kind of MIDI output

src/engine/engine.cpp

@@ -790,13 +790,20 @@ void DivEngine::playSub(bool preserveDrift, int goalRow) {
   }
   speedAB=false;
   playing=true;
+  skipping=true;
   for (int i=0; i<song.systemLen; i++) disCont[i].dispatch->setSkipRegisterWrites(true);
   while (playing && curOrder<goal) {
-    if (nextTick(preserveDrift)) return;
+    if (nextTick(preserveDrift)) {
+      skipping=false;
+      return;
+    }
   }
   int oldOrder=curOrder;
   while (playing && curRow<goalRow) {
-    if (nextTick(preserveDrift)) return;
+    if (nextTick(preserveDrift)) {
+      skipping=false;
+      return;
+    }
     if (oldOrder!=curOrder) break;
   }
   for (int i=0; i<song.systemLen; i++) disCont[i].dispatch->setSkipRegisterWrites(false);
@@ -816,6 +823,7 @@ void DivEngine::playSub(bool preserveDrift, int goalRow) {
   if (!preserveDrift) {
     ticks=1;
   }
+  skipping=false;
   cmdStream.clear();
 }
 
@@ -2864,6 +2872,16 @@ bool DivEngine::initAudioBackend() {
       }
     }
   }
+  if (output->midiOut) {
+    String outName=getConfString("midiOutDevice","");
+    if (!outName.empty()) {
+      // try opening device
+      logI("opening MIDI output.\n");
+      if (!output->midiOut->openDevice(outName)) {
+        logW("could not open MIDI output device!\n");
+      }
+    }
+  }
 
   return true;
 }
@@ -2876,6 +2894,12 @@ bool DivEngine::deinitAudioBackend() {
         output->midiIn->closeDevice();
       }
     }
+    if (output->midiOut) {
+      if (output->midiOut->isDeviceOpen()) {
+        logI("closing MIDI output.\n");
+        output->midiOut->closeDevice();
+      }
+    }
     output->quitMidi();
     output->quit();
     delete output;

src/engine/engine.h

@@ -86,7 +86,7 @@ struct DivChannelState {
   bool doNote, legato, portaStop, keyOn, keyOff, nowYouCanStop, stopOnOff;
   bool arpYield, delayLocked, inPorta, scheduledSlideReset, shorthandPorta, noteOnInhibit, resetArp;
 
-  int midiNote;
+  int midiNote, curMidiNote;
 
   DivChannelState():
     note(-1),
@@ -129,7 +129,8 @@ struct DivChannelState {
     shorthandPorta(false),
     noteOnInhibit(false),
     resetArp(false),
-    midiNote(-1) {}
+    midiNote(-1),
+    curMidiNote(-1) {}
 };
 
 struct DivNoteEvent {
@@ -194,6 +195,7 @@ class DivEngine {
   bool cmdStreamEnabled;
   bool softLocked;
   bool firstTick;
+  bool skipping;
   int softLockCount;
   int ticks, curRow, curOrder, remainingLoops, nextSpeed;
   double divider;
@@ -712,6 +714,7 @@ class DivEngine {
       cmdStreamEnabled(false),
       softLocked(false),
       firstTick(false),
+      skipping(false),
       softLockCount(0),
       ticks(0),
       curRow(0),

src/engine/playback.cpp

@@ -172,7 +172,49 @@ int DivEngine::dispatchCmd(DivCommand c) {
   if (cmdStreamEnabled && cmdStream.size()<2000) {
     cmdStream.push_back(c);
   }
+
+  if (!skipping && output->midiOut!=NULL) {
+    if (output->midiOut->isDeviceOpen()) {
+      int scaledVol=(chan[c.chan].volume*127)/MAX(1,chan[c.chan].volMax);
+      if (scaledVol<0) scaledVol=0;
+      if (scaledVol>127) scaledVol=127;
+      switch (c.cmd) {
+        case DIV_CMD_NOTE_ON:
+        case DIV_CMD_LEGATO:
+          if (chan[c.chan].curMidiNote>=0) {
+            output->midiOut->send(TAMidiMessage(0x80|(c.chan&15),chan[c.chan].curMidiNote,scaledVol));
+          }
+          if (c.value!=DIV_NOTE_NULL) chan[c.chan].curMidiNote=c.value+12;
+          output->midiOut->send(TAMidiMessage(0x90|(c.chan&15),chan[c.chan].curMidiNote,scaledVol));
+          break;
+        case DIV_CMD_NOTE_OFF:
+        case DIV_CMD_NOTE_OFF_ENV:
+          if (chan[c.chan].curMidiNote>=0) {
+            output->midiOut->send(TAMidiMessage(0x80|(c.chan&15),chan[c.chan].curMidiNote,scaledVol));
+          }
+          chan[c.chan].curMidiNote=-1;
+          break;
+        case DIV_CMD_INSTRUMENT:
+          output->midiOut->send(TAMidiMessage(0xc0|(c.chan&15),c.value,0));
+          break;
+        case DIV_CMD_VOLUME:
+          //output->midiOut->send(TAMidiMessage(0xb0|(c.chan&15),0x07,scaledVol));
+          break;
+        case DIV_CMD_PITCH: {
+          int pitchBend=8192+(c.value<<5);
+          if (pitchBend<0) pitchBend=0;
+          if (pitchBend>16383) pitchBend=16383;
+          output->midiOut->send(TAMidiMessage(0xe0|(c.chan&15),pitchBend&0x7f,pitchBend>>7));
+          break;
+        }
+        default:
+          break;
+      }
+    }
+  }
+
   c.chan=dispatchChanOfChan[c.dis];
+
   return disCont[dispatchOfChan[c.dis]].dispatch->dispatch(c);
 }