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[原创]查询系统是否静音和设置静音
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发表于:
2010-1-20 17:31
6100
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有时忘记将系统静音,关机时声音很大,想办法咯!结果,网上找了半天也没找到一个怎么查询和设置系统静音的函数!
都是你抄我的我抄你的,没有几个解决实际问题的,只是想查询一下系统是否静音和设置设置与否,结果都是讲一大通废话,哈哈,好在自己能去其糟粕取其精华,去除一大段废话与无用的代码加上自己理解得到两精简版函数,在看雪上存盘了:
#include <mmsystem.h> //我一直记成是妹妹系统,哈哈,妹妹的系统都是与多媒体有关的
#pragma comment(lib, "winmm.lib") //windows里有妹妹哦!
BOOL IsSystemMute(LONG &lvalue){ //lvalue为0时系统非静音,否则是静音,函数返回成功与否
HMIXER hMixer;
MIXERLINE mixerline;
MIXERLINECONTROLS mlcs;
MIXERCONTROL mc;
MIXERCONTROLDETAILS_BOOLEAN mcdMute;
MIXERCONTROLDETAILS mcd;
try{
if (MMSYSERR_NOERROR == mixerOpen(&hMixer, 0, 0, 0, 0)){
RtlZeroMemory(&mixerline, sizeof(MIXERLINE));
mixerline.cbStruct = sizeof(MIXERLINE);
mixerline.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
if (MMSYSERR_NOERROR == mixerGetLineInfo((HMIXEROBJ)hMixer, &mixerline, MIXER_GETLINEINFOF_COMPONENTTYPE)){
RtlZeroMemory(&mlcs, sizeof(MIXERLINECONTROLS));
mlcs.cbStruct = sizeof(MIXERLINECONTROLS);
mlcs.dwLineID = mixerline.dwLineID;
mlcs.dwControlType = MIXERCONTROL_CONTROLTYPE_MUTE;
mlcs.cControls = 1;
mlcs.cbmxctrl = sizeof(MIXERCONTROL);
mlcs.pamxctrl = & mc;
if (MMSYSERR_NOERROR == mixerGetLineControls((HMIXEROBJ)hMixer, &mlcs, MIXER_GETLINECONTROLSF_ONEBYTYPE)){
RtlZeroMemory(&mcd, sizeof(MIXERCONTROLDETAILS));
mcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mcd.dwControlID = mc.dwControlID;
mcd.cChannels = 1;
mcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
mcd.paDetails = &mcdMute;
if (MMSYSERR_NOERROR == mixerGetControlDetails((HMIXEROBJ)hMixer, &mcd, MIXER_GETCONTROLDETAILSF_VALUE)){
lvalue = mcdMute.fValue;
return TRUE;
}
}
}
}
mixerClose(hMixer);
return FALSE;
}catch(...){
mixerClose(hMixer);
return FALSE;
}
}
BOOL SetSystemMute(LONG lMute){ //0为非静音,1为静音
HMIXER hMixer;
MIXERLINE mixerline;
MIXERLINECONTROLS mlcs;
MIXERCONTROL mc;
MIXERCONTROLDETAILS_BOOLEAN mcdMute;
MIXERCONTROLDETAILS mcd;
try{
if (MMSYSERR_NOERROR == mixerOpen(&hMixer, 0, 0, 0, 0)){
RtlZeroMemory(&mixerline, sizeof(MIXERLINE));
mixerline.cbStruct = sizeof(MIXERLINE);
mixerline.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
if (MMSYSERR_NOERROR == mixerGetLineInfo((HMIXEROBJ)hMixer, &mixerline, MIXER_GETLINEINFOF_COMPONENTTYPE)){
RtlZeroMemory(&mlcs, sizeof(MIXERLINECONTROLS));
mlcs.cbStruct = sizeof(MIXERLINECONTROLS);
mlcs.dwLineID = mixerline.dwLineID;
mlcs.dwControlType = MIXERCONTROL_CONTROLTYPE_MUTE;
mlcs.cControls = 1;
mlcs.cbmxctrl = sizeof(MIXERCONTROL);
mlcs.pamxctrl = & mc;
if (MMSYSERR_NOERROR == mixerGetLineControls((HMIXEROBJ)hMixer, &mlcs, MIXER_GETLINECONTROLSF_ONEBYTYPE)){
RtlZeroMemory(&mcd, sizeof(MIXERCONTROLDETAILS));
mcdMute.fValue = lMute; //静音
mcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mcd.dwControlID = mc.dwControlID;
mcd.cChannels = 1;
mcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
mcd.paDetails = &mcdMute;
if (MMSYSERR_NOERROR == mixerSetControlDetails((HMIXEROBJ)hMixer, &mcd, MIXER_SETCONTROLDETAILSF_VALUE)){
return TRUE;
}
}
}
}
mixerClose(hMixer);
return FALSE;
}catch(...){
mixerClose(hMixer);
return FALSE;
}
}
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