458 lines
13 KiB
C++
458 lines
13 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2022 tildearrow and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "vera.h"
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#include "../engine.h"
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#include <string.h>
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#include <math.h>
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extern "C" {
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#include "sound/vera_psg.h"
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#include "sound/vera_pcm.h"
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}
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//if (dumpWrites) {addWrite(((c)*4+(a)),(d));}
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//#define rWrite(c,a,d) {regPool[(c)*4+(a)]=(d); psg_writereg(psg,((c)*4+(a)),(d));}
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#define rWrite(c,a,d) {regPool[(c)*4+(a)]=(d); psg_writereg(psg,((c)*4+(a)),(d));if (dumpWrites) {addWrite(((c)*4+(a)),(d));}}
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#define rWriteLo(c,a,d) rWrite(c,a,(regPool[(c)*4+(a)]&(~0x3f))|((d)&0x3f))
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#define rWriteHi(c,a,d) rWrite(c,a,(regPool[(c)*4+(a)]&(~0xc0))|(((d)<<6)&0xc0))
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#define rWritePCMCtrl(d) {regPool[64]=(d); pcm_write_ctrl(pcm,d);}
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#define rWritePCMRate(d) {regPool[65]=(d); pcm_write_rate(pcm,d);}
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#define rWritePCMData(d) {regPool[66]=(d); pcm_write_fifo(pcm,d);}
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#define rWritePCMVol(d) rWritePCMCtrl((regPool[64]&(~0x3f))|((d)&0x3f))
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const char* regCheatSheetVERA[]={
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"CHxFreq", "00+x*4",
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"CHxVol", "02+x*4",
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"CHxWave", "03+x*4",
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"AUDIO_CTRL", "40",
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"AUDIO_RATE", "41",
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"AUDIO_DATA", "42",
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NULL
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};
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const char** DivPlatformVERA::getRegisterSheet() {
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return regCheatSheetVERA;
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}
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void DivPlatformVERA::acquire(short* bufL, short* bufR, size_t start, size_t len) {
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// both PSG part and PCM part output a full 16-bit range, putting bufL/R
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// argument right into both could cause an overflow
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short buf[4][128];
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size_t pos=start;
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DivSample* s=parent->getSample(chan[16].pcm.sample);
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while (len>0) {
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if (s->samples>0) {
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while (pcm_is_fifo_almost_empty(pcm)) {
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short tmp_l=0;
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short tmp_r=0;
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if (!isMuted[16]) {
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// TODO stereo samples once DivSample has a support for it
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if (chan[16].pcm.depth16) {
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tmp_l=s->data16[chan[16].pcm.pos];
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tmp_r=tmp_l;
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} else {
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tmp_l=s->data8[chan[16].pcm.pos];
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tmp_r=tmp_l;
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}
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if (!(chan[16].pan&1)) tmp_l=0;
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if (!(chan[16].pan&2)) tmp_r=0;
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}
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if (chan[16].pcm.depth16) {
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rWritePCMData(tmp_l&0xff);
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rWritePCMData((tmp_l>>8)&0xff);
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rWritePCMData(tmp_r&0xff);
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rWritePCMData((tmp_r>>8)&0xff);
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} else {
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rWritePCMData(tmp_l&0xff);
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rWritePCMData(tmp_r&0xff);
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}
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chan[16].pcm.pos++;
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if (s->isLoopable() && chan[16].pcm.pos>=(unsigned int)s->loopEnd) {
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chan[16].pcm.pos=s->loopStart;
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} else if (chan[16].pcm.pos>=s->samples) {
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chan[16].pcm.sample=-1;
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break;
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}
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}
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} else {
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// just let the buffer run out
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chan[16].pcm.sample=-1;
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}
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int curLen=MIN(len,128);
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memset(buf,0,sizeof(buf));
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pcm_render(pcm,buf[2],buf[3],curLen);
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for (int i=0; i<curLen; i++) {
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psg_render(psg,&buf[0][i],&buf[1][i],1);
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bufL[pos]=(short)(((int)buf[0][i]+buf[2][i])/2);
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bufR[pos]=(short)(((int)buf[1][i]+buf[3][i])/2);
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pos++;
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for (int i=0; i<16; i++) {
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oscBuf[i]->data[oscBuf[i]->needle++]=psg->channels[i].lastOut<<4;
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}
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int pcmOut=buf[2][i]+buf[3][i];
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if (pcmOut<-32768) pcmOut=-32768;
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if (pcmOut>32767) pcmOut=32767;
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oscBuf[16]->data[oscBuf[16]->needle++]=pcmOut;
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}
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len-=curLen;
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}
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}
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void DivPlatformVERA::reset() {
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for (int i=0; i<17; i++) {
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chan[i]=Channel();
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chan[i].std.setEngine(parent);
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}
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psg_reset(psg);
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pcm_reset(pcm);
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memset(regPool,0,67);
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for (int i=0; i<16; i++) {
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chan[i].vol=63;
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chan[i].pan=3;
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rWriteHi(i,2,isMuted[i]?0:3);
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}
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chan[16].vol=15;
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chan[16].pan=3;
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}
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int DivPlatformVERA::calcNoteFreq(int ch, int note) {
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if (ch<16) {
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return parent->calcBaseFreq(chipClock,2097152,note,false);
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} else {
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double off=65536.0;
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if (chan[ch].pcm.sample>=0 && chan[ch].pcm.sample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(chan[ch].pcm.sample);
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if (s->centerRate<1) {
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off=65536.0;
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} else {
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off=65536.0*(s->centerRate/8363.0);
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}
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}
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return (int)(parent->calcBaseFreq(chipClock,off,note,false));
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}
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}
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void DivPlatformVERA::tick(bool sysTick) {
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for (int i=0; i<16; 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=MAX(chan[i].vol+chan[i].std.vol.val-63,0);
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rWriteLo(i,2,chan[i].outVol);
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}
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if (chan[i].std.arp.had) {
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if (!chan[i].inPorta) {
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chan[i].baseFreq=calcNoteFreq(0,parent->calcArp(chan[i].note,chan[i].std.arp.val));
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].std.duty.had) {
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rWriteLo(i,3,chan[i].std.duty.val);
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}
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if (chan[i].std.wave.had) {
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rWriteHi(i,3,chan[i].std.wave.val);
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}
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if (i<16) {
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if (chan[i].std.panL.had) {
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chan[i].pan=chan[i].std.panL.val&3;
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chan[i].pan=((chan[i].pan&1)<<1)|((chan[i].pan&2)>>1);
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rWriteHi(i,2,isMuted[i]?0:chan[i].pan);
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}
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}
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if (chan[i].std.pitch.had) {
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if (chan[i].std.pitch.mode) {
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chan[i].pitch2+=chan[i].std.pitch.val;
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CLAMP_VAR(chan[i].pitch2,-32768,32767);
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} else {
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chan[i].pitch2=chan[i].std.pitch.val;
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].freqChanged) {
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chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,8,chan[i].pitch2,chipClock,2097152);
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if (chan[i].freq>65535) chan[i].freq=65535;
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rWrite(i,0,chan[i].freq&0xff);
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rWrite(i,1,(chan[i].freq>>8)&0xff);
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chan[i].freqChanged=false;
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}
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}
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// PCM
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chan[16].std.next();
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if (chan[16].std.vol.had) {
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chan[16].outVol=MAX(chan[16].vol+MIN(chan[16].std.vol.val/4,15)-15,0);
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rWritePCMVol(chan[16].outVol&15);
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}
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if (chan[16].std.arp.had) {
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if (!chan[16].inPorta) {
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chan[16].baseFreq=calcNoteFreq(16,parent->calcArp(chan[16].note,chan[16].std.arp.val));
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}
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chan[16].freqChanged=true;
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}
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if (chan[16].freqChanged) {
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double off=65536.0;
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if (chan[16].pcm.sample>=0 && chan[16].pcm.sample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(chan[16].pcm.sample);
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if (s->centerRate<1) {
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off=65536.0;
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} else {
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off=65536.0*(s->centerRate/8363.0);
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}
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}
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chan[16].freq=parent->calcFreq(chan[16].baseFreq,chan[16].pitch,false,8,chan[16].pitch2,chipClock,off);
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if (chan[16].freq>128) chan[16].freq=128;
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rWritePCMRate(chan[16].freq&0xff);
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chan[16].freqChanged=false;
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}
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}
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int DivPlatformVERA::dispatch(DivCommand c) {
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int tmp;
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switch (c.cmd) {
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case DIV_CMD_NOTE_ON:
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if (c.chan<16) {
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rWriteLo(c.chan,2,chan[c.chan].vol);
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} else {
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chan[16].pcm.sample=parent->getIns(chan[16].ins,DIV_INS_VERA)->amiga.getSample(c.value);
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if (chan[16].pcm.sample<0 || chan[16].pcm.sample>=parent->song.sampleLen) {
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chan[16].pcm.sample=-1;
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}
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chan[16].pcm.pos=0;
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DivSample* s=parent->getSample(chan[16].pcm.sample);
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unsigned char ctrl=0x90|chan[16].vol; // always stereo
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if (s->depth==DIV_SAMPLE_DEPTH_16BIT) {
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chan[16].pcm.depth16=true;
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ctrl|=0x20;
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} else {
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chan[16].pcm.depth16=false;
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if (s->depth!=DIV_SAMPLE_DEPTH_8BIT) chan[16].pcm.sample=-1;
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}
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rWritePCMCtrl(ctrl);
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}
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if (c.value!=DIV_NOTE_NULL) {
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chan[c.chan].baseFreq=calcNoteFreq(c.chan,c.value);
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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}
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chan[c.chan].active=true;
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chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_VERA));
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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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case DIV_CMD_NOTE_OFF:
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chan[c.chan].active=false;
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if(c.chan<16) {
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rWriteLo(c.chan,2,0)
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} else {
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chan[16].pcm.sample=-1;
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rWritePCMCtrl(0x80);
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rWritePCMRate(0);
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}
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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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chan[c.chan].ins=(unsigned char)c.value;
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break;
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case DIV_CMD_VOLUME:
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if (c.chan<16) {
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tmp=c.value&0x3f;
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chan[c.chan].vol=tmp;
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if (chan[c.chan].active) {
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rWriteLo(c.chan,2,tmp);
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}
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} else {
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tmp=c.value&0x0f;
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chan[c.chan].vol=tmp;
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if (chan[c.chan].active) {
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rWritePCMVol(tmp);
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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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return chan[c.chan].vol;
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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=calcNoteFreq(c.chan,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=calcNoteFreq(c.chan,c.value+((chan[c.chan].std.arp.will && !chan[c.chan].std.arp.mode)?(chan[c.chan].std.arp.val):(0)));
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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break;
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case DIV_CMD_PRE_PORTA:
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if (chan[c.chan].active && c.value2) {
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if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_VERA));
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}
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if (!chan[c.chan].inPorta && c.value && chan[c.chan].std.arp.will) chan[c.chan].baseFreq=calcNoteFreq(c.chan,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_STD_NOISE_MODE:
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if (c.chan<16) rWriteLo(c.chan,3,c.value);
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break;
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case DIV_CMD_WAVE:
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if (c.chan<16) rWriteHi(c.chan,3,c.value);
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break;
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case DIV_CMD_PANNING: {
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tmp=0;
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tmp|=(c.value>0)?1:0;
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tmp|=(c.value2>0)?2:0;
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chan[c.chan].pan=tmp&3;
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if (c.chan<16) {
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rWriteHi(c.chan,2,isMuted[c.chan]?0:chan[c.chan].pan);
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}
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break;
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}
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case DIV_CMD_GET_VOLMAX:
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if(c.chan<16) {
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return 63;
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} else {
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return 15;
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}
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break;
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case DIV_ALWAYS_SET_VOLUME:
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return 0;
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break;
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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* DivPlatformVERA::getChanState(int ch) {
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return &chan[ch];
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}
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DivMacroInt* DivPlatformVERA::getChanMacroInt(int ch) {
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return &chan[ch].std;
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}
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DivDispatchOscBuffer* DivPlatformVERA::getOscBuffer(int ch) {
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return oscBuf[ch];
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}
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unsigned char* DivPlatformVERA::getRegisterPool() {
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return regPool;
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}
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int DivPlatformVERA::getRegisterPoolSize() {
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return 67;
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}
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void DivPlatformVERA::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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if (ch<16) {
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rWriteHi(ch,2,mute?0:chan[ch].pan);
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}
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}
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float DivPlatformVERA::getPostAmp() {
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return 4.0f;
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}
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bool DivPlatformVERA::isStereo() {
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return true;
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}
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void DivPlatformVERA::notifyInsDeletion(void* ins) {
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for (int i=0; i<2; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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void DivPlatformVERA::poke(unsigned int addr, unsigned short val) {
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switch (addr) {
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case 64:
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rWritePCMCtrl((unsigned char)val);
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break;
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case 65:
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rWritePCMRate((unsigned char)val);
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break;
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case 66:
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rWritePCMData((unsigned char)val);
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break;
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default:
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rWrite(0,addr,(unsigned char)val);
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break;
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}
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}
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void DivPlatformVERA::poke(std::vector<DivRegWrite>& wlist) {
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for (auto &i: wlist) poke(i.addr,i.val);
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}
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int DivPlatformVERA::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
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for (int i=0; i<17; i++) {
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isMuted[i]=false;
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oscBuf[i]=new DivDispatchOscBuffer;
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}
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parent=p;
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psg=new struct VERA_PSG;
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pcm=new struct VERA_PCM;
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dumpWrites=false;
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skipRegisterWrites=false;
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chipClock=25000000;
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rate=chipClock/512;
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for (int i=0; i<17; i++) {
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oscBuf[i]->rate=rate;
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}
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reset();
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return 17;
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}
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void DivPlatformVERA::quit() {
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for (int i=0; i<17; i++) {
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delete oscBuf[i];
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}
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delete psg;
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delete pcm;
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}
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DivPlatformVERA::~DivPlatformVERA() {
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}
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