86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
/*
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* Copyright 2019 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 PC_VIDEO_RTP_TRACK_SOURCE_H_
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#define PC_VIDEO_RTP_TRACK_SOURCE_H_
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#include <vector>
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#include "media/base/video_broadcaster.h"
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#include "pc/video_track_source.h"
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#include "rtc_base/callback.h"
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#include "rtc_base/synchronization/mutex.h"
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namespace webrtc {
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// Video track source in use by VideoRtpReceiver
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class VideoRtpTrackSource : public VideoTrackSource {
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public:
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class Callback {
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public:
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virtual ~Callback() = default;
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// Called when a keyframe should be generated
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virtual void OnGenerateKeyFrame() = 0;
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// Called when the implementor should eventually start to serve encoded
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// frames using BroadcastEncodedFrameBuffer.
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// The implementor should cause a keyframe to be eventually generated.
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virtual void OnEncodedSinkEnabled(bool enable) = 0;
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};
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explicit VideoRtpTrackSource(Callback* callback);
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// Call before the object implementing Callback finishes it's destructor. No
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// more callbacks will be fired after completion. Must be called on the
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// worker thread
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void ClearCallback();
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// Call to broadcast an encoded frame to registered sinks.
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// This method can be called on any thread or queue.
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void BroadcastRecordableEncodedFrame(
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const RecordableEncodedFrame& frame) const;
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// VideoTrackSource
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rtc::VideoSourceInterface<VideoFrame>* source() override;
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rtc::VideoSinkInterface<VideoFrame>* sink();
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// Returns true. This method can be called on any thread.
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bool SupportsEncodedOutput() const override;
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// Generates a key frame. Must be called on the worker thread.
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void GenerateKeyFrame() override;
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// Adds an encoded sink. Must be called on the worker thread.
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void AddEncodedSink(
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rtc::VideoSinkInterface<RecordableEncodedFrame>* sink) override;
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// Removes an encoded sink. Must be called on the worker thread.
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void RemoveEncodedSink(
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rtc::VideoSinkInterface<RecordableEncodedFrame>* sink) override;
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private:
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SequenceChecker worker_sequence_checker_;
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// |broadcaster_| is needed since the decoder can only handle one sink.
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// It might be better if the decoder can handle multiple sinks and consider
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// the VideoSinkWants.
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rtc::VideoBroadcaster broadcaster_;
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mutable Mutex mu_;
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std::vector<rtc::VideoSinkInterface<RecordableEncodedFrame>*> encoded_sinks_
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RTC_GUARDED_BY(mu_);
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Callback* callback_ RTC_GUARDED_BY(worker_sequence_checker_);
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RTC_DISALLOW_COPY_AND_ASSIGN(VideoRtpTrackSource);
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};
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} // namespace webrtc
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#endif // PC_VIDEO_RTP_TRACK_SOURCE_H_
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