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IAMAudioInputMixer::put_MixLevel method (strmif.h)

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The put_MixLevel method sets the recording level for this input.

Syntax

HRESULT put_MixLevel(
  [in] double Level
);

Parameters

[in] Level

Specifies the recording level. The following values are possible.

Value Description
0.0 to 1.0 Zero indicates that the recording level is off; the value 1.0 indicates that the recording level is at full volume. Intermediate values are also allowed.
AMF_AUTOMATICGAIN Enable automatic adjustment of the recording level.

Return value

Returns an HRESULT value. Possible values include the following.

Return code Description
S_OK
 Success.
E_NOTIMPL
 This filter does not support the AMF_AUTOMATICGAIN flag.
E_INVALIDARG
 Invalid argument.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header strmif.h (include Dshow.h)
Library Strmiids.lib

See also

Error and Success Codes

IAMAudioInputMixer Interface

IAMAudioInputMixer::get_MixLevel