What corresponds to kAudioDevicePropertyDeviceIsRunningSomewhere in an audio driver?
What corresponds to kAudioDevicePropertyDeviceIsRunningSomewhere in an audio driver?
- Subject: What corresponds to kAudioDevicePropertyDeviceIsRunningSomewhere in an audio driver?
- From: "Sean McBride" <email@hidden>
- Date: Tue, 20 May 2003 09:51:04 -0400
- Organization: Matrox Electronic Systems Ltd.
Hi all,
I'm trying to make my preference pane able to detect if my core audio
driver is in use. I'm using AudioDeviceGetProperty() and
kAudioDevicePropertyDeviceIsRunningSomewhere.
As expected it reports 'not busy' at boot, and 'busy' after an app starts
to use it. But once it reports 'busy' it never becomes 'not busy' even
if I quit all apps and log out and in again.
I suspect a bug in our audio driver because I do not see the same thing
when querying AppleDBDMAAudioDMAEngine instead.
What corresponds to kAudioDevicePropertyDeviceIsRunningSomewhere in an
audio driver? Is it performAudioEngineStart and performAudioEngineStop,
or something else? Knowing this would help me look for a problem in my
drivers.
Thanks!
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Mac Software Designer +1-514-822-6000
Matrox Electronic Systems Ltd. Montrial, Quibec, Canada
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