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Legato and mapVelocity, TODO: correct?

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This commit is contained in:
cam900 2024-07-15 19:33:32 +09:00
parent c58a232cd5
commit 49c214f72e
1 changed files with 14 additions and 2 deletions
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16
src/engine/platform/opl.cpp
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@ -2076,7 +2076,7 @@ int DivPlatformOPL::dispatch(DivCommand c) {
commitState(c.chan,ins);
chan[c.chan].insChanged=false;
}
chan[c.chan].baseFreq=(PCM_CHECK(c.chan))?NOTE_PCM(c.value):
chan[c.chan].baseFreq=(PCM_CHECK(c.chan))?NOTE_PCM(c.value+chan[c.chan].sampleNoteDelta+((HACKY_LEGATO_MESS)?(chan[c.chan].std.arp.val-12):(0))):
(c.chan==adpcmChan)?(NOTE_ADPCMB(c.value)):(NOTE_FREQUENCY(c.value));
chan[c.chan].note=c.value;
chan[c.chan].freqChanged=true;
@ -2667,7 +2667,19 @@ DivDispatchOscBuffer* DivPlatformOPL::getOscBuffer(int ch) {
}
int DivPlatformOPL::mapVelocity(int ch, float vel) {
if (PCM_CHECK(ch)) return vel*127.0; // TODO: Covert to log, -0.375dB per step
if (PCM_CHECK(ch)) { // TODO: correct?
// -0.375dB per step
// -6: 64: 16
// -12: 32: 32
// -18: 16: 48
// -24: 8: 64
// -30: 4: 80
// -36: 2: 96
// -42: 1: 112
if (vel==0) return 0;
if (vel>=1.0) return 127;
return CLAMP(round(128.0-(112.0-log2(vel*127.0)*16.0)),0,127);
}
if (ch==adpcmChan) return vel*255.0;
// -0.75dB per step
// -6: 64: 8