// d3dumddi.h

PFND3DDDI_DECODEBEGINFRAME Pfnd3dddiDecodebeginframe;

HRESULT Pfnd3dddiDecodebeginframe(
  HANDLE hDevice,
  D3DDDIARG_DECODEBEGINFRAME *unnamedParam2
)
{...}
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Windows Driver Kit DDI reference (nc-d3dumddi-pfnd3dddi_decodebeginframe)

PFND3DDDI_DECODEBEGINFRAME callback function

Description

The DecodeBeginFrame function notifies the user-mode display driver that decoding can begin on the specified Microsoft DirectX Video Accelerator (VA) decode device.

Parameters

`hDevice`

A handle to the display device (graphics context).

`unnamedParam2`

pData [in]

A pointer to a D3DDDIARG_DECODEBEGINFRAME structure that describes information for the DirectX VA decoder to start decoding a frame.

Return value

DecodeBeginFrame returns one of the following values:

Return code	Description
S_OK	Decoding successfully began.
E_OUTOFMEMORY	DecodeBeginFrame could not allocate the required memory for it to complete.

Remarks

The DecodeBeginFrame function notifies the user-mode display driver that its DecodeExecute function can be called on the specified decode device.

PFND3DDDI_DECODEBEGINFRAME - NtDoc