It's very WIP (the image decodes correctly on the worker, but I only see black on the canvas, however I see correct metadata).
I haven't updated all the references to the other decoders.
It loads the non-jpeg decoders as a module which I can't test, but probably breaks them. I also need to update the sync decoders, which likely doesn't work.
I don't think I'll have time to finish this, but posting it here in case it saves someone time or someone has the time to finish it up.
I was trying to see an xray that I got recently (happy to email it privately if it helps), which fails to decode on the demo with:
So this tries to update to openjpeg via https://github.com/mozilla/pdf.js/pull/17946, which should support it. However:
I don't think I'll have time to finish this, but posting it here in case it saves someone time or someone has the time to finish it up.
Thanks.