IAMTimeline::GetCountOfType 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]

Note

[Deprecated. This API may be removed from future releases of Windows.]

 

The GetCountOfType method retrieves the number of objects of the specified type that are contained in a specified group and all of its children.

Syntax

HRESULT GetCountOfType(
   long                Group,
   long                *pVal,
   long                *pValWithComps,
   TIMELINE_MAJOR_TYPE MajorType
);

Parameters

Group

Index number of the group for which to retrieve the count.

pVal

Receives the number of objects of the specified type contained in the group and all of its virtual tracks, recursively.

pValWithComps

Receives the count returned in pVal plus the number of compositions searched, including this one.

MajorType

Member of the TIMELINE_MAJOR_TYPE enumerated type, specifying the type of object to count.

Return value

Returns one of the following HRESULT values.

Return code	Description
S_OK	Success.
E_INVALIDARG	Invalid group number.
E_POINTER	NULL pointer argument.

 

Remarks

Calling this method is equivalent to calling IAMTimelineComp::GetCountOfType on the specified group. See the Remarks section of that method for more information.

Typically, an application will not call this method. It is called internally by the render engine.

Note

The header file Qedit.h is not compatible with Direct3D headers later than version 7.

 

Note

To obtain Qedit.h, download the Microsoft Windows SDK Update for Windows Vista and .NET Framework 3.0. Qedit.h is not available in the Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 Service Pack 1.

 

Requirements

Requirement	Value
Header	Qedit.h
Library	Strmiids.lib

See also

IAMTimeline Interface

Error and Success Codes