IltmmCapture::IsPreviewTapSupported

#include "ltmm.h"

C Syntax

HRESULT IltmmCapture_IsPreviewTabSupported(pCapture, Source, Tap, pVal)

C++ Syntax

HRESULT IsPreviewTabSupported(Source, Tap, pVal)

 

IltmmCapture *pCapture;

/* pointer to an interface */

long Source;

/* source type */

long Tap;

/* tap type */

VARIANT_BOOL *pVal;

/* pointer to a variable */

Determines whether a specific preview tap for some preview source is available or not.

Parameter

Description

pCapture

Pointer to an IltmmCapture interface.

Source

The preview source for which to determine whether a preview tap is supported. Possible values are:

 

Value

 

ltmmCapture_Preview_VideoAndAudio

 

ltmmCapture_Preview_Video

 

ltmmCapture_Preview_Audio

Tap

The preview tap type for which to determine whether it is supported. Possible values are:

 

Value

 

ltmmCapture_PreviewTap_Source

 

ltmmCapture_PreviewTap_Processors

 

ltmmCapture_PreviewTap_Compressor

pVal

Pointer to a variable to be updated with a value that indicates whether the specified source and tap are supported. Possible values are:

 

Value

Meaning

 

VARIANT_TRUE

Preview tap supported.

 

VARIANT_FALSE

Preview tap not supported.

Returns

S_OK

The function was successful.

<> S_OK

An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

Required DLLs and Libraries

LTMM

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Topics:

Multimedia Function Group

Example

For a C example, refer to IltmmCapture::IsPreviewTapSupported Example for C.

For a C++ example, refer to IltmmCapture::IsPreviewTapSupported Example for C++.