), + _mm_and_si128(in[1], v_mask)); + out[1] = _mm_packus_epi16(_mm_and_si128(in[2], v_mask), + _mm_and_si128(in[3], v_mask)); + out[2] = _mm_packus_epi16(_mm_and_si128(in[4], v_mask), + _mm_and_si128(in[5], v_mask)); + // Take one every two lower 8b values. + out[3] = _mm_packus_epi16(_mm_srli_epi16(in[0], 8), _mm_srli_epi16(in[1], 8)); + out[4] = _mm_packus_epi16(_mm_srli_epi16(in[2], 8), _mm_srli_epi16(in[3], 8)); + out[5] = _mm_packus_epi16(_mm_srli_epi16(in[4], 8), _mm_srli_epi16(in[5], 8)); +} + +// Pack the planar buffers +// rrrr... rrrr... gggg... gggg... bbbb... bbbb.... +// triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ... +static WEBP_INLINE void PlanarTo24b(__m128i* const in /*in[6]*/, uint8_t* rgb) { + // The input is 6 registers of sixteen 8b but for the sake of explanation, + // let's take 6 registers of four 8b values. + // To pack, we will keep taking one every two 8b integer and move it + // around as follows: + // Input: + // r0r1r2r3 | r4r5r6r7 | g0g1g2g3 | g4g5g6g7 | b0b1b2b3 | b4b5b6b7 + // Split the 6 registers in two sets of 3 registers: the first set as the even + // 8b bytes, the second the odd ones: + // r0r2r4r6 | g0g2g4g6 | b0b2b4b6 | r1r3r5r7 | g1g3g5g7 | b1b3b5b7 + // Repeat the same permutations twice more: + // r0r4g0g4 | b0b4r1r5 | g1g5b1b5 | r2r6g2g6 | b2b6r3r7 | g3g7b3b7 + // r0g0b0r1 | g1b1r2g2 | b2r3g3b3 | r4g4b4r5 | g5b5r6g6 | b6r7g7b7 + __m128i tmp[6]; + PlanarTo24bHelper(in, tmp); + PlanarTo24bHelper(tmp, in); + PlanarTo24bHelper(in, tmp); + // We need to do it two more times than the example as we have sixteen bytes. + PlanarTo24bHelper(tmp, in); + PlanarTo24bHelper(in, tmp); + + _mm_storeu_si128((__m128i*)(rgb + 0), tmp[0]); + _mm_storeu_si128((__m128i*)(rgb + 16), tmp[1]); + _mm_storeu_si128((__m128i*)(rgb + 32), tmp[2]); + _mm_storeu_si128((__m128i*)(rgb + 48), tmp[3]); + _mm_storeu_si128((__m128i*)(rgb + 64), tmp[4]); + _mm_storeu_si128((__m128i*)(rgb + 80), tmp[5]); +} +#undef MK_UINT32 + +void VP8YuvToRgba32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst) { + const __m128i kAlpha = _mm_set1_epi16(255); + int n; + for (n = 0; n < 32; n += 8, dst += 32) { + __m128i R, G, B; + YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); + PackAndStore4(&R, &G, &B, &kAlpha, dst); + } +} + +void VP8YuvToBgra32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst) { + const __m128i kAlpha = _mm_set1_epi16(255); + int n; + for (n = 0; n < 32; n += 8, dst += 32) { + __m128i R, G, B; + YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); + PackAndStore4(&B, &G, &R, &kAlpha, dst); + } +} + +void VP8YuvToArgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst) { + const __m128i kAlpha = _mm_set1_epi16(255); + int n; + for (n = 0; n < 32; n += 8, dst += 32) { + __m128i R, G, B; + YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); + PackAndStore4(&kAlpha, &R, &G, &B, dst); + } +} + +void VP8YuvToRgba444432(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst) { + const __m128i kAlpha = _mm_set1_epi16(255); + int n; + for (n = 0; n < 32; n += 8, dst += 16) { + __m128i R, G, B; + YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); + PackAndStore4444(&R, &G, &B, &kAlpha, dst); + } +} + +void VP8YuvToRgb56532(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst) { + int n; + for (n = 0; n < 32; n += 8, dst += 16) { + __m128i R, G, B; + YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); + PackAndStore565(&R, &G, &B, dst); + } +} + +void VP8YuvToRgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst) { + __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; + __m128i rgb[6]; + + YUV444ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0); + YUV444ToRGB(y + 8, u + 8, v + 8, &R1, &G1, &B1); + YUV444ToRGB(y + 16, u + 16, v + 16, &R2, &G2, &B2); + YUV444ToRGB(y + 24, u + 24, v + 24, &R3, &G3, &B3); + + // Cast to 8b and store as RRRRGGGGBBBB. + rgb[0] = _mm_packus_epi16(R0, R1); + rgb[1] = _mm_packus_epi16(R2, R3); + rgb[2] = _mm_packus_epi16(G0, G1); + rgb[3] = _mm_packus_epi16(G2, G3); + rgb[4] = _mm_packus_epi16(B0, B1); + rgb[5] = _mm_packus_epi16(B2, B3); + + // Pack as RGBRGBRGBRGB. + PlanarTo24b(rgb, dst); +} + +void VP8YuvToBgr32(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst) { + __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; + __m128i bgr[6]; + + YUV444ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0); + YUV444ToRGB(y + 8, u + 8, v + 8, &R1, &G1, &B1); + YUV444ToRGB(y + 16, u + 16, v + 16, &R2, &G2, &B2); + YUV444ToRGB(y + 24, u + 24, v + 24, &R3, &G3, &B3); + + // Cast to 8b and store as BBBBGGGGRRRR. + bgr[0] = _mm_packus_epi16(B0, B1); + bgr[1] = _mm_packus_epi16(B2, B3); + bgr[2] = _mm_packus_epi16(G0, G1); + bgr[3] = _mm_packus_epi16(G2, G3); + bgr[4] = _mm_packus_epi16(R0, R1); + bgr[5] = _mm_packus_epi16(R2, R3); + + // Pack as BGRBGRBGRBGR. + PlanarTo24b(bgr, dst); +} + +//----------------------------------------------------------------------------- +// Arbitrary-length row conversion functions + +static void YuvToRgbaRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len) { + const __m128i kAlpha = _mm_set1_epi16(255); + int n; + for (n = 0; n + 8 <= len; n += 8, dst += 32) { + __m128i R, G, B; + YUV420ToRGB(y, u, v, &R, &G, &B); + PackAndStore4(&R, &G, &B, &kAlpha, dst); + y += 8; + u += 4; + v += 4; + } + for (; n < len; ++n) { // Finish off + VP8YuvToRgba(y[0], u[0], v[0], dst); + dst += 4; + y += 1; + u += (n & 1); + v += (n & 1); + } +} + +static void YuvToBgraRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len) { + const __m128i kAlpha = _mm_set1_epi16(255); + int n; + for (n = 0; n + 8 <= len; n += 8, dst += 32) { + __m128i R, G, B; + YUV420ToRGB(y, u, v, &R, &G, &B); + PackAndStore4(&B, &G, &R, &kAlpha, dst); + y += 8; + u += 4; + v += 4; + } + for (; n < len; ++n) { // Finish off + VP8YuvToBgra(y[0], u[0], v[0], dst); + dst += 4; + y += 1; + u += (n & 1); + v += (n & 1); + } +} + +static void YuvToArgbRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len) { + const __m128i kAlpha = _mm_set1_epi16(255); + int n; + for (n = 0; n + 8 <= len; n += 8, dst += 32) { + __m128i R, G, B; + YUV420ToRGB(y, u, v, &R, &G, &B); + PackAndStore4(&kAlpha, &R, &G, &B, dst); + y += 8; + u += 4; + v += 4; + } + for (; n < len; ++n) { // Finish off + VP8YuvToArgb(y[0], u[0], v[0], dst); + dst += 4; + y += 1; + u += (n & 1); + v += (n & 1); + } +} + +static void YuvToRgbRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len) { + int n; + for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) { + __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; + __m128i rgb[6]; + + YUV420ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0); + YUV420ToRGB(y + 8, u + 4, v + 4, &R1, &G1, &B1); + YUV420ToRGB(y + 16, u + 8, v + 8, &R2, &G2, &B2); + YUV420ToRGB(y + 24, u + 12, v + 12, &R3, &G3, &B3); + + // Cast to 8b and store as RRRRGGGGBBBB. + rgb[0] = _mm_packus_epi16(R0, R1); + rgb[1] = _mm_packus_epi16(R2, R3); + rgb[2] = _mm_packus_epi16(G0, G1); + rgb[3] = _mm_packus_epi16(G2, G3); + rgb[4] = _mm_packus_epi16(B0, B1); + rgb[5] = _mm_packus_epi16(B2, B3); + + // Pack as RGBRGBRGBRGB. + PlanarTo24b(rgb, dst); + + y += 32; + u += 16; + v += 16; + } + for (; n < len; ++n) { // Finish off + VP8YuvToRgb(y[0], u[0], v[0], dst); + dst += 3; + y += 1; + u += (n & 1); + v += (n & 1); + } +} + +static void YuvToBgrRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len) { + int n; + for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) { + __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; + __m128i bgr[6]; + + YUV420ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0); + YUV420ToRGB(y + 8, u + 4, v + 4, &R1, &G1, &B1); + YUV420ToRGB(y + 16, u + 8, v + 8, &R2, &G2, &B2); + YUV420ToRGB(y + 24, u + 12, v + 12, &R3, &G3, &B3); + + // Cast to 8b and store as BBBBGGGGRRRR. + bgr[0] = _mm_packus_epi16(B0, B1); + bgr[1] = _mm_packus_epi16(B2, B3); + bgr[2] = _mm_packus_epi16(G0, G1); + bgr[3] = _mm_packus_epi16(G2, G3); + bgr[4] = _mm_packus_epi16(R0, R1); + bgr[5] = _mm_packus_epi16(R2, R3); + + // Pack as BGRBGRBGRBGR. + PlanarTo24b(bgr, dst); + + y += 32; + u += 16; + v += 16; + } + for (; n < len; ++n) { // Finish off + VP8YuvToBgr(y[0], u[0], v[0], dst); + dst += 3; + y += 1; + u += (n & 1); + v += (n & 1); + } +} + +//------------------------------------------------------------------------------ +// Entry point + +extern void WebPInitSamplersSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersSSE2(void) { + WebPSamplers[MODE_RGB] = YuvToRgbRow; + WebPSamplers[MODE_RGBA] = YuvToRgbaRow; + WebPSamplers[MODE_BGR] = YuvToBgrRow; + WebPSamplers[MODE_BGRA] = YuvToBgraRow; + WebPSamplers[MODE_ARGB] = YuvToArgbRow; +} + +//------------------------------------------------------------------------------ +// RGB24/32 -> YUV converters + +// Load eight 16b-words from *src. +#define LOAD_16(src) _mm_loadu_si128((const __m128i*)(src)) +// Store either 16b-words into *dst +#define STORE_16(V, dst) _mm_storeu_si128((__m128i*)(dst), (V)) + +// Function that inserts a value of the second half of the in buffer in between +// every two char of the first half. +static WEBP_INLINE void RGB24PackedToPlanarHelper( + const __m128i* const in /*in[6]*/, __m128i* const out /*out[6]*/) { + out[0] = _mm_unpacklo_epi8(in[0], in[3]); + out[1] = _mm_unpackhi_epi8(in[0], in[3]); + out[2] = _mm_unpacklo_epi8(in[1], in[4]); + out[3] = _mm_unpackhi_epi8(in[1], in[4]); + out[4] = _mm_unpacklo_epi8(in[2], in[5]); + out[5] = _mm_unpackhi_epi8(in[2], in[5]); +} + +// Unpack the 8b input rgbrgbrgbrgb ... as contiguous registers: +// rrrr... rrrr... gggg... gggg... bbbb... bbbb.... +// Similar to PlanarTo24bHelper(), but in reverse order. +static WEBP_INLINE void RGB24PackedToPlanar(const uint8_t* const rgb, + __m128i* const out /*out[6]*/) { + __m128i tmp[6]; + tmp[0] = _mm_loadu_si128((const __m128i*)(rgb + 0)); + tmp[1] = _mm_loadu_si128((const __m128i*)(rgb + 16)); + tmp[2] = _mm_loadu_si128((const __m128i*)(rgb + 32)); + tmp[3] = _mm_loadu_si128((const __m128i*)(rgb + 48)); + tmp[4] = _mm_loadu_si128((const __m128i*)(rgb + 64)); + tmp[5] = _mm_loadu_si128((const __m128i*)(rgb + 80)); + + RGB24PackedToPlanarHelper(tmp, out); + RGB24PackedToPlanarHelper(out, tmp); + RGB24PackedToPlanarHelper(tmp, out); + RGB24PackedToPlanarHelper(out, tmp); + RGB24PackedToPlanarHelper(tmp, out); +} + +// Convert 8 packed ARGB to r[], g[], b[] +static WEBP_INLINE void RGB32PackedToPlanar(const uint32_t* const argb, + __m128i* const r, + __m128i* const g, + __m128i* const b) { + const __m128i zero = _mm_setzero_si128(); + const __m128i in0 = LOAD_16(argb + 0); // argb3 | argb2 | argb1 | argb0 + const __m128i in1 = LOAD_16(argb + 4); // argb7 | argb6 | argb5 | argb4 + // column-wise transpose + const __m128i A0 = _mm_unpacklo_epi8(in0, in1); + const __m128i A1 = _mm_unpackhi_epi8(in0, in1); + const __m128i B0 = _mm_unpacklo_epi8(A0, A1); + const __m128i B1 = _mm_unpackhi_epi8(A0, A1); + // C0 = g7 g6 ... g1 g0 | b7 b6 ... b1 b0 + // C1 = a7 a6 ... a1 a0 | r7 r6 ... r1 r0 + const __m128i C0 = _mm_unpacklo_epi8(B0, B1); + const __m128i C1 = _mm_unpackhi_epi8(B0, B1); + // store 16b + *r = _mm_unpacklo_epi8(C1, zero); + *g = _mm_unpackhi_epi8(C0, zero); + *b = _mm_unpacklo_epi8(C0, zero); +} + +// This macro computes (RG * MULT_RG + GB * MULT_GB + ROUNDER) >> DESCALE_FIX +// It's a macro and not a function because we need to use immediate values with +// srai_epi32, e.g. +#define TRANSFORM(RG_LO, RG_HI, GB_LO, GB_HI, MULT_RG, MULT_GB, \ + ROUNDER, DESCALE_FIX, OUT) do { \ + const __m128i V0_lo = _mm_madd_epi16(RG_LO, MULT_RG); \ + const __m128i V0_hi = _mm_madd_epi16(RG_HI, MULT_RG); \ + const __m128i V1_lo = _mm_madd_epi16(GB_LO, MULT_GB); \ + const __m128i V1_hi = _mm_madd_epi16(GB_HI, MULT_GB); \ + const __m128i V2_lo = _mm_add_epi32(V0_lo, V1_lo); \ + const __m128i V2_hi = _mm_add_epi32(V0_hi, V1_hi); \ + const __m128i V3_lo = _mm_add_epi32(V2_lo, ROUNDER); \ + const __m128i V3_hi = _mm_add_epi32(V2_hi, ROUNDER); \ + const __m128i V5_lo = _mm_srai_epi32(V3_lo, DESCALE_FIX); \ + const __m128i V5_hi = _mm_srai_epi32(V3_hi, DESCALE_FIX); \ + (OUT) = _mm_packs_epi32(V5_lo, V5_hi); \ +} while (0) + +#define MK_CST_16(A, B) _mm_set_epi16((B), (A), (B), (A), (B), (A), (B), (A)) +static WEBP_INLINE void ConvertRGBToY(const __m128i* const R, + const __m128i* const G, + const __m128i* const B, + __m128i* const Y) { + const __m128i kRG_y = MK_CST_16(16839, 33059 - 16384); + const __m128i kGB_y = MK_CST_16(16384, 6420); + const __m128i kHALF_Y = _mm_set1_epi32((16 << YUV_FIX) + YUV_HALF); + + const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G); + const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G); + const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B); + const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B); + TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_y, kGB_y, kHALF_Y, YUV_FIX, *Y); +} + +static WEBP_INLINE void ConvertRGBToUV(const __m128i* const R, + const __m128i* const G, + const __m128i* const B, + __m128i* const U, __m128i* const V) { + const __m128i kRG_u = MK_CST_16(-9719, -19081); + const __m128i kGB_u = MK_CST_16(0, 28800); + const __m128i kRG_v = MK_CST_16(28800, 0); + const __m128i kGB_v = MK_CST_16(-24116, -4684); + const __m128i kHALF_UV = _mm_set1_epi32(((128 << YUV_FIX) + YUV_HALF) << 2); + + const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G); + const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G); + const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B); + const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B); + TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_u, kGB_u, + kHALF_UV, YUV_FIX + 2, *U); + TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_v, kGB_v, + kHALF_UV, YUV_FIX + 2, *V); +} + +#undef MK_CST_16 +#undef TRANSFORM + +static void ConvertRGB24ToY(const uint8_t* rgb, uint8_t* y, int width) { + const int max_width = width & ~31; + int i; + for (i = 0; i < max_width; rgb += 3 * 16 * 2) { + __m128i rgb_plane[6]; + int j; + + RGB24PackedToPlanar(rgb, rgb_plane); + + for (j = 0; j < 2; ++j, i += 16) { + const __m128i zero = _mm_setzero_si128(); + __m128i r, g, b, Y0, Y1; + + // Convert to 16-bit Y. + r = _mm_unpacklo_epi8(rgb_plane[0 + j], zero); + g = _mm_unpacklo_epi8(rgb_plane[2 + j], zero); + b = _mm_unpacklo_epi8(rgb_plane[4 + j], zero); + ConvertRGBToY(&r, &g, &b, &Y0); + + // Convert to 16-bit Y. + r = _mm_unpackhi_epi8(rgb_plane[0 + j], zero); + g = _mm_unpackhi_epi8(rgb_plane[2 + j], zero); + b = _mm_unpackhi_epi8(rgb_plane[4 + j], zero); + ConvertRGBToY(&r, &g, &b, &Y1); + + // Cast to 8-bit and store. + STORE_16(_mm_packus_epi16(Y0, Y1), y + i); + } + } + for (; i < width; ++i, rgb += 3) { // left-over + y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF); + } +} + +static void ConvertBGR24ToY(const uint8_t* bgr, uint8_t* y, int width) { + const int max_width = width & ~31; + int i; + for (i = 0; i < max_width; bgr += 3 * 16 * 2) { + __m128i bgr_plane[6]; + int j; + + RGB24PackedToPlanar(bgr, bgr_plane); + + for (j = 0; j < 2; ++j, i += 16) { + const __m128i zero = _mm_setzero_si128(); + __m128i r, g, b, Y0, Y1; + + // Convert to 16-bit Y. + b = _mm_unpacklo_epi8(bgr_plane[0 + j], zero); + g = _mm_unpacklo_epi8(bgr_plane[2 + j], zero); + r = _mm_unpacklo_epi8(bgr_plane[4 + j], zero); + ConvertRGBToY(&r, &g, &b, &Y0); + + // Convert to 16-bit Y. + b = _mm_unpackhi_epi8(bgr_plane[0 + j], zero); + g = _mm_unpackhi_epi8(bgr_plane[2 + j], zero); + r = _mm_unpackhi_epi8(bgr_plane[4 + j], zero); + ConvertRGBToY(&r, &g, &b, &Y1); + + // Cast to 8-bit and store. + STORE_16(_mm_packus_epi16(Y0, Y1), y + i); + } + } + for (; i < width; ++i, bgr += 3) { // left-over + y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF); + } +} + +static void ConvertARGBToY(const uint32_t* argb, uint8_t* y, int width) { + const int max_width = width & ~15; + int i; + for (i = 0; i < max_width; i += 16) { + __m128i r, g, b, Y0, Y1; + RGB32PackedToPlanar(&argb[i + 0], &r, &g, &b); + ConvertRGBToY(&r, &g, &b, &Y0); + RGB32PackedToPlanar(&argb[i + 8], &r, &g, &b); + ConvertRGBToY(&r, &g, &b, &Y1); + STORE_16(_mm_packus_epi16(Y0, Y1), y + i); + } + for (; i < width; ++i) { // left-over + const uint32_t p = argb[i]; + y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff, + YUV_HALF); + } +} + +// Horizontal add (doubled) of two 16b values, result is 16b. +// in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ... +static void HorizontalAddPack(const __m128i* const A, const __m128i* const B, + __m128i* const out) { + const __m128i k2 = _mm_set1_epi16(2); + const __m128i C = _mm_madd_epi16(*A, k2); + const __m128i D = _mm_madd_epi16(*B, k2); + *out = _mm_packs_epi32(C, D); +} + +static void ConvertARGBToUV(const uint32_t* argb, uint8_t* u, uint8_t* v, + int src_width, int do_store) { + const int max_width = src_width & ~31; + int i; + for (i = 0; i < max_width; i += 32, u += 16, v += 16) { + __m128i r0, g0, b0, r1, g1, b1, U0, V0, U1, V1; + RGB32PackedToPlanar(&argb[i + 0], &r0, &g0, &b0); + RGB32PackedToPlanar(&argb[i + 8], &r1, &g1, &b1); + HorizontalAddPack(&r0, &r1, &r0); + HorizontalAddPack(&g0, &g1, &g0); + HorizontalAddPack(&b0, &b1, &b0); + ConvertRGBToUV(&r0, &g0, &b0, &U0, &V0); + + RGB32PackedToPlanar(&argb[i + 16], &r0, &g0, &b0); + RGB32PackedToPlanar(&argb[i + 24], &r1, &g1, &b1); + HorizontalAddPack(&r0, &r1, &r0); + HorizontalAddPack(&g0, &g1, &g0); + HorizontalAddPack(&b0, &b1, &b0); + ConvertRGBToUV(&r0, &g0, &b0, &U1, &V1); + + U0 = _mm_packus_epi16(U0, U1); + V0 = _mm_packus_epi16(V0, V1); + if (!do_store) { + const __m128i prev_u = LOAD_16(u); + const __m128i prev_v = LOAD_16(v); + U0 = _mm_avg_epu8(U0, prev_u); + V0 = _mm_avg_epu8(V0, prev_v); + } + STORE_16(U0, u); + STORE_16(V0, v); + } + if (i < src_width) { // left-over + WebPConvertARGBToUV_C(argb + i, u, v, src_width - i, do_store); + } +} + +// Convert 16 packed ARGB 16b-values to r[], g[], b[] +static WEBP_INLINE void RGBA32PackedToPlanar_16b(const uint16_t* const rgbx, + __m128i* const r, + __m128i* const g, + __m128i* const b) { + const __m128i in0 = LOAD_16(rgbx + 0); // r0 | g0 | b0 |x| r1 | g1 | b1 |x + const __m128i in1 = LOAD_16(rgbx + 8); // r2 | g2 | b2 |x| r3 | g3 | b3 |x + const __m128i in2 = LOAD_16(rgbx + 16); // r4 | ... + const __m128i in3 = LOAD_16(rgbx + 24); // r6 | ... + // column-wise transpose + const __m128i A0 = _mm_unpacklo_epi16(in0, in1); + const __m128i A1 = _mm_unpackhi_epi16(in0, in1); + const __m128i A2 = _mm_unpacklo_epi16(in2, in3); + const __m128i A3 = _mm_unpackhi_epi16(in2, in3); + const __m128i B0 = _mm_unpacklo_epi16(A0, A1); // r0 r1 r2 r3 | g0 g1 .. + const __m128i B1 = _mm_unpackhi_epi16(A0, A1); // b0 b1 b2 b3 | x x x x + const __m128i B2 = _mm_unpacklo_epi16(A2, A3); // r4 r5 r6 r7 | g4 g5 .. + const __m128i B3 = _mm_unpackhi_epi16(A2, A3); // b4 b5 b6 b7 | x x x x + *r = _mm_unpacklo_epi64(B0, B2); + *g = _mm_unpackhi_epi64(B0, B2); + *b = _mm_unpacklo_epi64(B1, B3); +} + +static void ConvertRGBA32ToUV(const uint16_t* rgb, + uint8_t* u, uint8_t* v, int width) { + const int max_width = width & ~15; + const uint16_t* const last_rgb = rgb + 4 * max_width; + while (rgb < last_rgb) { + __m128i r, g, b, U0, V0, U1, V1; + RGBA32PackedToPlanar_16b(rgb + 0, &r, &g, &b); + ConvertRGBToUV(&r, &g, &b, &U0, &V0); + RGBA32PackedToPlanar_16b(rgb + 32, &r, &g, &b); + ConvertRGBToUV(&r, &g, &b, &U1, &V1); + STORE_16(_mm_packus_epi16(U0, U1), u); + STORE_16(_mm_packus_epi16(V0, V1), v); + u += 16; + v += 16; + rgb += 2 * 32; + } + if (max_width < width) { // left-over + WebPConvertRGBA32ToUV_C(rgb, u, v, width - max_width); + } +} + +//------------------------------------------------------------------------------ + +extern void WebPInitConvertARGBToYUVSSE2(void); + +WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUVSSE2(void) { + WebPConvertARGBToY = ConvertARGBToY; + WebPConvertARGBToUV = ConvertARGBToUV; + + WebPConvertRGB24ToY = ConvertRGB24ToY; + WebPConvertBGR24ToY = ConvertBGR24ToY; + + WebPConvertRGBA32ToUV = ConvertRGBA32ToUV; +} + +#else // !WEBP_USE_SSE2 + +WEBP_DSP_INIT_STUB(WebPInitSamplersSSE2) +WEBP_DSP_INIT_STUB(WebPInitConvertARGBToYUVSSE2) + +#endif // WEBP_USE_SSE2 diff --git a/thirdparty/libwebp/dsp/yuv_tables_sse2.h b/thirdparty/libwebp/dsp/yuv_tables_sse2.h new file mode 100644 index 0000000000..2b0f057518 --- /dev/null +++ b/thirdparty/libwebp/dsp/yuv_tables_sse2.h @@ -0,0 +1,536 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 tables for YUV->RGB conversion (12kB overall) +// +// Author: Skal (pascal.massimino@gmail.com) + +// This file is not compiled, but #include'd directly from yuv.c +// Only used if WEBP_YUV_USE_SSE2_TABLES is defined. + +static const VP8kCstSSE2 VP8kYtoRGBA[256] = { + {{0xfffb77b0, 0xfffb77b0, 0xfffb77b0, 0x003fc000}}, + {{0xfffbc235, 0xfffbc235, 0xfffbc235, 0x003fc000}}, + {{0xfffc0cba, 0xfffc0cba, 0xfffc0cba, 0x003fc000}}, + {{0xfffc573f, 0xfffc573f, 0xfffc573f, 0x003fc000}}, + {{0xfffca1c4, 0xfffca1c4, 0xfffca1c4, 0x003fc000}}, + {{0xfffcec49, 0xfffcec49, 0xfffcec49, 0x003fc000}}, + {{0xfffd36ce, 0xfffd36ce, 0xfffd36ce, 0x003fc000}}, + {{0xfffd8153, 0xfffd8153, 0xfffd8153, 0x003fc000}}, + {{0xfffdcbd8, 0xfffdcbd8, 0xfffdcbd8, 0x003fc000}}, + {{0xfffe165d, 0xfffe165d, 0xfffe165d, 0x003fc000}}, + {{0xfffe60e2, 0xfffe60e2, 0xfffe60e2, 0x003fc000}}, + {{0xfffeab67, 0xfffeab67, 0xfffeab67, 0x003fc000}}, + {{0xfffef5ec, 0xfffef5ec, 0xfffef5ec, 0x003fc000}}, + {{0xffff4071, 0xffff4071, 0xffff4071, 0x003fc000}}, + {{0xffff8af6, 0xffff8af6, 0xffff8af6, 0x003fc000}}, + {{0xffffd57b, 0xffffd57b, 0xffffd57b, 0x003fc000}}, + {{0x00002000, 0x00002000, 0x00002000, 0x003fc000}}, + {{0x00006a85, 0x00006a85, 0x00006a85, 0x003fc000}}, + {{0x0000b50a, 0x0000b50a, 0x0000b50a, 0x003fc000}}, + {{0x0000ff8f, 0x0000ff8f, 0x0000ff8f, 0x003fc000}}, + {{0x00014a14, 0x00014a14, 0x00014a14, 0x003fc000}}, + {{0x00019499, 0x00019499, 0x00019499, 0x003fc000}}, + {{0x0001df1e, 0x0001df1e, 0x0001df1e, 0x003fc000}}, + {{0x000229a3, 0x000229a3, 0x000229a3, 0x003fc000}}, + {{0x00027428, 0x00027428, 0x00027428, 0x003fc000}}, + {{0x0002bead, 0x0002bead, 0x0002bead, 0x003fc000}}, + {{0x00030932, 0x00030932, 0x00030932, 0x003fc000}}, + {{0x000353b7, 0x000353b7, 0x000353b7, 0x003fc000}}, + {{0x00039e3c, 0x00039e3c, 0x00039e3c, 0x003fc000}}, + {{0x0003e8c1, 0x0003e8c1, 0x0003e8c1, 0x003fc000}}, + {{0x00043346, 0x00043346, 0x00043346, 0x003fc000}}, + {{0x00047dcb, 0x00047dcb, 0x00047dcb, 0x003fc000}}, + {{0x0004c850, 0x0004c850, 0x0004c850, 0x003fc000}}, + {{0x000512d5, 0x000512d5, 0x000512d5, 0x003fc000}}, + {{0x00055d5a, 0x00055d5a, 0x00055d5a, 0x003fc000}}, + {{0x0005a7df, 0x0005a7df, 0x0005a7df, 0x003fc000}}, + {{0x0005f264, 0x0005f264, 0x0005f264, 0x003fc000}}, + {{0x00063ce9, 0x00063ce9, 0x00063ce9, 0x003fc000}}, + {{0x0006876e, 0x0006876e, 0x0006876e, 0x003fc000}}, + {{0x0006d1f3, 0x0006d1f3, 0x0006d1f3, 0x003fc000}}, + {{0x00071c78, 0x00071c78, 0x00071c78, 0x003fc000}}, + {{0x000766fd, 0x000766fd, 0x000766fd, 0x003fc000}}, + {{0x0007b182, 0x0007b182, 0x0007b182, 0x003fc000}}, + {{0x0007fc07, 0x0007fc07, 0x0007fc07, 0x003fc000}}, + {{0x0008468c, 0x0008468c, 0x0008468c, 0x003fc000}}, + {{0x00089111, 0x00089111, 0x00089111, 0x003fc000}}, + {{0x0008db96, 0x0008db96, 0x0008db96, 0x003fc000}}, + {{0x0009261b, 0x0009261b, 0x0009261b, 0x003fc000}}, + {{0x000970a0, 0x000970a0, 0x000970a0, 0x003fc000}}, + {{0x0009bb25, 0x0009bb25, 0x0009bb25, 0x003fc000}}, + {{0x000a05aa, 0x000a05aa, 0x000a05aa, 0x003fc000}}, + {{0x000a502f, 0x000a502f, 0x000a502f, 0x003fc000}}, + {{0x000a9ab4, 0x000a9ab4, 0x000a9ab4, 0x003fc000}}, + {{0x000ae539, 0x000ae539, 0x000ae539, 0x003fc000}}, + {{0x000b2fbe, 0x000b2fbe, 0x000b2fbe, 0x003fc000}}, + {{0x000b7a43, 0x000b7a43, 0x000b7a43, 0x003fc000}}, + {{0x000bc4c8, 0x000bc4c8, 0x000bc4c8, 0x003fc000}}, + {{0x000c0f4d, 0x000c0f4d, 0x000c0f4d, 0x003fc000}}, + {{0x000c59d2, 0x000c59d2, 0x000c59d2, 0x003fc000}}, + {{0x000ca457, 0x000ca457, 0x000ca457, 0x003fc000}}, + {{0x000ceedc, 0x000ceedc, 0x000ceedc, 0x003fc000}}, + {{0x000d3961, 0x000d3961, 0x000d3961, 0x003fc000}}, + {{0x000d83e6, 0x000d83e6, 0x000d83e6, 0x003fc000}}, + {{0x000dce6b, 0x000dce6b, 0x000dce6b, 0x003fc000}}, + {{0x000e18f0, 0x000e18f0, 0x000e18f0, 0x003fc000}}, + {{0x000e6375, 0x000e6375, 0x000e6375, 0x003fc000}}, + {{0x000eadfa, 0x000eadfa, 0x000eadfa, 0x003fc000}}, + {{0x000ef87f, 0x000ef87f, 0x000ef87f, 0x003fc000}}, + {{0x000f4304, 0x000f4304, 0x000f4304, 0x003fc000}}, + {{0x000f8d89, 0x000f8d89, 0x000f8d89, 0x003fc000}}, + {{0x000fd80e, 0x000fd80e, 0x000fd80e, 0x003fc000}}, + {{0x00102293, 0x00102293, 0x00102293, 0x003fc000}}, + {{0x00106d18, 0x00106d18, 0x00106d18, 0x003fc000}}, + {{0x0010b79d, 0x0010b79d, 0x0010b79d, 0x003fc000}}, + {{0x00110222, 0x00110222, 0x00110222, 0x003fc000}}, + {{0x00114ca7, 0x00114ca7, 0x00114ca7, 0x003fc000}}, + {{0x0011972c, 0x0011972c, 0x0011972c, 0x003fc000}}, + {{0x0011e1b1, 0x0011e1b1, 0x0011e1b1, 0x003fc000}}, + {{0x00122c36, 0x00122c36, 0x00122c36, 0x003fc000}}, + {{0x001276bb, 0x001276bb, 0x001276bb, 0x003fc000}}, + {{0x0012c140, 0x0012c140, 0x0012c140, 0x003fc000}}, + {{0x00130bc5, 0x00130bc5, 0x00130bc5, 0x003fc000}}, + {{0x0013564a, 0x0013564a, 0x0013564a, 0x003fc000}}, + {{0x0013a0cf, 0x0013a0cf, 0x0013a0cf, 0x003fc000}}, + {{0x0013eb54, 0x0013eb54, 0x0013eb54, 0x003fc000}}, + {{0x001435d9, 0x001435d9, 0x001435d9, 0x003fc000}}, + {{0x0014805e, 0x0014805e, 0x0014805e, 0x003fc000}}, + {{0x0014cae3, 0x0014cae3, 0x0014cae3, 0x003fc000}}, + {{0x00151568, 0x00151568, 0x00151568, 0x003fc000}}, + {{0x00155fed, 0x00155fed, 0x00155fed, 0x003fc000}}, + {{0x0015aa72, 0x0015aa72, 0x0015aa72, 0x003fc000}}, + {{0x0015f4f7, 0x0015f4f7, 0x0015f4f7, 0x003fc000}}, + {{0x00163f7c, 0x00163f7c, 0x00163f7c, 0x003fc000}}, + {{0x00168a01, 0x00168a01, 0x00168a01, 0x003fc000}}, + {{0x0016d486, 0x0016d486, 0x0016d486, 0x003fc000}}, + {{0x00171f0b, 0x00171f0b, 0x00171f0b, 0x003fc000}}, + {{0x00176990, 0x00176990, 0x00176990, 0x003fc000}}, + {{0x0017b415, 0x0017b415, 0x0017b415, 0x003fc000}}, + {{0x0017fe9a, 0x0017fe9a, 0x0017fe9a, 0x003fc000}}, + {{0x0018491f, 0x0018491f, 0x0018491f, 0x003fc000}}, + {{0x001893a4, 0x001893a4, 0x001893a4, 0x003fc000}}, + {{0x0018de29, 0x0018de29, 0x0018de29, 0x003fc000}}, + {{0x001928ae, 0x001928ae, 0x001928ae, 0x003fc000}}, + {{0x00197333, 0x00197333, 0x00197333, 0x003fc000}}, + {{0x0019bdb8, 0x0019bdb8, 0x0019bdb8, 0x003fc000}}, + {{0x001a083d, 0x001a083d, 0x001a083d, 0x003fc000}}, + {{0x001a52c2, 0x001a52c2, 0x001a52c2, 0x003fc000}}, + {{0x001a9d47, 0x001a9d47, 0x001a9d47, 0x003fc000}}, + {{0x001ae7cc, 0x001ae7cc, 0x001ae7cc, 0x003fc000}}, + {{0x001b3251, 0x001b3251, 0x001b3251, 0x003fc000}}, + {{0x001b7cd6, 0x001b7cd6, 0x001b7cd6, 0x003fc000}}, + {{0x001bc75b, 0x001bc75b, 0x001bc75b, 0x003fc000}}, + {{0x001c11e0, 0x001c11e0, 0x001c11e0, 0x003fc000}}, + {{0x001c5c65, 0x001c5c65, 0x001c5c65, 0x003fc000}}, + {{0x001ca6ea, 0x001ca6ea, 0x001ca6ea, 0x003fc000}}, + {{0x001cf16f, 0x001cf16f, 0x001cf16f, 0x003fc000}}, + {{0x001d3bf4, 0x001d3bf4, 0x001d3bf4, 0x003fc000}}, + {{0x001d8679, 0x001d8679, 0x001d8679, 0x003fc000}}, + {{0x001dd0fe, 0x001dd0fe, 0x001dd0fe, 0x003fc000}}, + {{0x001e1b83, 0x001e1b83, 0x001e1b83, 0x003fc000}}, + {{0x001e6608, 0x001e6608, 0x001e6608, 0x003fc000}}, + {{0x001eb08d, 0x001eb08d, 0x001eb08d, 0x003fc000}}, + {{0x001efb12, 0x001efb12, 0x001efb12, 0x003fc000}}, + {{0x001f4597, 0x001f4597, 0x001f4597, 0x003fc000}}, + {{0x001f901c, 0x001f901c, 0x001f901c, 0x003fc000}}, + {{0x001fdaa1, 0x001fdaa1, 0x001fdaa1, 0x003fc000}}, + {{0x00202526, 0x00202526, 0x00202526, 0x003fc000}}, + {{0x00206fab, 0x00206fab, 0x00206fab, 0x003fc000}}, + {{0x0020ba30, 0x0020ba30, 0x0020ba30, 0x003fc000}}, + {{0x002104b5, 0x002104b5, 0x002104b5, 0x003fc000}}, + {{0x00214f3a, 0x00214f3a, 0x00214f3a, 0x003fc000}}, + {{0x002199bf, 0x002199bf, 0x002199bf, 0x003fc000}}, + {{0x0021e444, 0x0021e444, 0x0021e444, 0x003fc000}}, + {{0x00222ec9, 0x00222ec9, 0x00222ec9, 0x003fc000}}, + {{0x0022794e, 0x0022794e, 0x0022794e, 0x003fc000}}, + {{0x0022c3d3, 0x0022c3d3, 0x0022c3d3, 0x003fc000}}, + {{0x00230e58, 0x00230e58, 0x00230e58, 0x003fc000}}, + {{0x002358dd, 0x002358dd, 0x002358dd, 0x003fc000}}, + {{0x0023a362, 0x0023a362, 0x0023a362, 0x003fc000}}, + {{0x0023ede7, 0x0023ede7, 0x0023ede7, 0x003fc000}}, + {{0x0024386c, 0x0024386c, 0x0024386c, 0x003fc000}}, + {{0x002482f1, 0x002482f1, 0x002482f1, 0x003fc000}}, + {{0x0024cd76, 0x0024cd76, 0x0024cd76, 0x003fc000}}, + {{0x002517fb, 0x002517fb, 0x002517fb, 0x003fc000}}, + {{0x00256280, 0x00256280, 0x00256280, 0x003fc000}}, + {{0x0025ad05, 0x0025ad05, 0x0025ad05, 0x003fc000}}, + {{0x0025f78a, 0x0025f78a, 0x0025f78a, 0x003fc000}}, + {{0x0026420f, 0x0026420f, 0x0026420f, 0x003fc000}}, + {{0x00268c94, 0x00268c94, 0x00268c94, 0x003fc000}}, + {{0x0026d719, 0x0026d719, 0x0026d719, 0x003fc000}}, + {{0x0027219e, 0x0027219e, 0x0027219e, 0x003fc000}}, + {{0x00276c23, 0x00276c23, 0x00276c23, 0x003fc000}}, + {{0x0027b6a8, 0x0027b6a8, 0x0027b6a8, 0x003fc000}}, + {{0x0028012d, 0x0028012d, 0x0028012d, 0x003fc000}}, + {{0x00284bb2, 0x00284bb2, 0x00284bb2, 0x003fc000}}, + {{0x00289637, 0x00289637, 0x00289637, 0x003fc000}}, + {{0x0028e0bc, 0x0028e0bc, 0x0028e0bc, 0x003fc000}}, + {{0x00292b41, 0x00292b41, 0x00292b41, 0x003fc000}}, + {{0x002975c6, 0x002975c6, 0x002975c6, 0x003fc000}}, + {{0x0029c04b, 0x0029c04b, 0x0029c04b, 0x003fc000}}, + {{0x002a0ad0, 0x002a0ad0, 0x002a0ad0, 0x003fc000}}, + {{0x002a5555, 0x002a5555, 0x002a5555, 0x003fc000}}, + {{0x002a9fda, 0x002a9fda, 0x002a9fda, 0x003fc000}}, + {{0x002aea5f, 0x002aea5f, 0x002aea5f, 0x003fc000}}, + {{0x002b34e4, 0x002b34e4, 0x002b34e4, 0x003fc000}}, + {{0x002b7f69, 0x002b7f69, 0x002b7f69, 0x003fc000}}, + {{0x002bc9ee, 0x002bc9ee, 0x002bc9ee, 0x003fc000}}, + {{0x002c1473, 0x002c1473, 0x002c1473, 0x003fc000}}, + {{0x002c5ef8, 0x002c5ef8, 0x002c5ef8, 0x003fc000}}, + {{0x002ca97d, 0x002ca97d, 0x002ca97d, 0x003fc000}}, + {{0x002cf402, 0x002cf402, 0x002cf402, 0x003fc000}}, + {{0x002d3e87, 0x002d3e87, 0x002d3e87, 0x003fc000}}, + {{0x002d890c, 0x002d890c, 0x002d890c, 0x003fc000}}, + {{0x002dd391, 0x002dd391, 0x002dd391, 0x003fc000}}, + {{0x002e1e16, 0x002e1e16, 0x002e1e16, 0x003fc000}}, + {{0x002e689b, 0x002e689b, 0x002e689b, 0x003fc000}}, + {{0x002eb320, 0x002eb320, 0x002eb320, 0x003fc000}}, + {{0x002efda5, 0x002efda5, 0x002efda5, 0x003fc000}}, + {{0x002f482a, 0x002f482a, 0x002f482a, 0x003fc000}}, + {{0x002f92af, 0x002f92af, 0x002f92af, 0x003fc000}}, + {{0x002fdd34, 0x002fdd34, 0x002fdd34, 0x003fc000}}, + {{0x003027b9, 0x003027b9, 0x003027b9, 0x003fc000}}, + {{0x0030723e, 0x0030723e, 0x0030723e, 0x003fc000}}, + {{0x0030bcc3, 0x0030bcc3, 0x0030bcc3, 0x003fc000}}, + {{0x00310748, 0x00310748, 0x00310748, 0x003fc000}}, + {{0x003151cd, 0x003151cd, 0x003151cd, 0x003fc000}}, + {{0x00319c52, 0x00319c52, 0x00319c52, 0x003fc000}}, + {{0x0031e6d7, 0x0031e6d7, 0x0031e6d7, 0x003fc000}}, + {{0x0032315c, 0x0032315c, 0x0032315c, 0x003fc000}}, + {{0x00327be1, 0x00327be1, 0x00327be1, 0x003fc000}}, + {{0x0032c666, 0x0032c666, 0x0032c666, 0x003fc000}}, + {{0x003310eb, 0x003310eb, 0x003310eb, 0x003fc000}}, + {{0x00335b70, 0x00335b70, 0x00335b70, 0x003fc000}}, + {{0x0033a5f5, 0x0033a5f5, 0x0033a5f5, 0x003fc000}}, + {{0x0033f07a, 0x0033f07a, 0x0033f07a, 0x003fc000}}, + {{0x00343aff, 0x00343aff, 0x00343aff, 0x003fc000}}, + {{0x00348584, 0x00348584, 0x00348584, 0x003fc000}}, + {{0x0034d009, 0x0034d009, 0x0034d009, 0x003fc000}}, + {{0x00351a8e, 0x00351a8e, 0x00351a8e, 0x003fc000}}, + {{0x00356513, 0x00356513, 0x00356513, 0x003fc000}}, + {{0x0035af98, 0x0035af98, 0x0035af98, 0x003fc000}}, + {{0x0035fa1d, 0x0035fa1d, 0x0035fa1d, 0x003fc000}}, + {{0x003644a2, 0x003644a2, 0x003644a2, 0x003fc000}}, + {{0x00368f27, 0x00368f27, 0x00368f27, 0x003fc000}}, + {{0x0036d9ac, 0x0036d9ac, 0x0036d9ac, 0x003fc000}}, + {{0x00372431, 0x00372431, 0x00372431, 0x003fc000}}, + {{0x00376eb6, 0x00376eb6, 0x00376eb6, 0x003fc000}}, + {{0x0037b93b, 0x0037b93b, 0x0037b93b, 0x003fc000}}, + {{0x003803c0, 0x003803c0, 0x003803c0, 0x003fc000}}, + {{0x00384e45, 0x00384e45, 0x00384e45, 0x003fc000}}, + {{0x003898ca, 0x003898ca, 0x003898ca, 0x003fc000}}, + {{0x0038e34f, 0x0038e34f, 0x0038e34f, 0x003fc000}}, + {{0x00392dd4, 0x00392dd4, 0x00392dd4, 0x003fc000}}, + {{0x00397859, 0x00397859, 0x00397859, 0x003fc000}}, + {{0x0039c2de, 0x0039c2de, 0x0039c2de, 0x003fc000}}, + {{0x003a0d63, 0x003a0d63, 0x003a0d63, 0x003fc000}}, + {{0x003a57e8, 0x003a57e8, 0x003a57e8, 0x003fc000}}, + {{0x003aa26d, 0x003aa26d, 0x003aa26d, 0x003fc000}}, + {{0x003aecf2, 0x003aecf2, 0x003aecf2, 0x003fc000}}, + {{0x003b3777, 0x003b3777, 0x003b3777, 0x003fc000}}, + {{0x003b81fc, 0x003b81fc, 0x003b81fc, 0x003fc000}}, + {{0x003bcc81, 0x003bcc81, 0x003bcc81, 0x003fc000}}, + {{0x003c1706, 0x003c1706, 0x003c1706, 0x003fc000}}, + {{0x003c618b, 0x003c618b, 0x003c618b, 0x003fc000}}, + {{0x003cac10, 0x003cac10, 0x003cac10, 0x003fc000}}, + {{0x003cf695, 0x003cf695, 0x003cf695, 0x003fc000}}, + {{0x003d411a, 0x003d411a, 0x003d411a, 0x003fc000}}, + {{0x003d8b9f, 0x003d8b9f, 0x003d8b9f, 0x003fc000}}, + {{0x003dd624, 0x003dd624, 0x003dd624, 0x003fc000}}, + {{0x003e20a9, 0x003e20a9, 0x003e20a9, 0x003fc000}}, + {{0x003e6b2e, 0x003e6b2e, 0x003e6b2e, 0x003fc000}}, + {{0x003eb5b3, 0x003eb5b3, 0x003eb5b3, 0x003fc000}}, + {{0x003f0038, 0x003f0038, 0x003f0038, 0x003fc000}}, + {{0x003f4abd, 0x003f4abd, 0x003f4abd, 0x003fc000}}, + {{0x003f9542, 0x003f9542, 0x003f9542, 0x003fc000}}, + {{0x003fdfc7, 0x003fdfc7, 0x003fdfc7, 0x003fc000}}, + {{0x00402a4c, 0x00402a4c, 0x00402a4c, 0x003fc000}}, + {{0x004074d1, 0x004074d1, 0x004074d1, 0x003fc000}}, + {{0x0040bf56, 0x0040bf56, 0x0040bf56, 0x003fc000}}, + {{0x004109db, 0x004109db, 0x004109db, 0x003fc000}}, + {{0x00415460, 0x00415460, 0x00415460, 0x003fc000}}, + {{0x00419ee5, 0x00419ee5, 0x00419ee5, 0x003fc000}}, + {{0x0041e96a, 0x0041e96a, 0x0041e96a, 0x003fc000}}, + {{0x004233ef, 0x004233ef, 0x004233ef, 0x003fc000}}, + {{0x00427e74, 0x00427e74, 0x00427e74, 0x003fc000}}, + {{0x0042c8f9, 0x0042c8f9, 0x0042c8f9, 0x003fc000}}, + {{0x0043137e, 0x0043137e, 0x0043137e, 0x003fc000}}, + {{0x00435e03, 0x00435e03, 0x00435e03, 0x003fc000}}, + {{0x0043a888, 0x0043a888, 0x0043a888, 0x003fc000}}, + {{0x0043f30d, 0x0043f30d, 0x0043f30d, 0x003fc000}}, + {{0x00443d92, 0x00443d92, 0x00443d92, 0x003fc000}}, + {{0x00448817, 0x00448817, 0x00448817, 0x003fc000}}, + {{0x0044d29c, 0x0044d29c, 0x0044d29c, 0x003fc000}}, + {{0x00451d21, 0x00451d21, 0x00451d21, 0x003fc000}}, + {{0x004567a6, 0x004567a6, 0x004567a6, 0x003fc000}}, + {{0x0045b22b, 0x0045b22b, 0x0045b22b, 0x003fc000}} +}; + +static const VP8kCstSSE2 VP8kUtoRGBA[256] = { + {{0, 0x000c8980, 0xffbf7300, 0}}, {{0, 0x000c706d, 0xffbff41a, 0}}, + {{0, 0x000c575a, 0xffc07534, 0}}, {{0, 0x000c3e47, 0xffc0f64e, 0}}, + {{0, 0x000c2534, 0xffc17768, 0}}, {{0, 0x000c0c21, 0xffc1f882, 0}}, + {{0, 0x000bf30e, 0xffc2799c, 0}}, {{0, 0x000bd9fb, 0xffc2fab6, 0}}, + {{0, 0x000bc0e8, 0xffc37bd0, 0}}, {{0, 0x000ba7d5, 0xffc3fcea, 0}}, + {{0, 0x000b8ec2, 0xffc47e04, 0}}, {{0, 0x000b75af, 0xffc4ff1e, 0}}, + {{0, 0x000b5c9c, 0xffc58038, 0}}, {{0, 0x000b4389, 0xffc60152, 0}}, + {{0, 0x000b2a76, 0xffc6826c, 0}}, {{0, 0x000b1163, 0xffc70386, 0}}, + {{0, 0x000af850, 0xffc784a0, 0}}, {{0, 0x000adf3d, 0xffc805ba, 0}}, + {{0, 0x000ac62a, 0xffc886d4, 0}}, {{0, 0x000aad17, 0xffc907ee, 0}}, + {{0, 0x000a9404, 0xffc98908, 0}}, {{0, 0x000a7af1, 0xffca0a22, 0}}, + {{0, 0x000a61de, 0xffca8b3c, 0}}, {{0, 0x000a48cb, 0xffcb0c56, 0}}, + {{0, 0x000a2fb8, 0xffcb8d70, 0}}, {{0, 0x000a16a5, 0xffcc0e8a, 0}}, + {{0, 0x0009fd92, 0xffcc8fa4, 0}}, {{0, 0x0009e47f, 0xffcd10be, 0}}, + {{0, 0x0009cb6c, 0xffcd91d8, 0}}, {{0, 0x0009b259, 0xffce12f2, 0}}, + {{0, 0x00099946, 0xffce940c, 0}}, {{0, 0x00098033, 0xffcf1526, 0}}, + {{0, 0x00096720, 0xffcf9640, 0}}, {{0, 0x00094e0d, 0xffd0175a, 0}}, + {{0, 0x000934fa, 0xffd09874, 0}}, {{0, 0x00091be7, 0xffd1198e, 0}}, + {{0, 0x000902d4, 0xffd19aa8, 0}}, {{0, 0x0008e9c1, 0xffd21bc2, 0}}, + {{0, 0x0008d0ae, 0xffd29cdc, 0}}, {{0, 0x0008b79b, 0xffd31df6, 0}}, + {{0, 0x00089e88, 0xffd39f10, 0}}, {{0, 0x00088575, 0xffd4202a, 0}}, + {{0, 0x00086c62, 0xffd4a144, 0}}, {{0, 0x0008534f, 0xffd5225e, 0}}, + {{0, 0x00083a3c, 0xffd5a378, 0}}, {{0, 0x00082129, 0xffd62492, 0}}, + {{0, 0x00080816, 0xffd6a5ac, 0}}, {{0, 0x0007ef03, 0xffd726c6, 0}}, + {{0, 0x0007d5f0, 0xffd7a7e0, 0}}, {{0, 0x0007bcdd, 0xffd828fa, 0}}, + {{0, 0x0007a3ca, 0xffd8aa14, 0}}, {{0, 0x00078ab7, 0xffd92b2e, 0}}, + {{0, 0x000771a4, 0xffd9ac48, 0}}, {{0, 0x00075891, 0xffda2d62, 0}}, + {{0, 0x00073f7e, 0xffdaae7c, 0}}, {{0, 0x0007266b, 0xffdb2f96, 0}}, + {{0, 0x00070d58, 0xffdbb0b0, 0}}, {{0, 0x0006f445, 0xffdc31ca, 0}}, + {{0, 0x0006db32, 0xffdcb2e4, 0}}, {{0, 0x0006c21f, 0xffdd33fe, 0}}, + {{0, 0x0006a90c, 0xffddb518, 0}}, {{0, 0x00068ff9, 0xffde3632, 0}}, + {{0, 0x000676e6, 0xffdeb74c, 0}}, {{0, 0x00065dd3, 0xffdf3866, 0}}, + {{0, 0x000644c0, 0xffdfb980, 0}}, {{0, 0x00062bad, 0xffe03a9a, 0}}, + {{0, 0x0006129a, 0xffe0bbb4, 0}}, {{0, 0x0005f987, 0xffe13cce, 0}}, + {{0, 0x0005e074, 0xffe1bde8, 0}}, {{0, 0x0005c761, 0xffe23f02, 0}}, + {{0, 0x0005ae4e, 0xffe2c01c, 0}}, {{0, 0x0005953b, 0xffe34136, 0}}, + {{0, 0x00057c28, 0xffe3c250, 0}}, {{0, 0x00056315, 0xffe4436a, 0}}, + {{0, 0x00054a02, 0xffe4c484, 0}}, {{0, 0x000530ef, 0xffe5459e, 0}}, + {{0, 0x000517dc, 0xffe5c6b8, 0}}, {{0, 0x0004fec9, 0xffe647d2, 0}}, + {{0, 0x0004e5b6, 0xffe6c8ec, 0}}, {{0, 0x0004cca3, 0xffe74a06, 0}}, + {{0, 0x0004b390, 0xffe7cb20, 0}}, {{0, 0x00049a7d, 0xffe84c3a, 0}}, + {{0, 0x0004816a, 0xffe8cd54, 0}}, {{0, 0x00046857, 0xffe94e6e, 0}}, + {{0, 0x00044f44, 0xffe9cf88, 0}}, {{0, 0x00043631, 0xffea50a2, 0}}, + {{0, 0x00041d1e, 0xffead1bc, 0}}, {{0, 0x0004040b, 0xffeb52d6, 0}}, + {{0, 0x0003eaf8, 0xffebd3f0, 0}}, {{0, 0x0003d1e5, 0xffec550a, 0}}, + {{0, 0x0003b8d2, 0xffecd624, 0}}, {{0, 0x00039fbf, 0xffed573e, 0}}, + {{0, 0x000386ac, 0xffedd858, 0}}, {{0, 0x00036d99, 0xffee5972, 0}}, + {{0, 0x00035486, 0xffeeda8c, 0}}, {{0, 0x00033b73, 0xffef5ba6, 0}}, + {{0, 0x00032260, 0xffefdcc0, 0}}, {{0, 0x0003094d, 0xfff05dda, 0}}, + {{0, 0x0002f03a, 0xfff0def4, 0}}, {{0, 0x0002d727, 0xfff1600e, 0}}, + {{0, 0x0002be14, 0xfff1e128, 0}}, {{0, 0x0002a501, 0xfff26242, 0}}, + {{0, 0x00028bee, 0xfff2e35c, 0}}, {{0, 0x000272db, 0xfff36476, 0}}, + {{0, 0x000259c8, 0xfff3e590, 0}}, {{0, 0x000240b5, 0xfff466aa, 0}}, + {{0, 0x000227a2, 0xfff4e7c4, 0}}, {{0, 0x00020e8f, 0xfff568de, 0}}, + {{0, 0x0001f57c, 0xfff5e9f8, 0}}, {{0, 0x0001dc69, 0xfff66b12, 0}}, + {{0, 0x0001c356, 0xfff6ec2c, 0}}, {{0, 0x0001aa43, 0xfff76d46, 0}}, + {{0, 0x00019130, 0xfff7ee60, 0}}, {{0, 0x0001781d, 0xfff86f7a, 0}}, + {{0, 0x00015f0a, 0xfff8f094, 0}}, {{0, 0x000145f7, 0xfff971ae, 0}}, + {{0, 0x00012ce4, 0xfff9f2c8, 0}}, {{0, 0x000113d1, 0xfffa73e2, 0}}, + {{0, 0x0000fabe, 0xfffaf4fc, 0}}, {{0, 0x0000e1ab, 0xfffb7616, 0}}, + {{0, 0x0000c898, 0xfffbf730, 0}}, {{0, 0x0000af85, 0xfffc784a, 0}}, + {{0, 0x00009672, 0xfffcf964, 0}}, {{0, 0x00007d5f, 0xfffd7a7e, 0}}, + {{0, 0x0000644c, 0xfffdfb98, 0}}, {{0, 0x00004b39, 0xfffe7cb2, 0}}, + {{0, 0x00003226, 0xfffefdcc, 0}}, {{0, 0x00001913, 0xffff7ee6, 0}}, + {{0, 0x00000000, 0x00000000, 0}}, {{0, 0xffffe6ed, 0x0000811a, 0}}, + {{0, 0xffffcdda, 0x00010234, 0}}, {{0, 0xffffb4c7, 0x0001834e, 0}}, + {{0, 0xffff9bb4, 0x00020468, 0}}, {{0, 0xffff82a1, 0x00028582, 0}}, + {{0, 0xffff698e, 0x0003069c, 0}}, {{0, 0xffff507b, 0x000387b6, 0}}, + {{0, 0xffff3768, 0x000408d0, 0}}, {{0, 0xffff1e55, 0x000489ea, 0}}, + {{0, 0xffff0542, 0x00050b04, 0}}, {{0, 0xfffeec2f, 0x00058c1e, 0}}, + {{0, 0xfffed31c, 0x00060d38, 0}}, {{0, 0xfffeba09, 0x00068e52, 0}}, + {{0, 0xfffea0f6, 0x00070f6c, 0}}, {{0, 0xfffe87e3, 0x00079086, 0}}, + {{0, 0xfffe6ed0, 0x000811a0, 0}}, {{0, 0xfffe55bd, 0x000892ba, 0}}, + {{0, 0xfffe3caa, 0x000913d4, 0}}, {{0, 0xfffe2397, 0x000994ee, 0}}, + {{0, 0xfffe0a84, 0x000a1608, 0}}, {{0, 0xfffdf171, 0x000a9722, 0}}, + {{0, 0xfffdd85e, 0x000b183c, 0}}, {{0, 0xfffdbf4b, 0x000b9956, 0}}, + {{0, 0xfffda638, 0x000c1a70, 0}}, {{0, 0xfffd8d25, 0x000c9b8a, 0}}, + {{0, 0xfffd7412, 0x000d1ca4, 0}}, {{0, 0xfffd5aff, 0x000d9dbe, 0}}, + {{0, 0xfffd41ec, 0x000e1ed8, 0}}, {{0, 0xfffd28d9, 0x000e9ff2, 0}}, + {{0, 0xfffd0fc6, 0x000f210c, 0}}, {{0, 0xfffcf6b3, 0x000fa226, 0}}, + {{0, 0xfffcdda0, 0x00102340, 0}}, {{0, 0xfffcc48d, 0x0010a45a, 0}}, + {{0, 0xfffcab7a, 0x00112574, 0}}, {{0, 0xfffc9267, 0x0011a68e, 0}}, + {{0, 0xfffc7954, 0x001227a8, 0}}, {{0, 0xfffc6041, 0x0012a8c2, 0}}, + {{0, 0xfffc472e, 0x001329dc, 0}}, {{0, 0xfffc2e1b, 0x0013aaf6, 0}}, + {{0, 0xfffc1508, 0x00142c10, 0}}, {{0, 0xfffbfbf5, 0x0014ad2a, 0}}, + {{0, 0xfffbe2e2, 0x00152e44, 0}}, {{0, 0xfffbc9cf, 0x0015af5e, 0}}, + {{0, 0xfffbb0bc, 0x00163078, 0}}, {{0, 0xfffb97a9, 0x0016b192, 0}}, + {{0, 0xfffb7e96, 0x001732ac, 0}}, {{0, 0xfffb6583, 0x0017b3c6, 0}}, + {{0, 0xfffb4c70, 0x001834e0, 0}}, {{0, 0xfffb335d, 0x0018b5fa, 0}}, + {{0, 0xfffb1a4a, 0x00193714, 0}}, {{0, 0xfffb0137, 0x0019b82e, 0}}, + {{0, 0xfffae824, 0x001a3948, 0}}, {{0, 0xfffacf11, 0x001aba62, 0}}, + {{0, 0xfffab5fe, 0x001b3b7c, 0}}, {{0, 0xfffa9ceb, 0x001bbc96, 0}}, + {{0, 0xfffa83d8, 0x001c3db0, 0}}, {{0, 0xfffa6ac5, 0x001cbeca, 0}}, + {{0, 0xfffa51b2, 0x001d3fe4, 0}}, {{0, 0xfffa389f, 0x001dc0fe, 0}}, + {{0, 0xfffa1f8c, 0x001e4218, 0}}, {{0, 0xfffa0679, 0x001ec332, 0}}, + {{0, 0xfff9ed66, 0x001f444c, 0}}, {{0, 0xfff9d453, 0x001fc566, 0}}, + {{0, 0xfff9bb40, 0x00204680, 0}}, {{0, 0xfff9a22d, 0x0020c79a, 0}}, + {{0, 0xfff9891a, 0x002148b4, 0}}, {{0, 0xfff97007, 0x0021c9ce, 0}}, + {{0, 0xfff956f4, 0x00224ae8, 0}}, {{0, 0xfff93de1, 0x0022cc02, 0}}, + {{0, 0xfff924ce, 0x00234d1c, 0}}, {{0, 0xfff90bbb, 0x0023ce36, 0}}, + {{0, 0xfff8f2a8, 0x00244f50, 0}}, {{0, 0xfff8d995, 0x0024d06a, 0}}, + {{0, 0xfff8c082, 0x00255184, 0}}, {{0, 0xfff8a76f, 0x0025d29e, 0}}, + {{0, 0xfff88e5c, 0x002653b8, 0}}, {{0, 0xfff87549, 0x0026d4d2, 0}}, + {{0, 0xfff85c36, 0x002755ec, 0}}, {{0, 0xfff84323, 0x0027d706, 0}}, + {{0, 0xfff82a10, 0x00285820, 0}}, {{0, 0xfff810fd, 0x0028d93a, 0}}, + {{0, 0xfff7f7ea, 0x00295a54, 0}}, {{0, 0xfff7ded7, 0x0029db6e, 0}}, + {{0, 0xfff7c5c4, 0x002a5c88, 0}}, {{0, 0xfff7acb1, 0x002adda2, 0}}, + {{0, 0xfff7939e, 0x002b5ebc, 0}}, {{0, 0xfff77a8b, 0x002bdfd6, 0}}, + {{0, 0xfff76178, 0x002c60f0, 0}}, {{0, 0xfff74865, 0x002ce20a, 0}}, + {{0, 0xfff72f52, 0x002d6324, 0}}, {{0, 0xfff7163f, 0x002de43e, 0}}, + {{0, 0xfff6fd2c, 0x002e6558, 0}}, {{0, 0xfff6e419, 0x002ee672, 0}}, + {{0, 0xfff6cb06, 0x002f678c, 0}}, {{0, 0xfff6b1f3, 0x002fe8a6, 0}}, + {{0, 0xfff698e0, 0x003069c0, 0}}, {{0, 0xfff67fcd, 0x0030eada, 0}}, + {{0, 0xfff666ba, 0x00316bf4, 0}}, {{0, 0xfff64da7, 0x0031ed0e, 0}}, + {{0, 0xfff63494, 0x00326e28, 0}}, {{0, 0xfff61b81, 0x0032ef42, 0}}, + {{0, 0xfff6026e, 0x0033705c, 0}}, {{0, 0xfff5e95b, 0x0033f176, 0}}, + {{0, 0xfff5d048, 0x00347290, 0}}, {{0, 0xfff5b735, 0x0034f3aa, 0}}, + {{0, 0xfff59e22, 0x003574c4, 0}}, {{0, 0xfff5850f, 0x0035f5de, 0}}, + {{0, 0xfff56bfc, 0x003676f8, 0}}, {{0, 0xfff552e9, 0x0036f812, 0}}, + {{0, 0xfff539d6, 0x0037792c, 0}}, {{0, 0xfff520c3, 0x0037fa46, 0}}, + {{0, 0xfff507b0, 0x00387b60, 0}}, {{0, 0xfff4ee9d, 0x0038fc7a, 0}}, + {{0, 0xfff4d58a, 0x00397d94, 0}}, {{0, 0xfff4bc77, 0x0039feae, 0}}, + {{0, 0xfff4a364, 0x003a7fc8, 0}}, {{0, 0xfff48a51, 0x003b00e2, 0}}, + {{0, 0xfff4713e, 0x003b81fc, 0}}, {{0, 0xfff4582b, 0x003c0316, 0}}, + {{0, 0xfff43f18, 0x003c8430, 0}}, {{0, 0xfff42605, 0x003d054a, 0}}, + {{0, 0xfff40cf2, 0x003d8664, 0}}, {{0, 0xfff3f3df, 0x003e077e, 0}}, + {{0, 0xfff3dacc, 0x003e8898, 0}}, {{0, 0xfff3c1b9, 0x003f09b2, 0}}, + {{0, 0xfff3a8a6, 0x003f8acc, 0}}, {{0, 0xfff38f93, 0x00400be6, 0}} +}; + +static VP8kCstSSE2 VP8kVtoRGBA[256] = { + {{0xffcced80, 0x001a0400, 0, 0}}, {{0xffcd53a5, 0x0019cff8, 0, 0}}, + {{0xffcdb9ca, 0x00199bf0, 0, 0}}, {{0xffce1fef, 0x001967e8, 0, 0}}, + {{0xffce8614, 0x001933e0, 0, 0}}, {{0xffceec39, 0x0018ffd8, 0, 0}}, + {{0xffcf525e, 0x0018cbd0, 0, 0}}, {{0xffcfb883, 0x001897c8, 0, 0}}, + {{0xffd01ea8, 0x001863c0, 0, 0}}, {{0xffd084cd, 0x00182fb8, 0, 0}}, + {{0xffd0eaf2, 0x0017fbb0, 0, 0}}, {{0xffd15117, 0x0017c7a8, 0, 0}}, + {{0xffd1b73c, 0x001793a0, 0, 0}}, {{0xffd21d61, 0x00175f98, 0, 0}}, + {{0xffd28386, 0x00172b90, 0, 0}}, {{0xffd2e9ab, 0x0016f788, 0, 0}}, + {{0xffd34fd0, 0x0016c380, 0, 0}}, {{0xffd3b5f5, 0x00168f78, 0, 0}}, + {{0xffd41c1a, 0x00165b70, 0, 0}}, {{0xffd4823f, 0x00162768, 0, 0}}, + {{0xffd4e864, 0x0015f360, 0, 0}}, {{0xffd54e89, 0x0015bf58, 0, 0}}, + {{0xffd5b4ae, 0x00158b50, 0, 0}}, {{0xffd61ad3, 0x00155748, 0, 0}}, + {{0xffd680f8, 0x00152340, 0, 0}}, {{0xffd6e71d, 0x0014ef38, 0, 0}}, + {{0xffd74d42, 0x0014bb30, 0, 0}}, {{0xffd7b367, 0x00148728, 0, 0}}, + {{0xffd8198c, 0x00145320, 0, 0}}, {{0xffd87fb1, 0x00141f18, 0, 0}}, + {{0xffd8e5d6, 0x0013eb10, 0, 0}}, {{0xffd94bfb, 0x0013b708, 0, 0}}, + {{0xffd9b220, 0x00138300, 0, 0}}, {{0xffda1845, 0x00134ef8, 0, 0}}, + {{0xffda7e6a, 0x00131af0, 0, 0}}, {{0xffdae48f, 0x0012e6e8, 0, 0}}, + {{0xffdb4ab4, 0x0012b2e0, 0, 0}}, {{0xffdbb0d9, 0x00127ed8, 0, 0}}, + {{0xffdc16fe, 0x00124ad0, 0, 0}}, {{0xffdc7d23, 0x001216c8, 0, 0}}, + {{0xffdce348, 0x0011e2c0, 0, 0}}, {{0xffdd496d, 0x0011aeb8, 0, 0}}, + {{0xffddaf92, 0x00117ab0, 0, 0}}, {{0xffde15b7, 0x001146a8, 0, 0}}, + {{0xffde7bdc, 0x001112a0, 0, 0}}, {{0xffdee201, 0x0010de98, 0, 0}}, + {{0xffdf4826, 0x0010aa90, 0, 0}}, {{0xffdfae4b, 0x00107688, 0, 0}}, + {{0xffe01470, 0x00104280, 0, 0}}, {{0xffe07a95, 0x00100e78, 0, 0}}, + {{0xffe0e0ba, 0x000fda70, 0, 0}}, {{0xffe146df, 0x000fa668, 0, 0}}, + {{0xffe1ad04, 0x000f7260, 0, 0}}, {{0xffe21329, 0x000f3e58, 0, 0}}, + {{0xffe2794e, 0x000f0a50, 0, 0}}, {{0xffe2df73, 0x000ed648, 0, 0}}, + {{0xffe34598, 0x000ea240, 0, 0}}, {{0xffe3abbd, 0x000e6e38, 0, 0}}, + {{0xffe411e2, 0x000e3a30, 0, 0}}, {{0xffe47807, 0x000e0628, 0, 0}}, + {{0xffe4de2c, 0x000dd220, 0, 0}}, {{0xffe54451, 0x000d9e18, 0, 0}}, + {{0xffe5aa76, 0x000d6a10, 0, 0}}, {{0xffe6109b, 0x000d3608, 0, 0}}, + {{0xffe676c0, 0x000d0200, 0, 0}}, {{0xffe6dce5, 0x000ccdf8, 0, 0}}, + {{0xffe7430a, 0x000c99f0, 0, 0}}, {{0xffe7a92f, 0x000c65e8, 0, 0}}, + {{0xffe80f54, 0x000c31e0, 0, 0}}, {{0xffe87579, 0x000bfdd8, 0, 0}}, + {{0xffe8db9e, 0x000bc9d0, 0, 0}}, {{0xffe941c3, 0x000b95c8, 0, 0}}, + {{0xffe9a7e8, 0x000b61c0, 0, 0}}, {{0xffea0e0d, 0x000b2db8, 0, 0}}, + {{0xffea7432, 0x000af9b0, 0, 0}}, {{0xffeada57, 0x000ac5a8, 0, 0}}, + {{0xffeb407c, 0x000a91a0, 0, 0}}, {{0xffeba6a1, 0x000a5d98, 0, 0}}, + {{0xffec0cc6, 0x000a2990, 0, 0}}, {{0xffec72eb, 0x0009f588, 0, 0}}, + {{0xffecd910, 0x0009c180, 0, 0}}, {{0xffed3f35, 0x00098d78, 0, 0}}, + {{0xffeda55a, 0x00095970, 0, 0}}, {{0xffee0b7f, 0x00092568, 0, 0}}, + {{0xffee71a4, 0x0008f160, 0, 0}}, {{0xffeed7c9, 0x0008bd58, 0, 0}}, + {{0xffef3dee, 0x00088950, 0, 0}}, {{0xffefa413, 0x00085548, 0, 0}}, + {{0xfff00a38, 0x00082140, 0, 0}}, {{0xfff0705d, 0x0007ed38, 0, 0}}, + {{0xfff0d682, 0x0007b930, 0, 0}}, {{0xfff13ca7, 0x00078528, 0, 0}}, + {{0xfff1a2cc, 0x00075120, 0, 0}}, {{0xfff208f1, 0x00071d18, 0, 0}}, + {{0xfff26f16, 0x0006e910, 0, 0}}, {{0xfff2d53b, 0x0006b508, 0, 0}}, + {{0xfff33b60, 0x00068100, 0, 0}}, {{0xfff3a185, 0x00064cf8, 0, 0}}, + {{0xfff407aa, 0x000618f0, 0, 0}}, {{0xfff46dcf, 0x0005e4e8, 0, 0}}, + {{0xfff4d3f4, 0x0005b0e0, 0, 0}}, {{0xfff53a19, 0x00057cd8, 0, 0}}, + {{0xfff5a03e, 0x000548d0, 0, 0}}, {{0xfff60663, 0x000514c8, 0, 0}}, + {{0xfff66c88, 0x0004e0c0, 0, 0}}, {{0xfff6d2ad, 0x0004acb8, 0, 0}}, + {{0xfff738d2, 0x000478b0, 0, 0}}, {{0xfff79ef7, 0x000444a8, 0, 0}}, + {{0xfff8051c, 0x000410a0, 0, 0}}, {{0xfff86b41, 0x0003dc98, 0, 0}}, + {{0xfff8d166, 0x0003a890, 0, 0}}, {{0xfff9378b, 0x00037488, 0, 0}}, + {{0xfff99db0, 0x00034080, 0, 0}}, {{0xfffa03d5, 0x00030c78, 0, 0}}, + {{0xfffa69fa, 0x0002d870, 0, 0}}, {{0xfffad01f, 0x0002a468, 0, 0}}, + {{0xfffb3644, 0x00027060, 0, 0}}, {{0xfffb9c69, 0x00023c58, 0, 0}}, + {{0xfffc028e, 0x00020850, 0, 0}}, {{0xfffc68b3, 0x0001d448, 0, 0}}, + {{0xfffcced8, 0x0001a040, 0, 0}}, {{0xfffd34fd, 0x00016c38, 0, 0}}, + {{0xfffd9b22, 0x00013830, 0, 0}}, {{0xfffe0147, 0x00010428, 0, 0}}, + {{0xfffe676c, 0x0000d020, 0, 0}}, {{0xfffecd91, 0x00009c18, 0, 0}}, + {{0xffff33b6, 0x00006810, 0, 0}}, {{0xffff99db, 0x00003408, 0, 0}}, + {{0x00000000, 0x00000000, 0, 0}}, {{0x00006625, 0xffffcbf8, 0, 0}}, + {{0x0000cc4a, 0xffff97f0, 0, 0}}, {{0x0001326f, 0xffff63e8, 0, 0}}, + {{0x00019894, 0xffff2fe0, 0, 0}}, {{0x0001feb9, 0xfffefbd8, 0, 0}}, + {{0x000264de, 0xfffec7d0, 0, 0}}, {{0x0002cb03, 0xfffe93c8, 0, 0}}, + {{0x00033128, 0xfffe5fc0, 0, 0}}, {{0x0003974d, 0xfffe2bb8, 0, 0}}, + {{0x0003fd72, 0xfffdf7b0, 0, 0}}, {{0x00046397, 0xfffdc3a8, 0, 0}}, + {{0x0004c9bc, 0xfffd8fa0, 0, 0}}, {{0x00052fe1, 0xfffd5b98, 0, 0}}, + {{0x00059606, 0xfffd2790, 0, 0}}, {{0x0005fc2b, 0xfffcf388, 0, 0}}, + {{0x00066250, 0xfffcbf80, 0, 0}}, {{0x0006c875, 0xfffc8b78, 0, 0}}, + {{0x00072e9a, 0xfffc5770, 0, 0}}, {{0x000794bf, 0xfffc2368, 0, 0}}, + {{0x0007fae4, 0xfffbef60, 0, 0}}, {{0x00086109, 0xfffbbb58, 0, 0}}, + {{0x0008c72e, 0xfffb8750, 0, 0}}, {{0x00092d53, 0xfffb5348, 0, 0}}, + {{0x00099378, 0xfffb1f40, 0, 0}}, {{0x0009f99d, 0xfffaeb38, 0, 0}}, + {{0x000a5fc2, 0xfffab730, 0, 0}}, {{0x000ac5e7, 0xfffa8328, 0, 0}}, + {{0x000b2c0c, 0xfffa4f20, 0, 0}}, {{0x000b9231, 0xfffa1b18, 0, 0}}, + {{0x000bf856, 0xfff9e710, 0, 0}}, {{0x000c5e7b, 0xfff9b308, 0, 0}}, + {{0x000cc4a0, 0xfff97f00, 0, 0}}, {{0x000d2ac5, 0xfff94af8, 0, 0}}, + {{0x000d90ea, 0xfff916f0, 0, 0}}, {{0x000df70f, 0xfff8e2e8, 0, 0}}, + {{0x000e5d34, 0xfff8aee0, 0, 0}}, {{0x000ec359, 0xfff87ad8, 0, 0}}, + {{0x000f297e, 0xfff846d0, 0, 0}}, {{0x000f8fa3, 0xfff812c8, 0, 0}}, + {{0x000ff5c8, 0xfff7dec0, 0, 0}}, {{0x00105bed, 0xfff7aab8, 0, 0}}, + {{0x0010c212, 0xfff776b0, 0, 0}}, {{0x00112837, 0xfff742a8, 0, 0}}, + {{0x00118e5c, 0xfff70ea0, 0, 0}}, {{0x0011f481, 0xfff6da98, 0, 0}}, + {{0x00125aa6, 0xfff6a690, 0, 0}}, {{0x0012c0cb, 0xfff67288, 0, 0}}, + {{0x001326f0, 0xfff63e80, 0, 0}}, {{0x00138d15, 0xfff60a78, 0, 0}}, + {{0x0013f33a, 0xfff5d670, 0, 0}}, {{0x0014595f, 0xfff5a268, 0, 0}}, + {{0x0014bf84, 0xfff56e60, 0, 0}}, {{0x001525a9, 0xfff53a58, 0, 0}}, + {{0x00158bce, 0xfff50650, 0, 0}}, {{0x0015f1f3, 0xfff4d248, 0, 0}}, + {{0x00165818, 0xfff49e40, 0, 0}}, {{0x0016be3d, 0xfff46a38, 0, 0}}, + {{0x00172462, 0xfff43630, 0, 0}}, {{0x00178a87, 0xfff40228, 0, 0}}, + {{0x0017f0ac, 0xfff3ce20, 0, 0}}, {{0x001856d1, 0xfff39a18, 0, 0}}, + {{0x0018bcf6, 0xfff36610, 0, 0}}, {{0x0019231b, 0xfff33208, 0, 0}}, + {{0x00198940, 0xfff2fe00, 0, 0}}, {{0x0019ef65, 0xfff2c9f8, 0, 0}}, + {{0x001a558a, 0xfff295f0, 0, 0}}, {{0x001abbaf, 0xfff261e8, 0, 0}}, + {{0x001b21d4, 0xfff22de0, 0, 0}}, {{0x001b87f9, 0xfff1f9d8, 0, 0}}, + {{0x001bee1e, 0xfff1c5d0, 0, 0}}, {{0x001c5443, 0xfff191c8, 0, 0}}, + {{0x001cba68, 0xfff15dc0, 0, 0}}, {{0x001d208d, 0xfff129b8, 0, 0}}, + {{0x001d86b2, 0xfff0f5b0, 0, 0}}, {{0x001decd7, 0xfff0c1a8, 0, 0}}, + {{0x001e52fc, 0xfff08da0, 0, 0}}, {{0x001eb921, 0xfff05998, 0, 0}}, + {{0x001f1f46, 0xfff02590, 0, 0}}, {{0x001f856b, 0xffeff188, 0, 0}}, + {{0x001feb90, 0xffefbd80, 0, 0}}, {{0x002051b5, 0xffef8978, 0, 0}}, + {{0x0020b7da, 0xffef5570, 0, 0}}, {{0x00211dff, 0xffef2168, 0, 0}}, + {{0x00218424, 0xffeeed60, 0, 0}}, {{0x0021ea49, 0xffeeb958, 0, 0}}, + {{0x0022506e, 0xffee8550, 0, 0}}, {{0x0022b693, 0xffee5148, 0, 0}}, + {{0x00231cb8, 0xffee1d40, 0, 0}}, {{0x002382dd, 0xffede938, 0, 0}}, + {{0x0023e902, 0xffedb530, 0, 0}}, {{0x00244f27, 0xffed8128, 0, 0}}, + {{0x0024b54c, 0xffed4d20, 0, 0}}, {{0x00251b71, 0xffed1918, 0, 0}}, + {{0x00258196, 0xffece510, 0, 0}}, {{0x0025e7bb, 0xffecb108, 0, 0}}, + {{0x00264de0, 0xffec7d00, 0, 0}}, {{0x0026b405, 0xffec48f8, 0, 0}}, + {{0x00271a2a, 0xffec14f0, 0, 0}}, {{0x0027804f, 0xffebe0e8, 0, 0}}, + {{0x0027e674, 0xffebace0, 0, 0}}, {{0x00284c99, 0xffeb78d8, 0, 0}}, + {{0x0028b2be, 0xffeb44d0, 0, 0}}, {{0x002918e3, 0xffeb10c8, 0, 0}}, + {{0x00297f08, 0xffeadcc0, 0, 0}}, {{0x0029e52d, 0xffeaa8b8, 0, 0}}, + {{0x002a4b52, 0xffea74b0, 0, 0}}, {{0x002ab177, 0xffea40a8, 0, 0}}, + {{0x002b179c, 0xffea0ca0, 0, 0}}, {{0x002b7dc1, 0xffe9d898, 0, 0}}, + {{0x002be3e6, 0xffe9a490, 0, 0}}, {{0x002c4a0b, 0xffe97088, 0, 0}}, + {{0x002cb030, 0xffe93c80, 0, 0}}, {{0x002d1655, 0xffe90878, 0, 0}}, + {{0x002d7c7a, 0xffe8d470, 0, 0}}, {{0x002de29f, 0xffe8a068, 0, 0}}, + {{0x002e48c4, 0xffe86c60, 0, 0}}, {{0x002eaee9, 0xffe83858, 0, 0}}, + {{0x002f150e, 0xffe80450, 0, 0}}, {{0x002f7b33, 0xffe7d048, 0, 0}}, + {{0x002fe158, 0xffe79c40, 0, 0}}, {{0x0030477d, 0xffe76838, 0, 0}}, + {{0x0030ada2, 0xffe73430, 0, 0}}, {{0x003113c7, 0xffe70028, 0, 0}}, + {{0x003179ec, 0xffe6cc20, 0, 0}}, {{0x0031e011, 0xffe69818, 0, 0}}, + {{0x00324636, 0xffe66410, 0, 0}}, {{0x0032ac5b, 0xffe63008, 0, 0}} +}; diff --git a/thirdparty/libwebp/enc/alpha.c b/thirdparty/libwebp/enc/alpha.c new file mode 100644 index 0000000000..03e3ad07f5 --- /dev/null +++ b/thirdparty/libwebp/enc/alpha.c @@ -0,0 +1,433 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> + +#include "./vp8enci.h" +#include "../dsp/dsp.h" +#include "../utils/filters.h" +#include "../utils/quant_levels.h" +#include "../utils/utils.h" +#include "../webp/format_constants.h" + +// ----------------------------------------------------------------------------- +// 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 +// WebPSafeFree(*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 + VP8LBitWriter* const bw, + WebPAuxStats* const stats) { + int ok = 0; + WebPConfig config; + WebPPicture picture; + + 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. + WebPDispatchAlphaToGreen(data, width, picture.width, picture.height, + picture.argb, picture.argb_stride); + + WebPConfigInit(&config); + config.lossless = 1; + // Enable exact, or it would alter RGB values of transparent alpha, which is + // normally OK but not here since we are not encoding the input image but an + // internal encoding-related image containing necessary exact information in + // RGB channels. + config.exact = 1; + config.method = effort_level; // impact is very small + // 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); + + // TODO(urvang): Temporary fix to avoid generating images that trigger + // a decoder bug related to alpha with color cache. + // See: https://code.google.com/p/webp/issues/detail?id=239 + // Need to re-enable this later. + ok = (VP8LEncodeStream(&config, &picture, bw, 0 /*use_cache*/) == VP8_ENC_OK); + WebPPictureFree(&picture); + ok = ok && !bw->error_; + if (!ok) { + VP8LBitWriterWipeOut(bw); + return 0; + } + 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, + FilterTrial* result) { + int ok = 0; + const uint8_t* alpha_src; + WebPFilterFunc filter_func; + uint8_t header; + 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); + assert(method >= ALPHA_NO_COMPRESSION); + assert(method <= ALPHA_LOSSLESS_COMPRESSION); + assert(sizeof(header) == ALPHA_HEADER_LEN); + + filter_func = WebPFilters[filter]; + 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) { + 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; +} + +// ----------------------------------------------------------------------------- + +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, + 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; + } + + 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). + 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 + // 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) { + 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; + } + } + + 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 VP8EncStartAlpha(VP8Encoder* const enc) { + if (enc->has_alpha_) { + 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 + } + } + 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 + } + } + return WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_); +} + +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; +} diff --git a/thirdparty/libwebp/enc/analysis.c b/thirdparty/libwebp/enc/analysis.c new file mode 100644 index 0000000000..b55128fd48 --- /dev/null +++ b/thirdparty/libwebp/enc/analysis.c @@ -0,0 +1,501 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// 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" + +#define MAX_ITERS_K_MEANS 6 + +//------------------------------------------------------------------------------ +// 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(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; + break; + } + } + 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]; + } + } + WebPSafeFree(tmp); +} + +//------------------------------------------------------------------------------ +// set segment susceptibility alpha_ / beta_ + +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); + } +} + +//------------------------------------------------------------------------------ +// 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[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[MAX_ALPHA + 1]; + int a, n, k; + 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 <= MAX_ALPHA && alphas[n] == 0; ++n) {} + min_a = 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 (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 + 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 + 1 < nb && 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]]; // for the record. + } + + if (nb > 1) { + const int smooth = (enc->config_->preprocessing & 1); + if (smooth) SmoothSegmentMap(enc); + } + + 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. 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 = MAX_INTRA16_MODE; + int mode; + int best_alpha = DEFAULT_ALPHA; + int best_mode = 0; + + VP8MakeLuma16Preds(it); + for (mode = 0; mode < max_mode; ++mode) { + 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; + } + } + VP8SetIntra16Mode(it, best_mode); + return best_alpha; +} + +static int MBAnalyzeBestIntra4Mode(VP8EncIterator* const it, + int best_alpha) { + uint8_t modes[16]; + 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 = 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) { + 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. + } + } + // 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_ENC)); + + i4_alpha = GetAlpha(&total_histo); + if (IS_BETTER_ALPHA(i4_alpha, best_alpha)) { + VP8SetIntra4Mode(it, modes); + best_alpha = i4_alpha; + } + return best_alpha; +} + +static int MBAnalyzeBestUVMode(VP8EncIterator* const it) { + int best_alpha = DEFAULT_ALPHA; + int best_mode = 0; + const int max_mode = MAX_UV_MODE; + int mode; + + VP8MakeChroma8Preds(it); + for (mode = 0; mode < max_mode; ++mode) { + 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; + } + } + VP8SetIntraUVMode(it, best_mode); + return best_alpha; +} + +static void MBAnalyze(VP8EncIterator* const it, + int alphas[MAX_ALPHA + 1], + int* const alpha, 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_ >= 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. + // TODO(skal): improve criterion. + best_alpha = MBAnalyzeBestIntra4Mode(it, best_alpha); + } + best_uv_alpha = MBAnalyzeBestUVMode(it); + + // Final susceptibility mix + 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; +} + +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; +} + +//------------------------------------------------------------------------------ +// 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. + +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; + 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; +} + +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/thirdparty/libwebp/enc/backward_references.c b/thirdparty/libwebp/enc/backward_references.c new file mode 100644 index 0000000000..136a24a8c3 --- /dev/null +++ b/thirdparty/libwebp/enc/backward_references.c @@ -0,0 +1,1715 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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) +// + +#include <assert.h> +#include <math.h> + +#include "./backward_references.h" +#include "./histogram.h" +#include "../dsp/lossless.h" +#include "../dsp/dsp.h" +#include "../utils/color_cache.h" +#include "../utils/utils.h" + +#define VALUES_IN_BYTE 256 + +#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_BITS 20 +#define WINDOW_SIZE ((1 << WINDOW_SIZE_BITS) - 120) + +// Bounds for the match length. +#define MIN_LENGTH 2 +// If you change this, you need MAX_LENGTH_BITS + WINDOW_SIZE_BITS <= 32 as it +// is used in VP8LHashChain. +#define MAX_LENGTH_BITS 12 +// We want the max value to be attainable and stored in MAX_LENGTH_BITS bits. +#define MAX_LENGTH ((1 << MAX_LENGTH_BITS) - 1) +#if MAX_LENGTH_BITS + WINDOW_SIZE_BITS > 32 +#error "MAX_LENGTH_BITS + WINDOW_SIZE_BITS > 32" +#endif + +// ----------------------------------------------------------------------------- + +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; +} + +// Returns the exact index where array1 and array2 are different. For an index +// inferior or equal to best_len_match, the return value just has to be strictly +// inferior to best_len_match. The current behavior is to return 0 if this index +// is best_len_match, and the index itself otherwise. +// If no two elements are the same, it returns max_limit. +static WEBP_INLINE int FindMatchLength(const uint32_t* const array1, + const uint32_t* const array2, + int best_len_match, int max_limit) { + // 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; + + return VP8LVectorMismatch(array1, array2, max_limit); +} + +// ----------------------------------------------------------------------------- +// VP8LBackwardRefs + +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 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; + } +} + +void VP8LBackwardRefsInit(VP8LBackwardRefs* const refs, int block_size) { + assert(refs != NULL); + 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 + +int VP8LHashChainInit(VP8LHashChain* const p, int size) { + assert(p->size_ == 0); + assert(p->offset_length_ == NULL); + assert(size > 0); + p->offset_length_ = + (uint32_t*)WebPSafeMalloc(size, sizeof(*p->offset_length_)); + if (p->offset_length_ == NULL) return 0; + p->size_ = size; + + return 1; +} + +void VP8LHashChainClear(VP8LHashChain* const p) { + assert(p != NULL); + WebPSafeFree(p->offset_length_); + + p->size_ = 0; + p->offset_length_ = 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; +} + +// Returns the maximum number of hash chain lookups to do for a +// given compression quality. Return value in range [8, 86]. +static int GetMaxItersForQuality(int quality) { + return 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; +} + +int VP8LHashChainFill(VP8LHashChain* const p, int quality, + const uint32_t* const argb, int xsize, int ysize) { + const int size = xsize * ysize; + const int iter_max = GetMaxItersForQuality(quality); + const int iter_min = iter_max - quality / 10; + const uint32_t window_size = GetWindowSizeForHashChain(quality, xsize); + int pos; + uint32_t base_position; + int32_t* hash_to_first_index; + // Temporarily use the p->offset_length_ as a hash chain. + int32_t* chain = (int32_t*)p->offset_length_; + assert(p->size_ != 0); + assert(p->offset_length_ != NULL); + + hash_to_first_index = + (int32_t*)WebPSafeMalloc(HASH_SIZE, sizeof(*hash_to_first_index)); + if (hash_to_first_index == NULL) return 0; + + // Set the int32_t array to -1. + memset(hash_to_first_index, 0xff, HASH_SIZE * sizeof(*hash_to_first_index)); + // Fill the chain linking pixels with the same hash. + for (pos = 0; pos < size - 1; ++pos) { + const uint32_t hash_code = GetPixPairHash64(argb + pos); + chain[pos] = hash_to_first_index[hash_code]; + hash_to_first_index[hash_code] = pos; + } + WebPSafeFree(hash_to_first_index); + + // Find the best match interval at each pixel, defined by an offset to the + // pixel and a length. The right-most pixel cannot match anything to the right + // (hence a best length of 0) and the left-most pixel nothing to the left + // (hence an offset of 0). + p->offset_length_[0] = p->offset_length_[size - 1] = 0; + for (base_position = size - 2 < 0 ? 0 : size - 2; base_position > 0;) { + const int max_len = MaxFindCopyLength(size - 1 - base_position); + const uint32_t* const argb_start = argb + base_position; + int iter = iter_max; + int best_length = 0; + uint32_t best_distance = 0; + const int min_pos = + (base_position > window_size) ? base_position - window_size : 0; + const int length_max = (max_len < 256) ? max_len : 256; + uint32_t max_base_position; + + for (pos = chain[base_position]; pos >= min_pos; pos = chain[pos]) { + int curr_length; + if (--iter < 0) { + break; + } + assert(base_position > (uint32_t)pos); + + curr_length = + FindMatchLength(argb + pos, argb_start, best_length, max_len); + if (best_length < curr_length) { + best_length = curr_length; + best_distance = base_position - pos; + // Stop if we have reached the maximum length. Otherwise, make sure + // we have executed a minimum number of iterations depending on the + // quality. + if ((best_length == MAX_LENGTH) || + (curr_length >= length_max && iter < iter_min)) { + break; + } + } + } + // We have the best match but in case the two intervals continue matching + // to the left, we have the best matches for the left-extended pixels. + max_base_position = base_position; + while (1) { + assert(best_length <= MAX_LENGTH); + assert(best_distance <= WINDOW_SIZE); + p->offset_length_[base_position] = + (best_distance << MAX_LENGTH_BITS) | (uint32_t)best_length; + --base_position; + // Stop if we don't have a match or if we are out of bounds. + if (best_distance == 0 || base_position == 0) break; + // Stop if we cannot extend the matching intervals to the left. + if (base_position < best_distance || + argb[base_position - best_distance] != argb[base_position]) { + break; + } + // Stop if we are matching at its limit because there could be a closer + // matching interval with the same maximum length. Then again, if the + // matching interval is as close as possible (best_distance == 1), we will + // never find anything better so let's continue. + if (best_length == MAX_LENGTH && best_distance != 1 && + base_position + MAX_LENGTH < max_base_position) { + break; + } + if (best_length < MAX_LENGTH) { + ++best_length; + max_base_position = base_position; + } + } + } + return 1; +} + +static WEBP_INLINE int HashChainFindOffset(const VP8LHashChain* const p, + const int base_position) { + return p->offset_length_[base_position] >> MAX_LENGTH_BITS; +} + +static WEBP_INLINE int HashChainFindLength(const VP8LHashChain* const p, + const int base_position) { + return p->offset_length_[base_position] & ((1U << MAX_LENGTH_BITS) - 1); +} + +static WEBP_INLINE void HashChainFindCopy(const VP8LHashChain* const p, + int base_position, + int* const offset_ptr, + int* const length_ptr) { + *offset_ptr = HashChainFindOffset(p, base_position); + *length_ptr = HashChainFindLength(p, base_position); +} + +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); + } + BackwardRefsCursorAdd(refs, v); +} + +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 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 { + AddSingleLiteral(argb[i], use_color_cache, &hashers, refs); + i++; + } + } + if (use_color_cache) VP8LColorCacheClear(&hashers); + return !refs->error_; +} + +static int BackwardReferencesLz77(int xsize, int ysize, + const uint32_t* const argb, int cache_bits, + const VP8LHashChain* const hash_chain, + VP8LBackwardRefs* const refs) { + int i; + int i_last_check = -1; + int ok = 0; + int cc_init = 0; + const int use_color_cache = (cache_bits > 0); + const int pix_count = xsize * ysize; + VP8LColorCache hashers; + + if (use_color_cache) { + cc_init = VP8LColorCacheInit(&hashers, cache_bits); + if (!cc_init) goto Error; + } + ClearBackwardRefs(refs); + for (i = 0; i < pix_count;) { + // Alternative#1: Code the pixels starting at 'i' using backward reference. + int offset = 0; + int len = 0; + int j; + HashChainFindCopy(hash_chain, i, &offset, &len); + if (len > MIN_LENGTH + 1) { + const int len_ini = len; + int max_reach = 0; + assert(i + len < pix_count); + // Only start from what we have not checked already. + i_last_check = (i > i_last_check) ? i : i_last_check; + // We know the best match for the current pixel but we try to find the + // best matches for the current pixel AND the next one combined. + // The naive method would use the intervals: + // [i,i+len) + [i+len, length of best match at i+len) + // while we check if we can use: + // [i,j) (where j<=i+len) + [j, length of best match at j) + for (j = i_last_check + 1; j <= i + len_ini; ++j) { + const int len_j = HashChainFindLength(hash_chain, j); + const int reach = + j + (len_j > MIN_LENGTH + 1 ? len_j : 1); // 1 for single literal. + if (reach > max_reach) { + len = j - i; + max_reach = reach; + } + } + } else { + len = 1; + } + // Go with literal or backward reference. + assert(len > 0); + if (len == 1) { + AddSingleLiteral(argb[i], use_color_cache, &hashers, refs); + } else { + BackwardRefsCursorAdd(refs, PixOrCopyCreateCopy(offset, len)); + if (use_color_cache) { + for (j = i; j < i + len; ++j) VP8LColorCacheInsert(&hashers, argb[j]); + } + } + i += len; + } + + ok = !refs->error_; + Error: + if (cc_init) VP8LColorCacheClear(&hashers); + return ok; +} + +// ----------------------------------------------------------------------------- + +typedef struct { + double alpha_[VALUES_IN_BYTE]; + double red_[VALUES_IN_BYTE]; + double blue_[VALUES_IN_BYTE]; + double distance_[NUM_DISTANCE_CODES]; + double* literal_; +} CostModel; + +static int BackwardReferencesTraceBackwards( + int xsize, int ysize, const uint32_t* const argb, int quality, + int cache_bits, const VP8LHashChain* const hash_chain, + VP8LBackwardRefs* const refs); + +static void ConvertPopulationCountTableToBitEstimates( + 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) { + 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 cache_bits, + VP8LBackwardRefs* const refs) { + int ok = 0; + VP8LHistogram* const histo = VP8LAllocateHistogram(cache_bits); + if (histo == NULL) goto Error; + + VP8LHistogramCreate(histo, refs, cache_bits); + + ConvertPopulationCountTableToBitEstimates( + VP8LHistogramNumCodes(histo->palette_code_bits_), + 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: + VP8LFreeHistogram(histo); + 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; + 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; + VP8LPrefixEncodeBits(distance, &code, &extra_bits); + return m->distance_[code] + extra_bits; +} + +static void AddSingleLiteralWithCostModel(const uint32_t* const argb, + VP8LColorCache* const hashers, + const CostModel* const cost_model, + int idx, 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 (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. + } +} + +// ----------------------------------------------------------------------------- +// CostManager and interval handling + +// Empirical value to avoid high memory consumption but good for performance. +#define COST_CACHE_INTERVAL_SIZE_MAX 100 + +// To perform backward reference every pixel at index index_ is considered and +// the cost for the MAX_LENGTH following pixels computed. Those following pixels +// at index index_ + k (k from 0 to MAX_LENGTH) have a cost of: +// distance_cost_ at index_ + GetLengthCost(cost_model, k) +// (named cost) (named cached cost) +// and the minimum value is kept. GetLengthCost(cost_model, k) is cached in an +// array of size MAX_LENGTH. +// Instead of performing MAX_LENGTH comparisons per pixel, we keep track of the +// minimal values using intervals, for which lower_ and upper_ bounds are kept. +// An interval is defined by the index_ of the pixel that generated it and +// is only useful in a range of indices from start_ to end_ (exclusive), i.e. +// it contains the minimum value for pixels between start_ and end_. +// Intervals are stored in a linked list and ordered by start_. When a new +// interval has a better minimum, old intervals are split or removed. +typedef struct CostInterval CostInterval; +struct CostInterval { + double lower_; + double upper_; + int start_; + int end_; + double distance_cost_; + int index_; + CostInterval* previous_; + CostInterval* next_; +}; + +// The GetLengthCost(cost_model, k) part of the costs is also bounded for +// efficiency in a set of intervals of a different type. +// If those intervals are small enough, they are not used for comparison and +// written into the costs right away. +typedef struct { + double lower_; // Lower bound of the interval. + double upper_; // Upper bound of the interval. + int start_; + int end_; // Exclusive. + int do_write_; // If !=0, the interval is saved to cost instead of being kept + // for comparison. +} CostCacheInterval; + +// This structure is in charge of managing intervals and costs. +// It caches the different CostCacheInterval, caches the different +// GetLengthCost(cost_model, k) in cost_cache_ and the CostInterval's (whose +// count_ is limited by COST_CACHE_INTERVAL_SIZE_MAX). +#define COST_MANAGER_MAX_FREE_LIST 10 +typedef struct { + CostInterval* head_; + int count_; // The number of stored intervals. + CostCacheInterval* cache_intervals_; + size_t cache_intervals_size_; + double cost_cache_[MAX_LENGTH]; // Contains the GetLengthCost(cost_model, k). + double min_cost_cache_; // The minimum value in cost_cache_[1:]. + double max_cost_cache_; // The maximum value in cost_cache_[1:]. + float* costs_; + uint16_t* dist_array_; + // Most of the time, we only need few intervals -> use a free-list, to avoid + // fragmentation with small allocs in most common cases. + CostInterval intervals_[COST_MANAGER_MAX_FREE_LIST]; + CostInterval* free_intervals_; + // These are regularly malloc'd remains. This list can't grow larger than than + // size COST_CACHE_INTERVAL_SIZE_MAX - COST_MANAGER_MAX_FREE_LIST, note. + CostInterval* recycled_intervals_; + // Buffer used in BackwardReferencesHashChainDistanceOnly to store the ends + // of the intervals that can have impacted the cost at a pixel. + int* interval_ends_; + int interval_ends_size_; +} CostManager; + +static int IsCostCacheIntervalWritable(int start, int end) { + // 100 is the length for which we consider an interval for comparison, and not + // for writing. + // The first intervals are very small and go in increasing size. This constant + // helps merging them into one big interval (up to index 150/200 usually from + // which intervals start getting much bigger). + // This value is empirical. + return (end - start + 1 < 100); +} + +static void CostIntervalAddToFreeList(CostManager* const manager, + CostInterval* const interval) { + interval->next_ = manager->free_intervals_; + manager->free_intervals_ = interval; +} + +static int CostIntervalIsInFreeList(const CostManager* const manager, + const CostInterval* const interval) { + return (interval >= &manager->intervals_[0] && + interval <= &manager->intervals_[COST_MANAGER_MAX_FREE_LIST - 1]); +} + +static void CostManagerInitFreeList(CostManager* const manager) { + int i; + manager->free_intervals_ = NULL; + for (i = 0; i < COST_MANAGER_MAX_FREE_LIST; ++i) { + CostIntervalAddToFreeList(manager, &manager->intervals_[i]); + } +} + +static void DeleteIntervalList(CostManager* const manager, + const CostInterval* interval) { + while (interval != NULL) { + const CostInterval* const next = interval->next_; + if (!CostIntervalIsInFreeList(manager, interval)) { + WebPSafeFree((void*)interval); + } // else: do nothing + interval = next; + } +} + +static void CostManagerClear(CostManager* const manager) { + if (manager == NULL) return; + + WebPSafeFree(manager->costs_); + WebPSafeFree(manager->cache_intervals_); + WebPSafeFree(manager->interval_ends_); + + // Clear the interval lists. + DeleteIntervalList(manager, manager->head_); + manager->head_ = NULL; + DeleteIntervalList(manager, manager->recycled_intervals_); + manager->recycled_intervals_ = NULL; + + // Reset pointers, count_ and cache_intervals_size_. + memset(manager, 0, sizeof(*manager)); + CostManagerInitFreeList(manager); +} + +static int CostManagerInit(CostManager* const manager, + uint16_t* const dist_array, int pix_count, + const CostModel* const cost_model) { + int i; + const int cost_cache_size = (pix_count > MAX_LENGTH) ? MAX_LENGTH : pix_count; + // This constant is tied to the cost_model we use. + // Empirically, differences between intervals is usually of more than 1. + const double min_cost_diff = 0.1; + + manager->costs_ = NULL; + manager->cache_intervals_ = NULL; + manager->interval_ends_ = NULL; + manager->head_ = NULL; + manager->recycled_intervals_ = NULL; + manager->count_ = 0; + manager->dist_array_ = dist_array; + CostManagerInitFreeList(manager); + + // Fill in the cost_cache_. + manager->cache_intervals_size_ = 1; + manager->cost_cache_[0] = 0; + for (i = 1; i < cost_cache_size; ++i) { + manager->cost_cache_[i] = GetLengthCost(cost_model, i); + // Get an approximation of the number of bound intervals. + if (fabs(manager->cost_cache_[i] - manager->cost_cache_[i - 1]) > + min_cost_diff) { + ++manager->cache_intervals_size_; + } + // Compute the minimum of cost_cache_. + if (i == 1) { + manager->min_cost_cache_ = manager->cost_cache_[1]; + manager->max_cost_cache_ = manager->cost_cache_[1]; + } else if (manager->cost_cache_[i] < manager->min_cost_cache_) { + manager->min_cost_cache_ = manager->cost_cache_[i]; + } else if (manager->cost_cache_[i] > manager->max_cost_cache_) { + manager->max_cost_cache_ = manager->cost_cache_[i]; + } + } + + // With the current cost models, we have 15 intervals, so we are safe by + // setting a maximum of COST_CACHE_INTERVAL_SIZE_MAX. + if (manager->cache_intervals_size_ > COST_CACHE_INTERVAL_SIZE_MAX) { + manager->cache_intervals_size_ = COST_CACHE_INTERVAL_SIZE_MAX; + } + manager->cache_intervals_ = (CostCacheInterval*)WebPSafeMalloc( + manager->cache_intervals_size_, sizeof(*manager->cache_intervals_)); + if (manager->cache_intervals_ == NULL) { + CostManagerClear(manager); + return 0; + } + + // Fill in the cache_intervals_. + { + double cost_prev = -1e38f; // unprobably low initial value + CostCacheInterval* prev = NULL; + CostCacheInterval* cur = manager->cache_intervals_; + const CostCacheInterval* const end = + manager->cache_intervals_ + manager->cache_intervals_size_; + + // Consecutive values in cost_cache_ are compared and if a big enough + // difference is found, a new interval is created and bounded. + for (i = 0; i < cost_cache_size; ++i) { + const double cost_val = manager->cost_cache_[i]; + if (i == 0 || + (fabs(cost_val - cost_prev) > min_cost_diff && cur + 1 < end)) { + if (i > 1) { + const int is_writable = + IsCostCacheIntervalWritable(cur->start_, cur->end_); + // Merge with the previous interval if both are writable. + if (is_writable && cur != manager->cache_intervals_ && + prev->do_write_) { + // Update the previous interval. + prev->end_ = cur->end_; + if (cur->lower_ < prev->lower_) { + prev->lower_ = cur->lower_; + } else if (cur->upper_ > prev->upper_) { + prev->upper_ = cur->upper_; + } + } else { + cur->do_write_ = is_writable; + prev = cur; + ++cur; + } + } + // Initialize an interval. + cur->start_ = i; + cur->do_write_ = 0; + cur->lower_ = cost_val; + cur->upper_ = cost_val; + } else { + // Update the current interval bounds. + if (cost_val < cur->lower_) { + cur->lower_ = cost_val; + } else if (cost_val > cur->upper_) { + cur->upper_ = cost_val; + } + } + cur->end_ = i + 1; + cost_prev = cost_val; + } + manager->cache_intervals_size_ = cur + 1 - manager->cache_intervals_; + } + + manager->costs_ = (float*)WebPSafeMalloc(pix_count, sizeof(*manager->costs_)); + if (manager->costs_ == NULL) { + CostManagerClear(manager); + return 0; + } + // Set the initial costs_ high for every pixel as we will keep the minimum. + for (i = 0; i < pix_count; ++i) manager->costs_[i] = 1e38f; + + // The cost at pixel is influenced by the cost intervals from previous pixels. + // Let us take the specific case where the offset is the same (which actually + // happens a lot in case of uniform regions). + // pixel i contributes to j>i a cost of: offset cost + cost_cache_[j-i] + // pixel i+1 contributes to j>i a cost of: 2*offset cost + cost_cache_[j-i-1] + // pixel i+2 contributes to j>i a cost of: 3*offset cost + cost_cache_[j-i-2] + // and so on. + // A pixel i influences the following length(j) < MAX_LENGTH pixels. What is + // the value of j such that pixel i + j cannot influence any of those pixels? + // This value is such that: + // max of cost_cache_ < j*offset cost + min of cost_cache_ + // (pixel i + j 's cost cannot beat the worst cost given by pixel i). + // This value will be used to optimize the cost computation in + // BackwardReferencesHashChainDistanceOnly. + { + // The offset cost is computed in GetDistanceCost and has a minimum value of + // the minimum in cost_model->distance_. The case where the offset cost is 0 + // will be dealt with differently later so we are only interested in the + // minimum non-zero offset cost. + double offset_cost_min = 0.; + int size; + for (i = 0; i < NUM_DISTANCE_CODES; ++i) { + if (cost_model->distance_[i] != 0) { + if (offset_cost_min == 0.) { + offset_cost_min = cost_model->distance_[i]; + } else if (cost_model->distance_[i] < offset_cost_min) { + offset_cost_min = cost_model->distance_[i]; + } + } + } + // In case all the cost_model->distance_ is 0, the next non-zero cost we + // can have is from the extra bit in GetDistanceCost, hence 1. + if (offset_cost_min < 1.) offset_cost_min = 1.; + + size = 1 + (int)ceil((manager->max_cost_cache_ - manager->min_cost_cache_) / + offset_cost_min); + // Empirically, we usually end up with a value below 100. + if (size > MAX_LENGTH) size = MAX_LENGTH; + + manager->interval_ends_ = + (int*)WebPSafeMalloc(size, sizeof(*manager->interval_ends_)); + if (manager->interval_ends_ == NULL) { + CostManagerClear(manager); + return 0; + } + manager->interval_ends_size_ = size; + } + + return 1; +} + +// Given the distance_cost for pixel 'index', update the cost at pixel 'i' if it +// is smaller than the previously computed value. +static WEBP_INLINE void UpdateCost(CostManager* const manager, int i, int index, + double distance_cost) { + int k = i - index; + double cost_tmp; + assert(k >= 0 && k < MAX_LENGTH); + cost_tmp = distance_cost + manager->cost_cache_[k]; + + if (manager->costs_[i] > cost_tmp) { + manager->costs_[i] = (float)cost_tmp; + manager->dist_array_[i] = k + 1; + } +} + +// Given the distance_cost for pixel 'index', update the cost for all the pixels +// between 'start' and 'end' excluded. +static WEBP_INLINE void UpdateCostPerInterval(CostManager* const manager, + int start, int end, int index, + double distance_cost) { + int i; + for (i = start; i < end; ++i) UpdateCost(manager, i, index, distance_cost); +} + +// Given two intervals, make 'prev' be the previous one of 'next' in 'manager'. +static WEBP_INLINE void ConnectIntervals(CostManager* const manager, + CostInterval* const prev, + CostInterval* const next) { + if (prev != NULL) { + prev->next_ = next; + } else { + manager->head_ = next; + } + + if (next != NULL) next->previous_ = prev; +} + +// Pop an interval in the manager. +static WEBP_INLINE void PopInterval(CostManager* const manager, + CostInterval* const interval) { + CostInterval* const next = interval->next_; + + if (interval == NULL) return; + + ConnectIntervals(manager, interval->previous_, next); + if (CostIntervalIsInFreeList(manager, interval)) { + CostIntervalAddToFreeList(manager, interval); + } else { // recycle regularly malloc'd intervals too + interval->next_ = manager->recycled_intervals_; + manager->recycled_intervals_ = interval; + } + --manager->count_; + assert(manager->count_ >= 0); +} + +// Update the cost at index i by going over all the stored intervals that +// overlap with i. +static WEBP_INLINE void UpdateCostPerIndex(CostManager* const manager, int i) { + CostInterval* current = manager->head_; + + while (current != NULL && current->start_ <= i) { + if (current->end_ <= i) { + // We have an outdated interval, remove it. + CostInterval* next = current->next_; + PopInterval(manager, current); + current = next; + } else { + UpdateCost(manager, i, current->index_, current->distance_cost_); + current = current->next_; + } + } +} + +// Given a current orphan interval and its previous interval, before +// it was orphaned (which can be NULL), set it at the right place in the list +// of intervals using the start_ ordering and the previous interval as a hint. +static WEBP_INLINE void PositionOrphanInterval(CostManager* const manager, + CostInterval* const current, + CostInterval* previous) { + assert(current != NULL); + + if (previous == NULL) previous = manager->head_; + while (previous != NULL && current->start_ < previous->start_) { + previous = previous->previous_; + } + while (previous != NULL && previous->next_ != NULL && + previous->next_->start_ < current->start_) { + previous = previous->next_; + } + + if (previous != NULL) { + ConnectIntervals(manager, current, previous->next_); + } else { + ConnectIntervals(manager, current, manager->head_); + } + ConnectIntervals(manager, previous, current); +} + +// Insert an interval in the list contained in the manager by starting at +// interval_in as a hint. The intervals are sorted by start_ value. +static WEBP_INLINE void InsertInterval(CostManager* const manager, + CostInterval* const interval_in, + double distance_cost, double lower, + double upper, int index, int start, + int end) { + CostInterval* interval_new; + + if (IsCostCacheIntervalWritable(start, end) || + manager->count_ >= COST_CACHE_INTERVAL_SIZE_MAX) { + // Write down the interval if it is too small. + UpdateCostPerInterval(manager, start, end, index, distance_cost); + return; + } + if (manager->free_intervals_ != NULL) { + interval_new = manager->free_intervals_; + manager->free_intervals_ = interval_new->next_; + } else if (manager->recycled_intervals_ != NULL) { + interval_new = manager->recycled_intervals_; + manager->recycled_intervals_ = interval_new->next_; + } else { // malloc for good + interval_new = (CostInterval*)WebPSafeMalloc(1, sizeof(*interval_new)); + if (interval_new == NULL) { + // Write down the interval if we cannot create it. + UpdateCostPerInterval(manager, start, end, index, distance_cost); + return; + } + } + + interval_new->distance_cost_ = distance_cost; + interval_new->lower_ = lower; + interval_new->upper_ = upper; + interval_new->index_ = index; + interval_new->start_ = start; + interval_new->end_ = end; + PositionOrphanInterval(manager, interval_new, interval_in); + + ++manager->count_; +} + +// When an interval has its start_ or end_ modified, it needs to be +// repositioned in the linked list. +static WEBP_INLINE void RepositionInterval(CostManager* const manager, + CostInterval* const interval) { + if (IsCostCacheIntervalWritable(interval->start_, interval->end_)) { + // Maybe interval has been resized and is small enough to be removed. + UpdateCostPerInterval(manager, interval->start_, interval->end_, + interval->index_, interval->distance_cost_); + PopInterval(manager, interval); + return; + } + + // Early exit if interval is at the right spot. + if ((interval->previous_ == NULL || + interval->previous_->start_ <= interval->start_) && + (interval->next_ == NULL || + interval->start_ <= interval->next_->start_)) { + return; + } + + ConnectIntervals(manager, interval->previous_, interval->next_); + PositionOrphanInterval(manager, interval, interval->previous_); +} + +// Given a new cost interval defined by its start at index, its last value and +// distance_cost, add its contributions to the previous intervals and costs. +// If handling the interval or one of its subintervals becomes to heavy, its +// contribution is added to the costs right away. +static WEBP_INLINE void PushInterval(CostManager* const manager, + double distance_cost, int index, + int last) { + size_t i; + CostInterval* interval = manager->head_; + CostInterval* interval_next; + const CostCacheInterval* const cost_cache_intervals = + manager->cache_intervals_; + + for (i = 0; i < manager->cache_intervals_size_ && + cost_cache_intervals[i].start_ < last; + ++i) { + // Define the intersection of the ith interval with the new one. + int start = index + cost_cache_intervals[i].start_; + const int end = index + (cost_cache_intervals[i].end_ > last + ? last + : cost_cache_intervals[i].end_); + const double lower_in = cost_cache_intervals[i].lower_; + const double upper_in = cost_cache_intervals[i].upper_; + const double lower_full_in = distance_cost + lower_in; + const double upper_full_in = distance_cost + upper_in; + + if (cost_cache_intervals[i].do_write_) { + UpdateCostPerInterval(manager, start, end, index, distance_cost); + continue; + } + + for (; interval != NULL && interval->start_ < end && start < end; + interval = interval_next) { + const double lower_full_interval = + interval->distance_cost_ + interval->lower_; + const double upper_full_interval = + interval->distance_cost_ + interval->upper_; + + interval_next = interval->next_; + + // Make sure we have some overlap + if (start >= interval->end_) continue; + + if (lower_full_in >= upper_full_interval) { + // When intervals are represented, the lower, the better. + // [**********************************************************] + // start end + // [----------------------------------] + // interval->start_ interval->end_ + // If we are worse than what we already have, add whatever we have so + // far up to interval. + const int start_new = interval->end_; + InsertInterval(manager, interval, distance_cost, lower_in, upper_in, + index, start, interval->start_); + start = start_new; + continue; + } + + // We know the two intervals intersect. + if (upper_full_in >= lower_full_interval) { + // There is no clear cut on which is best, so let's keep both. + // [*********[*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*]***********] + // start interval->start_ interval->end_ end + // OR + // [*********[*-*-*-*-*-*-*-*-*-*-*-]----------------------] + // start interval->start_ end interval->end_ + const int end_new = (interval->end_ <= end) ? interval->end_ : end; + InsertInterval(manager, interval, distance_cost, lower_in, upper_in, + index, start, end_new); + start = end_new; + } else if (start <= interval->start_ && interval->end_ <= end) { + // [----------------------------------] + // interval->start_ interval->end_ + // [**************************************************************] + // start end + // We can safely remove the old interval as it is fully included. + PopInterval(manager, interval); + } else { + if (interval->start_ <= start && end <= interval->end_) { + // [--------------------------------------------------------------] + // interval->start_ interval->end_ + // [*****************************] + // start end + // We have to split the old interval as it fully contains the new one. + const int end_original = interval->end_; + interval->end_ = start; + InsertInterval(manager, interval, interval->distance_cost_, + interval->lower_, interval->upper_, interval->index_, + end, end_original); + } else if (interval->start_ < start) { + // [------------------------------------] + // interval->start_ interval->end_ + // [*****************************] + // start end + interval->end_ = start; + } else { + // [------------------------------------] + // interval->start_ interval->end_ + // [*****************************] + // start end + interval->start_ = end; + } + + // The interval has been modified, we need to reposition it or write it. + RepositionInterval(manager, interval); + } + } + // Insert the remaining interval from start to end. + InsertInterval(manager, interval, distance_cost, lower_in, upper_in, index, + start, end); + } +} + +static int BackwardReferencesHashChainDistanceOnly( + int xsize, int ysize, const uint32_t* const argb, int quality, + int cache_bits, const VP8LHashChain* const hash_chain, + VP8LBackwardRefs* const refs, uint16_t* const dist_array) { + int i; + int ok = 0; + int cc_init = 0; + const int pix_count = xsize * ysize; + const int use_color_cache = (cache_bits > 0); + 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*)WebPSafeCalloc(1ULL, cost_model_size); + VP8LColorCache hashers; + const int skip_length = 32 + quality; + const int skip_min_distance_code = 2; + CostManager* cost_manager = + (CostManager*)WebPSafeMalloc(1ULL, sizeof(*cost_manager)); + + if (cost_model == NULL || cost_manager == 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, cache_bits, refs)) { + goto Error; + } + + if (!CostManagerInit(cost_manager, dist_array, pix_count, cost_model)) { + goto Error; + } + + // We loop one pixel at a time, but store all currently best points to + // non-processed locations from this point. + dist_array[0] = 0; + // Add first pixel as literal. + AddSingleLiteralWithCostModel(argb + 0, &hashers, cost_model, 0, + use_color_cache, 0.0, cost_manager->costs_, + dist_array); + + for (i = 1; i < pix_count - 1; ++i) { + int offset = 0, len = 0; + double prev_cost = cost_manager->costs_[i - 1]; + HashChainFindCopy(hash_chain, i, &offset, &len); + if (len >= MIN_LENGTH) { + const int code = DistanceToPlaneCode(xsize, offset); + const double offset_cost = GetDistanceCost(cost_model, code); + const int first_i = i; + int j_max = 0, interval_ends_index = 0; + const int is_offset_zero = (offset_cost == 0.); + + if (!is_offset_zero) { + j_max = (int)ceil( + (cost_manager->max_cost_cache_ - cost_manager->min_cost_cache_) / + offset_cost); + if (j_max < 1) { + j_max = 1; + } else if (j_max > cost_manager->interval_ends_size_ - 1) { + // This could only happen in the case of MAX_LENGTH. + j_max = cost_manager->interval_ends_size_ - 1; + } + } // else j_max is unused anyway. + + // Instead of considering all contributions from a pixel i by calling: + // PushInterval(cost_manager, prev_cost + offset_cost, i, len); + // we optimize these contributions in case offset_cost stays the same for + // consecutive pixels. This describes a set of pixels similar to a + // previous set (e.g. constant color regions). + for (; i < pix_count - 1; ++i) { + int offset_next, len_next; + prev_cost = cost_manager->costs_[i - 1]; + + if (is_offset_zero) { + // No optimization can be made so we just push all of the + // contributions from i. + PushInterval(cost_manager, prev_cost, i, len); + } else { + // j_max is chosen as the smallest j such that: + // max of cost_cache_ < j*offset cost + min of cost_cache_ + // Therefore, the pixel influenced by i-j_max, cannot be influenced + // by i. Only the costs after the end of what i contributed need to be + // updated. cost_manager->interval_ends_ is a circular buffer that + // stores those ends. + const double distance_cost = prev_cost + offset_cost; + int j = cost_manager->interval_ends_[interval_ends_index]; + if (i - first_i <= j_max || + !IsCostCacheIntervalWritable(j, i + len)) { + PushInterval(cost_manager, distance_cost, i, len); + } else { + for (; j < i + len; ++j) { + UpdateCost(cost_manager, j, i, distance_cost); + } + } + // Store the new end in the circular buffer. + assert(interval_ends_index < cost_manager->interval_ends_size_); + cost_manager->interval_ends_[interval_ends_index] = i + len; + if (++interval_ends_index > j_max) interval_ends_index = 0; + } + + // Check whether i is the last pixel to consider, as it is handled + // differently. + if (i + 1 >= pix_count - 1) break; + HashChainFindCopy(hash_chain, i + 1, &offset_next, &len_next); + if (offset_next != offset) break; + len = len_next; + UpdateCostPerIndex(cost_manager, i); + AddSingleLiteralWithCostModel(argb + i, &hashers, cost_model, i, + use_color_cache, prev_cost, + cost_manager->costs_, dist_array); + } + // Submit the last pixel. + UpdateCostPerIndex(cost_manager, i + 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) { + int k; + for (k = 0; k < len; ++k) { + VP8LColorCacheInsert(&hashers, argb[i + k]); + } + } + // 2) jump. + { + const int i_next = i + len - 1; // for loop does ++i, thus -1 here. + for (; i <= i_next; ++i) UpdateCostPerIndex(cost_manager, i + 1); + i = i_next; + } + goto next_symbol; + } + if (len > MIN_LENGTH) { + int code_min_length; + double cost_total; + offset = HashChainFindOffset(hash_chain, i); + code_min_length = DistanceToPlaneCode(xsize, offset); + cost_total = prev_cost + + GetDistanceCost(cost_model, code_min_length) + + GetLengthCost(cost_model, 1); + if (cost_manager->costs_[i + 1] > cost_total) { + cost_manager->costs_[i + 1] = (float)cost_total; + dist_array[i + 1] = 2; + } + } + } else { // len < MIN_LENGTH + UpdateCostPerIndex(cost_manager, i + 1); + } + + AddSingleLiteralWithCostModel(argb + i, &hashers, cost_model, i, + use_color_cache, prev_cost, + cost_manager->costs_, dist_array); + + next_symbol: ; + } + // Handle the last pixel. + if (i == (pix_count - 1)) { + AddSingleLiteralWithCostModel( + argb + i, &hashers, cost_model, i, use_color_cache, + cost_manager->costs_[pix_count - 2], cost_manager->costs_, dist_array); + } + + ok = !refs->error_; + Error: + if (cc_init) VP8LColorCacheClear(&hashers); + CostManagerClear(cost_manager); + WebPSafeFree(cost_model); + WebPSafeFree(cost_manager); + return ok; +} + +// 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; + } + *chosen_path = path; + *chosen_path_size = (int)(dist_array + dist_array_size - path); +} + +static int BackwardReferencesHashChainFollowChosenPath( + const uint32_t* const argb, int cache_bits, + const uint16_t* const chosen_path, int chosen_path_size, + const VP8LHashChain* const hash_chain, VP8LBackwardRefs* const refs) { + const int use_color_cache = (cache_bits > 0); + int ix; + int i = 0; + int ok = 0; + int cc_init = 0; + VP8LColorCache hashers; + + if (use_color_cache) { + cc_init = VP8LColorCacheInit(&hashers, cache_bits); + if (!cc_init) goto Error; + } + + ClearBackwardRefs(refs); + for (ix = 0; ix < chosen_path_size; ++ix) { + const int len = chosen_path[ix]; + if (len != 1) { + int k; + const int offset = HashChainFindOffset(hash_chain, i); + BackwardRefsCursorAdd(refs, PixOrCopyCreateCopy(offset, len)); + if (use_color_cache) { + for (k = 0; k < len; ++k) { + VP8LColorCacheInsert(&hashers, argb[i + k]); + } + } + 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]); + v = PixOrCopyCreateCacheIdx(idx); + } else { + if (use_color_cache) VP8LColorCacheInsert(&hashers, argb[i]); + v = PixOrCopyCreateLiteral(argb[i]); + } + BackwardRefsCursorAdd(refs, v); + ++i; + } + } + ok = !refs->error_; + Error: + if (cc_init) VP8LColorCacheClear(&hashers); + return ok; +} + +// Returns 1 on success. +static int BackwardReferencesTraceBackwards( + int xsize, int ysize, const uint32_t* const argb, int quality, + int cache_bits, const VP8LHashChain* const hash_chain, + VP8LBackwardRefs* const refs) { + int ok = 0; + const int dist_array_size = xsize * ysize; + uint16_t* chosen_path = NULL; + int chosen_path_size = 0; + uint16_t* dist_array = + (uint16_t*)WebPSafeMalloc(dist_array_size, sizeof(*dist_array)); + + if (dist_array == NULL) goto Error; + + if (!BackwardReferencesHashChainDistanceOnly( + xsize, ysize, argb, quality, cache_bits, hash_chain, + refs, dist_array)) { + goto Error; + } + TraceBackwards(dist_array, dist_array_size, &chosen_path, &chosen_path_size); + if (!BackwardReferencesHashChainFollowChosenPath( + argb, cache_bits, chosen_path, chosen_path_size, hash_chain, refs)) { + goto Error; + } + ok = 1; + Error: + WebPSafeFree(dist_array); + return ok; +} + +static void BackwardReferences2DLocality(int xsize, + 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); + c.cur_pos->argb_or_distance = transformed_dist; + } + VP8LRefsCursorNext(&c); + } +} + +// 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; + + if (use_color_cache) { + cc_init = VP8LColorCacheInit(&hashers, cache_bits); + if (!cc_init) goto Error; + } + if (!use_color_cache) { + while (VP8LRefsCursorOk(&c)) { + VP8LHistogramAddSinglePixOrCopy(histo, c.cur_pos); + VP8LRefsCursorNext(&c); + } + } else { + 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; +} + +// 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, + const 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; + } + if (!BackwardReferencesLz77(xsize, ysize, argb, cache_bits_low, 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; +} + +// 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; + VP8LColorCache hashers; + VP8LRefsCursor c = VP8LRefsCursorInit(refs); + if (!VP8LColorCacheInit(&hashers, cache_bits)) return 0; + + while (VP8LRefsCursorOk(&c)) { + PixOrCopy* const v = c.cur_pos; + if (PixOrCopyIsLiteral(v)) { + 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 { + VP8LColorCacheInsert(&hashers, argb_literal); + } + ++pixel_index; + } else { + // 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++]); + } + } + VP8LRefsCursorNext(&c); + } + VP8LColorCacheClear(&hashers); + return 1; +} + +static VP8LBackwardRefs* GetBackwardReferencesLowEffort( + int width, int height, const uint32_t* const argb, + int* const cache_bits, const VP8LHashChain* const hash_chain, + VP8LBackwardRefs refs_array[2]) { + VP8LBackwardRefs* refs_lz77 = &refs_array[0]; + *cache_bits = 0; + if (!BackwardReferencesLz77(width, height, argb, 0, 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, const 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; + } + + 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, hash_chain, + refs_lz77)) { + goto Error; + } + } + + 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: + VP8LFreeHistogram(histo); + return best; +} + +VP8LBackwardRefs* VP8LGetBackwardReferences( + int width, int height, const uint32_t* const argb, int quality, + int low_effort, int* const cache_bits, + const VP8LHashChain* const hash_chain, VP8LBackwardRefs refs_array[2]) { + if (low_effort) { + return GetBackwardReferencesLowEffort(width, height, argb, cache_bits, + hash_chain, refs_array); + } else { + return GetBackwardReferences(width, height, argb, quality, cache_bits, + hash_chain, refs_array); + } +} diff --git a/thirdparty/libwebp/enc/backward_references.h b/thirdparty/libwebp/enc/backward_references.h new file mode 100644 index 0000000000..0cadb11e11 --- /dev/null +++ b/thirdparty/libwebp/enc/backward_references.h @@ -0,0 +1,206 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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) +// + +#ifndef WEBP_ENC_BACKWARD_REFERENCES_H_ +#define WEBP_ENC_BACKWARD_REFERENCES_H_ + +#include <assert.h> +#include <stdlib.h> +#include "../webp/types.h" +#include "../webp/format_constants.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// The maximum allowed limit is 11. +#define MAX_COLOR_CACHE_BITS 10 + +// ----------------------------------------------------------------------------- +// 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; +} + +// ----------------------------------------------------------------------------- +// VP8LHashChain + +#define HASH_BITS 18 +#define HASH_SIZE (1 << HASH_BITS) + +typedef struct VP8LHashChain VP8LHashChain; +struct VP8LHashChain { + // The 20 most significant bits contain the offset at which the best match + // is found. These 20 bits are the limit defined by GetWindowSizeForHashChain + // (through WINDOW_SIZE = 1<<20). + // The lower 12 bits contain the length of the match. The 12 bit limit is + // defined in MaxFindCopyLength with MAX_LENGTH=4096. + uint32_t* offset_length_; + // 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_; +}; + +// Must be called first, to set size. +int VP8LHashChainInit(VP8LHashChain* const p, int size); +// Pre-compute the best matches for argb. +int VP8LHashChainFill(VP8LHashChain* const p, int quality, + const uint32_t* const argb, int xsize, int ysize); +void VP8LHashChainClear(VP8LHashChain* const p); // release memory + +// ----------------------------------------------------------------------------- +// 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) +}; + +// 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); + +// 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. +// 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, + const VP8LHashChain* const hash_chain, VP8LBackwardRefs refs[2]); + +#ifdef __cplusplus +} +#endif + +#endif // WEBP_ENC_BACKWARD_REFERENCES_H_ diff --git a/thirdparty/libwebp/enc/config.c b/thirdparty/libwebp/enc/config.c new file mode 100644 index 0000000000..f9f7961d58 --- /dev/null +++ b/thirdparty/libwebp/enc/config.c @@ -0,0 +1,173 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 "../webp/encode.h" + +//------------------------------------------------------------------------------ +// 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 = 60; // mid-filtering + config->filter_sharpness = 0; + config->filter_type = 1; // default: strong (so U/V is filtered too) + 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->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) { + case WEBP_PRESET_PICTURE: + 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; + 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 + 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: + 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 > 7) + 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->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; +} + +//------------------------------------------------------------------------------ + +#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/thirdparty/libwebp/enc/cost.c b/thirdparty/libwebp/enc/cost.c new file mode 100644 index 0000000000..ae7fe01388 --- /dev/null +++ b/thirdparty/libwebp/enc/cost.c @@ -0,0 +1,354 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./cost.h" + +//------------------------------------------------------------------------------ +// 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} +}; + +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(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) { + const uint8_t* const p = proba->coeffs_[ctype][band][ctx]; + uint16_t* const table = proba->level_cost_[ctype][band][ctx]; + 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]) + cost0; + 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. + } + } + 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; +} + +//------------------------------------------------------------------------------ +// 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] = { + { { 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 + +// 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/thirdparty/libwebp/enc/cost.h b/thirdparty/libwebp/enc/cost.h new file mode 100644 index 0000000000..20960d6d74 --- /dev/null +++ b/thirdparty/libwebp/enc/cost.h @@ -0,0 +1,68 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_ENC_COST_H_ +#define WEBP_ENC_COST_H_ + +#include <assert.h> +#include <stdlib.h> +#include "./vp8enci.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// 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) { + return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba]; +} + +// Level cost calculations +extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2]; +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]; +} + +// 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]; + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_ENC_COST_H_ */ diff --git a/thirdparty/libwebp/enc/delta_palettization.c b/thirdparty/libwebp/enc/delta_palettization.c new file mode 100644 index 0000000000..062e588d79 --- /dev/null +++ b/thirdparty/libwebp/enc/delta_palettization.c @@ -0,0 +1,455 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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: Mislav Bradac (mislavm@google.com) +// + +#include "./delta_palettization.h" + +#ifdef WEBP_EXPERIMENTAL_FEATURES +#include "../webp/types.h" +#include "../dsp/lossless.h" + +#define MK_COL(r, g, b) (((r) << 16) + ((g) << 8) + (b)) + +// Format allows palette up to 256 entries, but more palette entries produce +// bigger entropy. In the future it will probably be useful to add more entries +// that are far from the origin of the palette or choose remaining entries +// dynamically. +#define DELTA_PALETTE_SIZE 226 + +// Palette used for delta_palettization. Entries are roughly sorted by distance +// of their signed equivalents from the origin. +static const uint32_t kDeltaPalette[DELTA_PALETTE_SIZE] = { + MK_COL(0u, 0u, 0u), + MK_COL(255u, 255u, 255u), + MK_COL(1u, 1u, 1u), + MK_COL(254u, 254u, 254u), + MK_COL(2u, 2u, 2u), + MK_COL(4u, 4u, 4u), + MK_COL(252u, 252u, 252u), + MK_COL(250u, 0u, 0u), + MK_COL(0u, 250u, 0u), + MK_COL(0u, 0u, 250u), + MK_COL(6u, 0u, 0u), + MK_COL(0u, 6u, 0u), + MK_COL(0u, 0u, 6u), + MK_COL(0u, 0u, 248u), + MK_COL(0u, 0u, 8u), + MK_COL(0u, 248u, 0u), + MK_COL(0u, 248u, 248u), + MK_COL(0u, 248u, 8u), + MK_COL(0u, 8u, 0u), + MK_COL(0u, 8u, 248u), + MK_COL(0u, 8u, 8u), + MK_COL(8u, 8u, 8u), + MK_COL(248u, 0u, 0u), + MK_COL(248u, 0u, 248u), + MK_COL(248u, 0u, 8u), + MK_COL(248u, 248u, 0u), + MK_COL(248u, 8u, 0u), + MK_COL(8u, 0u, 0u), + MK_COL(8u, 0u, 248u), + MK_COL(8u, 0u, 8u), + MK_COL(8u, 248u, 0u), + MK_COL(8u, 8u, 0u), + MK_COL(23u, 23u, 23u), + MK_COL(13u, 13u, 13u), + MK_COL(232u, 232u, 232u), + MK_COL(244u, 244u, 244u), + MK_COL(245u, 245u, 250u), + MK_COL(50u, 50u, 50u), + MK_COL(204u, 204u, 204u), + MK_COL(236u, 236u, 236u), + MK_COL(16u, 16u, 16u), + MK_COL(240u, 16u, 16u), + MK_COL(16u, 240u, 16u), + MK_COL(240u, 240u, 16u), + MK_COL(16u, 16u, 240u), + MK_COL(240u, 16u, 240u), + MK_COL(16u, 240u, 240u), + MK_COL(240u, 240u, 240u), + MK_COL(0u, 0u, 232u), + MK_COL(0u, 232u, 0u), + MK_COL(232u, 0u, 0u), + MK_COL(0u, 0u, 24u), + MK_COL(0u, 24u, 0u), + MK_COL(24u, 0u, 0u), + MK_COL(32u, 32u, 32u), + MK_COL(224u, 32u, 32u), + MK_COL(32u, 224u, 32u), + MK_COL(224u, 224u, 32u), + MK_COL(32u, 32u, 224u), + MK_COL(224u, 32u, 224u), + MK_COL(32u, 224u, 224u), + MK_COL(224u, 224u, 224u), + MK_COL(0u, 0u, 176u), + MK_COL(0u, 0u, 80u), + MK_COL(0u, 176u, 0u), + MK_COL(0u, 176u, 176u), + MK_COL(0u, 176u, 80u), + MK_COL(0u, 80u, 0u), + MK_COL(0u, 80u, 176u), + MK_COL(0u, 80u, 80u), + MK_COL(176u, 0u, 0u), + MK_COL(176u, 0u, 176u), + MK_COL(176u, 0u, 80u), + MK_COL(176u, 176u, 0u), + MK_COL(176u, 80u, 0u), + MK_COL(80u, 0u, 0u), + MK_COL(80u, 0u, 176u), + MK_COL(80u, 0u, 80u), + MK_COL(80u, 176u, 0u), + MK_COL(80u, 80u, 0u), + MK_COL(0u, 0u, 152u), + MK_COL(0u, 0u, 104u), + MK_COL(0u, 152u, 0u), + MK_COL(0u, 152u, 152u), + MK_COL(0u, 152u, 104u), + MK_COL(0u, 104u, 0u), + MK_COL(0u, 104u, 152u), + MK_COL(0u, 104u, 104u), + MK_COL(152u, 0u, 0u), + MK_COL(152u, 0u, 152u), + MK_COL(152u, 0u, 104u), + MK_COL(152u, 152u, 0u), + MK_COL(152u, 104u, 0u), + MK_COL(104u, 0u, 0u), + MK_COL(104u, 0u, 152u), + MK_COL(104u, 0u, 104u), + MK_COL(104u, 152u, 0u), + MK_COL(104u, 104u, 0u), + MK_COL(216u, 216u, 216u), + MK_COL(216u, 216u, 40u), + MK_COL(216u, 216u, 176u), + MK_COL(216u, 216u, 80u), + MK_COL(216u, 40u, 216u), + MK_COL(216u, 40u, 40u), + MK_COL(216u, 40u, 176u), + MK_COL(216u, 40u, 80u), + MK_COL(216u, 176u, 216u), + MK_COL(216u, 176u, 40u), + MK_COL(216u, 176u, 176u), + MK_COL(216u, 176u, 80u), + MK_COL(216u, 80u, 216u), + MK_COL(216u, 80u, 40u), + MK_COL(216u, 80u, 176u), + MK_COL(216u, 80u, 80u), + MK_COL(40u, 216u, 216u), + MK_COL(40u, 216u, 40u), + MK_COL(40u, 216u, 176u), + MK_COL(40u, 216u, 80u), + MK_COL(40u, 40u, 216u), + MK_COL(40u, 40u, 40u), + MK_COL(40u, 40u, 176u), + MK_COL(40u, 40u, 80u), + MK_COL(40u, 176u, 216u), + MK_COL(40u, 176u, 40u), + MK_COL(40u, 176u, 176u), + MK_COL(40u, 176u, 80u), + MK_COL(40u, 80u, 216u), + MK_COL(40u, 80u, 40u), + MK_COL(40u, 80u, 176u), + MK_COL(40u, 80u, 80u), + MK_COL(80u, 216u, 216u), + MK_COL(80u, 216u, 40u), + MK_COL(80u, 216u, 176u), + MK_COL(80u, 216u, 80u), + MK_COL(80u, 40u, 216u), + MK_COL(80u, 40u, 40u), + MK_COL(80u, 40u, 176u), + MK_COL(80u, 40u, 80u), + MK_COL(80u, 176u, 216u), + MK_COL(80u, 176u, 40u), + MK_COL(80u, 176u, 176u), + MK_COL(80u, 176u, 80u), + MK_COL(80u, 80u, 216u), + MK_COL(80u, 80u, 40u), + MK_COL(80u, 80u, 176u), + MK_COL(80u, 80u, 80u), + MK_COL(0u, 0u, 192u), + MK_COL(0u, 0u, 64u), + MK_COL(0u, 0u, 128u), + MK_COL(0u, 192u, 0u), + MK_COL(0u, 192u, 192u), + MK_COL(0u, 192u, 64u), + MK_COL(0u, 192u, 128u), + MK_COL(0u, 64u, 0u), + MK_COL(0u, 64u, 192u), + MK_COL(0u, 64u, 64u), + MK_COL(0u, 64u, 128u), + MK_COL(0u, 128u, 0u), + MK_COL(0u, 128u, 192u), + MK_COL(0u, 128u, 64u), + MK_COL(0u, 128u, 128u), + MK_COL(176u, 216u, 216u), + MK_COL(176u, 216u, 40u), + MK_COL(176u, 216u, 176u), + MK_COL(176u, 216u, 80u), + MK_COL(176u, 40u, 216u), + MK_COL(176u, 40u, 40u), + MK_COL(176u, 40u, 176u), + MK_COL(176u, 40u, 80u), + MK_COL(176u, 176u, 216u), + MK_COL(176u, 176u, 40u), + MK_COL(176u, 176u, 176u), + MK_COL(176u, 176u, 80u), + MK_COL(176u, 80u, 216u), + MK_COL(176u, 80u, 40u), + MK_COL(176u, 80u, 176u), + MK_COL(176u, 80u, 80u), + MK_COL(192u, 0u, 0u), + MK_COL(192u, 0u, 192u), + MK_COL(192u, 0u, 64u), + MK_COL(192u, 0u, 128u), + MK_COL(192u, 192u, 0u), + MK_COL(192u, 192u, 192u), + MK_COL(192u, 192u, 64u), + MK_COL(192u, 192u, 128u), + MK_COL(192u, 64u, 0u), + MK_COL(192u, 64u, 192u), + MK_COL(192u, 64u, 64u), + MK_COL(192u, 64u, 128u), + MK_COL(192u, 128u, 0u), + MK_COL(192u, 128u, 192u), + MK_COL(192u, 128u, 64u), + MK_COL(192u, 128u, 128u), + MK_COL(64u, 0u, 0u), + MK_COL(64u, 0u, 192u), + MK_COL(64u, 0u, 64u), + MK_COL(64u, 0u, 128u), + MK_COL(64u, 192u, 0u), + MK_COL(64u, 192u, 192u), + MK_COL(64u, 192u, 64u), + MK_COL(64u, 192u, 128u), + MK_COL(64u, 64u, 0u), + MK_COL(64u, 64u, 192u), + MK_COL(64u, 64u, 64u), + MK_COL(64u, 64u, 128u), + MK_COL(64u, 128u, 0u), + MK_COL(64u, 128u, 192u), + MK_COL(64u, 128u, 64u), + MK_COL(64u, 128u, 128u), + MK_COL(128u, 0u, 0u), + MK_COL(128u, 0u, 192u), + MK_COL(128u, 0u, 64u), + MK_COL(128u, 0u, 128u), + MK_COL(128u, 192u, 0u), + MK_COL(128u, 192u, 192u), + MK_COL(128u, 192u, 64u), + MK_COL(128u, 192u, 128u), + MK_COL(128u, 64u, 0u), + MK_COL(128u, 64u, 192u), + MK_COL(128u, 64u, 64u), + MK_COL(128u, 64u, 128u), + MK_COL(128u, 128u, 0u), + MK_COL(128u, 128u, 192u), + MK_COL(128u, 128u, 64u), + MK_COL(128u, 128u, 128u), +}; + +#undef MK_COL + +//------------------------------------------------------------------------------ +// TODO(skal): move the functions to dsp/lossless.c when the correct +// granularity is found. For now, we'll just copy-paste some useful bits +// here instead. + +// 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 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; +} + +// Delta palettization functions. +static WEBP_INLINE int Square(int x) { + return x * x; +} + +static WEBP_INLINE uint32_t Intensity(uint32_t a) { + return + 30 * ((a >> 16) & 0xff) + + 59 * ((a >> 8) & 0xff) + + 11 * ((a >> 0) & 0xff); +} + +static uint32_t CalcDist(uint32_t predicted_value, uint32_t actual_value, + uint32_t palette_entry) { + int i; + uint32_t distance = 0; + AddPixelsEq(&predicted_value, palette_entry); + for (i = 0; i < 32; i += 8) { + const int32_t av = (actual_value >> i) & 0xff; + const int32_t pv = (predicted_value >> i) & 0xff; + distance += Square(pv - av); + } + // We sum square of intensity difference with factor 10, but because Intensity + // returns 100 times real intensity we need to multiply differences of colors + // by 1000. + distance *= 1000u; + distance += Square(Intensity(predicted_value) + - Intensity(actual_value)); + return distance; +} + +static uint32_t Predict(int x, int y, uint32_t* image) { + const uint32_t t = (y == 0) ? ARGB_BLACK : image[x]; + const uint32_t l = (x == 0) ? ARGB_BLACK : image[x - 1]; + const uint32_t p = + (((((t >> 24) & 0xff) + ((l >> 24) & 0xff)) / 2) << 24) + + (((((t >> 16) & 0xff) + ((l >> 16) & 0xff)) / 2) << 16) + + (((((t >> 8) & 0xff) + ((l >> 8) & 0xff)) / 2) << 8) + + (((((t >> 0) & 0xff) + ((l >> 0) & 0xff)) / 2) << 0); + if (x == 0 && y == 0) return ARGB_BLACK; + if (x == 0) return t; + if (y == 0) return l; + return p; +} + +static WEBP_INLINE int AddSubtractComponentFullWithCoefficient( + int a, int b, int c) { + return Clip255(a + ((b - c) >> 2)); +} + +static WEBP_INLINE uint32_t ClampedAddSubtractFullWithCoefficient( + uint32_t c0, uint32_t c1, uint32_t c2) { + const int a = AddSubtractComponentFullWithCoefficient( + c0 >> 24, c1 >> 24, c2 >> 24); + const int r = AddSubtractComponentFullWithCoefficient((c0 >> 16) & 0xff, + (c1 >> 16) & 0xff, + (c2 >> 16) & 0xff); + const int g = AddSubtractComponentFullWithCoefficient((c0 >> 8) & 0xff, + (c1 >> 8) & 0xff, + (c2 >> 8) & 0xff); + const int b = AddSubtractComponentFullWithCoefficient( + c0 & 0xff, c1 & 0xff, c2 & 0xff); + return ((uint32_t)a << 24) | (r << 16) | (g << 8) | b; +} + +//------------------------------------------------------------------------------ + +// Find palette entry with minimum error from difference of actual pixel value +// and predicted pixel value. Propagate error of pixel to its top and left pixel +// in src array. Write predicted_value + palette_entry to new_image. Return +// index of best palette entry. +static int FindBestPaletteEntry(uint32_t src, uint32_t predicted_value, + const uint32_t palette[], int palette_size) { + int i; + int idx = 0; + uint32_t best_distance = CalcDist(predicted_value, src, palette[0]); + for (i = 1; i < palette_size; ++i) { + const uint32_t distance = CalcDist(predicted_value, src, palette[i]); + if (distance < best_distance) { + best_distance = distance; + idx = i; + } + } + return idx; +} + +static void ApplyBestPaletteEntry(int x, int y, + uint32_t new_value, uint32_t palette_value, + uint32_t* src, int src_stride, + uint32_t* new_image) { + AddPixelsEq(&new_value, palette_value); + if (x > 0) { + src[x - 1] = ClampedAddSubtractFullWithCoefficient(src[x - 1], + new_value, src[x]); + } + if (y > 0) { + src[x - src_stride] = + ClampedAddSubtractFullWithCoefficient(src[x - src_stride], + new_value, src[x]); + } + new_image[x] = new_value; +} + +//------------------------------------------------------------------------------ +// Main entry point + +static WebPEncodingError ApplyDeltaPalette(uint32_t* src, uint32_t* dst, + uint32_t src_stride, + uint32_t dst_stride, + const uint32_t* palette, + int palette_size, + int width, int height, + int num_passes) { + int x, y; + WebPEncodingError err = VP8_ENC_OK; + uint32_t* new_image = (uint32_t*)WebPSafeMalloc(width, sizeof(*new_image)); + uint8_t* const tmp_row = (uint8_t*)WebPSafeMalloc(width, sizeof(*tmp_row)); + if (new_image == NULL || tmp_row == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + while (num_passes--) { + uint32_t* cur_src = src; + uint32_t* cur_dst = dst; + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + const uint32_t predicted_value = Predict(x, y, new_image); + tmp_row[x] = FindBestPaletteEntry(cur_src[x], predicted_value, + palette, palette_size); + ApplyBestPaletteEntry(x, y, predicted_value, palette[tmp_row[x]], + cur_src, src_stride, new_image); + } + for (x = 0; x < width; ++x) { + cur_dst[x] = palette[tmp_row[x]]; + } + cur_src += src_stride; + cur_dst += dst_stride; + } + } + Error: + WebPSafeFree(new_image); + WebPSafeFree(tmp_row); + return err; +} + +// replaces enc->argb_ by a palettizable approximation of it, +// and generates optimal enc->palette_[] +WebPEncodingError WebPSearchOptimalDeltaPalette(VP8LEncoder* const enc) { + const WebPPicture* const pic = enc->pic_; + uint32_t* src = pic->argb; + uint32_t* dst = enc->argb_; + const int width = pic->width; + const int height = pic->height; + + WebPEncodingError err = VP8_ENC_OK; + memcpy(enc->palette_, kDeltaPalette, sizeof(kDeltaPalette)); + enc->palette_[DELTA_PALETTE_SIZE - 1] = src[0] - 0xff000000u; + enc->palette_size_ = DELTA_PALETTE_SIZE; + err = ApplyDeltaPalette(src, dst, pic->argb_stride, enc->current_width_, + enc->palette_, enc->palette_size_, + width, height, 2); + if (err != VP8_ENC_OK) goto Error; + + Error: + return err; +} + +#else // !WEBP_EXPERIMENTAL_FEATURES + +WebPEncodingError WebPSearchOptimalDeltaPalette(VP8LEncoder* const enc) { + (void)enc; + return VP8_ENC_ERROR_INVALID_CONFIGURATION; +} + +#endif // WEBP_EXPERIMENTAL_FEATURES diff --git a/thirdparty/libwebp/enc/delta_palettization.h b/thirdparty/libwebp/enc/delta_palettization.h new file mode 100644 index 0000000000..e41c0c5ab5 --- /dev/null +++ b/thirdparty/libwebp/enc/delta_palettization.h @@ -0,0 +1,25 @@ +// Copyright 2015 Google Inc. All Rights Reserved. +// +// 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: Mislav Bradac (mislavm@google.com) +// + +#ifndef WEBP_ENC_DELTA_PALETTIZATION_H_ +#define WEBP_ENC_DELTA_PALETTIZATION_H_ + +#include "../webp/encode.h" +#include "../enc/vp8li.h" + +// Replaces enc->argb_[] input by a palettizable approximation of it, +// and generates optimal enc->palette_[]. +// This function can revert enc->use_palette_ / enc->use_predict_ flag +// if delta-palettization is not producing expected saving. +WebPEncodingError WebPSearchOptimalDeltaPalette(VP8LEncoder* const enc); + +#endif // WEBP_ENC_DELTA_PALETTIZATION_H_ diff --git a/thirdparty/libwebp/enc/filter.c b/thirdparty/libwebp/enc/filter.c new file mode 100644 index 0000000000..e8ea8b4ff2 --- /dev/null +++ b/thirdparty/libwebp/enc/filter.c @@ -0,0 +1,306 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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" +#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]; +} + +//------------------------------------------------------------------------------ +// 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_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_ENC * sizeof(uint8_t)); + + if (enc->filter_hdr_.simple_ == 1) { // simple + VP8SimpleHFilter16i(y_dst, BPS, limit); + VP8SimpleVFilter16i(y_dst, BPS, limit); + } else { // complex + const int hev_thresh = (level >= 40) ? 2 : (level >= 15) ? 1 : 0; + 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); + } +} + +//------------------------------------------------------------------------------ +// SSIM metric + +static const double kMinValue = 1.e-10; // minimal threshold + +void VP8SSIMAddStats(const VP8DistoStats* const src, VP8DistoStats* 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; +} + +double VP8SSIMGet(const VP8DistoStats* 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 VP8DistoStats* 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; +} + +#define LIMIT(A, M) ((A) > (M) ? (M) : (A)) +static void VP8SSIMAccumulateRow(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int y, int W, int H, + VP8DistoStats* const stats) { + int x = 0; + const int w0 = LIMIT(VP8_SSIM_KERNEL, W); + for (x = 0; x < w0; ++x) { + VP8SSIMAccumulateClipped(src1, stride1, src2, stride2, x, y, W, H, stats); + } + for (; x <= W - 8 + VP8_SSIM_KERNEL; ++x) { + VP8SSIMAccumulate( + src1 + (y - VP8_SSIM_KERNEL) * stride1 + (x - VP8_SSIM_KERNEL), stride1, + src2 + (y - VP8_SSIM_KERNEL) * stride2 + (x - VP8_SSIM_KERNEL), stride2, + stats); + } + for (; x < W; ++x) { + VP8SSIMAccumulateClipped(src1, stride1, src2, stride2, x, y, W, H, stats); + } +} + +void VP8SSIMAccumulatePlane(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int W, int H, VP8DistoStats* const stats) { + int x, y; + const int h0 = LIMIT(VP8_SSIM_KERNEL, H); + const int h1 = LIMIT(VP8_SSIM_KERNEL, H - VP8_SSIM_KERNEL); + for (y = 0; y < h0; ++y) { + for (x = 0; x < W; ++x) { + VP8SSIMAccumulateClipped(src1, stride1, src2, stride2, x, y, W, H, stats); + } + } + for (; y < h1; ++y) { + VP8SSIMAccumulateRow(src1, stride1, src2, stride2, y, W, H, stats); + } + for (; y < H; ++y) { + for (x = 0; x < W; ++x) { + VP8SSIMAccumulateClipped(src1, stride1, src2, stride2, x, y, W, H, stats); + } + } +} +#undef LIMIT + +static double GetMBSSIM(const uint8_t* yuv1, const uint8_t* yuv2) { + int x, y; + VP8DistoStats s = { .0, .0, .0, .0, .0, .0 }; + + // compute SSIM in a 10 x 10 window + for (y = VP8_SSIM_KERNEL; y < 16 - VP8_SSIM_KERNEL; y++) { + for (x = VP8_SSIM_KERNEL; x < 16 - VP8_SSIM_KERNEL; x++) { + VP8SSIMAccumulateClipped(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++) { + VP8SSIMAccumulateClipped(yuv1 + U_OFF_ENC, BPS, yuv2 + U_OFF_ENC, BPS, + x, y, 8, 8, &s); + VP8SSIMAccumulateClipped(yuv1 + V_OFF_ENC, BPS, yuv2 + V_OFF_ENC, 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) { + 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; + } + } + VP8SSIMDspInit(); + } +} + +void VP8StoreFilterStats(VP8EncIterator* const it) { + int d; + VP8Encoder* const enc = it->enc_; + const int s = it->mb_->segment_; + const int level0 = enc->dqm_[s].fstrength_; + + // explore +/-quant range of values around level0 + 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_ == NULL) 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) { + VP8Encoder* const enc = it->enc_; + 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; + } + } 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; + } +} + +// ----------------------------------------------------------------------------- diff --git a/thirdparty/libwebp/enc/frame.c b/thirdparty/libwebp/enc/frame.c new file mode 100644 index 0000000000..5b7a40b9ad --- /dev/null +++ b/thirdparty/libwebp/enc/frame.c @@ -0,0 +1,850 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 <string.h> +#include <math.h> + +#include "./cost.h" +#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 + +//------------------------------------------------------------------------------ +// 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 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) { + VP8EncProba* 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) { + VP8EncProba* 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; +} + +// 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 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; + 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; +} + +//------------------------------------------------------------------------------ +// Finalize Segment probability based on the coding tree + +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 +} + +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 != NULL) { + 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; + } +} + +//------------------------------------------------------------------------------ +// Coefficient coding + +static int PutCoeffs(VP8BitWriter* const bw, int ctx, const VP8Residual* res) { + int n = res->first; + // 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; + } + + 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)) { // VP8Cat3 (3b) + VP8PutBit(bw, 0, p[8]); + VP8PutBit(bw, 0, p[9]); + v -= 3 + (8 << 0); + mask = 1 << 2; + 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 = 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 = VP8Cat5; + } else { // VP8Cat6 (11b) + VP8PutBit(bw, 1, p[8]); + VP8PutBit(bw, 1, p[10]); + v -= 3 + (8 << 3); + mask = 1 << 10; + tab = VP8Cat6; + } + 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) { + 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); + VP8InitResidual(1, 0, enc, &res); + } else { + 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]; + 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 + 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); + 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 + VP8InitResidual(0, 1, enc, &res); + VP8SetResidualCoeffs(rd->y_dc_levels, &res); + it->top_nz_[8] = it->left_nz_[8] = + VP8RecordCoeffs(it->top_nz_[8] + it->left_nz_[8], &res); + VP8InitResidual(1, 0, enc, &res); + } else { + 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]; + VP8SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + it->top_nz_[x] = it->left_nz_[y] = VP8RecordCoeffs(ctx, &res); + } + } + + // U/V + 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); + it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = + VP8RecordCoeffs(ctx, &res); + } + } + } + + VP8IteratorBytesToNz(it); +} + +//------------------------------------------------------------------------------ +// Token buffer + +#if !defined(DISABLE_TOKEN_BUFFER) + +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 + 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 { + 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]; + VP8SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); + it->top_nz_[x] = it->left_nz_[y] = + VP8RecordCoeffTokens(ctx, res.coeff_type, + res.first, res.last, res.coeffs, tokens); + VP8RecordCoeffs(ctx, &res); + } + } + + // U/V + 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); + it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = + VP8RecordCoeffTokens(ctx, 2, + res.first, res.last, res.coeffs, tokens); + VP8RecordCoeffs(ctx, &res); + } + } + } + VP8IteratorBytesToNz(it); + return !tokens->error_; +} + +#endif // !DISABLE_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) { + 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; +} + +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_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; +} + +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; + } + case 7: *info = mb->alpha_; break; + default: *info = 0; break; + } + } +#if SEGMENT_VISU // visualize segments and prediction modes + 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 +} + +static double GetPSNR(uint64_t mse, uint64_t size) { + return (mse > 0 && size > 0) ? 10. * log10(255. * 255. * size / mse) : 99; +} + +//------------------------------------------------------------------------------ +// 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. + +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); + SetLoopParams(enc, s->q); + do { + 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_++; + } + 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 + 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_; + } + } + + if (ok) { // All good. Finish up. + 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); + } + } + } + VP8AdjustFilterStrength(it); // ...and store filter stats. + } else { + // Something bad happened -> need to do some memory cleanup. + VP8EncFreeBitWriters(enc); + } + return ok; +} + +//------------------------------------------------------------------------------ +// 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) { + VP8EncIterator it; + int ok = PreLoopInitialize(enc); + if (!ok) return 0; + + StatLoop(enc); // stats-collection loop + + VP8IteratorInit(enc, &it); + VP8InitFilter(&it); + do { + VP8ModeScore info; + 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); + } + StoreSideInfo(&it); + VP8StoreFilterStats(&it); + VP8IteratorExport(&it); + ok = VP8IteratorProgress(&it, 20); + VP8IteratorSaveBoundary(&it); + } while (ok && VP8IteratorNext(&it)); + + return PostLoopFinalize(&it, ok); +} + +//------------------------------------------------------------------------------ +// Single pass using Token Buffer. + +#if !defined(DISABLE_TOKEN_BUFFER) + +#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) + } + 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; + } + 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 + } + } + 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 + +//------------------------------------------------------------------------------ + diff --git a/thirdparty/libwebp/enc/histogram.c b/thirdparty/libwebp/enc/histogram.c new file mode 100644 index 0000000000..395372b245 --- /dev/null +++ b/thirdparty/libwebp/enc/histogram.c @@ -0,0 +1,937 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 "../webp/config.h" +#endif + +#include <math.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) { + 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) { + VP8LRefsCursor c = VP8LRefsCursorInit(refs); + while (VP8LRefsCursorOk(&c)) { + VP8LHistogramAddSinglePixOrCopy(histo, c.cur_pos); + VP8LRefsCursorNext(&c); + } +} + +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); +} + +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; + 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; + + set = (VP8LHistogramSet*)memory; + memory += sizeof(*set); + set->histograms = (VP8LHistogram**)memory; + memory += size * sizeof(*set->histograms); + set->max_size = size; + set->size = size; + for (i = 0; i < size; ++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; +} + +// ----------------------------------------------------------------------------- + +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)) { + const int literal_ix = + NUM_LITERAL_CODES + NUM_LENGTH_CODES + PixOrCopyCacheIdx(v); + ++histo->literal_[literal_ix]; + } else { + 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]; + } +} + +// ----------------------------------------------------------------------------- +// Entropy-related functions. + +static WEBP_INLINE double BitsEntropyRefine(const VP8LBitEntropy* entropy) { + double mix; + if (entropy->nonzeros < 5) { + if (entropy->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 (entropy->nonzeros == 2) { + return 0.99 * entropy->sum + 0.01 * entropy->entropy; + } + // 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 (entropy->nonzeros == 3) { + mix = 0.95; + } else { + mix = 0.7; // nonzeros == 4. + } + } else { + mix = 0.627; + } + + { + double min_limit = 2 * entropy->sum - entropy->max_val; + min_limit = mix * min_limit + (1.0 - mix) * entropy->entropy; + return (entropy->entropy < min_limit) ? min_limit : entropy->entropy; + } +} + +double VP8LBitsEntropy(const uint32_t* const array, int n, + uint32_t* const trivial_symbol) { + VP8LBitEntropy entropy; + VP8LBitsEntropyUnrefined(array, n, &entropy); + if (trivial_symbol != NULL) { + *trivial_symbol = + (entropy.nonzeros == 1) ? entropy.nonzero_code : VP8L_NON_TRIVIAL_SYM; + } + + return BitsEntropyRefine(&entropy); +} + +static double InitialHuffmanCost(void) { + // 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; + return kHuffmanCodeOfHuffmanCodeSize - kSmallBias; +} + +// Finalize the Huffman cost based on streak numbers and length type (<3 or >=3) +static double FinalHuffmanCost(const VP8LStreaks* const stats) { + double retval = InitialHuffmanCost(); + retval += stats->counts[0] * 1.5625 + 0.234375 * stats->streaks[0][1]; + retval += stats->counts[1] * 2.578125 + 0.703125 * stats->streaks[1][1]; + retval += 1.796875 * stats->streaks[0][0]; + retval += 3.28125 * stats->streaks[1][0]; + return retval; +} + +// Get the symbol entropy for the distribution 'population'. +// Set 'trivial_sym', if there's only one symbol present in the distribution. +static double PopulationCost(const uint32_t* const population, int length, + uint32_t* const trivial_sym) { + VP8LBitEntropy bit_entropy; + VP8LStreaks stats; + VP8LGetEntropyUnrefined(population, length, &bit_entropy, &stats); + if (trivial_sym != NULL) { + *trivial_sym = (bit_entropy.nonzeros == 1) ? bit_entropy.nonzero_code + : VP8L_NON_TRIVIAL_SYM; + } + + return BitsEntropyRefine(&bit_entropy) + FinalHuffmanCost(&stats); +} + +static WEBP_INLINE double GetCombinedEntropy(const uint32_t* const X, + const uint32_t* const Y, + int length) { + VP8LBitEntropy bit_entropy; + VP8LStreaks stats; + VP8LGetCombinedEntropyUnrefined(X, Y, length, &bit_entropy, &stats); + + return BitsEntropyRefine(&bit_entropy) + FinalHuffmanCost(&stats); +} + +// Estimates the Entropy + Huffman + other block overhead size cost. +double VP8LHistogramEstimateBits(const VP8LHistogram* const p) { + return + PopulationCost( + p->literal_, VP8LHistogramNumCodes(p->palette_code_bits_), NULL) + + PopulationCost(p->red_, NUM_LITERAL_CODES, NULL) + + PopulationCost(p->blue_, NUM_LITERAL_CODES, NULL) + + PopulationCost(p->alpha_, NUM_LITERAL_CODES, NULL) + + PopulationCost(p->distance_, NUM_DISTANCE_CODES, NULL) + + VP8LExtraCost(p->literal_ + NUM_LITERAL_CODES, NUM_LENGTH_CODES) + + VP8LExtraCost(p->distance_, NUM_DISTANCE_CODES); +} + +// ----------------------------------------------------------------------------- +// 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 += GetCombinedEntropy(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 += GetCombinedEntropy(a->red_, b->red_, NUM_LITERAL_CODES); + if (*cost > cost_threshold) return 0; + + *cost += GetCombinedEntropy(a->blue_, b->blue_, NUM_LITERAL_CODES); + if (*cost > cost_threshold) return 0; + + *cost += GetCombinedEntropy(a->alpha_, b->alpha_, NUM_LITERAL_CODES); + if (*cost > cost_threshold) return 0; + + *cost += GetCombinedEntropy(a->distance_, b->distance_, NUM_DISTANCE_CODES); + *cost += + VP8LExtraCostCombined(a->distance_, b->distance_, NUM_DISTANCE_CODES); + if (*cost > cost_threshold) return 0; + + return 1; +} + +// 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; + } + + return cost - sum_cost; +} + +// 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; +} + +// ----------------------------------------------------------------------------- + +// 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 = + PopulationCost(h->alpha_, NUM_LITERAL_CODES, &alpha_sym); + const double distance_cost = + PopulationCost(h->distance_, NUM_DISTANCE_CODES, NULL) + + VP8LExtraCost(h->distance_, NUM_DISTANCE_CODES); + const int num_codes = VP8LHistogramNumCodes(h->palette_code_bits_); + h->literal_cost_ = PopulationCost(h->literal_, num_codes, NULL) + + VP8LExtraCost(h->literal_ + NUM_LITERAL_CODES, + NUM_LENGTH_CODES); + h->red_cost_ = PopulationCost(h->red_, NUM_LITERAL_CODES, &red_sym); + h->blue_cost_ = PopulationCost(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); + } +} + +static int GetBinIdForEntropy(double min, double max, double val) { + const double range = max - min; + if (range > 0.) { + const double delta = val - min; + return (int)((NUM_PARTITIONS - 1e-6) * delta / range); + } else { + return 0; + } +} + +static int GetHistoBinIndex(const VP8LHistogram* const h, + const DominantCostRange* const c, int low_effort) { + int bin_id = GetBinIdForEntropy(c->literal_min_, c->literal_max_, + h->literal_cost_); + assert(bin_id < NUM_PARTITIONS); + if (!low_effort) { + bin_id = bin_id * NUM_PARTITIONS + + GetBinIdForEntropy(c->red_min_, c->red_max_, h->red_cost_); + bin_id = bin_id * NUM_PARTITIONS + + GetBinIdForEntropy(c->blue_min_, c->blue_max_, h->blue_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_histo->histograms; + VP8LRefsCursor c = VP8LRefsCursorInit(backward_refs); + assert(histo_bits > 0); + 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); + while (x >= xsize) { + 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) { + const VP8LHistogram* const histo = histograms[i]; + const int bin_id = GetHistoBinIndex(histo, &cost_range, low_effort); + 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. + const int 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) { + *seed *= 16807U; + if (*seed == 0) { + *seed = 1; + } + return *seed; +} + +// ----------------------------------------------------------------------------- +// 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* queue; + int size; + int max_size; +} HistoQueue; + +static int HistoQueueInit(HistoQueue* const histo_queue, const int max_index) { + histo_queue->size = 0; + // max_index^2 for the queue size is safe. If you look at + // HistogramCombineGreedy, and imagine that UpdateQueueFront always pushes + // data to the queue, you insert at most: + // - max_index*(max_index-1)/2 (the first two for loops) + // - max_index - 1 in the last for loop at the first iteration of the while + // loop, max_index - 2 at the second iteration ... therefore + // max_index*(max_index-1)/2 overall too + histo_queue->max_size = max_index * max_index; + // We allocate max_size + 1 because the last element at index "size" is + // used as temporary data (and it could be up to max_size). + histo_queue->queue = WebPSafeMalloc(histo_queue->max_size + 1, + sizeof(*histo_queue->queue)); + return histo_queue->queue != NULL; +} + +static void HistoQueueClear(HistoQueue* const histo_queue) { + assert(histo_queue != NULL); + WebPSafeFree(histo_queue->queue); +} + +static void SwapHistogramPairs(HistogramPair *p1, + HistogramPair *p2) { + const HistogramPair tmp = *p1; + *p1 = *p2; + *p2 = tmp; +} + +// Given a valid priority queue in range [0, queue_size) this function checks +// whether histo_queue[queue_size] should be accepted and swaps it with the +// front if it is smaller. Otherwise, it leaves it as is. +static void UpdateQueueFront(HistoQueue* const histo_queue) { + if (histo_queue->queue[histo_queue->size].cost_diff >= 0) return; + + if (histo_queue->queue[histo_queue->size].cost_diff < + histo_queue->queue[0].cost_diff) { + SwapHistogramPairs(histo_queue->queue, + histo_queue->queue + histo_queue->size); + } + ++histo_queue->size; + + // We cannot add more elements than the capacity. + // The allocation adds an extra element to the official capacity so that + // histo_queue->queue[histo_queue->max_size] is read/written within bound. + assert(histo_queue->size <= histo_queue->max_size); +} + +// ----------------------------------------------------------------------------- + +static void PreparePair(VP8LHistogram** histograms, int idx1, int idx2, + HistogramPair* const pair) { + VP8LHistogram* h1; + VP8LHistogram* h2; + double sum_cost; + + if (idx1 > idx2) { + const int tmp = idx2; + idx2 = idx1; + idx1 = tmp; + } + pair->idx1 = idx1; + pair->idx2 = idx2; + h1 = histograms[idx1]; + h2 = histograms[idx2]; + sum_cost = h1->bit_cost_ + h2->bit_cost_; + pair->cost_combo = 0.; + GetCombinedHistogramEntropy(h1, h2, sum_cost, &pair->cost_combo); + pair->cost_diff = pair->cost_combo - sum_cost; +} + +// Combines histograms by continuously choosing the one with the highest cost +// reduction. +static int HistogramCombineGreedy(VP8LHistogramSet* const image_histo) { + int ok = 0; + 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)); + // Priority queue of histogram pairs. + HistoQueue histo_queue; + + if (!HistoQueueInit(&histo_queue, 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. + PreparePair(histograms, i, j, &histo_queue.queue[histo_queue.size]); + UpdateQueueFront(&histo_queue); + } + } + + while (image_histo_size > 1 && histo_queue.size > 0) { + HistogramPair* copy_to; + const int idx1 = histo_queue.queue[0].idx1; + const int idx2 = histo_queue.queue[0].idx2; + VP8LHistogramAdd(histograms[idx2], histograms[idx1], histograms[idx1]); + histograms[idx1]->bit_cost_ = histo_queue.queue[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; + + // Remove pairs intersecting the just combined best pair. This will + // therefore pop the head of the queue. + copy_to = histo_queue.queue; + for (i = 0; i < histo_queue.size; ++i) { + HistogramPair* const p = histo_queue.queue + i; + if (p->idx1 == idx1 || p->idx2 == idx1 || + p->idx1 == idx2 || p->idx2 == idx2) { + // Do not copy the invalid pair. + continue; + } + if (p->cost_diff < histo_queue.queue[0].cost_diff) { + // Replace the top of the queue if we found better. + SwapHistogramPairs(histo_queue.queue, p); + } + SwapHistogramPairs(copy_to, p); + ++copy_to; + } + histo_queue.size = (int)(copy_to - histo_queue.queue); + + // Push new pairs formed with combined histogram to the queue. + for (i = 0; i < image_histo_size; ++i) { + if (clusters[i] != idx1) { + PreparePair(histograms, idx1, clusters[i], + &histo_queue.queue[histo_queue.size]); + UpdateQueueFront(&histo_queue); + } + } + } + // 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); + HistoQueueClear(&histo_queue); + return ok; +} + +static void 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; + 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 = -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_tries; ++j) { + double curr_cost_diff; + // Choose two histograms at random and try to combine them. + 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; + } + + // Calculate cost reduction on combining. + 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_idx1 >= 0) { + HistogramSwap(&best_combo, &histograms[best_idx1]); + // swap best_idx2 slot with last one (which is now unused) + --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 >= num_tries_no_success) { + break; + } + } + image_histo->size = image_histo_size; +} + +// ----------------------------------------------------------------------------- +// Histogram refinement + +// 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; + VP8LHistogram** const in_histo = in->histograms; + VP8LHistogram** const out_histo = out->histograms; + const int in_size = in->size; + const int out_size = out->size; + if (out_size > 1) { + for (i = 0; i < in_size; ++i) { + int best_out = 0; + double best_bits = MAX_COST; + int k; + for (k = 0; k < out_size; ++k) { + const double cur_bits = + HistogramAddThresh(out_histo[k], in_histo[i], best_bits); + if (k == 0 || cur_bits < best_bits) { + best_bits = cur_bits; + best_out = k; + } + } + symbols[i] = best_out; + } + } else { + assert(out_size == 1); + for (i = 0; i < in_size; ++i) { + symbols[i] = 0; + } + } + + // Recompute each out based on raw and symbols. + for (i = 0; i < out_size; ++i) { + HistogramClear(out_histo[i]); + } + + for (i = 0; i < in_size; ++i) { + const int idx = symbols[i]; + VP8LHistogramAdd(in_histo[i], out_histo[idx], out_histo[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 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 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)); + HistogramCombineStochastic(image_histo, tmp_histos->histograms[0], + cur_combo, quality, threshold_size); + if ((image_histo->size <= threshold_size) && + !HistogramCombineGreedy(image_histo)) { + goto Error; + } + } + + // TODO(vikasa): Optimize HistogramRemap for low-effort compression mode also. + // Find the optimal map from original histograms to the final ones. + HistogramRemap(orig_histo, image_histo, histogram_symbols); + + ok = 1; + + Error: + WebPSafeFree(bin_map); + VP8LFreeHistogramSet(orig_histo); + return ok; +} diff --git a/thirdparty/libwebp/enc/histogram.h b/thirdparty/libwebp/enc/histogram.h new file mode 100644 index 0000000000..d303d1d58b --- /dev/null +++ b/thirdparty/libwebp/enc/histogram.h @@ -0,0 +1,123 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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) +// +// Models the histograms of literal and distance codes. + +#ifndef WEBP_ENC_HISTOGRAM_H_ +#define WEBP_ENC_HISTOGRAM_H_ + +#include <string.h> + +#include "./backward_references.h" +#include "../webp/format_constants.h" +#include "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// Not a trivial literal symbol. +#define VP8L_NON_TRIVIAL_SYM (0xffffffff) + +// A simple container for histograms of data. +typedef struct { + // literal_ contains green literal, palette-code and + // copy-length-prefix histogram + 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. + uint32_t distance_[NUM_DISTANCE_CODES]; + int palette_code_bits_; + 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 calling WebPSafeFree(). +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); + +// 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); + +// Collect all the references into a histogram (without reset) +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); + +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 low_effort, + int histogram_bits, int cache_bits, + VP8LHistogramSet* const image_in, + VP8LHistogramSet* const tmp_histos, + uint16_t* const histogram_symbols); + +// Returns the entropy for the symbols in the input array. +// Also sets trivial_symbol to the code value, if the array has only one code +// value. Otherwise, set it to VP8L_NON_TRIVIAL_SYM. +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); + +#ifdef __cplusplus +} +#endif + +#endif // WEBP_ENC_HISTOGRAM_H_ diff --git a/thirdparty/libwebp/enc/iterator.c b/thirdparty/libwebp/enc/iterator.c new file mode 100644 index 0000000000..99d960a547 --- /dev/null +++ b/thirdparty/libwebp/enc/iterator.c @@ -0,0 +1,456 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <string.h> + +#include "./vp8enci.h" + +//------------------------------------------------------------------------------ +// VP8Iterator +//------------------------------------------------------------------------------ + +static void InitLeft(VP8EncIterator* const it) { + it->y_left_[-1] = it->u_left_[-1] = it->v_left_[-1] = + (it->y_ > 0) ? 129 : 127; + memset(it->y_left_, 129, 16); + memset(it->u_left_, 129, 8); + memset(it->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 VP8IteratorSetRow(VP8EncIterator* const it, int y) { + VP8Encoder* const enc = it->enc_; + it->x_ = 0; + 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->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; + 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 != NULL) { + const int done = it->count_down0_ - it->count_down_; + const int percent = (it->count_down0_ <= 0) + ? it->percent0_ + : it->percent0_ + delta * done / it->count_down0_; + 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 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; + 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; + } +} + +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 usrc = pic->u + (y * pic->uv_stride + x) * 8; + const uint8_t* const vsrc = pic->v + (y * pic->uv_stride + x) * 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); + } +} + +//------------------------------------------------------------------------------ +// 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_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; + 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 bookkeeping. + +void VP8IteratorSaveBoundary(VP8EncIterator* const it) { + VP8Encoder* const enc = it->enc_; + 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]; + } + 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); + } +} + +int VP8IteratorNext(VP8EncIterator* const it) { + it->preds_ += 4; + 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->count_down_); +} + +//------------------------------------------------------------------------------ +// 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] = it->y_left_[15 - i]; + } + for (i = 0; i < 16; ++i) { // top + 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] = it->y_top_[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; +} + +//------------------------------------------------------------------------------ + diff --git a/thirdparty/libwebp/enc/near_lossless.c b/thirdparty/libwebp/enc/near_lossless.c new file mode 100644 index 0000000000..f4ab91f571 --- /dev/null +++ b/thirdparty/libwebp/enc/near_lossless.c @@ -0,0 +1,122 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Near-lossless image preprocessing adjusts pixel values to help +// compressibility with a guarantee of maximum deviation between original and +// resulting pixel values. +// +// Author: Jyrki Alakuijala (jyrki@google.com) +// Converted to C by Aleksander Kramarz (akramarz@google.com) + +#include <assert.h> +#include <stdlib.h> + +#include "../dsp/lossless.h" +#include "../utils/utils.h" +#include "./vp8enci.h" + +#define MIN_DIM_FOR_NEAR_LOSSLESS 64 +#define MAX_LIMIT_BITS 5 + +// Quantizes the value up or down to a multiple of 1<<bits (or to 255), +// choosing the closer one, resolving ties using bankers' rounding. +static int FindClosestDiscretized(int a, int bits) { + const int mask = (1 << bits) - 1; + const int biased = a + (mask >> 1) + ((a >> bits) & 1); + assert(bits > 0); + if (biased > 0xff) return 0xff; + return biased & ~mask; +} + +// Applies FindClosestDiscretized to all channels of pixel. +static uint32_t ClosestDiscretizedArgb(uint32_t a, int bits) { + return + (FindClosestDiscretized(a >> 24, bits) << 24) | + (FindClosestDiscretized((a >> 16) & 0xff, bits) << 16) | + (FindClosestDiscretized((a >> 8) & 0xff, bits) << 8) | + (FindClosestDiscretized(a & 0xff, bits)); +} + +// Checks if distance between corresponding channel values of pixels a and b +// is within the given limit. +static int IsNear(uint32_t a, uint32_t b, int limit) { + int k; + for (k = 0; k < 4; ++k) { + const int delta = + (int)((a >> (k * 8)) & 0xff) - (int)((b >> (k * 8)) & 0xff); + if (delta >= limit || delta <= -limit) { + return 0; + } + } + return 1; +} + +static int IsSmooth(const uint32_t* const prev_row, + const uint32_t* const curr_row, + const uint32_t* const next_row, + int ix, int limit) { + // Check that all pixels in 4-connected neighborhood are smooth. + return (IsNear(curr_row[ix], curr_row[ix - 1], limit) && + IsNear(curr_row[ix], curr_row[ix + 1], limit) && + IsNear(curr_row[ix], prev_row[ix], limit) && + IsNear(curr_row[ix], next_row[ix], limit)); +} + +// Adjusts pixel values of image with given maximum error. +static void NearLossless(int xsize, int ysize, uint32_t* argb, + int limit_bits, uint32_t* copy_buffer) { + int x, y; + const int limit = 1 << limit_bits; + uint32_t* prev_row = copy_buffer; + uint32_t* curr_row = prev_row + xsize; + uint32_t* next_row = curr_row + xsize; + memcpy(copy_buffer, argb, xsize * 2 * sizeof(argb[0])); + + for (y = 1; y < ysize - 1; ++y) { + uint32_t* const curr_argb_row = argb + y * xsize; + uint32_t* const next_argb_row = curr_argb_row + xsize; + memcpy(next_row, next_argb_row, xsize * sizeof(argb[0])); + for (x = 1; x < xsize - 1; ++x) { + if (!IsSmooth(prev_row, curr_row, next_row, x, limit)) { + curr_argb_row[x] = ClosestDiscretizedArgb(curr_row[x], limit_bits); + } + } + { + // Three-way swap. + uint32_t* const temp = prev_row; + prev_row = curr_row; + curr_row = next_row; + next_row = temp; + } + } +} + +int VP8ApplyNearLossless(int xsize, int ysize, uint32_t* argb, int quality) { + int i; + uint32_t* const copy_buffer = + (uint32_t*)WebPSafeMalloc(xsize * 3, sizeof(*copy_buffer)); + const int limit_bits = VP8LNearLosslessBits(quality); + assert(argb != NULL); + assert(limit_bits >= 0); + assert(limit_bits <= MAX_LIMIT_BITS); + if (copy_buffer == NULL) { + return 0; + } + // For small icon images, don't attempt to apply near-lossless compression. + if (xsize < MIN_DIM_FOR_NEAR_LOSSLESS && ysize < MIN_DIM_FOR_NEAR_LOSSLESS) { + WebPSafeFree(copy_buffer); + return 1; + } + + for (i = limit_bits; i != 0; --i) { + NearLossless(xsize, ysize, argb, i, copy_buffer); + } + WebPSafeFree(copy_buffer); + return 1; +} diff --git a/thirdparty/libwebp/enc/picture.c b/thirdparty/libwebp/enc/picture.c new file mode 100644 index 0000000000..d9befbc47d --- /dev/null +++ b/thirdparty/libwebp/enc/picture.c @@ -0,0 +1,292 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 class basis +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> + +#include "./vp8enci.h" +#include "../dsp/dsp.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// 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; +} + +//------------------------------------------------------------------------------ + +static void WebPPictureResetBufferARGB(WebPPicture* const picture) { + picture->memory_argb_ = NULL; + picture->argb = NULL; + picture->argb_stride = 0; +} + +static void WebPPictureResetBufferYUVA(WebPPicture* const picture) { + picture->memory_ = NULL; + picture->y = picture->u = picture->v = picture->a = NULL; + picture->y_stride = picture->uv_stride = 0; + picture->a_stride = 0; +} + +void WebPPictureResetBuffers(WebPPicture* const picture) { + WebPPictureResetBufferARGB(picture); + WebPPictureResetBufferYUVA(picture); +} + +int WebPPictureAllocARGB(WebPPicture* const picture, int width, int height) { + void* memory; + const uint64_t argb_size = (uint64_t)width * height; + + assert(picture != NULL); + + WebPSafeFree(picture->memory_argb_); + WebPPictureResetBufferARGB(picture); + + if (width <= 0 || height <= 0) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_BAD_DIMENSION); + } + // allocate a new buffer. + memory = WebPSafeMalloc(argb_size, sizeof(*picture->argb)); + if (memory == NULL) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); + } + // TODO(skal): align plane to cache line? + picture->memory_argb_ = memory; + picture->argb = (uint32_t*)memory; + picture->argb_stride = width; + 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; + + assert(picture != NULL); + + WebPSafeFree(picture->memory_); + WebPPictureResetBufferYUVA(picture); + + if (uv_csp != WEBP_YUV420) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); + } + + // 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; + + // 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); + } + // allocate a new buffer. + mem = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*mem)); + if (mem == NULL) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); + } + + // 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; + + // 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 > 0) { + picture->a = mem; + mem += a_size; + } + (void)mem; // makes the static analyzer happy + return 1; +} + +int WebPPictureAlloc(WebPPicture* picture) { + if (picture != NULL) { + const int width = picture->width; + const int height = picture->height; + + WebPPictureFree(picture); // erase previous buffer + + if (!picture->use_argb) { + return WebPPictureAllocYUVA(picture, width, height); + } else { + return WebPPictureAllocARGB(picture, width, height); + } + } + return 1; +} + +void WebPPictureFree(WebPPicture* picture) { + if (picture != NULL) { + WebPSafeFree(picture->memory_); + WebPSafeFree(picture->memory_argb_); + WebPPictureResetBuffers(picture); + } +} + +//------------------------------------------------------------------------------ +// 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); + } + WebPSafeFree(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; +} + +void WebPMemoryWriterClear(WebPMemoryWriter* writer) { + if (writer != NULL) { + WebPSafeFree(writer->mem); + writer->mem = NULL; + writer->size = 0; + writer->max_size = 0; + } +} + +//------------------------------------------------------------------------------ +// 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 (output == NULL) return 0; + + 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) { + WebPMemoryWriterClear(&wrt); + *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 + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/enc/picture_csp.c b/thirdparty/libwebp/enc/picture_csp.c new file mode 100644 index 0000000000..607a6240b0 --- /dev/null +++ b/thirdparty/libwebp/enc/picture_csp.c @@ -0,0 +1,1168 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 for colorspace conversion +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include <math.h> + +#include "./vp8enci.h" +#include "../utils/random.h" +#include "../utils/utils.h" +#include "../dsp/yuv.h" + +// Uncomment to disable gamma-compression during RGB->U/V averaging +#define USE_GAMMA_COMPRESSION + +// If defined, use table to compute x / alpha. +#define USE_INVERSE_ALPHA_TABLE + +static const union { + uint32_t argb; + uint8_t bytes[4]; +} test_endian = { 0xff000000u }; +#define ALPHA_IS_LAST (test_endian.bytes[3] == 0xff) + +//------------------------------------------------------------------------------ +// 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; +} + +//------------------------------------------------------------------------------ +// Code for gamma correction + +#if defined(USE_GAMMA_COMPRESSION) + +// gamma-compensates loss of resolution during chroma subsampling +#define kGamma 0.80 // for now we use a different gamma value than kGammaF +#define kGammaFix 12 // fixed-point precision for linear values +#define kGammaScale ((1 << kGammaFix) - 1) +#define kGammaTabFix 7 // fixed-point fractional bits precision +#define kGammaTabScale (1 << kGammaTabFix) +#define kGammaTabRounder (kGammaTabScale >> 1) +#define kGammaTabSize (1 << (kGammaFix - kGammaTabFix)) + +static int kLinearToGammaTab[kGammaTabSize + 1]; +static uint16_t kGammaToLinearTab[256]; +static volatile int kGammaTablesOk = 0; + +static WEBP_TSAN_IGNORE_FUNCTION void InitGammaTables(void) { + if (!kGammaTablesOk) { + int v; + const double scale = (double)(1 << kGammaTabFix) / kGammaScale; + const double norm = 1. / 255.; + for (v = 0; v <= 255; ++v) { + kGammaToLinearTab[v] = + (uint16_t)(pow(norm * v, kGamma) * kGammaScale + .5); + } + for (v = 0; v <= kGammaTabSize; ++v) { + kLinearToGammaTab[v] = (int)(255. * pow(scale * v, 1. / kGamma) + .5); + } + kGammaTablesOk = 1; + } +} + +static WEBP_INLINE uint32_t GammaToLinear(uint8_t v) { + return kGammaToLinearTab[v]; +} + +static WEBP_INLINE int Interpolate(int v) { + const int tab_pos = v >> (kGammaTabFix + 2); // integer part + const int x = v & ((kGammaTabScale << 2) - 1); // fractional part + const int v0 = kLinearToGammaTab[tab_pos]; + const int v1 = kLinearToGammaTab[tab_pos + 1]; + const int y = v1 * x + v0 * ((kGammaTabScale << 2) - x); // interpolate + assert(tab_pos + 1 < kGammaTabSize + 1); + return y; +} + +// Convert a linear value 'v' to YUV_FIX+2 fixed-point precision +// U/V value, suitable for RGBToU/V calls. +static WEBP_INLINE int LinearToGamma(uint32_t base_value, int shift) { + const int y = Interpolate(base_value << shift); // final uplifted value + return (y + kGammaTabRounder) >> kGammaTabFix; // descale +} + +#else + +static WEBP_TSAN_IGNORE_FUNCTION void InitGammaTables(void) {} +static WEBP_INLINE uint32_t GammaToLinear(uint8_t v) { return v; } +static WEBP_INLINE int LinearToGamma(uint32_t base_value, int shift) { + return (int)(base_value << shift); +} + +#endif // USE_GAMMA_COMPRESSION + +//------------------------------------------------------------------------------ +// RGB -> YUV conversion + +static int RGBToY(int r, int g, int b, VP8Random* const rg) { + return (rg == NULL) ? VP8RGBToY(r, g, b, YUV_HALF) + : VP8RGBToY(r, g, b, VP8RandomBits(rg, YUV_FIX)); +} + +static int RGBToU(int r, int g, int b, VP8Random* const rg) { + return (rg == NULL) ? VP8RGBToU(r, g, b, YUV_HALF << 2) + : VP8RGBToU(r, g, b, VP8RandomBits(rg, YUV_FIX + 2)); +} + +static int RGBToV(int r, int g, int b, VP8Random* const rg) { + return (rg == NULL) ? VP8RGBToV(r, g, b, YUV_HALF << 2) + : VP8RGBToV(r, g, b, VP8RandomBits(rg, YUV_FIX + 2)); +} + +//------------------------------------------------------------------------------ +// Smart RGB->YUV conversion + +static const int kNumIterations = 6; +static const int kMinDimensionIterativeConversion = 4; + +// We could use SFIX=0 and only uint8_t for fixed_y_t, but it produces some +// banding sometimes. Better use extra precision. +#define SFIX 2 // fixed-point precision of RGB and Y/W +typedef int16_t fixed_t; // signed type with extra SFIX precision for UV +typedef uint16_t fixed_y_t; // unsigned type with extra SFIX precision for W + +#define SHALF (1 << SFIX >> 1) +#define MAX_Y_T ((256 << SFIX) - 1) +#define SROUNDER (1 << (YUV_FIX + SFIX - 1)) + +#if defined(USE_GAMMA_COMPRESSION) + +// float variant of gamma-correction +// We use tables of different size and precision, along with a 'real-world' +// Gamma value close to ~2. +#define kGammaF 2.2 +static float kGammaToLinearTabF[MAX_Y_T + 1]; // size scales with Y_FIX +static float kLinearToGammaTabF[kGammaTabSize + 2]; +static volatile int kGammaTablesFOk = 0; + +static WEBP_TSAN_IGNORE_FUNCTION void InitGammaTablesF(void) { + if (!kGammaTablesFOk) { + int v; + const double norm = 1. / MAX_Y_T; + const double scale = 1. / kGammaTabSize; + for (v = 0; v <= MAX_Y_T; ++v) { + kGammaToLinearTabF[v] = (float)pow(norm * v, kGammaF); + } + for (v = 0; v <= kGammaTabSize; ++v) { + kLinearToGammaTabF[v] = (float)(MAX_Y_T * pow(scale * v, 1. / kGammaF)); + } + // to prevent small rounding errors to cause read-overflow: + kLinearToGammaTabF[kGammaTabSize + 1] = kLinearToGammaTabF[kGammaTabSize]; + kGammaTablesFOk = 1; + } +} + +static WEBP_INLINE float GammaToLinearF(int v) { + return kGammaToLinearTabF[v]; +} + +static WEBP_INLINE int LinearToGammaF(float value) { + const float v = value * kGammaTabSize; + const int tab_pos = (int)v; + const float x = v - (float)tab_pos; // fractional part + const float v0 = kLinearToGammaTabF[tab_pos + 0]; + const float v1 = kLinearToGammaTabF[tab_pos + 1]; + const float y = v1 * x + v0 * (1.f - x); // interpolate + return (int)(y + .5); +} + +#else + +static WEBP_TSAN_IGNORE_FUNCTION void InitGammaTablesF(void) {} +static WEBP_INLINE float GammaToLinearF(int v) { + const float norm = 1.f / MAX_Y_T; + return norm * v; +} +static WEBP_INLINE int LinearToGammaF(float value) { + return (int)(MAX_Y_T * value + .5); +} + +#endif // USE_GAMMA_COMPRESSION + +//------------------------------------------------------------------------------ + +static uint8_t clip_8b(fixed_t v) { + return (!(v & ~0xff)) ? (uint8_t)v : (v < 0) ? 0u : 255u; +} + +static fixed_y_t clip_y(int y) { + return (!(y & ~MAX_Y_T)) ? (fixed_y_t)y : (y < 0) ? 0 : MAX_Y_T; +} + +//------------------------------------------------------------------------------ + +static int RGBToGray(int r, int g, int b) { + const int luma = 19595 * r + 38470 * g + 7471 * b + YUV_HALF; + return (luma >> YUV_FIX); +} + +static float RGBToGrayF(float r, float g, float b) { + return 0.299f * r + 0.587f * g + 0.114f * b; +} + +static int ScaleDown(int a, int b, int c, int d) { + const float A = GammaToLinearF(a); + const float B = GammaToLinearF(b); + const float C = GammaToLinearF(c); + const float D = GammaToLinearF(d); + return LinearToGammaF(0.25f * (A + B + C + D)); +} + +static WEBP_INLINE void UpdateW(const fixed_y_t* src, fixed_y_t* dst, int len) { + while (len-- > 0) { + const float R = GammaToLinearF(src[0]); + const float G = GammaToLinearF(src[1]); + const float B = GammaToLinearF(src[2]); + const float Y = RGBToGrayF(R, G, B); + *dst++ = (fixed_y_t)LinearToGammaF(Y); + src += 3; + } +} + +static int UpdateChroma(const fixed_y_t* src1, + const fixed_y_t* src2, + fixed_t* dst, fixed_y_t* tmp, int len) { + int diff = 0; + while (len--> 0) { + const int r = ScaleDown(src1[0], src1[3], src2[0], src2[3]); + const int g = ScaleDown(src1[1], src1[4], src2[1], src2[4]); + const int b = ScaleDown(src1[2], src1[5], src2[2], src2[5]); + const int W = RGBToGray(r, g, b); + const int r_avg = (src1[0] + src1[3] + src2[0] + src2[3] + 2) >> 2; + const int g_avg = (src1[1] + src1[4] + src2[1] + src2[4] + 2) >> 2; + const int b_avg = (src1[2] + src1[5] + src2[2] + src2[5] + 2) >> 2; + dst[0] = (fixed_t)(r - W); + dst[1] = (fixed_t)(g - W); + dst[2] = (fixed_t)(b - W); + dst += 3; + src1 += 6; + src2 += 6; + if (tmp != NULL) { + tmp[0] = tmp[1] = clip_y(W); + tmp += 2; + } + diff += abs(RGBToGray(r_avg, g_avg, b_avg) - W); + } + return diff; +} + +//------------------------------------------------------------------------------ + +static WEBP_INLINE int Filter(const fixed_t* const A, const fixed_t* const B, + int rightwise) { + int v; + if (!rightwise) { + v = (A[0] * 9 + A[-3] * 3 + B[0] * 3 + B[-3]); + } else { + v = (A[0] * 9 + A[+3] * 3 + B[0] * 3 + B[+3]); + } + return (v + 8) >> 4; +} + +static WEBP_INLINE int Filter2(int A, int B) { return (A * 3 + B + 2) >> 2; } + +//------------------------------------------------------------------------------ + +static WEBP_INLINE fixed_y_t UpLift(uint8_t a) { // 8bit -> SFIX + return ((fixed_y_t)a << SFIX) | SHALF; +} + +static void ImportOneRow(const uint8_t* const r_ptr, + const uint8_t* const g_ptr, + const uint8_t* const b_ptr, + int step, + int pic_width, + fixed_y_t* const dst) { + int i; + for (i = 0; i < pic_width; ++i) { + const int off = i * step; + dst[3 * i + 0] = UpLift(r_ptr[off]); + dst[3 * i + 1] = UpLift(g_ptr[off]); + dst[3 * i + 2] = UpLift(b_ptr[off]); + } + if (pic_width & 1) { // replicate rightmost pixel + memcpy(dst + 3 * pic_width, dst + 3 * (pic_width - 1), 3 * sizeof(*dst)); + } +} + +static void InterpolateTwoRows(const fixed_y_t* const best_y, + const fixed_t* const prev_uv, + const fixed_t* const cur_uv, + const fixed_t* const next_uv, + int w, + fixed_y_t* const out1, + fixed_y_t* const out2) { + int i, k; + { // special boundary case for i==0 + const int W0 = best_y[0]; + const int W1 = best_y[w]; + for (k = 0; k <= 2; ++k) { + out1[k] = clip_y(Filter2(cur_uv[k], prev_uv[k]) + W0); + out2[k] = clip_y(Filter2(cur_uv[k], next_uv[k]) + W1); + } + } + for (i = 1; i < w - 1; ++i) { + const int W0 = best_y[i + 0]; + const int W1 = best_y[i + w]; + const int off = 3 * (i >> 1); + for (k = 0; k <= 2; ++k) { + const int tmp0 = Filter(cur_uv + off + k, prev_uv + off + k, i & 1); + const int tmp1 = Filter(cur_uv + off + k, next_uv + off + k, i & 1); + out1[3 * i + k] = clip_y(tmp0 + W0); + out2[3 * i + k] = clip_y(tmp1 + W1); + } + } + { // special boundary case for i == w - 1 + const int W0 = best_y[i + 0]; + const int W1 = best_y[i + w]; + const int off = 3 * (i >> 1); + for (k = 0; k <= 2; ++k) { + out1[3 * i + k] = clip_y(Filter2(cur_uv[off + k], prev_uv[off + k]) + W0); + out2[3 * i + k] = clip_y(Filter2(cur_uv[off + k], next_uv[off + k]) + W1); + } + } +} + +static WEBP_INLINE uint8_t ConvertRGBToY(int r, int g, int b) { + const int luma = 16839 * r + 33059 * g + 6420 * b + SROUNDER; + return clip_8b(16 + (luma >> (YUV_FIX + SFIX))); +} + +static WEBP_INLINE uint8_t ConvertRGBToU(int r, int g, int b) { + const int u = -9719 * r - 19081 * g + 28800 * b + SROUNDER; + return clip_8b(128 + (u >> (YUV_FIX + SFIX))); +} + +static WEBP_INLINE uint8_t ConvertRGBToV(int r, int g, int b) { + const int v = +28800 * r - 24116 * g - 4684 * b + SROUNDER; + return clip_8b(128 + (v >> (YUV_FIX + SFIX))); +} + +static int ConvertWRGBToYUV(const fixed_y_t* const best_y, + const fixed_t* const best_uv, + WebPPicture* const picture) { + int i, j; + const int w = (picture->width + 1) & ~1; + const int h = (picture->height + 1) & ~1; + const int uv_w = w >> 1; + const int uv_h = h >> 1; + for (j = 0; j < picture->height; ++j) { + for (i = 0; i < picture->width; ++i) { + const int off = 3 * ((i >> 1) + (j >> 1) * uv_w); + const int off2 = i + j * picture->y_stride; + const int W = best_y[i + j * w]; + const int r = best_uv[off + 0] + W; + const int g = best_uv[off + 1] + W; + const int b = best_uv[off + 2] + W; + picture->y[off2] = ConvertRGBToY(r, g, b); + } + } + for (j = 0; j < uv_h; ++j) { + uint8_t* const dst_u = picture->u + j * picture->uv_stride; + uint8_t* const dst_v = picture->v + j * picture->uv_stride; + for (i = 0; i < uv_w; ++i) { + const int off = 3 * (i + j * uv_w); + const int r = best_uv[off + 0]; + const int g = best_uv[off + 1]; + const int b = best_uv[off + 2]; + dst_u[i] = ConvertRGBToU(r, g, b); + dst_v[i] = ConvertRGBToV(r, g, b); + } + } + return 1; +} + +//------------------------------------------------------------------------------ +// Main function + +#define SAFE_ALLOC(W, H, T) ((T*)WebPSafeMalloc((W) * (H), sizeof(T))) + +static int PreprocessARGB(const uint8_t* const r_ptr, + const uint8_t* const g_ptr, + const uint8_t* const b_ptr, + int step, int rgb_stride, + WebPPicture* const picture) { + // we expand the right/bottom border if needed + const int w = (picture->width + 1) & ~1; + const int h = (picture->height + 1) & ~1; + const int uv_w = w >> 1; + const int uv_h = h >> 1; + int i, j, iter; + + // TODO(skal): allocate one big memory chunk. But for now, it's easier + // for valgrind debugging to have several chunks. + fixed_y_t* const tmp_buffer = SAFE_ALLOC(w * 3, 2, fixed_y_t); // scratch + fixed_y_t* const best_y = SAFE_ALLOC(w, h, fixed_y_t); + fixed_y_t* const target_y = SAFE_ALLOC(w, h, fixed_y_t); + fixed_y_t* const best_rgb_y = SAFE_ALLOC(w, 2, fixed_y_t); + fixed_t* const best_uv = SAFE_ALLOC(uv_w * 3, uv_h, fixed_t); + fixed_t* const target_uv = SAFE_ALLOC(uv_w * 3, uv_h, fixed_t); + fixed_t* const best_rgb_uv = SAFE_ALLOC(uv_w * 3, 1, fixed_t); + int ok; + int diff_sum = 0; + const int first_diff_threshold = (int)(2.5 * w * h); + const int min_improvement = 5; // stop if improvement is below this % + const int min_first_improvement = 80; + + if (best_y == NULL || best_uv == NULL || + target_y == NULL || target_uv == NULL || + best_rgb_y == NULL || best_rgb_uv == NULL || + tmp_buffer == NULL) { + ok = WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); + goto End; + } + assert(picture->width >= kMinDimensionIterativeConversion); + assert(picture->height >= kMinDimensionIterativeConversion); + + // Import RGB samples to W/RGB representation. + for (j = 0; j < picture->height; j += 2) { + const int is_last_row = (j == picture->height - 1); + fixed_y_t* const src1 = tmp_buffer; + fixed_y_t* const src2 = tmp_buffer + 3 * w; + const int off1 = j * rgb_stride; + const int off2 = off1 + rgb_stride; + const int uv_off = (j >> 1) * 3 * uv_w; + fixed_y_t* const dst_y = best_y + j * w; + + // prepare two rows of input + ImportOneRow(r_ptr + off1, g_ptr + off1, b_ptr + off1, + step, picture->width, src1); + if (!is_last_row) { + ImportOneRow(r_ptr + off2, g_ptr + off2, b_ptr + off2, + step, picture->width, src2); + } else { + memcpy(src2, src1, 3 * w * sizeof(*src2)); + } + UpdateW(src1, target_y + (j + 0) * w, w); + UpdateW(src2, target_y + (j + 1) * w, w); + diff_sum += UpdateChroma(src1, src2, target_uv + uv_off, dst_y, uv_w); + memcpy(best_uv + uv_off, target_uv + uv_off, 3 * uv_w * sizeof(*best_uv)); + memcpy(dst_y + w, dst_y, w * sizeof(*dst_y)); + } + + // Iterate and resolve clipping conflicts. + for (iter = 0; iter < kNumIterations; ++iter) { + int k; + const fixed_t* cur_uv = best_uv; + const fixed_t* prev_uv = best_uv; + const int old_diff_sum = diff_sum; + diff_sum = 0; + for (j = 0; j < h; j += 2) { + fixed_y_t* const src1 = tmp_buffer; + fixed_y_t* const src2 = tmp_buffer + 3 * w; + { + const fixed_t* const next_uv = cur_uv + ((j < h - 2) ? 3 * uv_w : 0); + InterpolateTwoRows(best_y + j * w, prev_uv, cur_uv, next_uv, + w, src1, src2); + prev_uv = cur_uv; + cur_uv = next_uv; + } + + UpdateW(src1, best_rgb_y + 0 * w, w); + UpdateW(src2, best_rgb_y + 1 * w, w); + diff_sum += UpdateChroma(src1, src2, best_rgb_uv, NULL, uv_w); + + // update two rows of Y and one row of RGB + for (i = 0; i < 2 * w; ++i) { + const int off = i + j * w; + const int diff_y = target_y[off] - best_rgb_y[i]; + const int new_y = (int)best_y[off] + diff_y; + best_y[off] = clip_y(new_y); + } + for (i = 0; i < uv_w; ++i) { + const int off = 3 * (i + (j >> 1) * uv_w); + int W; + for (k = 0; k <= 2; ++k) { + const int diff_uv = (int)target_uv[off + k] - best_rgb_uv[3 * i + k]; + best_uv[off + k] += diff_uv; + } + W = RGBToGray(best_uv[off + 0], best_uv[off + 1], best_uv[off + 2]); + for (k = 0; k <= 2; ++k) { + best_uv[off + k] -= W; + } + } + } + // test exit condition + if (diff_sum > 0) { + const int improvement = 100 * abs(diff_sum - old_diff_sum) / diff_sum; + // Check if first iteration gave good result already, without a large + // jump of improvement (otherwise it means we need to try few extra + // iterations, just to be sure). + if (iter == 0 && diff_sum < first_diff_threshold && + improvement < min_first_improvement) { + break; + } + // then, check if improvement is stalling. + if (improvement < min_improvement) { + break; + } + } else { + break; + } + } + + // final reconstruction + ok = ConvertWRGBToYUV(best_y, best_uv, picture); + + End: + WebPSafeFree(best_y); + WebPSafeFree(best_uv); + WebPSafeFree(target_y); + WebPSafeFree(target_uv); + WebPSafeFree(best_rgb_y); + WebPSafeFree(best_rgb_uv); + WebPSafeFree(tmp_buffer); + return ok; +} +#undef SAFE_ALLOC + +//------------------------------------------------------------------------------ +// "Fast" regular RGB->YUV + +#define SUM4(ptr, step) LinearToGamma( \ + GammaToLinear((ptr)[0]) + \ + GammaToLinear((ptr)[(step)]) + \ + GammaToLinear((ptr)[rgb_stride]) + \ + GammaToLinear((ptr)[rgb_stride + (step)]), 0) \ + +#define SUM2(ptr) \ + LinearToGamma(GammaToLinear((ptr)[0]) + GammaToLinear((ptr)[rgb_stride]), 1) + +#define SUM2ALPHA(ptr) ((ptr)[0] + (ptr)[rgb_stride]) +#define SUM4ALPHA(ptr) (SUM2ALPHA(ptr) + SUM2ALPHA((ptr) + 4)) + +#if defined(USE_INVERSE_ALPHA_TABLE) + +static const int kAlphaFix = 19; +// Following table is (1 << kAlphaFix) / a. The (v * kInvAlpha[a]) >> kAlphaFix +// formula is then equal to v / a in most (99.6%) cases. Note that this table +// and constant are adjusted very tightly to fit 32b arithmetic. +// In particular, they use the fact that the operands for 'v / a' are actually +// derived as v = (a0.p0 + a1.p1 + a2.p2 + a3.p3) and a = a0 + a1 + a2 + a3 +// with ai in [0..255] and pi in [0..1<<kGammaFix). The constraint to avoid +// overflow is: kGammaFix + kAlphaFix <= 31. +static const uint32_t kInvAlpha[4 * 0xff + 1] = { + 0, /* alpha = 0 */ + 524288, 262144, 174762, 131072, 104857, 87381, 74898, 65536, + 58254, 52428, 47662, 43690, 40329, 37449, 34952, 32768, + 30840, 29127, 27594, 26214, 24966, 23831, 22795, 21845, + 20971, 20164, 19418, 18724, 18078, 17476, 16912, 16384, + 15887, 15420, 14979, 14563, 14169, 13797, 13443, 13107, + 12787, 12483, 12192, 11915, 11650, 11397, 11155, 10922, + 10699, 10485, 10280, 10082, 9892, 9709, 9532, 9362, + 9198, 9039, 8886, 8738, 8594, 8456, 8322, 8192, + 8065, 7943, 7825, 7710, 7598, 7489, 7384, 7281, + 7182, 7084, 6990, 6898, 6808, 6721, 6636, 6553, + 6472, 6393, 6316, 6241, 6168, 6096, 6026, 5957, + 5890, 5825, 5761, 5698, 5637, 5577, 5518, 5461, + 5405, 5349, 5295, 5242, 5190, 5140, 5090, 5041, + 4993, 4946, 4899, 4854, 4809, 4766, 4723, 4681, + 4639, 4599, 4559, 4519, 4481, 4443, 4405, 4369, + 4332, 4297, 4262, 4228, 4194, 4161, 4128, 4096, + 4064, 4032, 4002, 3971, 3942, 3912, 3883, 3855, + 3826, 3799, 3771, 3744, 3718, 3692, 3666, 3640, + 3615, 3591, 3566, 3542, 3518, 3495, 3472, 3449, + 3426, 3404, 3382, 3360, 3339, 3318, 3297, 3276, + 3256, 3236, 3216, 3196, 3177, 3158, 3139, 3120, + 3102, 3084, 3066, 3048, 3030, 3013, 2995, 2978, + 2962, 2945, 2928, 2912, 2896, 2880, 2864, 2849, + 2833, 2818, 2803, 2788, 2774, 2759, 2744, 2730, + 2716, 2702, 2688, 2674, 2661, 2647, 2634, 2621, + 2608, 2595, 2582, 2570, 2557, 2545, 2532, 2520, + 2508, 2496, 2484, 2473, 2461, 2449, 2438, 2427, + 2416, 2404, 2394, 2383, 2372, 2361, 2351, 2340, + 2330, 2319, 2309, 2299, 2289, 2279, 2269, 2259, + 2250, 2240, 2231, 2221, 2212, 2202, 2193, 2184, + 2175, 2166, 2157, 2148, 2139, 2131, 2122, 2114, + 2105, 2097, 2088, 2080, 2072, 2064, 2056, 2048, + 2040, 2032, 2024, 2016, 2008, 2001, 1993, 1985, + 1978, 1971, 1963, 1956, 1949, 1941, 1934, 1927, + 1920, 1913, 1906, 1899, 1892, 1885, 1879, 1872, + 1865, 1859, 1852, 1846, 1839, 1833, 1826, 1820, + 1814, 1807, 1801, 1795, 1789, 1783, 1777, 1771, + 1765, 1759, 1753, 1747, 1741, 1736, 1730, 1724, + 1718, 1713, 1707, 1702, 1696, 1691, 1685, 1680, + 1675, 1669, 1664, 1659, 1653, 1648, 1643, 1638, + 1633, 1628, 1623, 1618, 1613, 1608, 1603, 1598, + 1593, 1588, 1583, 1579, 1574, 1569, 1565, 1560, + 1555, 1551, 1546, 1542, 1537, 1533, 1528, 1524, + 1519, 1515, 1510, 1506, 1502, 1497, 1493, 1489, + 1485, 1481, 1476, 1472, 1468, 1464, 1460, 1456, + 1452, 1448, 1444, 1440, 1436, 1432, 1428, 1424, + 1420, 1416, 1413, 1409, 1405, 1401, 1398, 1394, + 1390, 1387, 1383, 1379, 1376, 1372, 1368, 1365, + 1361, 1358, 1354, 1351, 1347, 1344, 1340, 1337, + 1334, 1330, 1327, 1323, 1320, 1317, 1314, 1310, + 1307, 1304, 1300, 1297, 1294, 1291, 1288, 1285, + 1281, 1278, 1275, 1272, 1269, 1266, 1263, 1260, + 1257, 1254, 1251, 1248, 1245, 1242, 1239, 1236, + 1233, 1230, 1227, 1224, 1222, 1219, 1216, 1213, + 1210, 1208, 1205, 1202, 1199, 1197, 1194, 1191, + 1188, 1186, 1183, 1180, 1178, 1175, 1172, 1170, + 1167, 1165, 1162, 1159, 1157, 1154, 1152, 1149, + 1147, 1144, 1142, 1139, 1137, 1134, 1132, 1129, + 1127, 1125, 1122, 1120, 1117, 1115, 1113, 1110, + 1108, 1106, 1103, 1101, 1099, 1096, 1094, 1092, + 1089, 1087, 1085, 1083, 1081, 1078, 1076, 1074, + 1072, 1069, 1067, 1065, 1063, 1061, 1059, 1057, + 1054, 1052, 1050, 1048, 1046, 1044, 1042, 1040, + 1038, 1036, 1034, 1032, 1030, 1028, 1026, 1024, + 1022, 1020, 1018, 1016, 1014, 1012, 1010, 1008, + 1006, 1004, 1002, 1000, 998, 996, 994, 992, + 991, 989, 987, 985, 983, 981, 979, 978, + 976, 974, 972, 970, 969, 967, 965, 963, + 961, 960, 958, 956, 954, 953, 951, 949, + 948, 946, 944, 942, 941, 939, 937, 936, + 934, 932, 931, 929, 927, 926, 924, 923, + 921, 919, 918, 916, 914, 913, 911, 910, + 908, 907, 905, 903, 902, 900, 899, 897, + 896, 894, 893, 891, 890, 888, 887, 885, + 884, 882, 881, 879, 878, 876, 875, 873, + 872, 870, 869, 868, 866, 865, 863, 862, + 860, 859, 858, 856, 855, 853, 852, 851, + 849, 848, 846, 845, 844, 842, 841, 840, + 838, 837, 836, 834, 833, 832, 830, 829, + 828, 826, 825, 824, 823, 821, 820, 819, + 817, 816, 815, 814, 812, 811, 810, 809, + 807, 806, 805, 804, 802, 801, 800, 799, + 798, 796, 795, 794, 793, 791, 790, 789, + 788, 787, 786, 784, 783, 782, 781, 780, + 779, 777, 776, 775, 774, 773, 772, 771, + 769, 768, 767, 766, 765, 764, 763, 762, + 760, 759, 758, 757, 756, 755, 754, 753, + 752, 751, 750, 748, 747, 746, 745, 744, + 743, 742, 741, 740, 739, 738, 737, 736, + 735, 734, 733, 732, 731, 730, 729, 728, + 727, 726, 725, 724, 723, 722, 721, 720, + 719, 718, 717, 716, 715, 714, 713, 712, + 711, 710, 709, 708, 707, 706, 705, 704, + 703, 702, 701, 700, 699, 699, 698, 697, + 696, 695, 694, 693, 692, 691, 690, 689, + 688, 688, 687, 686, 685, 684, 683, 682, + 681, 680, 680, 679, 678, 677, 676, 675, + 674, 673, 673, 672, 671, 670, 669, 668, + 667, 667, 666, 665, 664, 663, 662, 661, + 661, 660, 659, 658, 657, 657, 656, 655, + 654, 653, 652, 652, 651, 650, 649, 648, + 648, 647, 646, 645, 644, 644, 643, 642, + 641, 640, 640, 639, 638, 637, 637, 636, + 635, 634, 633, 633, 632, 631, 630, 630, + 629, 628, 627, 627, 626, 625, 624, 624, + 623, 622, 621, 621, 620, 619, 618, 618, + 617, 616, 616, 615, 614, 613, 613, 612, + 611, 611, 610, 609, 608, 608, 607, 606, + 606, 605, 604, 604, 603, 602, 601, 601, + 600, 599, 599, 598, 597, 597, 596, 595, + 595, 594, 593, 593, 592, 591, 591, 590, + 589, 589, 588, 587, 587, 586, 585, 585, + 584, 583, 583, 582, 581, 581, 580, 579, + 579, 578, 578, 577, 576, 576, 575, 574, + 574, 573, 572, 572, 571, 571, 570, 569, + 569, 568, 568, 567, 566, 566, 565, 564, + 564, 563, 563, 562, 561, 561, 560, 560, + 559, 558, 558, 557, 557, 556, 555, 555, + 554, 554, 553, 553, 552, 551, 551, 550, + 550, 549, 548, 548, 547, 547, 546, 546, + 545, 544, 544, 543, 543, 542, 542, 541, + 541, 540, 539, 539, 538, 538, 537, 537, + 536, 536, 535, 534, 534, 533, 533, 532, + 532, 531, 531, 530, 530, 529, 529, 528, + 527, 527, 526, 526, 525, 525, 524, 524, + 523, 523, 522, 522, 521, 521, 520, 520, + 519, 519, 518, 518, 517, 517, 516, 516, + 515, 515, 514, 514 +}; + +// Note that LinearToGamma() expects the values to be premultiplied by 4, +// so we incorporate this factor 4 inside the DIVIDE_BY_ALPHA macro directly. +#define DIVIDE_BY_ALPHA(sum, a) (((sum) * kInvAlpha[(a)]) >> (kAlphaFix - 2)) + +#else + +#define DIVIDE_BY_ALPHA(sum, a) (4 * (sum) / (a)) + +#endif // USE_INVERSE_ALPHA_TABLE + +static WEBP_INLINE int LinearToGammaWeighted(const uint8_t* src, + const uint8_t* a_ptr, + uint32_t total_a, int step, + int rgb_stride) { + const uint32_t sum = + a_ptr[0] * GammaToLinear(src[0]) + + a_ptr[step] * GammaToLinear(src[step]) + + a_ptr[rgb_stride] * GammaToLinear(src[rgb_stride]) + + a_ptr[rgb_stride + step] * GammaToLinear(src[rgb_stride + step]); + assert(total_a > 0 && total_a <= 4 * 0xff); +#if defined(USE_INVERSE_ALPHA_TABLE) + assert((uint64_t)sum * kInvAlpha[total_a] < ((uint64_t)1 << 32)); +#endif + return LinearToGamma(DIVIDE_BY_ALPHA(sum, total_a), 0); +} + +static WEBP_INLINE void ConvertRowToY(const uint8_t* const r_ptr, + const uint8_t* const g_ptr, + const uint8_t* const b_ptr, + int step, + uint8_t* const dst_y, + int width, + VP8Random* const rg) { + int i, j; + for (i = 0, j = 0; i < width; i += 1, j += step) { + dst_y[i] = RGBToY(r_ptr[j], g_ptr[j], b_ptr[j], rg); + } +} + +static WEBP_INLINE void AccumulateRGBA(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 rgb_stride, + uint16_t* dst, int width) { + int i, j; + // we loop over 2x2 blocks and produce one R/G/B/A value for each. + for (i = 0, j = 0; i < (width >> 1); i += 1, j += 2 * 4, dst += 4) { + const uint32_t a = SUM4ALPHA(a_ptr + j); + int r, g, b; + if (a == 4 * 0xff || a == 0) { + r = SUM4(r_ptr + j, 4); + g = SUM4(g_ptr + j, 4); + b = SUM4(b_ptr + j, 4); + } else { + r = LinearToGammaWeighted(r_ptr + j, a_ptr + j, a, 4, rgb_stride); + g = LinearToGammaWeighted(g_ptr + j, a_ptr + j, a, 4, rgb_stride); + b = LinearToGammaWeighted(b_ptr + j, a_ptr + j, a, 4, rgb_stride); + } + dst[0] = r; + dst[1] = g; + dst[2] = b; + dst[3] = a; + } + if (width & 1) { + const uint32_t a = 2u * SUM2ALPHA(a_ptr + j); + int r, g, b; + if (a == 4 * 0xff || a == 0) { + r = SUM2(r_ptr + j); + g = SUM2(g_ptr + j); + b = SUM2(b_ptr + j); + } else { + r = LinearToGammaWeighted(r_ptr + j, a_ptr + j, a, 0, rgb_stride); + g = LinearToGammaWeighted(g_ptr + j, a_ptr + j, a, 0, rgb_stride); + b = LinearToGammaWeighted(b_ptr + j, a_ptr + j, a, 0, rgb_stride); + } + dst[0] = r; + dst[1] = g; + dst[2] = b; + dst[3] = a; + } +} + +static WEBP_INLINE void AccumulateRGB(const uint8_t* const r_ptr, + const uint8_t* const g_ptr, + const uint8_t* const b_ptr, + int step, int rgb_stride, + uint16_t* dst, int width) { + int i, j; + for (i = 0, j = 0; i < (width >> 1); i += 1, j += 2 * step, dst += 4) { + dst[0] = SUM4(r_ptr + j, step); + dst[1] = SUM4(g_ptr + j, step); + dst[2] = SUM4(b_ptr + j, step); + } + if (width & 1) { + dst[0] = SUM2(r_ptr + j); + dst[1] = SUM2(g_ptr + j); + dst[2] = SUM2(b_ptr + j); + } +} + +static WEBP_INLINE void ConvertRowsToUV(const uint16_t* rgb, + uint8_t* const dst_u, + uint8_t* const dst_v, + int width, + VP8Random* const rg) { + int i; + for (i = 0; i < width; i += 1, rgb += 4) { + const int r = rgb[0], g = rgb[1], b = rgb[2]; + dst_u[i] = RGBToU(r, g, b, rg); + dst_v[i] = RGBToV(r, g, b, rg); + } +} + +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 + float dithering, + int use_iterative_conversion, + WebPPicture* const picture) { + int y; + const int width = picture->width; + const int height = picture->height; + const int has_alpha = CheckNonOpaque(a_ptr, width, height, step, rgb_stride); + const int is_rgb = (r_ptr < b_ptr); // otherwise it's bgr + + picture->colorspace = has_alpha ? WEBP_YUV420A : WEBP_YUV420; + picture->use_argb = 0; + + // disable smart conversion if source is too small (overkill). + if (width < kMinDimensionIterativeConversion || + height < kMinDimensionIterativeConversion) { + use_iterative_conversion = 0; + } + + if (!WebPPictureAllocYUVA(picture, width, height)) { + return 0; + } + if (has_alpha) { + WebPInitAlphaProcessing(); + assert(step == 4); +#if defined(USE_GAMMA_COMPRESSION) && defined(USE_INVERSE_ALPHA_TABLE) + assert(kAlphaFix + kGammaFix <= 31); +#endif + } + + if (use_iterative_conversion) { + InitGammaTablesF(); + if (!PreprocessARGB(r_ptr, g_ptr, b_ptr, step, rgb_stride, picture)) { + return 0; + } + if (has_alpha) { + WebPExtractAlpha(a_ptr, rgb_stride, width, height, + picture->a, picture->a_stride); + } + } else { + const int uv_width = (width + 1) >> 1; + int use_dsp = (step == 3); // use special function in this case + // temporary storage for accumulated R/G/B values during conversion to U/V + uint16_t* const tmp_rgb = + (uint16_t*)WebPSafeMalloc(4 * uv_width, sizeof(*tmp_rgb)); + uint8_t* dst_y = picture->y; + uint8_t* dst_u = picture->u; + uint8_t* dst_v = picture->v; + uint8_t* dst_a = picture->a; + + VP8Random base_rg; + VP8Random* rg = NULL; + if (dithering > 0.) { + VP8InitRandom(&base_rg, dithering); + rg = &base_rg; + use_dsp = 0; // can't use dsp in this case + } + WebPInitConvertARGBToYUV(); + InitGammaTables(); + + if (tmp_rgb == NULL) return 0; // malloc error + + // Downsample Y/U/V planes, two rows at a time + for (y = 0; y < (height >> 1); ++y) { + int rows_have_alpha = has_alpha; + const int off1 = (2 * y + 0) * rgb_stride; + const int off2 = (2 * y + 1) * rgb_stride; + if (use_dsp) { + if (is_rgb) { + WebPConvertRGB24ToY(r_ptr + off1, dst_y, width); + WebPConvertRGB24ToY(r_ptr + off2, dst_y + picture->y_stride, width); + } else { + WebPConvertBGR24ToY(b_ptr + off1, dst_y, width); + WebPConvertBGR24ToY(b_ptr + off2, dst_y + picture->y_stride, width); + } + } else { + ConvertRowToY(r_ptr + off1, g_ptr + off1, b_ptr + off1, step, + dst_y, width, rg); + ConvertRowToY(r_ptr + off2, g_ptr + off2, b_ptr + off2, step, + dst_y + picture->y_stride, width, rg); + } + dst_y += 2 * picture->y_stride; + if (has_alpha) { + rows_have_alpha &= !WebPExtractAlpha(a_ptr + off1, rgb_stride, + width, 2, + dst_a, picture->a_stride); + dst_a += 2 * picture->a_stride; + } + // Collect averaged R/G/B(/A) + if (!rows_have_alpha) { + AccumulateRGB(r_ptr + off1, g_ptr + off1, b_ptr + off1, + step, rgb_stride, tmp_rgb, width); + } else { + AccumulateRGBA(r_ptr + off1, g_ptr + off1, b_ptr + off1, a_ptr + off1, + rgb_stride, tmp_rgb, width); + } + // Convert to U/V + if (rg == NULL) { + WebPConvertRGBA32ToUV(tmp_rgb, dst_u, dst_v, uv_width); + } else { + ConvertRowsToUV(tmp_rgb, dst_u, dst_v, uv_width, rg); + } + dst_u += picture->uv_stride; + dst_v += picture->uv_stride; + } + if (height & 1) { // extra last row + const int off = 2 * y * rgb_stride; + int row_has_alpha = has_alpha; + if (use_dsp) { + if (r_ptr < b_ptr) { + WebPConvertRGB24ToY(r_ptr + off, dst_y, width); + } else { + WebPConvertBGR24ToY(b_ptr + off, dst_y, width); + } + } else { + ConvertRowToY(r_ptr + off, g_ptr + off, b_ptr + off, step, + dst_y, width, rg); + } + if (row_has_alpha) { + row_has_alpha &= !WebPExtractAlpha(a_ptr + off, 0, width, 1, dst_a, 0); + } + // Collect averaged R/G/B(/A) + if (!row_has_alpha) { + // Collect averaged R/G/B + AccumulateRGB(r_ptr + off, g_ptr + off, b_ptr + off, + step, /* rgb_stride = */ 0, tmp_rgb, width); + } else { + AccumulateRGBA(r_ptr + off, g_ptr + off, b_ptr + off, a_ptr + off, + /* rgb_stride = */ 0, tmp_rgb, width); + } + if (rg == NULL) { + WebPConvertRGBA32ToUV(tmp_rgb, dst_u, dst_v, uv_width); + } else { + ConvertRowsToUV(tmp_rgb, dst_u, dst_v, uv_width, rg); + } + } + WebPSafeFree(tmp_rgb); + } + return 1; +} + +#undef SUM4 +#undef SUM2 +#undef SUM4ALPHA +#undef SUM2ALPHA + +//------------------------------------------------------------------------------ +// call for ARGB->YUVA conversion + +static int PictureARGBToYUVA(WebPPicture* picture, WebPEncCSP colorspace, + float dithering, int use_iterative_conversion) { + if (picture == NULL) return 0; + if (picture->argb == NULL) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); + } else if ((colorspace & WEBP_CSP_UV_MASK) != WEBP_YUV420) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); + } 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; + + picture->colorspace = WEBP_YUV420; + return ImportYUVAFromRGBA(r, g, b, a, 4, 4 * picture->argb_stride, + dithering, use_iterative_conversion, picture); + } +} + +int WebPPictureARGBToYUVADithered(WebPPicture* picture, WebPEncCSP colorspace, + float dithering) { + return PictureARGBToYUVA(picture, colorspace, dithering, 0); +} + +int WebPPictureARGBToYUVA(WebPPicture* picture, WebPEncCSP colorspace) { + return PictureARGBToYUVA(picture, colorspace, 0.f, 0); +} + +int WebPPictureSmartARGBToYUVA(WebPPicture* picture) { + return PictureARGBToYUVA(picture, WEBP_YUV420, 0.f, 1); +} + +//------------------------------------------------------------------------------ +// call for YUVA -> ARGB conversion + +int WebPPictureYUVAToARGB(WebPPicture* picture) { + if (picture == NULL) return 0; + if (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 (!WebPPictureAllocARGB(picture, picture->width, picture->height)) return 0; + picture->use_argb = 1; + + // 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(cur_y, NULL, cur_u, cur_v, cur_u, cur_v, dst, NULL, 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 argb_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) { + argb_dst[x] = (argb_dst[x] & 0x00ffffffu) | ((uint32_t)src[x] << 24); + } + } + } + } + return 1; +} + +//------------------------------------------------------------------------------ +// automatic import / conversion + +static int Import(WebPPicture* const picture, + const uint8_t* const rgb, int rgb_stride, + int step, int swap_rb, int import_alpha) { + int y; + 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, + 0.f /* no dithering */, 0, picture); + } + if (!WebPPictureAlloc(picture)) return 0; + + VP8EncDspARGBInit(); + + if (import_alpha) { + assert(step == 4); + for (y = 0; y < height; ++y) { + uint32_t* const dst = &picture->argb[y * picture->argb_stride]; + const int offset = y * rgb_stride; + VP8PackARGB(a_ptr + offset, r_ptr + offset, g_ptr + offset, + b_ptr + offset, width, dst); + } + } else { + assert(step >= 3); + for (y = 0; y < height; ++y) { + uint32_t* const dst = &picture->argb[y * picture->argb_stride]; + const int offset = y * rgb_stride; + VP8PackRGB(r_ptr + offset, g_ptr + offset, b_ptr + offset, + width, step, dst); + } + } + return 1; +} + +// Public API + +int WebPPictureImportRGB(WebPPicture* picture, + const uint8_t* rgb, int rgb_stride) { + return (picture != NULL && rgb != NULL) + ? Import(picture, rgb, rgb_stride, 3, 0, 0) + : 0; +} + +int WebPPictureImportBGR(WebPPicture* picture, + const uint8_t* rgb, int rgb_stride) { + return (picture != NULL && rgb != NULL) + ? Import(picture, rgb, rgb_stride, 3, 1, 0) + : 0; +} + +int WebPPictureImportRGBA(WebPPicture* picture, + const uint8_t* rgba, int rgba_stride) { + return (picture != NULL && rgba != NULL) + ? Import(picture, rgba, rgba_stride, 4, 0, 1) + : 0; +} + +int WebPPictureImportBGRA(WebPPicture* picture, + const uint8_t* rgba, int rgba_stride) { + return (picture != NULL && rgba != NULL) + ? Import(picture, rgba, rgba_stride, 4, 1, 1) + : 0; +} + +int WebPPictureImportRGBX(WebPPicture* picture, + const uint8_t* rgba, int rgba_stride) { + return (picture != NULL && rgba != NULL) + ? Import(picture, rgba, rgba_stride, 4, 0, 0) + : 0; +} + +int WebPPictureImportBGRX(WebPPicture* picture, + const uint8_t* rgba, int rgba_stride) { + return (picture != NULL && rgba != NULL) + ? Import(picture, rgba, rgba_stride, 4, 1, 0) + : 0; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/enc/picture_psnr.c b/thirdparty/libwebp/enc/picture_psnr.c new file mode 100644 index 0000000000..81ab1b5ca1 --- /dev/null +++ b/thirdparty/libwebp/enc/picture_psnr.c @@ -0,0 +1,177 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 tools for measuring distortion +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <math.h> +#include <stdlib.h> + +#include "./vp8enci.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// local-min distortion +// +// For every pixel in the *reference* picture, we search for the local best +// match in the compressed image. This is not a symmetrical measure. + +#define RADIUS 2 // search radius. Shouldn't be too large. + +static void AccumulateLSIM(const uint8_t* src, int src_stride, + const uint8_t* ref, int ref_stride, + int w, int h, VP8DistoStats* stats) { + int x, y; + double total_sse = 0.; + for (y = 0; y < h; ++y) { + const int y_0 = (y - RADIUS < 0) ? 0 : y - RADIUS; + const int y_1 = (y + RADIUS + 1 >= h) ? h : y + RADIUS + 1; + for (x = 0; x < w; ++x) { + const int x_0 = (x - RADIUS < 0) ? 0 : x - RADIUS; + const int x_1 = (x + RADIUS + 1 >= w) ? w : x + RADIUS + 1; + double best_sse = 255. * 255.; + const double value = (double)ref[y * ref_stride + x]; + int i, j; + for (j = y_0; j < y_1; ++j) { + const uint8_t* const s = src + j * src_stride; + for (i = x_0; i < x_1; ++i) { + const double diff = s[i] - value; + const double sse = diff * diff; + if (sse < best_sse) best_sse = sse; + } + } + total_sse += best_sse; + } + } + stats->w = w * h; + stats->xm = 0; + stats->ym = 0; + stats->xxm = total_sse; + stats->yym = 0; + stats->xxm = 0; +} +#undef RADIUS + +//------------------------------------------------------------------------------ +// Distortion + +// Max value returned in case of exact similarity. +static const double kMinDistortion_dB = 99.; +static float GetPSNR(const double v) { + return (float)((v > 0.) ? -4.3429448 * log(v / (255 * 255.)) + : kMinDistortion_dB); +} + +int WebPPictureDistortion(const WebPPicture* src, const WebPPicture* ref, + int type, float result[5]) { + VP8DistoStats stats[5]; + int w, h; + + memset(stats, 0, sizeof(stats)); + + VP8SSIMDspInit(); + + if (src == NULL || ref == NULL || + src->width != ref->width || src->height != ref->height || + src->use_argb != ref->use_argb || result == NULL) { + return 0; + } + w = src->width; + h = src->height; + + if (src->use_argb == 1) { + if (src->argb == NULL || ref->argb == NULL) { + return 0; + } else { + int i, j, c; + uint8_t* tmp1, *tmp2; + uint8_t* const tmp_plane = + (uint8_t*)WebPSafeMalloc(2ULL * w * h, sizeof(*tmp_plane)); + if (tmp_plane == NULL) return 0; + tmp1 = tmp_plane; + tmp2 = tmp_plane + w * h; + for (c = 0; c < 4; ++c) { + for (j = 0; j < h; ++j) { + for (i = 0; i < w; ++i) { + tmp1[j * w + i] = src->argb[i + j * src->argb_stride] >> (c * 8); + tmp2[j * w + i] = ref->argb[i + j * ref->argb_stride] >> (c * 8); + } + } + if (type >= 2) { + AccumulateLSIM(tmp1, w, tmp2, w, w, h, &stats[c]); + } else { + VP8SSIMAccumulatePlane(tmp1, w, tmp2, w, w, h, &stats[c]); + } + } + free(tmp_plane); + } + } else { + int has_alpha, uv_w, uv_h; + if (src->y == NULL || ref->y == NULL || + src->u == NULL || ref->u == NULL || + src->v == NULL || ref->v == NULL) { + return 0; + } + has_alpha = !!(src->colorspace & WEBP_CSP_ALPHA_BIT); + if (has_alpha != !!(ref->colorspace & WEBP_CSP_ALPHA_BIT) || + (has_alpha && (src->a == NULL || ref->a == NULL))) { + return 0; + } + + uv_w = (src->width + 1) >> 1; + uv_h = (src->height + 1) >> 1; + if (type >= 2) { + AccumulateLSIM(src->y, src->y_stride, ref->y, ref->y_stride, + w, h, &stats[0]); + AccumulateLSIM(src->u, src->uv_stride, ref->u, ref->uv_stride, + uv_w, uv_h, &stats[1]); + AccumulateLSIM(src->v, src->uv_stride, ref->v, ref->uv_stride, + uv_w, uv_h, &stats[2]); + if (has_alpha) { + AccumulateLSIM(src->a, src->a_stride, ref->a, ref->a_stride, + w, h, &stats[3]); + } + } else { + VP8SSIMAccumulatePlane(src->y, src->y_stride, + ref->y, ref->y_stride, + w, h, &stats[0]); + VP8SSIMAccumulatePlane(src->u, src->uv_stride, + ref->u, ref->uv_stride, + uv_w, uv_h, &stats[1]); + VP8SSIMAccumulatePlane(src->v, src->uv_stride, + ref->v, ref->uv_stride, + uv_w, uv_h, &stats[2]); + if (has_alpha) { + VP8SSIMAccumulatePlane(src->a, src->a_stride, + ref->a, ref->a_stride, + w, h, &stats[3]); + } + } + } + // Final stat calculations. + { + int c; + 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] = GetPSNR(v); + } + // Accumulate forward + if (c < 4) VP8SSIMAddStats(&stats[c], &stats[4]); + } + } + return 1; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/enc/picture_rescale.c b/thirdparty/libwebp/enc/picture_rescale.c new file mode 100644 index 0000000000..9f19e8e80f --- /dev/null +++ b/thirdparty/libwebp/enc/picture_rescale.c @@ -0,0 +1,264 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 tools: copy, crop, rescaling and view. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> + +#include "./vp8enci.h" +#include "../utils/rescaler.h" +#include "../utils/utils.h" + +#define HALVE(x) (((x) + 1) >> 1) + +// Grab the 'specs' (writer, *opaque, width, height...) from 'src' and copy them +// into 'dst'. Mark 'dst' as not owning any memory. +static void PictureGrabSpecs(const WebPPicture* const src, + WebPPicture* const dst) { + assert(src != NULL && dst != NULL); + *dst = *src; + WebPPictureResetBuffers(dst); +} + +//------------------------------------------------------------------------------ + +// 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) { + *left &= ~1; + *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; + + PictureGrabSpecs(src, dst); + if (!WebPPictureAlloc(dst)) return 0; + + if (!src->use_argb) { + WebPCopyPlane(src->y, src->y_stride, + dst->y, dst->y_stride, dst->width, dst->height); + WebPCopyPlane(src->u, src->uv_stride, dst->u, dst->uv_stride, + HALVE(dst->width), HALVE(dst->height)); + WebPCopyPlane(src->v, src->uv_stride, dst->v, dst->uv_stride, + HALVE(dst->width), HALVE(dst->height)); + if (dst->a != NULL) { + WebPCopyPlane(src->a, src->a_stride, + dst->a, dst->a_stride, dst->width, dst->height); + } + } else { + WebPCopyPlane((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_'. + PictureGrabSpecs(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); + dst->y_stride = src->y_stride; + dst->uv_stride = src->uv_stride; + if (src->a != NULL) { + dst->a = src->a + top * src->a_stride + left; + dst->a_stride = src->a_stride; + } + } else { + dst->argb = src->argb + top * src->argb_stride + left; + dst->argb_stride = src->argb_stride; + } + 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; + + PictureGrabSpecs(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; + WebPCopyPlane(pic->y + y_offset, pic->y_stride, + tmp.y, tmp.y_stride, width, height); + WebPCopyPlane(pic->u + uv_offset, pic->uv_stride, + tmp.u, tmp.uv_stride, HALVE(width), HALVE(height)); + WebPCopyPlane(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; + WebPCopyPlane(pic->a + a_offset, pic->a_stride, + tmp.a, tmp.a_stride, width, height); + } + } else { + const uint8_t* const src = + (const uint8_t*)(pic->argb + top * pic->argb_stride + left); + WebPCopyPlane(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, + rescaler_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, work); + while (y < src_height) { + y += WebPRescalerImport(&rescaler, src_height - y, + src + y * src_stride, src_stride); + WebPRescalerExport(&rescaler); + } +} + +static void AlphaMultiplyARGB(WebPPicture* const pic, int inverse) { + assert(pic->argb != NULL); + WebPMultARGBRows((uint8_t*)pic->argb, pic->argb_stride * sizeof(*pic->argb), + pic->width, pic->height, inverse); +} + +static void AlphaMultiplyY(WebPPicture* const pic, int inverse) { + if (pic->a != NULL) { + WebPMultRows(pic->y, pic->y_stride, pic->a, pic->a_stride, + pic->width, pic->height, inverse); + } +} + +int WebPPictureRescale(WebPPicture* pic, int width, int height) { + WebPPicture tmp; + int prev_width, prev_height; + rescaler_t* work; + + if (pic == NULL) return 0; + prev_width = pic->width; + prev_height = pic->height; + if (!WebPRescalerGetScaledDimensions( + prev_width, prev_height, &width, &height)) { + return 0; + } + + PictureGrabSpecs(pic, &tmp); + tmp.width = width; + tmp.height = height; + if (!WebPPictureAlloc(&tmp)) return 0; + + if (!pic->use_argb) { + work = (rescaler_t*)WebPSafeMalloc(2ULL * width, sizeof(*work)); + if (work == NULL) { + WebPPictureFree(&tmp); + return 0; + } + // If present, we need to rescale alpha first (for AlphaMultiplyY). + if (pic->a != NULL) { + WebPInitAlphaProcessing(); + RescalePlane(pic->a, prev_width, prev_height, pic->a_stride, + tmp.a, width, height, tmp.a_stride, work, 1); + } + + // We take transparency into account on the luma plane only. That's not + // totally exact blending, but still is a good approximation. + AlphaMultiplyY(pic, 0); + RescalePlane(pic->y, prev_width, prev_height, pic->y_stride, + tmp.y, width, height, tmp.y_stride, work, 1); + AlphaMultiplyY(&tmp, 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); + } else { + work = (rescaler_t*)WebPSafeMalloc(2ULL * width * 4, sizeof(*work)); + if (work == NULL) { + WebPPictureFree(&tmp); + return 0; + } + // In order to correctly interpolate colors, we need to apply the alpha + // weighting first (black-matting), scale the RGB values, and remove + // the premultiplication afterward (while preserving the alpha channel). + WebPInitAlphaProcessing(); + AlphaMultiplyARGB(pic, 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); + AlphaMultiplyARGB(&tmp, 1); + } + WebPPictureFree(pic); + WebPSafeFree(work); + *pic = tmp; + return 1; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/enc/picture_tools.c b/thirdparty/libwebp/enc/picture_tools.c new file mode 100644 index 0000000000..bf97af8408 --- /dev/null +++ b/thirdparty/libwebp/enc/picture_tools.c @@ -0,0 +1,226 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 tools: alpha handling, etc. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> + +#include "./vp8enci.h" +#include "../dsp/yuv.h" + +static WEBP_INLINE uint32_t MakeARGB32(int r, int g, int b) { + return (0xff000000u | (r << 16) | (g << 8) | b); +} + +//------------------------------------------------------------------------------ +// 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 int is_transparent_argb_area(const uint32_t* ptr, int stride, int size) { + int y, x; + for (y = 0; y < size; ++y) { + for (x = 0; x < size; ++x) { + if (ptr[x] & 0xff000000u) { + return 0; + } + } + ptr += stride; + } + return 1; +} + +static 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; + } +} + +static void flatten_argb(uint32_t* ptr, uint32_t v, int stride, int size) { + int x, y; + for (y = 0; y < size; ++y) { + for (x = 0; x < size; ++x) ptr[x] = v; + ptr += stride; + } +} + +void WebPCleanupTransparentArea(WebPPicture* pic) { + int x, y, w, h; + if (pic == NULL) return; + w = pic->width / SIZE; + h = pic->height / SIZE; + + // note: we ignore the left-overs on right/bottom + if (pic->use_argb) { + uint32_t argb_value = 0; + for (y = 0; y < h; ++y) { + int need_reset = 1; + for (x = 0; x < w; ++x) { + const int off = (y * pic->argb_stride + x) * SIZE; + if (is_transparent_argb_area(pic->argb + off, pic->argb_stride, SIZE)) { + if (need_reset) { + argb_value = pic->argb[off]; + need_reset = 0; + } + flatten_argb(pic->argb + off, argb_value, pic->argb_stride, SIZE); + } else { + need_reset = 1; + } + } + } + } else { + const uint8_t* const a_ptr = pic->a; + int values[3] = { 0 }; + if (a_ptr == NULL) return; // nothing to do + 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; + } + } + } + } +} + +#undef SIZE +#undef SIZE2 + +void WebPCleanupTransparentAreaLossless(WebPPicture* const pic) { + int x, y, w, h; + uint32_t* argb; + assert(pic != NULL && pic->use_argb); + w = pic->width; + h = pic->height; + argb = pic->argb; + + for (y = 0; y < h; ++y) { + for (x = 0; x < w; ++x) { + if ((argb[x] & 0xff000000) == 0) { + argb[x] = 0x00000000; + } + } + argb += pic->argb_stride; + } +} + +//------------------------------------------------------------------------------ +// Blend color and remove transparency info + +#define BLEND(V0, V1, ALPHA) \ + ((((V0) * (255 - (ALPHA)) + (V1) * (ALPHA)) * 0x101) >> 16) +#define BLEND_10BIT(V0, V1, ALPHA) \ + ((((V0) * (1020 - (ALPHA)) + (V1) * (ALPHA)) * 0x101) >> 18) + +void WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb) { + const int red = (background_rgb >> 16) & 0xff; + const int green = (background_rgb >> 8) & 0xff; + const int blue = (background_rgb >> 0) & 0xff; + int x, y; + if (pic == NULL) return; + if (!pic->use_argb) { + const int uv_width = (pic->width >> 1); // omit last pixel during u/v loop + const int Y0 = VP8RGBToY(red, green, blue, YUV_HALF); + // VP8RGBToU/V expects the u/v values summed over four pixels + const int U0 = VP8RGBToU(4 * red, 4 * green, 4 * blue, 4 * YUV_HALF); + const int V0 = VP8RGBToV(4 * red, 4 * green, 4 * blue, 4 * YUV_HALF); + const int has_alpha = pic->colorspace & WEBP_CSP_ALPHA_BIT; + if (!has_alpha || pic->a == NULL) return; // nothing to do + for (y = 0; y < pic->height; ++y) { + // Luma blending + uint8_t* const y_ptr = pic->y + y * pic->y_stride; + uint8_t* const a_ptr = pic->a + y * pic->a_stride; + for (x = 0; x < pic->width; ++x) { + const int alpha = a_ptr[x]; + if (alpha < 0xff) { + y_ptr[x] = BLEND(Y0, y_ptr[x], a_ptr[x]); + } + } + // Chroma blending every even line + if ((y & 1) == 0) { + uint8_t* const u = pic->u + (y >> 1) * pic->uv_stride; + uint8_t* const v = pic->v + (y >> 1) * pic->uv_stride; + uint8_t* const a_ptr2 = + (y + 1 == pic->height) ? a_ptr : a_ptr + pic->a_stride; + for (x = 0; x < uv_width; ++x) { + // Average four alpha values into a single blending weight. + // TODO(skal): might lead to visible contouring. Can we do better? + const int alpha = + a_ptr[2 * x + 0] + a_ptr[2 * x + 1] + + a_ptr2[2 * x + 0] + a_ptr2[2 * x + 1]; + u[x] = BLEND_10BIT(U0, u[x], alpha); + v[x] = BLEND_10BIT(V0, v[x], alpha); + } + if (pic->width & 1) { // rightmost pixel + const int alpha = 2 * (a_ptr[2 * x + 0] + a_ptr2[2 * x + 0]); + u[x] = BLEND_10BIT(U0, u[x], alpha); + v[x] = BLEND_10BIT(V0, v[x], alpha); + } + } + memset(a_ptr, 0xff, pic->width); + } + } else { + uint32_t* argb = pic->argb; + const uint32_t background = MakeARGB32(red, green, blue); + for (y = 0; y < pic->height; ++y) { + for (x = 0; x < pic->width; ++x) { + const int alpha = (argb[x] >> 24) & 0xff; + if (alpha != 0xff) { + if (alpha > 0) { + int r = (argb[x] >> 16) & 0xff; + int g = (argb[x] >> 8) & 0xff; + int b = (argb[x] >> 0) & 0xff; + r = BLEND(red, r, alpha); + g = BLEND(green, g, alpha); + b = BLEND(blue, b, alpha); + argb[x] = MakeARGB32(r, g, b); + } else { + argb[x] = background; + } + } + } + argb += pic->argb_stride; + } + } +} + +#undef BLEND +#undef BLEND_10BIT + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/enc/quant.c b/thirdparty/libwebp/enc/quant.c new file mode 100644 index 0000000000..549ad26f93 --- /dev/null +++ b/thirdparty/libwebp/enc/quant.c @@ -0,0 +1,1283 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <math.h> +#include <stdlib.h> // for abs() + +#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 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. + +// 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) + +#define RD_DISTO_MULT 256 // distortion multiplier (equivalent of lambda) + +// #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); + const uint8_t* const y_in = it->yuv_in_ + Y_OFF_ENC; + const uint8_t* const y_out = it->yuv_out_ + Y_OFF_ENC; + const uint8_t* const uv_in = it->yuv_in_ + U_OFF_ENC; + const uint8_t* const uv_out = it->yuv_out_ + U_OFF_ENC; + printf("SOURCE / OUTPUT / ABS DELTA\n"); + for (j = 0; j < 16; ++j) { + for (i = 0; i < 16; ++i) printf("%3d ", y_in[i + j * BPS]); + printf(" "); + for (i = 0; i < 16; ++i) printf("%3d ", y_out[i + j * BPS]); + printf(" "); + for (i = 0; i < 16; ++i) { + printf("%1d ", abs(y_in[i + j * BPS] - y_out[i + j * BPS])); + } + printf("\n"); + } + printf("\n"); // newline before the U/V block + for (j = 0; j < 8; ++j) { + for (i = 0; i < 8; ++i) printf("%3d ", uv_in[i + j * BPS]); + printf(" "); + for (i = 8; i < 16; ++i) printf("%3d ", uv_in[i + j * BPS]); + printf(" "); + for (i = 0; i < 8; ++i) printf("%3d ", uv_out[i + j * BPS]); + printf(" "); + for (i = 8; i < 16; ++i) printf("%3d ", uv_out[i + j * BPS]); + printf(" "); + for (i = 0; i < 8; ++i) { + printf("%1d ", abs(uv_out[i + j * BPS] - uv_in[i + j * BPS])); + } + printf(" "); + for (i = 8; i < 16; ++i) { + printf("%1d ", abs(uv_out[i + j * BPS] - uv_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 + +//------------------------------------------------------------------------------ + +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 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. +// 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, + 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, 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 (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; +} + +static void CheckLambdaValue(int* const v) { if (*v < 1) *v = 1; } + +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 q_i4, q_i16, q_uv; + 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)]; + + q_i4 = ExpandMatrix(&m->y1_, 0); + q_i16 = ExpandMatrix(&m->y2_, 1); + q_uv = ExpandMatrix(&m->uv_, 2); + + m->lambda_i4_ = (3 * q_i4 * q_i4) >> 7; + m->lambda_i16_ = (3 * q_i16 * q_i16); + m->lambda_uv_ = (3 * q_uv * q_uv) >> 6; + m->lambda_mode_ = (1 * q_i4 * q_i4) >> 7; + m->lambda_trellis_i4_ = (7 * q_i4 * q_i4) >> 3; + m->lambda_trellis_i16_ = (q_i16 * q_i16) >> 2; + m->lambda_trellis_uv_ = (q_uv * q_uv) << 1; + m->tlambda_ = (tlambda_scale * q_i4) >> 5; + + // none of these constants should be < 1 + CheckLambdaValue(&m->lambda_i4_); + CheckLambdaValue(&m->lambda_i16_); + CheckLambdaValue(&m->lambda_uv_); + CheckLambdaValue(&m->lambda_mode_); + CheckLambdaValue(&m->lambda_trellis_i4_); + CheckLambdaValue(&m->lambda_trellis_i16_); + CheckLambdaValue(&m->lambda_trellis_uv_); + CheckLambdaValue(&m->tlambda_); + + m->min_disto_ = 10 * m->y1_.q_[0]; // quantization-aware min disto + m->max_edge_ = 0; + + m->i4_penalty_ = 1000 * q_i4 * q_i4; + } +} + +//------------------------------------------------------------------------------ +// 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 2 + +static void SetupFilterStrength(VP8Encoder* const enc) { + int i; + // 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) { + 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_; + 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 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 }; + // 'num_segments_' is previously validated and <= NUM_MB_SEGMENTS, but an + // explicit check is needed to avoid a spurious warning about 'i' exceeding + // array bounds of 'dqm_' with some compilers (noticed with gcc-4.9). + const int num_segments = (enc->segment_hdr_.num_segments_ < NUM_MB_SEGMENTS) + ? enc->segment_hdr_.num_segments_ + : NUM_MB_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->segment_hdr_.num_segments_; + const double amp = SNS_TO_DQ * enc->config_->sns_strength / 100. / 128.; + 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) { + // 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.); + 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 unpleasant). + 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; + + SetupFilterStrength(enc); // initialize segments' filtering, eventually + + if (num_segments > 1) SimplifySegments(enc); + + SetupMatrices(enc); // finalize quantization matrices +} + +//------------------------------------------------------------------------------ +// 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 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 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); +} + +void VP8MakeIntra4Preds(const VP8EncIterator* const it) { + VP8EncPredLuma4(it->yuv_p_, it->i4_top_); +} + +//------------------------------------------------------------------------------ +// Quantize + +// Layout: +// +----+----+ +// |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 +}; + +//------------------------------------------------------------------------------ +// 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->H = 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->H = src->H; + 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->H += src->H; + dst->nz |= src->nz; // here, new nz bits are accumulated. + dst->score += src->score; +} + +//------------------------------------------------------------------------------ +// Performs trellis-optimized quantization. + +// Trellis node +typedef struct { + 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)][(l) + MIN_DELTA]) +#define SCORE_STATE(n, l) (score_states[n][(l) + MIN_DELTA]) + +static WEBP_INLINE void SetRDScore(int lambda, VP8ModeScore* const rd) { + rd->score = (rd->R + rd->H) * lambda + RD_DISTO_MULT * (rd->D + rd->SD); +} + +static WEBP_INLINE score_t RDScoreTrellis(int lambda, score_t rate, + score_t distortion) { + return rate * lambda + RD_DISTO_MULT * distortion; +} + +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) { + 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[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 n, m, p, last; + + { + score_t cost; + const int thresh = mtx->q_[1] * mtx->q_[1] / 4; + const int last_proba = probas[VP8EncBands[first]][ctx0][0]; + + // 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]; + 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. + 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, 0); + + // initialize source node. + for (m = -MIN_DELTA; m <= MAX_DELTA; ++m) { + 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 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); + 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; + } + + // test all alternate level values around level0. + for (m = -MIN_DELTA; m <= MAX_DELTA; ++m) { + Node* const cur = &NODE(n, m); + int level = level0 + m; + 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; + } + + // 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) { + // 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. + 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; + } + } + // 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 + } + } + } + } + + // 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. + 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); + } +} + +#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_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 += 2) { + VP8FTransform2(src + VP8Scan[n], ref + VP8Scan[n], tmp[n]); + } + VP8FTransformWHT(tmp[0], dc_tmp); + nz |= VP8EncQuantizeBlockWHT(dc_tmp, rd->y_dc_levels, &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(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 += 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 + VP8TransformWHT(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(enc, tmp, levels, ctx, 3, &dqm->y1_, + dqm->lambda_trellis_i4_); + } else { + nz = VP8EncQuantizeBlock(tmp, levels, &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_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 += 2) { + VP8FTransform2(src + VP8ScanUV[n], ref + VP8ScanUV[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(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 += 2) { + nz |= VP8EncQuantize2Blocks(tmp[n], rd->uv_levels[n], &dqm->uv_) << n; + } + } + + for (n = 0; n < 8; n += 2) { + 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 + 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; + *a = *b; + *b = tmp; +} + +static void SwapOut(VP8EncIterator* const it) { + SwapPtr(&it->yuv_out_, &it->yuv_out2_); +} + +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_ENC; + VP8ModeScore rd_tmp; + VP8ModeScore* rd_cur = &rd_tmp; + VP8ModeScore* rd_best = rd; + int mode; + + rd->mode_i16 = -1; + 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 + rd_cur->nz = ReconstructIntra16(it, rd_cur, tmp_dst, mode); + + // Measure RD-score + 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, 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); + } +} + +//------------------------------------------------------------------------------ + +// 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_ENC; + uint8_t* const best_blocks = it->yuv_out2_ + Y_OFF_ENC; + int total_header_bits = 0; + VP8ModeScore rd_best; + + if (enc->max_i4_header_bits_ == 0) { + return 0; + } + + InitScore(&rd_best); + 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; + 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.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(rd_best.y_ac_levels[it->i4_])); + } + } + SetRDScore(dqm->lambda_mode_, &rd_i4); + AddScore(&rd_best, &rd_i4); + 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_]) { + 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 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_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 < NUM_PRED_MODES; ++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; // not calling TDisto here: it tends to flatten areas. + rd_uv.H = VP8FixedCostsUV[mode]; + rd_uv.R = VP8GetCostUV(it, &rd_uv); + 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)); + SwapPtr(&dst, &tmp_dst); + } + } + VP8SetIntraUVMode(it, rd->mode_uv); + AddScore(rd, &rd_best); + if (dst != dst0) { // copy 16x8 block if needed + VP8Copy16x8(dst, dst0); + } +} + +//------------------------------------------------------------------------------ +// Final reconstruction and quantization. + +static void SimpleQuantize(VP8EncIterator* const it, VP8ModeScore* const rd) { + const VP8Encoder* const enc = it->enc_; + const int is_i16 = (it->mb_->type_ == 1); + int nz = 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_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_ENC)); + } + + 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 RefineUsingDistortion(VP8EncIterator* const it, + int try_both_modes, int refine_uv_mode, + VP8ModeScore* const rd) { + score_t best_score = MAX_COST; + int nz = 0; + int mode; + int is_i16 = try_both_modes || (it->mb_->type_ == 1); + + const VP8SegmentInfo* const dqm = &it->enc_->dqm_[it->mb_->segment_]; + // Some empiric constants, of approximate order of magnitude. + const int lambda_d_i16 = 106; + const int lambda_d_i4 = 11; + const int lambda_d_uv = 120; + score_t score_i4 = dqm->i4_penalty_; + score_t i4_bit_sum = 0; + const score_t bit_limit = it->enc_->mb_header_limit_; + + if (is_i16) { // First, evaluate Intra16 distortion + int best_mode = -1; + const uint8_t* const src = it->yuv_in_ + Y_OFF_ENC; + for (mode = 0; mode < NUM_PRED_MODES; ++mode) { + const uint8_t* const ref = it->yuv_p_ + VP8I16ModeOffsets[mode]; + const score_t score = VP8SSE16x16(src, ref) * RD_DISTO_MULT + + VP8FixedCostsI16[mode] * lambda_d_i16; + if (mode > 0 && VP8FixedCostsI16[mode] > bit_limit) { + continue; + } + if (score < best_score) { + best_mode = mode; + best_score = score; + } + } + VP8SetIntra16Mode(it, best_mode); + // we'll reconstruct later, if i16 mode actually gets selected + } + + // Next, evaluate Intra4 + if (try_both_modes || !is_i16) { + // 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). + is_i16 = 0; + VP8IteratorStartI4(it); + do { + int best_i4_mode = -1; + score_t best_i4_score = MAX_COST; + const uint8_t* const src = it->yuv_in_ + Y_OFF_ENC + VP8Scan[it->i4_]; + const uint16_t* const mode_costs = GetCostModeI4(it, rd->modes_i4); + + 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) * RD_DISTO_MULT + + mode_costs[mode] * lambda_d_i4; + if (score < best_i4_score) { + best_i4_mode = mode; + best_i4_score = score; + } + } + i4_bit_sum += mode_costs[best_i4_mode]; + rd->modes_i4[it->i4_] = best_i4_mode; + score_i4 += best_i4_score; + if (score_i4 >= best_score || i4_bit_sum > bit_limit) { + // Intra4 won't be better than Intra16. Bail out and pick Intra16. + is_i16 = 1; + break; + } else { // reconstruct partial block inside yuv_out2_ buffer + uint8_t* const tmp_dst = it->yuv_out2_ + Y_OFF_ENC + VP8Scan[it->i4_]; + nz |= ReconstructIntra4(it, rd->y_ac_levels[it->i4_], + src, tmp_dst, best_i4_mode) << it->i4_; + } + } while (VP8IteratorRotateI4(it, it->yuv_out2_ + Y_OFF_ENC)); + } + + // Final reconstruction, depending on which mode is selected. + if (!is_i16) { + VP8SetIntra4Mode(it, rd->modes_i4); + SwapOut(it); + best_score = score_i4; + } else { + nz = ReconstructIntra16(it, rd, it->yuv_out_ + Y_OFF_ENC, it->preds_[0]); + } + + // ... and UV! + if (refine_uv_mode) { + int best_mode = -1; + score_t best_uv_score = MAX_COST; + const uint8_t* const src = it->yuv_in_ + U_OFF_ENC; + for (mode = 0; mode < NUM_PRED_MODES; ++mode) { + const uint8_t* const ref = it->yuv_p_ + VP8UVModeOffsets[mode]; + const score_t score = VP8SSE16x8(src, ref) * RD_DISTO_MULT + + VP8FixedCostsUV[mode] * lambda_d_uv; + if (score < best_uv_score) { + best_mode = mode; + best_uv_score = score; + } + } + VP8SetIntraUVMode(it, best_mode); + } + nz |= ReconstructUV(it, rd, it->yuv_out_ + U_OFF_ENC, it->mb_->uv_mode_); + + rd->nz = nz; + rd->score = best_score; +} + +//------------------------------------------------------------------------------ +// Entry point + +int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, + VP8RDLevel rd_opt) { + int is_skipped; + const int method = it->enc_->method_; + + InitScore(rd); + + // We can perform predictions for Luma16x16 and Chroma8x8 already. + // Luma4x4 predictions needs to be done as-we-go. + VP8MakeLuma16Preds(it); + VP8MakeChroma8Preds(it); + + if (rd_opt > RD_OPT_NONE) { + it->do_trellis_ = (rd_opt >= RD_OPT_TRELLIS_ALL); + PickBestIntra16(it, rd); + if (method >= 2) { + PickBestIntra4(it, rd); + } + PickBestUV(it, rd); + if (rd_opt == RD_OPT_TRELLIS) { // finish off with trellis-optim now + it->do_trellis_ = 1; + SimpleQuantize(it, rd); + } + } else { + // At this point we have heuristically decided intra16 / intra4. + // For method >= 2, pick the best intra4/intra16 based on SSE (~tad slower). + // For method <= 1, we don't re-examine the decision but just go ahead with + // quantization/reconstruction. + RefineUsingDistortion(it, (method >= 2), (method >= 1), rd); + } + is_skipped = (rd->nz == 0); + VP8SetSkip(it, is_skipped); + return is_skipped; +} diff --git a/thirdparty/libwebp/enc/syntax.c b/thirdparty/libwebp/enc/syntax.c new file mode 100644 index 0000000000..a0e79ef404 --- /dev/null +++ b/thirdparty/libwebp/enc/syntax.c @@ -0,0 +1,383 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> + +#include "../utils/utils.h" +#include "../webp/format_constants.h" // RIFF constants +#include "../webp/mux_types.h" // ALPHA_FLAG +#include "./vp8enci.h" + +//------------------------------------------------------------------------------ +// Helper functions + +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; + } + + 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 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; + 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) { + VP8PutSignedBits(bw, enc->dqm_[s].quant_, 7); + } + for (s = 0; s < NUM_MB_SEGMENTS; ++s) { + VP8PutSignedBits(bw, enc->dqm_[s].fstrength_, 6); + } + } + if (hdr->update_map_) { + for (s = 0; s < 3; ++s) { + if (VP8PutBitUniform(bw, (proba->segments_[s] != 255u))) { + VP8PutBits(bw, proba->segments_[s], 8); + } + } + } + } +} + +// Filtering parameters header +static void PutFilterHeader(VP8BitWriter* const bw, + const VP8EncFilterHeader* const hdr) { + const int use_lf_delta = (hdr->i4x4_lf_delta_ != 0); + VP8PutBitUniform(bw, hdr->simple_); + 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 + VP8PutBits(bw, 0, 4); + // we use mode_lf_delta for i4x4 + VP8PutSignedBits(bw, hdr->i4x4_lf_delta_, 6); + VP8PutBits(bw, 0, 3); // all others unused + } + } +} + +// Nominal quantization parameters +static void PutQuant(VP8BitWriter* const bw, + const VP8Encoder* const enc) { + 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 +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; +} + +//------------------------------------------------------------------------------ + +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; + + pos1 = VP8BitWriterPos(bw); + 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 + VP8PutBitUniform(bw, 0); // clamp type + + PutSegmentHeader(bw, enc); + PutFilterHeader(bw, &enc->filter_hdr_); + 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_); + pos2 = VP8BitWriterPos(bw); + VP8CodeIntraModes(enc); + VP8BitWriterFinish(bw); + + 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_; + } + if (bw->error_) { + return WebPEncodingSetError(enc->pic_, VP8_ENC_ERROR_OUT_OF_MEMORY); + } + return 1; +} + +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); + if (!ok) return 0; + + // 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; +} + +//------------------------------------------------------------------------------ + diff --git a/thirdparty/libwebp/enc/token.c b/thirdparty/libwebp/enc/token.c new file mode 100644 index 0000000000..e73256b37e --- /dev/null +++ b/thirdparty/libwebp/enc/token.c @@ -0,0 +1,285 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Paginated token buffer +// +// A 'token' is a bit value associated with a probability, either fixed +// or a later-to-be-determined after statistics have been collected. +// For dynamic probability, we just record the slot id (idx) for the probability +// value in the final probability array (uint8_t* probas in VP8EmitTokens). +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include <string.h> + +#include "./cost.h" +#include "./vp8enci.h" +#include "../utils/utils.h" + +#if !defined(DISABLE_TOKEN_BUFFER) + +// we use pages to reduce the number of memcpy() +#define MIN_PAGE_SIZE 8192 // minimum number of token per page +#define FIXED_PROBA_BIT (1u << 14) + +typedef uint16_t token_t; // bit #15: bit value + // bit #14: flags for constant proba or idx + // bits #0..13: slot or constant proba +struct VP8Tokens { + VP8Tokens* next_; // pointer to next page +}; +// Token data is located in memory just after the next_ field. +// This macro is used to return their address and hide the trick. +#define TOKEN_DATA(p) ((const token_t*)&(p)[1]) + +//------------------------------------------------------------------------------ + +void VP8TBufferInit(VP8TBuffer* const b, int page_size) { + b->tokens_ = NULL; + b->pages_ = NULL; + b->last_page_ = &b->pages_; + b->left_ = 0; + b->page_size_ = (page_size < MIN_PAGE_SIZE) ? MIN_PAGE_SIZE : page_size; + b->error_ = 0; +} + +void VP8TBufferClear(VP8TBuffer* const b) { + if (b != NULL) { + VP8Tokens* p = b->pages_; + while (p != NULL) { + VP8Tokens* const next = p->next_; + WebPSafeFree(p); + p = next; + } + VP8TBufferInit(b, b->page_size_); + } +} + +static int TBufferNewPage(VP8TBuffer* const b) { + VP8Tokens* page = NULL; + if (!b->error_) { + const size_t size = sizeof(*page) + b->page_size_ * sizeof(token_t); + page = (VP8Tokens*)WebPSafeMalloc(1ULL, size); + } + if (page == NULL) { + b->error_ = 1; + return 0; + } + page->next_ = NULL; + + *b->last_page_ = page; + b->last_page_ = &page->next_; + b->left_ = b->page_size_; + b->tokens_ = (token_t*)TOKEN_DATA(page); + return 1; +} + +//------------------------------------------------------------------------------ + +#define TOKEN_ID(t, b, ctx) \ + (NUM_PROBAS * ((ctx) + NUM_CTX * ((b) + NUM_BANDS * (t)))) + +static WEBP_INLINE uint32_t AddToken(VP8TBuffer* const b, + uint32_t bit, uint32_t proba_idx) { + assert(proba_idx < FIXED_PROBA_BIT); + assert(bit <= 1); + if (b->left_ > 0 || TBufferNewPage(b)) { + const int slot = --b->left_; + b->tokens_[slot] = (bit << 15) | proba_idx; + } + return bit; +} + +static WEBP_INLINE void AddConstantToken(VP8TBuffer* const b, + uint32_t bit, uint32_t proba) { + assert(proba < 256); + assert(bit <= 1); + if (b->left_ > 0 || TBufferNewPage(b)) { + const int slot = --b->left_; + b->tokens_[slot] = (bit << 15) | FIXED_PROBA_BIT | proba; + } +} + +int VP8RecordCoeffTokens(const int ctx, const int coeff_type, + int first, int last, + const int16_t* const coeffs, + VP8TBuffer* const tokens) { + int n = first; + uint32_t base_id = TOKEN_ID(coeff_type, n, ctx); + if (!AddToken(tokens, last >= 0, base_id + 0)) { + return 0; + } + + while (n < 16) { + const int c = coeffs[n++]; + const int sign = c < 0; + const uint32_t v = sign ? -c : c; + if (!AddToken(tokens, v != 0, base_id + 1)) { + base_id = TOKEN_ID(coeff_type, VP8EncBands[n], 0); // ctx=0 + continue; + } + if (!AddToken(tokens, v > 1, base_id + 2)) { + base_id = TOKEN_ID(coeff_type, VP8EncBands[n], 1); // ctx=1 + } else { + if (!AddToken(tokens, v > 4, base_id + 3)) { + if (AddToken(tokens, v != 2, base_id + 4)) + AddToken(tokens, v == 4, base_id + 5); + } else if (!AddToken(tokens, v > 10, base_id + 6)) { + if (!AddToken(tokens, v > 6, base_id + 7)) { + AddConstantToken(tokens, v == 6, 159); + } else { + AddConstantToken(tokens, v >= 9, 165); + AddConstantToken(tokens, !(v & 1), 145); + } + } else { + int mask; + const uint8_t* tab; + uint32_t residue = v - 3; + if (residue < (8 << 1)) { // VP8Cat3 (3b) + AddToken(tokens, 0, base_id + 8); + AddToken(tokens, 0, base_id + 9); + residue -= (8 << 0); + mask = 1 << 2; + tab = VP8Cat3; + } else if (residue < (8 << 2)) { // VP8Cat4 (4b) + AddToken(tokens, 0, base_id + 8); + AddToken(tokens, 1, base_id + 9); + residue -= (8 << 1); + mask = 1 << 3; + tab = VP8Cat4; + } else if (residue < (8 << 3)) { // VP8Cat5 (5b) + AddToken(tokens, 1, base_id + 8); + AddToken(tokens, 0, base_id + 10); + residue -= (8 << 2); + mask = 1 << 4; + tab = VP8Cat5; + } else { // VP8Cat6 (11b) + AddToken(tokens, 1, base_id + 8); + AddToken(tokens, 1, base_id + 10); + residue -= (8 << 3); + mask = 1 << 10; + tab = VP8Cat6; + } + while (mask) { + AddConstantToken(tokens, !!(residue & mask), *tab++); + mask >>= 1; + } + } + base_id = TOKEN_ID(coeff_type, VP8EncBands[n], 2); // ctx=2 + } + AddConstantToken(tokens, sign, 128); + if (n == 16 || !AddToken(tokens, n <= last, base_id + 0)) { + return 1; // EOB + } + } + return 1; +} + +#undef TOKEN_ID + +//------------------------------------------------------------------------------ +// This function works, but isn't currently used. Saved for later. + +#if 0 + +static void 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; +} + +void VP8TokenToStats(const VP8TBuffer* const b, proba_t* const stats) { + const VP8Tokens* p = b->pages_; + while (p != NULL) { + const int N = (p->next_ == NULL) ? b->left_ : 0; + int n = MAX_NUM_TOKEN; + const token_t* const tokens = TOKEN_DATA(p); + while (n-- > N) { + const token_t token = tokens[n]; + if (!(token & FIXED_PROBA_BIT)) { + Record((token >> 15) & 1, stats + (token & 0x3fffu)); + } + } + p = p->next_; + } +} + +#endif // 0 + +//------------------------------------------------------------------------------ +// Final coding pass, with known probabilities + +int VP8EmitTokens(VP8TBuffer* const b, VP8BitWriter* const bw, + const uint8_t* const probas, int final_pass) { + const VP8Tokens* p = b->pages_; + assert(!b->error_); + while (p != NULL) { + const VP8Tokens* const next = p->next_; + const int N = (next == NULL) ? b->left_ : 0; + int n = b->page_size_; + const token_t* const tokens = TOKEN_DATA(p); + while (n-- > N) { + const token_t token = tokens[n]; + const int bit = (token >> 15) & 1; + if (token & FIXED_PROBA_BIT) { + VP8PutBit(bw, bit, token & 0xffu); // constant proba + } else { + VP8PutBit(bw, bit, probas[token & 0x3fffu]); + } + } + if (final_pass) WebPSafeFree((void*)p); + p = next; + } + if (final_pass) b->pages_ = NULL; + return 1; +} + +// Size estimation +size_t VP8EstimateTokenSize(VP8TBuffer* const b, const uint8_t* const probas) { + size_t size = 0; + const VP8Tokens* p = b->pages_; + assert(!b->error_); + while (p != NULL) { + const VP8Tokens* const next = p->next_; + const int N = (next == NULL) ? b->left_ : 0; + int n = b->page_size_; + const token_t* const tokens = TOKEN_DATA(p); + while (n-- > N) { + const token_t token = tokens[n]; + const int bit = token & (1 << 15); + if (token & FIXED_PROBA_BIT) { + size += VP8BitCost(bit, token & 0xffu); + } else { + size += VP8BitCost(bit, probas[token & 0x3fffu]); + } + } + p = next; + } + return size; +} + +//------------------------------------------------------------------------------ + +#else // DISABLE_TOKEN_BUFFER + +void VP8TBufferInit(VP8TBuffer* const b) { + (void)b; +} +void VP8TBufferClear(VP8TBuffer* const b) { + (void)b; +} + +#endif // !DISABLE_TOKEN_BUFFER + diff --git a/thirdparty/libwebp/enc/tree.c b/thirdparty/libwebp/enc/tree.c new file mode 100644 index 0000000000..f141006d19 --- /dev/null +++ b/thirdparty/libwebp/enc/tree.c @@ -0,0 +1,504 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 of token probabilities, intra modes and segments. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./vp8enci.h" + +//------------------------------------------------------------------------------ +// Default probabilities + +// Paragraph 13.5 +const uint8_t + VP8CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { + { { { 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) { + VP8EncProba* 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* const 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)); +} + +//------------------------------------------------------------------------------ +// 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 VP8EncProba* 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])) { + VP8PutBits(bw, p0, 8); + } + } + } + } + } + if (VP8PutBitUniform(bw, probas->use_skip_proba_)) { + VP8PutBits(bw, probas->skip_proba_, 8); + } +} + diff --git a/thirdparty/libwebp/enc/vp8enci.h b/thirdparty/libwebp/enc/vp8enci.h new file mode 100644 index 0000000000..c1fbd7644e --- /dev/null +++ b/thirdparty/libwebp/enc/vp8enci.h @@ -0,0 +1,531 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_ENC_VP8ENCI_H_ +#define WEBP_ENC_VP8ENCI_H_ + +#include <string.h> // for memcpy() +#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" + +#ifdef __cplusplus +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Various defines and enums + +// version numbers +#define ENC_MAJ_VERSION 0 +#define ENC_MIN_VERSION 5 +#define ENC_REV_VERSION 1 + +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) + }; + +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 (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 (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 (2 * 16 * BPS) +#define C8TM8 (C8DC8 + 1 * 16) +#define C8VE8 (2 * 16 * BPS + 8 * BPS) +#define C8HE8 (C8VE8 + 1 * 16) +// intra 4x4 +#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(uint32_t n, uint32_t iQ, uint32_t B) { + return (int)((n * iQ + B) >> QFIX); +} + +// Uncomment the following to remove token-buffer code: +// #define DISABLE_TOKEN_BUFFER + +//------------------------------------------------------------------------------ +// 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 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; + +// 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 +} 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]; // 1056 bytes + StatsArray stats_[NUM_TYPES][NUM_BANDS]; // 4224 bytes + 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 +} VP8EncProba; + +// 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 +} VP8EncFilterHeader; + +//------------------------------------------------------------------------------ +// 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. + 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; + +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 + 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_; + + // lambda values for distortion-based evaluation + score_t i4_penalty_; // penalty for using Intra4 +} VP8SegmentInfo; + +// Handy transient struct to accumulate score and info during RD-optimization +// and mode evaluation. +typedef struct { + 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]; + 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_stride_, uv_stride_; // respective strides + 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 + 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 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 +void VP8IteratorInit(VP8Encoder* const enc, VP8EncIterator* const it); +// restart a scan +void VP8IteratorReset(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 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); +// 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 + +typedef struct VP8Tokens VP8Tokens; // struct details in token.c + +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; + +// initialize an empty buffer +void VP8TBufferInit(VP8TBuffer* const b, int page_size); +void VP8TBufferClear(VP8TBuffer* const b); // de-allocate pages memory + +#if !defined(DISABLE_TOKEN_BUFFER) + +// 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); + +// 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); + +// Estimate the final coded size given a set of 'probas'. +size_t VP8EstimateTokenSize(VP8TBuffer* const b, const uint8_t* const probas); + +// unused for now +void VP8TokenToStats(const VP8TBuffer* const b, proba_t* const stats); + +#endif // !DISABLE_TOKEN_BUFFER + +//------------------------------------------------------------------------------ +// VP8Encoder + +struct VP8Encoder { + const WebPConfig* config_; // user configuration and parameters + WebPPicture* pic_; // input / output picture + + // headers + VP8EncFilterHeader filter_hdr_; // filtering information + VP8EncSegmentHeader 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 + VP8TBuffer tokens_; // token buffer + + int percent_; // for progress + + // transparency blob + int has_alpha_; + uint8_t* alpha_data_; // non-NULL if transparency is present + uint32_t alpha_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_; + int dq_y2_dc_, dq_y2_ac_; + int dq_uv_dc_, dq_uv_ac_; + + // probabilities and statistics + 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. + VP8RDLevel rd_opt_level_; // Deduced from method_. + int max_i4_header_bits_; // partition #0 safeness factor + int mb_header_limit_; // rough limit for header bits per MB + 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* 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) +}; + +//------------------------------------------------------------------------------ +// 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 VP8EncProba* 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 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 +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 coding calls +int VP8EncLoop(VP8Encoder* const enc); +int VP8EncTokenLoop(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, + 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 +int VP8EncDeleteAlpha(VP8Encoder* const enc); // delete compressed data + + // in filter.c +void VP8SSIMAddStats(const VP8DistoStats* const src, VP8DistoStats* const dst); +void VP8SSIMAccumulatePlane(const uint8_t* src1, int stride1, + const uint8_t* src2, int stride2, + int W, int H, VP8DistoStats* const stats); +double VP8SSIMGet(const VP8DistoStats* const stats); +double VP8SSIMGetSquaredError(const VP8DistoStats* const stats); + +// autofilter +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); + +// Clean-up the RGB samples under fully transparent area, to help lossless +// compressibility (no guarantee, though). Assumes that pic->use_argb is true. +void WebPCleanupTransparentAreaLossless(WebPPicture* const pic); + + // 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); +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_ENC_VP8ENCI_H_ */ diff --git a/thirdparty/libwebp/enc/vp8l.c b/thirdparty/libwebp/enc/vp8l.c new file mode 100644 index 0000000000..c16e2560ec --- /dev/null +++ b/thirdparty/libwebp/enc/vp8l.c @@ -0,0 +1,1603 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Vikas Arora (vikaas.arora@gmail.com) +// + +#include <assert.h> +#include <stdlib.h> + +#include "./backward_references.h" +#include "./histogram.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 "../webp/format_constants.h" + +#include "./delta_palettization.h" + +#define PALETTE_KEY_RIGHT_SHIFT 22 // Key for 1K buffer. +// Maximum number of histogram images (sub-blocks). +#define MAX_HUFF_IMAGE_SIZE 2600 + +// Palette reordering for smaller sum of deltas (and for smaller storage). + +static int PaletteCompareColorsForQsort(const void* p1, const void* p2) { + const uint32_t a = WebPMemToUint32(p1); + const uint32_t b = WebPMemToUint32(p2); + 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) { + const int num_colors = WebPGetColorPalette(pic, palette); + if (num_colors > MAX_PALETTE_SIZE) return 0; + *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, + 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; + } + } + *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. + { + 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; + } + } + } + } + WebPSafeFree(histo); + return 1; + } else { + return 0; + } +} + +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, 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 (!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 = 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->palette_code_bits_) : + (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) 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; + 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]; + 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: + WebPSafeFree(huff_tree); + WebPSafeFree(buf_rle); + if (!ok) { + WebPSafeFree(mem_buf); + memset(huffman_codes, 0, 5 * histogram_image_size * sizeof(*huffman_codes)); + } + 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; + } + } + VP8LPutBits(bw, codes_to_store - 4, 4); + for (i = 0; i < codes_to_store; ++i) { + VP8LPutBits(bw, code_length_bitdepth[kStorageOrder[i]], 3); + } +} + +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; + VP8LPutBits(bw, huffman_code->codes[ix], huffman_code->code_lengths[ix]); + switch (ix) { + case 16: + VP8LPutBits(bw, extra_bits, 2); + break; + case 17: + VP8LPutBits(bw, extra_bits, 3); + break; + case 18: + VP8LPutBits(bw, extra_bits, 7); + break; + } + } +} + +// '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; + huffman_code.num_symbols = CODE_LENGTH_CODES; + huffman_code.code_lengths = code_length_bitdepth; + huffman_code.codes = code_length_bitdepth_symbols; + + VP8LPutBits(bw, 0, 1); + num_tokens = VP8LCreateCompressedHuffmanTree(tree, tokens, max_tokens); + { + 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]; + } + + VP8LCreateHuffmanTree(histogram, 7, buf_rle, huff_tree, &huffman_code); + } + + 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; + 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; + VP8LPutBits(bw, nbitpairs - 1, 3); + assert(trimmed_length >= 2); + VP8LPutBits(bw, trimmed_length - 2, nbitpairs * 2); + } + StoreHuffmanTreeToBitMask(bw, tokens, length, &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 }; + 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 + VP8LPutBits(bw, 0x01, 4); + } else if (count <= 2 && symbols[0] < kMaxSymbol && symbols[1] < kMaxSymbol) { + VP8LPutBits(bw, 1, 1); // Small tree marker to encode 1 or 2 symbols. + VP8LPutBits(bw, count - 1, 1); + if (symbols[0] <= 1) { + VP8LPutBits(bw, 0, 1); // Code bit for small (1 bit) symbol value. + VP8LPutBits(bw, symbols[0], 1); + } else { + VP8LPutBits(bw, 1, 1); + VP8LPutBits(bw, symbols[0], 8); + } + if (count == 2) { + VP8LPutBits(bw, symbols[1], 8); + } + } else { + StoreFullHuffmanCode(bw, huff_tree, tokens, huffman_code); + } +} + +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 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, + 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; + 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; + + const int distance = PixOrCopyDistance(v); + VP8LPrefixEncode(v->len, &code, &n_bits, &bits); + WriteHuffmanCodeWithExtraBits(bw, codes, 256 + code, bits, n_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); + 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 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 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 + 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 (VP8LHashChainFill(hash_chain, quality, argb, width, height) == 0) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + 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]); + + // 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. + VP8LPutBits(bw, 0, 1); + + // Find maximum number of symbols for the huffman tree-set. + for (i = 0; i < 5; ++i) { + HuffmanTreeCode* const codes = &huffman_codes[i]; + 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. + err = StoreImageToBitMask(bw, width, 0, refs, histogram_symbols, + huffman_codes); + + Error: + WebPSafeFree(tokens); + WebPSafeFree(huff_tree); + VP8LFreeHistogramSet(histogram_image); + WebPSafeFree(huffman_codes[0].codes); + return err; +} + +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 use_cache, 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 = 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(histogram_image_xysize, + sizeof(*histogram_symbols)); + assert(histogram_bits >= MIN_HUFFMAN_BITS); + assert(histogram_bits <= MAX_HUFFMAN_BITS); + 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 = use_cache ? MAX_COLOR_CACHE_BITS : 0; + // '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 (VP8LHashChainFill(hash_chain, quality, argb, width, height) == 0) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + 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, 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. + histogram_image_size = histogram_image->size; + 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. + 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); + VP8LPutBits(bw, write_histogram_image, 1); + if (write_histogram_image) { + uint32_t* const histogram_argb = + (uint32_t*)WebPSafeMalloc(histogram_image_xysize, + sizeof(*histogram_argb)); + int max_index = 0; + uint32_t i; + if (histogram_argb == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + for (i = 0; i < histogram_image_xysize; ++i) { + 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; + + 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 (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); + } + } + + *hdr_size = (int)(VP8LBitWriterNumBytes(bw) - init_byte_position); + // Store actual literals. + err = StoreImageToBitMask(bw, width, histogram_bits, &refs, + histogram_symbols, huffman_codes); + *data_size = + (int)(VP8LBitWriterNumBytes(bw) - init_byte_position - *hdr_size); + + Error: + WebPSafeFree(tokens); + WebPSafeFree(huff_tree); + VP8LFreeHistogramSet(histogram_image); + VP8LFreeHistogramSet(tmp_histos); + VP8LBackwardRefsClear(&refs); + if (huffman_codes != NULL) { + WebPSafeFree(huffman_codes->codes); + WebPSafeFree(huffman_codes); + } + WebPSafeFree(histogram_symbols); + return err; +} + +// ----------------------------------------------------------------------------- +// Transforms + +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 WebPEncodingError ApplyPredictFilter(const VP8LEncoder* const enc, + int width, int height, + int quality, int low_effort, + int used_subtract_green, + 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); + // we disable near-lossless quantization if palette is used. + const int near_lossless_strength = enc->use_palette_ ? 100 + : enc->config_->near_lossless; + + VP8LResidualImage(width, height, pred_bits, low_effort, enc->argb_, + enc->argb_scratch_, enc->transform_data_, + near_lossless_strength, enc->config_->exact, + used_subtract_green); + VP8LPutBits(bw, TRANSFORM_PRESENT, 1); + VP8LPutBits(bw, PREDICTOR_TRANSFORM, 2); + assert(pred_bits >= 2); + 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 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); + + VP8LColorSpaceTransform(width, height, ccolor_transform_bits, quality, + enc->argb_, enc->transform_data_); + VP8LPutBits(bw, TRANSFORM_PRESENT, 1); + VP8LPutBits(bw, CROSS_COLOR_TRANSFORM, 2); + assert(ccolor_transform_bits >= 2); + 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 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); + + 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) { + VP8LPutBits(bw, has_alpha, 1); + VP8LPutBits(bw, VP8L_VERSION, VP8L_VERSION_BITS); + 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; +} + +// ----------------------------------------------------------------------------- + +static void ClearTransformBuffer(VP8LEncoder* const enc) { + WebPSafeFree(enc->transform_mem_); + enc->transform_mem_ = NULL; + enc->transform_mem_size_ = 0; +} + +// 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 uint64_t image_size = width * height; + // VP8LResidualImage needs room for 2 scanlines of uint32 pixels with an extra + // pixel in each, plus 2 regular scanlines of bytes. + // TODO(skal): Clean up by using arithmetic in bytes instead of words. + const uint64_t argb_scratch_size = + enc->use_predict_ + ? (width + 1) * 2 + + (width * 2 + sizeof(uint32_t) - 1) / sizeof(uint32_t) + : 0; + const uint64_t transform_data_size = + (enc->use_predict_ || enc->use_cross_color_) + ? VP8LSubSampleSize(width, enc->transform_bits_) * + VP8LSubSampleSize(height, enc->transform_bits_) + : 0; + const uint64_t max_alignment_in_words = + (WEBP_ALIGN_CST + sizeof(uint32_t) - 1) / sizeof(uint32_t); + const uint64_t mem_size = + image_size + max_alignment_in_words + + argb_scratch_size + max_alignment_in_words + + transform_data_size; + uint32_t* mem = enc->transform_mem_; + if (mem == NULL || mem_size > enc->transform_mem_size_) { + ClearTransformBuffer(enc); + mem = (uint32_t*)WebPSafeMalloc(mem_size, sizeof(*mem)); + if (mem == NULL) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + enc->transform_mem_ = mem; + enc->transform_mem_size_ = (size_t)mem_size; + } + 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; + Error: + return err; +} + +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) { + memcpy(enc->argb_ + y * width, + picture->argb + y * picture->argb_stride, + width * sizeof(*enc->argb_)); + } + assert(enc->current_width_ == width); + return VP8_ENC_OK; +} + +// ----------------------------------------------------------------------------- + +static int SearchColor(const uint32_t sorted[], uint32_t color, int hi) { + int low = 0; + if (sorted[low] == color) return low; // loop invariant: sorted[low] != color + while (1) { + const int mid = (low + hi) >> 1; + if (sorted[mid] == color) { + return mid; + } else if (sorted[mid] < color) { + low = mid; + } else { + hi = mid; + } + } +} + +// Sort palette in increasing order and prepare an inverse mapping array. +static void PrepareMapToPalette(const uint32_t palette[], int num_colors, + uint32_t sorted[], int idx_map[]) { + int i; + memcpy(sorted, palette, num_colors * sizeof(*sorted)); + qsort(sorted, num_colors, sizeof(*sorted), PaletteCompareColorsForQsort); + for (i = 0; i < num_colors; ++i) { + idx_map[SearchColor(sorted, palette[i], num_colors)] = i; + } +} + +static void MapToPalette(const uint32_t sorted_palette[], int num_colors, + uint32_t* const last_pix, int* const last_idx, + const int idx_map[], + 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) { + prev_idx = idx_map[SearchColor(sorted_palette, pix, num_colors)]; + prev_pix = pix; + } + dst[x] = prev_idx; + } + *last_idx = prev_idx; + *last_pix = prev_pix; +} + +// 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 (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; + int last_idx; + uint32_t sorted[MAX_PALETTE_SIZE]; + int idx_map[MAX_PALETTE_SIZE]; + PrepareMapToPalette(palette, palette_size, sorted, idx_map); + last_pix = palette[0]; + last_idx = 0; + for (y = 0; y < height; ++y) { + MapToPalette(sorted, palette_size, &last_pix, &last_idx, + idx_map, src, tmp_row, width); + VP8LBundleColorMap(tmp_row, width, xbits, dst); + src += src_stride; + dst += dst_stride; + } + } + WebPSafeFree(tmp_row); + return VP8_ENC_OK; +} + +// 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 */); +} + +#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 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); + } + } + + 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*)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) { + if (enc != NULL) { + VP8LHashChainClear(&enc->hash_chain_); + VP8LBackwardRefsClear(&enc->refs_[0]); + VP8LBackwardRefsClear(&enc->refs_[1]); + ClearTransformBuffer(enc); + WebPSafeFree(enc); + } +} + +// ----------------------------------------------------------------------------- +// Main call + +WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, + const WebPPicture* const picture, + VP8LBitWriter* const bw, int use_cache) { + 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; + } + + // --------------------------------------------------------------------------- + // Analyze image (entropy, num_palettes etc) + + if (!AnalyzeAndInit(enc)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + + // Apply near-lossless preprocessing. + use_near_lossless = + (config->near_lossless < 100) && !enc->use_palette_ && !enc->use_predict_; + if (use_near_lossless) { + if (!VP8ApplyNearLossless(width, height, picture->argb, + config->near_lossless)) { + err = VP8_ENC_ERROR_OUT_OF_MEMORY; + goto Error; + } + } + +#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; + 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; + } + } +#endif // WEBP_EXPERIMENTAL_FEATURES + + // 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 (!use_delta_palettization) { + // In case image is not packed. + if (enc->argb_ == NULL) { + err = MakeInputImageCopy(enc); + if (err != VP8_ENC_OK) goto Error; + } + + // ------------------------------------------------------------------------- + // Apply transforms and write transform data. + + if (enc->use_subtract_green_) { + ApplySubtractGreen(enc, enc->current_width_, height, bw); + } + + if (enc->use_predict_) { + err = ApplyPredictFilter(enc, enc->current_width_, height, quality, + low_effort, enc->use_subtract_green_, bw); + if (err != VP8_ENC_OK) 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. + err = EncodeImageInternal(bw, enc->argb_, &enc->hash_chain_, enc->refs_, + enc->current_width_, height, quality, low_effort, + use_cache, &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; + 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); + stats->lossless_hdr_size = hdr_size; + stats->lossless_data_size = data_size; + } + + 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; + int initial_size; + 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; + // 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; + } + + 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, 1 /*use_cache*/); + 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; + VP8LBitWriterWipeOut(&bw); + if (err != VP8_ENC_OK) { + WebPEncodingSetError(picture, err); + return 0; + } + return 1; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/enc/vp8li.h b/thirdparty/libwebp/enc/vp8li.h new file mode 100644 index 0000000000..371e276ee0 --- /dev/null +++ b/thirdparty/libwebp/enc/vp8li.h @@ -0,0 +1,81 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Vikas Arora (vikaas.arora@gmail.com) + +#ifndef WEBP_ENC_VP8LI_H_ +#define WEBP_ENC_VP8LI_H_ + +#include "./backward_references.h" +#include "./histogram.h" +#include "../utils/bit_writer.h" +#include "../webp/encode.h" +#include "../webp/format_constants.h" + +#ifdef __cplusplus +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. + uint32_t* transform_mem_; // Currently allocated memory. + size_t transform_mem_size_; // Currently allocated memory size. + + 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]; + + // 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; + +//------------------------------------------------------------------------------ +// 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. +// If 'use_cache' is false, disables the use of color cache. +WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, + const WebPPicture* const picture, + VP8LBitWriter* const bw, int use_cache); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_ENC_VP8LI_H_ */ diff --git a/thirdparty/libwebp/enc/webpenc.c b/thirdparty/libwebp/enc/webpenc.c new file mode 100644 index 0000000000..a7d04ea2ce --- /dev/null +++ b/thirdparty/libwebp/enc/webpenc.c @@ -0,0 +1,395 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include <math.h> + +#include "./cost.h" +#include "./vp8enci.h" +#include "./vp8li.h" +#include "../utils/utils.h" + +// #define PRINT_MEMORY_INFO + +#ifdef PRINT_MEMORY_INFO +#include <stdio.h> +#endif + +//------------------------------------------------------------------------------ + +int WebPGetEncoderVersion(void) { + return (ENC_MAJ_VERSION << 16) | (ENC_MIN_VERSION << 8) | ENC_REV_VERSION; +} + +//------------------------------------------------------------------------------ +// VP8Encoder +//------------------------------------------------------------------------------ + +static void ResetSegmentHeader(VP8Encoder* const enc) { + 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) { + VP8EncFilterHeader* 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 +} + +// 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-refine i4/16| x | x | x | | | | | +//-------------------+---+---+---+---+---+---+---+ +// disto-refine uv | | x | 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 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) ? 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. + + // partition0 = 512k max. + enc->mb_header_limit_ = + (score_t)256 * 510 * 8 * 1024 / (enc->mb_w_ * enc->mb_h_); + + 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 (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): 419328 + +static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, + WebPPicture* const picture) { + VP8Encoder* enc; + 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(*enc->preds_); + const int top_stride = mb_w * 16; + const size_t nz_size = (mb_w + 1) * sizeof(*enc->nz_) + WEBP_ALIGN_CST; + const size_t info_size = mb_w * mb_h * sizeof(*enc->mb_info_); + const size_t samples_size = + 2 * top_stride * sizeof(*enc->y_top_) // top-luma/u/v + + WEBP_ALIGN_CST; // align all + const size_t lf_stats_size = + config->autofilter ? sizeof(*enc->lf_stats_) + WEBP_ALIGN_CST : 0; + uint8_t* mem; + const uint64_t size = (uint64_t)sizeof(*enc) // main struct + + WEBP_ALIGN_CST // cache alignment + + 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" + " info: %ld\n" + " preds: %ld\n" + " top samples: %ld\n" + " non-zero: %ld\n" + " lf-stats: %ld\n" + " total: %ld\n", + sizeof(*enc) + WEBP_ALIGN_CST, info_size, + preds_size, samples_size, nz_size, lf_stats_size, size); + printf("Transient object sizes:\n" + " VP8EncIterator: %ld\n" + " VP8ModeScore: %ld\n" + " VP8SegmentInfo: %ld\n" + " VP8EncProba: %ld\n" + " LFStats: %ld\n", + sizeof(VP8EncIterator), sizeof(VP8ModeScore), + sizeof(VP8SegmentInfo), sizeof(VP8EncProba), + 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*)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->mb_info_ = (VP8MBInfo*)mem; + mem += info_size; + enc->preds_ = ((uint8_t*)mem) + 1 + enc->preds_w_; + mem += preds_size; + enc->nz_ = 1 + (uint32_t*)WEBP_ALIGN(mem); + mem += nz_size; + enc->lf_stats_ = lf_stats_size ? (LFStats*)WEBP_ALIGN(mem) : NULL; + mem += lf_stats_size; + + // top samples (all 16-aligned) + mem = (uint8_t*)WEBP_ALIGN(mem); + enc->y_top_ = (uint8_t*)mem; + enc->uv_top_ = enc->y_top_ + top_stride; + mem += 2 * top_stride; + assert(mem <= (uint8_t*)enc + size); + + 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); + VP8EncDspCostInit(); + VP8EncInitAlpha(enc); + + // 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 int DeleteVP8Encoder(VP8Encoder* enc) { + int ok = 1; + if (enc != NULL) { + ok = VP8EncDeleteAlpha(enc); + VP8TBufferClear(&enc->tokens_); + WebPSafeFree(enc); + } + return ok; +} + +//------------------------------------------------------------------------------ + +static double GetPSNR(uint64_t err, uint64_t size) { + return (err > 0 && size > 0) ? 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 = 0; + + 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 (!config->exact) { + WebPCleanupTransparentArea(pic); + } + + 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 { + 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); + + // 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); + } + ok &= DeleteVP8Encoder(enc); // must always be called, even if !ok + } else { + // Make sure we have ARGB samples. + if (pic->argb == NULL && !WebPPictureYUVAToARGB(pic)) { + return 0; + } + + if (!config->exact) { + WebPCleanupTransparentAreaLossless(pic); + } + + ok = VP8LEncodeImage(config, pic); // Sets pic->error in case of problem. + } + + return ok; +} diff --git a/thirdparty/libwebp/mux/anim_encode.c b/thirdparty/libwebp/mux/anim_encode.c new file mode 100644 index 0000000000..53e2906a82 --- /dev/null +++ b/thirdparty/libwebp/mux/anim_encode.c @@ -0,0 +1,1534 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// AnimEncoder implementation. +// + +#include <assert.h> +#include <limits.h> +#include <math.h> // for pow() +#include <stdio.h> +#include <stdlib.h> // for abs() + +#include "../utils/utils.h" +#include "../webp/decode.h" +#include "../webp/encode.h" +#include "../webp/format_constants.h" +#include "../webp/mux.h" + +#if defined(_MSC_VER) && _MSC_VER < 1900 +#define snprintf _snprintf +#endif + +#define ERROR_STR_MAX_LENGTH 100 + +//------------------------------------------------------------------------------ +// Internal structs. + +// Stores frame rectangle dimensions. +typedef struct { + int x_offset_, y_offset_, width_, height_; +} FrameRect; + +// Used to store two candidates of encoded data for an animation frame. One of +// the two will be chosen later. +typedef struct { + WebPMuxFrameInfo sub_frame_; // Encoded frame rectangle. + WebPMuxFrameInfo key_frame_; // Encoded frame if it is a key-frame. + int is_key_frame_; // True if 'key_frame' has been chosen. +} EncodedFrame; + +struct WebPAnimEncoder { + const int canvas_width_; // Canvas width. + const int canvas_height_; // Canvas height. + const WebPAnimEncoderOptions options_; // Global encoding options. + + FrameRect prev_rect_; // Previous WebP frame rectangle. + WebPConfig last_config_; // Cached in case a re-encode is needed. + WebPConfig last_config_reversed_; // If 'last_config_' uses lossless, then + // this config uses lossy and vice versa; + // only valid if 'options_.allow_mixed' + // is true. + + WebPPicture* curr_canvas_; // Only pointer; we don't own memory. + + // Canvas buffers. + WebPPicture curr_canvas_copy_; // Possibly modified current canvas. + int curr_canvas_copy_modified_; // True if pixels in 'curr_canvas_copy_' + // differ from those in 'curr_canvas_'. + + WebPPicture prev_canvas_; // Previous canvas. + WebPPicture prev_canvas_disposed_; // Previous canvas disposed to background. + + // Encoded data. + EncodedFrame* encoded_frames_; // Array of encoded frames. + size_t size_; // Number of allocated frames. + size_t start_; // Frame start index. + size_t count_; // Number of valid frames. + size_t flush_count_; // If >0, 'flush_count' frames starting from + // 'start' are ready to be added to mux. + + // key-frame related. + int64_t best_delta_; // min(canvas size - frame size) over the frames. + // Can be negative in certain cases due to + // transparent pixels in a frame. + int keyframe_; // Index of selected key-frame relative to 'start_'. + int count_since_key_frame_; // Frames seen since the last key-frame. + + int first_timestamp_; // Timestamp of the first frame. + int prev_timestamp_; // Timestamp of the last added frame. + int prev_candidate_undecided_; // True if it's not yet decided if previous + // frame would be a sub-frame or a key-frame. + + // Misc. + int is_first_frame_; // True if first frame is yet to be added/being added. + int got_null_frame_; // True if WebPAnimEncoderAdd() has already been called + // with a NULL frame. + + size_t in_frame_count_; // Number of input frames processed so far. + size_t out_frame_count_; // Number of frames added to mux so far. This may be + // different from 'in_frame_count_' due to merging. + + WebPMux* mux_; // Muxer to assemble the WebP bitstream. + char error_str_[ERROR_STR_MAX_LENGTH]; // Error string. Empty if no error. +}; + +// ----------------------------------------------------------------------------- +// Life of WebPAnimEncoder object. + +#define DELTA_INFINITY (1ULL << 32) +#define KEYFRAME_NONE (-1) + +// Reset the counters in the WebPAnimEncoder. +static void ResetCounters(WebPAnimEncoder* const enc) { + enc->start_ = 0; + enc->count_ = 0; + enc->flush_count_ = 0; + enc->best_delta_ = DELTA_INFINITY; + enc->keyframe_ = KEYFRAME_NONE; +} + +static void DisableKeyframes(WebPAnimEncoderOptions* const enc_options) { + enc_options->kmax = INT_MAX; + enc_options->kmin = enc_options->kmax - 1; +} + +#define MAX_CACHED_FRAMES 30 + +static void SanitizeEncoderOptions(WebPAnimEncoderOptions* const enc_options) { + int print_warning = enc_options->verbose; + + if (enc_options->minimize_size) { + DisableKeyframes(enc_options); + } + + if (enc_options->kmin <= 0) { + DisableKeyframes(enc_options); + print_warning = 0; + } + if (enc_options->kmax <= 0) { // All frames will be key-frames. + enc_options->kmin = 0; + enc_options->kmax = 0; + return; + } + + if (enc_options->kmin >= enc_options->kmax) { + enc_options->kmin = enc_options->kmax - 1; + if (print_warning) { + fprintf(stderr, "WARNING: Setting kmin = %d, so that kmin < kmax.\n", + enc_options->kmin); + } + } else { + const int kmin_limit = enc_options->kmax / 2 + 1; + if (enc_options->kmin < kmin_limit && kmin_limit < enc_options->kmax) { + // This ensures that enc.keyframe + kmin >= kmax is always true. So, we + // can flush all the frames in the 'count_since_key_frame == kmax' case. + enc_options->kmin = kmin_limit; + if (print_warning) { + fprintf(stderr, + "WARNING: Setting kmin = %d, so that kmin >= kmax / 2 + 1.\n", + enc_options->kmin); + } + } + } + // Limit the max number of frames that are allocated. + if (enc_options->kmax - enc_options->kmin > MAX_CACHED_FRAMES) { + enc_options->kmin = enc_options->kmax - MAX_CACHED_FRAMES; + if (print_warning) { + fprintf(stderr, + "WARNING: Setting kmin = %d, so that kmax - kmin <= %d.\n", + enc_options->kmin, MAX_CACHED_FRAMES); + } + } + assert(enc_options->kmin < enc_options->kmax); +} + +#undef MAX_CACHED_FRAMES + +static void DefaultEncoderOptions(WebPAnimEncoderOptions* const enc_options) { + enc_options->anim_params.loop_count = 0; + enc_options->anim_params.bgcolor = 0xffffffff; // White. + enc_options->minimize_size = 0; + DisableKeyframes(enc_options); + enc_options->allow_mixed = 0; + enc_options->verbose = 0; +} + +int WebPAnimEncoderOptionsInitInternal(WebPAnimEncoderOptions* enc_options, + int abi_version) { + if (enc_options == NULL || + WEBP_ABI_IS_INCOMPATIBLE(abi_version, WEBP_MUX_ABI_VERSION)) { + return 0; + } + DefaultEncoderOptions(enc_options); + return 1; +} + +// This starting value is more fit to WebPCleanupTransparentAreaLossless(). +#define TRANSPARENT_COLOR 0x00000000 + +static void ClearRectangle(WebPPicture* const picture, + int left, int top, int width, int height) { + int j; + for (j = top; j < top + height; ++j) { + uint32_t* const dst = picture->argb + j * picture->argb_stride; + int i; + for (i = left; i < left + width; ++i) { + dst[i] = TRANSPARENT_COLOR; + } + } +} + +static void WebPUtilClearPic(WebPPicture* const picture, + const FrameRect* const rect) { + if (rect != NULL) { + ClearRectangle(picture, rect->x_offset_, rect->y_offset_, + rect->width_, rect->height_); + } else { + ClearRectangle(picture, 0, 0, picture->width, picture->height); + } +} + +static void MarkNoError(WebPAnimEncoder* const enc) { + enc->error_str_[0] = '\0'; // Empty string. +} + +static void MarkError(WebPAnimEncoder* const enc, const char* str) { + if (snprintf(enc->error_str_, ERROR_STR_MAX_LENGTH, "%s.", str) < 0) { + assert(0); // FIX ME! + } +} + +static void MarkError2(WebPAnimEncoder* const enc, + const char* str, int error_code) { + if (snprintf(enc->error_str_, ERROR_STR_MAX_LENGTH, "%s: %d.", str, + error_code) < 0) { + assert(0); // FIX ME! + } +} + +WebPAnimEncoder* WebPAnimEncoderNewInternal( + int width, int height, const WebPAnimEncoderOptions* enc_options, + int abi_version) { + WebPAnimEncoder* enc; + + if (WEBP_ABI_IS_INCOMPATIBLE(abi_version, WEBP_MUX_ABI_VERSION)) { + return NULL; + } + if (width <= 0 || height <= 0 || + (width * (uint64_t)height) >= MAX_IMAGE_AREA) { + return NULL; + } + + enc = (WebPAnimEncoder*)WebPSafeCalloc(1, sizeof(*enc)); + if (enc == NULL) return NULL; + // sanity inits, so we can call WebPAnimEncoderDelete(): + enc->encoded_frames_ = NULL; + enc->mux_ = NULL; + MarkNoError(enc); + + // Dimensions and options. + *(int*)&enc->canvas_width_ = width; + *(int*)&enc->canvas_height_ = height; + if (enc_options != NULL) { + *(WebPAnimEncoderOptions*)&enc->options_ = *enc_options; + SanitizeEncoderOptions((WebPAnimEncoderOptions*)&enc->options_); + } else { + DefaultEncoderOptions((WebPAnimEncoderOptions*)&enc->options_); + } + + // Canvas buffers. + if (!WebPPictureInit(&enc->curr_canvas_copy_) || + !WebPPictureInit(&enc->prev_canvas_) || + !WebPPictureInit(&enc->prev_canvas_disposed_)) { + goto Err; + } + enc->curr_canvas_copy_.width = width; + enc->curr_canvas_copy_.height = height; + enc->curr_canvas_copy_.use_argb = 1; + if (!WebPPictureAlloc(&enc->curr_canvas_copy_) || + !WebPPictureCopy(&enc->curr_canvas_copy_, &enc->prev_canvas_) || + !WebPPictureCopy(&enc->curr_canvas_copy_, &enc->prev_canvas_disposed_)) { + goto Err; + } + WebPUtilClearPic(&enc->prev_canvas_, NULL); + enc->curr_canvas_copy_modified_ = 1; + + // Encoded frames. + ResetCounters(enc); + // Note: one extra storage is for the previous frame. + enc->size_ = enc->options_.kmax - enc->options_.kmin + 1; + // We need space for at least 2 frames. But when kmin, kmax are both zero, + // enc->size_ will be 1. So we handle that special case below. + if (enc->size_ < 2) enc->size_ = 2; + enc->encoded_frames_ = + (EncodedFrame*)WebPSafeCalloc(enc->size_, sizeof(*enc->encoded_frames_)); + if (enc->encoded_frames_ == NULL) goto Err; + + enc->mux_ = WebPMuxNew(); + if (enc->mux_ == NULL) goto Err; + + enc->count_since_key_frame_ = 0; + enc->first_timestamp_ = 0; + enc->prev_timestamp_ = 0; + enc->prev_candidate_undecided_ = 0; + enc->is_first_frame_ = 1; + enc->got_null_frame_ = 0; + + return enc; // All OK. + + Err: + WebPAnimEncoderDelete(enc); + return NULL; +} + +// Release the data contained by 'encoded_frame'. +static void FrameRelease(EncodedFrame* const encoded_frame) { + if (encoded_frame != NULL) { + WebPDataClear(&encoded_frame->sub_frame_.bitstream); + WebPDataClear(&encoded_frame->key_frame_.bitstream); + memset(encoded_frame, 0, sizeof(*encoded_frame)); + } +} + +void WebPAnimEncoderDelete(WebPAnimEncoder* enc) { + if (enc != NULL) { + WebPPictureFree(&enc->curr_canvas_copy_); + WebPPictureFree(&enc->prev_canvas_); + WebPPictureFree(&enc->prev_canvas_disposed_); + if (enc->encoded_frames_ != NULL) { + size_t i; + for (i = 0; i < enc->size_; ++i) { + FrameRelease(&enc->encoded_frames_[i]); + } + WebPSafeFree(enc->encoded_frames_); + } + WebPMuxDelete(enc->mux_); + WebPSafeFree(enc); + } +} + +// ----------------------------------------------------------------------------- +// Frame addition. + +// Returns cached frame at the given 'position'. +static EncodedFrame* GetFrame(const WebPAnimEncoder* const enc, + size_t position) { + assert(enc->start_ + position < enc->size_); + return &enc->encoded_frames_[enc->start_ + position]; +} + +typedef int (*ComparePixelsFunc)(const uint32_t*, int, const uint32_t*, int, + int, int); + +// Returns true if 'length' number of pixels in 'src' and 'dst' are equal, +// assuming the given step sizes between pixels. +// 'max_allowed_diff' is unused and only there to allow function pointer use. +static WEBP_INLINE int ComparePixelsLossless(const uint32_t* src, int src_step, + const uint32_t* dst, int dst_step, + int length, int max_allowed_diff) { + (void)max_allowed_diff; + assert(length > 0); + while (length-- > 0) { + if (*src != *dst) { + return 0; + } + src += src_step; + dst += dst_step; + } + return 1; +} + +// Helper to check if each channel in 'src' and 'dst' is at most off by +// 'max_allowed_diff'. +static WEBP_INLINE int PixelsAreSimilar(uint32_t src, uint32_t dst, + int max_allowed_diff) { + const int src_a = (src >> 24) & 0xff; + const int src_r = (src >> 16) & 0xff; + const int src_g = (src >> 8) & 0xff; + const int src_b = (src >> 0) & 0xff; + const int dst_a = (dst >> 24) & 0xff; + const int dst_r = (dst >> 16) & 0xff; + const int dst_g = (dst >> 8) & 0xff; + const int dst_b = (dst >> 0) & 0xff; + + return (abs(src_r * src_a - dst_r * dst_a) <= (max_allowed_diff * 255)) && + (abs(src_g * src_a - dst_g * dst_a) <= (max_allowed_diff * 255)) && + (abs(src_b * src_a - dst_b * dst_a) <= (max_allowed_diff * 255)) && + (abs(src_a - dst_a) <= max_allowed_diff); +} + +// Returns true if 'length' number of pixels in 'src' and 'dst' are within an +// error bound, assuming the given step sizes between pixels. +static WEBP_INLINE int ComparePixelsLossy(const uint32_t* src, int src_step, + const uint32_t* dst, int dst_step, + int length, int max_allowed_diff) { + assert(length > 0); + while (length-- > 0) { + if (!PixelsAreSimilar(*src, *dst, max_allowed_diff)) { + return 0; + } + src += src_step; + dst += dst_step; + } + return 1; +} + +static int IsEmptyRect(const FrameRect* const rect) { + return (rect->width_ == 0) || (rect->height_ == 0); +} + +static int QualityToMaxDiff(float quality) { + const double val = pow(quality / 100., 0.5); + const double max_diff = 31 * (1 - val) + 1 * val; + return (int)(max_diff + 0.5); +} + +// Assumes that an initial valid guess of change rectangle 'rect' is passed. +static void MinimizeChangeRectangle(const WebPPicture* const src, + const WebPPicture* const dst, + FrameRect* const rect, + int is_lossless, float quality) { + int i, j; + const ComparePixelsFunc compare_pixels = + is_lossless ? ComparePixelsLossless : ComparePixelsLossy; + const int max_allowed_diff_lossy = QualityToMaxDiff(quality); + const int max_allowed_diff = is_lossless ? 0 : max_allowed_diff_lossy; + + // Sanity checks. + assert(src->width == dst->width && src->height == dst->height); + assert(rect->x_offset_ + rect->width_ <= dst->width); + assert(rect->y_offset_ + rect->height_ <= dst->height); + + // Left boundary. + for (i = rect->x_offset_; i < rect->x_offset_ + rect->width_; ++i) { + const uint32_t* const src_argb = + &src->argb[rect->y_offset_ * src->argb_stride + i]; + const uint32_t* const dst_argb = + &dst->argb[rect->y_offset_ * dst->argb_stride + i]; + if (compare_pixels(src_argb, src->argb_stride, dst_argb, dst->argb_stride, + rect->height_, max_allowed_diff)) { + --rect->width_; // Redundant column. + ++rect->x_offset_; + } else { + break; + } + } + if (rect->width_ == 0) goto NoChange; + + // Right boundary. + for (i = rect->x_offset_ + rect->width_ - 1; i >= rect->x_offset_; --i) { + const uint32_t* const src_argb = + &src->argb[rect->y_offset_ * src->argb_stride + i]; + const uint32_t* const dst_argb = + &dst->argb[rect->y_offset_ * dst->argb_stride + i]; + if (compare_pixels(src_argb, src->argb_stride, dst_argb, dst->argb_stride, + rect->height_, max_allowed_diff)) { + --rect->width_; // Redundant column. + } else { + break; + } + } + if (rect->width_ == 0) goto NoChange; + + // Top boundary. + for (j = rect->y_offset_; j < rect->y_offset_ + rect->height_; ++j) { + const uint32_t* const src_argb = + &src->argb[j * src->argb_stride + rect->x_offset_]; + const uint32_t* const dst_argb = + &dst->argb[j * dst->argb_stride + rect->x_offset_]; + if (compare_pixels(src_argb, 1, dst_argb, 1, rect->width_, + max_allowed_diff)) { + --rect->height_; // Redundant row. + ++rect->y_offset_; + } else { + break; + } + } + if (rect->height_ == 0) goto NoChange; + + // Bottom boundary. + for (j = rect->y_offset_ + rect->height_ - 1; j >= rect->y_offset_; --j) { + const uint32_t* const src_argb = + &src->argb[j * src->argb_stride + rect->x_offset_]; + const uint32_t* const dst_argb = + &dst->argb[j * dst->argb_stride + rect->x_offset_]; + if (compare_pixels(src_argb, 1, dst_argb, 1, rect->width_, + max_allowed_diff)) { + --rect->height_; // Redundant row. + } else { + break; + } + } + if (rect->height_ == 0) goto NoChange; + + if (IsEmptyRect(rect)) { + NoChange: + rect->x_offset_ = 0; + rect->y_offset_ = 0; + rect->width_ = 0; + rect->height_ = 0; + } +} + +// Snap rectangle to even offsets (and adjust dimensions if needed). +static WEBP_INLINE void SnapToEvenOffsets(FrameRect* const rect) { + rect->width_ += (rect->x_offset_ & 1); + rect->height_ += (rect->y_offset_ & 1); + rect->x_offset_ &= ~1; + rect->y_offset_ &= ~1; +} + +typedef struct { + int should_try_; // Should try this set of parameters. + int empty_rect_allowed_; // Frame with empty rectangle can be skipped. + FrameRect rect_ll_; // Frame rectangle for lossless compression. + WebPPicture sub_frame_ll_; // Sub-frame pic for lossless compression. + FrameRect rect_lossy_; // Frame rectangle for lossy compression. + // Could be smaller than rect_ll_ as pixels + // with small diffs can be ignored. + WebPPicture sub_frame_lossy_; // Sub-frame pic for lossless compression. +} SubFrameParams; + +static int SubFrameParamsInit(SubFrameParams* const params, + int should_try, int empty_rect_allowed) { + params->should_try_ = should_try; + params->empty_rect_allowed_ = empty_rect_allowed; + if (!WebPPictureInit(¶ms->sub_frame_ll_) || + !WebPPictureInit(¶ms->sub_frame_lossy_)) { + return 0; + } + return 1; +} + +static void SubFrameParamsFree(SubFrameParams* const params) { + WebPPictureFree(¶ms->sub_frame_ll_); + WebPPictureFree(¶ms->sub_frame_lossy_); +} + +// Given previous and current canvas, picks the optimal rectangle for the +// current frame based on 'is_lossless' and other parameters. Assumes that the +// initial guess 'rect' is valid. +static int GetSubRect(const WebPPicture* const prev_canvas, + const WebPPicture* const curr_canvas, int is_key_frame, + int is_first_frame, int empty_rect_allowed, + int is_lossless, float quality, FrameRect* const rect, + WebPPicture* const sub_frame) { + if (!is_key_frame || is_first_frame) { // Optimize frame rectangle. + // Note: This behaves as expected for first frame, as 'prev_canvas' is + // initialized to a fully transparent canvas in the beginning. + MinimizeChangeRectangle(prev_canvas, curr_canvas, rect, + is_lossless, quality); + } + + if (IsEmptyRect(rect)) { + if (empty_rect_allowed) { // No need to get 'sub_frame'. + return 1; + } else { // Force a 1x1 rectangle. + rect->width_ = 1; + rect->height_ = 1; + assert(rect->x_offset_ == 0); + assert(rect->y_offset_ == 0); + } + } + + SnapToEvenOffsets(rect); + return WebPPictureView(curr_canvas, rect->x_offset_, rect->y_offset_, + rect->width_, rect->height_, sub_frame); +} + +// Picks optimal frame rectangle for both lossless and lossy compression. The +// initial guess for frame rectangles will be the full canvas. +static int GetSubRects(const WebPPicture* const prev_canvas, + const WebPPicture* const curr_canvas, int is_key_frame, + int is_first_frame, float quality, + SubFrameParams* const params) { + // Lossless frame rectangle. + params->rect_ll_.x_offset_ = 0; + params->rect_ll_.y_offset_ = 0; + params->rect_ll_.width_ = curr_canvas->width; + params->rect_ll_.height_ = curr_canvas->height; + if (!GetSubRect(prev_canvas, curr_canvas, is_key_frame, is_first_frame, + params->empty_rect_allowed_, 1, quality, + ¶ms->rect_ll_, ¶ms->sub_frame_ll_)) { + return 0; + } + // Lossy frame rectangle. + params->rect_lossy_ = params->rect_ll_; // seed with lossless rect. + return GetSubRect(prev_canvas, curr_canvas, is_key_frame, is_first_frame, + params->empty_rect_allowed_, 0, quality, + ¶ms->rect_lossy_, ¶ms->sub_frame_lossy_); +} + +static void DisposeFrameRectangle(int dispose_method, + const FrameRect* const rect, + WebPPicture* const curr_canvas) { + assert(rect != NULL); + if (dispose_method == WEBP_MUX_DISPOSE_BACKGROUND) { + WebPUtilClearPic(curr_canvas, rect); + } +} + +static uint32_t RectArea(const FrameRect* const rect) { + return (uint32_t)rect->width_ * rect->height_; +} + +static int IsLosslessBlendingPossible(const WebPPicture* const src, + const WebPPicture* const dst, + const FrameRect* const rect) { + int i, j; + assert(src->width == dst->width && src->height == dst->height); + assert(rect->x_offset_ + rect->width_ <= dst->width); + assert(rect->y_offset_ + rect->height_ <= dst->height); + for (j = rect->y_offset_; j < rect->y_offset_ + rect->height_; ++j) { + for (i = rect->x_offset_; i < rect->x_offset_ + rect->width_; ++i) { + const uint32_t src_pixel = src->argb[j * src->argb_stride + i]; + const uint32_t dst_pixel = dst->argb[j * dst->argb_stride + i]; + const uint32_t dst_alpha = dst_pixel >> 24; + if (dst_alpha != 0xff && src_pixel != dst_pixel) { + // In this case, if we use blending, we can't attain the desired + // 'dst_pixel' value for this pixel. So, blending is not possible. + return 0; + } + } + } + return 1; +} + +static int IsLossyBlendingPossible(const WebPPicture* const src, + const WebPPicture* const dst, + const FrameRect* const rect, + float quality) { + const int max_allowed_diff_lossy = QualityToMaxDiff(quality); + int i, j; + assert(src->width == dst->width && src->height == dst->height); + assert(rect->x_offset_ + rect->width_ <= dst->width); + assert(rect->y_offset_ + rect->height_ <= dst->height); + for (j = rect->y_offset_; j < rect->y_offset_ + rect->height_; ++j) { + for (i = rect->x_offset_; i < rect->x_offset_ + rect->width_; ++i) { + const uint32_t src_pixel = src->argb[j * src->argb_stride + i]; + const uint32_t dst_pixel = dst->argb[j * dst->argb_stride + i]; + const uint32_t dst_alpha = dst_pixel >> 24; + if (dst_alpha != 0xff && + !PixelsAreSimilar(src_pixel, dst_pixel, max_allowed_diff_lossy)) { + // In this case, if we use blending, we can't attain the desired + // 'dst_pixel' value for this pixel. So, blending is not possible. + return 0; + } + } + } + return 1; +} + +// For pixels in 'rect', replace those pixels in 'dst' that are same as 'src' by +// transparent pixels. +// Returns true if at least one pixel gets modified. +static int IncreaseTransparency(const WebPPicture* const src, + const FrameRect* const rect, + WebPPicture* const dst) { + int i, j; + int modified = 0; + assert(src != NULL && dst != NULL && rect != NULL); + assert(src->width == dst->width && src->height == dst->height); + for (j = rect->y_offset_; j < rect->y_offset_ + rect->height_; ++j) { + const uint32_t* const psrc = src->argb + j * src->argb_stride; + uint32_t* const pdst = dst->argb + j * dst->argb_stride; + for (i = rect->x_offset_; i < rect->x_offset_ + rect->width_; ++i) { + if (psrc[i] == pdst[i] && pdst[i] != TRANSPARENT_COLOR) { + pdst[i] = TRANSPARENT_COLOR; + modified = 1; + } + } + } + return modified; +} + +#undef TRANSPARENT_COLOR + +// Replace similar blocks of pixels by a 'see-through' transparent block +// with uniform average color. +// Assumes lossy compression is being used. +// Returns true if at least one pixel gets modified. +static int FlattenSimilarBlocks(const WebPPicture* const src, + const FrameRect* const rect, + WebPPicture* const dst, float quality) { + const int max_allowed_diff_lossy = QualityToMaxDiff(quality); + int i, j; + int modified = 0; + const int block_size = 8; + const int y_start = (rect->y_offset_ + block_size) & ~(block_size - 1); + const int y_end = (rect->y_offset_ + rect->height_) & ~(block_size - 1); + const int x_start = (rect->x_offset_ + block_size) & ~(block_size - 1); + const int x_end = (rect->x_offset_ + rect->width_) & ~(block_size - 1); + assert(src != NULL && dst != NULL && rect != NULL); + assert(src->width == dst->width && src->height == dst->height); + assert((block_size & (block_size - 1)) == 0); // must be a power of 2 + // Iterate over each block and count similar pixels. + for (j = y_start; j < y_end; j += block_size) { + for (i = x_start; i < x_end; i += block_size) { + int cnt = 0; + int avg_r = 0, avg_g = 0, avg_b = 0; + int x, y; + const uint32_t* const psrc = src->argb + j * src->argb_stride + i; + uint32_t* const pdst = dst->argb + j * dst->argb_stride + i; + for (y = 0; y < block_size; ++y) { + for (x = 0; x < block_size; ++x) { + const uint32_t src_pixel = psrc[x + y * src->argb_stride]; + const int alpha = src_pixel >> 24; + if (alpha == 0xff && + PixelsAreSimilar(src_pixel, pdst[x + y * dst->argb_stride], + max_allowed_diff_lossy)) { + ++cnt; + avg_r += (src_pixel >> 16) & 0xff; + avg_g += (src_pixel >> 8) & 0xff; + avg_b += (src_pixel >> 0) & 0xff; + } + } + } + // If we have a fully similar block, we replace it with an + // average transparent block. This compresses better in lossy mode. + if (cnt == block_size * block_size) { + const uint32_t color = (0x00 << 24) | + ((avg_r / cnt) << 16) | + ((avg_g / cnt) << 8) | + ((avg_b / cnt) << 0); + for (y = 0; y < block_size; ++y) { + for (x = 0; x < block_size; ++x) { + pdst[x + y * dst->argb_stride] = color; + } + } + modified = 1; + } + } + } + return modified; +} + +static int EncodeFrame(const WebPConfig* const config, WebPPicture* const pic, + WebPMemoryWriter* const memory) { + pic->use_argb = 1; + pic->writer = WebPMemoryWrite; + pic->custom_ptr = memory; + if (!WebPEncode(config, pic)) { + return 0; + } + return 1; +} + +// Struct representing a candidate encoded frame including its metadata. +typedef struct { + WebPMemoryWriter mem_; + WebPMuxFrameInfo info_; + FrameRect rect_; + int evaluate_; // True if this candidate should be evaluated. +} Candidate; + +// Generates a candidate encoded frame given a picture and metadata. +static WebPEncodingError EncodeCandidate(WebPPicture* const sub_frame, + const FrameRect* const rect, + const WebPConfig* const encoder_config, + int use_blending, + Candidate* const candidate) { + WebPConfig config = *encoder_config; + WebPEncodingError error_code = VP8_ENC_OK; + assert(candidate != NULL); + memset(candidate, 0, sizeof(*candidate)); + + // Set frame rect and info. + candidate->rect_ = *rect; + candidate->info_.id = WEBP_CHUNK_ANMF; + candidate->info_.x_offset = rect->x_offset_; + candidate->info_.y_offset = rect->y_offset_; + candidate->info_.dispose_method = WEBP_MUX_DISPOSE_NONE; // Set later. + candidate->info_.blend_method = + use_blending ? WEBP_MUX_BLEND : WEBP_MUX_NO_BLEND; + candidate->info_.duration = 0; // Set in next call to WebPAnimEncoderAdd(). + + // Encode picture. + WebPMemoryWriterInit(&candidate->mem_); + + if (!config.lossless && use_blending) { + // Disable filtering to avoid blockiness in reconstructed frames at the + // time of decoding. + config.autofilter = 0; + config.filter_strength = 0; + } + if (!EncodeFrame(&config, sub_frame, &candidate->mem_)) { + error_code = sub_frame->error_code; + goto Err; + } + + candidate->evaluate_ = 1; + return error_code; + + Err: + WebPMemoryWriterClear(&candidate->mem_); + return error_code; +} + +static void CopyCurrentCanvas(WebPAnimEncoder* const enc) { + if (enc->curr_canvas_copy_modified_) { + WebPCopyPixels(enc->curr_canvas_, &enc->curr_canvas_copy_); + enc->curr_canvas_copy_.progress_hook = enc->curr_canvas_->progress_hook; + enc->curr_canvas_copy_.user_data = enc->curr_canvas_->user_data; + enc->curr_canvas_copy_modified_ = 0; + } +} + +enum { + LL_DISP_NONE = 0, + LL_DISP_BG, + LOSSY_DISP_NONE, + LOSSY_DISP_BG, + CANDIDATE_COUNT +}; + +#define MIN_COLORS_LOSSY 31 // Don't try lossy below this threshold. +#define MAX_COLORS_LOSSLESS 194 // Don't try lossless above this threshold. + +// Generates candidates for a given dispose method given pre-filled sub-frame +// 'params'. +static WebPEncodingError GenerateCandidates( + WebPAnimEncoder* const enc, Candidate candidates[CANDIDATE_COUNT], + WebPMuxAnimDispose dispose_method, int is_lossless, int is_key_frame, + SubFrameParams* const params, + const WebPConfig* const config_ll, const WebPConfig* const config_lossy) { + WebPEncodingError error_code = VP8_ENC_OK; + const int is_dispose_none = (dispose_method == WEBP_MUX_DISPOSE_NONE); + Candidate* const candidate_ll = + is_dispose_none ? &candidates[LL_DISP_NONE] : &candidates[LL_DISP_BG]; + Candidate* const candidate_lossy = is_dispose_none + ? &candidates[LOSSY_DISP_NONE] + : &candidates[LOSSY_DISP_BG]; + WebPPicture* const curr_canvas = &enc->curr_canvas_copy_; + const WebPPicture* const prev_canvas = + is_dispose_none ? &enc->prev_canvas_ : &enc->prev_canvas_disposed_; + int use_blending_ll; + int use_blending_lossy; + + CopyCurrentCanvas(enc); + use_blending_ll = + !is_key_frame && + IsLosslessBlendingPossible(prev_canvas, curr_canvas, ¶ms->rect_ll_); + use_blending_lossy = + !is_key_frame && + IsLossyBlendingPossible(prev_canvas, curr_canvas, ¶ms->rect_lossy_, + config_lossy->quality); + + // Pick candidates to be tried. + if (!enc->options_.allow_mixed) { + candidate_ll->evaluate_ = is_lossless; + candidate_lossy->evaluate_ = !is_lossless; + } else { // Use a heuristic for trying lossless and/or lossy compression. + const int num_colors = WebPGetColorPalette(¶ms->sub_frame_ll_, NULL); + candidate_ll->evaluate_ = (num_colors < MAX_COLORS_LOSSLESS); + candidate_lossy->evaluate_ = (num_colors >= MIN_COLORS_LOSSY); + } + + // Generate candidates. + if (candidate_ll->evaluate_) { + CopyCurrentCanvas(enc); + if (use_blending_ll) { + enc->curr_canvas_copy_modified_ = + IncreaseTransparency(prev_canvas, ¶ms->rect_ll_, curr_canvas); + } + error_code = EncodeCandidate(¶ms->sub_frame_ll_, ¶ms->rect_ll_, + config_ll, use_blending_ll, candidate_ll); + if (error_code != VP8_ENC_OK) return error_code; + } + if (candidate_lossy->evaluate_) { + CopyCurrentCanvas(enc); + if (use_blending_lossy) { + enc->curr_canvas_copy_modified_ = + FlattenSimilarBlocks(prev_canvas, ¶ms->rect_lossy_, curr_canvas, + config_lossy->quality); + } + error_code = + EncodeCandidate(¶ms->sub_frame_lossy_, ¶ms->rect_lossy_, + config_lossy, use_blending_lossy, candidate_lossy); + if (error_code != VP8_ENC_OK) return error_code; + enc->curr_canvas_copy_modified_ = 1; + } + return error_code; +} + +#undef MIN_COLORS_LOSSY +#undef MAX_COLORS_LOSSLESS + +static void GetEncodedData(const WebPMemoryWriter* const memory, + WebPData* const encoded_data) { + encoded_data->bytes = memory->mem; + encoded_data->size = memory->size; +} + +// Sets dispose method of the previous frame to be 'dispose_method'. +static void SetPreviousDisposeMethod(WebPAnimEncoder* const enc, + WebPMuxAnimDispose dispose_method) { + const size_t position = enc->count_ - 2; + EncodedFrame* const prev_enc_frame = GetFrame(enc, position); + assert(enc->count_ >= 2); // As current and previous frames are in enc. + + if (enc->prev_candidate_undecided_) { + assert(dispose_method == WEBP_MUX_DISPOSE_NONE); + prev_enc_frame->sub_frame_.dispose_method = dispose_method; + prev_enc_frame->key_frame_.dispose_method = dispose_method; + } else { + WebPMuxFrameInfo* const prev_info = prev_enc_frame->is_key_frame_ + ? &prev_enc_frame->key_frame_ + : &prev_enc_frame->sub_frame_; + prev_info->dispose_method = dispose_method; + } +} + +static int IncreasePreviousDuration(WebPAnimEncoder* const enc, int duration) { + const size_t position = enc->count_ - 1; + EncodedFrame* const prev_enc_frame = GetFrame(enc, position); + int new_duration; + + assert(enc->count_ >= 1); + assert(prev_enc_frame->sub_frame_.duration == + prev_enc_frame->key_frame_.duration); + assert(prev_enc_frame->sub_frame_.duration == + (prev_enc_frame->sub_frame_.duration & (MAX_DURATION - 1))); + assert(duration == (duration & (MAX_DURATION - 1))); + + new_duration = prev_enc_frame->sub_frame_.duration + duration; + if (new_duration >= MAX_DURATION) { // Special case. + // Separate out previous frame from earlier merged frames to avoid overflow. + // We add a 1x1 transparent frame for the previous frame, with blending on. + const FrameRect rect = { 0, 0, 1, 1 }; + const uint8_t lossless_1x1_bytes[] = { + 0x52, 0x49, 0x46, 0x46, 0x14, 0x00, 0x00, 0x00, 0x57, 0x45, 0x42, 0x50, + 0x56, 0x50, 0x38, 0x4c, 0x08, 0x00, 0x00, 0x00, 0x2f, 0x00, 0x00, 0x00, + 0x10, 0x88, 0x88, 0x08 + }; + const WebPData lossless_1x1 = { + lossless_1x1_bytes, sizeof(lossless_1x1_bytes) + }; + const uint8_t lossy_1x1_bytes[] = { + 0x52, 0x49, 0x46, 0x46, 0x40, 0x00, 0x00, 0x00, 0x57, 0x45, 0x42, 0x50, + 0x56, 0x50, 0x38, 0x58, 0x0a, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x41, 0x4c, 0x50, 0x48, 0x02, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x56, 0x50, 0x38, 0x20, 0x18, 0x00, 0x00, 0x00, + 0x30, 0x01, 0x00, 0x9d, 0x01, 0x2a, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, + 0x34, 0x25, 0xa4, 0x00, 0x03, 0x70, 0x00, 0xfe, 0xfb, 0xfd, 0x50, 0x00 + }; + const WebPData lossy_1x1 = { lossy_1x1_bytes, sizeof(lossy_1x1_bytes) }; + const int can_use_lossless = + (enc->last_config_.lossless || enc->options_.allow_mixed); + EncodedFrame* const curr_enc_frame = GetFrame(enc, enc->count_); + curr_enc_frame->is_key_frame_ = 0; + curr_enc_frame->sub_frame_.id = WEBP_CHUNK_ANMF; + curr_enc_frame->sub_frame_.x_offset = 0; + curr_enc_frame->sub_frame_.y_offset = 0; + curr_enc_frame->sub_frame_.dispose_method = WEBP_MUX_DISPOSE_NONE; + curr_enc_frame->sub_frame_.blend_method = WEBP_MUX_BLEND; + curr_enc_frame->sub_frame_.duration = duration; + if (!WebPDataCopy(can_use_lossless ? &lossless_1x1 : &lossy_1x1, + &curr_enc_frame->sub_frame_.bitstream)) { + return 0; + } + ++enc->count_; + ++enc->count_since_key_frame_; + enc->flush_count_ = enc->count_ - 1; + enc->prev_candidate_undecided_ = 0; + enc->prev_rect_ = rect; + } else { // Regular case. + // Increase duration of the previous frame by 'duration'. + prev_enc_frame->sub_frame_.duration = new_duration; + prev_enc_frame->key_frame_.duration = new_duration; + } + return 1; +} + +// Pick the candidate encoded frame with smallest size and release other +// candidates. +// TODO(later): Perhaps a rough SSIM/PSNR produced by the encoder should +// also be a criteria, in addition to sizes. +static void PickBestCandidate(WebPAnimEncoder* const enc, + Candidate* const candidates, int is_key_frame, + EncodedFrame* const encoded_frame) { + int i; + int best_idx = -1; + size_t best_size = ~0; + for (i = 0; i < CANDIDATE_COUNT; ++i) { + if (candidates[i].evaluate_) { + const size_t candidate_size = candidates[i].mem_.size; + if (candidate_size < best_size) { + best_idx = i; + best_size = candidate_size; + } + } + } + assert(best_idx != -1); + for (i = 0; i < CANDIDATE_COUNT; ++i) { + if (candidates[i].evaluate_) { + if (i == best_idx) { + WebPMuxFrameInfo* const dst = is_key_frame + ? &encoded_frame->key_frame_ + : &encoded_frame->sub_frame_; + *dst = candidates[i].info_; + GetEncodedData(&candidates[i].mem_, &dst->bitstream); + if (!is_key_frame) { + // Note: Previous dispose method only matters for non-keyframes. + // Also, we don't want to modify previous dispose method that was + // selected when a non key-frame was assumed. + const WebPMuxAnimDispose prev_dispose_method = + (best_idx == LL_DISP_NONE || best_idx == LOSSY_DISP_NONE) + ? WEBP_MUX_DISPOSE_NONE + : WEBP_MUX_DISPOSE_BACKGROUND; + SetPreviousDisposeMethod(enc, prev_dispose_method); + } + enc->prev_rect_ = candidates[i].rect_; // save for next frame. + } else { + WebPMemoryWriterClear(&candidates[i].mem_); + candidates[i].evaluate_ = 0; + } + } + } +} + +// Depending on the configuration, tries different compressions +// (lossy/lossless), dispose methods, blending methods etc to encode the current +// frame and outputs the best one in 'encoded_frame'. +// 'frame_skipped' will be set to true if this frame should actually be skipped. +static WebPEncodingError SetFrame(WebPAnimEncoder* const enc, + const WebPConfig* const config, + int is_key_frame, + EncodedFrame* const encoded_frame, + int* const frame_skipped) { + int i; + WebPEncodingError error_code = VP8_ENC_OK; + const WebPPicture* const curr_canvas = &enc->curr_canvas_copy_; + const WebPPicture* const prev_canvas = &enc->prev_canvas_; + Candidate candidates[CANDIDATE_COUNT]; + const int is_lossless = config->lossless; + const int is_first_frame = enc->is_first_frame_; + + // First frame cannot be skipped as there is no 'previous frame' to merge it + // to. So, empty rectangle is not allowed for the first frame. + const int empty_rect_allowed_none = !is_first_frame; + + // Even if there is exact pixel match between 'disposed previous canvas' and + // 'current canvas', we can't skip current frame, as there may not be exact + // pixel match between 'previous canvas' and 'current canvas'. So, we don't + // allow empty rectangle in this case. + const int empty_rect_allowed_bg = 0; + + // If current frame is a key-frame, dispose method of previous frame doesn't + // matter, so we don't try dispose to background. + // Also, if key-frame insertion is on, and previous frame could be picked as + // either a sub-frame or a key-frame, then we can't be sure about what frame + // rectangle would be disposed. In that case too, we don't try dispose to + // background. + const int dispose_bg_possible = + !is_key_frame && !enc->prev_candidate_undecided_; + + SubFrameParams dispose_none_params; + SubFrameParams dispose_bg_params; + + WebPConfig config_ll = *config; + WebPConfig config_lossy = *config; + config_ll.lossless = 1; + config_lossy.lossless = 0; + enc->last_config_ = *config; + enc->last_config_reversed_ = config->lossless ? config_lossy : config_ll; + *frame_skipped = 0; + + if (!SubFrameParamsInit(&dispose_none_params, 1, empty_rect_allowed_none) || + !SubFrameParamsInit(&dispose_bg_params, 0, empty_rect_allowed_bg)) { + return VP8_ENC_ERROR_INVALID_CONFIGURATION; + } + + for (i = 0; i < CANDIDATE_COUNT; ++i) { + candidates[i].evaluate_ = 0; + } + + // Change-rectangle assuming previous frame was DISPOSE_NONE. + if (!GetSubRects(prev_canvas, curr_canvas, is_key_frame, is_first_frame, + config_lossy.quality, &dispose_none_params)) { + error_code = VP8_ENC_ERROR_INVALID_CONFIGURATION; + goto Err; + } + + if ((is_lossless && IsEmptyRect(&dispose_none_params.rect_ll_)) || + (!is_lossless && IsEmptyRect(&dispose_none_params.rect_lossy_))) { + // Don't encode the frame at all. Instead, the duration of the previous + // frame will be increased later. + assert(empty_rect_allowed_none); + *frame_skipped = 1; + goto End; + } + + if (dispose_bg_possible) { + // Change-rectangle assuming previous frame was DISPOSE_BACKGROUND. + WebPPicture* const prev_canvas_disposed = &enc->prev_canvas_disposed_; + WebPCopyPixels(prev_canvas, prev_canvas_disposed); + DisposeFrameRectangle(WEBP_MUX_DISPOSE_BACKGROUND, &enc->prev_rect_, + prev_canvas_disposed); + + if (!GetSubRects(prev_canvas_disposed, curr_canvas, is_key_frame, + is_first_frame, config_lossy.quality, + &dispose_bg_params)) { + error_code = VP8_ENC_ERROR_INVALID_CONFIGURATION; + goto Err; + } + assert(!IsEmptyRect(&dispose_bg_params.rect_ll_)); + assert(!IsEmptyRect(&dispose_bg_params.rect_lossy_)); + + if (enc->options_.minimize_size) { // Try both dispose methods. + dispose_bg_params.should_try_ = 1; + dispose_none_params.should_try_ = 1; + } else if ((is_lossless && + RectArea(&dispose_bg_params.rect_ll_) < + RectArea(&dispose_none_params.rect_ll_)) || + (!is_lossless && + RectArea(&dispose_bg_params.rect_lossy_) < + RectArea(&dispose_none_params.rect_lossy_))) { + dispose_bg_params.should_try_ = 1; // Pick DISPOSE_BACKGROUND. + dispose_none_params.should_try_ = 0; + } + } + + if (dispose_none_params.should_try_) { + error_code = GenerateCandidates( + enc, candidates, WEBP_MUX_DISPOSE_NONE, is_lossless, is_key_frame, + &dispose_none_params, &config_ll, &config_lossy); + if (error_code != VP8_ENC_OK) goto Err; + } + + if (dispose_bg_params.should_try_) { + assert(!enc->is_first_frame_); + assert(dispose_bg_possible); + error_code = GenerateCandidates( + enc, candidates, WEBP_MUX_DISPOSE_BACKGROUND, is_lossless, is_key_frame, + &dispose_bg_params, &config_ll, &config_lossy); + if (error_code != VP8_ENC_OK) goto Err; + } + + PickBestCandidate(enc, candidates, is_key_frame, encoded_frame); + + goto End; + + Err: + for (i = 0; i < CANDIDATE_COUNT; ++i) { + if (candidates[i].evaluate_) { + WebPMemoryWriterClear(&candidates[i].mem_); + } + } + + End: + SubFrameParamsFree(&dispose_none_params); + SubFrameParamsFree(&dispose_bg_params); + return error_code; +} + +// Calculate the penalty incurred if we encode given frame as a key frame +// instead of a sub-frame. +static int64_t KeyFramePenalty(const EncodedFrame* const encoded_frame) { + return ((int64_t)encoded_frame->key_frame_.bitstream.size - + encoded_frame->sub_frame_.bitstream.size); +} + +static int CacheFrame(WebPAnimEncoder* const enc, + const WebPConfig* const config) { + int ok = 0; + int frame_skipped = 0; + WebPEncodingError error_code = VP8_ENC_OK; + const size_t position = enc->count_; + EncodedFrame* const encoded_frame = GetFrame(enc, position); + + ++enc->count_; + + if (enc->is_first_frame_) { // Add this as a key-frame. + error_code = SetFrame(enc, config, 1, encoded_frame, &frame_skipped); + if (error_code != VP8_ENC_OK) goto End; + assert(frame_skipped == 0); // First frame can't be skipped, even if empty. + assert(position == 0 && enc->count_ == 1); + encoded_frame->is_key_frame_ = 1; + enc->flush_count_ = 0; + enc->count_since_key_frame_ = 0; + enc->prev_candidate_undecided_ = 0; + } else { + ++enc->count_since_key_frame_; + if (enc->count_since_key_frame_ <= enc->options_.kmin) { + // Add this as a frame rectangle. + error_code = SetFrame(enc, config, 0, encoded_frame, &frame_skipped); + if (error_code != VP8_ENC_OK) goto End; + if (frame_skipped) goto Skip; + encoded_frame->is_key_frame_ = 0; + enc->flush_count_ = enc->count_ - 1; + enc->prev_candidate_undecided_ = 0; + } else { + int64_t curr_delta; + + // Add this as a frame rectangle to enc. + error_code = SetFrame(enc, config, 0, encoded_frame, &frame_skipped); + if (error_code != VP8_ENC_OK) goto End; + if (frame_skipped) goto Skip; + + // Add this as a key-frame to enc, too. + error_code = SetFrame(enc, config, 1, encoded_frame, &frame_skipped); + if (error_code != VP8_ENC_OK) goto End; + assert(frame_skipped == 0); // Key-frame cannot be an empty rectangle. + + // Analyze size difference of the two variants. + curr_delta = KeyFramePenalty(encoded_frame); + if (curr_delta <= enc->best_delta_) { // Pick this as the key-frame. + if (enc->keyframe_ != KEYFRAME_NONE) { + EncodedFrame* const old_keyframe = GetFrame(enc, enc->keyframe_); + assert(old_keyframe->is_key_frame_); + old_keyframe->is_key_frame_ = 0; + } + encoded_frame->is_key_frame_ = 1; + enc->keyframe_ = (int)position; + enc->best_delta_ = curr_delta; + enc->flush_count_ = enc->count_ - 1; // We can flush previous frames. + } else { + encoded_frame->is_key_frame_ = 0; + } + // Note: We need '>=' below because when kmin and kmax are both zero, + // count_since_key_frame will always be > kmax. + if (enc->count_since_key_frame_ >= enc->options_.kmax) { + enc->flush_count_ = enc->count_ - 1; + enc->count_since_key_frame_ = 0; + enc->keyframe_ = KEYFRAME_NONE; + enc->best_delta_ = DELTA_INFINITY; + } + enc->prev_candidate_undecided_ = 1; + } + } + + // Update previous to previous and previous canvases for next call. + WebPCopyPixels(enc->curr_canvas_, &enc->prev_canvas_); + enc->is_first_frame_ = 0; + + Skip: + ok = 1; + ++enc->in_frame_count_; + + End: + if (!ok || frame_skipped) { + FrameRelease(encoded_frame); + // We reset some counters, as the frame addition failed/was skipped. + --enc->count_; + if (!enc->is_first_frame_) --enc->count_since_key_frame_; + if (!ok) { + MarkError2(enc, "ERROR adding frame. WebPEncodingError", error_code); + } + } + enc->curr_canvas_->error_code = error_code; // report error_code + assert(ok || error_code != VP8_ENC_OK); + return ok; +} + +static int FlushFrames(WebPAnimEncoder* const enc) { + while (enc->flush_count_ > 0) { + WebPMuxError err; + EncodedFrame* const curr = GetFrame(enc, 0); + const WebPMuxFrameInfo* const info = + curr->is_key_frame_ ? &curr->key_frame_ : &curr->sub_frame_; + assert(enc->mux_ != NULL); + err = WebPMuxPushFrame(enc->mux_, info, 1); + if (err != WEBP_MUX_OK) { + MarkError2(enc, "ERROR adding frame. WebPMuxError", err); + return 0; + } + if (enc->options_.verbose) { + fprintf(stderr, "INFO: Added frame. offset:%d,%d dispose:%d blend:%d\n", + info->x_offset, info->y_offset, info->dispose_method, + info->blend_method); + } + ++enc->out_frame_count_; + FrameRelease(curr); + ++enc->start_; + --enc->flush_count_; + --enc->count_; + if (enc->keyframe_ != KEYFRAME_NONE) --enc->keyframe_; + } + + if (enc->count_ == 1 && enc->start_ != 0) { + // Move enc->start to index 0. + const int enc_start_tmp = (int)enc->start_; + EncodedFrame temp = enc->encoded_frames_[0]; + enc->encoded_frames_[0] = enc->encoded_frames_[enc_start_tmp]; + enc->encoded_frames_[enc_start_tmp] = temp; + FrameRelease(&enc->encoded_frames_[enc_start_tmp]); + enc->start_ = 0; + } + return 1; +} + +#undef DELTA_INFINITY +#undef KEYFRAME_NONE + +int WebPAnimEncoderAdd(WebPAnimEncoder* enc, WebPPicture* frame, int timestamp, + const WebPConfig* encoder_config) { + WebPConfig config; + int ok; + + if (enc == NULL) { + return 0; + } + MarkNoError(enc); + + if (!enc->is_first_frame_) { + // Make sure timestamps are non-decreasing (integer wrap-around is OK). + const uint32_t prev_frame_duration = + (uint32_t)timestamp - enc->prev_timestamp_; + if (prev_frame_duration >= MAX_DURATION) { + if (frame != NULL) { + frame->error_code = VP8_ENC_ERROR_INVALID_CONFIGURATION; + } + MarkError(enc, "ERROR adding frame: timestamps must be non-decreasing"); + return 0; + } + if (!IncreasePreviousDuration(enc, (int)prev_frame_duration)) { + return 0; + } + } else { + enc->first_timestamp_ = timestamp; + } + + if (frame == NULL) { // Special: last call. + enc->got_null_frame_ = 1; + enc->prev_timestamp_ = timestamp; + return 1; + } + + if (frame->width != enc->canvas_width_ || + frame->height != enc->canvas_height_) { + frame->error_code = VP8_ENC_ERROR_INVALID_CONFIGURATION; + MarkError(enc, "ERROR adding frame: Invalid frame dimensions"); + return 0; + } + + if (!frame->use_argb) { // Convert frame from YUV(A) to ARGB. + if (enc->options_.verbose) { + fprintf(stderr, "WARNING: Converting frame from YUV(A) to ARGB format; " + "this incurs a small loss.\n"); + } + if (!WebPPictureYUVAToARGB(frame)) { + MarkError(enc, "ERROR converting frame from YUV(A) to ARGB"); + return 0; + } + } + + if (encoder_config != NULL) { + if (!WebPValidateConfig(encoder_config)) { + MarkError(enc, "ERROR adding frame: Invalid WebPConfig"); + return 0; + } + config = *encoder_config; + } else { + WebPConfigInit(&config); + config.lossless = 1; + } + assert(enc->curr_canvas_ == NULL); + enc->curr_canvas_ = frame; // Store reference. + assert(enc->curr_canvas_copy_modified_ == 1); + CopyCurrentCanvas(enc); + + ok = CacheFrame(enc, &config) && FlushFrames(enc); + + enc->curr_canvas_ = NULL; + enc->curr_canvas_copy_modified_ = 1; + if (ok) { + enc->prev_timestamp_ = timestamp; + } + return ok; +} + +// ----------------------------------------------------------------------------- +// Bitstream assembly. + +static int DecodeFrameOntoCanvas(const WebPMuxFrameInfo* const frame, + WebPPicture* const canvas) { + const WebPData* const image = &frame->bitstream; + WebPPicture sub_image; + WebPDecoderConfig config; + WebPInitDecoderConfig(&config); + WebPUtilClearPic(canvas, NULL); + if (WebPGetFeatures(image->bytes, image->size, &config.input) != + VP8_STATUS_OK) { + return 0; + } + if (!WebPPictureView(canvas, frame->x_offset, frame->y_offset, + config.input.width, config.input.height, &sub_image)) { + return 0; + } + config.output.is_external_memory = 1; + config.output.colorspace = MODE_BGRA; + config.output.u.RGBA.rgba = (uint8_t*)sub_image.argb; + config.output.u.RGBA.stride = sub_image.argb_stride * 4; + config.output.u.RGBA.size = config.output.u.RGBA.stride * sub_image.height; + + if (WebPDecode(image->bytes, image->size, &config) != VP8_STATUS_OK) { + return 0; + } + return 1; +} + +static int FrameToFullCanvas(WebPAnimEncoder* const enc, + const WebPMuxFrameInfo* const frame, + WebPData* const full_image) { + WebPPicture* const canvas_buf = &enc->curr_canvas_copy_; + WebPMemoryWriter mem1, mem2; + WebPMemoryWriterInit(&mem1); + WebPMemoryWriterInit(&mem2); + + if (!DecodeFrameOntoCanvas(frame, canvas_buf)) goto Err; + if (!EncodeFrame(&enc->last_config_, canvas_buf, &mem1)) goto Err; + GetEncodedData(&mem1, full_image); + + if (enc->options_.allow_mixed) { + if (!EncodeFrame(&enc->last_config_reversed_, canvas_buf, &mem2)) goto Err; + if (mem2.size < mem1.size) { + GetEncodedData(&mem2, full_image); + WebPMemoryWriterClear(&mem1); + } else { + WebPMemoryWriterClear(&mem2); + } + } + return 1; + + Err: + WebPMemoryWriterClear(&mem1); + WebPMemoryWriterClear(&mem2); + return 0; +} + +// Convert a single-frame animation to a non-animated image if appropriate. +// TODO(urvang): Can we pick one of the two heuristically (based on frame +// rectangle and/or presence of alpha)? +static WebPMuxError OptimizeSingleFrame(WebPAnimEncoder* const enc, + WebPData* const webp_data) { + WebPMuxError err = WEBP_MUX_OK; + int canvas_width, canvas_height; + WebPMuxFrameInfo frame; + WebPData full_image; + WebPData webp_data2; + WebPMux* const mux = WebPMuxCreate(webp_data, 0); + if (mux == NULL) return WEBP_MUX_BAD_DATA; + assert(enc->out_frame_count_ == 1); + WebPDataInit(&frame.bitstream); + WebPDataInit(&full_image); + WebPDataInit(&webp_data2); + + err = WebPMuxGetFrame(mux, 1, &frame); + if (err != WEBP_MUX_OK) goto End; + if (frame.id != WEBP_CHUNK_ANMF) goto End; // Non-animation: nothing to do. + err = WebPMuxGetCanvasSize(mux, &canvas_width, &canvas_height); + if (err != WEBP_MUX_OK) goto End; + if (!FrameToFullCanvas(enc, &frame, &full_image)) { + err = WEBP_MUX_BAD_DATA; + goto End; + } + err = WebPMuxSetImage(mux, &full_image, 1); + if (err != WEBP_MUX_OK) goto End; + err = WebPMuxAssemble(mux, &webp_data2); + if (err != WEBP_MUX_OK) goto End; + + if (webp_data2.size < webp_data->size) { // Pick 'webp_data2' if smaller. + WebPDataClear(webp_data); + *webp_data = webp_data2; + WebPDataInit(&webp_data2); + } + + End: + WebPDataClear(&frame.bitstream); + WebPDataClear(&full_image); + WebPMuxDelete(mux); + WebPDataClear(&webp_data2); + return err; +} + +int WebPAnimEncoderAssemble(WebPAnimEncoder* enc, WebPData* webp_data) { + WebPMux* mux; + WebPMuxError err; + + if (enc == NULL) { + return 0; + } + MarkNoError(enc); + + if (webp_data == NULL) { + MarkError(enc, "ERROR assembling: NULL input"); + return 0; + } + + if (enc->in_frame_count_ == 0) { + MarkError(enc, "ERROR: No frames to assemble"); + return 0; + } + + if (!enc->got_null_frame_ && enc->in_frame_count_ > 1 && enc->count_ > 0) { + // set duration of the last frame to be avg of durations of previous frames. + const double delta_time = enc->prev_timestamp_ - enc->first_timestamp_; + const int average_duration = (int)(delta_time / (enc->in_frame_count_ - 1)); + if (!IncreasePreviousDuration(enc, average_duration)) { + return 0; + } + } + + // Flush any remaining frames. + enc->flush_count_ = enc->count_; + if (!FlushFrames(enc)) { + return 0; + } + + // Set definitive canvas size. + mux = enc->mux_; + err = WebPMuxSetCanvasSize(mux, enc->canvas_width_, enc->canvas_height_); + if (err != WEBP_MUX_OK) goto Err; + + err = WebPMuxSetAnimationParams(mux, &enc->options_.anim_params); + if (err != WEBP_MUX_OK) goto Err; + + // Assemble into a WebP bitstream. + err = WebPMuxAssemble(mux, webp_data); + if (err != WEBP_MUX_OK) goto Err; + + if (enc->out_frame_count_ == 1) { + err = OptimizeSingleFrame(enc, webp_data); + if (err != WEBP_MUX_OK) goto Err; + } + return 1; + + Err: + MarkError2(enc, "ERROR assembling WebP", err); + return 0; +} + +const char* WebPAnimEncoderGetError(WebPAnimEncoder* enc) { + if (enc == NULL) return NULL; + return enc->error_str_; +} + +// ----------------------------------------------------------------------------- diff --git a/thirdparty/libwebp/mux/muxedit.c b/thirdparty/libwebp/mux/muxedit.c new file mode 100644 index 0000000000..9bbed42b1a --- /dev/null +++ b/thirdparty/libwebp/mux/muxedit.c @@ -0,0 +1,696 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +#include <assert.h> +#include "./muxi.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// Life of a mux object. + +static void MuxInit(WebPMux* const mux) { + 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*)WebPSafeMalloc(1ULL, sizeof(WebPMux)); + if (mux != NULL) MuxInit(mux); + return mux; + } +} + +// 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) { + 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 != NULL) { + MuxRelease(mux); + WebPSafeFree(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, tag); \ + if (err == WEBP_MUX_OK) { \ + err = ChunkSetNth(&chunk, (LIST), nth); \ + } \ + return err; \ + } + +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_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 + +// 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; + + 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_frgm_bytes = (uint8_t*)WebPSafeMalloc(1ULL, frame_frgm_size); + if (frame_frgm_bytes == NULL) return WEBP_MUX_MEMORY_ERROR; + + PutLE24(frame_frgm_bytes + 0, info->x_offset / 2); + PutLE24(frame_frgm_bytes + 3, info->y_offset / 2); + + if (is_frame) { + 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_frgm->bytes = frame_frgm_bytes; + frame_frgm->size = frame_frgm_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, uint32_t tag) { + const WebPChunkId id = ChunkGetIdFromTag(tag); + assert(mux != NULL); + if (IsWPI(id)) return WEBP_MUX_INVALID_ARGUMENT; + return DeleteChunks(MuxGetChunkListFromId(mux, id), tag); +} + +//------------------------------------------------------------------------------ +// Set API(s). + +WebPMuxError WebPMuxSetChunk(WebPMux* mux, const char fourcc[4], + const WebPData* chunk_data, int copy_data) { + uint32_t tag; + WebPMuxError err; + 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); + + // Delete existing chunk(s) with the same 'fourcc'. + err = MuxDeleteAllNamedData(mux, tag); + if (err != WEBP_MUX_OK && err != WEBP_MUX_NOT_FOUND) return err; + + // Add the given chunk. + return MuxSet(mux, tag, 1, chunk_data, copy_data); +} + +// 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, data, copy_data, tag); + if (err != WEBP_MUX_OK) goto Err; + err = ChunkSetNth(&chunk, chunk_list, 1); + if (err != WEBP_MUX_OK) goto Err; + return WEBP_MUX_OK; + Err: + ChunkRelease(&chunk); + return err; +} + +// 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; + } + 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 WebPMuxSetImage(WebPMux* mux, const WebPData* bitstream, + int copy_data) { + WebPMuxImage wpi; + WebPMuxError err; + + // Sanity checks. + if (mux == NULL || bitstream == NULL || bitstream->bytes == NULL || + bitstream->size > MAX_CHUNK_PAYLOAD) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + if (mux->images_ != NULL) { + // Only one 'simple image' can be added in mux. So, remove present images. + DeleteAllImages(&mux->images_); + } + + MuxImageInit(&wpi); + err = SetAlphaAndImageChunks(bitstream, copy_data, &wpi); + if (err != WEBP_MUX_OK) goto Err; + + // 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. + MuxImageRelease(&wpi); + return err; +} + +WebPMuxError WebPMuxPushFrame(WebPMux* mux, const WebPMuxFrameInfo* frame, + int copy_data) { + WebPMuxImage wpi; + WebPMuxError err; + int is_frame; + const WebPData* const bitstream = &frame->bitstream; + + // Sanity checks. + 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 (frame->id == WEBP_CHUNK_FRGM) { // Dead experiment. + return WEBP_MUX_INVALID_ARGUMENT; + } + + if (bitstream->bytes == NULL || bitstream->size > MAX_CHUNK_PAYLOAD) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + 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. + } + } + + MuxImageInit(&wpi); + 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; + // 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; + } + + // 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. + MuxImageRelease(&wpi); + return err; +} + +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 || params == NULL) return WEBP_MUX_INVALID_ARGUMENT; + if (params->loop_count < 0 || params->loop_count >= MAX_LOOP_COUNT) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // 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; + + // 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 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; + + mux->canvas_width_ = width; + mux->canvas_height_ = height; + return WEBP_MUX_OK; +} + +//------------------------------------------------------------------------------ +// Delete API(s). + +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) { + if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT; + return MuxImageDeleteNth(&mux->images_, nth); +} + +//------------------------------------------------------------------------------ +// Assembly of the WebP RIFF file. + +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 ? 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; +} + +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 frame_frgm_chunk = wpi->header_; + WebPMuxError err; + assert(wpi != NULL); + assert(frame_frgm_chunk != NULL); + + // 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. + if (width != NULL) *width = wpi->width_; + if (height != NULL) *height = wpi->height_; + return WEBP_MUX_OK; +} + +// 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); + + wpi = mux->images_; + assert(wpi != NULL); + assert(wpi->img_ != NULL); + + if (wpi->next_ != NULL) { + int max_x = 0; + int max_y = 0; + int64_t image_area = 0; + // 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 = 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; + 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 + // 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, canvas dimensions are same as image dimensions. + *width = wpi->width_; + *height = wpi->height_; + } + 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 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) { + 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, 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) { + flags |= ICCP_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_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. + } + + err = GetAdjustedCanvasSize(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 (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 && mux->unknown_ == NULL) { + // For simple file format, 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; + } + + PutLE32(data + 0, flags); // VP8X chunk flags. + PutLE24(data + 4, width - 1); // canvas width. + PutLE24(data + 7, height - 1); // canvas height. + + 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; + WebPMuxError err; + + 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)); + + if (mux == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // 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 = 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*)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->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) { + WebPSafeFree(data); + data = NULL; + size = 0; + } + + // Finalize data. + assembled_data->bytes = data; + assembled_data->size = size; + + return err; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/mux/muxi.h b/thirdparty/libwebp/mux/muxi.h new file mode 100644 index 0000000000..d4d5cbad91 --- /dev/null +++ b/thirdparty/libwebp/mux/muxi.h @@ -0,0 +1,232 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// 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 "../webp/mux.h" + +#ifdef __cplusplus +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Defines and constants. + +#define MUX_MAJ_VERSION 0 +#define MUX_MIN_VERSION 3 +#define MUX_REV_VERSION 1 + +// Chunk object. +typedef struct WebPChunk WebPChunk; +struct WebPChunk { + uint32_t tag_; + int owner_; // True if *data_ memory is owned internally. + // 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 ANMF/FRGM chunk, ALPH +// chunk and VP8/VP8L chunk), +typedef struct WebPMuxImage WebPMuxImage; +struct WebPMuxImage { + 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_; +}; + +// Main mux object. Stores data chunks. +struct WebPMux { + WebPMuxImage* images_; + WebPChunk* iccp_; + WebPChunk* exif_; + WebPChunk* xmp_; + WebPChunk* anim_; + WebPChunk* vp8x_; + + WebPChunk* unknown_; + int canvas_width_; + int canvas_height_; +}; + +// 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_ANIM, + IDX_ANMF, + IDX_FRGM, + IDX_ALPHA, + IDX_VP8, + IDX_VP8L, + IDX_EXIF, + IDX_XMP, + IDX_UNKNOWN, + + IDX_NIL, + IDX_LAST_CHUNK +} CHUNK_INDEX; + +#define NIL_TAG 0x00000000u // To signal void chunk. + +typedef struct { + uint32_t tag; + WebPChunkId id; + uint32_t size; +} ChunkInfo; + +extern const ChunkInfo kChunks[IDX_LAST_CHUNK]; + +//------------------------------------------------------------------------------ +// Chunk object management. + +// Initialize. +void ChunkInit(WebPChunk* const chunk); + +// 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_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); + +// 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". +// 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_. +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; + assert(data_size < MAX_CHUNK_PAYLOAD); + return SizeWithPadding(data_size); +} + +// Total size of a list of chunks. +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); + +//------------------------------------------------------------------------------ +// 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); + +// 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_ANMF: + case WEBP_CHUNK_FRGM: + case WEBP_CHUNK_ALPHA: + case WEBP_CHUNK_IMAGE: return 1; + default: return 0; + } +} + +// Pushes 'wpi' at the end of 'wpi_list'. +WebPMuxError MuxImagePush(const WebPMuxImage* wpi, WebPMuxImage** wpi_list); + +// Delete nth image in the image list. +WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth); + +// Get nth image in the image list. +WebPMuxError MuxImageGetNth(const WebPMuxImage** wpi_list, uint32_t nth, + WebPMuxImage** wpi); + +// Total size of the given image. +size_t MuxImageDiskSize(const WebPMuxImage* const wpi); + +// Write out the given image into 'dst'. +uint8_t* MuxImageEmit(const WebPMuxImage* const wpi, uint8_t* dst); + +//------------------------------------------------------------------------------ +// Helper methods for mux. + +// 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. +WebPChunk** MuxGetChunkListFromId(const WebPMux* mux, WebPChunkId id); + +// Validates the given mux object. +WebPMuxError MuxValidate(const WebPMux* const mux); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_MUX_MUXI_H_ */ diff --git a/thirdparty/libwebp/mux/muxinternal.c b/thirdparty/libwebp/mux/muxinternal.c new file mode 100644 index 0000000000..4babbe82fc --- /dev/null +++ b/thirdparty/libwebp/mux/muxinternal.c @@ -0,0 +1,551 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +#include <assert.h> +#include "./muxi.h" +#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('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('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 } +}; + +//------------------------------------------------------------------------------ + +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) { + 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 (CHUNK_INDEX)i; + } + return IDX_UNKNOWN; +} + +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_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); +} + +//------------------------------------------------------------------------------ +// Chunk search methods. + +// Returns next chunk in the chunk list with the given tag. +static WebPChunk* ChunkSearchNextInList(WebPChunk* chunk, uint32_t tag) { + while (chunk != NULL && 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 == NULL) 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 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 != NULL); + *location = chunk_list; + + while (*chunk_list != NULL) { + 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_ANIM].tag) { + copy_data = 1; + } + + ChunkRelease(chunk); + + if (data != NULL) { + 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(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*)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; +} + +//------------------------------------------------------------------------------ +// Chunk deletion method(s). + +WebPChunk* ChunkDelete(WebPChunk* const chunk) { + WebPChunk* const next = ChunkRelease(chunk); + WebPSafeFree(chunk); + return next; +} + +void ChunkListDelete(WebPChunk** const chunk_list) { + while (*chunk_list != NULL) { + *chunk_list = ChunkDelete(*chunk_list); + } +} + +//------------------------------------------------------------------------------ +// Chunk serialization methods. + +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 != NULL) { + dst = ChunkEmit(chunk_list, dst); + chunk_list = chunk_list->next_; + } + return dst; +} + +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 size; +} + +//------------------------------------------------------------------------------ +// 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_); + ChunkListDelete(&wpi->unknown_); + + next = wpi->next_; + MuxImageInit(wpi); + return next; +} + +//------------------------------------------------------------------------------ +// 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_) { + 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; +} + +// Outputs a pointer to 'prev_wpi->next_', +// where 'prev_wpi' is the pointer to the image at position (nth - 1). +// Returns true if nth image was found. +static int SearchImageToGetOrDelete(WebPMuxImage** wpi_list, uint32_t nth, + WebPMuxImage*** const location) { + uint32_t count = 0; + assert(wpi_list); + *location = wpi_list; + + if (nth == 0) { + nth = MuxImageCount(*wpi_list, WEBP_CHUNK_NIL); + if (nth == 0) return 0; // Not found. + } + + while (*wpi_list != NULL) { + WebPMuxImage* const cur_wpi = *wpi_list; + ++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*)WebPSafeMalloc(1ULL, 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); + WebPSafeFree(wpi); + return next; +} + +WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth) { + assert(wpi_list); + if (!SearchImageToGetOrDelete(wpi_list, nth, &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, + WebPMuxImage** wpi) { + assert(wpi_list); + assert(wpi); + if (!SearchImageToGetOrDelete((WebPMuxImage**)wpi_list, nth, + (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_); + if (wpi->unknown_ != NULL) size += ChunkListDiskSize(wpi->unknown_); + return size; +} + +// 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 dst + ChunkDiskSize(header); +} + +uint8_t* MuxImageEmit(const WebPMuxImage* const wpi, uint8_t* dst) { + // Ordering of chunks to be emitted is strictly as follows: + // 1. ANMF/FRGM chunk (if present). + // 2. ALPH chunk (if present). + // 3. VP8/VP8L chunk. + assert(wpi); + 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); + if (wpi->unknown_ != NULL) dst = ChunkListEmit(wpi->unknown_, dst); + return dst; +} + +//------------------------------------------------------------------------------ +// Helper methods for mux. + +int MuxHasAlpha(const WebPMuxImage* images) { + while (images != NULL) { + if (images->has_alpha_) 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_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_; + } +} + +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, + uint32_t 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_exif; + int num_xmp; + int num_anim; + int num_frames; + int num_fragments; + 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 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_XMP, XMP_FLAG, flags, 1, &num_xmp); + if (err != WEBP_MUX_OK) return err; + + // 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_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_anim == 0 || num_frames == 0)) { + return WEBP_MUX_INVALID_ARGUMENT; + } + if (!has_animation && (num_anim == 1 || num_frames > 0)) { + return WEBP_MUX_INVALID_ARGUMENT; + } + } + + // 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 + // 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 (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_fragments & num_images are consistent. + if (num_fragments > 0 && num_images != num_fragments) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + return WEBP_MUX_OK; +} + +#undef NO_FLAG + +//------------------------------------------------------------------------------ + diff --git a/thirdparty/libwebp/mux/muxread.c b/thirdparty/libwebp/mux/muxread.c new file mode 100644 index 0000000000..8957a1e46e --- /dev/null +++ b/thirdparty/libwebp/mux/muxread.c @@ -0,0 +1,544 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +#include <assert.h> +#include "./muxi.h" +#include "../utils/utils.h" + +//------------------------------------------------------------------------------ +// 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_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; +} +#undef SWITCH_ID_LIST + +// Fill the chunk with the given data (includes chunk header bytes), after some +// verifications. +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 < CHUNK_HEADER_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)); +} + +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. + +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*)WebPSafeMalloc(1ULL, sizeof(*wpi)); + if (wpi == NULL) goto Err; + MuxImageInit(wpi); + + // Loop over chunks. + while (data != end) { + size_t data_size; + WebPChunkId id; + 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_); + 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. + 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); + } + + // 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). + +// 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; + } +} + +// 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. + 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 (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; + 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(const 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 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*)WebPSafeMalloc(1ULL, size); + if (data == NULL) return WEBP_MUX_MEMORY_ERROR; + + // Main RIFF header. + dst = MuxEmitRiffHeader(data, size); + + if (need_vp8x) { + dst = EmitVP8XChunk(dst, wpi->width_, wpi->height_, 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 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; + } + 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; + } +} + +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); +} + +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); +} + +WebPMuxError WebPMuxGetFrame( + const WebPMux* mux, uint32_t nth, WebPMuxFrameInfo* frame) { + WebPMuxError err; + WebPMuxImage* wpi; + + // Sanity checks. + if (mux == NULL || frame == NULL) { + return WEBP_MUX_INVALID_ARGUMENT; + } + + // Get the nth WebPMuxImage. + err = MuxImageGetNth((const WebPMuxImage**)&mux->images_, nth, &wpi); + if (err != WEBP_MUX_OK) return err; + + // Get frame info. + if (wpi->header_ == NULL) { + return MuxGetImageInternal(wpi, frame); + } else { + return MuxGetFrameFragmentInternal(wpi, frame); + } +} + +WebPMuxError WebPMuxGetAnimationParams(const WebPMux* mux, + WebPMuxAnimParams* params) { + WebPData anim; + WebPMuxError err; + + if (mux == NULL || params == NULL) return WEBP_MUX_INVALID_ARGUMENT; + + 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); + + 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 (CHUNK_INDEX)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); + const CHUNK_INDEX idx = ChunkGetIndexFromId(id); + *num_elements = CountChunks(*chunk_list, kChunks[idx].tag); + } + + return WEBP_MUX_OK; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/utils/bit_reader.c b/thirdparty/libwebp/utils/bit_reader.c new file mode 100644 index 0000000000..2eb46e0b4b --- /dev/null +++ b/thirdparty/libwebp/utils/bit_reader.c @@ -0,0 +1,229 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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 non-inlined methods +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include "./bit_reader_inl.h" +#include "../utils/utils.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, size_t size) { + assert(br != NULL); + assert(start != NULL); + assert(size < (1u << 31)); // limit ensured by format and upstream checks + br->range_ = 255 - 1; + br->value_ = 0; + br->bits_ = -8; // to load the very first 8bits + br->eof_ = 0; + VP8BitReaderSetBuffer(br, start, size); +// -- GODOT -- begin +#ifdef JAVASCRIPT_ENABLED // html5 required aligned reads + while(((uintptr_t)br->buf_ & 1) != 0 && !br->eof_) + VP8LoadFinalBytes(br); +#else + VP8LoadNewBytes(br); +#endif +// -- GODOT -- end +} + +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] = { + 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 +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 +}; + +void VP8LoadFinalBytes(VP8BitReader* const br) { + assert(br != NULL && br->buf_ != NULL); + // Only read 8bits at a time + if (br->buf_ < br->buf_end_) { + 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. + } +} + +//------------------------------------------------------------------------------ +// 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 VP8L_LOG8_WBITS 4 // Number of bytes needed to store VP8L_WBITS bits. + +#if defined(__arm__) || defined(_M_ARM) || defined(__aarch64__) || \ + defined(__i386__) || defined(_M_IX86) || \ + defined(__x86_64__) || defined(_M_X64) +#define VP8L_USE_FAST_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, + 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->len_ = length; + br->val_ = 0; + br->bit_pos_ = 0; + br->eos_ = 0; + + 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, + 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->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_ |= ((vp8l_val_t)br->buf_[br->pos_]) << (VP8L_LBITS - 8); + ++br->pos_; + br->bit_pos_ -= 8; + } + if (VP8LIsEndOfStream(br)) { + VP8LSetEndOfStream(br); + } +} + +void VP8LDoFillBitWindow(VP8LBitReader* const br) { + assert(br->bit_pos_ >= VP8L_WBITS); +#if defined(VP8L_USE_FAST_LOAD) + if (br->pos_ + sizeof(br->val_) < br->len_) { + br->val_ >>= VP8L_WBITS; + br->bit_pos_ -= VP8L_WBITS; + br->val_ |= (vp8l_val_t)HToLE32(WebPMemToUint32(br->buf_ + br->pos_)) << + (VP8L_LBITS - VP8L_WBITS); + br->pos_ += VP8L_LOG8_WBITS; + return; + } +#endif + ShiftBytes(br); // Slow path. +} + +uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits) { + assert(n_bits >= 0); + // Flag an error if end_of_stream or n_bits is more than allowed limit. + 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 { + VP8LSetEndOfStream(br); + return 0; + } +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/utils/bit_reader.h b/thirdparty/libwebp/utils/bit_reader.h new file mode 100644 index 0000000000..ea5c584eb4 --- /dev/null +++ b/thirdparty/libwebp/utils/bit_reader.h @@ -0,0 +1,184 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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 +// +// 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 "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// 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. + +// -- GODOT -- start +#ifdef JAVASCRIPT_ENABLED +#define BITS 16 +#else +// -- GODOT -- end + +#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(__aarch64__) // ARM 64bit +#define BITS 56 +#elif defined(__mips__) // MIPS +#define BITS 24 +#else // reasonable default +#define BITS 24 +#endif + +// -- GODOT -- start +#endif +// -- GODOT -- end + +//------------------------------------------------------------------------------ +// 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; +#endif + +typedef uint32_t range_t; + +//------------------------------------------------------------------------------ +// 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 +}; + +// Initialize the bit reader and the boolean decoder. +void VP8InitBitReader(VP8BitReader* const br, + 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); +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); + +// 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. + +// ----------------------------------------------------------------------------- +// Bitreader for lossless format + +// 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. + +typedef uint64_t vp8l_val_t; // right now, this bit-reader can only use 64bit. + +typedef struct { + 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, + 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 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); + +// 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)); +} + +// 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); +} + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_BIT_READER_H_ */ diff --git a/thirdparty/libwebp/utils/bit_reader_inl.h b/thirdparty/libwebp/utils/bit_reader_inl.h new file mode 100644 index 0000000000..99ed3137d2 --- /dev/null +++ b/thirdparty/libwebp/utils/bit_reader_inl.h @@ -0,0 +1,173 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Specific inlined methods for boolean decoder [VP8GetBit() ...] +// This file should be included by the .c sources that actually need to call +// these methods. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_UTILS_BIT_READER_INL_H_ +#define WEBP_UTILS_BIT_READER_INL_H_ + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#ifdef WEBP_FORCE_ALIGNED +#include <string.h> // memcpy +#endif + +#include "../dsp/dsp.h" +#include "./bit_reader.h" +#include "./endian_inl.h" + +#ifdef __cplusplus +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// Derived type lbit_t = natural type for memory I/O + +#if (BITS > 32) +typedef uint64_t lbit_t; +#elif (BITS > 16) +typedef uint32_t lbit_t; +#elif (BITS > 8) +typedef uint16_t lbit_t; +#else +typedef uint8_t lbit_t; +#endif + +extern const uint8_t kVP8Log2Range[128]; +extern const uint8_t kVP8NewRange[128]; + +// special case for the tail byte-reading +void VP8LoadFinalBytes(VP8BitReader* const br); + +//------------------------------------------------------------------------------ +// Inlined critical functions + +// makes sure br->value_ has at least BITS bits worth of data +static WEBP_UBSAN_IGNORE_UNDEF WEBP_INLINE +void VP8LoadNewBytes(VP8BitReader* const br) { + assert(br != NULL && br->buf_ != NULL); + // Read 'BITS' bits at a time if possible. + if (br->buf_ < br->buf_max_) { + // convert memory type to register type (with some zero'ing!) + bit_t bits; +#if defined(WEBP_FORCE_ALIGNED) + lbit_t in_bits; + memcpy(&in_bits, br->buf_, sizeof(in_bits)); +#elif defined(WEBP_USE_MIPS32) + // This is needed because of un-aligned read. + lbit_t in_bits; + lbit_t* p_buf_ = (lbit_t*)br->buf_; + __asm__ volatile( + ".set push \n\t" + ".set at \n\t" + ".set macro \n\t" + "ulw %[in_bits], 0(%[p_buf_]) \n\t" + ".set pop \n\t" + : [in_bits]"=r"(in_bits) + : [p_buf_]"r"(p_buf_) + : "memory", "at" + ); +#else + const lbit_t in_bits = *(const lbit_t*)br->buf_; +#endif + br->buf_ += BITS >> 3; +#if !defined(WORDS_BIGENDIAN) +#if (BITS > 32) + bits = BSwap64(in_bits); + bits >>= 64 - BITS; +#elif (BITS >= 24) + bits = BSwap32(in_bits); + bits >>= (32 - BITS); +#elif (BITS == 16) + bits = BSwap16(in_bits); +#else // BITS == 8 + bits = (bit_t)in_bits; +#endif // BITS > 32 +#else // WORDS_BIGENDIAN + bits = (bit_t)in_bits; + if (BITS != 8 * sizeof(bit_t)) bits >>= (8 * sizeof(bit_t) - BITS); +#endif + br->value_ = bits | (br->value_ << BITS); + br->bits_ += BITS; + } else { + VP8LoadFinalBytes(br); // no need to be inlined + } +} + +// Read a bit with proba 'prob'. Speed-critical function! +static WEBP_INLINE int VP8GetBit(VP8BitReader* const br, int prob) { + // Don't move this declaration! It makes a big speed difference to store + // 'range' *before* calling VP8LoadNewBytes(), even if this function doesn't + // alter br->range_ value. + range_t range = br->range_; + if (br->bits_ < 0) { + VP8LoadNewBytes(br); + } + { + const int pos = br->bits_; + const range_t split = (range * prob) >> 8; + const range_t value = (range_t)(br->value_ >> pos); +#if defined(__arm__) || defined(_M_ARM) // ARM-specific + const int bit = ((int)(split - value) >> 31) & 1; + if (value > split) { + range -= split + 1; + br->value_ -= (bit_t)(split + 1) << pos; + } else { + range = split; + } +#else // faster version on x86 + int bit; // Don't use 'const int bit = (value > split);", it's slower. + if (value > split) { + range -= split + 1; + br->value_ -= (bit_t)(split + 1) << pos; + bit = 1; + } else { + range = split; + bit = 0; + } +#endif + if (range <= (range_t)0x7e) { + const int shift = kVP8Log2Range[range]; + range = kVP8NewRange[range]; + br->bits_ -= shift; + } + br->range_ = range; + return bit; + } +} + +// simplified version of VP8GetBit() for prob=0x80 (note shift is always 1 here) +static WEBP_INLINE int VP8GetSigned(VP8BitReader* const br, int v) { + if (br->bits_ < 0) { + VP8LoadNewBytes(br); + } + { + const int pos = br->bits_; + const range_t split = br->range_ >> 1; + const range_t value = (range_t)(br->value_ >> pos); + const int32_t mask = (int32_t)(split - value) >> 31; // -1 or 0 + br->bits_ -= 1; + br->range_ += mask; + br->range_ |= 1; + br->value_ -= (bit_t)((split + 1) & mask) << pos; + return (v ^ mask) - mask; + } +} + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // WEBP_UTILS_BIT_READER_INL_H_ diff --git a/thirdparty/libwebp/utils/bit_writer.c b/thirdparty/libwebp/utils/bit_writer.c new file mode 100644 index 0000000000..064428691b --- /dev/null +++ b/thirdparty/libwebp/utils/bit_writer.c @@ -0,0 +1,319 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// 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" +#include "./endian_inl.h" +#include "./utils.h" + +//------------------------------------------------------------------------------ +// 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*)WebPSafeMalloc(1ULL, new_size); + if (new_buf == NULL) { + bw->error_ = 1; + return 0; + } + 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 Flush(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) Flush(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) Flush(bw); + } + return bit; +} + +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 VP8PutSignedBits(VP8BitWriter* const bw, int value, int nb_bits) { + if (!VP8PutBitUniform(bw, value != 0)) + return; + if (value < 0) { + VP8PutBits(bw, ((-value) << 1) | 1, nb_bits + 1); + } else { + VP8PutBits(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) { + VP8PutBits(bw, 0, 9 - bw->nb_bits_); + bw->nb_bits_ = 0; // pad with zeroes + Flush(bw); + return bw->buf_; +} + +int VP8BitWriterAppend(VP8BitWriter* const bw, + const uint8_t* data, size_t size) { + 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; + return 1; +} + +void VP8BitWriterWipeOut(VP8BitWriter* const bw) { + if (bw != NULL) { + WebPSafeFree(bw->buf_); + memset(bw, 0, sizeof(*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 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 (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*)WebPSafeMalloc(1ULL, allocated_size); + if (allocated_buf == NULL) { + bw->error_ = 1; + return 0; + } + if (current_size > 0) { + memcpy(allocated_buf, bw->buf_, current_size); + } + WebPSafeFree(bw->buf_); + bw->buf_ = allocated_buf; + bw->cur_ = bw->buf_ + current_size; + bw->end_ = bw->buf_ + allocated_size; + return 1; +} + +int VP8LBitWriterInit(VP8LBitWriter* const bw, size_t expected_size) { + memset(bw, 0, sizeof(*bw)); + return VP8LBitWriterResize(bw, expected_size); +} + +void VP8LBitWriterWipeOut(VP8LBitWriter* const bw) { + if (bw != NULL) { + WebPSafeFree(bw->buf_); + memset(bw, 0, sizeof(*bw)); + } +} + +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; + } + } + *(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; + } + bw->bits_ = lbits | ((vp8l_atype_t)bits << used); + bw->used_ = used + n_bits; + } +} + +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_; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/utils/bit_writer.h b/thirdparty/libwebp/utils/bit_writer.h new file mode 100644 index 0000000000..ef360d1dc6 --- /dev/null +++ b/thirdparty/libwebp/utils/bit_writer.h @@ -0,0 +1,145 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_UTILS_BIT_WRITER_H_ +#define WEBP_UTILS_BIT_WRITER_H_ + +#include "../webp/types.h" + +#ifdef __cplusplus +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 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, + 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 + +#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 + +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->cur_ - bw->buf_) + ((bw->used_ + 7) >> 3); +} + +// 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); + +// Internal function for VP8LPutBits flushing 32 bits from the written state. +void VP8LPutBitsFlushBits(VP8LBitWriter* const bw); + +// 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. +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); + } +} + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_BIT_WRITER_H_ */ diff --git a/thirdparty/libwebp/utils/color_cache.c b/thirdparty/libwebp/utils/color_cache.c new file mode 100644 index 0000000000..c34b2e7f1a --- /dev/null +++ b/thirdparty/libwebp/utils/color_cache.c @@ -0,0 +1,49 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Jyrki Alakuijala (jyrki@google.com) + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include "./color_cache.h" +#include "./utils.h" + +//------------------------------------------------------------------------------ +// 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; + cc->hash_bits_ = hash_bits; + return 1; +} + +void VP8LColorCacheClear(VP8LColorCache* const cc) { + if (cc != NULL) { + WebPSafeFree(cc->colors_); + cc->colors_ = NULL; + } +} + +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_)); +} diff --git a/thirdparty/libwebp/utils/color_cache.h b/thirdparty/libwebp/utils/color_cache.h new file mode 100644 index 0000000000..a9a9f64270 --- /dev/null +++ b/thirdparty/libwebp/utils/color_cache.h @@ -0,0 +1,80 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 +// +// Authors: Jyrki Alakuijala (jyrki@google.com) +// Urvang Joshi (urvang@google.com) + +#ifndef WEBP_UTILS_COLOR_CACHE_H_ +#define WEBP_UTILS_COLOR_CACHE_H_ + +#include "../webp/types.h" + +#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_bits_; +} VP8LColorCache; + +static const uint32_t kHashMul = 0x1e35a7bd; + +static WEBP_INLINE uint32_t VP8LColorCacheLookup( + const VP8LColorCache* const cc, uint32_t key) { + 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_; + 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); + +void VP8LColorCacheCopy(const VP8LColorCache* const src, + VP8LColorCache* const dst); + +// Delete the memory associated to color cache. +void VP8LColorCacheClear(VP8LColorCache* const color_cache); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} +#endif + +#endif // WEBP_UTILS_COLOR_CACHE_H_ diff --git a/thirdparty/libwebp/utils/endian_inl.h b/thirdparty/libwebp/utils/endian_inl.h new file mode 100644 index 0000000000..e11260ff7d --- /dev/null +++ b/thirdparty/libwebp/utils/endian_inl.h @@ -0,0 +1,100 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Endian related functions. + +#ifndef WEBP_UTILS_ENDIAN_INL_H_ +#define WEBP_UTILS_ENDIAN_INL_H_ + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include "../dsp/dsp.h" +#include "../webp/types.h" + +// some endian fix (e.g.: mips-gcc doesn't define __BIG_ENDIAN__) +#if !defined(WORDS_BIGENDIAN) && \ + (defined(__BIG_ENDIAN__) || defined(_M_PPC) || \ + (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))) +#define WORDS_BIGENDIAN +#endif + +#if defined(WORDS_BIGENDIAN) +#define HToLE32 BSwap32 +#define HToLE16 BSwap16 +#else +#define HToLE32(x) (x) +#define HToLE16(x) (x) +#endif + +#if !defined(HAVE_CONFIG_H) +#if LOCAL_GCC_PREREQ(4,8) || __has_builtin(__builtin_bswap16) +#define HAVE_BUILTIN_BSWAP16 +#endif +#if LOCAL_GCC_PREREQ(4,3) || __has_builtin(__builtin_bswap32) +#define HAVE_BUILTIN_BSWAP32 +#endif +#if LOCAL_GCC_PREREQ(4,3) || __has_builtin(__builtin_bswap64) +#define HAVE_BUILTIN_BSWAP64 +#endif +#endif // !HAVE_CONFIG_H + +static WEBP_INLINE uint16_t BSwap16(uint16_t x) { +#if defined(HAVE_BUILTIN_BSWAP16) + return __builtin_bswap16(x); +#elif defined(_MSC_VER) + return _byteswap_ushort(x); +#else + // gcc will recognize a 'rorw $8, ...' here: + return (x >> 8) | ((x & 0xff) << 8); +#endif // HAVE_BUILTIN_BSWAP16 +} + +static WEBP_INLINE uint32_t BSwap32(uint32_t x) { +#if defined(WEBP_USE_MIPS32_R2) + uint32_t ret; + __asm__ volatile ( + "wsbh %[ret], %[x] \n\t" + "rotr %[ret], %[ret], 16 \n\t" + : [ret]"=r"(ret) + : [x]"r"(x) + ); + return ret; +#elif defined(HAVE_BUILTIN_BSWAP32) + return __builtin_bswap32(x); +#elif defined(__i386__) || defined(__x86_64__) + uint32_t swapped_bytes; + __asm__ volatile("bswap %0" : "=r"(swapped_bytes) : "0"(x)); + return swapped_bytes; +#elif defined(_MSC_VER) + return (uint32_t)_byteswap_ulong(x); +#else + return (x >> 24) | ((x >> 8) & 0xff00) | ((x << 8) & 0xff0000) | (x << 24); +#endif // HAVE_BUILTIN_BSWAP32 +} + +static WEBP_INLINE uint64_t BSwap64(uint64_t x) { +#if defined(HAVE_BUILTIN_BSWAP64) + return __builtin_bswap64(x); +#elif defined(__x86_64__) + uint64_t swapped_bytes; + __asm__ volatile("bswapq %0" : "=r"(swapped_bytes) : "0"(x)); + return swapped_bytes; +#elif defined(_MSC_VER) + return (uint64_t)_byteswap_uint64(x); +#else // generic code for swapping 64-bit values (suggested by bdb@) + x = ((x & 0xffffffff00000000ull) >> 32) | ((x & 0x00000000ffffffffull) << 32); + x = ((x & 0xffff0000ffff0000ull) >> 16) | ((x & 0x0000ffff0000ffffull) << 16); + x = ((x & 0xff00ff00ff00ff00ull) >> 8) | ((x & 0x00ff00ff00ff00ffull) << 8); + return x; +#endif // HAVE_BUILTIN_BSWAP64 +} + +#endif // WEBP_UTILS_ENDIAN_INL_H_ diff --git a/thirdparty/libwebp/utils/filters.c b/thirdparty/libwebp/utils/filters.c new file mode 100644 index 0000000000..15543b1271 --- /dev/null +++ b/thirdparty/libwebp/utils/filters.c @@ -0,0 +1,76 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// filter estimation +// +// Author: Urvang (urvang@google.com) + +#include "./filters.h" +#include <stdlib.h> +#include <string.h> + +// ----------------------------------------------------------------------------- +// Quick estimate of a potentially interesting filter mode to try. + +#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 & ~0xff) == 0) ? g : (g < 0) ? 0 : 255; // clip to 8bit +} + +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; + 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; + } + } + { + 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; + for (i = 0; i < SMAX; ++i) { + if (bins[filter][i] > 0) { + score += i; + } + } + if (score < best_score) { + best_score = score; + best_filter = (WEBP_FILTER_TYPE)filter; + } + } + return best_filter; + } +} + +#undef SMAX +#undef SDIFF + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/utils/filters.h b/thirdparty/libwebp/utils/filters.h new file mode 100644 index 0000000000..088b132fc5 --- /dev/null +++ b/thirdparty/libwebp/utils/filters.h @@ -0,0 +1,32 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Urvang (urvang@google.com) + +#ifndef WEBP_UTILS_FILTERS_H_ +#define WEBP_UTILS_FILTERS_H_ + +#include "../webp/types.h" +#include "../dsp/dsp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// Fast estimate of a potentially good filter. +WEBP_FILTER_TYPE WebPEstimateBestFilter(const uint8_t* data, + int width, int height, int stride); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_FILTERS_H_ */ diff --git a/thirdparty/libwebp/utils/huffman.c b/thirdparty/libwebp/utils/huffman.c new file mode 100644 index 0000000000..36e5502836 --- /dev/null +++ b/thirdparty/libwebp/utils/huffman.c @@ -0,0 +1,205 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Urvang Joshi (urvang@google.com) + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include "./huffman.h" +#include "./utils.h" +#include "../webp/format_constants.h" + +// Huffman data read via DecodeImageStream is represented in two (red and green) +// bytes. +#define MAX_HTREE_GROUPS 0x10000 + +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; +} + +void VP8LHtreeGroupsFree(HTreeGroup* const htree_groups) { + if (htree_groups != NULL) { + WebPSafeFree(htree_groups); + } +} + +// 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; +} + +// 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); +} + +// 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 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(root_table != NULL); + assert(root_bits > 0); + + // Build histogram of code lengths. + for (symbol = 0; symbol < code_lengths_size; ++symbol) { + if (code_lengths[symbol] > MAX_ALLOWED_CODE_LENGTH) { + return 0; + } + ++count[code_lengths[symbol]]; + } + + // Error, all code lengths are zeros. + if (count[0] == code_lengths_size) { + return 0; + } + + // 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; + } + offset[len + 1] = offset[len] + count[len]; + } + + sorted = (int*)WebPSafeMalloc(code_lengths_size, sizeof(*sorted)); + if (sorted == NULL) { + return 0; + } + + // 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) { + sorted[offset[symbol_code_length]++] = symbol; + } + } + + // 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; + } + + { + 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); + } + } + + // 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); + } + } + + // Check if tree is full. + if (num_nodes != 2 * offset[MAX_ALLOWED_CODE_LENGTH] - 1) { + WebPSafeFree(sorted); + return 0; + } + } + + WebPSafeFree(sorted); + return total_size; +} diff --git a/thirdparty/libwebp/utils/huffman.h b/thirdparty/libwebp/utils/huffman.h new file mode 100644 index 0000000000..c6dd6aaa45 --- /dev/null +++ b/thirdparty/libwebp/utils/huffman.h @@ -0,0 +1,88 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Urvang Joshi (urvang@google.com) + +#ifndef WEBP_UTILS_HUFFMAN_H_ +#define WEBP_UTILS_HUFFMAN_H_ + +#include <assert.h> +#include "../webp/format_constants.h" +#include "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#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 lookup table entry +typedef struct { + uint8_t bits; // number of bits used for this symbol + uint16_t value; // symbol value or table offset +} HuffmanCode; + +// 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; + +#define HUFFMAN_PACKED_BITS 6 +#define HUFFMAN_PACKED_TABLE_SIZE (1u << HUFFMAN_PACKED_BITS) + +// 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]; +}; + +// Creates the instance of HTreeGroup with specified number of tree-groups. +HTreeGroup* VP8LHtreeGroupsNew(int num_htree_groups); + +// 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); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // WEBP_UTILS_HUFFMAN_H_ diff --git a/thirdparty/libwebp/utils/huffman_encode.c b/thirdparty/libwebp/utils/huffman_encode.c new file mode 100644 index 0000000000..4e5ef6b447 --- /dev/null +++ b/thirdparty/libwebp/utils/huffman_encode.c @@ -0,0 +1,417 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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) +// +// Entropy encoding (Huffman) for webp lossless. + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include "./huffman_encode.h" +#include "./utils.h" +#include "../webp/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 +// 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; // 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. + { + // 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. + uint32_t 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. + { + 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)) { + uint32_t k; + // The stride must end, collapse what we have, if we have enough (4). + uint32_t 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; + } + } + } + } +} + +// 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 { + assert(t1->value_ != t2->value_); + return (t1->value_ < t2->value_) ? -1 : 1; + } +} + +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 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; + int tree_size_orig = 0; + int i; + + for (i = 0; i < histogram_size; ++i) { + if (histogram[i] != 0) { + ++tree_size_orig; + } + } + + 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 + // 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 uint32_t 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. + 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_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; + } + } + } +} + +// ----------------------------------------------------------------------------- +// 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 + +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(huff_code); +} diff --git a/thirdparty/libwebp/utils/huffman_encode.h b/thirdparty/libwebp/utils/huffman_encode.h new file mode 100644 index 0000000000..a157165148 --- /dev/null +++ b/thirdparty/libwebp/utils/huffman_encode.h @@ -0,0 +1,60 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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) +// +// Entropy encoding (Huffman) for webp lossless + +#ifndef WEBP_UTILS_HUFFMAN_ENCODE_H_ +#define WEBP_UTILS_HUFFMAN_ENCODE_H_ + +#include "../webp/types.h" + +#ifdef __cplusplus +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; + +// 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. +// '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); + +#ifdef __cplusplus +} +#endif + +#endif // WEBP_UTILS_HUFFMAN_ENCODE_H_ diff --git a/thirdparty/libwebp/utils/quant_levels.c b/thirdparty/libwebp/utils/quant_levels.c new file mode 100644 index 0000000000..d7c8aab922 --- /dev/null +++ b/thirdparty/libwebp/utils/quant_levels.c @@ -0,0 +1,140 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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]). +// 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" + +#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; +} + diff --git a/thirdparty/libwebp/utils/quant_levels.h b/thirdparty/libwebp/utils/quant_levels.h new file mode 100644 index 0000000000..1cb5a32cae --- /dev/null +++ b/thirdparty/libwebp/utils/quant_levels.h @@ -0,0 +1,36 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Vikas Arora (vikasa@google.com) + +#ifndef WEBP_UTILS_QUANT_LEVELS_H_ +#define WEBP_UTILS_QUANT_LEVELS_H_ + +#include <stdlib.h> + +#include "../webp/types.h" + +#ifdef __cplusplus +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); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_QUANT_LEVELS_H_ */ diff --git a/thirdparty/libwebp/utils/quant_levels_dec.c b/thirdparty/libwebp/utils/quant_levels_dec.c new file mode 100644 index 0000000000..ee0a3fe127 --- /dev/null +++ b/thirdparty/libwebp/utils/quant_levels_dec.c @@ -0,0 +1,284 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Implement gradient smoothing: we replace a current alpha value by its +// surrounding average if it's close enough (that is: the change will be less +// than the minimum distance between two quantized level). +// We use sliding window for computing the 2d moving average. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./quant_levels_dec.h" + +#include <string.h> // for memset + +#include "./utils.h" + +// #define USE_DITHERING // uncomment to enable ordered dithering (not vital) + +#define FIX 16 // fix-point precision for averaging +#define LFIX 2 // extra precision for look-up table +#define LUT_SIZE ((1 << (8 + LFIX)) - 1) // look-up table size + +#if defined(USE_DITHERING) + +#define DFIX 4 // extra precision for ordered dithering +#define DSIZE 4 // dithering size (must be a power of two) +// cf. http://en.wikipedia.org/wiki/Ordered_dithering +static const uint8_t kOrderedDither[DSIZE][DSIZE] = { + { 0, 8, 2, 10 }, // coefficients are in DFIX fixed-point precision + { 12, 4, 14, 6 }, + { 3, 11, 1, 9 }, + { 15, 7, 13, 5 } +}; + +#else +#define DFIX 0 +#endif + +typedef struct { + int width_, height_; // dimension + int stride_; // stride in bytes + int row_; // current input row being processed + uint8_t* src_; // input pointer + uint8_t* dst_; // output pointer + + int radius_; // filter radius (=delay) + int scale_; // normalization factor, in FIX bits precision + + void* mem_; // all memory + + // various scratch buffers + uint16_t* start_; + uint16_t* cur_; + uint16_t* end_; + uint16_t* top_; + uint16_t* average_; + + // input levels distribution + int num_levels_; // number of quantized levels + int min_, max_; // min and max level values + int min_level_dist_; // smallest distance between two consecutive levels + + int16_t* correction_; // size = 1 + 2*LUT_SIZE -> ~4k memory +} SmoothParams; + +//------------------------------------------------------------------------------ + +#define CLIP_MASK (int)(~0U << (8 + DFIX)) +static WEBP_INLINE uint8_t clip_8b(int v) { + return (!(v & CLIP_MASK)) ? (uint8_t)(v >> DFIX) : (v < 0) ? 0u : 255u; +} + +// vertical accumulation +static void VFilter(SmoothParams* const p) { + const uint8_t* src = p->src_; + const int w = p->width_; + uint16_t* const cur = p->cur_; + const uint16_t* const top = p->top_; + uint16_t* const out = p->end_; + uint16_t sum = 0; // all arithmetic is modulo 16bit + int x; + + for (x = 0; x < w; ++x) { + uint16_t new_value; + sum += src[x]; + new_value = top[x] + sum; + out[x] = new_value - cur[x]; // vertical sum of 'r' pixels. + cur[x] = new_value; + } + // move input pointers one row down + p->top_ = p->cur_; + p->cur_ += w; + if (p->cur_ == p->end_) p->cur_ = p->start_; // roll-over + // We replicate edges, as it's somewhat easier as a boundary condition. + // That's why we don't update the 'src' pointer on top/bottom area: + if (p->row_ >= 0 && p->row_ < p->height_ - 1) { + p->src_ += p->stride_; + } +} + +// horizontal accumulation. We use mirror replication of missing pixels, as it's +// a little easier to implement (surprisingly). +static void HFilter(SmoothParams* const p) { + const uint16_t* const in = p->end_; + uint16_t* const out = p->average_; + const uint32_t scale = p->scale_; + const int w = p->width_; + const int r = p->radius_; + + int x; + for (x = 0; x <= r; ++x) { // left mirroring + const uint16_t delta = in[x + r - 1] + in[r - x]; + out[x] = (delta * scale) >> FIX; + } + for (; x < w - r; ++x) { // bulk middle run + const uint16_t delta = in[x + r] - in[x - r - 1]; + out[x] = (delta * scale) >> FIX; + } + for (; x < w; ++x) { // right mirroring + const uint16_t delta = + 2 * in[w - 1] - in[2 * w - 2 - r - x] - in[x - r - 1]; + out[x] = (delta * scale) >> FIX; + } +} + +// emit one filtered output row +static void ApplyFilter(SmoothParams* const p) { + const uint16_t* const average = p->average_; + const int w = p->width_; + const int16_t* const correction = p->correction_; +#if defined(USE_DITHERING) + const uint8_t* const dither = kOrderedDither[p->row_ % DSIZE]; +#endif + uint8_t* const dst = p->dst_; + int x; + for (x = 0; x < w; ++x) { + const int v = dst[x]; + if (v < p->max_ && v > p->min_) { + const int c = (v << DFIX) + correction[average[x] - (v << LFIX)]; +#if defined(USE_DITHERING) + dst[x] = clip_8b(c + dither[x % DSIZE]); +#else + dst[x] = clip_8b(c); +#endif + } + } + p->dst_ += p->stride_; // advance output pointer +} + +//------------------------------------------------------------------------------ +// Initialize correction table + +static void InitCorrectionLUT(int16_t* const lut, int min_dist) { + // The correction curve is: + // f(x) = x for x <= threshold2 + // f(x) = 0 for x >= threshold1 + // and a linear interpolation for range x=[threshold2, threshold1] + // (along with f(-x) = -f(x) symmetry). + // Note that: threshold2 = 3/4 * threshold1 + const int threshold1 = min_dist << LFIX; + const int threshold2 = (3 * threshold1) >> 2; + const int max_threshold = threshold2 << DFIX; + const int delta = threshold1 - threshold2; + int i; + for (i = 1; i <= LUT_SIZE; ++i) { + int c = (i <= threshold2) ? (i << DFIX) + : (i < threshold1) ? max_threshold * (threshold1 - i) / delta + : 0; + c >>= LFIX; + lut[+i] = +c; + lut[-i] = -c; + } + lut[0] = 0; +} + +static void CountLevels(SmoothParams* const p) { + int i, j, last_level; + uint8_t used_levels[256] = { 0 }; + const uint8_t* data = p->src_; + p->min_ = 255; + p->max_ = 0; + for (j = 0; j < p->height_; ++j) { + for (i = 0; i < p->width_; ++i) { + const int v = data[i]; + if (v < p->min_) p->min_ = v; + if (v > p->max_) p->max_ = v; + used_levels[v] = 1; + } + data += p->stride_; + } + // Compute the mininum distance between two non-zero levels. + p->min_level_dist_ = p->max_ - p->min_; + last_level = -1; + for (i = 0; i < 256; ++i) { + if (used_levels[i]) { + ++p->num_levels_; + if (last_level >= 0) { + const int level_dist = i - last_level; + if (level_dist < p->min_level_dist_) { + p->min_level_dist_ = level_dist; + } + } + last_level = i; + } + } +} + +// Initialize all params. +static int InitParams(uint8_t* const data, int width, int height, int stride, + int radius, SmoothParams* const p) { + const int R = 2 * radius + 1; // total size of the kernel + + const size_t size_scratch_m = (R + 1) * width * sizeof(*p->start_); + const size_t size_m = width * sizeof(*p->average_); + const size_t size_lut = (1 + 2 * LUT_SIZE) * sizeof(*p->correction_); + const size_t total_size = size_scratch_m + size_m + size_lut; + uint8_t* mem = (uint8_t*)WebPSafeMalloc(1U, total_size); + + if (mem == NULL) return 0; + p->mem_ = (void*)mem; + + p->start_ = (uint16_t*)mem; + p->cur_ = p->start_; + p->end_ = p->start_ + R * width; + p->top_ = p->end_ - width; + memset(p->top_, 0, width * sizeof(*p->top_)); + mem += size_scratch_m; + + p->average_ = (uint16_t*)mem; + mem += size_m; + + p->width_ = width; + p->height_ = height; + p->stride_ = stride; + p->src_ = data; + p->dst_ = data; + p->radius_ = radius; + p->scale_ = (1 << (FIX + LFIX)) / (R * R); // normalization constant + p->row_ = -radius; + + // analyze the input distribution so we can best-fit the threshold + CountLevels(p); + + // correction table + p->correction_ = ((int16_t*)mem) + LUT_SIZE; + InitCorrectionLUT(p->correction_, p->min_level_dist_); + + return 1; +} + +static void CleanupParams(SmoothParams* const p) { + WebPSafeFree(p->mem_); +} + +int WebPDequantizeLevels(uint8_t* const data, int width, int height, int stride, + int strength) { + const int radius = 4 * strength / 100; + if (strength < 0 || strength > 100) return 0; + if (data == NULL || width <= 0 || height <= 0) return 0; // bad params + if (radius > 0) { + SmoothParams p; + memset(&p, 0, sizeof(p)); + if (!InitParams(data, width, height, stride, radius, &p)) return 0; + if (p.num_levels_ > 2) { + for (; p.row_ < p.height_; ++p.row_) { + VFilter(&p); // accumulate average of input + // Need to wait few rows in order to prime the filter, + // before emitting some output. + if (p.row_ >= p.radius_) { + HFilter(&p); + ApplyFilter(&p); + } + } + } + CleanupParams(&p); + } + return 1; +} diff --git a/thirdparty/libwebp/utils/quant_levels_dec.h b/thirdparty/libwebp/utils/quant_levels_dec.h new file mode 100644 index 0000000000..59a13495d3 --- /dev/null +++ b/thirdparty/libwebp/utils/quant_levels_dec.h @@ -0,0 +1,35 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// 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 de-quantization utility +// +// Author: Vikas Arora (vikasa@google.com) + +#ifndef WEBP_UTILS_QUANT_LEVELS_DEC_H_ +#define WEBP_UTILS_QUANT_LEVELS_DEC_H_ + +#include "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// Apply post-processing to input 'data' of size 'width'x'height' assuming that +// the source was quantized to a reduced number of levels. 'stride' is in bytes. +// Strength is in [0..100] and controls the amount of dithering applied. +// Returns false in case of error (data is NULL, invalid parameters, +// malloc failure, ...). +int WebPDequantizeLevels(uint8_t* const data, int width, int height, int stride, + int strength); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_QUANT_LEVELS_DEC_H_ */ diff --git a/thirdparty/libwebp/utils/random.c b/thirdparty/libwebp/utils/random.c new file mode 100644 index 0000000000..24e96ad648 --- /dev/null +++ b/thirdparty/libwebp/utils/random.c @@ -0,0 +1,43 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Pseudo-random utilities +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <string.h> +#include "./random.h" + +//------------------------------------------------------------------------------ + +// 31b-range values +static const uint32_t kRandomTable[VP8_RANDOM_TABLE_SIZE] = { + 0x0de15230, 0x03b31886, 0x775faccb, 0x1c88626a, 0x68385c55, 0x14b3b828, + 0x4a85fef8, 0x49ddb84b, 0x64fcf397, 0x5c550289, 0x4a290000, 0x0d7ec1da, + 0x5940b7ab, 0x5492577d, 0x4e19ca72, 0x38d38c69, 0x0c01ee65, 0x32a1755f, + 0x5437f652, 0x5abb2c32, 0x0faa57b1, 0x73f533e7, 0x685feeda, 0x7563cce2, + 0x6e990e83, 0x4730a7ed, 0x4fc0d9c6, 0x496b153c, 0x4f1403fa, 0x541afb0c, + 0x73990b32, 0x26d7cb1c, 0x6fcc3706, 0x2cbb77d8, 0x75762f2a, 0x6425ccdd, + 0x24b35461, 0x0a7d8715, 0x220414a8, 0x141ebf67, 0x56b41583, 0x73e502e3, + 0x44cab16f, 0x28264d42, 0x73baaefb, 0x0a50ebed, 0x1d6ab6fb, 0x0d3ad40b, + 0x35db3b68, 0x2b081e83, 0x77ce6b95, 0x5181e5f0, 0x78853bbc, 0x009f9494, + 0x27e5ed3c +}; + +void VP8InitRandom(VP8Random* const rg, float dithering) { + memcpy(rg->tab_, kRandomTable, sizeof(rg->tab_)); + rg->index1_ = 0; + rg->index2_ = 31; + rg->amp_ = (dithering < 0.0) ? 0 + : (dithering > 1.0) ? (1 << VP8_RANDOM_DITHER_FIX) + : (uint32_t)((1 << VP8_RANDOM_DITHER_FIX) * dithering); +} + +//------------------------------------------------------------------------------ + diff --git a/thirdparty/libwebp/utils/random.h b/thirdparty/libwebp/utils/random.h new file mode 100644 index 0000000000..c392a615ca --- /dev/null +++ b/thirdparty/libwebp/utils/random.h @@ -0,0 +1,63 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Pseudo-random utilities +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_UTILS_RANDOM_H_ +#define WEBP_UTILS_RANDOM_H_ + +#include <assert.h> +#include "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define VP8_RANDOM_DITHER_FIX 8 // fixed-point precision for dithering +#define VP8_RANDOM_TABLE_SIZE 55 + +typedef struct { + int index1_, index2_; + uint32_t tab_[VP8_RANDOM_TABLE_SIZE]; + int amp_; +} VP8Random; + +// Initializes random generator with an amplitude 'dithering' in range [0..1]. +void VP8InitRandom(VP8Random* const rg, float dithering); + +// Returns a centered pseudo-random number with 'num_bits' amplitude. +// (uses D.Knuth's Difference-based random generator). +// 'amp' is in VP8_RANDOM_DITHER_FIX fixed-point precision. +static WEBP_INLINE int VP8RandomBits2(VP8Random* const rg, int num_bits, + int amp) { + int diff; + assert(num_bits + VP8_RANDOM_DITHER_FIX <= 31); + diff = rg->tab_[rg->index1_] - rg->tab_[rg->index2_]; + if (diff < 0) diff += (1u << 31); + rg->tab_[rg->index1_] = diff; + if (++rg->index1_ == VP8_RANDOM_TABLE_SIZE) rg->index1_ = 0; + if (++rg->index2_ == VP8_RANDOM_TABLE_SIZE) rg->index2_ = 0; + // sign-extend, 0-center + diff = (int)((uint32_t)diff << 1) >> (32 - num_bits); + diff = (diff * amp) >> VP8_RANDOM_DITHER_FIX; // restrict range + diff += 1 << (num_bits - 1); // shift back to 0.5-center + return diff; +} + +static WEBP_INLINE int VP8RandomBits(VP8Random* const rg, int num_bits) { + return VP8RandomBits2(rg, num_bits, rg->amp_); +} + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_RANDOM_H_ */ diff --git a/thirdparty/libwebp/utils/rescaler.c b/thirdparty/libwebp/utils/rescaler.c new file mode 100644 index 0000000000..00c9300bfb --- /dev/null +++ b/thirdparty/libwebp/utils/rescaler.c @@ -0,0 +1,142 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include "../dsp/dsp.h" +#include "./rescaler.h" + +//------------------------------------------------------------------------------ + +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, 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; + wrk->x_sub = wrk->x_expand ? (x_add - 1) : x_sub; + 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)); + + WebPRescalerDspInit(); +} + +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; + + // if width is unspecified, scale original proportionally to height ratio. + if (width == 0) { + width = (src_width * height + src_height / 2) / src_height; + } + // 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; + } +} + +//------------------------------------------------------------------------------ +// 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 && !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; + } + return total_imported; +} + +int WebPRescalerExport(WebPRescaler* const rescaler) { + int total_exported = 0; + while (WebPRescalerHasPendingOutput(rescaler)) { + WebPRescalerExportRow(rescaler); + ++total_exported; + } + return total_exported; +} + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/utils/rescaler.h b/thirdparty/libwebp/utils/rescaler.h new file mode 100644 index 0000000000..98b01a76d0 --- /dev/null +++ b/thirdparty/libwebp/utils/rescaler.h @@ -0,0 +1,101 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_UTILS_RESCALER_H_ +#define WEBP_UTILS_RESCALER_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#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 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 + 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 + 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; + rescaler_t* irow, *frow; // work buffer +}; + +// Initialize a rescaler given scratch area 'work' and dimensions of src & dst. +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, + 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); + +// 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); + +// 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 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); +} + +// 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); +} + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_RESCALER_H_ */ diff --git a/thirdparty/libwebp/utils/thread.c b/thirdparty/libwebp/utils/thread.c new file mode 100644 index 0000000000..93f7622797 --- /dev/null +++ b/thirdparty/libwebp/utils/thread.c @@ -0,0 +1,358 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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) + +#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 _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 + +#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) + +//------------------------------------------------------------------------------ +// simplistic pthread emulation layer + +#include <process.h> + +// _beginthreadex requires __stdcall +#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; +} + +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; +#if _WIN32_WINNT >= 0x0600 // Windows Vista / Server 2008 or greater + InitializeCriticalSectionEx(mutex, 0 /*dwSpinCount*/, 0 /*Flags*/); +#else + InitializeCriticalSection(mutex); +#endif + 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; +#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); + if (condition->waiting_sem_ == NULL || + condition->received_sem_ == NULL || + condition->signal_event_ == NULL) { + 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_); + // 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); + } +#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)) + 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); +#endif + return !ok; +} + +#else // !_WIN32 +# define THREADFN void* +# define THREAD_RETURN(val) val +#endif // _WIN32 + +//------------------------------------------------------------------------------ + +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->impl_->mutex_); + while (worker->status_ == OK) { // wait in idling mode + pthread_cond_wait(&worker->impl_->condition_, &worker->impl_->mutex_); + } + if (worker->status_ == WORK) { + 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->impl_->condition_); + pthread_mutex_unlock(&worker->impl_->mutex_); + } + return THREAD_RETURN(NULL); // Thread is finished +} + +// main thread state control +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->impl_->mutex_); +} + +#endif // WEBP_USE_THREAD + +//------------------------------------------------------------------------------ + +static void Init(WebPWorker* const worker) { + memset(worker, 0, sizeof(*worker)); + worker->status_ = NOT_OK; +} + +static int Sync(WebPWorker* const worker) { +#ifdef WEBP_USE_THREAD + ChangeState(worker, OK); +#endif + assert(worker->status_ <= OK); + return !worker->had_error; +} + +static int Reset(WebPWorker* const worker) { + int ok = 1; + worker->had_error = 0; + if (worker->status_ < OK) { +#ifdef WEBP_USE_THREAD + worker->impl_ = (WebPWorkerImpl*)WebPSafeCalloc(1, sizeof(*worker->impl_)); + if (worker->impl_ == NULL) { + return 0; + } + 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->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 = Sync(worker); + } + assert(!ok || (worker->status_ == OK)); + return ok; +} + +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 + ChangeState(worker, WORK); +#else + Execute(worker); +#endif +} + +static void End(WebPWorker* const worker) { +#ifdef WEBP_USE_THREAD + 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; + assert(worker->impl_ == NULL); +#endif + assert(worker->status_ == NOT_OK); +} + +//------------------------------------------------------------------------------ + +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/thirdparty/libwebp/utils/thread.h b/thirdparty/libwebp/utils/thread.h new file mode 100644 index 0000000000..8408311855 --- /dev/null +++ b/thirdparty/libwebp/utils/thread.h @@ -0,0 +1,93 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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) + +#ifndef WEBP_UTILS_THREAD_H_ +#define WEBP_UTILS_THREAD_H_ + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// 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*); + +// Platform-dependent implementation details for the worker. +typedef struct WebPWorkerImpl WebPWorkerImpl; + +// Synchronization object used to launch job in the worker thread +typedef struct { + WebPWorkerImpl* impl_; + 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; + +// 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); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_THREAD_H_ */ diff --git a/thirdparty/libwebp/utils/utils.c b/thirdparty/libwebp/utils/utils.c new file mode 100644 index 0000000000..2602ca3c9f --- /dev/null +++ b/thirdparty/libwebp/utils/utils.c @@ -0,0 +1,305 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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) + +#include <stdlib.h> +#include <string.h> // for memcpy() +#include "../webp/decode.h" +#include "../webp/encode.h" +#include "../webp/format_constants.h" // for MAX_PALETTE_SIZE +#include "./utils.h" + +// 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 + +#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) { + 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) { + 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); +} + +//------------------------------------------------------------------------------ + +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); +} + +//------------------------------------------------------------------------------ + +#define MAX_COLOR_COUNT MAX_PALETTE_SIZE +#define COLOR_HASH_SIZE (MAX_COLOR_COUNT * 4) +#define COLOR_HASH_RIGHT_SHIFT 22 // 32 - log2(COLOR_HASH_SIZE). + +int WebPGetColorPalette(const WebPPicture* const pic, uint32_t* const palette) { + int i; + int x, y; + int num_colors = 0; + uint8_t in_use[COLOR_HASH_SIZE] = { 0 }; + uint32_t colors[COLOR_HASH_SIZE]; + static const uint32_t kHashMul = 0x1e35a7bdU; + 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] + assert(pic != NULL); + assert(pic->use_argb); + + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { + int key; + if (argb[x] == last_pix) { + continue; + } + last_pix = argb[x]; + key = (kHashMul * last_pix) >> COLOR_HASH_RIGHT_SHIFT; + while (1) { + if (!in_use[key]) { + colors[key] = last_pix; + in_use[key] = 1; + ++num_colors; + if (num_colors > MAX_COLOR_COUNT) { + return MAX_COLOR_COUNT + 1; // Exact count not needed. + } + break; + } else if (colors[key] == last_pix) { + break; // The color is already there. + } else { + // Some other color sits here, so do linear conflict resolution. + ++key; + key &= (COLOR_HASH_SIZE - 1); // Key mask. + } + } + } + argb += pic->argb_stride; + } + + if (palette != NULL) { // Fill the colors into palette. + num_colors = 0; + for (i = 0; i < COLOR_HASH_SIZE; ++i) { + if (in_use[i]) { + palette[num_colors] = colors[i]; + ++num_colors; + } + } + } + return num_colors; +} + +#undef MAX_COLOR_COUNT +#undef COLOR_HASH_SIZE +#undef COLOR_HASH_RIGHT_SHIFT + +//------------------------------------------------------------------------------ diff --git a/thirdparty/libwebp/utils/utils.h b/thirdparty/libwebp/utils/utils.h new file mode 100644 index 0000000000..e0a81126df --- /dev/null +++ b/thirdparty/libwebp/utils/utils.h @@ -0,0 +1,182 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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 +// +// Authors: Skal (pascal.massimino@gmail.com) +// Urvang (urvang@google.com) + +#ifndef WEBP_UTILS_UTILS_H_ +#define WEBP_UTILS_UTILS_H_ + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include <assert.h> + +#include "../dsp/dsp.h" +#include "../webp/types.h" + +#ifdef __cplusplus +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. +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. +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) + +#if defined(WEBP_FORCE_ALIGNED) +#include <string.h> +// memcpy() is the safe way of moving potentially unaligned 32b memory. +static WEBP_INLINE uint32_t WebPMemToUint32(const uint8_t* const ptr) { + uint32_t A; + memcpy(&A, (const int*)ptr, sizeof(A)); + return A; +} +static WEBP_INLINE void WebPUint32ToMem(uint8_t* const ptr, uint32_t val) { + memcpy(ptr, &val, sizeof(val)); +} +#else +static WEBP_UBSAN_IGNORE_UNDEF WEBP_INLINE +uint32_t WebPMemToUint32(const uint8_t* const ptr) { + return *(const uint32_t*)ptr; +} +static WEBP_UBSAN_IGNORE_UNDEF WEBP_INLINE +void WebPUint32ToMem(uint8_t* const ptr, uint32_t val) { + *(uint32_t*)ptr = val; +} +#endif + +//------------------------------------------------------------------------------ +// 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); + +//------------------------------------------------------------------------------ +// Unique colors. + +// Returns count of unique colors in 'pic', assuming pic->use_argb is true. +// If the unique color count is more than MAX_COLOR_COUNT, returns +// MAX_COLOR_COUNT+1. +// If 'palette' is not NULL and number of unique colors is less than or equal to +// MAX_COLOR_COUNT, also outputs the actual unique colors into 'palette'. +// Note: 'palette' is assumed to be an array already allocated with at least +// MAX_COLOR_COUNT elements. +WEBP_EXTERN(int) WebPGetColorPalette(const struct WebPPicture* const pic, + uint32_t* const palette); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_UTILS_H_ */ diff --git a/thirdparty/libwebp/webp/config.h b/thirdparty/libwebp/webp/config.h new file mode 100644 index 0000000000..0ce1c7064d --- /dev/null +++ b/thirdparty/libwebp/webp/config.h @@ -0,0 +1,150 @@ +/* src/webp/config.h.in. Generated from configure.ac by autoheader. */ + +/* Define if building universal (internal helper macro) */ +#undef AC_APPLE_UNIVERSAL_BUILD + +/* Set to 1 if __builtin_bswap16 is available */ +#undef HAVE_BUILTIN_BSWAP16 + +/* Set to 1 if __builtin_bswap32 is available */ +#undef HAVE_BUILTIN_BSWAP32 + +/* Set to 1 if __builtin_bswap64 is available */ +#undef HAVE_BUILTIN_BSWAP64 + +/* Define to 1 if you have the <dlfcn.h> header file. */ +#undef HAVE_DLFCN_H + +/* Define to 1 if you have the <GLUT/glut.h> header file. */ +#undef HAVE_GLUT_GLUT_H + +/* Define to 1 if you have the <GL/glut.h> header file. */ +#undef HAVE_GL_GLUT_H + +/* Define to 1 if you have the <inttypes.h> header file. */ +#undef HAVE_INTTYPES_H + +/* Define to 1 if you have the <memory.h> header file. */ +#undef HAVE_MEMORY_H + +/* Define to 1 if you have the <OpenGL/glut.h> header file. */ +#undef HAVE_OPENGL_GLUT_H + +/* Have PTHREAD_PRIO_INHERIT. */ +#undef HAVE_PTHREAD_PRIO_INHERIT + +/* Define to 1 if you have the <shlwapi.h> header file. */ +#undef HAVE_SHLWAPI_H + +/* Define to 1 if you have the <stdint.h> header file. */ +#undef HAVE_STDINT_H + +/* Define to 1 if you have the <stdlib.h> header file. */ +#undef HAVE_STDLIB_H + +/* Define to 1 if you have the <strings.h> header file. */ +#undef HAVE_STRINGS_H + +/* Define to 1 if you have the <string.h> header file. */ +#undef HAVE_STRING_H + +/* Define to 1 if you have the <sys/stat.h> header file. */ +#undef HAVE_SYS_STAT_H + +/* Define to 1 if you have the <sys/types.h> header file. */ +#undef HAVE_SYS_TYPES_H + +/* Define to 1 if you have the <unistd.h> header file. */ +#undef HAVE_UNISTD_H + +/* Define to 1 if you have the <wincodec.h> header file. */ +#undef HAVE_WINCODEC_H + +/* Define to 1 if you have the <windows.h> header file. */ +#undef HAVE_WINDOWS_H + +/* Define to the sub-directory in which libtool stores uninstalled libraries. + */ +#undef LT_OBJDIR + +/* Name of package */ +#undef PACKAGE + +/* Define to the address where bug reports for this package should be sent. */ +#undef PACKAGE_BUGREPORT + +/* Define to the full name of this package. */ +#undef PACKAGE_NAME + +/* Define to the full name and version of this package. */ +#undef PACKAGE_STRING + +/* Define to the one symbol short name of this package. */ +#undef PACKAGE_TARNAME + +/* Define to the home page for this package. */ +#undef PACKAGE_URL + +/* Define to the version of this package. */ +#undef PACKAGE_VERSION + +/* Define to necessary symbol if this constant uses a non-standard name on + your system. */ +#undef PTHREAD_CREATE_JOINABLE + +/* Define to 1 if you have the ANSI C header files. */ +#undef STDC_HEADERS + +/* Version number of package */ +#undef VERSION + +/* Enable experimental code */ +#undef WEBP_EXPERIMENTAL_FEATURES + +/* Define to 1 to force aligned memory operations */ +#undef WEBP_FORCE_ALIGNED + +/* Set to 1 if AVX2 is supported */ +#undef WEBP_HAVE_AVX2 + +/* Set to 1 if GIF library is installed */ +#undef WEBP_HAVE_GIF + +/* Set to 1 if OpenGL is supported */ +#undef WEBP_HAVE_GL + +/* Set to 1 if JPEG library is installed */ +#undef WEBP_HAVE_JPEG + +/* Set to 1 if NEON is supported */ +#undef WEBP_HAVE_NEON + +/* Set to 1 if runtime detection of NEON is enabled */ +#undef WEBP_HAVE_NEON_RTCD + +/* Set to 1 if PNG library is installed */ +#undef WEBP_HAVE_PNG + +/* Set to 1 if SSE2 is supported */ +#undef WEBP_HAVE_SSE2 + +/* Set to 1 if SSE4.1 is supported */ +#undef WEBP_HAVE_SSE41 + +/* Set to 1 if TIFF library is installed */ +#undef WEBP_HAVE_TIFF + +/* Undefine this to disable thread support. */ +#undef WEBP_USE_THREAD + +/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most + significant byte first (like Motorola and SPARC, unlike Intel). */ +#if defined AC_APPLE_UNIVERSAL_BUILD +# if defined __BIG_ENDIAN__ +# define WORDS_BIGENDIAN 1 +# endif +#else +# ifndef WORDS_BIGENDIAN +# undef WORDS_BIGENDIAN +# endif +#endif diff --git a/thirdparty/libwebp/webp/decode.h b/thirdparty/libwebp/webp/decode.h new file mode 100644 index 0000000000..7a3bed93a4 --- /dev/null +++ b/thirdparty/libwebp/webp/decode.h @@ -0,0 +1,493 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_WEBP_DECODE_H_ +#define WEBP_WEBP_DECODE_H_ + +#include "./types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define WEBP_DECODER_ABI_VERSION 0x0208 // 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. +WEBP_EXTERN(int) WebPGetDecoderVersion(void); + +// Retrieve basic header information: width, height. +// This function will also validate the header, returning true on success, +// false otherwise. '*width' and '*height' are only valid on successful return. +// 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 WebPFree(). +// 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 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. +// (*) 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); + +// 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 +// 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. +// 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) { + 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. + +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. +}; + +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 + 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 +}; + +// Output buffer +struct WebPDecBuffer { + WEBP_CSP_MODE colorspace; // Colorspace. + int width, height; // Dimensions. + int is_external_memory; // If non-zero, 'internal_memory' pointer is not + // used. If value is '2' or more, the external + // memory is considered 'slow' and multiple + // read/write will be avoided. + 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 0). Should not be used + // externally, but accessed via the buffer union. +}; + +// 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 VP8StatusCode { + 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); + +// 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 +// not set to 0. 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); + +// 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'. +// 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 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, + 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_upsampling = 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 +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( + const uint8_t*, size_t, WebPBitstreamFeatures*, int); + +// Retrieve features from the bitstream. The *features structure is filled +// with information gathered from the bitstream. +// 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) { + return WebPGetFeaturesInternal(data, data_size, features, + WEBP_DECODER_ABI_VERSION); +} + +// Decoding options +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_ + 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 + int dithering_strength; // dithering strength (0=Off, 100=full) + int flip; // flip output vertically + int alpha_dithering_strength; // alpha dithering strength in [0..100] + + uint32_t pad[5]; // padding for later use +}; + +// Main object storing the configuration for advanced decoding. +struct WebPDecoderConfig { + WebPBitstreamFeatures input; // Immutable bitstream features (optional) + WebPDecBuffer output; // Output buffer (can point to external mem) + WebPDecoderOptions options; // Decoding options +}; + +// 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. If 'config' is not NULL, it must outlive the WebPIDecoder object +// as some references to its fields will be used. No internal copy of 'config' +// is made. +// 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, if available). +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). Note that 'config' cannot be NULL. +WEBP_EXTERN(VP8StatusCode) WebPDecode(const uint8_t* data, size_t data_size, + WebPDecoderConfig* config); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_WEBP_DECODE_H_ */ diff --git a/thirdparty/libwebp/webp/demux.h b/thirdparty/libwebp/webp/demux.h new file mode 100644 index 0000000000..454f6914b2 --- /dev/null +++ b/thirdparty/libwebp/webp/demux.h @@ -0,0 +1,358 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Demux API. +// Enables extraction of image and extended format data from WebP files. + +// Code Example: Demuxing WebP data to extract all the frames, ICC profile +// and EXIF/XMP metadata. +/* + WebPDemuxer* demux = WebPDemux(&webp_data); + + uint32_t width = WebPDemuxGetI(demux, WEBP_FF_CANVAS_WIDTH); + uint32_t height = WebPDemuxGetI(demux, WEBP_FF_CANVAS_HEIGHT); + // ... (Get information about the features present in the WebP file). + uint32_t flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS); + + // ... (Iterate over all frames). + WebPIterator iter; + if (WebPDemuxGetFrame(demux, 1, &iter)) { + do { + // ... (Consume 'iter'; e.g. Decode 'iter.fragment' with WebPDecode(), + // ... and get other frame properties like width, height, offsets etc. + // ... see 'struct WebPIterator' below for more info). + } while (WebPDemuxNextFrame(&iter)); + WebPDemuxReleaseIterator(&iter); + } + + // ... (Extract metadata). + WebPChunkIterator chunk_iter; + if (flags & ICCP_FLAG) WebPDemuxGetChunk(demux, "ICCP", 1, &chunk_iter); + // ... (Consume the ICC profile in 'chunk_iter.chunk'). + WebPDemuxReleaseChunkIterator(&chunk_iter); + if (flags & EXIF_FLAG) WebPDemuxGetChunk(demux, "EXIF", 1, &chunk_iter); + // ... (Consume the EXIF metadata in 'chunk_iter.chunk'). + WebPDemuxReleaseChunkIterator(&chunk_iter); + if (flags & XMP_FLAG) WebPDemuxGetChunk(demux, "XMP ", 1, &chunk_iter); + // ... (Consume the XMP metadata in 'chunk_iter.chunk'). + WebPDemuxReleaseChunkIterator(&chunk_iter); + WebPDemuxDelete(demux); +*/ + +#ifndef WEBP_WEBP_DEMUX_H_ +#define WEBP_WEBP_DEMUX_H_ + +#include "./decode.h" // for WEBP_CSP_MODE +#include "./mux_types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define WEBP_DEMUX_ABI_VERSION 0x0107 // 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 WebPDemuxState WebPDemuxState; +// typedef enum WebPFormatFeature WebPFormatFeature; +typedef struct WebPDemuxer WebPDemuxer; +typedef struct WebPIterator WebPIterator; +typedef struct WebPChunkIterator WebPChunkIterator; +typedef struct WebPAnimInfo WebPAnimInfo; +typedef struct WebPAnimDecoderOptions WebPAnimDecoderOptions; + +//------------------------------------------------------------------------------ + +// Returns the version number of the demux library, packed in hexadecimal using +// 8bits for each of major/minor/revision. E.g: v2.5.7 is 0x020507. +WEBP_EXTERN(int) WebPGetDemuxVersion(void); + +//------------------------------------------------------------------------------ +// Life of a Demux object + +typedef enum WebPDemuxState { + WEBP_DEMUX_PARSE_ERROR = -1, // An error occurred while parsing. + WEBP_DEMUX_PARSING_HEADER = 0, // Not enough data to parse full header. + WEBP_DEMUX_PARSED_HEADER = 1, // Header parsing complete, + // data may be available. + WEBP_DEMUX_DONE = 2 // Entire file has been parsed. +} WebPDemuxState; + +// Internal, version-checked, entry point +WEBP_EXTERN(WebPDemuxer*) WebPDemuxInternal( + const WebPData*, int, WebPDemuxState*, int); + +// Parses the full WebP file given by 'data'. For single images the WebP file +// header alone or the file header and the chunk header may be absent. +// 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 possibly incomplete WebP file given by 'data'. +// If 'state' is non-NULL it will be set to indicate the status of the demuxer. +// Returns NULL in case of error or if there isn't enough data to start parsing; +// and a WebPDemuxer object on successful parse. +// Note that WebPDemuxer keeps internal pointers to 'data' memory segment. +// If this data is volatile, the demuxer object should be deleted (by calling +// WebPDemuxDelete()) and WebPDemuxPartial() called again on the new data. +// This is usually an inexpensive operation. +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 WebPFormatFeature { + WEBP_FF_FORMAT_FLAGS, // Extended format flags present in the 'VP8X' chunk. + WEBP_FF_CANVAS_WIDTH, + WEBP_FF_CANVAS_HEIGHT, + WEBP_FF_LOOP_COUNT, + WEBP_FF_BACKGROUND_COLOR, + WEBP_FF_FRAME_COUNT // Number of frames present in the demux object. + // In case of a partial demux, this is the number of + // frames seen so far, with the last frame possibly + // being partial. +} 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. + +struct WebPIterator { + int frame_num; + int num_frames; // equivalent to WEBP_FF_FRAME_COUNT. + int x_offset, y_offset; // offset relative to the canvas. + int width, height; // dimensions of this frame. + int duration; // display duration in milliseconds. + WebPMuxAnimDispose dispose_method; // dispose method for the frame. + int complete; // true if 'fragment' contains a full frame. partial images + // may still be decoded with the WebP incremental decoder. + WebPData fragment; // The frame given by 'frame_num'. Note for historical + // reasons this is called a fragment. + int has_alpha; // True if the frame contains transparency. + WebPMuxAnimBlend blend_method; // Blend operation for the frame. + + uint32_t pad[2]; // padding for later use. + void* private_; // for internal use only. +}; + +// Retrieves frame 'frame_number' from 'dmux'. +// 'iter->fragment' points to the frame on return from this function. +// 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->fragment' 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); + +// Releases any memory associated with 'iter'. +// Must be called before any subsequent calls to WebPDemuxGetChunk() on the same +// iter. Also, must be called before destroying the associated WebPDemuxer with +// WebPDemuxDelete(). +WEBP_EXTERN(void) WebPDemuxReleaseIterator(WebPIterator* iter); + +//------------------------------------------------------------------------------ +// Chunk iteration. + +struct WebPChunkIterator { + // 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_; +}; + +// 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", "XMP ", "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); + +//------------------------------------------------------------------------------ +// WebPAnimDecoder API +// +// This API allows decoding (possibly) animated WebP images. +// +// Code Example: +/* + WebPAnimDecoderOptions dec_options; + WebPAnimDecoderOptionsInit(&dec_options); + // Tune 'dec_options' as needed. + WebPAnimDecoder* dec = WebPAnimDecoderNew(webp_data, &dec_options); + WebPAnimInfo anim_info; + WebPAnimDecoderGetInfo(dec, &anim_info); + for (uint32_t i = 0; i < anim_info.loop_count; ++i) { + while (WebPAnimDecoderHasMoreFrames(dec)) { + uint8_t* buf; + int timestamp; + WebPAnimDecoderGetNext(dec, &buf, ×tamp); + // ... (Render 'buf' based on 'timestamp'). + // ... (Do NOT free 'buf', as it is owned by 'dec'). + } + WebPAnimDecoderReset(dec); + } + const WebPDemuxer* demuxer = WebPAnimDecoderGetDemuxer(dec); + // ... (Do something using 'demuxer'; e.g. get EXIF/XMP/ICC data). + WebPAnimDecoderDelete(dec); +*/ + +typedef struct WebPAnimDecoder WebPAnimDecoder; // Main opaque object. + +// Global options. +struct WebPAnimDecoderOptions { + // Output colorspace. Only the following modes are supported: + // MODE_RGBA, MODE_BGRA, MODE_rgbA and MODE_bgrA. + WEBP_CSP_MODE color_mode; + int use_threads; // If true, use multi-threaded decoding. + uint32_t padding[7]; // Padding for later use. +}; + +// Internal, version-checked, entry point. +WEBP_EXTERN(int) WebPAnimDecoderOptionsInitInternal( + WebPAnimDecoderOptions*, int); + +// Should always be called, to initialize a fresh WebPAnimDecoderOptions +// structure before modification. Returns false in case of version mismatch. +// WebPAnimDecoderOptionsInit() must have succeeded before using the +// 'dec_options' object. +static WEBP_INLINE int WebPAnimDecoderOptionsInit( + WebPAnimDecoderOptions* dec_options) { + return WebPAnimDecoderOptionsInitInternal(dec_options, + WEBP_DEMUX_ABI_VERSION); +} + +// Internal, version-checked, entry point. +WEBP_EXTERN(WebPAnimDecoder*) WebPAnimDecoderNewInternal( + const WebPData*, const WebPAnimDecoderOptions*, int); + +// Creates and initializes a WebPAnimDecoder object. +// Parameters: +// webp_data - (in) WebP bitstream. This should remain unchanged during the +// lifetime of the output WebPAnimDecoder object. +// dec_options - (in) decoding options. Can be passed NULL to choose +// reasonable defaults (in particular, color mode MODE_RGBA +// will be picked). +// Returns: +// A pointer to the newly created WebPAnimDecoder object, or NULL in case of +// parsing error, invalid option or memory error. +static WEBP_INLINE WebPAnimDecoder* WebPAnimDecoderNew( + const WebPData* webp_data, const WebPAnimDecoderOptions* dec_options) { + return WebPAnimDecoderNewInternal(webp_data, dec_options, + WEBP_DEMUX_ABI_VERSION); +} + +// Global information about the animation.. +struct WebPAnimInfo { + uint32_t canvas_width; + uint32_t canvas_height; + uint32_t loop_count; + uint32_t bgcolor; + uint32_t frame_count; + uint32_t pad[4]; // padding for later use +}; + +// Get global information about the animation. +// Parameters: +// dec - (in) decoder instance to get information from. +// info - (out) global information fetched from the animation. +// Returns: +// True on success. +WEBP_EXTERN(int) WebPAnimDecoderGetInfo(const WebPAnimDecoder* dec, + WebPAnimInfo* info); + +// Fetch the next frame from 'dec' based on options supplied to +// WebPAnimDecoderNew(). This will be a fully reconstructed canvas of size +// 'canvas_width * 4 * canvas_height', and not just the frame sub-rectangle. The +// returned buffer 'buf' is valid only until the next call to +// WebPAnimDecoderGetNext(), WebPAnimDecoderReset() or WebPAnimDecoderDelete(). +// Parameters: +// dec - (in/out) decoder instance from which the next frame is to be fetched. +// buf - (out) decoded frame. +// timestamp - (out) timestamp of the frame in milliseconds. +// Returns: +// False if any of the arguments are NULL, or if there is a parsing or +// decoding error, or if there are no more frames. Otherwise, returns true. +WEBP_EXTERN(int) WebPAnimDecoderGetNext(WebPAnimDecoder* dec, + uint8_t** buf, int* timestamp); + +// Check if there are more frames left to decode. +// Parameters: +// dec - (in) decoder instance to be checked. +// Returns: +// True if 'dec' is not NULL and some frames are yet to be decoded. +// Otherwise, returns false. +WEBP_EXTERN(int) WebPAnimDecoderHasMoreFrames(const WebPAnimDecoder* dec); + +// Resets the WebPAnimDecoder object, so that next call to +// WebPAnimDecoderGetNext() will restart decoding from 1st frame. This would be +// helpful when all frames need to be decoded multiple times (e.g. +// info.loop_count times) without destroying and recreating the 'dec' object. +// Parameters: +// dec - (in/out) decoder instance to be reset +WEBP_EXTERN(void) WebPAnimDecoderReset(WebPAnimDecoder* dec); + +// Grab the internal demuxer object. +// Getting the demuxer object can be useful if one wants to use operations only +// available through demuxer; e.g. to get XMP/EXIF/ICC metadata. The returned +// demuxer object is owned by 'dec' and is valid only until the next call to +// WebPAnimDecoderDelete(). +// +// Parameters: +// dec - (in) decoder instance from which the demuxer object is to be fetched. +WEBP_EXTERN(const WebPDemuxer*) WebPAnimDecoderGetDemuxer( + const WebPAnimDecoder* dec); + +// Deletes the WebPAnimDecoder object. +// Parameters: +// dec - (in/out) decoder instance to be deleted +WEBP_EXTERN(void) WebPAnimDecoderDelete(WebPAnimDecoder* dec); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_WEBP_DEMUX_H_ */ diff --git a/thirdparty/libwebp/webp/encode.h b/thirdparty/libwebp/webp/encode.h new file mode 100644 index 0000000000..9291b7195c --- /dev/null +++ b/thirdparty/libwebp/webp/encode.h @@ -0,0 +1,527 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_WEBP_ENCODE_H_ +#define WEBP_WEBP_ENCODE_H_ + +#include "./types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#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. +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 '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). +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); + +// 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 WebPImageHint { + 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; + +// 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) + + 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, 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). + 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 = max loss .. 100 = off + // (default)]. + 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 WebPPreset { + 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); +} + +// 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 +// Structure for storing auxiliary statistics (mostly for lossy encoding). + +struct WebPAuxStats { + 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 + int lossless_hdr_size; // lossless header (transform, huffman etc) size + int lossless_data_size; // lossless image data size + + 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 +// 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). +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 +}; + +// 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); + +// 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); + +// Color spaces. +typedef enum WebPEncCSP { + // chroma sampling + 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 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 + 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 + 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* pad7[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). 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, 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* 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. +// 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). 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, + 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. +// 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); + +// 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 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 = 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. +// 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 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. +// 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); + +// 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 + +// 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); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_WEBP_ENCODE_H_ */ diff --git a/thirdparty/libwebp/webp/format_constants.h b/thirdparty/libwebp/webp/format_constants.h new file mode 100644 index 0000000000..b6e78a643e --- /dev/null +++ b/thirdparty/libwebp/webp/format_constants.h @@ -0,0 +1,88 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// +// Author: Urvang (urvang@google.com) + +#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 +#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 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 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. +#define MAX_CHUNK_PAYLOAD (~0U - CHUNK_HEADER_SIZE - 1) + +#endif /* WEBP_WEBP_FORMAT_CONSTANTS_H_ */ diff --git a/thirdparty/libwebp/webp/mux.h b/thirdparty/libwebp/webp/mux.h new file mode 100644 index 0000000000..b72658c741 --- /dev/null +++ b/thirdparty/libwebp/webp/mux.h @@ -0,0 +1,530 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 and encoding for WebP images. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +#ifndef WEBP_WEBP_MUX_H_ +#define WEBP_WEBP_MUX_H_ + +#include "./mux_types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#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 WebPMuxError { + 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; + +// IDs for different types of chunks. +typedef enum WebPChunkId { + WEBP_CHUNK_VP8X, // VP8X + WEBP_CHUNK_ICCP, // ICCP + WEBP_CHUNK_ANIM, // ANIM + WEBP_CHUNK_ANMF, // ANMF + WEBP_CHUNK_FRGM, // FRGM + WEBP_CHUNK_ALPHA, // ALPH + WEBP_CHUNK_IMAGE, // VP8/VP8L + WEBP_CHUNK_EXIF, // EXIF + WEBP_CHUNK_XMP, // XMP + WEBP_CHUNK_UNKNOWN, // Other chunks. + WEBP_CHUNK_NIL +} WebPChunkId; + +//------------------------------------------------------------------------------ + +// 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 + +// 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. +// Or NULL in case of memory error. +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 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. +static WEBP_INLINE WebPMux* WebPMuxCreate(const WebPData* bitstream, + int copy_data) { + return WebPMuxCreateInternal(bitstream, copy_data, WEBP_MUX_ABI_VERSION); +} + +//------------------------------------------------------------------------------ +// Non-image chunks. + +// 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(). + +// 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 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, 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) WebPMuxSetChunk( + WebPMux* mux, const char fourcc[4], const WebPData* chunk_data, + int copy_data); + +// 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 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 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) WebPMuxGetChunk( + const WebPMux* mux, const char fourcc[4], WebPData* chunk_data); + +// Deletes the chunk with the given 'fourcc' from the mux object. +// Parameters: +// 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 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) WebPMuxDeleteChunk( + WebPMux* mux, const char fourcc[4]); + +//------------------------------------------------------------------------------ +// 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 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 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); + +// 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 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 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 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 +// frame - (out) data of the returned frame +// Returns: +// 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, WebPMuxFrameInfo* frame); + +// 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_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); + +//------------------------------------------------------------------------------ +// 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 ANIM chunk is to be set/added +// params - (in) animation parameters. +// Returns: +// 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) WebPMuxSetAnimationParams( + WebPMux* mux, const WebPMuxAnimParams* params); + +// Gets the animation parameters from the mux object. +// Parameters: +// 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 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) WebPMuxGetAnimationParams( + const WebPMux* mux, WebPMuxAnimParams* params); + +//------------------------------------------------------------------------------ +// Misc Utilities. + +// 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 to which the canvas size is to be set +// width - (in) canvas width +// height - (in) canvas height +// Returns: +// 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) WebPMuxSetCanvasSize(WebPMux* mux, + int width, int height); + +// 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) 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, 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) 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_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 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 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(). 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 mux or assembled_data is NULL. +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxAssemble(WebPMux* mux, + WebPData* assembled_data); + +//------------------------------------------------------------------------------ +// 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); +} + +// Internal, version-checked, entry point. +WEBP_EXTERN(WebPAnimEncoder*) WebPAnimEncoderNewInternal( + int, int, const WebPAnimEncoderOptions*, int); + +// 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); +} + +// 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); + +// 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); + +// Deletes the WebPAnimEncoder object. +// Parameters: +// enc - (in/out) object to be deleted +WEBP_EXTERN(void) WebPAnimEncoderDelete(WebPAnimEncoder* enc); + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_WEBP_MUX_H_ */ diff --git a/thirdparty/libwebp/webp/mux_types.h b/thirdparty/libwebp/webp/mux_types.h new file mode 100644 index 0000000000..c94043a3c0 --- /dev/null +++ b/thirdparty/libwebp/webp/mux_types.h @@ -0,0 +1,97 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// 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. +// ----------------------------------------------------------------------------- +// +// Data-types common to the mux and demux libraries. +// +// Author: Urvang (urvang@google.com) + +#ifndef WEBP_WEBP_MUX_TYPES_H_ +#define WEBP_WEBP_MUX_TYPES_H_ + +#include <stdlib.h> // free() +#include <string.h> // memset() +#include "./types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// Note: forward declaring enumerations is not allowed in (strict) C and C++, +// the types are left here for reference. +// typedef enum WebPFeatureFlags WebPFeatureFlags; +// typedef enum WebPMuxAnimDispose WebPMuxAnimDispose; +// typedef enum WebPMuxAnimBlend WebPMuxAnimBlend; +typedef struct WebPData WebPData; + +// VP8X Feature Flags. +typedef enum WebPFeatureFlags { + FRAGMENTS_FLAG = 0x00000001, + ANIMATION_FLAG = 0x00000002, + XMP_FLAG = 0x00000004, + EXIF_FLAG = 0x00000008, + ALPHA_FLAG = 0x00000010, + ICCP_FLAG = 0x00000020 +} WebPFeatureFlags; + +// Dispose method (animation only). Indicates how the area used by the current +// frame is to be treated before rendering the next frame on the canvas. +typedef enum WebPMuxAnimDispose { + WEBP_MUX_DISPOSE_NONE, // Do not dispose. + WEBP_MUX_DISPOSE_BACKGROUND // Dispose to background color. +} WebPMuxAnimDispose; + +// Blend operation (animation only). Indicates how transparent pixels of the +// current frame are blended with those of the previous canvas. +typedef enum WebPMuxAnimBlend { + WEBP_MUX_BLEND, // Blend. + WEBP_MUX_NO_BLEND // Do not blend. +} WebPMuxAnimBlend; + +// Data type used to describe 'raw' data, e.g., chunk data +// (ICC profile, metadata) and WebP compressed image data. +struct WebPData { + const uint8_t* bytes; + size_t size; +}; + +// Initializes the contents of the 'webp_data' object with default values. +static WEBP_INLINE void WebPDataInit(WebPData* webp_data) { + if (webp_data != NULL) { + memset(webp_data, 0, sizeof(*webp_data)); + } +} + +// Clears the contents of the 'webp_data' object by calling free(). Does not +// deallocate the object itself. +static WEBP_INLINE void WebPDataClear(WebPData* webp_data) { + if (webp_data != NULL) { + free((void*)webp_data->bytes); + WebPDataInit(webp_data); + } +} + +// Allocates necessary storage for 'dst' and copies the contents of 'src'. +// Returns true on success. +static WEBP_INLINE 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; +} + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_WEBP_MUX_TYPES_H_ */ diff --git a/thirdparty/libwebp/webp/types.h b/thirdparty/libwebp/webp/types.h new file mode 100644 index 0000000000..98fff35a11 --- /dev/null +++ b/thirdparty/libwebp/webp/types.h @@ -0,0 +1,52 @@ +// Copyright 2010 Google Inc. All Rights Reserved. +// +// 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 +// +// 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> +#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; +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. +# 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) +#define WEBP_ABI_IS_INCOMPATIBLE(a, b) (((a) >> 8) != ((b) >> 8)) + +#endif /* WEBP_WEBP_TYPES_H_ */ |