如何获得系统当前的音频设备名称？

[sunmono]

请问：
如何获得系统当前使用的音频设备的名称？
谢谢！！！！！

[sunmono]

up help

[DentistryDoctor]

// method to get the list of mixer information from VFW
void MixerList::getMixerInfo(){

MIXERCAPS mixcaps;
MMRESULT err;
unsigned long iNumDevs, i, j, k, l, xpos, ypos;
MixerInfo * mInfo;
DestInfo * dInfo;
SourceInfo * sInfo;
ControlInfo * cInfo;

/* Get the number of Mixer devices in this computer */
iNumDevs = mixerGetNumDevs();

/* Go through all of those mixer devices, getting info for each one */
for (i = 0; i < iNumDevs; i++)
{
/* Get info about the next device */
if (!mixerGetDevCaps(i, &mixcaps, sizeof(MIXERCAPS)))
{
/* create a mixerInfo for the mixer */
mInfo = new MixerInfo();
mInfo->setName(mixcaps.szPname);

/* Get info about all the destination lines for this mixer */
for(j=0;j<mixcaps.cDestinations;j++){
dInfo = new DestInfo();
MIXERLINE dmixerline;
dmixerline.cbStruct = sizeof(MIXERLINE);
dmixerline.dwDestination = j;
if ((err = mixerGetLineInfo((HMIXEROBJ)i,&dmixerline, MIXER_GETLINEINFOF_DESTINATION))) {
TRACE0("Error getting destination lines\n");
}
else{
dInfo->setName(dmixerline.szName);
dInfo->setFlags(dmixerline.fdwLine);
dInfo->setLineID(dmixerline.dwLineID);

/* Get info about all the controls for this dest line */
MIXERLINECONTROLS destLineControls;
MIXERCONTROL * destControlArray = (MIXERCONTROL*)malloc(dmixerline.cControls * sizeof(MIXERCONTROL));
destLineControls.cbStruct = sizeof(MIXERLINECONTROLS);
destLineControls.cControls = dmixerline.cControls;
destLineControls.dwLineID = dmixerline.dwLineID;
destLineControls.pamxctrl = destControlArray;
destLineControls.cbmxctrl = sizeof(MIXERCONTROL);
if ((err = mixerGetLineControls((HMIXEROBJ)i, &destLineControls, MIXER_GETLINECONTROLSF_ALL))){
TRACE0("Error getting destination line controls");
}
else{
ypos = STD_CONTROL_START + STD_BORDER * 2;
for(l=0;l<dmixerline.cControls;l++){
ypos = ypos + STD_BORDER;
cInfo = new ControlInfo();
cInfo->setName(destControlArray[l].szName);
cInfo->setId(destControlArray[l].dwControlID);
cInfo->setType(destControlArray[l].dwControlType);
cInfo->setFlags(destControlArray[l].fdwControl);
cInfo->setMulti(destControlArray[l].cMultipleItems);
cInfo->setMax(destControlArray[l].Bounds.dwMaximum);
cInfo->setMin(destControlArray[l].Bounds.dwMinimum);
cInfo->setStep(destControlArray[l].Metrics.cSteps);
cInfo->setGUIx(STD_BORDER * 2);
cInfo->setGUIy(ypos);
cInfo->setWide(STD_CONTROL_WIDE);
cInfo->setHigh(getControlHeight(cInfo->getType()));
ypos = ypos + cInfo->getHigh() + STD_BORDER ;
dInfo->addControl(cInfo);
}
}

/* Get info about all the source lines for this dest line */
xpos = STD_CONTROL_WIDE + STD_BORDER * 4;
for(k=0;k<dmixerline.cConnections;k++){
sInfo = new SourceInfo();
MIXERLINE smixerline;
smixerline.cbStruct = sizeof(MIXERLINE);
smixerline.dwDestination = j;
smixerline.dwSource = k;
if ((err = mixerGetLineInfo((HMIXEROBJ)i, &smixerline, MIXER_GETLINEINFOF_SOURCE))){
TRACE0("Error getting source lines\n");
}
else{
sInfo->setName(smixerline.szName);
sInfo->setFlags(smixerline.fdwLine);
sInfo->setLineID(smixerline.dwLineID);
sInfo->setGUIy(STD_CONTROL_START);
sInfo->setGUIx(xpos);
if (sInfo->isActive())
xpos = xpos + STD_CONTROL_WIDE + STD_BORDER * 3;

/* get info about all the controls for this source line */
MIXERLINECONTROLS sourceLineControls;
MIXERCONTROL * sourceControlArray = (MIXERCONTROL*)malloc(smixerline.cControls * sizeof(MIXERCONTROL));
sourceLineControls.cbStruct = sizeof(MIXERLINECONTROLS);
sourceLineControls.cControls = smixerline.cControls;
sourceLineControls.dwLineID = smixerline.dwLineID;
sourceLineControls.pamxctrl = sourceControlArray;
sourceLineControls.cbmxctrl = sizeof(MIXERCONTROL);
if ((err = mixerGetLineControls((HMIXEROBJ)i, &sourceLineControls, MIXER_GETLINECONTROLSF_ALL))){
TRACE0("Error getting source line controls");
}
else{
ypos = STD_CONTROL_START + STD_BORDER * 3;
for(l=0;l<smixerline.cControls;l++){
cInfo = new ControlInfo();
cInfo->setName(sourceControlArray[l].szName);
cInfo->setId(sourceControlArray[l].dwControlID);
cInfo->setType(sourceControlArray[l].dwControlType);
cInfo->setFlags(sourceControlArray[l].fdwControl);
cInfo->setMulti(sourceControlArray[l].cMultipleItems);
cInfo->setMax(sourceControlArray[l].Bounds.dwMaximum);
cInfo->setMin(sourceControlArray[l].Bounds.dwMinimum);
cInfo->setStep(sourceControlArray[l].Metrics.cSteps);
cInfo->setGUIx(sInfo->getGUIx() + STD_BORDER);
cInfo->setGUIy(ypos);
cInfo->setWide(STD_CONTROL_WIDE);
cInfo->setHigh(getControlHeight(cInfo->getType()));
ypos += cInfo->getHigh() + STD_BORDER;
sInfo->addControl(cInfo);
}
}

dInfo->addSource(sInfo);
}
}
}

mInfo->addDest(dInfo);
}

/* add the info for the mixer to the list of mixers */
addMixer(mInfo);
}
}

}

[sodangerous]

mixerGetDevCaps