[Mplayer-users] I420 & YV12 support in XFree86-4.1.0

[Felix Buenemann]

On Wednesday, 15. August 2001 17:37, Ivan Kalvatchev wrote:
> Maybe i was not clear enough. That what i want to say
> is that most original XFree86 4.1.0 drivers instead of
> using I420 and YV12 planar format that IS supported by
> hardware, they do pack it in YUYV by software, and
> then puting it in overlay. So in this situation if
> YUYV is used it will be faster that YV12 becouse
> packing is done with MMX.
Btw. savage driver also convert to packed yuv in software when playing back 
planar YUV. Maybe savage chips only support packed yuv or just driver doesn't 
use hw capabilities.
>
> >Voodoo3 is really tricky, it has no direct yuv
> >overlay,
> >but its texture engine can do some hacks.
> >
> >Afaik, nvidia geforce (2) can do YV12.
> >
> >Yes, matrox g200 is a bit tricky, it supports only 2
> >planes, Y and interleaved UV. But G4x0 series has
> >direct
> >hardware 2x2 buffered (hardware vsync swap) planar
>
> YUV
>
> >support.
> >At least the card has it, and mga_vid can use it.
> >
> >
> >A'rpi / Astral & ESP-team
> >
> >--
> >mailto:arpi at thot.banki.hu
> >http://esp-team.scene.hu
>

-- 
Best Regards,
   Felix

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