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kAudioDevicePropertyDeviceIsAlive notification is never called?
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kAudioDevicePropertyDeviceIsAlive notification is never called?


  • Subject: kAudioDevicePropertyDeviceIsAlive notification is never called?
  • From: Rustam Muginov <email@hidden>
  • Date: Wed, 9 Nov 2005 15:46:39 +0300

Hello all.
I had installed the notification callback with the following way:


OSStatus PropertyListener( AudioHardwarePropertyID inPropertyID )
{
printf( "PropertyListener called, property %x \'%.4s\'\n", inPropertyID, &inPropertyID );
return kAudioHardwareNoError;
}


status = AudioHardwareAddPropertyListener( kAudioPropertyWildcardPropertyID, PropertyListener, NULL );

The return value is 0, and on plugging/unpluggin USB microphone i am gettin notifications like:


PropertyListener called, property 64657623 'dev#'
PropertyListener called, property 64496e20 'dIn '
PropertyListener called, property 64657623 'dev#'
PropertyListener called, property 64496e20 'dIn '

But i never get kAudioDevicePropertyDeviceIsAlive ('livn') value. HALLab application also does not show this notification. I am using OS X 10.3.9 and XCode 1.5 with CoreAudio SDK 1.3.6

Does this mean that kAudioDevicePropertyDeviceIsAlive notification is never sent?
Thank you.


--
Sincerely,
	Rustam Muginov

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