Re: [Gwc-general] LADSPA plugin(s)

[Jeff W. <we...@ya...>]

Hi Nik,

I have been lax in keeping gwc-lib up to date, so it does not represent
the best technology that is found in gwc-0.21-05.  I had intended 
integrating
gwc and gwc-lib, but never got around to it.

Sadly, you can't turn either the denoising or the declicking algorithms into
LADSPA plugins, or I would have done that instead of gwc-lib.  It is because
the gwc algorithms are non-causal (if I remember the term correctly), 
i.e. it
is not 1 frame in and 1 frame out, the algorithms work on overlapping 
frames,
and declicking literally runs from the end to start instead of vice-versa.

If someone wanted to take gwc-0.21-05 and re-create the gwc-lib from it,
and then make gwc use gwc-lib, that would be a great step forward.  There
may be a small speed penalty but we can evaluate that.

Cheers,
Jeff

Nik wrote:

> Hi,
>
> My original concept was to write a LADSPA plugin to incorporate the 
> functionality of Gramofile into Audacity. When I posted about this on 
> the Audacity forums, the reply was that previous discussion had 
> decided to wait until GWC was separated into frontend and backend, and 
> then use the gwc-lib to create such a plugin.
>
> So, I'm putting my hand up to attempt this work. My questions are:
>
> 1. Is the gwc-lib-0.05 that I downloaded from SourceForge recent 
> enough to perform this work? It seems to be a little light - and 
> possibly a little out of date?
>
> 2. Is the code in the more recent GWC gwc-0.21-05 easily separated 
> into frontend and backend? I've built gwc from it, and it seems to 
> have no obvious library.
>
> 3. I notice in the TODO file a task to LADSPA-ise the filters. This is 
> certainly in the realm of what I'm looking at doing. Can anyone offer 
> any help in identifying the files needed by such a plugin?
>
> 4. Has anyone already started work on this, and if so, do they want 
> help, or are they hapily progressing in their own time?
>
>
> Any and all responses welcome.
>
>
> Cheers!
> Nik
>
>
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