etc/furnace
0
0
Fork 0
mirror of https://github.com/tildearrow/furnace.git synced 2024-11-06 12:55:05 +00:00
Code Issues Projects Releases Packages Wiki Activity
furnace/src/engine/playback.cpp
tildearrow 79f15fcbd8 fix a silly bug 
TODO: apparently this song requires accurate porta...
2021-05-19 03:09:51 -05:00

527 lines
15 KiB
C++
Raw Blame History

#include "engine.h"
void DivEngine::nextOrder() {
curRow=0;
if (++curOrder>=song.ordersLen) {
curOrder=0;
}
}
const char* notes[12]={
"C-", "C#", "D-", "D#", "E-", "F-", "F#", "G-", "G#", "A-", "A#", "B-"
};
const char* cmdName[DIV_CMD_MAX]={
"NOTE_ON",
"NOTE_OFF",
"INSTRUMENT",
"VOLUME",
"GET_VOLUME",
"GET_VOLMAX",
"NOTE_PORTA",
"PITCH",
"PANNING",
"LEGATO",
"PRE_PORTA",
"SAMPLE_MODE",
"FM_TL",
"FM_AR",
"FM_FB",
"FM_MULT",
"FM_EXTCH",
"GENESIS_LFO",
"ARCADE_LFO",
"STD_NOISE_FREQ",
"STD_NOISE_MODE"
};
const char* formatNote(unsigned char note, unsigned char octave) {
static char ret[4];
if (note==100) {
return "OFF";
} else if (octave==0 && note==0) {
return "---";
}
snprintf(ret,4,"%s%d",notes[note%12],octave+note/12);
return ret;
}
int DivEngine::dispatchCmd(DivCommand c) {
if (view==DIV_STATUS_COMMANDS) {
printf("%8d | %d: %s(%d, %d)\n",totalTicks,c.chan,cmdName[c.cmd],c.value,c.value2);
}
totalCmds++;
return dispatch->dispatch(c);
}
bool DivEngine::perSystemEffect(int ch, unsigned char effect, unsigned char effectVal) {
switch (song.system) {
case DIV_SYSTEM_GENESIS:
case DIV_SYSTEM_GENESIS_EXT:
switch (effect) {
case 0x17: // DAC enable
dispatchCmd(DivCommand(DIV_CMD_SAMPLE_MODE,ch,(effectVal>0)));
break;
case 0x20: // SN noise mode
dispatchCmd(DivCommand(DIV_CMD_STD_NOISE_MODE,ch,effectVal));
break;
default:
return false;
}
break;
case DIV_SYSTEM_SMS:
switch (effect) {
case 0x20: // SN noise mode
dispatchCmd(DivCommand(DIV_CMD_STD_NOISE_MODE,ch,effectVal));
break;
default:
return false;
}
break;
default:
return false;
}
return true;
}
bool DivEngine::perSystemPostEffect(int ch, unsigned char effect, unsigned char effectVal) {
switch (song.system) {
case DIV_SYSTEM_GENESIS:
case DIV_SYSTEM_GENESIS_EXT:
switch (effect) {
case 0x11: // FB
dispatchCmd(DivCommand(DIV_CMD_FM_FB,ch,effectVal&7));
break;
case 0x12: // TL op1
dispatchCmd(DivCommand(DIV_CMD_FM_TL,ch,0,effectVal&0x7f));
break;
case 0x13: // TL op2
dispatchCmd(DivCommand(DIV_CMD_FM_TL,ch,1,effectVal&0x7f));
break;
case 0x14: // TL op3
dispatchCmd(DivCommand(DIV_CMD_FM_TL,ch,2,effectVal&0x7f));
break;
case 0x15: // TL op4
dispatchCmd(DivCommand(DIV_CMD_FM_TL,ch,3,effectVal&0x7f));
break;
case 0x16: // MULT
if ((effectVal>>4)>0 && (effectVal>>4)<5) {
dispatchCmd(DivCommand(DIV_CMD_FM_MULT,ch,(effectVal>>4)-1,effectVal&15));
}
break;
case 0x18: // EXT
dispatchCmd(DivCommand(DIV_CMD_FM_EXTCH,ch,effectVal));
break;
case 0x19: // AR global
dispatchCmd(DivCommand(DIV_CMD_FM_AR,ch,-1,effectVal&31));
break;
case 0x1a: // AR op1
dispatchCmd(DivCommand(DIV_CMD_FM_AR,ch,0,effectVal&31));
break;
case 0x1b: // AR op2
dispatchCmd(DivCommand(DIV_CMD_FM_AR,ch,1,effectVal&31));
break;
case 0x1c: // AR op3
dispatchCmd(DivCommand(DIV_CMD_FM_AR,ch,2,effectVal&31));
break;
case 0x1d: // AR op4
dispatchCmd(DivCommand(DIV_CMD_FM_AR,ch,3,effectVal&31));
break;
default:
return false;
}
break;
default:
return false;
}
return true;
}
void DivEngine::processRow(int i, bool afterDelay) {
DivPattern* pat=song.pat[i]->data[curOrder];
// pre effects
if (!afterDelay) for (int j=0; j<song.pat[i]->effectRows; j++) {
short effect=pat->data[curRow][4+(j<<1)];
short effectVal=pat->data[curRow][5+(j<<1)];
if (effectVal==-1) effectVal=0;
if (effect==0xed) {
chan[i].rowDelay=effectVal+1;
return;
}
}
// instrument
if (pat->data[curRow][2]!=-1) {
dispatchCmd(DivCommand(DIV_CMD_INSTRUMENT,i,pat->data[curRow][2]));
}
// note
if (pat->data[curRow][0]==100) {
chan[i].note=-1;
chan[i].keyOn=false;
dispatchCmd(DivCommand(DIV_CMD_NOTE_OFF,i));
} else if (!(pat->data[curRow][0]==0 && pat->data[curRow][1]==0)) {
chan[i].note=pat->data[curRow][0]+pat->data[curRow][1]*12;
chan[i].arp=0;
chan[i].doNote=true;
}
// volume
if (pat->data[curRow][3]!=-1) {
if ((MIN(chan[i].volMax,chan[i].volume)>>8)!=pat->data[curRow][3]) {
chan[i].volume=pat->data[curRow][3]<<8;
dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
}
}
// effects
for (int j=0; j<song.pat[i]->effectRows; j++) {
short effect=pat->data[curRow][4+(j<<1)];
short effectVal=pat->data[curRow][5+(j<<1)];
if (effectVal==-1) effectVal=0;
// per-system effect
if (!perSystemEffect(i,effect,effectVal)) switch (effect) {
case 0x09: // speed 1
song.speed1=effectVal;
break;
case 0x0f: // speed 2
song.speed2=effectVal;
break;
case 0x0b: // change order
changeOrd=effectVal;
changePos=0;
break;
case 0x0d: // next order
changeOrd=curOrder+1;
changePos=effectVal;
break;
case 0x08: // panning
dispatchCmd(DivCommand(DIV_CMD_PANNING,i,effectVal));
break;
case 0x01: // ramp up
if (effectVal==0) {
chan[i].portaNote=-1;
chan[i].portaSpeed=-1;
} else {
chan[i].portaNote=0x60;
chan[i].portaSpeed=effectVal;
chan[i].portaStop=false;
}
break;
case 0x02: // ramp down
if (effectVal==0) {
chan[i].portaNote=-1;
chan[i].portaSpeed=-1;
} else {
chan[i].portaNote=0x00;
chan[i].portaSpeed=effectVal;
chan[i].portaStop=true;
chan[i].nowYouCanStop=false;
}
break;
case 0x03: // portamento
if (effectVal==0) {
chan[i].portaNote=-1;
chan[i].portaSpeed=-1;
} else {
chan[i].portaNote=chan[i].note;
chan[i].portaSpeed=effectVal;
chan[i].portaStop=true;
chan[i].doNote=false;
dispatchCmd(DivCommand(DIV_CMD_PRE_PORTA,i));
}
break;
case 0x04: // vibrato
chan[i].vibratoDepth=effectVal&15;
chan[i].vibratoRate=effectVal>>4;
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
break;
case 0x0a: // volume ramp
if (effectVal!=0) {
if ((effectVal&15)!=0) {
chan[i].volSpeed=-(effectVal&15)*64;
} else {
chan[i].volSpeed=(effectVal>>4)*64;
}
} else {
chan[i].volSpeed=0;
}
break;
case 0x00: // arpeggio
chan[i].arp=effectVal;
break;
case 0x0c: // retrigger
chan[i].rowDelay=effectVal+1;
break;
case 0xe0: // arp speed
song.arpLen=effectVal;
break;
case 0xe1: // portamento up
chan[i].portaNote=chan[i].note+(effectVal&15);
chan[i].portaSpeed=(effectVal>>4)*4;
chan[i].portaStop=true;
chan[i].nowYouCanStop=false;
break;
case 0xe2: // portamento down
chan[i].portaNote=chan[i].note-(effectVal&15);
chan[i].portaSpeed=(effectVal>>4)*4;
chan[i].portaStop=true;
chan[i].nowYouCanStop=false;
break;
case 0xe3: // vibrato direction
chan[i].vibratoDir=effectVal;
break;
case 0xe4: // vibrato fine
chan[i].vibratoFine=effectVal;
break;
case 0xe5: // pitch
chan[i].pitch=effectVal-0x80;
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
break;
case 0xea: // legato mode
chan[i].legato=effectVal;
break;
case 0xec: // delayed note cut
chan[i].cut=effectVal+1;
break;
case 0xee: // external command
printf("\x1b[1;36m%d: extern command %d\x1b[m\n",i,effectVal);
break;
}
}
if (chan[i].doNote) {
chan[i].vibratoPos=0;
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
if (chan[i].legato) {
dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note));
} else {
dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,i,chan[i].note,chan[i].volume>>8));
}
chan[i].doNote=false;
if (!chan[i].keyOn) {
if (chan[i].portaStop && chan[i].nowYouCanStop) {
chan[i].portaNote=-1;
chan[i].portaSpeed=-1;
}
}
chan[i].keyOn=true;
}
chan[i].nowYouCanStop=true;
// post effects
for (int j=0; j<song.pat[i]->effectRows; j++) {
short effect=pat->data[curRow][4+(j<<1)];
short effectVal=pat->data[curRow][5+(j<<1)];
if (effectVal==-1) effectVal=0;
perSystemPostEffect(i,effect,effectVal);
}
}
void DivEngine::nextRow() {
static char pb[4096];
static char pb1[4096];
static char pb2[4096];
static char pb3[4096];
if (++curRow>=song.patLen) {
nextOrder();
}
if (changeOrd>=0) {
curRow=changePos;
curOrder=changeOrd;
if (curOrder>=song.ordersLen) {
curOrder=0;
}
changeOrd=-1;
}
if (view==DIV_STATUS_PATTERN) {
strcpy(pb1,"");
strcpy(pb3,"");
for (int i=0; i<chans; i++) {
snprintf(pb,4095," %.2x",song.orders.ord[i][curOrder]);
strcat(pb1,pb);
DivPattern* pat=song.pat[i]->data[curOrder];
snprintf(pb2,4095,"\x1b[37m %s",
formatNote(pat->data[curRow][0],pat->data[curRow][1]));
strcat(pb3,pb2);
if (pat->data[curRow][3]==-1) {
strcat(pb3,"\x1b[m--");
} else {
snprintf(pb2,4095,"\x1b[1;32m%.2x",pat->data[curRow][3]);
strcat(pb3,pb2);
}
if (pat->data[curRow][2]==-1) {
strcat(pb3,"\x1b[m--");
} else {
snprintf(pb2,4095,"\x1b[0;36m%.2x",pat->data[curRow][2]);
strcat(pb3,pb2);
}
for (int j=0; j<song.pat[i]->effectRows; j++) {
if (pat->data[curRow][4+(j<<1)]==-1) {
strcat(pb3,"\x1b[m--");
} else {
snprintf(pb2,4095,"\x1b[1;31m%.2x",pat->data[curRow][4+(j<<1)]);
strcat(pb3,pb2);
}
if (pat->data[curRow][5+(j<<1)]==-1) {
strcat(pb3,"\x1b[m--");
} else {
snprintf(pb2,4095,"\x1b[1;37m%.2x",pat->data[curRow][5+(j<<1)]);
strcat(pb3,pb2);
}
}
}
printf("| %.2x:%s | \x1b[1;33m%3d%s\x1b[m\n",curOrder,pb1,curRow,pb3);
}
for (int i=0; i<chans; i++) {
chan[i].rowDelay=0;
processRow(i,false);
}
}
void DivEngine::nextTick() {
if (song.customTempo) {
cycles=dispatch->rate/song.hz;
} else {
if (song.pal) {
cycles=dispatch->rate/60;
} else {
cycles=dispatch->rate/50;
}
}
if (--ticks<=0) {
nextRow();
if (speedAB) {
ticks=song.speed2*(song.timeBase+1);
} else {
ticks=song.speed1*(song.timeBase+1);
}
speedAB=!speedAB;
}
// process stuff
for (int i=0; i<chans; i++) {
if (chan[i].rowDelay>0) {
if (--chan[i].rowDelay==0) {
processRow(i,true);
}
}
if (chan[i].volSpeed!=0) {
chan[i].volume=(chan[i].volume&0xff)|(dispatchCmd(DivCommand(DIV_CMD_GET_VOLUME,i))<<8);
chan[i].volume+=chan[i].volSpeed;
if (chan[i].volume>chan[i].volMax) {
chan[i].volume=chan[i].volMax;
chan[i].volSpeed=0;
dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
} else if (chan[i].volume<0) {
chan[i].volSpeed=0;
chan[i].volume=chan[i].volMax+1;
dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
} else {
dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
}
}
if (chan[i].vibratoDepth>0) {
chan[i].vibratoPos+=chan[i].vibratoRate;
if (chan[i].vibratoPos>=64) chan[i].vibratoPos-=64;
switch (chan[i].vibratoDir) {
case 1: // up
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(MAX(0,(chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
break;
case 2: // down
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(MIN(0,(chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
break;
default: // both
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
break;
}
}
if (chan[i].portaSpeed>0) {
if (dispatchCmd(DivCommand(DIV_CMD_NOTE_PORTA,i,chan[i].portaSpeed,chan[i].portaNote))==2 && chan[i].portaStop) {
chan[i].portaSpeed=0;
}
}
if (chan[i].cut>0) {
if (--chan[i].cut<1) {
chan[i].note=-1;
dispatchCmd(DivCommand(DIV_CMD_NOTE_OFF,i));
}
}
if (chan[i].arp!=0 && chan[i].portaSpeed<1) {
if (--chan[i].arpTicks<1) {
chan[i].arpTicks=song.arpLen;
chan[i].arpStage++;
if (chan[i].arpStage>2) chan[i].arpStage=0;
switch (chan[i].arpStage) {
case 0:
dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note));
break;
case 1:
dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note+(chan[i].arp>>4)));
break;
case 2:
dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note+(chan[i].arp&15)));
break;
}
}
}
}
// system tick
dispatch->tick();
totalTicks++;
int hz;
if (song.customTempo) {
hz=song.hz;
} else if (song.pal) {
hz=60;
} else {
hz=50;
}
fprintf(stderr,"\x1b[2K> %d:%.2d:%.2d.%.2d %.2x/%.2x:%.3d/%.3d %4dcmd/s\x1b[G",totalTicks/(hz*3600),(totalTicks/(hz*60))%60,(totalTicks/hz)%60,totalTicks%hz,curOrder,song.ordersLen,curRow,song.patLen,cmdsPerSecond);
if ((totalTicks%hz)==0) {
cmdsPerSecond=totalCmds-lastCmds;
lastCmds=totalCmds;
}
}
void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsigned int size) {
size_t runtotal=blip_clocks_needed(bb[0],size);
for (size_t i=0; i<runtotal; i++) {
if (--cycles<=0) {
nextTick();
}
dispatch->acquire(temp[0],temp[1]);
blip_add_delta(bb[0],i,temp[0]-prevSample[0]);
blip_add_delta(bb[1],i,temp[1]-prevSample[1]);
prevSample[0]=temp[0];
prevSample[1]=temp[1];
}
blip_end_frame(bb[0],runtotal);
blip_end_frame(bb[1],runtotal);
blip_read_samples(bb[0],bbOut[0],size,0);
blip_read_samples(bb[1],bbOut[1],size,0);
for (size_t i=0; i<size; i++) {
out[0][i]=(float)bbOut[0][i]/16384.0;
out[1][i]=(float)bbOut[1][i]/16384.0;
}
}
Reference in a new issue View git blame Copy permalink