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finally do EFxx right

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took a while to figure out...
This commit is contained in:
tildearrow 2021-12-28 00:51:38 -05:00
parent b246000f0e
commit d766c4aaf0
13 changed files with 23 additions and 37 deletions
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26
src/engine/playback.cpp
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@ -522,31 +522,7 @@ void DivEngine::processRow(int i, bool afterDelay) {
extValuePresent=true;
break;
case 0xef: // global pitch
for (int i=0; i<chans; i++) {
chan[i].pitch-=globalPitch;
}
// what is this mess?
// are you for real? how does this effect even work?!
if (effectVal>0x80) {
for (int i=0; i<effectVal-0x80; i++) {
if (globalPitch<=0) {
globalPitch+=(120-(8*globalPitch)/55);
} else {
globalPitch+=(120-globalPitch/32);
}
}
} else if (effectVal<0x80) {
for (int i=0; i<0x80-effectVal; i++) {
if (globalPitch<=0) {
globalPitch-=(120-(8*globalPitch)/55);
} else {
globalPitch-=(120-globalPitch/32);
}
}
}
for (int i=0; i<chans; i++) {
chan[i].pitch+=globalPitch;
}
globalPitch+=(signed char)(effectVal-0x80);
break;
}
}