Claude
ae0e17b5dc
Three things to make pickup smoother: 1. analysis/README.md (NEW): catalogues the ~25 scratch scripts. Categorizes them as "still useful" / "superseded — keep for archaeology" / "pure exploration". Tells a fresh engineer which files to read first and which to ignore. 2. scratch/next_experiment_skeleton.py (NEW): stub + spec for the segment-channel scoring analyzer. Includes the fixture loader, block walker, and decode-segment-as-channel helper — just enough scaffolding that the next pass starts from "fill in score_segment_against_all_channels()" rather than from scratch. Already runs and confirms 13 segments per 3-sec event with sample starts going to 6590 (way past the 3328 actual samples) — strong evidence that not all segments carry Tran. 3. Removed decode-re/ duplicate. It was a mirror of tests/fixtures/. Analysis scripts that hardcoded decode-re/ paths updated to point at tests/fixtures/. CLAUDE.md note updated: future event uploads go directly into a dated subdirectory under tests/fixtures/. All 40 tests still pass. Skeleton runs.
72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
"""Test: does the second '20 NN' block in SS0 continue Tran samples?"""
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import sys
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sys.path.insert(0, ".")
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from analysis.load_bundle import _parse_txt
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from minimateplus.waveform_codec import walk_body, find_data_start
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def s4(n):
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return n if n < 8 else n - 16
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def i8(b):
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return b if b < 128 else b - 256
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def main():
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stem = "M529LL1A.SS0"
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path = f"tests/fixtures/5-11-26/{stem}"
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with open(path, "rb") as f:
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body = f.read()[43:-26]
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_, samples = _parse_txt(path + ".TXT")
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truth_T_16 = [round(v * 200) for v in samples["Tran"]]
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# Preamble
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T0 = int.from_bytes(body[3:5], "big", signed=True)
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T1 = int.from_bytes(body[5:7], "big", signed=True)
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# Walk blocks
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start = find_data_start(body)
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blocks = walk_body(body, start)
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print(f"=== {stem} === T[0]={T0} T[1]={T1}")
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# Hypothesis: Tran continues through ALL 10 NN and 20 NN blocks
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# in order, until the next 40 02 segment header (which resets).
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T = [T0, T1]
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cur = T1
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decoded_count = 2 # T[0], T[1] from preamble
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for bi, blk in enumerate(blocks):
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if blk.tag_hi == 0x10:
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for byte in blk.data:
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for nib in ((byte >> 4) & 0xF, byte & 0xF):
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cur += s4(nib)
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T.append(cur)
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decoded_count += 1
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elif blk.tag_hi == 0x20:
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for byte in blk.data:
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cur += i8(byte)
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T.append(cur)
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decoded_count += 1
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elif blk.tag_hi == 0x40:
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# Segment header — stop here for this test
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break
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# 00 and 30 NN don't contribute to Tran (in this hypothesis)
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# Compare to truth
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print(f" Decoded {len(T)} T samples up to first 40 02")
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matches = sum(1 for i in range(min(len(T), len(truth_T_16))) if T[i] == truth_T_16[i])
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print(f" Matches in first {min(len(T), len(truth_T_16))}: {matches}")
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# Print first divergence
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for i in range(min(len(T), len(truth_T_16))):
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if T[i] != truth_T_16[i]:
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print(f" First divergence: sample {i}: pred={T[i]}, truth={truth_T_16[i]}")
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# Show context
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print(f" pred [{i-3}:{i+5}]: {T[max(0,i-3):i+5]}")
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print(f" truth [{i-3}:{i+5}]: {truth_T_16[max(0,i-3):i+5]}")
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break
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if __name__ == "__main__":
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main()
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