[FFmpeg-devel] [PATCH] Port gradfun to libavfilter (GCI)

[Stefano Sabatini]

On date Wednesday 2010-12-08 22:23:42 +0200, Martin Storsj? encoded:
> On Tue, 7 Dec 2010, Stefano Sabatini wrote:
> 
> > On date Monday 2010-12-06 21:11:34 -0500, Nolan L encoded:
> > > +    
> > > +    gf->chroma_w = -((-inlink->w) >> hsub);
> > > +    gf->chroma_h = -((-inlink->h) >> vsub);
> > 
> > is this -((-foo)>>bar) required? (why not simply foo>>bar)?
> 
> This rounds up properly, for the cases where the luma width isn't evenly 
> divisible for chroma subsampling.

Yes but what's the point of the double negation?
-- 
FFmpeg = Furious Formidable Mythic Patchable Experimenting Game