IMFSimpleAudioVolume::SetMasterVolume method (mfidl.h)
Sets the master volume level.
Syntax
HRESULT SetMasterVolume(
[in] float fLevel
);
Parameters
[in] fLevel
Volume level. Volume is expressed as an attenuation level, where 0.0 indicates silence and 1.0 indicates full volume (no attenuation).
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
|
The audio renderer is not initialized. |
|
The audio renderer was removed from the pipeline. |
Remarks
Events outside of the application can change the master volume level. For example, the user can change the volume from the system volume-control program (SndVol). If an external event changes the master volume, the audio renderer sends an MEAudioSessionVolumeChanged event, which the Media Session forwards to the application.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2008 [desktop apps only] |
| Target Platform | Windows |
| Header | mfidl.h |
| Library | Mfuuid.lib |