IPerChannelDbLevel::GetLevel method
The GetLevel method gets the volume level, in decibels, of the specified channel.
Syntax
HRESULT GetLevel( [in] UINT nChannel, [out] float *pfLevelDB );
Parameters
- nChannel [in]
-
The channel number. If the audio stream has N channels, the channels are numbered from 0 to N– 1. To get the number of channels in the stream, call the IPerChannelDbLevel::GetChannelCount method.
- pfLevelDB [out]
-
Pointer to a float variable into which the method writes the volume level, in decibels, of the specified channel.
Return value
If the method succeeds, it returns S_OK. If it fails, possible return codes include, but are not limited to, the values shown in the following table.
| Return code | Description |
|---|---|
|
Parameter nChannel is out of range. |
|
Pointer pfLevelDB is NULL. |
Requirements
|
Minimum supported client |
Windows Vista [desktop apps only] |
|---|---|
|
Minimum supported server |
Windows Server 2008 [desktop apps only] |
|
Header |
|
See also