Skip to content

feat(codec): PR-X12 v1 — λ-RDO mode selection + rANS entropy coder #211

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
AdaWorldAPI merged 3 commits into from
May 27, 2026
Merged

feat(codec): PR-X12 v1 — λ-RDO mode selection + rANS entropy coder #211

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
52e44f5
feat(codec): PR-X12 v1 — λ-RDO mode selection + rANS entropy coder
claude May 27, 2026
347f36d
docs(codec): clarify Merge-vs-Delta tie comment per P2 review
claude May 27, 2026
ed6f3ba
fix(codec): reject ANS streams with n>0 but an empty freq table
claude May 27, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 4 additions & 2 deletions .claude/blackboard.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -34,8 +34,10 @@
## Consolidation-sprint debt (PR-X program; ground-truthed `ls src/hpc/` 2026-05-27)
> Shipped-state vs `pr-master-consolidation.md`. Landed: ✅ **PR-X10** `linalg/`,
> ✅ **PR-X11** `pillar/`, ✅ **PR-X13** `ogit_bridge/`, ✅ **PR-X3** `blocked_grid/`.
- **PR-X12 codec ⚠️ PARTIAL** — `src/hpc/codec/` has `ctu/mode/predict/mod` only;
**RDO + ANS entropy stages missing**. Doc-canon merged (#198/#205), kernel half-built.
- **PR-X12 codec ⚠️ v1 NEAR-COMPLETE** — `ctu/mode/predict` + now **`rdo` (A6, λ-RDO,
integer fixed-point λ_q8 — no float) + `ans` (A7, static-table rANS over the 4-symbol
mode alphabet, bit-exact round-trip)**. Remaining: `transform` (A4, deferred to v2 per
design Q2) + `stream` (A8, framing over `ans`). 81 lib + 20 doctests green, clippy clean.
- **PR-X4 splat4d ❌ OUTSTANDING** — no `src/hpc/splat4d/`. Unbuilt.
- **PR-X9 cognitive ❌ OUTSTANDING** — no `src/hpc/cognitive/`. Unbuilt; must **consume**
`lance-graph-contract::splat::CamPlaneSplat` (q8), never redefine it (contract is sacred).
Expand Down
Loading
Loading