modules/video_chroma/dxgi_fmt.h

   1 /*****************************************************************************
   2  * dxgi_fmt.h : DXGI helper calls
   3  *****************************************************************************
   4  * Copyright © 2015 VLC authors, VideoLAN and VideoLabs
   5  *
   6  * Authors: Steve Lhomme <robux4@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 #ifndef VLC_VIDEOCHROMA_DXGI_FMT_H_
  24 #define VLC_VIDEOCHROMA_DXGI_FMT_H_
  25
  26 #include <dxgi.h>
  27 #include <dxgiformat.h>
  28
  29 #include <vlc_common.h>
  30 #include <vlc_fourcc.h>
  31
  32 #define D3D11_MAX_SHADER_VIEW  3
  33
  34 typedef struct
  35 {
  36     const char   *name;
  37     DXGI_FORMAT  formatTexture;
  38     vlc_fourcc_t fourcc;
  39     uint8_t      bitsPerChannel;
  40     uint8_t      widthDenominator;
  41     uint8_t      heightDenominator;
  42     DXGI_FORMAT  resourceFormat[D3D11_MAX_SHADER_VIEW];
  43 } d3d_format_t;
  44
  45 extern const char *DxgiFormatToStr(DXGI_FORMAT format);
  46 extern vlc_fourcc_t DxgiFormatFourcc(DXGI_FORMAT format);
  47 extern const d3d_format_t *GetRenderFormatList(void);
  48 extern void DxgiFormatMask(DXGI_FORMAT format, video_format_t *);
  49
  50 typedef struct ID3D11Device ID3D11Device;
  51 bool isXboxHardware(ID3D11Device *d3ddev);
  52 bool isNvidiaHardware(ID3D11Device *d3ddev);
  53 IDXGIAdapter *D3D11DeviceAdapter(ID3D11Device *d3ddev);
  54
  55 static inline bool DeviceSupportsFormat(ID3D11Device *d3ddevice,
  56                                         DXGI_FORMAT format, UINT supportFlags)
  57 {
  58     UINT i_formatSupport;
  59     return SUCCEEDED( ID3D11Device_CheckFormatSupport(d3ddevice, format,
  60                                                       &i_formatSupport) )
  61             && ( i_formatSupport & supportFlags ) == supportFlags;
  62 }
  63
  64 static inline const d3d_format_t *FindD3D11Format(ID3D11Device *d3ddevice,
  65                                                   vlc_fourcc_t i_src_chroma,
  66                                                   uint8_t bits_per_channel,
  67                                                   bool allow_opaque,
  68                                                   UINT supportFlags)
  69 {
  70     supportFlags |= D3D11_FORMAT_SUPPORT_TEXTURE2D;
  71     for (const d3d_format_t *output_format = GetRenderFormatList();
  72          output_format->name != NULL; ++output_format)
  73     {
  74         if (i_src_chroma && i_src_chroma != output_format->fourcc)
  75             continue;
  76         if (bits_per_channel && bits_per_channel > output_format->bitsPerChannel)
  77             continue;
  78         if (!allow_opaque && (output_format->fourcc == VLC_CODEC_D3D11_OPAQUE ||
  79                               output_format->fourcc == VLC_CODEC_D3D11_OPAQUE_10B))
  80             continue;
  81
  82         DXGI_FORMAT textureFormat;
  83         if (output_format->formatTexture == DXGI_FORMAT_UNKNOWN)
  84             textureFormat = output_format->resourceFormat[0];
  85         else
  86             textureFormat = output_format->formatTexture;
  87
  88         if( DeviceSupportsFormat( d3ddevice, textureFormat, supportFlags ) )
  89             return output_format;
  90     }
  91     return NULL;
  92 }
  93
  94 #endif /* include-guard */