Subject: Re: [linux-audio-dev] LADSPA Specs ?
From: Richard Guenther (rguenth_AT_tat.physik.uni-tuebingen.de)
Date: Sun May 12 2002 - 20:02:06 EEST
On Sun, 12 May 2002, Paul Davis wrote:
> >>I'm afraid it would. You need to think about this some more. In any
> >>given unit of time, a certain number of samples are transformed into a
> >>varying air pressure wave. What matters is the relation between those
> >>samples and the original source material. The number of them remains
> >>the same per unit of time whether the signal is altered or not.
> >>
> >It is simple: I have m number of samples, and I want n number of samples
> >back.
>
> Then you're not talking about real-time ("streaming")
> processing. You're talking about processing, say, a static file to
> pitch shift it. LADSPA can support this, but as you note, there's no
> way for the host to ask the plugin "are you done yet?", so its hard
> (but not impossible) to do correctly.
Its certainly possible - but the problem with LADSPA is the host-centric
buffer management. Though you could add a callback asking for the output
buffer size.
Richard.
-- Richard Guenther <richard.guenther_AT_uni-tuebingen.de> WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/ The GLAME Project: http://www.glame.de/
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