[MPlayer-dev-eng] Software scaler regression

[Michael Niedermayer]

Hi

On Sunday 02 November 2003 23:38, Matthias Wieser wrote:
> Hi,
>
> some time ago I did software scaler comparisons
> (http://home.knuut.de/MWieser_/index.html).
>
> Last time I rerun my script I created difference images between
> old and new ones.
>
> Between Oct. 12 and Oct. 26 changes went in that made
> - sws 1 produces errors when you scale to n*8+x  (1)
cant reproduce

> - all software scaler produce worse colors than before (2)
ur comparission is flawed, u cant compare the unscaled yuv->rgb converter 
against the scaled one and somehow assume that a difference is a bug in the 
later, i suggest that u run the scaler several times in a row to check if 
there is a worse color drift than before

[...]
-- 
Michael
level[i]= get_vlc(); i+=get_vlc();		(violates patent EP0266049)
median(mv[y-1][x], mv[y][x-1], mv[y+1][x+1]);	(violates patent #5,905,535)
buf[i]= qp - buf[i-1];				(violates patent #?)
for more examples, see http://mplayerhq.hu/~michael/patent.html
stop it, see http://petition.eurolinux.org & http://petition.ffii.org/eubsa/en