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VGM export: Arcade sample looping

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This commit is contained in:
tildearrow 2022-01-24 17:13:47 -05:00
parent d945e5299a
commit 9d2032d627
6 changed files with 50 additions and 20 deletions
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29
src/engine/engine.cpp
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@ -2287,25 +2287,40 @@ SafeWriter* DivEngine::saveVGM() {
if (memPos>=16777216) break;
sample->rendOffP=memPos;
unsigned int alignedSize=(sample->rendLength+0xff)&(~0xff);
unsigned int readPos=0;
if (alignedSize>65536) alignedSize=65536;
if (sample->depth==8) {
for (unsigned int j=0; j<alignedSize; j++) {
if (j>=sample->rendLength) {
pcmMem[memPos++]=0x80;
if (readPos>=sample->rendLength) {
if (sample->loopStart>=0 && sample->loopStart<(int)sample->rendLength) {
readPos=sample->loopStart;
pcmMem[memPos++]=((unsigned char)sample->rendData[readPos]+0x80);
} else {
pcmMem[memPos++]=0x80;
}
} else {
pcmMem[memPos++]=((unsigned char)sample->rendData[j]+0x80);
pcmMem[memPos++]=((unsigned char)sample->rendData[readPos]+0x80);
}
readPos++;
if (memPos>=16777216) break;
}
sample->loopOffP=readPos-sample->loopStart;
} else {
for (unsigned int j=0; j<alignedSize; j++) {
if (j>=sample->rendLength) {
pcmMem[memPos++]=0x80;
if (readPos>=sample->rendLength) {
if (sample->loopStart>=0 && sample->loopStart<(int)sample->rendLength) {
readPos=sample->loopStart;
pcmMem[memPos++]=(((unsigned short)sample->rendData[readPos]+0x8000)>>8);
} else {
pcmMem[memPos++]=0x80;
}
} else {
pcmMem[memPos++]=(((unsigned short)sample->rendData[j]+0x8000)>>8);
pcmMem[memPos++]=(((unsigned short)sample->rendData[readPos]+0x8000)>>8);
}
readPos++;
if (memPos>=16777216) break;
}
sample->loopOffP=readPos-sample->loopStart;
}
if (memPos>=16777216) break;
}
@ -3896,6 +3911,7 @@ bool DivEngine::moveSampleDown(int which) {
}
void DivEngine::noteOn(int chan, int ins, int note, int vol) {
if (chan<0 || chan>=chans) return;
isBusy.lock();
pendingNotes.push(DivNoteEvent(chan,ins,note,vol,true));
if (!playing) {
@ -3907,6 +3923,7 @@ void DivEngine::noteOn(int chan, int ins, int note, int vol) {
}
void DivEngine::noteOff(int chan) {
if (chan<0 || chan>=chans) return;
isBusy.lock();
pendingNotes.push(DivNoteEvent(chan,-1,-1,-1,false));
if (!playing) {