95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
// Copyright 2016 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#include "packager/media/codecs/video_slice_header_parser.h"
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#include "packager/media/base/rcheck.h"
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#include "packager/media/codecs/avc_decoder_configuration_record.h"
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#include "packager/media/codecs/hevc_decoder_configuration_record.h"
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namespace shaka {
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namespace media {
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namespace {
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int NumBitsToNumBytes(int size_in_bits) {
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// Round-up division.
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DCHECK_GE(size_in_bits, 0);
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return (size_in_bits - 1) / 8 + 1;
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}
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} // namespace
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H264VideoSliceHeaderParser::H264VideoSliceHeaderParser() {}
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H264VideoSliceHeaderParser::~H264VideoSliceHeaderParser() {}
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bool H264VideoSliceHeaderParser::Initialize(
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const std::vector<uint8_t>& decoder_configuration) {
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AVCDecoderConfigurationRecord config;
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RCHECK(config.Parse(decoder_configuration));
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for (size_t i = 0; i < config.nalu_count(); i++) {
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int id;
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const Nalu& nalu = config.nalu(i);
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if (nalu.type() == Nalu::H264_SPS) {
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RCHECK(parser_.ParseSps(nalu, &id) == H264Parser::kOk);
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} else {
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DCHECK_EQ(Nalu::H264_PPS, nalu.type());
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RCHECK(parser_.ParsePps(nalu, &id) == H264Parser::kOk);
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}
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}
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return true;
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}
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int64_t H264VideoSliceHeaderParser::GetHeaderSize(const Nalu& nalu) {
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DCHECK(nalu.is_video_slice());
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H264SliceHeader slice_header;
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if (parser_.ParseSliceHeader(nalu, &slice_header) != H264Parser::kOk)
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return -1;
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return NumBitsToNumBytes(slice_header.header_bit_size);
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}
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H265VideoSliceHeaderParser::H265VideoSliceHeaderParser() {}
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H265VideoSliceHeaderParser::~H265VideoSliceHeaderParser() {}
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bool H265VideoSliceHeaderParser::Initialize(
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const std::vector<uint8_t>& decoder_configuration) {
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int id;
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HEVCDecoderConfigurationRecord hevc_config;
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RCHECK(hevc_config.Parse(decoder_configuration));
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for (size_t i = 0; i < hevc_config.nalu_count(); i++) {
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const Nalu& nalu = hevc_config.nalu(i);
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if (nalu.type() == Nalu::H265_SPS) {
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RCHECK(parser_.ParseSps(nalu, &id) == H265Parser::kOk);
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} else if (nalu.type() == Nalu::H265_PPS) {
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RCHECK(parser_.ParsePps(nalu, &id) == H265Parser::kOk);
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} else if (nalu.type() == Nalu::H265_VPS) {
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// Ignore since it does not affect video slice header parsing.
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} else {
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VLOG(1) << "Ignoring decoder configuration Nalu of unknown type "
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<< nalu.type();
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}
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}
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return true;
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}
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int64_t H265VideoSliceHeaderParser::GetHeaderSize(const Nalu& nalu) {
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DCHECK(nalu.is_video_slice());
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H265SliceHeader slice_header;
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if (parser_.ParseSliceHeader(nalu, &slice_header) != H265Parser::kOk)
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return -1;
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return NumBitsToNumBytes(slice_header.header_bit_size);
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}
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} // namespace media
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} // namespace shaka
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