Add config change support 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 <deque>
 
 #include "base/callback.h"
@@ skipping 54 matching lines @@
 
   // Carries out the decoding operation scheduled by DecodeBuffer().
   void DoDecodeBuffer(DemuxerStream::Status status,
                       const scoped_refptr<DecoderBuffer>& buffer);
   bool Decode(const scoped_refptr<DecoderBuffer>& buffer,
               scoped_refptr<VideoFrame>* video_frame);
 
   // Delivers the frame to |read_cb_| and resets the callback.
   void DeliverFrame(const scoped_refptr<VideoFrame>& video_frame);
 
+  // Allocate resources for |codec_context_| and |av_frame_| based
+  // on the information in |config|.
+  bool AllocateFFmpegResources(const VideoDecoderConfig& config);
+
   // Releases resources associated with |codec_context_| and |av_frame_|
   // and resets them to NULL.
   void ReleaseFFmpegResources();
 
   // Reset decoder and call |reset_cb_|.
   void DoReset();
 
+  // Handles fetching a new config from the demuxer stream and
+  // reinitializing the decoder. Returns true if the config change
+  // was successful. Returns false if an error occured.
+  bool HandleConfigChange();
+
   // This is !is_null() iff Initialize() hasn't been called.
   base::Callback<MessageLoop*()> message_loop_factory_cb_;
 
   MessageLoop* message_loop_;
 
   DecoderState state_;
 
   StatisticsCB statistics_cb_;
 
   ReadCB read_cb_;
@@ skipping 15 matching lines @@
   scoped_refptr<DemuxerStream> demuxer_stream_;
 
   Decryptor* decryptor_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_