VideoPortStopTimer function (video.h)

Article
02/22/2024

The VideoPortStopTimer function disables calls to a miniport driver's HwVidTimer function.

Syntax

VIDEOPORT_DEPRECATED VIDEOPORT_API VOID VideoPortStopTimer(
  PVOID HwDeviceExtension
);

Parameters

HwDeviceExtension

Pointer to the miniport driver's device extension. This pointer is the input parameter to the HwVidTimer function.

Return value

None

Remarks

After a miniport driver calls VideoPortStartTimer, its HwVidTimer function is called at approximately one-second intervals until the miniport driver calls VideoPortStopTimer. A miniport driver's HwVidTimer function must not call VideoPortStopTimer.

A miniport driver cannot call VideoPortStartTimer or VideoPortStopTimer if its DriverEntry function set the HwTimer member of the VIDEO_HW_INITIALIZATION_DATA structure to NULL.

Requirements

Requirement	Value
Minimum supported client	Available in Windows 2000 and later versions of the Windows operating systems.
Target Platform	Desktop
Header	video.h (include Video.h)
Library	Videoprt.lib
DLL	Videoprt.sys
IRQL	<=DISPATCH_LEVEL