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| Unit SndVol; Interface Uses MMSystem, Dialogs;
Type TDeviceName = (Master, Microphone, WaveOut, Synth);
Function GetVolume(DN: TDeviceName): Word; Procedure SetVolume(DN: TDeviceName; Value: Word); Function GetVolumeMute(DN: TDeviceName): Boolean; Procedure SetVolumeMute(DN: TDeviceName; Value: Boolean);
Implementation
Var hMix: HMIXER; mxlc: MIXERLINECONTROLS; mxcd: TMIXERCONTROLDETAILS; vol: TMIXERCONTROLDETAILS_UNSIGNED; mcdMute: MIXERCONTROLDETAILS_BOOLEAN; mxc: MIXERCONTROL; mxl: TMIXERLINE; intRet, nMixerDevs: Integer;
Function GetVolume(DN: TDeviceName): Word; Begin nMixerDevs := mixerGetNumDevs(); If ((nMixerDevs < 1)) Then Exit; intRet := mixerOpen(@hMix, 0, 0, 0, 0); If (intRet = MMSYSERR_NOERROR) Then Begin Case DN Of Master: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS; Microphone: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; WaveOut: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; Synth: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; End; mxl.cbStruct := SizeOf(mxl); intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE); If (intRet = MMSYSERR_NOERROR) Then Begin FillChar(mxlc, SizeOf(mxlc), 0); mxlc.cbStruct := SizeOf(mxlc); mxlc.dwLineID := mxl.dwLineID; mxlc.dwControlType := MIXERCONTROL_CONTROLTYPE_VOLUME; mxlc.cControls := 1; mxlc.cbmxctrl := SizeOf(mxc); mxlc.pamxctrl := @mxc; intRet := mixerGetLineControls(hMix, @mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE); If (intRet = MMSYSERR_NOERROR) Then Begin FillChar(mxcd, SizeOf(mxcd), 0); mxcd.dwControlID := mxc.dwControlID; mxcd.cbStruct := SizeOf(mxcd); mxcd.cMultipleItems := 0; mxcd.cbDetails := SizeOf(Vol); mxcd.paDetails := @vol; mxcd.cChannels := 1; intRet := mixerGetControlDetails(hMix, @mxcd, MIXER_SETCONTROLDETAILSF_VALUE); Result := vol.dwValue; If (intRet <> MMSYSERR_NOERROR) Then ShowMessage('GetControlDetails Error'); End Else ShowMessage('GetLineInfo Error'); End; intRet := mixerClose(hMix); End; End;
Procedure setVolume(DN: TDeviceName; Value: Word); Begin nMixerDevs := mixerGetNumDevs(); If ((nMixerDevs < 1)) Then Exit; intRet := mixerOpen(@hMix, 0, 0, 0, 0); If (intRet = MMSYSERR_NOERROR) Then Begin Case DN Of Master: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS; Microphone: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; WaveOut: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; Synth: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; End; mxl.cbStruct := SizeOf(mxl); intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE); If (intRet = MMSYSERR_NOERROR) Then Begin FillChar(mxlc, SizeOf(mxlc), 0); mxlc.cbStruct := SizeOf(mxlc); mxlc.dwLineID := mxl.dwLineID; mxlc.dwControlType := MIXERCONTROL_CONTROLTYPE_VOLUME; mxlc.cControls := 1; mxlc.cbmxctrl := SizeOf(mxc); mxlc.pamxctrl := @mxc; intRet := mixerGetLineControls(hMix, @mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE); If (intRet = MMSYSERR_NOERROR) Then Begin FillChar(mxcd, SizeOf(mxcd), 0); mxcd.dwControlID := mxc.dwControlID; mxcd.cbStruct := SizeOf(mxcd); mxcd.cMultipleItems := 0; mxcd.cbDetails := SizeOf(Vol); mxcd.paDetails := @vol; mxcd.cChannels := 1; vol.dwValue := Value; intRet := mixerSetControlDetails(hMix, @mxcd, MIXER_SETCONTROLDETAILSF_VALUE); If (intRet <> MMSYSERR_NOERROR) Then ShowMessage('SetControlDetails Error'); End Else ShowMessage('GetLineInfo Error'); End; intRet := mixerClose(hMix); End; End;
Function GetVolumeMute(DN: TDeviceName): Boolean; Begin nMixerDevs := mixerGetNumDevs(); If ((nMixerDevs < 1)) Then Exit; intRet := mixerOpen(@hMix, 0, 0, 0, 0); If (intRet = MMSYSERR_NOERROR) Then Begin Case DN Of Master: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS; Microphone: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; WaveOut: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; Synth: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; End; mxl.cbStruct := SizeOf(mxl); intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE); If (intRet = MMSYSERR_NOERROR) Then Begin FillChar(mxlc, SizeOf(mxlc), 0); mxlc.cbStruct := SizeOf(mxlc); mxlc.dwLineID := mxl.dwLineID; mxlc.dwControlType := MIXERCONTROL_CONTROLTYPE_MUTE; mxlc.cControls := 1; mxlc.cbmxctrl := SizeOf(mxc); mxlc.pamxctrl := @mxc; intRet := mixerGetLineControls(hMix, @mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE); If (intRet = MMSYSERR_NOERROR) Then Begin FillChar(mxcd, SizeOf(mxcd), 0); mxcd.cbStruct := SizeOf(TMIXERCONTROLDETAILS); mxcd.dwControlID := mxc.dwControlID; mxcd.cChannels := 1; mxcd.cbDetails := SizeOf(MIXERCONTROLDETAILS_BOOLEAN); mxcd.paDetails := @mcdMute; intRet := mixerGetControlDetails(hMix, @mxcd, MIXER_SETCONTROLDETAILSF_VALUE); If (mcdMute.fValue = 0) Then Result := false Else Result := True; If (intRet <> MMSYSERR_NOERROR) Then ShowMessage('SetControlDetails Error'); End Else ShowMessage('GetLineInfo Error'); End; intRet := mixerClose(hMix); End; End;
Procedure SetVolumeMute(DN: TDeviceName; Value: Boolean); Begin nMixerDevs := mixerGetNumDevs(); If ((nMixerDevs < 1)) Then Exit; intRet := mixerOpen(@hMix, 0, 0, 0, 0); If (intRet = MMSYSERR_NOERROR) Then Begin Case DN Of Master: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS; Microphone: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; WaveOut: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; Synth: mxl.dwComponentType := MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; End; mxl.cbStruct := SizeOf(mxl); intRet := mixerGetLineInfo(hMix, @mxl, MIXER_GETLINEINFOF_COMPONENTTYPE); If (intRet = MMSYSERR_NOERROR) Then Begin FillChar(mxlc, SizeOf(mxlc), 0); mxlc.cbStruct := SizeOf(mxlc); mxlc.dwLineID := mxl.dwLineID; mxlc.dwControlType := MIXERCONTROL_CONTROLTYPE_MUTE; mxlc.cControls := 1; mxlc.cbmxctrl := SizeOf(mxc); mxlc.pamxctrl := @mxc; intRet := mixerGetLineControls(hMix, @mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE); If (intRet = MMSYSERR_NOERROR) Then Begin FillChar(mxcd, SizeOf(mxcd), 0); mxcd.cbStruct := SizeOf(TMIXERCONTROLDETAILS); mxcd.dwControlID := mxc.dwControlID; mxcd.cChannels := 1; mxcd.cbDetails := SizeOf(MIXERCONTROLDETAILS_BOOLEAN); mxcd.paDetails := @mcdMute; mcdMute.fValue := Ord(Value); intRet := mixerSetControlDetails(hMix, @mxcd, MIXER_SETCONTROLDETAILSF_VALUE); If (intRet <> MMSYSERR_NOERROR) Then ShowMessage('SetControlDetails Error'); End Else ShowMessage('GetLineInfo Error'); End; intRet := mixerClose(hMix); End; End;
End. |