At 11:26 AM 4/01/02 +0100, Ewald Snel wrote:
(sorry for the duplicate message, it was delayed for one week (see date))
[...]
It would be interesting to see if the same could be achieved with 3DNow!
instructions, as this would provide a welcome boost for anyone with an AMD
K6-2 or K6-3
[...]
BTW - does anyone know why the mga driver internally converts to 422
format ? It seems to me that mga 400 and 450 chips do support 420
planar format... (I saw some sample code using it, I can probably find
it back if needed). I think XFree would benefit from using this
feature instead
Hi,
Could I use MMX assembly for improving the mga video driver? I wrote a
vertical chrominance filter (*) for the XVideo module using inline MMX
assembly. This allows me to improve output quality without any speed penalty.
Of course, I'm using #ifdef USE_MMX_ASM and the original C code as an
Hi,
I wrote a vertical chrominance filter (*) for the XVideo module using
inline MMX assembly. This allows me to improve output quality without
any speed penalty.
Do you mean for upsampling to 4:2:2 ? How do you filter? Do you
average to create the new chroma line?
Something like
Hi,
[...]
Something like that, the filter uses 0.75x nearest chrominance sample
and 0.25x second nearest chrominance sample. This is more accurate as
it doesn't shift the chrominance signal by 1 pixel.
Please, please correct me if I'm wrong here. In MPEG sampling, the
chrominance
Hi,
For some reason, this hardware feature has been disabled in the previous
release of XFree86 (4.1.0). I don't know if there was a good reason for this
(don't think so), but videos look better with this bit on.
It will eliminate red blockiness in the horizontal direction. Vertical
Hi,
[...]
It's a little more than that because the driver is using 4:2:2
internally. Copying the way it is doing you can't get much more than
160 MB/sec and uses the CPU the whole time.
Hrm, I hope it doesn't just double each chroma scanline. I'm in fear
now. Wish that was
Hi.
Hi,
I'm using a Logitech MouseManPlus USB (also works when using a USB-PS/2
adapter).
Current setup: Linux kernel 2.4.15-pre5, XFree86 from CVS (Nov. 24th).
Bug: Mouse wheel does not work with xterm/mozilla/any X app when using
USB mouse and Input core driver whereas it works with
