LEADTOOLS Media Foundation Help
| LEADTOOLS Media Foundation Help > LEADTOOLS Media Foundation Features > Media Foundation Function References > IltmfCapture Interface > IltmfCapture::get_Volume |
The portion of the file holding the audio data. The audio data might be compressed to save disk space. The data has to be decompressed using an audio decompressor before you can play (hear) it.
oftware component which decompresses audio. It must be designed to work with ACM or MediaFoundation. Note that different compression methods require different decompressors. There is no universal decompressor capable of decoding all compressed streams.
#include "ltmf.h"
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C Syntax |
HRESULT IltmfCapture_get_Volume(pCapture, pVal) |
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C++ Syntax |
HRESULT get_Volume(pVal) |
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IltmfCapture *pCapture; |
/* pointer to an interface */ |
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long *pVal; |
/* pointer to a variable */ |
Retrieves the volume level of the audio stream .
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Parameter |
Description |
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pCapture |
Pointer to an IltmfCapture interface. |
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pVal |
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
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S_OK |
The function was successful. |
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<> S_OK |
An error occurred. Refer to the Error Codes or the HRESULT error codes in the MediaFoundation documentation. |
Comments
Full volume is 0, and 10000 is silence. The scale is logarithmic.
Required DLLs and Libraries
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LTMF For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Win32, x64
See Also
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Elements: |
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Topics: |
Example
For a C++ example, refer to Using Mute with ltmfCapture Example for C++.
