IltmmCapture::get_Volume

#include "ltmm.h"

C Syntax

HRESULT IltmmCapture_get_Volume(pCapture, pVolume)

C++ Syntax

HRESULT get_Volume(pVolume)

IltmmCapture *pCapture;

pointer to an interface

long *pVolume;

pointer to a variable

Retrieves the volume level of the audio stream of the preview output .

Parameter

Description

pCapture

Pointer to an IltmmCapture interface.

pVolume

Pointer to a variable to be updated with the volume level of the audio stream. Possible values range from -10000 to 0. Divide the value by 100 to get the equivalent decibel value.

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.

Comments

Full volume is 0, and -10000 is silence. The scale is logarithmic.

This property gets only the volume level that is applied to the preview output.

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

Elements:

IltmmCapture::put_Volume

Topics:

Multimedia Function Groups

Example

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

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

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