Integration follow-through on the merged jpegai_decode: make the decoder visible
where the standard describes itself, and get it into the cross-arch matrix.
SPEC/docs:
- Register `wai.image.jpegai` in SPEC.md §5 (neural table) — a live, dispatchable
capability was absent from the normative menu. Framed as decode-equivalence: one
pinned reconstruction of an ISO/IEC 6048 codestream to RGB, reproducible on every
machine (a portable decoded-pixel hash), entropy/dequant integer-exact, synthesis
within 1 LSB of the reference.
- CHANGELOG entry for the byte-exact codestream→RGB decoder, distinguishing its
decode-equivalence profile from the all-i64 hash-portable in-house codecs.
- Fix the stale CAP_IMAGE_JPEGAI comment ("decoder library not yet in this crate" —
untrue post-merge) and drop its "~30% over conventional SOTA" comparison.
byte-exact-conformance:
- The crate did not compile on main: `rans.rs` was moved out of `neural/` to the
wai-rs crate root, but the shim still #[path]-included the old `neural/rans.rs`;
the moved file also references `crate::int_entropy`. Repoint rans to the crate
root and shim `int_entropy` (self-contained). This restores the cross-arch
byte-equality build.
- Add a golden that decodes the same ISO reference mANS stream through the MERGED
decoder's entropy stage (crate-root `jpegai_mans`, flat-table/sliced-offset API)
and asserts the identical symbols. The decoder `wai.image.jpegai` actually
reconstructs with is now in the byte-equality matrix, not only the older
`neural/` port. 15 conformance tests pass.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
c4475c4ecb