On Fri, 26 Sep 2003, James Courtier-Dutton wrote:
> Paul Davis wrote:
> >>Hello
> >>I work at "hfkernel" by Tom Sailer, a program for pactor/rtty (soundcard =
> >>ham=20
> >>radio digimodes). It seems complicated, because it uses realtime scheduli=
> >>ng,=20
> >>select(), mmap(), and runs in 3 threads.=20
> >>It was made in 1996 for OSS; I am trying to get it running with ALSA.=20
> >
> >
> > JACK already does this kind of stuff. You'd save yourself major
> > headaches by starting off doing it as a JACK client. Alternatively,
> > use the JACK source as a guide, although its very complex because it
> > is intended to handle many channels in a very robust way, with
> > complete xrun detection.
> >
> > http://jackit.sf.net/
> >
> > another alternative source of ideas would be ecasound's own ALSA code.
> >
> > --p
> >
> I agree with Paul, that JACK would be a good place to work from, because
> it already deals with all the complicated realtime full duplex details,
> and leaves a relatively simple interface for the user application.
By the way, does JACK still rely on the float samples internally? Then it
is not a good solution for the soft-modem application (driver) where
everything should be highly optimized.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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