45e5e385f3
No-Try: true Bug: webrtc:42225170 Change-Id: I4682f400054fee5c86ea24bebf6d703fb90074da Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/354722 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42650}
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef COMMON_VIDEO_H264_H264_BITSTREAM_PARSER_H_
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#define COMMON_VIDEO_H264_H264_BITSTREAM_PARSER_H_
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#include <stddef.h>
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#include <stdint.h>
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#include "absl/types/optional.h"
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#include "api/video_codecs/bitstream_parser.h"
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#include "common_video/h264/pps_parser.h"
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#include "common_video/h264/sps_parser.h"
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namespace webrtc {
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// Stateful H264 bitstream parser (due to SPS/PPS). Used to parse out QP values
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// from the bitstream.
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// TODO(pbos): Unify with RTP SPS parsing and only use one H264 parser.
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// TODO(pbos): If/when this gets used on the receiver side CHECKs must be
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// removed and gracefully abort as we have no control over receive-side
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// bitstreams.
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class H264BitstreamParser : public BitstreamParser {
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public:
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H264BitstreamParser();
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~H264BitstreamParser() override;
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void ParseBitstream(rtc::ArrayView<const uint8_t> bitstream) override;
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absl::optional<int> GetLastSliceQp() const override;
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protected:
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enum Result {
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kOk,
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kInvalidStream,
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kUnsupportedStream,
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};
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void ParseSlice(rtc::ArrayView<const uint8_t> slice);
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Result ParseNonParameterSetNalu(rtc::ArrayView<const uint8_t> source,
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uint8_t nalu_type);
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// SPS/PPS state, updated when parsing new SPS/PPS, used to parse slices.
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absl::optional<SpsParser::SpsState> sps_;
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absl::optional<PpsParser::PpsState> pps_;
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// Last parsed slice QP.
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absl::optional<int32_t> last_slice_qp_delta_;
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};
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} // namespace webrtc
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#endif // COMMON_VIDEO_H264_H264_BITSTREAM_PARSER_H_
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