On Thu, 18 Sep 2003, Paul Davis wrote:
> >The problem is that my application relies on a correct "delay" value, so
> >that it can use it to keep sound/video in sync.
>
> although i think that the dmix plugin should work correctly, i would
> be suprised, no, lets just say pleasantly suprised, if you could get
> perfect sound/video sync using it. otoh, i don't recall enough of
> jaroslav's description of how it worked at ZKM to really judge that.
>
> i suspect its a bit like trying to an audio interface with a "sloppy"
> hardware pointer. jaroslav will correct me, right jaroslav?
Actually the dmix plugin offers the stream position in "period-size"
steps, but it's no problem to call the standard ioctl() from the dmix
plugin to the real device to obtain the accurate stream position. I think
that it's the problem which James is noting.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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