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- // Copyright 2015 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- //
- // This file contains an implementation of a VP8 raw stream parser,
- // as defined in RFC 6386.
- #include "media/parsers/vp8_parser.h"
- #include <cstring>
- #include "base/check_op.h"
- #include "base/logging.h"
- namespace media {
- #define ERROR_RETURN(what) \
- do { \
- DVLOG(1) << "Error while trying to read " #what; \
- return false; \
- } while (0)
- #define BD_READ_BOOL_OR_RETURN(out) \
- do { \
- if (!bd_.ReadBool(out)) \
- ERROR_RETURN(out); \
- } while (0)
- #define BD_READ_BOOL_WITH_PROB_OR_RETURN(out, prob) \
- do { \
- if (!bd_.ReadBool(out, prob)) \
- ERROR_RETURN(out); \
- } while (0)
- #define BD_READ_UNSIGNED_OR_RETURN(num_bits, out) \
- do { \
- int _out; \
- if (!bd_.ReadLiteral(num_bits, &_out)) \
- ERROR_RETURN(out); \
- *out = _out; \
- } while (0)
- #define BD_READ_SIGNED_OR_RETURN(num_bits, out) \
- do { \
- int _out; \
- if (!bd_.ReadLiteralWithSign(num_bits, &_out)) \
- ERROR_RETURN(out); \
- *out = _out; \
- } while (0)
- Vp8FrameHeader::Vp8FrameHeader() {
- memset(this, 0, sizeof(*this));
- }
- Vp8FrameHeader::~Vp8FrameHeader() = default;
- Vp8FrameHeader::Vp8FrameHeader(const Vp8FrameHeader& fhdr) {
- memcpy(this, &fhdr, sizeof(*this));
- }
- Vp8FrameHeader& Vp8FrameHeader::operator=(const Vp8FrameHeader& fhdr) {
- memcpy(this, &fhdr, sizeof(*this));
- return *this;
- }
- Vp8Parser::Vp8Parser() : stream_(nullptr), bytes_left_(0) {
- }
- Vp8Parser::~Vp8Parser() = default;
- bool Vp8Parser::ParseFrame(const uint8_t* ptr,
- size_t frame_size,
- Vp8FrameHeader* fhdr) {
- stream_ = ptr;
- bytes_left_ = frame_size;
- memset(fhdr, 0, sizeof(*fhdr));
- fhdr->data = stream_;
- fhdr->frame_size = bytes_left_;
- if (!ParseFrameTag(fhdr))
- return false;
- fhdr->first_part_offset = stream_ - fhdr->data;
- if (!ParseFrameHeader(fhdr))
- return false;
- if (!ParsePartitions(fhdr))
- return false;
- DVLOG(4) << "Frame parsed, start: " << static_cast<const void*>(ptr)
- << ", size: " << frame_size
- << ", offsets: to first_part=" << fhdr->first_part_offset
- << ", to macroblock data (in bits)=" << fhdr->macroblock_bit_offset;
- return true;
- }
- static inline uint32_t GetBitsAt(uint32_t data, size_t shift, size_t num_bits) {
- return ((data >> shift) & ((1 << num_bits) - 1));
- }
- bool Vp8Parser::ParseFrameTag(Vp8FrameHeader* fhdr) {
- const size_t kFrameTagSize = 3;
- if (bytes_left_ < kFrameTagSize)
- return false;
- uint32_t frame_tag = (stream_[2] << 16) | (stream_[1] << 8) | stream_[0];
- fhdr->frame_type =
- static_cast<Vp8FrameHeader::FrameType>(GetBitsAt(frame_tag, 0, 1));
- fhdr->version = GetBitsAt(frame_tag, 1, 2);
- fhdr->is_experimental = !!GetBitsAt(frame_tag, 3, 1);
- fhdr->show_frame =!!GetBitsAt(frame_tag, 4, 1);
- fhdr->first_part_size = GetBitsAt(frame_tag, 5, 19);
- stream_ += kFrameTagSize;
- bytes_left_ -= kFrameTagSize;
- if (fhdr->IsKeyframe()) {
- const size_t kKeyframeTagSize = 7;
- if (bytes_left_ < kKeyframeTagSize)
- return false;
- static const uint8_t kVp8StartCode[] = {0x9d, 0x01, 0x2a};
- if (memcmp(stream_, kVp8StartCode, sizeof(kVp8StartCode)) != 0)
- return false;
- stream_ += sizeof(kVp8StartCode);
- bytes_left_ -= sizeof(kVp8StartCode);
- uint16_t data = (stream_[1] << 8) | stream_[0];
- fhdr->width = data & 0x3fff;
- fhdr->horizontal_scale = data >> 14;
- data = (stream_[3] << 8) | stream_[2];
- fhdr->height = data & 0x3fff;
- fhdr->vertical_scale = data >> 14;
- stream_ += 4;
- bytes_left_ -= 4;
- }
- return true;
- }
- bool Vp8Parser::ParseFrameHeader(Vp8FrameHeader* fhdr) {
- if (!bd_.Initialize(stream_, bytes_left_))
- return false;
- bool keyframe = fhdr->IsKeyframe();
- if (keyframe) {
- unsigned int data;
- BD_READ_UNSIGNED_OR_RETURN(1, &data); // color_space
- BD_READ_UNSIGNED_OR_RETURN(1, &data); // clamping_type
- fhdr->is_full_range = data == 1;
- } else {
- fhdr->is_full_range = false;
- }
- if (!ParseSegmentationHeader(keyframe))
- return false;
- fhdr->segmentation_hdr = curr_segmentation_hdr_;
- if (!ParseLoopFilterHeader(keyframe))
- return false;
- fhdr->loopfilter_hdr = curr_loopfilter_hdr_;
- int log2_nbr_of_dct_partitions;
- BD_READ_UNSIGNED_OR_RETURN(2, &log2_nbr_of_dct_partitions);
- fhdr->num_of_dct_partitions = static_cast<size_t>(1)
- << log2_nbr_of_dct_partitions;
- if (!ParseQuantizationHeader(&fhdr->quantization_hdr))
- return false;
- if (keyframe) {
- BD_READ_BOOL_OR_RETURN(&fhdr->refresh_entropy_probs);
- } else {
- BD_READ_BOOL_OR_RETURN(&fhdr->refresh_golden_frame);
- BD_READ_BOOL_OR_RETURN(&fhdr->refresh_alternate_frame);
- int refresh_mode;
- if (!fhdr->refresh_golden_frame) {
- BD_READ_UNSIGNED_OR_RETURN(2, &refresh_mode);
- fhdr->copy_buffer_to_golden =
- static_cast<Vp8FrameHeader::GoldenRefreshMode>(refresh_mode);
- }
- if (!fhdr->refresh_alternate_frame) {
- BD_READ_UNSIGNED_OR_RETURN(2, &refresh_mode);
- fhdr->copy_buffer_to_alternate =
- static_cast<Vp8FrameHeader::AltRefreshMode>(refresh_mode);
- }
- BD_READ_UNSIGNED_OR_RETURN(1, &fhdr->sign_bias_golden);
- BD_READ_UNSIGNED_OR_RETURN(1, &fhdr->sign_bias_alternate);
- BD_READ_BOOL_OR_RETURN(&fhdr->refresh_entropy_probs);
- BD_READ_BOOL_OR_RETURN(&fhdr->refresh_last);
- }
- if (keyframe)
- ResetProbs();
- fhdr->entropy_hdr = curr_entropy_hdr_;
- if (!ParseTokenProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs))
- return false;
- BD_READ_BOOL_OR_RETURN(&fhdr->mb_no_skip_coeff);
- if (fhdr->mb_no_skip_coeff)
- BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_skip_false);
- if (!keyframe) {
- BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_intra);
- BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_last);
- BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_gf);
- }
- if (!ParseIntraProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs,
- keyframe))
- return false;
- if (!keyframe) {
- if (!ParseMVProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs))
- return false;
- }
- fhdr->macroblock_bit_offset = bd_.BitOffset();
- fhdr->bool_dec_range = bd_.GetRange();
- fhdr->bool_dec_value = bd_.GetBottom();
- fhdr->bool_dec_count = 7 - (bd_.BitOffset() + 7) % 8;
- return true;
- }
- bool Vp8Parser::ParseSegmentationHeader(bool keyframe) {
- Vp8SegmentationHeader* shdr = &curr_segmentation_hdr_;
- if (keyframe)
- memset(shdr, 0, sizeof(*shdr));
- BD_READ_BOOL_OR_RETURN(&shdr->segmentation_enabled);
- if (!shdr->segmentation_enabled)
- return true;
- BD_READ_BOOL_OR_RETURN(&shdr->update_mb_segmentation_map);
- BD_READ_BOOL_OR_RETURN(&shdr->update_segment_feature_data);
- if (shdr->update_segment_feature_data) {
- int mode;
- BD_READ_UNSIGNED_OR_RETURN(1, &mode);
- shdr->segment_feature_mode =
- static_cast<Vp8SegmentationHeader::SegmentFeatureMode>(mode);
- for (size_t i = 0; i < kMaxMBSegments; ++i) {
- bool quantizer_update;
- BD_READ_BOOL_OR_RETURN(&quantizer_update);
- if (quantizer_update)
- BD_READ_SIGNED_OR_RETURN(7, &shdr->quantizer_update_value[i]);
- else
- shdr->quantizer_update_value[i] = 0;
- }
- for (size_t i = 0; i < kMaxMBSegments; ++i) {
- bool loop_filter_update;
- BD_READ_BOOL_OR_RETURN(&loop_filter_update);
- if (loop_filter_update)
- BD_READ_SIGNED_OR_RETURN(6, &shdr->lf_update_value[i]);
- else
- shdr->lf_update_value[i] = 0;
- }
- }
- if (shdr->update_mb_segmentation_map) {
- for (size_t i = 0; i < kNumMBFeatureTreeProbs; ++i) {
- bool segment_prob_update;
- BD_READ_BOOL_OR_RETURN(&segment_prob_update);
- if (segment_prob_update)
- BD_READ_UNSIGNED_OR_RETURN(8, &shdr->segment_prob[i]);
- else
- shdr->segment_prob[i] = Vp8SegmentationHeader::kDefaultSegmentProb;
- }
- }
- return true;
- }
- bool Vp8Parser::ParseLoopFilterHeader(bool keyframe) {
- Vp8LoopFilterHeader* lfhdr = &curr_loopfilter_hdr_;
- if (keyframe)
- memset(lfhdr, 0, sizeof(*lfhdr));
- int type;
- BD_READ_UNSIGNED_OR_RETURN(1, &type);
- lfhdr->type = static_cast<Vp8LoopFilterHeader::Type>(type);
- BD_READ_UNSIGNED_OR_RETURN(6, &lfhdr->level);
- BD_READ_UNSIGNED_OR_RETURN(3, &lfhdr->sharpness_level);
- BD_READ_BOOL_OR_RETURN(&lfhdr->loop_filter_adj_enable);
- if (lfhdr->loop_filter_adj_enable) {
- BD_READ_BOOL_OR_RETURN(&lfhdr->mode_ref_lf_delta_update);
- if (lfhdr->mode_ref_lf_delta_update) {
- for (size_t i = 0; i < kNumBlockContexts; ++i) {
- bool ref_frame_delta_update_flag;
- BD_READ_BOOL_OR_RETURN(&ref_frame_delta_update_flag);
- if (ref_frame_delta_update_flag)
- BD_READ_SIGNED_OR_RETURN(6, &lfhdr->ref_frame_delta[i]);
- }
- for (size_t i = 0; i < kNumBlockContexts; ++i) {
- bool mb_mode_delta_update_flag;
- BD_READ_BOOL_OR_RETURN(&mb_mode_delta_update_flag);
- if (mb_mode_delta_update_flag)
- BD_READ_SIGNED_OR_RETURN(6, &lfhdr->mb_mode_delta[i]);
- }
- }
- }
- return true;
- }
- bool Vp8Parser::ParseQuantizationHeader(Vp8QuantizationHeader* qhdr) {
- // If any of the delta values is not present, the delta should be zero.
- memset(qhdr, 0, sizeof(*qhdr));
- BD_READ_UNSIGNED_OR_RETURN(7, &qhdr->y_ac_qi);
- bool delta_present;
- BD_READ_BOOL_OR_RETURN(&delta_present);
- if (delta_present)
- BD_READ_SIGNED_OR_RETURN(4, &qhdr->y_dc_delta);
- BD_READ_BOOL_OR_RETURN(&delta_present);
- if (delta_present)
- BD_READ_SIGNED_OR_RETURN(4, &qhdr->y2_dc_delta);
- BD_READ_BOOL_OR_RETURN(&delta_present);
- if (delta_present)
- BD_READ_SIGNED_OR_RETURN(4, &qhdr->y2_ac_delta);
- BD_READ_BOOL_OR_RETURN(&delta_present);
- if (delta_present)
- BD_READ_SIGNED_OR_RETURN(4, &qhdr->uv_dc_delta);
- BD_READ_BOOL_OR_RETURN(&delta_present);
- if (delta_present)
- BD_READ_SIGNED_OR_RETURN(4, &qhdr->uv_ac_delta);
- return true;
- }
- // See spec for details on these values.
- const uint8_t kCoeffUpdateProbs[kNumBlockTypes][kNumCoeffBands]
- [kNumPrevCoeffContexts][kNumEntropyNodes] = {
- {
- {
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255},
- {249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255},
- {234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255},
- {250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255},
- {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- },
- {
- {
- {217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255},
- {234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255},
- },
- {
- {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
- {250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- },
- {
- {
- {186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255},
- {234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255},
- {251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255},
- },
- {
- {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- },
- {
- {
- {248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255},
- {248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
- {246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
- {252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255},
- {248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
- {253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255},
- {252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255},
- {250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- {
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
- },
- },
- };
- const uint8_t kKeyframeYModeProbs[kNumYModeProbs] = {145, 156, 163, 128};
- const uint8_t kKeyframeUVModeProbs[kNumUVModeProbs] = {142, 114, 183};
- const uint8_t kDefaultYModeProbs[kNumYModeProbs] = {112, 86, 140, 37};
- const uint8_t kDefaultUVModeProbs[kNumUVModeProbs] = {162, 101, 204};
- const uint8_t kDefaultCoeffProbs[kNumBlockTypes][kNumCoeffBands]
- [kNumPrevCoeffContexts][kNumEntropyNodes] = {
- {
- {
- {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
- {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
- {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
- },
- {
- {253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128},
- {189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128},
- {106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128},
- },
- {
- { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128},
- {181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128},
- { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128},
- },
- {
- { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128},
- {184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128},
- { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128},
- },
- {
- { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128},
- {170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128},
- { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128},
- },
- {
- { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128},
- {207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128},
- {102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128},
- },
- {
- { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128},
- {177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128},
- { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128},
- },
- {
- { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- {246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- {255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
- }
- },
- {
- {
- {198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62},
- {131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1},
- { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128},
- },
- {
- { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128},
- {184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128},
- { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128},
- },
- {
- { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128},
- { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128},
- { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128},
- },
- {
- { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128},
- {109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128},
- { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128},
- },
- {
- { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128},
- { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128},
- { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128},
- },
- {
- { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128},
- {124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128},
- { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128},
- },
- {
- { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128},
- {121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128},
- { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128},
- },
- {
- { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128},
- {203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128},
- {137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128},
- }
- },
- {
- {
- {253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128},
- {175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128},
- { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128},
- },
- {
- { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128},
- {239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128},
- {155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128},
- },
- {
- { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128},
- {201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128},
- { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128},
- },
- {
- { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128},
- {223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128},
- {141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128},
- },
- {
- { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128},
- {190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128},
- {149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- },
- {
- { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- {247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- {240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- },
- {
- { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128},
- {213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128},
- { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- },
- {
- {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
- {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
- {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
- }
- },
- {
- {
- {202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255},
- {126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128},
- { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128},
- },
- {
- { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128},
- {166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128},
- { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128},
- },
- {
- { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128},
- {124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128},
- { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128},
- },
- {
- { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128},
- {149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128},
- { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128}
- },
- {
- { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128},
- {123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128},
- { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128},
- },
- {
- { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128},
- {168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128},
- { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128},
- },
- {
- { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128},
- {141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128},
- { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128},
- },
- {
- { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- {244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- {238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
- },
- },
- };
- const uint8_t kMVUpdateProbs[kNumMVContexts][kNumMVProbs] =
- {
- {
- 237, 246, 253, 253, 254, 254, 254, 254, 254,
- 254, 254, 254, 254, 254, 250, 250, 252, 254, 254,
- },
- {
- 231, 243, 245, 253, 254, 254, 254, 254, 254,
- 254, 254, 254, 254, 254, 251, 251, 254, 254, 254,
- },
- };
- const uint8_t kDefaultMVProbs[kNumMVContexts][kNumMVProbs] = {
- {
- 162, 128, 225, 146, 172, 147, 214, 39, 156,
- 128, 129, 132, 75, 145, 178, 206, 239, 254, 254,
- },
- {
- 164, 128, 204, 170, 119, 235, 140, 230, 228,
- 128, 130, 130, 74, 148, 180, 203, 236, 254, 254,
- },
- };
- void Vp8Parser::ResetProbs() {
- static_assert(
- sizeof(curr_entropy_hdr_.coeff_probs) == sizeof(kDefaultCoeffProbs),
- "coeff_probs_arrays_must_be_of_correct_size");
- memcpy(curr_entropy_hdr_.coeff_probs, kDefaultCoeffProbs,
- sizeof(curr_entropy_hdr_.coeff_probs));
- static_assert(sizeof(curr_entropy_hdr_.mv_probs) == sizeof(kDefaultMVProbs),
- "mv_probs_arrays_must_be_of_correct_size");
- memcpy(curr_entropy_hdr_.mv_probs, kDefaultMVProbs,
- sizeof(curr_entropy_hdr_.mv_probs));
- static_assert(
- sizeof(curr_entropy_hdr_.y_mode_probs) == sizeof(kDefaultYModeProbs),
- "y_probs_arrays_must_be_of_correct_size");
- memcpy(curr_entropy_hdr_.y_mode_probs, kDefaultYModeProbs,
- sizeof(curr_entropy_hdr_.y_mode_probs));
- static_assert(
- sizeof(curr_entropy_hdr_.uv_mode_probs) == sizeof(kDefaultUVModeProbs),
- "uv_probs_arrays_must_be_of_correct_size");
- memcpy(curr_entropy_hdr_.uv_mode_probs, kDefaultUVModeProbs,
- sizeof(curr_entropy_hdr_.uv_mode_probs));
- }
- bool Vp8Parser::ParseTokenProbs(Vp8EntropyHeader* ehdr,
- bool update_curr_probs) {
- for (size_t i = 0; i < kNumBlockTypes; ++i) {
- for (size_t j = 0; j < kNumCoeffBands; ++j) {
- for (size_t k = 0; k < kNumPrevCoeffContexts; ++k) {
- for (size_t l = 0; l < kNumEntropyNodes; ++l) {
- bool coeff_prob_update_flag;
- BD_READ_BOOL_WITH_PROB_OR_RETURN(&coeff_prob_update_flag,
- kCoeffUpdateProbs[i][j][k][l]);
- if (coeff_prob_update_flag)
- BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->coeff_probs[i][j][k][l]);
- }
- }
- }
- }
- if (update_curr_probs) {
- memcpy(curr_entropy_hdr_.coeff_probs, ehdr->coeff_probs,
- sizeof(curr_entropy_hdr_.coeff_probs));
- }
- return true;
- }
- bool Vp8Parser::ParseIntraProbs(Vp8EntropyHeader* ehdr,
- bool update_curr_probs,
- bool keyframe) {
- if (keyframe) {
- static_assert(
- sizeof(ehdr->y_mode_probs) == sizeof(kKeyframeYModeProbs),
- "y_probs_arrays_must_be_of_correct_size");
- memcpy(ehdr->y_mode_probs, kKeyframeYModeProbs,
- sizeof(ehdr->y_mode_probs));
- static_assert(
- sizeof(ehdr->uv_mode_probs) == sizeof(kKeyframeUVModeProbs),
- "uv_probs_arrays_must_be_of_correct_size");
- memcpy(ehdr->uv_mode_probs, kKeyframeUVModeProbs,
- sizeof(ehdr->uv_mode_probs));
- } else {
- bool intra_16x16_prob_update_flag;
- BD_READ_BOOL_OR_RETURN(&intra_16x16_prob_update_flag);
- if (intra_16x16_prob_update_flag) {
- for (size_t i = 0; i < kNumYModeProbs; ++i)
- BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->y_mode_probs[i]);
- if (update_curr_probs) {
- memcpy(curr_entropy_hdr_.y_mode_probs, ehdr->y_mode_probs,
- sizeof(curr_entropy_hdr_.y_mode_probs));
- }
- }
- bool intra_chroma_prob_update_flag;
- BD_READ_BOOL_OR_RETURN(&intra_chroma_prob_update_flag);
- if (intra_chroma_prob_update_flag) {
- for (size_t i = 0; i < kNumUVModeProbs; ++i)
- BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->uv_mode_probs[i]);
- if (update_curr_probs) {
- memcpy(curr_entropy_hdr_.uv_mode_probs, ehdr->uv_mode_probs,
- sizeof(curr_entropy_hdr_.uv_mode_probs));
- }
- }
- }
- return true;
- }
- bool Vp8Parser::ParseMVProbs(Vp8EntropyHeader* ehdr, bool update_curr_probs) {
- for (size_t mv_ctx = 0; mv_ctx < kNumMVContexts; ++mv_ctx) {
- for (size_t p = 0; p < kNumMVProbs; ++p) {
- bool mv_prob_update_flag;
- BD_READ_BOOL_WITH_PROB_OR_RETURN(&mv_prob_update_flag,
- kMVUpdateProbs[mv_ctx][p]);
- if (mv_prob_update_flag) {
- uint8_t prob;
- BD_READ_UNSIGNED_OR_RETURN(7, &prob);
- ehdr->mv_probs[mv_ctx][p] = prob ? (prob << 1) : 1;
- }
- }
- }
- if (update_curr_probs) {
- memcpy(curr_entropy_hdr_.mv_probs, ehdr->mv_probs,
- sizeof(curr_entropy_hdr_.mv_probs));
- }
- return true;
- }
- bool Vp8Parser::ParsePartitions(Vp8FrameHeader* fhdr) {
- CHECK_GE(fhdr->num_of_dct_partitions, 1u);
- CHECK_LE(fhdr->num_of_dct_partitions, kMaxDCTPartitions);
- // DCT partitions start after the first partition and partition size values
- // that follow it. There are num_of_dct_partitions - 1 sizes stored in the
- // stream after the first partition, each 3 bytes long. The size of last
- // DCT partition is not stored in the stream, but is instead calculated by
- // taking the remainder of the frame size after the penultimate DCT partition.
- size_t first_dct_pos = fhdr->first_part_offset + fhdr->first_part_size +
- (fhdr->num_of_dct_partitions - 1) * 3;
- // Make sure we have enough data for the first partition and partition sizes.
- if (fhdr->frame_size < first_dct_pos)
- return false;
- // Total size of all DCT partitions.
- size_t bytes_left = fhdr->frame_size - first_dct_pos;
- // Position ourselves at the beginning of partition size values.
- const uint8_t* ptr =
- fhdr->data + fhdr->first_part_offset + fhdr->first_part_size;
- // Read sizes from the stream (if present).
- for (size_t i = 0; i < fhdr->num_of_dct_partitions - 1; ++i) {
- fhdr->dct_partition_sizes[i] = (ptr[2] << 16) | (ptr[1] << 8) | ptr[0];
- // Make sure we have enough data in the stream for ith partition and
- // subtract its size from total.
- if (bytes_left < fhdr->dct_partition_sizes[i])
- return false;
- bytes_left -= fhdr->dct_partition_sizes[i];
- // Move to the position of the next partition size value.
- ptr += 3;
- }
- // The remainder of the data belongs to the last DCT partition.
- fhdr->dct_partition_sizes[fhdr->num_of_dct_partitions - 1] = bytes_left;
- DVLOG(4) << "Control part size: " << fhdr->first_part_size;
- for (size_t i = 0; i < fhdr->num_of_dct_partitions; ++i)
- DVLOG(4) << "DCT part " << i << " size: " << fhdr->dct_partition_sizes[i];
- return true;
- }
- } // namespace media
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