463 lines
12 KiB
C++
463 lines
12 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 "msm6295.h"
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#include "../engine.h"
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#include "../../ta-log.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 rWriteDelay(a,v,d) if (!skipRegisterWrites) {writes.emplace(a,v,d); if (dumpWrites) {addWrite(a,v);} }
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const char** DivPlatformMSM6295::getRegisterSheet() {
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return NULL;
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}
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u8 DivPlatformMSM6295::read_byte(u32 address) {
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if (adpcmMem==NULL || address>=getSampleMemCapacity(0)) {
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return 0;
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}
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return adpcmMem[address&0x3ffff];
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}
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void DivPlatformMSM6295::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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if (delay<=0) {
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if (!writes.empty()) {
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QueuedWrite& w=writes.front();
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switch (w.addr) {
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case 0: // command
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msm.command_w(w.val);
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break;
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case 8: // chip clock select (VGM)
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case 9:
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case 10:
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case 11:
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break;
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case 12: // rate select
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msm.ss_w(!w.val);
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break;
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case 14: // enable bankswitch
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break;
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case 15: // set bank base
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break;
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case 16: // switch bank
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case 17:
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case 18:
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case 19:
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break;
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}
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writes.pop();
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delay=w.delay;
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}
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} else {
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delay-=3;
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}
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msm.tick();
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msm.tick();
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msm.tick();
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bufL[h]=msm.out()<<4;
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if (++updateOsc>=22) {
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updateOsc=0;
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// TODO: per-channel osc
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for (int i=0; i<4; i++) {
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oscBuf[i]->data[oscBuf[i]->needle++]=msm.voice_out(i)<<6;
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}
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}
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}
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}
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void DivPlatformMSM6295::tick(bool sysTick) {
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for (int i=0; i<4; i++) {
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if (!parent->song.disableSampleMacro) {
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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_LOG(chan[i].std.vol.val,chan[i].vol,8);
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}
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if (chan[i].std.duty.had) {
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if (rateSel!=(chan[i].std.duty.val&1)) {
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rateSel=chan[i].std.duty.val&1;
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rWrite(12,!rateSel);
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}
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}
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if (chan[i].std.phaseReset.had) {
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if (chan[i].std.phaseReset.val && chan[i].active) {
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chan[i].keyOn=true;
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}
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}
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}
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if (chan[i].keyOn || chan[i].keyOff) {
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rWriteDelay(0,(8<<i),60); // turn off
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if (chan[i].active && !chan[i].keyOff) {
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if (chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
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rWrite(0,0x80|chan[i].sample); // set phrase
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rWrite(0,(16<<i)|(8-chan[i].outVol)); // turn on
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} else {
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chan[i].sample=-1;
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}
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} else {
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chan[i].sample=-1;
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}
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chan[i].keyOn=false;
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chan[i].keyOff=false;
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}
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}
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}
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int DivPlatformMSM6295::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_FM);
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if (ins->type==DIV_INS_MSM6295 || ins->type==DIV_INS_AMIGA) {
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chan[c.chan].furnacePCM=true;
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} else {
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chan[c.chan].furnacePCM=false;
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}
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if (skipRegisterWrites) break;
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if (chan[c.chan].furnacePCM) {
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chan[c.chan].macroInit(ins);
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if (!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].sample=ins->amiga.getSample(c.value);
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if (chan[c.chan].sample>=0 && chan[c.chan].sample<parent->song.sampleLen) {
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//DivSample* s=parent->getSample(chan[c.chan].sample);
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].note=c.value;
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chan[c.chan].freqChanged=true;
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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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rWriteDelay(0,(8<<c.chan),180); // turn off
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rWrite(0,0x80|chan[c.chan].sample); // set phrase
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rWrite(0,(16<<c.chan)|(8-chan[c.chan].outVol)); // turn on
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} else {
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break;
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}
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} else {
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chan[c.chan].sample=-1;
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chan[c.chan].macroInit(NULL);
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chan[c.chan].outVol=chan[c.chan].vol;
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if ((12*sampleBank+c.value%12)<0 || (12*sampleBank+c.value%12)>=parent->song.sampleLen) {
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break;
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}
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//DivSample* s=parent->getSample(12*sampleBank+c.value%12);
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chan[c.chan].sample=12*sampleBank+c.value%12;
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rWriteDelay(0,(8<<c.chan),180); // turn off
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rWrite(0,0x80|chan[c.chan].sample); // set phrase
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rWrite(0,(16<<c.chan)|(8-chan[c.chan].outVol)); // turn on
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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].keyOn=false;
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chan[c.chan].active=false;
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rWriteDelay(0,(8<<c.chan),180); // turn off
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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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chan[c.chan].keyOff=true;
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chan[c.chan].keyOn=false;
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chan[c.chan].active=false;
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rWriteDelay(0,(8<<c.chan),180); // turn off
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chan[c.chan].std.release();
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break;
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case DIV_CMD_ENV_RELEASE:
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chan[c.chan].std.release();
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break;
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case DIV_CMD_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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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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break;
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}
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case DIV_CMD_NOTE_PORTA: {
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return 2;
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}
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case DIV_CMD_SAMPLE_FREQ:
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rateSel=c.value;
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rWrite(12,!rateSel);
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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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break;
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}
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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 8;
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break;
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case DIV_CMD_PRE_PORTA:
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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 DivPlatformMSM6295::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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msm.voice_mute(ch,mute);
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}
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void DivPlatformMSM6295::forceIns() {
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while (!writes.empty()) writes.pop();
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for (int i=0; i<4; i++) {
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chan[i].insChanged=true;
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}
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rWrite(12,!rateSel);
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}
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void* DivPlatformMSM6295::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformMSM6295::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivDispatchOscBuffer* DivPlatformMSM6295::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformMSM6295::getRegisterPool() {
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return NULL;
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}
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int DivPlatformMSM6295::getRegisterPoolSize() {
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return 0;
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}
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void DivPlatformMSM6295::poke(unsigned int addr, unsigned short val) {
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//immWrite(addr,val);
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}
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void DivPlatformMSM6295::poke(std::vector<DivRegWrite>& wlist) {
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//for (DivRegWrite& i: wlist) immWrite(i.addr,i.val);
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}
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void DivPlatformMSM6295::reset() {
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while (!writes.empty()) writes.pop();
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msm.reset();
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msm.ss_w(rateSelInit);
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if (dumpWrites) {
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addWrite(0xffffffff,0);
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}
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for (int i=0; i<4; i++) {
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chan[i]=DivPlatformMSM6295::Channel();
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chan[i].std.setEngine(parent);
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msm.voice_mute(i,isMuted[i]);
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}
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for (int i=0; i<4; i++) {
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chan[i].vol=8;
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chan[i].outVol=8;
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}
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sampleBank=0;
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rateSel=rateSelInit;
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rWrite(12,!rateSelInit);
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delay=0;
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}
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bool DivPlatformMSM6295::keyOffAffectsArp(int ch) {
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return false;
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}
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float DivPlatformMSM6295::getPostAmp() {
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return 3.0f;
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}
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void DivPlatformMSM6295::notifyInsChange(int ins) {
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for (int i=0; i<4; i++) {
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if (chan[i].ins==ins) {
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chan[i].insChanged=true;
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}
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}
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}
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void DivPlatformMSM6295::notifyInsDeletion(void* ins) {
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}
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const void* DivPlatformMSM6295::getSampleMem(int index) {
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return index == 0 ? adpcmMem : NULL;
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}
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size_t DivPlatformMSM6295::getSampleMemCapacity(int index) {
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return index == 0 ? 262144 : 0;
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}
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size_t DivPlatformMSM6295::getSampleMemUsage(int index) {
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return index == 0 ? adpcmMemLen : 0;
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}
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void DivPlatformMSM6295::renderSamples() {
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unsigned int sampleOffVOX[256];
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memset(adpcmMem,0,getSampleMemCapacity(0));
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memset(sampleOffVOX,0,256*sizeof(unsigned int));
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// sample data
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size_t memPos=128*8;
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int sampleCount=parent->song.sampleLen;
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if (sampleCount>128) sampleCount=128;
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for (int i=0; i<sampleCount; i++) {
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DivSample* s=parent->song.sample[i];
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int paddedLen=s->lengthVOX;
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if (memPos>=getSampleMemCapacity(0)) {
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logW("out of ADPCM memory for sample %d!",i);
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break;
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}
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if (memPos+paddedLen>=getSampleMemCapacity(0)) {
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memcpy(adpcmMem+memPos,s->dataVOX,getSampleMemCapacity(0)-memPos);
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logW("out of ADPCM memory for sample %d!",i);
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} else {
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memcpy(adpcmMem+memPos,s->dataVOX,paddedLen);
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}
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sampleOffVOX[i]=memPos;
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memPos+=paddedLen;
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}
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adpcmMemLen=memPos+256;
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// phrase book
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for (int i=0; i<sampleCount; i++) {
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DivSample* s=parent->song.sample[i];
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int endPos=sampleOffVOX[i]+s->lengthVOX;
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adpcmMem[i*8]=(sampleOffVOX[i]>>16)&0xff;
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adpcmMem[1+i*8]=(sampleOffVOX[i]>>8)&0xff;
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adpcmMem[2+i*8]=(sampleOffVOX[i])&0xff;
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adpcmMem[3+i*8]=(endPos>>16)&0xff;
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adpcmMem[4+i*8]=(endPos>>8)&0xff;
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adpcmMem[5+i*8]=(endPos)&0xff;
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}
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}
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void DivPlatformMSM6295::setFlags(const DivConfig& flags) {
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rateSelInit=flags.getBool("rateSel",false);
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switch (flags.getInt("clockSel",0)) {
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case 1:
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chipClock=4224000/4;
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break;
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case 2:
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chipClock=4000000;
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break;
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case 3:
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chipClock=4224000;
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break;
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case 4:
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chipClock=COLOR_NTSC;
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break;
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case 5:
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chipClock=COLOR_NTSC/2.0;
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break;
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case 6:
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chipClock=COLOR_NTSC*2.0/7.0;
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break;
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case 7:
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chipClock=COLOR_NTSC/4.0;
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break;
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case 8:
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chipClock=4000000/2;
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break;
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case 9:
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chipClock=4224000/2;
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break;
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case 10:
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chipClock=875000;
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break;
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case 11:
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chipClock=937500;
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break;
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case 12:
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chipClock=1500000;
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break;
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case 13:
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chipClock=3000000;
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break;
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case 14:
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chipClock=COLOR_NTSC/3.0;
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break;
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default:
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chipClock=4000000/4;
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break;
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}
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rate=chipClock/3;
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for (int i=0; i<4; i++) {
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oscBuf[i]->rate=rate/22;
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}
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if (rateSel!=rateSelInit) {
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rWrite(12,!rateSelInit);
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rateSel=rateSelInit;
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}
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}
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int DivPlatformMSM6295::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
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parent=p;
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adpcmMem=new unsigned char[getSampleMemCapacity(0)];
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adpcmMemLen=0;
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dumpWrites=false;
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skipRegisterWrites=false;
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updateOsc=0;
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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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setFlags(flags);
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reset();
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return 4;
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}
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void DivPlatformMSM6295::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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delete[] adpcmMem;
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}
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DivPlatformMSM6295::~DivPlatformMSM6295() {
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}
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