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add song tuning

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soon: system clock settings
This commit is contained in:
tildearrow 2022-01-28 00:55:51 -05:00
parent 0071894471
commit ec66b7a21b
26 changed files with 211 additions and 156 deletions
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17
src/engine/platform/gb.cpp
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@ -5,7 +5,7 @@
#define rWrite(a,v) if (!skipRegisterWrites) {GB_apu_write(gb,a,v); if (dumpWrites) {addWrite(a,v);} }
#define immWrite(a,v) {GB_apu_write(gb,a,v); if (dumpWrites) {addWrite(a,v);} }
#define FREQ_BASE 8015.85f
#define CHIP_DIVIDER 16
void DivPlatformGB::acquire(short* bufL, short* bufR, size_t start, size_t len) {
for (size_t i=start; i<start+len; i++) {
@ -91,16 +91,16 @@ void DivPlatformGB::tick() {
} else {
if (!chan[i].inPorta) {
if (chan[i].std.arpMode) {
chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].std.arp+24)/12.0f)));
chan[i].baseFreq=NOTE_PERIODIC(chan[i].std.arp+24);
} else {
chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].note+chan[i].std.arp)/12.0f)));
chan[i].baseFreq=NOTE_PERIODIC(chan[i].note+chan[i].std.arp);
}
}
}
chan[i].freqChanged=true;
} else {
if (chan[i].std.arpMode && chan[i].std.finishedArp) {
chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].note)/12.0f)));
chan[i].baseFreq=NOTE_PERIODIC(chan[i].note);
chan[i].freqChanged=true;
}
}
@ -181,7 +181,7 @@ int DivPlatformGB::dispatch(DivCommand c) {
if (c.chan==3) { // noise
chan[c.chan].baseFreq=c.value;
} else {
chan[c.chan].baseFreq=round(FREQ_BASE/pow(2.0f,((float)c.value/12.0f)));
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
}
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
@ -223,7 +223,7 @@ int DivPlatformGB::dispatch(DivCommand c) {
chan[c.chan].keyOn=true;
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=round(FREQ_BASE/pow(2.0f,((float)c.value2/12.0f)));
int destFreq=NOTE_PERIODIC(c.value2);
bool return2=false;
if (destFreq>chan[c.chan].baseFreq) {
chan[c.chan].baseFreq+=c.value;
@ -261,7 +261,7 @@ int DivPlatformGB::dispatch(DivCommand c) {
}
case DIV_CMD_LEGATO:
if (c.chan==3) break;
chan[c.chan].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(c.value+((chan[c.chan].std.willArp && !chan[c.chan].std.arpMode)?(chan[c.chan].std.arp):(0)))/12.0f)));
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value+((chan[c.chan].std.willArp && !chan[c.chan].std.arpMode)?(chan[c.chan].std.arp):(0)));
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
break;
@ -356,7 +356,8 @@ int DivPlatformGB::init(DivEngine* p, int channels, int sugRate, bool pal) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
rate=262144;
chipClock=4194304;
rate=chipClock/16;
gb=new GB_gameboy_t;
reset();
return 4;