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