Add support for config changes during playback to FFmpegVideoDecoder.

media/filters/ffmpeg_video_decoder.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_FILTERS_FFMPEG_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/decryptor.h"
@@ skipping 62 matching lines @@
                        const scoped_refptr<DecoderBuffer>& buffer);
 
   // Carries out the operation scheduled by BufferDecrypted().
   void DoBufferDecrypted(Decryptor::Status decrypt_status,
                          const scoped_refptr<DecoderBuffer>& buffer);
 
   void DecodeBuffer(const scoped_refptr<DecoderBuffer>& buffer);
   bool Decode(const scoped_refptr<DecoderBuffer>& buffer,
               scoped_refptr<VideoFrame>* video_frame);
 
+  // Handles (re-)initializing the decoder with a (new) config.
+  // Returns true if initialization was successful.
+  bool ConfigureDecoder();
+
   // Releases resources associated with |codec_context_| and |av_frame_|
   // and resets them to NULL.
   void ReleaseFFmpegResources();
 
   // Reset decoder and call |reset_cb_|.
   void DoReset();
 
   // Free decoder resources and call |stop_cb_|.
   void DoStop();
 
@@ skipping 18 matching lines @@
   scoped_refptr<DemuxerStream> demuxer_stream_;
 
   Decryptor* decryptor_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_