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PDD_VPORTCB_WAITFORSYNC callback function (ddrawint.h)

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The DdVideoPortWaitForSync callback function waits until the next vertical synch occurs.

Syntax

PDD_VPORTCB_WAITFORSYNC PddVportcbWaitforsync;

DWORD PddVportcbWaitforsync(
  PDD_WAITFORVPORTSYNCDATA unnamedParam1
)
{...}

Parameters

unnamedParam1

Points to a DD_WAITFORVPORTSYNCDATA structure that contains the information required for the driver to synchronize the VPE object.

Return value

DdVideoPortWaitForSync returns one of the following callback codes:

Remarks

If the condition on which the driver is waiting does not occur before the number of milliseconds specified in the dwTimeOut member of the DD_WAITFORVPORTSYNCDATA structure at lpWaitForSync has elapsed, the driver should set the ddRVal member of DD_WAITFORVPORTSYNCDATA to DDERR_VIDEONOTACTIVE and return DDHAL_DRIVER_HANDLED.

The driver must specify its own time-out criteria when dwTimeOut is zero.

Requirements

Requirement Value
Target Platform Desktop
Header ddrawint.h (include Winddi.h)

See also

DD_WAITFORVPORTSYNCDATA