Re: virtual OSS devices [for making selfish apps happy]

From: Alistair John Strachan
Date: Mon Nov 21 2005 - 21:27:45 EST

On Monday 21 November 2005 21:40, Lee Revell wrote:
> On Mon, 2005-11-21 at 22:16 +0100, Christian Parpart wrote:
> > Hi all,
> >
> > I'm having some apps running on my desktop that all want
> > exclusive access to my sound device just for playing audio
> > (and a single app for capturing), namely:
> >
> > * TeamSpeak (VoIP team voice chat)
> > * Cedega (for playing some win32 games on my beloved box)
> > * KDE/arts (my desktop wants to play some sounds as well wtf)
> >
> > While I could easily disable my desktop sounds, and yeah, forget about
> > the music, but I'd still like to be in TeamSpeak (talking to friends and
> > alike) while playing a game using cedega.
> >
> > Unfortunately, *all* those stupid (2) apps want exclusive access to the
> > OSS layout of my ALSA drivers, though, there just came into my mind to
> > buy a second audio device and wear a second headset (a little one
> > below/under my big one). But I couldn't find it handy anyway :(
> This problem is (mostly) solved already. You have to use aoss (alsa-lib
> based OSS emulation) on top of dmix (software mixing for soundcards too
> lame to do it in hardware). With a recent ALSA dmix is already used by
> default so the only change needed is to launch the OSS apps with the
> aoss wrapper e.g. aoss ./foo-oss-app. Since it's not completely
> transparent this problem will have to be solved at the distro level, by
> making sure all OSS apps are run with this wrapper.
> This method should only be needed for closed source apps, an open source
> app like artsd should be ported to use the ALSA API.

Which it already has been, for literally years.

[alistair] 02:26 [~] artsd -A
possible choices for the audio i/o method:

toss Threaded Open Sound System
null No Audio Input/Output
alsa Advanced Linux Sound Architecture
oss Open Sound System


'No sense being pessimistic, it probably wouldn't work anyway.'
Third year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.
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