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minjaesong
2026-04-29 14:29:18 +09:00
parent 191c733913
commit 176766b793
1 changed files with 6 additions and 4 deletions
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10
it2taud.py
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@@ -311,10 +311,12 @@ def _it214_decompress_block(payload: bytes, num_samples: int,
continue
elif width < init_width:
# Mid form: top `range_count` representable values are escape codes
border = (1 << width) - range_count
if v >= border:
new_w = (v - border) + 1 # 1..range_count
# Mid form: escape codes are in the top half of the unsigned range.
# border = (2^(width-1)) - range_count (= (0x100 >> (9-width)) - 8 per reference).
# Escape if v > border; new width = v - border (adjusted for skip-over-self).
border = (1 << (width - 1)) - range_count
if v > border:
new_w = v - border # 1..range_count
if new_w >= width:
new_w += 1
width = new_w