Change DemuxerStream::ReadCallback to use ref-counted buffers.

media/filters/ffmpeg_audio_decoder.h

 // Copyright (c) 2011 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_FFMPEG_AUDIO_DECODER_H_
 #define MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_
 
 #include <list>
 
 #include "base/message_loop.h"
@@ skipping 25 matching lines @@
   // Methods running on decoder thread.
   void DoInitialize(const scoped_refptr<DemuxerStream>& stream,
                     const base::Closure& callback,
                     const StatisticsCallback& stats_callback);
   void DoFlush(const base::Closure& callback);
   void DoProduceAudioSamples(const scoped_refptr<Buffer>& output);
   void DoDecodeBuffer(const scoped_refptr<Buffer>& input);
 
   // Reads from the demuxer stream with corresponding callback method.
   void ReadFromDemuxerStream();
-  void DecodeBuffer(Buffer* buffer);
+  void DecodeBuffer(const scoped_refptr<Buffer>& buffer);
 
   // Updates the output buffer's duration and timestamp based on the input
   // buffer. Will fall back to an estimated timestamp if the input lacks a
   // valid timestamp.
   void UpdateDurationAndTimestamp(const Buffer* input, DataBuffer* output);
 
   // Calculates duration based on size of decoded audio bytes.
   base::TimeDelta CalculateDuration(int size);
 
   MessageLoop* message_loop_;
@@ skipping 20 matching lines @@
 
   // Tracks reads issued for compressed data.
   int pending_reads_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(FFmpegAudioDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_