yuv->rgb conversion faster with big lookup-table?

[hanfrunz]

hello,

i just had an idea:

wouldn't it increase speed if avisysth would use 3 lookuparrays, like:

r(y,u,v)
g(y,u,v)
b(y,u,v)

to convert yuv->rgb??

y range is 16 to 235 (0..218)
u and v range is 16 to 240 (0..223)

so we need
3x 218*233*233
= 11835002 byte
= 11,29 mb, should be possible on most systems :-)

can any of the developers test that? or did anybody test that before?
maybe a new command like convert2rgbwithlookuptable ?

hanfrunz

[Steady]

It would actually be much slower on a modern CPU. Access from uncached memory is much slower than a few multiply-adds.