IltmmCapture::IsPreviewTapSupported

#include "ltmm.h"

C Syntax

HRESULT IltmmCapture_IsPreviewTapSupported(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.

Platforms

Win32, x64

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++.

Help Version 21.0.2021.7.19
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