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https://github.com/tildearrow/furnace.git
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it plays notes
This commit is contained in:
tildearrow
parent
740521b469
commit
e05db17ce2
3 changed files with 79 additions and 69 deletions
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@ -4,15 +4,14 @@
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#include <string.h>
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#include <math.h>
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#define rWrite(a,v) if (!skipRegisterWrites) {pendingWrites[a]=v;}
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#define immWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v);}
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#define rWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v);}
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#define PSG_FREQ_BASE 6848.0f
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#define PSG_FREQ_BASE 122240.0f
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void DivPlatformSAA1099::acquire(short* bufL, short* bufR, size_t start, size_t len) {
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if (ayBufLen<len) {
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ayBufLen=len;
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for (int i=0; i<3; i++) {
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for (int i=0; i<2; i++) {
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delete[] ayBuf[i];
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ayBuf[i]=new short[ayBufLen];
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}
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@ -25,22 +24,21 @@ void DivPlatformSAA1099::acquire(short* bufL, short* bufR, size_t start, size_t
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}
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saa.sound_stream_update(ayBuf,len);
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for (size_t i=0; i<len; i++) {
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bufL[i+start]=ayBuf[0][i]+ayBuf[1][i]+ayBuf[2][i];
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bufR[i+start]=ayBuf[0][i]+ayBuf[1][i]+ayBuf[2][i];
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bufL[i+start]=ayBuf[0][i];
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bufR[i+start]=ayBuf[1][i];
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}
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}
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void DivPlatformSAA1099::tick() {
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// PSG
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for (int i=0; i<3; i++) {
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for (int i=0; i<6; i++) {
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chan[i].std.next();
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if (chan[i].std.hadVol) {
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chan[i].outVol=chan[i].std.vol-(15-chan[i].vol);
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if (chan[i].outVol<0) chan[i].outVol=0;
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if (isMuted[i]) {
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rWrite(0x08+i,0);
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rWrite(i,0);
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} else {
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rWrite(0x08+i,(chan[i].outVol&15)|((chan[i].psgMode&4)<<2));
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rWrite(i,(chan[i].outVol&15));
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}
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}
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if (chan[i].std.hadArp) {
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@ -67,29 +65,56 @@ void DivPlatformSAA1099::tick() {
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}
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if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
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chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true);
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if (chan[i].freq>=32768) {
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chan[i].freqH=7;
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} else if (chan[i].freq>=16384) {
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chan[i].freqH=6;
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} else if (chan[i].freq>=8192) {
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chan[i].freqH=5;
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} else if (chan[i].freq>=4096) {
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chan[i].freqH=4;
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} else if (chan[i].freq>=2048) {
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chan[i].freqH=3;
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} else if (chan[i].freq>=1024) {
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chan[i].freqH=2;
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} else if (chan[i].freq>=512) {
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chan[i].freqH=1;
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} else {
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chan[i].freqH=0;
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}
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chan[i].freqL=0xff-(chan[i].freq>>chan[i].freqH);
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chan[i].freqH=7-chan[i].freqH;
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if (chan[i].freq>4095) chan[i].freq=4095;
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if (chan[i].keyOn) {
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//rWrite(16+i*5+1,((chan[i].duty&3)<<6)|(63-(ins->gb.soundLen&63)));
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//rWrite(16+i*5+2,((chan[i].vol<<4))|(ins->gb.envLen&7)|((ins->gb.envDir&1)<<3));
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}
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if (chan[i].keyOff) {
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rWrite(0x08+i,0);
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rWrite(i,0);
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}
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rWrite((i)<<1,chan[i].freq&0xff);
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rWrite(1+((i)<<1),chan[i].freq>>8);
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rWrite(0x08+i,chan[i].freqL);
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rWrite(0x10+(i>>1),chan[i&2].freqH|(chan[1+(i&2)].freqH<<4));
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if (chan[i].keyOn) chan[i].keyOn=false;
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if (chan[i].keyOff) chan[i].keyOff=false;
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chan[i].freqChanged=false;
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}
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}
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rWrite(0x07,
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~((chan[0].psgMode&1)|
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rWrite(0x14,(chan[0].psgMode&1)|
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((chan[1].psgMode&1)<<1)|
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((chan[2].psgMode&1)<<2)|
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((chan[0].psgMode&2)<<2)|
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((chan[1].psgMode&2)<<3)|
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((chan[2].psgMode&2)<<4)));
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((chan[3].psgMode&1)<<3)|
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((chan[4].psgMode&1)<<4)|
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((chan[5].psgMode&1)<<5)
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);
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rWrite(0x15,((chan[0].psgMode&2)>>1)|
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(chan[1].psgMode&2)|
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((chan[2].psgMode&2)<<1)|
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((chan[3].psgMode&2)<<2)|
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((chan[4].psgMode&2)<<3)|
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((chan[5].psgMode&2)<<4)
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);
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if (ayEnvSlide!=0) {
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ayEnvSlideLow+=ayEnvSlide;
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@ -97,26 +122,19 @@ void DivPlatformSAA1099::tick() {
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ayEnvSlideLow-=8;
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if (ayEnvPeriod<0xffff) {
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ayEnvPeriod++;
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immWrite(0x0b,ayEnvPeriod);
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immWrite(0x0c,ayEnvPeriod>>8);
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rWrite(0x0b,ayEnvPeriod);
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rWrite(0x0c,ayEnvPeriod>>8);
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}
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}
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while (ayEnvSlideLow<-7) {
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ayEnvSlideLow+=8;
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if (ayEnvPeriod>0) {
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ayEnvPeriod--;
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immWrite(0x0b,ayEnvPeriod);
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immWrite(0x0c,ayEnvPeriod>>8);
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rWrite(0x0b,ayEnvPeriod);
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rWrite(0x0c,ayEnvPeriod>>8);
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}
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}
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}
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for (int i=0; i<16; i++) {
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if (pendingWrites[i]!=oldWrites[i]) {
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immWrite(i,pendingWrites[i]&0xff);
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oldWrites[i]=pendingWrites[i];
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}
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}
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}
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int DivPlatformSAA1099::dispatch(DivCommand c) {
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@ -130,9 +148,9 @@ int DivPlatformSAA1099::dispatch(DivCommand c) {
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chan[c.chan].keyOn=true;
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chan[c.chan].std.init(ins);
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if (isMuted[c.chan]) {
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rWrite(0x08+c.chan,0);
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rWrite(c.chan,0);
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} else {
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rWrite(0x08+c.chan,(chan[c.chan].vol&15)|((chan[c.chan].psgMode&4)<<2));
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rWrite(c.chan,(chan[c.chan].vol&15));
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}
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break;
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}
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@ -147,9 +165,9 @@ int DivPlatformSAA1099::dispatch(DivCommand c) {
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chan[c.chan].outVol=c.value;
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}
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if (isMuted[c.chan]) {
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rWrite(0x08+c.chan,0);
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rWrite(c.chan,0);
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} else {
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if (chan[c.chan].active) rWrite(0x08+c.chan,(chan[c.chan].vol&15)|((chan[c.chan].psgMode&4)<<2));
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if (chan[c.chan].active) rWrite(c.chan,(chan[c.chan].vol&15));
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}
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break;
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break;
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@ -208,23 +226,18 @@ int DivPlatformSAA1099::dispatch(DivCommand c) {
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} else {
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chan[c.chan].psgMode&=~4;
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}
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if (isMuted[c.chan]) {
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rWrite(0x08+c.chan,0);
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} else {
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rWrite(0x08+c.chan,(chan[c.chan].vol&15)|((chan[c.chan].psgMode&4)<<2));
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}
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break;
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case DIV_CMD_AY_ENVELOPE_LOW:
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ayEnvPeriod&=0xff00;
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ayEnvPeriod|=c.value;
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immWrite(0x0b,ayEnvPeriod);
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immWrite(0x0c,ayEnvPeriod>>8);
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rWrite(0x0b,ayEnvPeriod);
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rWrite(0x0c,ayEnvPeriod>>8);
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break;
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case DIV_CMD_AY_ENVELOPE_HIGH:
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ayEnvPeriod&=0xff;
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ayEnvPeriod|=c.value<<8;
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immWrite(0x0b,ayEnvPeriod);
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immWrite(0x0c,ayEnvPeriod>>8);
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rWrite(0x0b,ayEnvPeriod);
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rWrite(0x0c,ayEnvPeriod>>8);
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break;
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case DIV_CMD_AY_ENVELOPE_SLIDE:
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ayEnvSlide=c.value;
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@ -251,9 +264,9 @@ int DivPlatformSAA1099::dispatch(DivCommand c) {
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void DivPlatformSAA1099::muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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if (isMuted[ch]) {
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rWrite(0x08+ch,0);
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rWrite(ch,0);
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} else {
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rWrite(0x08+ch,(chan[ch].outVol&15)|((chan[ch].psgMode&4)<<2));
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rWrite(ch,(chan[ch].outVol&15));
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}
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}
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@ -261,24 +274,19 @@ void DivPlatformSAA1099::forceIns() {
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for (int i=0; i<3; i++) {
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chan[i].insChanged=true;
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}
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immWrite(0x0b,ayEnvPeriod);
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immWrite(0x0c,ayEnvPeriod>>8);
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immWrite(0x0d,ayEnvMode);
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rWrite(0x0b,ayEnvPeriod);
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rWrite(0x0c,ayEnvPeriod>>8);
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rWrite(0x0d,ayEnvMode);
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}
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void DivPlatformSAA1099::reset() {
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while (!writes.empty()) writes.pop();
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saa=saa1099_device();
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for (int i=0; i<3; i++) {
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for (int i=0; i<6; i++) {
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chan[i]=DivPlatformSAA1099::Channel();
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chan[i].vol=0x0f;
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}
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for (int i=0; i<16; i++) {
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oldWrites[i]=-1;
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pendingWrites[i]=-1;
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}
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lastBusy=60;
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dacMode=0;
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dacPeriod=0;
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@ -294,10 +302,12 @@ void DivPlatformSAA1099::reset() {
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delay=0;
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extMode=false;
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rWrite(0x1c,1);
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}
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bool DivPlatformSAA1099::isStereo() {
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return false;
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return true;
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}
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bool DivPlatformSAA1099::keyOffAffectsArp(int ch) {
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@ -305,7 +315,7 @@ bool DivPlatformSAA1099::keyOffAffectsArp(int ch) {
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}
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void DivPlatformSAA1099::notifyInsDeletion(void* ins) {
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for (int i=0; i<3; i++) {
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for (int i=0; i<6; i++) {
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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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@ -321,16 +331,16 @@ void DivPlatformSAA1099::setPAL(bool pal) {
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int DivPlatformSAA1099::init(DivEngine* p, int channels, int sugRate, bool pal) {
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parent=p;
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skipRegisterWrites=false;
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for (int i=0; i<3; i++) {
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for (int i=0; i<6; i++) {
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isMuted[i]=false;
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}
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setPAL(pal);
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ayBufLen=65536;
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for (int i=0; i<3; i++) ayBuf[i]=new short[ayBufLen];
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for (int i=0; i<2; i++) ayBuf[i]=new short[ayBufLen];
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reset();
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return 3;
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}
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void DivPlatformSAA1099::quit() {
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for (int i=0; i<3; i++) delete[] ayBuf[i];
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for (int i=0; i<2; i++) delete[] ayBuf[i];
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}
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@ -16,10 +16,10 @@ class DivPlatformSAA1099: public DivDispatch {
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int vol, outVol;
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unsigned char pan;
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DivMacroInt std;
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Channel(): freqH(0), freqL(0), freq(0), baseFreq(0), pitch(0), ins(-1), note(0), psgMode(1), active(false), insChanged(true), freqChanged(false), keyOn(false), keyOff(false), portaPause(false), inPorta(false), vol(0), outVol(15), pan(3) {}
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Channel(): freqH(0), freqL(0), freq(0), baseFreq(0), pitch(0), ins(-1), note(0), psgMode(1), active(false), insChanged(true), freqChanged(false), keyOn(false), keyOff(false), portaPause(false), inPorta(false), vol(0), outVol(15), pan(255) {}
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};
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Channel chan[3];
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bool isMuted[3];
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Channel chan[6];
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bool isMuted[6];
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struct QueuedWrite {
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unsigned short addr;
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unsigned char val;
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@ -47,7 +47,7 @@ class DivPlatformSAA1099: public DivDispatch {
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unsigned short ayEnvPeriod;
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short ayEnvSlideLow;
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short ayEnvSlide;
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short* ayBuf[3];
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short* ayBuf[2];
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size_t ayBufLen;
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public:
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@ -72,16 +72,16 @@
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#define BIT(x,n) (((x)>>(n))&1)
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static constexpr int clock_divider = 256;
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static constexpr int clock_divider = 32;
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static constexpr int LEFT = 0x00;
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static constexpr int RIGHT = 0x01;
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static constexpr unsigned short amplitude_lookup[16] = {
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0*32767/16, 1*32767/16, 2*32767/16, 3*32767/16,
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4*32767/16, 5*32767/16, 6*32767/16, 7*32767/16,
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8*32767/16, 9*32767/16, 10*32767/16, 11*32767/16,
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12*32767/16, 13*32767/16, 14*32767/16, 15*32767/16
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0*32767/96, 1*32767/96, 2*32767/96, 3*32767/96,
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4*32767/96, 5*32767/96, 6*32767/96, 7*32767/96,
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8*32767/96, 9*32767/96, 10*32767/96, 11*32767/96,
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12*32767/96, 13*32767/96, 14*32767/96, 15*32767/96
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};
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static constexpr unsigned char envelope[8][64] = {
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