IMFAudioStreamVolume::GetAllVolumes method (mfidl.h)

Retrieves the volume levels for all of the channels in the audio stream.

HRESULT GetAllVolumes(
  [in]  UINT32 dwCount,
  [out] float  *pfVolumes
);

[in] dwCount

Number of elements in the pfVolumes array. The value must equal the number of channels. To get the number of channels, call IMFAudioStreamVolume::GetChannelCount.

[out] pfVolumes

Address of an array of size dwCount, allocated by the caller. The method fills the array with the volume level for each channel in the stream.

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

IMFAudioStreamVolume

Streaming Audio Renderer