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SMS: alleviate Nuked-PSG clicking, part 1

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tildearrow 2022-11-07 17:35:00 -05:00
parent 184a6bd6b2
commit 133627b325
2 changed files with 16 additions and 5 deletions
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18
src/engine/platform/sms.cpp
View file

@ -129,7 +129,7 @@ void DivPlatformSMS::tick(bool sysTick) {
if (chan[i].outVol<0) chan[i].outVol=0;
// old formula
// ((chan[i].vol&15)*MIN(15,chan[i].std.vol.val))>>4;
rWrite(0,0x90|(i<<5)|(isMuted[i]?15:(15-(chan[i].outVol&15))));
chan[i].writeVol=true;
}
if (chan[i].std.arp.had) {
if (!chan[i].inPorta) {
@ -235,6 +235,12 @@ void DivPlatformSMS::tick(bool sysTick) {
chan[3].freqChanged=false;
updateSNMode=false;
}
for (int i=0; i<4; i++) {
if (chan[i].writeVol) {
rWrite(0,0x90|(i<<5)|(isMuted[i]?15:(15-(chan[i].outVol&15))));
chan[i].writeVol=false;
}
}
}
int DivPlatformSMS::dispatch(DivCommand c) {
@ -250,7 +256,9 @@ int DivPlatformSMS::dispatch(DivCommand c) {
}
chan[c.chan].active=true;
//if (!parent->song.brokenOutVol2) {
rWrite(0,0x90|c.chan<<5|(isMuted[c.chan]?15:(15-(chan[c.chan].vol&15))));
chan[c.chan].writeVol=true;
chan[c.chan].outVol=chan[c.chan].vol;
//rWrite(0,0x90|c.chan<<5|(isMuted[c.chan]?15:(15-(chan[c.chan].vol&15))));
//}
chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_STD));
if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
@ -276,7 +284,9 @@ int DivPlatformSMS::dispatch(DivCommand c) {
if (!chan[c.chan].std.vol.has) {
chan[c.chan].outVol=c.value;
}
if (chan[c.chan].active) rWrite(0,0x90|c.chan<<5|(isMuted[c.chan]?15:(15-(chan[c.chan].vol&15))));
if (chan[c.chan].active) {
chan[c.chan].writeVol=true;
}
}
break;
case DIV_CMD_GET_VOLUME:
@ -356,7 +366,7 @@ int DivPlatformSMS::dispatch(DivCommand c) {
void DivPlatformSMS::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
if (chan[ch].active) rWrite(0,0x90|ch<<5|(isMuted[ch]?15:(15-(chan[ch].outVol&15))));
if (chan[ch].active) chan[ch].writeVol=true;
}
void DivPlatformSMS::forceIns() {

3
src/engine/platform/sms.h
View file

@ -31,7 +31,7 @@ extern "C" {
class DivPlatformSMS: public DivDispatch {
struct Channel {
int freq, baseFreq, pitch, pitch2, note, actualNote, ins;
bool active, insChanged, freqChanged, keyOn, keyOff, inPorta;
bool active, insChanged, freqChanged, keyOn, keyOff, inPorta, writeVol;
signed char vol, outVol;
DivMacroInt std;
void macroInit(DivInstrument* which) {
@ -52,6 +52,7 @@ class DivPlatformSMS: public DivDispatch {
keyOn(false),
keyOff(false),
inPorta(false),
writeVol(false),
vol(15),
outVol(15) {}
};