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start working on LFO macro mode

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This commit is contained in:
tildearrow 2022-10-07 14:17:25 -05:00
parent a979bc244d
commit a965433bba
3 changed files with 32 additions and 13 deletions
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28
src/engine/macroInt.cpp
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@ -31,11 +31,18 @@
#define ADSR_SR source.val[7]
#define ADSR_RR source.val[8]
#define LFO_SPEED source.val[11]
#define LFO_WAVE source.val[12]
#define LFO_PHASE source.val[13]
#define LFO_LOOP source.val[14]
#define LFO_GLOBAL source.val[15]
void DivMacroStruct::prepare(DivInstrumentMacro& source, DivEngine* e) {
has=had=actualHad=will=true;
mode=source.mode;
type=(source.open>>1)&3;
linger=(source.name=="vol" && e->song.volMacroLinger);
lfoPos=LFO_PHASE;
}
void DivMacroStruct::doMacro(DivInstrumentMacro& source, bool released, bool tick) {
@ -86,7 +93,7 @@ void DivMacroStruct::doMacro(DivInstrumentMacro& source, bool released, bool tic
}
}
}
if (type==1 || type==3) { // ADSR
if (type==1) { // ADSR
if (released && lastPos<3) lastPos=3;
switch (lastPos) {
case 0: // attack
@ -126,8 +133,23 @@ void DivMacroStruct::doMacro(DivInstrumentMacro& source, bool released, bool tic
}
val=ADSR_LOW+((pos+(ADSR_HIGH-ADSR_LOW)*pos)>>8);
}
if (type==2 || type==3) { // LFO
if (type==2) { // LFO
lfoPos+=LFO_SPEED;
lfoPos&=1023;
int lfoOut=0;
switch (LFO_WAVE&3) {
case 0: // triangle
lfoOut=((lfoPos&512)?(1023-lfoPos):(lfoPos))>>1;
break;
case 1: // saw
lfoOut=lfoPos>>2;
break;
case 2: // pulse
lfoOut=(lfoPos&512)?255:0;
break;
}
val=ADSR_LOW+((lfoOut+(ADSR_HIGH-ADSR_LOW)*lfoOut)>>8);
}
}
}