Function

CVGetHostClockFrequency

Returns the frequency of updates to the system time.

Declaration

double CVGetHostClockFrequency(void);

Return Value

The current host frequency.

Discussion

In macOS, the host time bases for Core Video and CoreAudio are identical—both are based on the mach_absolute_time function—so the values returned from either API can be used interchangeably.

See Also

Inspecting the Host Clock

CVGetCurrentHostTime

Returns the current system time.

CVGetHostClockMinimumTimeDelta

Returns the smallest possible increment in the system time.