Add support for config changes during playback to FFmpegVideoDecoder.

media/filters/source_buffer_stream.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.
 
 // SourceBufferStream is a data structure that stores media Buffers in ranges.
 // Buffers can be appended out of presentation order. Buffers are retrieved by
 // seeking to the desired start point and calling GetNextBuffer(). Buffers are
 // returned in sequential presentation order.
 
 #ifndef MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_
@@ skipping 240 matching lines @@
   // True when the next call to Append() begins a new media segment.
   bool new_media_segment_;
 
   // The timestamp of the last buffer appended to the media segment, set to
   // kNoTimestamp() if the beginning of the segment.
   base::TimeDelta last_buffer_timestamp_;
 
   // Stores the largest distance between two adjacent buffers in this stream.
   base::TimeDelta max_interbuffer_distance_;
 
-// The maximum amount of data in bytes the stream will keep in memory.
+  // The maximum amount of data in bytes the stream will keep in memory.
   int memory_limit_;
 
+  // Indicates that a kConfigChanged status has been reported by GetNextBuffer()
+  // and GetCurrentXXXDecoderConfig() must be called to update the current
+  // config. GetNextBuffer() must not be called again until
+  // GetCurrentXXXDecoderConfig() has been called.
+  bool config_change_pending_;
+
   DISALLOW_COPY_AND_ASSIGN(SourceBufferStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_