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add option to remove unused patterns

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tildearrow 2025-10-04 18:28:34 -05:00
parent 5aa9019ec2
commit 80a92b8b43
3 changed files with 27 additions and 0 deletions
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18
src/engine/song.cpp
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@ -278,6 +278,24 @@ void DivSubSong::clearData() {
ordersLen=1;
}
void DivSubSong::removeUnusedPatterns() {
for (int i=0; i<DIV_MAX_CHANS; i++) {
bool used[DIV_MAX_PATTERNS];
memset(used,0,DIV_MAX_PATTERNS*sizeof(bool));
for (int j=0; j<ordersLen; j++) {
used[orders.ord[i][j]]=true;
}
for (int j=0; j<DIV_MAX_PATTERNS; j++) {
if (!used[j] && pat[i].data[j]!=NULL) {
delete pat[i].data[j];
pat[i].data[j]=NULL;
}
}
}
}
void DivSubSong::optimizePatterns() {
for (int i=0; i<DIV_MAX_CHANS; i++) {
logD("optimizing channel %d...",i);