Delphi 内进行音量控制及静音
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unit UMute; 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 //获取音量 function GetVolume(DN:TDeviceName) : Word; var hMix: HMIXER; mxlc: MIXERLINECONTROLS; mxcd: TMIXERCONTROLDETAILS; vol: TMIXERCONTROLDETAILS_UNSIGNED; mxc: MIXERCONTROL; mxl: TMixerLine; intRet: Integer; nMixerDevs: Integer; begin Result:=0; // Check if Mixer is available nMixerDevs := mixerGetNumDevs(); if (nMixerDevs < 1) then Exit; // open the mixer 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); // get line info 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; mixerClose(hMix); end; end; //设置音量 procedure setVolume(DN:TDeviceName; Value : Word); var hMix: HMIXER; mxlc: MIXERLINECONTROLS; mxcd: TMIXERCONTROLDETAILS; vol: TMIXERCONTROLDETAILS_UNSIGNED; mxc: MIXERCONTROL; mxl: TMixerLine; intRet: Integer; nMixerDevs: Integer; begin // Check if Mixer is available nMixerDevs := mixerGetNumDevs(); if (nMixerDevs < 1) then Exit; // open the mixer 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); // get line info 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; mixerClose(hMix); end; end; //获取静音 function GetVolumeMute(DN:TDeviceName) : Boolean; var hMix: HMIXER; mxlc: MIXERLINECONTROLS; mxcd: TMIXERCONTROLDETAILS; mxc: MIXERCONTROL; mxl: TMixerLine; intRet: Integer; nMixerDevs: Integer; mcdMute: MIXERCONTROLDETAILS_BOOLEAN; begin // Check if Mixer is available nMixerDevs := mixerGetNumDevs(); Result:=False; if (nMixerDevs < 1) then Exit; // open the mixer 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); // mixerline info 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; // Get the mute control 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; // Get mute 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; end; end; //获取静音 procedure SetVolumeMute(DN:TDeviceName; Value:Boolean); var hMix: HMIXER; mxlc: MIXERLINECONTROLS; mxcd: TMIXERCONTROLDETAILS; mxc: MIXERCONTROL; mxl: TMixerLine; intRet: Integer; nMixerDevs: Integer; mcdMute: MIXERCONTROLDETAILS_BOOLEAN; begin // Check if Mixer is available nMixerDevs := mixerGetNumDevs(); if (nMixerDevs < 1) then Exit; // open the mixer 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); // mixerline info 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; // Get the mute control 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; if Value then mcdMute.fValue:=1 else mcdMute.fValue:=0; // Get mute intRet := mixerSetControlDetails(hMix, @mxcd, MIXER_SETCONTROLDETAILSF_VALUE); if intRet <> MMSYSERR_NOERROR then ShowMessage(‘SetControlDetails Error‘); end else ShowMessage(‘GetLineInfo Error‘); end; end; end; end. --------------------- 作者：belllab 来源：CSDN 原文：https://blog.csdn.net/belllab/article/details/1554101 版权声明：本文为博主原创文章，转载请附上博文链接！
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