PFND3DWDDM2_0DDI_VIDEODECODERENABLEDOWNSAMPLING callback function (d3d10umddi.h)

Article
04/01/2021

Indicates that decoder down-sampling will be used and that the driver should allocate the appropriate reference frames. Optional for Windows Display Driver Model (WDDM) 2.0 or later drivers.

Syntax

PFND3DWDDM2_0DDI_VIDEODECODERENABLEDOWNSAMPLING Pfnd3dwddm20DdiVideodecoderenabledownsampling;

HRESULT Pfnd3dwddm20DdiVideodecoderenabledownsampling(
  D3D10DDI_HDEVICE hDevice,
  D3D11_1DDI_HDECODE hDecoder,
  D3DDDI_COLOR_SPACE_TYPE InputColorSpace,
  const D3D11_1DDI_VIDEO_DECODER_DESC *pOutputDesc,
  D3DDDI_COLOR_SPACE_TYPE OutputColorSpace,
  UINT ReferenceFrameCount
)
{...}

Parameters

hDevice

A handle to the display device (graphics context). The Direct3D runtime passed the user-mode driver this handle as the hDevice member of the D3DDDIARG_CREATEDEVICE structure at device creation.

hDecoder

A handle to the decoder object.

InputColorSpace

A D3DDDI_COLOR_SPACE_TYPE value that indicates the color space information of the reference frame data.

pOutputDesc

Indicates the resolution and the format of the output/display frames. This is the destination resolution and format of the down-sample operation.

Note The decode profile member (Guid) of pOutputDesc can be ignored.

OutputColorSpace

A D3DDDI_COLOR_SPACE_TYPE value that indicates the color space information of the output/display frames.

ReferenceFrameCount

Indicates the number of reference frame used.

Return value

If this callback function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

This function can only be called once, prior to the first VideoDecoderBeginFrame call.

Requirements

Requirement	Value
Minimum supported client	Windows 10
Minimum supported server	Windows Server 2016
Target Platform	Desktop
Header	d3d10umddi.h (include D3d10umddi.h)