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Re: Driver seems a little dizzy while running more than on media player
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Re: Driver seems a little dizzy while running more than on media player


  • Subject: Re: Driver seems a little dizzy while running more than on media player
  • From: Jeff Moore <email@hidden>
  • Date: Mon, 23 Feb 2009 09:39:11 -0800

If your driver is only making noise when there are multiple clients, it probably means that your driver has a problem with threading. It sounds like the multiple real time threads in the client processes is perturbing your driver timing enough to cause it to drop bad time stamps.

On Feb 23, 2009, at 3:57 AM, David Tan wrote:

I'm working on an kernel Firewire audio driver and found a troublesome issue.
While I’m using more than one player (e.g. iTunes and HALLab) to play music, sometime there’ll be noise. And then I have to stop both of them and start playing again, the noise will disappear.
My question is: what’s CoreAudio do in this case? Anything I should pay special attention to in my driver to eliminate the noise?



--

Jeff Moore
Core Audio
Apple


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