我想用程序控制计算机的音量:主要是总音量和PC Speaker的音量,要在系统设置为静音时打开这两项以及将其调整到合适的位置,请问各位大虾该怎么办?
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//获取静音(GetVolumeMute(DN))及设置静音(SetVolumeMute(DN,Value))。
unit Volume;interfaceuses MMSystem, Dialogs;Type TDeviceName = (Master, Microphone, WaveOut, PCSpeaker,Depth,Synth,UNDEFINED,DIGITAL,LINEIN,CDPlayer,TELEPHONE,AUX);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
// Check if Mixer is available
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
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;
PCSpeaker: mxl.dwComponentType:= MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER;
Depth: mxl.dwComponentType:= MIXERLINE_COMPONENTTYPE_SRC_LAST;
UNDEFINED:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED;
DIGITAL:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_DIGITAL;
LINEIN:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_LINE;
CDPlayer:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC;
TELEPHONE:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE;
AUX:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY;
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;
intRet := 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
begin
Exit;
end; // 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;
PCSpeaker: mxl.dwComponentType:= MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER;
Depth: mxl.dwComponentType:= MIXERLINE_COMPONENTTYPE_SRC_LAST;
UNDEFINED:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED;
DIGITAL:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_DIGITAL;
LINEIN:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_LINE;
CDPlayer:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC;
TELEPHONE:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE;
AUX:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY;
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;
intRet := mixerClose(hMix);
end;
end;
function GetVolumeMute(DN:TDeviceName) : Boolean;
var
hMix: HMIXER;
mxlc: MIXERLINECONTROLS;
mxcd: TMIXERCONTROLDETAILS;
vol: TMIXERCONTROLDETAILS_UNSIGNED;
mxc: MIXERCONTROL;
mxl: TMixerLine;
intRet: Integer;
nMixerDevs: Integer;
mcdMute: MIXERCONTROLDETAILS_BOOLEAN;
begin
// Check if Mixer is available
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
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;
PCSpeaker: mxl.dwComponentType:= MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER;
Depth: mxl.dwComponentType:= MIXERLINE_COMPONENTTYPE_SRC_LAST;
UNDEFINED:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED;
DIGITAL:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_DIGITAL;
LINEIN:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_LINE;
CDPlayer:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC;
TELEPHONE:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE;
AUX:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY;
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; intRet := mixerClose(hMix);
end;
end;//设置静音
procedure SetVolumeMute(DN:TDeviceName; Value:Boolean);
var
hMix: HMIXER;
mxlc: MIXERLINECONTROLS;
mxcd: TMIXERCONTROLDETAILS;
vol: TMIXERCONTROLDETAILS_UNSIGNED;
mxc: MIXERCONTROL;
mxl: TMixerLine;
intRet: Integer;
nMixerDevs: Integer;
mcdMute: MIXERCONTROLDETAILS_BOOLEAN;
begin
// Check if Mixer is available
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
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;
PCSpeaker: mxl.dwComponentType:= MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER;
Depth: mxl.dwComponentType:= MIXERLINE_COMPONENTTYPE_SRC_LAST;
UNDEFINED:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED;
DIGITAL:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_DIGITAL;
LINEIN:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_LINE;
CDPlayer:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC;
TELEPHONE:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE;
AUX:mxl.dwComponentType:=MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY;
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; // Set and UnSet mute
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.