Re: [LAD] handling data streams: file vs callback

Dirk Jagdmann wrote:
> Hello Patrick,
>
>> I'm trying to jackify xwax. Xwax is a linux based emulator for Rane
>> serato and Final scratch.
>> I have successfully adapted the code from jackEQ to allow xwax to
>> register and connect several JACK i/o's.
>> However the original system uses file descriptors for handling the
>> data (oss/alsa) internally and this is not instantly compatible with
>> the JACK callback system. At least it's not obvious to me how to link the
>
> I don't know xwax, but since it currently has oss and alsa output I
> guess it is using a "blocking IO" model instead of the "callback" model
> of jack. Restructuring the logic from blocking to callbacks can be
> complicated. I you want to have a first result have a look at
> http://bio2jack.sourceforge.net/ which should fill your gap.
>

Hi,

Thanks for your suggestion. However I want to get multiple i/o's working
natively.

I'm fairly certain the code doesn't need restructuring. It's more a case
of how to connect the internal data stream which is read from disk to
jack outputs or jack inputs to the internal stream.

I think it would take some of the more advanced programmers on this list
less than half an hour to fill in the gap. But it's gonna take me a
couple of weeks of research to get my head around the solution...

-- 
Patrick Shirkey - Boost Hardware Ltd.
http://www.boosthardware.com
http://lau.linuxaudio.org - The Linux Audio Users guide
========================================
"Anything your mind can see you can manifest physically, then it will 
become reality" - Macka B
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