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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.
*/
#ifndef MODULES_VIDEO_CODING_H26X_PACKET_BUFFER_H_
#define MODULES_VIDEO_CODING_H26X_PACKET_BUFFER_H_
#include <array>
#include <memory>
#include <vector>
#include "absl/base/attributes.h"
#include "absl/types/optional.h"
#include "modules/video_coding/packet_buffer.h"
#include "rtc_base/numerics/sequence_number_unwrapper.h"
namespace webrtc {
class H26xPacketBuffer {
public:
// The H26xPacketBuffer does the same job as the PacketBuffer but for H264 and
// H265 only. To make it fit in with surronding code the PacketBuffer
// input/output classes are used.
using Packet = video_coding::PacketBuffer::Packet;
using InsertResult = video_coding::PacketBuffer::InsertResult;
// |h264_idr_only_keyframes_allowed| is ignored if H.265 is used.
explicit H26xPacketBuffer(bool h264_idr_only_keyframes_allowed);
ABSL_MUST_USE_RESULT InsertResult
InsertPacket(std::unique_ptr<Packet> packet);
private:
static constexpr int kBufferSize = 2048;
std::unique_ptr<Packet>& GetPacket(int64_t unwrapped_seq_num);
bool BeginningOfStream(const Packet& packet) const;
std::vector<std::unique_ptr<Packet>> FindFrames(int64_t unwrapped_seq_num);
bool MaybeAssembleFrame(int64_t start_seq_num_unwrapped,
int64_t end_sequence_number_unwrapped,
std::vector<std::unique_ptr<Packet>>& packets);
const bool h264_idr_only_keyframes_allowed_;
std::array<std::unique_ptr<Packet>, kBufferSize> buffer_;
absl::optional<int64_t> last_continuous_unwrapped_seq_num_;
SeqNumUnwrapper<uint16_t> seq_num_unwrapper_;
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_H26X_PACKET_BUFFER_H_
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