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IAudioPeakMeter::GetLevel method

The GetLevel method gets the peak level that the peak meter recorded for the specified channel since the peak level for that channel was previously read.

Syntax


HRESULT GetLevel(
  [in]   UINT nChannel,
  [out]  float *pfLevel
);

Parameters

nChannel [in]

The channel number. If the audio stream has N channels, the channels are numbered from 0 to N– 1. To get the number of channels in the stream, call the IAudioPeakMeter::GetChannelCount method.

pfLevel [out]

Pointer to a float variable into which the method writes the peak meter level in decibels.

Return value

If the method succeeds, it returns S_OK. If it fails, possible return codes include, but are not limited to, the values shown in the following table.

Return codeDescription
E_INVALIDARG

Parameter nChannel is out of range.

E_POINTER

Pointer pfLevel is NULL.

 

Requirements

Minimum supported client

Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 [desktop apps only]

Header

Devicetopology.h

See also

IAudioPeakMeter Interface
IAudioPeakMeter::GetChannelCount

 

 

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