remove AVFrame Dependency

media/filters/video_decode_engine.h

 // Copyright (c) 2010 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_VIDEO_DECODE_ENGINE_H_
 #define MEDIA_FILTERS_VIDEO_DECODE_ENGINE_H_
 
 #include "media/base/video_frame.h"
 
 // FFmpeg types.
@@ skipping 22 matching lines @@
 
   // Initialized the engine.  On successful Initialization, state() should
   // return kNormal.
   virtual void Initialize(AVStream* stream, Task* done_cb) = 0;
 
   // Decodes one frame of video with the given buffer.  Returns false if there
   // was a decode error, or a zero-byte frame was produced.
   //
   // TODO(ajwong): Should this function just allocate a new yuv_frame and return
   // it via a "GetNextFrame()" method or similar?
-  virtual void DecodeFrame(Buffer* buffer, AVFrame* yuv_frame,
+  virtual void DecodeFrame(Buffer* buffer,
+                           scoped_refptr<VideoFrame>* video_frame,
                            bool* got_result, Task* done_cb) = 0;
 
   // Flushes the decode engine of any buffered input packets.
   virtual void Flush(Task* done_cb) = 0;
 
   // Returns the VideoSurface::Format of the resulting |yuv_frame| from
   // DecodeFrame().
   virtual VideoFrame::Format GetSurfaceFormat() const = 0;
 
   // Returns the current state of the decode engine.
   virtual State state() const  = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VIDEO_DECODE_ENGINE_H_