Re: ham radio OSS duplex realtime mmap program.

[James Courtier-Dutton <James@superbug.demon.co.uk>]

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.

Cheers
James



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