kAudioDevicePropertyDeviceIsRunningSomewhere and 10.4
kAudioDevicePropertyDeviceIsRunningSomewhere and 10.4
- Subject: kAudioDevicePropertyDeviceIsRunningSomewhere and 10.4
- From: David Lavo <email@hidden>
- Date: Wed, 3 Dec 2008 22:18:39 -0800
| Hello,
I'm writing a utility that examines audio devices on a system. To update the display, I call AudioDeviceAddPropertyListener() for every device, and then handle property change notifications.
One of the changes I'm interested in is kAudioDevicePropertyDeviceIsRunningSomewhere, to tell me which devices are currently in use. Under OS 10.5, I get the proper change notification and then I can poll the property state with AudioDeviceGetProperty(). All works as expected.
Under 10.4 I get the change notifications but when I check the property state with AudioDeviceGetProperty() it always returns 0 (with no error) for kAudioDevicePropertyDeviceIsRunningSomewhere. So the system (and my app) knows the property value has changed, but for whatever reason I'm unable to get the actual value.
Any help would be greatly appreciated,
David |
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