972f28335a
This is part of effort to enable HEVC for WebRTC. Parser added here to support parsing of QP/picture size for bitstream, for dynamic adaptation and stream metadata abstraction. Bug: webrtc:13485 Change-Id: I2fbdf210e72e77989ca87ce285da174df5bedd5c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/298421 Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org> Cr-Commit-Position: refs/heads/main@{#40572}
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/*
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* Copyright (c) 2023 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_H265_H265_BITSTREAM_PARSER_H_
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#define COMMON_VIDEO_H265_H265_BITSTREAM_PARSER_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <vector>
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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/h265/h265_pps_parser.h"
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#include "common_video/h265/h265_sps_parser.h"
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#include "common_video/h265/h265_vps_parser.h"
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#include "rtc_base/containers/flat_map.h"
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namespace webrtc {
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// Stateful H265 bitstream parser (due to VPS/SPS/PPS). Used to parse out QP
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// values from the bitstream.
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class H265BitstreamParser : public BitstreamParser {
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public:
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H265BitstreamParser();
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~H265BitstreamParser() override;
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// New interface.
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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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static absl::optional<uint32_t> ParsePpsIdFromSliceSegmentLayerRbsp(
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const uint8_t* data,
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size_t length,
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uint8_t nalu_type);
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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(const uint8_t* slice, size_t length);
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Result ParseNonParameterSetNalu(const uint8_t* source,
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size_t source_length,
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uint8_t nalu_type);
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const H265PpsParser::PpsState* GetPPS(uint32_t id) const;
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const H265SpsParser::SpsState* GetSPS(uint32_t id) const;
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// VPS/SPS/PPS state, updated when parsing new VPS/SPS/PPS, used to parse
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// slices.
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flat_map<uint32_t, H265VpsParser::VpsState> vps_;
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flat_map<uint32_t, H265SpsParser::SpsState> sps_;
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flat_map<uint32_t, H265PpsParser::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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absl::optional<uint32_t> last_slice_pps_id_;
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};
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} // namespace webrtc
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#endif // COMMON_VIDEO_H265_H265_BITSTREAM_PARSER_H_
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