Re: [sldev] Crash reports analysis [http-texture builds]

[Dzonatas Sol]

Robin Cornelius wrote: 3. Since this bug isn't fixed in OpenJPEG 1.3, but the release timeline for OpenJPEG 2.0 doesn't look clear, what would be the odds of convincing the OpenJPEG team to ship an OpenJPEG 1.3.1. We've got a strong preference to stick with releases rather than svn snapshots. 2.0 does not look likely soon. The people behind openjpeg are quite busy. Dzontas has got 2.0 working with secondlife but there are remaining issues mainly to do with progressive downloads i believe. May be he can comment further on exactly what is wrong. A little research through the OpenJPEG threads reveal that some of the team were away (Artic). I tried to ping them but one turns up with an invalid mail address (was a school address). I'm not sure if the main programmer has received my mail, as even I have had to juggle mail addresses lately. OpenJPEG 2.0 fully works with alpha (yay!), but it does not support truncated streams. My tests of it installed in the sl-viewer show its performance is good. It appears like it fails gracefully when it hits a truncated stream, but I found that to be unstable when a deallocation could randomly cause a crash. The OpenJPEG standard expects the decoders to handled truncated streams, so a fix to allocate/deallocate truncated streams now seems futile, as it would be better to just fully implement the code to handle truncated streams. I would also like to toss in the mix that openjpeg 1.2, 1.3 or even back to 0.97 has issues with encoding alpha and ends up with the entire alpha channel set to 128 v2.0 fixes this issue, but i believe there is no clear backport to 1.3 for this problem currently. Not impossible to backport, but highly impractical to throw lots of free time at it to get it done when it would more worthwhile time spent to get truncated streams to work in 2.0. If Jerome has made progress on that and just hasn't posted the progress yet, I hate to step on toes. Best to wait for the pong?

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