Claude
9ed6f2a8d8
Investigated multi-segment Tran continuation but couldn't crack it. Each hypothesis tried (segment header consumes 0/1/2 T deltas, blocks continue Tran with various interpretations) breaks at sample ~512. Block budget for V70 segment 1: 264 nibbles + 244 RLE zeros = 508 deltas — exactly the segment size. So the block structure CAN encode 508 single-channel samples, but applying segment 1 blocks as Tran gives wrong values. Most likely the channel ordering changes in segment 1+ (e.g., segment 0 = Tran, segment 1 = Vert, segment 2 = Long, etc.) but I couldn't verify cleanly. Stopping here — segment-0 Tran decode is solid and multi-segment work needs more fresh thinking.
29 lines
1.2 KiB
Python
29 lines
1.2 KiB
Python
"""Dump all blocks in segment 1 of each event with their data."""
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import sys
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sys.path.insert(0, ".")
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from minimateplus.waveform_codec import walk_body, find_data_start
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def main():
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for stem in ("M529LL1A.SP0", "M529LL1L.JQ0", "M529LL1L.V70"):
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path = f"decode-re/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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blocks = walk_body(body, find_data_start(body))
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# Find segment 1 (between first and second 40 02)
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seg40_indices = [i for i, b in enumerate(blocks) if b.tag_hi == 0x40]
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if len(seg40_indices) < 2:
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print(f"\n{stem}: only {len(seg40_indices)} segment headers found")
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seg1_blocks = blocks[seg40_indices[0]:] if seg40_indices else []
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else:
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seg1_blocks = blocks[seg40_indices[0]:seg40_indices[1]+1]
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print(f"\n=== {stem} segment 1 ({len(seg1_blocks)} blocks) ===")
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for b in seg1_blocks[:25]:
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tag = f"{b.tag_hi:02x}{b.tag_lo:02x}"
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print(f" off={b.offset:>5} {tag} NN=0x{b.tag_lo:02x}({b.tag_lo:>3}) len={b.length:>3} data={b.data[:16].hex(' ')}{'...' if len(b.data)>16 else ''}")
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if __name__ == "__main__":
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main()
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