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List:       kde-multimedia
Subject:    Re: mp3 decoder clicks?
From:       Charles Samuels <charles () kde ! org>
Date:       2001-07-20 11:55:21
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On Friday 20 July 2001 04:31 am, Martin Vogt wrote:

> On Fri, Jul 20, 2001 at 04:16:08AM -0700, Neil Stevens wrote:
> > On Friday July 20, 2001 04:00, degs wrote:
> > > SBLive has PCI concurrency problems with heavy IDE disk access on some
> > > systems doesn't it? It always used to cause me problems hard disk
> > > recording under windows on VIA chipset.
> >
> > That would fit in with other reports we've had.
>
> I would not say that: "ls -la" is heavy disk access.
>
>
>
> remember: xmms works fine on this system. (and it is threaded)
> Only after adding threads to the splay decoder it produces
> clicks.
> Maybe that xmms access /dev/dsp differently?
> (select(...) versus write(...), etc...)
>
> Artsd uses the select approach, and the yaf-xxx player the
> (blocking) write.
> But I don't know how threads may have an effect on the
> way "how to access /dev/dsp".

I think the main difference comes with the fact xmms can buffer much more 
than a second or two, while artsd can't.  That means that mpeglib has to keep 
up with the "smaller but more frequent" requests for data, and IDE is more 
cpu consuming, and possibly higher-latency.

Then again, I have SCSI :)
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