real time sound

[S. Gongola]

Your Mail service provider seems to of blacklisted my domain???
On Sun March 21 2004 10:29 am, thedogfarted wrote:
> S. Gongola wrote:
> > I mostly pipe everything through SDL. mplayer works through SDL, and most
> > games use SDL. Like when I'm playing a shooting game when I press fire, I
> > hear the shooting sound about a second later. Can I do anything to SDL to
> > give it realtime priority?
>
> I had similar issue when i switched from oss to alsa (via mobo with
> onboard sound, 2.4.22-1.2174.nptl kernel). Look at the logs, there sould
> be a few lines at the sound card initialization that asks you to set an
> option for the driver. I tried one and now there are no more delays.
> (I'm not at my box now so i can't tell you exact name and value of the
> option)
What logs?
When you get to your box please tell me.
Thank you
> > And what about artsd. When I click the run with realtime priority
> > check-box it doesn't do much?
> >
> > On Sun March 21 2004 05:59 am, Tom 'Needs A Hat' Mitchell wrote:
> >>On Sat, Mar 20, 2004 at 09:04:10PM -0500, S. Gongola wrote:
> >>>It seems like I can only get real time sound without a delay when I'm
> >>>logged in only as root. How can I get real time sound when I'm logged in
> >>>as a user. What device permissions do I need to change, or adding the
> >>>user to a certain group can solve the problem.
> >>
> >>If the delays are not an issue for 'root' and they are for you when
> >>you are a normal 'user' then the issue is real time scheduling (or are
> >>you doing more stuff).
> >>
> >>You did not indicate which player you are working with.
> >>
> >>For xmms there is a config option "Use realtime priority when
> >>available".  But "realtime priority" is restricted to root.  N.B. with
> >>real time scheduling it is possible to apparently lock up a system.
> >>
> >>Anyhow RTS it is not available to mortals.  So....
> >>
> >>First increase the buffer size.
> >>
> >>Next perhaps open a window for a "su/su -" shell and run it there.
> >>
> >>If 'root' is not an option the next trick is a bit more complicated.
> >>Since xmms can browse, read and write files there are risks!
> >>
> >>If you know, understand and trust xmms AND it's plugins build a
> >>helper...  If you try marking xmms SUID=root and run it from a shell
> >>prompt you will see this helpful hint that might apply to any player
> >>that has RTS system calls coded in it:
> >>
> >>    Gtk-WARNING **: This process is currently running setuid or setgid.
> >>    This is not a supported use of GTK+. You must create a helper
> >>    program instead. For further details, see:
> >>
> >>	http://www.gtk.org/setuid.html
> >>
> >>    Refusing to initialize GTK+.
> >>
> >>Good luck.
> >>mitch
> >>
> >>--
> >>	T o m  M i t c h e l l
> >>	/dev/null the ultimate in secure storage.
>
> --
> thedogfarted *
>
> PS.:* - sk. Kurts Vonneguuts "Lopkautuve Nr. 5"