content/renderer/media/webrtc/media_stream_video_webrtc_sink.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_TRACK_ADAPTER_H_
   6 #define CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_TRACK_ADAPTER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/threading/thread_checker.h"
  10 #include "content/public/renderer/media_stream_video_sink.h"
  11 #include "content/renderer/media/webrtc/webrtc_video_capturer_adapter.h"
  12 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
  13 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
  14 #include "third_party/libjingle/source/talk/app/webrtc/videosourceinterface.h"
  15
  16 namespace content {
  17
  18 class MediaStreamVideoTrack;
  19 class PeerConnectionDependencyFactory;
  20
  21 // MediaStreamVideoWebRtcSink is an adapter between a
  22 // content::MediaStreamVideoTrack object and a webrtc VideoTrack that is
  23 // currently sent on a PeerConnection.
  24 // The responsibility of the class is to create and own a representation of a
  25 // webrtc VideoTrack that can be added and removed from a RTCPeerConnection. An
  26 // instance of MediaStreamVideoWebRtcSink is created when a VideoTrack is added
  27 // to an RTCPeerConnection object.
  28 // Instances of this class is owned by the WebRtcMediaStreamAdapter object that
  29 // created it.
  30 class MediaStreamVideoWebRtcSink : public MediaStreamVideoSink {
  31  public:
  32   MediaStreamVideoWebRtcSink(const blink::WebMediaStreamTrack& track,
  33                              PeerConnectionDependencyFactory* factory);
  34   ~MediaStreamVideoWebRtcSink() override;
  35
  36   webrtc::VideoTrackInterface* webrtc_video_track() {
  37     return video_track_.get();
  38   }
  39
  40  protected:
  41   // Implementation of MediaStreamSink.
  42   void OnEnabledChanged(bool enabled) override;
  43
  44  private:
  45   // Used to DCHECK that we are called on the correct thread.
  46   base::ThreadChecker thread_checker_;
  47
  48   scoped_refptr<webrtc::VideoTrackInterface> video_track_;
  49   blink::WebMediaStreamTrack web_track_;
  50
  51   class WebRtcVideoSourceAdapter;
  52   scoped_refptr<WebRtcVideoSourceAdapter> source_adapter_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoWebRtcSink);
  55 };
  56
  57 }  // namespace content
  58
  59 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_TRACK_ADAPTER_H_