| // 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)); |
| } |
| |
| 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 |
