curioustorvald/tsvm
1
0
Fork 0
mirror of https://github.com/curioustorvald/tsvm.git synced 2026-06-06 05:28:31 +09:00
Code Issues Packages Projects Releases Wiki Activity

did it got fixed?

Browse Source
This commit is contained in:
minjaesong
2026-05-06 10:38:37 +09:00
parent d058f11329
commit 75ddfcde0f
10 changed files with 162 additions and 74 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
xm2taud.py
View File

@@ -858,9 +858,14 @@ def _xm_sample_to_proxy(inst: XMInstrument, samp: XMSample,
p.c2spd = max(1, round(8363.0 * (2.0 ** (semis / 12.0))))
loop_type = samp.flags & XM_SMP_LOOP_MASK
p.flags = 1 if loop_type != 0 else 0 # 1=loop on, 0=off
# Fadeout: XM stores 0..4095 (FT2 file format); 0 means "no fadeout"
# in FT2 — matches Taud's fadeStep semantics where 0 = held forever.
p.fadeout = min(0xFFF, inst.fadeout & 0xFFFF)
# Fadeout: XM file value (16-bit, spec range 0..0xFFF; MilkyTracker writes up to 32767
# to encode the "cut" UI slider position — SectionInstruments.cpp:499-500). FT2's per-tick
# decrement is stored / 32768 of unit volume; Taud's engine uses stored / 1024. Divide
# source by 32 (round-to-nearest) to match the per-tick rate. XM stored 1..15 round to
# Taud 0 — those originals were >11 min at 50 Hz, effectively no-fade. Stored 32 → Taud 1
# (~20 s). Stored 32767 (Milky cut sentinel) → Taud 1024 (1-tick cut). See terranmon.txt
# byte 172/173 and TAUD_NOTE_EFFECTS.md §1 "Volume Fadeout".
p.fadeout = min(0xFFF, (int(inst.fadeout & 0xFFFF) + 16) // 32)
p.vib_speed = inst.vib_rate # XM rate ↔ Taud "speed"
p.vib_depth = (inst.vib_depth * 2) & 0xFF # LoaderXM.cpp:217 scaling
p.vib_sweep = inst.vib_sweep & 0xFF
@@ -1308,12 +1313,10 @@ def assemble_taud(h: XMHeader, patterns: list, instruments: list) -> bytes:
# Flags byte:
# bit 1 (f) = Amiga pitch-slide mode (set when XM uses Amiga period table).
# bit 2 (m) = FT2 fadeout-zero policy (stored 0 ⇒ cut on key-off; fadeStep
# divisor 65536 — XM convention). Without this, the engine
# uses the IT divisor (1024), making fadeout ~64× faster
# than FT2 — voices with non-zero fadeout get silenced
# within a few ticks of key-off instead of fading naturally.
flags_byte = (0x00 if h.linear_freq else 0x02) | 0x04
# bit 2 = reserved (was 'm' fadeout-zero policy; removed). XM fadeout values are
# now scaled per-instrument above (÷32 with round-to-nearest), so the
# engine sees Taud-native units and uses its single divisor of 1024.
flags_byte = (0x00 if h.linear_freq else 0x02)
song_table = encode_song_entry(
song_offset=song_offset,
num_voices=C,