Introduce a client minimum picture pool size

media/video/video_decode_accelerator.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_VIDEO_VIDEO_DECODE_ACCELERATOR_H_
 #define MEDIA_VIDEO_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 79 matching lines @@
     virtual ~Client() {}
   };
 
   // Video decoder functions.
 
   // Initializes the video decoder with specific configuration.  Called once per
   // decoder construction.  This call is synchronous and returns true iff
   // initialization is successful.
   // Parameters:
   //  |profile| is the video stream's format profile.
+  //  |min_picture_count| is the minimum number of picture buffers needed for
+  //  playback. The decoder should allocate at least this number.
   //  |client| is the client of this video decoder.  The provided pointer must
   //  be valid until Destroy() is called.
-  virtual bool Initialize(VideoCodecProfile profile, Client* client) = 0;
+  virtual bool Initialize(
+      VideoCodecProfile profile,
+      uint32 min_picture_count,
+      Client* client) = 0;
 
   // Decodes given bitstream buffer that contains at most one frame.  Once
   // decoder is done with processing |bitstream_buffer| it will call
   // NotifyEndOfBitstreamBuffer() with the bitstream buffer id.
   // Parameters:
   //  |bitstream_buffer| is the input bitstream that is sent for decoding.
   virtual void Decode(const BitstreamBuffer& bitstream_buffer) = 0;
 
   // Assigns a set of texture-backed picture buffers to the video decoder.
   //
@@ skipping 64 matching lines @@
 // uses "Destroy()" instead of trying to use the destructor.
 template <>
 struct MEDIA_EXPORT DefaultDeleter<media::VideoDecodeAccelerator> {
  public:
   void operator()(void* video_decode_accelerator) const;
 };
 
 }  // namespace base
 
 #endif  // MEDIA_VIDEO_VIDEO_DECODE_ACCELERATOR_H_