video: separate repacking code from zimg and make it independent

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For whatever purpose. If anything, this makes the zimg wrapper cleaner.

The added tests are not particular exhaustive, but nice to have. This
also makes the scale_zimg.c test pretty useless, because it only tests
repacking (going through the zimg wrapper). In theory, the repack_tests
things could also be used on scalers, but I guess it doesn't matter.

Some things are added over the previous zimg wrapper code. For example,
some fringe formats can now be expanded to 8 bit per component for
convenience.

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wm4

2020-05-09 17:56:44 +02:00

parent d61ced37ae

commit d8002f1dde

9 changed files with 1697 additions and 904 deletions

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