diff options
Diffstat (limited to 'drivers/webpold/enc/webpenc.c')
| -rw-r--r-- | drivers/webpold/enc/webpenc.c | 389 |
1 files changed, 389 insertions, 0 deletions
diff --git a/drivers/webpold/enc/webpenc.c b/drivers/webpold/enc/webpenc.c new file mode 100644 index 0000000000..3c275589fc --- /dev/null +++ b/drivers/webpold/enc/webpenc.c @@ -0,0 +1,389 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// WebP encoder: main entry point +// +// Author: Skal (pascal.massimino@gmail.com) + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include <math.h> + +#include "./vp8enci.h" +#include "./vp8li.h" +#include "../utils/utils.h" + +// #define PRINT_MEMORY_INFO + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#ifdef PRINT_MEMORY_INFO +#include <stdio.h> +#endif + +//------------------------------------------------------------------------------ + +int WebPGetEncoderVersion(void) { + return (ENC_MAJ_VERSION << 16) | (ENC_MIN_VERSION << 8) | ENC_REV_VERSION; +} + +//------------------------------------------------------------------------------ +// WebPPicture +//------------------------------------------------------------------------------ + +static int DummyWriter(const uint8_t* data, size_t data_size, + const WebPPicture* const picture) { + // The following are to prevent 'unused variable' error message. + (void)data; + (void)data_size; + (void)picture; + return 1; +} + +int WebPPictureInitInternal(WebPPicture* picture, int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) { + return 0; // caller/system version mismatch! + } + if (picture != NULL) { + memset(picture, 0, sizeof(*picture)); + picture->writer = DummyWriter; + WebPEncodingSetError(picture, VP8_ENC_OK); + } + return 1; +} + +//------------------------------------------------------------------------------ +// VP8Encoder +//------------------------------------------------------------------------------ + +static void ResetSegmentHeader(VP8Encoder* const enc) { + VP8SegmentHeader* const hdr = &enc->segment_hdr_; + hdr->num_segments_ = enc->config_->segments; + hdr->update_map_ = (hdr->num_segments_ > 1); + hdr->size_ = 0; +} + +static void ResetFilterHeader(VP8Encoder* const enc) { + VP8FilterHeader* const hdr = &enc->filter_hdr_; + hdr->simple_ = 1; + hdr->level_ = 0; + hdr->sharpness_ = 0; + hdr->i4x4_lf_delta_ = 0; +} + +static void ResetBoundaryPredictions(VP8Encoder* const enc) { + // init boundary values once for all + // Note: actually, initializing the preds_[] is only needed for intra4. + int i; + uint8_t* const top = enc->preds_ - enc->preds_w_; + uint8_t* const left = enc->preds_ - 1; + for (i = -1; i < 4 * enc->mb_w_; ++i) { + top[i] = B_DC_PRED; + } + for (i = 0; i < 4 * enc->mb_h_; ++i) { + left[i * enc->preds_w_] = B_DC_PRED; + } + enc->nz_[-1] = 0; // constant +} + +// Map configured quality level to coding tools used. +//-------------+---+---+---+---+---+---+ +// Quality | 0 | 1 | 2 | 3 | 4 | 5 + +//-------------+---+---+---+---+---+---+ +// dynamic prob| ~ | x | x | x | x | x | +//-------------+---+---+---+---+---+---+ +// rd-opt modes| | | x | x | x | x | +//-------------+---+---+---+---+---+---+ +// fast i4/i16 | x | x | | | | | +//-------------+---+---+---+---+---+---+ +// rd-opt i4/16| | | x | x | x | x | +//-------------+---+---+---+---+---+---+ +// Trellis | | x | | | x | x | +//-------------+---+---+---+---+---+---+ +// full-SNS | | | | | | x | +//-------------+---+---+---+---+---+---+ + +static void MapConfigToTools(VP8Encoder* const enc) { + const int method = enc->config_->method; + const int limit = 100 - enc->config_->partition_limit; + enc->method_ = method; + enc->rd_opt_level_ = (method >= 6) ? 3 + : (method >= 5) ? 2 + : (method >= 3) ? 1 + : 0; + enc->max_i4_header_bits_ = + 256 * 16 * 16 * // upper bound: up to 16bit per 4x4 block + (limit * limit) / (100 * 100); // ... modulated with a quadratic curve. +} + +// Memory scaling with dimensions: +// memory (bytes) ~= 2.25 * w + 0.0625 * w * h +// +// Typical memory footprint (768x510 picture) +// Memory used: +// encoder: 33919 +// block cache: 2880 +// info: 3072 +// preds: 24897 +// top samples: 1623 +// non-zero: 196 +// lf-stats: 2048 +// total: 68635 +// Transcient object sizes: +// VP8EncIterator: 352 +// VP8ModeScore: 912 +// VP8SegmentInfo: 532 +// VP8Proba: 31032 +// LFStats: 2048 +// Picture size (yuv): 589824 + +static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, + WebPPicture* const picture) { + const int use_filter = + (config->filter_strength > 0) || (config->autofilter > 0); + const int mb_w = (picture->width + 15) >> 4; + const int mb_h = (picture->height + 15) >> 4; + const int preds_w = 4 * mb_w + 1; + const int preds_h = 4 * mb_h + 1; + const size_t preds_size = preds_w * preds_h * sizeof(uint8_t); + const int top_stride = mb_w * 16; + const size_t nz_size = (mb_w + 1) * sizeof(uint32_t); + const size_t cache_size = (3 * YUV_SIZE + PRED_SIZE) * sizeof(uint8_t); + const size_t info_size = mb_w * mb_h * sizeof(VP8MBInfo); + const size_t samples_size = (2 * top_stride + // top-luma/u/v + 16 + 16 + 16 + 8 + 1 + // left y/u/v + 2 * ALIGN_CST) // align all + * sizeof(uint8_t); + const size_t lf_stats_size = + config->autofilter ? sizeof(LFStats) + ALIGN_CST : 0; + VP8Encoder* enc; + uint8_t* mem; + const uint64_t size = (uint64_t)sizeof(VP8Encoder) // main struct + + ALIGN_CST // cache alignment + + cache_size // working caches + + info_size // modes info + + preds_size // prediction modes + + samples_size // top/left samples + + nz_size // coeff context bits + + lf_stats_size; // autofilter stats + +#ifdef PRINT_MEMORY_INFO + printf("===================================\n"); + printf("Memory used:\n" + " encoder: %ld\n" + " block cache: %ld\n" + " info: %ld\n" + " preds: %ld\n" + " top samples: %ld\n" + " non-zero: %ld\n" + " lf-stats: %ld\n" + " total: %ld\n", + sizeof(VP8Encoder) + ALIGN_CST, cache_size, info_size, + preds_size, samples_size, nz_size, lf_stats_size, size); + printf("Transcient object sizes:\n" + " VP8EncIterator: %ld\n" + " VP8ModeScore: %ld\n" + " VP8SegmentInfo: %ld\n" + " VP8Proba: %ld\n" + " LFStats: %ld\n", + sizeof(VP8EncIterator), sizeof(VP8ModeScore), + sizeof(VP8SegmentInfo), sizeof(VP8Proba), + sizeof(LFStats)); + printf("Picture size (yuv): %ld\n", + mb_w * mb_h * 384 * sizeof(uint8_t)); + printf("===================================\n"); +#endif + mem = (uint8_t*)WebPSafeMalloc(size, sizeof(*mem)); + if (mem == NULL) { + WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); + return NULL; + } + enc = (VP8Encoder*)mem; + mem = (uint8_t*)DO_ALIGN(mem + sizeof(*enc)); + memset(enc, 0, sizeof(*enc)); + enc->num_parts_ = 1 << config->partitions; + enc->mb_w_ = mb_w; + enc->mb_h_ = mb_h; + enc->preds_w_ = preds_w; + enc->yuv_in_ = (uint8_t*)mem; + mem += YUV_SIZE; + enc->yuv_out_ = (uint8_t*)mem; + mem += YUV_SIZE; + enc->yuv_out2_ = (uint8_t*)mem; + mem += YUV_SIZE; + enc->yuv_p_ = (uint8_t*)mem; + mem += PRED_SIZE; + enc->mb_info_ = (VP8MBInfo*)mem; + mem += info_size; + enc->preds_ = ((uint8_t*)mem) + 1 + enc->preds_w_; + mem += preds_w * preds_h * sizeof(uint8_t); + enc->nz_ = 1 + (uint32_t*)mem; + mem += nz_size; + enc->lf_stats_ = lf_stats_size ? (LFStats*)DO_ALIGN(mem) : NULL; + mem += lf_stats_size; + + // top samples (all 16-aligned) + mem = (uint8_t*)DO_ALIGN(mem); + enc->y_top_ = (uint8_t*)mem; + enc->uv_top_ = enc->y_top_ + top_stride; + mem += 2 * top_stride; + mem = (uint8_t*)DO_ALIGN(mem + 1); + enc->y_left_ = (uint8_t*)mem; + mem += 16 + 16; + enc->u_left_ = (uint8_t*)mem; + mem += 16; + enc->v_left_ = (uint8_t*)mem; + mem += 8; + + enc->config_ = config; + enc->profile_ = use_filter ? ((config->filter_type == 1) ? 0 : 1) : 2; + enc->pic_ = picture; + enc->percent_ = 0; + + MapConfigToTools(enc); + VP8EncDspInit(); + VP8DefaultProbas(enc); + ResetSegmentHeader(enc); + ResetFilterHeader(enc); + ResetBoundaryPredictions(enc); + + VP8EncInitAlpha(enc); +#ifdef WEBP_EXPERIMENTAL_FEATURES + VP8EncInitLayer(enc); +#endif + + return enc; +} + +static void DeleteVP8Encoder(VP8Encoder* enc) { + if (enc != NULL) { + VP8EncDeleteAlpha(enc); +#ifdef WEBP_EXPERIMENTAL_FEATURES + VP8EncDeleteLayer(enc); +#endif + free(enc); + } +} + +//------------------------------------------------------------------------------ + +static double GetPSNR(uint64_t err, uint64_t size) { + return err ? 10. * log10(255. * 255. * size / err) : 99.; +} + +static void FinalizePSNR(const VP8Encoder* const enc) { + WebPAuxStats* stats = enc->pic_->stats; + const uint64_t size = enc->sse_count_; + const uint64_t* const sse = enc->sse_; + stats->PSNR[0] = (float)GetPSNR(sse[0], size); + stats->PSNR[1] = (float)GetPSNR(sse[1], size / 4); + stats->PSNR[2] = (float)GetPSNR(sse[2], size / 4); + stats->PSNR[3] = (float)GetPSNR(sse[0] + sse[1] + sse[2], size * 3 / 2); + stats->PSNR[4] = (float)GetPSNR(sse[3], size); +} + +static void StoreStats(VP8Encoder* const enc) { + WebPAuxStats* const stats = enc->pic_->stats; + if (stats != NULL) { + int i, s; + for (i = 0; i < NUM_MB_SEGMENTS; ++i) { + stats->segment_level[i] = enc->dqm_[i].fstrength_; + stats->segment_quant[i] = enc->dqm_[i].quant_; + for (s = 0; s <= 2; ++s) { + stats->residual_bytes[s][i] = enc->residual_bytes_[s][i]; + } + } + FinalizePSNR(enc); + stats->coded_size = enc->coded_size_; + for (i = 0; i < 3; ++i) { + stats->block_count[i] = enc->block_count_[i]; + } + } + WebPReportProgress(enc->pic_, 100, &enc->percent_); // done! +} + +int WebPEncodingSetError(const WebPPicture* const pic, + WebPEncodingError error) { + assert((int)error < VP8_ENC_ERROR_LAST); + assert((int)error >= VP8_ENC_OK); + ((WebPPicture*)pic)->error_code = error; + return 0; +} + +int WebPReportProgress(const WebPPicture* const pic, + int percent, int* const percent_store) { + if (percent_store != NULL && percent != *percent_store) { + *percent_store = percent; + if (pic->progress_hook && !pic->progress_hook(percent, pic)) { + // user abort requested + WebPEncodingSetError(pic, VP8_ENC_ERROR_USER_ABORT); + return 0; + } + } + return 1; // ok +} +//------------------------------------------------------------------------------ + +int WebPEncode(const WebPConfig* config, WebPPicture* pic) { + int ok; + + if (pic == NULL) + return 0; + WebPEncodingSetError(pic, VP8_ENC_OK); // all ok so far + if (config == NULL) // bad params + return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); + if (!WebPValidateConfig(config)) + return WebPEncodingSetError(pic, VP8_ENC_ERROR_INVALID_CONFIGURATION); + if (pic->width <= 0 || pic->height <= 0) + return WebPEncodingSetError(pic, VP8_ENC_ERROR_BAD_DIMENSION); + if (pic->width > WEBP_MAX_DIMENSION || pic->height > WEBP_MAX_DIMENSION) + return WebPEncodingSetError(pic, VP8_ENC_ERROR_BAD_DIMENSION); + + if (pic->stats != NULL) memset(pic->stats, 0, sizeof(*pic->stats)); + + if (!config->lossless) { + VP8Encoder* enc = NULL; + if (pic->y == NULL || pic->u == NULL || pic->v == NULL) { + if (pic->argb != NULL) { + if (!WebPPictureARGBToYUVA(pic, WEBP_YUV420)) return 0; + } else { + return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); + } + } + + enc = InitVP8Encoder(config, pic); + if (enc == NULL) return 0; // pic->error is already set. + // Note: each of the tasks below account for 20% in the progress report. + ok = VP8EncAnalyze(enc) + && VP8StatLoop(enc) + && VP8EncLoop(enc) + && VP8EncFinishAlpha(enc) +#ifdef WEBP_EXPERIMENTAL_FEATURES + && VP8EncFinishLayer(enc) +#endif + && VP8EncWrite(enc); + StoreStats(enc); + if (!ok) { + VP8EncFreeBitWriters(enc); + } + DeleteVP8Encoder(enc); + } else { + if (pic->argb == NULL) + return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); + + ok = VP8LEncodeImage(config, pic); // Sets pic->error in case of problem. + } + + return ok; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif |