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CPosPassThru.GetPreroll method

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[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetPreroll method retrieves the amount of data that will be queued before the start position. This method implements the IMediaSeeking::GetPreroll method.

Syntax

HRESULT GetPreroll(
   LONGLONG *pllPreroll
);

Parameters

pllPreroll

Pointer to a variable that receives the preroll time, in units of the current time format.

Return value

Returns the HRESULT value from the connected pin.

Requirements

Requirement Value
Header
Ctlutil.h (include Streams.h)
Library
Strmbase.lib (retail builds);
Strmbasd.lib (debug builds)

See also

CPosPassThru Class