IPerChannelDbLevel::GetLevel
IPerChannelDbLevel::GetLevel
The GetLevel method gets the volume level, in decibels, of the specified channel.
HRESULT GetLevel( UINT nChannel, 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 |
E_INVALIDARG | Parameter nChannel is out of range. |
E_POINTER | Pointer pfLevelDB is NULL. |
Requirements
Client: Windows Vista
Header: Include Devicetopology.h.
See Also