mirror of
https://github.com/tildearrow/furnace.git
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480 lines
13 KiB
C++
480 lines
13 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 "saa.h"
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#include "../engine.h"
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#include "sound/saa1099.h"
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#include <string.h>
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#include <math.h>
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#define rWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
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#define CHIP_DIVIDER 2
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const char* regCheatSheetSAA[]={
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"Vol0", "00",
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"Vol1", "01",
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"Vol2", "02",
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"Vol3", "03",
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"Vol4", "04",
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"Vol5", "05",
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"Freq0", "08",
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"Freq1", "09",
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"Freq2", "0A",
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"Freq3", "0B",
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"Freq4", "0C",
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"Freq5", "0D",
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"Octave10", "10",
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"Octave32", "11",
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"Octave54", "12",
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"ToneOn", "14",
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"NoiseOn", "15",
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"NoiseCtl", "16",
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"EnvCtl0", "18",
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"EnvCtl1", "19",
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"Power", "1C",
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NULL
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};
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const char** DivPlatformSAA1099::getRegisterSheet() {
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return regCheatSheetSAA;
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}
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void DivPlatformSAA1099::acquire_saaSound(short* bufL, short* bufR, size_t start, size_t len) {
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if (saaBufLen<len*2) {
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saaBufLen=len*2;
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for (int i=0; i<2; i++) {
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delete[] saaBuf[i];
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saaBuf[i]=new short[saaBufLen];
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}
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}
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while (!writes.empty()) {
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QueuedWrite w=writes.front();
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saa_saaSound->WriteAddressData(w.addr,w.val);
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regPool[w.addr&0x1f]=w.val;
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writes.pop();
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}
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saa_saaSound->GenerateMany((unsigned char*)saaBuf[0],len,oscBuf);
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for (size_t i=0; i<len; i++) {
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bufL[i+start]=saaBuf[0][i<<1];
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bufR[i+start]=saaBuf[0][1+(i<<1)];
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}
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}
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void DivPlatformSAA1099::acquire(short* bufL, short* bufR, size_t start, size_t len) {
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acquire_saaSound(bufL,bufR,start,len);
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}
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inline unsigned char applyPan(unsigned char vol, unsigned char pan) {
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return ((vol*(pan>>4))/15)|(((vol*(pan&15))/15)<<4);
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}
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void DivPlatformSAA1099::tick(bool sysTick) {
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for (int i=0; i<6; i++) {
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chan[i].std.next();
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if (chan[i].std.vol.had) {
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chan[i].outVol=VOL_SCALE_LINEAR_BROKEN(chan[i].vol&15,MIN(15,chan[i].std.vol.val),15);
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if (chan[i].outVol<0) chan[i].outVol=0;
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if (isMuted[i]) {
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rWrite(i,0);
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} else {
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rWrite(i,applyPan(chan[i].outVol&15,chan[i].pan));
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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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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.duty.had) {
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saaNoise[i/3]=chan[i].std.duty.val&3;
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rWrite(0x16,saaNoise[0]|(saaNoise[1]<<4));
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}
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if (chan[i].std.wave.had) {
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chan[i].psgMode=chan[i].std.wave.val&3;
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}
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if (chan[i].std.panL.had) {
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chan[i].pan&=0x0f;
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chan[i].pan|=(chan[i].std.panL.val&15)<<4;
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}
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if (chan[i].std.panR.had) {
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chan[i].pan&=0xf0;
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chan[i].pan|=chan[i].std.panR.val&15;
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}
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if (chan[i].std.panL.had || chan[i].std.panR.had) {
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if (isMuted[i]) {
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rWrite(i,0);
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} else {
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if (chan[i].std.vol.had) {
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if (chan[i].active) rWrite(i,applyPan(chan[i].outVol&15,chan[i].pan));
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} else {
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if (chan[i].active) rWrite(i,applyPan(chan[i].vol&15,chan[i].pan));
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}
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}
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}
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if (chan[i].std.pitch.had) {
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if (chan[i].std.pitch.mode) {
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chan[i].pitch2+=chan[i].std.pitch.val;
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CLAMP_VAR(chan[i].pitch2,-32768,32767);
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} else {
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chan[i].pitch2=chan[i].std.pitch.val;
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].std.ex1.had) {
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saaEnv[i/3]=chan[i].std.ex1.val;
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rWrite(0x18+(i/3),saaEnv[i/3]);
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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,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
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if (chan[i].freq>65535) chan[i].freq=65535;
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if (chan[i].freq>=32768) {
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chan[i].freqH=7;
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} else if (chan[i].freq>=16384) {
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chan[i].freqH=6;
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} else if (chan[i].freq>=8192) {
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chan[i].freqH=5;
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} else if (chan[i].freq>=4096) {
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chan[i].freqH=4;
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} else if (chan[i].freq>=2048) {
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chan[i].freqH=3;
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} else if (chan[i].freq>=1024) {
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chan[i].freqH=2;
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} else if (chan[i].freq>=512) {
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chan[i].freqH=1;
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} else {
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chan[i].freqH=0;
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}
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chan[i].freqL=0xff-(chan[i].freq>>chan[i].freqH);
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chan[i].freqH=7-chan[i].freqH;
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if (chan[i].freq>4095) chan[i].freq=4095;
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if (chan[i].keyOn) {
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}
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if (chan[i].keyOff) {
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rWrite(i,0);
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}
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rWrite(0x08+i,chan[i].freqL);
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rWrite(0x10+(i>>1),chan[i&6].freqH|(chan[1+(i&6)].freqH<<4));
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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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rWrite(0x14,(chan[0].psgMode&1)|
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((chan[1].psgMode&1)<<1)|
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((chan[2].psgMode&1)<<2)|
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((chan[3].psgMode&1)<<3)|
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((chan[4].psgMode&1)<<4)|
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((chan[5].psgMode&1)<<5)
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);
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rWrite(0x15,((chan[0].psgMode&2)>>1)|
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(chan[1].psgMode&2)|
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((chan[2].psgMode&2)<<1)|
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((chan[3].psgMode&2)<<2)|
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((chan[4].psgMode&2)<<3)|
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((chan[5].psgMode&2)<<4)
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);
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}
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int DivPlatformSAA1099::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_SAA1099);
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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].keyOn=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(c.chan,0);
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} else {
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rWrite(c.chan,applyPan(chan[c.chan].vol&15,chan[c.chan].pan));
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}
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break;
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}
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case DIV_CMD_NOTE_OFF:
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chan[c.chan].keyOff=true;
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chan[c.chan].active=false;
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chan[c.chan].macroInit(NULL);
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break;
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case DIV_CMD_NOTE_OFF_ENV:
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case DIV_CMD_ENV_RELEASE:
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chan[c.chan].std.release();
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break;
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case DIV_CMD_VOLUME: {
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chan[c.chan].vol=c.value;
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if (!chan[c.chan].std.vol.has) {
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chan[c.chan].outVol=c.value;
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}
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if (isMuted[c.chan]) {
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rWrite(c.chan,0);
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} else {
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if (chan[c.chan].active) rWrite(c.chan,applyPan(chan[c.chan].vol&15,chan[c.chan].pan));
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}
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break;
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}
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case DIV_CMD_GET_VOLUME: {
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return chan[c.chan].vol;
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break;
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}
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case DIV_CMD_INSTRUMENT:
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if (chan[c.chan].ins!=c.value || c.value2==1) {
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chan[c.chan].insChanged=true;
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}
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chan[c.chan].ins=c.value;
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break;
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case DIV_CMD_PITCH: {
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chan[c.chan].pitch=c.value;
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chan[c.chan].freqChanged=true;
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break;
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}
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case DIV_CMD_NOTE_PORTA: {
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int destFreq=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*((parent->song.linearPitch==2)?1:(8-chan[c.chan].freqH));
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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*((parent->song.linearPitch==2)?1:(8-chan[c.chan].freqH));
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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_PANNING:
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chan[c.chan].pan=(c.value&0xf0)|(c.value2>>4);
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if (isMuted[c.chan]) {
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rWrite(c.chan,0);
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} else {
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if (chan[c.chan].active) rWrite(c.chan,applyPan(chan[c.chan].vol&15,chan[c.chan].pan));
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}
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break;
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case DIV_CMD_LEGATO: {
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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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break;
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}
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case DIV_CMD_STD_NOISE_MODE:
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chan[c.chan].psgMode=(c.value&1)|((c.value&16)>>3);
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break;
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case DIV_CMD_STD_NOISE_FREQ:
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saaNoise[c.chan/3]=(c.value&1)|((c.value&16)>>3);
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rWrite(0x16,saaNoise[0]|(saaNoise[1]<<4));
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break;
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case DIV_CMD_SAA_ENVELOPE:
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saaEnv[c.chan/3]=c.value;
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rWrite(0x18+(c.chan/3),c.value);
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break;
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case DIV_ALWAYS_SET_VOLUME:
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return 0;
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break;
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case DIV_CMD_GET_VOLMAX:
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return 15;
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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_SAA1099));
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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_PRE_NOTE:
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break;
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default:
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//printf("WARNING: unimplemented command %d\n",c.cmd);
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break;
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}
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return 1;
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}
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void DivPlatformSAA1099::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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if (isMuted[ch]) {
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rWrite(ch,0);
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} else {
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if (chan[ch].active) rWrite(ch,applyPan(chan[ch].outVol&15,chan[ch].pan));
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}
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}
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void DivPlatformSAA1099::forceIns() {
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for (int i=0; i<6; i++) {
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chan[i].insChanged=true;
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chan[i].freqChanged=true;
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}
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rWrite(0x18,saaEnv[0]);
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rWrite(0x19,saaEnv[1]);
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rWrite(0x16,saaNoise[0]|(saaNoise[1]<<4));
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}
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void* DivPlatformSAA1099::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformSAA1099::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivDispatchOscBuffer* DivPlatformSAA1099::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformSAA1099::getRegisterPool() {
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return regPool;
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}
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int DivPlatformSAA1099::getRegisterPoolSize() {
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return 32;
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}
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void DivPlatformSAA1099::reset() {
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while (!writes.empty()) writes.pop();
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memset(regPool,0,32);
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saa_saaSound->Clear();
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for (int i=0; i<6; i++) {
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chan[i]=DivPlatformSAA1099::Channel();
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chan[i].std.setEngine(parent);
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chan[i].vol=0x0f;
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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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lastBusy=60;
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dacMode=0;
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dacPeriod=0;
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dacPos=0;
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dacRate=0;
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dacSample=-1;
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sampleBank=0;
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saaEnv[0]=0;
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saaEnv[1]=0;
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saaNoise[0]=0;
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saaNoise[1]=0;
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delay=0;
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extMode=false;
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rWrite(8,255);
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rWrite(9,255);
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rWrite(10,255);
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rWrite(11,255);
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rWrite(12,255);
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rWrite(13,255);
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rWrite(16,0x77);
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rWrite(17,0x77);
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rWrite(18,0x77);
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rWrite(0x1c,2);
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rWrite(0x1c,1);
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}
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bool DivPlatformSAA1099::isStereo() {
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return true;
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}
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int DivPlatformSAA1099::getPortaFloor(int ch) {
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return 12;
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}
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bool DivPlatformSAA1099::keyOffAffectsArp(int ch) {
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return true;
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}
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void DivPlatformSAA1099::notifyInsDeletion(void* ins) {
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for (int i=0; i<6; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformSAA1099::setFlags(const DivConfig& flags) {
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int clockSel=flags.getInt("clockSel",0);
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if (clockSel==2) {
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chipClock=COLOR_PAL*8.0/5.0;
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} else if (clockSel==1) {
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chipClock=COLOR_NTSC*2.0;
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} else {
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chipClock=8000000;
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}
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rate=chipClock/32;
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for (int i=0; i<6; i++) {
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oscBuf[i]->rate=rate;
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}
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saa_saaSound->SetClockRate(chipClock);
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saa_saaSound->SetSampleRate(rate);
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}
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void DivPlatformSAA1099::poke(unsigned int addr, unsigned short val) {
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rWrite(addr,val);
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}
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void DivPlatformSAA1099::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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int DivPlatformSAA1099::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
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parent=p;
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dumpWrites=false;
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skipRegisterWrites=false;
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saa_saaSound=NULL;
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for (int i=0; i<6; i++) {
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isMuted[i]=false;
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oscBuf[i]=new DivDispatchOscBuffer;
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}
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saa_saaSound=CreateCSAASound();
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saa_saaSound->SetOversample(1);
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saa_saaSound->SetSoundParameters(SAAP_NOFILTER|SAAP_16BIT|SAAP_STEREO);
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setFlags(flags);
|
|
saaBufLen=65536;
|
|
for (int i=0; i<2; i++) saaBuf[i]=new short[saaBufLen];
|
|
reset();
|
|
return 3;
|
|
}
|
|
|
|
void DivPlatformSAA1099::quit() {
|
|
for (int i=0; i<6; i++) {
|
|
delete oscBuf[i];
|
|
}
|
|
if (saa_saaSound!=NULL) {
|
|
DestroyCSAASound(saa_saaSound);
|
|
saa_saaSound=NULL;
|
|
}
|
|
for (int i=0; i<2; i++) delete[] saaBuf[i];
|
|
}
|