ZBar is an open source software suite for reading bar codes from various sources, including webcams. As its development stopped in 2012, I took the task of keeping it updated with the V4L2 API. This is the main repository for it. There's a clone at at LinuxTV.org, and another one at gitlab.
To the best of my knowledge all the work was done by @bastien-roucaries / Remi Meier. I just took the patches from https://salsa.debian.org/debian/zbar/-/tree/master/debian/patches and made them apply.
I hope this helps upstream to review the changes as requested in #263 (comment).
Fix #263