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Read and patch UE3 packages and soundbanks

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Cristian Gora
2026-10-09 19:38:57 +02:00
parent b3c9b84dc7
commit 61bbf26f3b
10 changed files with 734 additions and 11 deletions
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NOTES.md
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@@ -16,8 +16,10 @@
(music heard in game ncc 1.0, reverts byte-identical, speech line apply/revert byte-identical).
- Mission 3 (2026-10-09, brief: `docs/history/mission3_audio_text_prompt.md`): full-game audio, then subtitle
and menu text editing. Plan (one commit per stage; a stage = code + tests + docs + this status):
1. [ ] `ackit/lzo.py`, `ackit/upk.py` (UE3 package summary, compressed chunks, block-level read/patch),
`ackit/bnk.py` (bank parsing: DIDX/DATA/HIRC sources, prefetch). Unit + real-game read-only tests.
1. [x] `ackit/lzo.py`, `ackit/upk.py` (UE3 package summary, compressed chunks, block-level read/patch),
`ackit/bnk.py` (bank parsing: DIDX/DATA/HIRC sources). Docs: formats/upk.md, banks.md. Findings: pure-Python
LZO ~47 MB/s (== decompress.exe on every block); 15,800 media IDs in 96,011 copies, 396 are prefetch heads
of WAD sounds (2,101 copies) -> 15,404 in-memory sounds; copies identical except 1C898731.
2. [ ] Catalog of in-memory sounds (archive `BANK`): build from loose banks + packages, location index,
names/categories, prefetch handling; `ackit verify --catalog` cross-check (missing/extra/duplicate/
character/category/language) + test.