540 lines
15 KiB
C++
540 lines
15 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 "pce.h"
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#include "../engine.h"
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#include <math.h>
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//#define rWrite(a,v) pendingWrites[a]=v;
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#define rWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
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#define chWrite(c,a,v) \
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if (!skipRegisterWrites) { \
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if (curChan!=c) { \
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curChan=c; \
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rWrite(0,curChan); \
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} \
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regPool[16+((c)<<4)+((a)&0x0f)]=v; \
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rWrite(a,v); \
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}
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#define CHIP_DIVIDER 32
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const char* regCheatSheetPCE[]={
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"Select", "0",
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"MasterVol", "1",
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"FreqL", "2",
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"FreqH", "3",
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"DataCtl", "4",
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"ChanVol", "5",
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"WaveCtl", "6",
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"NoiseCtl", "7",
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"LFOFreq", "8",
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"LFOCtl", "9",
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NULL
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};
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const char** DivPlatformPCE::getRegisterSheet() {
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return regCheatSheetPCE;
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}
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const char* DivPlatformPCE::getEffectName(unsigned char effect) {
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switch (effect) {
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case 0x10:
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return "10xx: Change waveform";
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break;
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case 0x11:
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return "11xx: Toggle noise mode";
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break;
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case 0x12:
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return "12xx: Setup LFO (0: disabled; 1: 1x depth; 2: 16x depth; 3: 256x depth)";
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break;
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case 0x13:
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return "13xx: Set LFO speed";
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break;
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case 0x17:
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return "17xx: Toggle PCM mode";
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break;
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}
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return NULL;
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}
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void DivPlatformPCE::acquire(short* bufL, short* bufR, size_t start, size_t len) {
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for (size_t h=start; h<start+len; h++) {
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// PCM part
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for (int i=0; i<6; i++) {
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if (chan[i].pcm && chan[i].dacSample!=-1) {
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chan[i].dacPeriod+=chan[i].dacRate;
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if (chan[i].dacPeriod>rate) {
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DivSample* s=parent->song.sample[chan[i].dacSample];
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if (s->samples<=0) {
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chan[i].dacSample=-1;
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continue;
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}
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chWrite(i,0x07,0);
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chWrite(i,0x04,0xdf);
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chWrite(i,0x06,(((unsigned char)s->data8[chan[i].dacPos]+0x80)>>3));
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chan[i].dacPos++;
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if (chan[i].dacPos>=s->samples) {
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if (s->loopStart>=0 && s->loopStart<=(int)s->samples) {
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chan[i].dacPos=s->loopStart;
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} else {
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chan[i].dacSample=-1;
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}
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}
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chan[i].dacPeriod-=rate;
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}
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}
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}
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// PCE part
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cycles=0;
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while (!writes.empty() && cycles<24) {
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QueuedWrite w=writes.front();
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pce->Write(cycles,w.addr,w.val);
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regPool[w.addr&0x0f]=w.val;
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//cycles+=2;
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writes.pop();
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}
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memset(tempL,0,24*sizeof(int));
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memset(tempR,0,24*sizeof(int));
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pce->Update(24);
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pce->ResetTS(0);
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tempL[0]=(tempL[0]>>1)+(tempL[0]>>2);
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tempR[0]=(tempR[0]>>1)+(tempR[0]>>2);
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if (tempL[0]<-32768) tempL[0]=-32768;
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if (tempL[0]>32767) tempL[0]=32767;
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if (tempR[0]<-32768) tempR[0]=-32768;
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if (tempR[0]>32767) tempR[0]=32767;
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//printf("tempL: %d tempR: %d\n",tempL,tempR);
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bufL[h]=tempL[0];
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bufR[h]=tempR[0];
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}
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}
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void DivPlatformPCE::updateWave(int ch) {
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DivWavetable* wt=parent->getWave(chan[ch].wave);
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chWrite(ch,0x04,0x5f);
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chWrite(ch,0x04,0x1f);
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for (int i=0; i<32; i++) {
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if (wt->max<1 || wt->len<1) {
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chWrite(ch,0x06,0);
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} else {
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chWrite(ch,0x06,wt->data[i*wt->len/32]*31/wt->max);
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}
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}
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if (chan[ch].active) {
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chWrite(ch,0x04,0x80|chan[ch].outVol);
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}
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}
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// TODO: in octave 6 the noise table changes to a tonal one
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static unsigned char noiseFreq[12]={
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4,13,15,18,21,23,25,27,29,31,0,2
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};
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void DivPlatformPCE::tick() {
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for (int i=0; i<6; i++) {
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chan[i].std.next();
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if (chan[i].std.hadVol) {
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chan[i].outVol=((chan[i].vol&31)*MIN(31,chan[i].std.vol))>>5;
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if (chan[i].furnaceDac) {
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// ignore for now
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} else {
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chWrite(i,0x04,0x80|chan[i].outVol);
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}
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}
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if (chan[i].std.hadArp) {
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if (!chan[i].inPorta) {
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if (chan[i].std.arpMode) {
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chan[i].baseFreq=NOTE_PERIODIC(chan[i].std.arp);
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// noise
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int noiseSeek=chan[i].std.arp;
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if (noiseSeek<0) noiseSeek=0;
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chWrite(i,0x07,chan[i].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
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} else {
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chan[i].baseFreq=NOTE_PERIODIC(chan[i].note+chan[i].std.arp);
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int noiseSeek=chan[i].note+chan[i].std.arp;
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if (noiseSeek<0) noiseSeek=0;
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chWrite(i,0x07,chan[i].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
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}
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}
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chan[i].freqChanged=true;
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} else {
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if (chan[i].std.arpMode && chan[i].std.finishedArp) {
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chan[i].baseFreq=NOTE_PERIODIC(chan[i].note);
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int noiseSeek=chan[i].note;
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if (noiseSeek<0) noiseSeek=0;
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chWrite(i,0x07,chan[i].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
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chan[i].freqChanged=true;
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}
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}
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if (chan[i].std.hadWave && !chan[i].pcm) {
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if (chan[i].wave!=chan[i].std.wave) {
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chan[i].wave=chan[i].std.wave;
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updateWave(i);
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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].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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//DivInstrument* ins=parent->getIns(chan[i].ins);
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chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true);
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if (chan[i].furnaceDac) {
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double off=1.0;
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if (chan[i].dacSample>=0 && chan[i].dacSample<parent->song.sampleLen) {
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DivSample* s=parent->song.sample[chan[i].dacSample];
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if (s->centerRate<1) {
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off=1.0;
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} else {
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off=8363.0/(double)s->centerRate;
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}
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}
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chan[i].dacRate=((double)chipClock/2)/MAX(1,off*chan[i].freq);
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if (dumpWrites) addWrite(0xffff0001+(i<<8),chan[i].dacRate);
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}
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if (chan[i].freq>4095) chan[i].freq=4095;
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if (chan[i].note>0x5d) chan[i].freq=0x01;
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chWrite(i,0x02,chan[i].freq&0xff);
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chWrite(i,0x03,chan[i].freq>>8);
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if (chan[i].keyOn) {
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if (chan[i].wave<0) {
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chan[i].wave=0;
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updateWave(i);
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}
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//rWrite(16+i*5,0x80);
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//chWrite(i,0x04,0x80|chan[i].vol);
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}
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if (chan[i].keyOff) {
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chWrite(i,0x04,0);
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}
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if (chan[i].keyOn) chan[i].keyOn=false;
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if (chan[i].keyOff) chan[i].keyOff=false;
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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 DivPlatformPCE::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);
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if (ins->type==DIV_INS_AMIGA) {
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chan[c.chan].pcm=true;
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} else if (chan[c.chan].furnaceDac) {
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chan[c.chan].pcm=false;
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}
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if (chan[c.chan].pcm) {
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if (skipRegisterWrites) break;
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if (ins->type==DIV_INS_AMIGA) {
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chan[c.chan].dacSample=ins->amiga.initSample;
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if (chan[c.chan].dacSample<0 || chan[c.chan].dacSample>=parent->song.sampleLen) {
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chan[c.chan].dacSample=-1;
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if (dumpWrites) addWrite(0xffff0002+(c.chan<<8),0);
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break;
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} else {
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if (dumpWrites) {
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chWrite(c.chan,0x04,0xdf);
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addWrite(0xffff0000+(c.chan<<8),chan[c.chan].dacSample);
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}
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}
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chan[c.chan].dacPos=0;
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chan[c.chan].dacPeriod=0;
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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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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].std.init(ins);
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//chan[c.chan].keyOn=true;
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chan[c.chan].furnaceDac=true;
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} else {
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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].dacSample=12*sampleBank+chan[c.chan].note%12;
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if (chan[c.chan].dacSample>=parent->song.sampleLen) {
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chan[c.chan].dacSample=-1;
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if (dumpWrites) addWrite(0xffff0002+(c.chan<<8),0);
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break;
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} else {
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if (dumpWrites) addWrite(0xffff0000+(c.chan<<8),chan[c.chan].dacSample);
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}
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chan[c.chan].dacPos=0;
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chan[c.chan].dacPeriod=0;
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chan[c.chan].dacRate=parent->song.sample[chan[c.chan].dacSample]->rate;
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if (dumpWrites) {
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chWrite(c.chan,0x04,0xdf);
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addWrite(0xffff0001+(c.chan<<8),chan[c.chan].dacRate);
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}
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chan[c.chan].furnaceDac=false;
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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].baseFreq=NOTE_PERIODIC(c.value);
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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int noiseSeek=chan[c.chan].note;
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if (noiseSeek<0) noiseSeek=0;
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chWrite(c.chan,0x07,chan[c.chan].noise?(0x80|(parent->song.properNoiseLayout?(noiseSeek&31):noiseFreq[noiseSeek%12])):0);
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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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chWrite(c.chan,0x04,0x80|chan[c.chan].vol);
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chan[c.chan].std.init(ins);
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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].dacSample=-1;
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if (dumpWrites) addWrite(0xffff0002+(c.chan<<8),0);
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chan[c.chan].pcm=false;
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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].std.init(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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}
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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.hasVol) {
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chan[c.chan].outVol=c.value;
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if (chan[c.chan].active) chWrite(c.chan,0x04,0x80|chan[c.chan].outVol);
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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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if (chan[c.chan].std.hasVol) {
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return chan[c.chan].vol;
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}
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return chan[c.chan].outVol;
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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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chan[c.chan].wave=c.value;
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updateWave(c.chan);
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chan[c.chan].keyOn=true;
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break;
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case DIV_CMD_PCE_LFO_MODE:
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if (c.value==0) {
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lfoMode=0;
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} else {
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lfoMode=c.value;
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}
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rWrite(0x08,lfoSpeed);
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rWrite(0x09,lfoMode);
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break;
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case DIV_CMD_PCE_LFO_SPEED:
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lfoSpeed=255-c.value;
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rWrite(0x08,lfoSpeed);
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rWrite(0x09,lfoMode);
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break;
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case DIV_CMD_NOTE_PORTA: {
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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_STD_NOISE_MODE:
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chan[c.chan].noise=c.value;
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chWrite(c.chan,0x07,chan[c.chan].noise?(0x80|chan[c.chan].note):0);
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break;
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case DIV_CMD_SAMPLE_MODE:
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chan[c.chan].pcm=c.value;
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break;
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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_PANNING: {
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chan[c.chan].pan=c.value;
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chWrite(c.chan,0x05,isMuted[c.chan]?0:chan[c.chan].pan);
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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+((chan[c.chan].std.willArp && !chan[c.chan].std.arpMode)?(chan[c.chan].std.arp):(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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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].std.init(parent->getIns(chan[c.chan].ins));
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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_GET_VOLMAX:
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return 31;
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break;
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case DIV_ALWAYS_SET_VOLUME:
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return 1;
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break;
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default:
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break;
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}
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return 1;
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}
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void DivPlatformPCE::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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chWrite(ch,0x05,isMuted[ch]?0:chan[ch].pan);
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}
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void DivPlatformPCE::forceIns() {
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for (int i=0; i<6; i++) {
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chan[i].insChanged=true;
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chan[i].freqChanged=true;
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updateWave(i);
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chWrite(i,0x05,isMuted[i]?0:chan[i].pan);
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}
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}
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void* DivPlatformPCE::getChanState(int ch) {
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return &chan[ch];
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}
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unsigned char* DivPlatformPCE::getRegisterPool() {
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return regPool;
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}
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int DivPlatformPCE::getRegisterPoolSize() {
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return 112;
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}
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void DivPlatformPCE::reset() {
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while (!writes.empty()) writes.pop();
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memset(regPool,0,128);
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|
for (int i=0; i<6; i++) {
|
|
chan[i]=DivPlatformPCE::Channel();
|
|
}
|
|
if (dumpWrites) {
|
|
addWrite(0xffffffff,0);
|
|
}
|
|
pce->Power(0);
|
|
lastPan=0xff;
|
|
memset(tempL,0,32*sizeof(int));
|
|
memset(tempR,0,32*sizeof(int));
|
|
cycles=0;
|
|
curChan=-1;
|
|
sampleBank=0;
|
|
lfoMode=0;
|
|
lfoSpeed=255;
|
|
// set global volume
|
|
rWrite(0,0);
|
|
rWrite(0x01,0xff);
|
|
// set LFO
|
|
rWrite(0x08,lfoSpeed);
|
|
rWrite(0x09,lfoMode);
|
|
// set per-channel initial panning
|
|
for (int i=0; i<6; i++) {
|
|
chWrite(i,0x05,isMuted[i]?0:chan[i].pan);
|
|
}
|
|
delay=500;
|
|
}
|
|
|
|
bool DivPlatformPCE::isStereo() {
|
|
return true;
|
|
}
|
|
|
|
bool DivPlatformPCE::keyOffAffectsArp(int ch) {
|
|
return true;
|
|
}
|
|
|
|
void DivPlatformPCE::notifyWaveChange(int wave) {
|
|
for (int i=0; i<6; i++) {
|
|
if (chan[i].wave==wave) {
|
|
updateWave(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
void DivPlatformPCE::notifyInsDeletion(void* ins) {
|
|
for (int i=0; i<6; i++) {
|
|
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
|
|
}
|
|
}
|
|
|
|
void DivPlatformPCE::setFlags(unsigned int flags) {
|
|
if (flags&1) { // technically there is no PAL PC Engine but oh well...
|
|
chipClock=COLOR_PAL*4.0/5.0;
|
|
} else {
|
|
chipClock=COLOR_NTSC;
|
|
}
|
|
rate=chipClock/12;
|
|
}
|
|
|
|
void DivPlatformPCE::poke(unsigned int addr, unsigned short val) {
|
|
rWrite(addr,val);
|
|
}
|
|
|
|
void DivPlatformPCE::poke(std::vector<DivRegWrite>& wlist) {
|
|
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
|
|
}
|
|
|
|
int DivPlatformPCE::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
|
|
parent=p;
|
|
dumpWrites=false;
|
|
skipRegisterWrites=false;
|
|
for (int i=0; i<6; i++) {
|
|
isMuted[i]=false;
|
|
}
|
|
setFlags(flags);
|
|
pce=new PCE_PSG(tempL,tempR,PCE_PSG::REVISION_HUC6280A);
|
|
reset();
|
|
return 6;
|
|
}
|
|
|
|
void DivPlatformPCE::quit() {
|
|
delete pce;
|
|
}
|
|
|
|
DivPlatformPCE::~DivPlatformPCE() {
|
|
}
|