Redigera

Dela via


CSystemClock.SetClockDelta method

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The SetClockDelta method adjusts the clock time. This method implements the IAMClockAdjust::SetClockDelta method.

Syntax

HRESULT SetClockDelta(
   REFERENCE_TIME rtDelta
);

Parameters

rtDelta

Specifies the amount by which to adjust the clock, as a REFERENCE_TIME value. A positive value moves the clock forward, and a negative value moves the clock backward.

Return value

Returns S_OK or an HRESULT error code.

Remarks

This method simply calls CBaseReferenceClock::SetTimeDelta.

The time values returned by IReferenceClock::GetTime are monotonically increasing. If you set the clock back, GetTime continues to report the old time until the internal clock catches up.

Requirements

Requirement Value
Version
CSystemClock Class
Header
Sysclock.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)