On Tue, 31 Jul 2001 around 09:47:40 +0000, Gerd Knorr wrote:
> > > With Xvideo (which xawtv uses by default if available) the X-Server
> > > calls SETFBUF. Without Xvideo v4l-conf (you can start that one from the
> > > command line too and see what it prints) does that job and uses the
> > > address returned by the DGA Extention.
> >
> > v4l-conf: using X11 display :0
> > dga: version 2.0
> > mode: 1024x768, depth=16, bpp=16, bpl=2048, base=0x401c7000
>
> > Memory at e0000000 (32-bit, non-prefetchable) [size=64M]
>
> That looks like a bug in the S3 driver, it seems to use the virtual
> address (i.e. what mmap() returns), not the physical one. That might
> break the v4l module too.
Arg, grumble gumble... I will check what address XFree86-3 returned
in the past and work with that, just using 0xe0000000 gives me a interleaved
overlay immage all over the place :(
Gerd, am I right in assuming your card gives out a DGA frameadress
inside the cards PCI address?
> > extention does not seem to support that mode...
>
> But the normal X-Protocol does :-)
Ah, right. ok
> > (And what does the 'Xvideo: no usable video port found'
> > mean? The list below contains 2 '[ok]'s...)
>
> There are two different kids of xvideo ports: The video ports (what you
> get with v4l loaded) which can be used to ask the X-Server to display
> video in window foo. -xv / -noxv switches this on/off.
When using the v4l module, it also sets (but now at X server starttime
- obvious) a frameaddress as DGA did. Same bug or it uses the same
address :(
> The other one are image scaling ports. These can be used to give the
> X-Server a yuv image and let the gfx card conversion + scaling. This is
> what the movie players are using (and xawtv tries to use in grabdisplay
> mode). -scale / -noscale enables/disabled this one.
>
> Are VIDEO_PALETTE_YUYV + VIDEO_PALETTE_YUV422 the same?
The Zoran does: (all 8 bit values)
Y1 V0 Y0 U0
I'm not sure what format corresponds with this. I choose
VIDEO_PALETTE_YVYU (and YUYV when I reverse some register bit)
Met vriendelijke groet,
Pauline Middelink
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