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IT import: improvements

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This commit is contained in:
tildearrow 2024-06-24 16:35:02 -05:00
parent e168d2b6c2
commit fbe95a1c08
1 changed files with 78 additions and 10 deletions
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88
src/engine/fileOps/it.cpp
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@ -32,13 +32,20 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
unsigned int insPtr[256];
unsigned int samplePtr[256];
unsigned int patPtr[256];
unsigned short patLen[256];
SafeReader reader=SafeReader(file,len);
warnings="";
memset(chanPan,0,64);
memset(chanVol,0,64);
memset(orders,0,256);
memset(patLen,0,256*sizeof(unsigned short));
try {
DivSong ds;
ds.version=DIV_VERSION_XM;
ds.version=DIV_VERSION_IT;
ds.noSlidesOnFirstTick=true;
ds.rowResetsArpPos=true;
ds.ignoreJumpAtEnd=false;
@ -88,8 +95,10 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
unsigned char panSep=reader.readC();
reader.readC(); // PWD - unused
logV("orders len: %d",ordersLen);
logV("pattern count: %d",patCount);
ds.subsong[0]->hz=(double)initTempo/2.5;
ds.subsong[0]->speeds.val[0]=initSpeed;
ds.subsong[0]->speeds.len=1;
logV("used tracker: %x",usedTracker);
logV("compatible with: %x",compatTracker);
logV("flags: %x",flags);
@ -97,8 +106,6 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
logV("global vol: %d",globalVol);
logV("master vol: %d",masterVol);
logV("speed: %d",initSpeed);
logV("tempo: %d",initTempo);
logV("pan sep: %d",panSep);
unsigned short commentLen=reader.readS();
@ -112,14 +119,42 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
reader.read(chanPan,64);
reader.read(chanVol,64);
reader.read(orders,ordersLen);
logD("reading orders...");
size_t curSubSong=0;
ds.subsong[curSubSong]->ordersLen=0;
bool subSongIncreased=false;
for (int i=0; i<ordersLen; i++) {
for (int j=0; j<DIV_MAX_CHANS; j++) {
ds.subsong[0]->orders.ord[j][i]=orders[i];
unsigned char nextOrder=reader.readC();
orders[i]=curOrder;
// skip +++ order
if (nextOrder==254) {
logV("- +++");
continue;
}
// next subsong
if (nextOrder==255) {
logV("- end of song");
if (!subSongIncreased) {
curSubSong++;
subSongIncreased=true;
}
curOrder=0;
continue;
}
subSongIncreased=false;
if (ds.subsong.size()<=curSubSong) {
ds.subsong.push_back(new DivSubSong);
ds.subsong[curSubSong]->ordersLen=0;
ds.subsong[curSubSong]->name=fmt::sprintf("Order %.2X",i);
}
logV("- %.2x",nextOrder);
for (int j=0; j<DIV_MAX_CHANS; j++) {
ds.subsong[curSubSong]->orders.ord[j][ds.subsong[curSubSong]->ordersLen]=nextOrder;
}
ds.subsong[curSubSong]->ordersLen++;
curOrder++;
}
ds.subsong[0]->ordersLen=ordersLen;
for (int i=0; i<ds.insLen; i++) {
insPtr[i]=reader.readI();
@ -440,6 +475,8 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
unsigned int dataLen=(unsigned short)reader.readS();
unsigned short patRows=reader.readS();
patLen[i]=patRows;
if (patRows>DIV_MAX_ROWS) {
logE("too many rows! %d",patRows);
lastError="too many rows";
@ -533,6 +570,37 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
}
}
// set channel visibility
for (int i=maxChan+1; i<((maxChan+32)&(~31)); i++) {
ds.subsong[0]->chanShow[i]=false;
ds.subsong[0]->chanShowChanOsc[i]=false;
}
// copy patterns to the rest of subsongs
for (size_t i=1; i<ds.subsong.size(); i++) {
for (int j=0; j<DIV_MAX_CHANS; j++) {
for (int k=0; k<patCount; k++) {
if (ds.subsong[0]->pat[j].data[k]) ds.subsong[0]->pat[j].data[k]->copyOn(ds.subsong[i]->pat[j].getPattern(k,true));
}
ds.subsong[i]->pat[j].effectCols=ds.subsong[0]->pat[j].effectCols;
}
ds.subsong[i]->speeds=ds.subsong[0]->speeds;
ds.subsong[i]->hz=ds.subsong[0]->hz;
memcpy(ds.subsong[i]->chanShow,ds.subsong[0]->chanShow,DIV_MAX_CHANS*sizeof(bool));
memcpy(ds.subsong[i]->chanShowChanOsc,ds.subsong[0]->chanShowChanOsc,DIV_MAX_CHANS*sizeof(bool));
}
// set pattern lengths and place end of pattern markers
for (size_t i=0; i<ds.subsong.size(); i++) {
int patLenMax=0;
for (int j=0; j<ds.subsong[i]->ordersLen; j++) {
int nextLen=patLen[ds.subsong[i]->orders.ord[0][j]];
if (patLenMax<nextLen) patLenMax=nextLen;
}
ds.subsong[i]->patLen=patLenMax;
}
// set systems
for (int i=0; i<(maxChan+32)>>5; i++) {
ds.system[i]=DIV_SYSTEM_ES5506;
ds.systemFlags[i].set("amigaVol",true);