关于window录音机录音控制设定问题? 运行 SNDVOL32.EXE /R可打开录音控制面板,会看到录音控制面板的下方有三个选项,请教一下如何通过程序来选择这三个选项? 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 mute the master volume of your soundcard?uses MMSystem; function GetMasterMute( Mixer: hMixerObj; var Control: TMixerControl): MMResult; // Returns True on success var Line: TMixerLine; Controls: TMixerLineControls; begin ZeroMemory(@Line, SizeOf(Line)); Line.cbStruct := SizeOf(Line); Line.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS; Result := mixerGetLineInfo(Mixer, @Line, MIXER_GETLINEINFOF_COMPONENTTYPE); if Result = MMSYSERR_NOERROR then begin ZeroMemory(@Controls, SizeOf(Controls)); Controls.cbStruct := SizeOf(Controls); Controls.dwLineID := Line.dwLineID; Controls.cControls := 1; Controls.dwControlType := MIXERCONTROL_CONTROLTYPE_MUTE; Controls.cbmxctrl := SizeOf(Control); Controls.pamxctrl := @Control; Result := mixerGetLineControls(Mixer, @Controls, MIXER_GETLINECONTROLSF_ONEBYTYPE); end; end; procedure SetMasterMuteValue( Mixer: hMixerObj; Value: Boolean); var MasterMute: TMixerControl; Details: TMixerControlDetails; BoolDetails: TMixerControlDetailsBoolean; Code: MMResult; begin Code := GetMasterMute(0, MasterMute); if Code = MMSYSERR_NOERROR then begin with Details do begin cbStruct := SizeOf(Details); dwControlID := MasterMute.dwControlID; cChannels := 1; cMultipleItems := 0; cbDetails := SizeOf(BoolDetails); paDetails := @BoolDetails; end; LongBool(BoolDetails.fValue) := Value; Code := mixerSetControlDetails(0, @Details, MIXER_SETCONTROLDETAILSF_VALUE); end; if Code <> MMSYSERR_NOERROR then raise Exception.CreateFmt('SetMasterMuteValue failure, '+ 'multimedia system error #%d', [Code]); end; // Example: procedure TForm1.Button1Click(Sender: TObject); begin SetMasterMuteValue(0, CheckBox1.Checked); // Mixer device #0 mute on/off end; ---------------------------------------mixerSetControlDetailsauxoutsetvolume 是控制CD音量的 waveOutSetVolume 是控制波形的 midiOutSetVolume 是控制FM或者是synthesizerunit Volume; interface uses windows,mmsystem; type Tvolume=record left,right:word; // 取值范围 0--65535 end; procedure fillstruct(control:PMixerControl;var Cdetails:tMIXERCONTROLDETAILS); function getpeak(control:PMixerControl;var peak:integer):boolean; function setvolume(control:Pmixercontrol; volume:Tvolume):boolean; function getvolume(control:Pmixercontrol; volume:Tvolume):boolean; var mcontrols:array of array of array of PMixerControl; //mixer的数组,单声卡可以不用 fmixerhandle:HMIXER; //mixer的句柄 implementation procedure fillstruct(control:PMixerControl;var Cdetails:tMIXERCONTROLDETAILS); begin Cdetails.cbStruct:=sizeof(cdetails); cdetails.dwControlID:=Control.dwControlID; cdetails.cbDetails:=sizeof(integer); cdetails.hwndOwner:=0; end; function getpeak(control:PMixerControl;var peak:integer):boolean; var details:TMixerControlDetailsSigned; cdetails:tMIXERCONTROLDETAILS; begin Result:=false; if control.dwControlType<> mixercontrol_controltype_peakmeter then exit; cdetails.cChannels:=1; cdetails.paDetails:=@details; fillstruct(control,cdetails); result:=mixerGetControlDetails(fmixerhandle,@cdetails,MIXER_GETCONTROLDETAILSF_VALUE)=0; end; function setvolume(control:Pmixercontrol; volume:Tvolume):boolean; var details:array[0..30] of integer; cdetails:tMIXERCONTROLDETAILS; begin fillstruct(control,cdetails); cdetails.cChannels:=2; cdetails.paDetails:=@details; details[0]:=volume.left; details[1]:=volume.right; result:=mixerSetControlDetails(fmixerhandle,@cdetails,MIXER_GETCONTROLDETAILSF_VALUE)=0; volume.left:=details[0]; volume.right:=details[1]; end; function getvolume(control:Pmixercontrol; volume:Tvolume):boolean; var details:array[0..30] of integer; cdetails:tMIXERCONTROLDETAILS; begin fillstruct(control,cdetails); cdetails.cChannels:=2; cdetails.paDetails:=@details; result:=mixerGetControlDetails(fmixerhandle,@cdetails,MIXER_GETCONTROLDETAILSF_VALUE)=0; volume.left:=details[0]; volume.right:=details[1]; end; end. // 调用方法: procedure TForm1.Button1Click(Sender: TObject); var s : Tvolume; kz : Pmixercontrol; begin new(kz); //<------------ 此处一定要分配内存 kz.dwControlID := 0; s.left := 0; s.right := 0; try setvolume(kz,s); except end; freemem(kz); end; cnpack的控件里面有一个专门控制声音的,很详细,可以看他的代码,开源的。 delphi stringGrid更改单元格数据 谁能详细点给我解释下 下面的各个语句的意思!!!! 请问如何用sendmessage来选择带checkbox的Listbox前面的钩 请教,dephi中的string[250]应该对应c中的哪种类型 关于485通讯的数据接受和发送 谁知道如何截取网络封包?就像wpe一样的。 我的名字叫菜菜,因为我很菜。所以叫菜菜->窗体的老问题,怎么释放阿? 怎样编程实现指定文件名的程序打开 新手的问题,急 如何关闭windows? adoquery 的记录集问题? 高手请进,隐藏进程的线程如何扫描?
uses
MMSystem; function GetMasterMute(
Mixer: hMixerObj;
var Control: TMixerControl): MMResult;
// Returns True on success
var
Line: TMixerLine;
Controls: TMixerLineControls;
begin
ZeroMemory(@Line, SizeOf(Line));
Line.cbStruct := SizeOf(Line);
Line.dwComponentType := MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
Result := mixerGetLineInfo(Mixer, @Line,
MIXER_GETLINEINFOF_COMPONENTTYPE);
if Result = MMSYSERR_NOERROR then
begin
ZeroMemory(@Controls, SizeOf(Controls));
Controls.cbStruct := SizeOf(Controls);
Controls.dwLineID := Line.dwLineID;
Controls.cControls := 1;
Controls.dwControlType := MIXERCONTROL_CONTROLTYPE_MUTE;
Controls.cbmxctrl := SizeOf(Control);
Controls.pamxctrl := @Control;
Result := mixerGetLineControls(Mixer, @Controls,
MIXER_GETLINECONTROLSF_ONEBYTYPE);
end;
end; procedure SetMasterMuteValue(
Mixer: hMixerObj;
Value: Boolean);
var
MasterMute: TMixerControl;
Details: TMixerControlDetails;
BoolDetails: TMixerControlDetailsBoolean;
Code: MMResult;
begin
Code := GetMasterMute(0, MasterMute);
if Code = MMSYSERR_NOERROR then
begin
with Details do
begin
cbStruct := SizeOf(Details);
dwControlID := MasterMute.dwControlID;
cChannels := 1;
cMultipleItems := 0;
cbDetails := SizeOf(BoolDetails);
paDetails := @BoolDetails;
end;
LongBool(BoolDetails.fValue) := Value;
Code := mixerSetControlDetails(0, @Details,
MIXER_SETCONTROLDETAILSF_VALUE);
end;
if Code <> MMSYSERR_NOERROR then
raise Exception.CreateFmt('SetMasterMuteValue failure, '+
'multimedia system error #%d', [Code]);
end; // Example: procedure TForm1.Button1Click(Sender: TObject);
begin
SetMasterMuteValue(0, CheckBox1.Checked); // Mixer device #0 mute on/off
end; ---------------------------------------
mixerSetControlDetails
auxoutsetvolume 是控制CD音量的
waveOutSetVolume 是控制波形的
midiOutSetVolume 是控制FM或者是synthesizerunit Volume; interface uses windows,mmsystem; type
Tvolume=record
left,right:word; // 取值范围 0--65535
end; procedure fillstruct(control:PMixerControl;var Cdetails:tMIXERCONTROLDETAILS);
function getpeak(control:PMixerControl;var peak:integer):boolean;
function setvolume(control:Pmixercontrol; volume:Tvolume):boolean;
function getvolume(control:Pmixercontrol; volume:Tvolume):boolean; var
mcontrols:array of array of array of PMixerControl; //mixer的数组,单声卡可以不用
fmixerhandle:HMIXER; //mixer的句柄 implementation procedure fillstruct(control:PMixerControl;var Cdetails:tMIXERCONTROLDETAILS);
begin
Cdetails.cbStruct:=sizeof(cdetails);
cdetails.dwControlID:=Control.dwControlID;
cdetails.cbDetails:=sizeof(integer);
cdetails.hwndOwner:=0;
end; function getpeak(control:PMixerControl;var peak:integer):boolean;
var
details:TMixerControlDetailsSigned;
cdetails:tMIXERCONTROLDETAILS;
begin
Result:=false;
if control.dwControlType<> mixercontrol_controltype_peakmeter then exit;
cdetails.cChannels:=1;
cdetails.paDetails:=@details;
fillstruct(control,cdetails);
result:=mixerGetControlDetails(fmixerhandle,@cdetails,MIXER_GETCONTROLDETAILSF_VALUE)=0;
end; function setvolume(control:Pmixercontrol; volume:Tvolume):boolean;
var
details:array[0..30] of integer;
cdetails:tMIXERCONTROLDETAILS;
begin
fillstruct(control,cdetails);
cdetails.cChannels:=2;
cdetails.paDetails:=@details;
details[0]:=volume.left;
details[1]:=volume.right;
result:=mixerSetControlDetails(fmixerhandle,@cdetails,MIXER_GETCONTROLDETAILSF_VALUE)=0;
volume.left:=details[0];
volume.right:=details[1];
end; function getvolume(control:Pmixercontrol; volume:Tvolume):boolean;
var
details:array[0..30] of integer;
cdetails:tMIXERCONTROLDETAILS;
begin
fillstruct(control,cdetails);
cdetails.cChannels:=2;
cdetails.paDetails:=@details;
result:=mixerGetControlDetails(fmixerhandle,@cdetails,MIXER_GETCONTROLDETAILSF_VALUE)=0;
volume.left:=details[0];
volume.right:=details[1];
end; end. // 调用方法:
procedure TForm1.Button1Click(Sender: TObject);
var s : Tvolume;
kz : Pmixercontrol;
begin
new(kz); //<------------ 此处一定要分配内存
kz.dwControlID := 0;
s.left := 0;
s.right := 0;
try
setvolume(kz,s);
except
end;
freemem(kz);
end;