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PDX_GETPREVIOUSAUTOFLIP callback function (dxmini.h)

  • Article

The DxGetPreviousAutoflip callback function is called when the device is hardware autoflipping and a client of the video miniport driver wants to know which surface received the previous field of video data for capture purposes.

Syntax

PDX_GETPREVIOUSAUTOFLIP PdxGetpreviousautoflip;

DWORD PdxGetpreviousautoflip(
  PVOID unnamedParam1,
  PDDGETPREVIOUSAUTOFLIPININFO unnamedParam2,
  PDDGETPREVIOUSAUTOFLIPOUTINFO unnamedParam3
)
{...}

Parameters

unnamedParam1

Points to the miniport driver's device extension.

unnamedParam2

Points to a DDGETPREVIOUSAUTOFLIPININFO structure that contains the video port extensions (VPE) object information.

unnamedParam3

Points to a DDGETPREVIOUSAUTOFLIPOUTINFO structure that contains the index of the autoflip chain.

Return value

DxGetPreviousAutoflip returns DX_OK if it succeeds; otherwise, it returns one of the following error values:

Remarks

If interleaving, the surface that received the previous field may be the same surface that is receiving the current field.

DxGetPreviousAutoflip returns the index in the autoflip chain of the correct surface in the dwSurfaceIndex member of the DDGETPREVIOUSAUTOFLIPOUTINFO structure at GetPreviousAutoflipOutInfo.

Requirements

Requirement Value
Target Platform Desktop
Header dxmini.h (include Dxmini.h)

See also

DDGETPREVIOUSAUTOFLIPININFO

DDGETPREVIOUSAUTOFLIPOUTINFO