[MPlayer-dev-eng] libvo driver for S3 Virge

[Mark Sanderson]

On Wednesday, 5 April 2006 8:34 a.m., Vladimir Mosgalin wrote:
>  On 2006.04.05 at 05:50:17 +1200, Mark Sanderson wrote next:
> 
> > Wow! Does it work with s3 virge/dx? It's too slow for using software

> > scaling (it can't throughput hi-res rgb image @30 fps), and can do 
> > some kind of scaling in hardware (quickview pro for DOS can make a
use 
> > of it), not sure about yuv conversion. I think DX/GX are similar 
> > (can't really remember) so you should try it out. My card (GX2)
seems 
> > quite capable, although I put this together largely because my CPU
is 
> > too slow for software scaling...
> 
> Your quoting is very strange...
Yep

> 
> Anyway, DX and GX should be very similar, but IMHO GX/2 differs from
GX and DX. 
> Well, at least according to S3.
> 
> I thought that slow CPU makes software scaling impossible, however it
turns out 
> that 1) yuv->rgb conversion can be very fast even on low-end cpus and
2) I couldn't 
> use software scaling with Virge DX on Athlon XP
> 2500+, which was fast enough with to do this with different card.
> Displaying 800x600x32 (or was it 24?) 24-30 fps was impossible.
> 
> So sw scaling is also needs faster videocard.
Well, I benchmarked my card at 166mb/s, about one third the AGP speed.
Maybe there 
is a large speed variation between the card designs?  I have seen
several memory chip 
types on the various cards I have come across.

Mark.