add "auto-insert one tick gap" option

src/engine/engine.h

@@ -37,8 +37,8 @@
     warnings+=(String("\n")+x); \
   }
 
-#define DIV_VERSION "dev64"
-#define DIV_ENGINE_VERSION 64
+#define DIV_VERSION "dev65"
+#define DIV_ENGINE_VERSION 65
 
 enum DivStatusView {
   DIV_STATUS_NOTHING=0,

src/engine/fileOps.cpp

@@ -141,6 +141,7 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
     ds.brokenShortcutSlides=false;
     ds.ignoreDuplicateSlides=true;
     ds.brokenDACMode=true;
+    ds.oneTickCut=false;
 
     // 1.1 compat flags
     if (ds.version>24) {
@@ -803,6 +804,9 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
     if (ds.version<64) {
       ds.brokenDACMode=false;
     }
+    if (ds.version<65) {
+      ds.oneTickCut=false;
+    }
     ds.isDMF=false;
 
     reader.readS(); // reserved
@@ -984,7 +988,12 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
       } else {
         reader.readC();
       }
-      for (int i=0; i<3; i++) reader.readC();
+      if (ds.version>=65) {
+        ds.oneTickCut=reader.readC();
+      } else {
+        reader.readC();
+      }
+      for (int i=0; i<2; i++) reader.readC();
     } else {
       for (int i=0; i<20; i++) reader.readC();
     }
@@ -1427,7 +1436,8 @@ SafeWriter* DivEngine::saveFur() {
   w->writeC(song.stopPortaOnNoteOff);
   w->writeC(song.continuousVibrato);
   w->writeC(song.brokenDACMode);
-  for (int i=0; i<3; i++) {
+  w->writeC(song.oneTickCut);
+  for (int i=0; i<2; i++) {
     w->writeC(0);
   }
 

src/engine/playback.cpp

@@ -1067,7 +1067,24 @@ void DivEngine::nextRow() {
       if (pat->data[curRow][0]!=100 && pat->data[curRow][0]!=101 && pat->data[curRow][0]!=102) {
         if (!chan[i].legato) {
           dispatchCmd(DivCommand(DIV_CMD_PRE_NOTE,i,ticks));
-          //chan[i].cut=ticks;
+
+          if (song.oneTickCut) {
+            bool doPrepareCut=true;
+
+            for (int j=0; j<song.pat[i].effectRows; j++) {
+              if (pat->data[curRow][4+(j<<1)]==0x03) {
+                doPrepareCut=false;
+                break;
+              }
+              if (pat->data[curRow][4+(j<<1)]==0xea) {
+                if (pat->data[curRow][5+(j<<1)]>0) {
+                  doPrepareCut=false;
+                  break;
+                }
+              }
+            }
+            if (doPrepareCut) chan[i].cut=ticks;
+          }
         }
       }
     }

src/engine/song.h

@@ -296,6 +296,7 @@ struct DivSong {
   bool stopPortaOnNoteOff;
   bool continuousVibrato;
   bool brokenDACMode;
+  bool oneTickCut;
 
   DivOrders orders;
   std::vector<DivInstrument*> ins;
@@ -361,7 +362,8 @@ struct DivSong {
     ignoreDuplicateSlides(false),
     stopPortaOnNoteOff(false),
     continuousVibrato(false),
-    brokenDACMode(false) {
+    brokenDACMode(false),
+    oneTickCut(false) {
     for (int i=0; i<32; i++) {
       system[i]=DIV_SYSTEM_NULL;
       systemVol[i]=64;