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      1 // Copyright 2013 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_MEDIA_STREAM_VIDEO_TRACK_H_
      6 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_TRACK_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "base/memory/scoped_vector.h"
     10 #include "base/threading/thread_checker.h"
     11 #include "content/common/content_export.h"
     12 #include "content/public/renderer/media_stream_video_sink.h"
     13 #include "content/renderer/media/media_stream_track_extra_data.h"
     14 
     15 namespace webrtc {
     16 class VideoTrackInterface;
     17 }
     18 
     19 namespace content {
     20 
     21 class WebRtcVideoSinkAdapter;
     22 
     23 // MediaStreamVideoTrack is a video specific representation of a
     24 // blink::WebMediaStreamTrack in content. It is owned by the blink object
     25 // and can be retrieved from a blink object using
     26 // WebMediaStreamTrack::extraData()
     27 class CONTENT_EXPORT MediaStreamVideoTrack : public MediaStreamTrackExtraData {
     28  public:
     29   MediaStreamVideoTrack(webrtc::VideoTrackInterface* track,
     30                         bool is_local_track);
     31   virtual ~MediaStreamVideoTrack();
     32   void AddSink(MediaStreamVideoSink* sink);
     33   void RemoveSink(MediaStreamVideoSink* sink);
     34 
     35  private:
     36   // Used to DCHECK that we are called on the correct thread.
     37   base::ThreadChecker thread_checker_;
     38   // The webrtc video track.
     39   // TODO(perkj): Make this class independent of webrtc as part of project
     40   // Piranha Plant.
     41   webrtc::VideoTrackInterface* video_track_;
     42   ScopedVector<WebRtcVideoSinkAdapter> sinks_;
     43 
     44   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoTrack);
     45 };
     46 
     47 }  // namespace content
     48 
     49 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_TRACK_H_
     50