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PCE: kind of implement LFO

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This commit is contained in:
tildearrow 2021-06-09 01:08:42 -05:00
parent 480ddf489a
commit 99e59278ad
5 changed files with 37 additions and 4 deletions
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16
src/engine/platform/dummy.cpp
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@ -18,13 +18,19 @@ void DivPlatformDummy::tick() {
for (unsigned char i=0; i<chans; i++) {
chan[i].amp--;
if (chan[i].amp<0) chan[i].amp=0;
if (chan[i].freqChanged) {
chan[i].freqChanged=false;
chan[i].freq=(chan[i].baseFreq*(ONE_SEMITONE+chan[i].pitch))/ONE_SEMITONE;
}
}
}
int DivPlatformDummy::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON:
chan[c.chan].freq=16.4f*pow(2.0f,((float)c.value/12.0f));
chan[c.chan].baseFreq=16.4f*pow(2.0f,((float)c.value/12.0f));
chan[c.chan].freqChanged=true;
chan[c.chan].active=true;
chan[c.chan].amp=64;
break;
@ -38,6 +44,14 @@ int DivPlatformDummy::dispatch(DivCommand c) {
case DIV_CMD_GET_VOLUME:
return chan[c.chan].vol;
break;
case DIV_CMD_PITCH:
chan[c.chan].pitch=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_LEGATO:
chan[c.chan].baseFreq=16.4f*pow(2.0f,((float)c.value/12.0f));
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_GET_VOLMAX:
return 15;
break;