diff options
63 files changed, 5921 insertions, 1732 deletions
diff --git a/third_party/libwebp/README.chromium b/third_party/libwebp/README.chromium index dd1e646..83a6a17 100644 --- a/third_party/libwebp/README.chromium +++ b/third_party/libwebp/README.chromium @@ -1,14 +1,14 @@ Name: WebP image encoder/decoder Short Name: libwebp URL: http://developers.google.com/speed/webp -Version: v0.2.0-rc1 +Version: v0.3.0-rc6 License: BSD License File: LICENSE Security Critical: Yes Description: Source archive: - http://code.google.com/p/webp/downloads/detail?name=libwebp-0.2.0-rc1.tar.gz + http://code.google.com/p/webp/downloads/detail?name=libwebp-0.3.0-rc6.tar.gz WebP is an image format that does both lossy and lossless compression of digital photographic images. WebP consists of a codec based on VP8, that Google @@ -20,12 +20,3 @@ Local changes: * Removed examples/, documentation and build related files, keeping only the contents of src/ less mux/ which is unused. * Merged COPYING/PATENTS to LICENSE - * Revert VP8 encoder changes to avoid WebKit layout test conflicts - (fast/canvas/canvas-toDataURL) - WebKit bug tracking test update: - https://bugs.webkit.org/show_bug.cgi?id=93310 - Changes reverted: - 0de3096 use 16bit counters for recording proba counts - 7f23678 fix for LevelCost + little speed-up - 7107d54 further speed-up/cleanup of RecordCoeffs() and GetResidualCost() - * (Security) fix overflow in ParseOptionalChunks; to be upstreamed. diff --git a/third_party/libwebp/dec/alpha.c b/third_party/libwebp/dec/alpha.c index 6e65de9..5c9cdd6 100644 --- a/third_party/libwebp/dec/alpha.c +++ b/third_party/libwebp/dec/alpha.c @@ -13,7 +13,7 @@ #include "./vp8i.h" #include "./vp8li.h" #include "../utils/filters.h" -#include "../utils/quant_levels.h" +#include "../utils/quant_levels_dec.h" #include "../webp/format_constants.h" #if defined(__cplusplus) || defined(c_plusplus) @@ -44,7 +44,6 @@ static int DecodeAlpha(const uint8_t* data, size_t data_size, int width, int height, int stride, uint8_t* output) { uint8_t* decoded_data = NULL; const size_t decoded_size = height * width; - uint8_t* unfiltered_data = NULL; WEBP_FILTER_TYPE filter; int pre_processing; int rsrv; @@ -83,29 +82,19 @@ static int DecodeAlpha(const uint8_t* data, size_t data_size, } if (ok) { - WebPFilterFunc unfilter_func = WebPUnfilters[filter]; + WebPUnfilterFunc unfilter_func = WebPUnfilters[filter]; if (unfilter_func != NULL) { - unfiltered_data = (uint8_t*)malloc(decoded_size); - if (unfiltered_data == NULL) { - ok = 0; - goto Error; - } // TODO(vikas): Implement on-the-fly decoding & filter mechanism to decode // and apply filter per image-row. - unfilter_func(decoded_data, width, height, 1, width, unfiltered_data); - // Construct raw_data (height x stride) from alpha data (height x width). - CopyPlane(unfiltered_data, width, output, stride, width, height); - free(unfiltered_data); - } else { - // Construct raw_data (height x stride) from alpha data (height x width). - CopyPlane(decoded_data, width, output, stride, width, height); + unfilter_func(width, height, width, decoded_data); } + // Construct raw_data (height x stride) from alpha data (height x width). + CopyPlane(decoded_data, width, output, stride, width, height); if (pre_processing == ALPHA_PREPROCESSED_LEVELS) { ok = DequantizeLevels(decoded_data, width, height); } } - Error: if (method != ALPHA_NO_COMPRESSION) { free(decoded_data); } diff --git a/third_party/libwebp/dec/frame.c b/third_party/libwebp/dec/frame.c index 9c91a48..911c7ff 100644 --- a/third_party/libwebp/dec/frame.c +++ b/third_party/libwebp/dec/frame.c @@ -97,54 +97,51 @@ static void FilterRow(const VP8Decoder* const dec) { } //------------------------------------------------------------------------------ +// Precompute the filtering strength for each segment and each i4x4/i16x16 mode. -void VP8StoreBlock(VP8Decoder* const dec) { +static void PrecomputeFilterStrengths(VP8Decoder* const dec) { if (dec->filter_type_ > 0) { - VP8FInfo* const info = dec->f_info_ + dec->mb_x_; - const int skip = dec->mb_info_[dec->mb_x_].skip_; - int level = dec->filter_levels_[dec->segment_]; - if (dec->filter_hdr_.use_lf_delta_) { - // TODO(skal): only CURRENT is handled for now. - level += dec->filter_hdr_.ref_lf_delta_[0]; - if (dec->is_i4x4_) { - level += dec->filter_hdr_.mode_lf_delta_[0]; - } - } - level = (level < 0) ? 0 : (level > 63) ? 63 : level; - info->f_level_ = level; - - if (dec->filter_hdr_.sharpness_ > 0) { - if (dec->filter_hdr_.sharpness_ > 4) { - level >>= 2; + 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 { - level >>= 1; + base_level = hdr->level_; } - if (level > 9 - dec->filter_hdr_.sharpness_) { - level = 9 - dec->filter_hdr_.sharpness_; + for (i4x4 = 0; i4x4 <= 1; ++i4x4) { + VP8FInfo* const info = &dec->fstrengths_[s][i4x4]; + int level = base_level; + if (hdr->use_lf_delta_) { + // TODO(skal): only CURRENT is handled for now. + level += hdr->ref_lf_delta_[0]; + if (i4x4) { + level += hdr->mode_lf_delta_[0]; + } + } + level = (level < 0) ? 0 : (level > 63) ? 63 : level; + info->f_level_ = level; + + if (hdr->sharpness_ > 0) { + if (hdr->sharpness_ > 4) { + level >>= 2; + } else { + level >>= 1; + } + if (level > 9 - hdr->sharpness_) { + level = 9 - hdr->sharpness_; + } + } + info->f_ilevel_ = (level < 1) ? 1 : level; + info->f_inner_ = 0; } } - - info->f_ilevel_ = (level < 1) ? 1 : level; - info->f_inner_ = (!skip || dec->is_i4x4_); - } - { - // Transfer samples to row cache - int y; - const int y_offset = dec->cache_id_ * 16 * dec->cache_y_stride_; - const int uv_offset = dec->cache_id_ * 8 * dec->cache_uv_stride_; - uint8_t* const ydst = dec->cache_y_ + dec->mb_x_ * 16 + y_offset; - uint8_t* const udst = dec->cache_u_ + dec->mb_x_ * 8 + uv_offset; - uint8_t* const vdst = dec->cache_v_ + dec->mb_x_ * 8 + uv_offset; - for (y = 0; y < 16; ++y) { - memcpy(ydst + y * dec->cache_y_stride_, - dec->yuv_b_ + Y_OFF + y * BPS, 16); - } - for (y = 0; y < 8; ++y) { - memcpy(udst + y * dec->cache_uv_stride_, - dec->yuv_b_ + U_OFF + y * BPS, 8); - memcpy(vdst + y * dec->cache_uv_stride_, - dec->yuv_b_ + V_OFF + y * BPS, 8); - } } } @@ -339,6 +336,7 @@ VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io) { dec->br_mb_y_ = dec->mb_h_; } } + PrecomputeFilterStrengths(dec); return VP8_STATUS_OK; } @@ -496,6 +494,7 @@ static int AllocateMemory(VP8Decoder* const dec) { // alpha plane dec->alpha_plane_ = alpha_size ? (uint8_t*)mem : NULL; mem += alpha_size; + assert(mem <= (uint8_t*)dec->mem_ + dec->mem_size_); // note: left-info is initialized once for all. memset(dec->mb_info_ - 1, 0, mb_info_size); @@ -551,6 +550,7 @@ static WEBP_INLINE void Copy32b(uint8_t* dst, uint8_t* src) { } void VP8ReconstructBlock(VP8Decoder* const dec) { + int j; 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; @@ -558,7 +558,6 @@ void VP8ReconstructBlock(VP8Decoder* const dec) { // Rotate in the left samples from previously decoded block. We move four // pixels at a time for alignment reason, and because of in-loop filter. if (dec->mb_x_ > 0) { - int j; for (j = -1; j < 16; ++j) { Copy32b(&y_dst[j * BPS - 4], &y_dst[j * BPS + 12]); } @@ -567,7 +566,6 @@ void VP8ReconstructBlock(VP8Decoder* const dec) { Copy32b(&v_dst[j * BPS - 4], &v_dst[j * BPS + 4]); } } else { - int j; for (j = 0; j < 16; ++j) { y_dst[j * BPS - 1] = 129; } @@ -670,6 +668,21 @@ void VP8ReconstructBlock(VP8Decoder* const dec) { } } } + // Transfer reconstructed samples from yuv_b_ cache to final destination. + { + const int y_offset = dec->cache_id_ * 16 * dec->cache_y_stride_; + const int uv_offset = dec->cache_id_ * 8 * dec->cache_uv_stride_; + uint8_t* const y_out = dec->cache_y_ + dec->mb_x_ * 16 + y_offset; + uint8_t* const u_out = dec->cache_u_ + dec->mb_x_ * 8 + uv_offset; + uint8_t* const v_out = dec->cache_v_ + dec->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); + } + } } //------------------------------------------------------------------------------ diff --git a/third_party/libwebp/dec/idec.c b/third_party/libwebp/dec/idec.c index 7df790c..17810c8 100644 --- a/third_party/libwebp/dec/idec.c +++ b/third_party/libwebp/dec/idec.c @@ -425,9 +425,8 @@ static VP8StatusCode DecodeRemaining(WebPIDecoder* const idec) { } return VP8_STATUS_SUSPENDED; } + // Reconstruct and emit samples. VP8ReconstructBlock(dec); - // Store data and save block's filtering params - VP8StoreBlock(dec); // Release buffer only if there is only one partition if (dec->num_parts_ == 1) { @@ -596,12 +595,22 @@ void WebPIDelete(WebPIDecoder* idec) { WebPIDecoder* WebPINewRGB(WEBP_CSP_MODE mode, uint8_t* output_buffer, size_t output_buffer_size, int output_stride) { + const int is_external_memory = (output_buffer != NULL); WebPIDecoder* idec; + if (mode >= MODE_YUV) return NULL; + if (!is_external_memory) { // Overwrite parameters to sane values. + output_buffer_size = 0; + output_stride = 0; + } else { // A buffer was passed. Validate the other params. + if (output_stride == 0 || output_buffer_size == 0) { + return NULL; // invalid parameter. + } + } idec = WebPINewDecoder(NULL); if (idec == NULL) return NULL; idec->output_.colorspace = mode; - idec->output_.is_external_memory = 1; + idec->output_.is_external_memory = is_external_memory; idec->output_.u.RGBA.rgba = output_buffer; idec->output_.u.RGBA.stride = output_stride; idec->output_.u.RGBA.size = output_buffer_size; @@ -612,10 +621,30 @@ WebPIDecoder* WebPINewYUVA(uint8_t* luma, size_t luma_size, int luma_stride, uint8_t* u, size_t u_size, int u_stride, uint8_t* v, size_t v_size, int v_stride, uint8_t* a, size_t a_size, int a_stride) { - WebPIDecoder* const idec = WebPINewDecoder(NULL); + const int is_external_memory = (luma != NULL); + WebPIDecoder* idec; + WEBP_CSP_MODE colorspace; + + if (!is_external_memory) { // Overwrite parameters to sane values. + luma_size = u_size = v_size = a_size = 0; + luma_stride = u_stride = v_stride = a_stride = 0; + u = v = a = NULL; + colorspace = MODE_YUVA; + } else { // A luma buffer was passed. Validate the other parameters. + if (u == NULL || v == NULL) return NULL; + if (luma_size == 0 || u_size == 0 || v_size == 0) return NULL; + if (luma_stride == 0 || u_stride == 0 || v_stride == 0) return NULL; + if (a != NULL) { + if (a_size == 0 || a_stride == 0) return NULL; + } + colorspace = (a == NULL) ? MODE_YUV : MODE_YUVA; + } + + idec = WebPINewDecoder(NULL); if (idec == NULL) return NULL; - idec->output_.colorspace = (a == NULL) ? MODE_YUV : MODE_YUVA; - idec->output_.is_external_memory = 1; + + idec->output_.colorspace = colorspace; + idec->output_.is_external_memory = is_external_memory; idec->output_.u.YUVA.y = luma; idec->output_.u.YUVA.y_stride = luma_stride; idec->output_.u.YUVA.y_size = luma_size; diff --git a/third_party/libwebp/dec/io.c b/third_party/libwebp/dec/io.c index 2c75f78..594804c 100644 --- a/third_party/libwebp/dec/io.c +++ b/third_party/libwebp/dec/io.c @@ -111,7 +111,7 @@ static int EmitFancyRGB(const VP8Io* const io, WebPDecParams* const p) { const uint8_t* top_u = p->tmp_u; const uint8_t* top_v = p->tmp_v; int y = io->mb_y; - int y_end = io->mb_y + io->mb_h; + 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; @@ -150,7 +150,7 @@ static int EmitFancyRGB(const VP8Io* const io, WebPDecParams* const p) { // 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); + dst + buf->stride, NULL, mb_w); } } return num_lines_out; @@ -184,49 +184,60 @@ static int EmitAlphaYUV(const VP8Io* const io, WebPDecParams* const p) { return 0; } +static int GetAlphaSourceRow(const VP8Io* const io, + const uint8_t** alpha, int* const num_rows) { + int start_y = io->mb_y; + *num_rows = io->mb_h; + + // Compensate for the 1-line delay of the fancy upscaler. + // This is similar to EmitFancyRGB(). + if (io->fancy_upsampling) { + if (start_y == 0) { + // We don't process the last row yet. It'll be done during the next call. + --*num_rows; + } else { + --start_y; + // Fortunately, *alpha data is persistent, so we can go back + // one row and finish alpha blending, now that the fancy upscaler + // completed the YUV->RGB interpolation. + *alpha -= io->width; + } + if (io->crop_top + io->mb_y + io->mb_h == io->crop_bottom) { + // If it's the very last call, we process all the remaining rows! + *num_rows = io->crop_bottom - io->crop_top - start_y; + } + } + return start_y; +} + static int EmitAlphaRGB(const VP8Io* const io, WebPDecParams* const p) { const uint8_t* alpha = io->a; if (alpha != NULL) { const int mb_w = io->mb_w; - const int mb_h = io->mb_h; - int i, j; 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 start_y = io->mb_y; - int num_rows = mb_h; - - // We compensate for the 1-line delay of 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 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 + mb_h == io->crop_bottom) { - // If it's the very last call, we process all the remaing rows! - num_rows = io->crop_bottom - io->crop_top - start_y; + int num_rows; + const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows); + uint8_t* const base_rgba = buf->rgba + start_y * buf->stride; + uint8_t* dst = base_rgba + (alpha_first ? 0 : 3); + uint32_t alpha_mask = 0xff; + int i, j; + + for (j = 0; j < num_rows; ++j) { + for (i = 0; i < mb_w; ++i) { + const uint32_t alpha_value = alpha[i]; + dst[4 * i] = alpha_value; + alpha_mask &= alpha_value; } + alpha += io->width; + dst += buf->stride; } - { - uint8_t* const base_rgba = buf->rgba + start_y * buf->stride; - uint8_t* dst = base_rgba + (alpha_first ? 0 : 3); - for (j = 0; j < num_rows; ++j) { - for (i = 0; i < mb_w; ++i) dst[4 * i] = alpha[i]; - alpha += io->width; - dst += buf->stride; - } - if (WebPIsPremultipliedMode(colorspace)) { - WebPApplyAlphaMultiply(base_rgba, alpha_first, - mb_w, num_rows, buf->stride); - } + // alpha_mask is < 0xff if there's non-trivial alpha to premultiply with. + if (alpha_mask != 0xff && WebPIsPremultipliedMode(colorspace)) { + WebPApplyAlphaMultiply(base_rgba, alpha_first, + mb_w, num_rows, buf->stride); } } return 0; @@ -236,22 +247,27 @@ static int EmitAlphaRGBA4444(const VP8Io* const io, WebPDecParams* const p) { const uint8_t* alpha = io->a; if (alpha != NULL) { const int mb_w = io->mb_w; - const int mb_h = io->mb_h; - int i, j; + const WEBP_CSP_MODE colorspace = p->output->colorspace; const WebPRGBABuffer* const buf = &p->output->u.RGBA; - uint8_t* const base_rgba = buf->rgba + io->mb_y * buf->stride; + int num_rows; + const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows); + uint8_t* const base_rgba = buf->rgba + start_y * buf->stride; uint8_t* alpha_dst = base_rgba + 1; - for (j = 0; j < mb_h; ++j) { + 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_val = VP8Clip4Bits(alpha[i]); - alpha_dst[2 * i] = (alpha_dst[2 * i] & 0xf0) | alpha_val; + const uint32_t alpha_value = alpha[i] >> 4; + alpha_dst[2 * i] = (alpha_dst[2 * i] & 0xf0) | alpha_value; + alpha_mask &= alpha_value; } alpha += io->width; alpha_dst += buf->stride; } - if (p->output->colorspace == MODE_rgbA_4444) { - WebPApplyAlphaMultiply4444(base_rgba, mb_w, mb_h, buf->stride); + if (alpha_mask != 0x0f && WebPIsPremultipliedMode(colorspace)) { + WebPApplyAlphaMultiply4444(base_rgba, mb_w, num_rows, buf->stride); } } return 0; @@ -396,17 +412,22 @@ static int ExportAlpha(WebPDecParams* const p, int y_pos) { uint8_t* dst = base_rgba + (alpha_first ? 0 : 3); int num_lines_out = 0; const int is_premult_alpha = WebPIsPremultipliedMode(colorspace); + uint32_t alpha_mask = 0xff; const int width = p->scaler_a.dst_width; while (WebPRescalerHasPendingOutput(&p->scaler_a)) { int i; assert(p->last_y + y_pos + num_lines_out < p->output->height); WebPRescalerExportRow(&p->scaler_a); - for (i = 0; i < width; ++i) dst[4 * i] = p->scaler_a.dst[i]; + for (i = 0; i < width; ++i) { + const uint32_t alpha_value = p->scaler_a.dst[i]; + dst[4 * i] = alpha_value; + alpha_mask &= alpha_value; + } dst += buf->stride; ++num_lines_out; } - if (is_premult_alpha) { + if (is_premult_alpha && alpha_mask != 0xff) { WebPApplyAlphaMultiply(base_rgba, alpha_first, width, num_lines_out, buf->stride); } @@ -421,6 +442,7 @@ static int ExportAlphaRGBA4444(WebPDecParams* const p, int y_pos) { const WEBP_CSP_MODE colorspace = p->output->colorspace; const int width = p->scaler_a.dst_width; const int is_premult_alpha = WebPIsPremultipliedMode(colorspace); + uint32_t alpha_mask = 0x0f; while (WebPRescalerHasPendingOutput(&p->scaler_a)) { int i; @@ -428,13 +450,14 @@ static int ExportAlphaRGBA4444(WebPDecParams* const p, int y_pos) { WebPRescalerExportRow(&p->scaler_a); for (i = 0; i < width; ++i) { // Fill in the alpha value (converted to 4 bits). - const uint32_t alpha_val = VP8Clip4Bits(p->scaler_a.dst[i]); - alpha_dst[2 * i] = (alpha_dst[2 * i] & 0xf0) | alpha_val; + 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) { + if (is_premult_alpha && alpha_mask != 0x0f) { WebPApplyAlphaMultiply4444(base_rgba, width, num_lines_out, buf->stride); } return num_lines_out; @@ -471,8 +494,7 @@ static int InitRGBRescaler(const VP8Io* const io, WebPDecParams* const p) { tmp_size1 += work_size; tmp_size2 += out_width; } - p->memory = - calloc(1, tmp_size1 * sizeof(*work) + tmp_size2 * sizeof(*tmp)); + p->memory = calloc(1, tmp_size1 * sizeof(*work) + tmp_size2 * sizeof(*tmp)); if (p->memory == NULL) { return 0; // memory error } @@ -569,7 +591,7 @@ static int CustomSetup(VP8Io* io) { //------------------------------------------------------------------------------ static int CustomPut(const VP8Io* io) { - WebPDecParams* p = (WebPDecParams*)io->opaque; + WebPDecParams* const p = (WebPDecParams*)io->opaque; const int mb_w = io->mb_w; const int mb_h = io->mb_h; int num_lines_out; diff --git a/third_party/libwebp/dec/vp8.c b/third_party/libwebp/dec/vp8.c index b0ccfa2..253cb6b 100644 --- a/third_party/libwebp/dec/vp8.c +++ b/third_party/libwebp/dec/vp8.c @@ -236,20 +236,6 @@ static int ParseFilterHeader(VP8BitReader* br, VP8Decoder* const dec) { } } dec->filter_type_ = (hdr->level_ == 0) ? 0 : hdr->simple_ ? 1 : 2; - if (dec->filter_type_ > 0) { // precompute filter levels per segment - if (dec->segment_hdr_.use_segment_) { - int s; - for (s = 0; s < NUM_MB_SEGMENTS; ++s) { - int strength = dec->segment_hdr_.filter_strength_[s]; - if (!dec->segment_hdr_.absolute_delta_) { - strength += hdr->level_; - } - dec->filter_levels_[s] = strength; - } - } else { - dec->filter_levels_[0] = hdr->level_; - } - } return !br->eof_; } @@ -458,7 +444,7 @@ int VP8GetHeaders(VP8Decoder* const dec, VP8Io* const io) { //------------------------------------------------------------------------------ // Residual decoding (Paragraph 13.2 / 13.3) -static const uint8_t kBands[16 + 1] = { +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 }; @@ -474,6 +460,39 @@ static const uint8_t kZigzag[16] = { }; typedef const uint8_t (*ProbaArray)[NUM_CTX][NUM_PROBAS]; // for const-casting +typedef const uint8_t (*ProbaCtxArray)[NUM_PROBAS]; + +// See section 13-2: http://tools.ietf.org/html/rfc6386#section-13.2 +static int GetLargeValue(VP8BitReader* const br, const uint8_t* const p) { + int v; + if (!VP8GetBit(br, p[3])) { + if (!VP8GetBit(br, p[4])) { + v = 2; + } else { + v = 3 + VP8GetBit(br, p[5]); + } + } else { + if (!VP8GetBit(br, p[6])) { + if (!VP8GetBit(br, p[7])) { + v = 5 + VP8GetBit(br, 159); + } else { + v = 7 + 2 * VP8GetBit(br, 165); + v += VP8GetBit(br, 145); + } + } else { + const uint8_t* tab; + const int bit1 = VP8GetBit(br, p[8]); + const int bit0 = VP8GetBit(br, p[9 + bit1]); + const int cat = 2 * bit1 + bit0; + v = 0; + for (tab = kCat3456[cat]; *tab; ++tab) { + v += v + VP8GetBit(br, *tab); + } + v += 3 + (8 << cat); + } + } + return v; +} // Returns the position of the last non-zero coeff plus one // (and 0 if there's no coeff at all) @@ -484,54 +503,26 @@ static int GetCoeffs(VP8BitReader* const br, ProbaArray prob, if (!VP8GetBit(br, p[0])) { // first EOB is more a 'CBP' bit. return 0; } - while (1) { - ++n; + for (; n < 16; ++n) { + const ProbaCtxArray p_ctx = prob[kBands[n + 1]]; if (!VP8GetBit(br, p[1])) { - p = prob[kBands[n]][0]; + p = p_ctx[0]; } else { // non zero coeff - int v, j; + int v; if (!VP8GetBit(br, p[2])) { - p = prob[kBands[n]][1]; v = 1; + p = p_ctx[1]; } else { - if (!VP8GetBit(br, p[3])) { - if (!VP8GetBit(br, p[4])) { - v = 2; - } else { - v = 3 + VP8GetBit(br, p[5]); - } - } else { - if (!VP8GetBit(br, p[6])) { - if (!VP8GetBit(br, p[7])) { - v = 5 + VP8GetBit(br, 159); - } else { - v = 7 + 2 * VP8GetBit(br, 165); - v += VP8GetBit(br, 145); - } - } else { - const uint8_t* tab; - const int bit1 = VP8GetBit(br, p[8]); - const int bit0 = VP8GetBit(br, p[9 + bit1]); - const int cat = 2 * bit1 + bit0; - v = 0; - for (tab = kCat3456[cat]; *tab; ++tab) { - v += v + VP8GetBit(br, *tab); - } - v += 3 + (8 << cat); - } - } - p = prob[kBands[n]][2]; + v = GetLargeValue(br, p); + p = p_ctx[2]; } - j = kZigzag[n - 1]; - out[j] = VP8GetSigned(br, v) * dq[j > 0]; - if (n == 16 || !VP8GetBit(br, p[0])) { // EOB - return n; + out[kZigzag[n]] = VP8GetSigned(br, v) * dq[n > 0]; + if (n < 15 && !VP8GetBit(br, p[0])) { // EOB + return n + 1; } } - if (n == 16) { - return 16; - } } + return 16; } // Alias-safe way of converting 4bytes to 32bits. @@ -670,6 +661,12 @@ int VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br) { dec->non_zero_ac_ = 0; } + if (dec->filter_type_ > 0) { // store filter info + VP8FInfo* const finfo = dec->f_info_ + dec->mb_x_; + *finfo = dec->fstrengths_[dec->segment_][dec->is_i4x4_]; + finfo->f_inner_ = (!info->skip_ || dec->is_i4x4_); + } + return (!token_br->eof_); } @@ -693,10 +690,8 @@ static int ParseFrame(VP8Decoder* const dec, VP8Io* io) { return VP8SetError(dec, VP8_STATUS_NOT_ENOUGH_DATA, "Premature end-of-file encountered."); } + // Reconstruct and emit samples. VP8ReconstructBlock(dec); - - // Store data and save block's filtering params - VP8StoreBlock(dec); } if (!VP8ProcessRow(dec, io)) { return VP8SetError(dec, VP8_STATUS_USER_ABORT, "Output aborted."); diff --git a/third_party/libwebp/dec/vp8i.h b/third_party/libwebp/dec/vp8i.h index 4382edf..1aa9238 100644 --- a/third_party/libwebp/dec/vp8i.h +++ b/third_party/libwebp/dec/vp8i.h @@ -27,7 +27,7 @@ extern "C" { // version numbers #define DEC_MAJ_VERSION 0 -#define DEC_MIN_VERSION 2 +#define DEC_MIN_VERSION 3 #define DEC_REV_VERSION 0 #define ONLY_KEYFRAME_CODE // to remove any code related to P-Frames @@ -157,7 +157,7 @@ typedef struct { // filter specs } VP8FInfo; typedef struct { // used for syntax-parsing - unsigned int nz_; // non-zero AC/DC coeffs + unsigned int nz_:24; // non-zero AC/DC coeffs (24bit) unsigned int dc_nz_:1; // non-zero DC coeffs unsigned int skip_:1; // block type } VP8MB; @@ -269,9 +269,9 @@ struct VP8Decoder { uint32_t non_zero_ac_; // Filtering side-info - int filter_type_; // 0=off, 1=simple, 2=complex - int filter_row_; // per-row flag - uint8_t filter_levels_[NUM_MB_SEGMENTS]; // precalculated per-segment + int filter_type_; // 0=off, 1=simple, 2=complex + int filter_row_; // per-row flag + VP8FInfo fstrengths_[NUM_MB_SEGMENTS][2]; // precalculated per-segment/type // extensions const uint8_t* alpha_data_; // compressed alpha data (if present) @@ -312,8 +312,6 @@ VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io); int VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io); // Process the last decoded row (filtering + output) int VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io); -// Store a block, along with filtering params -void VP8StoreBlock(VP8Decoder* const dec); // To be called at the start of a new scanline, to initialize predictors. void VP8InitScanline(VP8Decoder* const dec); // Decode one macroblock. Returns false if there is not enough data. diff --git a/third_party/libwebp/dec/vp8l.c b/third_party/libwebp/dec/vp8l.c index 70edbeb..5659cb5 100644 --- a/third_party/libwebp/dec/vp8l.c +++ b/third_party/libwebp/dec/vp8l.c @@ -149,31 +149,22 @@ static WEBP_INLINE int PlaneCodeToDistance(int xsize, int plane_code) { //------------------------------------------------------------------------------ // Decodes the next Huffman code from bit-stream. // FillBitWindow(br) needs to be called at minimum every second call -// to ReadSymbolUnsafe. -static int ReadSymbolUnsafe(const HuffmanTree* tree, VP8LBitReader* const br) { +// to ReadSymbol, in order to pre-fetch enough bits. +static WEBP_INLINE int ReadSymbol(const HuffmanTree* tree, + VP8LBitReader* const br) { const HuffmanTreeNode* node = tree->root_; + int num_bits = 0; + uint32_t bits = VP8LPrefetchBits(br); assert(node != NULL); while (!HuffmanTreeNodeIsLeaf(node)) { - node = HuffmanTreeNextNode(node, VP8LReadOneBitUnsafe(br)); + node = HuffmanTreeNextNode(node, bits & 1); + bits >>= 1; + ++num_bits; } + VP8LDiscardBits(br, num_bits); return node->symbol_; } -static WEBP_INLINE int ReadSymbol(const HuffmanTree* tree, - VP8LBitReader* const br) { - const int read_safe = (br->pos_ + 8 > br->len_); - if (!read_safe) { - return ReadSymbolUnsafe(tree, br); - } else { - const HuffmanTreeNode* node = tree->root_; - assert(node != NULL); - while (!HuffmanTreeNodeIsLeaf(node)) { - node = HuffmanTreeNextNode(node, VP8LReadOneBit(br)); - } - return node->symbol_; - } -} - static int ReadHuffmanCodeLengths( VP8LDecoder* const dec, const int* const code_length_code_lengths, int num_symbols, int* const code_lengths) { @@ -327,10 +318,10 @@ static int ReadHuffmanCodes(VP8LDecoder* const dec, int xsize, int ysize, hdr->huffman_subsample_bits_ = huffman_precision; for (i = 0; i < huffman_pixs; ++i) { // The huffman data is stored in red and green bytes. - const int index = (huffman_image[i] >> 8) & 0xffff; - huffman_image[i] = index; - if (index >= num_htree_groups) { - num_htree_groups = index + 1; + const int group = (huffman_image[i] >> 8) & 0xffff; + huffman_image[i] = group; + if (group >= num_htree_groups) { + num_htree_groups = group + 1; } } } @@ -615,20 +606,22 @@ static WEBP_INLINE HTreeGroup* GetHtreeGroupForPos(VP8LMetadata* const hdr, typedef void (*ProcessRowsFunc)(VP8LDecoder* const dec, int row); -static void ApplyTransforms(VP8LDecoder* const dec, int num_rows, - const uint32_t* const rows) { +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; - uint32_t* rows_data = dec->argb_cache_; 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_data, rows, cache_pixs * sizeof(*rows_data)); + 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, rows_data); + VP8LInverseTransform(transform, start_row, end_row, rows_in, rows_out); + rows_in = rows_out; } } @@ -639,7 +632,7 @@ static void ProcessRows(VP8LDecoder* const dec, int row) { const int num_rows = row - dec->last_row_; if (num_rows <= 0) return; // Nothing to be done. - ApplyTransforms(dec, num_rows, rows); + ApplyInverseTransforms(dec, num_rows, rows); // Emit output. { @@ -797,19 +790,6 @@ static void ClearTransform(VP8LTransform* const transform) { transform->data_ = NULL; } -static void ApplyInverseTransforms(VP8LDecoder* const dec, int start_idx, - uint32_t* const decoded_data) { - int n = dec->next_transform_; - assert(start_idx >= 0); - while (n-- > start_idx) { - VP8LTransform* const transform = &dec->transforms_[n]; - VP8LInverseTransform(transform, 0, transform->ysize_, - decoded_data, decoded_data); - ClearTransform(transform); - } - dec->next_transform_ = start_idx; -} - // 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) { @@ -964,7 +944,6 @@ static int DecodeImageStream(int xsize, int ysize, VP8LBitReader* const br = &dec->br_; VP8LMetadata* const hdr = &dec->hdr_; uint32_t* data = NULL; - const int transform_start_idx = dec->next_transform_; int color_cache_bits = 0; // Read the transforms (may recurse). @@ -1024,9 +1003,6 @@ static int DecodeImageStream(int xsize, int ysize, ok = DecodeImageData(dec, data, transform_xsize, transform_ysize, NULL); ok = ok && !br->error_; - // Apply transforms on the decoded data. - if (ok) ApplyInverseTransforms(dec, transform_start_idx, data); - End: if (!ok) { @@ -1083,7 +1059,7 @@ static void ExtractAlphaRows(VP8LDecoder* const dec, int row) { const uint32_t* const in = dec->argb_ + dec->width_ * dec->last_row_; if (num_rows <= 0) return; // Nothing to be done. - ApplyTransforms(dec, num_rows, in); + ApplyInverseTransforms(dec, num_rows, in); // Extract alpha (which is stored in the green plane). { diff --git a/third_party/libwebp/dec/webp.c b/third_party/libwebp/dec/webp.c index 7455da9..39d9018 100644 --- a/third_party/libwebp/dec/webp.c +++ b/third_party/libwebp/dec/webp.c @@ -14,7 +14,7 @@ #include "./vp8i.h" #include "./vp8li.h" #include "./webpi.h" -#include "../webp/format_constants.h" +#include "../webp/mux_types.h" // ALPHA_FLAG #if defined(__cplusplus) || defined(c_plusplus) extern "C" { @@ -40,8 +40,8 @@ extern "C" { // 20..23 VP8X flags bit-map corresponding to the chunk-types present. // 24..26 Width of the Canvas Image. // 27..29 Height of the Canvas Image. -// There can be extra chunks after the "VP8X" chunk (ICCP, TILE, FRM, VP8, -// META ...) +// There can be extra chunks after the "VP8X" chunk (ICCP, FRGM, ANMF, VP8, +// VP8L, XMP, EXIF ...) // All sizes are in little-endian order. // Note: chunk data size must be padded to multiple of 2 when written. @@ -276,6 +276,7 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, int* const width, int* const height, int* const has_alpha, + int* const has_animation, WebPHeaderStructure* const headers) { int found_riff = 0; int found_vp8x = 0; @@ -308,7 +309,8 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, // necessary to send VP8X chunk to the decoder. return VP8_STATUS_BITSTREAM_ERROR; } - if (has_alpha != NULL) *has_alpha = !!(flags & ALPHA_FLAG_BIT); + if (has_alpha != NULL) *has_alpha = !!(flags & ALPHA_FLAG); + if (has_animation != NULL) *has_animation = !!(flags & ANIMATION_FLAG); if (found_vp8x && headers == NULL) { return VP8_STATUS_OK; // Return features from VP8X header. } @@ -370,10 +372,19 @@ static VP8StatusCode ParseHeadersInternal(const uint8_t* data, } VP8StatusCode WebPParseHeaders(WebPHeaderStructure* const headers) { + VP8StatusCode status; + int has_animation = 0; assert(headers != NULL); // fill out headers, ignore width/height/has_alpha. - return ParseHeadersInternal(headers->data, headers->data_size, - NULL, NULL, NULL, headers); + status = ParseHeadersInternal(headers->data, headers->data_size, + NULL, NULL, NULL, &has_animation, 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; } //------------------------------------------------------------------------------ @@ -625,10 +636,11 @@ static VP8StatusCode GetFeatures(const uint8_t* const data, size_t data_size, } DefaultFeatures(features); - // Only parse enough of the data to retrieve width/height/has_alpha. + // Only parse enough of the data to retrieve the features. return ParseHeadersInternal(data, data_size, &features->width, &features->height, - &features->has_alpha, NULL); + &features->has_alpha, &features->has_animation, + NULL); } //------------------------------------------------------------------------------ @@ -672,19 +684,13 @@ int WebPInitDecoderConfigInternal(WebPDecoderConfig* config, VP8StatusCode WebPGetFeaturesInternal(const uint8_t* data, size_t data_size, WebPBitstreamFeatures* features, int version) { - VP8StatusCode status; if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_DECODER_ABI_VERSION)) { return VP8_STATUS_INVALID_PARAM; // version mismatch } if (features == NULL) { return VP8_STATUS_INVALID_PARAM; } - - status = GetFeatures(data, data_size, features); - if (status == VP8_STATUS_NOT_ENOUGH_DATA) { - return VP8_STATUS_BITSTREAM_ERROR; // Not-enough-data treated as error. - } - return status; + return GetFeatures(data, data_size, features); } VP8StatusCode WebPDecode(const uint8_t* data, size_t data_size, diff --git a/third_party/libwebp/demux/demux.c b/third_party/libwebp/demux/demux.c new file mode 100644 index 0000000..8e8ca39 --- /dev/null +++ b/third_party/libwebp/demux/demux.c @@ -0,0 +1,952 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// WebP container demux. +// + +#ifdef HAVE_CONFIG_H +#include "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" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define DMUX_MAJ_VERSION 0 +#define DMUX_MIN_VERSION 1 +#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 duration_; + WebPMuxAnimDispose dispose_method_; + int is_fragment_; // this is a frame fragment (and not a full frame). + int frame_num_; // the referent frame number for use in assembling fragments. + 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_; + Chunk* chunks_; // non-image chunks +}; + +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) { + Chunk** c = &dmux->chunks_; + while (*c != NULL) c = &(*c)->next_; + *c = chunk; + chunk->next_ = NULL; +} + +// 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* last_frame = NULL; + Frame** f = &dmux->frames_; + while (*f != NULL) { + last_frame = *f; + f = &(*f)->next_; + } + if (last_frame != NULL && !last_frame->complete_) return 0; + *f = frame; + frame->next_ = NULL; + return 1; +} + +// Store image bearing chunks to 'frame'. +// If 'has_vp8l_alpha' is not NULL, it will be set to true if the frame is a +// lossless image with alpha. +static ParseStatus StoreFrame(int frame_num, uint32_t min_size, + MemBuffer* const mem, Frame* const frame, + int* const has_vp8l_alpha) { + int alpha_chunks = 0; + int image_chunks = 0; + int done = (MemDataSize(mem) < min_size); + ParseStatus status = PARSE_OK; + + if (has_vp8l_alpha != NULL) *has_vp8l_alpha = 0; // Default. + + 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->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; + frame->img_components_[0].offset_ = chunk_start_offset; + frame->img_components_[0].size_ = chunk_size; + frame->width_ = features.width; + frame->height_ = features.height; + if (has_vp8l_alpha != NULL) *has_vp8l_alpha = features.has_alpha; + frame->frame_num_ = frame_num; + frame->complete_ = (status == PARSE_OK); + 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*)calloc(1, 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 has_frames = !!(dmux->feature_flags_ & ANIMATION_FLAG); + const uint32_t anmf_payload_size = frame_chunk_size - ANMF_CHUNK_SIZE; + int added_frame = 0; + 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); + frame->dispose_method_ = (WebPMuxAnimDispose)(ReadByte(mem) & 1); + if (frame->width_ * (uint64_t)frame->height_ >= MAX_IMAGE_AREA) { + 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, + NULL); + if (status != PARSE_ERROR && has_frames && frame->frame_num_ > 0) { + added_frame = AddFrame(dmux, frame); + if (added_frame) { + ++dmux->num_frames_; + } else { + status = PARSE_ERROR; + } + } + + if (!added_frame) free(frame); + return status; +} + +#ifdef WEBP_EXPERIMENTAL_FEATURES +// Parse a 'FRGM' chunk and any image bearing chunks that immediately follow. +// 'fragment_chunk_size' is the previously validated, padded chunk size. +static ParseStatus ParseFragment(WebPDemuxer* const dmux, + uint32_t fragment_chunk_size) { + const int frame_num = 1; // All fragments belong to the 1st (and only) frame. + const int has_fragments = !!(dmux->feature_flags_ & FRAGMENTS_FLAG); + const uint32_t frgm_payload_size = fragment_chunk_size - FRGM_CHUNK_SIZE; + int added_fragment = 0; + MemBuffer* const mem = &dmux->mem_; + Frame* frame; + ParseStatus status = + NewFrame(mem, FRGM_CHUNK_SIZE, fragment_chunk_size, &frame); + if (status != PARSE_OK) return status; + + frame->is_fragment_ = 1; + frame->x_offset_ = 2 * ReadLE24s(mem); + frame->y_offset_ = 2 * ReadLE24s(mem); + + // Store a fragment only if the fragments flag is set there is some data for + // this fragment is available. + status = StoreFrame(frame_num, frgm_payload_size, mem, frame, NULL); + if (status != PARSE_ERROR && has_fragments && frame->frame_num_ > 0) { + added_fragment = AddFrame(dmux, frame); + if (!added_fragment) { + status = PARSE_ERROR; + } else { + dmux->num_frames_ = 1; + } + } + + if (!added_fragment) free(frame); + return status; +} +#endif // WEBP_EXPERIMENTAL_FEATURES + +// 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*)calloc(1, 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 int 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 0; + if (memcmp(GetBuffer(mem), "RIFF", CHUNK_SIZE_BYTES) || + memcmp(GetBuffer(mem) + CHUNK_HEADER_SIZE, "WEBP", CHUNK_SIZE_BYTES)) { + return 0; + } + + riff_size = GetLE32(GetBuffer(mem) + TAG_SIZE); + if (riff_size < CHUNK_HEADER_SIZE) return 0; + if (riff_size > MAX_CHUNK_PAYLOAD) return 0; + + // 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 1; +} + +static ParseStatus ParseSingleImage(WebPDemuxer* const dmux) { + const size_t min_size = CHUNK_HEADER_SIZE; + MemBuffer* const mem = &dmux->mem_; + Frame* frame; + ParseStatus status; + int has_vp8l_alpha = 0; // Frame contains a lossless image with alpha. + + 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*)calloc(1, 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, + &has_vp8l_alpha); + 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; + } + + // 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_ |= has_vp8l_alpha ? ALPHA_FLAG : 0; + } + AddFrame(dmux, frame); + dmux->num_frames_ = 1; + } else { + free(frame); + } + + return status; +} + +static ParseStatus ParseVP8X(WebPDemuxer* const dmux) { + MemBuffer* const mem = &dmux->mem_; + int anim_chunks = 0; + uint32_t vp8x_size; + ParseStatus status = PARSE_OK; + + 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; + + 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) 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; + } +#ifdef WEBP_EXPERIMENTAL_FEATURES + case MKFOURCC('F', 'R', 'G', 'M'): { + status = ParseFragment(dmux, chunk_size_padded); + break; + } +#endif + case MKFOURCC('I', 'C', 'C', 'P'): { + store_chunk = !!(dmux->feature_flags_ & ICCP_FLAG); + goto Skip; + } + case MKFOURCC('X', 'M', 'P', ' '): { + store_chunk = !!(dmux->feature_flags_ & XMP_FLAG); + goto Skip; + } + case MKFOURCC('E', 'X', 'I', 'F'): { + store_chunk = !!(dmux->feature_flags_ & EXIF_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; +} + +// ----------------------------------------------------------------------------- +// 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; +} + +static int IsValidExtendedFormat(const WebPDemuxer* const dmux) { + const int has_fragments = !!(dmux->feature_flags_ & FRAGMENTS_FLAG); + const int has_frames = !!(dmux->feature_flags_ & ANIMATION_FLAG); + const Frame* f; + + 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; + + for (f = dmux->frames_; f != NULL; f = f->next_) { + const int cur_frame_set = f->frame_num_; + int frame_count = 0, fragment_count = 0; + + // Check frame properties and if the image is composed of fragments that + // each fragment came from a fragment. + 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 (!has_fragments && f->is_fragment_) return 0; + if (!has_frames && f->frame_num_ > 1) return 0; + if (f->x_offset_ < 0 || f->y_offset_ < 0) 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; + } + + fragment_count += f->is_fragment_; + ++frame_count; + } + if (!has_fragments && frame_count > 1) return 0; + if (fragment_count > 0 && frame_count != fragment_count) return 0; + if (f == NULL) break; + } + 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->mem_ = *mem; +} + +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 (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; + if (!ReadHeader(&mem)) return NULL; + + partial = (mem.buf_size_ < mem.riff_end_); + if (!allow_partial && partial) return NULL; + + dmux = (WebPDemuxer*)calloc(1, sizeof(*dmux)); + if (dmux == NULL) return NULL; + InitDemux(dmux, &mem); + + 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; + break; + } + } + if (state) *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_; + free(cur_frame); + } + for (c = dmux->chunks_; c != NULL;) { + Chunk* const cur_chunk = c; + c = c->next_; + free(cur_chunk); + } + free(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 + +// Find the first 'frame_num' frame. There may be multiple such frames in a +// fragmented frame. +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; +} + +// Returns fragment 'fragment_num' and the total count. +static const Frame* GetFragment( + const Frame* const frame_set, int fragment_num, int* const count) { + const int this_frame = frame_set->frame_num_; + const Frame* f = frame_set; + const Frame* fragment = NULL; + int total; + + for (total = 0; f != NULL && f->frame_num_ == this_frame; f = f->next_) { + if (++total == fragment_num) fragment = f; + } + *count = total; + return fragment; +} + +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 first_frame, + int fragment_num, WebPIterator* const iter) { + const uint8_t* const mem_buf = dmux->mem_.buf_; + int num_fragments; + size_t payload_size = 0; + const Frame* const fragment = + GetFragment(first_frame, fragment_num, &num_fragments); + const uint8_t* const payload = + GetFramePayload(mem_buf, fragment, &payload_size); + if (payload == NULL) return 0; + assert(first_frame != NULL); + + iter->frame_num = first_frame->frame_num_; + iter->num_frames = dmux->num_frames_; + iter->fragment_num = fragment_num; + iter->num_fragments = num_fragments; + iter->x_offset = fragment->x_offset_; + iter->y_offset = fragment->y_offset_; + iter->width = fragment->width_; + iter->height = fragment->height_; + iter->duration = fragment->duration_; + iter->dispose_method = fragment->dispose_method_; + iter->complete = fragment->complete_; + iter->fragment.bytes = payload; + iter->fragment.size = payload_size; + // TODO(jzern): adjust offsets for 'FRGM's embedded in 'ANMF's + 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, 1, 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); +} + +int WebPDemuxSelectFragment(WebPIterator* iter, int fragment_num) { + if (iter != NULL && iter->private_ != NULL && fragment_num > 0) { + const WebPDemuxer* const dmux = (WebPDemuxer*)iter->private_; + const Frame* const frame = GetFrame(dmux, iter->frame_num); + if (frame == NULL) return 0; + + return SynthesizeFrame(dmux, frame, fragment_num, iter); + } + return 0; +} + +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; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/third_party/libwebp/dsp/dec.c b/third_party/libwebp/dsp/dec.c index 9ae7b6f..758c6a5 100644 --- a/third_party/libwebp/dsp/dec.c +++ b/third_party/libwebp/dsp/dec.c @@ -426,11 +426,16 @@ static void HE8uv(uint8_t *dst) { // horizontal } // helper for chroma-DC predictions -static WEBP_INLINE void Put8x8uv(uint64_t v, uint8_t* dst) { +static WEBP_INLINE void Put8x8uv(uint8_t value, uint8_t* dst) { int j; +#ifndef WEBP_REFERENCE_IMPLEMENTATION + const uint64_t v = (uint64_t)value * 0x0101010101010101ULL; for (j = 0; j < 8; ++j) { *(uint64_t*)(dst + j * BPS) = v; } +#else + for (j = 0; j < 8; ++j) memset(dst + j * BPS, value, 8); +#endif } static void DC8uv(uint8_t *dst) { // DC @@ -439,7 +444,7 @@ static void DC8uv(uint8_t *dst) { // DC for (i = 0; i < 8; ++i) { dc0 += dst[i - BPS] + dst[-1 + i * BPS]; } - Put8x8uv((uint64_t)((dc0 >> 4) * 0x0101010101010101ULL), dst); + Put8x8uv(dc0 >> 4, dst); } static void DC8uvNoLeft(uint8_t *dst) { // DC with no left samples @@ -448,7 +453,7 @@ static void DC8uvNoLeft(uint8_t *dst) { // DC with no left samples for (i = 0; i < 8; ++i) { dc0 += dst[i - BPS]; } - Put8x8uv((uint64_t)((dc0 >> 3) * 0x0101010101010101ULL), dst); + Put8x8uv(dc0 >> 3, dst); } static void DC8uvNoTop(uint8_t *dst) { // DC with no top samples @@ -457,11 +462,11 @@ static void DC8uvNoTop(uint8_t *dst) { // DC with no top samples for (i = 0; i < 8; ++i) { dc0 += dst[-1 + i * BPS]; } - Put8x8uv((uint64_t)((dc0 >> 3) * 0x0101010101010101ULL), dst); + Put8x8uv(dc0 >> 3, dst); } static void DC8uvNoTopLeft(uint8_t *dst) { // DC with nothing - Put8x8uv(0x8080808080808080ULL, dst); + Put8x8uv(0x80, dst); } //------------------------------------------------------------------------------ diff --git a/third_party/libwebp/dsp/dec_neon.c b/third_party/libwebp/dsp/dec_neon.c index ec824b7..5d7cff1 100644 --- a/third_party/libwebp/dsp/dec_neon.c +++ b/third_party/libwebp/dsp/dec_neon.c @@ -12,14 +12,14 @@ #include "./dsp.h" -#if defined(WEBP_USE_NEON) - -#include "../dec/vp8i.h" - #if defined(__cplusplus) || defined(c_plusplus) extern "C" { #endif +#if defined(WEBP_USE_NEON) + +#include "../dec/vp8i.h" + #define QRegs "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", \ "q8", "q9", "q10", "q11", "q12", "q13", "q14", "q15" @@ -155,6 +155,9 @@ static void SimpleHFilter16iNEON(uint8_t* p, int stride, int thresh) { } } +//----------------------------------------------------------------------------- +// Inverse transforms (Paragraph 14.4) + static void TransformOneNEON(const int16_t *in, uint8_t *dst) { const int kBPS = BPS; const int16_t constants[] = {20091, 17734, 0, 0}; @@ -311,19 +314,92 @@ static void TransformTwoNEON(const int16_t* in, uint8_t* dst, int do_two) { } } +static void TransformWHT(const int16_t* in, int16_t* out) { + const int kStep = 32; // The store is only incrementing the pointer as if we + // had stored a single byte. + __asm__ volatile ( + // part 1 + // load data into q0, q1 + "vld1.16 {q0, q1}, [%[in]] \n" + + "vaddl.s16 q2, d0, d3 \n" // a0 = in[0] + in[12] + "vaddl.s16 q3, d1, d2 \n" // a1 = in[4] + in[8] + "vsubl.s16 q4, d1, d2 \n" // a2 = in[4] - in[8] + "vsubl.s16 q5, d0, d3 \n" // a3 = in[0] - in[12] + + "vadd.s32 q0, q2, q3 \n" // tmp[0] = a0 + a1 + "vsub.s32 q2, q2, q3 \n" // tmp[8] = a0 - a1 + "vadd.s32 q1, q5, q4 \n" // tmp[4] = a3 + a2 + "vsub.s32 q3, q5, q4 \n" // tmp[12] = a3 - a2 + + // Transpose + // q0 = tmp[0, 4, 8, 12], q1 = tmp[2, 6, 10, 14] + // q2 = tmp[1, 5, 9, 13], q3 = tmp[3, 7, 11, 15] + "vswp d1, d4 \n" // vtrn.64 q0, q2 + "vswp d3, d6 \n" // vtrn.64 q1, q3 + "vtrn.32 q0, q1 \n" + "vtrn.32 q2, q3 \n" + + "vmov.s32 q4, #3 \n" // dc = 3 + "vadd.s32 q0, q0, q4 \n" // dc = tmp[0] + 3 + "vadd.s32 q6, q0, q3 \n" // a0 = dc + tmp[3] + "vadd.s32 q7, q1, q2 \n" // a1 = tmp[1] + tmp[2] + "vsub.s32 q8, q1, q2 \n" // a2 = tmp[1] - tmp[2] + "vsub.s32 q9, q0, q3 \n" // a3 = dc - tmp[3] + + "vadd.s32 q0, q6, q7 \n" + "vshrn.s32 d0, q0, #3 \n" // (a0 + a1) >> 3 + "vadd.s32 q1, q9, q8 \n" + "vshrn.s32 d1, q1, #3 \n" // (a3 + a2) >> 3 + "vsub.s32 q2, q6, q7 \n" + "vshrn.s32 d2, q2, #3 \n" // (a0 - a1) >> 3 + "vsub.s32 q3, q9, q8 \n" + "vshrn.s32 d3, q3, #3 \n" // (a3 - a2) >> 3 + + // set the results to output + "vst1.16 d0[0], [%[out]], %[kStep] \n" + "vst1.16 d1[0], [%[out]], %[kStep] \n" + "vst1.16 d2[0], [%[out]], %[kStep] \n" + "vst1.16 d3[0], [%[out]], %[kStep] \n" + "vst1.16 d0[1], [%[out]], %[kStep] \n" + "vst1.16 d1[1], [%[out]], %[kStep] \n" + "vst1.16 d2[1], [%[out]], %[kStep] \n" + "vst1.16 d3[1], [%[out]], %[kStep] \n" + "vst1.16 d0[2], [%[out]], %[kStep] \n" + "vst1.16 d1[2], [%[out]], %[kStep] \n" + "vst1.16 d2[2], [%[out]], %[kStep] \n" + "vst1.16 d3[2], [%[out]], %[kStep] \n" + "vst1.16 d0[3], [%[out]], %[kStep] \n" + "vst1.16 d1[3], [%[out]], %[kStep] \n" + "vst1.16 d2[3], [%[out]], %[kStep] \n" + "vst1.16 d3[3], [%[out]], %[kStep] \n" + + : [out] "+r"(out) // modified registers + : [in] "r"(in), [kStep] "r"(kStep) // constants + : "memory", "q0", "q1", "q2", "q3", "q4", + "q5", "q6", "q7", "q8", "q9" // clobbered + ); +} + +#endif // WEBP_USE_NEON + +//------------------------------------------------------------------------------ +// Entry point + extern void VP8DspInitNEON(void); void VP8DspInitNEON(void) { +#if defined(WEBP_USE_NEON) VP8Transform = TransformTwoNEON; + VP8TransformWHT = TransformWHT; VP8SimpleVFilter16 = SimpleVFilter16NEON; VP8SimpleHFilter16 = SimpleHFilter16NEON; VP8SimpleVFilter16i = SimpleVFilter16iNEON; VP8SimpleHFilter16i = SimpleHFilter16iNEON; +#endif // WEBP_USE_NEON } #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif - -#endif // WEBP_USE_NEON diff --git a/third_party/libwebp/dsp/dec_sse2.c b/third_party/libwebp/dsp/dec_sse2.c index 472b68e..1cac1b8 100644 --- a/third_party/libwebp/dsp/dec_sse2.c +++ b/third_party/libwebp/dsp/dec_sse2.c @@ -12,15 +12,15 @@ #include "./dsp.h" +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + #if defined(WEBP_USE_SSE2) #include <emmintrin.h> #include "../dec/vp8i.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - //------------------------------------------------------------------------------ // Transforms (Paragraph 14.4) @@ -194,7 +194,7 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { // Add inverse transform to 'dst' and store. { - const __m128i zero = _mm_set1_epi16(0); + const __m128i zero = _mm_setzero_si128(); // Load the reference(s). __m128i dst0, dst1, dst2, dst3; if (do_two) { @@ -278,14 +278,14 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { #define GET_NOTHEV(p1, p0, q0, q1, hev_thresh, not_hev) { \ const __m128i zero = _mm_setzero_si128(); \ - const __m128i t1 = MM_ABS(p1, p0); \ - const __m128i t2 = MM_ABS(q1, q0); \ + const __m128i t_1 = MM_ABS(p1, p0); \ + const __m128i t_2 = MM_ABS(q1, q0); \ \ const __m128i h = _mm_set1_epi8(hev_thresh); \ - const __m128i t3 = _mm_subs_epu8(t1, h); /* abs(p1 - p0) - hev_tresh */ \ - const __m128i t4 = _mm_subs_epu8(t2, h); /* abs(q1 - q0) - hev_tresh */ \ + const __m128i t_3 = _mm_subs_epu8(t_1, h); /* abs(p1 - p0) - hev_tresh */ \ + const __m128i t_4 = _mm_subs_epu8(t_2, h); /* abs(q1 - q0) - hev_tresh */ \ \ - not_hev = _mm_or_si128(t3, t4); \ + not_hev = _mm_or_si128(t_3, t_4); \ not_hev = _mm_cmpeq_epi8(not_hev, zero); /* not_hev <= t1 && not_hev <= t2 */\ } @@ -314,13 +314,13 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { // Updates values of 2 pixels at MB edge during complex filtering. // Update operations: -// q = q - a and p = p + a; where a = [(a_hi >> 7), (a_lo >> 7)] +// q = q - delta and p = p + delta; where delta = [(a_hi >> 7), (a_lo >> 7)] #define UPDATE_2PIXELS(pi, qi, a_lo, a_hi) { \ const __m128i a_lo7 = _mm_srai_epi16(a_lo, 7); \ const __m128i a_hi7 = _mm_srai_epi16(a_hi, 7); \ - const __m128i a = _mm_packs_epi16(a_lo7, a_hi7); \ - pi = _mm_adds_epi8(pi, a); \ - qi = _mm_subs_epi8(qi, a); \ + const __m128i delta = _mm_packs_epi16(a_lo7, a_hi7); \ + pi = _mm_adds_epi8(pi, delta); \ + qi = _mm_subs_epi8(qi, delta); \ } static void NeedsFilter(const __m128i* p1, const __m128i* p0, const __m128i* q0, @@ -876,9 +876,15 @@ static void HFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, Store16x4(u, v, stride, &p1, &p0, &q0, &q1); } +#endif // WEBP_USE_SSE2 + +//------------------------------------------------------------------------------ +// Entry point + extern void VP8DspInitSSE2(void); void VP8DspInitSSE2(void) { +#if defined(WEBP_USE_SSE2) VP8Transform = TransformSSE2; VP8VFilter16 = VFilter16SSE2; @@ -894,10 +900,9 @@ void VP8DspInitSSE2(void) { VP8SimpleHFilter16 = SimpleHFilter16SSE2; VP8SimpleVFilter16i = SimpleVFilter16iSSE2; VP8SimpleHFilter16i = SimpleHFilter16iSSE2; +#endif // WEBP_USE_SSE2 } #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif - -#endif // WEBP_USE_SSE2 diff --git a/third_party/libwebp/dsp/dsp.h b/third_party/libwebp/dsp/dsp.h index 24d0c18..933df60 100644 --- a/third_party/libwebp/dsp/dsp.h +++ b/third_party/libwebp/dsp/dsp.h @@ -49,8 +49,6 @@ extern VP8CPUInfo VP8GetCPUInfo; //------------------------------------------------------------------------------ // Encoding -int VP8GetAlpha(const int histo[]); - // Transforms // VP8Idct: Does one of two inverse transforms. If do_two is set, the transforms // will be done for (ref, in, dst) and (ref + 4, in + 16, dst + 4). @@ -85,10 +83,11 @@ typedef int (*VP8QuantizeBlock)(int16_t in[16], int16_t out[16], int n, const struct VP8Matrix* const mtx); extern VP8QuantizeBlock VP8EncQuantizeBlock; -// Compute susceptibility based on DCT-coeff histograms: -// the higher, the "easier" the macroblock is to compress. -typedef int (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, - int start_block, int end_block); +// Collect histogram for susceptibility calculation and accumulate in histo[]. +struct VP8Histogram; +typedef void (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block, + struct VP8Histogram* const histo); extern const int VP8DspScan[16 + 4 + 4]; extern VP8CHisto VP8CollectHistogram; @@ -104,7 +103,7 @@ extern VP8DecIdct2 VP8Transform; extern VP8DecIdct VP8TransformUV; extern VP8DecIdct VP8TransformDC; extern VP8DecIdct VP8TransformDCUV; -extern void (*VP8TransformWHT)(const int16_t* in, int16_t* out); +extern VP8WHT VP8TransformWHT; // *dst is the destination block, with stride BPS. Boundary samples are // assumed accessible when needed. @@ -159,6 +158,9 @@ extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; // Initializes SSE2 version of the fancy upsamplers. void WebPInitUpsamplersSSE2(void); +// NEON version +void WebPInitUpsamplersNEON(void); + #endif // FANCY_UPSAMPLING // Point-sampling methods. @@ -200,6 +202,7 @@ extern void (*WebPApplyAlphaMultiply4444)( void WebPInitPremultiply(void); void WebPInitPremultiplySSE2(void); // should not be called directly. +void WebPInitPremultiplyNEON(void); //------------------------------------------------------------------------------ diff --git a/third_party/libwebp/dsp/enc.c b/third_party/libwebp/dsp/enc.c index 0223456..ae2c830 100644 --- a/third_party/libwebp/dsp/enc.c +++ b/third_party/libwebp/dsp/enc.c @@ -17,31 +17,18 @@ extern "C" { #endif -//------------------------------------------------------------------------------ -// Compute susceptibility based on DCT-coeff histograms: -// the higher, the "easier" the macroblock is to compress. - -static int ClipAlpha(int alpha) { - return alpha < 0 ? 0 : alpha > 255 ? 255 : alpha; +static WEBP_INLINE uint8_t clip_8b(int v) { + return (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255; } -int VP8GetAlpha(const int histo[MAX_COEFF_THRESH + 1]) { - int num = 0, den = 0, val = 0; - int k; - int alpha; - // note: changing this loop to avoid the numerous "k + 1" slows things down. - for (k = 0; k < MAX_COEFF_THRESH; ++k) { - if (histo[k + 1]) { - val += histo[k + 1]; - num += val * (k + 1); - den += (k + 1) * (k + 1); - } - } - // we scale the value to a usable [0..255] range - alpha = den ? 10 * num / den - 5 : 0; - return ClipAlpha(alpha); +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, @@ -53,27 +40,23 @@ const int VP8DspScan[16 + 4 + 4] = { 8 + 0 * BPS, 12 + 0 * BPS, 8 + 4 * BPS, 12 + 4 * BPS // V }; -static int CollectHistogram(const uint8_t* ref, const uint8_t* pred, - int start_block, int end_block) { - int histo[MAX_COEFF_THRESH + 1] = { 0 }; - int16_t out[16]; - int j, k; +static void CollectHistogram(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block, + VP8Histogram* const histo) { + int j; for (j = start_block; j < end_block; ++j) { - VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); + int k; + int16_t out[16]; - // Convert coefficients to bin (within out[]). - for (k = 0; k < 16; ++k) { - const int v = abs(out[k]) >> 2; - out[k] = (v > MAX_COEFF_THRESH) ? MAX_COEFF_THRESH : v; - } + VP8FTransform(ref + VP8DspScan[j], pred + VP8DspScan[j], out); - // Use bin to update histogram. + // Convert coefficients to bin. for (k = 0; k < 16; ++k) { - histo[out[k]]++; + const int v = abs(out[k]) >> 3; // TODO(skal): add rounding? + const int clipped_value = clip_max(v, MAX_COEFF_THRESH); + histo->distribution[clipped_value]++; } } - - return VP8GetAlpha(histo); } //------------------------------------------------------------------------------ @@ -89,15 +72,12 @@ static void InitTables(void) { if (!tables_ok) { int i; for (i = -255; i <= 255 + 255; ++i) { - clip1[255 + i] = (i < 0) ? 0 : (i > 255) ? 255 : i; + clip1[255 + i] = clip_8b(i); } tables_ok = 1; } } -static WEBP_INLINE uint8_t clip_8b(int v) { - return (!(v & ~0xff)) ? v : v < 0 ? 0 : 255; -} //------------------------------------------------------------------------------ // Transforms (Paragraph 14.4) @@ -154,25 +134,25 @@ static void FTransform(const uint8_t* src, const uint8_t* ref, int16_t* out) { int i; int tmp[16]; for (i = 0; i < 4; ++i, src += BPS, ref += BPS) { - const int d0 = src[0] - ref[0]; + const int d0 = src[0] - ref[0]; // 9bit dynamic range ([-255,255]) const int d1 = src[1] - ref[1]; const int d2 = src[2] - ref[2]; const int d3 = src[3] - ref[3]; - const int a0 = (d0 + d3) << 3; - const int a1 = (d1 + d2) << 3; - const int a2 = (d1 - d2) << 3; - const int a3 = (d0 - d3) << 3; - tmp[0 + i * 4] = (a0 + a1); - tmp[1 + i * 4] = (a2 * 2217 + a3 * 5352 + 14500) >> 12; - tmp[2 + i * 4] = (a0 - a1); - tmp[3 + i * 4] = (a3 * 2217 - a2 * 5352 + 7500) >> 12; + const int a0 = (d0 + d3); // 10b [-510,510] + const int a1 = (d1 + d2); + const int a2 = (d1 - d2); + const int a3 = (d0 - d3); + tmp[0 + i * 4] = (a0 + a1) << 3; // 14b [-8160,8160] + tmp[1 + i * 4] = (a2 * 2217 + a3 * 5352 + 1812) >> 9; // [-7536,7542] + tmp[2 + i * 4] = (a0 - a1) << 3; + tmp[3 + i * 4] = (a3 * 2217 - a2 * 5352 + 937) >> 9; } for (i = 0; i < 4; ++i) { - const int a0 = (tmp[0 + i] + tmp[12 + i]); + const int a0 = (tmp[0 + i] + tmp[12 + i]); // 15b const int a1 = (tmp[4 + i] + tmp[ 8 + i]); const int a2 = (tmp[4 + i] - tmp[ 8 + i]); const int a3 = (tmp[0 + i] - tmp[12 + i]); - out[0 + i] = (a0 + a1 + 7) >> 4; + out[0 + i] = (a0 + a1 + 7) >> 4; // 12b out[4 + i] = ((a2 * 2217 + a3 * 5352 + 12000) >> 16) + (a3 != 0); out[8 + i] = (a0 - a1 + 7) >> 4; out[12+ i] = ((a3 * 2217 - a2 * 5352 + 51000) >> 16); @@ -589,30 +569,30 @@ static int TTransform(const uint8_t* in, const uint16_t* w) { int i; // horizontal pass for (i = 0; i < 4; ++i, in += BPS) { - const int a0 = (in[0] + in[2]) << 2; - const int a1 = (in[1] + in[3]) << 2; - const int a2 = (in[1] - in[3]) << 2; - const int a3 = (in[0] - in[2]) << 2; - tmp[0 + i * 4] = a0 + a1 + (a0 != 0); + const int a0 = in[0] + in[2]; + const int a1 = in[1] + in[3]; + const int a2 = in[1] - in[3]; + const int a3 = in[0] - in[2]; + tmp[0 + i * 4] = a0 + a1; tmp[1 + i * 4] = a3 + a2; tmp[2 + i * 4] = a3 - a2; tmp[3 + i * 4] = a0 - a1; } // vertical pass for (i = 0; i < 4; ++i, ++w) { - const int a0 = (tmp[0 + i] + tmp[8 + i]); - const int a1 = (tmp[4 + i] + tmp[12+ i]); - const int a2 = (tmp[4 + i] - tmp[12+ i]); - const int a3 = (tmp[0 + i] - tmp[8 + i]); + const int a0 = tmp[0 + i] + tmp[8 + i]; + const int a1 = tmp[4 + i] + tmp[12+ i]; + const int a2 = tmp[4 + i] - tmp[12+ i]; + const int a3 = tmp[0 + i] - tmp[8 + i]; const int b0 = a0 + a1; const int b1 = a3 + a2; const int b2 = a3 - a2; const int b3 = a0 - a1; - // abs((b + (b<0) + 3) >> 3) = (abs(b) + 3) >> 3 - sum += w[ 0] * ((abs(b0) + 3) >> 3); - sum += w[ 4] * ((abs(b1) + 3) >> 3); - sum += w[ 8] * ((abs(b2) + 3) >> 3); - sum += w[12] * ((abs(b3) + 3) >> 3); + + sum += w[ 0] * abs(b0); + sum += w[ 4] * abs(b1); + sum += w[ 8] * abs(b2); + sum += w[12] * abs(b3); } return sum; } @@ -621,7 +601,7 @@ static int Disto4x4(const uint8_t* const a, const uint8_t* const b, const uint16_t* const w) { const int sum1 = TTransform(a, w); const int sum2 = TTransform(b, w); - return (abs(sum2 - sum1) + 8) >> 4; + return abs(sum2 - sum1) >> 5; } static int Disto16x16(const uint8_t* const a, const uint8_t* const b, @@ -706,6 +686,7 @@ VP8QuantizeBlock VP8EncQuantizeBlock; VP8BlockCopy VP8Copy4x4; extern void VP8EncDspInitSSE2(void); +extern void VP8EncDspInitNEON(void); void VP8EncDspInit(void) { InitTables(); @@ -734,6 +715,10 @@ void VP8EncDspInit(void) { if (VP8GetCPUInfo(kSSE2)) { VP8EncDspInitSSE2(); } +#elif defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + VP8EncDspInitNEON(); + } #endif } } diff --git a/third_party/libwebp/dsp/enc_neon.c b/third_party/libwebp/dsp/enc_neon.c new file mode 100644 index 0000000..b5a1fba --- /dev/null +++ b/third_party/libwebp/dsp/enc_neon.c @@ -0,0 +1,661 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// ARM NEON version of speed-critical encoding functions. +// +// adapted from libvpx (http://www.webmproject.org/code/) + +#include "./dsp.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if defined(WEBP_USE_NEON) + +#include "../enc/vp8enci.h" + +//------------------------------------------------------------------------------ +// Transforms (Paragraph 14.4) + +// Inverse transform. +// This code is pretty much the same as TransformOneNEON in the decoder, except +// for subtraction to *ref. See the comments there for algorithmic explanations. +static void ITransformOne(const uint8_t* ref, + const int16_t* in, uint8_t* dst) { + const int kBPS = BPS; + const int16_t kC1C2[] = { 20091, 17734, 0, 0 }; // kC1 / (kC2 >> 1) / 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 + ); +} + +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); + } +} + +// Same code as dec_neon.c +static void ITransformWHT(const int16_t* in, int16_t* out) { + const int kStep = 32; // The store is only incrementing the pointer as if we + // had stored a single byte. + __asm__ volatile ( + // part 1 + // load data into q0, q1 + "vld1.16 {q0, q1}, [%[in]] \n" + + "vaddl.s16 q2, d0, d3 \n" // a0 = in[0] + in[12] + "vaddl.s16 q3, d1, d2 \n" // a1 = in[4] + in[8] + "vsubl.s16 q4, d1, d2 \n" // a2 = in[4] - in[8] + "vsubl.s16 q5, d0, d3 \n" // a3 = in[0] - in[12] + + "vadd.s32 q0, q2, q3 \n" // tmp[0] = a0 + a1 + "vsub.s32 q2, q2, q3 \n" // tmp[8] = a0 - a1 + "vadd.s32 q1, q5, q4 \n" // tmp[4] = a3 + a2 + "vsub.s32 q3, q5, q4 \n" // tmp[12] = a3 - a2 + + // Transpose + // q0 = tmp[0, 4, 8, 12], q1 = tmp[2, 6, 10, 14] + // q2 = tmp[1, 5, 9, 13], q3 = tmp[3, 7, 11, 15] + "vswp d1, d4 \n" // vtrn.64 q0, q2 + "vswp d3, d6 \n" // vtrn.64 q1, q3 + "vtrn.32 q0, q1 \n" + "vtrn.32 q2, q3 \n" + + "vmov.s32 q4, #3 \n" // dc = 3 + "vadd.s32 q0, q0, q4 \n" // dc = tmp[0] + 3 + "vadd.s32 q6, q0, q3 \n" // a0 = dc + tmp[3] + "vadd.s32 q7, q1, q2 \n" // a1 = tmp[1] + tmp[2] + "vsub.s32 q8, q1, q2 \n" // a2 = tmp[1] - tmp[2] + "vsub.s32 q9, q0, q3 \n" // a3 = dc - tmp[3] + + "vadd.s32 q0, q6, q7 \n" + "vshrn.s32 d0, q0, #3 \n" // (a0 + a1) >> 3 + "vadd.s32 q1, q9, q8 \n" + "vshrn.s32 d1, q1, #3 \n" // (a3 + a2) >> 3 + "vsub.s32 q2, q6, q7 \n" + "vshrn.s32 d2, q2, #3 \n" // (a0 - a1) >> 3 + "vsub.s32 q3, q9, q8 \n" + "vshrn.s32 d3, q3, #3 \n" // (a3 - a2) >> 3 + + // set the results to output + "vst1.16 d0[0], [%[out]], %[kStep] \n" + "vst1.16 d1[0], [%[out]], %[kStep] \n" + "vst1.16 d2[0], [%[out]], %[kStep] \n" + "vst1.16 d3[0], [%[out]], %[kStep] \n" + "vst1.16 d0[1], [%[out]], %[kStep] \n" + "vst1.16 d1[1], [%[out]], %[kStep] \n" + "vst1.16 d2[1], [%[out]], %[kStep] \n" + "vst1.16 d3[1], [%[out]], %[kStep] \n" + "vst1.16 d0[2], [%[out]], %[kStep] \n" + "vst1.16 d1[2], [%[out]], %[kStep] \n" + "vst1.16 d2[2], [%[out]], %[kStep] \n" + "vst1.16 d3[2], [%[out]], %[kStep] \n" + "vst1.16 d0[3], [%[out]], %[kStep] \n" + "vst1.16 d1[3], [%[out]], %[kStep] \n" + "vst1.16 d2[3], [%[out]], %[kStep] \n" + "vst1.16 d3[3], [%[out]], %[kStep] \n" + + : [out] "+r"(out) // modified registers + : [in] "r"(in), [kStep] "r"(kStep) // constants + : "memory", "q0", "q1", "q2", "q3", "q4", + "q5", "q6", "q7", "q8", "q9" // clobbered + ); +} + +// Forward transform. + +// 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.s16 d4, d4 \n" + // 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 + ); +} + +static void FTransformWHT(const int16_t* in, int16_t* out) { + const int kStep = 32; + __asm__ volatile ( + // d0 = in[0 * 16] , d1 = in[1 * 16] + // d2 = in[2 * 16] , d3 = in[3 * 16] + "vld1.16 d0[0], [%[in]], %[kStep] \n" + "vld1.16 d1[0], [%[in]], %[kStep] \n" + "vld1.16 d2[0], [%[in]], %[kStep] \n" + "vld1.16 d3[0], [%[in]], %[kStep] \n" + "vld1.16 d0[1], [%[in]], %[kStep] \n" + "vld1.16 d1[1], [%[in]], %[kStep] \n" + "vld1.16 d2[1], [%[in]], %[kStep] \n" + "vld1.16 d3[1], [%[in]], %[kStep] \n" + "vld1.16 d0[2], [%[in]], %[kStep] \n" + "vld1.16 d1[2], [%[in]], %[kStep] \n" + "vld1.16 d2[2], [%[in]], %[kStep] \n" + "vld1.16 d3[2], [%[in]], %[kStep] \n" + "vld1.16 d0[3], [%[in]], %[kStep] \n" + "vld1.16 d1[3], [%[in]], %[kStep] \n" + "vld1.16 d2[3], [%[in]], %[kStep] \n" + "vld1.16 d3[3], [%[in]], %[kStep] \n" + + "vaddl.s16 q2, d0, d2 \n" + "vshl.s32 q2, q2, #2 \n" // a0=(in[0*16]+in[2*16])<<2 + "vaddl.s16 q3, d1, d3 \n" + "vshl.s32 q3, q3, #2 \n" // a1=(in[1*16]+in[3*16])<<2 + "vsubl.s16 q4, d1, d3 \n" + "vshl.s32 q4, q4, #2 \n" // a2=(in[1*16]-in[3*16])<<2 + "vsubl.s16 q5, d0, d2 \n" + "vshl.s32 q5, q5, #2 \n" // a3=(in[0*16]-in[2*16])<<2 + + "vceq.s32 q10, q2, #0 \n" + "vmvn.s32 q10, q10 \n" // (a0 != 0) + "vqadd.s32 q6, q2, q3 \n" // (a0 + a1) + "vqsub.s32 q6, q6, q10 \n" // (a0 + a1) + (a0 != 0) + "vqadd.s32 q7, q5, q4 \n" // a3 + a2 + "vqsub.s32 q8, q5, q4 \n" // a3 - a2 + "vqsub.s32 q9, q2, q3 \n" // a0 - a1 + + // Transpose + // q6 = tmp[0, 1, 2, 3] ; q7 = tmp[ 4, 5, 6, 7] + // q8 = tmp[8, 9, 10, 11] ; q9 = tmp[12, 13, 14, 15] + "vswp d13, d16 \n" // vtrn.64 q0, q2 + "vswp d15, d18 \n" // vtrn.64 q1, q3 + "vtrn.32 q6, q7 \n" + "vtrn.32 q8, q9 \n" + + "vqadd.s32 q0, q6, q8 \n" // a0 = tmp[0] + tmp[8] + "vqadd.s32 q1, q7, q9 \n" // a1 = tmp[4] + tmp[12] + "vqsub.s32 q2, q7, q9 \n" // a2 = tmp[4] - tmp[12] + "vqsub.s32 q3, q6, q8 \n" // a3 = tmp[0] - tmp[8] + + "vqadd.s32 q4, q0, q1 \n" // b0 = a0 + a1 + "vqadd.s32 q5, q3, q2 \n" // b1 = a3 + a2 + "vqsub.s32 q6, q3, q2 \n" // b2 = a3 - a2 + "vqsub.s32 q7, q0, q1 \n" // b3 = a0 - a1 + + "vmov.s32 q0, #3 \n" // q0 = 3 + + "vcgt.s32 q1, q4, #0 \n" // (b0>0) + "vqsub.s32 q2, q4, q1 \n" // (b0+(b0>0)) + "vqadd.s32 q3, q2, q0 \n" // (b0+(b0>0)+3) + "vshrn.s32 d18, q3, #3 \n" // (b0+(b0>0)+3) >> 3 + + "vcgt.s32 q1, q5, #0 \n" // (b1>0) + "vqsub.s32 q2, q5, q1 \n" // (b1+(b1>0)) + "vqadd.s32 q3, q2, q0 \n" // (b1+(b1>0)+3) + "vshrn.s32 d19, q3, #3 \n" // (b1+(b1>0)+3) >> 3 + + "vcgt.s32 q1, q6, #0 \n" // (b2>0) + "vqsub.s32 q2, q6, q1 \n" // (b2+(b2>0)) + "vqadd.s32 q3, q2, q0 \n" // (b2+(b2>0)+3) + "vshrn.s32 d20, q3, #3 \n" // (b2+(b2>0)+3) >> 3 + + "vcgt.s32 q1, q7, #0 \n" // (b3>0) + "vqsub.s32 q2, q7, q1 \n" // (b3+(b3>0)) + "vqadd.s32 q3, q2, q0 \n" // (b3+(b3>0)+3) + "vshrn.s32 d21, q3, #3 \n" // (b3+(b3>0)+3) >> 3 + + "vst1.16 {q9, q10}, [%[out]] \n" + + : [in] "+r"(in) + : [kStep] "r"(kStep), [out] "r"(out) + : "memory", "q0", "q1", "q2", "q3", "q4", "q5", + "q6", "q7", "q8", "q9", "q10" // clobbered + ) ; +} + +//------------------------------------------------------------------------------ +// 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. +// This uses a TTransform helper function in C +static int Disto4x4(const uint8_t* const a, const uint8_t* const b, + const uint16_t* const w) { + const int kBPS = BPS; + const uint8_t* A = a; + const uint8_t* B = b; + const uint16_t* W = w; + int sum; + __asm__ volatile ( + "vld1.32 d0[0], [%[a]], %[kBPS] \n" + "vld1.32 d0[1], [%[a]], %[kBPS] \n" + "vld1.32 d2[0], [%[a]], %[kBPS] \n" + "vld1.32 d2[1], [%[a]] \n" + + "vld1.32 d1[0], [%[b]], %[kBPS] \n" + "vld1.32 d1[1], [%[b]], %[kBPS] \n" + "vld1.32 d3[0], [%[b]], %[kBPS] \n" + "vld1.32 d3[1], [%[b]] \n" + + // a d0/d2, b d1/d3 + // d0/d1: 01 01 01 01 + // d2/d3: 23 23 23 23 + // But: it goes 01 45 23 67 + // Notice the middle values are transposed + "vtrn.16 q0, q1 \n" + + // {a0, a1} = {in[0] + in[2], in[1] + in[3]} + "vaddl.u8 q2, d0, d2 \n" + "vaddl.u8 q10, d1, d3 \n" + // {a3, a2} = {in[0] - in[2], in[1] - in[3]} + "vsubl.u8 q3, d0, d2 \n" + "vsubl.u8 q11, d1, d3 \n" + + // tmp[0] = a0 + a1 + "vpaddl.s16 q0, q2 \n" + "vpaddl.s16 q8, q10 \n" + + // tmp[1] = a3 + a2 + "vpaddl.s16 q1, q3 \n" + "vpaddl.s16 q9, q11 \n" + + // No pair subtract + // q2 = {a0, a3} + // q3 = {a1, a2} + "vtrn.16 q2, q3 \n" + "vtrn.16 q10, q11 \n" + + // {tmp[3], tmp[2]} = {a0 - a1, a3 - a2} + "vsubl.s16 q12, d4, d6 \n" + "vsubl.s16 q13, d5, d7 \n" + "vsubl.s16 q14, d20, d22 \n" + "vsubl.s16 q15, d21, d23 \n" + + // separate tmp[3] and tmp[2] + // q12 = tmp[3] + // q13 = tmp[2] + "vtrn.32 q12, q13 \n" + "vtrn.32 q14, q15 \n" + + // Transpose tmp for a + "vswp d1, d26 \n" // vtrn.64 + "vswp d3, d24 \n" // vtrn.64 + "vtrn.32 q0, q1 \n" + "vtrn.32 q13, q12 \n" + + // Transpose tmp for b + "vswp d17, d30 \n" // vtrn.64 + "vswp d19, d28 \n" // vtrn.64 + "vtrn.32 q8, q9 \n" + "vtrn.32 q15, q14 \n" + + // The first Q register is a, the second b. + // q0/8 tmp[0-3] + // q13/15 tmp[4-7] + // q1/9 tmp[8-11] + // q12/14 tmp[12-15] + + // These are still in 01 45 23 67 order. We fix it easily in the addition + // case but the subtraction propegates them. + "vswp d3, d27 \n" + "vswp d19, d31 \n" + + // a0 = tmp[0] + tmp[8] + "vadd.s32 q2, q0, q1 \n" + "vadd.s32 q3, q8, q9 \n" + + // a1 = tmp[4] + tmp[12] + "vadd.s32 q10, q13, q12 \n" + "vadd.s32 q11, q15, q14 \n" + + // a2 = tmp[4] - tmp[12] + "vsub.s32 q13, q13, q12 \n" + "vsub.s32 q15, q15, q14 \n" + + // a3 = tmp[0] - tmp[8] + "vsub.s32 q0, q0, q1 \n" + "vsub.s32 q8, q8, q9 \n" + + // b0 = a0 + a1 + "vadd.s32 q1, q2, q10 \n" + "vadd.s32 q9, q3, q11 \n" + + // b1 = a3 + a2 + "vadd.s32 q12, q0, q13 \n" + "vadd.s32 q14, q8, q15 \n" + + // b2 = a3 - a2 + "vsub.s32 q0, q0, q13 \n" + "vsub.s32 q8, q8, q15 \n" + + // b3 = a0 - a1 + "vsub.s32 q2, q2, q10 \n" + "vsub.s32 q3, q3, q11 \n" + + "vld1.64 {q10, q11}, [%[w]] \n" + + // abs(b0) + "vabs.s32 q1, q1 \n" + "vabs.s32 q9, q9 \n" + // abs(b1) + "vabs.s32 q12, q12 \n" + "vabs.s32 q14, q14 \n" + // abs(b2) + "vabs.s32 q0, q0 \n" + "vabs.s32 q8, q8 \n" + // abs(b3) + "vabs.s32 q2, q2 \n" + "vabs.s32 q3, q3 \n" + + // expand w before using. + "vmovl.u16 q13, d20 \n" + "vmovl.u16 q15, d21 \n" + + // w[0] * abs(b0) + "vmul.u32 q1, q1, q13 \n" + "vmul.u32 q9, q9, q13 \n" + + // w[4] * abs(b1) + "vmla.u32 q1, q12, q15 \n" + "vmla.u32 q9, q14, q15 \n" + + // expand w before using. + "vmovl.u16 q13, d22 \n" + "vmovl.u16 q15, d23 \n" + + // w[8] * abs(b1) + "vmla.u32 q1, q0, q13 \n" + "vmla.u32 q9, q8, q13 \n" + + // w[12] * abs(b1) + "vmla.u32 q1, q2, q15 \n" + "vmla.u32 q9, q3, q15 \n" + + // Sum the arrays + "vpaddl.u32 q1, q1 \n" + "vpaddl.u32 q9, q9 \n" + "vadd.u64 d2, d3 \n" + "vadd.u64 d18, d19 \n" + + // Hadamard transform needs 4 bits of extra precision (2 bits in each + // direction) for dynamic raw. Weights w[] are 16bits at max, so the maximum + // precision for coeff is 8bit of input + 4bits of Hadamard transform + + // 16bits for w[] + 2 bits of abs() summation. + // + // This uses a maximum of 31 bits (signed). Discarding the top 32 bits is + // A-OK. + + // sum2 - sum1 + "vsub.u32 d0, d2, d18 \n" + // abs(sum2 - sum1) + "vabs.s32 d0, d0 \n" + // abs(sum2 - sum1) >> 5 + "vshr.u32 d0, #5 \n" + + // It would be better to move the value straight into r0 but I'm not + // entirely sure how this works with inline assembly. + "vmov.32 %[sum], d0[0] \n" + + : [sum] "=r"(sum), [a] "+r"(A), [b] "+r"(B), [w] "+r"(W) + : [kBPS] "r"(kBPS) + : "memory", "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8", "q9", + "q10", "q11", "q12", "q13", "q14", "q15" // clobbered + ) ; + + return sum; +} + +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; +} + +#endif // WEBP_USE_NEON + +//------------------------------------------------------------------------------ +// Entry point + +extern void VP8EncDspInitNEON(void); + +void VP8EncDspInitNEON(void) { +#if defined(WEBP_USE_NEON) + VP8ITransform = ITransform; + VP8FTransform = FTransform; + + VP8ITransformWHT = ITransformWHT; + VP8FTransformWHT = FTransformWHT; + + VP8TDisto4x4 = Disto4x4; + VP8TDisto16x16 = Disto16x16; +#endif // WEBP_USE_NEON +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/third_party/libwebp/dsp/enc_sse2.c b/third_party/libwebp/dsp/enc_sse2.c index b046761..c4148b5 100644 --- a/third_party/libwebp/dsp/enc_sse2.c +++ b/third_party/libwebp/dsp/enc_sse2.c @@ -11,27 +11,58 @@ #include "./dsp.h" +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + #if defined(WEBP_USE_SSE2) #include <stdlib.h> // for abs() #include <emmintrin.h> #include "../enc/vp8enci.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { +//------------------------------------------------------------------------------ +// Quite useful macro for debugging. Left here for convenience. + +#if 0 +#include <stdio.h> +static void PrintReg(const __m128i r, const char* const name, int size) { + int n; + union { + __m128i r; + uint8_t i8[16]; + uint16_t i16[8]; + uint32_t i32[4]; + uint64_t i64[2]; + } tmp; + tmp.r = r; + printf("%s\t: ", name); + if (size == 8) { + for (n = 0; n < 16; ++n) printf("%.2x ", tmp.i8[n]); + } else if (size == 16) { + for (n = 0; n < 8; ++n) printf("%.4x ", tmp.i16[n]); + } else if (size == 32) { + for (n = 0; n < 4; ++n) printf("%.8x ", tmp.i32[n]); + } else { + for (n = 0; n < 2; ++n) printf("%.16lx ", tmp.i64[n]); + } + printf("\n"); +} #endif //------------------------------------------------------------------------------ // Compute susceptibility based on DCT-coeff histograms: // the higher, the "easier" the macroblock is to compress. -static int CollectHistogramSSE2(const uint8_t* ref, const uint8_t* pred, - int start_block, int end_block) { - int histo[MAX_COEFF_THRESH + 1] = { 0 }; - int16_t out[16]; - int j, k; +static void CollectHistogramSSE2(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; 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[]). @@ -47,9 +78,9 @@ static int CollectHistogramSSE2(const uint8_t* ref, const uint8_t* pred, const __m128i xor1 = _mm_xor_si128(out1, sign1); const __m128i abs0 = _mm_sub_epi16(xor0, sign0); const __m128i abs1 = _mm_sub_epi16(xor1, sign1); - // v = abs(out) >> 2 - const __m128i v0 = _mm_srai_epi16(abs0, 2); - const __m128i v1 = _mm_srai_epi16(abs1, 2); + // 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); @@ -58,13 +89,11 @@ static int CollectHistogramSSE2(const uint8_t* ref, const uint8_t* pred, _mm_storeu_si128((__m128i*)&out[8], bin1); } - // Use bin to update histogram. + // Convert coefficients to bin. for (k = 0; k < 16; ++k) { - histo[out[k]]++; + histo->distribution[out[k]]++; } } - - return VP8GetAlpha(histo); } //------------------------------------------------------------------------------ @@ -243,7 +272,7 @@ static void ITransformSSE2(const uint8_t* ref, const int16_t* in, uint8_t* dst, // Add inverse transform to 'ref' and store. { - const __m128i zero = _mm_set1_epi16(0); + const __m128i zero = _mm_setzero_si128(); // Load the reference(s). __m128i ref0, ref1, ref2, ref3; if (do_two) { @@ -295,17 +324,23 @@ static void FTransformSSE2(const uint8_t* src, const uint8_t* ref, int16_t* out) { const __m128i zero = _mm_setzero_si128(); const __m128i seven = _mm_set1_epi16(7); - const __m128i k7500 = _mm_set1_epi32(7500); - const __m128i k14500 = _mm_set1_epi32(14500); + const __m128i k937 = _mm_set1_epi32(937); + const __m128i k1812 = _mm_set1_epi32(1812); const __m128i k51000 = _mm_set1_epi32(51000); const __m128i k12000_plus_one = _mm_set1_epi32(12000 + (1 << 16)); const __m128i k5352_2217 = _mm_set_epi16(5352, 2217, 5352, 2217, 5352, 2217, 5352, 2217); const __m128i k2217_5352 = _mm_set_epi16(2217, -5352, 2217, -5352, 2217, -5352, 2217, -5352); - + const __m128i 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); __m128i v01, v32; + // Difference between src and ref and initial transpose. { // Load src and convert to 16b. @@ -326,73 +361,52 @@ static void FTransformSSE2(const uint8_t* src, const uint8_t* ref, 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. + // Compute difference. -> 00 01 02 03 00 00 00 00 const __m128i diff0 = _mm_sub_epi16(src_0, ref_0); const __m128i diff1 = _mm_sub_epi16(src_1, ref_1); const __m128i diff2 = _mm_sub_epi16(src_2, ref_2); const __m128i diff3 = _mm_sub_epi16(src_3, ref_3); - // Transpose. + + // 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 transpose0_0 = _mm_unpacklo_epi16(diff0, diff1); - const __m128i transpose0_1 = _mm_unpacklo_epi16(diff2, diff3); - // 00 10 01 11 02 12 03 13 - // 20 30 21 31 22 32 23 33 - const __m128i v23 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); - v01 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); - v32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); - // a02 a12 a22 a32 a03 a13 a23 a33 - // a00 a10 a20 a30 a01 a11 a21 a31 - // a03 a13 a23 a33 a02 a12 a22 a32 - } - - // First pass and subsequent transpose. - { - // Same operations are done on the (0,3) and (1,2) pairs. - // b0 = (a0 + a3) << 3 - // b1 = (a1 + a2) << 3 - // b3 = (a0 - a3) << 3 - // b2 = (a1 - a2) << 3 - const __m128i a01 = _mm_add_epi16(v01, v32); - const __m128i a32 = _mm_sub_epi16(v01, v32); - const __m128i b01 = _mm_slli_epi16(a01, 3); - const __m128i b32 = _mm_slli_epi16(a32, 3); - const __m128i b11 = _mm_unpackhi_epi64(b01, b01); - const __m128i b22 = _mm_unpackhi_epi64(b32, b32); - - // e0 = b0 + b1 - // e2 = b0 - b1 - const __m128i e0 = _mm_add_epi16(b01, b11); - const __m128i e2 = _mm_sub_epi16(b01, b11); - const __m128i e02 = _mm_unpacklo_epi64(e0, e2); - - // e1 = (b3 * 5352 + b2 * 2217 + 14500) >> 12 - // e3 = (b3 * 2217 - b2 * 5352 + 7500) >> 12 - const __m128i b23 = _mm_unpacklo_epi16(b22, b32); - const __m128i c1 = _mm_madd_epi16(b23, k5352_2217); - const __m128i c3 = _mm_madd_epi16(b23, k2217_5352); - const __m128i d1 = _mm_add_epi32(c1, k14500); - const __m128i d3 = _mm_add_epi32(c3, k7500); - const __m128i e1 = _mm_srai_epi32(d1, 12); - const __m128i e3 = _mm_srai_epi32(d3, 12); - const __m128i e13 = _mm_packs_epi32(e1, e3); - - // Transpose. - // 00 01 02 03 20 21 22 23 - // 10 11 12 13 30 31 32 33 - const __m128i transpose0_0 = _mm_unpacklo_epi16(e02, e13); - const __m128i transpose0_1 = _mm_unpackhi_epi16(e02, e13); - // 00 10 01 11 02 12 03 13 - // 20 30 21 31 22 32 23 33 - const __m128i v23 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); - v01 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); - v32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); - // 02 12 22 32 03 13 23 33 - // 00 10 20 30 01 11 21 31 - // 03 13 23 33 02 12 22 32 + const __m128i shuf01 = _mm_unpacklo_epi32(diff0, diff1); + const __m128i shuf23 = _mm_unpacklo_epi32(diff2, diff3); + // 00 01 10 11 02 03 12 13 + // 20 21 30 31 22 23 32 33 + const __m128i shuf01_p = + _mm_shufflehi_epi16(shuf01, _MM_SHUFFLE(2, 3, 0, 1)); + const __m128i shuf23_p = + _mm_shufflehi_epi16(shuf23, _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); + v01 = _mm_unpacklo_epi32(s_lo, s_hi); + v32 = _mm_shuffle_epi32(v23, _MM_SHUFFLE(1, 0, 3, 2)); // 3 2 3 2 3 2.. } // Second pass @@ -406,13 +420,12 @@ static void FTransformSSE2(const uint8_t* src, const uint8_t* ref, 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 b0 = _mm_add_epi16(a01, a11); - const __m128i b2 = _mm_sub_epi16(a01, a11); - const __m128i c0 = _mm_add_epi16(b0, seven); - const __m128i c2 = _mm_add_epi16(b2, seven); + const __m128i 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); @@ -430,6 +443,7 @@ static void FTransformSSE2(const uint8_t* src, const uint8_t* ref, // 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)); _mm_storel_epi64((__m128i*)&out[ 0], d0); @@ -442,10 +456,101 @@ static void FTransformSSE2(const uint8_t* src, const uint8_t* ref, //------------------------------------------------------------------------------ // Metric +static int SSE_Nx4SSE2(const uint8_t* a, const uint8_t* b, + int num_quads, int do_16) { + const __m128i zero = _mm_setzero_si128(); + __m128i sum1 = zero; + __m128i sum2 = zero; + + while (num_quads-- > 0) { + // Note: for the !do_16 case, we read 16 pixels instead of 8 but that's ok, + // thanks to buffer over-allocation to that effect. + const __m128i a0 = _mm_loadu_si128((__m128i*)&a[BPS * 0]); + const __m128i a1 = _mm_loadu_si128((__m128i*)&a[BPS * 1]); + const __m128i a2 = _mm_loadu_si128((__m128i*)&a[BPS * 2]); + const __m128i a3 = _mm_loadu_si128((__m128i*)&a[BPS * 3]); + const __m128i b0 = _mm_loadu_si128((__m128i*)&b[BPS * 0]); + const __m128i b1 = _mm_loadu_si128((__m128i*)&b[BPS * 1]); + const __m128i b2 = _mm_loadu_si128((__m128i*)&b[BPS * 2]); + const __m128i b3 = _mm_loadu_si128((__m128i*)&b[BPS * 3]); + + // compute clip0(a-b) and clip0(b-a) + const __m128i a0p = _mm_subs_epu8(a0, b0); + const __m128i a0m = _mm_subs_epu8(b0, a0); + const __m128i a1p = _mm_subs_epu8(a1, b1); + const __m128i a1m = _mm_subs_epu8(b1, a1); + const __m128i a2p = _mm_subs_epu8(a2, b2); + const __m128i a2m = _mm_subs_epu8(b2, a2); + const __m128i a3p = _mm_subs_epu8(a3, b3); + const __m128i a3m = _mm_subs_epu8(b3, a3); + + // compute |a-b| with 8b arithmetic as clip0(a-b) | clip0(b-a) + const __m128i diff0 = _mm_or_si128(a0p, a0m); + const __m128i diff1 = _mm_or_si128(a1p, a1m); + const __m128i diff2 = _mm_or_si128(a2p, a2m); + const __m128i diff3 = _mm_or_si128(a3p, a3m); + + // unpack (only four operations, instead of eight) + const __m128i low0 = _mm_unpacklo_epi8(diff0, zero); + const __m128i low1 = _mm_unpacklo_epi8(diff1, zero); + const __m128i low2 = _mm_unpacklo_epi8(diff2, zero); + const __m128i low3 = _mm_unpacklo_epi8(diff3, zero); + + // multiply with self + const __m128i low_madd0 = _mm_madd_epi16(low0, low0); + const __m128i low_madd1 = _mm_madd_epi16(low1, low1); + const __m128i low_madd2 = _mm_madd_epi16(low2, low2); + const __m128i low_madd3 = _mm_madd_epi16(low3, low3); + + // collect in a cascading way + const __m128i low_sum0 = _mm_add_epi32(low_madd0, low_madd1); + const __m128i low_sum1 = _mm_add_epi32(low_madd2, low_madd3); + sum1 = _mm_add_epi32(sum1, low_sum0); + sum2 = _mm_add_epi32(sum2, low_sum1); + + if (do_16) { // if necessary, process the higher 8 bytes similarly + const __m128i hi0 = _mm_unpackhi_epi8(diff0, zero); + const __m128i hi1 = _mm_unpackhi_epi8(diff1, zero); + const __m128i hi2 = _mm_unpackhi_epi8(diff2, zero); + const __m128i hi3 = _mm_unpackhi_epi8(diff3, zero); + + const __m128i hi_madd0 = _mm_madd_epi16(hi0, hi0); + const __m128i hi_madd1 = _mm_madd_epi16(hi1, hi1); + const __m128i hi_madd2 = _mm_madd_epi16(hi2, hi2); + const __m128i hi_madd3 = _mm_madd_epi16(hi3, hi3); + const __m128i hi_sum0 = _mm_add_epi32(hi_madd0, hi_madd1); + const __m128i hi_sum1 = _mm_add_epi32(hi_madd2, hi_madd3); + sum1 = _mm_add_epi32(sum1, hi_sum0); + sum2 = _mm_add_epi32(sum2, hi_sum1); + } + a += 4 * BPS; + b += 4 * BPS; + } + { + int32_t tmp[4]; + const __m128i sum = _mm_add_epi32(sum1, sum2); + _mm_storeu_si128((__m128i*)tmp, sum); + return (tmp[3] + tmp[2] + tmp[1] + tmp[0]); + } +} + +static int SSE16x16SSE2(const uint8_t* a, const uint8_t* b) { + return SSE_Nx4SSE2(a, b, 4, 1); +} + +static int SSE16x8SSE2(const uint8_t* a, const uint8_t* b) { + return SSE_Nx4SSE2(a, b, 2, 1); +} + +static int SSE8x8SSE2(const uint8_t* a, const uint8_t* b) { + return SSE_Nx4SSE2(a, b, 2, 0); +} + static int SSE4x4SSE2(const uint8_t* a, const uint8_t* b) { - const __m128i zero = _mm_set1_epi16(0); + const __m128i zero = _mm_setzero_si128(); - // Load values. + // 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((__m128i*)&a[BPS * 0]); const __m128i a1 = _mm_loadl_epi64((__m128i*)&a[BPS * 1]); const __m128i a2 = _mm_loadl_epi64((__m128i*)&a[BPS * 2]); @@ -483,6 +588,7 @@ static int SSE4x4SSE2(const uint8_t* a, const uint8_t* b) { const __m128i sum0 = _mm_add_epi32(madd0, madd1); const __m128i sum1 = _mm_add_epi32(madd2, madd3); const __m128i sum2 = _mm_add_epi32(sum0, sum1); + int32_t tmp[4]; _mm_storeu_si128((__m128i*)tmp, sum2); return (tmp[3] + tmp[2] + tmp[1] + tmp[0]); @@ -502,8 +608,6 @@ static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, int32_t sum[4]; __m128i tmp_0, tmp_1, tmp_2, tmp_3; const __m128i zero = _mm_setzero_si128(); - const __m128i one = _mm_set1_epi16(1); - const __m128i three = _mm_set1_epi16(3); // Load, combine and tranpose inputs. { @@ -550,17 +654,14 @@ static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, // Horizontal pass and subsequent transpose. { // Calculate a and b (two 4x4 at once). - const __m128i a0 = _mm_slli_epi16(_mm_add_epi16(tmp_0, tmp_2), 2); - const __m128i a1 = _mm_slli_epi16(_mm_add_epi16(tmp_1, tmp_3), 2); - const __m128i a2 = _mm_slli_epi16(_mm_sub_epi16(tmp_1, tmp_3), 2); - const __m128i a3 = _mm_slli_epi16(_mm_sub_epi16(tmp_0, tmp_2), 2); - // b0_extra = (a0 != 0); - const __m128i b0_extra = _mm_andnot_si128(_mm_cmpeq_epi16 (a0, zero), one); - const __m128i b0_base = _mm_add_epi16(a0, a1); + const __m128i a0 = _mm_add_epi16(tmp_0, tmp_2); + const __m128i a1 = _mm_add_epi16(tmp_1, tmp_3); + const __m128i a2 = _mm_sub_epi16(tmp_1, tmp_3); + const __m128i a3 = _mm_sub_epi16(tmp_0, tmp_2); + const __m128i b0 = _mm_add_epi16(a0, a1); const __m128i b1 = _mm_add_epi16(a3, a2); const __m128i b2 = _mm_sub_epi16(a3, a2); const __m128i b3 = _mm_sub_epi16(a0, a1); - const __m128i b0 = _mm_add_epi16(b0_base, b0_extra); // a00 a01 a02 a03 b00 b01 b02 b03 // a10 a11 a12 a13 b10 b11 b12 b13 // a20 a21 a22 a23 b20 b21 b22 b23 @@ -635,19 +736,6 @@ static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, B_b2 = _mm_sub_epi16(B_b2, sign_B_b2); } - // b = abs(b) + 3 - A_b0 = _mm_add_epi16(A_b0, three); - A_b2 = _mm_add_epi16(A_b2, three); - B_b0 = _mm_add_epi16(B_b0, three); - B_b2 = _mm_add_epi16(B_b2, three); - - // abs((b + (b<0) + 3) >> 3) = (abs(b) + 3) >> 3 - // b = (abs(b) + 3) >> 3 - A_b0 = _mm_srai_epi16(A_b0, 3); - A_b2 = _mm_srai_epi16(A_b2, 3); - B_b0 = _mm_srai_epi16(B_b0, 3); - B_b2 = _mm_srai_epi16(B_b2, 3); - // weighted sums A_b0 = _mm_madd_epi16(A_b0, w_0); A_b2 = _mm_madd_epi16(A_b2, w_8); @@ -666,7 +754,7 @@ static int TTransformSSE2(const uint8_t* inA, const uint8_t* inB, static int Disto4x4SSE2(const uint8_t* const a, const uint8_t* const b, const uint16_t* const w) { const int diff_sum = TTransformSSE2(a, b, w); - return (abs(diff_sum) + 8) >> 4; + return abs(diff_sum) >> 5; } static int Disto16x16SSE2(const uint8_t* const a, const uint8_t* const b, @@ -681,7 +769,6 @@ static int Disto16x16SSE2(const uint8_t* const a, const uint8_t* const b, return D; } - //------------------------------------------------------------------------------ // Quantization // @@ -690,8 +777,7 @@ static int Disto16x16SSE2(const uint8_t* const a, const uint8_t* const b, static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], int n, const VP8Matrix* const mtx) { const __m128i max_coeff_2047 = _mm_set1_epi16(2047); - const __m128i zero = _mm_set1_epi16(0); - __m128i sign0, sign8; + const __m128i zero = _mm_setzero_si128(); __m128i coeff0, coeff8; __m128i out0, out8; __m128i packed_out; @@ -713,8 +799,8 @@ static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], const __m128i zthresh8 = _mm_loadu_si128((__m128i*)&mtx->zthresh_[8]); // sign(in) = in >> 15 (0x0000 if positive, 0xffff if negative) - sign0 = _mm_srai_epi16(in0, 15); - sign8 = _mm_srai_epi16(in8, 15); + const __m128i sign0 = _mm_srai_epi16(in0, 15); + const __m128i sign8 = _mm_srai_epi16(in8, 15); // coeff = abs(in) = (in ^ sign) - sign coeff0 = _mm_xor_si128(in0, sign0); @@ -819,19 +905,28 @@ static int QuantizeBlockSSE2(int16_t in[16], int16_t out[16], } } +#endif // WEBP_USE_SSE2 + +//------------------------------------------------------------------------------ +// Entry point + extern void VP8EncDspInitSSE2(void); + void VP8EncDspInitSSE2(void) { +#if defined(WEBP_USE_SSE2) VP8CollectHistogram = CollectHistogramSSE2; VP8EncQuantizeBlock = QuantizeBlockSSE2; VP8ITransform = ITransformSSE2; VP8FTransform = FTransformSSE2; + VP8SSE16x16 = SSE16x16SSE2; + VP8SSE16x8 = SSE16x8SSE2; + VP8SSE8x8 = SSE8x8SSE2; VP8SSE4x4 = SSE4x4SSE2; VP8TDisto4x4 = Disto4x4SSE2; VP8TDisto16x16 = Disto16x16SSE2; +#endif // WEBP_USE_SSE2 } #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif - -#endif // WEBP_USE_SSE2 diff --git a/third_party/libwebp/dsp/lossless.c b/third_party/libwebp/dsp/lossless.c index 472e641..080b3e6 100644 --- a/third_party/libwebp/dsp/lossless.c +++ b/third_party/libwebp/dsp/lossless.c @@ -11,25 +11,31 @@ // Jyrki Alakuijala (jyrki@google.com) // Urvang Joshi (urvang@google.com) +#include "./dsp.h" + +// Define the following if target arch is sure to have SSE2 +// #define WEBP_TARGET_HAS_SSE2 + #if defined(__cplusplus) || defined(c_plusplus) extern "C" { #endif +#if defined(WEBP_TARGET_HAS_SSE2) +#include <emmintrin.h> +#endif + #include <math.h> #include <stdlib.h> #include "./lossless.h" #include "../dec/vp8li.h" -#include "../dsp/yuv.h" -#include "../dsp/dsp.h" -#include "../enc/histogram.h" +#include "./yuv.h" #define MAX_DIFF_COST (1e30f) // lookup table for small values of log2(int) #define APPROX_LOG_MAX 4096 #define LOG_2_RECIPROCAL 1.44269504088896338700465094007086 -#define LOG_LOOKUP_IDX_MAX 256 -static const float kLog2Table[LOG_LOOKUP_IDX_MAX] = { +const float kLog2Table[LOG_LOOKUP_IDX_MAX] = { 0.0000000000000000f, 0.0000000000000000f, 1.0000000000000000f, 1.5849625007211560f, 2.0000000000000000f, 2.3219280948873621f, @@ -160,16 +166,97 @@ static const float kLog2Table[LOG_LOOKUP_IDX_MAX] = { 7.9886846867721654f, 7.9943534368588577f }; -float VP8LFastLog2(int v) { - if (v < LOG_LOOKUP_IDX_MAX) { - return kLog2Table[v]; - } else if (v < APPROX_LOG_MAX) { +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 +}; + +float VP8LFastSLog2Slow(int v) { + assert(v >= LOG_LOOKUP_IDX_MAX); + if (v < APPROX_LOG_MAX) { int log_cnt = 0; + const float v_f = (float)v; while (v >= LOG_LOOKUP_IDX_MAX) { ++log_cnt; v = v >> 1; } - return kLog2Table[v] + (float)log_cnt; + return v_f * (kLog2Table[v] + log_cnt); + } else { + return (float)(LOG_2_RECIPROCAL * v * log((double)v)); + } +} + +float VP8LFastLog2Slow(int v) { + assert(v >= LOG_LOOKUP_IDX_MAX); + if (v < APPROX_LOG_MAX) { + int log_cnt = 0; + while (v >= LOG_LOOKUP_IDX_MAX) { + ++log_cnt; + v = v >> 1; + } + return kLog2Table[v] + log_cnt; } else { return (float)(LOG_2_RECIPROCAL * log((double)v)); } @@ -198,6 +285,61 @@ static WEBP_INLINE uint32_t Average4(uint32_t a0, uint32_t a1, return Average2(Average2(a0, a1), Average2(a2, a3)); } +#if defined(WEBP_TARGET_HAS_SSE2) +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 uint32_t ave = Average2(c0, c1); + const __m128i zero = _mm_setzero_si128(); + const __m128i A0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(ave), zero); + const __m128i B0 = _mm_unpacklo_epi8(_mm_cvtsi32_si128(c2), zero); + 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; +} + +#else + static WEBP_INLINE uint32_t Clip255(uint32_t a) { if (a < 256) { return a; @@ -239,9 +381,9 @@ static WEBP_INLINE uint32_t ClampedAddSubtractHalf(uint32_t c0, uint32_t c1, } static WEBP_INLINE int Sub3(int a, int b, int c) { - const int pa = b - c; - const int pb = a - c; - return abs(pa) - abs(pb); + const int pb = b - c; + const int pa = a - c; + return abs(pb) - abs(pa); } static WEBP_INLINE uint32_t Select(uint32_t a, uint32_t b, uint32_t c) { @@ -250,9 +392,9 @@ static WEBP_INLINE uint32_t Select(uint32_t a, uint32_t b, uint32_t c) { 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; } +#endif //------------------------------------------------------------------------------ // Predictors @@ -340,35 +482,36 @@ static float PredictionCostSpatial(const int* counts, return (float)(-0.1 * bits); } -// Compute the Shanon's entropy: Sum(p*log2(p)) -static float ShannonEntropy(const int* const array, int n) { +// Compute the combined Shanon's entropy for distribution {X} and {X+Y} +static float CombinedShannonEntropy(const int* const X, + const int* const Y, int n) { int i; - float retval = 0.f; - int sum = 0; + double retval = 0.; + int sumX = 0, sumXY = 0; for (i = 0; i < n; ++i) { - if (array[i] != 0) { - sum += array[i]; - retval -= VP8LFastSLog2(array[i]); + const int x = X[i]; + const int xy = X[i] + Y[i]; + if (x != 0) { + sumX += x; + retval -= VP8LFastSLog2(x); + } + if (xy != 0) { + sumXY += xy; + retval -= VP8LFastSLog2(xy); } } - retval += VP8LFastSLog2(sum); - return retval; + retval += VP8LFastSLog2(sumX) + VP8LFastSLog2(sumXY); + return (float)retval; } static float PredictionCostSpatialHistogram(int accumulated[4][256], int tile[4][256]) { int i; - int k; - int combo[256]; double retval = 0; for (i = 0; i < 4; ++i) { - const double exp_val = 0.94; - retval += PredictionCostSpatial(&tile[i][0], 1, exp_val); - retval += ShannonEntropy(&tile[i][0], 256); - for (k = 0; k < 256; ++k) { - combo[k] = accumulated[i][k] + tile[i][k]; - } - retval += ShannonEntropy(&combo[0], 256); + const double kExpValue = 0.94; + retval += PredictionCostSpatial(tile[i], 1, kExpValue); + retval += CombinedShannonEntropy(tile[i], accumulated[i], 256); } return (float)retval; } @@ -572,8 +715,21 @@ static void PredictorInverseTransform(const VP8LTransform* const transform, } void VP8LSubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixs) { - int i; - for (i = 0; i < num_pixs; ++i) { + int i = 0; +#if defined(WEBP_TARGET_HAS_SSE2) + const __m128i mask = _mm_set1_epi32(0x0000ff00); + for (; i + 4 < num_pixs; i += 4) { + const __m128i in = _mm_loadu_si128((__m128i*)&argb_data[i]); + const __m128i in_00g0 = _mm_and_si128(in, mask); // 00g0|00g0|... + const __m128i in_0g00 = _mm_slli_epi32(in_00g0, 8); // 0g00|0g00|... + const __m128i in_000g = _mm_srli_epi32(in_00g0, 8); // 000g|000g|... + const __m128i in_0g0g = _mm_or_si128(in_0g00, in_000g); + const __m128i out = _mm_sub_epi8(in, in_0g0g); + _mm_storeu_si128((__m128i*)&argb_data[i], out); + } + // fallthrough and finish off with plain-C +#endif + for (; i < num_pixs; ++i) { const uint32_t argb = argb_data[i]; const uint32_t green = (argb >> 8) & 0xff; const uint32_t new_r = (((argb >> 16) & 0xff) - green) & 0xff; @@ -588,9 +744,21 @@ static void AddGreenToBlueAndRed(const VP8LTransform* const transform, int y_start, int y_end, uint32_t* data) { const int width = transform->xsize_; const uint32_t* const data_end = data + (y_end - y_start) * width; +#if defined(WEBP_TARGET_HAS_SSE2) + const __m128i mask = _mm_set1_epi32(0x0000ff00); + for (; data + 4 < data_end; data += 4) { + const __m128i in = _mm_loadu_si128((__m128i*)data); + const __m128i in_00g0 = _mm_and_si128(in, mask); // 00g0|00g0|... + const __m128i in_0g00 = _mm_slli_epi32(in_00g0, 8); // 0g00|0g00|... + const __m128i in_000g = _mm_srli_epi32(in_00g0, 8); // 000g|000g|... + const __m128i in_0g0g = _mm_or_si128(in_0g00, in_000g); + const __m128i out = _mm_add_epi8(in, in_0g0g); + _mm_storeu_si128((__m128i*)data, out); + } + // fallthrough and finish off with plain-C +#endif while (data < data_end) { const uint32_t argb = *data; - // "* 0001001u" is equivalent to "(green << 16) + green)" const uint32_t green = ((argb >> 8) & 0xff); uint32_t red_blue = (argb & 0x00ff00ffu); red_blue += (green << 16) | green; @@ -655,6 +823,25 @@ static WEBP_INLINE uint32_t TransformColor(const Multipliers* const m, return (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 WEBP_INLINE int SkipRepeatedPixels(const uint32_t* const argb, int ix, int xsize) { const uint32_t v = argb[ix]; @@ -675,14 +862,10 @@ static WEBP_INLINE int SkipRepeatedPixels(const uint32_t* const argb, static float PredictionCostCrossColor(const int accumulated[256], const int counts[256]) { // Favor low entropy, locally and globally. - int i; - int combo[256]; - for (i = 0; i < 256; ++i) { - combo[i] = accumulated[i] + counts[i]; - } - return ShannonEntropy(combo, 256) + - ShannonEntropy(counts, 256) + - PredictionCostSpatial(counts, 3, 2.4); // Favor small absolute values. + // Favor small absolute values for PredictionCostSpatial + static const double kExpValue = 2.4; + return CombinedShannonEntropy(counts, accumulated, 256) + + PredictionCostSpatial(counts, 3, kExpValue); } static Multipliers GetBestColorTransformForTile( @@ -712,85 +895,75 @@ static Multipliers GetBestColorTransformForTile( if (all_y_max > ysize) { all_y_max = ysize; } + for (green_to_red = -64; green_to_red <= 64; green_to_red += halfstep) { int histo[256] = { 0 }; int all_y; - Multipliers tx; - MultipliersClear(&tx); - tx.green_to_red_ = green_to_red & 0xff; for (all_y = tile_y_offset; all_y < all_y_max; ++all_y) { - uint32_t predict; int ix = all_y * xsize + tile_x_offset; int all_x; for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { if (SkipRepeatedPixels(argb, ix, xsize)) { continue; } - predict = TransformColor(&tx, argb[ix], 0); - ++histo[(predict >> 16) & 0xff]; // red. + ++histo[TransformColorRed(green_to_red, argb[ix])]; // red. } } cur_diff = PredictionCostCrossColor(&accumulated_red_histo[0], &histo[0]); - if (tx.green_to_red_ == prevX.green_to_red_) { + if ((uint8_t)green_to_red == prevX.green_to_red_) { cur_diff -= 3; // favor keeping the areas locally similar } - if (tx.green_to_red_ == prevY.green_to_red_) { + if ((uint8_t)green_to_red == prevY.green_to_red_) { cur_diff -= 3; // favor keeping the areas locally similar } - if (tx.green_to_red_ == 0) { + if (green_to_red == 0) { cur_diff -= 3; } if (cur_diff < best_diff) { best_diff = cur_diff; - best_tx = tx; + best_tx.green_to_red_ = green_to_red; } } best_diff = MAX_DIFF_COST; - green_to_red = best_tx.green_to_red_; for (green_to_blue = -32; green_to_blue <= 32; green_to_blue += step) { for (red_to_blue = -32; red_to_blue <= 32; red_to_blue += step) { int all_y; int histo[256] = { 0 }; - Multipliers tx; - tx.green_to_red_ = green_to_red; - tx.green_to_blue_ = green_to_blue; - tx.red_to_blue_ = red_to_blue; for (all_y = tile_y_offset; all_y < all_y_max; ++all_y) { - uint32_t predict; int all_x; int ix = all_y * xsize + tile_x_offset; for (all_x = tile_x_offset; all_x < all_x_max; ++all_x, ++ix) { if (SkipRepeatedPixels(argb, ix, xsize)) { continue; } - predict = TransformColor(&tx, argb[ix], 0); - ++histo[predict & 0xff]; // blue. + ++histo[TransformColorBlue(green_to_blue, red_to_blue, argb[ix])]; } } cur_diff = - PredictionCostCrossColor(&accumulated_blue_histo[0], &histo[0]); - if (tx.green_to_blue_ == prevX.green_to_blue_) { + PredictionCostCrossColor(&accumulated_blue_histo[0], &histo[0]); + if ((uint8_t)green_to_blue == prevX.green_to_blue_) { cur_diff -= 3; // favor keeping the areas locally similar } - if (tx.green_to_blue_ == prevY.green_to_blue_) { + if ((uint8_t)green_to_blue == prevY.green_to_blue_) { cur_diff -= 3; // favor keeping the areas locally similar } - if (tx.red_to_blue_ == prevX.red_to_blue_) { + if ((uint8_t)red_to_blue == prevX.red_to_blue_) { cur_diff -= 3; // favor keeping the areas locally similar } - if (tx.red_to_blue_ == prevY.red_to_blue_) { + if ((uint8_t)red_to_blue == prevY.red_to_blue_) { cur_diff -= 3; // favor keeping the areas locally similar } - if (tx.green_to_blue_ == 0) { + if (green_to_blue == 0) { cur_diff -= 3; } - if (tx.red_to_blue_ == 0) { + if (red_to_blue == 0) { cur_diff -= 3; } if (cur_diff < best_diff) { best_diff = cur_diff; - best_tx = tx; + best_tx.green_to_blue_ = green_to_blue; + best_tx.red_to_blue_ = red_to_blue; } } } @@ -935,7 +1108,7 @@ static void ColorIndexInverseTransform( uint32_t packed_pixels = 0; int x; for (x = 0; x < width; ++x) { - // We need to load fresh 'packed_pixels' once every 'bytes_per_pixels' + // We need to load fresh 'packed_pixels' once every 'pixels_per_byte' // increments of x. Fortunately, pixels_per_byte is a power of 2, so // can just use a mask for that, instead of decrementing a counter. if ((x & count_mask) == 0) packed_pixels = ((*src++) >> 8) & 0xff; @@ -976,7 +1149,21 @@ void VP8LInverseTransform(const VP8LTransform* const transform, ColorSpaceInverseTransform(transform, row_start, row_end, out); break; case COLOR_INDEXING_TRANSFORM: - ColorIndexInverseTransform(transform, row_start, row_end, in, out); + if (in == out && transform->bits_ > 0) { + // Move packed pixels to the end of unpacked region, so that unpacking + // can occur seamlessly. + // Also, note that this is the only transform that applies on + // the effective width of VP8LSubSampleSize(xsize_, bits_). All other + // transforms work on effective width of xsize_. + const int out_stride = (row_end - row_start) * transform->xsize_; + const int in_stride = (row_end - row_start) * + VP8LSubSampleSize(transform->xsize_, transform->bits_); + uint32_t* const src = out + out_stride - in_stride; + memmove(src, out, in_stride * sizeof(*src)); + ColorIndexInverseTransform(transform, row_start, row_end, src, out); + } else { + ColorIndexInverseTransform(transform, row_start, row_end, in, out); + } break; } } @@ -1020,8 +1207,15 @@ static void ConvertBGRAToRGBA4444(const uint32_t* src, const uint32_t* const src_end = src + num_pixels; while (src < src_end) { const uint32_t argb = *src++; - *dst++ = ((argb >> 16) & 0xf0) | ((argb >> 12) & 0xf); - *dst++ = ((argb >> 0) & 0xf0) | ((argb >> 28) & 0xf); + const uint8_t rg = ((argb >> 16) & 0xf0) | ((argb >> 12) & 0xf); + const uint8_t ba = ((argb >> 0) & 0xf0) | ((argb >> 28) & 0xf); +#ifdef WEBP_SWAP_16BIT_CSP + *dst++ = ba; + *dst++ = rg; +#else + *dst++ = rg; + *dst++ = ba; +#endif } } @@ -1030,8 +1224,15 @@ static void ConvertBGRAToRGB565(const uint32_t* src, const uint32_t* const src_end = src + num_pixels; while (src < src_end) { const uint32_t argb = *src++; - *dst++ = ((argb >> 16) & 0xf8) | ((argb >> 13) & 0x7); - *dst++ = ((argb >> 5) & 0xe0) | ((argb >> 3) & 0x1f); + const uint8_t rg = ((argb >> 16) & 0xf8) | ((argb >> 13) & 0x7); + const uint8_t gb = ((argb >> 5) & 0xe0) | ((argb >> 3) & 0x1f); +#ifdef WEBP_SWAP_16BIT_CSP + *dst++ = gb; + *dst++ = rg; +#else + *dst++ = rg; + *dst++ = gb; +#endif } } @@ -1052,20 +1253,27 @@ static void CopyOrSwap(const uint32_t* src, int num_pixels, uint8_t* dst, const uint32_t* const src_end = src + num_pixels; while (src < src_end) { uint32_t argb = *src++; + +#if !defined(WEBP_REFERENCE_IMPLEMENTATION) #if !defined(__BIG_ENDIAN__) && (defined(__i386__) || defined(__x86_64__)) __asm__ volatile("bswap %0" : "=r"(argb) : "0"(argb)); *(uint32_t*)dst = argb; - dst += sizeof(argb); #elif !defined(__BIG_ENDIAN__) && defined(_MSC_VER) argb = _byteswap_ulong(argb); *(uint32_t*)dst = argb; - dst += sizeof(argb); #else - *dst++ = (argb >> 24) & 0xff; - *dst++ = (argb >> 16) & 0xff; - *dst++ = (argb >> 8) & 0xff; - *dst++ = (argb >> 0) & 0xff; + dst[0] = (argb >> 24) & 0xff; + dst[1] = (argb >> 16) & 0xff; + dst[2] = (argb >> 8) & 0xff; + dst[3] = (argb >> 0) & 0xff; #endif +#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 + dst += sizeof(argb); } } else { memcpy(dst, src, num_pixels * sizeof(*src)); diff --git a/third_party/libwebp/dsp/lossless.h b/third_party/libwebp/dsp/lossless.h index 992516f..0ac4ecb 100644 --- a/third_party/libwebp/dsp/lossless.h +++ b/third_party/libwebp/dsp/lossless.h @@ -59,10 +59,20 @@ static WEBP_INLINE uint32_t VP8LSubSampleSize(uint32_t size, return (size + (1 << sampling_bits) - 1) >> sampling_bits; } -// Faster logarithm for integers, with the property of log2(0) == 0. -float VP8LFastLog2(int v); +// Faster logarithm for integers. Small values use a look-up table. +#define LOG_LOOKUP_IDX_MAX 256 +extern const float kLog2Table[LOG_LOOKUP_IDX_MAX]; +extern const float kSLog2Table[LOG_LOOKUP_IDX_MAX]; +extern float VP8LFastLog2Slow(int v); +extern float VP8LFastSLog2Slow(int v); +static WEBP_INLINE float VP8LFastLog2(int v) { + return (v < LOG_LOOKUP_IDX_MAX) ? kLog2Table[v] : VP8LFastLog2Slow(v); +} // Fast calculation of v * log2(v) for integer input. -static WEBP_INLINE float VP8LFastSLog2(int v) { return VP8LFastLog2(v) * v; } +static WEBP_INLINE float VP8LFastSLog2(int v) { + return (v < LOG_LOOKUP_IDX_MAX) ? kSLog2Table[v] : VP8LFastSLog2Slow(v); +} + // In-place difference of each component with mod 256. static WEBP_INLINE uint32_t VP8LSubPixels(uint32_t a, uint32_t b) { diff --git a/third_party/libwebp/dsp/upsampling.c b/third_party/libwebp/dsp/upsampling.c index 9ca0492..91d939c 100644 --- a/third_party/libwebp/dsp/upsampling.c +++ b/third_party/libwebp/dsp/upsampling.c @@ -271,8 +271,7 @@ static void ApplyAlphaMultiply(uint8_t* rgba, int alpha_first, // rgbA4444 -#define MULTIPLIER(a) ((a) * 0x11) -#define PREMULTIPLY(x, m) (((x) * (m)) >> 12) +#define MULTIPLIER(a) ((a) * 0x1111) // 0x1111 ~= (1 << 16) / 15 static WEBP_INLINE uint8_t dither_hi(uint8_t x) { return (x & 0xf0) | (x >> 4); @@ -282,24 +281,27 @@ static WEBP_INLINE uint8_t dither_lo(uint8_t x) { return (x & 0x0f) | (x << 4); } +static WEBP_INLINE uint8_t multiply(uint8_t x, uint32_t m) { + return (x * m) >> 16; +} + static void ApplyAlphaMultiply4444(uint8_t* rgba4444, int w, int h, int stride) { while (h-- > 0) { int i; for (i = 0; i < w; ++i) { - const uint8_t a = dither_lo(rgba4444[2 * i + 1]); + const uint8_t a = (rgba4444[2 * i + 1] & 0x0f); const uint32_t mult = MULTIPLIER(a); - const uint8_t r = PREMULTIPLY(dither_hi(rgba4444[2 * i + 0]), mult); - const uint8_t g = PREMULTIPLY(dither_lo(rgba4444[2 * i + 0]), mult); - const uint8_t b = PREMULTIPLY(dither_hi(rgba4444[2 * i + 1]), mult); - rgba4444[2 * i + 0] = (r & 0xf0) | (g & 0x0f); + const uint8_t r = multiply(dither_hi(rgba4444[2 * i + 0]), mult); + const uint8_t g = multiply(dither_lo(rgba4444[2 * i + 0]), mult); + const uint8_t b = multiply(dither_hi(rgba4444[2 * i + 1]), mult); + rgba4444[2 * i + 0] = (r & 0xf0) | ((g >> 4) & 0x0f); rgba4444[2 * i + 1] = (b & 0xf0) | a; } rgba4444 += stride; } } #undef MULTIPLIER -#undef PREMULTIPLY void (*WebPApplyAlphaMultiply)(uint8_t*, int, int, int, int) = ApplyAlphaMultiply; @@ -326,6 +328,11 @@ void WebPInitUpsamplers(void) { WebPInitUpsamplersSSE2(); } #endif +#if defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + WebPInitUpsamplersNEON(); + } +#endif } #endif // FANCY_UPSAMPLING } @@ -346,6 +353,11 @@ void WebPInitPremultiply(void) { WebPInitPremultiplySSE2(); } #endif +#if defined(WEBP_USE_NEON) + if (VP8GetCPUInfo(kNEON)) { + WebPInitPremultiplyNEON(); + } +#endif } #endif // FANCY_UPSAMPLING } diff --git a/third_party/libwebp/dsp/upsampling_neon.c b/third_party/libwebp/dsp/upsampling_neon.c new file mode 100644 index 0000000..00e2f89 --- /dev/null +++ b/third_party/libwebp/dsp/upsampling_neon.c @@ -0,0 +1,292 @@ +// 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/ +// ----------------------------------------------------------------------------- +// +// 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(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if defined(WEBP_USE_NEON) + +#include <assert.h> +#include <arm_neon.h> +#include <string.h> +#include "./yuv.h" + +#ifdef FANCY_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); \ + \ + { \ + const uint8x8x2_t a_b = {{ a, b }}; \ + const uint8x8x2_t 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); \ +} + +#define CY 76283 +#define CVR 89858 +#define CUG 22014 +#define CVG 45773 +#define CUB 113618 + +static const int16_t coef[4] = { CVR / 4, CUG, CVG / 2, CUB / 4 }; + +#define CONVERT8(FMT, XSTEP, N, src_y, src_uv, out, cur_x) { \ + int i; \ + for (i = 0; i < N; i += 8) { \ + int off = ((cur_x) + i) * XSTEP; \ + uint8x8_t y = vld1_u8(src_y + (cur_x) + i); \ + uint8x8_t u = vld1_u8((src_uv) + i); \ + uint8x8_t v = vld1_u8((src_uv) + i + 16); \ + int16x8_t yy = vreinterpretq_s16_u16(vsubl_u8(y, u16)); \ + int16x8_t uu = vreinterpretq_s16_u16(vsubl_u8(u, u128)); \ + int16x8_t vv = vreinterpretq_s16_u16(vsubl_u8(v, u128)); \ + \ + int16x8_t ud = vshlq_n_s16(uu, 1); \ + int16x8_t vd = vshlq_n_s16(vv, 1); \ + \ + int32x4_t vrl = vqdmlal_lane_s16(vshll_n_s16(vget_low_s16(vv), 1), \ + vget_low_s16(vd), cf16, 0); \ + int32x4_t vrh = vqdmlal_lane_s16(vshll_n_s16(vget_high_s16(vv), 1), \ + vget_high_s16(vd), cf16, 0); \ + int16x8_t vr = vcombine_s16(vrshrn_n_s32(vrl, 16), \ + vrshrn_n_s32(vrh, 16)); \ + \ + int32x4_t vl = vmovl_s16(vget_low_s16(vv)); \ + int32x4_t vh = vmovl_s16(vget_high_s16(vv)); \ + int32x4_t ugl = vmlal_lane_s16(vl, vget_low_s16(uu), cf16, 1); \ + int32x4_t ugh = vmlal_lane_s16(vh, vget_high_s16(uu), cf16, 1); \ + int32x4_t gcl = vqdmlal_lane_s16(ugl, vget_low_s16(vv), cf16, 2); \ + int32x4_t gch = vqdmlal_lane_s16(ugh, vget_high_s16(vv), cf16, 2); \ + int16x8_t gc = vcombine_s16(vrshrn_n_s32(gcl, 16), \ + vrshrn_n_s32(gch, 16)); \ + \ + int32x4_t ubl = vqdmlal_lane_s16(vshll_n_s16(vget_low_s16(uu), 1), \ + vget_low_s16(ud), cf16, 3); \ + int32x4_t ubh = vqdmlal_lane_s16(vshll_n_s16(vget_high_s16(uu), 1), \ + vget_high_s16(ud), cf16, 3); \ + int16x8_t ub = vcombine_s16(vrshrn_n_s32(ubl, 16), \ + vrshrn_n_s32(ubh, 16)); \ + \ + int32x4_t rl = vaddl_s16(vget_low_s16(yy), vget_low_s16(vr)); \ + int32x4_t rh = vaddl_s16(vget_high_s16(yy), vget_high_s16(vr)); \ + int32x4_t gl = vsubl_s16(vget_low_s16(yy), vget_low_s16(gc)); \ + int32x4_t gh = vsubl_s16(vget_high_s16(yy), vget_high_s16(gc)); \ + int32x4_t bl = vaddl_s16(vget_low_s16(yy), vget_low_s16(ub)); \ + int32x4_t bh = vaddl_s16(vget_high_s16(yy), vget_high_s16(ub)); \ + \ + rl = vmulq_lane_s32(rl, cf32, 0); \ + rh = vmulq_lane_s32(rh, cf32, 0); \ + gl = vmulq_lane_s32(gl, cf32, 0); \ + gh = vmulq_lane_s32(gh, cf32, 0); \ + bl = vmulq_lane_s32(bl, cf32, 0); \ + bh = vmulq_lane_s32(bh, cf32, 0); \ + \ + y = vqmovun_s16(vcombine_s16(vrshrn_n_s32(rl, 16), \ + vrshrn_n_s32(rh, 16))); \ + u = vqmovun_s16(vcombine_s16(vrshrn_n_s32(gl, 16), \ + vrshrn_n_s32(gh, 16))); \ + v = vqmovun_s16(vcombine_s16(vrshrn_n_s32(bl, 16), \ + vrshrn_n_s32(bh, 16))); \ + STR_ ## FMT(out + off, y, u, v); \ + } \ +} + +#define v255 vmov_n_u8(255) + +#define STR_Rgb(out, r, g, b) do { \ + const uint8x8x3_t r_g_b = {{ r, g, b }}; \ + vst3_u8(out, r_g_b); \ +} while (0) + +#define STR_Bgr(out, r, g, b) do { \ + const uint8x8x3_t b_g_r = {{ b, g, r }}; \ + vst3_u8(out, b_g_r); \ +} while (0) + +#define STR_Rgba(out, r, g, b) do { \ + const uint8x8x4_t r_g_b_v255 = {{ r, g, b, v255 }}; \ + vst4_u8(out, r_g_b_v255); \ +} while (0) + +#define STR_Bgra(out, r, g, b) do { \ + const uint8x8x4_t b_g_r_v255 = {{ b, g, r, v255 }}; \ + vst4_u8(out, b_g_r_v255); \ +} while (0) + +#define CONVERT1(FMT, XSTEP, N, src_y, src_uv, rgb, cur_x) { \ + int i; \ + for (i = 0; i < N; i++) { \ + int off = ((cur_x) + i) * XSTEP; \ + int y = src_y[(cur_x) + i]; \ + int u = (src_uv)[i]; \ + int v = (src_uv)[i + 16]; \ + VP8YuvTo ## FMT(y, u, v, rgb + off); \ + } \ +} + +#define CONVERT2RGB_8(FMT, XSTEP, top_y, bottom_y, uv, \ + top_dst, bottom_dst, cur_x, len) { \ + if (top_y) { \ + CONVERT8(FMT, XSTEP, len, top_y, uv, top_dst, cur_x) \ + } \ + if (bottom_y) { \ + CONVERT8(FMT, XSTEP, len, bottom_y, (uv) + 32, bottom_dst, cur_x) \ + } \ +} + +#define CONVERT2RGB_1(FMT, XSTEP, top_y, bottom_y, uv, \ + top_dst, bottom_dst, cur_x, len) { \ + if (top_y) { \ + CONVERT1(FMT, XSTEP, len, top_y, uv, top_dst, cur_x); \ + } \ + if (bottom_y) { \ + CONVERT1(FMT, 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 cf16 = vld1_s16(coef); \ + const int32x2_t cf32 = vmov_n_s32(CY); \ + const uint8x8_t u16 = vmov_n_u8(16); \ + const uint8x8_t u128 = vmov_n_u8(128); \ + \ + /* Treat the first pixel in regular way */ \ + if (top_y) { \ + const int u0 = (top_u[0] + u_diag) >> 1; \ + const int v0 = (top_v[0] + v_diag) >> 1; \ + VP8YuvTo ## FMT(top_y[0], u0, v0, top_dst); \ + } \ + if (bottom_y) { \ + const int u0 = (cur_u[0] + u_diag) >> 1; \ + const int v0 = (cur_v[0] + v_diag) >> 1; \ + 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(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(UpsampleRgbLinePairNEON, Rgb, 3) +NEON_UPSAMPLE_FUNC(UpsampleBgrLinePairNEON, Bgr, 3) +NEON_UPSAMPLE_FUNC(UpsampleRgbaLinePairNEON, Rgba, 4) +NEON_UPSAMPLE_FUNC(UpsampleBgraLinePairNEON, Bgra, 4) + +#endif // FANCY_UPSAMPLING + +#endif // WEBP_USE_NEON + +//------------------------------------------------------------------------------ + +extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; + +void WebPInitUpsamplersNEON(void) { +#if defined(WEBP_USE_NEON) + WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePairNEON; + WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePairNEON; + WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePairNEON; + WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePairNEON; +#endif // WEBP_USE_NEON +} + +void WebPInitPremultiplyNEON(void) { +#if defined(WEBP_USE_NEON) + WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePairNEON; + WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePairNEON; +#endif // WEBP_USE_NEON +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/third_party/libwebp/dsp/upsampling_sse2.c b/third_party/libwebp/dsp/upsampling_sse2.c index 8cb275a..ba075d1 100644 --- a/third_party/libwebp/dsp/upsampling_sse2.c +++ b/third_party/libwebp/dsp/upsampling_sse2.c @@ -11,6 +11,10 @@ #include "./dsp.h" +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + #if defined(WEBP_USE_SSE2) #include <assert.h> @@ -18,10 +22,6 @@ #include <string.h> #include "./yuv.h" -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - #ifdef FANCY_UPSAMPLING // We compute (9*a + 3*b + 3*c + d + 8) / 16 as follows @@ -51,12 +51,12 @@ extern "C" { // pack and store two alterning pixel rows #define PACK_AND_STORE(a, b, da, db, out) do { \ - const __m128i ta = _mm_avg_epu8(a, da); /* (9a + 3b + 3c + d + 8) / 16 */ \ - const __m128i tb = _mm_avg_epu8(b, db); /* (3a + 9b + c + 3d + 8) / 16 */ \ - const __m128i t1 = _mm_unpacklo_epi8(ta, tb); \ - const __m128i t2 = _mm_unpackhi_epi8(ta, tb); \ - _mm_store_si128(((__m128i*)(out)) + 0, t1); \ - _mm_store_si128(((__m128i*)(out)) + 1, t2); \ + 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. @@ -128,7 +128,7 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ const uint8_t* top_u, const uint8_t* top_v, \ const uint8_t* cur_u, const uint8_t* cur_v, \ uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ - int b; \ + int block; \ /* 16 byte aligned array to cache reconstructed u and v */ \ uint8_t uv_buf[4 * 32 + 15]; \ uint8_t* const r_uv = (uint8_t*)((uintptr_t)(uv_buf + 15) & ~15); \ @@ -154,11 +154,11 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ FUNC(bottom_y[0], u0, v0, bottom_dst); \ } \ \ - for (b = 0; b < num_blocks; ++b) { \ + for (block = 0; block < num_blocks; ++block) { \ UPSAMPLE_32PIXELS(top_u, cur_u, r_uv + 0 * 32); \ UPSAMPLE_32PIXELS(top_v, cur_v, r_uv + 1 * 32); \ CONVERT2RGB(FUNC, XSTEP, top_y, bottom_y, r_uv, top_dst, bottom_dst, \ - 32 * b + 1, 32) \ + 32 * block + 1, 32) \ top_u += 16; \ cur_u += 16; \ top_v += 16; \ @@ -184,26 +184,32 @@ SSE2_UPSAMPLE_FUNC(UpsampleBgraLinePairSSE2, VP8YuvToBgra, 4) #undef CONVERT2RGB #undef SSE2_UPSAMPLE_FUNC +#endif // FANCY_UPSAMPLING + +#endif // WEBP_USE_SSE2 + //------------------------------------------------------------------------------ extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; void WebPInitUpsamplersSSE2(void) { +#if defined(WEBP_USE_SSE2) WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePairSSE2; WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePairSSE2; WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePairSSE2; WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePairSSE2; +#endif // WEBP_USE_SSE2 } void WebPInitPremultiplySSE2(void) { +#if defined(WEBP_USE_SSE2) WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePairSSE2; WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePairSSE2; +#endif // WEBP_USE_SSE2 } -#endif // FANCY_UPSAMPLING - #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif -#endif // WEBP_USE_SSE2 + diff --git a/third_party/libwebp/dsp/yuv.c b/third_party/libwebp/dsp/yuv.c index 7f05f9a..f8988ba 100644 --- a/third_party/libwebp/dsp/yuv.c +++ b/third_party/libwebp/dsp/yuv.c @@ -15,7 +15,7 @@ extern "C" { #endif -enum { YUV_HALF = 1 << (YUV_FIX - 1) }; +#ifdef WEBP_YUV_USE_TABLE int16_t VP8kVToR[256], VP8kUToB[256]; int32_t VP8kVToG[256], VP8kUToG[256]; @@ -33,6 +33,7 @@ void VP8YUVInit(void) { if (done) { return; } +#ifndef USE_YUVj for (i = 0; i < 256; ++i) { VP8kVToR[i] = (89858 * (i - 128) + YUV_HALF) >> YUV_FIX; VP8kUToG[i] = -22014 * (i - 128) + YUV_HALF; @@ -44,9 +45,29 @@ void VP8YUVInit(void) { VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255); VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15); } +#else + for (i = 0; i < 256; ++i) { + VP8kVToR[i] = (91881 * (i - 128) + YUV_HALF) >> YUV_FIX; + VP8kUToG[i] = -22554 * (i - 128) + YUV_HALF; + VP8kVToG[i] = -46802 * (i - 128); + VP8kUToB[i] = (116130 * (i - 128) + YUV_HALF) >> YUV_FIX; + } + for (i = YUV_RANGE_MIN; i < YUV_RANGE_MAX; ++i) { + const int k = i; + VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255); + VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15); + } +#endif + done = 1; } +#else + +void VP8YUVInit(void) {} + +#endif // WEBP_YUV_USE_TABLE + #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif diff --git a/third_party/libwebp/dsp/yuv.h b/third_party/libwebp/dsp/yuv.h index 22cb259..126404b 100644 --- a/third_party/libwebp/dsp/yuv.h +++ b/third_party/libwebp/dsp/yuv.h @@ -7,6 +7,26 @@ // // 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. +// +// For the Y'CbCr to RGB conversion, the BT.601 specification reads: +// R = 1.164 * (Y-16) + 1.596 * (V-128) +// G = 1.164 * (Y-16) - 0.813 * (V-128) - 0.391 * (U-128) +// B = 1.164 * (Y-16) + 2.018 * (U-128) +// where Y is in the [16,235] range, and U/V in the [16,240] range. +// In the table-lookup version (WEBP_YUV_USE_TABLE), the common factor +// "1.164 * (Y-16)" can be handled as an offset in the VP8kClip[] table. +// So in this case the formulae should be read as: +// R = 1.164 * [Y + 1.371 * (V-128) ] - 18.624 +// G = 1.164 * [Y - 0.698 * (V-128) - 0.336 * (U-128)] - 18.624 +// B = 1.164 * [Y + 1.733 * (U-128)] - 18.624 +// once factorized. Here too, 16bit fixed precision is used. +// // Author: Skal (pascal.massimino@gmail.com) #ifndef WEBP_DSP_YUV_H_ @@ -14,6 +34,19 @@ #include "../dec/decode_vp8.h" +// Define the following to use the LUT-based code: +#define WEBP_YUV_USE_TABLE + +#if defined(WEBP_EXPERIMENTAL_FEATURES) +// Do NOT activate this feature for real compression. This is only experimental! +// This flag is for comparison purpose against JPEG's "YUVj" natural colorspace. +// This colorspace is close to Rec.601's Y'CbCr model with the notable +// difference of allowing larger range for luma/chroma. +// See http://en.wikipedia.org/wiki/YCbCr#JPEG_conversion paragraph, and its +// difference with http://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.601_conversion +// #define USE_YUVj +#endif + //------------------------------------------------------------------------------ // YUV -> RGB conversion @@ -22,9 +55,14 @@ extern "C" { #endif enum { YUV_FIX = 16, // fixed-point precision + 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 }; + +#ifdef WEBP_YUV_USE_TABLE + extern int16_t VP8kVToR[256], VP8kUToB[256]; extern int32_t VP8kVToG[256], VP8kUToG[256]; extern uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN]; @@ -40,21 +78,32 @@ static WEBP_INLINE void VP8YuvToRgb(uint8_t y, uint8_t u, uint8_t v, rgb[2] = VP8kClip[y + b_off - YUV_RANGE_MIN]; } -static WEBP_INLINE void VP8YuvToRgb565(uint8_t y, uint8_t u, uint8_t v, - uint8_t* const rgb) { +static WEBP_INLINE void VP8YuvToBgr(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const bgr) { const int r_off = VP8kVToR[v]; const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; const int b_off = VP8kUToB[u]; - rgb[0] = ((VP8kClip[y + r_off - YUV_RANGE_MIN] & 0xf8) | - (VP8kClip[y + g_off - YUV_RANGE_MIN] >> 5)); - rgb[1] = (((VP8kClip[y + g_off - YUV_RANGE_MIN] << 3) & 0xe0) | - (VP8kClip[y + b_off - YUV_RANGE_MIN] >> 3)); + bgr[0] = VP8kClip[y + b_off - YUV_RANGE_MIN]; + bgr[1] = VP8kClip[y + g_off - YUV_RANGE_MIN]; + bgr[2] = VP8kClip[y + r_off - YUV_RANGE_MIN]; } -static WEBP_INLINE void 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 VP8YuvToRgb565(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const rgb) { + const int r_off = VP8kVToR[v]; + const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; + const int b_off = VP8kUToB[u]; + const uint8_t rg = ((VP8kClip[y + r_off - YUV_RANGE_MIN] & 0xf8) | + (VP8kClip[y + g_off - YUV_RANGE_MIN] >> 5)); + const uint8_t gb = (((VP8kClip[y + g_off - YUV_RANGE_MIN] << 3) & 0xe0) | + (VP8kClip[y + b_off - YUV_RANGE_MIN] >> 3)); +#ifdef WEBP_SWAP_16BIT_CSP + rgb[0] = gb; + rgb[1] = rg; +#else + rgb[0] = rg; + rgb[1] = gb; +#endif } static WEBP_INLINE void VP8YuvToRgba4444(uint8_t y, uint8_t u, uint8_t v, @@ -62,20 +111,104 @@ static WEBP_INLINE void VP8YuvToRgba4444(uint8_t y, uint8_t u, uint8_t v, const int r_off = VP8kVToR[v]; const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; const int b_off = VP8kUToB[u]; - // Don't update alpha (last 4 bits of argb[1]) - argb[0] = ((VP8kClip4Bits[y + r_off - YUV_RANGE_MIN] << 4) | - VP8kClip4Bits[y + g_off - YUV_RANGE_MIN]); - argb[1] = 0x0f | (VP8kClip4Bits[y + b_off - YUV_RANGE_MIN] << 4); + const uint8_t rg = ((VP8kClip4Bits[y + r_off - YUV_RANGE_MIN] << 4) | + VP8kClip4Bits[y + g_off - YUV_RANGE_MIN]); + const uint8_t ba = (VP8kClip4Bits[y + b_off - YUV_RANGE_MIN] << 4) | 0x0f; +#ifdef WEBP_SWAP_16BIT_CSP + argb[0] = ba; + argb[1] = rg; +#else + argb[0] = rg; + argb[1] = ba; +#endif +} + +#else // Table-free version (slower on x86) + +// These constants are 16b fixed-point version of ITU-R BT.601 constants +#define kYScale 76309 // 1.164 = 255 / 219 +#define kVToR 104597 // 1.596 = 255 / 112 * 0.701 +#define kUToG 25674 // 0.391 = 255 / 112 * 0.886 * 0.114 / 0.587 +#define kVToG 53278 // 0.813 = 255 / 112 * 0.701 * 0.299 / 0.587 +#define kUToB 132201 // 2.018 = 255 / 112 * 0.886 +#define kRCst (-kYScale * 16 - kVToR * 128 + YUV_HALF) +#define kGCst (-kYScale * 16 + kUToG * 128 + kVToG * 128 + YUV_HALF) +#define kBCst (-kYScale * 16 - kUToB * 128 + YUV_HALF) + +static WEBP_INLINE uint8_t VP8Clip8(int v) { + return ((v & ~YUV_MASK) == 0) ? (uint8_t)(v >> YUV_FIX) + : (v < 0) ? 0u : 255u; +} + +static WEBP_INLINE uint8_t VP8ClipN(int v, int N) { // clip to N bits + return ((v & ~YUV_MASK) == 0) ? (uint8_t)(v >> (YUV_FIX + (8 - N))) + : (v < 0) ? 0u : (255u >> (8 - N)); +} + +static WEBP_INLINE int VP8YUVToR(int y, int v) { + return kYScale * y + kVToR * v + kRCst; +} + +static WEBP_INLINE int VP8YUVToG(int y, int u, int v) { + return kYScale * y - kUToG * u - kVToG * v + kGCst; +} + +static WEBP_INLINE int VP8YUVToB(int y, int u) { + return kYScale * y + kUToB * u + kBCst; +} + +static WEBP_INLINE void VP8YuvToRgb(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const rgb) { + rgb[0] = VP8Clip8(VP8YUVToR(y, v)); + rgb[1] = VP8Clip8(VP8YUVToG(y, u, v)); + rgb[2] = VP8Clip8(VP8YUVToB(y, u)); } static WEBP_INLINE void VP8YuvToBgr(uint8_t y, uint8_t u, uint8_t v, uint8_t* const bgr) { - const int r_off = VP8kVToR[v]; - const int g_off = (VP8kVToG[v] + VP8kUToG[u]) >> YUV_FIX; - const int b_off = VP8kUToB[u]; - bgr[0] = VP8kClip[y + b_off - YUV_RANGE_MIN]; - bgr[1] = VP8kClip[y + g_off - YUV_RANGE_MIN]; - bgr[2] = VP8kClip[y + r_off - YUV_RANGE_MIN]; + bgr[0] = VP8Clip8(VP8YUVToB(y, u)); + bgr[1] = VP8Clip8(VP8YUVToG(y, u, v)); + bgr[2] = VP8Clip8(VP8YUVToR(y, v)); +} + +static WEBP_INLINE void VP8YuvToRgb565(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const rgb) { + const int r = VP8Clip8(VP8YUVToR(y, u)); + const int g = VP8ClipN(VP8YUVToG(y, u, v), 6); + const int b = VP8ClipN(VP8YUVToB(y, v), 5); + const uint8_t rg = (r & 0xf8) | (g >> 3); + const uint8_t gb = (g << 5) | b; +#ifdef WEBP_SWAP_16BIT_CSP + rgb[0] = gb; + rgb[1] = rg; +#else + rgb[0] = rg; + rgb[1] = gb; +#endif +} + +static WEBP_INLINE void VP8YuvToRgba4444(uint8_t y, uint8_t u, uint8_t v, + uint8_t* const argb) { + const int r = VP8Clip8(VP8YUVToR(y, u)); + const int g = VP8ClipN(VP8YUVToG(y, u, v), 4); + const int b = VP8Clip8(VP8YUVToB(y, v)); + const uint8_t rg = (r & 0xf0) | g; + const uint8_t ba = b | 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 + +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, @@ -90,28 +223,19 @@ static WEBP_INLINE void VP8YuvToRgba(uint8_t y, uint8_t u, uint8_t v, rgba[3] = 0xff; } -static WEBP_INLINE uint32_t VP8Clip4Bits(uint8_t c) { - const uint32_t v = (c + 8) >> 4; - return (v > 15) ? 15 : v; -} - // Must be called before everything, to initialize the tables. void VP8YUVInit(void); //------------------------------------------------------------------------------ // RGB -> YUV conversion -// The exact naming is Y'CbCr, following the ITU-R BT.601 standard. -// More information at: http://en.wikipedia.org/wiki/YCbCr -// Y = 0.2569 * R + 0.5044 * G + 0.0979 * B + 16 -// U = -0.1483 * R - 0.2911 * G + 0.4394 * B + 128 -// V = 0.4394 * R - 0.3679 * G - 0.0715 * B + 128 -// We use 16bit fixed point operations. static WEBP_INLINE int VP8ClipUV(int v) { - v = (v + (257 << (YUV_FIX + 2 - 1))) >> (YUV_FIX + 2); - return ((v & ~0xff) == 0) ? v : (v < 0) ? 0 : 255; + v = (v + (257 << (YUV_FIX + 2 - 1))) >> (YUV_FIX + 2); + return ((v & ~0xff) == 0) ? v : (v < 0) ? 0 : 255; } +#ifndef USE_YUVj + static WEBP_INLINE int VP8RGBToY(int r, int g, int b) { const int kRound = (1 << (YUV_FIX - 1)) + (16 << YUV_FIX); const int luma = 16839 * r + 33059 * g + 6420 * b; @@ -119,13 +243,38 @@ static WEBP_INLINE int VP8RGBToY(int r, int g, int b) { } static WEBP_INLINE int VP8RGBToU(int r, int g, int b) { - return VP8ClipUV(-9719 * r - 19081 * g + 28800 * b); + const int u = -9719 * r - 19081 * g + 28800 * b; + return VP8ClipUV(u); +} + +static WEBP_INLINE int VP8RGBToV(int r, int g, int b) { + const int v = +28800 * r - 24116 * g - 4684 * b; + return VP8ClipUV(v); +} + +#else + +// This JPEG-YUV colorspace, only for comparison! +// These are also 16-bit precision coefficients from Rec.601, but with full +// [0..255] output range. +static WEBP_INLINE int VP8RGBToY(int r, int g, int b) { + const int kRound = (1 << (YUV_FIX - 1)); + const int luma = 19595 * r + 38470 * g + 7471 * b; + return (luma + kRound) >> YUV_FIX; // no need to clip +} + +static WEBP_INLINE int VP8RGBToU(int r, int g, int b) { + const int u = -11058 * r - 21710 * g + 32768 * b; + return VP8ClipUV(u); } static WEBP_INLINE int VP8RGBToV(int r, int g, int b) { - return VP8ClipUV(+28800 * r - 24116 * g - 4684 * b); + const int v = 32768 * r - 27439 * g - 5329 * b; + return VP8ClipUV(v); } +#endif // USE_YUVj + #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif diff --git a/third_party/libwebp/enc/alpha.c b/third_party/libwebp/enc/alpha.c index 0e519b6..aadf88f 100644 --- a/third_party/libwebp/enc/alpha.c +++ b/third_party/libwebp/enc/alpha.c @@ -79,18 +79,17 @@ static int EncodeLossless(const uint8_t* const data, int width, int height, WebPConfigInit(&config); config.lossless = 1; config.method = effort_level; // impact is very small - // Set moderate default quality setting for alpha. Higher qualities (80 and - // above) could be very slow. - config.quality = 10.f + 15.f * effort_level; - if (config.quality > 100.f) config.quality = 100.f; + // Set a moderate default quality setting for alpha. + config.quality = 5.f * effort_level; + assert(config.quality >= 0 && config.quality <= 100.f); ok = VP8LBitWriterInit(&tmp_bw, (width * height) >> 3); ok = ok && (VP8LEncodeStream(&config, &picture, &tmp_bw) == VP8_ENC_OK); WebPPictureFree(&picture); if (ok) { - const uint8_t* const data = VP8LBitWriterFinish(&tmp_bw); - const size_t data_size = VP8LBitWriterNumBytes(&tmp_bw); - VP8BitWriterAppend(bw, data, data_size); + const uint8_t* const buffer = VP8LBitWriterFinish(&tmp_bw); + const size_t buffer_size = VP8LBitWriterNumBytes(&tmp_bw); + VP8BitWriterAppend(bw, buffer, buffer_size); } VP8LBitWriterDestroy(&tmp_bw); return ok && !bw->error_; @@ -128,8 +127,8 @@ static int EncodeAlphaInternal(const uint8_t* const data, int width, int height, VP8BitWriterAppend(bw, &header, ALPHA_HEADER_LEN); filter_func = WebPFilters[filter]; - if (filter_func) { - filter_func(data, width, height, 1, width, tmp_alpha); + if (filter_func != NULL) { + filter_func(data, width, height, width, tmp_alpha); alpha_src = tmp_alpha; } else { alpha_src = data; @@ -287,42 +286,80 @@ static int EncodeAlpha(VP8Encoder* const enc, //------------------------------------------------------------------------------ // 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. + free(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) { 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_; + WebPWorkerInit(worker); + worker->data1 = enc; + worker->data2 = NULL; + worker->hook = (WebPWorkerHook)CompressAlphaJob; + } } -int VP8EncFinishAlpha(VP8Encoder* const enc) { +int VP8EncStartAlpha(VP8Encoder* const enc) { if (enc->has_alpha_) { - const WebPConfig* config = enc->config_; - uint8_t* tmp_data = NULL; - size_t tmp_size = 0; - const int effort_level = config->method; // maps to [0..6] - const WEBP_FILTER_TYPE filter = - (config->alpha_filtering == 0) ? WEBP_FILTER_NONE : - (config->alpha_filtering == 1) ? WEBP_FILTER_FAST : - WEBP_FILTER_BEST; - - if (!EncodeAlpha(enc, config->alpha_quality, config->alpha_compression, - filter, effort_level, &tmp_data, &tmp_size)) { - return 0; + if (enc->thread_level_ > 0) { + WebPWorker* const worker = &enc->alpha_worker_; + if (!WebPWorkerReset(worker)) { // Makes sure worker is good to go. + return 0; + } + WebPWorkerLaunch(worker); + return 1; + } else { + return CompressAlphaJob(enc, NULL); // just do the job right away } - if (tmp_size != (uint32_t)tmp_size) { // Sanity check. - free(tmp_data); - return 0; + } + return 1; +} + +int VP8EncFinishAlpha(VP8Encoder* const enc) { + if (enc->has_alpha_) { + if (enc->thread_level_ > 0) { + WebPWorker* const worker = &enc->alpha_worker_; + if (!WebPWorkerSync(worker)) return 0; // error } - enc->alpha_data_size_ = (uint32_t)tmp_size; - enc->alpha_data_ = tmp_data; } return WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_); } -void VP8EncDeleteAlpha(VP8Encoder* const enc) { +int VP8EncDeleteAlpha(VP8Encoder* const enc) { + int ok = 1; + if (enc->thread_level_ > 0) { + WebPWorker* const worker = &enc->alpha_worker_; + ok = WebPWorkerSync(worker); // finish anything left in flight + WebPWorkerEnd(worker); // still need to end the worker, even if !ok + } free(enc->alpha_data_); enc->alpha_data_ = NULL; enc->alpha_data_size_ = 0; enc->has_alpha_ = 0; + return ok; } #if defined(__cplusplus) || defined(c_plusplus) diff --git a/third_party/libwebp/enc/analysis.c b/third_party/libwebp/enc/analysis.c index 22cfb49..221e9d0 100644 --- a/third_party/libwebp/enc/analysis.c +++ b/third_party/libwebp/enc/analysis.c @@ -23,10 +23,6 @@ extern "C" { #define MAX_ITERS_K_MEANS 6 -static int ClipAlpha(int alpha) { - return alpha < 0 ? 0 : alpha > 255 ? 255 : alpha; -} - //------------------------------------------------------------------------------ // Smooth the segment map by replacing isolated block by the majority of its // neighbours. @@ -72,50 +68,10 @@ static void SmoothSegmentMap(VP8Encoder* const enc) { } //------------------------------------------------------------------------------ -// Finalize Segment probability based on the coding tree - -static int GetProba(int a, int b) { - int proba; - const int total = a + b; - if (total == 0) return 255; // that's the default probability. - proba = (255 * a + total / 2) / total; - return proba; -} - -static void SetSegmentProbas(VP8Encoder* const enc) { - int p[NUM_MB_SEGMENTS] = { 0 }; - int n; - - for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) { - const VP8MBInfo* const mb = &enc->mb_info_[n]; - p[mb->segment_]++; - } - if (enc->pic_->stats) { - for (n = 0; n < NUM_MB_SEGMENTS; ++n) { - enc->pic_->stats->segment_size[n] = p[n]; - } - } - if (enc->segment_hdr_.num_segments_ > 1) { - uint8_t* const probas = enc->proba_.segments_; - probas[0] = GetProba(p[0] + p[1], p[2] + p[3]); - probas[1] = GetProba(p[0], p[1]); - probas[2] = GetProba(p[2], p[3]); - - enc->segment_hdr_.update_map_ = - (probas[0] != 255) || (probas[1] != 255) || (probas[2] != 255); - enc->segment_hdr_.size_ = - p[0] * (VP8BitCost(0, probas[0]) + VP8BitCost(0, probas[1])) + - p[1] * (VP8BitCost(0, probas[0]) + VP8BitCost(1, probas[1])) + - p[2] * (VP8BitCost(1, probas[0]) + VP8BitCost(0, probas[2])) + - p[3] * (VP8BitCost(1, probas[0]) + VP8BitCost(1, probas[2])); - } else { - enc->segment_hdr_.update_map_ = 0; - enc->segment_hdr_.size_ = 0; - } -} +// set segment susceptibility alpha_ / beta_ static WEBP_INLINE int clip(int v, int m, int M) { - return v < m ? m : v > M ? M : v; + return (v < m) ? m : (v > M) ? M : v; } static void SetSegmentAlphas(VP8Encoder* const enc, @@ -142,22 +98,63 @@ static void SetSegmentAlphas(VP8Encoder* const enc, } //------------------------------------------------------------------------------ +// Compute susceptibility based on DCT-coeff histograms: +// the higher, the "easier" the macroblock is to compress. + +#define MAX_ALPHA 255 // 8b of precision for susceptibilities. +#define ALPHA_SCALE (2 * MAX_ALPHA) // scaling factor for alpha. +#define DEFAULT_ALPHA (-1) +#define IS_BETTER_ALPHA(alpha, best_alpha) ((alpha) > (best_alpha)) + +static int FinalAlphaValue(int alpha) { + alpha = MAX_ALPHA - alpha; + return clip(alpha, 0, MAX_ALPHA); +} + +static int GetAlpha(const VP8Histogram* const histo) { + int max_value = 0, last_non_zero = 1; + int k; + int alpha; + for (k = 0; k <= MAX_COEFF_THRESH; ++k) { + const int value = histo->distribution[k]; + if (value > 0) { + if (value > max_value) max_value = value; + last_non_zero = k; + } + } + // '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. + alpha = (max_value > 1) ? ALPHA_SCALE * last_non_zero / max_value : 0; + return alpha; +} + +static void MergeHistograms(const VP8Histogram* const in, + VP8Histogram* const out) { + int i; + for (i = 0; i <= MAX_COEFF_THRESH; ++i) { + out->distribution[i] += in->distribution[i]; + } +} + +//------------------------------------------------------------------------------ // Simplified k-Means, to assign Nb segments based on alpha-histogram -static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { +static void AssignSegments(VP8Encoder* const enc, + const int alphas[MAX_ALPHA + 1]) { const int nb = enc->segment_hdr_.num_segments_; int centers[NUM_MB_SEGMENTS]; int weighted_average = 0; - int map[256]; + int map[MAX_ALPHA + 1]; int a, n, k; - int min_a = 0, max_a = 255, range_a; + int min_a = 0, max_a = MAX_ALPHA, range_a; // 'int' type is ok for histo, and won't overflow int accum[NUM_MB_SEGMENTS], dist_accum[NUM_MB_SEGMENTS]; // bracket the input - for (n = 0; n < 256 && alphas[n] == 0; ++n) {} + for (n = 0; n <= MAX_ALPHA && alphas[n] == 0; ++n) {} min_a = n; - for (n = 255; n > min_a && alphas[n] == 0; --n) {} + for (n = MAX_ALPHA; n > min_a && alphas[n] == 0; --n) {} max_a = n; range_a = max_a - min_a; @@ -210,7 +207,7 @@ static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { VP8MBInfo* const mb = &enc->mb_info_[n]; const int alpha = mb->alpha_; mb->segment_ = map[alpha]; - mb->alpha_ = centers[map[alpha]]; // just for the record. + mb->alpha_ = centers[map[alpha]]; // for the record. } if (nb > 1) { @@ -218,7 +215,6 @@ static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { if (smooth) SmoothSegmentMap(enc); } - SetSegmentProbas(enc); // Assign final proba SetSegmentAlphas(enc, centers, weighted_average); // pick some alphas. } @@ -227,24 +223,32 @@ static void AssignSegments(VP8Encoder* const enc, const int alphas[256]) { // susceptibility and set best modes for this macroblock. // Segment assignment is done later. -// Number of modes to inspect for alpha_ evaluation. For high-quality settings, -// we don't need to test all the possible modes during the analysis phase. +// Number of modes to inspect for alpha_ evaluation. For high-quality settings +// (method >= FAST_ANALYSIS_METHOD) we don't need to test all the possible modes +// during the analysis phase. +#define FAST_ANALYSIS_METHOD 4 // method above which we do partial analysis #define MAX_INTRA16_MODE 2 #define MAX_INTRA4_MODE 2 #define MAX_UV_MODE 2 static int MBAnalyzeBestIntra16Mode(VP8EncIterator* const it) { - const int max_mode = (it->enc_->method_ >= 3) ? MAX_INTRA16_MODE : 4; + const int max_mode = + (it->enc_->method_ >= FAST_ANALYSIS_METHOD) ? MAX_INTRA16_MODE + : NUM_PRED_MODES; int mode; - int best_alpha = -1; + int best_alpha = DEFAULT_ALPHA; int best_mode = 0; VP8MakeLuma16Preds(it); for (mode = 0; mode < max_mode; ++mode) { - const int alpha = VP8CollectHistogram(it->yuv_in_ + Y_OFF, - it->yuv_p_ + VP8I16ModeOffsets[mode], - 0, 16); - if (alpha > best_alpha) { + VP8Histogram histo = { { 0 } }; + int alpha; + + VP8CollectHistogram(it->yuv_in_ + Y_OFF, + it->yuv_p_ + VP8I16ModeOffsets[mode], + 0, 16, &histo); + alpha = GetAlpha(&histo); + if (IS_BETTER_ALPHA(alpha, best_alpha)) { best_alpha = alpha; best_mode = mode; } @@ -256,46 +260,63 @@ static int MBAnalyzeBestIntra16Mode(VP8EncIterator* const it) { static int MBAnalyzeBestIntra4Mode(VP8EncIterator* const it, int best_alpha) { uint8_t modes[16]; - const int max_mode = (it->enc_->method_ >= 3) ? MAX_INTRA4_MODE : NUM_BMODES; - int i4_alpha = 0; + const int max_mode = + (it->enc_->method_ >= FAST_ANALYSIS_METHOD) ? MAX_INTRA4_MODE + : NUM_BMODES; + int i4_alpha; + VP8Histogram total_histo = { { 0 } }; + int cur_histo = 0; + VP8IteratorStartI4(it); do { int mode; - int best_mode_alpha = -1; + int best_mode_alpha = DEFAULT_ALPHA; + VP8Histogram histos[2]; const uint8_t* const src = it->yuv_in_ + Y_OFF + VP8Scan[it->i4_]; VP8MakeIntra4Preds(it); for (mode = 0; mode < max_mode; ++mode) { - const int alpha = VP8CollectHistogram(src, - it->yuv_p_ + VP8I4ModeOffsets[mode], - 0, 1); - if (alpha > best_mode_alpha) { + int alpha; + + memset(&histos[cur_histo], 0, sizeof(histos[cur_histo])); + VP8CollectHistogram(src, it->yuv_p_ + VP8I4ModeOffsets[mode], + 0, 1, &histos[cur_histo]); + alpha = GetAlpha(&histos[cur_histo]); + if (IS_BETTER_ALPHA(alpha, best_mode_alpha)) { best_mode_alpha = alpha; modes[it->i4_] = mode; + cur_histo ^= 1; // keep track of best histo so far. } } - i4_alpha += best_mode_alpha; + // accumulate best histogram + MergeHistograms(&histos[cur_histo ^ 1], &total_histo); // Note: we reuse the original samples for predictors } while (VP8IteratorRotateI4(it, it->yuv_in_ + Y_OFF)); - if (i4_alpha > best_alpha) { + i4_alpha = GetAlpha(&total_histo); + if (IS_BETTER_ALPHA(i4_alpha, best_alpha)) { VP8SetIntra4Mode(it, modes); - best_alpha = ClipAlpha(i4_alpha); + best_alpha = i4_alpha; } return best_alpha; } static int MBAnalyzeBestUVMode(VP8EncIterator* const it) { - int best_alpha = -1; + int best_alpha = DEFAULT_ALPHA; int best_mode = 0; - const int max_mode = (it->enc_->method_ >= 3) ? MAX_UV_MODE : 4; + const int max_mode = + (it->enc_->method_ >= FAST_ANALYSIS_METHOD) ? MAX_UV_MODE + : NUM_PRED_MODES; int mode; VP8MakeChroma8Preds(it); for (mode = 0; mode < max_mode; ++mode) { - const int alpha = VP8CollectHistogram(it->yuv_in_ + U_OFF, - it->yuv_p_ + VP8UVModeOffsets[mode], - 16, 16 + 4 + 4); - if (alpha > best_alpha) { + VP8Histogram histo = { { 0 } }; + int alpha; + VP8CollectHistogram(it->yuv_in_ + U_OFF, + it->yuv_p_ + VP8UVModeOffsets[mode], + 16, 16 + 4 + 4, &histo); + alpha = GetAlpha(&histo); + if (IS_BETTER_ALPHA(alpha, best_alpha)) { best_alpha = alpha; best_mode = mode; } @@ -305,7 +326,8 @@ static int MBAnalyzeBestUVMode(VP8EncIterator* const it) { } static void MBAnalyze(VP8EncIterator* const it, - int alphas[256], int* const uv_alpha) { + int alphas[MAX_ALPHA + 1], + int* const alpha, int* const uv_alpha) { const VP8Encoder* const enc = it->enc_; int best_alpha, best_uv_alpha; @@ -314,7 +336,7 @@ static void MBAnalyze(VP8EncIterator* const it, VP8SetSegment(it, 0); // default segment, spec-wise. best_alpha = MBAnalyzeBestIntra16Mode(it); - if (enc->method_ != 3) { + if (enc->method_ >= 5) { // We go and make a fast decision for intra4/intra16. // It's usually not a good and definitive pick, but helps seeding the stats // about level bit-cost. @@ -324,10 +346,22 @@ static void MBAnalyze(VP8EncIterator* const it, best_uv_alpha = MBAnalyzeBestUVMode(it); // Final susceptibility mix - best_alpha = (best_alpha + best_uv_alpha + 1) / 2; + best_alpha = (3 * best_alpha + best_uv_alpha + 2) >> 2; + best_alpha = FinalAlphaValue(best_alpha); alphas[best_alpha]++; + it->mb_->alpha_ = best_alpha; // for later remapping. + + // Accumulate for later complexity analysis. + *alpha += best_alpha; // mixed susceptibility (not just luma) *uv_alpha += best_uv_alpha; - it->mb_->alpha_ = best_alpha; // Informative only. +} + +static void DefaultMBInfo(VP8MBInfo* const mb) { + mb->type_ = 1; // I16x16 + mb->uv_mode_ = 0; + mb->skip_ = 0; // not skipped + mb->segment_ = 0; // default segment + mb->alpha_ = 0; } //------------------------------------------------------------------------------ @@ -340,22 +374,43 @@ static void MBAnalyze(VP8EncIterator* const it, // 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_. + WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_); +} + int VP8EncAnalyze(VP8Encoder* const enc) { int ok = 1; - int alphas[256] = { 0 }; - VP8EncIterator it; - - VP8IteratorInit(enc, &it); + 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. + enc->alpha_ = 0; enc->uv_alpha_ = 0; - do { - VP8IteratorImport(&it); - MBAnalyze(&it, alphas, &enc->uv_alpha_); - ok = VP8IteratorProgress(&it, 20); - // Let's pretend we have perfect lossless reconstruction. - } while (ok && VP8IteratorNext(&it, it.yuv_in_)); - enc->uv_alpha_ /= enc->mb_w_ * enc->mb_h_; - if (ok) AssignSegments(enc, alphas); - + if (do_segments) { + int alphas[MAX_ALPHA + 1] = { 0 }; + VP8EncIterator it; + + VP8IteratorInit(enc, &it); + do { + VP8IteratorImport(&it); + MBAnalyze(&it, alphas, &enc->alpha_, &enc->uv_alpha_); + ok = VP8IteratorProgress(&it, 20); + // Let's pretend we have perfect lossless reconstruction. + } while (ok && VP8IteratorNext(&it, it.yuv_in_)); + enc->alpha_ /= enc->mb_w_ * enc->mb_h_; + enc->uv_alpha_ /= enc->mb_w_ * enc->mb_h_; + if (ok) AssignSegments(enc, alphas); + } else { // Use only one default segment. + ResetAllMBInfo(enc); + } return ok; } diff --git a/third_party/libwebp/enc/backward_references.c b/third_party/libwebp/enc/backward_references.c index b8c8ece..cf02787 100644 --- a/third_party/libwebp/enc/backward_references.c +++ b/third_party/libwebp/enc/backward_references.c @@ -141,21 +141,35 @@ static void HashChainInsert(HashChain* const p, p->hash_to_first_index_[hash_code] = pos; } +static void GetParamsForHashChainFindCopy(int quality, int xsize, + int* window_size, int* iter_pos, + int* iter_limit) { + const int iter_mult = (quality < 27) ? 1 : 1 + ((quality - 27) >> 4); + // Limit the backward-ref window size for lower qualities. + const int max_window_size = (quality > 50) ? WINDOW_SIZE + : (quality > 25) ? (xsize << 8) + : (xsize << 4); + assert(xsize > 0); + *window_size = (max_window_size > WINDOW_SIZE) ? WINDOW_SIZE + : max_window_size; + *iter_pos = 5 + (quality >> 3); + *iter_limit = -quality * iter_mult; +} + static int HashChainFindCopy(const HashChain* const p, - int quality, int index, int xsize, + int base_position, int xsize, const uint32_t* const argb, int maxlen, + int window_size, int iter_pos, int iter_limit, int* const distance_ptr, int* const length_ptr) { - const uint64_t hash_code = GetPixPairHash64(&argb[index]); + const uint64_t hash_code = GetPixPairHash64(&argb[base_position]); int prev_length = 0; int64_t best_val = 0; int best_length = 0; int best_distance = 0; - const uint32_t* const argb_start = argb + index; - const int iter_min_mult = (quality < 50) ? 2 : (quality < 75) ? 4 : 8; - const int iter_min = -quality * iter_min_mult; - int iter_cnt = 10 + (quality >> 1); - const int min_pos = (index > WINDOW_SIZE) ? index - WINDOW_SIZE : 0; + const uint32_t* const argb_start = argb + base_position; + const int min_pos = + (base_position > window_size) ? base_position - window_size : 0; int pos; assert(xsize > 0); @@ -164,12 +178,12 @@ static int HashChainFindCopy(const HashChain* const p, pos = p->chain_[pos]) { int64_t val; int curr_length; - if (iter_cnt < 0) { - if (iter_cnt < iter_min || best_val >= 0xff0000) { + if (iter_pos < 0) { + if (iter_pos < iter_limit || best_val >= 0xff0000) { break; } } - --iter_cnt; + --iter_pos; if (best_length != 0 && argb[pos + best_length - 1] != argb_start[best_length - 1]) { continue; @@ -180,9 +194,9 @@ static int HashChainFindCopy(const HashChain* const p, } val = 65536 * curr_length; // Favoring 2d locality here gives savings for certain images. - if (index - pos < 9 * xsize) { - const int y = (index - pos) / xsize; - int x = (index - pos) % xsize; + if (base_position - pos < 9 * xsize) { + const int y = (base_position - pos) / xsize; + int x = (base_position - pos) % xsize; if (x > xsize / 2) { x = xsize - x; } @@ -198,7 +212,7 @@ static int HashChainFindCopy(const HashChain* const p, prev_length = curr_length; best_val = val; best_length = curr_length; - best_distance = index - pos; + best_distance = base_position - pos; if (curr_length >= MAX_LENGTH) { break; } @@ -257,6 +271,9 @@ static int BackwardReferencesHashChain(int xsize, int ysize, const int pix_count = xsize * ysize; HashChain* const hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); VP8LColorCache hashers; + int window_size = WINDOW_SIZE; + int iter_pos = 1; + int iter_limit = -1; if (hash_chain == NULL) return 0; if (use_color_cache) { @@ -267,6 +284,8 @@ static int BackwardReferencesHashChain(int xsize, int ysize, if (!HashChainInit(hash_chain, pix_count)) goto Error; refs->size = 0; + GetParamsForHashChainFindCopy(quality, xsize, &window_size, &iter_pos, + &iter_limit); for (i = 0; i < pix_count; ) { // Alternative#1: Code the pixels starting at 'i' using backward reference. int offset = 0; @@ -276,7 +295,8 @@ static int BackwardReferencesHashChain(int xsize, int ysize, if (maxlen > MAX_LENGTH) { maxlen = MAX_LENGTH; } - HashChainFindCopy(hash_chain, quality, i, xsize, argb, maxlen, + HashChainFindCopy(hash_chain, i, xsize, argb, maxlen, + window_size, iter_pos, iter_limit, &offset, &len); } if (len >= MIN_LENGTH) { @@ -291,8 +311,9 @@ static int BackwardReferencesHashChain(int xsize, int ysize, if (maxlen > MAX_LENGTH) { maxlen = MAX_LENGTH; } - HashChainFindCopy(hash_chain, quality, - i + 1, xsize, argb, maxlen, &offset2, &len2); + HashChainFindCopy(hash_chain, i + 1, xsize, argb, maxlen, + window_size, iter_pos, iter_limit, + &offset2, &len2); if (len2 > len + 1) { const uint32_t pixel = argb[i]; // Alternative#2 is a better match. So push pixel at 'i' as literal. @@ -362,7 +383,8 @@ typedef struct { static int BackwardReferencesTraceBackwards( int xsize, int ysize, int recursive_cost_model, - const uint32_t* const argb, int cache_bits, VP8LBackwardRefs* const refs); + const uint32_t* const argb, int quality, int cache_bits, + VP8LBackwardRefs* const refs); static void ConvertPopulationCountTableToBitEstimates( int num_symbols, const int population_counts[], double output[]) { @@ -387,17 +409,16 @@ static void ConvertPopulationCountTableToBitEstimates( static int CostModelBuild(CostModel* const m, int xsize, int ysize, int recursion_level, const uint32_t* const argb, - int cache_bits) { + int quality, int cache_bits) { int ok = 0; VP8LHistogram histo; VP8LBackwardRefs refs; - const int quality = 100; if (!VP8LBackwardRefsAlloc(&refs, xsize * ysize)) goto Error; if (recursion_level > 0) { if (!BackwardReferencesTraceBackwards(xsize, ysize, recursion_level - 1, - argb, cache_bits, &refs)) { + argb, quality, cache_bits, &refs)) { goto Error; } } else { @@ -452,20 +473,23 @@ static WEBP_INLINE double GetDistanceCost(const CostModel* const m, static int BackwardReferencesHashChainDistanceOnly( int xsize, int ysize, int recursive_cost_model, const uint32_t* const argb, - int cache_bits, uint32_t* const dist_array) { + int quality, int cache_bits, uint32_t* const dist_array) { int i; int ok = 0; int cc_init = 0; - const int quality = 100; const int pix_count = xsize * ysize; const int use_color_cache = (cache_bits > 0); - double* const cost = - (double*)WebPSafeMalloc((uint64_t)pix_count, sizeof(*cost)); + float* const cost = + (float*)WebPSafeMalloc((uint64_t)pix_count, sizeof(*cost)); CostModel* cost_model = (CostModel*)malloc(sizeof(*cost_model)); HashChain* hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); VP8LColorCache hashers; const double mul0 = (recursive_cost_model != 0) ? 1.0 : 0.68; const double mul1 = (recursive_cost_model != 0) ? 1.0 : 0.82; + const int min_distance_code = 2; // TODO(vikasa): tune as function of quality + int window_size = WINDOW_SIZE; + int iter_pos = 1; + int iter_limit = -1; if (cost == NULL || cost_model == NULL || hash_chain == NULL) goto Error; @@ -477,15 +501,17 @@ static int BackwardReferencesHashChainDistanceOnly( } if (!CostModelBuild(cost_model, xsize, ysize, recursive_cost_model, argb, - cache_bits)) { + quality, cache_bits)) { goto Error; } - for (i = 0; i < pix_count; ++i) cost[i] = 1e100; + for (i = 0; i < pix_count; ++i) cost[i] = 1e38f; // We loop one pixel at a time, but store all currently best points to // non-processed locations from this point. dist_array[0] = 0; + GetParamsForHashChainFindCopy(quality, xsize, &window_size, &iter_pos, + &iter_limit); for (i = 0; i < pix_count; ++i) { double prev_cost = 0.0; int shortmax; @@ -500,7 +526,8 @@ static int BackwardReferencesHashChainDistanceOnly( if (maxlen > pix_count - i) { maxlen = pix_count - i; } - HashChainFindCopy(hash_chain, quality, i, xsize, argb, maxlen, + HashChainFindCopy(hash_chain, i, xsize, argb, maxlen, + window_size, iter_pos, iter_limit, &offset, &len); } if (len >= MIN_LENGTH) { @@ -509,16 +536,15 @@ static int BackwardReferencesHashChainDistanceOnly( prev_cost + GetDistanceCost(cost_model, code); int k; for (k = 1; k < len; ++k) { - const double cost_val = - distance_cost + GetLengthCost(cost_model, k); + const double cost_val = distance_cost + GetLengthCost(cost_model, k); if (cost[i + k] > cost_val) { - cost[i + k] = cost_val; + cost[i + k] = (float)cost_val; dist_array[i + k] = k + 1; } } // This if is for speedup only. It roughly doubles the speed, and // makes compression worse by .1 %. - if (len >= 128 && code < 2) { + if (len >= 128 && code <= min_distance_code) { // Long copy for short distances, let's skip the middle // lookups for better copies. // 1) insert the hashes. @@ -529,10 +555,10 @@ static int BackwardReferencesHashChainDistanceOnly( } // 2) Add to the hash_chain (but cannot add the last pixel) { - const int last = (len < pix_count - 1 - i) ? len - : pix_count - 1 - i; - for (k = 0; k < last; ++k) { - HashChainInsert(hash_chain, &argb[i + k], i + k); + const int last = (len + i < pix_count - 1) ? len + i + : pix_count - 1; + for (k = i; k < last; ++k) { + HashChainInsert(hash_chain, &argb[k], k); } } // 3) jump. @@ -554,7 +580,7 @@ static int BackwardReferencesHashChainDistanceOnly( cost_val += GetLiteralCost(cost_model, argb[i]) * mul1; } if (cost[i] > cost_val) { - cost[i] = cost_val; + cost[i] = (float)cost_val; dist_array[i] = 1; // only one is inserted. } if (use_color_cache) VP8LColorCacheInsert(&hashers, argb[i]); @@ -572,40 +598,30 @@ Error: return ok; } -static int TraceBackwards(const uint32_t* const dist_array, - int dist_array_size, - uint32_t** const chosen_path, - int* const chosen_path_size) { - int i; - // Count how many. - int count = 0; - for (i = dist_array_size - 1; i >= 0; ) { - int k = dist_array[i]; - assert(k >= 1); - ++count; - i -= k; - } - // Allocate. - *chosen_path_size = count; - *chosen_path = - (uint32_t*)WebPSafeMalloc((uint64_t)count, sizeof(**chosen_path)); - if (*chosen_path == NULL) return 0; - - // Write in reverse order. - for (i = dist_array_size - 1; i >= 0; ) { - int k = dist_array[i]; - assert(k >= 1); - (*chosen_path)[--count] = k; - i -= k; - } - return 1; +// 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(uint32_t* const dist_array, + int dist_array_size, + uint32_t** const chosen_path, + int* const chosen_path_size) { + uint32_t* path = dist_array + dist_array_size; + uint32_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( - int xsize, int ysize, const uint32_t* const argb, int cache_bits, + int xsize, int ysize, const uint32_t* const argb, + int quality, int cache_bits, const uint32_t* const chosen_path, int chosen_path_size, VP8LBackwardRefs* const refs) { - const int quality = 100; const int pix_count = xsize * ysize; const int use_color_cache = (cache_bits > 0); int size = 0; @@ -614,6 +630,9 @@ static int BackwardReferencesHashChainFollowChosenPath( int ix; int ok = 0; int cc_init = 0; + int window_size = WINDOW_SIZE; + int iter_pos = 1; + int iter_limit = -1; HashChain* hash_chain = (HashChain*)malloc(sizeof(*hash_chain)); VP8LColorCache hashers; @@ -626,13 +645,16 @@ static int BackwardReferencesHashChainFollowChosenPath( } refs->size = 0; + GetParamsForHashChainFindCopy(quality, xsize, &window_size, &iter_pos, + &iter_limit); for (ix = 0; ix < chosen_path_size; ++ix, ++size) { int offset = 0; int len = 0; int maxlen = chosen_path[ix]; if (maxlen != 1) { - HashChainFindCopy(hash_chain, quality, - i, xsize, argb, maxlen, &offset, &len); + HashChainFindCopy(hash_chain, i, xsize, argb, maxlen, + window_size, iter_pos, iter_limit, + &offset, &len); assert(len == maxlen); refs->refs[size] = PixOrCopyCreateCopy(offset, len); if (use_color_cache) { @@ -675,7 +697,7 @@ Error: static int BackwardReferencesTraceBackwards(int xsize, int ysize, int recursive_cost_model, const uint32_t* const argb, - int cache_bits, + int quality, int cache_bits, VP8LBackwardRefs* const refs) { int ok = 0; const int dist_array_size = xsize * ysize; @@ -687,22 +709,18 @@ static int BackwardReferencesTraceBackwards(int xsize, int ysize, if (dist_array == NULL) goto Error; if (!BackwardReferencesHashChainDistanceOnly( - xsize, ysize, recursive_cost_model, argb, cache_bits, dist_array)) { - goto Error; - } - if (!TraceBackwards(dist_array, dist_array_size, - &chosen_path, &chosen_path_size)) { + xsize, ysize, recursive_cost_model, argb, quality, cache_bits, + dist_array)) { goto Error; } - free(dist_array); // no need to retain this memory any longer - dist_array = NULL; + TraceBackwards(dist_array, dist_array_size, &chosen_path, &chosen_path_size); if (!BackwardReferencesHashChainFollowChosenPath( - xsize, ysize, argb, cache_bits, chosen_path, chosen_path_size, refs)) { + xsize, ysize, argb, quality, cache_bits, chosen_path, chosen_path_size, + refs)) { goto Error; } ok = 1; Error: - free(chosen_path); free(dist_array); return ok; } @@ -762,8 +780,8 @@ int VP8LGetBackwardReferences(int width, int height, // Choose appropriate backward reference. if (lz77_is_useful) { - // TraceBackwards is costly. Run it for higher qualities. - const int try_lz77_trace_backwards = (quality >= 75); + // TraceBackwards is costly. Don't execute it at lower quality (q <= 10). + const int try_lz77_trace_backwards = (quality > 10); *best = refs_lz77; // default guess: lz77 is better VP8LClearBackwardRefs(&refs_rle); if (try_lz77_trace_backwards) { @@ -772,8 +790,8 @@ int VP8LGetBackwardReferences(int width, int height, if (!VP8LBackwardRefsAlloc(&refs_trace, num_pix)) { goto End; } - if (BackwardReferencesTraceBackwards( - width, height, recursion_level, argb, cache_bits, &refs_trace)) { + if (BackwardReferencesTraceBackwards(width, height, recursion_level, argb, + quality, cache_bits, &refs_trace)) { VP8LClearBackwardRefs(&refs_lz77); *best = refs_trace; } diff --git a/third_party/libwebp/enc/backward_references.h b/third_party/libwebp/enc/backward_references.h index 91c0336..8cb1a7a 100644 --- a/third_party/libwebp/enc/backward_references.h +++ b/third_party/libwebp/enc/backward_references.h @@ -35,7 +35,8 @@ extern "C" { #if defined(__GNUC__) && \ ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4) static WEBP_INLINE int BitsLog2Floor(uint32_t n) { - return n == 0 ? -1 : 31 ^ __builtin_clz(n); + assert(n != 0); + return 31 ^ __builtin_clz(n); } #elif defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86)) #include <intrin.h> @@ -43,15 +44,18 @@ static WEBP_INLINE int BitsLog2Floor(uint32_t n) { static WEBP_INLINE int BitsLog2Floor(uint32_t n) { unsigned long first_set_bit; - return _BitScanReverse(&first_set_bit, n) ? first_set_bit : -1; + assert(n != 0); + _BitScanReverse(&first_set_bit, n); + return first_set_bit; } #else +// Returns (int)floor(log2(n)). n must be > 0. static WEBP_INLINE int BitsLog2Floor(uint32_t n) { int log = 0; uint32_t value = n; int i; - if (value == 0) return -1; + assert(n != 0); for (i = 4; i >= 0; --i) { const int shift = (1 << i); const uint32_t x = value >> shift; @@ -65,11 +69,11 @@ static WEBP_INLINE int BitsLog2Floor(uint32_t n) { #endif static WEBP_INLINE int VP8LBitsLog2Ceiling(uint32_t n) { - const int floor = BitsLog2Floor(n); + const int log_floor = BitsLog2Floor(n); if (n == (n & ~(n - 1))) // zero or a power of two. - return floor; + return log_floor; else - return floor + 1; + return log_floor + 1; } // Splitting of distance and length codes into prefixes and @@ -78,16 +82,17 @@ static WEBP_INLINE int VP8LBitsLog2Ceiling(uint32_t n) { static WEBP_INLINE void PrefixEncode(int distance, int* const code, int* const extra_bits_count, int* const extra_bits_value) { - // Collect the two most significant bits where the highest bit is 1. - const int highest_bit = BitsLog2Floor(--distance); - // & 0x3f is to make behavior well defined when highest_bit - // does not exist or is the least significant bit. - const int second_highest_bit = - (distance >> ((highest_bit - 1) & 0x3f)) & 1; - *extra_bits_count = (highest_bit > 0) ? (highest_bit - 1) : 0; - *extra_bits_value = distance & ((1 << *extra_bits_count) - 1); - *code = (highest_bit > 0) ? (2 * highest_bit + second_highest_bit) - : (highest_bit == 0) ? 1 : 0; + if (distance > 2) { // Collect the two most significant bits. + const int highest_bit = BitsLog2Floor(--distance); + const int second_highest_bit = (distance >> (highest_bit - 1)) & 1; + *extra_bits_count = highest_bit - 1; + *extra_bits_value = distance & ((1 << *extra_bits_count) - 1); + *code = 2 * highest_bit + second_highest_bit; + } else { + *extra_bits_count = 0; + *extra_bits_value = 0; + *code = (distance == 2) ? 1 : 0; + } } // ----------------------------------------------------------------------------- diff --git a/third_party/libwebp/enc/config.c b/third_party/libwebp/enc/config.c index 1a26113..bb88111 100644 --- a/third_party/libwebp/enc/config.c +++ b/third_party/libwebp/enc/config.c @@ -31,9 +31,9 @@ int WebPConfigInitInternal(WebPConfig* config, config->target_PSNR = 0.; config->method = 4; config->sns_strength = 50; - config->filter_strength = 20; // default: light filtering + config->filter_strength = 60; // rather high filtering, helps w/ gradients. config->filter_sharpness = 0; - config->filter_type = 0; // default: simple + config->filter_type = 1; // default: strong (so U/V is filtered too) config->partitions = 0; config->segments = 4; config->pass = 1; @@ -46,6 +46,9 @@ int WebPConfigInitInternal(WebPConfig* config, config->alpha_quality = 100; config->lossless = 0; config->image_hint = WEBP_HINT_DEFAULT; + config->emulate_jpeg_size = 0; + config->thread_level = 0; + config->low_memory = 0; // TODO(skal): tune. switch (preset) { @@ -122,6 +125,12 @@ int WebPValidateConfig(const WebPConfig* config) { 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; return 1; } diff --git a/third_party/libwebp/enc/cost.c b/third_party/libwebp/enc/cost.c index 14b357b..92e0cc7 100644 --- a/third_party/libwebp/enc/cost.c +++ b/third_party/libwebp/enc/cost.c @@ -354,6 +354,9 @@ static int VariableLevelCost(int level, const uint8_t probas[NUM_PROBAS]) { void VP8CalculateLevelCosts(VP8Proba* const proba) { int ctype, band, ctx; + + if (!proba->dirty_) return; // nothing to do. + for (ctype = 0; ctype < NUM_TYPES; ++ctype) { for (band = 0; band < NUM_BANDS; ++band) { for(ctx = 0; ctx < NUM_CTX; ++ctx) { @@ -370,6 +373,7 @@ void VP8CalculateLevelCosts(VP8Proba* const proba) { } } } + proba->dirty_ = 0; } //------------------------------------------------------------------------------ diff --git a/third_party/libwebp/enc/cost.h b/third_party/libwebp/enc/cost.h index 4f55e2c..09b75b6 100644 --- a/third_party/libwebp/enc/cost.h +++ b/third_party/libwebp/enc/cost.h @@ -26,18 +26,12 @@ static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) { return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba]; } -// Cost of coding 'nb' 1's and 'total-nb' 0's using 'proba' probability. -static WEBP_INLINE uint64_t VP8BranchCost(uint64_t nb, uint64_t total, - uint8_t proba) { - return nb * VP8BitCost(1, proba) + (total - nb) * VP8BitCost(0, proba); -} - // Level cost calculations extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2]; void VP8CalculateLevelCosts(VP8Proba* const proba); static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) { return VP8LevelFixedCosts[level] - + table[level > MAX_VARIABLE_LEVEL ? MAX_VARIABLE_LEVEL : level]; + + table[(level > MAX_VARIABLE_LEVEL) ? MAX_VARIABLE_LEVEL : level]; } // Mode costs diff --git a/third_party/libwebp/enc/frame.c b/third_party/libwebp/enc/frame.c index d0ddb46..9520618 100644 --- a/third_party/libwebp/enc/frame.c +++ b/third_party/libwebp/enc/frame.c @@ -9,6 +9,7 @@ // // Author: Skal (pascal.massimino@gmail.com) +#include <assert.h> #include <stdlib.h> #include <string.h> #include <math.h> @@ -44,18 +45,18 @@ const uint8_t VP8EncBands[16 + 1] = { 0 // sentinel }; -static const uint8_t kCat3[] = { 173, 148, 140 }; -static const uint8_t kCat4[] = { 176, 155, 140, 135 }; -static const uint8_t kCat5[] = { 180, 157, 141, 134, 130 }; -static const uint8_t kCat6[] = +const uint8_t VP8Cat3[] = { 173, 148, 140 }; +const uint8_t VP8Cat4[] = { 176, 155, 140, 135 }; +const uint8_t VP8Cat5[] = { 180, 157, 141, 134, 130 }; +const uint8_t VP8Cat6[] = { 254, 254, 243, 230, 196, 177, 153, 140, 133, 130, 129 }; //------------------------------------------------------------------------------ // Reset the statistics about: number of skips, token proba, level cost,... -static void ResetStats(VP8Encoder* const enc, int precalc_cost) { +static void ResetStats(VP8Encoder* const enc) { VP8Proba* const proba = &enc->proba_; - if (precalc_cost) VP8CalculateLevelCosts(proba); + VP8CalculateLevelCosts(proba); proba->nb_skip_ = 0; } @@ -94,9 +95,14 @@ static void ResetTokenStats(VP8Encoder* const enc) { } // Record proba context used -static int Record(int bit, uint64_t* const stats) { - stats[0] += bit; - stats[1] += 1; +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; } @@ -107,31 +113,34 @@ static int Record(int bit, uint64_t* const stats) { // Note: no need to record the fixed probas. static int RecordCoeffs(int ctx, const VP8Residual* const res) { int n = res->first; - uint64_t (*s)[2] = res->stats[VP8EncBands[n]][ctx]; - if (!Record(res->last >= 0, s[0])) { + // 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 (1) { - int v = res->coeffs[n++]; - if (!Record(v != 0, s[1])) { + 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]; - continue; } - if (!Record(2u < (unsigned int)(v + 1), s[2])) { // v = -1 or 1 + 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]); + 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]); + Record((v >= 3 + (8 << 3)), s + 10); } #else if (v > MAX_VARIABLE_LEVEL) @@ -143,44 +152,53 @@ static int RecordCoeffs(int ctx, const VP8Residual* const res) { int i; for (i = 0; (pattern >>= 1) != 0; ++i) { const int mask = 2 << i; - if (pattern & 1) Record(!!(bits & mask), s[3 + i]); + if (pattern & 1) Record(!!(bits & mask), s + 3 + i); } } #endif s = res->stats[VP8EncBands[n]][2]; } - if (n == 16 || !Record(n <= res->last, s[0])) { - return 1; - } } + if (n < 16) Record(0, s + 0); + return 1; } // Collect statistics and deduce probabilities for next coding pass. // Return the total bit-cost for coding the probability updates. -static int CalcTokenProba(uint64_t nb, uint64_t total) { - return (int)(nb ? ((total - nb) * 255 + total / 2) / total : 255); +static int CalcTokenProba(int nb, int total) { + assert(nb <= total); + return nb ? (255 - nb * 255 / total) : 255; } -static int FinalizeTokenProbas(VP8Encoder* const enc) { - VP8Proba* const proba = &enc->proba_; +// Cost of coding 'nb' 1's and 'total-nb' 0's using 'proba' probability. +static int BranchCost(int nb, int total, int proba) { + return nb * VP8BitCost(1, proba) + (total - nb) * VP8BitCost(0, proba); +} + +static int FinalizeTokenProbas(VP8Proba* 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 uint64_t* const cnt = proba->stats_[t][b][c][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(cnt[0], cnt[1]); - const uint64_t old_cost = VP8BranchCost(cnt[0], cnt[1], old_p) - + VP8BitCost(0, update_proba); - const uint64_t new_cost = VP8BranchCost(cnt[0], cnt[1], new_p) - + VP8BitCost(1, update_proba) + 8 * 256; + 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; @@ -189,10 +207,52 @@ static int FinalizeTokenProbas(VP8Encoder* const enc) { } } } + 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; + } +} + +//------------------------------------------------------------------------------ // helper functions for residuals struct VP8Residual. static void InitResidual(int first, int coeff_type, @@ -220,40 +280,49 @@ static void SetResidualCoeffs(const int16_t* const coeffs, //------------------------------------------------------------------------------ // Mode costs -static int GetResidualCost(int ctx, const VP8Residual* const res) { +static int GetResidualCost(int ctx0, const VP8Residual* const res) { int n = res->first; - const uint8_t* p = res->prob[VP8EncBands[n]][ctx]; - const uint16_t *t = res->cost[VP8EncBands[n]][ctx]; - int last_p0 = p[0]; + // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 + int p0 = res->prob[n][ctx0][0]; + const uint16_t* t = res->cost[n][ctx0]; int cost; if (res->last < 0) { - return VP8BitCost(0, last_p0); + return VP8BitCost(0, p0); } cost = 0; - while (n <= res->last) { - const int v = res->coeffs[n]; + while (n < res->last) { + int v = res->coeffs[n]; const int b = VP8EncBands[n + 1]; ++n; if (v == 0) { - cost += VP8LevelCost(t, 0); - p = res->prob[b][0]; + // short-case for VP8LevelCost(t, 0) (note: VP8LevelFixedCosts[0] == 0): + cost += t[0]; t = res->cost[b][0]; continue; } - cost += VP8BitCost(1, last_p0); - if (2u >= (unsigned int)(v + 1)) { // v = -1 or 1 - cost += VP8LevelCost(t, 1); - p = res->prob[b][1]; - t = res->cost[b][1]; - } else { - cost += VP8LevelCost(t, abs(v)); - p = res->prob[b][2]; - t = res->cost[b][2]; + v = abs(v); + cost += VP8BitCost(1, p0); + cost += VP8LevelCost(t, v); + { + const int ctx = (v == 1) ? 1 : 2; + p0 = res->prob[b][ctx][0]; + t = res->cost[b][ctx]; + } + } + // Last coefficient is always non-zero + { + const int v = abs(res->coeffs[n]); + assert(v != 0); + cost += VP8BitCost(1, p0); + 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); } - last_p0 = p[0]; } - if (n < 16) cost += VP8BitCost(0, last_p0); return cost; } @@ -324,7 +393,8 @@ int VP8GetCostUV(VP8EncIterator* const it, const VP8ModeScore* const rd) { static int PutCoeffs(VP8BitWriter* const bw, int ctx, const VP8Residual* res) { int n = res->first; - const uint8_t* p = res->prob[VP8EncBands[n]][ctx]; + // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 + const uint8_t* p = res->prob[n][ctx]; if (!VP8PutBit(bw, res->last >= 0, p[0])) { return 0; } @@ -353,30 +423,30 @@ static int PutCoeffs(VP8BitWriter* const bw, int ctx, const VP8Residual* res) { } else { int mask; const uint8_t* tab; - if (v < 3 + (8 << 1)) { // kCat3 (3b) + if (v < 3 + (8 << 1)) { // VP8Cat3 (3b) VP8PutBit(bw, 0, p[8]); VP8PutBit(bw, 0, p[9]); v -= 3 + (8 << 0); mask = 1 << 2; - tab = kCat3; - } else if (v < 3 + (8 << 2)) { // kCat4 (4b) + tab = VP8Cat3; + } else if (v < 3 + (8 << 2)) { // VP8Cat4 (4b) VP8PutBit(bw, 0, p[8]); VP8PutBit(bw, 1, p[9]); v -= 3 + (8 << 1); mask = 1 << 3; - tab = kCat4; - } else if (v < 3 + (8 << 3)) { // kCat5 (5b) + tab = VP8Cat4; + } else if (v < 3 + (8 << 3)) { // VP8Cat5 (5b) VP8PutBit(bw, 1, p[8]); VP8PutBit(bw, 0, p[10]); v -= 3 + (8 << 2); mask = 1 << 4; - tab = kCat5; - } else { // kCat6 (11b) + tab = VP8Cat5; + } else { // VP8Cat6 (11b) VP8PutBit(bw, 1, p[8]); VP8PutBit(bw, 1, p[10]); v -= 3 + (8 << 3); mask = 1 << 10; - tab = kCat6; + tab = VP8Cat6; } while (mask) { VP8PutBit(bw, !!(v & mask), *tab++); @@ -393,8 +463,7 @@ static int PutCoeffs(VP8BitWriter* const bw, int ctx, const VP8Residual* res) { return 1; } -static void CodeResiduals(VP8BitWriter* const bw, - VP8EncIterator* const it, +static void CodeResiduals(VP8BitWriter* const bw, VP8EncIterator* const it, const VP8ModeScore* const rd) { int x, y, ch; VP8Residual res; @@ -494,146 +563,23 @@ static void RecordResiduals(VP8EncIterator* const it, //------------------------------------------------------------------------------ // Token buffer -#ifdef USE_TOKEN_BUFFER - -void VP8TBufferInit(VP8TBuffer* const b) { - b->rows_ = NULL; - b->tokens_ = NULL; - b->last_ = &b->rows_; - b->left_ = 0; - b->error_ = 0; -} - -int VP8TBufferNewPage(VP8TBuffer* const b) { - VP8Tokens* const page = b->error_ ? NULL : (VP8Tokens*)malloc(sizeof(*page)); - if (page == NULL) { - b->error_ = 1; - return 0; - } - *b->last_ = page; - b->last_ = &page->next_; - b->left_ = MAX_NUM_TOKEN; - b->tokens_ = page->tokens_; - return 1; -} - -void VP8TBufferClear(VP8TBuffer* const b) { - if (b != NULL) { - const VP8Tokens* p = b->rows_; - while (p != NULL) { - const VP8Tokens* const next = p->next_; - free((void*)p); - p = next; - } - VP8TBufferInit(b); - } -} - -int VP8EmitTokens(const VP8TBuffer* const b, VP8BitWriter* const bw, - const uint8_t* const probas) { - VP8Tokens* p = b->rows_; - if (b->error_) return 0; - while (p != NULL) { - const int N = (p->next_ == NULL) ? b->left_ : 0; - int n = MAX_NUM_TOKEN; - while (n-- > N) { - VP8PutBit(bw, (p->tokens_[n] >> 15) & 1, probas[p->tokens_[n] & 0x7fff]); - } - p = p->next_; - } - return 1; -} - -#define TOKEN_ID(b, ctx, p) ((p) + NUM_PROBAS * ((ctx) + (b) * NUM_CTX)) - -static int RecordCoeffTokens(int ctx, const VP8Residual* const res, - VP8TBuffer* tokens) { - int n = res->first; - int b = VP8EncBands[n]; - if (!VP8AddToken(tokens, res->last >= 0, TOKEN_ID(b, ctx, 0))) { - return 0; - } - - while (n < 16) { - const int c = res->coeffs[n++]; - const int sign = c < 0; - int v = sign ? -c : c; - const int base_id = TOKEN_ID(b, ctx, 0); - if (!VP8AddToken(tokens, v != 0, base_id + 1)) { - b = VP8EncBands[n]; - ctx = 0; - continue; - } - if (!VP8AddToken(tokens, v > 1, base_id + 2)) { - b = VP8EncBands[n]; - ctx = 1; - } else { - if (!VP8AddToken(tokens, v > 4, base_id + 3)) { - if (VP8AddToken(tokens, v != 2, base_id + 4)) - VP8AddToken(tokens, v == 4, base_id + 5); - } else if (!VP8AddToken(tokens, v > 10, base_id + 6)) { - if (!VP8AddToken(tokens, v > 6, base_id + 7)) { -// VP8AddToken(tokens, v == 6, 159); - } else { -// VP8AddToken(tokens, v >= 9, 165); -// VP8AddToken(tokens, !(v & 1), 145); - } - } else { - int mask; - const uint8_t* tab; - if (v < 3 + (8 << 1)) { // kCat3 (3b) - VP8AddToken(tokens, 0, base_id + 8); - VP8AddToken(tokens, 0, base_id + 9); - v -= 3 + (8 << 0); - mask = 1 << 2; - tab = kCat3; - } else if (v < 3 + (8 << 2)) { // kCat4 (4b) - VP8AddToken(tokens, 0, base_id + 8); - VP8AddToken(tokens, 1, base_id + 9); - v -= 3 + (8 << 1); - mask = 1 << 3; - tab = kCat4; - } else if (v < 3 + (8 << 3)) { // kCat5 (5b) - VP8AddToken(tokens, 1, base_id + 8); - VP8AddToken(tokens, 0, base_id + 10); - v -= 3 + (8 << 2); - mask = 1 << 4; - tab = kCat5; - } else { // kCat6 (11b) - VP8AddToken(tokens, 1, base_id + 8); - VP8AddToken(tokens, 1, base_id + 10); - v -= 3 + (8 << 3); - mask = 1 << 10; - tab = kCat6; - } - while (mask) { - // VP8AddToken(tokens, !!(v & mask), *tab++); - mask >>= 1; - } - } - ctx = 2; - } - b = VP8EncBands[n]; - // VP8PutBitUniform(bw, sign); - if (n == 16 || !VP8AddToken(tokens, n <= res->last, TOKEN_ID(b, ctx, 0))) { - return 1; // EOB - } - } - return 1; -} +#if !defined(DISABLE_TOKEN_BUFFER) -static void RecordTokens(VP8EncIterator* const it, - const VP8ModeScore* const rd, VP8TBuffer tokens[2]) { +static void 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]; InitResidual(0, 1, enc, &res); SetResidualCoeffs(rd->y_dc_levels, &res); -// TODO(skal): FIX -> it->top_nz_[8] = it->left_nz_[8] = - RecordCoeffTokens(it->top_nz_[8] + it->left_nz_[8], &res, &tokens[0]); + it->top_nz_[8] = it->left_nz_[8] = + VP8RecordCoeffTokens(ctx, 1, + res.first, res.last, res.coeffs, tokens); + RecordCoeffs(ctx, &res); InitResidual(1, 0, enc, &res); } else { InitResidual(0, 3, enc, &res); @@ -645,7 +591,9 @@ static void RecordTokens(VP8EncIterator* const it, const int ctx = it->top_nz_[x] + it->left_nz_[y]; SetResidualCoeffs(rd->y_ac_levels[x + y * 4], &res); it->top_nz_[x] = it->left_nz_[y] = - RecordCoeffTokens(ctx, &res, &tokens[0]); + VP8RecordCoeffTokens(ctx, res.coeff_type, + res.first, res.last, res.coeffs, tokens); + RecordCoeffs(ctx, &res); } } @@ -657,13 +605,16 @@ static void RecordTokens(VP8EncIterator* const it, const int ctx = it->top_nz_[4 + ch + x] + it->left_nz_[4 + ch + y]; SetResidualCoeffs(rd->uv_levels[ch * 2 + x + y * 2], &res); it->top_nz_[4 + ch + x] = it->left_nz_[4 + ch + y] = - RecordCoeffTokens(ctx, &res, &tokens[1]); + VP8RecordCoeffTokens(ctx, 2, + res.first, res.last, res.coeffs, tokens); + RecordCoeffs(ctx, &res); } } } + VP8IteratorBytesToNz(it); } -#endif // USE_TOKEN_BUFFER +#endif // !DISABLE_TOKEN_BUFFER //------------------------------------------------------------------------------ // ExtraInfo map / Debug function @@ -679,7 +630,10 @@ static void SetBlock(uint8_t* p, int value, int size) { #endif static void ResetSSE(VP8Encoder* const enc) { - memset(enc->sse_, 0, sizeof(enc->sse_)); + enc->sse_[0] = 0; + enc->sse_[1] = 0; + enc->sse_[2] = 0; + // Note: enc->sse_[3] is managed by alpha.c enc->sse_count_ = 0; } @@ -718,6 +672,7 @@ static void StoreSideInfo(const VP8EncIterator* const it) { const int b = (int)((it->luma_bits_ + it->uv_bits_ + 7) >> 3); *info = (b > 255) ? 255 : b; break; } + case 7: *info = mb->alpha_; break; default: *info = 0; break; }; } @@ -729,99 +684,13 @@ static void StoreSideInfo(const VP8EncIterator* const it) { } //------------------------------------------------------------------------------ -// Main loops -// -// VP8EncLoop(): does the final bitstream coding. - -static void ResetAfterSkip(VP8EncIterator* const it) { - if (it->mb_->type_ == 1) { - *it->nz_ = 0; // reset all predictors - it->left_nz_[8] = 0; - } else { - *it->nz_ &= (1 << 24); // preserve the dc_nz bit - } -} - -int VP8EncLoop(VP8Encoder* const enc) { - int i, s, p; - int ok = 1; - VP8EncIterator it; - VP8ModeScore info; - const int dont_use_skip = !enc->proba_.use_skip_proba_; - const int rd_opt = enc->rd_opt_level_; - const int kAverageBytesPerMB = 5; // TODO: have a kTable[quality/10] - const int bytes_per_parts = - enc->mb_w_ * enc->mb_h_ * kAverageBytesPerMB / enc->num_parts_; - - // Initialize the bit-writers - for (p = 0; p < enc->num_parts_; ++p) { - VP8BitWriterInit(enc->parts_ + p, bytes_per_parts); - } - - ResetStats(enc, rd_opt != 0); - ResetSSE(enc); - - VP8IteratorInit(enc, &it); - VP8InitFilter(&it); - do { - VP8IteratorImport(&it); - // Warning! order is important: first call VP8Decimate() and - // *then* decide how to code the skip decision if there's one. - if (!VP8Decimate(&it, &info, rd_opt) || dont_use_skip) { - CodeResiduals(it.bw_, &it, &info); - } else { // reset predictors after a skip - ResetAfterSkip(&it); - } -#ifdef WEBP_EXPERIMENTAL_FEATURES - if (enc->use_layer_) { - VP8EncCodeLayerBlock(&it); - } -#endif - StoreSideInfo(&it); - VP8StoreFilterStats(&it); - VP8IteratorExport(&it); - ok = VP8IteratorProgress(&it, 20); - } while (ok && VP8IteratorNext(&it, it.yuv_out_)); - - if (ok) { // Finalize the partitions, check for extra errors. - for (p = 0; p < enc->num_parts_; ++p) { - VP8BitWriterFinish(enc->parts_ + p); - ok &= !enc->parts_[p].error_; - } - } - - if (ok) { // All good. Finish up. - if (enc->pic_->stats) { // finalize byte counters... - for (i = 0; i <= 2; ++i) { - for (s = 0; s < NUM_MB_SEGMENTS; ++s) { - enc->residual_bytes_[i][s] = (int)((it.bit_count_[s][i] + 7) >> 3); - } - } - } - VP8AdjustFilterStrength(&it); // ...and store filter stats. - } else { - // Something bad happened -> need to do some memory cleanup. - VP8EncFreeBitWriters(enc); - } - - return ok; -} - -//------------------------------------------------------------------------------ -// VP8StatLoop(): only collect statistics (number of skips, token usage, ...) -// This is used for deciding optimal probabilities. It also -// modifies the quantizer value if some target (size, PNSR) -// was specified. +// 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, PNSR) was specified. #define kHeaderSizeEstimate (15 + 20 + 10) // TODO: fix better -static int OneStatPass(VP8Encoder* const enc, float q, int rd_opt, int nb_mbs, - float* const PSNR, int percent_delta) { - VP8EncIterator it; - uint64_t size = 0; - uint64_t distortion = 0; - const uint64_t pixel_count = nb_mbs * 384; - +static void SetLoopParams(VP8Encoder* const enc, float q) { // Make sure the quality parameter is inside valid bounds if (q < 0.) { q = 0; @@ -830,10 +699,23 @@ static int OneStatPass(VP8Encoder* const enc, float q, int rd_opt, int nb_mbs, } VP8SetSegmentParams(enc, q); // setup segment quantizations and filters + SetSegmentProbas(enc); // compute segment probabilities - ResetStats(enc, rd_opt != 0); + ResetStats(enc); ResetTokenStats(enc); + ResetSSE(enc); +} + +static int OneStatPass(VP8Encoder* const enc, float q, VP8RDLevel rd_opt, + int nb_mbs, float* const PSNR, int percent_delta) { + VP8EncIterator it; + uint64_t size = 0; + uint64_t distortion = 0; + const uint64_t pixel_count = nb_mbs * 384; + + SetLoopParams(enc, q); + VP8IteratorInit(enc, &it); do { VP8ModeScore info; @@ -849,7 +731,7 @@ static int OneStatPass(VP8Encoder* const enc, float q, int rd_opt, int nb_mbs, return 0; } while (VP8IteratorNext(&it, it.yuv_out_) && --nb_mbs > 0); size += FinalizeSkipProba(enc); - size += FinalizeTokenProbas(enc); + size += FinalizeTokenProbas(&enc->proba_); size += enc->segment_hdr_.size_; size = ((size + 1024) >> 11) + kHeaderSizeEstimate; @@ -862,10 +744,10 @@ static int OneStatPass(VP8Encoder* const enc, float q, int rd_opt, int nb_mbs, // successive refinement increments. static const int dqs[] = { 20, 15, 10, 8, 6, 4, 2, 1, 0 }; -int VP8StatLoop(VP8Encoder* const enc) { - const int do_search = - (enc->config_->target_size > 0 || enc->config_->target_PSNR > 0); - const int fast_probe = (enc->method_ < 2 && !do_search); +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); float q = enc->config_->quality; const int max_passes = enc->config_->pass; const int task_percent = 20; @@ -876,12 +758,18 @@ int VP8StatLoop(VP8Encoder* const enc) { // Fast mode: quick analysis pass over few mbs. Better than nothing. nb_mbs = enc->mb_w_ * enc->mb_h_; - if (fast_probe && nb_mbs > 100) nb_mbs = 100; + 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; + } + } // No target size: just do several pass without changing 'q' if (!do_search) { for (pass = 0; pass < max_passes; ++pass) { - const int rd_opt = (enc->method_ > 2); + const VP8RDLevel rd_opt = (method >= 3) ? RD_OPT_BASIC : RD_OPT_NONE; if (!OneStatPass(enc, q, rd_opt, nb_mbs, NULL, percent_per_pass)) { return 0; } @@ -889,15 +777,14 @@ int VP8StatLoop(VP8Encoder* const enc) { } else { // binary search for a size close to target for (pass = 0; pass < max_passes && (dqs[pass] > 0); ++pass) { - const int rd_opt = 1; float PSNR; int criterion; - const int size = OneStatPass(enc, q, rd_opt, nb_mbs, &PSNR, + const int size = OneStatPass(enc, q, RD_OPT_BASIC, nb_mbs, &PSNR, percent_per_pass); #if DEBUG_SEARCH printf("#%d size=%d PSNR=%.2f q=%.2f\n", pass, size, PSNR, q); #endif - if (!size) return 0; + if (size == 0) return 0; if (enc->config_->target_PSNR > 0) { criterion = (PSNR < enc->config_->target_PSNR); } else { @@ -911,10 +798,179 @@ int VP8StatLoop(VP8Encoder* const enc) { } } } + 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 + 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) { // 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); + // Warning! order is important: first call VP8Decimate() and + // *then* decide how to code the skip decision if there's one. + if (!VP8Decimate(&it, &info, rd_opt) || dont_use_skip) { + CodeResiduals(it.bw_, &it, &info); + } else { // reset predictors after a skip + ResetAfterSkip(&it); + } +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (enc->use_layer_) { + VP8EncCodeLayerBlock(&it); + } +#endif + StoreSideInfo(&it); + VP8StoreFilterStats(&it); + VP8IteratorExport(&it); + ok = VP8IteratorProgress(&it, 20); + } while (ok && VP8IteratorNext(&it, it.yuv_out_)); + + 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) { + int ok; + // Roughly refresh the proba height times per pass + int max_count = (enc->mb_w_ * enc->mb_h_) >> 3; + int cnt; + VP8EncIterator it; + VP8Proba* const proba = &enc->proba_; + const VP8RDLevel rd_opt = enc->rd_opt_level_; + + if (max_count < MIN_COUNT) max_count = MIN_COUNT; + cnt = max_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(!enc->do_search_); // TODO(skal): handle pass and dichotomy + + SetLoopParams(enc, enc->config_->quality); + + ok = PreLoopInitialize(enc); + if (!ok) return 0; + + VP8IteratorInit(enc, &it); + VP8InitFilter(&it); + do { + VP8ModeScore info; + VP8IteratorImport(&it); + if (--cnt < 0) { + FinalizeTokenProbas(proba); + VP8CalculateLevelCosts(proba); // refresh cost tables for rd-opt + cnt = max_count; + } + VP8Decimate(&it, &info, rd_opt); + RecordTokens(&it, &info, &enc->tokens_); +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (enc->use_layer_) { + VP8EncCodeLayerBlock(&it); + } +#endif + StoreSideInfo(&it); + VP8StoreFilterStats(&it); + VP8IteratorExport(&it); + ok = VP8IteratorProgress(&it, 20); + } while (ok && VP8IteratorNext(&it, it.yuv_out_)); + + ok = ok && WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_); + + if (ok) { + FinalizeTokenProbas(proba); + ok = VP8EmitTokens(&enc->tokens_, enc->parts_ + 0, + (const uint8_t*)proba->coeffs_, 1); + } + + return PostLoopFinalize(&it, ok); +} + +#else + +int VP8EncTokenLoop(VP8Encoder* const enc) { + (void)enc; + return 0; // we shouldn't be here. +} + +#endif // DISABLE_TOKEN_BUFFER + +//------------------------------------------------------------------------------ #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" diff --git a/third_party/libwebp/enc/histogram.c b/third_party/libwebp/enc/histogram.c index ca838e0..69e5fa3 100644 --- a/third_party/libwebp/enc/histogram.c +++ b/third_party/libwebp/enc/histogram.c @@ -55,9 +55,9 @@ VP8LHistogramSet* VP8LAllocateHistogramSet(int size, int cache_bits) { int i; VP8LHistogramSet* set; VP8LHistogram* bulk; - const uint64_t total_size = (uint64_t)sizeof(*set) - + size * sizeof(*set->histograms) - + size * sizeof(**set->histograms); + const uint64_t total_size = sizeof(*set) + + (uint64_t)size * sizeof(*set->histograms) + + (uint64_t)size * sizeof(**set->histograms); uint8_t* memory = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*memory)); if (memory == NULL) return NULL; @@ -98,8 +98,6 @@ void VP8LHistogramAddSinglePixOrCopy(VP8LHistogram* const histo, } } - - static double BitsEntropy(const int* const array, int n) { double retval = 0.; int sum = 0; @@ -149,25 +147,6 @@ static double BitsEntropy(const int* const array, int n) { } } -double VP8LHistogramEstimateBitsBulk(const VP8LHistogram* const p) { - double retval = BitsEntropy(&p->literal_[0], VP8LHistogramNumCodes(p)) - + BitsEntropy(&p->red_[0], 256) - + BitsEntropy(&p->blue_[0], 256) - + BitsEntropy(&p->alpha_[0], 256) - + BitsEntropy(&p->distance_[0], NUM_DISTANCE_CODES); - // Compute the extra bits cost. - int i; - for (i = 2; i < NUM_LENGTH_CODES - 2; ++i) { - retval += - (i >> 1) * p->literal_[256 + i + 2]; - } - for (i = 2; i < NUM_DISTANCE_CODES - 2; ++i) { - retval += (i >> 1) * p->distance_[i + 2]; - } - return retval; -} - - // Returns the cost encode the rle-encoded entropy code. // The constants in this function are experimental. static double HuffmanCost(const int* const population, int length) { @@ -207,19 +186,150 @@ static double HuffmanCost(const int* const population, int length) { return retval; } -// Estimates the Huffman dictionary + other block overhead size. -static double HistogramEstimateBitsHeader(const VP8LHistogram* const p) { - return HuffmanCost(&p->alpha_[0], 256) + - HuffmanCost(&p->red_[0], 256) + - HuffmanCost(&p->literal_[0], VP8LHistogramNumCodes(p)) + - HuffmanCost(&p->blue_[0], 256) + - HuffmanCost(&p->distance_[0], NUM_DISTANCE_CODES); +static double PopulationCost(const int* const population, int length) { + return BitsEntropy(population, length) + HuffmanCost(population, length); +} + +static double ExtraCost(const int* const population, int length) { + int i; + double cost = 0.; + for (i = 2; i < length - 2; ++i) cost += (i >> 1) * population[i + 2]; + return cost; } +// Estimates the Entropy + Huffman + other block overhead size cost. double VP8LHistogramEstimateBits(const VP8LHistogram* const p) { - return HistogramEstimateBitsHeader(p) + VP8LHistogramEstimateBitsBulk(p); + return PopulationCost(p->literal_, VP8LHistogramNumCodes(p)) + + PopulationCost(p->red_, 256) + + PopulationCost(p->blue_, 256) + + PopulationCost(p->alpha_, 256) + + PopulationCost(p->distance_, NUM_DISTANCE_CODES) + + ExtraCost(p->literal_ + 256, NUM_LENGTH_CODES) + + ExtraCost(p->distance_, NUM_DISTANCE_CODES); +} + +double VP8LHistogramEstimateBitsBulk(const VP8LHistogram* const p) { + return BitsEntropy(p->literal_, VP8LHistogramNumCodes(p)) + + BitsEntropy(p->red_, 256) + + BitsEntropy(p->blue_, 256) + + BitsEntropy(p->alpha_, 256) + + BitsEntropy(p->distance_, NUM_DISTANCE_CODES) + + ExtraCost(p->literal_ + 256, NUM_LENGTH_CODES) + + ExtraCost(p->distance_, NUM_DISTANCE_CODES); +} + +// ----------------------------------------------------------------------------- +// Various histogram combine/cost-eval functions + +// Adds 'in' histogram to 'out' +static void HistogramAdd(const VP8LHistogram* const in, + VP8LHistogram* const out) { + int i; + for (i = 0; i < PIX_OR_COPY_CODES_MAX; ++i) { + out->literal_[i] += in->literal_[i]; + } + for (i = 0; i < NUM_DISTANCE_CODES; ++i) { + out->distance_[i] += in->distance_[i]; + } + for (i = 0; i < 256; ++i) { + out->red_[i] += in->red_[i]; + out->blue_[i] += in->blue_[i]; + out->alpha_[i] += in->alpha_[i]; + } +} + +// Performs out = a + b, computing the cost C(a+b) - C(a) - C(b) while comparing +// to the threshold value 'cost_threshold'. The score returned is +// Score = C(a+b) - C(a) - C(b), where C(a) + C(b) is known and fixed. +// Since the previous score passed is 'cost_threshold', we only need to compare +// the partial cost against 'cost_threshold + C(a) + C(b)' to possibly bail-out +// early. +static double HistogramAddEval(const VP8LHistogram* const a, + const VP8LHistogram* const b, + VP8LHistogram* const out, + double cost_threshold) { + double cost = 0; + const double sum_cost = a->bit_cost_ + b->bit_cost_; + int i; + + cost_threshold += sum_cost; + + // palette_code_bits_ is part of the cost evaluation for literal_. + // TODO(skal): remove/simplify this palette_code_bits_? + out->palette_code_bits_ = + (a->palette_code_bits_ > b->palette_code_bits_) ? a->palette_code_bits_ : + b->palette_code_bits_; + for (i = 0; i < PIX_OR_COPY_CODES_MAX; ++i) { + out->literal_[i] = a->literal_[i] + b->literal_[i]; + } + cost += PopulationCost(out->literal_, VP8LHistogramNumCodes(out)); + cost += ExtraCost(out->literal_ + 256, NUM_LENGTH_CODES); + if (cost > cost_threshold) return cost; + + for (i = 0; i < 256; ++i) out->red_[i] = a->red_[i] + b->red_[i]; + cost += PopulationCost(out->red_, 256); + if (cost > cost_threshold) return cost; + + for (i = 0; i < 256; ++i) out->blue_[i] = a->blue_[i] + b->blue_[i]; + cost += PopulationCost(out->blue_, 256); + if (cost > cost_threshold) return cost; + + for (i = 0; i < NUM_DISTANCE_CODES; ++i) { + out->distance_[i] = a->distance_[i] + b->distance_[i]; + } + cost += PopulationCost(out->distance_, NUM_DISTANCE_CODES); + cost += ExtraCost(out->distance_, NUM_DISTANCE_CODES); + if (cost > cost_threshold) return cost; + + for (i = 0; i < 256; ++i) out->alpha_[i] = a->alpha_[i] + b->alpha_[i]; + cost += PopulationCost(out->alpha_, 256); + + out->bit_cost_ = cost; + 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) { + int tmp[PIX_OR_COPY_CODES_MAX]; // <= max storage we'll need + int i; + double cost = -a->bit_cost_; + + for (i = 0; i < PIX_OR_COPY_CODES_MAX; ++i) { + tmp[i] = a->literal_[i] + b->literal_[i]; + } + // note that the tests are ordered so that the usually largest + // cost shares come first. + cost += PopulationCost(tmp, VP8LHistogramNumCodes(a)); + cost += ExtraCost(tmp + 256, NUM_LENGTH_CODES); + if (cost > cost_threshold) return cost; + + for (i = 0; i < 256; ++i) tmp[i] = a->red_[i] + b->red_[i]; + cost += PopulationCost(tmp, 256); + if (cost > cost_threshold) return cost; + + for (i = 0; i < 256; ++i) tmp[i] = a->blue_[i] + b->blue_[i]; + cost += PopulationCost(tmp, 256); + if (cost > cost_threshold) return cost; + + for (i = 0; i < NUM_DISTANCE_CODES; ++i) { + tmp[i] = a->distance_[i] + b->distance_[i]; + } + cost += PopulationCost(tmp, NUM_DISTANCE_CODES); + cost += ExtraCost(tmp, NUM_DISTANCE_CODES); + if (cost > cost_threshold) return cost; + + for (i = 0; i < 256; ++i) tmp[i] = a->alpha_[i] + b->alpha_[i]; + cost += PopulationCost(tmp, 256); + + return cost; +} + +// ----------------------------------------------------------------------------- + static void HistogramBuildImage(int xsize, int histo_bits, const VP8LBackwardRefs* const backward_refs, VP8LHistogramSet* const image) { @@ -249,14 +359,15 @@ static uint32_t MyRand(uint32_t *seed) { } static int HistogramCombine(const VP8LHistogramSet* const in, - VP8LHistogramSet* const out, int num_pairs) { + VP8LHistogramSet* const out, int iter_mult, + int num_pairs, int num_tries_no_success) { int ok = 0; int i, iter; uint32_t seed = 0; int tries_with_no_success = 0; - const int min_cluster_size = 2; int out_size = in->size; - const int outer_iters = in->size * 3; + const int outer_iters = in->size * iter_mult; + const int min_cluster_size = 2; VP8LHistogram* const histos = (VP8LHistogram*)malloc(2 * sizeof(*histos)); VP8LHistogram* cur_combo = histos + 0; // trial merged histogram VP8LHistogram* best_combo = histos + 1; // best merged histogram so far @@ -271,29 +382,26 @@ static int HistogramCombine(const VP8LHistogramSet* const in, // Collapse similar histograms in 'out'. for (iter = 0; iter < outer_iters && out_size >= min_cluster_size; ++iter) { - // We pick the best pair to be combined out of 'inner_iters' pairs. double best_cost_diff = 0.; - int best_idx1 = 0, best_idx2 = 1; + int best_idx1 = -1, best_idx2 = 1; int j; + const int num_tries = (num_pairs < out_size) ? num_pairs : out_size; seed += iter; - for (j = 0; j < num_pairs; ++j) { + for (j = 0; j < num_tries; ++j) { double curr_cost_diff; // Choose two histograms at random and try to combine them. const uint32_t idx1 = MyRand(&seed) % out_size; - const uint32_t tmp = ((j & 7) + 1) % (out_size - 1); + const uint32_t tmp = (j & 7) + 1; const uint32_t diff = (tmp < 3) ? tmp : MyRand(&seed) % (out_size - 1); const uint32_t idx2 = (idx1 + diff + 1) % out_size; if (idx1 == idx2) { continue; } - *cur_combo = *out->histograms[idx1]; - VP8LHistogramAdd(cur_combo, out->histograms[idx2]); - cur_combo->bit_cost_ = VP8LHistogramEstimateBits(cur_combo); // Calculate cost reduction on combining. - curr_cost_diff = cur_combo->bit_cost_ - - out->histograms[idx1]->bit_cost_ - - out->histograms[idx2]->bit_cost_; - if (best_cost_diff > curr_cost_diff) { // found a better pair? + curr_cost_diff = HistogramAddEval(out->histograms[idx1], + out->histograms[idx2], + cur_combo, best_cost_diff); + if (curr_cost_diff < best_cost_diff) { // found a better pair? { // swap cur/best combo histograms VP8LHistogram* const tmp_histo = cur_combo; cur_combo = best_combo; @@ -305,7 +413,7 @@ static int HistogramCombine(const VP8LHistogramSet* const in, } } - if (best_cost_diff < 0.0) { + if (best_idx1 >= 0) { *out->histograms[best_idx1] = *best_combo; // swap best_idx2 slot with last one (which is now unused) --out_size; @@ -315,7 +423,7 @@ static int HistogramCombine(const VP8LHistogramSet* const in, } tries_with_no_success = 0; } - if (++tries_with_no_success >= 50) { + if (++tries_with_no_success >= num_tries_no_success) { break; } } @@ -330,20 +438,11 @@ static int HistogramCombine(const VP8LHistogramSet* const in, // ----------------------------------------------------------------------------- // Histogram refinement -// What is the bit cost of moving square_histogram from -// cur_symbol to candidate_symbol. -// TODO(skal): we don't really need to copy the histogram and Add(). Instead -// we just need VP8LDualHistogramEstimateBits(A, B) estimation function. +// What is the bit cost of moving square_histogram from cur_symbol to candidate. static double HistogramDistance(const VP8LHistogram* const square_histogram, - const VP8LHistogram* const candidate) { - const double previous_bit_cost = candidate->bit_cost_; - double new_bit_cost; - VP8LHistogram modified_histo; - modified_histo = *candidate; - VP8LHistogramAdd(&modified_histo, square_histogram); - new_bit_cost = VP8LHistogramEstimateBits(&modified_histo); - - return new_bit_cost - previous_bit_cost; + const VP8LHistogram* const candidate, + double cost_threshold) { + return HistogramAddThresh(candidate, square_histogram, cost_threshold); } // Find the best 'out' histogram for each of the 'in' histograms. @@ -354,11 +453,12 @@ static void HistogramRemap(const VP8LHistogramSet* const in, int i; for (i = 0; i < in->size; ++i) { int best_out = 0; - double best_bits = HistogramDistance(in->histograms[i], out->histograms[0]); + double best_bits = + HistogramDistance(in->histograms[i], out->histograms[0], 1.e38); int k; for (k = 1; k < out->size; ++k) { const double cur_bits = - HistogramDistance(in->histograms[i], out->histograms[k]); + HistogramDistance(in->histograms[i], out->histograms[k], best_bits); if (cur_bits < best_bits) { best_bits = cur_bits; best_out = k; @@ -372,7 +472,7 @@ static void HistogramRemap(const VP8LHistogramSet* const in, HistogramClear(out->histograms[i]); } for (i = 0; i < in->size; ++i) { - VP8LHistogramAdd(out->histograms[symbols[i]], in->histograms[i]); + HistogramAdd(in->histograms[i], out->histograms[symbols[i]]); } } @@ -384,8 +484,13 @@ int VP8LGetHistoImageSymbols(int xsize, int ysize, int ok = 0; const int histo_xsize = histo_bits ? VP8LSubSampleSize(xsize, histo_bits) : 1; const int histo_ysize = histo_bits ? VP8LSubSampleSize(ysize, histo_bits) : 1; - const int num_histo_pairs = 10 + quality / 2; // For HistogramCombine(). const int histo_image_raw_size = histo_xsize * histo_ysize; + + // Heuristic params for HistogramCombine(). + const int num_tries_no_success = 8 + (quality >> 1); + const int iter_mult = (quality < 27) ? 1 : 1 + ((quality - 27) >> 4); + const int num_pairs = (quality < 25) ? 10 : (5 * quality) >> 3; + VP8LHistogramSet* const image_out = VP8LAllocateHistogramSet(histo_image_raw_size, cache_bits); if (image_out == NULL) return 0; @@ -393,7 +498,8 @@ int VP8LGetHistoImageSymbols(int xsize, int ysize, // Build histogram image. HistogramBuildImage(xsize, histo_bits, refs, image_out); // Collapse similar histograms. - if (!HistogramCombine(image_out, image_in, num_histo_pairs)) { + if (!HistogramCombine(image_out, image_in, iter_mult, num_pairs, + num_tries_no_success)) { goto Error; } // Find the optimal map from original histograms to the final ones. diff --git a/third_party/libwebp/enc/histogram.h b/third_party/libwebp/enc/histogram.h index ec573c5..fe7cea6 100644 --- a/third_party/libwebp/enc/histogram.h +++ b/third_party/libwebp/enc/histogram.h @@ -80,22 +80,6 @@ double VP8LHistogramEstimateBits(const VP8LHistogram* const p); // represent the entropy code itself. double VP8LHistogramEstimateBitsBulk(const VP8LHistogram* const p); -static WEBP_INLINE void VP8LHistogramAdd(VP8LHistogram* const p, - const VP8LHistogram* const a) { - int i; - for (i = 0; i < PIX_OR_COPY_CODES_MAX; ++i) { - p->literal_[i] += a->literal_[i]; - } - for (i = 0; i < NUM_DISTANCE_CODES; ++i) { - p->distance_[i] += a->distance_[i]; - } - for (i = 0; i < 256; ++i) { - p->red_[i] += a->red_[i]; - p->blue_[i] += a->blue_[i]; - p->alpha_[i] += a->alpha_[i]; - } -} - static WEBP_INLINE int VP8LHistogramNumCodes(const VP8LHistogram* const p) { return 256 + NUM_LENGTH_CODES + ((p->palette_code_bits_ > 0) ? (1 << p->palette_code_bits_) : 0); diff --git a/third_party/libwebp/enc/picture.c b/third_party/libwebp/enc/picture.c index 44eed06..739a7aa 100644 --- a/third_party/libwebp/enc/picture.c +++ b/third_party/libwebp/enc/picture.c @@ -290,8 +290,11 @@ int WebPPictureView(const WebPPicture* src, 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; } #ifdef WEBP_EXPERIMENTAL_FEATURES if (src->u0 != NULL) { @@ -299,10 +302,12 @@ int WebPPictureView(const WebPPicture* src, IS_YUV_CSP(dst->colorspace, WEBP_YUV422) ? (left >> 1) : left; dst->u0 = src->u0 + top * src->uv0_stride + left_pos; dst->v0 = src->v0 + top * src->uv0_stride + left_pos; + dst->uv0_stride = src->uv0_stride; } #endif } else { dst->argb = src->argb + top * src->argb_stride + left; + dst->argb_stride = src->argb_stride; } return 1; } @@ -801,11 +806,11 @@ int WebPPictureYUVAToARGB(WebPPicture* picture) { // Insert alpha values if needed, in replacement for the default 0xff ones. if (picture->colorspace & WEBP_CSP_ALPHA_BIT) { for (y = 0; y < height; ++y) { - uint32_t* const dst = picture->argb + y * picture->argb_stride; + 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) { - dst[x] = (dst[x] & 0x00ffffffu) | (src[x] << 24); + argb_dst[x] = (argb_dst[x] & 0x00ffffffu) | (src[x] << 24); } } } @@ -906,67 +911,135 @@ void WebPCleanupTransparentArea(WebPPicture* pic) { #undef SIZE #undef SIZE2 +//------------------------------------------------------------------------------ +// 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. + +// search radius. Shouldn't be too large. +#define RADIUS 2 + +static float AccumulateLSIM(const uint8_t* src, int src_stride, + const uint8_t* ref, int ref_stride, + int w, int h) { + 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* s = src + j * src_stride; + for (i = x_0; i < x_1; ++i) { + const double sse = (double)(s[i] - value) * (s[i] - value); + if (sse < best_sse) best_sse = sse; + } + } + total_sse += best_sse; + } + } + return (float)total_sse; +} +#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* pic1, const WebPPicture* pic2, +int WebPPictureDistortion(const WebPPicture* src, const WebPPicture* ref, int type, float result[5]) { - int c; DistoStats stats[5]; int has_alpha; + int uv_w, uv_h; - if (pic1 == NULL || pic2 == NULL || - pic1->width != pic2->width || pic1->height != pic2->height || - pic1->y == NULL || pic2->y == NULL || - pic1->u == NULL || pic2->u == NULL || - pic1->v == NULL || pic2->v == NULL || + if (src == NULL || ref == NULL || + src->width != ref->width || src->height != ref->height || + src->y == NULL || ref->y == NULL || + src->u == NULL || ref->u == NULL || + src->v == NULL || ref->v == NULL || result == NULL) { return 0; } // TODO(skal): provide distortion for ARGB too. - if (pic1->use_argb == 1 || pic1->use_argb != pic2->use_argb) { + if (src->use_argb == 1 || src->use_argb != ref->use_argb) { return 0; } - has_alpha = !!(pic1->colorspace & WEBP_CSP_ALPHA_BIT); - if (has_alpha != !!(pic2->colorspace & WEBP_CSP_ALPHA_BIT) || - (has_alpha && (pic1->a == NULL || pic2->a == NULL))) { + 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; } memset(stats, 0, sizeof(stats)); - VP8SSIMAccumulatePlane(pic1->y, pic1->y_stride, - pic2->y, pic2->y_stride, - pic1->width, pic1->height, &stats[0]); - VP8SSIMAccumulatePlane(pic1->u, pic1->uv_stride, - pic2->u, pic2->uv_stride, - (pic1->width + 1) >> 1, (pic1->height + 1) >> 1, - &stats[1]); - VP8SSIMAccumulatePlane(pic1->v, pic1->uv_stride, - pic2->v, pic2->uv_stride, - (pic1->width + 1) >> 1, (pic1->height + 1) >> 1, - &stats[2]); - if (has_alpha) { - VP8SSIMAccumulatePlane(pic1->a, pic1->a_stride, - pic2->a, pic2->a_stride, - pic1->width, pic1->height, &stats[3]); - } - for (c = 0; c <= 4; ++c) { - if (type == 1) { - const double v = VP8SSIMGet(&stats[c]); - result[c] = (float)((v < 1.) ? -10.0 * log10(1. - v) - : kMinDistortion_dB); - } else { - const double v = VP8SSIMGetSquaredError(&stats[c]); - result[c] = (float)((v > 0.) ? -4.3429448 * log(v / (255 * 255.)) - : kMinDistortion_dB); + + uv_w = HALVE(src->width); + uv_h = HALVE(src->height); + if (type >= 2) { + float sse[4]; + sse[0] = AccumulateLSIM(src->y, src->y_stride, + ref->y, ref->y_stride, src->width, src->height); + sse[1] = AccumulateLSIM(src->u, src->uv_stride, + ref->u, ref->uv_stride, uv_w, uv_h); + sse[2] = AccumulateLSIM(src->v, src->uv_stride, + ref->v, ref->uv_stride, uv_w, uv_h); + sse[3] = has_alpha ? AccumulateLSIM(src->a, src->a_stride, + ref->a, ref->a_stride, + src->width, src->height) + : 0.f; + result[0] = GetPSNR(sse[0] / (src->width * src->height)); + result[1] = GetPSNR(sse[1] / (uv_w * uv_h)); + result[2] = GetPSNR(sse[2] / (uv_w * uv_h)); + result[3] = GetPSNR(sse[3] / (src->width * src->height)); + { + double total_sse = sse[0] + sse[1] + sse[2]; + int total_pixels = src->width * src->height + 2 * uv_w * uv_h; + if (has_alpha) { + total_pixels += src->width * src->height; + total_sse += sse[3]; + } + result[4] = GetPSNR(total_sse / total_pixels); + } + } else { + int c; + VP8SSIMAccumulatePlane(src->y, src->y_stride, + ref->y, ref->y_stride, + src->width, src->height, &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, + src->width, src->height, &stats[3]); + } + for (c = 0; c <= 4; ++c) { + if (type == 1) { + const double v = VP8SSIMGet(&stats[c]); + result[c] = (float)((v < 1.) ? -10.0 * log10(1. - v) + : kMinDistortion_dB); + } else { + const double v = VP8SSIMGetSquaredError(&stats[c]); + result[c] = GetPSNR(v); + } + // Accumulate forward + if (c < 4) VP8SSIMAddStats(&stats[c], &stats[4]); } - // Accumulate forward - if (c < 4) VP8SSIMAddStats(&stats[c], &stats[4]); } return 1; } diff --git a/third_party/libwebp/enc/quant.c b/third_party/libwebp/enc/quant.c index ea15384..dcfd4d16 100644 --- a/third_party/libwebp/enc/quant.c +++ b/third_party/libwebp/enc/quant.c @@ -27,6 +27,8 @@ #define SNS_TO_DQ 0.9 // Scaling constant between the sns value and the QP // power-law modulation. Must be strictly less than 1. +#define I4_PENALTY 4000 // Rate-penalty for quick i4/i16 decision + #define MULT_8B(a, b) (((a) * (b) + 128) >> 8) #if defined(__cplusplus) || defined(c_plusplus) @@ -224,28 +226,90 @@ static void SetupFilterStrength(VP8Encoder* const enc) { // We want to emulate jpeg-like behaviour where the expected "good" quality // is around q=75. Internally, our "good" middle is around c=50. So we // map accordingly using linear piece-wise function -static double QualityToCompression(double q) { - const double c = q / 100.; - return (c < 0.75) ? c * (2. / 3.) : 2. * c - 1.; +static double QualityToCompression(double c) { + const double linear_c = (c < 0.75) ? c * (2. / 3.) : 2. * c - 1.; + // The file size roughly scales as pow(quantizer, 3.). Actually, the + // exponent is somewhere between 2.8 and 3.2, but we're mostly interested + // in the mid-quant range. So we scale the compressibility inversely to + // this power-law: quant ~= compression ^ 1/3. This law holds well for + // low quant. Finer modelling for high-quant would make use of kAcTable[] + // more explicitly. + const double v = pow(linear_c, 1 / 3.); + return v; +} + +static double QualityToJPEGCompression(double c, double alpha) { + // We map the complexity 'alpha' and quality setting 'c' to a compression + // exponent empirically matched to the compression curve of libjpeg6b. + // On average, the WebP output size will be roughly similar to that of a + // JPEG file compressed with same quality factor. + const double amin = 0.30; + const double amax = 0.85; + const double exp_min = 0.4; + const double exp_max = 0.9; + const double slope = (exp_min - exp_max) / (amax - amin); + // Linearly interpolate 'expn' from exp_min to exp_max + // in the [amin, amax] range. + const double expn = (alpha > amax) ? exp_min + : (alpha < amin) ? exp_max + : exp_max + slope * (alpha - amin); + const double v = pow(c, expn); + return v; +} + +static int SegmentsAreEquivalent(const VP8SegmentInfo* const S1, + const VP8SegmentInfo* const S2) { + return (S1->quant_ == S2->quant_) && (S1->fstrength_ == S2->fstrength_); +} + +static void SimplifySegments(VP8Encoder* const enc) { + int map[NUM_MB_SEGMENTS] = { 0, 1, 2, 3 }; + const int num_segments = enc->segment_hdr_.num_segments_; + int num_final_segments = 1; + int s1, s2; + for (s1 = 1; s1 < num_segments; ++s1) { // find similar segments + const VP8SegmentInfo* const S1 = &enc->dqm_[s1]; + int found = 0; + // check if we already have similar segment + for (s2 = 0; s2 < num_final_segments; ++s2) { + const VP8SegmentInfo* const S2 = &enc->dqm_[s2]; + if (SegmentsAreEquivalent(S1, S2)) { + found = 1; + break; + } + } + map[s1] = s2; + if (!found) { + if (num_final_segments != s1) { + enc->dqm_[num_final_segments] = enc->dqm_[s1]; + } + ++num_final_segments; + } + } + if (num_final_segments < num_segments) { // Remap + int i = enc->mb_w_ * enc->mb_h_; + while (i-- > 0) enc->mb_info_[i].segment_ = map[enc->mb_info_[i].segment_]; + enc->segment_hdr_.num_segments_ = num_final_segments; + // Replicate the trailing segment infos (it's mostly cosmetics) + for (i = num_final_segments; i < num_segments; ++i) { + enc->dqm_[i] = enc->dqm_[num_final_segments - 1]; + } + } } void VP8SetSegmentParams(VP8Encoder* const enc, float quality) { int i; int dq_uv_ac, dq_uv_dc; - const int num_segments = enc->config_->segments; + const int num_segments = enc->segment_hdr_.num_segments_; const double amp = SNS_TO_DQ * enc->config_->sns_strength / 100. / 128.; - const double c_base = QualityToCompression(quality); + const double Q = quality / 100.; + const double c_base = enc->config_->emulate_jpeg_size ? + QualityToJPEGCompression(Q, enc->alpha_ / 255.) : + QualityToCompression(Q); for (i = 0; i < num_segments; ++i) { - // The file size roughly scales as pow(quantizer, 3.). Actually, the - // exponent is somewhere between 2.8 and 3.2, but we're mostly interested - // in the mid-quant range. So we scale the compressibility inversely to - // this power-law: quant ~= compression ^ 1/3. This law holds well for - // low quant. Finer modelling for high-quant would make use of kAcTable[] - // more explicitely. - // Additionally, we modulate the base exponent 1/3 to accommodate for the - // quantization susceptibility and allow denser segments to be quantized - // more. - const double expn = (1. - amp * enc->dqm_[i].alpha_) / 3.; + // We modulate the base coefficient to accommodate for the quantization + // susceptibility and allow denser segments to be quantized more. + const double expn = 1. - amp * enc->dqm_[i].alpha_; const double c = pow(c_base, expn); const int q = (int)(127. * (1. - c)); assert(expn > 0.); @@ -281,9 +345,11 @@ void VP8SetSegmentParams(VP8Encoder* const enc, float quality) { enc->dq_uv_dc_ = dq_uv_dc; enc->dq_uv_ac_ = dq_uv_ac; - SetupMatrices(enc); - SetupFilterStrength(enc); // initialize segments' filtering, eventually + + if (num_segments > 1) SimplifySegments(enc); + + SetupMatrices(enc); // finalize quantization matrices } //------------------------------------------------------------------------------ @@ -709,7 +775,7 @@ static void PickBestIntra16(VP8EncIterator* const it, VP8ModeScore* const rd) { int mode; rd->mode_i16 = -1; - for (mode = 0; mode < 4; ++mode) { + for (mode = 0; mode < NUM_PRED_MODES; ++mode) { uint8_t* const tmp_dst = it->yuv_out2_ + Y_OFF; // scratch buffer int nz; @@ -838,7 +904,7 @@ static void PickBestUV(VP8EncIterator* const it, VP8ModeScore* const rd) { rd->mode_uv = -1; InitScore(&rd_best); - for (mode = 0; mode < 4; ++mode) { + for (mode = 0; mode < NUM_PRED_MODES; ++mode) { VP8ModeScore rd_uv; // Reconstruct @@ -867,10 +933,10 @@ static void PickBestUV(VP8EncIterator* const it, VP8ModeScore* const rd) { static void SimpleQuantize(VP8EncIterator* const it, VP8ModeScore* const rd) { const VP8Encoder* const enc = it->enc_; - const int i16 = (it->mb_->type_ == 1); + const int is_i16 = (it->mb_->type_ == 1); int nz = 0; - if (i16) { + if (is_i16) { nz = ReconstructIntra16(it, rd, it->yuv_out_ + Y_OFF, it->preds_[0]); } else { VP8IteratorStartI4(it); @@ -889,11 +955,66 @@ static void SimpleQuantize(VP8EncIterator* const it, VP8ModeScore* const rd) { rd->nz = nz; } +// Refine intra16/intra4 sub-modes based on distortion only (not rate). +static void DistoRefine(VP8EncIterator* const it, int try_both_i4_i16) { + const int is_i16 = (it->mb_->type_ == 1); + score_t best_score = MAX_COST; + + if (try_both_i4_i16 || is_i16) { + int mode; + int best_mode = -1; + for (mode = 0; mode < NUM_PRED_MODES; ++mode) { + const uint8_t* const ref = it->yuv_p_ + VP8I16ModeOffsets[mode]; + const uint8_t* const src = it->yuv_in_ + Y_OFF; + const score_t score = VP8SSE16x16(src, ref); + if (score < best_score) { + best_mode = mode; + best_score = score; + } + } + VP8SetIntra16Mode(it, best_mode); + } + if (try_both_i4_i16 || !is_i16) { + uint8_t modes_i4[16]; + // We don't evaluate the rate here, but just account for it through a + // constant penalty (i4 mode usually needs more bits compared to i16). + score_t score_i4 = (score_t)I4_PENALTY; + + VP8IteratorStartI4(it); + do { + int mode; + int best_sub_mode = -1; + score_t best_sub_score = MAX_COST; + const uint8_t* const src = it->yuv_in_ + Y_OFF + VP8Scan[it->i4_]; + + // TODO(skal): we don't really need the prediction pixels here, + // but just the distortion against 'src'. + VP8MakeIntra4Preds(it); + for (mode = 0; mode < NUM_BMODES; ++mode) { + const uint8_t* const ref = it->yuv_p_ + VP8I4ModeOffsets[mode]; + const score_t score = VP8SSE4x4(src, ref); + if (score < best_sub_score) { + best_sub_mode = mode; + best_sub_score = score; + } + } + modes_i4[it->i4_] = best_sub_mode; + score_i4 += best_sub_score; + if (score_i4 >= best_score) break; + } while (VP8IteratorRotateI4(it, it->yuv_in_ + Y_OFF)); + if (score_i4 < best_score) { + VP8SetIntra4Mode(it, modes_i4); + } + } +} + //------------------------------------------------------------------------------ // Entry point -int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt) { +int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, + VP8RDLevel rd_opt) { int is_skipped; + const int method = it->enc_->method_; InitScore(rd); @@ -902,22 +1023,21 @@ int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt) { VP8MakeLuma16Preds(it); VP8MakeChroma8Preds(it); - // for rd_opt = 2, we perform trellis-quant on the final decision only. - // for rd_opt > 2, we use it for every scoring (=much slower). - if (rd_opt > 0) { - it->do_trellis_ = (rd_opt > 2); + if (rd_opt > RD_OPT_NONE) { + it->do_trellis_ = (rd_opt >= RD_OPT_TRELLIS_ALL); PickBestIntra16(it, rd); - if (it->enc_->method_ >= 2) { + if (method >= 2) { PickBestIntra4(it, rd); } PickBestUV(it, rd); - if (rd_opt == 2) { + if (rd_opt == RD_OPT_TRELLIS) { // finish off with trellis-optim now it->do_trellis_ = 1; SimpleQuantize(it, rd); } } else { - // TODO: for method_ == 2, pick the best intra4/intra16 based on SSE - it->do_trellis_ = (it->enc_->method_ == 2); + // For method == 2, pick the best intra4/intra16 based on SSE (~tad slower). + // For method <= 1, we refine intra4 or intra16 (but don't re-examine mode). + DistoRefine(it, (method >= 2)); SimpleQuantize(it, rd); } is_skipped = (rd->nz == 0); diff --git a/third_party/libwebp/enc/syntax.c b/third_party/libwebp/enc/syntax.c index 7c8c7b1..24e008c 100644 --- a/third_party/libwebp/enc/syntax.c +++ b/third_party/libwebp/enc/syntax.c @@ -11,7 +11,9 @@ #include <assert.h> -#include "../webp/format_constants.h" +#include "../utils/utils.h" +#include "../webp/format_constants.h" // RIFF constants +#include "../webp/mux_types.h" // ALPHA_FLAG #include "./vp8enci.h" #if defined(__cplusplus) || defined(c_plusplus) @@ -21,18 +23,6 @@ extern "C" { //------------------------------------------------------------------------------ // Helper functions -// TODO(later): Move to webp/format_constants.h? -static void PutLE24(uint8_t* const data, uint32_t val) { - data[0] = (val >> 0) & 0xff; - data[1] = (val >> 8) & 0xff; - data[2] = (val >> 16) & 0xff; -} - -static void PutLE32(uint8_t* const data, uint32_t val) { - PutLE24(data, val); - data[3] = (val >> 24) & 0xff; -} - static int IsVP8XNeeded(const VP8Encoder* const enc) { return !!enc->has_alpha_; // Currently the only case when VP8X is needed. // This could change in the future. @@ -73,7 +63,7 @@ static WebPEncodingError PutVP8XHeader(const VP8Encoder* const enc) { assert(pic->width <= MAX_CANVAS_SIZE && pic->height <= MAX_CANVAS_SIZE); if (enc->has_alpha_) { - flags |= ALPHA_FLAG_BIT; + flags |= ALPHA_FLAG; } PutLE32(vp8x + TAG_SIZE, VP8X_CHUNK_SIZE); @@ -327,7 +317,9 @@ static size_t GeneratePartition0(VP8Encoder* const enc) { PutSegmentHeader(bw, enc); PutFilterHeader(bw, &enc->filter_hdr_); - VP8PutValue(bw, enc->config_->partitions, 2); + VP8PutValue(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_); diff --git a/third_party/libwebp/enc/token.c b/third_party/libwebp/enc/token.c new file mode 100644 index 0000000..4e2f6c0 --- /dev/null +++ b/third_party/libwebp/enc/token.c @@ -0,0 +1,254 @@ +// 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/ +// ----------------------------------------------------------------------------- +// +// 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 "./vp8enci.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if !defined(DISABLE_TOKEN_BUFFER) + +// we use pages to reduce the number of memcpy() +#define MAX_NUM_TOKEN 8192 // max number of token per page +#define FIXED_PROBA_BIT (1u << 14) + +struct VP8Tokens { + uint16_t tokens_[MAX_NUM_TOKEN]; // bit#15: bit + // bit #14: constant proba or idx + // bits 0..13: slot or constant proba + VP8Tokens* next_; +}; + +//------------------------------------------------------------------------------ + +void VP8TBufferInit(VP8TBuffer* const b) { + b->tokens_ = NULL; + b->pages_ = NULL; + b->last_page_ = &b->pages_; + b->left_ = 0; + b->error_ = 0; +} + +void VP8TBufferClear(VP8TBuffer* const b) { + if (b != NULL) { + const VP8Tokens* p = b->pages_; + while (p != NULL) { + const VP8Tokens* const next = p->next_; + free((void*)p); + p = next; + } + VP8TBufferInit(b); + } +} + +static int TBufferNewPage(VP8TBuffer* const b) { + VP8Tokens* const page = b->error_ ? NULL : (VP8Tokens*)malloc(sizeof(*page)); + if (page == NULL) { + b->error_ = 1; + return 0; + } + *b->last_page_ = page; + b->last_page_ = &page->next_; + b->left_ = MAX_NUM_TOKEN; + b->tokens_ = page->tokens_; + page->next_ = NULL; + return 1; +} + +//------------------------------------------------------------------------------ + +#define TOKEN_ID(t, b, ctx, p) \ + ((p) + NUM_PROBAS * ((ctx) + NUM_CTX * ((b) + NUM_BANDS * (t)))) + +static WEBP_INLINE int AddToken(VP8TBuffer* const b, + int bit, uint32_t proba_idx) { + assert(proba_idx < FIXED_PROBA_BIT); + assert(bit == 0 || 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, + int bit, int proba) { + assert(proba < 256); + assert(bit == 0 || bit == 1); + if (b->left_ > 0 || TBufferNewPage(b)) { + const int slot = --b->left_; + b->tokens_[slot] = (bit << 15) | FIXED_PROBA_BIT | proba; + } +} + +int VP8RecordCoeffTokens(int ctx, 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, 0); + if (!AddToken(tokens, last >= 0, base_id + 0)) { + return 0; + } + + while (n < 16) { + const int c = coeffs[n++]; + const int sign = c < 0; + int v = sign ? -c : c; + if (!AddToken(tokens, v != 0, base_id + 1)) { + ctx = 0; + base_id = TOKEN_ID(coeff_type, VP8EncBands[n], ctx, 0); + continue; + } + if (!AddToken(tokens, v > 1, base_id + 2)) { + 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; + if (v < 3 + (8 << 1)) { // VP8Cat3 (3b) + AddToken(tokens, 0, base_id + 8); + AddToken(tokens, 0, base_id + 9); + v -= 3 + (8 << 0); + mask = 1 << 2; + tab = VP8Cat3; + } else if (v < 3 + (8 << 2)) { // VP8Cat4 (4b) + AddToken(tokens, 0, base_id + 8); + AddToken(tokens, 1, base_id + 9); + v -= 3 + (8 << 1); + mask = 1 << 3; + tab = VP8Cat4; + } else if (v < 3 + (8 << 3)) { // VP8Cat5 (5b) + AddToken(tokens, 1, base_id + 8); + AddToken(tokens, 0, base_id + 10); + v -= 3 + (8 << 2); + mask = 1 << 4; + tab = VP8Cat5; + } else { // VP8Cat6 (11b) + AddToken(tokens, 1, base_id + 8); + AddToken(tokens, 1, base_id + 10); + v -= 3 + (8 << 3); + mask = 1 << 10; + tab = VP8Cat6; + } + while (mask) { + AddConstantToken(tokens, !!(v & mask), *tab++); + mask >>= 1; + } + } + ctx = 2; + } + AddConstantToken(tokens, sign, 128); + base_id = TOKEN_ID(coeff_type, VP8EncBands[n], ctx, 0); + 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; + while (n-- > N) { + const uint16_t token = p->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_; + (void)final_pass; + if (b->error_) return 0; + while (p != NULL) { + const VP8Tokens* const next = p->next_; + const int N = (next == NULL) ? b->left_ : 0; + int n = MAX_NUM_TOKEN; + while (n-- > N) { + const uint16_t token = p->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) free((void*)p); + p = next; + } + if (final_pass) b->pages_ = NULL; + return 1; +} + +//------------------------------------------------------------------------------ + +#else // DISABLE_TOKEN_BUFFER + +void VP8TBufferInit(VP8TBuffer* const b) { + (void)b; +} +void VP8TBufferClear(VP8TBuffer* const b) { + (void)b; +} + +#endif // !DISABLE_TOKEN_BUFFER + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/third_party/libwebp/enc/tree.c b/third_party/libwebp/enc/tree.c index 06c1d57..8b25e5e 100644 --- a/third_party/libwebp/enc/tree.c +++ b/third_party/libwebp/enc/tree.c @@ -158,9 +158,12 @@ const uint8_t void VP8DefaultProbas(VP8Encoder* const enc) { VP8Proba* const probas = &enc->proba_; + probas->use_skip_proba_ = 0; memset(probas->segments_, 255u, sizeof(probas->segments_)); memcpy(probas->coeffs_, VP8CoeffsProba0, sizeof(VP8CoeffsProba0)); - probas->use_skip_proba_ = 0; + // 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. diff --git a/third_party/libwebp/enc/vp8enci.h b/third_party/libwebp/enc/vp8enci.h index 37004a5..6164703 100644 --- a/third_party/libwebp/enc/vp8enci.h +++ b/third_party/libwebp/enc/vp8enci.h @@ -16,6 +16,7 @@ #include "../webp/encode.h" #include "../dsp/dsp.h" #include "../utils/bit_writer.h" +#include "../utils/thread.h" #if defined(__cplusplus) || defined(c_plusplus) extern "C" { @@ -26,12 +27,9 @@ extern "C" { // version numbers #define ENC_MAJ_VERSION 0 -#define ENC_MIN_VERSION 2 +#define ENC_MIN_VERSION 3 #define ENC_REV_VERSION 0 -// size of histogram used by CollectHistogram. -#define MAX_COEFF_THRESH 64 - // intra prediction modes enum { B_DC_PRED = 0, // 4x4 modes B_TM_PRED = 1, @@ -47,7 +45,8 @@ enum { B_DC_PRED = 0, // 4x4 modes // Luma16 or UV modes DC_PRED = B_DC_PRED, V_PRED = B_VE_PRED, - H_PRED = B_HE_PRED, TM_PRED = B_TM_PRED + H_PRED = B_HE_PRED, TM_PRED = B_TM_PRED, + NUM_PRED_MODES = 4 }; enum { NUM_MB_SEGMENTS = 4, @@ -60,6 +59,13 @@ enum { NUM_MB_SEGMENTS = 4, MAX_VARIABLE_LEVEL = 67 // last (inclusive) level with variable cost }; +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 16-pixels wide. // The original or reconstructed samples can be accessed using VP8Scan[] // The predicted blocks can be accessed using offsets to yuv_p_ and @@ -160,13 +166,24 @@ typedef int64_t score_t; // type used for scores, rate, distortion static WEBP_INLINE int QUANTDIV(int n, int iQ, int B) { return (n * iQ + B) >> QFIX; } -extern const uint8_t VP8Zigzag[16]; + +// size of histogram used by CollectHistogram. +#define MAX_COEFF_THRESH 31 +typedef struct VP8Histogram VP8Histogram; +struct VP8Histogram { + // TODO(skal): we only need to store the max_value and last_non_zero actually. + int distribution[MAX_COEFF_THRESH + 1]; +}; + +// 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 uint64_t StatsArray[NUM_CTX][NUM_PROBAS][2]; +typedef proba_t StatsArray[NUM_CTX][NUM_PROBAS]; typedef uint16_t CostArray[NUM_CTX][MAX_VARIABLE_LEVEL + 1]; typedef double LFStats[NUM_MB_SEGMENTS][MAX_LF_LEVELS]; // filter stats @@ -185,8 +202,9 @@ typedef struct { uint8_t segments_[3]; // probabilities for segment tree uint8_t skip_proba_; // final probability of being skipped. ProbaArray coeffs_[NUM_TYPES][NUM_BANDS]; // 924 bytes - StatsArray stats_[NUM_TYPES][NUM_BANDS]; // 7.4k + StatsArray stats_[NUM_TYPES][NUM_BANDS]; // 4224 bytes CostArray level_cost_[NUM_TYPES][NUM_BANDS]; // 11.4k + int dirty_; // if true, need to call VP8CalculateLevelCosts() int use_skip_proba_; // Note: we always use skip_proba for now. int nb_skip_; // number of skipped blocks } VP8Proba; @@ -312,44 +330,37 @@ void VP8SetSegment(const VP8EncIterator* const it, int segment); //------------------------------------------------------------------------------ // Paginated token buffer -// WIP: #define USE_TOKEN_BUFFER - -#ifdef USE_TOKEN_BUFFER - -#define MAX_NUM_TOKEN 2048 - -typedef struct VP8Tokens VP8Tokens; -struct VP8Tokens { - uint16_t tokens_[MAX_NUM_TOKEN]; // bit#15: bit, bits 0..14: slot - int left_; - VP8Tokens* next_; -}; +typedef struct VP8Tokens VP8Tokens; // struct details in token.c typedef struct { - VP8Tokens* rows_; - uint16_t* tokens_; // set to (*last_)->tokens_ - VP8Tokens** last_; - int left_; - int error_; // true in case of malloc error +#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. +#endif + int error_; // true in case of malloc error } VP8TBuffer; void VP8TBufferInit(VP8TBuffer* const b); // initialize an empty buffer -int VP8TBufferNewPage(VP8TBuffer* const b); // allocate a new page -void VP8TBufferClear(VP8TBuffer* const b); // de-allocate memory - -int VP8EmitTokens(const VP8TBuffer* const b, VP8BitWriter* const bw, - const uint8_t* const probas); - -static WEBP_INLINE int VP8AddToken(VP8TBuffer* const b, - int bit, int proba_idx) { - if (b->left_ > 0 || VP8TBufferNewPage(b)) { - const int slot = --b->left_; - b->tokens_[slot] = (bit << 15) | proba_idx; - } - return bit; -} +void VP8TBufferClear(VP8TBuffer* const b); // de-allocate pages memory + +#if !defined(DISABLE_TOKEN_BUFFER) -#endif // USE_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(int ctx, int coeff_type, int first, int last, + const int16_t* const coeffs, + VP8TBuffer* const tokens); + +// unused for now +void VP8TokenToStats(const VP8TBuffer* const b, proba_t* const stats); + +#endif // !DISABLE_TOKEN_BUFFER //------------------------------------------------------------------------------ // VP8Encoder @@ -374,6 +385,7 @@ struct VP8Encoder { // per-partition boolean decoders. VP8BitWriter bw_; // part0 VP8BitWriter parts_[MAX_NUM_PARTITIONS]; // token partitions + VP8TBuffer tokens_; // token buffer int percent_; // for progress @@ -381,6 +393,7 @@ struct VP8Encoder { int has_alpha_; uint8_t* alpha_data_; // non-NULL if transparency is present uint32_t alpha_data_size_; + WebPWorker alpha_worker_; // enhancement layer int use_layer_; @@ -392,6 +405,7 @@ struct VP8Encoder { 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_; @@ -407,9 +421,12 @@ struct VP8Encoder { int block_count_[3]; // quality/speed settings - int method_; // 0=fastest, 6=best/slowest. - int rd_opt_level_; // Deduced from method_. - int max_i4_header_bits_; // partition #0 safeness factor + int method_; // 0=fastest, 6=best/slowest. + VP8RDLevel rd_opt_level_; // Deduced from method_. + int max_i4_header_bits_; // partition #0 safeness factor + int thread_level_; // derived from config->thread_level + int do_search_; // derived from config->target_XXX + int use_tokens_; // if true, use token buffer // Memory VP8MBInfo* mb_info_; // contextual macroblock infos (mb_w_ + 1) @@ -453,6 +470,11 @@ void VP8EncFreeBitWriters(VP8Encoder* const enc); // in frame.c extern const uint8_t VP8EncBands[16 + 1]; +extern const uint8_t VP8Cat3[]; +extern const uint8_t VP8Cat4[]; +extern const uint8_t VP8Cat5[]; +extern const uint8_t VP8Cat6[]; + // Form all the four Intra16x16 predictions in the yuv_p_ cache void VP8MakeLuma16Preds(const VP8EncIterator* const it); // Form all the four Chroma8x8 predictions in the yuv_p_ cache @@ -464,9 +486,9 @@ void VP8MakeIntra4Preds(const VP8EncIterator* const it); int VP8GetCostLuma16(VP8EncIterator* const it, const VP8ModeScore* const rd); int VP8GetCostLuma4(VP8EncIterator* const it, const int16_t levels[16]); int VP8GetCostUV(VP8EncIterator* const it, const VP8ModeScore* const rd); -// Main stat / coding passes +// Main coding calls int VP8EncLoop(VP8Encoder* const enc); -int VP8StatLoop(VP8Encoder* const enc); +int VP8EncTokenLoop(VP8Encoder* const enc); // in webpenc.c // Assign an error code to a picture. Return false for convenience. @@ -483,12 +505,14 @@ int VP8EncAnalyze(VP8Encoder* const enc); // Sets up segment's quantization values, base_quant_ and filter strengths. void VP8SetSegmentParams(VP8Encoder* const enc, float quality); // Pick best modes and fills the levels. Returns true if skipped. -int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, int rd_opt); +int VP8Decimate(VP8EncIterator* const it, VP8ModeScore* const rd, + VP8RDLevel rd_opt); // in alpha.c void VP8EncInitAlpha(VP8Encoder* const enc); // initialize alpha compression +int VP8EncStartAlpha(VP8Encoder* const enc); // start alpha coding process int VP8EncFinishAlpha(VP8Encoder* const enc); // finalize compressed data -void VP8EncDeleteAlpha(VP8Encoder* const enc); // delete compressed data +int VP8EncDeleteAlpha(VP8Encoder* const enc); // delete compressed data // in layer.c void VP8EncInitLayer(VP8Encoder* const enc); // init everything diff --git a/third_party/libwebp/enc/vp8l.c b/third_party/libwebp/enc/vp8l.c index 0d0fe65..5077167 100644 --- a/third_party/libwebp/enc/vp8l.c +++ b/third_party/libwebp/enc/vp8l.c @@ -29,6 +29,7 @@ extern "C" { #define PALETTE_KEY_RIGHT_SHIFT 22 // Key for 1K buffer. #define MAX_HUFF_IMAGE_SIZE (16 * 1024 * 1024) +#define MAX_COLORS_FOR_GRAPH 64 // ----------------------------------------------------------------------------- // Palette @@ -36,7 +37,8 @@ extern "C" { static int CompareColors(const void* p1, const void* p2) { const uint32_t a = *(const uint32_t*)p1; const uint32_t b = *(const uint32_t*)p2; - return (a < b) ? -1 : (a > b) ? 1 : 0; + assert(a != b); + return (a < b) ? -1 : 1; } // If number of colors in the image is less than or equal to MAX_PALETTE_SIZE, @@ -98,11 +100,11 @@ static int AnalyzeAndCreatePalette(const WebPPicture* const pic, return 1; } -static int AnalyzeEntropy(const WebPPicture* const pic, +static int AnalyzeEntropy(const uint32_t* argb, + int width, int height, int argb_stride, double* const nonpredicted_bits, double* const predicted_bits) { int x, y; - const uint32_t* argb = pic->argb; const uint32_t* last_line = NULL; uint32_t last_pix = argb[0]; // so we're sure that pix_diff == 0 @@ -114,8 +116,8 @@ static int AnalyzeEntropy(const WebPPicture* const pic, VP8LHistogramInit(predicted, 0); VP8LHistogramInit(nonpredicted, 0); - for (y = 0; y < pic->height; ++y) { - for (x = 0; x < pic->width; ++x) { + for (y = 0; y < height; ++y) { + for (x = 0; x < width; ++x) { const uint32_t pix = argb[x]; const uint32_t pix_diff = VP8LSubPixels(pix, last_pix); if (pix_diff == 0) continue; @@ -131,7 +133,7 @@ static int AnalyzeEntropy(const WebPPicture* const pic, } } last_line = argb; - argb += pic->argb_stride; + argb += argb_stride; } *nonpredicted_bits = VP8LHistogramEstimateBitsBulk(nonpredicted); *predicted_bits = VP8LHistogramEstimateBitsBulk(predicted); @@ -143,24 +145,35 @@ static int VP8LEncAnalyze(VP8LEncoder* const enc, WebPImageHint image_hint) { const WebPPicture* const pic = enc->pic_; assert(pic != NULL && pic->argb != NULL); - enc->use_palette_ = (image_hint == WEBP_HINT_GRAPH) ? 0 : + enc->use_palette_ = AnalyzeAndCreatePalette(pic, enc->palette_, &enc->palette_size_); + + if (image_hint == WEBP_HINT_GRAPH) { + if (enc->use_palette_ && enc->palette_size_ < MAX_COLORS_FOR_GRAPH) { + enc->use_palette_ = 0; + } + } + if (!enc->use_palette_) { - if (image_hint == WEBP_HINT_DEFAULT) { + if (image_hint == WEBP_HINT_PHOTO) { + enc->use_predict_ = 1; + enc->use_cross_color_ = 1; + } else { double non_pred_entropy, pred_entropy; - if (!AnalyzeEntropy(pic, &non_pred_entropy, &pred_entropy)) { + if (!AnalyzeEntropy(pic->argb, pic->width, pic->height, pic->argb_stride, + &non_pred_entropy, &pred_entropy)) { return 0; } - if (pred_entropy < 0.95 * non_pred_entropy) { enc->use_predict_ = 1; + // TODO(vikasa): Observed some correlation of cross_color transform with + // predict. Need to investigate this further and add separate heuristic + // for setting use_cross_color flag. enc->use_cross_color_ = 1; } - } else if (image_hint == WEBP_HINT_PHOTO) { - enc->use_predict_ = 1; - enc->use_cross_color_ = 1; } } + return 1; } @@ -208,7 +221,7 @@ static int GetHuffBitLengthsAndCodes( } // Create Huffman trees. - for (i = 0; i < histogram_image_size; ++i) { + for (i = 0; ok && (i < histogram_image_size); ++i) { HuffmanTreeCode* const codes = &huffman_codes[5 * i]; VP8LHistogram* const histo = histogram_image->histograms[i]; ok = ok && VP8LCreateHuffmanTree(histo->literal_, 15, codes + 0); @@ -219,7 +232,11 @@ static int GetHuffBitLengthsAndCodes( } End: - if (!ok) free(mem_buf); + if (!ok) { + free(mem_buf); + // If one VP8LCreateHuffmanTree() above fails, we need to clean up behind. + memset(huffman_codes, 0, 5 * histogram_image_size * sizeof(*huffman_codes)); + } return ok; } @@ -394,9 +411,10 @@ static int StoreHuffmanCode(VP8LBitWriter* const bw, } static void WriteHuffmanCode(VP8LBitWriter* const bw, - const HuffmanTreeCode* const code, int index) { - const int depth = code->code_lengths[index]; - const int symbol = code->codes[index]; + const HuffmanTreeCode* const code, + int code_index) { + const int depth = code->code_lengths[code_index]; + const int symbol = code->codes[code_index]; VP8LWriteBits(bw, depth, symbol); } @@ -517,7 +535,12 @@ static int EncodeImageInternal(VP8LBitWriter* const bw, sizeof(*histogram_symbols)); assert(histogram_bits >= MIN_HUFFMAN_BITS); assert(histogram_bits <= MAX_HUFFMAN_BITS); - if (histogram_image == NULL || histogram_symbols == NULL) goto Error; + + if (histogram_image == NULL || histogram_symbols == NULL) { + free(histogram_image); + free(histogram_symbols); + return 0; + } // Calculate backward references from ARGB image. if (!VP8LGetBackwardReferences(width, height, argb, quality, cache_bits, @@ -540,6 +563,9 @@ static int EncodeImageInternal(VP8LBitWriter* const bw, !GetHuffBitLengthsAndCodes(histogram_image, huffman_codes)) { goto Error; } + // Free combined histograms. + free(histogram_image); + histogram_image = NULL; // Color Cache parameters. VP8LWriteBits(bw, 1, use_color_cache); @@ -559,10 +585,10 @@ static int EncodeImageInternal(VP8LBitWriter* const bw, uint32_t i; if (histogram_argb == NULL) goto Error; for (i = 0; i < histogram_image_xysize; ++i) { - const int index = histogram_symbols[i] & 0xffff; - histogram_argb[i] = 0xff000000 | (index << 8); - if (index >= max_index) { - max_index = index + 1; + const int symbol_index = histogram_symbols[i] & 0xffff; + histogram_argb[i] = 0xff000000 | (symbol_index << 8); + if (symbol_index >= max_index) { + max_index = symbol_index + 1; } } histogram_image_size = max_index; @@ -586,9 +612,6 @@ static int EncodeImageInternal(VP8LBitWriter* const bw, ClearHuffmanTreeIfOnlyOneSymbol(codes); } } - // Free combined histograms. - free(histogram_image); - histogram_image = NULL; // Store actual literals. StoreImageToBitMask(bw, width, histogram_bits, &refs, @@ -596,7 +619,7 @@ static int EncodeImageInternal(VP8LBitWriter* const bw, ok = 1; Error: - if (!ok) free(histogram_image); + free(histogram_image); VP8LClearBackwardRefs(&refs); if (huffman_codes != NULL) { @@ -694,13 +717,6 @@ static int ApplyCrossColorFilter(const VP8LEncoder* const enc, // ----------------------------------------------------------------------------- -static void PutLE32(uint8_t* const data, uint32_t val) { - data[0] = (val >> 0) & 0xff; - data[1] = (val >> 8) & 0xff; - data[2] = (val >> 16) & 0xff; - data[3] = (val >> 24) & 0xff; -} - static WebPEncodingError WriteRiffHeader(const WebPPicture* const pic, size_t riff_size, size_t vp8l_size) { uint8_t riff[RIFF_HEADER_SIZE + CHUNK_HEADER_SIZE + VP8L_SIGNATURE_SIZE] = { @@ -795,30 +811,24 @@ static WebPEncodingError AllocateTransformBuffer(VP8LEncoder* const enc, return err; } -// Bundles multiple (2, 4 or 8) pixels into a single pixel. -// Returns the new xsize. -static void BundleColorMap(const WebPPicture* const pic, - int xbits, uint32_t* bundled_argb, int xs) { - int y; - const int bit_depth = 1 << (3 - xbits); - uint32_t code = 0; - const uint32_t* argb = pic->argb; - const int width = pic->width; - const int height = pic->height; - - for (y = 0; y < height; ++y) { - int x; +// Bundles multiple (1, 2, 4 or 8) pixels into a single pixel. +static void BundleColorMap(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 mask = (1 << xbits) - 1; const int xsub = x & mask; if (xsub == 0) { - code = 0; + code = 0xff000000; } - // TODO(vikasa): simplify the bundling logic. - code |= (argb[x] & 0xff00) << (bit_depth * xsub); - bundled_argb[y * xs + (x >> xbits)] = 0xff000000 | code; + code |= row[x] << (8 + bit_depth * xsub); + dst[x >> xbits] = code; } - argb += pic->argb_stride; + } else { + for (x = 0; x < width; ++x) dst[x] = 0xff000000 | (row[x] << 8); } } @@ -830,24 +840,43 @@ static WebPEncodingError ApplyPalette(VP8LBitWriter* const bw, WebPEncodingError err = VP8_ENC_OK; int i, x, y; const WebPPicture* const pic = enc->pic_; - uint32_t* argb = pic->argb; + uint32_t* src = pic->argb; + uint32_t* dst; const int width = pic->width; const int height = pic->height; uint32_t* const palette = enc->palette_; const int palette_size = enc->palette_size_; + uint8_t* row = NULL; + 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) goto Error; + dst = enc->argb_; + + row = WebPSafeMalloc((uint64_t)width, sizeof(*row)); + if (row == NULL) return VP8_ENC_ERROR_OUT_OF_MEMORY; + for (y = 0; y < height; ++y) { for (x = 0; x < width; ++x) { - const uint32_t pix = argb[x]; + const uint32_t pix = src[x]; for (i = 0; i < palette_size; ++i) { if (pix == palette[i]) { - argb[x] = 0xff000000u | (i << 8); + row[x] = i; break; } } } - argb += pic->argb_stride; + BundleColorMap(row, width, xbits, dst); + src += pic->argb_stride; + dst += enc->current_width_; } // Save palette to bitstream. @@ -863,20 +892,8 @@ static WebPEncodingError ApplyPalette(VP8LBitWriter* const bw, goto Error; } - if (palette_size <= 16) { - // Image can be packed (multiple pixels per uint32_t). - int xbits = 1; - if (palette_size <= 2) { - xbits = 3; - } else if (palette_size <= 4) { - xbits = 2; - } - err = AllocateTransformBuffer(enc, VP8LSubSampleSize(width, xbits), height); - if (err != VP8_ENC_OK) goto Error; - BundleColorMap(pic, xbits, enc->argb_, enc->current_width_); - } - Error: + free(row); return err; } @@ -886,13 +903,13 @@ static int GetHistoBits(const WebPConfig* const config, const WebPPicture* const pic) { const int width = pic->width; const int height = pic->height; - const size_t hist_size = sizeof(VP8LHistogram); + const uint64_t hist_size = sizeof(VP8LHistogram); // Make tile size a function of encoding method (Range: 0 to 6). int histo_bits = 7 - config->method; while (1) { - const size_t huff_image_size = VP8LSubSampleSize(width, histo_bits) * - VP8LSubSampleSize(height, histo_bits) * - hist_size; + const uint64_t huff_image_size = VP8LSubSampleSize(width, histo_bits) * + VP8LSubSampleSize(height, histo_bits) * + hist_size; if (huff_image_size <= MAX_HUFF_IMAGE_SIZE) break; ++histo_bits; } @@ -961,6 +978,7 @@ WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, if (enc->use_palette_) { err = ApplyPalette(bw, enc, quality); if (err != VP8_ENC_OK) goto Error; + // Color cache is disabled for palette. enc->cache_bits_ = 0; } diff --git a/third_party/libwebp/enc/webpenc.c b/third_party/libwebp/enc/webpenc.c index 3c27558..5e13ddc 100644 --- a/third_party/libwebp/enc/webpenc.c +++ b/third_party/libwebp/enc/webpenc.c @@ -93,34 +93,53 @@ static void ResetBoundaryPredictions(VP8Encoder* const enc) { enc->nz_[-1] = 0; // constant } -// Map configured quality level to coding tools used. -//-------------+---+---+---+---+---+---+ -// Quality | 0 | 1 | 2 | 3 | 4 | 5 + -//-------------+---+---+---+---+---+---+ -// dynamic prob| ~ | x | x | x | x | x | -//-------------+---+---+---+---+---+---+ -// rd-opt modes| | | x | x | x | x | -//-------------+---+---+---+---+---+---+ -// fast i4/i16 | x | x | | | | | -//-------------+---+---+---+---+---+---+ -// rd-opt i4/16| | | x | x | x | x | -//-------------+---+---+---+---+---+---+ -// Trellis | | x | | | x | x | -//-------------+---+---+---+---+---+---+ -// full-SNS | | | | | | x | -//-------------+---+---+---+---+---+---+ +// Mapping from config->method_ to coding tools used. +//-------------------+---+---+---+---+---+---+---+ +// Method | 0 | 1 | 2 | 3 |(4)| 5 | 6 | +//-------------------+---+---+---+---+---+---+---+ +// fast probe | x | | | x | | | | +//-------------------+---+---+---+---+---+---+---+ +// dynamic proba | ~ | x | x | x | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// fast mode analysis| | | | | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// basic rd-opt | | | | x | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// disto-score i4/16 | | | x | | | | | +//-------------------+---+---+---+---+---+---+---+ +// rd-opt i4/16 | | | ~ | x | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// token buffer (opt)| | | | x | x | x | x | +//-------------------+---+---+---+---+---+---+---+ +// Trellis | | | | | | x |Ful| +//-------------------+---+---+---+---+---+---+---+ +// full-SNS | | | | | x | x | x | +//-------------------+---+---+---+---+---+---+---+ static void MapConfigToTools(VP8Encoder* const enc) { - const int method = enc->config_->method; - const int limit = 100 - enc->config_->partition_limit; + const WebPConfig* const config = enc->config_; + const int method = config->method; + const int limit = 100 - config->partition_limit; enc->method_ = method; - enc->rd_opt_level_ = (method >= 6) ? 3 - : (method >= 5) ? 2 - : (method >= 3) ? 1 - : 0; + enc->rd_opt_level_ = (method >= 6) ? RD_OPT_TRELLIS_ALL + : (method >= 5) ? RD_OPT_TRELLIS + : (method >= 3) ? RD_OPT_BASIC + : RD_OPT_NONE; enc->max_i4_header_bits_ = 256 * 16 * 16 * // upper bound: up to 16bit per 4x4 block (limit * limit) / (100 * 100); // ... modulated with a quadratic curve. + + enc->thread_level_ = config->thread_level; + + enc->do_search_ = (config->target_size > 0 || config->target_PSNR > 0); + if (!config->low_memory) { +#if !defined(DISABLE_TOKEN_BUFFER) + enc->use_tokens_ = (method >= 3) && !enc->do_search_; +#endif + if (enc->use_tokens_) { + enc->num_parts_ = 1; // doesn't work with multi-partition + } + } } // Memory scaling with dimensions: @@ -259,17 +278,21 @@ static VP8Encoder* InitVP8Encoder(const WebPConfig* const config, VP8EncInitLayer(enc); #endif + VP8TBufferInit(&enc->tokens_); return enc; } -static void DeleteVP8Encoder(VP8Encoder* enc) { +static int DeleteVP8Encoder(VP8Encoder* enc) { + int ok = 1; if (enc != NULL) { - VP8EncDeleteAlpha(enc); + ok = VP8EncDeleteAlpha(enc); #ifdef WEBP_EXPERIMENTAL_FEATURES VP8EncDeleteLayer(enc); #endif + VP8TBufferClear(&enc->tokens_); free(enc); } + return ok; } //------------------------------------------------------------------------------ @@ -332,7 +355,7 @@ int WebPReportProgress(const WebPPicture* const pic, //------------------------------------------------------------------------------ int WebPEncode(const WebPConfig* config, WebPPicture* pic) { - int ok; + int ok = 0; if (pic == NULL) return 0; @@ -361,19 +384,26 @@ int WebPEncode(const WebPConfig* config, WebPPicture* pic) { 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) + ok = VP8EncAnalyze(enc); + + // Analysis is done, proceed to actual coding. + ok = ok && VP8EncStartAlpha(enc); // possibly done in parallel + if (!enc->use_tokens_) { + ok = VP8EncLoop(enc); + } else { + ok = VP8EncTokenLoop(enc); + } + ok = ok && VP8EncFinishAlpha(enc); #ifdef WEBP_EXPERIMENTAL_FEATURES - && VP8EncFinishLayer(enc) + ok = ok && VP8EncFinishLayer(enc); #endif - && VP8EncWrite(enc); + + ok = ok && VP8EncWrite(enc); StoreStats(enc); if (!ok) { VP8EncFreeBitWriters(enc); } - DeleteVP8Encoder(enc); + ok &= DeleteVP8Encoder(enc); // must always be called, even if !ok } else { if (pic->argb == NULL) return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER); diff --git a/third_party/libwebp/libwebp.gyp b/third_party/libwebp/libwebp.gyp index 2fe4a4b..1eb2217 100644 --- a/third_party/libwebp/libwebp.gyp +++ b/third_party/libwebp/libwebp.gyp @@ -28,6 +28,14 @@ ], }, { + 'target_name': 'libwebp_demux', + 'type': 'static_library', + 'include_dirs': ['.'], + 'sources': [ + 'demux/demux.c', + ], + }, + { 'target_name': 'libwebp_dsp', 'type': 'static_library', 'include_dirs': ['.'], @@ -63,8 +71,10 @@ 'include_dirs': ['.'], 'sources': [ 'dsp/dec_neon.c', + 'dsp/enc_neon.c', + 'dsp/upsampling_neon.c', ], - # behavior similar dsp_neon.c.neon in an Android.mk + # behavior similar to *.c.neon in an Android.mk 'cflags!': [ '-mfpu=vfpv3-d16' ], 'cflags': [ '-mfpu=neon' ], },{ # "armv7 != 1" @@ -97,6 +107,7 @@ 'enc/picture.c', 'enc/quant.c', 'enc/syntax.c', + 'enc/token.c', 'enc/tree.c', 'enc/vp8l.c', 'enc/webpenc.c', @@ -114,6 +125,7 @@ 'utils/huffman.c', 'utils/huffman_encode.c', 'utils/quant_levels.c', + 'utils/quant_levels_dec.c', 'utils/rescaler.c', 'utils/thread.c', 'utils/utils.c', @@ -124,6 +136,7 @@ 'type': 'none', 'dependencies' : [ 'libwebp_dec', + 'libwebp_demux', 'libwebp_dsp', 'libwebp_dsp_neon', 'libwebp_enc', diff --git a/third_party/libwebp/utils/bit_reader.c b/third_party/libwebp/utils/bit_reader.c index 1afb1db..d6cfd86 100644 --- a/third_party/libwebp/utils/bit_reader.c +++ b/third_party/libwebp/utils/bit_reader.c @@ -15,7 +15,11 @@ extern "C" { #endif -#define MK(X) (((bit_t)(X) << (BITS)) | (MASK)) +#ifndef USE_RIGHT_JUSTIFY +#define MK(X) (((range_t)(X) << (BITS)) | (MASK)) +#else +#define MK(X) ((range_t)(X)) +#endif //------------------------------------------------------------------------------ // VP8BitReader @@ -29,7 +33,7 @@ void VP8InitBitReader(VP8BitReader* const br, br->buf_ = start; br->buf_end_ = end; br->value_ = 0; - br->missing_ = 8; // to load the very first 8bits + br->bits_ = -8; // to load the very first 8bits br->eof_ = 0; } @@ -46,7 +50,7 @@ const uint8_t kVP8Log2Range[128] = { }; // range = (range << kVP8Log2Range[range]) + trailing 1's -const bit_t kVP8NewRange[128] = { +const range_t kVP8NewRange[128] = { MK(127), MK(127), MK(191), MK(127), MK(159), MK(191), MK(223), MK(127), MK(143), MK(159), MK(175), MK(191), MK(207), MK(223), MK(239), MK(127), MK(135), MK(143), MK(151), MK(159), MK(167), MK(175), MK(183), MK(191), @@ -71,9 +75,19 @@ void VP8LoadFinalBytes(VP8BitReader* const br) { assert(br != NULL && br->buf_ != NULL); // Only read 8bits at a time if (br->buf_ < br->buf_end_) { - br->value_ |= (bit_t)(*br->buf_++) << ((BITS) - 8 + br->missing_); - br->missing_ -= 8; - } else { +#ifndef USE_RIGHT_JUSTIFY + br->value_ |= (bit_t)(*br->buf_++) << ((BITS) - 8 - br->bits_); +#else + br->value_ = (bit_t)(*br->buf_++) | (br->value_ << 8); +#endif + br->bits_ += 8; + } else if (!br->eof_) { +#ifdef USE_RIGHT_JUSTIFY + // These are not strictly needed, but it makes the behaviour + // consistent for both USE_RIGHT_JUSTIFY and !USE_RIGHT_JUSTIFY. + br->value_ <<= 8; + br->bits_ += 8; +#endif br->eof_ = 1; } } @@ -99,6 +113,10 @@ int32_t VP8GetSignedValue(VP8BitReader* const br, int bits) { #define MAX_NUM_BIT_READ 25 +#define LBITS 64 // Number of bits prefetched. +#define WBITS 32 // Minimum number of bytes needed after VP8LFillBitWindow. +#define LOG8_WBITS 4 // Number of bytes needed to store WBITS bits. + static const uint32_t kBitMask[MAX_NUM_BIT_READ] = { 0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535, 131071, 262143, 524287, 1048575, 2097151, 4194303, 8388607, 16777215 @@ -120,7 +138,7 @@ void VP8LInitBitReader(VP8LBitReader* const br, br->eos_ = 0; br->error_ = 0; for (i = 0; i < sizeof(br->val_) && i < br->len_; ++i) { - br->val_ |= ((uint64_t)br->buf_[br->pos_]) << (8 * i); + br->val_ |= ((vp8l_val_t)br->buf_[br->pos_]) << (8 * i); ++br->pos_; } } @@ -135,91 +153,56 @@ void VP8LBitReaderSetBuffer(VP8LBitReader* const br, br->len_ = len; } +// If not at EOS, reload up to LBITS byte-by-byte static void ShiftBytes(VP8LBitReader* const br) { while (br->bit_pos_ >= 8 && br->pos_ < br->len_) { br->val_ >>= 8; - br->val_ |= ((uint64_t)br->buf_[br->pos_]) << 56; + br->val_ |= ((vp8l_val_t)br->buf_[br->pos_]) << (LBITS - 8); ++br->pos_; br->bit_pos_ -= 8; } } void VP8LFillBitWindow(VP8LBitReader* const br) { - if (br->bit_pos_ >= 32) { -#if defined(__x86_64__) || defined(_M_X64) - if (br->pos_ + 8 < br->len_) { - br->val_ >>= 32; + if (br->bit_pos_ >= WBITS) { +#if (defined(__x86_64__) || defined(_M_X64)) + if (br->pos_ + sizeof(br->val_) < br->len_) { + br->val_ >>= WBITS; + br->bit_pos_ -= WBITS; // The expression below needs a little-endian arch to work correctly. // This gives a large speedup for decoding speed. - br->val_ |= *(const uint64_t *)(br->buf_ + br->pos_) << 32; - br->pos_ += 4; - br->bit_pos_ -= 32; - } else { - // Slow path. - ShiftBytes(br); + br->val_ |= *(const vp8l_val_t*)(br->buf_ + br->pos_) << (LBITS - WBITS); + br->pos_ += LOG8_WBITS; + return; } -#else - // Always the slow path. - ShiftBytes(br); #endif - } - if (br->pos_ == br->len_ && br->bit_pos_ == 64) { - br->eos_ = 1; - } -} - -uint32_t VP8LReadOneBit(VP8LBitReader* const br) { - const uint32_t val = (br->val_ >> br->bit_pos_) & 1; - // Flag an error at end_of_stream. - if (!br->eos_) { - ++br->bit_pos_; - if (br->bit_pos_ >= 32) { - ShiftBytes(br); - } - // After this last bit is read, check if eos needs to be flagged. - if (br->pos_ == br->len_ && br->bit_pos_ == 64) { + ShiftBytes(br); // Slow path. + if (br->pos_ == br->len_ && br->bit_pos_ == LBITS) { br->eos_ = 1; } - } else { - br->error_ = 1; } - return val; } uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits) { - uint32_t val = 0; assert(n_bits >= 0); // Flag an error if end_of_stream or n_bits is more than allowed limit. if (!br->eos_ && n_bits < MAX_NUM_BIT_READ) { + const uint32_t val = + (uint32_t)(br->val_ >> br->bit_pos_) & kBitMask[n_bits]; + const int new_bits = br->bit_pos_ + n_bits; + br->bit_pos_ = new_bits; // If this read is going to cross the read buffer, set the eos flag. if (br->pos_ == br->len_) { - if ((br->bit_pos_ + n_bits) >= 64) { + if (new_bits >= LBITS) { br->eos_ = 1; - if ((br->bit_pos_ + n_bits) > 64) return val; - } - } - val = (br->val_ >> br->bit_pos_) & kBitMask[n_bits]; - br->bit_pos_ += n_bits; - if (br->bit_pos_ >= 40) { - if (br->pos_ + 5 < br->len_) { - br->val_ >>= 40; - br->val_ |= - (((uint64_t)br->buf_[br->pos_ + 0]) << 24) | - (((uint64_t)br->buf_[br->pos_ + 1]) << 32) | - (((uint64_t)br->buf_[br->pos_ + 2]) << 40) | - (((uint64_t)br->buf_[br->pos_ + 3]) << 48) | - (((uint64_t)br->buf_[br->pos_ + 4]) << 56); - br->pos_ += 5; - br->bit_pos_ -= 40; - } - if (br->bit_pos_ >= 8) { - ShiftBytes(br); } } + ShiftBytes(br); + return val; } else { br->error_ = 1; + return 0; } - return val; } //------------------------------------------------------------------------------ diff --git a/third_party/libwebp/utils/bit_reader.h b/third_party/libwebp/utils/bit_reader.h index 36fc13e..ccf450c 100644 --- a/third_party/libwebp/utils/bit_reader.h +++ b/third_party/libwebp/utils/bit_reader.h @@ -24,11 +24,80 @@ extern "C" { #endif -#define BITS 32 // can be 32, 16 or 8 -#define MASK ((((bit_t)1) << (BITS)) - 1) -#if (BITS == 32) -typedef uint64_t bit_t; // natural register type -typedef uint32_t lbit_t; // natural type for memory I/O +// 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 a few of them +// ahead (actually, we cache BITS of them ahead. See below). There's two +// strategies regarding how to shift these looked-ahead fresh bits into the +// 8bit window of value_: either we shift them in, while keeping the position of +// the window fixed. Or we slide the window to the right while keeping the cache +// bits at a fixed, right-justified, position. +// +// Example, for BITS=16: here is the content of value_ for both strategies: +// +// !USE_RIGHT_JUSTIFY || USE_RIGHT_JUSTIFY +// || +// <- 8b -><- 8b -><- BITS bits -> || <- 8b+3b -><- 8b -><- 13 bits -> +// [unused][value_][cached bits][0] || [unused...][value_][cached bits] +// [........00vvvvvvBBBBBBBBBBBBB000]LSB || [...........00vvvvvvBBBBBBBBBBBBB] +// || +// After calling VP8Shift(), where we need to shift away two zeros: +// [........vvvvvvvvBBBBBBBBBBB00000]LSB || [.............vvvvvvvvBBBBBBBBBBB] +// || +// Just before we need to call VP8LoadNewBytes(), the situation is: +// [........vvvvvv000000000000000000]LSB || [..........................vvvvvv] +// || +// And just after calling VP8LoadNewBytes(): +// [........vvvvvvvvBBBBBBBBBBBBBBBB]LSB || [........vvvvvvvvBBBBBBBBBBBBBBBB] +// +// -> we're back to height active 'value_' bits (marked 'v') and BITS cached +// bits (marked 'B') +// +// The right-justify strategy tends to use less shifts and is often faster. + +//------------------------------------------------------------------------------ +// BITS can be any multiple of 8 from 8 to 56 (inclusive). +// Pick values that fit natural register size. + +#if !defined(WEBP_REFERENCE_IMPLEMENTATION) + +#define USE_RIGHT_JUSTIFY + +#if defined(__i386__) || defined(_M_IX86) // x86 32bit +#define BITS 16 +#elif defined(__x86_64__) || defined(_M_X64) // x86 64bit +#define BITS 56 +#elif defined(__arm__) || defined(_M_ARM) // ARM +#define BITS 24 +#else // reasonable default +#define BITS 24 +#endif + +#else // reference choices + +#define USE_RIGHT_JUSTIFY +#define BITS 8 + +#endif + +//------------------------------------------------------------------------------ +// Derived types and constants + +// bit_t = natural register type +// lbit_t = natural type for memory I/O + +#if (BITS > 32) +typedef uint64_t bit_t; +typedef uint64_t lbit_t; +#elif (BITS == 32) +typedef uint64_t bit_t; +typedef uint32_t lbit_t; +#elif (BITS == 24) +typedef uint32_t bit_t; +typedef uint32_t lbit_t; #elif (BITS == 16) typedef uint32_t bit_t; typedef uint16_t lbit_t; @@ -37,8 +106,15 @@ typedef uint32_t bit_t; typedef uint8_t lbit_t; #endif +#ifndef USE_RIGHT_JUSTIFY +typedef bit_t range_t; // type for storing range_ +#define MASK ((((bit_t)1) << (BITS)) - 1) +#else +typedef uint32_t range_t; // range_ only uses 8bits here. No need for bit_t. +#endif + //------------------------------------------------------------------------------ -// Bitreader and code-tree reader +// Bitreader typedef struct VP8BitReader VP8BitReader; struct VP8BitReader { @@ -47,9 +123,9 @@ struct VP8BitReader { int eof_; // true if input is exhausted // boolean decoder - bit_t range_; // current range minus 1. In [127, 254] interval. - bit_t value_; // current value - int missing_; // number of missing bits in value_ (8bit) + range_t range_; // current range minus 1. In [127, 254] interval. + bit_t value_; // current value + int bits_; // number of valid bits left }; // Initialize the bit reader and the boolean decoder. @@ -67,12 +143,12 @@ int32_t VP8GetSignedValue(VP8BitReader* const br, int num_bits); // Read a bit with proba 'prob'. Speed-critical function! extern const uint8_t kVP8Log2Range[128]; -extern const bit_t kVP8NewRange[128]; +extern const range_t kVP8NewRange[128]; void VP8LoadFinalBytes(VP8BitReader* const br); // special case for the tail static WEBP_INLINE void VP8LoadNewBytes(VP8BitReader* const br) { - assert(br && br->buf_); + assert(br != NULL && br->buf_ != NULL); // Read 'BITS' bits at a time if possible. if (br->buf_ + sizeof(lbit_t) <= br->buf_end_) { // convert memory type to register type (with some zero'ing!) @@ -80,68 +156,124 @@ static WEBP_INLINE void VP8LoadNewBytes(VP8BitReader* const br) { lbit_t in_bits = *(lbit_t*)br->buf_; br->buf_ += (BITS) >> 3; #if !defined(__BIG_ENDIAN__) -#if (BITS == 32) +#if (BITS > 32) +// gcc 4.3 has builtin functions for swap32/swap64 +#if defined(__GNUC__) && \ + (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) + bits = (bit_t)__builtin_bswap64(in_bits); +#elif defined(_MSC_VER) + bits = (bit_t)_byteswap_uint64(in_bits); +#elif defined(__x86_64__) + __asm__ volatile("bswapq %0" : "=r"(bits) : "0"(in_bits)); +#else // generic code for swapping 64-bit values (suggested by bdb@) + bits = (bit_t)in_bits; + bits = ((bits & 0xffffffff00000000ull) >> 32) | + ((bits & 0x00000000ffffffffull) << 32); + bits = ((bits & 0xffff0000ffff0000ull) >> 16) | + ((bits & 0x0000ffff0000ffffull) << 16); + bits = ((bits & 0xff00ff00ff00ff00ull) >> 8) | + ((bits & 0x00ff00ff00ff00ffull) << 8); +#endif + bits >>= 64 - BITS; +#elif (BITS >= 24) #if defined(__i386__) || defined(__x86_64__) __asm__ volatile("bswap %k0" : "=r"(in_bits) : "0"(in_bits)); - bits = (bit_t)in_bits; // 32b -> 64b zero-extension + bits = (bit_t)in_bits; // 24b/32b -> 32b/64b zero-extension #elif defined(_MSC_VER) - bits = _byteswap_ulong(in_bits); + bits = (bit_t)_byteswap_ulong(in_bits); #else bits = (bit_t)(in_bits >> 24) | ((in_bits >> 8) & 0xff00) | ((in_bits << 8) & 0xff0000) | (in_bits << 24); #endif // x86 + bits >>= (32 - BITS); #elif (BITS == 16) // gcc will recognize a 'rorw $8, ...' here: bits = (bit_t)(in_bits >> 8) | ((in_bits & 0xff) << 8); +#else // BITS == 8 + bits = (bit_t)in_bits; #endif -#else // LITTLE_ENDIAN +#else // BIG_ENDIAN bits = (bit_t)in_bits; #endif - br->value_ |= bits << br->missing_; - br->missing_ -= (BITS); +#ifndef USE_RIGHT_JUSTIFY + br->value_ |= bits << (-br->bits_); +#else + br->value_ = bits | (br->value_ << (BITS)); +#endif + br->bits_ += (BITS); } else { VP8LoadFinalBytes(br); // no need to be inlined } } -static WEBP_INLINE int VP8BitUpdate(VP8BitReader* const br, bit_t split) { - const bit_t value_split = split | (MASK); - if (br->missing_ > 0) { // Make sure we have a least BITS bits in 'value_' +static WEBP_INLINE int VP8BitUpdate(VP8BitReader* const br, range_t split) { + if (br->bits_ < 0) { // Make sure we have a least BITS bits in 'value_' VP8LoadNewBytes(br); } - if (br->value_ > value_split) { - br->range_ -= value_split + 1; - br->value_ -= value_split + 1; +#ifndef USE_RIGHT_JUSTIFY + split |= (MASK); + if (br->value_ > split) { + br->range_ -= split + 1; + br->value_ -= split + 1; return 1; } else { - br->range_ = value_split; + br->range_ = split; return 0; } +#else + { + const int pos = br->bits_; + const range_t value = (range_t)(br->value_ >> pos); + if (value > split) { + br->range_ -= split + 1; + br->value_ -= (bit_t)(split + 1) << pos; + return 1; + } else { + br->range_ = split; + return 0; + } + } +#endif } static WEBP_INLINE void VP8Shift(VP8BitReader* const br) { +#ifndef USE_RIGHT_JUSTIFY // range_ is in [0..127] interval here. - const int idx = br->range_ >> (BITS); + const bit_t idx = br->range_ >> (BITS); const int shift = kVP8Log2Range[idx]; br->range_ = kVP8NewRange[idx]; br->value_ <<= shift; - br->missing_ += shift; + br->bits_ -= shift; +#else + const int shift = kVP8Log2Range[br->range_]; + assert(br->range_ < (range_t)128); + br->range_ = kVP8NewRange[br->range_]; + br->bits_ -= shift; +#endif } - static WEBP_INLINE int VP8GetBit(VP8BitReader* const br, int prob) { +#ifndef USE_RIGHT_JUSTIFY // It's important to avoid generating a 64bit x 64bit multiply here. // We just need an 8b x 8b after all. - const bit_t split = - (bit_t)((uint32_t)(br->range_ >> (BITS)) * prob) << ((BITS) - 8); + const range_t split = + (range_t)((uint32_t)(br->range_ >> (BITS)) * prob) << ((BITS) - 8); + const int bit = VP8BitUpdate(br, split); + if (br->range_ <= (((range_t)0x7e << (BITS)) | (MASK))) { + VP8Shift(br); + } + return bit; +#else + const range_t split = (br->range_ * prob) >> 8; const int bit = VP8BitUpdate(br, split); - if (br->range_ <= (((bit_t)0x7e << (BITS)) | (MASK))) { + if (br->range_ <= (range_t)0x7e) { VP8Shift(br); } return bit; +#endif } static WEBP_INLINE int VP8GetSigned(VP8BitReader* const br, int v) { - const bit_t split = (br->range_ >> 1); + const range_t split = (br->range_ >> 1); const int bit = VP8BitUpdate(br, split); VP8Shift(br); return bit ? -v : v; @@ -149,16 +281,18 @@ static WEBP_INLINE int VP8GetSigned(VP8BitReader* const br, int v) { // ----------------------------------------------------------------------------- -// Bitreader +// Bitreader for lossless format + +typedef uint64_t vp8l_val_t; // right now, this bit-reader can only use 64bit. typedef struct { - uint64_t val_; - const uint8_t* buf_; - size_t len_; - size_t pos_; - int bit_pos_; - int eos_; - int error_; + vp8l_val_t val_; // pre-fetched bits + const uint8_t* buf_; // input byte buffer + size_t len_; // buffer length + size_t pos_; // byte position in buf_ + int bit_pos_; // current bit-reading position in val_ + int eos_; // bitstream is finished + int error_; // an error occurred (buffer overflow attempt...) } VP8LBitReader; void VP8LInitBitReader(VP8LBitReader* const br, @@ -174,17 +308,14 @@ void VP8LBitReaderSetBuffer(VP8LBitReader* const br, // Flags eos if this read attempt is going to cross the read buffer. uint32_t VP8LReadBits(VP8LBitReader* const br, int n_bits); -// Reads one bit from Read Buffer. Flags an error in case end_of_stream. -// Flags eos after reading last bit from the buffer. -uint32_t VP8LReadOneBit(VP8LBitReader* const br); - -// VP8LReadOneBitUnsafe is faster than VP8LReadOneBit, but it can be called only -// 32 times after the last VP8LFillBitWindow. Any subsequent calls -// (without VP8LFillBitWindow) will return invalid data. -static WEBP_INLINE uint32_t VP8LReadOneBitUnsafe(VP8LBitReader* const br) { - const uint32_t val = (br->val_ >> br->bit_pos_) & 1; - ++br->bit_pos_; - return val; +// Return the prefetched bits, so they can be looked up. +static WEBP_INLINE uint32_t VP8LPrefetchBits(VP8LBitReader* const br) { + return (uint32_t)(br->val_ >> br->bit_pos_); +} + +// Discard 'num_bits' bits from the cache. +static WEBP_INLINE void VP8LDiscardBits(VP8LBitReader* const br, int num_bits) { + br->bit_pos_ += num_bits; } // Advances the Read buffer by 4 bytes to make room for reading next 32 bits. diff --git a/third_party/libwebp/utils/filters.c b/third_party/libwebp/utils/filters.c index 08f52a3..9486355 100644 --- a/third_party/libwebp/utils/filters.c +++ b/third_party/libwebp/utils/filters.c @@ -26,8 +26,7 @@ extern "C" { assert(out != NULL); \ assert(width > 0); \ assert(height > 0); \ - assert(bpp > 0); \ - assert(stride >= width * bpp); + assert(stride >= width); static WEBP_INLINE void PredictLine(const uint8_t* src, const uint8_t* pred, uint8_t* dst, int length, int inverse) { @@ -43,7 +42,8 @@ static WEBP_INLINE void PredictLine(const uint8_t* src, const uint8_t* pred, // Horizontal filter. static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in, - int width, int height, int bpp, int stride, int inverse, uint8_t* out) { + int width, int height, int stride, + int inverse, uint8_t* out) { int h; const uint8_t* preds = (inverse ? out : in); SANITY_CHECK(in, out); @@ -52,11 +52,11 @@ static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in, for (h = 0; h < height; ++h) { // Leftmost pixel is predicted from above (except for topmost scanline). if (h == 0) { - memcpy((void*)out, (const void*)in, bpp); + out[0] = in[0]; } else { - PredictLine(in, preds - stride, out, bpp, inverse); + PredictLine(in, preds - stride, out, 1, inverse); } - PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); + PredictLine(in + 1, preds, out + 1, width - 1, inverse); preds += stride; in += stride; out += stride; @@ -64,46 +64,46 @@ static WEBP_INLINE void DoHorizontalFilter(const uint8_t* in, } static void HorizontalFilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* filtered_data) { - DoHorizontalFilter(data, width, height, bpp, stride, 0, filtered_data); + int stride, uint8_t* filtered_data) { + DoHorizontalFilter(data, width, height, stride, 0, filtered_data); } -static void HorizontalUnfilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* recon_data) { - DoHorizontalFilter(data, width, height, bpp, stride, 1, recon_data); +static void HorizontalUnfilter(int width, int height, int stride, + uint8_t* data) { + DoHorizontalFilter(data, width, height, stride, 1, data); } //------------------------------------------------------------------------------ // Vertical filter. static WEBP_INLINE void DoVerticalFilter(const uint8_t* in, - int width, int height, int bpp, int stride, int inverse, uint8_t* out) { + int width, int height, int stride, + int inverse, uint8_t* out) { int h; const uint8_t* preds = (inverse ? out : in); SANITY_CHECK(in, out); // Very first top-left pixel is copied. - memcpy((void*)out, (const void*)in, bpp); + out[0] = in[0]; // Rest of top scan-line is left-predicted. - PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); + PredictLine(in + 1, preds, out + 1, width - 1, inverse); // Filter line-by-line. for (h = 1; h < height; ++h) { in += stride; out += stride; - PredictLine(in, preds, out, bpp * width, inverse); + PredictLine(in, preds, out, width, inverse); preds += stride; } } static void VerticalFilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* filtered_data) { - DoVerticalFilter(data, width, height, bpp, stride, 0, filtered_data); + int stride, uint8_t* filtered_data) { + DoVerticalFilter(data, width, height, stride, 0, filtered_data); } -static void VerticalUnfilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* recon_data) { - DoVerticalFilter(data, width, height, bpp, stride, 1, recon_data); +static void VerticalUnfilter(int width, int height, int stride, uint8_t* data) { + DoVerticalFilter(data, width, height, stride, 1, data); } //------------------------------------------------------------------------------ @@ -111,19 +111,19 @@ static void VerticalUnfilter(const uint8_t* data, int width, int height, static WEBP_INLINE int GradientPredictor(uint8_t a, uint8_t b, uint8_t c) { const int g = a + b - c; - return (g < 0) ? 0 : (g > 255) ? 255 : g; + 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 bpp, int stride, int inverse, uint8_t* out) { + int stride, int inverse, uint8_t* out) { const uint8_t* preds = (inverse ? out : in); int h; SANITY_CHECK(in, out); // left prediction for top scan-line - memcpy((void*)out, (const void*)in, bpp); - PredictLine(in + bpp, preds, out + bpp, bpp * (width - 1), inverse); + out[0] = in[0]; + PredictLine(in + 1, preds, out + 1, width - 1, inverse); // Filter line-by-line. for (h = 1; h < height; ++h) { @@ -132,24 +132,23 @@ void DoGradientFilter(const uint8_t* in, int width, int height, in += stride; out += stride; // leftmost pixel: predict from above. - PredictLine(in, preds - stride, out, bpp, inverse); - for (w = bpp; w < width * bpp; ++w) { - const int pred = GradientPredictor(preds[w - bpp], + 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 - bpp]); + preds[w - stride - 1]); out[w] = in[w] + (inverse ? pred : -pred); } } } static void GradientFilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* filtered_data) { - DoGradientFilter(data, width, height, bpp, stride, 0, filtered_data); + int stride, uint8_t* filtered_data) { + DoGradientFilter(data, width, height, stride, 0, filtered_data); } -static void GradientUnfilter(const uint8_t* data, int width, int height, - int bpp, int stride, uint8_t* recon_data) { - DoGradientFilter(data, width, height, bpp, stride, 1, recon_data); +static void GradientUnfilter(int width, int height, int stride, uint8_t* data) { + DoGradientFilter(data, width, height, stride, 1, data); } #undef SANITY_CHECK @@ -215,7 +214,7 @@ const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST] = { GradientFilter // WEBP_FILTER_GRADIENT }; -const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST] = { +const WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST] = { NULL, // WEBP_FILTER_NONE HorizontalUnfilter, // WEBP_FILTER_HORIZONTAL VerticalUnfilter, // WEBP_FILTER_VERTICAL diff --git a/third_party/libwebp/utils/filters.h b/third_party/libwebp/utils/filters.h index c5cdbd6..8982523 100644 --- a/third_party/libwebp/utils/filters.h +++ b/third_party/libwebp/utils/filters.h @@ -30,18 +30,19 @@ typedef enum { } WEBP_FILTER_TYPE; typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height, - int bpp, int stride, uint8_t* out); + int stride, uint8_t* out); +typedef void (*WebPUnfilterFunc)(int width, int height, int stride, + uint8_t* data); // Filter the given data using the given predictor. // 'in' corresponds to a 2-dimensional pixel array of size (stride * height) // in raster order. -// 'bpp' is number of bytes per pixel, and // 'stride' is number of bytes per scan line (with possible padding). // 'out' should be pre-allocated. extern const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST]; -// Reconstruct the original data from the given filtered data. -extern const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST]; +// In-place reconstruct the original data from the given filtered data. +extern const WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST]; // Fast estimate of a potentially good filter. extern WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data, diff --git a/third_party/libwebp/utils/huffman_encode.c b/third_party/libwebp/utils/huffman_encode.c index 8ccd291..2d680e3 100644 --- a/third_party/libwebp/utils/huffman_encode.c +++ b/third_party/libwebp/utils/huffman_encode.c @@ -138,13 +138,8 @@ static int CompareHuffmanTrees(const void* ptr1, const void* ptr2) { } else if (t1->total_count_ < t2->total_count_) { return 1; } else { - if (t1->value_ < t2->value_) { - return -1; - } - if (t1->value_ > t2->value_) { - return 1; - } - return 0; + assert(t1->value_ != t2->value_); + return (t1->value_ < t2->value_) ? -1 : 1; } } @@ -193,6 +188,10 @@ static int GenerateOptimalTree(const int* const histogram, int histogram_size, } } + if (tree_size_orig == 0) { // pretty optimal already! + return 1; + } + // 3 * tree_size is enough to cover all the nodes representing a // population and all the inserted nodes combining two existing nodes. // The tree pool needs 2 * (tree_size_orig - 1) entities, and the @@ -234,7 +233,7 @@ static int GenerateOptimalTree(const int* const histogram, int histogram_size, tree_pool[tree_pool_size++] = tree[tree_size - 1]; tree_pool[tree_pool_size++] = tree[tree_size - 2]; count = tree_pool[tree_pool_size - 1].total_count_ + - tree_pool[tree_pool_size - 2].total_count_; + tree_pool[tree_pool_size - 2].total_count_; tree_size -= 2; { // Search for the insertion point. diff --git a/third_party/libwebp/utils/quant_levels.c b/third_party/libwebp/utils/quant_levels.c index f688439..649aae6 100644 --- a/third_party/libwebp/utils/quant_levels.c +++ b/third_party/libwebp/utils/quant_levels.c @@ -140,15 +140,6 @@ int QuantizeLevels(uint8_t* const data, int width, int height, return 1; } -int DequantizeLevels(uint8_t* const data, int width, int height) { - if (data == NULL || width <= 0 || height <= 0) return 0; - // TODO(skal): implement gradient smoothing. - (void)data; - (void)width; - (void)height; - return 1; -} - #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif diff --git a/third_party/libwebp/utils/quant_levels.h b/third_party/libwebp/utils/quant_levels.h index 89ccafe..9f85f34 100644 --- a/third_party/libwebp/utils/quant_levels.h +++ b/third_party/libwebp/utils/quant_levels.h @@ -27,11 +27,6 @@ extern "C" { int QuantizeLevels(uint8_t* const data, int width, int height, int num_levels, uint64_t* const sse); -// Apply post-processing to input 'data' of size 'width'x'height' assuming -// that the source was quantized to a reduced number of levels. -// Returns false in case of error (data is NULL, invalid parameters, ...). -int DequantizeLevels(uint8_t* const data, int width, int height); - #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif diff --git a/third_party/libwebp/utils/quant_levels_dec.c b/third_party/libwebp/utils/quant_levels_dec.c new file mode 100644 index 0000000..95142b1 --- /dev/null +++ b/third_party/libwebp/utils/quant_levels_dec.c @@ -0,0 +1,28 @@ +// Copyright 2013 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/ +// ----------------------------------------------------------------------------- +// +// TODO(skal): implement gradient smoothing. +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "./quant_levels_dec.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +int DequantizeLevels(uint8_t* const data, int width, int height) { + if (data == NULL || width <= 0 || height <= 0) return 0; + (void)data; + (void)width; + (void)height; + return 1; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif diff --git a/third_party/libwebp/utils/quant_levels_dec.h b/third_party/libwebp/utils/quant_levels_dec.h new file mode 100644 index 0000000..470cf47 --- /dev/null +++ b/third_party/libwebp/utils/quant_levels_dec.h @@ -0,0 +1,30 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// Alpha plane 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" + +#if defined(__cplusplus) || defined(c_plusplus) +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. +// Returns false in case of error (data is NULL, invalid parameters, ...). +int DequantizeLevels(uint8_t* const data, int width, int height); + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_UTILS_QUANT_LEVELS_DEC_H_ */ diff --git a/third_party/libwebp/utils/thread.c b/third_party/libwebp/utils/thread.c index ce89cf9..a14af55 100644 --- a/third_party/libwebp/utils/thread.c +++ b/third_party/libwebp/utils/thread.c @@ -9,10 +9,6 @@ // // Author: Skal (pascal.massimino@gmail.com) -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - #include <assert.h> #include <string.h> // for memset() #include "./thread.h" diff --git a/third_party/libwebp/utils/thread.h b/third_party/libwebp/utils/thread.h index 3191890b..9afe096 100644 --- a/third_party/libwebp/utils/thread.h +++ b/third_party/libwebp/utils/thread.h @@ -12,6 +12,10 @@ #ifndef WEBP_UTILS_THREAD_H_ #define WEBP_UTILS_THREAD_H_ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + #if defined(__cplusplus) || defined(c_plusplus) extern "C" { #endif @@ -63,13 +67,13 @@ typedef struct { // Must be called first, before any other method. void WebPWorkerInit(WebPWorker* const worker); -// Must be called initialize the object and spawn the thread. Re-entrant. +// 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 WebPWorkerReset(WebPWorker* const worker); -// Make sure the previous work is finished. Returns true if worker->had_error -// was not set and not error condition was triggered by the working thread. +// 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 WebPWorkerSync(WebPWorker* const worker); -// Trigger the thread to call hook() with data1 and data2 argument. These +// Triggers the thread to call hook() with data1 and data2 argument. These // hook/data1/data2 can be changed at any time before calling this function, // but not be changed afterward until the next call to WebPWorkerSync(). void WebPWorkerLaunch(WebPWorker* const worker); diff --git a/third_party/libwebp/utils/utils.c b/third_party/libwebp/utils/utils.c index 673b7e2..b1db2f9 100644 --- a/third_party/libwebp/utils/utils.c +++ b/third_party/libwebp/utils/utils.c @@ -19,7 +19,8 @@ extern "C" { //------------------------------------------------------------------------------ // Checked memory allocation -static int CheckSizeArguments(uint64_t nmemb, size_t size) { +// 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; @@ -28,12 +29,14 @@ static int CheckSizeArguments(uint64_t nmemb, size_t size) { } void* WebPSafeMalloc(uint64_t nmemb, size_t size) { - if (!CheckSizeArguments(nmemb, size)) return NULL; + if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; + assert(nmemb * size > 0); return malloc((size_t)(nmemb * size)); } void* WebPSafeCalloc(uint64_t nmemb, size_t size) { - if (!CheckSizeArguments(nmemb, size)) return NULL; + if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; + assert(nmemb * size > 0); return calloc((size_t)nmemb, size); } diff --git a/third_party/libwebp/utils/utils.h b/third_party/libwebp/utils/utils.h index a034762..e5d6d63 100644 --- a/third_party/libwebp/utils/utils.h +++ b/third_party/libwebp/utils/utils.h @@ -7,11 +7,14 @@ // // Misc. common utility functions // -// Author: Skal (pascal.massimino@gmail.com) +// Authors: Skal (pascal.massimino@gmail.com) +// Urvang (urvang@google.com) #ifndef WEBP_UTILS_UTILS_H_ #define WEBP_UTILS_UTILS_H_ +#include <assert.h> + #include "../webp/types.h" #if defined(__cplusplus) || defined(c_plusplus) @@ -36,6 +39,40 @@ void* WebPSafeMalloc(uint64_t nmemb, size_t size); void* WebPSafeCalloc(uint64_t nmemb, size_t size); //------------------------------------------------------------------------------ +// 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 (uint32_t)GetLE16(data) | (GetLE16(data + 2) << 16); +} + +// Store 16, 24 or 32 bits in little-endian order. +static WEBP_INLINE void PutLE16(uint8_t* const data, int val) { + assert(val < (1 << 16)); + data[0] = (val >> 0); + data[1] = (val >> 8); +} + +static WEBP_INLINE void PutLE24(uint8_t* const data, int val) { + assert(val < (1 << 24)); + PutLE16(data, val & 0xffff); + data[2] = (val >> 16); +} + +static WEBP_INLINE void PutLE32(uint8_t* const data, uint32_t val) { + PutLE16(data, (int)(val & 0xffff)); + PutLE16(data + 2, (int)(val >> 16)); +} + +//------------------------------------------------------------------------------ #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" diff --git a/third_party/libwebp/webp/decode.h b/third_party/libwebp/webp/decode.h index 43b6c58..181eb18 100644 --- a/third_party/libwebp/webp/decode.h +++ b/third_party/libwebp/webp/decode.h @@ -18,7 +18,19 @@ extern "C" { #endif -#define WEBP_DECODER_ABI_VERSION 0x0200 // MAJOR(8b) + MINOR(8b) +#define WEBP_DECODER_ABI_VERSION 0x0201 // MAJOR(8b) + MINOR(8b) + +typedef struct WebPRGBABuffer WebPRGBABuffer; +typedef struct WebPYUVABuffer WebPYUVABuffer; +typedef struct WebPDecBuffer WebPDecBuffer; +#if !(defined(__cplusplus) || defined(c_plusplus)) +typedef enum VP8StatusCode VP8StatusCode; +typedef enum WEBP_CSP_MODE WEBP_CSP_MODE; +#endif +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. @@ -118,20 +130,28 @@ WEBP_EXTERN(uint8_t*) WebPDecodeYUVInto( // Note: the naming describes the byte-ordering of packed samples in memory. // For instance, MODE_BGRA relates to samples ordered as B,G,R,A,B,G,R,A,... // Non-capital names (e.g.:MODE_Argb) relates to pre-multiplied RGB channels. -// RGB-565 and RGBA-4444 are also endian-agnostic and byte-oriented. -typedef enum { MODE_RGB = 0, MODE_RGBA = 1, - MODE_BGR = 2, MODE_BGRA = 3, - MODE_ARGB = 4, MODE_RGBA_4444 = 5, - MODE_RGB_565 = 6, - // RGB-premultiplied transparent modes (alpha value is preserved) - MODE_rgbA = 7, - MODE_bgrA = 8, - MODE_Argb = 9, - MODE_rgbA_4444 = 10, - // YUV modes must come after RGB ones. - MODE_YUV = 11, MODE_YUVA = 12, // yuv 4:2:0 - MODE_LAST = 13 - } WEBP_CSP_MODE; +// RGBA-4444 and RGB-565 colorspaces are represented by following byte-order: +// RGBA-4444: [r3 r2 r1 r0 g3 g2 g1 g0], [b3 b2 b1 b0 a3 a2 a1 a0], ... +// RGB-565: [r4 r3 r2 r1 r0 g5 g4 g3], [g2 g1 g0 b4 b3 b2 b1 b0], ... +// In the case WEBP_SWAP_16BITS_CSP is defined, the bytes are swapped for +// these two modes: +// RGBA-4444: [b3 b2 b1 b0 a3 a2 a1 a0], [r3 r2 r1 r0 g3 g2 g1 g0], ... +// RGB-565: [g2 g1 g0 b4 b3 b2 b1 b0], [r4 r3 r2 r1 r0 g5 g4 g3], ... + +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 +}; // Some useful macros: static WEBP_INLINE int WebPIsPremultipliedMode(WEBP_CSP_MODE mode) { @@ -152,13 +172,13 @@ static WEBP_INLINE int WebPIsRGBMode(WEBP_CSP_MODE mode) { //------------------------------------------------------------------------------ // WebPDecBuffer: Generic structure for describing the output sample buffer. -typedef struct { // view as RGBA +struct WebPRGBABuffer { // view as RGBA uint8_t* rgba; // pointer to RGBA samples int stride; // stride in bytes from one scanline to the next. size_t size; // total size of the *rgba buffer. -} WebPRGBABuffer; +}; -typedef struct { // view as YUVA +struct WebPYUVABuffer { // view as YUVA uint8_t* y, *u, *v, *a; // pointer to luma, chroma U/V, alpha samples int y_stride; // luma stride int u_stride, v_stride; // chroma strides @@ -166,10 +186,10 @@ typedef struct { // view as YUVA size_t y_size; // luma plane size size_t u_size, v_size; // chroma planes size size_t a_size; // alpha-plane size -} WebPYUVABuffer; +}; // Output buffer -typedef struct { +struct WebPDecBuffer { WEBP_CSP_MODE colorspace; // Colorspace. int width, height; // Dimensions. int is_external_memory; // If true, 'internal_memory' pointer is not used. @@ -182,7 +202,7 @@ typedef struct { uint8_t* private_memory; // Internally allocated memory (only when // is_external_memory is false). Should not be used // externally, but accessed via the buffer union. -} WebPDecBuffer; +}; // Internal, version-checked, entry point WEBP_EXTERN(int) WebPInitDecBufferInternal(WebPDecBuffer*, int); @@ -200,7 +220,7 @@ WEBP_EXTERN(void) WebPFreeDecBuffer(WebPDecBuffer* buffer); //------------------------------------------------------------------------------ // Enumeration of the status codes -typedef enum { +enum VP8StatusCode { VP8_STATUS_OK = 0, VP8_STATUS_OUT_OF_MEMORY, VP8_STATUS_INVALID_PARAM, @@ -209,7 +229,7 @@ typedef enum { VP8_STATUS_SUSPENDED, VP8_STATUS_USER_ABORT, VP8_STATUS_NOT_ENOUGH_DATA -} VP8StatusCode; +}; //------------------------------------------------------------------------------ // Incremental decoding @@ -237,8 +257,6 @@ typedef enum { // } // WebPIDelete(idec); -typedef struct WebPIDecoder WebPIDecoder; - // Creates a new incremental decoder with the supplied buffer parameter. // This output_buffer can be passed NULL, in which case a default output buffer // is used (with MODE_RGB). Otherwise, an internal reference to 'output_buffer' @@ -251,19 +269,27 @@ WEBP_EXTERN(WebPIDecoder*) WebPINewDecoder(WebPDecBuffer* output_buffer); // will output the RGB/A samples specified by 'csp' into a preallocated // buffer 'output_buffer'. The size of this buffer is at least // 'output_buffer_size' and the stride (distance in bytes between two scanlines) -// is specified by 'output_stride'. Returns NULL if the allocation failed. +// is specified by 'output_stride'. +// Additionally, output_buffer can be passed NULL in which case the output +// buffer will be allocated automatically when the decoding starts. The +// colorspace 'csp' is taken into account for allocating this buffer. All other +// parameters are ignored. +// Returns NULL if the allocation failed, or if some parameters are invalid. WEBP_EXTERN(WebPIDecoder*) WebPINewRGB( WEBP_CSP_MODE csp, uint8_t* output_buffer, size_t output_buffer_size, int output_stride); // This function allocates and initializes an incremental-decoder object, which -// will output the raw luma/chroma samples into a preallocated planes. The luma -// plane is specified by its pointer 'luma', its size 'luma_size' and its stride -// 'luma_stride'. Similarly, the chroma-u plane is specified by the 'u', -// 'u_size' and 'u_stride' parameters, and the chroma-v plane by 'v' -// and 'v_size'. And same for the alpha-plane. The 'a' pointer can be pass -// NULL in case one is not interested in the transparency plane. -// Returns NULL if the allocation failed. +// will output the raw luma/chroma samples into a preallocated planes if +// supplied. The luma plane is specified by its pointer 'luma', its size +// 'luma_size' and its stride 'luma_stride'. Similarly, the chroma-u plane +// is specified by the 'u', 'u_size' and 'u_stride' parameters, and the chroma-v +// plane by 'v' and 'v_size'. And same for the alpha-plane. The 'a' pointer +// can be pass NULL in case one is not interested in the transparency plane. +// Conversely, 'luma' can be passed NULL if no preallocated planes are supplied. +// In this case, the output buffer will be automatically allocated (using +// MODE_YUVA) when decoding starts. All parameters are then ignored. +// Returns NULL if the allocation failed or if a parameter is invalid. WEBP_EXTERN(WebPIDecoder*) WebPINewYUVA( uint8_t* luma, size_t luma_size, int luma_stride, uint8_t* u, size_t u_size, int u_stride, @@ -344,7 +370,7 @@ WEBP_EXTERN(const WebPDecBuffer*) WebPIDecodedArea( CHECK(WebPGetFeatures(data, data_size, &config.input) == VP8_STATUS_OK); // C) Adjust 'config', if needed - config.no_fancy = 1; + config.no_fancy_upsampling = 1; config.output.colorspace = MODE_BGRA; // etc. @@ -365,10 +391,11 @@ WEBP_EXTERN(const WebPDecBuffer*) WebPIDecodedArea( */ // Features gathered from the bitstream -typedef struct { - int width; // Width in pixels, as read from the bitstream. - int height; // Height in pixels, as read from the bitstream. - int has_alpha; // True if the bitstream contains an alpha channel. +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. // Unused for now: int bitstream_version; // should be 0 for now. TODO(later) @@ -376,8 +403,8 @@ typedef struct { // recommended. int rotate; // TODO(later) int uv_sampling; // should be 0 for now. TODO(later) - uint32_t pad[3]; // padding for later use -} WebPBitstreamFeatures; + uint32_t pad[2]; // padding for later use +}; // Internal, version-checked, entry point WEBP_EXTERN(VP8StatusCode) WebPGetFeaturesInternal( @@ -385,8 +412,9 @@ WEBP_EXTERN(VP8StatusCode) WebPGetFeaturesInternal( // Retrieve features from the bitstream. The *features structure is filled // with information gathered from the bitstream. -// Returns false in case of error or version mismatch. -// In case of error, features->bitstream_status will reflect the error code. +// Returns VP8_STATUS_OK when the features are successfully retrieved. Returns +// VP8_STATUS_NOT_ENOUGH_DATA when more data is needed to retrieve the +// features from headers. Returns error in other cases. static WEBP_INLINE VP8StatusCode WebPGetFeatures( const uint8_t* data, size_t data_size, WebPBitstreamFeatures* features) { @@ -395,7 +423,7 @@ static WEBP_INLINE VP8StatusCode WebPGetFeatures( } // Decoding options -typedef struct { +struct WebPDecoderOptions { int bypass_filtering; // if true, skip the in-loop filtering int no_fancy_upsampling; // if true, use faster pointwise upsampler int use_cropping; // if true, cropping is applied _first_ @@ -410,14 +438,14 @@ typedef struct { int force_rotation; // forced rotation (to be applied _last_) int no_enhancement; // if true, discard enhancement layer uint32_t pad[6]; // padding for later use -} WebPDecoderOptions; +}; // Main object storing the configuration for advanced decoding. -typedef struct { +struct WebPDecoderConfig { WebPBitstreamFeatures input; // Immutable bitstream features (optional) WebPDecBuffer output; // Output buffer (can point to external mem) WebPDecoderOptions options; // Decoding options -} WebPDecoderConfig; +}; // Internal, version-checked, entry point WEBP_EXTERN(int) WebPInitDecoderConfigInternal(WebPDecoderConfig*, int); diff --git a/third_party/libwebp/webp/demux.h b/third_party/libwebp/webp/demux.h new file mode 100644 index 0000000..cfb4fdf --- /dev/null +++ b/third_party/libwebp/webp/demux.h @@ -0,0 +1,212 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// 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 "./mux_types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define WEBP_DEMUX_ABI_VERSION 0x0100 // MAJOR(8b) + MINOR(8b) + +typedef struct WebPDemuxer WebPDemuxer; +#if !(defined(__cplusplus) || defined(c_plusplus)) +typedef enum WebPDemuxState WebPDemuxState; +typedef enum WebPFormatFeature WebPFormatFeature; +#endif +typedef struct WebPIterator WebPIterator; +typedef struct WebPChunkIterator WebPChunkIterator; + +//------------------------------------------------------------------------------ + +// 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 + +enum WebPDemuxState { + WEBP_DEMUX_PARSING_HEADER, // Not enough data to parse full header. + WEBP_DEMUX_PARSED_HEADER, // Header parsing complete, data may be available. + WEBP_DEMUX_DONE // Entire file has been parsed. +}; + +// Internal, version-checked, entry point +WEBP_EXTERN(WebPDemuxer*) WebPDemuxInternal( + const WebPData*, int, WebPDemuxState*, int); + +// Parses the full WebP file given by 'data'. +// 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 a WebPDemuxer object on successful parse, NULL otherwise. +static WEBP_INLINE WebPDemuxer* WebPDemuxPartial( + const WebPData* data, WebPDemuxState* state) { + return WebPDemuxInternal(data, 1, state, WEBP_DEMUX_ABI_VERSION); +} + +// Frees memory associated with 'dmux'. +WEBP_EXTERN(void) WebPDemuxDelete(WebPDemuxer* dmux); + +//------------------------------------------------------------------------------ +// Data/information extraction. + +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. +}; + +// 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 fragment_num; + int num_fragments; + int x_offset, y_offset; // offset relative to the canvas. + int width, height; // dimensions of this frame or fragment. + 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 or fragment given by 'frame_num' and + // 'fragment_num'. + + uint32_t pad[4]; // padding for later use. + void* private_; // for internal use only. +}; + +// Retrieves frame 'frame_number' from 'dmux'. +// 'iter->fragment' points to the first fragment on return from this function. +// Individual fragments may be extracted using WebPDemuxSetFragment(). +// 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); + +// Sets 'iter->fragment' to reflect fragment number 'fragment_num'. +// Returns true if fragment 'fragment_num' is present, false otherwise. +WEBP_EXTERN(int) WebPDemuxSelectFragment(WebPIterator* iter, int fragment_num); + +// 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); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_WEBP_DEMUX_H_ */ diff --git a/third_party/libwebp/webp/encode.h b/third_party/libwebp/webp/encode.h index 2e37cfa..423622bd 100644 --- a/third_party/libwebp/webp/encode.h +++ b/third_party/libwebp/webp/encode.h @@ -18,7 +18,18 @@ extern "C" { #endif -#define WEBP_ENCODER_ABI_VERSION 0x0200 // MAJOR(8b) + MINOR(8b) +#define WEBP_ENCODER_ABI_VERSION 0x0201 // MAJOR(8b) + MINOR(8b) + +#if !(defined(__cplusplus) || defined(c_plusplus)) +typedef enum WebPImageHint WebPImageHint; +typedef enum WebPEncCSP WebPEncCSP; +typedef enum WebPPreset WebPPreset; +typedef enum WebPEncodingError WebPEncodingError; +#endif +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. @@ -66,15 +77,16 @@ WEBP_EXTERN(size_t) WebPEncodeLosslessBGRA(const uint8_t* bgra, // Coding parameters // Image characteristics hint for the underlying encoder. -typedef enum { +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; +}; -typedef struct { +// Compression parameters. +struct WebPConfig { int lossless; // Lossless encoding (0=lossy(default), 1=lossless). float quality; // between 0 (smallest file) and 100 (biggest) int method; // quality/speed trade-off (0=fast, 6=slower-better) @@ -109,20 +121,26 @@ typedef struct { int partition_limit; // quality degradation allowed to fit the 512k limit // on prediction modes coding (0: no degradation, // 100: maximum possible degradation). - - uint32_t pad[8]; // padding for later use -} WebPConfig; + int emulate_jpeg_size; // If true, compression parameters will be remapped + // to better match the expected output size from + // JPEG compression. Generally, the output size will + // be similar but the degradation will be lower. + int thread_level; // If non-zero, try and use multi-threaded encoding. + int low_memory; // If set, reduce memory usage (but increase CPU use). + + uint32_t pad[5]; // padding for later use +}; // Enumerate some predefined settings for WebPConfig, depending on the type // of source picture. These presets are used when calling WebPConfigPreset(). -typedef enum { +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); @@ -152,11 +170,9 @@ WEBP_EXTERN(int) WebPValidateConfig(const WebPConfig* config); //------------------------------------------------------------------------------ // Input / Output - -typedef struct WebPPicture WebPPicture; // main structure for I/O - // Structure for storing auxiliary statistics (mostly for lossy encoding). -typedef struct { + +struct WebPAuxStats { int coded_size; // final size float PSNR[5]; // peak-signal-to-noise ratio for Y/U/V/All/Alpha @@ -182,7 +198,7 @@ typedef struct { int lossless_size; // final lossless size uint32_t pad[4]; // padding for later use -} WebPAuxStats; +}; // Signature for output function. Should return true if writing was successful. // data/data_size is the segment of data to write, and 'picture' is for @@ -192,18 +208,19 @@ typedef int (*WebPWriterFunction)(const uint8_t* data, size_t data_size, // WebPMemoryWrite: a special WebPWriterFunction that writes to memory using // the following WebPMemoryWriter object (to be set as a custom_ptr). -typedef struct { +struct WebPMemoryWriter { uint8_t* mem; // final buffer (of size 'max_size', larger than 'size'). size_t size; // final size size_t max_size; // total capacity uint32_t pad[1]; // padding for later use -} WebPMemoryWriter; +}; // The following must be called first before any use. WEBP_EXTERN(void) WebPMemoryWriterInit(WebPMemoryWriter* writer); // The 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 using the call 'free(writer.mem)'. WEBP_EXTERN(int) WebPMemoryWrite(const uint8_t* data, size_t data_size, const WebPPicture* picture); @@ -212,7 +229,8 @@ WEBP_EXTERN(int) WebPMemoryWrite(const uint8_t* data, size_t data_size, // everything is OK. typedef int (*WebPProgressHook)(int percent, const WebPPicture* picture); -typedef enum { +// Color spaces. +enum WebPEncCSP { // chroma sampling WEBP_YUV420 = 0, // 4:2:0 WEBP_YUV422 = 1, // 4:2:2 @@ -225,10 +243,10 @@ typedef enum { WEBP_YUV444A = 6, WEBP_YUV400A = 7, // grayscale + alpha WEBP_CSP_ALPHA_BIT = 4 // bit that is set if alpha is present -} WebPEncCSP; +}; // Encoding error conditions. -typedef enum { +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 @@ -241,7 +259,7 @@ typedef enum { 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 @@ -348,13 +366,13 @@ WEBP_EXTERN(void) WebPPictureFree(WebPPicture* picture); // Returns false in case of memory allocation error. WEBP_EXTERN(int) WebPPictureCopy(const WebPPicture* src, WebPPicture* dst); -// Compute PSNR or SSIM distortion between two pictures. +// Compute PSNR, SSIM or LSIM distortion metric between two pictures. // Result is in dB, stores in result[] in the Y/U/V/Alpha/All order. -// Returns false in case of error (pic1 and pic2 don't have same dimension, ...) +// Returns false in case of error (src and ref don't have same dimension, ...) // Warning: this function is rather CPU-intensive. WEBP_EXTERN(int) WebPPictureDistortion( - const WebPPicture* pic1, const WebPPicture* pic2, - int metric_type, // 0 = PSNR, 1 = SSIM + const WebPPicture* src, const WebPPicture* ref, + int metric_type, // 0 = PSNR, 1 = SSIM, 2 = LSIM float result[5]); // self-crops a picture to the rectangle defined by top/left/width/height. diff --git a/third_party/libwebp/webp/format_constants.h b/third_party/libwebp/webp/format_constants.h index 7ce498f..8b3d677 100644 --- a/third_party/libwebp/webp/format_constants.h +++ b/third_party/libwebp/webp/format_constants.h @@ -12,6 +12,9 @@ #ifndef WEBP_WEBP_FORMAT_CONSTANTS_H_ #define WEBP_WEBP_FORMAT_CONSTANTS_H_ +// Create fourcc of the chunk from the chunk tag characters. +#define MKFOURCC(a, b, c, d) ((uint32_t)(a) | (b) << 8 | (c) << 16 | (d) << 24) + // VP8 related constants. #define VP8_SIGNATURE 0x9d012a // Signature in VP8 data. #define VP8_MAX_PARTITION0_SIZE (1 << 19) // max size of mode partition @@ -65,23 +68,16 @@ typedef enum { #define CHUNK_SIZE_BYTES 4 // Size needed to store chunk's size. #define CHUNK_HEADER_SIZE 8 // Size of a chunk header. #define RIFF_HEADER_SIZE 12 // Size of the RIFF header ("RIFFnnnnWEBP"). -#define FRAME_CHUNK_SIZE 15 // Size of a FRM chunk. -#define LOOP_CHUNK_SIZE 2 // Size of a LOOP chunk. -#define TILE_CHUNK_SIZE 6 // Size of a TILE chunk. +#define ANMF_CHUNK_SIZE 16 // Size of an ANMF chunk. +#define ANIM_CHUNK_SIZE 6 // Size of an ANIM chunk. +#define FRGM_CHUNK_SIZE 6 // Size of a FRGM chunk. #define VP8X_CHUNK_SIZE 10 // Size of a VP8X chunk. -#define TILING_FLAG_BIT 0x01 // Set if tiles are possibly used. -#define ANIMATION_FLAG_BIT 0x02 // Set if some animation is expected -#define ICC_FLAG_BIT 0x04 // Whether ICC is present or not. -#define METADATA_FLAG_BIT 0x08 // Set if some META chunk is possibly present. -#define ALPHA_FLAG_BIT 0x10 // Should be same as the ALPHA_FLAG in mux.h -#define ROTATION_FLAG_BITS 0xe0 // all 3 bits for rotation + symmetry - #define MAX_CANVAS_SIZE (1 << 24) // 24-bit max for VP8X width/height. #define MAX_IMAGE_AREA (1ULL << 32) // 32-bit max for width x height. #define MAX_LOOP_COUNT (1 << 16) // maximum value for loop-count #define MAX_DURATION (1 << 24) // maximum duration -#define MAX_POSITION_OFFSET (1 << 24) // maximum frame/tile x/y offset +#define MAX_POSITION_OFFSET (1 << 24) // maximum frame/fragment x/y offset // Maximum chunk payload is such that adding the header and padding won't // overflow a uint32_t. diff --git a/third_party/libwebp/webp/mux.h b/third_party/libwebp/webp/mux.h new file mode 100644 index 0000000..85a8922 --- /dev/null +++ b/third_party/libwebp/webp/mux.h @@ -0,0 +1,355 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// RIFF container manipulation for WEBP images. +// +// Authors: Urvang (urvang@google.com) +// Vikas (vikasa@google.com) + +// This API allows manipulation of WebP container images containing features +// like color profile, metadata, animation and fragmented images. +// +// Code Example#1: Creating a MUX with image data, color profile and XMP +// metadata. +// +// int copy_data = 0; +// WebPMux* mux = WebPMuxNew(); +// // ... (Prepare image data). +// WebPMuxSetImage(mux, &image, copy_data); +// // ... (Prepare ICCP color profile data). +// 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); + +#ifndef WEBP_WEBP_MUX_H_ +#define WEBP_WEBP_MUX_H_ + +#include "./mux_types.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define WEBP_MUX_ABI_VERSION 0x0100 // MAJOR(8b) + MINOR(8b) + +typedef struct WebPMux WebPMux; // main opaque object. +#if !(defined(__cplusplus) || defined(c_plusplus)) +typedef enum WebPMuxError WebPMuxError; +typedef enum WebPChunkId WebPChunkId; +#endif +typedef struct WebPMuxFrameInfo WebPMuxFrameInfo; +typedef struct WebPMuxAnimParams WebPMuxAnimParams; + +// Error codes +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 +}; + +// IDs for different types of chunks. +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 +}; + +//------------------------------------------------------------------------------ + +// Returns the version number of the mux library, packed in hexadecimal using +// 8bits or 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. +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 +// 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 APIs 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 +// 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 either 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 either 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. + uint32_t pad[2]; // 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 either 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 +// 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 +// 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_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 either 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 either of 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. + +// Gets the feature flags from the mux object. +// Parameters: +// mux - (in) object from which the features are to be fetched +// flags - (out) the flags specifying which features are present in the +// mux object. This will be an OR of various flag values. +// Enum 'WebPFeatureFlags' can be used to test individual flag values. +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if mux or flags is NULL +// WEBP_MUX_NOT_FOUND - if VP8X chunk is not present in mux object. +// WEBP_MUX_BAD_DATA - if VP8X chunk in mux is invalid. +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxGetFeatures(const WebPMux* mux, + uint32_t* flags); + +// Gets number of chunks having tag value tag in the mux object. +// Parameters: +// mux - (in) object from which the info is to be fetched +// id - (in) chunk id specifying the type of chunk +// num_elements - (out) number of chunks with the given chunk id +// Returns: +// WEBP_MUX_INVALID_ARGUMENT - if either mux, or num_elements is NULL +// WEBP_MUX_OK - on success. +WEBP_EXTERN(WebPMuxError) WebPMuxNumChunks(const WebPMux* mux, + WebPChunkId id, int* num_elements); + +// Assembles all chunks in WebP RIFF format and returns in 'assembled_data'. +// This function also validates the mux object. +// Note: The content of 'assembled_data' will be ignored and overwritten. +// Also, the content of 'assembled_data' is allocated using malloc(), and NOT +// owned by the 'mux' object. It MUST be deallocated by the caller by calling +// WebPDataClear(). +// Parameters: +// mux - (in/out) object whose chunks are to be assembled +// assembled_data - (out) assembled WebP data +// Returns: +// WEBP_MUX_BAD_DATA - if mux object is invalid. +// WEBP_MUX_INVALID_ARGUMENT - if either mux, output_data or output_size is +// NULL. +// WEBP_MUX_MEMORY_ERROR - on memory allocation error. +// WEBP_MUX_OK - on success +WEBP_EXTERN(WebPMuxError) WebPMuxAssemble(WebPMux* mux, + WebPData* assembled_data); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_WEBP_MUX_H_ */ diff --git a/third_party/libwebp/webp/mux_types.h b/third_party/libwebp/webp/mux_types.h new file mode 100644 index 0000000..4006a54 --- /dev/null +++ b/third_party/libwebp/webp/mux_types.h @@ -0,0 +1,87 @@ +// Copyright 2012 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// 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" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if !(defined(__cplusplus) || defined(c_plusplus)) +typedef enum WebPFeatureFlags WebPFeatureFlags; +typedef enum WebPMuxAnimDispose WebPMuxAnimDispose; +#endif + +// VP8X Feature Flags. +enum WebPFeatureFlags { + FRAGMENTS_FLAG = 0x00000001, + ANIMATION_FLAG = 0x00000002, + XMP_FLAG = 0x00000004, + EXIF_FLAG = 0x00000008, + ALPHA_FLAG = 0x00000010, + ICCP_FLAG = 0x00000020 +}; + +// 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. +enum WebPMuxAnimDispose { + WEBP_MUX_DISPOSE_NONE, // Do not dispose. + WEBP_MUX_DISPOSE_BACKGROUND // Dispose to background color. +}; + +// Data type used to describe 'raw' data, e.g., chunk data +// (ICC profile, metadata) and WebP compressed image data. +typedef struct WebPData WebPData; +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; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* WEBP_WEBP_MUX_TYPES_H_ */ diff --git a/webkit/tools/layout_tests/test_expectations.txt b/webkit/tools/layout_tests/test_expectations.txt index dc5ee63..61974e7 100644 --- a/webkit/tools/layout_tests/test_expectations.txt +++ b/webkit/tools/layout_tests/test_expectations.txt @@ -31,3 +31,5 @@ # Right?) # # EVERYTHING BELOW THIS LINE WILL BE DELETED AT EVERY WEBKIT DEPS ROLL +webkit.org/b/93310 fast/canvas/canvas-toDataURL-webp.html [ ImageOnlyFailure Pass ] +webkit.org/b/93310 platform/chromium/virtual/gpu/fast/canvas/canvas-toDataURL-webp.html [ ImageOnlyFailure Pass ] |