556 lines
15 KiB
C++
556 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 "c64.h"
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#include "../engine.h"
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#include <math.h>
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#define rWrite(a,v) if (!skipRegisterWrites) {sid.write(a,v); regPool[(a)&0x1f]=v; if (dumpWrites) {addWrite(a,v);} }
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#define CHIP_FREQBASE 524288
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const char* regCheatSheetSID[]={
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"FreqL0", "00",
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"FreqH0", "01",
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"PWL0", "02",
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"PWH0", "03",
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"Control0", "04",
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"AtkDcy0", "05",
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"StnRis0", "06",
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"FreqL1", "07",
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"FreqH1", "08",
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"PWL1", "09",
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"PWH1", "0A",
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"Control1", "0B",
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"AtkDcy1", "0C",
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"StnRis1", "0D",
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"FreqL2", "0E",
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"FreqH2", "0F",
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"PWL2", "10",
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"PWH2", "11",
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"Control2", "12",
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"AtkDcy2", "13",
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"StnRis2", "14",
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"FCL", "15",
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"FCH", "16",
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"FilterRes", "17",
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"FilterMode", "18",
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"PotX", "19",
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"PotY", "1A",
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"Osc3", "1B",
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"Env3", "1C",
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NULL
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};
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const char** DivPlatformC64::getRegisterSheet() {
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return regCheatSheetSID;
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}
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const char* DivPlatformC64::getEffectName(unsigned char effect) {
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switch (effect) {
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case 0x10:
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return "10xx: Set waveform (bit 0: triangle; bit 1: saw; bit 2: pulse; bit 3: noise)";
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break;
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case 0x11:
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return "11xx: Set coarse cutoff (not recommended; use 4xxx instead)";
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break;
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case 0x12:
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return "12xx: Set coarse pulse width (not recommended; use 3xxx instead)";
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break;
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case 0x13:
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return "13xx: Set resonance (0 to F)";
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break;
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case 0x14:
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return "14xx: Set filter mode (bit 0: low pass; bit 1: band pass; bit 2: high pass)";
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break;
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case 0x15:
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return "15xx: Set envelope reset time";
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break;
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case 0x1a:
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return "1Axx: Disable envelope reset for this channel (1 disables; 0 enables)";
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break;
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case 0x1b:
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return "1Bxy: Reset cutoff (x: on new note; y: now)";
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break;
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case 0x1c:
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return "1Cxy: Reset pulse width (x: on new note; y: now)";
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break;
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case 0x1e:
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return "1Exy: Change additional parameters";
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break;
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case 0x30: case 0x31: case 0x32: case 0x33:
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case 0x34: case 0x35: case 0x36: case 0x37:
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case 0x38: case 0x39: case 0x3a: case 0x3b:
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case 0x3c: case 0x3d: case 0x3e: case 0x3f:
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return "3xxx: Set pulse width (0 to FFF)";
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break;
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case 0x40: case 0x41: case 0x42: case 0x43:
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case 0x44: case 0x45: case 0x46: case 0x47:
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return "4xxx: Set cutoff (0 to 7FF)";
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break;
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}
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return NULL;
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}
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void DivPlatformC64::acquire(short* bufL, short* bufR, size_t start, size_t len) {
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for (size_t i=start; i<start+len; i++) {
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sid.clock();
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bufL[i]=sid.output();
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}
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}
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void DivPlatformC64::updateFilter() {
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rWrite(0x15,filtCut&7);
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rWrite(0x16,filtCut>>3);
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rWrite(0x17,(filtRes<<4)|(chan[2].filter<<2)|(chan[1].filter<<1)|(int)(chan[0].filter));
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rWrite(0x18,(filtControl<<4)|vol);
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}
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void DivPlatformC64::tick(bool sysTick) {
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for (int i=0; i<3; i++) {
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chan[i].std.next();
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if (chan[i].std.vol.had) {
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DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_C64);
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if (ins->c64.volIsCutoff) {
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if (ins->c64.filterIsAbs) {
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filtCut=MIN(2047,chan[i].std.vol.val);
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} else {
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filtCut-=((signed char)chan[i].std.vol.val)*7;
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if (filtCut>2047) filtCut=2047;
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if (filtCut<0) filtCut=0;
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}
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updateFilter();
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} else {
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vol=MIN(15,chan[i].std.vol.val);
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updateFilter();
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}
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}
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if (chan[i].std.arp.had) {
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if (!chan[i].inPorta) {
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if (chan[i].std.arp.mode) {
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chan[i].baseFreq=NOTE_FREQUENCY(chan[i].std.arp.val);
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} else {
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chan[i].baseFreq=NOTE_FREQUENCY(chan[i].note+(signed char)chan[i].std.arp.val);
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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.arp.mode && chan[i].std.arp.finished) {
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chan[i].baseFreq=NOTE_FREQUENCY(chan[i].note);
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chan[i].freqChanged=true;
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}
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}
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if (chan[i].std.duty.had) {
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DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_C64);
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if (ins->c64.dutyIsAbs) {
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chan[i].duty=chan[i].std.duty.val;
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} else {
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chan[i].duty-=((signed char)chan[i].std.duty.val)*4;
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}
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rWrite(i*7+2,chan[i].duty&0xff);
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rWrite(i*7+3,chan[i].duty>>8);
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}
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if (sysTick) {
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if (chan[i].testWhen>0) {
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if (--chan[i].testWhen<1) {
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if (!chan[i].resetMask && !chan[i].inPorta) {
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rWrite(i*7+5,0);
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rWrite(i*7+6,0);
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rWrite(i*7+4,(chan[i].wave<<4)|8|(chan[i].ring<<2)|(chan[i].sync<<1));
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}
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}
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}
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}
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if (chan[i].std.wave.had) {
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chan[i].wave=chan[i].std.wave.val;
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rWrite(i*7+4,(chan[i].wave<<4)|(chan[i].ring<<2)|(chan[i].sync<<1)|(int)(chan[i].active));
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}
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if (chan[i].std.pitch.had) {
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chan[i].freqChanged=true;
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}
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if (chan[i].std.ex1.had) {
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filtControl=chan[i].std.ex1.val&15;
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updateFilter();
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}
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if (chan[i].std.ex2.had) {
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filtRes=chan[i].std.ex2.val&15;
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updateFilter();
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}
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if (chan[i].std.ex3.had) {
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chan[i].sync=chan[i].std.ex3.val&1;
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chan[i].ring=chan[i].std.ex3.val&2;
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chan[i].freqChanged=true;
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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=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,8)+chan[i].std.pitch.val;
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if (chan[i].freq>0xffff) chan[i].freq=0xffff;
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if (chan[i].keyOn) {
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rWrite(i*7+5,(chan[i].attack<<4)|(chan[i].decay));
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rWrite(i*7+6,(chan[i].sustain<<4)|(chan[i].release));
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rWrite(i*7+4,(chan[i].wave<<4)|(chan[i].ring<<2)|(chan[i].sync<<1)|1);
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}
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if (chan[i].keyOff) {
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rWrite(i*7+5,(chan[i].attack<<4)|(chan[i].decay));
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rWrite(i*7+6,(chan[i].sustain<<4)|(chan[i].release));
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rWrite(i*7+4,(chan[i].wave<<4)|(chan[i].ring<<2)|(chan[i].sync<<1)|0);
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}
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rWrite(i*7,chan[i].freq&0xff);
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rWrite(i*7+1,chan[i].freq>>8);
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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 DivPlatformC64::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_C64);
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=NOTE_FREQUENCY(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].keyOn=true;
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if (chan[c.chan].insChanged || chan[c.chan].resetDuty || ins->std.waveMacro.len>0) {
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chan[c.chan].duty=ins->c64.duty;
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rWrite(c.chan*7+2,chan[c.chan].duty&0xff);
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rWrite(c.chan*7+3,chan[c.chan].duty>>8);
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}
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if (chan[c.chan].insChanged) {
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chan[c.chan].wave=(ins->c64.noiseOn<<3)|(ins->c64.pulseOn<<2)|(ins->c64.sawOn<<1)|(int)(ins->c64.triOn);
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chan[c.chan].attack=ins->c64.a;
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chan[c.chan].decay=(ins->c64.s==15)?0:ins->c64.d;
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chan[c.chan].sustain=ins->c64.s;
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chan[c.chan].release=ins->c64.r;
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chan[c.chan].ring=ins->c64.ringMod;
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chan[c.chan].sync=ins->c64.oscSync;
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}
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if (chan[c.chan].insChanged || chan[c.chan].resetFilter) {
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chan[c.chan].filter=ins->c64.toFilter;
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if (ins->c64.initFilter) {
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filtCut=ins->c64.cut;
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filtRes=ins->c64.res;
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filtControl=(int)(ins->c64.lp)|(ins->c64.bp<<1)|(ins->c64.hp<<2)|(ins->c64.ch3off<<3);
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}
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updateFilter();
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}
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if (chan[c.chan].insChanged) {
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chan[c.chan].insChanged=false;
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}
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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].active=false;
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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].std.init(NULL);
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break;
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case DIV_CMD_NOTE_OFF_ENV:
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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].keyOn=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_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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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.vol.has) {
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chan[c.chan].outVol=c.value;
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vol=chan[c.chan].outVol;
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} else {
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vol=chan[c.chan].vol;
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}
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updateFilter();
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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_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_NOTE_PORTA: {
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int destFreq=NOTE_FREQUENCY(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].duty=(c.value*4095)/100;
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rWrite(c.chan*7+2,chan[c.chan].duty&0xff);
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rWrite(c.chan*7+3,chan[c.chan].duty>>8);
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break;
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case DIV_CMD_C64_FINE_DUTY:
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chan[c.chan].duty=c.value;
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rWrite(c.chan*7+2,chan[c.chan].duty&0xff);
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rWrite(c.chan*7+3,chan[c.chan].duty>>8);
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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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rWrite(c.chan*7+4,(chan[c.chan].wave<<4)|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|(int)(chan[c.chan].active));
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break;
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case DIV_CMD_LEGATO:
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chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value+((chan[c.chan].std.arp.will && !chan[c.chan].std.arp.mode)?(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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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].inPorta) {
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chan[c.chan].std.init(parent->getIns(chan[c.chan].ins,DIV_INS_C64));
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chan[c.chan].keyOn=true;
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}
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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_PRE_NOTE:
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if (resetTime) chan[c.chan].testWhen=c.value-resetTime+1;
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break;
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case DIV_CMD_GET_VOLMAX:
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return 15;
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break;
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case DIV_CMD_C64_CUTOFF:
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if (c.value>100) c.value=100;
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filtCut=c.value*2047/100;
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updateFilter();
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break;
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case DIV_CMD_C64_FINE_CUTOFF:
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filtCut=c.value;
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updateFilter();
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break;
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case DIV_CMD_C64_RESONANCE:
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if (c.value>15) c.value=15;
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filtRes=c.value;
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updateFilter();
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break;
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case DIV_CMD_C64_FILTER_MODE:
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filtControl=c.value&7;
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updateFilter();
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break;
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case DIV_CMD_C64_RESET_TIME:
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resetTime=c.value;
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break;
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case DIV_CMD_C64_RESET_MASK:
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chan[c.chan].resetMask=c.value;
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break;
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case DIV_CMD_C64_FILTER_RESET:
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if (c.value&15) {
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DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_C64);
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if (ins->c64.initFilter) {
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filtCut=ins->c64.cut;
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updateFilter();
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}
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}
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chan[c.chan].resetFilter=c.value>>4;
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break;
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case DIV_CMD_C64_DUTY_RESET:
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if (c.value&15) {
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DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_C64);
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chan[c.chan].duty=ins->c64.duty;
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rWrite(c.chan*7+2,chan[c.chan].duty&0xff);
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rWrite(c.chan*7+3,chan[c.chan].duty>>8);
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}
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chan[c.chan].resetDuty=c.value>>4;
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break;
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case DIV_CMD_C64_EXTENDED:
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switch (c.value>>4) {
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case 0:
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chan[c.chan].attack=c.value&15;
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break;
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case 1:
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chan[c.chan].decay=c.value&15;
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break;
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case 2:
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chan[c.chan].sustain=c.value&15;
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break;
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case 3:
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chan[c.chan].release=c.value&15;
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break;
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case 4:
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chan[c.chan].ring=c.value;
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rWrite(c.chan*7+4,(chan[c.chan].wave<<4)|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|(int)(chan[c.chan].active));
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break;
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case 5:
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chan[c.chan].sync=c.value;
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rWrite(c.chan*7+4,(chan[c.chan].wave<<4)|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|(int)(chan[c.chan].active));
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break;
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case 6:
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filtControl&=7;
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filtControl|=(!!c.value)<<3;
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break;
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}
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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 DivPlatformC64::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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sid.set_is_muted(ch,mute);
|
|
}
|
|
|
|
void DivPlatformC64::forceIns() {
|
|
for (int i=0; i<3; i++) {
|
|
chan[i].insChanged=true;
|
|
chan[i].testWhen=0;
|
|
if (chan[i].active) {
|
|
chan[i].keyOn=true;
|
|
chan[i].freqChanged=true;
|
|
}
|
|
}
|
|
updateFilter();
|
|
}
|
|
|
|
void DivPlatformC64::notifyInsChange(int ins) {
|
|
for (int i=0; i<3; i++) {
|
|
if (chan[i].ins==ins) {
|
|
chan[i].insChanged=true;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DivPlatformC64::notifyInsDeletion(void* ins) {
|
|
for (int i=0; i<3; i++) {
|
|
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
|
|
}
|
|
}
|
|
|
|
void* DivPlatformC64::getChanState(int ch) {
|
|
return &chan[ch];
|
|
}
|
|
|
|
unsigned char* DivPlatformC64::getRegisterPool() {
|
|
return regPool;
|
|
}
|
|
|
|
int DivPlatformC64::getRegisterPoolSize() {
|
|
return 32;
|
|
}
|
|
|
|
bool DivPlatformC64::getDCOffRequired() {
|
|
return true;
|
|
}
|
|
|
|
void DivPlatformC64::reset() {
|
|
for (int i=0; i<3; i++) {
|
|
chan[i]=DivPlatformC64::Channel();
|
|
chan[i].std.setEngine(parent);
|
|
}
|
|
|
|
sid.reset();
|
|
memset(regPool,0,32);
|
|
|
|
rWrite(0x18,0x0f);
|
|
|
|
filtControl=7;
|
|
filtRes=0;
|
|
filtCut=2047;
|
|
resetTime=1;
|
|
vol=15;
|
|
}
|
|
|
|
void DivPlatformC64::poke(unsigned int addr, unsigned short val) {
|
|
rWrite(addr,val);
|
|
}
|
|
|
|
void DivPlatformC64::poke(std::vector<DivRegWrite>& wlist) {
|
|
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
|
|
}
|
|
|
|
void DivPlatformC64::setChipModel(bool is6581) {
|
|
if (is6581) {
|
|
sid.set_chip_model(MOS6581);
|
|
} else {
|
|
sid.set_chip_model(MOS8580);
|
|
}
|
|
}
|
|
|
|
void DivPlatformC64::setFlags(unsigned int flags) {
|
|
switch (flags&0xf) {
|
|
case 0x0: // NTSC C64
|
|
rate=COLOR_NTSC*2.0/7.0;
|
|
break;
|
|
case 0x1: // PAL C64
|
|
rate=COLOR_PAL*2.0/9.0;
|
|
break;
|
|
case 0x2: // SSI 2001
|
|
default:
|
|
rate=14318180.0/16.0;
|
|
break;
|
|
}
|
|
chipClock=rate;
|
|
}
|
|
|
|
int DivPlatformC64::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
|
|
parent=p;
|
|
dumpWrites=false;
|
|
skipRegisterWrites=false;
|
|
for (int i=0; i<3; i++) {
|
|
isMuted[i]=false;
|
|
}
|
|
setFlags(flags);
|
|
|
|
reset();
|
|
|
|
return 3;
|
|
}
|
|
|
|
void DivPlatformC64::quit() {
|
|
}
|
|
|
|
DivPlatformC64::~DivPlatformC64() {
|
|
}
|