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VGM export: add option to insert pattern change hi

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nts
This commit is contained in:
tildearrow 2022-08-03 18:44:45 -05:00
parent eafbf24290
commit 7ec4f7cb9e
4 changed files with 49 additions and 4 deletions
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28
src/engine/vgmOps.cpp
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@ -802,7 +802,7 @@ void DivEngine::performVGMWrite(SafeWriter* w, DivSystem sys, DivRegWrite& write
}
}
SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version) {
SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version, bool patternHints) {
if (version<0x150) {
lastError="VGM version is too low";
return NULL;
@ -1795,6 +1795,12 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version) {
playSub(false);
size_t tickCount=0;
bool writeLoop=false;
int ord=-1;
int exportChans=0;
for (int i=0; i<chans; i++) {
if (!willExport[dispatchOfChan[i]]) continue;
exportChans++;
}
while (!done) {
if (loopPos==-1) {
if (loopOrder==curOrder && loopRow==curRow && ticks==1) {
@ -1820,6 +1826,26 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version) {
writeLoop=false;
loopPos=-1;
}
} else {
// check for pattern change
if (prevOrder!=ord) {
logI("registering order change %d on %d",prevOrder, prevRow);
ord=prevOrder;
if (patternHints) {
w->writeC(0x67);
w->writeC(0x66);
w->writeC(0xfe);
w->writeI(3+exportChans);
w->writeC(0x01);
w->writeC(prevOrder);
w->writeC(prevRow);
for (int i=0; i<chans; i++) {
if (!willExport[dispatchOfChan[i]]) continue;
w->writeC(curSubSong->orders.ord[i][prevOrder]);
}
}
}
}
// get register dumps
for (int i=0; i<song.systemLen; i++) {