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several pitch fixes and stuff 

pull request #303
This commit is contained in:
tildearrow 2022-03-23 23:19:16 -05:00
parent 3ed38aca5e
commit ece34990e5
5 changed files with 36 additions and 16 deletions
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3
src/engine/dispatch.h
View File

@ -384,7 +384,8 @@ class DivDispatch {
virtual ~DivDispatch();
};
#define NOTE_PERIODIC(x) parent->calcBaseFreq(chipClock,CHIP_DIVIDER,x,true)
#define NOTE_PERIODIC(x) round(parent->calcBaseFreq(chipClock,CHIP_DIVIDER,x,true))
#define NOTE_PERIODIC_NOROUND(x) parent->calcBaseFreq(chipClock,CHIP_DIVIDER,x,true)
#define NOTE_FREQUENCY(x) parent->calcBaseFreq(chipClock,CHIP_FREQBASE,x,false)
#define COLOR_NTSC (315000000.0/88.0)

8
src/engine/engine.cpp
View File

@ -815,11 +815,19 @@ void DivEngine::playSub(bool preserveDrift, int goalRow) {
cmdStream.clear();
}
/*
int DivEngine::calcBaseFreq(double clock, double divider, int note, bool period) {
double base=(period?(song.tuning*0.0625):song.tuning)*pow(2.0,(float)(note+3)/12.0);
return period?
round((clock/base)/divider):
base*(divider/clock);
}*/
double DivEngine::calcBaseFreq(double clock, double divider, int note, bool period) {
double base=(period?(song.tuning*0.0625):song.tuning)*pow(2.0,(float)(note+3)/12.0);
return period?
(clock/base)/divider:
base*(divider/clock);
}
int DivEngine::calcFreq(int base, int pitch, bool period, int octave) {

2
src/engine/engine.h
View File

@ -326,7 +326,7 @@ class DivEngine {
void setConf(String key, String value);
// calculate base frequency/period
int calcBaseFreq(double clock, double divider, int note, bool period);
double calcBaseFreq(double clock, double divider, int note, bool period);
// calculate frequency/period
int calcFreq(int base, int pitch, bool period=false, int octave=0);

23
src/engine/platform/amiga.cpp
View File

@ -131,15 +131,15 @@ void DivPlatformAmiga::tick() {
if (chan[i].std.hadArp) {
if (!chan[i].inPorta) {
if (chan[i].std.arpMode) {
chan[i].baseFreq=off*NOTE_PERIODIC(chan[i].std.arp);
chan[i].baseFreq=round(off*NOTE_PERIODIC_NOROUND(chan[i].std.arp));
} else {
chan[i].baseFreq=off*NOTE_PERIODIC(chan[i].note+chan[i].std.arp);
chan[i].baseFreq=round(off*NOTE_PERIODIC_NOROUND(chan[i].note+chan[i].std.arp));
}
}
chan[i].freqChanged=true;
} else {
if (chan[i].std.arpMode && chan[i].std.finishedArp) {
chan[i].baseFreq=off*NOTE_PERIODIC(chan[i].note);
chan[i].baseFreq=round(off*NOTE_PERIODIC_NOROUND(chan[i].note));
chan[i].freqChanged=true;
}
}
@ -183,7 +183,7 @@ int DivPlatformAmiga::dispatch(DivCommand c) {
}
}
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=off*NOTE_PERIODIC(c.value);
chan[c.chan].baseFreq=round(off*NOTE_PERIODIC_NOROUND(c.value));
}
if (chan[c.chan].sample<0 || chan[c.chan].sample>=parent->song.sampleLen) {
chan[c.chan].sample=-1;
@ -241,7 +241,18 @@ int DivPlatformAmiga::dispatch(DivCommand c) {
chan[c.chan].keyOn=true;
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=NOTE_PERIODIC(c.value2);
DivInstrument* ins=parent->getIns(chan[c.chan].ins);
chan[c.chan].sample=ins->amiga.initSample;
double off=1.0;
if (chan[c.chan].sample>=0 && chan[c.chan].sample<parent->song.sampleLen) {
DivSample* s=parent->getSample(chan[c.chan].sample);
if (s->centerRate<1) {
off=1.0;
} else {
off=8363.0/(double)s->centerRate;
}
}
int destFreq=round(off*NOTE_PERIODIC_NOROUND(c.value2));
bool return2=false;
if (destFreq>chan[c.chan].baseFreq) {
chan[c.chan].baseFreq+=c.value;
@ -273,7 +284,7 @@ int DivPlatformAmiga::dispatch(DivCommand c) {
off=8363.0/(double)s->centerRate;
}
}
chan[c.chan].baseFreq=off*NOTE_PERIODIC(c.value+((chan[c.chan].std.willArp && !chan[c.chan].std.arpMode)?(chan[c.chan].std.arp-12):(0)));
chan[c.chan].baseFreq=round(off*NOTE_PERIODIC_NOROUND(c.value+((chan[c.chan].std.willArp && !chan[c.chan].std.arpMode)?(chan[c.chan].std.arp-12):(0))));
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
break;

16
src/engine/platform/segapcm.cpp
View File

@ -87,15 +87,15 @@ void DivPlatformSegaPCM::tick() {
if (chan[i].std.hadArp) {
if (!chan[i].inPorta) {
if (chan[i].std.arpMode) {
chan[i].baseFreq=(chan[i].std.arp<<6)+baseFreqOff;
chan[i].baseFreq=(chan[i].std.arp<<6);
} else {
chan[i].baseFreq=((chan[i].note+(signed char)chan[i].std.arp)<<6)+baseFreqOff;
chan[i].baseFreq=((chan[i].note+(signed char)chan[i].std.arp)<<6);
}
}
chan[i].freqChanged=true;
} else {
if (chan[i].std.arpMode && chan[i].std.finishedArp) {
chan[i].baseFreq=(chan[i].note<<6)+baseFreqOff;
chan[i].baseFreq=(chan[i].note<<6);
chan[i].freqChanged=true;
}
}
@ -113,7 +113,7 @@ void DivPlatformSegaPCM::tick() {
DivSample* s=parent->getSample(chan[i].pcm.sample);
off=(double)s->centerRate/8363.0;
}
chan[i].pcm.freq=MIN(255,((off*parent->song.tuning*pow(2.0,double(chan[i].freq+256)/(64.0*12.0)))*255)/31250);
chan[i].pcm.freq=MIN(255,(15625+(off*parent->song.tuning*pow(2.0,double(chan[i].freq+256)/(64.0*12.0)))*255)/31250);
if (dumpWrites && i>=8) {
addWrite(0x10007+((i-8)<<3),chan[i].pcm.freq);
}
@ -250,17 +250,17 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
break;
}
case DIV_CMD_NOTE_PORTA: {
int destFreq=(c.value2<<6)+baseFreqOff;
int destFreq=(c.value2<<6);
int newFreq;
bool return2=false;
if (destFreq>chan[c.chan].baseFreq) {
newFreq=chan[c.chan].baseFreq+c.value;
newFreq=chan[c.chan].baseFreq+c.value*4;
if (newFreq>=destFreq) {
newFreq=destFreq;
return2=true;
}
} else {
newFreq=chan[c.chan].baseFreq-c.value;
newFreq=chan[c.chan].baseFreq-c.value*4;
if (newFreq<=destFreq) {
newFreq=destFreq;
return2=true;
@ -275,7 +275,7 @@ int DivPlatformSegaPCM::dispatch(DivCommand c) {
break;
}
case DIV_CMD_LEGATO: {
chan[c.chan].baseFreq=(c.value<<6)+baseFreqOff;
chan[c.chan].baseFreq=(c.value<<6);
chan[c.chan].freqChanged=true;
break;
}