Add config change handling to SourceBufferStream & ChunkDemuxer

media/base/audio_decoder_config.h

 // 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 MEDIA_BASE_AUDIO_DECODER_CONFIG_H_
 #define MEDIA_BASE_AUDIO_DECODER_CONFIG_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/base/channel_layout.h"
@@ skipping 47 matching lines @@
                   const uint8* extra_data, size_t extra_data_size,
                   bool record_stats);
 
   // Deep copies |audio_config|.
   void CopyFrom(const AudioDecoderConfig& audio_config);
 
   // Returns true if this object has appropriate configuration values, false
   // otherwise.
   bool IsValidConfig() const;
 
+  // Returns true if all fields in |config| match this config.
+  // Note: The contents of |extra_data_| are compared not the raw pointers.
+  bool Matches(const AudioDecoderConfig& config) const;
+
   AudioCodec codec() const;
   int bits_per_channel() const;
   ChannelLayout channel_layout() const;
   int samples_per_second() const;
 
   // Optional byte data required to initialize audio decoders such as Vorbis
   // codebooks.
   uint8* extra_data() const;
   size_t extra_data_size() const;
 
  private:
   AudioCodec codec_;
   int bits_per_channel_;
   ChannelLayout channel_layout_;
   int samples_per_second_;
 
   scoped_array<uint8> extra_data_;
   size_t extra_data_size_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDecoderConfig);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_DECODER_CONFIG_H_