Add AudioBufferStream.

media/filters/fake_video_decoder.h

 // Copyright 2013 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 MEDIA_FILTERS_FAKE_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_FAKE_VIDEO_DECODER_H_
 
 #include <list>
 
 #include "base/bind.h"
@@ skipping 22 matching lines @@
   explicit FakeVideoDecoder(int decoding_delay);
   virtual ~FakeVideoDecoder();
 
   // VideoDecoder implementation.
   virtual void Initialize(const VideoDecoderConfig& config,
                           const PipelineStatusCB& status_cb) OVERRIDE;
   virtual void Decode(const scoped_refptr<DecoderBuffer>& buffer,
                       const DecodeCB& decode_cb) OVERRIDE;
   virtual void Reset(const base::Closure& closure) OVERRIDE;
   virtual void Stop(const base::Closure& closure) OVERRIDE;
+  virtual scoped_refptr<VideoFrame> GetDecodeOutput() OVERRIDE;
+
+  // Queue up a VideoFrame to be returned by GetDecodeOutput().
+  void QueueRead();

[xhwang, 2014/03/06 23:32:40]

You probably also need to update fake_video_decoder_unittest.cc.

 
   // Holds the next init/read/reset/stop callback from firing.
   void HoldNextInit();
   void HoldNextRead();
   void HoldNextReset();
   void HoldNextStop();
 
   // Satisfies the pending init/read/reset/stop callback, which must be ready
   // to fire when these methods are called.
   void SatisfyInit();
   void SatisfyRead();

[xhwang, 2014/03/06 23:32:40]

We should replace all "read" with "decode" in another CL. It seems I forgot to
do that :)

   void SatisfyReset();
   void SatisfyStop();
 
   int total_bytes_decoded() const { return total_bytes_decoded_; }
+  int reads_queued() const { return reads_queued_; }
 
  private:
   enum State {
     UNINITIALIZED,
     NORMAL
   };
 
   // Callback for updating |total_bytes_decoded_|.
   void OnFrameDecoded(int buffer_size,
                       const DecodeCB& read_cb,
@@ skipping 15 matching lines @@
   CallbackHolder<DecodeCB> decode_cb_;
   CallbackHolder<base::Closure> reset_cb_;
   CallbackHolder<base::Closure> stop_cb_;
 
   VideoDecoderConfig current_config_;
 
   std::list<scoped_refptr<VideoFrame> > decoded_frames_;
 
   int total_bytes_decoded_;
 
+  int reads_queued_;
+
   DISALLOW_COPY_AND_ASSIGN(FakeVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FAKE_VIDEO_DECODER_H_