VideoPortStartTimer

VOID VideoPortStartTimer(

PVOID  HwDeviceExtension
);

VideoPortStartTimer enables calls to a miniport’s HwVidTimer function.

Parameters

HwDeviceExtension

Points to the miniport driver’s device extension. This pointer is the input parameter to the HwVidTimer function.

Comments

After a miniport driver calls VideoPortStartTimer, its HwVidTimer function is called periodically at approximate one-second intervals until the driver calls 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.

A miniport’s HwVidTimer function can call VideoPortStopTimer. Only another miniport function can re-enable calls to HwVidTimer by calling VideoPortStartTimer again.

See Also

DriverEntry, HwVidTimer, VIDEO_HW_INITIALIZATION_DATA, VideoPortStopTimer