prepare for SAA1099
This commit is contained in:
tildearrow
parent
390eb66647
commit
307665f531
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@ -66,6 +66,7 @@ extern/Nuked-OPN2/ym3438.c
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extern/opm/opm.c
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extern/opm/opm.c
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src/engine/platform/sound/sn76496.cpp
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src/engine/platform/sound/sn76496.cpp
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src/engine/platform/sound/ay8910.cpp
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src/engine/platform/sound/ay8910.cpp
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src/engine/platform/sound/saa1099.cpp
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src/engine/platform/sound/gb/apu.c
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src/engine/platform/sound/gb/apu.c
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src/engine/platform/sound/gb/timing.c
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src/engine/platform/sound/gb/timing.c
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src/engine/platform/sound/pce_psg.cpp
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src/engine/platform/sound/pce_psg.cpp
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@ -122,6 +123,7 @@ src/engine/platform/ym2610ext.cpp
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src/engine/platform/ay.cpp
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src/engine/platform/ay.cpp
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src/engine/platform/ay8930.cpp
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src/engine/platform/ay8930.cpp
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src/engine/platform/tia.cpp
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src/engine/platform/tia.cpp
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src/engine/platform/saa.cpp
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src/engine/platform/dummy.cpp)
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src/engine/platform/dummy.cpp)
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set(GUI_SOURCES
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set(GUI_SOURCES
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@ -12,6 +12,7 @@
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#include "platform/ay.h"
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#include "platform/ay.h"
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#include "platform/ay8930.h"
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#include "platform/ay8930.h"
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#include "platform/tia.h"
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#include "platform/tia.h"
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#include "platform/saa.h"
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#include "platform/dummy.h"
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#include "platform/dummy.h"
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#include "../ta-log.h"
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#include "../ta-log.h"
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@ -124,6 +125,9 @@ void DivDispatchContainer::init(DivSystem sys, DivEngine* eng, int chanCount, do
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case DIV_SYSTEM_TIA:
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case DIV_SYSTEM_TIA:
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dispatch=new DivPlatformTIA;
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dispatch=new DivPlatformTIA;
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break;
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break;
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case DIV_SYSTEM_SAA1099:
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dispatch=new DivPlatformSAA1099;
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break;
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default:
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default:
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logW("this system is not supported yet! using dummy platform.\n");
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logW("this system is not supported yet! using dummy platform.\n");
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dispatch=new DivPlatformDummy;
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dispatch=new DivPlatformDummy;
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336
src/engine/platform/saa.cpp
Normal file
336
src/engine/platform/saa.cpp
Normal file
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@ -0,0 +1,336 @@
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#include "saa.h"
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#include "../engine.h"
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#include "sound/saa1099.h"
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#include <string.h>
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#include <math.h>
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#define rWrite(a,v) if (!skipRegisterWrites) {pendingWrites[a]=v;}
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#define immWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v);}
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#define PSG_FREQ_BASE 6848.0f
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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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delete[] ayBuf[i];
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ayBuf[i]=new short[ayBufLen];
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}
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}
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while (!writes.empty()) {
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QueuedWrite w=writes.front();
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saa.control_w(w.addr);
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saa.data_w(w.val);
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writes.pop();
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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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}
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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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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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} else {
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rWrite(0x08+i,(chan[i].outVol&15)|((chan[i].psgMode&4)<<2));
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}
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}
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if (chan[i].std.hadArp) {
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if (!chan[i].inPorta) {
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if (chan[i].std.arpMode) {
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chan[i].baseFreq=round(PSG_FREQ_BASE/pow(2.0f,((float)(chan[i].std.arp)/12.0f)));
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} else {
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chan[i].baseFreq=round(PSG_FREQ_BASE/pow(2.0f,((float)(chan[i].note+chan[i].std.arp-12)/12.0f)));
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}
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}
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chan[i].freqChanged=true;
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} else {
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if (chan[i].std.arpMode && chan[i].std.finishedArp) {
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chan[i].baseFreq=round(PSG_FREQ_BASE/pow(2.0f,((float)(chan[i].note)/12.0f)));
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chan[i].freqChanged=true;
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}
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}
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if (chan[i].std.hadDuty) {
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rWrite(0x06,31-chan[i].std.duty);
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}
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if (chan[i].std.hadWave) {
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chan[i].psgMode&=4;
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chan[i].psgMode|=(chan[i].std.wave+1)&3;
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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>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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}
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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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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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((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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if (ayEnvSlide!=0) {
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ayEnvSlideLow+=ayEnvSlide;
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while (ayEnvSlideLow>7) {
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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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}
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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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}
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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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switch (c.cmd) {
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case DIV_CMD_NOTE_ON: {
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DivInstrument* ins=parent->getIns(chan[c.chan].ins);
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chan[c.chan].baseFreq=round(PSG_FREQ_BASE/pow(2.0f,((float)c.value/12.0f)));
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chan[c.chan].freqChanged=true;
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chan[c.chan].note=c.value;
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chan[c.chan].active=true;
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chan[c.chan].keyOn=true;
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chan[c.chan].std.init(ins);
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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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}
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case DIV_CMD_NOTE_OFF:
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chan[c.chan].keyOff=true;
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chan[c.chan].active=false;
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chan[c.chan].std.init(NULL);
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break;
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case DIV_CMD_VOLUME: {
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chan[c.chan].vol=c.value;
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if (!chan[c.chan].std.hasVol) {
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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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} 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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}
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break;
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break;
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}
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case DIV_CMD_GET_VOLUME: {
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return chan[c.chan].vol;
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break;
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}
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case DIV_CMD_INSTRUMENT:
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if (chan[c.chan].ins!=c.value) {
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chan[c.chan].insChanged=true;
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}
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chan[c.chan].ins=c.value;
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break;
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case DIV_CMD_PITCH: {
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chan[c.chan].pitch=c.value;
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chan[c.chan].freqChanged=true;
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break;
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}
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case DIV_CMD_NOTE_PORTA: {
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int destFreq=round(PSG_FREQ_BASE/pow(2.0f,((float)c.value2/12.0f)));
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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=round(PSG_FREQ_BASE/pow(2.0f,((float)c.value/12.0f)));
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chan[c.chan].freqChanged=true;
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break;
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}
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case DIV_CMD_STD_NOISE_FREQ:
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rWrite(0x06,31-c.value);
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break;
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case DIV_CMD_AY_ENVELOPE_SET:
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ayEnvMode=c.value>>4;
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rWrite(0x0d,ayEnvMode);
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if (c.value&15) {
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chan[c.chan].psgMode|=4;
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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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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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break;
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case DIV_CMD_AY_ENVELOPE_SLIDE:
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ayEnvSlide=c.value;
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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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case DIV_CMD_GET_VOLMAX:
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return 15;
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break;
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case DIV_CMD_PRE_PORTA:
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chan[c.chan].std.init(parent->getIns(chan[c.chan].ins));
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chan[c.chan].inPorta=c.value;
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break;
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case DIV_CMD_PRE_NOTE:
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break;
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default:
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//printf("WARNING: unimplemented command %d\n",c.cmd);
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break;
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}
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return 1;
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}
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void 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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} else {
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rWrite(0x08+ch,(chan[ch].outVol&15)|((chan[ch].psgMode&4)<<2));
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}
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}
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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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}
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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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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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dacPos=0;
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dacRate=0;
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dacSample=-1;
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sampleBank=0;
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ayEnvPeriod=0;
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ayEnvMode=0;
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ayEnvSlide=0;
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ayEnvSlideLow=0;
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delay=0;
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extMode=false;
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}
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bool DivPlatformSAA1099::isStereo() {
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return false;
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}
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bool DivPlatformSAA1099::keyOffAffectsArp(int ch) {
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return true;
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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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chan[i].std.notifyInsDeletion((DivInstrument*)ins);
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}
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}
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||||||
|
void DivPlatformSAA1099::setPAL(bool pal) {
|
||||||
|
if (pal) {
|
||||||
|
rate=250000;
|
||||||
|
} else {
|
||||||
|
rate=250000;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int DivPlatformSAA1099::init(DivEngine* p, int channels, int sugRate, bool pal) {
|
||||||
|
parent=p;
|
||||||
|
skipRegisterWrites=false;
|
||||||
|
for (int i=0; i<3; i++) {
|
||||||
|
isMuted[i]=false;
|
||||||
|
}
|
||||||
|
setPAL(pal);
|
||||||
|
ayBufLen=65536;
|
||||||
|
for (int i=0; i<3; i++) ayBuf[i]=new short[ayBufLen];
|
||||||
|
reset();
|
||||||
|
return 3;
|
||||||
|
}
|
||||||
|
|
||||||
|
void DivPlatformSAA1099::quit() {
|
||||||
|
for (int i=0; i<3; i++) delete[] ayBuf[i];
|
||||||
|
}
|
||||||
67
src/engine/platform/saa.h
Normal file
67
src/engine/platform/saa.h
Normal file
|
|
@ -0,0 +1,67 @@
|
||||||
|
#ifndef _SAA_H
|
||||||
|
#define _SAA_H
|
||||||
|
#include "../dispatch.h"
|
||||||
|
#include "../macroInt.h"
|
||||||
|
#include <queue>
|
||||||
|
#include "sound/saa1099.h"
|
||||||
|
|
||||||
|
class DivPlatformSAA1099: public DivDispatch {
|
||||||
|
protected:
|
||||||
|
struct Channel {
|
||||||
|
unsigned char freqH, freqL;
|
||||||
|
int freq, baseFreq, pitch;
|
||||||
|
unsigned char ins, note, psgMode;
|
||||||
|
signed char konCycles;
|
||||||
|
bool active, insChanged, freqChanged, keyOn, keyOff, portaPause, inPorta;
|
||||||
|
int vol, outVol;
|
||||||
|
unsigned char pan;
|
||||||
|
DivMacroInt std;
|
||||||
|
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) {}
|
||||||
|
};
|
||||||
|
Channel chan[3];
|
||||||
|
bool isMuted[3];
|
||||||
|
struct QueuedWrite {
|
||||||
|
unsigned short addr;
|
||||||
|
unsigned char val;
|
||||||
|
bool addrOrVal;
|
||||||
|
QueuedWrite(unsigned short a, unsigned char v): addr(a), val(v), addrOrVal(false) {}
|
||||||
|
};
|
||||||
|
std::queue<QueuedWrite> writes;
|
||||||
|
saa1099_device saa;
|
||||||
|
unsigned char lastBusy;
|
||||||
|
|
||||||
|
bool dacMode;
|
||||||
|
int dacPeriod;
|
||||||
|
int dacRate;
|
||||||
|
int dacPos;
|
||||||
|
int dacSample;
|
||||||
|
unsigned char sampleBank;
|
||||||
|
|
||||||
|
int delay;
|
||||||
|
|
||||||
|
bool extMode;
|
||||||
|
|
||||||
|
short oldWrites[16];
|
||||||
|
short pendingWrites[16];
|
||||||
|
unsigned char ayEnvMode;
|
||||||
|
unsigned short ayEnvPeriod;
|
||||||
|
short ayEnvSlideLow;
|
||||||
|
short ayEnvSlide;
|
||||||
|
short* ayBuf[3];
|
||||||
|
size_t ayBufLen;
|
||||||
|
|
||||||
|
public:
|
||||||
|
void acquire(short* bufL, short* bufR, size_t start, size_t len);
|
||||||
|
int dispatch(DivCommand c);
|
||||||
|
void reset();
|
||||||
|
void forceIns();
|
||||||
|
void tick();
|
||||||
|
void muteChannel(int ch, bool mute);
|
||||||
|
void setPAL(bool pal);
|
||||||
|
bool isStereo();
|
||||||
|
bool keyOffAffectsArp(int ch);
|
||||||
|
void notifyInsDeletion(void* ins);
|
||||||
|
int init(DivEngine* parent, int channels, int sugRate, bool pal);
|
||||||
|
void quit();
|
||||||
|
};
|
||||||
|
#endif
|
||||||
390
src/engine/platform/sound/saa1099.cpp
Normal file
390
src/engine/platform/sound/saa1099.cpp
Normal file
|
|
@ -0,0 +1,390 @@
|
||||||
|
// license:BSD-3-Clause
|
||||||
|
// copyright-holders:Juergen Buchmueller, Manuel Abadia
|
||||||
|
/***************************************************************************
|
||||||
|
|
||||||
|
Philips SAA1099 Sound driver
|
||||||
|
|
||||||
|
By Juergen Buchmueller and Manuel Abadia
|
||||||
|
|
||||||
|
SAA1099 register layout:
|
||||||
|
========================
|
||||||
|
|
||||||
|
offs | 7654 3210 | description
|
||||||
|
-----+-----------+---------------------------
|
||||||
|
0x00 | ---- xxxx | Amplitude channel 0 (left)
|
||||||
|
0x00 | xxxx ---- | Amplitude channel 0 (right)
|
||||||
|
0x01 | ---- xxxx | Amplitude channel 1 (left)
|
||||||
|
0x01 | xxxx ---- | Amplitude channel 1 (right)
|
||||||
|
0x02 | ---- xxxx | Amplitude channel 2 (left)
|
||||||
|
0x02 | xxxx ---- | Amplitude channel 2 (right)
|
||||||
|
0x03 | ---- xxxx | Amplitude channel 3 (left)
|
||||||
|
0x03 | xxxx ---- | Amplitude channel 3 (right)
|
||||||
|
0x04 | ---- xxxx | Amplitude channel 4 (left)
|
||||||
|
0x04 | xxxx ---- | Amplitude channel 4 (right)
|
||||||
|
0x05 | ---- xxxx | Amplitude channel 5 (left)
|
||||||
|
0x05 | xxxx ---- | Amplitude channel 5 (right)
|
||||||
|
| |
|
||||||
|
0x08 | xxxx xxxx | Frequency channel 0
|
||||||
|
0x09 | xxxx xxxx | Frequency channel 1
|
||||||
|
0x0a | xxxx xxxx | Frequency channel 2
|
||||||
|
0x0b | xxxx xxxx | Frequency channel 3
|
||||||
|
0x0c | xxxx xxxx | Frequency channel 4
|
||||||
|
0x0d | xxxx xxxx | Frequency channel 5
|
||||||
|
| |
|
||||||
|
0x10 | ---- -xxx | Channel 0 octave select
|
||||||
|
0x10 | -xxx ---- | Channel 1 octave select
|
||||||
|
0x11 | ---- -xxx | Channel 2 octave select
|
||||||
|
0x11 | -xxx ---- | Channel 3 octave select
|
||||||
|
0x12 | ---- -xxx | Channel 4 octave select
|
||||||
|
0x12 | -xxx ---- | Channel 5 octave select
|
||||||
|
| |
|
||||||
|
0x14 | ---- ---x | Channel 0 frequency enable (0 = off, 1 = on)
|
||||||
|
0x14 | ---- --x- | Channel 1 frequency enable (0 = off, 1 = on)
|
||||||
|
0x14 | ---- -x-- | Channel 2 frequency enable (0 = off, 1 = on)
|
||||||
|
0x14 | ---- x--- | Channel 3 frequency enable (0 = off, 1 = on)
|
||||||
|
0x14 | ---x ---- | Channel 4 frequency enable (0 = off, 1 = on)
|
||||||
|
0x14 | --x- ---- | Channel 5 frequency enable (0 = off, 1 = on)
|
||||||
|
| |
|
||||||
|
0x15 | ---- ---x | Channel 0 noise enable (0 = off, 1 = on)
|
||||||
|
0x15 | ---- --x- | Channel 1 noise enable (0 = off, 1 = on)
|
||||||
|
0x15 | ---- -x-- | Channel 2 noise enable (0 = off, 1 = on)
|
||||||
|
0x15 | ---- x--- | Channel 3 noise enable (0 = off, 1 = on)
|
||||||
|
0x15 | ---x ---- | Channel 4 noise enable (0 = off, 1 = on)
|
||||||
|
0x15 | --x- ---- | Channel 5 noise enable (0 = off, 1 = on)
|
||||||
|
| |
|
||||||
|
0x16 | ---- --xx | Noise generator parameters 0
|
||||||
|
0x16 | --xx ---- | Noise generator parameters 1
|
||||||
|
| |
|
||||||
|
0x18 | --xx xxxx | Envelope generator 0 parameters
|
||||||
|
0x18 | x--- ---- | Envelope generator 0 control enable (0 = off, 1 = on)
|
||||||
|
0x19 | --xx xxxx | Envelope generator 1 parameters
|
||||||
|
0x19 | x--- ---- | Envelope generator 1 control enable (0 = off, 1 = on)
|
||||||
|
| |
|
||||||
|
0x1c | ---- ---x | All channels enable (0 = off, 1 = on)
|
||||||
|
0x1c | ---- --x- | Synch & Reset generators
|
||||||
|
|
||||||
|
Unspecified bits should be written as zero.
|
||||||
|
|
||||||
|
***************************************************************************/
|
||||||
|
|
||||||
|
#include "saa1099.h"
|
||||||
|
#include <string>
|
||||||
|
|
||||||
|
#define BIT(x,n) (((x)>>(n))&1)
|
||||||
|
|
||||||
|
static constexpr int clock_divider = 256;
|
||||||
|
|
||||||
|
static constexpr int LEFT = 0x00;
|
||||||
|
static constexpr int RIGHT = 0x01;
|
||||||
|
|
||||||
|
static constexpr unsigned short amplitude_lookup[16] = {
|
||||||
|
0*32767/16, 1*32767/16, 2*32767/16, 3*32767/16,
|
||||||
|
4*32767/16, 5*32767/16, 6*32767/16, 7*32767/16,
|
||||||
|
8*32767/16, 9*32767/16, 10*32767/16, 11*32767/16,
|
||||||
|
12*32767/16, 13*32767/16, 14*32767/16, 15*32767/16
|
||||||
|
};
|
||||||
|
|
||||||
|
static constexpr unsigned char envelope[8][64] = {
|
||||||
|
/* zero amplitude */
|
||||||
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
|
||||||
|
/* maximum amplitude */
|
||||||
|
{15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
|
||||||
|
15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
|
||||||
|
15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
|
||||||
|
15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15, },
|
||||||
|
/* single decay */
|
||||||
|
{15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
|
||||||
|
/* repetitive decay */
|
||||||
|
{15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
||||||
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
||||||
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
||||||
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 },
|
||||||
|
/* single triangular */
|
||||||
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
||||||
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
|
||||||
|
/* repetitive triangular */
|
||||||
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
||||||
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
||||||
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
||||||
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 },
|
||||||
|
/* single attack */
|
||||||
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||||||
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
|
||||||
|
/* repetitive attack */
|
||||||
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
||||||
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
||||||
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
||||||
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 }
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
//**************************************************************************
|
||||||
|
// LIVE DEVICE
|
||||||
|
//**************************************************************************
|
||||||
|
|
||||||
|
//-------------------------------------------------
|
||||||
|
// saa1099_device - constructor
|
||||||
|
//-------------------------------------------------
|
||||||
|
|
||||||
|
saa1099_device::saa1099_device()
|
||||||
|
: m_noise_params{ 0, 0 }
|
||||||
|
, m_env_enable{ false, false }
|
||||||
|
, m_env_reverse_right{ false, false }
|
||||||
|
, m_env_mode{ 0, 0 }
|
||||||
|
, m_env_bits{ false, false }
|
||||||
|
, m_env_clock{ false, false }
|
||||||
|
, m_env_step{ 0, 0 }
|
||||||
|
, m_all_ch_enable(false)
|
||||||
|
, m_sync_state(false)
|
||||||
|
, m_selected_reg(0)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
//-------------------------------------------------
|
||||||
|
// device_start - device-specific startup
|
||||||
|
//-------------------------------------------------
|
||||||
|
|
||||||
|
void saa1099_device::device_start()
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
//-------------------------------------------------
|
||||||
|
// sound_stream_update - handle a stream update
|
||||||
|
//-------------------------------------------------
|
||||||
|
|
||||||
|
void saa1099_device::sound_stream_update(short** outputs, int len)
|
||||||
|
{
|
||||||
|
int j, ch;
|
||||||
|
/* if the channels are disabled we're done */
|
||||||
|
if (!m_all_ch_enable)
|
||||||
|
{
|
||||||
|
/* init output data */
|
||||||
|
memset(outputs[LEFT],0,len*sizeof(short));
|
||||||
|
memset(outputs[RIGHT],0,len*sizeof(short));
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (ch = 0; ch < 2; ch++)
|
||||||
|
{
|
||||||
|
switch (m_noise_params[ch])
|
||||||
|
{
|
||||||
|
case 0:
|
||||||
|
case 1:
|
||||||
|
case 2: m_noise[ch].freq = 256 << m_noise_params[ch]; break;
|
||||||
|
case 3: m_noise[ch].freq = m_channels[ch * 3].freq(); break; // todo: this case will be clock()/[ch*3's octave divisor, 0 is = 256*2, higher numbers are higher] * 2 if the tone generator phase reset bit (0x1c bit 1) is set.
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* fill all data needed */
|
||||||
|
for( j = 0; j < len; j++ )
|
||||||
|
{
|
||||||
|
int output_l = 0, output_r = 0;
|
||||||
|
|
||||||
|
/* for each channel */
|
||||||
|
for (ch = 0; ch < 6; ch++)
|
||||||
|
{
|
||||||
|
/* check the actual position in the square wave */
|
||||||
|
while (m_channels[ch].counter <= 0)
|
||||||
|
{
|
||||||
|
/* calculate new frequency now after the half wave is updated */
|
||||||
|
m_channels[ch].counter += m_channels[ch].freq();
|
||||||
|
m_channels[ch].level ^= 1;
|
||||||
|
|
||||||
|
/* eventually clock the envelope counters */
|
||||||
|
if (ch == 1 && m_env_clock[0] == 0)
|
||||||
|
envelope_w(0);
|
||||||
|
if (ch == 4 && m_env_clock[1] == 0)
|
||||||
|
envelope_w(1);
|
||||||
|
}
|
||||||
|
m_channels[ch].counter -= clock_divider;
|
||||||
|
|
||||||
|
// if the noise is enabled
|
||||||
|
unsigned char level = 0;
|
||||||
|
if (m_channels[ch].noise_enable)
|
||||||
|
{
|
||||||
|
// if the noise level is high (noise 0: chan 0-2, noise 1: chan 3-5)
|
||||||
|
level ^= m_noise[ch/3].level & 1;
|
||||||
|
}
|
||||||
|
// if the square wave is enabled
|
||||||
|
if (m_channels[ch].freq_enable)
|
||||||
|
{
|
||||||
|
// if the channel level is high
|
||||||
|
level ^= m_channels[ch].level & 1;
|
||||||
|
}
|
||||||
|
if (level)
|
||||||
|
{
|
||||||
|
output_l += m_channels[ch].amplitude[ LEFT] * m_channels[ch].envelope[ LEFT] / 16;
|
||||||
|
output_r += m_channels[ch].amplitude[RIGHT] * m_channels[ch].envelope[RIGHT] / 16;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
for (ch = 0; ch < 2; ch++)
|
||||||
|
{
|
||||||
|
/* update the state of the noise generator
|
||||||
|
* polynomial is x^18 + x^11 + x (i.e. 0x20400) and is a plain XOR, initial state is probably all 1s
|
||||||
|
* see http://www.vogons.org/viewtopic.php?f=9&t=51695 */
|
||||||
|
while (m_noise[ch].counter <= 0)
|
||||||
|
{
|
||||||
|
m_noise[ch].counter += m_noise[ch].freq; // clock / ((511 - frequency) * 2^(8 - octave)) or clock / 2^(8 + noise period)
|
||||||
|
if( ((m_noise[ch].level & 0x20000) == 0) != ((m_noise[ch].level & 0x0400) == 0) )
|
||||||
|
m_noise[ch].level = (m_noise[ch].level << 1) | 1;
|
||||||
|
else
|
||||||
|
m_noise[ch].level <<= 1;
|
||||||
|
}
|
||||||
|
m_noise[ch].counter -= clock_divider;
|
||||||
|
}
|
||||||
|
/* write sound data to the buffer */
|
||||||
|
outputs[LEFT][j]=output_l;
|
||||||
|
outputs[RIGHT][j]=output_r;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void saa1099_device::envelope_w(int ch)
|
||||||
|
{
|
||||||
|
if (m_env_enable[ch])
|
||||||
|
{
|
||||||
|
int step, mode, mask;
|
||||||
|
mode = m_env_mode[ch];
|
||||||
|
/* step from 0..63 and then loop in steps 32..63 */
|
||||||
|
step = m_env_step[ch] =
|
||||||
|
((m_env_step[ch] + 1) & 0x3f) | (m_env_step[ch] & 0x20);
|
||||||
|
|
||||||
|
mask = 15;
|
||||||
|
if (m_env_bits[ch])
|
||||||
|
mask &= ~1; /* 3 bit resolution, mask LSB */
|
||||||
|
|
||||||
|
m_channels[ch*3+0].envelope[ LEFT] =
|
||||||
|
m_channels[ch*3+1].envelope[ LEFT] =
|
||||||
|
m_channels[ch*3+2].envelope[ LEFT] = envelope[mode][step] & mask;
|
||||||
|
if (m_env_reverse_right[ch])
|
||||||
|
{
|
||||||
|
m_channels[ch*3+0].envelope[RIGHT] =
|
||||||
|
m_channels[ch*3+1].envelope[RIGHT] =
|
||||||
|
m_channels[ch*3+2].envelope[RIGHT] = (15 - envelope[mode][step]) & mask;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
m_channels[ch*3+0].envelope[RIGHT] =
|
||||||
|
m_channels[ch*3+1].envelope[RIGHT] =
|
||||||
|
m_channels[ch*3+2].envelope[RIGHT] = envelope[mode][step] & mask;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
/* envelope mode off, set all envelope factors to 16 */
|
||||||
|
m_channels[ch*3+0].envelope[ LEFT] =
|
||||||
|
m_channels[ch*3+1].envelope[ LEFT] =
|
||||||
|
m_channels[ch*3+2].envelope[ LEFT] =
|
||||||
|
m_channels[ch*3+0].envelope[RIGHT] =
|
||||||
|
m_channels[ch*3+1].envelope[RIGHT] =
|
||||||
|
m_channels[ch*3+2].envelope[RIGHT] = 16;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void saa1099_device::control_w(unsigned char data)
|
||||||
|
{
|
||||||
|
if ((data & 0xff) > 0x1c)
|
||||||
|
{
|
||||||
|
/* Error! */
|
||||||
|
}
|
||||||
|
|
||||||
|
m_selected_reg = data & 0x1f;
|
||||||
|
if (m_selected_reg == 0x18 || m_selected_reg == 0x19)
|
||||||
|
{
|
||||||
|
/* clock the envelope channels */
|
||||||
|
if (m_env_clock[0])
|
||||||
|
envelope_w(0);
|
||||||
|
if (m_env_clock[1])
|
||||||
|
envelope_w(1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void saa1099_device::data_w(unsigned char data)
|
||||||
|
{
|
||||||
|
int reg = m_selected_reg;
|
||||||
|
int ch;
|
||||||
|
|
||||||
|
switch (reg)
|
||||||
|
{
|
||||||
|
/* channel i amplitude */
|
||||||
|
case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05:
|
||||||
|
ch = reg & 7;
|
||||||
|
m_channels[ch].amplitude[LEFT] = amplitude_lookup[data & 0x0f];
|
||||||
|
m_channels[ch].amplitude[RIGHT] = amplitude_lookup[(data >> 4) & 0x0f];
|
||||||
|
break;
|
||||||
|
/* channel i frequency */
|
||||||
|
case 0x08: case 0x09: case 0x0a: case 0x0b: case 0x0c: case 0x0d:
|
||||||
|
ch = reg & 7;
|
||||||
|
m_channels[ch].frequency = data & 0xff;
|
||||||
|
break;
|
||||||
|
/* channel i octave */
|
||||||
|
case 0x10: case 0x11: case 0x12:
|
||||||
|
ch = (reg - 0x10) << 1;
|
||||||
|
m_channels[ch + 0].octave = data & 0x07;
|
||||||
|
m_channels[ch + 1].octave = (data >> 4) & 0x07;
|
||||||
|
break;
|
||||||
|
/* channel i frequency enable */
|
||||||
|
case 0x14:
|
||||||
|
for (ch = 0; ch < 6; ch++)
|
||||||
|
m_channels[ch].freq_enable = BIT(data, ch);
|
||||||
|
break;
|
||||||
|
/* channel i noise enable */
|
||||||
|
case 0x15:
|
||||||
|
for (ch = 0; ch < 6; ch++)
|
||||||
|
m_channels[ch].noise_enable = BIT(data, ch);
|
||||||
|
break;
|
||||||
|
/* noise generators parameters */
|
||||||
|
case 0x16:
|
||||||
|
m_noise_params[0] = data & 0x03;
|
||||||
|
m_noise_params[1] = (data >> 4) & 0x03;
|
||||||
|
break;
|
||||||
|
/* envelope generators parameters */
|
||||||
|
case 0x18: case 0x19:
|
||||||
|
ch = reg - 0x18;
|
||||||
|
m_env_reverse_right[ch] = BIT(data, 0);
|
||||||
|
m_env_mode[ch] = (data >> 1) & 0x07;
|
||||||
|
m_env_bits[ch] = BIT(data, 4);
|
||||||
|
m_env_clock[ch] = BIT(data, 5);
|
||||||
|
m_env_enable[ch] = BIT(data, 7);
|
||||||
|
/* reset the envelope */
|
||||||
|
m_env_step[ch] = 0;
|
||||||
|
break;
|
||||||
|
/* channels enable & reset generators */
|
||||||
|
case 0x1c:
|
||||||
|
m_all_ch_enable = BIT(data, 0);
|
||||||
|
m_sync_state = BIT(data, 1);
|
||||||
|
if (BIT(data, 1))
|
||||||
|
{
|
||||||
|
/* Synch & Reset generators */
|
||||||
|
for (int i = 0; i < 6; i++)
|
||||||
|
{
|
||||||
|
m_channels[i].level = 0;
|
||||||
|
m_channels[i].counter = m_channels[i].freq();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void saa1099_device::write(int offset, unsigned char data)
|
||||||
|
{
|
||||||
|
if (offset & 1)
|
||||||
|
control_w(data);
|
||||||
|
else
|
||||||
|
data_w(data);
|
||||||
|
}
|
||||||
77
src/engine/platform/sound/saa1099.h
Normal file
77
src/engine/platform/sound/saa1099.h
Normal file
|
|
@ -0,0 +1,77 @@
|
||||||
|
// license:BSD-3-Clause
|
||||||
|
// copyright-holders:Juergen Buchmueller, Manuel Abadia
|
||||||
|
/**********************************************
|
||||||
|
Philips SAA1099 Sound driver
|
||||||
|
**********************************************/
|
||||||
|
|
||||||
|
#ifndef MAME_SOUND_SAA1099_H
|
||||||
|
#define MAME_SOUND_SAA1099_H
|
||||||
|
|
||||||
|
//**************************************************************************
|
||||||
|
// TYPE DEFINITIONS
|
||||||
|
//**************************************************************************
|
||||||
|
|
||||||
|
// ======================> saa1099_device
|
||||||
|
|
||||||
|
class saa1099_device
|
||||||
|
{
|
||||||
|
public:
|
||||||
|
saa1099_device();
|
||||||
|
|
||||||
|
void control_w(unsigned char data);
|
||||||
|
void data_w(unsigned char data);
|
||||||
|
|
||||||
|
void write(int offset, unsigned char data);
|
||||||
|
|
||||||
|
// device-level overrides
|
||||||
|
void device_start();
|
||||||
|
void device_clock_changed();
|
||||||
|
|
||||||
|
// sound stream update overrides
|
||||||
|
void sound_stream_update(short** outputs, int len);
|
||||||
|
|
||||||
|
private:
|
||||||
|
struct saa1099_channel
|
||||||
|
{
|
||||||
|
saa1099_channel() : amplitude{ 0, 0 }, envelope{ 0, 0 } { }
|
||||||
|
|
||||||
|
unsigned char frequency = 0; // frequency (0x00..0xff)
|
||||||
|
bool freq_enable = false; // frequency enable
|
||||||
|
bool noise_enable = false; // noise enable
|
||||||
|
unsigned char octave = 0; // octave (0x00..0x07)
|
||||||
|
unsigned short amplitude[2]; // amplitude
|
||||||
|
unsigned char envelope[2]; // envelope (0x00..0x0f or 0x10 == off)
|
||||||
|
|
||||||
|
/* vars to simulate the square wave */
|
||||||
|
inline unsigned int freq() const { return (511 - frequency) << (8 - octave); } // clock / ((511 - frequency) * 2^(8 - octave))
|
||||||
|
int counter = 0;
|
||||||
|
unsigned char level = 0;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct saa1099_noise
|
||||||
|
{
|
||||||
|
saa1099_noise() { }
|
||||||
|
|
||||||
|
/* vars to simulate the noise generator output */
|
||||||
|
int counter = 0;
|
||||||
|
int freq = 0;
|
||||||
|
unsigned int level = 0xffffffffU; // noise polynomial shifter
|
||||||
|
};
|
||||||
|
|
||||||
|
void envelope_w(int ch);
|
||||||
|
|
||||||
|
unsigned char m_noise_params[2]; // noise generators parameters
|
||||||
|
bool m_env_enable[2]; // envelope generators enable
|
||||||
|
bool m_env_reverse_right[2]; // envelope reversed for right channel
|
||||||
|
unsigned char m_env_mode[2]; // envelope generators mode
|
||||||
|
bool m_env_bits[2]; // true = 3 bits resolution
|
||||||
|
bool m_env_clock[2]; // envelope clock mode (true external)
|
||||||
|
unsigned char m_env_step[2]; // current envelope step
|
||||||
|
bool m_all_ch_enable; // all channels enable
|
||||||
|
bool m_sync_state; // sync all channels
|
||||||
|
unsigned char m_selected_reg; // selected register
|
||||||
|
saa1099_channel m_channels[6]; // channels
|
||||||
|
saa1099_noise m_noise[2]; // noise generators
|
||||||
|
};
|
||||||
|
|
||||||
|
#endif // MAME_SOUND_SAA1099_H
|
||||||
Loading…
Reference in a new issue