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_PUBLIC_RENDERER_MEDIA_STREAM_VIDEO_SINK_H_ 6 #define CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_VIDEO_SINK_H_ 7 8 #include "base/compiler_specific.h" 9 #include "base/memory/ref_counted.h" 10 #include "content/common/content_export.h" 11 #include "content/public/renderer/media_stream_sink.h" 12 13 namespace media { 14 class VideoFrame; 15 } 16 17 namespace blink { 18 class WebMediaStreamTrack; 19 } 20 21 namespace content { 22 23 // MediaStreamVideoSink is an interface used for receiving video frames from a 24 // Video Stream Track or a Video Source. 25 // http://dev.w3.org/2011/webrtc/editor/getusermedia.html 26 // All methods calls will be done from the main render thread. 27 class CONTENT_EXPORT MediaStreamVideoSink : public MediaStreamSink { 28 public: 29 // An implementation of MediaStreamVideoSink should call AddToVideoTrack when 30 // it is ready to receive data from a video track. Before the implementation 31 // is destroyed, RemoveFromVideoTrack must be called. 32 // Calls to these methods must be done on the main render thread. 33 static void AddToVideoTrack(MediaStreamVideoSink* sink, 34 const blink::WebMediaStreamTrack& track); 35 static void RemoveFromVideoTrack(MediaStreamVideoSink* sink, 36 const blink::WebMediaStreamTrack& track); 37 38 virtual void OnVideoFrame(const scoped_refptr<media::VideoFrame>& frame) = 0; 39 40 protected: ~MediaStreamVideoSink()41 virtual ~MediaStreamVideoSink() {} 42 }; 43 44 45 } // namespace content 46 47 #endif // CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_VIDEO_SINK_H_ 48