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fix: no-param note handling divergence

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minjaesong
2026-05-03 15:10:36 +09:00
parent 5d968fecf5
commit c7e7ee650d
5 changed files with 80 additions and 96 deletions
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44
tsvm_core/src/net/torvald/tsvm/peripheral/AudioAdapter.kt
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@@ -1553,9 +1553,10 @@ class AudioAdapter(val vm: VM) : PeriBase(VM.PERITYPE_SOUND) {
voice.basePitch = noteVal
voice.amigaPeriod = -1.0 // fresh trigger: period state must reseed from the new noteVal
voice.playbackRate = computePlaybackRate(inst, noteVal)
if (volOverride >= 0) {
voice.channelVolume = volOverride.coerceIn(0, 0x3F)
}
// Fresh trigger resets channel volume to full ($3F). Per-instrument scaling lives in
// instGlobalVolume (byte 171), which the mixer applies as a multiplier. Converters
// therefore no longer need to emit SEL_SET=Sv on note-trigger rows.
voice.channelVolume = if (volOverride >= 0) volOverride.coerceIn(0, 0x3F) else 0x3F
voice.rowVolume = voice.channelVolume
voice.noteWasCut = false
voice.noteFading = false
@@ -1793,7 +1794,11 @@ class AudioAdapter(val vm: VM) : PeriBase(VM.PERITYPE_SOUND) {
// ── Note ──
val toneG = (row.effect == EffectOp.OP_G)
when (row.note) {
0xFFFF -> {} // no-op
// No note but an instrument byte is present: latch the instrument so
// the *next* note-only trigger picks up the right sample. Trackers
// call this an "instrument-only retrigger"; in MOD/S3M/IT the sample
// keeps playing, but the channel's instrument reference advances.
0xFFFF -> { if (row.instrment != 0) voice.instrumentId = row.instrment }
0x0000 -> { voice.keyOff = true; voice.active = false } // key-off; breaks sustain loop
0xFFFE -> voice.active = false // note cut
else -> {
@@ -1806,7 +1811,10 @@ class AudioAdapter(val vm: VM) : PeriBase(VM.PERITYPE_SOUND) {
voice.noteDelayTick = (row.effectArg ushr 8) and 0xF
voice.delayedNote = row.note
voice.delayedInst = row.instrment
voice.delayedVol = if (row.volume >= 0) row.volume else -1
// Only treat the vol cell as an override when it carries SEL_SET;
// SEL_FINE/0 (no-op) and slide selectors must not collapse into
// a SET=0 on the deferred trigger.
voice.delayedVol = if (row.volumeEff == 0) row.volume else -1
} else {
applyDuplicateCheck(ts, vi, row.instrment, row.note)
maybeSpawnBackgroundForNNA(ts, voice, vi)
@@ -2211,10 +2219,12 @@ class AudioAdapter(val vm: VM) : PeriBase(VM.PERITYPE_SOUND) {
// Auto-vibrato (instrument-supplied sample LFO) — added on top of pitchToMixer.
val autoVibDelta = advanceAutoVibrato(voice, inst)
// Pitch envelope contribution: env value 0..1, 0.5 = unity. -32..+32
// semitone range maps to ±32 × 4096/12 ≈ ±10923 4096-TET units.
// Pitch envelope contribution: env value 0..1, 0.5 = unity.
// IT pitch envelope max is ±16 semitones (Schism sndmix.c:455-462 indexes
// linear_slide_up_table[abs(envpitch)] where envpitch ∈ [-256,+256] and
// table[255] = 65536·2^(255/192) ≈ 2.504, i.e. 15.94 semitones).
val pitchEnvDelta = if (voice.hasPfEnv && voice.pfEnvOn && !voice.envPfIsFilter)
((voice.envPfValue - 0.5) * 2.0 * 32.0 * 4096.0 / 12.0).toInt()
((voice.envPfValue - 0.5) * 2.0 * 16.0 * 4096.0 / 12.0).toInt()
else 0
val finalPitch = (pitchToMixer + autoVibDelta + pitchEnvDelta).coerceIn(0, 0xFFFE)
@@ -2236,13 +2246,18 @@ class AudioAdapter(val vm: VM) : PeriBase(VM.PERITYPE_SOUND) {
// Refresh biquad filter coefficients once per tick (only recomputes when changed).
refreshVoiceFilter(voice)
// Volume fadeout: after key-off OR Note-Fade NNA, decrement by inst.volumeFadeout / 65536 per tick.
// The 12-bit fadeout value is split across volumeFadeoutLow + low nibble of fadeoutHigh.
// Stored 0: with fadeoutCutOnZero (FT2 mode) the voice is cut on key-off; otherwise no fadeout (IT mode).
// Volume fadeout: after key-off OR Note-Fade NNA, decrement per tick.
// The 12-bit fadeStep is split across volumeFadeoutLow + low nibble of fadeoutHigh.
// Divisor selects per-tracker semantics:
// FT2 mode (fadeoutCutOnZero=true): fadeStep / 65536 per tick — matches FT2 .XM (16-bit accumulator, decrement = stored).
// IT mode (fadeoutCutOnZero=false): fadeStep / 1024 per tick — matches Schism (sndmix.c:331-339 + effects.c:1261:
// accumulator 65536, decrement = (stored<<5)<<1 = stored·64).
// Stored 0: FT2 mode cuts on key-off; IT mode leaves voice playing (no fade).
if (voice.keyOff || voice.noteFading) {
val fadeStep = inst.volumeFadeoutLow or ((inst.fadeoutHigh and 0x0F) shl 8)
if (fadeStep > 0) {
voice.fadeoutVolume = (voice.fadeoutVolume - fadeStep / 65536.0).coerceAtLeast(0.0)
val divisor = if (ts.fadeoutCutOnZero) 65536.0 else 1024.0
voice.fadeoutVolume = (voice.fadeoutVolume - fadeStep / divisor).coerceAtLeast(0.0)
if (voice.fadeoutVolume <= 0.0) voice.active = false
} else if (ts.fadeoutCutOnZero) {
voice.active = false
@@ -2297,7 +2312,8 @@ class AudioAdapter(val vm: VM) : PeriBase(VM.PERITYPE_SOUND) {
if (bg.keyOff || bg.noteFading) {
val fadeStep = inst.volumeFadeoutLow or ((inst.fadeoutHigh and 0x0F) shl 8)
if (fadeStep > 0) {
bg.fadeoutVolume = (bg.fadeoutVolume - fadeStep / 65536.0).coerceAtLeast(0.0)
val divisor = if (ts.fadeoutCutOnZero) 65536.0 else 1024.0
bg.fadeoutVolume = (bg.fadeoutVolume - fadeStep / divisor).coerceAtLeast(0.0)
} else if (ts.fadeoutCutOnZero) {
bg.active = false
bgIt.remove()
@@ -2307,7 +2323,7 @@ class AudioAdapter(val vm: VM) : PeriBase(VM.PERITYPE_SOUND) {
// Auto-vibrato keeps running on backgrounds — it's an instrument-intrinsic LFO.
val autoVibDelta = advanceAutoVibrato(bg, inst)
val pitchEnvDelta = if (bg.hasPfEnv && bg.pfEnvOn && !bg.envPfIsFilter)
((bg.envPfValue - 0.5) * 2.0 * 32.0 * 4096.0 / 12.0).toInt()
((bg.envPfValue - 0.5) * 2.0 * 16.0 * 4096.0 / 12.0).toInt()
else 0
val finalPitch = (bg.noteVal + autoVibDelta + pitchEnvDelta).coerceIn(0, 0xFFFE)
bg.playbackRate = computePlaybackRate(inst, finalPitch)