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Subject: Re: [PATCH 3/4] new timeofday x86-64 arch specific changes (v. B1)
From: Lee Revell <rlrevell@joe-job.com>
To: Parag Warudkar <kernel-stuff@comcast.net>
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Date: Sun, 05 Jun 2005 18:13:47 -0400
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On Sun, 2005-06-05 at 17:41 -0400, Parag Warudkar wrote:
> On Sunday 05 June 2005 16:51, Lee Revell wrote:
> > Well, that would be a broken design anyway.  That's what the ALSA timer
> > API is for.  But XMMS has a long history of buggy ALSA support anyway.
> >
> 
> I am not sure they use gettimeofday(). Pardon my ignorance but why is it 
> broken for them to use gettimeofday()?

If they're trying to synchronize other things to the sound,
gettimeofday() is a poor choice because it's driven by a different
crystal than the soundcard.  The correct solution is to use a PCM slave
timer.  See alsa-lib/examples/timer.c.

Lee