mirror of https://github.com/NekoX-Dev/NekoX.git
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
/*
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* Copyright (c) 2016 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_RTP_FRAME_REFERENCE_FINDER_H_
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#define MODULES_VIDEO_CODING_RTP_FRAME_REFERENCE_FINDER_H_
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#include <memory>
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#include "modules/video_coding/frame_object.h"
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namespace webrtc {
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namespace internal {
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class RtpFrameReferenceFinderImpl;
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} // namespace internal
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// A complete frame is a frame which has received all its packets and all its
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// references are known.
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class OnCompleteFrameCallback {
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public:
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virtual ~OnCompleteFrameCallback() {}
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virtual void OnCompleteFrame(std::unique_ptr<EncodedFrame> frame) = 0;
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};
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class RtpFrameReferenceFinder {
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public:
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using ReturnVector = absl::InlinedVector<std::unique_ptr<RtpFrameObject>, 3>;
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explicit RtpFrameReferenceFinder(OnCompleteFrameCallback* frame_callback);
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explicit RtpFrameReferenceFinder(OnCompleteFrameCallback* frame_callback,
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int64_t picture_id_offset);
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~RtpFrameReferenceFinder();
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// Manage this frame until:
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// - We have all information needed to determine its references, after
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// which |frame_callback_| is called with the completed frame, or
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// - We have too many stashed frames (determined by |kMaxStashedFrames|)
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// so we drop this frame, or
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// - It gets cleared by ClearTo, which also means we drop it.
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void ManageFrame(std::unique_ptr<RtpFrameObject> frame);
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// Notifies that padding has been received, which the reference finder
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// might need to calculate the references of a frame.
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void PaddingReceived(uint16_t seq_num);
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// Clear all stashed frames that include packets older than |seq_num|.
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void ClearTo(uint16_t seq_num);
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private:
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void HandOffFrames(ReturnVector frames);
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// How far frames have been cleared out of the buffer by RTP sequence number.
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// A frame will be cleared if it contains a packet with a sequence number
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// older than |cleared_to_seq_num_|.
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int cleared_to_seq_num_ = -1;
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const int64_t picture_id_offset_;
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OnCompleteFrameCallback* frame_callback_;
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std::unique_ptr<internal::RtpFrameReferenceFinderImpl> impl_;
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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_RTP_FRAME_REFERENCE_FINDER_H_
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