possibly fix timer issues

issue #2189

src/engine/engine.cpp

@@ -1655,6 +1655,7 @@ void DivEngine::playSub(bool preserveDrift, int goalRow) {
     ticks=1;
     tempoAccum=0;
     totalTicks=0;
+    totalTicksOff=0;
     totalSeconds=0;
     totalTicksR=0;
     curMidiClock=0;
@@ -3726,6 +3727,7 @@ void DivEngine::quitDispatch() {
   changeOrd=-1;
   changePos=0;
   totalTicks=0;
+  totalTicksOff=0;
   totalSeconds=0;
   totalTicksR=0;
   curMidiClock=0;

src/engine/engine.h

@@ -487,6 +487,7 @@ class DivEngine {
   double midiTimeDrift;
   int stepPlay;
   int changeOrd, changePos, totalSeconds, totalTicks, totalTicksR, curMidiClock, curMidiTime, totalCmds, lastCmds, cmdsPerSecond, globalPitch;
+  double totalTicksOff;
   int curMidiTimePiece, curMidiTimeCode;
   unsigned char extValue, pendingMetroTick;
   DivGroovePattern speeds;
@@ -1451,6 +1452,7 @@ class DivEngine {
       lastCmds(0),
       cmdsPerSecond(0),
       globalPitch(0),
+      totalTicksOff(0.0),
       curMidiTimePiece(0),
       curMidiTimeCode(0),
       extValue(0),

src/engine/playback.cpp

@@ -2000,8 +2000,17 @@ bool DivEngine::nextTick(bool noAccum, bool inhibitLowLat) {
   if (!freelance) {
     if (stepPlay!=1) {
       if (!noAccum) {
+        double dt=divider*tickMult;
+        if (skipping) {
+          dt*=(double)virtualTempoN/(double)MAX(1,virtualTempoD);
+        }
         totalTicksR++;
-        totalTicks+=1000000/(divider*tickMult);
+        totalTicks+=1000000/dt;
+        totalTicksOff+=fmod(1000000.0,dt);
+        while (totalTicksOff>=dt) {
+          totalTicksOff-=dt;
+          totalTicks++;
+        }
       }
       if (totalTicks>=1000000) {
         totalTicks-=1000000;

src/gui/orders.cpp

@@ -87,6 +87,41 @@ void FurnaceGUI::drawMobileOrderSel() {
       orderScrollLocked=true;
       orderScrollTolerance=true;
     }
+
+    // time
+    if (e->isPlaying() && settings.playbackTime) {
+      int totalTicks=e->getTotalTicks();
+      int totalSeconds=e->getTotalSeconds();
+      String info="";
+
+      if (totalSeconds==0x7fffffff) {
+        info="∞";
+      } else {
+        if (totalSeconds>=86400) {
+          int totalDays=totalSeconds/86400;
+          int totalYears=totalDays/365;
+          totalDays%=365;
+          int totalMonths=totalDays/30;
+          totalDays%=30;
+
+          info+=fmt::sprintf("%dy",totalYears);
+          info+=fmt::sprintf("%dm",totalMonths);
+          info+=fmt::sprintf("%dd",totalDays);
+        }
+
+        if (totalSeconds>=3600) {
+          info+=fmt::sprintf("%.2d:",(totalSeconds/3600)%24);
+        }
+
+        info+=fmt::sprintf("%.2d:%.2d.%.2d",(totalSeconds/60)%60,totalSeconds%60,totalTicks/10000);
+      }
+
+      ImVec2 textSize=ImGui::CalcTextSize(info.c_str());
+
+      dl->AddRectFilled(ImVec2(11.0f*dpiScale,(size.y*0.5)-(5.0f*dpiScale)),ImVec2((21.0f*dpiScale)+textSize.x,(size.y*0.5)+textSize.y+(5.0f*dpiScale)),ImGui::GetColorU32(ImGuiCol_WindowBg));
+      dl->AddRect(ImVec2(11.0f*dpiScale,(size.y*0.5)-(5.0f*dpiScale)),ImVec2((21.0f*dpiScale)+textSize.x,(size.y*0.5)+textSize.y+(5.0f*dpiScale)),ImGui::GetColorU32(ImGuiCol_Border),0,0,dpiScale);
+      dl->AddText(ImVec2(16.0f*dpiScale,(size.y)*0.5),ImGui::GetColorU32(ImGuiCol_Text),info.c_str());
+    }
   }
   ImGui::End();
 }