start work on POKEY
to-do: - add ability to change AUDCTL - bass shape frequency and waveform mapping - easy noise???
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tildearrow
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4ba8c0513e
commit
ba674a0329
7 changed files with 452 additions and 2 deletions
363
src/engine/platform/pokey.cpp
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363
src/engine/platform/pokey.cpp
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/**
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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 "pokey.h"
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#include "../engine.h"
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#include "../../ta-log.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 1
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const char* regCheatSheetPOKEY[]={
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"AUDF1", "0",
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"AUDC1", "1",
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"AUDF2", "2",
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"AUDC2", "3",
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"AUDF3", "4",
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"AUDC3", "5",
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"AUDF4", "6",
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"AUDC4", "7",
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"AUDCTL", "8",
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NULL
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};
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const char** DivPlatformPOKEY::getRegisterSheet() {
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return regCheatSheetPOKEY;
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}
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void DivPlatformPOKEY::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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while (!writes.empty()) {
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QueuedWrite w=writes.front();
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Update_pokey_sound_mz(&pokey,w.addr,w.val,0);
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regPool[w.addr&0x0f]=w.val;
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writes.pop();
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}
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mzpokeysnd_process_16(&pokey,&bufL[h],1);
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}
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}
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void DivPlatformPOKEY::tick(bool sysTick) {
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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.vol.had) {
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chan[i].outVol=VOL_SCALE_LINEAR(chan[i].vol&15,MIN(15,chan[i].std.vol.val),15);
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chan[i].ctlChanged=true;
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}
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if (NEW_ARP_STRAT) {
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chan[i].handleArp();
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} else 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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chan[i].wave=chan[i].std.wave.val;
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chan[i].ctlChanged=true;
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chan[i].freqChanged=true;
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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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}
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if (audctlChanged) {
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audctlChanged=false;
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rWrite(8,audctl);
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for (int i=0; i<4; i++) {
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chan[i].freqChanged=true;
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chan[i].ctlChanged=true;
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}
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}
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for (int i=0; i<4; i++) {
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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,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
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if ((i==0 && !(audctl&64)) || (i==2 && !(audctl&32)) || i==1 || i==3) {
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chan[i].freq+=chan[i].freq>>3;
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chan[i].freq>>=4;
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if (chan[i].freq&1) chan[i].freq++;
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chan[i].freq>>=1;
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}
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if (audctl&1) {
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chan[i].freq>>=2;
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}
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if ((i==0 && audctl&16) || (i==2 && audctl&8)) {
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if (chan[i].freq>65535) chan[i].freq=65535;
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} else {
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if (chan[i].freq>255) chan[i].freq=255;
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}
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if (--chan[i].freq<0) chan[i].freq=0;
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// write frequency
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if ((i==1 && audctl&16) || (i==3 && audctl&8)) {
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// ignore - channel is paired
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} else {
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rWrite(i<<1,chan[i].freq);
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logV("%d: %d",i,chan[i].freq);
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}
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if (chan[i].keyOff) {
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chan[i].ctlChanged=true;
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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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if (chan[i].ctlChanged) {
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unsigned char val=((chan[i].active && !isMuted[i])?(chan[i].outVol&15):0)|(chan[i].wave<<5);
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if ((i==1 && audctl&16) || (i==3 && audctl&8)) {
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// mute - channel is paired
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val=0;
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}
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chan[i].ctlChanged=false;
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rWrite(1+(i<<1),val);
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}
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}
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}
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int DivPlatformPOKEY::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_POKEY);
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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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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].keyOff=true;
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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_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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chan[c.chan].insChanged=true;
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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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if (chan[c.chan].active) {
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chan[c.chan].ctlChanged=true;
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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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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].ctlChanged=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_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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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_POKEY));
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}
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if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will && !NEW_ARP_STRAT) 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_CMD_MACRO_OFF:
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chan[c.chan].std.mask(c.value,true);
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break;
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case DIV_CMD_MACRO_ON:
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chan[c.chan].std.mask(c.value,false);
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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 DivPlatformPOKEY::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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chan[ch].ctlChanged=true;
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}
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void DivPlatformPOKEY::forceIns() {
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for (int i=0; i<4; i++) {
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chan[i].insChanged=true;
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chan[i].ctlChanged=true;
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chan[i].freqChanged=true;
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}
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}
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void* DivPlatformPOKEY::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformPOKEY::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivDispatchOscBuffer* DivPlatformPOKEY::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformPOKEY::getRegisterPool() {
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return regPool;
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}
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int DivPlatformPOKEY::getRegisterPoolSize() {
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return 9;
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}
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void DivPlatformPOKEY::reset() {
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while (!writes.empty()) writes.pop();
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memset(regPool,0,16);
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for (int i=0; i<4; i++) {
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chan[i]=DivPlatformPOKEY::Channel();
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chan[i].std.setEngine(parent);
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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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ResetPokeyState(&pokey);
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audctl=0;
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audctlChanged=true;
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}
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bool DivPlatformPOKEY::keyOffAffectsArp(int ch) {
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return true;
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}
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void DivPlatformPOKEY::notifyInsDeletion(void* ins) {
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for (int i=0; i<4; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformPOKEY::setFlags(const DivConfig& flags) {
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if (flags.getInt("clockSel",0)) {
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chipClock=COLOR_PAL*2.0/5.0;
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} else {
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chipClock=COLOR_NTSC/2.0;
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}
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CHECK_CUSTOM_CLOCK;
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rate=chipClock;
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for (int i=0; i<4; i++) {
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oscBuf[i]->rate=rate/16;
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}
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}
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void DivPlatformPOKEY::poke(unsigned int addr, unsigned short val) {
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rWrite(addr,val);
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}
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void DivPlatformPOKEY::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 DivPlatformPOKEY::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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for (int i=0; i<4; i++) {
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isMuted[i]=false;
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oscBuf[i]=new DivDispatchOscBuffer;
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}
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MZPOKEYSND_Init(&pokey);
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setFlags(flags);
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reset();
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return 6;
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}
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void DivPlatformPOKEY::quit() {
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for (int i=0; i<4; i++) {
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delete oscBuf[i];
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}
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}
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DivPlatformPOKEY::~DivPlatformPOKEY() {
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}
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