Mega Code Archive
How to set the volume for the microphone mute it (enhanced)
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Title: How to set the volume for the microphone/ mute it (enhanced)
function SetMicrophoneVolume(bValue: Word): Boolean;
var {0..65535}
hMix: HMIXER;
mxlc: MIXERLINECONTROLS;
mxcd: TMIXERCONTROLDETAILS;
vol: TMIXERCONTROLDETAILS_UNSIGNED;
mxc: MIXERCONTROL;
mxl: TMixerLine;
intRet: Integer;
nMixerDevs: Integer;
begin
// Check if Mixer is available
// ¨¹berpr¨¹fen, ob ein Mixer vorhanden
nMixerDevs := mixerGetNumDevs();
if (nMixerDevs 1) then
begin
Exit;
end;
// open the mixer
intRet := mixerOpen(@hMix, 0, 0, 0, 0);
if intRet = MMSYSERR_NOERROR then
begin
mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;
mxl.cbStruct := SizeOf(mxl);
{*} // this option will tell the compiler which line destination to take:
{*} // 0 - PLAYBACK destination
{*} // 1 - RECORD destination
{*} // this time the compiler will take control of recording microphone line
{*} mxl.dwDestination := 1;
// get line info
intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
//...
end;
end;
//...
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