ref: 871c59c2513acc611f3b1f4242453fc3bd1f6460
dir: /src/pt2_replayer.c/
// C port of ProTracker 2.3D's replayer (with some modifications, but still accurate)
// for finding memory leaks in debug mode with Visual Studio
#if defined _DEBUG && defined _MSC_VER
#include <crtdbg.h>
#endif
#include <stdint.h>
#include <stdbool.h>
#include "pt2_audio.h"
#include "pt2_helpers.h"
#include "pt2_tables.h"
#include "pt2_config.h"
#include "pt2_visuals.h"
#include "pt2_scopes.h"
#include "pt2_paula.h"
#include "pt2_visuals_sync.h"
static bool posJumpAssert, pBreakFlag, modRenderDone;
static bool doStopSong; // from F00 (Set Speed)
static int8_t pBreakPosition, oldRow, modPattern;
static uint8_t pattDelTime, lowMask = 0xFF, pattDelTime2;
static int16_t modOrder, oldPattern, oldOrder;
static uint16_t DMACONtemp;
static int32_t modBPM, oldBPM, oldSpeed, ciaSetBPM;
static const uint8_t funkTable[16] = // EFx (FunkRepeat/InvertLoop)
{
0x00, 0x05, 0x06, 0x07, 0x08, 0x0A, 0x0B, 0x0D,
0x10, 0x13, 0x16, 0x1A, 0x20, 0x2B, 0x40, 0x80
};
double ciaBpm2Hz(int32_t bpm)
{
if (bpm == 0)
return 0.0;
const uint32_t ciaPeriod = 1773447 / bpm; // yes, PT truncates here
return (double)CIA_PAL_CLK / (ciaPeriod+1); // +1, CIA triggers on underflow
}
void updatePaulaLoops(void) // used after manipulating sample loop points while Paula is live
{
const bool audioWasntLocked = !audio.locked;
if (audioWasntLocked)
lockAudio();
for (int32_t i = 0; i < PAULA_VOICES; i++)
{
const moduleChannel_t *ch = &song->channels[i];
if (ch->n_samplenum == editor.currSample) // selected sample matches channel's sample?
{
const moduleSample_t *s = &song->samples[editor.currSample];
const uint32_t voiceAddr = 0xDFF0A0 + (i * 16);
paulaWritePtr(voiceAddr + 0, ch->n_start + s->loopStart);
paulaWriteWord(voiceAddr + 4, (uint16_t)(s->loopLength >> 1));
setVisualsDataPtr(i, ch->n_start + s->loopStart);
setVisualsLength(i, (uint16_t)(s->loopLength >> 1));
}
}
if (audioWasntLocked)
unlockAudio();
}
void turnOffVoices(void)
{
const bool audioWasntLocked = !audio.locked;
if (audioWasntLocked)
lockAudio();
paulaWriteWord(0xDFF096, 0x000F); // turn off all voice DMAs
setVisualsDMACON(0x000F);
// clear all volumes
for (int32_t i = 0; i < PAULA_VOICES; i++)
{
const uint32_t voiceAddr = 0xDFF0A0 + (i * 16);
paulaWriteWord(voiceAddr + 8, 0);
setVisualsVolume(i, 0);
}
// reset dithering/filter states (so that every playback session is identical)
resetAudioDithering();
if (audioWasntLocked)
unlockAudio();
editor.tuningToneFlag = false;
}
void initializeModuleChannels(module_t *s)
{
assert(s != NULL);
memset(s->channels, 0, sizeof (s->channels));
moduleChannel_t *ch = s->channels;
for (uint8_t i = 0; i < PAULA_VOICES; i++, ch++)
{
ch->n_chanindex = i;
ch->n_dmabit = 1 << i;
}
}
void setReplayerPosToTrackerPos(void)
{
if (song == NULL)
return;
modPattern = (int8_t)song->currPattern;
modOrder = song->currOrder;
song->row = song->currRow;
song->tick = 0;
}
int8_t *allocMemForAllSamples(void)
{
// allocate memory for all sample data blocks (+ 2 extra, for quirk + safety)
const size_t allocLen = (MOD_SAMPLES + 2) * config.maxSampleLength;
return (int8_t *)calloc(allocLen, 1);
}
void modSetSpeed(int32_t speed)
{
song->currSpeed = song->speed = speed;
song->tick = 0;
}
void doStopIt(bool resetPlayMode)
{
editor.songPlaying = false;
pattDelTime = pattDelTime2 = 0;
if (resetPlayMode)
{
editor.playMode = PLAY_MODE_NORMAL;
editor.currMode = MODE_IDLE;
pointerSetModeThreadSafe(POINTER_MODE_IDLE, true);
}
if (song != NULL)
{
moduleChannel_t *ch = song->channels;
for (int32_t i = 0; i < PAULA_VOICES; i++, ch++)
{
ch->n_wavecontrol = 0;
ch->n_glissfunk = 0;
ch->n_finetune = 0;
ch->n_loopcount = 0;
}
}
doStopSong = false; // just in case this flag was stuck from command F00 (stop song)
}
void setPattern(int16_t pattern)
{
if (pattern > MAX_PATTERNS-1)
pattern = MAX_PATTERNS-1;
song->currPattern = modPattern = (int8_t)pattern;
}
void storeTempVariables(void) // this one is accessed in other files, so non-static
{
oldBPM = song->currBPM;
oldRow = song->currRow;
oldOrder = song->currOrder;
oldSpeed = song->currSpeed;
oldPattern = song->currPattern;
}
static void setVUMeterHeight(moduleChannel_t *ch)
{
if (editor.muted[ch->n_chanindex])
return;
uint8_t vol = ch->n_volume;
if ((ch->n_cmd & 0xF00) == 0xC00) // handle Cxx effect
vol = ch->n_cmd & 0xFF;
if (vol > 64)
vol = 64;
if (!editor.songPlaying)
{
editor.vuMeterVolumes[ch->n_chanindex] = vuMeterHeights[vol];
}
else
{
ch->syncVuVolume = vol;
ch->syncFlags |= UPDATE_VUMETER;
}
}
static void updateFunk(moduleChannel_t *ch)
{
const int8_t funkSpeed = ch->n_glissfunk >> 4;
if (funkSpeed == 0)
return;
ch->n_funkoffset += funkTable[funkSpeed];
if (ch->n_funkoffset >= 128)
{
ch->n_funkoffset = 0;
if (ch->n_loopstart != NULL && ch->n_wavestart != NULL) // ProTracker bugfix
{
if (++ch->n_wavestart >= ch->n_loopstart + (ch->n_replen << 1))
ch->n_wavestart = ch->n_loopstart;
*ch->n_wavestart = -1 - *ch->n_wavestart;
}
}
}
static void setGlissControl(moduleChannel_t *ch)
{
ch->n_glissfunk = (ch->n_glissfunk & 0xF0) | (ch->n_cmd & 0x0F);
}
static void setVibratoControl(moduleChannel_t *ch)
{
ch->n_wavecontrol = (ch->n_wavecontrol & 0xF0) | (ch->n_cmd & 0x0F);
}
static void setFineTune(moduleChannel_t *ch)
{
ch->n_finetune = ch->n_cmd & 0xF;
}
static void jumpLoop(moduleChannel_t *ch)
{
if (song->tick != 0)
return;
if ((ch->n_cmd & 0xF) == 0)
{
ch->n_pattpos = song->row;
}
else
{
if (ch->n_loopcount == 0)
ch->n_loopcount = ch->n_cmd & 0xF;
else if (--ch->n_loopcount == 0)
return;
pBreakPosition = ch->n_pattpos;
pBreakFlag = true;
// stuff used for MOD2WAV to determine if the song has reached its end
if (editor.mod2WavOngoing)
{
for (int32_t tempParam = pBreakPosition; tempParam <= song->row; tempParam++)
editor.rowVisitTable[(modOrder * MOD_ROWS) + tempParam] = false;
}
}
}
static void setTremoloControl(moduleChannel_t *ch)
{
ch->n_wavecontrol = ((ch->n_cmd & 0xF) << 4) | (ch->n_wavecontrol & 0xF);
}
/* This is a little used effect, despite being present in original ProTracker.
** E8x was sometimes entirely replaced with code used for demo fx syncing in
** demo mod players, so it can be turned off by looking at DISABLE_E8X in
** protracker.ini if you so desire.
*/
static void karplusStrong(moduleChannel_t *ch)
{
int8_t a, b;
if (config.disableE8xEffect)
return;
if (ch->n_loopstart == NULL)
return; // ProTracker bugfix
int8_t *ptr8 = ch->n_loopstart;
int16_t end = ((ch->n_replen * 2) & 0xFFFF) - 2;
do
{
a = ptr8[0];
b = ptr8[1];
*ptr8++ = (a + b) >> 1;
}
while (--end >= 0);
a = ptr8[0];
b = ch->n_loopstart[0];
*ptr8 = (a + b) >> 1;
}
static void doRetrg(moduleChannel_t *ch)
{
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(0xDFF096, ch->n_dmabit); // voice DMA off
paulaWritePtr(voiceAddr + 0, ch->n_start); // n_start is increased on 9xx
paulaWriteWord(voiceAddr + 4, ch->n_length);
paulaWriteWord(voiceAddr + 6, ch->n_period);
paulaWriteWord(0xDFF096, 0x8000 | ch->n_dmabit); // voice DMA on
// these take effect after the current DMA cycle is done
paulaWritePtr(voiceAddr + 0, ch->n_loopstart);
paulaWriteWord(voiceAddr + 4, ch->n_replen);
// update tracker visuals
setVisualsDMACON(ch->n_dmabit);
setVisualsDataPtr(ch->n_chanindex, ch->n_start);
setVisualsLength(ch->n_chanindex, ch->n_length);
setVisualsPeriod(ch->n_chanindex, ch->n_period);
setVisualsDMACON(0x8000 | ch->n_dmabit);
setVisualsDataPtr(ch->n_chanindex, ch->n_loopstart);
setVisualsLength(ch->n_chanindex, ch->n_replen);
ch->syncAnalyzerVolume = ch->n_volume;
ch->syncAnalyzerPeriod = ch->n_period;
ch->syncFlags |= UPDATE_ANALYZER;
setVUMeterHeight(ch);
}
static void retrigNote(moduleChannel_t *ch)
{
if ((ch->n_cmd & 0xF) > 0)
{
if (song->tick == 0 && (ch->n_note & 0xFFF) > 0)
return;
if (song->tick % (ch->n_cmd & 0xF) == 0)
doRetrg(ch);
}
}
static void volumeSlide(moduleChannel_t *ch)
{
uint8_t param = ch->n_cmd & 0xFF;
if ((param & 0xF0) == 0)
{
ch->n_volume -= param & 0x0F;
if (ch->n_volume < 0)
ch->n_volume = 0;
}
else
{
ch->n_volume += param >> 4;
if (ch->n_volume > 64)
ch->n_volume = 64;
}
}
static void volumeFineUp(moduleChannel_t *ch)
{
if (song->tick == 0)
{
ch->n_volume += ch->n_cmd & 0xF;
if (ch->n_volume > 64)
ch->n_volume = 64;
}
}
static void volumeFineDown(moduleChannel_t *ch)
{
if (song->tick == 0)
{
ch->n_volume -= ch->n_cmd & 0xF;
if (ch->n_volume < 0)
ch->n_volume = 0;
}
}
static void noteCut(moduleChannel_t *ch)
{
if (song->tick == (ch->n_cmd & 0xF))
ch->n_volume = 0;
}
static void noteDelay(moduleChannel_t *ch)
{
if (song->tick == (ch->n_cmd & 0xF) && (ch->n_note & 0xFFF) > 0)
doRetrg(ch);
}
static void patternDelay(moduleChannel_t *ch)
{
if (song->tick == 0 && pattDelTime2 == 0)
pattDelTime = (ch->n_cmd & 0xF) + 1;
}
static void funkIt(moduleChannel_t *ch)
{
if (song->tick == 0)
{
ch->n_glissfunk = ((ch->n_cmd & 0xF) << 4) | (ch->n_glissfunk & 0xF);
if ((ch->n_glissfunk & 0xF0) > 0)
updateFunk(ch);
}
}
static void positionJump(moduleChannel_t *ch)
{
// original PT doesn't do this check, but we have to
if (editor.playMode != PLAY_MODE_PATTERN || (editor.currMode == MODE_RECORD && editor.recordMode != RECORD_PATT))
modOrder = (ch->n_cmd & 0xFF) - 1; // B00 results in -1, but it safely jumps to order 0
pBreakPosition = 0;
posJumpAssert = true;
}
static void volumeChange(moduleChannel_t *ch)
{
ch->n_volume = ch->n_cmd & 0xFF;
if ((uint8_t)ch->n_volume > 64)
ch->n_volume = 64;
}
static void patternBreak(moduleChannel_t *ch)
{
pBreakPosition = (((ch->n_cmd & 0xF0) >> 4) * 10) + (ch->n_cmd & 0x0F);
if ((uint8_t)pBreakPosition > 63)
pBreakPosition = 0;
posJumpAssert = true;
}
static void setSpeed(moduleChannel_t *ch)
{
if ((ch->n_cmd & 0xFF) > 0)
{
if (editor.timingMode == TEMPO_MODE_VBLANK || (ch->n_cmd & 0xFF) < 32)
modSetSpeed(ch->n_cmd & 0xFF);
else
ciaSetBPM = ch->n_cmd & 0xFF; // the CIA chip doesn't use its new timer value until the next interrupt, so change it later
}
else
{
// F00 - stop song
doStopSong = true;
}
}
static void arpeggio(moduleChannel_t *ch)
{
int32_t arpNote;
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
int32_t arpTick = song->tick % 3; // 0, 1, 2
if (arpTick == 1)
{
arpNote = ch->n_cmd >> 4;
}
else if (arpTick == 2)
{
arpNote = ch->n_cmd & 0xF;
}
else // arpTick 0
{
paulaWriteWord(voiceAddr + 6, ch->n_period);
setVisualsPeriod(ch->n_chanindex, ch->n_period);
return;
}
/* 8bitbubsy: If the finetune is -1, this can overflow up to
** 15 words outside of the table. The table is padded with
** the correct overflow values to allow this to safely happen
** and sound correct at the same time.
*/
const int16_t *periods = &periodTable[ch->n_finetune * 37];
for (int32_t baseNote = 0; baseNote < 37; baseNote++)
{
if (ch->n_period >= periods[baseNote])
{
paulaWriteWord(voiceAddr + 6, periods[baseNote+arpNote]);
setVisualsPeriod(ch->n_chanindex, periods[baseNote+arpNote]);
break;
}
}
}
static void portaUp(moduleChannel_t *ch)
{
ch->n_period -= (ch->n_cmd & 0xFF) & lowMask;
lowMask = 0xFF;
if ((ch->n_period & 0xFFF) < 113) // PT BUG: sign removed before comparison, underflow not clamped!
ch->n_period = (ch->n_period & 0xF000) | 113;
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 6, ch->n_period & 0xFFF);
setVisualsPeriod(ch->n_chanindex, ch->n_period & 0xFFF);
}
static void portaDown(moduleChannel_t *ch)
{
ch->n_period += (ch->n_cmd & 0xFF) & lowMask;
lowMask = 0xFF;
if ((ch->n_period & 0xFFF) > 856)
ch->n_period = (ch->n_period & 0xF000) | 856;
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 6, ch->n_period & 0xFFF);
setVisualsPeriod(ch->n_chanindex, ch->n_period & 0xFFF);
}
static void filterOnOff(moduleChannel_t *ch)
{
if (song->tick == 0) // added this (just pointless to call this during all ticks!)
{
const bool filterOn = (ch->n_cmd & 1) ^ 1;
paulaWriteByte(0xBFE001, filterOn << 1);
audio.ledFilterEnabled = filterOn;
}
}
static void finePortaUp(moduleChannel_t *ch)
{
if (song->tick == 0)
{
lowMask = 0xF;
portaUp(ch);
}
}
static void finePortaDown(moduleChannel_t *ch)
{
if (song->tick == 0)
{
lowMask = 0xF;
portaDown(ch);
}
}
static void setTonePorta(moduleChannel_t *ch)
{
uint16_t note = ch->n_note & 0xFFF;
const int16_t *portaPointer = &periodTable[ch->n_finetune * 37];
int32_t i = 0;
while (true)
{
// portaPointer[36] = 0, so i=36 is safe
if (note >= portaPointer[i])
break;
if (++i >= 37)
{
i = 35;
break;
}
}
if ((ch->n_finetune & 8) && i > 0)
i--;
ch->n_wantedperiod = portaPointer[i];
ch->n_toneportdirec = 0;
if (ch->n_period == ch->n_wantedperiod) ch->n_wantedperiod = 0;
else if (ch->n_period > ch->n_wantedperiod) ch->n_toneportdirec = 1;
}
static void tonePortNoChange(moduleChannel_t *ch)
{
if (ch->n_wantedperiod <= 0)
return;
if (ch->n_toneportdirec > 0)
{
ch->n_period -= ch->n_toneportspeed;
if (ch->n_period <= ch->n_wantedperiod)
{
ch->n_period = ch->n_wantedperiod;
ch->n_wantedperiod = 0;
}
}
else
{
ch->n_period += ch->n_toneportspeed;
if (ch->n_period >= ch->n_wantedperiod)
{
ch->n_period = ch->n_wantedperiod;
ch->n_wantedperiod = 0;
}
}
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
if ((ch->n_glissfunk & 0xF) == 0)
{
paulaWriteWord(voiceAddr + 6, ch->n_period);
setVisualsPeriod(ch->n_chanindex, ch->n_period);
}
else
{
const int16_t *portaPointer = &periodTable[ch->n_finetune * 37];
int32_t i = 0;
while (true)
{
// portaPointer[36] = 0, so i=36 is safe
if (ch->n_period >= portaPointer[i])
break;
if (++i >= 37)
{
i = 35;
break;
}
}
paulaWriteWord(voiceAddr + 6, portaPointer[i]);
setVisualsPeriod(ch->n_chanindex, portaPointer[i]);
}
}
static void tonePortamento(moduleChannel_t *ch)
{
if ((ch->n_cmd & 0xFF) > 0)
{
ch->n_toneportspeed = ch->n_cmd & 0xFF;
ch->n_cmd &= 0xFF00;
}
tonePortNoChange(ch);
}
static void vibrato2(moduleChannel_t *ch)
{
uint16_t vibratoData;
const uint8_t vibratoPos = (ch->n_vibratopos >> 2) & 0x1F;
const uint8_t vibratoType = ch->n_wavecontrol & 3;
if (vibratoType == 0) // sine
{
vibratoData = vibratoTable[vibratoPos];
}
else if (vibratoType == 1) // ramp
{
if (ch->n_vibratopos < 128)
vibratoData = vibratoPos << 3;
else
vibratoData = 255 - (vibratoPos << 3);
}
else // square
{
vibratoData = 255;
}
vibratoData = (vibratoData * (ch->n_vibratocmd & 0xF)) >> 7;
if (ch->n_vibratopos < 128)
vibratoData = ch->n_period + vibratoData;
else
vibratoData = ch->n_period - vibratoData;
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 6, vibratoData); // period
setVisualsPeriod(ch->n_chanindex, vibratoData);
ch->n_vibratopos += (ch->n_vibratocmd >> 2) & 0x3C;
}
static void vibrato(moduleChannel_t *ch)
{
if ((ch->n_cmd & 0x0F) > 0)
ch->n_vibratocmd = (ch->n_vibratocmd & 0xF0) | (ch->n_cmd & 0x0F);
if ((ch->n_cmd & 0xF0) > 0)
ch->n_vibratocmd = (ch->n_cmd & 0xF0) | (ch->n_vibratocmd & 0x0F);
vibrato2(ch);
}
static void tonePlusVolSlide(moduleChannel_t *ch)
{
tonePortNoChange(ch);
volumeSlide(ch);
}
static void vibratoPlusVolSlide(moduleChannel_t *ch)
{
vibrato2(ch);
volumeSlide(ch);
}
static void tremolo(moduleChannel_t *ch)
{
int16_t tremoloData;
if ((ch->n_cmd & 0x0F) > 0)
ch->n_tremolocmd = (ch->n_tremolocmd & 0xF0) | (ch->n_cmd & 0x0F);
if ((ch->n_cmd & 0xF0) > 0)
ch->n_tremolocmd = (ch->n_cmd & 0xF0) | (ch->n_tremolocmd & 0x0F);
const uint8_t tremoloPos = (ch->n_tremolopos >> 2) & 0x1F;
const uint8_t tremoloType = (ch->n_wavecontrol >> 4) & 3;
if (tremoloType == 0) // sine
{
tremoloData = vibratoTable[tremoloPos];
}
else if (tremoloType == 1) // ramp
{
if (ch->n_vibratopos < 128) // PT bug, should've been ch->n_tremolopos
tremoloData = tremoloPos << 3;
else
tremoloData = 255 - (tremoloPos << 3);
}
else // square
{
tremoloData = 255;
}
tremoloData = ((uint16_t)tremoloData * (ch->n_tremolocmd & 0xF)) >> 6;
if (ch->n_tremolopos < 128)
{
tremoloData = ch->n_volume + tremoloData;
if (tremoloData > 64)
tremoloData = 64;
}
else
{
tremoloData = ch->n_volume - tremoloData;
if (tremoloData < 0)
tremoloData = 0;
}
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 8, tremoloData); // volume
setVisualsVolume(ch->n_chanindex, tremoloData);
ch->n_tremolopos += (ch->n_tremolocmd >> 2) & 0x3C;
}
static void sampleOffset(moduleChannel_t *ch)
{
if ((ch->n_cmd & 0xFF) > 0)
ch->n_sampleoffset = ch->n_cmd & 0xFF;
uint16_t newOffset = ch->n_sampleoffset << 7;
// this signed test is the reason for the 9xx "sample >64kB = silence" bug
if ((int16_t)newOffset < (int16_t)ch->n_length)
{
ch->n_length -= newOffset;
ch->n_start += newOffset << 1;
}
else
{
ch->n_length = 1;
}
}
static void E_Commands(moduleChannel_t *ch)
{
const uint8_t ecmd = (ch->n_cmd & 0x00F0) >> 4;
switch (ecmd)
{
case 0x0: filterOnOff(ch); return;
case 0x1: finePortaUp(ch); return;
case 0x2: finePortaDown(ch); return;
case 0x3: setGlissControl(ch); return;
case 0x4: setVibratoControl(ch); return;
case 0x5: setFineTune(ch); return;
case 0x6: jumpLoop(ch); return;
case 0x7: setTremoloControl(ch); return;
case 0x8: karplusStrong(ch); return;
case 0xE: patternDelay(ch); return;
default: break;
}
if (editor.muted[ch->n_chanindex])
return;
switch (ecmd)
{
case 0x9: retrigNote(ch); return;
case 0xA: volumeFineUp(ch); return;
case 0xB: volumeFineDown(ch); return;
case 0xC: noteCut(ch); return;
case 0xD: noteDelay(ch); return;
case 0xF: funkIt(ch); return;
default: break;
}
}
static void checkMoreEffects(moduleChannel_t *ch)
{
const uint8_t cmd = (ch->n_cmd & 0x0F00) >> 8;
switch (cmd)
{
case 0x9: sampleOffset(ch); return; // note the returns here, not breaks!
case 0xB: positionJump(ch); return;
case 0xD: patternBreak(ch); return;
case 0xE: E_Commands(ch); return;
case 0xF: setSpeed(ch); return;
default: break;
}
if (editor.muted[ch->n_chanindex])
return;
if (cmd == 0xC)
{
volumeChange(ch);
return;
}
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 6, ch->n_period);
setVisualsPeriod(ch->n_chanindex, ch->n_period);
}
static void chkefx2(moduleChannel_t *ch)
{
updateFunk(ch);
if ((ch->n_cmd & 0xFFF) == 0)
return;
const uint8_t cmd = (ch->n_cmd & 0x0F00) >> 8;
switch (cmd)
{
case 0x0: arpeggio(ch); return; // note the returns here, not breaks!
case 0x1: portaUp(ch); return;
case 0x2: portaDown(ch); return;
case 0x3: tonePortamento(ch); return;
case 0x4: vibrato(ch); return;
case 0x5: tonePlusVolSlide(ch); return;
case 0x6: vibratoPlusVolSlide(ch); return;
case 0xE: E_Commands(ch); return;
default: break;
}
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 6, ch->n_period);
setVisualsPeriod(ch->n_chanindex, ch->n_period);
if (cmd == 0x7)
tremolo(ch);
else if (cmd == 0xA)
volumeSlide(ch);
}
static void checkEffects(moduleChannel_t *ch)
{
if (editor.muted[ch->n_chanindex])
return;
chkefx2(ch);
/* This is not very clear in the original PT replayer code,
** but the tremolo effect skips chkefx2()'s return address
** in the stack so that it jumps to checkEffects()'s return
** address instead of ending up here. In other words, volume
** is not updated here after tremolo (it's done inside the
** tremolo routine itself).
*/
const uint8_t cmd = (ch->n_cmd & 0x0F00) >> 8;
if (cmd != 0x7)
{
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 8, ch->n_volume);
setVisualsVolume(ch->n_chanindex, ch->n_volume);
}
}
static void setPeriod(moduleChannel_t *ch)
{
int32_t i;
uint16_t note = ch->n_note & 0xFFF;
for (i = 0; i < 37; i++)
{
// periodTable[36] = 0, so i=36 is safe
if (note >= periodTable[i])
break;
}
// yes it's safe if i=37 because of zero-padding
ch->n_period = periodTable[(ch->n_finetune * 37) + i];
if ((ch->n_cmd & 0xFF0) != 0xED0) // no note delay
{
paulaWriteWord(0xDFF096, ch->n_dmabit); // voice DMA off (turned on in setDMA() later)
if ((ch->n_wavecontrol & 0x04) == 0) ch->n_vibratopos = 0;
if ((ch->n_wavecontrol & 0x40) == 0) ch->n_tremolopos = 0;
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 4, ch->n_length);
paulaWritePtr(voiceAddr + 0, ch->n_start);
if (ch->n_start == NULL)
{
ch->n_loopstart = NULL;
paulaWriteWord(voiceAddr + 4, 1); // length
ch->n_replen = 1;
}
paulaWriteWord(voiceAddr + 6, ch->n_period);
DMACONtemp |= ch->n_dmabit;
// update tracker visuals
setVisualsDMACON(ch->n_dmabit);
setVisualsLength(ch->n_chanindex, ch->n_length);
setVisualsDataPtr(ch->n_chanindex, ch->n_start);
if (ch->n_start == NULL)
setVisualsLength(ch->n_chanindex, 1);
setVisualsPeriod(ch->n_chanindex, ch->n_period);
}
checkMoreEffects(ch);
}
static void checkMetronome(moduleChannel_t *ch, note_t *note)
{
if (editor.metroFlag && editor.metroChannel > 0)
{
if (ch->n_chanindex == (uint32_t)editor.metroChannel-1 && (song->row % editor.metroSpeed) == 0)
{
note->sample = 31;
note->period = (((song->row / editor.metroSpeed) % editor.metroSpeed) == 0) ? 160 : 214;
}
}
}
static void playVoice(moduleChannel_t *ch)
{
if (ch->n_note == 0 && ch->n_cmd == 0) // test period, command and command parameter
{
const uint32_t voiceAddr = 0xDFF0A0 + (ch->n_chanindex * 16);
paulaWriteWord(voiceAddr + 6, ch->n_period);
setVisualsPeriod(ch->n_chanindex, ch->n_period);
}
note_t note = song->patterns[modPattern][(song->row * PAULA_VOICES) + ch->n_chanindex];
checkMetronome(ch, ¬e);
ch->n_note = note.period;
ch->n_cmd = (note.command << 8) | note.param;
if (note.sample >= 1 && note.sample <= 31) // SAFETY BUG FIX: don't handle sample-numbers >31
{
ch->n_samplenum = note.sample - 1;
moduleSample_t *s = &song->samples[ch->n_samplenum];
ch->n_start = &song->sampleData[s->offset];
ch->n_finetune = s->fineTune & 0xF;
ch->n_volume = s->volume;
ch->n_length = (uint16_t)(s->length >> 1);
ch->n_replen = (uint16_t)(s->loopLength >> 1);
const uint16_t repeat = (uint16_t)(s->loopStart >> 1);
if (repeat > 0)
{
ch->n_loopstart = ch->n_start + (repeat << 1);
ch->n_wavestart = ch->n_loopstart;
ch->n_length = repeat + ch->n_replen;
}
else
{
ch->n_loopstart = ch->n_start;
ch->n_wavestart = ch->n_start;
}
// non-PT2 requirement (set safe sample space for uninitialized voices - f.ex. "the ultimate beeper.mod")
if (ch->n_length == 0)
ch->n_loopstart = ch->n_wavestart = paulaGetNullSamplePtr();
}
if ((ch->n_note & 0xFFF) > 0)
{
if ((ch->n_cmd & 0xFF0) == 0xE50) // set finetune
{
setFineTune(ch);
setPeriod(ch);
}
else
{
uint8_t cmd = (ch->n_cmd & 0x0F00) >> 8;
if (cmd == 3 || cmd == 5)
{
setVUMeterHeight(ch);
setTonePorta(ch);
checkMoreEffects(ch);
}
else if (cmd == 9)
{
checkMoreEffects(ch);
setPeriod(ch);
}
else
{
setPeriod(ch);
}
}
}
else
{
checkMoreEffects(ch);
}
}
static void updateUIPositions(void)
{
if (editor.mod2WavOngoing || editor.pat2SmpOngoing)
return; // don't update UI under MOD2WAV/PAT2SMP rendering
song->currRow = song->row;
song->currOrder = modOrder;
song->currPattern = modPattern;
uint16_t *currPatPtr = &song->header.order[modOrder];
editor.currPatternDisp = currPatPtr;
editor.currPosEdPattDisp = currPatPtr;
editor.currPatternDisp = currPatPtr;
editor.currPosEdPattDisp = currPatPtr;
ui.updateSongPos = true;
ui.updateSongPattern = true;
ui.updateCurrPattText = true;
ui.updatePatternData = true;
if (ui.posEdScreenShown)
ui.updatePosEd = true;
}
static void nextPosition(void)
{
if (editor.pat2SmpOngoing)
modRenderDone = true;
song->row = pBreakPosition;
pBreakPosition = 0;
posJumpAssert = false;
if (editor.playMode != PLAY_MODE_PATTERN ||
(editor.currMode == MODE_RECORD && editor.recordMode != RECORD_PATT))
{
if (editor.stepPlayEnabled)
{
if (config.keepEditModeAfterStepPlay && editor.stepPlayLastMode == MODE_EDIT)
{
doStopIt(false);
editor.playMode = PLAY_MODE_NORMAL;
editor.currMode = MODE_EDIT;
pointerSetModeThreadSafe(POINTER_MODE_EDIT, true);
}
else
{
doStopIt(true);
}
editor.stepPlayEnabled = false;
editor.stepPlayBackwards = false;
if (editor.stepPlayLastMode == MODE_EDIT || editor.stepPlayLastMode == MODE_IDLE)
{
song->row &= 63;
song->currRow = song->row;
}
else
{
// if we were playing, set replayer row to tracker row (stay in sync)
song->currRow &= 63;
song->row = song->currRow;
}
return;
}
modOrder = (modOrder + 1) & 127;
if (modOrder >= song->header.numOrders)
{
modOrder = 0;
if (config.compoMode) // stop song for music competitions playing
{
doStopIt(true);
turnOffVoices();
modOrder = 0;
modPattern = (int8_t)song->header.order[modOrder];
song->row = 0;
updateUIPositions();
}
if (editor.mod2WavOngoing)
modRenderDone = true;
}
modPattern = (int8_t)song->header.order[modOrder];
if (modPattern > MAX_PATTERNS-1)
modPattern = MAX_PATTERNS-1;
}
}
static void increasePlaybackTimer(void)
{
// the timer is not counting in "play pattern" mode
if (editor.playMode != PLAY_MODE_PATTERN && modBPM >= 32 && modBPM <= 255)
{
if (editor.timingMode == TEMPO_MODE_CIA)
editor.musicTime64 += musicTimeTab64[modBPM-32];
else
editor.musicTime64 += musicTimeTab64[(255-32)+1]; // vblank tempo mode
}
}
static void setCurrRowToVisited(void) // for MOD2WAV
{
if (editor.mod2WavOngoing)
editor.rowVisitTable[(modOrder * MOD_ROWS) + song->row] = true;
}
static bool renderEndCheck(void) // for MOD2WAV/PAT2SMP
{
if (!editor.mod2WavOngoing && !editor.pat2SmpOngoing)
return true; // we're not doing MOD2WAV/PAT2SMP
bool noPatternDelay = (pattDelTime2 == 0);
if (noPatternDelay)
{
if (editor.pat2SmpOngoing)
{
if (modRenderDone)
return false; // we're done rendering
}
if (editor.mod2WavOngoing && song->tick == song->speed-1)
{
bool rowVisited = editor.rowVisitTable[(modOrder * MOD_ROWS) + song->row];
if (rowVisited || modRenderDone)
{
modRenderDone = false;
return false; // we're done rendering
}
}
}
return true;
}
static void setDMA(void)
{
if (editor.muted[0]) DMACONtemp &= ~1;
if (editor.muted[1]) DMACONtemp &= ~2;
if (editor.muted[2]) DMACONtemp &= ~4;
if (editor.muted[3]) DMACONtemp &= ~8;
paulaWriteWord(0xDFF096, 0x8000 | DMACONtemp); // start DMAs for selected voices
setVisualsDMACON(0x8000 | DMACONtemp);
moduleChannel_t *ch = song->channels;
for (int32_t i = 0; i < PAULA_VOICES; i++, ch++)
{
if (DMACONtemp & ch->n_dmabit) // sample trigger
{
ch->syncAnalyzerVolume = ch->n_volume;
ch->syncAnalyzerPeriod = ch->n_period;
ch->syncFlags |= UPDATE_ANALYZER;
setVUMeterHeight(ch);
}
// these take effect after the current DMA cycle is done
const uint32_t voiceAddr = 0xDFF0A0 + (i * 16);
paulaWritePtr(voiceAddr + 0, ch->n_loopstart);
paulaWriteWord(voiceAddr + 4, ch->n_replen);
setVisualsDataPtr(i, ch->n_loopstart);
setVisualsLength(i, ch->n_replen);
}
}
void modSetTempo(int32_t bpm, bool doLockAudio)
{
if (bpm < 32 || bpm > 255)
return;
const bool audioWasntLocked = !audio.locked;
if (doLockAudio && audioWasntLocked)
lockAudio();
modBPM = bpm;
if (!editor.pat2SmpOngoing && !editor.mod2WavOngoing)
{
song->currBPM = bpm;
ui.updateSongBPM = true;
}
bpm -= 32; // 32..255 -> 0..223
audio.samplesPerTick64 = audio.samplesPerTickTable[bpm];
// calculate tick time length for audio/video sync timestamp (visualizers)
if (!editor.pat2SmpOngoing && !editor.mod2WavOngoing)
{
const uint64_t tickTimeLen64 = audio.tickLengthTable[bpm];
const uint32_t tickTimeLen = tickTimeLen64 >> 32;
const uint32_t tickTimeLenFrac = (uint32_t)tickTimeLen64;
setSyncTickTimeLen(tickTimeLen, tickTimeLenFrac);
}
if (doLockAudio && audioWasntLocked)
unlockAudio();
}
bool intMusic(void) // replayer ticker
{
// quirk: CIA BPM changes are delayed by one tick in PT, so handle previous tick's BPM change now
if (ciaSetBPM != -1)
{
const int32_t newBPM = ciaSetBPM;
modSetTempo(newBPM, false);
ciaSetBPM = -1;
}
increasePlaybackTimer();
if (!editor.stepPlayEnabled)
song->tick++;
bool readNewNote = false;
if ((uint32_t)song->tick >= (uint32_t)song->speed)
{
song->tick = 0;
readNewNote = true;
}
if (readNewNote || editor.stepPlayEnabled) // tick 0
{
if (pattDelTime2 == 0) // no pattern delay, time to read note data
{
DMACONtemp = 0; // reset Paula DMA trigger states
setCurrRowToVisited(); // for MOD2WAV
updateUIPositions(); // update current song positions in UI
// read note data and trigger voices
moduleChannel_t *ch = song->channels;
for (int32_t i = 0; i < PAULA_VOICES; i++, ch++)
{
playVoice(ch);
const uint32_t voiceAddr = 0xDFF0A0 + (i * 16);
paulaWriteWord(voiceAddr + 8, ch->n_volume);
setVisualsVolume(i, ch->n_volume);
}
setDMA();
}
else // pattern delay is on-going
{
moduleChannel_t *ch = song->channels;
for (int32_t i = 0; i < PAULA_VOICES; i++, ch++)
checkEffects(ch);
}
// increase row
if (!editor.stepPlayBackwards)
{
song->row++;
song->rowsCounter++; // for MOD2WAV's progress bar
}
if (pattDelTime > 0)
{
pattDelTime2 = pattDelTime;
pattDelTime = 0;
}
// undo row increase if pattern delay is on-going
if (pattDelTime2 > 0)
{
pattDelTime2--;
if (pattDelTime2 > 0)
{
song->row--;
song->rowsCounter--; // for MOD2WAV's progress bar
}
}
if (pBreakFlag)
{
song->row = pBreakPosition;
pBreakPosition = 0;
pBreakFlag = false;
}
// step-play handling
if (editor.stepPlayEnabled)
{
if (config.keepEditModeAfterStepPlay && editor.stepPlayLastMode == MODE_EDIT)
{
doStopIt(false);
editor.playMode = PLAY_MODE_NORMAL;
editor.currMode = MODE_EDIT;
pointerSetModeThreadSafe(POINTER_MODE_EDIT, true);
}
else
{
doStopIt(true);
}
if (editor.stepPlayLastMode == MODE_EDIT || editor.stepPlayLastMode == MODE_IDLE)
{
song->row &= 0x3F;
song->currRow = song->row;
}
else
{
// if we were playing, set replayer row to tracker row (stay in sync)
song->currRow &= 0x3F;
song->row = song->currRow;
}
editor.stepPlayEnabled = false;
editor.stepPlayBackwards = false;
ui.updatePatternData = true;
return true;
}
if (song->row >= MOD_ROWS || posJumpAssert)
nextPosition();
// for pattern block mark feature
if (editor.blockMarkFlag)
ui.updateStatusText = true;
}
else // tick > 0 (handle effects)
{
moduleChannel_t *ch = song->channels;
for (int32_t i = 0; i < PAULA_VOICES; i++, ch++)
checkEffects(ch);
if (posJumpAssert)
nextPosition();
}
// command F00 = stop song, do it here (so that the scopes are updated properly)
if (doStopSong)
{
doStopSong = false;
editor.songPlaying = false;
editor.playMode = PLAY_MODE_NORMAL;
editor.currMode = MODE_IDLE;
pointerSetModeThreadSafe(POINTER_MODE_IDLE, true);
}
return renderEndCheck(); // MOD2WAV/PAT2SMP listens to the return value (true = not done yet)
}
void modSetPattern(uint8_t pattern)
{
modPattern = pattern;
song->currPattern = modPattern;
ui.updateCurrPattText = true;
}
void modSetPos(int16_t order, int16_t row)
{
if (row != -1)
{
row = CLAMP(row, 0, 63);
song->tick = 0;
song->row = (int8_t)row;
song->currRow = (int8_t)row;
}
if (order != -1)
{
if (order >= 0)
{
modOrder = order;
song->currOrder = order;
ui.updateSongPos = true;
if (editor.currMode == MODE_PLAY && editor.playMode == PLAY_MODE_NORMAL)
{
modPattern = (int8_t)song->header.order[order];
if (modPattern > MAX_PATTERNS-1)
modPattern = MAX_PATTERNS-1;
song->currPattern = modPattern;
ui.updateCurrPattText = true;
}
ui.updateSongPattern = true;
editor.currPatternDisp = &song->header.order[modOrder];
int16_t posEdPos = song->currOrder;
if (posEdPos > song->header.numOrders-1)
posEdPos = song->header.numOrders-1;
editor.currPosEdPattDisp = &song->header.order[posEdPos];
if (ui.posEdScreenShown)
ui.updatePosEd = true;
}
}
ui.updatePatternData = true;
if (editor.blockMarkFlag)
ui.updateStatusText = true;
}
void modStop(void)
{
editor.songPlaying = false;
turnOffVoices();
if (song != NULL)
{
moduleChannel_t *ch = song->channels;
for (int32_t i = 0; i < PAULA_VOICES; i++, ch++)
{
ch->n_wavecontrol = 0;
ch->n_glissfunk = 0;
ch->n_finetune = 0;
ch->n_loopcount = 0;
}
}
pBreakFlag = false;
pattDelTime = 0;
pattDelTime2 = 0;
pBreakPosition = 0;
posJumpAssert = false;
modRenderDone = true;
/* The replayer is one tick ahead (unfortunately), so if the user was to stop the mod at the previous tick
** before a position jump (pattern loop, pattern break, position jump, row 63->0 transition, etc),
** it would be possible for the replayer to be at another order/pattern than the tracker.
** Let's set the replayer state to the tracker state on mod stop, to fix possible confusion.
*/
setReplayerPosToTrackerPos();
doStopSong = false; // just in case this flag was stuck from command F00 (stop song)
}
void playPattern(int8_t startRow)
{
if (!editor.stepPlayEnabled)
pointerSetMode(POINTER_MODE_PLAY, DO_CARRY);
audio.tickSampleCounter64 = 0; // zero tick sample counter so that it will instantly initiate a tick
song->currRow = song->row = startRow & 0x3F;
if (!editor.stepPlayEnabled)
song->tick = song->speed-1;
else
song->tick = 0;
ciaSetBPM = -1; // fix possibly stuck "set BPM" flag
editor.playMode = PLAY_MODE_PATTERN;
editor.currMode = MODE_PLAY;
editor.didQuantize = false;
editor.songPlaying = true;
}
void incPatt(void)
{
modPattern++;
if (modPattern > MAX_PATTERNS-1)
modPattern = 0;
song->currPattern = modPattern;
ui.updatePatternData = true;
ui.updateCurrPattText = true;
}
void decPatt(void)
{
modPattern--;
if (modPattern < 0)
modPattern = MAX_PATTERNS - 1;
song->currPattern = modPattern;
ui.updatePatternData = true;
ui.updateCurrPattText = true;
}
void modPlay(int16_t patt, int16_t order, int8_t row)
{
const bool audioWasntLocked = !audio.locked;
if (audioWasntLocked)
lockAudio();
doStopIt(false);
turnOffVoices();
if (row != -1)
{
if (row >= 0 && row <= 63)
{
song->row = row;
song->currRow = row;
}
}
else
{
song->row = 0;
song->currRow = 0;
}
if (editor.playMode != PLAY_MODE_PATTERN)
{
if (modOrder >= song->header.numOrders)
{
modOrder = 0;
song->currOrder = 0;
}
if (order >= 0 && order < song->header.numOrders)
{
modOrder = order;
song->currOrder = order;
}
if (order >= song->header.numOrders)
{
modOrder = 0;
song->currOrder = 0;
}
}
if (patt >= 0 && patt <= MAX_PATTERNS-1)
song->currPattern = modPattern = (int8_t)patt;
else
song->currPattern = modPattern = (int8_t)song->header.order[modOrder];
editor.currPatternDisp = &song->header.order[modOrder];
editor.currPosEdPattDisp = &song->header.order[modOrder];
song->tick = song->speed-1;
ciaSetBPM = -1; // fix possibly stuck "set BPM" flag
modRenderDone = false;
editor.songPlaying = true;
editor.didQuantize = false;
if (editor.playMode != PLAY_MODE_PATTERN)
editor.musicTime64 = 0; // don't reset playback counter in "play/rec pattern" mode
audio.tickSampleCounter64 = 0; // zero tick sample counter so that it will instantly initiate a tick
if (audioWasntLocked)
unlockAudio();
if (!editor.pat2SmpOngoing && !editor.mod2WavOngoing)
{
ui.updateSongPos = true;
ui.updatePatternData = true;
ui.updateSongPattern = true;
ui.updateCurrPattText = true;
}
}
void clearSong(void)
{
assert(song != NULL);
if (song == NULL)
return;
memset(song->header.order, 0, sizeof (song->header.order));
memset(song->header.name, 0, sizeof (song->header.name));
editor.muted[0] = false;
editor.muted[1] = false;
editor.muted[2] = false;
editor.muted[3] = false;
editor.f6Pos = 0;
editor.f7Pos = 16;
editor.f8Pos = 32;
editor.f9Pos = 48;
editor.f10Pos = 63;
editor.musicTime64 = 0;
editor.metroFlag = false;
editor.currSample = 0;
editor.editMoveAdd = 1;
editor.blockMarkFlag = false;
editor.swapChannelFlag = false;
song->header.numOrders = 1;
for (int32_t i = 0; i < MAX_PATTERNS; i++)
memset(song->patterns[i], 0, (MOD_ROWS * PAULA_VOICES) * sizeof (note_t));
moduleChannel_t *ch = song->channels;
for (int32_t i = 0; i < PAULA_VOICES; i++, ch++)
{
ch->n_wavecontrol = 0;
ch->n_glissfunk = 0;
ch->n_finetune = 0;
ch->n_loopcount = 0;
}
modSetPos(0, 0); // this also refreshes pattern data
song->currOrder = 0;
song->currPattern = 0;
editor.currPatternDisp = &song->header.order[0];
editor.currPosEdPattDisp = &song->header.order[0];
modSetTempo(editor.initialTempo, true);
modSetSpeed(editor.initialSpeed);
// disable the LED filter after clearing the song (real PT2 doesn't do this)
setLEDFilter(false);
updateCurrSample();
ui.updateSongSize = true;
ui.updateSongLength = true;
ui.updateSongName = true;
renderMuteButtons();
}
void clearSamples(void)
{
assert(song != NULL);
if (song == NULL)
return;
moduleSample_t *s = song->samples;
for (int32_t i = 0; i < MOD_SAMPLES; i++, s++)
{
s->fineTune = 0;
s->length = 0;
s->loopLength = 2;
s->loopStart = 0;
s->volume = 0;
memset(s->text, 0, sizeof (s->text));
}
memset(song->sampleData, 0, (MOD_SAMPLES + 1) * config.maxSampleLength);
editor.currSample = 0;
editor.hiLowInstr = 0;
editor.sampleZero = false;
ui.editOpScreenShown = false;
ui.aboutScreenShown = false;
editor.blockMarkFlag = false;
editor.samplePos = 0;
updateCurrSample();
}
void modFree(void)
{
if (song == NULL)
return; // not allocated
const bool audioWasntLocked = !audio.locked;
if (audioWasntLocked)
lockAudio();
turnOffVoices();
for (int32_t i = 0; i < MAX_PATTERNS; i++)
{
if (song->patterns[i] != NULL)
free(song->patterns[i]);
}
if (song->sampleData != NULL)
free(song->sampleData);
free(song);
song = NULL;
if (audioWasntLocked)
unlockAudio();
}
void restartSong(void) // for the beginning of MOD2WAV/PAT2SMP
{
if (editor.songPlaying)
modStop();
editor.playMode = PLAY_MODE_NORMAL;
editor.blockMarkFlag = false;
song->row = 0;
song->currRow = 0;
song->rowsCounter = 0;
memset(editor.rowVisitTable, 0, MOD_ORDERS * MOD_ROWS); // for MOD2WAV
if (editor.pat2SmpOngoing)
{
modSetSpeed(song->currSpeed);
modSetTempo(song->currBPM, true);
modPlay(DONT_SET_PATTERN, DONT_SET_ORDER, 0);
}
else
{
song->currSpeed = 6;
song->currBPM = 125;
modSetSpeed(song->currSpeed);
modSetTempo(song->currBPM, true);
modPlay(DONT_SET_PATTERN, 0, 0);
}
}
// this function is meant for the end of MOD2WAV/PAT2SMP
void resetSong(void) // only call this after storeTempVariables() has been called!
{
modStop();
editor.songPlaying = false;
editor.playMode = PLAY_MODE_NORMAL;
editor.currMode = MODE_IDLE;
turnOffVoices();
memset((int8_t *)editor.vuMeterVolumes, 0, sizeof (editor.vuMeterVolumes));
memset((int8_t *)editor.realVuMeterVolumes, 0, sizeof (editor.realVuMeterVolumes));
memset((int8_t *)editor.spectrumVolumes, 0, sizeof (editor.spectrumVolumes));
initializeModuleChannels(song);
modOrder = oldOrder;
modPattern = (int8_t)oldPattern;
song->row = oldRow;
song->currRow = oldRow;
song->currBPM = oldBPM;
song->currOrder = oldOrder;
song->currPattern = oldPattern;
editor.currPosDisp = &song->currOrder;
editor.currEditPatternDisp = &song->currPattern;
editor.currPatternDisp = &song->header.order[song->currOrder];
editor.currPosEdPattDisp = &song->header.order[song->currOrder];
modSetSpeed(oldSpeed);
modSetTempo(oldBPM, true);
doStopIt(true);
song->tick = 0;
modRenderDone = false;
}