533 lines
15 KiB
C++
533 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 "nes.h"
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#include "sound/nes/cpu_inline.h"
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#include "../engine.h"
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#include <cstddef>
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#include <math.h>
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#define CHIP_DIVIDER 16
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#define rWrite(a,v) if (!skipRegisterWrites) {apu_wr_reg(nes,a,v); regPool[(a)&0x7f]=v; if (dumpWrites) {addWrite(a,v);} }
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const char* regCheatSheetNES[]={
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"S0Volume", "4000",
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"S0Sweep", "4001",
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"S0PeriodL", "4002",
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"S0PeriodH", "4003",
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"S1Volume", "4004",
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"S1Sweep", "4005",
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"S1PeriodL", "4006",
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"S1PeriodH", "4007",
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"TRVolume", "4008",
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"TRPeriodL", "400A",
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"TRPeriodH", "400B",
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"NSVolume", "400C",
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"NSPeriod", "400E",
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"NSLength", "400F",
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"DMCControl", "4010",
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"DMCLoad", "4011",
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"DMCAddr", "4012",
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"DMCLength", "4013",
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"APUControl", "4015",
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"APUFrameCtl", "4017",
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NULL
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};
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const char** DivPlatformNES::getRegisterSheet() {
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return regCheatSheetNES;
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}
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const char* DivPlatformNES::getEffectName(unsigned char effect) {
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switch (effect) {
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case 0x12:
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return "12xx: Set duty cycle/noise mode (pulse: 0 to 3; noise: 0 or 1)";
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break;
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case 0x13:
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return "13xy: Sweep up (x: time; y: shift)";
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break;
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case 0x14:
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return "14xy: Sweep down (x: time; y: shift)";
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break;
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}
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return NULL;
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}
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void DivPlatformNES::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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if (dacSample!=-1) {
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dacPeriod+=dacRate;
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if (dacPeriod>=rate) {
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DivSample* s=parent->song.sample[dacSample];
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if (s->samples>0) {
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if (!isMuted[4]) {
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rWrite(0x4011,((unsigned char)s->data8[dacPos]+0x80)>>1);
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}
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if (++dacPos>=s->samples) {
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if (s->loopStart>=0 && s->loopStart<=(int)s->samples) {
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dacPos=s->loopStart;
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} else {
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dacSample=-1;
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}
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}
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dacPeriod-=rate;
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} else {
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dacSample=-1;
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}
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}
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}
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apu_tick(nes,NULL);
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nes->apu.odd_cycle=!nes->apu.odd_cycle;
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if (nes->apu.clocked) {
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nes->apu.clocked=false;
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}
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bufL[i]=(pulse_output(nes)+tnd_output(nes))*30;
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}
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}
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static unsigned char noiseTable[253]={
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4,
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15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4,
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15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4,
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3, 2, 1, 0, 11, 10, 9, 8, 7, 6, 5, 4,
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15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4,
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3, 2, 1, 0, 11, 10, 9, 8, 7, 6, 5, 4,
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15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4,
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3, 2, 1, 0, 11, 10, 9, 8, 7, 6, 5, 4,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
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15
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};
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void DivPlatformNES::tick() {
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for (int i=0; i<4; i++) {
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chan[i].std.next();
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if (chan[i].std.hadVol) {
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// ok, why are the volumes like that?
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chan[i].outVol=MIN(15,chan[i].std.vol)-(15-(chan[i].vol&15));
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if (chan[i].outVol<0) chan[i].outVol=0;
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if (i==2) { // triangle
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rWrite(0x4000+i*4,(chan[i].outVol==0)?0:255);
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chan[i].freqChanged=true;
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} else {
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rWrite(0x4000+i*4,0x30|chan[i].outVol|((chan[i].duty&3)<<6));
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}
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}
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if (chan[i].std.hadArp) {
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if (i==3) { // noise
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if (chan[i].std.arpMode) {
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chan[i].baseFreq=chan[i].std.arp;
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} else {
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chan[i].baseFreq=chan[i].note+chan[i].std.arp;
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}
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if (chan[i].baseFreq>255) chan[i].baseFreq=255;
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if (chan[i].baseFreq<0) chan[i].baseFreq=0;
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} else {
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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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} else {
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chan[i].baseFreq=NOTE_PERIODIC(chan[i].note+chan[i].std.arp);
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}
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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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chan[i].freqChanged=true;
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}
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}
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if (chan[i].std.hadDuty) {
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chan[i].duty=chan[i].std.duty;
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if (i==3) {
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if (parent->song.properNoiseLayout) {
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chan[i].duty&=1;
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} else if (chan[i].duty>1) {
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chan[i].duty=1;
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}
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}
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if (i!=2) {
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rWrite(0x4000+i*4,0x30|chan[i].outVol|((chan[i].duty&3)<<6));
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}
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if (i==3) { // noise
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chan[i].freqChanged=true;
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}
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}
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if (chan[i].sweepChanged) {
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chan[i].sweepChanged=false;
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if (i==0) {
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//rWrite(16+i*5,chan[i].sweep);
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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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if (i==3) { // noise
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int ntPos=chan[i].baseFreq;
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if (ntPos<0) ntPos=0;
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if (ntPos>252) ntPos=252;
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chan[i].freq=(parent->song.properNoiseLayout)?(15-(chan[i].baseFreq&15)):(noiseTable[ntPos]);
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} else {
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chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true)-1;
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if (chan[i].freq>2047) chan[i].freq=2047;
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}
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if (chan[i].keyOn) {
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//rWrite(16+i*5+1,((chan[i].duty&3)<<6)|(63-(ins->gb.soundLen&63)));
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//rWrite(16+i*5+2,((chan[i].vol<<4))|(ins->gb.envLen&7)|((ins->gb.envDir&1)<<3));
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}
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if (chan[i].keyOff) {
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//rWrite(16+i*5+2,8);
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if (i==2) { // triangle
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rWrite(0x4000+i*4,0x00);
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} else {
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rWrite(0x4000+i*4,0x30);
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}
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}
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if (i==3) { // noise
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rWrite(0x4002+i*4,(chan[i].duty<<7)|chan[i].freq);
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rWrite(0x4003+i*4,0xf0);
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} else {
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rWrite(0x4002+i*4,chan[i].freq&0xff);
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if ((chan[i].prevFreq>>8)!=(chan[i].freq>>8) || i==2) {
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rWrite(0x4003+i*4,0xf8|(chan[i].freq>>8));
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}
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if (chan[i].freq!=65535 && chan[i].freq!=0) {
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chan[i].prevFreq=chan[i].freq;
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}
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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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// PCM
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if (chan[4].freqChanged) {
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chan[4].freq=parent->calcFreq(chan[4].baseFreq,chan[4].pitch,false);
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if (chan[4].furnaceDac) {
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double off=1.0;
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if (dacSample>=0 && dacSample<parent->song.sampleLen) {
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DivSample* s=parent->song.sample[dacSample];
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off=(double)s->centerRate/8363.0;
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}
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dacRate=MIN(chan[4].freq*off,32000);
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if (dumpWrites) addWrite(0xffff0001,dacRate);
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}
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chan[4].freqChanged=false;
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}
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}
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int DivPlatformNES::dispatch(DivCommand c) {
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switch (c.cmd) {
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case DIV_CMD_NOTE_ON:
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if (c.chan==4) { // PCM
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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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dacSample=ins->amiga.initSample;
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if (dacSample<0 || dacSample>=parent->song.sampleLen) {
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dacSample=-1;
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if (dumpWrites) addWrite(0xffff0002,0);
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break;
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} else {
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if (dumpWrites) addWrite(0xffff0000,dacSample);
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}
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dacPos=0;
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dacPeriod=0;
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chan[c.chan].baseFreq=parent->song.tuning*pow(2.0f,((float)(c.value+3)/12.0f));
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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}
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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chan[c.chan].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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dacSample=12*sampleBank+chan[c.chan].note%12;
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if (dacSample>=parent->song.sampleLen) {
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dacSample=-1;
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if (dumpWrites) addWrite(0xffff0002,0);
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break;
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} else {
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if (dumpWrites) addWrite(0xffff0000,dacSample);
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}
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dacPos=0;
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dacPeriod=0;
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dacRate=parent->song.sample[dacSample]->rate;
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if (dumpWrites) addWrite(0xffff0001,dacRate);
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chan[c.chan].furnaceDac=false;
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}
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break;
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} else if (c.chan==3) { // noise
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=c.value;
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}
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} else {
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
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}
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}
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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}
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
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if (c.chan==2) {
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rWrite(0x4000+c.chan*4,0xff);
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} else {
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rWrite(0x4000+c.chan*4,0x30|chan[c.chan].vol|((chan[c.chan].duty&3)<<6));
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}
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break;
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case DIV_CMD_NOTE_OFF:
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if (c.chan==4) {
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dacSample=-1;
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if (dumpWrites) addWrite(0xffff0002,0);
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}
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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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}
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if (chan[c.chan].active) {
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if (c.chan==2) {
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rWrite(0x4000+c.chan*4,0xff);
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} else {
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rWrite(0x4000+c.chan*4,0x30|chan[c.chan].vol|((chan[c.chan].duty&3)<<6));
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}
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}
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}
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break;
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case DIV_CMD_GET_VOLUME:
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return chan[c.chan].vol;
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break;
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case DIV_CMD_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_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].duty=c.value;
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if (c.chan==3) { // noise
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chan[c.chan].freqChanged=true;
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}
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break;
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case DIV_CMD_NES_SWEEP:
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if (c.chan>1) break;
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if (c.value2==0) {
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chan[c.chan].sweep=0x08;
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} else {
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if (!c.value) { // down
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chan[c.chan].sweep=0x88|(c.value2&0x77);
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} else { // up
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chan[c.chan].sweep=0x80|(c.value2&0x77);
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}
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}
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rWrite(0x4001+(c.chan*4),chan[c.chan].sweep);
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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_LEGATO:
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if (c.chan==3) break;
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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 15;
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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 DivPlatformNES::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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nes->muted[ch]=mute;
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}
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void DivPlatformNES::forceIns() {
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for (int i=0; i<5; i++) {
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chan[i].insChanged=true;
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chan[i].prevFreq=65535;
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}
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rWrite(0x4001,chan[0].sweep);
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rWrite(0x4005,chan[1].sweep);
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}
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void* DivPlatformNES::getChanState(int ch) {
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return &chan[ch];
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}
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unsigned char* DivPlatformNES::getRegisterPool() {
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return regPool;
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}
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int DivPlatformNES::getRegisterPoolSize() {
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return 32;
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}
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void DivPlatformNES::reset() {
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for (int i=0; i<5; i++) {
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|
chan[i]=DivPlatformNES::Channel();
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|
}
|
|
if (dumpWrites) {
|
|
addWrite(0xffffffff,0);
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|
}
|
|
|
|
dacPeriod=0;
|
|
dacPos=0;
|
|
dacRate=0;
|
|
dacSample=-1;
|
|
sampleBank=0;
|
|
|
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apu_turn_on(nes,apuType);
|
|
memset(regPool,0,128);
|
|
nes->apu.cpu_cycles=0;
|
|
nes->apu.cpu_opcode_cycle=0;
|
|
|
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rWrite(0x4015,0x1f);
|
|
rWrite(0x4001,chan[0].sweep);
|
|
rWrite(0x4005,chan[1].sweep);
|
|
}
|
|
|
|
bool DivPlatformNES::keyOffAffectsArp(int ch) {
|
|
return true;
|
|
}
|
|
|
|
void DivPlatformNES::setFlags(unsigned int flags) {
|
|
if (flags==2) { // Dendy
|
|
rate=COLOR_PAL*2.0/5.0;
|
|
apuType=2;
|
|
nes->apu.type=apuType;
|
|
} else if (flags==1) { // PAL
|
|
rate=COLOR_PAL*3.0/8.0;
|
|
apuType=1;
|
|
nes->apu.type=apuType;
|
|
} else { // NTSC
|
|
rate=COLOR_NTSC/2.0;
|
|
apuType=0;
|
|
nes->apu.type=apuType;
|
|
}
|
|
chipClock=rate;
|
|
}
|
|
|
|
void DivPlatformNES::notifyInsDeletion(void* ins) {
|
|
for (int i=0; i<5; i++) {
|
|
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
|
|
}
|
|
}
|
|
|
|
void DivPlatformNES::poke(unsigned int addr, unsigned short val) {
|
|
rWrite(addr,val);
|
|
}
|
|
|
|
void DivPlatformNES::poke(std::vector<DivRegWrite>& wlist) {
|
|
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
|
|
}
|
|
|
|
int DivPlatformNES::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
|
|
parent=p;
|
|
apuType=flags;
|
|
dumpWrites=false;
|
|
skipRegisterWrites=false;
|
|
nes=new struct NESAPU;
|
|
for (int i=0; i<5; i++) {
|
|
isMuted[i]=false;
|
|
nes->muted[i]=false;
|
|
}
|
|
setFlags(flags);
|
|
|
|
init_nla_table(500,500);
|
|
reset();
|
|
return 5;
|
|
}
|
|
|
|
void DivPlatformNES::quit() {
|
|
delete nes;
|
|
}
|
|
|
|
DivPlatformNES::~DivPlatformNES() {
|
|
}
|