| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_RENDERER_MEDIA_RTC_VIDEO_RENDERER_H_ |
| #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_RENDERER_H_ |
| |
| #include "base/callback.h" |
| #include "content/common/content_export.h" |
| #include "content/public/renderer/media_stream_video_sink.h" |
| #include "content/renderer/media/video_frame_provider.h" |
| #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h" |
| #include "ui/gfx/size.h" |
| |
| namespace base { |
| class MessageLoopProxy; |
| } |
| |
| namespace content { |
| |
| // RTCVideoRenderer is a VideoFrameProvider designed for rendering |
| // Video MediaStreamTracks, |
| // http://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediastreamtrack |
| // RTCVideoRenderer implements VideoTrackSink in order to render |
| // video frames provided from a VideoTrack. |
| // RTCVideoRenderer register itself as a sink to the VideoTrack when the |
| // VideoFrameProvider is started and deregisters itself when it is stopped. |
| // TODO(wuchengli): Add unit test. See the link below for reference. |
| // http://src.chromium.org/viewvc/chrome/trunk/src/content/renderer/media/rtc_vi |
| // deo_decoder_unittest.cc?revision=180591&view=markup |
| class CONTENT_EXPORT RTCVideoRenderer |
| : NON_EXPORTED_BASE(public VideoFrameProvider), |
| NON_EXPORTED_BASE(public MediaStreamVideoSink) { |
| public: |
| RTCVideoRenderer(const blink::WebMediaStreamTrack& video_track, |
| const base::Closure& error_cb, |
| const RepaintCB& repaint_cb); |
| |
| // VideoFrameProvider implementation. Called on the main thread. |
| virtual void Start() OVERRIDE; |
| virtual void Stop() OVERRIDE; |
| virtual void Play() OVERRIDE; |
| virtual void Pause() OVERRIDE; |
| |
| protected: |
| virtual ~RTCVideoRenderer(); |
| |
| private: |
| enum State { |
| STARTED, |
| PAUSED, |
| STOPPED, |
| }; |
| |
| // VideoTrackSink implementation. Called on the main thread. |
| virtual void OnVideoFrame( |
| const scoped_refptr<media::VideoFrame>& frame) OVERRIDE; |
| virtual void OnReadyStateChanged( |
| blink::WebMediaStreamSource::ReadyState state) OVERRIDE; |
| virtual void OnEnabledChanged(bool enabled) OVERRIDE; |
| |
| void MaybeRenderSignalingFrame(); |
| |
| base::Closure error_cb_; |
| RepaintCB repaint_cb_; |
| scoped_refptr<base::MessageLoopProxy> message_loop_proxy_; |
| State state_; |
| bool first_frame_rendered_; |
| blink::WebMediaStreamTrack video_track_; |
| |
| DISALLOW_COPY_AND_ASSIGN(RTCVideoRenderer); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_MEDIA_RTC_VIDEO_RENDERER_H_ |