[mythtv] [patch] ViaSlice Interlaced Playback

[Steven Cruysberghs]

Hi Kenneth,

Great work on the Viaslice stuff. I just got my epia M10k a few days ago
and managed to get the hardware decoding to work (kernel 2.4.26-epia1
that proved v4l_via.drv, CVS unichrome driver for via_drv.o and the
opensource libddmpeg, PVR250 capture and X-resolution = 720x576). Today
I tried adding this Interlaced playback patch and the qmatrix one from
june 20.
It works but I'm afraid I the only difference I notice is a flickering
OSD when using the patches. Quality doesn't seem to improve.
The image on the TV still seems deinterlaced to me.


I case anyone is intrested :
I compared quite a few tv-out options recently and this is my personal
ranking at the moment :
1 PVR350 tvout 
2 Pundit's Sis TV-out
3 Epia M10k equal to Geforce 4MX

Since the pundits with sis chipset no longer seem to be available and
the PVR350 doesn't playback anything but MPEG2 the epia seems the best
choice at the moment if you want to use all myth's modules and you don't
mind grayscale OSD in TV playback.

Steven

PS I still wonder why playing back recordings on the EPIA with mplayer,
without HW decoding, only has 40% processorload while myth has 95% and
skips.

Op wo 09-06-2004, om 14:56 schreef Kenneth Aafløy:
> On Wednesday 09 June 2004 14:03, Kenneth Aafløy wrote:
> > Hi there!
> >
> > This is my current patch with will give perfect flicker free 180 degree
> > pans on your epia, the PVR350 has to step aside and let the epia share the
> > top of the hill :)
> >
> > It's a perliminary patch, which might not work on your setup, because of
> > the fact that it also contains a doubling of the available frames in an
> > attempt to implement color-osd. Unfortunatly I have to do some DMA
> > transfers from the decoder target buffers, or be able to move the decoder
> > target buffers to main memory and then transfer them to display memory to
> > get acceptable
> > performance. A transfer from one of the decoder buffers to main memory will
> > push the cpu util of my epia to 90-100%, so it just won't work if the
> > blending to a xv12 buffer is to be added on top of that + the transfer back
> > to display memory (this path is very fast). If you find that this patch
> > will crash your epia, you should focus on the Show function in
> > videoout_viaslice.cpp + the two segments added to Drawslice, and drop the
> > rest of the patch.
> 
> Here is a proper version for CVS, if someone can confirm that the buffer 
> increase is working for them too.
> 
> Kenneth
> 
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