IDirectXVideoDecoderService::GetDecoderDeviceGuids method

Retrieves an array of GUIDs that identifies the decoder devices supported by the graphics hardware.

Syntax


HRESULT GetDecoderDeviceGuids(
  [out]  UINT *Count,
  [out]  GUID **pGuids
);

Parameters

Count [out]

Receives the number of GUIDs.

pGuids [out]

Receives an array of GUIDs. The size of the array is retrieved in the Count parameter. The method allocates the memory for the array. The caller must free the memory by calling CoTaskMemFree.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return codeDescription
S_OK

The method succeeded.

D3DERR_INVALIDCALL

Error from the Direct3D device.

E_FAIL

If the Microsoft Basic Display Adapter is being used or the Direct3D 11 device type is the reference rasterizer. These devices do not support video decoders.

 

Remarks

The following decoder GUIDs are defined. Some of these GUIDs have alternate names, shown in parentheses.

GUIDDescription
DXVA2_ModeH264_A (DXVA2_ModeH264_MoComp_NoFGT)H.264 motion compensation (MoComp), no film grain technology (FGT).
DXVA2_ModeH264_B (DXVA2_ModeH264_MoComp_FGT)H.264 MoComp, FGT.
DXVA2_ModeH264_C (DXVA2_ModeH264_IDCT_NoFGT)H.264 inverse discrete cosine transform (IDCT), no FGT.
DXVA2_ModeH264_D (DXVA2_ModeH264_IDCT_FGT)H.264 IDCT, FGT.
DXVA2_ModeH264_E (DXVA2_ModeH264_VLD_NoFGT)H.264 VLD, no FGT.
DXVA2_ModeH264_F (DXVA2_ModeH264_VLD_FGT)H.264 variable-length decoder (VLD), FGT.
DXVA2_ModeMPEG2_IDCTMPEG-2 IDCT.
DXVA2_ModeMPEG2_MoCompMPEG-2 MoComp.
DXVA2_ModeMPEG2_VLDMPEG-2 VLD.
DXVA2_ModeVC1_A (DXVA2_ModeVC1_PostProc)VC-1 post processing.
DXVA2_ModeVC1_B (DXVA2_ModeVC1_MoComp)VC-1 MoComp.
DXVA2_ModeVC1_C (DXVA2_ModeVC1_IDCT)VC-1 IDCT.
DXVA2_ModeVC1_D (DXVA2_ModeVC1_VLD)VC-1 VLD.
DXVA2_ModeWMV8_A (DXVA2_ModeWMV8_PostProc)Windows Media Video 8 post processing.
DXVA2_ModeWMV8_B (DXVA2_ModeWMV8_MoComp)Windows Media Video 8 MoComp.
DXVA2_ModeWMV9_A (DXVA2_ModeWMV9_PostProc)Windows Media Video 9 post processing.
DXVA2_ModeWMV9_B (DXVA2_ModeWMV9_MoComp)Windows Media Video 9 MoComp.
DXVA2_ModeWMV9_C (DXVA2_ModeWMV9_IDCT)Windows Media Video 9 IDCT.

 

Requirements

Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]

Header

Dxva2api.h

See also

IDirectXVideoDecoderService
DirectX Video Acceleration 2.0

 

 

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