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Add reverse playback support

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This commit is contained in:
cam900 2023-04-03 00:34:09 +09:00
parent 9b877764c4
commit 048728b496
6 changed files with 37 additions and 8 deletions
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21
src/engine/platform/k053260.cpp
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@ -133,7 +133,7 @@ void DivPlatformK053260::tick(bool sysTick) {
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
unsigned char keyon=regPool[0x28]|(1<<i);
unsigned char keyoff=keyon&~(1<<i);
unsigned char keyoff=keyon&~(17<<i);
unsigned char loopon=regPool[0x2a]|(1<<i);
unsigned char loopoff=loopon&~(1<<i);
double off=1.0;
@ -155,10 +155,19 @@ void DivPlatformK053260::tick(bool sysTick) {
unsigned int length=0;
if (chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
start=sampleOffK053260[chan[i].sample];
length=start+s->length8;
length=s->length8;
if (chan[i].reverse) {
start+=length;
keyon|=(16<<i);
}
}
if (chan[i].audPos>0) {
start=start+MIN(chan[i].audPos,s->length8);
if (chan[i].reverse) {
start=start-MIN(chan[i].audPos,s->length8);
}
else {
start=start+MIN(chan[i].audPos,s->length8);
}
length=MAX(1,length-chan[i].audPos);
}
start=MIN(start,getSampleMemCapacity());
@ -314,6 +323,12 @@ int DivPlatformK053260::dispatch(DivCommand c) {
chan[c.chan].audPos=c.value;
chan[c.chan].setPos=true;
break;
case DIV_CMD_SAMPLE_DIR: {
if (chan[c.chan].reverse!=(bool)(c.value&1)) {
chan[c.chan].reverse=c.value&1;
}
break;
}
case DIV_CMD_GET_VOLMAX:
return 127;
break;