477 lines
13 KiB
C++
477 lines
13 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2023 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 "rf5c68.h"
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#include "../engine.h"
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#include "../../ta-log.h"
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#include <math.h>
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#define rWrite(a,v) {if(!skipRegisterWrites) {rf5c68.rf5c68_w(a,v); regPool[a]=v; if(dumpWrites) addWrite(a,v);}}
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#define CHIP_FREQBASE 786432
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const char* regCheatSheetRF5C68[]={
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"Volume", "0",
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"Panning", "1",
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"FreqL", "2",
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"FreqH", "3",
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"LoopStartL", "4",
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"LoopStartH", "5",
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"StartH", "6",
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"Control", "7",
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"Disable", "8",
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NULL
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};
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const char** DivPlatformRF5C68::getRegisterSheet() {
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return regCheatSheetRF5C68;
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}
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void DivPlatformRF5C68::chWrite(unsigned char ch, unsigned int addr, unsigned char val) {
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if (!skipRegisterWrites) {
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if (curChan!=ch) {
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curChan=ch;
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rWrite(7,curChan|0xc0);
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}
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regPool[16+((ch)<<4)+((addr)&0x0f)]=val;
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rWrite(addr,val);
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}
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}
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// TODO: this code is weird
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// make sure newDispatch didn't break it up
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void DivPlatformRF5C68::acquire(short** buf, size_t len) {
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short bufC[16][256];
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short* chBufPtrs[16]={
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bufC[0],bufC[1],bufC[2],bufC[3],bufC[4],bufC[5],bufC[6],bufC[7],
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bufC[8],bufC[9],bufC[10],bufC[11],bufC[12],bufC[13],bufC[14],bufC[15]
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};
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size_t pos=0;
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for (int i=0; i<16; i++) {
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memset(bufC[i],0,256*sizeof(short));
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}
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while (len > 0) {
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size_t blockLen=MIN(len,256);
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short* bufPtrs[2]={&buf[0][pos],&buf[1][pos]};
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rf5c68.sound_stream_update(bufPtrs,chBufPtrs,blockLen);
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for (int i=0; i<8; i++) {
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for (size_t j=0; j<blockLen; j++) {
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oscBuf[i]->data[oscBuf[i]->needle++]=(bufC[i*2][j]+bufC[i*2+1][j])>>1;
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}
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}
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pos+=blockLen;
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len-=blockLen;
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}
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}
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void DivPlatformRF5C68::tick(bool sysTick) {
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for (int i=0; i<8; i++) {
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chan[i].std.next();
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if (chan[i].std.vol.had) {
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chan[i].outVol=((chan[i].vol&0xff)*MIN(chan[i].macroVolMul,chan[i].std.vol.val))/chan[i].macroVolMul;
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chWrite(i,0,chan[i].outVol);
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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_FREQUENCY(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.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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// panning registers are reversed in this chip
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if (chan[i].std.panL.had) {
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chan[i].panning&=0xf0;
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chan[i].panning|=chan[i].std.panL.val&15;
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}
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if (chan[i].std.panR.had) {
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chan[i].panning&=0x0f;
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chan[i].panning|=(chan[i].std.panR.val&15)<<4;
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}
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if (chan[i].std.panL.had || chan[i].std.panR.had) {
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chWrite(i,1,isMuted[i]?0:chan[i].panning);
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}
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if (chan[i].std.phaseReset.had) {
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if (chan[i].std.phaseReset.val==1 && chan[i].active) {
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chan[i].audPos=0;
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chan[i].setPos=true;
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}
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}
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if (chan[i].setPos) {
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// force keyon
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chan[i].keyOn=true;
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chan[i].setPos=false;
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} else {
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chan[i].audPos=0;
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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unsigned char keyon=regPool[8]&~(1<<i);
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unsigned char keyoff=keyon|(1<<i);
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DivSample* s=parent->getSample(chan[i].sample);
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double off=(s->centerRate>=1)?((double)s->centerRate/8363.0):1.0;
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chan[i].freq=(int)(off*parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,2,chan[i].pitch2,chipClock,CHIP_FREQBASE));
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if (chan[i].freq>65535) chan[i].freq=65535;
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if (chan[i].keyOn) {
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unsigned int start=0;
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unsigned int loop=0;
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if (chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
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start=sampleOffRFC[chan[i].sample];
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loop=start+s->length8;
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}
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if (chan[i].audPos>0) {
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start=start+MIN(chan[i].audPos,s->length8);
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}
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if (s->isLoopable()) {
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loop=start+s->loopStart;
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}
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start=MIN(start,getSampleMemCapacity()-32);
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loop=MIN(loop,getSampleMemCapacity()-32);
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rWrite(8,keyoff); // force keyoff first
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chWrite(i,6,start>>8);
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chWrite(i,4,loop&0xff);
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chWrite(i,5,loop>>8);
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if (!chan[i].std.vol.had) {
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chan[i].outVol=chan[i].vol;
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chWrite(i,0,chan[i].outVol);
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}
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rWrite(8,keyon);
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chan[i].keyOn=false;
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}
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if (chan[i].keyOff) {
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rWrite(8,keyoff);
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chan[i].keyOff=false;
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}
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if (chan[i].freqChanged) {
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chWrite(i,2,chan[i].freq&0xff);
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chWrite(i,3,chan[i].freq>>8);
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chan[i].freqChanged=false;
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}
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}
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}
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}
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int DivPlatformRF5C68::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_AMIGA);
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chan[c.chan].macroVolMul=ins->type==DIV_INS_AMIGA?64:255;
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].sample=ins->amiga.getSample(c.value);
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c.value=ins->amiga.getFreq(c.value);
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}
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value);
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}
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if (chan[c.chan].sample<0 || chan[c.chan].sample>=parent->song.sampleLen) {
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chan[c.chan].sample=-1;
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}
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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}
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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chan[c.chan].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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break;
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}
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case DIV_CMD_NOTE_OFF:
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chan[c.chan].sample=-1;
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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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}
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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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chWrite(c.chan,0,chan[c.chan].outVol);
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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_PANNING:
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chan[c.chan].panning=(c.value>>4)|(c.value2&0xf0);
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chWrite(c.chan,1,isMuted[c.chan]?0:chan[c.chan].panning);
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break;
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case DIV_CMD_PITCH:
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chan[c.chan].pitch=c.value;
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chan[c.chan].freqChanged=true;
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break;
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case DIV_CMD_NOTE_PORTA: {
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int destFreq=NOTE_FREQUENCY(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_FREQUENCY(c.value+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val-12):(0)));
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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break;
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}
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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_AMIGA));
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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_FREQUENCY(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_SAMPLE_POS:
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chan[c.chan].audPos=c.value;
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chan[c.chan].setPos=true;
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break;
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case DIV_CMD_GET_VOLMAX:
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return 255;
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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 DivPlatformRF5C68::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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chWrite(ch,1,mute?0:chan[ch].panning);
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}
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void DivPlatformRF5C68::forceIns() {
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for (int i=0; i<8; i++) {
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chan[i].insChanged=true;
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chan[i].freqChanged=true;
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chan[i].sample=-1;
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chWrite(i,1,isMuted[i]?0:chan[i].panning);
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}
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}
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void* DivPlatformRF5C68::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformRF5C68::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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unsigned short DivPlatformRF5C68::getPan(int ch) {
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return ((chan[ch].panning&15)<<8)|((chan[ch].panning&0xf0)>>4);
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}
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DivDispatchOscBuffer* DivPlatformRF5C68::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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void DivPlatformRF5C68::reset() {
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memset(regPool,0,144);
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rf5c68.device_reset();
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rWrite(0x08,0xff); // keyoff all channels
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for (int i=0; i<8; i++) {
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chan[i]=DivPlatformRF5C68::Channel();
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chan[i].std.setEngine(parent);
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chWrite(i,0,255);
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chWrite(i,1,isMuted[i]?0:255);
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}
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}
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int DivPlatformRF5C68::getOutputCount() {
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return 2;
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}
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void DivPlatformRF5C68::notifyInsChange(int ins) {
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for (int i=0; i<8; 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 DivPlatformRF5C68::notifyWaveChange(int wave) {
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}
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void DivPlatformRF5C68::notifyInsDeletion(void* ins) {
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for (int i=0; i<8; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformRF5C68::setFlags(const DivConfig& flags) {
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switch (flags.getInt("clockSel",0)) {
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case 1: chipClock=10000000; break;
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case 2: chipClock=12500000; break;
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default: chipClock=8000000; break;
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}
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CHECK_CUSTOM_CLOCK;
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chipType=flags.getInt("chipType",0);
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rate=chipClock/384;
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for (int i=0; i<8; i++) {
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oscBuf[i]->rate=rate;
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}
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rf5c68=(chipType==1)?rf5c164_device():rf5c68_device();
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rf5c68.device_start(sampleMem);
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}
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void DivPlatformRF5C68::poke(unsigned int addr, unsigned short val) {
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rWrite(addr&0x0f,val);
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}
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void DivPlatformRF5C68::poke(std::vector<DivRegWrite>& wlist) {
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for (DivRegWrite& i: wlist) rWrite(i.addr&0x0f,i.val);
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}
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unsigned char* DivPlatformRF5C68::getRegisterPool() {
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return regPool;
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}
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int DivPlatformRF5C68::getRegisterPoolSize() {
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return 144;
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}
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const void* DivPlatformRF5C68::getSampleMem(int index) {
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return index == 0 ? sampleMem : NULL;
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}
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size_t DivPlatformRF5C68::getSampleMemCapacity(int index) {
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return index == 0 ? 65536 : 0;
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}
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size_t DivPlatformRF5C68::getSampleMemUsage(int index) {
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return index == 0 ? sampleMemLen : 0;
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}
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bool DivPlatformRF5C68::isSampleLoaded(int index, int sample) {
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if (index!=0) return false;
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if (sample<0 || sample>255) return false;
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return sampleLoaded[sample];
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}
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void DivPlatformRF5C68::renderSamples(int sysID) {
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memset(sampleMem,0,getSampleMemCapacity());
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memset(sampleOffRFC,0,256*sizeof(unsigned int));
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memset(sampleLoaded,0,256*sizeof(bool));
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size_t memPos=0;
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for (int i=0; i<parent->song.sampleLen; i++) {
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DivSample* s=parent->song.sample[i];
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if (!s->renderOn[0][sysID]) {
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sampleOffRFC[i]=0;
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continue;
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}
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int length=s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT);
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int actualLength=MIN((int)(getSampleMemCapacity()-memPos)-32,length);
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if (actualLength>0) {
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sampleOffRFC[i]=memPos;
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for (int j=0; j<actualLength; j++) {
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// convert to signed magnitude
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signed char val=s->data8[j];
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CLAMP_VAR(val,-127,126);
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sampleMem[memPos++]=(val>0)?(val|0x80):(0-val);
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}
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// write end of sample marker
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memset(&sampleMem[memPos],0xff,32);
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memPos+=32;
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}
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if (actualLength<length) {
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logW("out of RF5C68 PCM memory for sample %d!",i);
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break;
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}
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// align memPos to 256-byte boundary
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memPos=(memPos+0xff)&~0xff;
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sampleLoaded[i]=true;
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}
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sampleMemLen=memPos;
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}
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int DivPlatformRF5C68::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<8; i++) {
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isMuted[i]=false;
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oscBuf[i]=new DivDispatchOscBuffer;
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}
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sampleMem=new unsigned char[getSampleMemCapacity()];
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sampleMemLen=0;
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setFlags(flags);
|
|
reset();
|
|
|
|
return 8;
|
|
}
|
|
|
|
void DivPlatformRF5C68::quit() {
|
|
delete[] sampleMem;
|
|
for (int i=0; i<8; i++) {
|
|
delete oscBuf[i];
|
|
}
|
|
}
|