Re: [AD] Allegro fails to initialize sound under Pulseaudio

[Thomas Fjellstrom <tfjellstrom@xxxxxxxxxx>]

On Tue October 9 2007, Elias Pschernig wrote:
> On 10/6/07, Steven Brown <steven.w.j.brown@xxxxxxxxxx> wrote:
> > I think I found the problem and I've updated the ticket:
> > http://www.pulseaudio.org/ticket/133
> >
> > It seems that Allegro requests unsigned formats, which are not supported
> > by PulseAudio.  (See the ticket for more details.)  Adding support to
> > PulseAudio has been discussed briefly, but I'm not sure when (or if) it
> > will happen.
>
> It would be easy to add a sign conversion pass to Allegro's mixer as
> well of course. Basically, in
> https://alleg.svn.sourceforge.net/svnroot/alleg/allegro/branches/4.3.10plus
>/src/unix/alsa9.c provide another copy of alsa_mix which has an extra loop
> over the
> sample buffer and converts to unsigned. On driver initialization, it
> could be decided if the normal function or the one with conversion
> (slightly slower) should be used. E.g. the jack driver always does a
> conversion like that since it only understands signed data.
>

Really? I find it really odd that a sound server, thats meant to pipe and mix 
many sound streams and formats can only handle signed data.. Just seems wrong 
to me. :o

-- 
Thomas Fjellstrom
tfjellstrom@xxxxxxxxxx