Subject: Re: [linux-audio-dev] Plugin APIs (again)
From: David Olofson (david_AT_olofson.net)
Date: Thu Dec 05 2002 - 17:10:16 EET
On Thursday 05 December 2002 11.15, Steve Harris wrote:
> On Wed, Dec 04, 2002 at 08:43:11 -0800, Tim Hockin wrote:
> > So how do VST effects do it? I can increase the delay feedback
> > all I like and it doesn't hiccup, stutter, or misbehave at all.
> > You're saying that this is a non-rt control because it might have
> > to realloc() buffers?
>
> Delay feedback is a RT control, delay time might not be (depending
> on how its implemented).
Right - I didn't even notice that he wrote "feedback" and not "delay
time"... *heh* That's what I was thinking about, to clarify things.
> I'm not sure how this can be handled easily, there are lots of
> things like loading samples that will be impossible to handle in an
> RT way, but I'm not sure that something like a sampler belongs in
> this kind of API. I know there are VSTi samplers, but windows
> people dont have jack.
Well, they have ReWire, but AFAIK, that supports only the "load as
DLL and run as callback" method...
> I could be that everything that can be usfully implemented in this
> kind of API doesnt need non RT controls.
I strongly doubt it's as simple as that. Maybe those controls will
really be more like "instantiation time parameters" - but they still
need to be *somewhere*. An extra bit in an existing API seems like
less complexity than a parallel API with essentially the same
functionality.
//David Olofson - Programmer, Composer, Open Source Advocate
.- Coming soon from VaporWare Inc...------------------------.
| The Return of Audiality! Real, working software. Really! |
| Real time and off-line synthesis, scripting, MIDI, LGPL...|
`-----------------------------------> (Public Release RSN) -'
.- M A I A -------------------------------------------------.
| The Multimedia Application Integration Architecture |
`----------------------------> http://www.linuxdj.com/maia -'
--- http://olofson.net --- http://www.reologica.se ---
This archive was generated by hypermail 2b28 : Thu Dec 05 2002 - 17:20:39 EET