Add plumbing and support for crossfading StreamParserBuffers.

media/base/stream_parser_buffer.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_STREAM_PARSER_BUFFER_H_
 #define MEDIA_BASE_STREAM_PARSER_BUFFER_H_
 
 #include "media/base/decoder_buffer.h"
 #include "media/base/media_export.h"
 
@@ skipping 15 matching lines @@
   // Decode timestamp. If not explicitly set, or set to kNoTimestamp(), the
   // value will be taken from the normal timestamp.
   base::TimeDelta GetDecodeTimestamp() const;
   void SetDecodeTimestamp(const base::TimeDelta& timestamp);
 
   // Gets/sets the ID of the decoder config associated with this
   // buffer.
   int GetConfigId() const;
   void SetConfigId(int config_id);
 
+  // Buffers to be exhausted before using the data in this DecoderBuffer.  Used
+  // to implement the Audio Splice Frame Algorithm per the MSE specification.
+  const std::vector<scoped_refptr<StreamParserBuffer> >& GetFadeOutPreroll()
+      const;
+  void SetFadeOutPreroll(
+      const std::vector<scoped_refptr<StreamParserBuffer> >& fade_out_preroll);
+
  private:
   StreamParserBuffer(const uint8* data, int data_size,
                      const uint8* side_data, int side_data_size,
                      bool is_keyframe);
   virtual ~StreamParserBuffer();
 
   bool is_keyframe_;
   base::TimeDelta decode_timestamp_;
   int config_id_;
+  std::vector<scoped_refptr<StreamParserBuffer> > fade_out_preroll_;
+
   DISALLOW_COPY_AND_ASSIGN(StreamParserBuffer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_STREAM_PARSER_BUFFER_H_