Displaying Current Audio Output Device (take 2)
Displaying Current Audio Output Device (take 2)
- Subject: Displaying Current Audio Output Device (take 2)
- From: Thorrin <email@hidden>
- Date: Wed, 11 Jul 2007 06:10:30 -0700 (PDT)
OK, I am at the point where I can get the default
output device and display the name to the screen, but
I don't get any updates as to when that device
changes. Whatever I have set at first keeps
displaying even though I change settings in the audio
prefs panel.
It seems that I keep getting the same deviceID and
thus the same name. I would assume that
kAudioOutputUnitProperty_CurrentDevice returned the
current device selected in the prefs window... Should
I be using something else?
I have tried releasing the output unit and grabbing it
again, but to no avail.
Code (very hackish due to a lot of trial and error
stuff):
int main (int argc, const char * argv[]) {
OSStatus err = noErr;
Handle a;
AUEventListenerRef c;
AudioUnitEvent d;
AudioUnitProperty e;
AudioUnit InputUnit;
AudioUnit OutputUnit;
// Open the default output unit
ComponentDescription desc, desc2;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType =
kAudioUnitSubType_DefaultOutput;
desc.componentManufacturer =
kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
Component comp = FindNextComponent(NULL, &desc);
a = NewHandle (0);
GetComponentInfo(comp, &desc2,a, NULL, NULL);
char *name;
int len;
len = *a;
printf("%s\n",(unsigned char*)((int)(len+1)));
err = noErr;
err = OpenAComponent(comp, &OutputUnit);
AudioDeviceID deviceID;
size = sizeof(AudioDeviceID);
name = malloc (255);
while (1) {
deviceID = 0;
size = sizeof(AudioDeviceID);
result = AudioUnitGetProperty(OutputUnit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global, 0, &deviceID, &size);
AudioDeviceGetPropertyInfo(deviceID, 0, 0,
kAudioDevicePropertyDeviceName, &size, NULL);
AudioDeviceGetProperty(deviceID, 0, 0,
kAudioDevicePropertyDeviceName, &size, name);
printf("%s\n",name);
sleep (1);
}
}
"Everyone is allergic to giant rocks hitting them in the head!"
-Thorrin's elf chick after casting a 'meteor swarm' spell ;)
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