[linux-audio-dev] Re: OSC-Question

Arnold Krille arnold at roederberg.dyndns.org
Tue Mar 29 20:07:54 UTC 2005

On Tuesday 29 March 2005 21:21, Robert Jonsson wrote:
> On Tuesday 29 Mar 2005 18:38, Juhana Sadeharju wrote:
> > AlsaModularSynth uses Qt's signals and slots in audio processing,
> It does? If memory serves me signals and slots are not realtime safe,
> moreover they are only allowed to be used from one thread. Hence, if you
> have a GUI only that thread can utilize these features.

Thats right, Qt`s signal/slot is inside-thread-only. But I think they have 
some wrappers for multithread apps since they also provide the mechanism for 
threads (->QThread)...

> > and thus requires the whole Qt and mixes GUI toolkit to audio side.
> > It could be wise to use sigc++ or minimal S/S code in audio processing
> > and Qt only in GUI.
> > But because Qt comes with every Linux distribution, maybe bad
> > dependencies can be allowed.
> I don't see why Qt is a bad dependency, on the contrary, having it all in
> one place seems like a very good way to cut down on dependencies.
> Since it's mostly used as a shared library the impact becomes much smaller
> as soon as you use more than one program linked to Qt.

And as it is mostly agreed that qjackctl is a cool way of controlling jack you 
already have qt installed and loaded...


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