[PD] Pd and gpgpu

[Roman Haefeli]

yo, ignore me, if i am saying something absolutely stupid and unrelated,
but isn't that exactly, what [pix_sig2pix~] and its counterpart
[pix_pix2sig~] do? of course you still would have to [pix_texture] first
in order to transfer the data to the gpu and then afterwards [pix_snap]
it to bring it back from gpu to a pix. 

audioIn~
|
[pix_sig2pix~]
|
[pix_texture]
|
[doSomeStuff]
|
[pix_snap]
|
[pix_pix2sig~]
|
audioOut~

from my experience, doing just all this transfers is pretty slow
(especially [pix_snap], as others already mentioned)

roman



On Sat, 2007-11-10 at 13:59 -0500, vade wrote:
> Max MSP/Jitter has bridge objects that convert from audio rate to  
> matrices and back, which would be needed in PD land to readback from  
> the GPU, and convert to an audio rate signal. Thats how this is done.  
> Otherwise i have no idea how you would implement souch a patch.
> 
> 
> On Nov 10, 2007, at 8:55 AM, Georg Holzmann wrote:
> 
> > Hallo!
> >
> >> it is true that the gpu is unused most of the time and could be  
> >> used to
> >> do fast calculations, but the main output for graphicscards is the
> >> screen and reading back into ram can be slow. (of course "slow" is a
> >> relative term). I also see a problem in the different formats for  
> >> audio
> >> and images. most graphics cards are optimized for vec4 processings (4
> >> parallel color channels). and audio...
> >
> > Well, there are already quite some papers/software for audio  
> > processing
> > on the gpu (see e.g.
> > http://www.gpgpu.org/cgi-bin/blosxom.cgi/Audio%20and%20Signal%20Processing/index.html) 
> > .
> >
> > But AFAIK nobody did this with pd up to now ...
> >
> > LG
> > Georg
> >
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> 
> 
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