[maemo-developers] N800 & Video playback

[From: Siarhei Siamashka]

On Tuesday 01 May 2007 13:36, Kalle Vahlman wrote:
> 2007/5/1, Siarhei Siamashka <siarhei.siamashka at gmail.com>:
> > OK, thanks. It may take some time though. I'm still using old scratchbox
> > with mistral SDK here (did not have enough free time to upgrade yet).
> > Until I clean up my scratchbox mess, I can only provide some patch
> > without testing, if anybody courageous can try to build it :)
>
> Given that I fear not the perils of building a X server with
> nonstandard options[1], I shall be more than happy to conduct such
> adventurous acts :)
>
> And unless Mr. Kulve has objections, the results could be installed
> from a repository as well.
>
> [1] 
> 
http://syslog.movial.fi/archives/47-Shadows-for-everyone-well,-not-really.html

OK, here is this untested a patch for xserver to add ARMv6 optimized 
YUV420 color format conversion. Theoretically it should compile
(I did not try to build xserver myself though) and work. If it refuses to
compile, fixing the patch should be not too difficult.

In the worst case only video playback may be broked. But if everything works
as expected, video output performance should become a lot better.

Video output performance can be tested by mplayer using -benchmark 
option, 'VO:' stat shows how much time was used for video output, 'VC:' stat
shows how much time was used for video decoding.

Built-in video player also should become faster. I don't know if this
improvement can be 'scientifically' benchmarked, but it should drop less
frames on high resolution video playback.

If any of you can build xserver package with this patch, please put it for
download somewhere or send directly to me.

Thanks.
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