416 lines
10 KiB
C++
416 lines
10 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 "scc.h"
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#include "../engine.h"
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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) {scc->scc_w(true,a,v); regPool[a]=v; if (dumpWrites) addWrite(a,v); }}
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const char* regCheatSheetSCC[]={
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"Ch1_Wave", "00",
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"Ch2_Wave", "20",
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"Ch3_Wave", "40",
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"Ch4_5_Wave", "60",
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"Ch1_FreqL", "80",
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"Ch1_FreqH", "81",
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"Ch2_FreqL", "82",
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"Ch2_FreqH", "83",
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"Ch3_FreqL", "84",
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"Ch3_FreqH", "85",
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"Ch4_FreqL", "86",
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"Ch4_FreqH", "87",
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"Ch5_FreqL", "88",
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"Ch5_FreqH", "89",
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"Ch1_Vol", "8a",
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"Ch2_Vol", "8b",
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"Ch3_Vol", "8c",
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"Ch4_Vol", "8d",
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"Ch5_Vol", "8e",
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"Output", "8f",
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"Test", "e0",
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NULL
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};
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const char* regCheatSheetSCCPlus[]={
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"Ch1_Wave", "00",
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"Ch2_Wave", "20",
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"Ch3_Wave", "40",
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"Ch4_Wave", "60",
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"Ch5_Wave", "80",
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"Ch1_FreqL", "a0",
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"Ch1_FreqH", "a1",
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"Ch2_FreqL", "a2",
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"Ch2_FreqH", "a3",
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"Ch3_FreqL", "a4",
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"Ch3_FreqH", "a5",
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"Ch4_FreqL", "a6",
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"Ch4_FreqH", "a7",
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"Ch5_FreqL", "a8",
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"Ch5_FreqH", "a9",
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"Ch1_Vol", "aa",
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"Ch2_Vol", "ab",
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"Ch3_Vol", "ac",
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"Ch4_Vol", "ad",
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"Ch5_Vol", "ae",
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"Output", "af",
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"Test", "c0",
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NULL
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};
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const char** DivPlatformSCC::getRegisterSheet() {
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return isPlus ? regCheatSheetSCCPlus : regCheatSheetSCC;
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}
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void DivPlatformSCC::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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for (int i=0; i<16; i++) {
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scc->tick();
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}
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short out=(short)scc->out()<<5;
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bufL[h]=bufR[h]=out;
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for (int i=0; i<5; i++) {
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oscBuf[i]->data[oscBuf[i]->needle++]=scc->voice_out(i)<<7;
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}
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}
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}
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void DivPlatformSCC::updateWave(int ch) {
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int dstCh=(!isPlus && ch>=4)?3:ch;
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if (ch==3) {
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lastUpdated34=3;
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} else if (ch==4) {
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lastUpdated34=4;
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}
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for (int i=0; i<32; i++) {
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rWrite(dstCh*32+i,(unsigned char)chan[ch].ws.output[i]-128);
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}
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}
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void DivPlatformSCC::tick(bool sysTick) {
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for (int i=0; i<5; i++) {
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chan[i].std.next();
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if (chan[i].std.vol.had) {
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chan[i].outVol=((chan[i].vol&15)*MIN(15,chan[i].std.vol.val))/15;
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rWrite(regBase+10+i,chan[i].outVol);
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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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chan[i].baseFreq=NOTE_PERIODIC(parent->calcArp(chan[i].note,chan[i].std.arp.val));
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].std.wave.had) {
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if (chan[i].wave!=chan[i].std.wave.val || chan[i].ws.activeChanged()) {
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chan[i].wave=chan[i].std.wave.val;
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chan[i].ws.changeWave1(chan[i].wave);
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}
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}
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if (chan[i].std.pitch.had) {
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if (chan[i].std.pitch.mode) {
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chan[i].pitch2+=chan[i].std.pitch.val;
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CLAMP_VAR(chan[i].pitch2,-32768,32767);
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} else {
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chan[i].pitch2=chan[i].std.pitch.val;
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].active) {
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if (chan[i].ws.tick()) {
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updateWave(i);
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}
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}
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if (chan[i].freqChanged) {
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chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER)-1;
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if (chan[i].freq<0) chan[i].freq=0;
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if (chan[i].freq>4095) chan[i].freq=4095;
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if (!chan[i].freqInit || regPool[regBase+0+i*2]!=(chan[i].freq&0xff)) {
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rWrite(regBase+0+i*2,chan[i].freq&0xff);
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}
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if (!chan[i].freqInit || regPool[regBase+1+i*2]!=(chan[i].freq>>8)) {
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rWrite(regBase+1+i*2,chan[i].freq>>8);
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}
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chan[i].freqChanged=false;
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chan[i].freqInit=!skipRegisterWrites;
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}
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}
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}
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int DivPlatformSCC::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_SCC);
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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].macroInit(ins);
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if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
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chan[c.chan].outVol=chan[c.chan].vol;
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}
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if (!isMuted[c.chan]) {
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rWrite(regBase+15,regPool[regBase+15]|(1<<c.chan));
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}
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if (chan[c.chan].wave<0) {
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chan[c.chan].wave=0;
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chan[c.chan].ws.changeWave1(chan[c.chan].wave);
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}
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chan[c.chan].ws.init(ins,32,255,chan[c.chan].insChanged);
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chan[c.chan].insChanged=false;
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break;
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}
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case DIV_CMD_NOTE_OFF:
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chan[c.chan].active=false;
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chan[c.chan].macroInit(NULL);
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rWrite(regBase+15,regPool[regBase+15]&~(1<<c.chan));
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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.vol.has) {
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chan[c.chan].outVol=c.value;
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rWrite(regBase+10+c.chan,c.value);
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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.vol.has) {
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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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chan[c.chan].ws.changeWave1(chan[c.chan].wave);
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break;
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case DIV_CMD_NOTE_PORTA: {
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int destFreq=NOTE_PERIODIC(c.value2);
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bool return2=false;
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if (destFreq>chan[c.chan].baseFreq) {
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chan[c.chan].baseFreq+=c.value;
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if (chan[c.chan].baseFreq>=destFreq) {
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chan[c.chan].baseFreq=destFreq;
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return2=true;
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}
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} else {
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chan[c.chan].baseFreq-=c.value;
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if (chan[c.chan].baseFreq<=destFreq) {
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chan[c.chan].baseFreq=destFreq;
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return2=true;
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}
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}
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chan[c.chan].freqChanged=true;
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if (return2) {
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chan[c.chan].inPorta=false;
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return 2;
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}
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break;
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}
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case DIV_CMD_LEGATO:
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chan[c.chan].baseFreq=NOTE_PERIODIC(c.value+((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].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_SCC));
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}
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if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will) chan[c.chan].baseFreq=NOTE_PERIODIC(chan[c.chan].note);
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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 DivPlatformSCC::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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if (mute) {
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rWrite(regBase+15,regPool[regBase+15]&~(1<<ch));
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} else if (chan[ch].active) {
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rWrite(regBase+15,regPool[regBase+15]|(1<<ch));
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}
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}
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void DivPlatformSCC::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].freqChanged=true;
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chan[i].freqInit=false;
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if (isPlus || i<3) {
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updateWave(i);
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}
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}
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if (!isPlus) {
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if (lastUpdated34>=3) {
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updateWave(lastUpdated34);
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}
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}
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}
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void* DivPlatformSCC::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformSCC::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivDispatchOscBuffer* DivPlatformSCC::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformSCC::getRegisterPool() {
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return (unsigned char*)regPool;
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}
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int DivPlatformSCC::getRegisterPoolSize() {
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return 225;
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}
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void DivPlatformSCC::reset() {
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memset(regPool,0,225);
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scc->reset();
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for (int i=0; i<5; i++) {
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chan[i]=DivPlatformSCC::Channel();
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chan[i].std.setEngine(parent);
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chan[i].ws.setEngine(parent,128);
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chan[i].ws.init(NULL,32,255,false);
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chan[i].vol=15;
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chan[i].outVol=15;
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rWrite(regBase+10+i,15);
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}
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if (dumpWrites) {
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addWrite(0xffffffff,0);
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}
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lastUpdated34=0;
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}
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bool DivPlatformSCC::isStereo() {
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return false;
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}
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void DivPlatformSCC::notifyWaveChange(int wave) {
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for (int i=0; i<5; i++) {
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if (chan[i].wave==wave) {
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chan[i].ws.changeWave1(chan[i].wave);
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if (chan[i].active) {
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updateWave(i);
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}
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}
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}
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}
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void DivPlatformSCC::notifyInsDeletion(void* ins) {
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for (int i=0; i<5; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformSCC::poke(unsigned int addr, unsigned short val) {
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rWrite(addr,val);
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}
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void DivPlatformSCC::poke(std::vector<DivRegWrite>& wlist) {
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for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
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}
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void DivPlatformSCC::setChipModel(bool isplus) {
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isPlus=isplus;
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}
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void DivPlatformSCC::setFlags(unsigned int flags) {
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switch (flags&0x7f) {
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case 0x00:
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chipClock=COLOR_NTSC/2.0;
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break;
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case 0x01:
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chipClock=COLOR_PAL*2.0/5.0;
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break;
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case 0x02:
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chipClock=3000000.0/2.0;
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break;
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case 0x03:
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chipClock=4000000.0/2.0;
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break;
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}
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rate=chipClock/8;
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for (int i=0; i<5; i++) {
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oscBuf[i]->rate=rate;
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}
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}
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int DivPlatformSCC::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
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parent=p;
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dumpWrites=false;
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skipRegisterWrites=false;
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writeOscBuf=0;
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for (int i=0; i<5; i++) {
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isMuted[i]=false;
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oscBuf[i]=new DivDispatchOscBuffer;
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}
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setFlags(flags);
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if (isPlus) {
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scc=new k052539_scc_core;
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regBase=0xa0;
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} else {
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scc=new k051649_scc_core;
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regBase=0x80;
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}
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reset();
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return 5;
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}
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void DivPlatformSCC::quit() {
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for (int i=0; i<5; i++) {
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delete oscBuf[i];
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}
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if (scc!=NULL) {
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delete scc;
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}
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}
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DivPlatformSCC::~DivPlatformSCC() {
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}
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