[vlc-devel] 2.0.0 and resampling

Laurent Aimar fenrir at elivagar.org
Wed Feb 29 17:03:43 CET 2012

On Wed, Feb 29, 2012 at 04:51:56PM +0100, Jean-Baptiste Kempf wrote:
> On Wed, Feb 29, 2012 at 04:35:19PM +0100, Laurent Aimar wrote :
> >  For CPU with an FPU, I don't really see why that would be so slow. Resampling
> > is a FIR and you don't need that much taps to have a good enough quality. For
> > a 48kHz resamling, around 40 mul + 40 add (+ a one integer div + mod) per
> > output sample should be quite good, and it doesn't seem that much computation
> > (especially compared to a video decoder).
> Maybe, but people on Atom, G5, P4 cannot play video anymore with 2.0.0.
> And people with C2D had +100% increase of CPU to decode a normal SD
> Xvid/DviX with the current samplerate resampler.
 Maybe it's a bug in the library we use, or the way they are compiled, or the
option we gaves them, dunno. I am just a bit puzzled by the current issue.


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