/*

  * This file is part of FFmpeg.

  *

  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 
 #ifndef AVUTIL_HWCONTEXT_DXVA2_H
 #define AVUTIL_HWCONTEXT_DXVA2_H
 
 /**
  * @file
  * An API-specific header for AV_HWDEVICE_TYPE_DXVA2.
  *
  * Only fixed-size pools are supported.
  *
  * For user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
  * with the data pointer set to a pointer to IDirect3DSurface9.
  */
 
 #include <d3d9.h>
 #include <dxva2api.h>
 
 /**
  * This struct is allocated as AVHWDeviceContext.hwctx
  */
 typedef struct AVDXVA2DeviceContext {
     IDirect3DDeviceManager9 *devmgr;
 } AVDXVA2DeviceContext;
 
 /**
  * This struct is allocated as AVHWFramesContext.hwctx
  */
 typedef struct AVDXVA2FramesContext {
     /**
      * The surface type (e.g. DXVA2_VideoProcessorRenderTarget or
      * DXVA2_VideoDecoderRenderTarget). Must be set by the caller.
      */
     DWORD               surface_type;
 
     /**
      * The surface pool. When an external pool is not provided by the caller,
      * this will be managed (allocated and filled on init, freed on uninit) by
      * libavutil.
      */
     IDirect3DSurface9 **surfaces;
     int              nb_surfaces;
 
     /**
      * Certain drivers require the decoder to be destroyed before the surfaces.
      * To allow internally managed pools to work properly in such cases, this
      * field is provided.
      *
      * If it is non-NULL, libavutil will call IDirectXVideoDecoder_Release() on
      * it just before the internal surface pool is freed.

      *
      * This is for convenience only. Some code uses other methods to manage the
      * decoder reference.

      */
     IDirectXVideoDecoder *decoder_to_release;
 } AVDXVA2FramesContext;
 
 #endif /* AVUTIL_HWCONTEXT_DXVA2_H */