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097fc347ec
This is in prep for the migration of all unwrappers to SequenceNumberUnwrapper as a standard implementation. This moves the SeqNumUnwapper to its own header and adds 2 methods to SeqNumUnwrapper which are defined by other unwrappers: * PeekUnwrap * Reset It also adds two implementations for RtpTimestamps and RtpSequenceNumbers. Bug: webrtc:13982 Change-Id: I5baefb2de1db92fe1bb600760bd63b71e9310eb5 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/288742 Commit-Queue: Evan Shrubsole <eshr@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Auto-Submit: Evan Shrubsole <eshr@webrtc.org> Cr-Commit-Position: refs/heads/main@{#39030}
56 lines
1.9 KiB
C++
56 lines
1.9 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_H264_PACKET_BUFFER_H_
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#define MODULES_VIDEO_CODING_H264_PACKET_BUFFER_H_
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#include <array>
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#include <memory>
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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 H264PacketBuffer {
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public:
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// The H264PacketBuffer does the same job as the PacketBuffer but for H264
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// only. To make it fit in with surronding code the PacketBuffer input/output
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// 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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explicit H264PacketBuffer(bool 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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private:
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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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std::vector<std::unique_ptr<Packet>> 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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std::vector<std::unique_ptr<Packet>>& packets);
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const bool 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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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_H264_PACKET_BUFFER_H_
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