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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/public/web/modules/mediastream/media_stream_video_source.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/webrtc/api/media_stream_interface.h"
namespace blink {
class TrackObserver;
// MediaStreamRemoteVideoSource implements the MediaStreamVideoSource
// interface for video tracks received on a PeerConnection. The purpose of the
// class is to make sure there is no difference between a video track where the
// source is a local source and a video track where the source is a remote video
// track.
class MODULES_EXPORT MediaStreamRemoteVideoSource
: public MediaStreamVideoSource {
public:
explicit MediaStreamRemoteVideoSource(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
std::unique_ptr<TrackObserver> observer);
MediaStreamRemoteVideoSource(const MediaStreamRemoteVideoSource&) = delete;
MediaStreamRemoteVideoSource& operator=(const MediaStreamRemoteVideoSource&) =
delete;
~MediaStreamRemoteVideoSource() override;
// Should be called when the remote video track this source originates from is
// no longer received on a PeerConnection. This cleans up the references to
// the webrtc::MediaStreamTrackInterface instance held by |observer_|.
void OnSourceTerminated();
// MediaStreamVideoSource overrides.
bool SupportsEncodedOutput() const override;
void RequestKeyFrame() override;
base::WeakPtr<MediaStreamVideoSource> GetWeakPtr() override;
protected:
// Implements MediaStreamVideoSource.
void StartSourceImpl(
MediaStreamVideoSourceCallbacks media_stream_callbacks) override;
void StopSourceImpl() override;
void OnEncodedSinkEnabled() override;
void OnEncodedSinkDisabled() override;
// Used by tests to test that a frame can be received and that the
// MediaStreamRemoteVideoSource behaves as expected.
webrtc::VideoSinkInterface<webrtc::VideoFrame>* SinkInterfaceForTesting();
webrtc::VideoSinkInterface<webrtc::RecordableEncodedFrame>*
EncodedSinkInterfaceForTesting();
private:
void OnChanged(webrtc::MediaStreamTrackInterface::TrackState state);
// Internal class used for receiving frames from the webrtc track on a
// libjingle thread and forward it to the IO-thread.
class RemoteVideoSourceDelegate;
scoped_refptr<RemoteVideoSourceDelegate> delegate_;
std::unique_ptr<TrackObserver> observer_;
base::WeakPtrFactory<MediaStreamVideoSource> weak_factory_{this};
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
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