Implemented end-of-stream callback for media::PipelineImpl.

media/filters/video_renderer_base.h

 // Copyright (c) 2009 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.
 
 // VideoRendererBase creates its own thread for the sole purpose of timing frame
 // presentation.  It handles reading from the decoder and stores the results in
 // a queue of decoded frames, calling OnFrameAvailable() on subclasses to notify
 // when a frame is ready to display.
 //
 // The media filter methods Initialize(), Stop(), SetPlaybackRate() and Seek()
@@ skipping 27 matching lines @@
 
   // MediaFilter implementation.
   virtual void Play(FilterCallback* callback);
   virtual void Pause(FilterCallback* callback);
   virtual void Stop();
   virtual void SetPlaybackRate(float playback_rate);
   virtual void Seek(base::TimeDelta time, FilterCallback* callback);
 
   // VideoRenderer implementation.
   virtual void Initialize(VideoDecoder* decoder, FilterCallback* callback);
+  virtual bool HasEnded();
 
   // PlatformThread::Delegate implementation.
   virtual void ThreadMain();
 
   // Assigns the current frame, which will never be NULL as long as this filter
   // is initialized.
   void GetCurrentFrame(scoped_refptr<VideoFrame>* frame_out);
 
  protected:
   // Subclass interface.  Called before any other initialization in the base
@@ skipping 26 matching lines @@
   // Safe to call from any thread.
   void ScheduleRead_Locked();
 
   // Calculates the duration to sleep for based on |current_frame_|'s timestamp,
   // the next frame timestamp (may be NULL), and the provided playback rate.
   //
   // We don't use |playback_rate_| to avoid locking.
   base::TimeDelta CalculateSleepDuration(VideoFrame* next_frame,
                                          float playback_rate);
 
-  // Allocates YV12 frame based on |width_| and |height_|, and sets its data to
-  // the YUV equivalent of RGB(0,0,0).
-  void CreateBlackFrame(scoped_refptr<VideoFrame>* frame_out);
-
   // Used for accessing data members.
   Lock lock_;
 
   scoped_refptr<VideoDecoder> decoder_;
 
   // Video dimensions parsed from the decoder's media format.
   int width_;
   int height_;
 
   // Queue of incoming frames as well as the current frame since the last time
   // OnFrameAvailable() was called.
   typedef std::deque< scoped_refptr<VideoFrame> > VideoFrameQueue;
   VideoFrameQueue frames_;
   scoped_refptr<VideoFrame> current_frame_;
 
   // Used to signal |thread_| as frames are added to |frames_|.  Rule of thumb:
   // always check |state_| to see if it was set to STOPPED after waking up!
   ConditionVariable frame_available_;
 
   // Simple state tracking variable.
   enum State {
     kUninitialized,
     kPaused,
     kSeeking,
     kPlaying,
+    kEnded,
     kStopped,
     kError,
   };
   State state_;
 
   // Video thread handle.
   PlatformThreadHandle thread_;
 
   // Previous time returned from the pipeline.
   base::TimeDelta previous_time_;
@@ skipping 10 matching lines @@
   // Filter callbacks.
   scoped_ptr<FilterCallback> pause_callback_;
   scoped_ptr<FilterCallback> seek_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoRendererBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VIDEO_RENDERER_BASE_H_