Fix coreaudio module not detecting changes of the default audio device.

Author: alex-the-man

src/coreaudio.c

@@ -139,12 +139,15 @@ static void destroy_ca(struct SoundIoPrivate *si) {
     struct SoundIoCoreAudio *sica = &si->backend_data.coreaudio;
 
     AudioObjectPropertyAddress prop_address = {
-        kAudioHardwarePropertyDevices,
+        kAudioHardwarePropertyDefaultOutputDevice,
         kAudioObjectPropertyScopeGlobal,
         kAudioObjectPropertyElementMaster
     };
     AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &prop_address, on_devices_changed, si);
 
+    prop_address.mSelector = kAudioHardwarePropertyDefaultInputDevice;
+    AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &prop_address, on_devices_changed, si);
+
     prop_address.mSelector = kAudioHardwarePropertyServiceRestarted;
     AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &prop_address, on_service_restarted, si);
 
@@ -1435,7 +1438,7 @@ int soundio_coreaudio_init(struct SoundIoPrivate *si) {
     }
 
     AudioObjectPropertyAddress prop_address = {
-        kAudioHardwarePropertyDevices,
+        kAudioHardwarePropertyDefaultOutputDevice,
         kAudioObjectPropertyScopeGlobal,
         kAudioObjectPropertyElementMaster
     };
@@ -1446,6 +1449,14 @@ int soundio_coreaudio_init(struct SoundIoPrivate *si) {
         return SoundIoErrorSystemResources;
     }
 
+    prop_address.mSelector = kAudioHardwarePropertyDefaultInputDevice;
+    if ((err = AudioObjectAddPropertyListener(kAudioObjectSystemObject, &prop_address,
+        on_devices_changed, si)))
+    {
+        destroy_ca(si);
+        return SoundIoErrorSystemResources;
+    }
+
     prop_address.mSelector = kAudioHardwarePropertyServiceRestarted;
     if ((err = AudioObjectAddPropertyListener(kAudioObjectSystemObject, &prop_address,
         on_service_restarted, si)))