[theora-dev] optimization for OLPC

[Chih-Chung Chang]

I downloaded 1.0alpha7 and theora-exp.
It seems theora-exp decodes faster on large resolutions.
But I found the output of the two decoders do not always match:

$ ./libtheora-1.0alpha7.orig/examples/dump_video pixel_aspect_ratio.ogg  > aa
$ ./theora-exp/examples/dump_video pixel_aspect_ratio.ogg > bb
$ cmp aa bb
aa bb differ: char 2129025, line 25

Is it a bug or expected?
[The file pixel_aspect_ratio.ogg is from
http://www.v2v.cc/~j/theora_testsuite/ :) ]

AFAIK the FPGA on OLPC is only temporarily before some ASIC is done.
OLPC has a camera on it, do you think it's possible to use Theora on
320x240 at 15fps for real-time encoding/decoding?

Thanks,
Chih-Chung Chang

On 2/20/07, j at v2v.cc <j at v2v.cc> wrote:
> hi,
>
> right now nobody is working on specific optimization for OLPC;
> since it is a i386 cpu the mmx / mmxext code in theora-trunk,
> but also the one in theora-exp for decoding should work.
>
> not sure if there are other places for optimization, possibly
> the FPGA board of the OLPC. again, nobody working on that
> right now.
>
> j
>
> On Feb 19, 2007, at 20:40:52, Chih-Chung Chang wrote:
>
> > Hi,
> >
> > I heard that Theora will be used on OLPC.
> > Is anyone working on optimization for OLPC?
> >
> > Regards,
> > Chih-Chung Chang
> > _______________________________________________
> > theora-dev mailing list
> > theora-dev at xiph.org
> > http://lists.xiph.org/mailman/listinfo/theora-dev
> >
>
>