add experimental low-latency mode
do not use (yet)!
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tildearrow
parent
d47a59f5f0
commit
96715ed88c
38 changed files with 201 additions and 120 deletions
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@ -1472,8 +1472,13 @@ void DivEngine::nextRow() {
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bool DivEngine::nextTick(bool noAccum) {
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bool ret=false;
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if (divider<10) divider=10;
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if (lowLatency) {
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tickMult=1000/divider;
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if (tickMult<1) tickMult=1;
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}
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cycles=got.rate*pow(2,MASTER_CLOCK_PREC)/divider;
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cycles=got.rate*pow(2,MASTER_CLOCK_PREC)/(divider*tickMult);
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clockDrift+=fmod(got.rate*pow(2,MASTER_CLOCK_PREC),(double)divider);
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if (clockDrift>=divider) {
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clockDrift-=divider;
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@ -1499,130 +1504,133 @@ bool DivEngine::nextTick(bool noAccum) {
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}
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if (!freelance) {
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if (stepPlay!=1) if (--ticks<=0) {
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ret=endOfSong;
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if (endOfSong) {
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if (song.loopModality!=2) {
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playSub(true);
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if (--subticks<=0) {
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subticks=tickMult;
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if (stepPlay!=1) if (--ticks<=0) {
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ret=endOfSong;
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if (endOfSong) {
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if (song.loopModality!=2) {
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playSub(true);
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}
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}
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endOfSong=false;
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if (stepPlay==2) stepPlay=1;
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nextRow();
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}
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endOfSong=false;
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if (stepPlay==2) stepPlay=1;
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nextRow();
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}
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// process stuff
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for (int i=0; i<chans; i++) {
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if (chan[i].rowDelay>0) {
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if (--chan[i].rowDelay==0) {
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processRow(i,true);
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// process stuff
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for (int i=0; i<chans; i++) {
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if (chan[i].rowDelay>0) {
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if (--chan[i].rowDelay==0) {
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processRow(i,true);
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}
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}
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}
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if (chan[i].retrigSpeed) {
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if (--chan[i].retrigTick<0) {
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chan[i].retrigTick=chan[i].retrigSpeed-1;
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dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,i,DIV_NOTE_NULL));
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keyHit[i]=true;
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if (chan[i].retrigSpeed) {
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if (--chan[i].retrigTick<0) {
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chan[i].retrigTick=chan[i].retrigSpeed-1;
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dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,i,DIV_NOTE_NULL));
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keyHit[i]=true;
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}
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}
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}
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if (!song.noSlidesOnFirstTick || !firstTick) {
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if (chan[i].volSpeed!=0) {
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chan[i].volume=(chan[i].volume&0xff)|(dispatchCmd(DivCommand(DIV_CMD_GET_VOLUME,i))<<8);
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chan[i].volume+=chan[i].volSpeed;
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if (chan[i].volume>chan[i].volMax) {
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chan[i].volume=chan[i].volMax;
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chan[i].volSpeed=0;
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dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
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} else if (chan[i].volume<0) {
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chan[i].volSpeed=0;
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if (song.legacyVolumeSlides) {
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chan[i].volume=chan[i].volMax+1;
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if (!song.noSlidesOnFirstTick || !firstTick) {
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if (chan[i].volSpeed!=0) {
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chan[i].volume=(chan[i].volume&0xff)|(dispatchCmd(DivCommand(DIV_CMD_GET_VOLUME,i))<<8);
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chan[i].volume+=chan[i].volSpeed;
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if (chan[i].volume>chan[i].volMax) {
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chan[i].volume=chan[i].volMax;
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chan[i].volSpeed=0;
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dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
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} else if (chan[i].volume<0) {
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chan[i].volSpeed=0;
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if (song.legacyVolumeSlides) {
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chan[i].volume=chan[i].volMax+1;
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} else {
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chan[i].volume=0;
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}
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dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
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} else {
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chan[i].volume=0;
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dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
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}
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dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
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} else {
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dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
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}
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}
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}
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if (chan[i].vibratoDepth>0) {
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chan[i].vibratoPos+=chan[i].vibratoRate;
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if (chan[i].vibratoPos>=64) chan[i].vibratoPos-=64;
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switch (chan[i].vibratoDir) {
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case 1: // up
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dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(MAX(0,(chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
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break;
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case 2: // down
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dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(MIN(0,(chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
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break;
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default: // both
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dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
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break;
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}
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}
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if (!song.noSlidesOnFirstTick || !firstTick) {
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if ((chan[i].keyOn || chan[i].keyOff) && chan[i].portaSpeed>0) {
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if (dispatchCmd(DivCommand(DIV_CMD_NOTE_PORTA,i,chan[i].portaSpeed,chan[i].portaNote))==2 && chan[i].portaStop && song.targetResetsSlides) {
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chan[i].portaSpeed=0;
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chan[i].oldNote=chan[i].note;
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chan[i].note=chan[i].portaNote;
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chan[i].inPorta=false;
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note));
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if (chan[i].vibratoDepth>0) {
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chan[i].vibratoPos+=chan[i].vibratoRate;
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if (chan[i].vibratoPos>=64) chan[i].vibratoPos-=64;
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switch (chan[i].vibratoDir) {
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case 1: // up
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dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(MAX(0,(chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
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break;
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case 2: // down
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dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(MIN(0,(chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
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break;
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default: // both
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dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
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break;
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}
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}
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}
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if (chan[i].cut>0) {
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if (--chan[i].cut<1) {
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chan[i].oldNote=chan[i].note;
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//chan[i].note=-1;
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if (chan[i].inPorta && song.noteOffResetsSlides) {
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chan[i].keyOff=true;
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chan[i].keyOn=false;
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if (chan[i].stopOnOff) {
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chan[i].portaNote=-1;
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chan[i].portaSpeed=-1;
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chan[i].stopOnOff=false;
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}
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if (disCont[dispatchOfChan[i]].dispatch->keyOffAffectsPorta(dispatchChanOfChan[i])) {
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chan[i].portaNote=-1;
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chan[i].portaSpeed=-1;
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/*if (i==2 && sysOfChan[i]==DIV_SYSTEM_SMS) {
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chan[i+1].portaNote=-1;
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chan[i+1].portaSpeed=-1;
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}*/
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}
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dispatchCmd(DivCommand(DIV_CMD_PRE_PORTA,i,false,0));
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chan[i].scheduledSlideReset=true;
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}
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dispatchCmd(DivCommand(DIV_CMD_NOTE_OFF,i));
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}
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}
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if (chan[i].resetArp) {
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note));
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chan[i].resetArp=false;
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}
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if (song.rowResetsArpPos && firstTick) {
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chan[i].arpStage=-1;
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}
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if (chan[i].arp!=0 && !chan[i].arpYield && chan[i].portaSpeed<1) {
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if (--chan[i].arpTicks<1) {
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chan[i].arpTicks=song.arpLen;
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chan[i].arpStage++;
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if (chan[i].arpStage>2) chan[i].arpStage=0;
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switch (chan[i].arpStage) {
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case 0:
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if (!song.noSlidesOnFirstTick || !firstTick) {
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if ((chan[i].keyOn || chan[i].keyOff) && chan[i].portaSpeed>0) {
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if (dispatchCmd(DivCommand(DIV_CMD_NOTE_PORTA,i,chan[i].portaSpeed,chan[i].portaNote))==2 && chan[i].portaStop && song.targetResetsSlides) {
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chan[i].portaSpeed=0;
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chan[i].oldNote=chan[i].note;
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chan[i].note=chan[i].portaNote;
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chan[i].inPorta=false;
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note));
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break;
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case 1:
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note+(chan[i].arp>>4)));
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break;
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case 2:
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note+(chan[i].arp&15)));
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break;
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}
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}
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}
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} else {
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chan[i].arpYield=false;
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if (chan[i].cut>0) {
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if (--chan[i].cut<1) {
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chan[i].oldNote=chan[i].note;
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//chan[i].note=-1;
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if (chan[i].inPorta && song.noteOffResetsSlides) {
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chan[i].keyOff=true;
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chan[i].keyOn=false;
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if (chan[i].stopOnOff) {
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chan[i].portaNote=-1;
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chan[i].portaSpeed=-1;
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chan[i].stopOnOff=false;
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}
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if (disCont[dispatchOfChan[i]].dispatch->keyOffAffectsPorta(dispatchChanOfChan[i])) {
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chan[i].portaNote=-1;
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chan[i].portaSpeed=-1;
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/*if (i==2 && sysOfChan[i]==DIV_SYSTEM_SMS) {
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chan[i+1].portaNote=-1;
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chan[i+1].portaSpeed=-1;
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}*/
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}
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dispatchCmd(DivCommand(DIV_CMD_PRE_PORTA,i,false,0));
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chan[i].scheduledSlideReset=true;
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}
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dispatchCmd(DivCommand(DIV_CMD_NOTE_OFF,i));
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}
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}
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if (chan[i].resetArp) {
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note));
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chan[i].resetArp=false;
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}
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if (song.rowResetsArpPos && firstTick) {
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chan[i].arpStage=-1;
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}
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if (chan[i].arp!=0 && !chan[i].arpYield && chan[i].portaSpeed<1) {
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if (--chan[i].arpTicks<1) {
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chan[i].arpTicks=song.arpLen;
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chan[i].arpStage++;
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if (chan[i].arpStage>2) chan[i].arpStage=0;
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switch (chan[i].arpStage) {
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case 0:
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note));
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break;
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case 1:
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note+(chan[i].arp>>4)));
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break;
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case 2:
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dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note+(chan[i].arp&15)));
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break;
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}
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}
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} else {
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chan[i].arpYield=false;
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}
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}
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}
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}
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@ -1636,7 +1644,7 @@ bool DivEngine::nextTick(bool noAccum) {
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if (stepPlay!=1) {
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if (!noAccum) {
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totalTicksR++;
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totalTicks+=1000000/divider;
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totalTicks+=1000000/(divider*tickMult);
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}
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if (totalTicks>=1000000) {
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totalTicks-=1000000;
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