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pmp_main.c
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/* - main XM replayer -
**
** NOTE: Effect handling is slightly different because
** I've removed the channel muting logic.
** Muted channels would only process *some* effects, but
** since we can't mute channels, we don't care about this.
**
** In FT2, the only way to mute a channel is through the
** tracker itself, so this is not really needed in a replayer.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include "pmplay.h"
#include "pmp_mix.h"
#include "snd_masm.h"
#include "tables.h"
#define MAX_FRQ 32000
#define MAX_NOTES (10*12*16+16)
static tonTyp nilPatternLine[32]; // 8bb: used for non-allocated (empty) patterns
typedef void (*volKolEfxRoutine)(stmTyp *ch);
typedef void (*volKolEfxRoutine2)(stmTyp *ch, uint8_t *volKol);
typedef void (*efxRoutine)(stmTyp *ch, uint8_t param);
static void retrigVolume(stmTyp *ch)
{
ch->realVol = ch->oldVol;
ch->outVol = ch->oldVol;
ch->outPan = ch->oldPan;
ch->status |= IS_Vol + IS_Pan + IS_QuickVol;
}
static void retrigEnvelopeVibrato(stmTyp *ch)
{
// 8bb: reset vibrato position
if (!(ch->waveCtrl & 0x04))
ch->vibPos = 0;
/*
** 8bb:
** In FT2.00 .. FT2.09, if the sixth bit of "ch->waveCtrl" is set
** (from effect E7x where x is $4..$7 or $C..$F) and you trigger a note,
** the replayer interrupt will freeze / lock up. This is because of a
** label bug in the original code, causing it to jump back to itself
** indefinitely.
*/
// 8bb: safely reset tremolo position
if (!(ch->waveCtrl & 0x40))
ch->tremPos = 0;
ch->retrigCnt = 0;
ch->tremorPos = 0;
ch->envSustainActive = true;
instrTyp *ins = ch->instrSeg;
if (ins->envVTyp & ENV_ENABLED)
{
ch->envVCnt = 65535;
ch->envVPos = 0;
}
if (ins->envPTyp & ENV_ENABLED)
{
ch->envPCnt = 65535;
ch->envPPos = 0;
}
ch->fadeOutSpeed = ins->fadeOut; // 8bb: ranges 0..4095 (FT2 doesn't check if it's higher than 4095!)
// 8bb: final fadeout range is in fact 0..32768, and not 0..65536 like the XM format doc says
ch->fadeOutAmp = 32768;
if (ins->vibDepth > 0)
{
ch->eVibPos = 0;
if (ins->vibSweep > 0)
{
ch->eVibAmp = 0;
ch->eVibSweep = (ins->vibDepth << 8) / ins->vibSweep;
}
else
{
ch->eVibAmp = ins->vibDepth << 8;
ch->eVibSweep = 0;
}
}
}
static void keyOff(stmTyp *ch)
{
instrTyp *ins = ch->instrSeg;
if (!(ins->envPTyp & ENV_ENABLED)) // 8bb: probably an FT2 bug
{
if (ch->envPCnt >= (uint16_t)ins->envPP[ch->envPPos][0])
ch->envPCnt = ins->envPP[ch->envPPos][0]-1;
}
if (ins->envVTyp & ENV_ENABLED)
{
if (ch->envVCnt >= (uint16_t)ins->envVP[ch->envVPos][0])
ch->envVCnt = ins->envVP[ch->envVPos][0]-1;
}
else
{
ch->realVol = 0;
ch->outVol = 0;
ch->status |= IS_Vol + IS_QuickVol;
}
ch->envSustainActive = false;
}
uint32_t getFrequenceValue(uint16_t period) // 8bb: converts period to 16.16fp resampling delta
{
uint32_t delta;
if (period == 0)
return 0;
if (linearFrqTab)
{
const uint16_t invPeriod = (12 * 192 * 4) - period; // 8bb: this intentionally underflows uint16_t to be accurate to FT2
const uint32_t quotient = invPeriod / 768;
const uint32_t remainder = invPeriod % 768;
const int32_t octShift = 14 - quotient;
delta = (uint32_t)(((int64_t)logTab[remainder] * (int32_t)frequenceMulFactor) >> 24);
delta >>= (octShift & 31); // 8bb: added needed 32-bit bitshift mask
}
else
{
delta = frequenceDivFactor / (uint32_t)period;
}
return delta;
}
static void startTone(uint8_t ton, uint8_t effTyp, uint8_t eff, stmTyp *ch)
{
if (ton == NOTE_KEYOFF)
{
keyOff(ch);
return;
}
// 8bb: if we came from Rxy (retrig), we didn't check note (Ton) yet
if (ton == 0)
{
ton = ch->tonNr;
if (ton == 0)
return; // 8bb: if still no note, return
}
ch->tonNr = ton;
instrTyp *ins = instr[ch->instrNr];
if (ins == NULL)
ins = instr[0];
ch->instrSeg = ins;
ch->mute = ins->mute;
uint8_t smp = ins->ta[ton-1] & 0xF; // 8bb: added for safety
ch->sampleNr = smp;
sampleTyp *s = &ins->samp[smp];
ch->relTonNr = s->relTon;
ton += ch->relTonNr;
if (ton >= 10*12)
return;
ch->oldVol = s->vol;
ch->oldPan = s->pan;
if (effTyp == 0x0E && (eff & 0xF0) == 0x50) // 8bb: EFx - Set Finetune
ch->fineTune = ((eff & 0x0F) << 4) - 128;
else
ch->fineTune = s->fine;
if (ton != 0)
{
const uint16_t tmpTon = ((ton-1) << 4) + (((int8_t)ch->fineTune >> 3) + 16); // 8bb: 0..1935
if (tmpTon < MAX_NOTES) // 8bb: tmpTon is *always* below MAX_NOTES here, this check is not needed
ch->outPeriod = ch->realPeriod = note2Period[tmpTon];
}
ch->status |= IS_Period + IS_Vol + IS_Pan + IS_NyTon + IS_QuickVol;
if (effTyp == 9) // 8bb: 9xx - Set Sample Offset
{
if (eff)
ch->smpOffset = ch->eff;
ch->smpStartPos = ch->smpOffset << 8;
}
else
{
ch->smpStartPos = 0;
}
P_StartTone(s, ch->smpStartPos);
}
static void volume(stmTyp *ch, uint8_t param); // 8bb: volume slide
static void vibrato2(stmTyp *ch);
static void tonePorta(stmTyp *ch, uint8_t param);
static void dummy(stmTyp *ch, uint8_t param)
{
return;
(void)ch;
(void)param;
}
static void finePortaUp(stmTyp *ch, uint8_t param)
{
if (param == 0)
param = ch->fPortaUpSpeed;
ch->fPortaUpSpeed = param;
ch->realPeriod -= param << 2;
if ((int16_t)ch->realPeriod < 1)
ch->realPeriod = 1;
ch->outPeriod = ch->realPeriod;
ch->status |= IS_Period;
}
static void finePortaDown(stmTyp *ch, uint8_t param)
{
if (param == 0)
param = ch->fPortaDownSpeed;
ch->fPortaDownSpeed = param;
ch->realPeriod += param << 2;
if ((int16_t)ch->realPeriod > MAX_FRQ-1) // 8bb: FT2 bug, should've been unsigned comparison!
ch->realPeriod = MAX_FRQ-1;
ch->outPeriod = ch->realPeriod;
ch->status |= IS_Period;
}
static void setGlissCtrl(stmTyp *ch, uint8_t param)
{
ch->glissFunk = param;
}
static void setVibratoCtrl(stmTyp *ch, uint8_t param)
{
ch->waveCtrl = (ch->waveCtrl & 0xF0) | param;
}
static void jumpLoop(stmTyp *ch, uint8_t param)
{
if (param == 0)
{
ch->pattPos = song.pattPos & 0xFF;
}
else if (ch->loopCnt == 0)
{
ch->loopCnt = param;
song.pBreakPos = ch->pattPos;
song.pBreakFlag = true;
}
else if (--ch->loopCnt > 0)
{
song.pBreakPos = ch->pattPos;
song.pBreakFlag = true;
}
}
static void setTremoloCtrl(stmTyp *ch, uint8_t param)
{
ch->waveCtrl = (param << 4) | (ch->waveCtrl & 0x0F);
}
static void volFineUp(stmTyp *ch, uint8_t param)
{
if (param == 0)
param = ch->fVolSlideUpSpeed;
ch->fVolSlideUpSpeed = param;
ch->realVol += param;
if (ch->realVol > 64)
ch->realVol = 64;
ch->outVol = ch->realVol;
ch->status |= IS_Vol;
}
static void volFineDown(stmTyp *ch, uint8_t param)
{
if (param == 0)
param = ch->fVolSlideDownSpeed;
ch->fVolSlideDownSpeed = param;
ch->realVol -= param;
if ((int8_t)ch->realVol < 0)
ch->realVol = 0;
ch->outVol = ch->realVol;
ch->status |= IS_Vol;
}
static void noteCut0(stmTyp *ch, uint8_t param)
{
if (param == 0) // 8bb: only a parameter of zero is handled here
{
ch->realVol = 0;
ch->outVol = 0;
ch->status |= IS_Vol + IS_QuickVol;
}
}
static void pattDelay(stmTyp *ch, uint8_t param)
{
if (song.pattDelTime2 == 0)
song.pattDelTime = param + 1;
(void)ch;
}
static const efxRoutine EJumpTab_TickZero[16] =
{
dummy, // 0
finePortaUp, // 1
finePortaDown, // 2
setGlissCtrl, // 3
setVibratoCtrl, // 4
dummy, // 5
jumpLoop, // 6
setTremoloCtrl, // 7
dummy, // 8
dummy, // 9
volFineUp, // A
volFineDown, // B
noteCut0, // C
dummy, // D
pattDelay, // E
dummy // F
};
static void E_Effects_TickZero(stmTyp *ch, uint8_t param)
{
EJumpTab_TickZero[param >> 4](ch, param & 0x0F);
}
static void posJump(stmTyp *ch, uint8_t param)
{
song.songPos = (int16_t)param - 1;
song.pBreakPos = 0;
song.posJumpFlag = true;
(void)ch;
}
static void pattBreak(stmTyp *ch, uint8_t param)
{
song.posJumpFlag = true;
param = ((param >> 4) * 10) + (param & 0x0F);
if (param <= 63)
song.pBreakPos = param;
else
song.pBreakPos = 0;
(void)ch;
}
static void setSpeed(stmTyp *ch, uint8_t param)
{
if (param >= 32)
{
song.speed = param;
P_SetSpeed(song.speed);
}
else
{
song.timer = song.tempo = param;
}
(void)ch;
}
static void setGlobaVol(stmTyp *ch, uint8_t param)
{
if (param > 64)
param = 64;
song.globVol = param;
stmTyp *c = stm;
for (int32_t i = 0; i < song.antChn; i++, c++) // 8bb: this updates the volume for all voices
c->status |= IS_Vol;
(void)ch;
}
static void setEnvelopePos(stmTyp *ch, uint8_t param)
{
int8_t envPos;
bool envUpdate;
int16_t newEnvPos;
instrTyp *ins = ch->instrSeg;
// *** VOLUME ENVELOPE ***
if (ins->envVTyp & ENV_ENABLED)
{
ch->envVCnt = param - 1;
envPos = 0;
envUpdate = true;
newEnvPos = param;
if (ins->envVPAnt > 1)
{
envPos++;
for (int32_t i = 0; i < ins->envVPAnt-1; i++)
{
if (newEnvPos < ins->envVP[envPos][0])
{
envPos--;
newEnvPos -= ins->envVP[envPos][0];
if (newEnvPos == 0)
{
envUpdate = false;
break;
}
if (ins->envVP[envPos+1][0] <= ins->envVP[envPos][0])
{
envUpdate = true;
break;
}
ch->envVIPValue = ((ins->envVP[envPos+1][1] - ins->envVP[envPos][1]) & 0xFF) << 8;
ch->envVIPValue /= (ins->envVP[envPos+1][0] - ins->envVP[envPos][0]);
ch->envVAmp = (ch->envVIPValue * (newEnvPos - 1)) + ((ins->envVP[envPos][1] & 0xFF) << 8);
envPos++;
envUpdate = false;
break;
}
envPos++;
}
if (envUpdate)
envPos--;
}
if (envUpdate)
{
ch->envVIPValue = 0;
ch->envVAmp = (ins->envVP[envPos][1] & 0xFF) << 8;
}
if (envPos >= ins->envVPAnt)
{
envPos = ins->envVPAnt - 1;
if (envPos < 0)
envPos = 0;
}
ch->envVPos = envPos;
}
// *** PANNING ENVELOPE ***
if (ins->envVTyp & ENV_SUSTAIN) // 8bb: FT2 bug? (should probably have been "ins->envPTyp & ENV_ENABLED")
{
ch->envPCnt = param - 1;
envPos = 0;
envUpdate = true;
newEnvPos = param;
if (ins->envPPAnt > 1)
{
envPos++;
for (int32_t i = 0; i < ins->envPPAnt-1; i++)
{
if (newEnvPos < ins->envPP[envPos][0])
{
envPos--;
newEnvPos -= ins->envPP[envPos][0];
if (newEnvPos == 0)
{
envUpdate = false;
break;
}
if (ins->envPP[envPos + 1][0] <= ins->envPP[envPos][0])
{
envUpdate = true;
break;
}
ch->envPIPValue = ((ins->envPP[envPos+1][1] - ins->envPP[envPos][1]) & 0xFF) << 8;
ch->envPIPValue /= (ins->envPP[envPos+1][0] - ins->envPP[envPos][0]);
ch->envPAmp = (ch->envPIPValue * (newEnvPos - 1)) + ((ins->envPP[envPos][1] & 0xFF) << 8);
envPos++;
envUpdate = false;
break;
}
envPos++;
}
if (envUpdate)
envPos--;
}
if (envUpdate)
{
ch->envPIPValue = 0;
ch->envPAmp = (ins->envPP[envPos][1] & 0xFF) << 8;
}
if (envPos >= ins->envPPAnt)
{
envPos = ins->envPPAnt - 1;
if (envPos < 0)
envPos = 0;
}
ch->envPPos = envPos;
}
}
/* -- tick-zero volume column effects --
** 2nd parameter is used for a volume column quirk with the Rxy command (multiretrig)
*/
static void v_SetVibSpeed(stmTyp *ch, uint8_t *volKol)
{
*volKol = (ch->volKolVol & 0x0F) << 2;
if (*volKol != 0)
ch->vibSpeed = *volKol;
}
static void v_Volume(stmTyp *ch, uint8_t *volKol)
{
*volKol -= 16;
if (*volKol > 64) // 8bb: no idea why FT2 has this check, this can't happen...
*volKol = 64;
ch->outVol = ch->realVol = *volKol;
ch->status |= IS_Vol + IS_QuickVol;
}
static void v_FineSlideDown(stmTyp *ch, uint8_t *volKol)
{
*volKol = (uint8_t)(0 - (ch->volKolVol & 0x0F)) + ch->realVol;
if ((int8_t)*volKol < 0)
*volKol = 0;
ch->outVol = ch->realVol = *volKol;
ch->status |= IS_Vol;
}
static void v_FineSlideUp(stmTyp *ch, uint8_t *volKol)
{
*volKol = (ch->volKolVol & 0x0F) + ch->realVol;
if (*volKol > 64)
*volKol = 64;
ch->outVol = ch->realVol = *volKol;
ch->status |= IS_Vol;
}
static void v_SetPan(stmTyp *ch, uint8_t *volKol)
{
*volKol <<= 4;
ch->outPan = *volKol;
ch->status |= IS_Pan;
}
// -- non-tick-zero volume column effects --
static void v_SlideDown(stmTyp *ch)
{
uint8_t newVol = (uint8_t)(0 - (ch->volKolVol & 0x0F)) + ch->realVol;
if ((int8_t)newVol < 0)
newVol = 0;
ch->outVol = ch->realVol = newVol;
ch->status |= IS_Vol;
}
static void v_SlideUp(stmTyp *ch)
{
uint8_t newVol = (ch->volKolVol & 0x0F) + ch->realVol;
if (newVol > 64)
newVol = 64;
ch->outVol = ch->realVol = newVol;
ch->status |= IS_Vol;
}
static void v_Vibrato(stmTyp *ch)
{
const uint8_t param = ch->volKolVol & 0xF;
if (param > 0)
ch->vibDepth = param;
vibrato2(ch);
}
static void v_PanSlideLeft(stmTyp *ch)
{
uint16_t tmp16 = (uint8_t)(0 - (ch->volKolVol & 0x0F)) + ch->outPan;
if (tmp16 < 256) // 8bb: includes an FT2 bug: pan-slide-left of 0 = set pan to 0
tmp16 = 0;
ch->outPan = (uint8_t)tmp16;
ch->status |= IS_Pan;
}
static void v_PanSlideRight(stmTyp *ch)
{
uint16_t tmp16 = (ch->volKolVol & 0x0F) + ch->outPan;
if (tmp16 > 255)
tmp16 = 255;
ch->outPan = (uint8_t)tmp16;
ch->status |= IS_Pan;
}
static void v_TonePorta(stmTyp *ch)
{
tonePorta(ch, 0); // 8bb: the last parameter is actually not used in tonePorta()
}
static void v_dummy(stmTyp *ch)
{
(void)ch;
return;
}
static void v_dummy2(stmTyp *ch, uint8_t *volKol)
{
(void)ch;
(void)volKol;
return;
}
static const volKolEfxRoutine VJumpTab_TickNonZero[16] =
{
v_dummy, v_dummy, v_dummy, v_dummy,
v_dummy, v_dummy, v_SlideDown, v_SlideUp,
v_dummy, v_dummy, v_dummy, v_Vibrato,
v_dummy, v_PanSlideLeft, v_PanSlideRight, v_TonePorta
};
static const volKolEfxRoutine2 VJumpTab_TickZero[16] =
{
v_dummy2, v_Volume, v_Volume, v_Volume,
v_Volume, v_Volume, v_dummy2, v_dummy2,
v_FineSlideDown, v_FineSlideUp, v_SetVibSpeed, v_dummy2,
v_SetPan, v_dummy2, v_dummy2, v_dummy2
};
static void setPan(stmTyp *ch, uint8_t param)
{
ch->outPan = param;
ch->status |= IS_Pan;
}
static void setVol(stmTyp *ch, uint8_t param)
{
if (param > 64)
param = 64;
ch->outVol = ch->realVol = param;
ch->status |= IS_Vol + IS_QuickVol;
}
static void xFinePorta(stmTyp *ch, uint8_t param)
{
const uint8_t type = param >> 4;
param &= 0x0F;
if (type == 0x1) // extra fine porta up
{
if (param == 0)
param = ch->ePortaUpSpeed;
ch->ePortaUpSpeed = param;
uint16_t newPeriod = ch->realPeriod;
newPeriod -= param;
if ((int16_t)newPeriod < 1)
newPeriod = 1;
ch->outPeriod = ch->realPeriod = newPeriod;
ch->status |= IS_Period;
}
else if (type == 0x2) // extra fine porta down
{
if (param == 0)
param = ch->ePortaDownSpeed;
ch->ePortaDownSpeed = param;
uint16_t newPeriod = ch->realPeriod;
newPeriod += param;
if ((int16_t)newPeriod > MAX_FRQ-1) // 8bb: FT2 bug, should've been unsigned comparison!
newPeriod = MAX_FRQ-1;
ch->outPeriod = ch->realPeriod = newPeriod;
ch->status |= IS_Period;
}
}
static void doMultiRetrig(stmTyp *ch, uint8_t param) // 8bb: "param" is never used (needed for efx jumptable structure)
{
uint8_t cnt = ch->retrigCnt + 1;
if (cnt < ch->retrigSpeed)
{
ch->retrigCnt = cnt;
return;
}
ch->retrigCnt = 0;
int16_t vol = ch->realVol;
switch (ch->retrigVol)
{
case 0x1: vol -= 1; break;
case 0x2: vol -= 2; break;
case 0x3: vol -= 4; break;
case 0x4: vol -= 8; break;
case 0x5: vol -= 16; break;
case 0x6: vol = (vol >> 1) + (vol >> 3) + (vol >> 4); break;
case 0x7: vol >>= 1; break;
case 0x8: break; // 8bb: does not change the volume
case 0x9: vol += 1; break;
case 0xA: vol += 2; break;
case 0xB: vol += 4; break;
case 0xC: vol += 8; break;
case 0xD: vol += 16; break;
case 0xE: vol = (vol >> 1) + vol; break;
case 0xF: vol += vol; break;
default: break;
}
vol = CLAMP(vol, 0, 64);
ch->realVol = (uint8_t)vol;
ch->outVol = ch->realVol;
if (ch->volKolVol >= 0x10 && ch->volKolVol <= 0x50) // 8bb: Set Volume (volume column)
{
ch->outVol = ch->volKolVol - 0x10;
ch->realVol = ch->outVol;
}
else if (ch->volKolVol >= 0xC0 && ch->volKolVol <= 0xCF) // 8bb: Set Panning (volume column)
{
ch->outPan = (ch->volKolVol & 0x0F) << 4;
}
startTone(0, 0, 0, ch);
(void)param;
}
static void multiRetrig(stmTyp *ch, uint8_t param, uint8_t volumeColumnData)
{
uint8_t tmpParam;
tmpParam = param & 0x0F;
if (tmpParam == 0)
tmpParam = ch->retrigSpeed;
ch->retrigSpeed = tmpParam;
tmpParam = param >> 4;
if (tmpParam == 0)
tmpParam = ch->retrigVol;
ch->retrigVol = tmpParam;
if (volumeColumnData == 0)
doMultiRetrig(ch, 0); // 8bb: the second parameter is never used (needed for efx jumptable structure)
}
static const efxRoutine JumpTab_TickZero[36] =
{
dummy, // 0
dummy, // 1
dummy, // 2
dummy, // 3
dummy, // 4
dummy, // 5
dummy, // 6
dummy, // 7
setPan, // 8
dummy, // 9
dummy, // A
posJump, // B
setVol, // C
pattBreak, // D
E_Effects_TickZero, // E
setSpeed, // F
setGlobaVol, // G
dummy, // H
dummy, // I
dummy, // J
dummy, // K
setEnvelopePos, // L
dummy, // M
dummy, // N
dummy, // O
dummy, // P
dummy, // Q
dummy, // R
dummy, // S
dummy, // T
dummy, // U
dummy, // V
dummy, // W
xFinePorta, // X
dummy, // Y
dummy // Z
};
static void checkEffects(stmTyp *ch) // tick0 effect handling
{
// volume column effects
uint8_t newVolKol = ch->volKolVol; // 8bb: manipulated by vol. column effects, then used for multiretrig check (FT2 quirk)
VJumpTab_TickZero[ch->volKolVol >> 4](ch, &newVolKol);
// normal effects
const uint8_t param = ch->eff;
if ((ch->effTyp == 0 && param == 0) || ch->effTyp > 35)
return;
// 8bb: this one has to be done here instead of in the jumptable, as it needs the "newVolKol" parameter (FT2 quirk)
if (ch->effTyp == 27) // 8bb: Rxy - Multi Retrig
{
multiRetrig(ch, param, newVolKol);
return;
}
JumpTab_TickZero[ch->effTyp](ch, ch->eff);
}
static void fixTonePorta(stmTyp *ch, const tonTyp *p, uint8_t inst)
{
if (p->ton > 0)
{
if (p->ton == NOTE_KEYOFF)
{
keyOff(ch);
}
else
{
const uint16_t portaTmp = (((p->ton-1) + ch->relTonNr) << 4) + (((int8_t)ch->fineTune >> 3) + 16);
if (portaTmp < MAX_NOTES)
{
ch->wantPeriod = note2Period[portaTmp];
if (ch->wantPeriod == ch->realPeriod)
ch->portaDir = 0;
else if (ch->wantPeriod > ch->realPeriod)
ch->portaDir = 1;
else
ch->portaDir = 2;
}
}
}
if (inst > 0)
{
retrigVolume(ch);
if (p->ton != NOTE_KEYOFF)
retrigEnvelopeVibrato(ch);
}
}
static void getNewNote(stmTyp *ch, const tonTyp *p)
{
ch->volKolVol = p->vol;
if (ch->effTyp == 0)
{
if (ch->eff != 0) // 8bb: we have an arpeggio (0xy) running, set period back
{
ch->outPeriod = ch->realPeriod;
ch->status |= IS_Period;
}
}
else
{
// 8bb: if we have a vibrato (4xy/6xy) on previous row (ch) that ends at current row (p), set period back
if ((ch->effTyp == 4 || ch->effTyp == 6) && (p->effTyp != 4 && p->effTyp != 6))
{
ch->outPeriod = ch->realPeriod;
ch->status |= IS_Period;
}
}
ch->effTyp = p->effTyp;
ch->eff = p->eff;
ch->tonTyp = (p->instr << 8) | p->ton;
// 8bb: 'inst' var is used for later if-checks
uint8_t inst = p->instr;
if (inst > 0)
{
if (inst <= 128)
ch->instrNr = inst;
else
inst = 0;
}
bool checkEfx = true;
if (p->effTyp == 0x0E) // 8bb: check for EDx (Note Delay) and E90 (Retrigger Note)
{
if (p->eff >= 0xD1 && p->eff <= 0xDF) // 8bb: ED1..EDF (Note Delay)
return;
else if (p->eff == 0x90) // 8bb: E90 (Retrigger Note)
checkEfx = false;
}
if (checkEfx)
{
if ((ch->volKolVol & 0xF0) == 0xF0) // 8bb: Portamento (volume column)
{
const uint8_t volKolParam = ch->volKolVol & 0x0F;
if (volKolParam > 0)
ch->portaSpeed = volKolParam << 6;
fixTonePorta(ch, p, inst);
checkEffects(ch);
return;
}
if (p->effTyp == 3 || p->effTyp == 5) // 8bb: Portamento (3xx/5xx)
{
if (p->effTyp != 5 && p->eff != 0)
ch->portaSpeed = p->eff << 2;
fixTonePorta(ch, p, inst);
checkEffects(ch);
return;
}
if (p->effTyp == 0x14 && p->eff == 0) // 8bb: K00 (Key Off - only handle tick 0 here)
{
keyOff(ch);
if (inst)
retrigVolume(ch);
checkEffects(ch);
return;
}
if (p->ton == 0)
{
if (inst > 0)
{
retrigVolume(ch);
retrigEnvelopeVibrato(ch);
}
checkEffects(ch);
return;
}