Re: What corresponds to kAudioDevicePropertyDeviceIsRunningSomewhere in an audio driver?
Re: What corresponds to kAudioDevicePropertyDeviceIsRunningSomewhere in an audio driver?
- Subject: Re: What corresponds to kAudioDevicePropertyDeviceIsRunningSomewhere in an audio driver?
- From: "Sean McBride" <email@hidden>
- Date: Fri, 23 May 2003 18:26:22 -0400
- Organization: Matrox Electronic Systems Ltd.
Jeff Moore (email@hidden) wrote on Tue, 20 May 2003 12:11:13 -0700:
>
The value of kAudioDevicePropertyDeviceIsRunningSomewhere is determined
>
by the HAL receiving the start/stop/pause/resume notifications from the
>
driver.
Hi Jeff,
I've done a test with the PhantomAudioDriver playing an mp3 in QT Player.
As expected, starting the playback calls performAudioEngineStart, and
stopping the playback calls performAudioEngineStop. But with our driver,
we get a performAudioEngineStart but never get a performAudioEngineStop.
Any idea why this might be? (I believe this is why
kAudioDevicePropertyDeviceIsRunningSomewhere continues to report busy
after becoming busy once.)
>
There is a bug in the current HAL that prevents it from sending a
>
notification out when this value changes, but the value itself should
>
still be set appropriately.
That's a pity, but no big deal... I'll just have to poll for the info.
Thanks Jeff!
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Mac Software Designer +1-514-822-6000
Matrox Electronic Systems Ltd. Montrial, Quibec, Canada
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