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IKsReferenceClock::GetPhysicalTime method (ks.h)

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The IKsReferenceClock::GetPhysicalTime method queries the associated reference clock for the current physical time.

Syntax

LONGLONG GetPhysicalTime();

Return value

The IKsReferenceClock::GetPhysicalTime method returns the current physical time for the associated pin, specified by default in 100-nanosecond units.

Remarks

Physical time is tied to a physical clock, either the system clock or an on-board hardware clock.

The physical clock time progresses continuously. Unlike the presentation time, it is not reversible.

Clocks are not required to support a 100-nanosecond resolution. To determine the clock resolution, clients can use the KSPROPERTY_CLOCK_RESOLUTION request.

For more information, see AVStream Clocks.

AVStream uses the KSPROPERTY_CLOCK_PHYSICALTIME property to retrieve the physical time.

Requirements

Requirement Value
Target Platform Universal
Header ks.h (include Ks.h)

See also

KsPinGetReferenceClockInterface