IMFSimpleAudioVolume::GetMasterVolume method (mfidl.h)

Retrieves the master volume level.

Syntax

HRESULT GetMasterVolume(
  [out] float *pfLevel
);

Parameters

[out] pfLevel

Receives the 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
S_OK
The method succeeded.
MF_E_NOT_INITIALIZED
The audio renderer is not initialized.
MF_E_STREAMSINK_REMOVED
The audio renderer was removed from the pipeline.

Remarks

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

See also

IMFSimpleAudioVolume

Streaming Audio Renderer