[sldev] OpenJPEG vs KDU

Dirk Moerenhout blakar at gmail.com
Wed Jun 27 02:03:28 PDT 2007


Have these patches been submitted to the OpenJPEG maintainers? Do you
think there would be any resistance from them in getting them applied?
Given I'm located very near to them I wouldn't mind lending a hand
when it comes to communication.

Where can I get these patches?

Dirk aka Blakar Ogre

On 6/27/07, Callum Lerwick <seg at haxxed.com> wrote:
> On Wed, 2007-06-27 at 01:39 +0200, Dirk Moerenhout wrote:
> > Ok, in light of VWR-866 I'm wondering what it would take for OpenJPEG
> > to replace KDU. I've heard that KDU would be faster. Anybody has an
> > idea on how much? I've build OpenJPEG 1.2 with VS2005 and did a quick
> > check using CodeAnalyst. A few minutes after my first run I got a 0.5%
> > benefit with 1 minor change. That may sound minor but given the
> > simplicity of the change I guess some real effort would give us quite
> > a bit more.
>
> I've revived Dzonatas DWT vectorization patch, which results in a
> significant speedup. Especially combined with my T1
> vectorization/cleanup patch which can pass floating point data direct
> from T1 to DWT.
>
> I've got a bunch of patches lined up I really need to finish off and
> submit...
>
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