531 lines
17 KiB
C++
531 lines
17 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2022 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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#include "segapcm.h"
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#include "../engine.h"
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#include "../../ta-log.h"
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#include <string.h>
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#include <math.h>
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//#define rWrite(a,v) if (!skipRegisterWrites) {pendingWrites[a]=v;}
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//#define immWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
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void DivPlatformSegaPCM::acquire(short** buf, size_t len) {
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static int os[2];
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for (size_t h=0; h<len; h++) {
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os[0]=0; os[1]=0;
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// do a PCM cycle
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pcmL=0; pcmR=0;
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for (int i=0; i<16; i++) {
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if (chan[i].pcm.sample>=0 && chan[i].pcm.sample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(chan[i].pcm.sample);
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if (s->samples<=0) {
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chan[i].pcm.sample=-1;
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oscBuf[i]->data[oscBuf[i]->needle++]=0;
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continue;
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}
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if (!isMuted[i]) {
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oscBuf[i]->data[oscBuf[i]->needle++]=s->data8[chan[i].pcm.pos>>8]*(chan[i].chVolL+chan[i].chVolR)>>1;
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pcmL+=(s->data8[chan[i].pcm.pos>>8]*chan[i].chVolL);
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pcmR+=(s->data8[chan[i].pcm.pos>>8]*chan[i].chVolR);
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} else {
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oscBuf[i]->data[oscBuf[i]->needle++]=0;
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}
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chan[i].pcm.pos+=chan[i].pcm.freq;
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if (s->isLoopable() && chan[i].pcm.pos>=((unsigned int)s->loopEnd<<8)) {
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chan[i].pcm.pos=s->loopStart<<8;
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} else if (chan[i].pcm.pos>=(s->samples<<8)) {
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chan[i].pcm.sample=-1;
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}
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} else {
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oscBuf[i]->data[oscBuf[i]->needle++]=0;
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}
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}
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os[0]=pcmL;
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if (os[0]<-32768) os[0]=-32768;
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if (os[0]>32767) os[0]=32767;
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os[1]=pcmR;
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if (os[1]<-32768) os[1]=-32768;
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if (os[1]>32767) os[1]=32767;
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buf[0][h]=os[0];
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buf[1][h]=os[1];
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}
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}
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void DivPlatformSegaPCM::tick(bool sysTick) {
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for (int i=0; i<16; i++) {
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chan[i].std.next();
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if (parent->song.newSegaPCM) {
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if (chan[i].std.vol.had) {
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chan[i].outVol=(chan[i].vol*MIN(chan[i].macroVolMul,chan[i].std.vol.val))/chan[i].macroVolMul;
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chan[i].chVolL=(chan[i].outVol*chan[i].chPanL)/127;
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chan[i].chVolR=(chan[i].outVol*chan[i].chPanR)/127;
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if (dumpWrites) {
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addWrite(0x10002+(i<<3),chan[i].chVolL);
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addWrite(0x10003+(i<<3),chan[i].chVolR);
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}
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}
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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=(parent->calcArp(chan[i].note,chan[i].std.arp.val)<<6);
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}
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chan[i].freqChanged=true;
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}
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if (parent->song.newSegaPCM) if (chan[i].std.panL.had) {
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chan[i].chPanL=chan[i].std.panL.val&127;
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chan[i].chVolL=(chan[i].outVol*chan[i].chPanL)/127;
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if (dumpWrites) {
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addWrite(0x10002+(i<<3),chan[i].chVolL);
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}
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}
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if (parent->song.newSegaPCM) if (chan[i].std.panR.had) {
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chan[i].chPanR=chan[i].std.panR.val&127;
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chan[i].chVolR=(chan[i].outVol*chan[i].chPanR)/127;
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if (dumpWrites) {
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addWrite(0x10003+(i<<3),chan[i].chVolR);
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}
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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 (chan[i].std.phaseReset.had) {
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if (chan[i].std.phaseReset.val==1 && chan[i].active) {
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chan[i].keyOn=true;
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}
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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chan[i].freq=chan[i].baseFreq+(chan[i].pitch>>1)-64;
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if (!parent->song.oldArpStrategy) {
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if (chan[i].fixedArp) {
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chan[i].freq=(chan[i].baseNoteOverride<<6)+(chan[i].pitch>>1)-64+chan[i].pitch2;
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} else {
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chan[i].freq+=chan[i].arpOff<<6;
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}
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}
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if (chan[i].furnacePCM) {
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double off=1.0;
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if (chan[i].pcm.sample>=0 && chan[i].pcm.sample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(chan[i].pcm.sample);
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off=(double)s->centerRate/8363.0;
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}
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chan[i].pcm.freq=MIN(255,(15625+(off*parent->song.tuning*pow(2.0,double(chan[i].freq+256)/(64.0*12.0)))*255)/31250)+chan[i].pitch2;
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if (dumpWrites) {
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addWrite(0x10007+(i<<3),chan[i].pcm.freq);
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}
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}
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chan[i].freqChanged=false;
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if (chan[i].keyOn || chan[i].keyOff) {
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if (chan[i].keyOn && !chan[i].keyOff) {
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if (dumpWrites) {
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addWrite(0x10086+(i<<3),3);
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}
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chan[i].pcm.pos=0;
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if (chan[i].furnacePCM) {
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if (dumpWrites) { // Sega PCM writes
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DivSample* s=parent->getSample(chan[i].pcm.sample);
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int loopStart=s->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
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int actualLength=(s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT));
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if (actualLength>0xfeff) actualLength=0xfeff;
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addWrite(0x10086+(i<<3),3+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
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addWrite(0x10084+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample])&0xff);
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addWrite(0x10085+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample]>>8)&0xff);
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addWrite(0x10006+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-1)>>8));
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if (loopStart<0 || loopStart>=actualLength) {
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addWrite(0x10086+(i<<3),2+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
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} else {
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int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart+s->loopOffP;
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addWrite(0x10004+(i<<3),loopPos&0xff);
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addWrite(0x10005+(i<<3),(loopPos>>8)&0xff);
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addWrite(0x10086+(i<<3),((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
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}
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}
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} else {
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if (dumpWrites) { // Sega PCM writes
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DivSample* s=parent->getSample(chan[i].pcm.sample);
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int loopStart=s->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
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int actualLength=(s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT));
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if (actualLength>65536) actualLength=65536;
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addWrite(0x10086+(i<<3),3+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
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addWrite(0x10084+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample])&0xff);
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addWrite(0x10085+(i<<3),(sampleOffSegaPCM[chan[i].pcm.sample]>>8)&0xff);
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addWrite(0x10006+(i<<3),MIN(255,((sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+actualLength-1)>>8));
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if (loopStart<0 || loopStart>=actualLength) {
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addWrite(0x10086+(i<<3),2+((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
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} else {
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int loopPos=(sampleOffSegaPCM[chan[i].pcm.sample]&0xffff)+loopStart+s->loopOffP;
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addWrite(0x10004+(i<<3),loopPos&0xff);
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addWrite(0x10005+(i<<3),(loopPos>>8)&0xff);
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addWrite(0x10086+(i<<3),((sampleOffSegaPCM[chan[i].pcm.sample]>>16)<<3));
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}
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addWrite(0x10007+(i<<3),chan[i].pcm.freq);
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}
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}
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}
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chan[i].keyOn=false;
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chan[i].keyOff=false;
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}
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}
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}
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}
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void DivPlatformSegaPCM::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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}
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int DivPlatformSegaPCM::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 (skipRegisterWrites) break;
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if (ins->type==DIV_INS_AMIGA || ins->type==DIV_INS_SEGAPCM) {
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chan[c.chan].macroVolMul=(ins->type==DIV_INS_AMIGA)?64:127;
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chan[c.chan].isNewSegaPCM=(ins->type==DIV_INS_SEGAPCM);
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if (c.value!=DIV_NOTE_NULL) chan[c.chan].pcm.sample=ins->amiga.getSample(c.value);
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if (chan[c.chan].pcm.sample<0 || chan[c.chan].pcm.sample>=parent->song.sampleLen) {
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chan[c.chan].pcm.sample=-1;
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if (dumpWrites) {
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addWrite(0x10086+(c.chan<<3),3);
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}
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chan[c.chan].macroInit(NULL);
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if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
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chan[c.chan].outVol=chan[c.chan].vol;
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}
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break;
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}
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].note=c.value;
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chan[c.chan].baseFreq=(c.value<<6);
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chan[c.chan].freqChanged=true;
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}
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chan[c.chan].furnacePCM=true;
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chan[c.chan].macroInit(ins);
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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} else {
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chan[c.chan].macroInit(NULL);
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].note=c.value;
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}
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chan[c.chan].pcm.sample=12*sampleBank+chan[c.chan].note%12;
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if (chan[c.chan].pcm.sample>=parent->song.sampleLen) {
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chan[c.chan].pcm.sample=-1;
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if (dumpWrites) {
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addWrite(0x10086+(c.chan<<3),3);
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}
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break;
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}
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chan[c.chan].pcm.freq=MIN(255,(parent->getSample(chan[c.chan].pcm.sample)->rate*255)/31250);
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chan[c.chan].furnacePCM=false;
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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}
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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].pcm.sample=-1;
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if (dumpWrites) {
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addWrite(0x10086+(c.chan<<3),3);
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}
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chan[c.chan].keyOff=true;
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chan[c.chan].keyOn=false;
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chan[c.chan].active=false;
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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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chan[c.chan].keyOff=true;
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chan[c.chan].keyOn=false;
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chan[c.chan].active=false;
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chan[c.chan].std.release();
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break;
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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_VOLUME: {
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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].outVol=c.value;
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}
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if (parent->song.newSegaPCM) {
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chan[c.chan].chVolL=(c.value*chan[c.chan].chPanL)/127;
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chan[c.chan].chVolR=(c.value*chan[c.chan].chPanR)/127;
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} else {
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chan[c.chan].chVolL=c.value;
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chan[c.chan].chVolR=c.value;
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}
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if (dumpWrites) {
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addWrite(0x10002+(c.chan<<3),chan[c.chan].chVolL);
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addWrite(0x10003+(c.chan<<3),chan[c.chan].chVolR);
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}
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break;
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}
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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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}
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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].insChanged=true;
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}
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chan[c.chan].ins=c.value;
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break;
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case DIV_CMD_PANNING: {
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if (parent->song.newSegaPCM) {
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chan[c.chan].chPanL=c.value>>1;
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chan[c.chan].chPanR=c.value2>>1;
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chan[c.chan].chVolL=(chan[c.chan].outVol*chan[c.chan].chPanL)/127;
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chan[c.chan].chVolR=(chan[c.chan].outVol*chan[c.chan].chPanR)/127;
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} else {
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chan[c.chan].chVolL=c.value>>1;
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chan[c.chan].chVolR=c.value2>>1;
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}
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if (dumpWrites) {
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addWrite(0x10002+(c.chan<<3),chan[c.chan].chVolL);
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addWrite(0x10003+(c.chan<<3),chan[c.chan].chVolR);
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}
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break;
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}
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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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}
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case DIV_CMD_NOTE_PORTA: {
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int destFreq=(c.value2<<6);
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int newFreq;
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bool return2=false;
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if (destFreq>chan[c.chan].baseFreq) {
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newFreq=chan[c.chan].baseFreq+c.value*4;
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if (newFreq>=destFreq) {
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newFreq=destFreq;
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return2=true;
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}
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} else {
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newFreq=chan[c.chan].baseFreq-c.value*4;
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if (newFreq<=destFreq) {
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newFreq=destFreq;
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return2=true;
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}
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}
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chan[c.chan].baseFreq=newFreq;
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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=(c.value<<6);
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chan[c.chan].freqChanged=true;
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break;
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}
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case DIV_CMD_SAMPLE_BANK:
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sampleBank=c.value;
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if (sampleBank>(parent->song.sample.size()/12)) {
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sampleBank=parent->song.sample.size()/12;
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}
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break;
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case DIV_CMD_MACRO_OFF:
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chan[c.chan].std.mask(c.value,true);
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break;
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case DIV_CMD_MACRO_ON:
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chan[c.chan].std.mask(c.value,false);
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break;
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case DIV_ALWAYS_SET_VOLUME:
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return 0;
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break;
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case DIV_CMD_GET_VOLMAX:
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return 127;
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break;
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case DIV_CMD_PRE_PORTA:
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if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will && !NEW_ARP_STRAT) chan[c.chan].baseFreq=(chan[c.chan].note<<6);
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chan[c.chan].inPorta=c.value;
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break;
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case DIV_CMD_PRE_NOTE:
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break;
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case DIV_CMD_SAMPLE_FREQ:
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chan[c.chan].pcm.freq=c.value;
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if (dumpWrites) {
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addWrite(0x10007+(c.chan<<3),chan[c.chan].pcm.freq);
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}
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break;
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default:
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//printf("WARNING: unimplemented command %d\n",c.cmd);
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break;
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}
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return 1;
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}
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void DivPlatformSegaPCM::forceIns() {
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for (int i=0; i<16; i++) {
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chan[i].insChanged=true;
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}
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}
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void DivPlatformSegaPCM::notifyInsChange(int ins) {
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for (int i=0; i<16; i++) {
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if (chan[i].ins==ins) {
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chan[i].insChanged=true;
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}
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}
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}
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void* DivPlatformSegaPCM::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformSegaPCM::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivDispatchOscBuffer* DivPlatformSegaPCM::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformSegaPCM::getRegisterPool() {
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return regPool;
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}
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int DivPlatformSegaPCM::getRegisterPoolSize() {
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return 256;
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}
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void DivPlatformSegaPCM::poke(unsigned int addr, unsigned short val) {
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//immWrite(addr,val);
|
|
}
|
|
|
|
void DivPlatformSegaPCM::poke(std::vector<DivRegWrite>& wlist) {
|
|
//for (DivRegWrite& i: wlist) immWrite(i.addr,i.val);
|
|
}
|
|
|
|
void DivPlatformSegaPCM::reset() {
|
|
while (!writes.empty()) writes.pop();
|
|
memset(regPool,0,256);
|
|
for (int i=0; i<16; i++) {
|
|
chan[i]=DivPlatformSegaPCM::Channel();
|
|
chan[i].std.setEngine(parent);
|
|
chan[i].vol=0x7f;
|
|
chan[i].outVol=0x7f;
|
|
}
|
|
|
|
lastBusy=60;
|
|
pcmCycles=0;
|
|
pcmL=0;
|
|
pcmR=0;
|
|
sampleBank=0;
|
|
delay=0;
|
|
|
|
if (dumpWrites) {
|
|
for (int i=0; i<16; i++) {
|
|
addWrite(0x10086+(i<<3),3);
|
|
addWrite(0x10002+(i<<3),0x7f);
|
|
addWrite(0x10003+(i<<3),0x7f);
|
|
}
|
|
}
|
|
}
|
|
|
|
void DivPlatformSegaPCM::renderSamples(int sysID) {
|
|
size_t memPos=0;
|
|
|
|
for (int i=0; i<parent->song.sampleLen; i++) {
|
|
DivSample* sample=parent->getSample(i);
|
|
unsigned int alignedSize=(sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)+0xff)&(~0xff);
|
|
if (alignedSize>65536) alignedSize=65536;
|
|
if ((memPos&0xff0000)!=((memPos+alignedSize)&0xff0000)) {
|
|
memPos=(memPos+0xffff)&0xff0000;
|
|
}
|
|
logV("- sample %d will be at %x with length %x",i,memPos,alignedSize);
|
|
if (memPos>=16777216) break;
|
|
sampleOffSegaPCM[i]=memPos;
|
|
unsigned int readPos=0;
|
|
for (unsigned int j=0; j<alignedSize; j++) {
|
|
if (readPos>=(unsigned int)sample->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)) {
|
|
if (sample->isLoopable()) {
|
|
readPos=sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
|
|
memPos++;
|
|
} else {
|
|
memPos++;
|
|
}
|
|
} else {
|
|
memPos++;
|
|
}
|
|
readPos++;
|
|
if (memPos>=16777216) break;
|
|
}
|
|
sample->loopOffP=readPos-sample->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT);
|
|
if (memPos>=16777216) break;
|
|
}
|
|
}
|
|
|
|
void DivPlatformSegaPCM::setFlags(const DivConfig& flags) {
|
|
chipClock=8000000.0;
|
|
CHECK_CUSTOM_CLOCK;
|
|
rate=chipClock/256;
|
|
for (int i=0; i<16; i++) {
|
|
oscBuf[i]->rate=rate;
|
|
}
|
|
}
|
|
|
|
int DivPlatformSegaPCM::getOutputCount() {
|
|
return 2;
|
|
}
|
|
|
|
int DivPlatformSegaPCM::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
|
|
parent=p;
|
|
dumpWrites=false;
|
|
skipRegisterWrites=false;
|
|
for (int i=0; i<16; i++) {
|
|
isMuted[i]=false;
|
|
oscBuf[i]=new DivDispatchOscBuffer;
|
|
}
|
|
setFlags(flags);
|
|
reset();
|
|
|
|
return 16;
|
|
}
|
|
|
|
void DivPlatformSegaPCM::quit() {
|
|
for (int i=0; i<16; i++) {
|
|
delete oscBuf[i];
|
|
}
|
|
}
|
|
|
|
DivPlatformSegaPCM::~DivPlatformSegaPCM() {
|
|
}
|