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

media/base/filters.h

 // Copyright (c) 2006-2009 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.
 
 // Filters are connected in a strongly typed manner, with downstream filters
 // always reading data from upstream filters.  Upstream filters have no clue
 // who is actually reading from them, and return the results via callbacks.
 //
 //                         DemuxerStream(Video) <- VideoDecoder <- VideoRenderer
 // DataSource <- Demuxer <
@@ skipping 296 matching lines @@
     return FILTER_VIDEO_RENDERER;
   }
 
   static const char* major_mime_type() {
     return mime_type::kMajorTypeVideo;
   }
 
   // Initialize a VideoRenderer with the given VideoDecoder, executing the
   // callback upon completion.
   virtual void Initialize(VideoDecoder* decoder, FilterCallback* callback) = 0;
+
+  // Returns true if this filter has received and processed an end-of-stream
+  // buffer.
+  virtual bool HasEnded() = 0;
 };
 
 
 class AudioRenderer : public MediaFilter {
  public:
   static const FilterType filter_type() {
     return FILTER_AUDIO_RENDERER;
   }
 
   static const char* major_mime_type() {
     return mime_type::kMajorTypeAudio;
   }
 
   // Initialize a AudioRenderer with the given AudioDecoder, executing the
   // callback upon completion.
   virtual void Initialize(AudioDecoder* decoder, FilterCallback* callback) = 0;
 
+  // Returns true if this filter has received and processed an end-of-stream
+  // buffer.
+  virtual bool HasEnded() = 0;
+
   // Sets the output volume.
   virtual void SetVolume(float volume) = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTERS_H_