[Mplayer-cvslog] CVS: main/libmpcodecs vf_tfields.c,1.2,1.3

[Michael Niedermayer]

Hi

On Wednesday 30 April 2003 19:55, D Richard Felker III wrote:
> On Tue, Apr 29, 2003 at 11:56:33AM +0200, Michael Niedermayer wrote:
> > Hi
> >
> > On Monday 28 April 2003 04:54, Richard Felker CVS wrote:
> > > Update of /cvsroot/mplayer/main/libmpcodecs
> > > In directory mail:/var/tmp.root/cvs-serv5280/libmpcodecs
> > >
> > > Modified Files:
> > > 	vf_tfields.c
> > > Log Message:
> > > new mode for tfields filter -- shifts fields by a quarter-pixel so the
> > > output picture doesn't bob up and down :)
> >
> > hmm linear interpolation sucks IMHO, why dont u use some filter like
> > (-9a + 111b + 29c -3d + 64)>>7 or (-a + 14b + 3c + 8)>>4
>
> Because I'm lazy and don't know how to make this perform decent in
> mmx...
i cant imagine any tricks beyond a simple unpack, multiply, add, ..., shift, 
pack mmx implementation either ATM, but i guess its still more then fast 
enough 

>
> Also, I'm a bit skeptical of wider filters with with sharp edges
> (common in anime)... What do you think about this?
yes, wide filters will create ugly wave effects around edges (just try -sws 8)
but 3tap/4tap isnt wide, and short filters suck too for edges as they blur 
them

[...]

-- 
Michael
screen[y][x] ^= cursor[cy][cx];			(violates patent #4,197,590)
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buf[i]= qp - buf[i-1];				(violates patent #?)
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