65fde6d298
Own DEFLATE decoder replaces zlib dependency
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Zephyr bundles no zlib — the CONFIG_ZLIB select was a no-op and the
string path returned errors on device. src/inflate.c: minimal raw
DEFLATE (RFC 1951) decompressor, no allocation; one code path for
host and Zephyr. Host round-trip: 42,000 vectors through the real
compiled blobs, 0 mismatches.
2026-07-03 11:37:19 +08:00
404cd2a334
Debug bisect toggles: STENO_DEBUG_NO_GATT, STENO_DEBUG_NO_EMBED
2026-07-03 11:02:34 +08:00
9bf21c9db2
v4 union split-section dictionary: both full dicts, zero trimming
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Format v4 (docs/FORMAT_V4.md): one union CHD MPHF over 226,791 stroke
keys from Plover (147,424) + Lapwing (114,885), sections distributed
across halves. Left blob 387KB (displacements log-class Huffman 59KB,
membership 57KB, fingerprints 113KB, conflicts 9.6KB, value-index
slice 157KB); right blob 515KB (strings front-coded+deflate 193KB,
value-index remainder 324KB, conflicts dup). Shared string table:
73,464 unique translations, Lapwing 93% subset of Plover.
- tools/compile_v4.py: encoder + full verification (all 262,309
entries byte-exact through cold decode path; hard error if either
blob exceeds budget — never trims)
- src/dict_v4.c/.h: decoder — canonical Huffman displacement decode,
conflict binary search, FC block walk, 2-block LRU cache
- src/behavior_steno.c: Plover-style sliding longest-match with
retrace replaces multi-stroke timeout + prefix checks
- src/split_dict.c/.h: protocol v4 — GET_STRING(string_id) /
RESOLVE(slot, dict); decisions are 100% left-local, BLE only for
translation text
- CMake/Kconfig: STENO_DICT_BOTH default, one compiler run emits both
half blobs; legacy MPHF path kept behind STENO_DICT_V4=n
- Host round-trip test: 42,000 vectors left→right split path,
0 mismatches (tests/test_dict_v4.c)
2026-07-03 01:28:31 +08:00
28e0c1a49f
Never trim dictionary — hard error if over budget
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Removed all trimming/auto-trim logic. Build fails if compiled dict
exceeds flash budget. CHD now uses spare slots (1.23x load factor)
and fewer buckets (entry_count/5) for reliable construction at any
entry count. Binary format bumped to v3: header stores slot_count
and entry_count separately.
2026-07-02 15:39:52 +08:00
0908dc7c85
Right-heavy dict partition: 150KB left, 500KB right
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Central has more code overhead (behavior, formatter, output, undo,
BLE client) → smaller dict budget. Peripheral is lean → gets bulk
of dict. Ratio-based partition replaces fixed bytes-per-entry estimate.
Full 147K Plover dict, zero trimming target.
2026-07-02 14:30:12 +08:00
20218fa2ab
True split-dict: partition dictionary across both halves
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Importance-based partitioning — highest-importance entries on left
(central) for zero-latency local lookup, remainder on right
(peripheral) queried over BLE on miss. Both halves embed their own
MPHF binary. Configurable block size for tighter compression.
2026-07-02 14:27:37 +08:00
bc2e40caf4
Merge split-storage: BLE GATT dict protocol + split-aware build
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Combined optimize-dict (MPHF compression, block-compressed strings,
formatter, undo, Unicode output) with split-storage (BLE GATT service,
LRU cache, peripheral-side dict embed).
Split-dict mode: central queries peripheral over BLE.
Non-split mode: dict embedded on central, local lookup.
2026-07-02 08:57:32 +08:00
2af45eafce
Steno engine with BLE split-storage architecture
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Full steno engine: chord detection, MPHF/trie dict lookup, Plover
formatter (18 commands), undo (ring buffer), HID + Unicode output.
Split-storage specific:
- BLE GATT service for dict queries (query/prefix/batch)
- LRU cache on central side (CONFIG_STENO_SPLIT_CACHE_SIZE)
- Dict embedded on peripheral, engine runs on central
- 3-way dispatch: split_dict / MPHF / simple trie
Build system: auto-fetch Plover dict, MPHF compiler with block
compression (~56K entries in 420KB), CMake integration.
2026-07-02 02:06:37 +08:00
1ec204b845
Scaffolding: ZMK module structure, Kconfig, DTS, behavior driver
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- zephyr/module.yml with dts_root for dt-bindings
- Kconfig: STENO_ENGINE, dict selection (Plover/Lapwing/test),
MPHF toggle, Unicode modes, history size, multi-stroke timeout
- DTS behavior binding (one_param, steno key index)
- behavior_steno.c: chord accumulation, all-up detection,
multi-stroke buffering with timeout, star undo, formatter pipeline,
3-way dict dispatch (split/MPHF/simple trie)
- dict_embed.S: .incbin from generated header path
- steno_keys.h: 23-key layout, bit positions matching compiler
2026-07-02 02:04:28 +08:00
