IAudioStreamVolume::GetChannelCount method
The GetChannelCount method retrieves the number of channels in the audio stream.
Syntax
HRESULT GetChannelCount( [out] UINT32 *pdwCount );
Parameters
- pdwCount [out]
-
Pointer to a UINT32 variable into which the method writes the channel count.
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 pdwCount is NULL. |
|
The audio endpoint device has been unplugged, or the audio hardware or associated hardware resources have been reconfigured, disabled, removed, or otherwise made unavailable for use. |
|
The Windows audio service is not running. |
Remarks
Call this method to get the number of channels in the audio stream before calling any of the other methods in the IAudioStreamVolume interface.
Requirements
|
Minimum supported client |
Windows Vista [desktop apps only] |
|---|---|
|
Minimum supported server |
Windows Server 2008 [desktop apps only] |
|
Header |
|
See also