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d97b6499c3
This CL updates H26xPacketBuffer to store and prepend SPS and PPS for H.264 bitstreams when IDR only keyframe is allowed. Bug: webrtc:13485 Change-Id: Ic1edc623dff568d54d3ce29b42dd8eab3312f5cb Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/342225 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Philip Eliasson <philipel@webrtc.org> Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41986}
107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
/*
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* Copyright (c) 2021 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 MODULES_VIDEO_CODING_H26X_PACKET_BUFFER_H_
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#define MODULES_VIDEO_CODING_H26X_PACKET_BUFFER_H_
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#include <array>
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#include <map>
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#include <memory>
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#include <string>
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#include <vector>
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#include "absl/base/attributes.h"
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#include "absl/types/optional.h"
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#include "modules/video_coding/packet_buffer.h"
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#include "rtc_base/numerics/sequence_number_unwrapper.h"
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namespace webrtc {
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class H26xPacketBuffer {
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public:
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// The H26xPacketBuffer does the same job as the PacketBuffer but for H264 and
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// H265 only. To make it fit in with surronding code the PacketBuffer
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// input/output classes are used.
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using Packet = video_coding::PacketBuffer::Packet;
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using InsertResult = video_coding::PacketBuffer::InsertResult;
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// |h264_idr_only_keyframes_allowed| is ignored if H.265 is used.
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explicit H26xPacketBuffer(bool h264_idr_only_keyframes_allowed);
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ABSL_MUST_USE_RESULT InsertResult
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InsertPacket(std::unique_ptr<Packet> packet);
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// Out of band supplied codec parameters for H.264.
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void SetSpropParameterSets(const std::string& sprop_parameter_sets);
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private:
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// Stores PPS payload and the active SPS ID.
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struct PpsInfo {
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PpsInfo() = default;
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PpsInfo(PpsInfo&& rhs) = default;
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PpsInfo& operator=(PpsInfo&& rhs) = default;
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~PpsInfo() = default;
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// The value of sps_seq_parameter_set_id for the active SPS.
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uint32_t sps_id = 0;
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// Payload size.
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size_t size = 0;
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std::unique_ptr<uint8_t[]> payload;
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};
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// Stores SPS payload and picture size.
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struct SpsInfo {
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SpsInfo() = default;
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SpsInfo(SpsInfo&& rhs) = default;
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SpsInfo& operator=(SpsInfo&& rhs) = default;
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~SpsInfo() = default;
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// The width and height of decoded pictures.
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int width = -1;
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int height = -1;
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// Payload size.
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size_t size = 0;
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std::unique_ptr<uint8_t[]> payload;
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};
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static constexpr int kBufferSize = 2048;
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std::unique_ptr<Packet>& GetPacket(int64_t unwrapped_seq_num);
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bool BeginningOfStream(const Packet& packet) const;
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InsertResult FindFrames(int64_t unwrapped_seq_num);
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bool MaybeAssembleFrame(int64_t start_seq_num_unwrapped,
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int64_t end_sequence_number_unwrapped,
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InsertResult& result);
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// Store SPS and PPS nalus. They will be used later when an IDR frame is
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// received without SPS/PPS.
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void InsertSpsPpsNalus(const std::vector<uint8_t>& sps,
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const std::vector<uint8_t>& pps);
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// Insert start code and paramter sets for H.264 payload, also update header
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// if parameter sets are inserted. Return false if required SPS or PPS is not
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// found.
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bool FixH264Packet(Packet& packet);
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// Indicates whether IDR frames without SPS and PPS are allowed.
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const bool h264_idr_only_keyframes_allowed_;
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std::array<std::unique_ptr<Packet>, kBufferSize> buffer_;
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absl::optional<int64_t> last_continuous_unwrapped_seq_num_;
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SeqNumUnwrapper<uint16_t> seq_num_unwrapper_;
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// Map from pps_pic_parameter_set_id to the PPS payload associated with this
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// ID.
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std::map<uint32_t, PpsInfo> pps_data_;
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// Map from sps_video_parameter_set_id to the SPS payload associated with this
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// ID.
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std::map<uint32_t, SpsInfo> sps_data_;
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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_H26X_PACKET_BUFFER_H_
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