/*
  * Direct3D11 HW acceleration
  *
  * copyright (c) 2009 Laurent Aimar
  * copyright (c) 2015 Steve Lhomme
  *

  * 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 AVCODEC_D3D11VA_H
 #define AVCODEC_D3D11VA_H
 
 /**
  * @file
  * @ingroup lavc_codec_hwaccel_d3d11va
  * Public libavcodec D3D11VA header.
  */
 

 #if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0602

 #undef _WIN32_WINNT

 #define _WIN32_WINNT 0x0602

 #endif
 
 #include <stdint.h>
 #include <d3d11.h>
 
 /**
  * @defgroup lavc_codec_hwaccel_d3d11va Direct3D11
  * @ingroup lavc_codec_hwaccel
  *
  * @{
  */
 
 #define FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG 1 ///< Work around for Direct3D11 and old UVD/UVD+ ATI video cards
 #define FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO    2 ///< Work around for Direct3D11 and old Intel GPUs with ClearVideo interface
 
 /**
  * This structure is used to provides the necessary configurations and data

  * to the Direct3D11 FFmpeg HWAccel implementation.

  *
  * The application must make it available as AVCodecContext.hwaccel_context.

  *
  * Use av_d3d11va_alloc_context() exclusively to allocate an AVD3D11VAContext.

  */

 typedef struct AVD3D11VAContext {

     /**
      * D3D11 decoder object
      */
     ID3D11VideoDecoder *decoder;
 
     /**
       * D3D11 VideoContext
       */
     ID3D11VideoContext *video_context;
 
     /**
      * D3D11 configuration used to create the decoder
      */
     D3D11_VIDEO_DECODER_CONFIG *cfg;
 
     /**
      * The number of surface in the surface array
      */
     unsigned surface_count;
 
     /**
      * The array of Direct3D surfaces used to create the decoder
      */
     ID3D11VideoDecoderOutputView **surface;
 
     /**
      * A bit field configuring the workarounds needed for using the decoder
      */
     uint64_t workaround;
 
     /**

      * Private to the FFmpeg AVHWAccel implementation

      */
     unsigned report_id;

 
     /**
       * Mutex to access video_context
       */
     HANDLE  context_mutex;
 } AVD3D11VAContext;
 
 /**
  * Allocate an AVD3D11VAContext.
  *
  * @return Newly-allocated AVD3D11VAContext or NULL on failure.
  */
 AVD3D11VAContext *av_d3d11va_alloc_context(void);

 
 /**
  * @}
  */
 
 #endif /* AVCODEC_D3D11VA_H */