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3 Commits
Author SHA1 Message Date
aiongg b4e764e44c jpeg: conformance fixtures for jpegtran's progressive and 12-bit arithmetic transcodes 2026-10-24 22:04:21 +00:00
aiongg e96bf9552b jpeg: arithmetic scans take zeros at a marker without limit 
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.
 2026-10-24 22:02:59 +00:00
aiongg f28de79037 jpeg: conformance tests against the libjpeg-turbo test images 
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.
 2026-10-24 20:49:41 +00:00