程式師世界 >> 編程語言 >> C語言 >> C++ >> C++入門知識 >> XP下，麥克風加強

XP下，麥克風加強

編輯：C++入門知識

[cpp]
bool CMicrophoneEnhance::SetEnhance(bool enhance, DWORD type)
{
 MIXERLINE line, sub_line;
 ZeroMemory(&line, sizeof(MIXERLINE));
 ZeroMemory(&sub_line, sizeof(MIXERLINE));

 HMIXER hMixer = NULL;
 bool result = false;
 int devs = ::mixerGetNumDevs();
 for(int i=0; i<devs; ++i)
 { //
 if (::mixerOpen(&hMixer, i, (DWORD)0, 0, CALLBACK_WINDOW) != MMSYSERR_NOERROR)
 {
 hMixer = NULL;
 continue;
 }
 line.cbStruct = sizeof(MIXERLINE);
 line.dwComponentType = type;
 if(::mixerGetLineInfo((HMIXEROBJ)hMixer,&line, MIXER_GETLINEINFOF_COMPONENTTYPE)!= MMSYSERR_NOERROR)
 {
 ::mixerClose(hMixer);
 hMixer = NULL;
 continue;
 }

 if(line.cConnections == 0)
 {
 ::mixerClose(hMixer);
 hMixer = NULL;
 continue;
 }
 int connections = line.cConnections;
 for(int j=0; j<connections; ++j)
 {
 sub_line = line;
 sub_line.dwSource = j;
 mixerGetLineInfo((HMIXEROBJ)hMixer, &sub_line, MIXER_GETLINEINFOF_SOURCE);

 MIXERCONTROL mxc;
 MIXERLINECONTROLS mxlc;
 mxlc.cbStruct = sizeof(mxlc);
 mxlc.dwLineID = sub_line.dwLineID;
 mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_ONOFF;
 mxlc.cControls = sub_line.cControls;
 mxlc.cbmxctrl = sizeof(MIXERCONTROL);
 mxlc.pamxctrl = &mxc;
 if (MMSYSERR_NOERROR != ::mixerGetLineControls((HMIXEROBJ)hMixer, &mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE))
 {
 continue;
 }
 
 CString strName = mxc.szName;
 strName.MakeUpper();
 if(-1 != strName.Find(_T("BOOST")) ||
 -1 != strName.Find(_T("麥克風加強")) ||
 -1 != strName.Find(_T("20DB")))
 {
 MIXERCONTROLDETAILS_BOOLEAN enh[2];
 MIXERCONTROLDETAILS mxcd;
 mxcd.cMultipleItems = 0;
 mxcd.dwControlID = mxc.dwControlID;
 mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
 mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
 mxcd.paDetails = enh;
 mxcd.cChannels = sub_line.cChannels;

 if(MMSYSERR_NOERROR != mixerGetControlDetails((HMIXEROBJ)hMixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE))
 {
 ASSERT(false);
 break;
 }
 enh[0].fValue = enhance?1:0;
 enh[1].fValue = enhance?1:0;
 if(MMSYSERR_NOERROR != mixerSetControlDetails((HMIXEROBJ)hMixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE))
 {
 ASSERT(false);
 break;
 }
 result = true;
 }
 }
 ::mixerClose(hMixer);
 hMixer = NULL;
 }

 return result;
}
[cpp]
CMicrophoneEnhance microphoneEnhance;
[cpp] view plaincopy
microphoneEnhance.SetEnhance(true, MIXERLINE_COMPONENTTYPE_DST_SPEAKERS);
[cpp]
microphoneEnhance.SetEnhance(true, MIXERLINE_COMPONENTTYPE_DST_WAVEIN)
[cpp]

暫時只能通過枚舉方法，把所有"麥克風加強"的MIXLINE打開來實現，如果有更好的方法，歡迎指出！