BASS WAS API

BASS_WASAPI_GetVolume

Retrieves the current volume level.

float BASS_WASAPI_GetVolume(
    DWORD mode
);

Parameters

mode

The type of volume to get and the curve to use.

BASS_WASAPI_VOL_SESSION	Get the session volume, else the device volume.
BASS_WASAPI_CURVE_DB	Use a logarithmic curve. This is the default if no curve is specified.
BASS_WASAPI_CURVE_LINEAR	Use a linear curve.
BASS_WASAPI_CURVE_WINDOWS	Use Windows' hybrid curve, as used by Windows' volume controls.

Return value

If successful, the volume level is returned, else -1 is returned. Use BASS_ErrorGetCode to get the error code.

Error codes

BASS_ERROR_INIT	BASS_WASAPI_Init has not been successfully called.
BASS_ERROR_NOTAVAIL	Volume control is unavailable.
BASS_ERROR_UNKNOWN	Some other mystery problem!

Remarks

Session volume always uses the BASS_WASAPI_CURVE_WINDOWS curve.

When using multiple devices, the current thread's device setting (as set with BASS_WASAPI_SetDevice) determines which device this function call applies to.