[MPlayer-dev-eng] ATI + vidix scaler quality

[Alex Beregszaszi]

<20020707164011.B21307 at localhost.localdomain.hu>; from alex at naxine.org on Sun, Jul 07, 2002 at 04:40:11PM +0200
> <20020707162649.A21307 at localhost.localdomain.hu>; from alex at naxine.org on Sun, Jul 07, 2002 at 04:26:49PM +0200
> > Hi,
> > 
> > > Alex mentioned some time ago that vidix scaling on radeon looks ugly.
> > > Now i'v tested vidix on notebook with mach64, and the vidix scaling is
> > > simple nearest-neighbour type (YUY2) :(
> > > GATOS drivers (Xv) has nice scaling on the same machine, looks like
> > > bicubic or so.
> > hmm, i will look at the gatos source (as soon as i put my radeon back ;)
> gatos xv's default values are:
> OVERLAY_SCALE_CNTL	0x80000000
> OVERLAY_EXCLUSIVE_HORZ	0
> OVERLAY_EXCLUSIVE_VERT	0
> SCALER_H_COEFF0		0x00002000
> SCALER_H_COEFF1		0x0D06200D
> SCALER_H_COEFF2		0x0D0A1C0D
> SCALER_H_COEFF3		0x0C0E1A0C
> SCALER_H_COEFF4		0x0C14140C
> 
> and for scaling:
> OVERLAY_SCALE_CNTL	0x4000001 | (3 << 30)
> 
> hm, i will immediately swap my cards, the gatos driver seems to be very perfect
ok this was for mach64, the radeon is a bit other, but note:
it handles yuy2 and yv12 as the same in the scaler, just have a look at
gatos/radeon_vid.c:2503

-
alex