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IAudioPeakMeter::GetLevel

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IAudioPeakMeter::GetLevel

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.

HRESULT GetLevel(
  UINT  nChannel,
  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 code Description
E_INVALIDARG Parameter nChannel is out of range.
E_POINTER Pointer pfLevel is NULL.

Requirements

Client: Windows Vista

Header: Include Devicetopology.h.

See Also

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