Subject: [ecasound] Re: [Jackit-devel] writable port and client names
From: Jeremy Hall (jhall_AT_uu.net)
Date: Wed Dec 19 2001 - 02:03:09 EET
In the new year, Kai Vehmanen wrote:
> And neither is ecasound, so same reasoning applies.
>
> But Jeremy's right in questioning the need for multiple clients. The
> problem is that a one-client solution requires ecasound to have a 'jack
> manager', and as it is now, there's no place to put it. It can't be a
> chain, audio object, controller nor an audio object, so it's something
> that has to be added to the core engine. And if we do this, then we a)
> make ecasound 100% dependent on jack, or b) fill the core code with
> ifdefs. Both seem like bad solutions.
>
or, write a dummy driver that does nothing and when the user wants jack
support, it really calls upon jack.
This would potentially allow one to load a jack plugin if he/she wanted
jack support and would aid in binary distributions.
> Usually this kind of situation means that our design is too limited for
> what we want to do.
I have wondered this for years.
You could compare it to a GUI framework where
> implementing new widget type cannot be done as an extension of existing
> types, but requires changes to the top-level concept of a widget and how
> they work.
>
> One thing I've been thinking about is adding a generic driver type to
> ecasound. This would also solve the problem of how to use
> ALSA's hw-sync capabilities. And of course, the concept is not
> new, but has been proven to work in ardour and jackd.
>
hmm I think we may be saying the same thing?
> But this wouldn't be a small change. The basic design of ecasound's engine
> and types has not been changed since early 1.x versions, and that's a
> _long_ time as pretty much everything else has changed during that time.
>
but over the years things have gotten slower and that delay is quite hard
to swallow. Maybe it is time to relook at the engine design.
> I'm sure other apps will face same kind of problems.
>
yes
_J
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