1008 lines
27 KiB
C++
1008 lines
27 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2024 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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#define _USE_MATH_DEFINES
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#include "amiga.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 AMIGA_DIVIDER 8
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#define AMIGA_VPMASK 7
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#define CHIP_DIVIDER 16
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#define chWrite(c,a,v) rWrite(((c)<<4)+0xa0+(a),(v));
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const char* regCheatSheetAmiga[]={
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"DMACON", "96",
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"INTENA", "9A",
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"ADKCON", "9E",
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"AUD0LCH", "A0",
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"AUD0LCL", "A2",
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"AUD0LEN", "A4",
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"AUD0PER", "A6",
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"AUD0VOL", "A8",
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"AUD0DAT", "AA",
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"AUD1LCH", "B0",
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"AUD1LCL", "B2",
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"AUD1LEN", "B4",
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"AUD1PER", "B6",
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"AUD1VOL", "B8",
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"AUD1DAT", "BA",
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"AUD2LCH", "C0",
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"AUD2LCL", "C2",
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"AUD2LEN", "C4",
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"AUD2PER", "C6",
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"AUD2VOL", "C8",
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"AUD2DAT", "CA",
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"AUD3LCH", "D0",
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"AUD3LCL", "D2",
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"AUD3LEN", "D4",
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"AUD3PER", "D6",
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"AUD3VOL", "D8",
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"AUD3DAT", "DA",
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NULL
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};
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const char** DivPlatformAmiga::getRegisterSheet() {
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return regCheatSheetAmiga;
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}
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#define writeAudDat(x) \
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chan[i].audDat=x; \
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if (i<3 && chan[i].useV) { \
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chan[i+1].outVol=(unsigned char)chan[i].audDat^0x80; \
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if (chan[i+1].outVol>64) chan[i+1].outVol=64; \
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} \
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if (i<3 && chan[i].useP) { \
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chan[i+1].freq=(unsigned char)chan[i].audDat^0x80; \
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if (chan[i+1].freq<AMIGA_DIVIDER) chan[i+1].freq=AMIGA_DIVIDER; \
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}
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void DivPlatformAmiga::acquire(short** buf, size_t len) {
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thread_local int outL, outR, output;
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for (size_t h=0; h<len; h++) {
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if (--delay<0) delay=0;
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if (!writes.empty() && delay<=0) {
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QueuedWrite w=writes.front();
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if (w.addr==0x96 && !(w.val&0x8000)) delay=4096/AMIGA_DIVIDER;
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amiga.write(w.addr,w.val);
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writes.pop();
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}
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bool hsync=bypassLimits;
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outL=0;
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outR=0;
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// TODO:
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// - improve DMA overrun behavior
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// - does V/P mod really work like that?
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amiga.volPos=(amiga.volPos+1)&AMIGA_VPMASK;
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if (!bypassLimits) {
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amiga.hPos+=AMIGA_DIVIDER;
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if (amiga.hPos>=228) {
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amiga.hPos-=228;
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hsync=true;
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}
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}
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for (int i=0; i<4; i++) {
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// run DMA
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if (amiga.audEn[i]) amiga.mustDMA[i]=true;
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if (amiga.dmaEn && amiga.mustDMA[i] && !amiga.audIr[i]) {
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amiga.audTick[i]-=AMIGA_DIVIDER;
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if (amiga.audTick[i]<0) {
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amiga.audTick[i]+=MAX(AMIGA_DIVIDER,amiga.audPer[i]);
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if (amiga.audByte[i]) {
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// read next samples
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if (!amiga.incLoc[i]) {
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amiga.audDat[0][i]=sampleMem[(amiga.dmaLoc[i])&chipMask];
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amiga.audDat[1][i]=sampleMem[(amiga.dmaLoc[i]+1)&chipMask];
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amiga.incLoc[i]=true;
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}
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amiga.audWord[i]=!amiga.audWord[i];
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}
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amiga.mustDMA[i]=amiga.audEn[i];
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amiga.audByte[i]=!amiga.audByte[i];
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if (!amiga.audByte[i] && (amiga.useV[i] || amiga.useP[i])) {
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amiga.nextOut2[i]=((unsigned char)amiga.audDat[0][i])<<8|((unsigned char)amiga.audDat[1][i]);
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if (i<3) {
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if (amiga.useV[i] && amiga.useP[i]) {
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if (amiga.audWord[i]) {
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amiga.audPer[i+1]=amiga.nextOut2[i];
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} else {
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amiga.audVol[i+1]=amiga.nextOut2[i];
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}
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} else if (amiga.useV[i]) {
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amiga.audVol[i+1]=amiga.nextOut2[i];
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} else {
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amiga.audPer[i+1]=amiga.nextOut2[i];
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}
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}
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} else if (!amiga.useV[i] && !amiga.useP[i]) {
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amiga.nextOut[i]=amiga.audDat[amiga.audByte[i]][i];
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}
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}
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if (hsync) {
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if (amiga.incLoc[i]) {
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amiga.incLoc[i]=false;
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amiga.dmaLoc[i]+=2;
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// check for length
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if ((--amiga.dmaLen[i])==0) {
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if (amiga.audInt[i]) {
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amiga.audIr[i]=true;
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irq(i);
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}
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amiga.dmaLoc[i]=amiga.audLoc[i];
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amiga.dmaLen[i]=amiga.audLen[i];
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}
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}
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}
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}
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// output
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if (!isMuted[i]) {
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if ((amiga.audVol[i]&127)>=64) {
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output=amiga.nextOut[i]<<6;
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} else if ((amiga.audVol[i]&127)==0) {
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output=0;
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} else {
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output=amiga.nextOut[i]*volTable[amiga.audVol[i]&63][amiga.volPos];
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}
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if (i==0 || i==3) {
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outL+=(output*sep1)>>7;
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outR+=(output*sep2)>>7;
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} else {
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outL+=(output*sep2)>>7;
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outR+=(output*sep1)>>7;
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}
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oscBuf[i]->data[oscBuf[i]->needle++]=(amiga.nextOut[i]*MIN(64,amiga.audVol[i]&127))<<1;
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} else {
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oscBuf[i]->data[oscBuf[i]->needle++]=0;
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}
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}
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filter[0][0]+=(filtConst*(outL-filter[0][0]))>>12;
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filter[0][1]+=(filtConst*(filter[0][0]-filter[0][1]))>>12;
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filter[1][0]+=(filtConst*(outR-filter[1][0]))>>12;
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filter[1][1]+=(filtConst*(filter[1][0]-filter[1][1]))>>12;
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buf[0][h]=filter[0][1];
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buf[1][h]=filter[1][1];
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}
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}
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void DivPlatformAmiga::irq(int ch) {
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// disable interrupt
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rWrite(0x9a,128<<ch);
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if (chan[ch].irLocL==0x400 && chan[ch].irLocH==0 && chan[ch].irLen==1) {
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// turn off DMA
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rWrite(0x96,1<<ch);
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}
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// acknowledge interrupt
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rWrite(0x9c,128<<ch);
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}
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#define UPDATE_DMA(x) \
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dmaLen[x]=audLen[x]; \
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dmaLoc[x]=audLoc[x]; \
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audByte[x]=true; \
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audTick[x]=0;
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void DivPlatformAmiga::Amiga::write(unsigned short addr, unsigned short val) {
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if (addr&1) return;
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switch (addr&0x1fe) {
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case 0x96: { // DMACON
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if (val&32768) {
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if (val&1) audEn[0]=true;
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if (val&2) audEn[1]=true;
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if (val&4) audEn[2]=true;
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if (val&8) audEn[3]=true;
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if (val&512) dmaEn=true;
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} else {
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if (val&1) {
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audEn[0]=false;
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}
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if (val&2) {
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audEn[1]=false;
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}
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if (val&4) {
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audEn[2]=false;
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}
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if (val&8) {
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audEn[3]=false;
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}
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if (val&512) {
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dmaEn=false;
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}
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}
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break;
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}
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case 0x9a: { // INTENA
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if (val&32768) {
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if (val&128) audInt[0]=true;
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if (val&256) audInt[1]=true;
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if (val&512) audInt[2]=true;
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if (val&1024) audInt[3]=true;
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} else {
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if (val&128) audInt[0]=false;
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if (val&256) audInt[1]=false;
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if (val&512) audInt[2]=false;
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if (val&1024) audInt[3]=false;
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}
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break;
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}
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case 0x9c: { // INTREQ
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if (val&32768) {
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if (val&128) {
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audIr[0]=true;
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}
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if (val&256) {
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audIr[1]=true;
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}
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if (val&512) {
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audIr[2]=true;
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}
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if (val&1024) {
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audIr[3]=true;
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}
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} else {
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if (val&128) audIr[0]=false;
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if (val&256) audIr[1]=false;
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if (val&512) audIr[2]=false;
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if (val&1024) audIr[3]=false;
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}
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break;
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}
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case 0x9e: { // ADKCON
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if (val&32768) {
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if (val&1) useV[0]=true;
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if (val&2) useV[1]=true;
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if (val&4) useV[2]=true;
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if (val&8) useV[3]=true;
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if (val&16) useP[0]=true;
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if (val&32) useP[1]=true;
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if (val&64) useP[2]=true;
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if (val&128) useP[3]=true;
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} else {
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if (val&1) useV[0]=false;
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if (val&2) useV[1]=false;
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if (val&4) useV[2]=false;
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if (val&8) useV[3]=false;
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if (val&16) useP[0]=false;
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if (val&32) useP[1]=false;
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if (val&64) useP[2]=false;
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if (val&128) useP[3]=false;
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}
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break;
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}
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default: { // AUDx
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if (addr>=0xa0 && addr<0xe0) {
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const unsigned char ch=((addr-0xa0)>>4)&3;
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bool updateDMA=false;
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switch (addr&15) {
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case 0: // LCH
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audLoc[ch]&=0xffff;
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audLoc[ch]|=val<<16;
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updateDMA=true;
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break;
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case 2: // LCL
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audLoc[ch]&=0xffff0000;
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audLoc[ch]|=val&0xfffe;
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updateDMA=true;
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break;
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case 4: // LEN
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audLen[ch]=val;
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updateDMA=true;
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break;
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case 6: // PER
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audPer[ch]=val;
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break;
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case 8: // VOL
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audVol[ch]=val;
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break;
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case 10: // DAT
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audDat[0][ch]=val&0xff;
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audDat[1][ch]=val>>8;
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break;
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}
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if (updateDMA && !mustDMA[ch]) {
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UPDATE_DMA(ch);
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}
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}
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break;
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}
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}
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}
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void DivPlatformAmiga::rWrite(unsigned short addr, unsigned short val) {
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if (addr&1) return;
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//logV("%.3x = %.4x",addr,val);
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if (!skipRegisterWrites) {
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writes.push(QueuedWrite(addr,val));
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regPool[addr>>1]=val;
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if (dumpWrites) {
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addWrite(addr,val);
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}
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}
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}
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void DivPlatformAmiga::updateWave(int ch) {
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for (int i=0; i<MIN(256,(chan[ch].audLen<<1)); i++) {
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sampleMem[(ch<<8)|i]=chan[ch].ws.output[i]^0x80;
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}
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}
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void DivPlatformAmiga::tick(bool sysTick) {
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for (int i=0; i<4; i++) {
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chan[i].std.next();
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if (chan[i].std.vol.had) {
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chan[i].outVol=((chan[i].vol%65)*MIN(64,chan[i].std.vol.val))>>6;
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chan[i].writeVol=true;
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}
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if (NEW_ARP_STRAT) {
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chan[i].handleArp();
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} else if (chan[i].std.arp.had) {
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chan[i].baseFreq=round(NOTE_PERIODIC_NOROUND(parent->calcArp(chan[i].note,chan[i].std.arp.val)));
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chan[i].freqChanged=true;
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}
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if (chan[i].useWave && chan[i].std.wave.had) {
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if (chan[i].wave!=chan[i].std.wave.val || chan[i].ws.activeChanged()) {
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chan[i].wave=chan[i].std.wave.val;
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chan[i].ws.changeWave1(chan[i].wave);
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chan[i].updateWave=true;
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}
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}
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if (chan[i].useWave && chan[i].active) {
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if (chan[i].ws.tick()) {
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chan[i].updateWave=true;
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}
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}
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if (chan[i].std.pitch.had) {
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if (chan[i].std.pitch.mode) {
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chan[i].pitch2+=chan[i].std.pitch.val;
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CLAMP_VAR(chan[i].pitch2,-32768,32767);
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} else {
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chan[i].pitch2=chan[i].std.pitch.val;
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}
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chan[i].freqChanged=true;
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}
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if (chan[i].std.phaseReset.had) {
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if (chan[i].std.phaseReset.val==1 && 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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unsigned short dmaOff=0;
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unsigned short dmaOn=0;
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for (int i=0; i<4; i++) {
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if (chan[i].keyOn || chan[i].keyOff) {
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chWrite(i,6,1);
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dmaOff|=1<<i;
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}
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}
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if (dmaOff) rWrite(0x96,dmaOff);
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for (int i=0; i<4; i++) {
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if (chan[i].updateWave) {
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chan[i].updateWave=false;
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updateWave(i);
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}
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}
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for (int i=0; i<4; i++) {
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double off=1.0;
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if (!chan[i].useWave && chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(chan[i].sample);
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if (s->centerRate<1) {
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off=1.0;
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} else {
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off=8363.0/(double)s->centerRate;
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}
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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//DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_AMIGA);
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chan[i].freq=off*parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
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if (chan[i].freq>4095) chan[i].freq=4095;
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if (chan[i].freq<0) chan[i].freq=0;
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chWrite(i,6,chan[i].freq);
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if (chan[i].keyOn) {
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if (chan[i].useWave) {
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rWrite(0x9a,(128<<i));
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chWrite(i,0,0);
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chWrite(i,2,i<<8);
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chWrite(i,4,chan[i].audLen);
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if (dumpWrites) {
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addWrite(0x200+i,i<<8);
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addWrite(0x204+i,chan[i].audLen);
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}
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dmaOn|=1<<i;
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} else {
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if (chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
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DivSample* s=parent->getSample(chan[i].sample);
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int start=chan[i].audPos&(~1);
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if (start>s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)) start=s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT);
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int len=s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)-start;
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if (len<0) len=0;
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if (len>131070) len=131070;
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len>>=1;
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start+=sampleOff[chan[i].sample];
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if (len<1) {
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chWrite(i,0,0);
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chWrite(i,2,0x400);
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chWrite(i,4,1);
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if (dumpWrites) {
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addWrite(0x200+i,0x400);
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addWrite(0x204+i,1);
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}
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} else {
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chWrite(i,0,start>>16);
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chWrite(i,2,start);
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chWrite(i,4,len);
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if (dumpWrites) {
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addWrite(0x200+i,start);
|
|
addWrite(0x204+i,len);
|
|
}
|
|
}
|
|
|
|
dmaOn|=1<<i;
|
|
if (s->isLoopable()) {
|
|
int loopPos=(sampleOff[chan[i].sample]+s->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT))&(~1);
|
|
int loopEnd=(s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT)-s->getLoopStartPosition(DIV_SAMPLE_DEPTH_8BIT))>>1;
|
|
chan[i].irLocH=loopPos>>16;
|
|
chan[i].irLocL=loopPos;
|
|
chan[i].irLen=MIN(65535,loopEnd);
|
|
} else {
|
|
chan[i].irLocH=0;
|
|
chan[i].irLocL=0x400;
|
|
chan[i].irLen=1;
|
|
}
|
|
rWrite(0x9a,0x8000|(128<<i));
|
|
} else {
|
|
chWrite(i,0,0);
|
|
chWrite(i,2,0x400);
|
|
chWrite(i,4,1);
|
|
if (dumpWrites) {
|
|
addWrite(0x200+i,0x400);
|
|
addWrite(0x204+i,1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (chan[i].keyOn) chan[i].keyOn=false;
|
|
if (chan[i].keyOff) chan[i].keyOff=false;
|
|
chan[i].freqChanged=false;
|
|
}
|
|
}
|
|
|
|
if (dmaOn) rWrite(0x96,0x8000|dmaOn);
|
|
|
|
for (int i=0; i<4; i++) {
|
|
if ((dmaOn&(1<<i)) && !chan[i].useWave) {
|
|
// write latched loc/len
|
|
if (dumpWrites) {
|
|
addWrite(0x200+i,(chan[i].irLocH<<16)|chan[i].irLocL);
|
|
addWrite(0x204+i,chan[i].irLen);
|
|
} else {
|
|
chWrite(i,0,chan[i].irLocH);
|
|
chWrite(i,2,chan[i].irLocL);
|
|
chWrite(i,4,chan[i].irLen);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int i=0; i<4; i++) {
|
|
if (chan[i].writeVol) {
|
|
chan[i].writeVol=false;
|
|
chWrite(i,8,chan[i].outVol);
|
|
}
|
|
}
|
|
|
|
if (updateADKCon) {
|
|
updateADKCon=false;
|
|
rWrite(0x9e,0xff);
|
|
rWrite(0x9e,(
|
|
0x8000|
|
|
(chan[0].useV?1:0)|
|
|
(chan[1].useV?2:0)|
|
|
(chan[2].useV?4:0)|
|
|
(chan[3].useV?8:0)|
|
|
(chan[0].useP?16:0)|
|
|
(chan[1].useP?32:0)|
|
|
(chan[2].useP?64:0)|
|
|
(chan[3].useP?128:0)
|
|
));
|
|
}
|
|
}
|
|
|
|
int DivPlatformAmiga::dispatch(DivCommand c) {
|
|
switch (c.cmd) {
|
|
case DIV_CMD_NOTE_ON: {
|
|
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA);
|
|
if (ins->amiga.useWave) {
|
|
if (!chan[c.chan].useWave) chan[c.chan].updateWave=true;
|
|
chan[c.chan].useWave=true;
|
|
chan[c.chan].audLen=(ins->amiga.waveLen+1)>>1;
|
|
if (chan[c.chan].insChanged) {
|
|
if (chan[c.chan].wave<0) {
|
|
chan[c.chan].wave=0;
|
|
chan[c.chan].ws.setWidth(chan[c.chan].audLen<<1);
|
|
chan[c.chan].ws.changeWave1(chan[c.chan].wave);
|
|
chan[c.chan].updateWave=true;
|
|
}
|
|
}
|
|
chan[c.chan].sampleNote=DIV_NOTE_NULL;
|
|
chan[c.chan].sampleNoteDelta=0;
|
|
} else {
|
|
if (c.value!=DIV_NOTE_NULL) {
|
|
chan[c.chan].sample=ins->amiga.getSample(c.value);
|
|
chan[c.chan].sampleNote=c.value;
|
|
c.value=ins->amiga.getFreq(c.value);
|
|
chan[c.chan].sampleNoteDelta=c.value-chan[c.chan].sampleNote;
|
|
}
|
|
chan[c.chan].useWave=false;
|
|
}
|
|
if (c.value!=DIV_NOTE_NULL) {
|
|
chan[c.chan].baseFreq=round(NOTE_PERIODIC_NOROUND(c.value));
|
|
}
|
|
if (chan[c.chan].useWave || chan[c.chan].sample<0 || chan[c.chan].sample>=parent->song.sampleLen) {
|
|
chan[c.chan].sample=-1;
|
|
}
|
|
if (chan[c.chan].setPos) {
|
|
chan[c.chan].setPos=false;
|
|
} else {
|
|
chan[c.chan].audPos=0;
|
|
}
|
|
chan[c.chan].audSub=0;
|
|
if (c.value!=DIV_NOTE_NULL) {
|
|
chan[c.chan].freqChanged=true;
|
|
chan[c.chan].note=c.value;
|
|
}
|
|
chan[c.chan].active=true;
|
|
chan[c.chan].keyOn=true;
|
|
chan[c.chan].macroInit(ins);
|
|
if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
|
|
chan[c.chan].outVol=chan[c.chan].vol;
|
|
chan[c.chan].writeVol=true;
|
|
}
|
|
if (chan[c.chan].useWave) {
|
|
chan[c.chan].ws.init(ins,chan[c.chan].audLen<<1,255,chan[c.chan].insChanged);
|
|
chan[c.chan].updateWave=true;
|
|
}
|
|
chan[c.chan].insChanged=false;
|
|
break;
|
|
}
|
|
case DIV_CMD_NOTE_OFF:
|
|
chan[c.chan].sample=-1;
|
|
chan[c.chan].active=false;
|
|
chan[c.chan].keyOff=true;
|
|
chan[c.chan].macroInit(NULL);
|
|
break;
|
|
case DIV_CMD_NOTE_OFF_ENV:
|
|
case DIV_CMD_ENV_RELEASE:
|
|
chan[c.chan].std.release();
|
|
break;
|
|
case DIV_CMD_INSTRUMENT:
|
|
if (chan[c.chan].ins!=c.value || c.value2==1) {
|
|
chan[c.chan].ins=c.value;
|
|
chan[c.chan].insChanged=true;
|
|
}
|
|
break;
|
|
case DIV_CMD_VOLUME:
|
|
if (chan[c.chan].vol!=c.value) {
|
|
chan[c.chan].vol=c.value;
|
|
if (!chan[c.chan].std.vol.has) {
|
|
chan[c.chan].outVol=c.value;
|
|
chan[c.chan].writeVol=true;
|
|
}
|
|
}
|
|
break;
|
|
case DIV_CMD_GET_VOLUME:
|
|
if (chan[c.chan].std.vol.has) {
|
|
return chan[c.chan].vol;
|
|
}
|
|
return chan[c.chan].outVol;
|
|
break;
|
|
case DIV_CMD_PITCH:
|
|
chan[c.chan].pitch=c.value;
|
|
chan[c.chan].freqChanged=true;
|
|
break;
|
|
case DIV_CMD_WAVE:
|
|
if (!chan[c.chan].useWave) break;
|
|
chan[c.chan].wave=c.value;
|
|
chan[c.chan].keyOn=true;
|
|
chan[c.chan].ws.changeWave1(chan[c.chan].wave);
|
|
chan[c.chan].updateWave=true;
|
|
break;
|
|
case DIV_CMD_NOTE_PORTA: {
|
|
int destFreq=round(NOTE_PERIODIC_NOROUND(c.value2+chan[c.chan].sampleNoteDelta));
|
|
bool return2=false;
|
|
if (destFreq>chan[c.chan].baseFreq) {
|
|
chan[c.chan].baseFreq+=c.value;
|
|
if (chan[c.chan].baseFreq>=destFreq) {
|
|
chan[c.chan].baseFreq=destFreq;
|
|
return2=true;
|
|
}
|
|
} else {
|
|
chan[c.chan].baseFreq-=c.value;
|
|
if (chan[c.chan].baseFreq<=destFreq) {
|
|
chan[c.chan].baseFreq=destFreq;
|
|
return2=true;
|
|
}
|
|
}
|
|
chan[c.chan].freqChanged=true;
|
|
if (return2) {
|
|
chan[c.chan].inPorta=false;
|
|
return 2;
|
|
}
|
|
break;
|
|
}
|
|
case DIV_CMD_LEGATO: {
|
|
chan[c.chan].baseFreq=round(NOTE_PERIODIC_NOROUND(c.value+chan[c.chan].sampleNoteDelta+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val):(0))));
|
|
chan[c.chan].freqChanged=true;
|
|
chan[c.chan].note=c.value;
|
|
break;
|
|
}
|
|
case DIV_CMD_PRE_PORTA:
|
|
if (chan[c.chan].active && c.value2) {
|
|
if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_AMIGA));
|
|
}
|
|
if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will && !NEW_ARP_STRAT) chan[c.chan].baseFreq=NOTE_PERIODIC(chan[c.chan].note);
|
|
chan[c.chan].inPorta=c.value;
|
|
break;
|
|
case DIV_CMD_SAMPLE_POS:
|
|
if (chan[c.chan].useWave) break;
|
|
chan[c.chan].audPos=c.value;
|
|
if (chan[c.chan].active) chan[c.chan].keyOn=true;
|
|
chan[c.chan].setPos=true;
|
|
break;
|
|
case DIV_CMD_AMIGA_FILTER:
|
|
filterOn=c.value;
|
|
filtConst=filterOn?filtConstOn:filtConstOff;
|
|
break;
|
|
case DIV_CMD_AMIGA_AM:
|
|
chan[c.chan].useV=c.value;
|
|
updateADKCon=true;
|
|
break;
|
|
case DIV_CMD_AMIGA_PM:
|
|
chan[c.chan].useP=c.value;
|
|
updateADKCon=true;
|
|
break;
|
|
case DIV_CMD_GET_VOLMAX:
|
|
return 64;
|
|
break;
|
|
case DIV_CMD_MACRO_OFF:
|
|
chan[c.chan].std.mask(c.value,true);
|
|
break;
|
|
case DIV_CMD_MACRO_ON:
|
|
chan[c.chan].std.mask(c.value,false);
|
|
break;
|
|
case DIV_CMD_MACRO_RESTART:
|
|
chan[c.chan].std.restart(c.value);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
void DivPlatformAmiga::muteChannel(int ch, bool mute) {
|
|
isMuted[ch]=mute;
|
|
}
|
|
|
|
void DivPlatformAmiga::forceIns() {
|
|
for (int i=0; i<4; i++) {
|
|
chan[i].insChanged=true;
|
|
chan[i].freqChanged=true;
|
|
chan[i].writeVol=true;
|
|
/*chan[i].keyOn=false;
|
|
chan[i].keyOff=false;
|
|
chan[i].sample=-1;*/
|
|
if (!chan[i].useWave) {
|
|
rWrite(0x96,1<<i);
|
|
}
|
|
}
|
|
}
|
|
|
|
void* DivPlatformAmiga::getChanState(int ch) {
|
|
return &chan[ch];
|
|
}
|
|
|
|
DivDispatchOscBuffer* DivPlatformAmiga::getOscBuffer(int ch) {
|
|
return oscBuf[ch];
|
|
}
|
|
|
|
void DivPlatformAmiga::reset() {
|
|
writes.clear();
|
|
memset(regPool,0,256*sizeof(unsigned short));
|
|
for (int i=0; i<4; i++) {
|
|
chan[i]=DivPlatformAmiga::Channel();
|
|
chan[i].std.setEngine(parent);
|
|
chan[i].ws.setEngine(parent);
|
|
chan[i].ws.init(NULL,32,255);
|
|
filter[0][i]=0;
|
|
filter[1][i]=0;
|
|
}
|
|
filterOn=false;
|
|
filtConst=filterOn?filtConstOn:filtConstOff;
|
|
updateADKCon=true;
|
|
delay=0;
|
|
|
|
amiga=Amiga();
|
|
// enable DMA
|
|
rWrite(0x96,0x8200);
|
|
}
|
|
|
|
int DivPlatformAmiga::getOutputCount() {
|
|
return 2;
|
|
}
|
|
|
|
bool DivPlatformAmiga::keyOffAffectsArp(int ch) {
|
|
return true;
|
|
}
|
|
|
|
DivMacroInt* DivPlatformAmiga::getChanMacroInt(int ch) {
|
|
return &chan[ch].std;
|
|
}
|
|
|
|
DivSamplePos DivPlatformAmiga::getSamplePos(int ch) {
|
|
if (ch>=4) return DivSamplePos();
|
|
if (chan[ch].sample<0 || chan[ch].sample>=parent->song.sampleLen) return DivSamplePos();
|
|
int audPer=amiga.audPer[ch];
|
|
if (audPer<1) audPer=1;
|
|
return DivSamplePos(
|
|
chan[ch].sample,
|
|
amiga.dmaLoc[ch]-sampleOff[chan[ch].sample],
|
|
chipClock/audPer
|
|
);
|
|
}
|
|
|
|
void DivPlatformAmiga::notifyInsChange(int ins) {
|
|
for (int i=0; i<4; i++) {
|
|
if (chan[i].ins==ins) {
|
|
chan[i].insChanged=true;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DivPlatformAmiga::notifyWaveChange(int wave) {
|
|
for (int i=0; i<4; i++) {
|
|
if (chan[i].useWave && chan[i].wave==wave) {
|
|
chan[i].ws.changeWave1(wave);
|
|
chan[i].updateWave=true;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DivPlatformAmiga::notifyInsDeletion(void* ins) {
|
|
for (int i=0; i<4; i++) {
|
|
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
|
|
}
|
|
}
|
|
|
|
void DivPlatformAmiga::setFlags(const DivConfig& flags) {
|
|
if (flags.getInt("clockSel",0)) {
|
|
chipClock=COLOR_PAL*4.0/5.0;
|
|
} else {
|
|
chipClock=COLOR_NTSC;
|
|
}
|
|
CHECK_CUSTOM_CLOCK;
|
|
|
|
rate=chipClock/AMIGA_DIVIDER;
|
|
for (int i=0; i<4; i++) {
|
|
oscBuf[i]->rate=rate;
|
|
}
|
|
int sep=flags.getInt("stereoSep",0)&127;
|
|
sep1=sep+127;
|
|
sep2=127-sep;
|
|
amigaModel=flags.getInt("chipType",0);
|
|
chipMem=flags.getInt("chipMem",21);
|
|
if (chipMem<18) chipMem=18;
|
|
if (chipMem>21) chipMem=21;
|
|
chipMask=(1<<chipMem)-1;
|
|
bypassLimits=flags.getBool("bypassLimits",false);
|
|
if (amigaModel) {
|
|
filtConstOff=4000;
|
|
filtConstOn=sin(M_PI*8000.0/(double)rate)*4096.0;
|
|
} else {
|
|
filtConstOff=sin(M_PI*16000.0/(double)rate)*4096.0;
|
|
filtConstOn=sin(M_PI*5500.0/(double)rate)*4096.0;
|
|
}
|
|
}
|
|
|
|
void DivPlatformAmiga::poke(unsigned int addr, unsigned short val) {
|
|
rWrite(addr,val);
|
|
}
|
|
|
|
void DivPlatformAmiga::poke(std::vector<DivRegWrite>& wlist) {
|
|
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
|
|
}
|
|
|
|
unsigned char* DivPlatformAmiga::getRegisterPool() {
|
|
// update DMACONR
|
|
regPool[1]=(
|
|
(amiga.audEn[0]?1:0)|
|
|
(amiga.audEn[1]?2:0)|
|
|
(amiga.audEn[2]?4:0)|
|
|
(amiga.audEn[3]?8:0)|
|
|
(amiga.dmaEn?512:0)
|
|
);
|
|
|
|
// update ADKCONR
|
|
regPool[0x10>>1]=(
|
|
(amiga.useV[0]?1:0)|
|
|
(amiga.useV[1]?2:0)|
|
|
(amiga.useV[2]?4:0)|
|
|
(amiga.useV[3]?8:0)|
|
|
(amiga.useP[0]?16:0)|
|
|
(amiga.useP[1]?32:0)|
|
|
(amiga.useP[2]?64:0)|
|
|
(amiga.useP[3]?128:0)
|
|
);
|
|
|
|
// update INTENAR
|
|
regPool[0x1c>>1]=(
|
|
(amiga.audInt[0]?128:0)|
|
|
(amiga.audInt[1]?256:0)|
|
|
(amiga.audInt[2]?512:0)|
|
|
(amiga.audInt[3]?1024:0)|
|
|
16384 // INTEN
|
|
);
|
|
|
|
// update INTREQR
|
|
regPool[0x1e>>1]=(
|
|
(amiga.audIr[0]?128:0)|
|
|
(amiga.audIr[1]?256:0)|
|
|
(amiga.audIr[2]?512:0)|
|
|
(amiga.audIr[3]?1024:0)
|
|
);
|
|
|
|
return (unsigned char*)regPool;
|
|
}
|
|
|
|
int DivPlatformAmiga::getRegisterPoolSize() {
|
|
return 128;
|
|
}
|
|
|
|
int DivPlatformAmiga::getRegisterPoolDepth() {
|
|
return 16;
|
|
}
|
|
|
|
const void* DivPlatformAmiga::getSampleMem(int index) {
|
|
return index == 0 ? sampleMem : NULL;
|
|
}
|
|
|
|
size_t DivPlatformAmiga::getSampleMemCapacity(int index) {
|
|
return index == 0 ? (1<<chipMem) : 0;
|
|
}
|
|
|
|
size_t DivPlatformAmiga::getSampleMemUsage(int index) {
|
|
return index == 0 ? sampleMemLen : 0;
|
|
}
|
|
|
|
bool DivPlatformAmiga::isSampleLoaded(int index, int sample) {
|
|
if (index!=0) return false;
|
|
if (sample<0 || sample>255) return false;
|
|
return sampleLoaded[sample];
|
|
}
|
|
|
|
const DivMemoryComposition* DivPlatformAmiga::getMemCompo(int index) {
|
|
if (index!=0) return NULL;
|
|
return &memCompo;
|
|
}
|
|
|
|
void DivPlatformAmiga::renderSamples(int sysID) {
|
|
memset(sampleMem,0,2097152);
|
|
memset(sampleOff,0,256*sizeof(unsigned int));
|
|
memset(sampleLoaded,0,256*sizeof(bool));
|
|
|
|
memCompo=DivMemoryComposition();
|
|
memCompo.name="Chip Memory";
|
|
|
|
memCompo.entries.push_back(DivMemoryEntry(DIV_MEMORY_WAVE_RAM,"Wave RAM",-1,0,1024));
|
|
memCompo.entries.push_back(DivMemoryEntry(DIV_MEMORY_RESERVED,"End of Sample",-1,1024,1026));
|
|
|
|
// first 1024 bytes reserved for wavetable
|
|
// the next 2 bytes are reserved for end of sample
|
|
size_t memPos=1026;
|
|
for (int i=0; i<parent->song.sampleLen; i++) {
|
|
DivSample* s=parent->song.sample[i];
|
|
if (!s->renderOn[0][sysID]) {
|
|
sampleOff[i]=0;
|
|
continue;
|
|
}
|
|
|
|
if (memPos>=getSampleMemCapacity()) {
|
|
logW("out of Amiga memory for sample %d!",i);
|
|
break;
|
|
}
|
|
|
|
int length=s->getLoopEndPosition(DIV_SAMPLE_DEPTH_8BIT);
|
|
int actualLength=MIN((int)(getSampleMemCapacity()-memPos),length);
|
|
if (actualLength>0) {
|
|
sampleOff[i]=memPos;
|
|
memcpy(&sampleMem[memPos],s->data8,actualLength);
|
|
memCompo.entries.push_back(DivMemoryEntry(DIV_MEMORY_SAMPLE,"Sample",i,memPos,memPos+actualLength));
|
|
memPos+=actualLength;
|
|
}
|
|
// align memPos to short
|
|
if (memPos&1) memPos++;
|
|
sampleLoaded[i]=true;
|
|
}
|
|
sampleMemLen=memPos;
|
|
|
|
memCompo.capacity=1<<chipMem;
|
|
memCompo.used=sampleMemLen;
|
|
}
|
|
|
|
int DivPlatformAmiga::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
|
|
parent=p;
|
|
dumpWrites=false;
|
|
skipRegisterWrites=false;
|
|
for (int i=0; i<4; i++) {
|
|
oscBuf[i]=new DivDispatchOscBuffer;
|
|
isMuted[i]=false;
|
|
}
|
|
|
|
// Paula volume is implemented using PWM rather than a multiplication.
|
|
// sources:
|
|
// - https://www.youtube.com/watch?v=xyQlmsD7PAg
|
|
// - https://linusakesson.net/music/paulimba/index.php
|
|
memset(volTable,0,64*64);
|
|
for (int i=0; i<64; i++) {
|
|
for (int j=0; j<64; j++) {
|
|
volTable[i][j/AMIGA_DIVIDER]+=(j<i)*(64/AMIGA_DIVIDER);
|
|
}
|
|
}
|
|
|
|
sampleMem=new unsigned char[2097152];
|
|
sampleMemLen=0;
|
|
|
|
setFlags(flags);
|
|
reset();
|
|
return 6;
|
|
}
|
|
|
|
void DivPlatformAmiga::quit() {
|
|
delete[] sampleMem;
|
|
for (int i=0; i<4; i++) {
|
|
delete oscBuf[i];
|
|
}
|
|
}
|