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/*
* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/video_coding/utility/qp_parser.h"
#include <cstddef>
#include <cstdint>
#include <optional>
#include "api/array_view.h"
#include "api/video/video_codec_constants.h"
#include "api/video/video_codec_type.h"
#include "modules/video_coding/utility/vp8_header_parser.h"
#include "modules/video_coding/utility/vp9_uncompressed_header_parser.h"
#include "rtc_base/synchronization/mutex.h"
namespace webrtc {
std::optional<uint32_t> QpParser::Parse(VideoCodecType codec_type,
size_t spatial_idx,
const uint8_t* frame_data,
size_t frame_size) {
if (frame_data == nullptr || frame_size == 0 ||
spatial_idx >= kMaxSimulcastStreams) {
return std::nullopt;
}
if (codec_type == kVideoCodecVP8) {
int qp = -1;
if (vp8::GetQp(frame_data, frame_size, &qp)) {
return qp;
}
} else if (codec_type == kVideoCodecVP9) {
int qp = -1;
if (vp9::GetQp(frame_data, frame_size, &qp)) {
return qp;
}
} else if (codec_type == kVideoCodecH264) {
return h264_parsers_[spatial_idx].Parse(frame_data, frame_size);
} else if (codec_type == kVideoCodecH265) {
// H.265 bitstream parser is conditionally built.
#ifdef RTC_ENABLE_H265
return h265_parsers_[spatial_idx].Parse(frame_data, frame_size);
#endif
}
return std::nullopt;
}
std::optional<uint32_t> QpParser::H264QpParser::Parse(const uint8_t* frame_data,
size_t frame_size) {
MutexLock lock(&mutex_);
bitstream_parser_.ParseBitstream(
ArrayView<const uint8_t>(frame_data, frame_size));
return bitstream_parser_.GetLastSliceQp();
}
#ifdef RTC_ENABLE_H265
std::optional<uint32_t> QpParser::H265QpParser::Parse(const uint8_t* frame_data,
size_t frame_size) {
MutexLock lock(&mutex_);
bitstream_parser_.ParseBitstream(
ArrayView<const uint8_t>(frame_data, frame_size));
return bitstream_parser_.GetLastSliceQp();
}
#endif
} // namespace webrtc
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