libjpeg's encoder drops trailing zero bytes, so a flat tail of a few thousand blocks decodes from zeros supplied at EOI. Damage is data that runs to the end of the file or a lost restart marker. whitetail-ari.jpg (cjpeg -arithmetic) and its Huffman transcode cover it.
tests/mutation.rs runs a seeded mutation pass over the test images and
small SOF9, SOF10 and 12-bit seeds, checking that decode never panics
and stays within small limits. fuzz/ is a cargo-fuzz crate (own
workspace) with a decode target and those seeds. jpeg.yml runs fmt,
clippy, tests and a wasm32 check on Linux. The README gains a testing
section.
Commit testorig.jpg, testimgari.jpg and testorig12.jpg with a jpegtran
Huffman transcode of testimgari.jpg and libjpeg-turbo's 12-bit decode
of testorig12.jpg. The arithmetic-coded image must match its transcode
exactly; the 8-bit and 12-bit decodes are compared against zune-jpeg
and libjpeg-turbo within a small tolerance. Replaces the ignored
conformance_samples test.
aiongg