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IT import: pattern data
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1 changed files with 214 additions and 0 deletions
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@ -23,6 +23,16 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
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struct InvalidHeaderException {};
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bool success=false;
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char magic[4];
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unsigned char chanPan[64];
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unsigned char chanVol[64];
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unsigned char orders[256];
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unsigned int insPtr[256];
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unsigned int samplePtr[256];
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unsigned int patPtr[256];
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SafeReader reader=SafeReader(file,len);
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warnings="";
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@ -36,6 +46,16 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
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ds.ignoreJumpAtEnd=false;
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ds.pitchSlideSpeed=12;
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ds.system[0]=DIV_SYSTEM_DUMMY;
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ds.system[1]=DIV_SYSTEM_DUMMY;
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ds.system[2]=DIV_SYSTEM_DUMMY;
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ds.system[3]=DIV_SYSTEM_DUMMY;
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ds.system[4]=DIV_SYSTEM_DUMMY;
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ds.system[5]=DIV_SYSTEM_DUMMY;
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ds.system[6]=DIV_SYSTEM_DUMMY;
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ds.system[7]=DIV_SYSTEM_DUMMY;
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ds.systemLen=8;
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logV("Impulse Tracker module");
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// load here
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@ -54,6 +74,200 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
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ds.name=reader.readString(26);
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unsigned char hilight1=reader.readC();
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unsigned char hilight2=reader.readC();
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logV("highlights: %d %d",hilight1,hilight2);
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unsigned short ordersLen=reader.readS();
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ds.insLen=reader.readS();
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ds.sampleLen=reader.readS();
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unsigned short patCount=reader.readS();
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unsigned short usedTracker=reader.readS();
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unsigned short compatTracker=reader.readS();
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unsigned short flags=reader.readS();
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unsigned short special=reader.readS();
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unsigned char globalVol=reader.readC();
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unsigned char masterVol=reader.readC();
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unsigned char initSpeed=reader.readC();
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unsigned char initTempo=reader.readC();
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unsigned char panSep=reader.readC();
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reader.readC(); // PWD - unused
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logV("orders len: %d",ordersLen);
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logV("pattern count: %d",patCount);
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logV("used tracker: %x",usedTracker);
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logV("compatible with: %x",compatTracker);
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logV("flags: %x",flags);
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logV("special: %x",special);
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logV("global vol: %d",globalVol);
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logV("master vol: %d",masterVol);
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logV("speed: %d",initSpeed);
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logV("tempo: %d",initTempo);
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logV("pan sep: %d",panSep);
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unsigned short commentLen=reader.readS();
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unsigned int commentPtr=reader.readI();
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logV("comment len: %d",commentLen);
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logV("comment ptr: %x",commentPtr);
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reader.readI(); // reserved
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reader.read(chanPan,64);
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reader.read(chanVol,64);
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reader.read(orders,ordersLen);
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for (int i=0; i<ordersLen; i++) {
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for (int j=0; j<DIV_MAX_CHANS; j++) {
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ds.subsong[0]->orders.ord[j][i]=orders[i];
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}
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}
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ds.subsong[0]->ordersLen=ordersLen;
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for (int i=0; i<ds.insLen; i++) {
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insPtr[i]=reader.readI();
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}
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for (int i=0; i<ds.sampleLen; i++) {
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samplePtr[i]=reader.readI();
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}
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for (int i=0; i<patCount; i++) {
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patPtr[i]=reader.readI();
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}
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// read instruments
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for (int i=0; i<ds.insLen; i++) {
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DivInstrument* ins=new DivInstrument;
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ds.ins.push_back(ins);
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}
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// read samples
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for (int i=0; i<ds.sampleLen; i++) {
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DivSample* s=new DivSample;
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ds.sample.push_back(s);
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}
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// read patterns
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for (int i=0; i<patCount; i++) {
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unsigned char mask[64];
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unsigned char note[64];
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unsigned char ins[64];
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unsigned char vol[64];
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unsigned char effect[64];
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unsigned char effectVal[64];
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int curRow=0;
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memset(mask,0,64);
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memset(note,0,64);
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memset(ins,0,64);
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memset(vol,0,64);
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memset(effect,0,64);
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memset(effectVal,0,64);
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logV("reading pattern %d...",i);
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if (!reader.seek(patPtr[i],SEEK_SET)) {
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logE("premature end of file!");
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lastError="incomplete file";
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delete[] file;
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return false;
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}
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unsigned int dataLen=(unsigned short)reader.readS();
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unsigned short patRows=reader.readS();
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reader.readI(); // x
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dataLen+=reader.tell();
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// read pattern data
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while (reader.tell()<dataLen) {
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unsigned char chan=reader.readC();
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bool hasNote=false;
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bool hasIns=false;
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bool hasVol=false;
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bool hasEffect=false;
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if (chan==0) {
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curRow++;
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if (curRow>=patRows) break;
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continue;
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}
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if (chan&128) {
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mask[chan&63]=reader.readC();
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}
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chan&=63;
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if (mask[chan]&1) {
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note[chan]=reader.readC();
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hasNote=true;
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}
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if (mask[chan]&2) {
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ins[chan]=reader.readC();
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hasIns=true;
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}
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if (mask[chan]&4) {
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vol[chan]=reader.readC();
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hasVol=true;
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}
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if (mask[chan]&8) {
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effect[chan]=reader.readC();
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effectVal[chan]=reader.readC();
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hasEffect=true;
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}
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if (mask[chan]&16) {
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hasNote=true;
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}
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if (mask[chan]&32) {
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hasIns=true;
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}
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if (mask[chan]&64) {
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hasVol=true;
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}
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if (mask[chan]&128) {
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hasEffect=true;
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}
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DivPattern* p=ds.subsong[0]->pat[chan].getPattern(i,true);
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if (hasNote) {
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if (note[chan]==255) { // note off
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p->data[curRow][0]=100;
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p->data[curRow][1]=0;
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} else if (note[chan]==254) { // note release
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p->data[curRow][0]=101;
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p->data[curRow][1]=0;
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} else if (note[chan]<120) {
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p->data[curRow][0]=note[chan]%12;
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p->data[curRow][1]=note[chan]/12;
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if (p->data[curRow][0]==0) {
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p->data[curRow][0]=12;
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p->data[curRow][1]--;
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}
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}
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}
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if (hasIns) {
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p->data[curRow][2]=ins[chan]-1;
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}
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if (hasVol) {
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p->data[curRow][3]=vol[chan];
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}
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if (hasEffect) {
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//p->data[curRow][4]=effect[chan];
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//p->data[curRow][5]=effectVal[chan];
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}
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}
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}
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logV("DAMN IT: %x",insPtr[0]);
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logV("DAMN IT: %x",samplePtr[0]);
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if (active) quitDispatch();
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BUSY_BEGIN_SOFT;
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saveLock.lock();
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