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IMFAudioStreamVolume::GetAllVolumes method (mfidl.h)

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

Syntax

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

Parameters

[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.

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.

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

IMFAudioStreamVolume

Streaming Audio Renderer