446 lines
13 KiB
C++
446 lines
13 KiB
C++
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/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2023 tildearrow and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#define _USE_MATH_DEFINES
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#include "gbadma.h"
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#include "../engine.h"
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#include "../filter.h"
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#include <math.h>
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#define CHIP_DIVIDER 16
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void DivPlatformGBADMA::acquire(short** buf, size_t len) {
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// HLE for now
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int outL[2]={0,0};
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int outR[2]={0,0};
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for (size_t h=0; h<len; h++) {
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// internal mixing is always 10-bit
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for (int i=0; i<2; i++) {
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bool newSamp=h==0;
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if (chan[i].active && (chan[i].useWave || (chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen))) {
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chan[i].audSub+=(1<<outDepth);
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if (chan[i].useWave) {
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if (chan[i].audPos<(int)chan[i].audLen) {
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chan[i].audDat=chan[i].ws.output[chan[i].audPos]-0x80;
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} else {
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chan[i].audDat=0;
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}
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newSamp=true;
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if (chan[i].audSub>=chan[i].freq) {
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int posInc=chan[i].audSub/chan[i].freq;
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chan[i].audSub-=chan[i].freq*posInc;
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chan[i].audPos+=posInc;
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chan[i].dmaCount+=posInc;
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if (chan[i].dmaCount>=16 && chan[i].audPos>=(int)chan[i].audLen) {
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chan[i].audPos%=chan[i].audLen;
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}
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chan[i].dmaCount&=15;
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}
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} else {
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DivSample* s=parent->getSample(chan[i].sample);
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if (s->samples>0) {
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if (chan[i].audPos>=0 && chan[i].audPos<(int)s->samples) {
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chan[i].audDat=s->data8[chan[i].audPos];
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} else {
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chan[i].audDat=0;
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}
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newSamp=true;
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if (chan[i].audSub>=chan[i].freq) {
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int posInc=chan[i].audSub/chan[i].freq;
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chan[i].audSub-=chan[i].freq*posInc;
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chan[i].audPos+=posInc;
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chan[i].dmaCount+=posInc;
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if (s->isLoopable()) {
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if (chan[i].dmaCount>=16 && chan[i].audPos>=s->loopEnd) {
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int loopPos=chan[i].audPos-s->loopStart;
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chan[i].audPos=(loopPos%(s->loopEnd-s->loopStart))+s->loopStart;
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}
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} else if (chan[i].audPos>=(int)s->samples) {
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chan[i].sample=-1;
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}
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chan[i].dmaCount&=15;
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}
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} else {
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chan[i].sample=-1;
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chan[i].audSub=0;
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chan[i].audPos=0;
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}
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}
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} else {
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chan[i].audDat=0;
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}
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if (!isMuted[i] && newSamp) {
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int out=chan[i].audDat*(chan[i].vol*chan[i].envVol/2)<<1;
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outL[i]=(chan[i].pan&2)?out:0;
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outR[i]=(chan[i].pan&1)?out:0;
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}
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oscBuf[i]->data[oscBuf[i]->needle++]=(short)((outL[i]+outR[i])<<5);
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}
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int l=outL[0]+outL[1];
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int r=outR[0]+outR[1];
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l=(l>>(10-outDepth))<<(16-outDepth);
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r=(r>>(10-outDepth))<<(16-outDepth);
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if (l<-32768) l=-32768;
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if (l>32767) l=32767;
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if (r<-32768) r=-32768;
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if (r>32767) r=32767;
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buf[0][h]=(short)l;
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buf[1][h]=(short)r;
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}
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}
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void DivPlatformGBADMA::tick(bool sysTick) {
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for (int i=0; i<2; i++) {
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DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_AMIGA);
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chan[i].std.next();
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if (chan[i].std.vol.had) {
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chan[i].envVol=chan[i].std.vol.val;
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if (ins->type==DIV_INS_AMIGA) chan[i].envVol/=32;
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}
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if (NEW_ARP_STRAT) {
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chan[i].handleArp();
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} else if (chan[i].std.arp.had) {
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if (!chan[i].inPorta) {
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chan[i].baseFreq=NOTE_PERIODIC(parent->calcArp(chan[i].note,chan[i].std.arp.val));
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].useWave && chan[i].std.wave.had) {
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if (chan[i].wave!=chan[i].std.wave.val || chan[i].ws.activeChanged()) {
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chan[i].wave=chan[i].std.wave.val;
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chan[i].ws.changeWave1(chan[i].wave);
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if (!chan[i].keyOff) chan[i].keyOn=true;
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}
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}
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if (chan[i].useWave && chan[i].active) {
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chan[i].ws.tick();
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}
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if (chan[i].std.pitch.had) {
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if (chan[i].std.pitch.mode) {
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chan[i].pitch2+=chan[i].std.pitch.val;
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CLAMP_VAR(chan[i].pitch2,-32768,32767);
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} else {
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chan[i].pitch2=chan[i].std.pitch.val;
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}
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chan[i].freqChanged=true;
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}
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if (ins->type==DIV_INS_AMIGA) {
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if (chan[0].std.panL.had) {
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chan[0].pan=(chan[0].pan&~2)|(chan[0].std.panL.val>0?2:0);
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}
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if (chan[0].std.panR.had) {
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chan[0].pan=(chan[0].pan&~1)|(chan[0].std.panR.val>0?1:0);
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}
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} else {
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if (chan[i].std.panL.had) {
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chan[i].pan=chan[i].std.panL.val&3;
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}
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}
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if (chan[i].std.phaseReset.had && chan[i].std.phaseReset.val==1) {
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chan[i].audPos=0;
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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double off=1.0;
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if (!chan[i].useWave && chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(chan[i].sample);
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off=(s->centerRate>=1)?(8363.0/(double)s->centerRate):1.0;
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}
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chan[i].freq=off*parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
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// emulate prescaler rounding
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if (chan[i].freq<65536) {
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if (chan[i].freq<1) chan[i].freq=1;
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} else if (chan[i].freq<65536*64) {
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chan[i].freq=chan[i].freq&~63;
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} else if (chan[i].freq<65536*256) {
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chan[i].freq=chan[i].freq&~255;
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} else {
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chan[i].freq=chan[i].freq&~1024;
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if (chan[i].freq>65536*1024) chan[i].freq=65536*1024;
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}
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if (chan[i].keyOn) {
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if (!chan[i].std.vol.had) {
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chan[i].envVol=2;
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}
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chan[i].keyOn=false;
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}
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if (chan[i].keyOff) {
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chan[i].keyOff=false;
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}
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chan[i].freqChanged=false;
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}
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}
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}
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int DivPlatformGBADMA::dispatch(DivCommand c) {
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switch (c.cmd) {
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case DIV_CMD_NOTE_ON: {
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DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA);
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if (ins->amiga.useWave) {
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chan[c.chan].useWave=true;
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chan[c.chan].audLen=ins->amiga.waveLen+1;
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if (chan[c.chan].insChanged) {
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if (chan[c.chan].wave<0) {
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chan[c.chan].wave=0;
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chan[c.chan].ws.setWidth(chan[c.chan].audLen);
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chan[c.chan].ws.changeWave1(chan[c.chan].wave);
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}
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}
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} else {
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].sample=ins->amiga.getSample(c.value);
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c.value=ins->amiga.getFreq(c.value);
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}
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chan[c.chan].useWave=false;
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}
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
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}
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if (chan[c.chan].useWave || chan[c.chan].sample<0 || chan[c.chan].sample>=parent->song.sampleLen) {
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chan[c.chan].sample=-1;
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}
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if (chan[c.chan].setPos) {
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chan[c.chan].setPos=false;
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} else {
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chan[c.chan].audPos=0;
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}
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chan[c.chan].audSub=0;
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chan[c.chan].audDat=0;
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chan[c.chan].dmaCount=0;
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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}
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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chan[c.chan].macroInit(ins);
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if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
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chan[c.chan].envVol=2;
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}
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if (chan[c.chan].useWave) {
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chan[c.chan].ws.init(ins,chan[c.chan].audLen,255,chan[c.chan].insChanged);
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}
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chan[c.chan].insChanged=false;
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break;
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}
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case DIV_CMD_NOTE_OFF:
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chan[c.chan].sample=-1;
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chan[c.chan].active=false;
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chan[c.chan].keyOff=true;
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chan[c.chan].macroInit(NULL);
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break;
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case DIV_CMD_NOTE_OFF_ENV:
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case DIV_CMD_ENV_RELEASE:
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chan[c.chan].std.release();
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break;
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case DIV_CMD_INSTRUMENT:
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if (chan[c.chan].ins!=c.value || c.value2==1) {
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chan[c.chan].ins=c.value;
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chan[c.chan].insChanged=true;
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}
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break;
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case DIV_CMD_VOLUME:
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if (chan[c.chan].vol!=c.value) {
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chan[c.chan].vol=c.value;
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if (!chan[c.chan].std.vol.has) {
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chan[c.chan].envVol=2;
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}
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}
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break;
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case DIV_CMD_GET_VOLUME:
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return chan[c.chan].vol;
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break;
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case DIV_CMD_PANNING:
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chan[c.chan].pan=0;
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chan[c.chan].pan|=(c.value>0)?2:0;
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chan[c.chan].pan|=(c.value2>0)?1:0;
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break;
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case DIV_CMD_PITCH:
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chan[c.chan].pitch=c.value;
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chan[c.chan].freqChanged=true;
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break;
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case DIV_CMD_WAVE:
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if (!chan[c.chan].useWave) break;
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chan[c.chan].wave=c.value;
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chan[c.chan].keyOn=true;
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chan[c.chan].ws.changeWave1(chan[c.chan].wave);
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break;
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case DIV_CMD_NOTE_PORTA: {
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DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA);
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chan[c.chan].sample=ins->amiga.getSample(c.value2);
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int destFreq=NOTE_PERIODIC(c.value2);
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bool return2=false;
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if (destFreq>chan[c.chan].baseFreq) {
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chan[c.chan].baseFreq+=c.value;
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if (chan[c.chan].baseFreq>=destFreq) {
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chan[c.chan].baseFreq=destFreq;
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return2=true;
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}
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} else {
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chan[c.chan].baseFreq-=c.value;
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if (chan[c.chan].baseFreq<=destFreq) {
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chan[c.chan].baseFreq=destFreq;
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return2=true;
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}
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}
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chan[c.chan].freqChanged=true;
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if (return2) {
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chan[c.chan].inPorta=false;
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return 2;
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}
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break;
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}
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case DIV_CMD_LEGATO: {
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chan[c.chan].baseFreq=NOTE_PERIODIC(c.value+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val):(0)));
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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break;
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}
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case DIV_CMD_PRE_PORTA:
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if (chan[c.chan].active && c.value2) {
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if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA));
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}
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chan[c.chan].inPorta=c.value;
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break;
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case DIV_CMD_SAMPLE_POS:
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if (chan[c.chan].useWave) break;
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chan[c.chan].audPos=c.value;
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chan[c.chan].setPos=true;
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break;
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case DIV_CMD_GET_VOLMAX:
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return 2;
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break;
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case DIV_CMD_MACRO_OFF:
|
||
|
|
chan[c.chan].std.mask(c.value,true);
|
||
|
|
break;
|
||
|
|
case DIV_CMD_MACRO_ON:
|
||
|
|
chan[c.chan].std.mask(c.value,false);
|
||
|
|
break;
|
||
|
|
case DIV_ALWAYS_SET_VOLUME:
|
||
|
|
return 1;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
void DivPlatformGBADMA::muteChannel(int ch, bool mute) {
|
||
|
|
isMuted[ch]=mute;
|
||
|
|
}
|
||
|
|
|
||
|
|
void DivPlatformGBADMA::forceIns() {
|
||
|
|
for (int i=0; i<2; i++) {
|
||
|
|
chan[i].insChanged=true;
|
||
|
|
chan[i].freqChanged=true;
|
||
|
|
chan[i].audPos=0;
|
||
|
|
chan[i].sample=-1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void* DivPlatformGBADMA::getChanState(int ch) {
|
||
|
|
return &chan;
|
||
|
|
}
|
||
|
|
|
||
|
|
DivDispatchOscBuffer* DivPlatformGBADMA::getOscBuffer(int ch) {
|
||
|
|
return oscBuf[ch];
|
||
|
|
}
|
||
|
|
|
||
|
|
void DivPlatformGBADMA::reset() {
|
||
|
|
for (int i=0; i<2; i++) {
|
||
|
|
chan[i]=DivPlatformGBADMA::Channel();
|
||
|
|
chan[i].std.setEngine(parent);
|
||
|
|
chan[i].ws.setEngine(parent);
|
||
|
|
chan[i].ws.init(NULL,32,255);
|
||
|
|
chan[i].audDat=0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int DivPlatformGBADMA::getOutputCount() {
|
||
|
|
return 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
DivMacroInt* DivPlatformGBADMA::getChanMacroInt(int ch) {
|
||
|
|
return &chan[ch].std;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned short DivPlatformGBADMA::getPan(int ch) {
|
||
|
|
return ((chan[ch].pan&2)<<7)|(chan[ch].pan&1);
|
||
|
|
}
|
||
|
|
|
||
|
|
DivSamplePos DivPlatformGBADMA::getSamplePos(int ch) {
|
||
|
|
if (ch>=2) return DivSamplePos();
|
||
|
|
return DivSamplePos(
|
||
|
|
chan[ch].sample,
|
||
|
|
chan[ch].audPos,
|
||
|
|
chan[ch].freq
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
void DivPlatformGBADMA::notifyInsChange(int ins) {
|
||
|
|
for (int i=0; i<2; i++) {
|
||
|
|
if (chan[i].ins==ins) {
|
||
|
|
chan[i].insChanged=true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void DivPlatformGBADMA::notifyWaveChange(int wave) {
|
||
|
|
for (int i=0; i<2; i++) {
|
||
|
|
if (chan[i].useWave && chan[i].wave==wave) {
|
||
|
|
chan[i].ws.changeWave1(wave);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void DivPlatformGBADMA::notifyInsDeletion(void* ins) {
|
||
|
|
for (int i=0; i<2; i++) {
|
||
|
|
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void DivPlatformGBADMA::setFlags(const DivConfig& flags) {
|
||
|
|
outDepth=flags.getInt("dacDepth",9);
|
||
|
|
chipClock=1<<24;
|
||
|
|
CHECK_CUSTOM_CLOCK;
|
||
|
|
rate=chipClock>>outDepth;
|
||
|
|
for (int i=0; i<2; i++) {
|
||
|
|
oscBuf[i]->rate=rate;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int DivPlatformGBADMA::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
|
||
|
|
parent=p;
|
||
|
|
dumpWrites=false;
|
||
|
|
skipRegisterWrites=false;
|
||
|
|
for (int i=0; i<2; i++) {
|
||
|
|
isMuted[i]=false;
|
||
|
|
oscBuf[i]=new DivDispatchOscBuffer;
|
||
|
|
}
|
||
|
|
setFlags(flags);
|
||
|
|
reset();
|
||
|
|
return 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
void DivPlatformGBADMA::quit() {
|
||
|
|
for (int i=0; i<2; i++) {
|
||
|
|
delete oscBuf[i];
|
||
|
|
}
|
||
|
|
}
|