Wait on fence before reusing DXVA picture buffer

content/common/gpu/media/dxva_video_decode_accelerator_win.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 CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <d3d11.h>
 #include <d3d9.h>
 #include <stdint.h>
@@ skipping 219 matching lines @@
 
   // Flushes the decoder device to ensure that the decoded surface is copied
   // to the target surface. |iterations| helps to maintain an upper limit on
   // the number of times we try to complete the flush operation.
   void FlushDecoder(int iterations,
                     IDirect3DSurface9* src_surface,
                     IDirect3DSurface9* dest_surface,
                     int picture_buffer_id,
                     int input_buffer_id);
 
+  // Polls to wait for GPU commands to be finished on the picture buffer
+  // before reusing it.
+  void WaitForOutputBuffer(int32_t picture_buffer_id, int count);
+
   // Initializes the DX11 Video format converter media types.
   // Returns true on success.
   bool InitializeDX11VideoFormatConverterMediaType(int width, int height);
 
   // Returns the output video frame dimensions (width, height).
   // |sample| :- This is the output sample containing the video frame.
   // |width| :- The width is returned here.
   // |height| :- The height is returned here.
   // Returns true on success.
   bool GetVideoFrameDimensions(IMFSample* sample, int* width, int* height);
@@ skipping 144 matching lines @@
 
   // Function pointer for the MFCreateDXGIDeviceManager API.
   static CreateDXGIDeviceManager create_dxgi_device_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(DXVAVideoDecodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_