MIDI input: program change pass-through option

src/engine/engine.cpp

@@ -3392,6 +3392,10 @@ void DivEngine::setMidiDirect(bool value) {
   midiIsDirect=value;
 }
 
+void DivEngine::setMidiDirectProgram(bool value) {
+  midiIsDirectProgram=value;
+}
+
 void DivEngine::setMidiVolExp(float value) {
   midiVolExp=value;
 }

src/engine/engine.h

@@ -176,16 +176,16 @@ struct DivNoteEvent {
   signed char channel;
   unsigned char ins;
   signed char note, volume;
-  bool on, nop, pad1, pad2;
+  bool on, nop, insChange, fromMIDI;
-  DivNoteEvent(int c, int i, int n, int v, bool o):
+  DivNoteEvent(int c, int i, int n, int v, bool o, bool ic=false, bool fm=false):
     channel(c),
     ins(i),
     note(n),
     volume(v),
     on(o),
     nop(false),
-    pad1(false),
+    insChange(ic),
-    pad2(false) {}
+    fromMIDI(fm) {}
   DivNoteEvent():
     channel(-1),
     ins(0),
@@ -193,8 +193,8 @@ struct DivNoteEvent {
     volume(-1),
     on(false),
     nop(true),
-    pad1(false),
+    insChange(false),
-    pad2(false) {}
+    fromMIDI(false) {}
 };
 
 struct DivDispatchContainer {
@@ -415,6 +415,7 @@ class DivEngine {
   bool firstTick;
   bool skipping;
   bool midiIsDirect;
+  bool midiIsDirectProgram;
   bool lowLatency;
   bool systemsRegistered;
   bool hasLoadedSomething;
@@ -1188,6 +1189,9 @@ class DivEngine {
     // set MIDI direct channel map
     void setMidiDirect(bool value);
 
+    // set MIDI direct program change
+    void setMidiDirectProgram(bool value);
+
     // set MIDI volume curve exponent
     void setMidiVolExp(float value);
 
@@ -1260,6 +1264,7 @@ class DivEngine {
       firstTick(false),
       skipping(false),
       midiIsDirect(false),
+      midiIsDirectProgram(false),
       lowLatency(false),
       systemsRegistered(false),
       hasLoadedSomething(false),

src/engine/playback.cpp

@@ -1370,8 +1370,15 @@ bool DivEngine::nextTick(bool noAccum, bool inhibitLowLat) {
       pendingNotes.pop_front();
       continue;
     }
+    if (note.insChange) {
+      dispatchCmd(DivCommand(DIV_CMD_INSTRUMENT,note.channel,note.ins,0));
+      pendingNotes.pop_front();
+      continue;
+    }
     if (note.on) {
+      if (!(midiIsDirect && midiIsDirectProgram && note.fromMIDI)) {
         dispatchCmd(DivCommand(DIV_CMD_INSTRUMENT,note.channel,note.ins,1));
+      }
       if (note.volume>=0 && !disCont[dispatchOfChan[note.channel]].dispatch->isVolGlobal()) {
         float curvedVol=pow((float)note.volume/127.0f,midiVolExp);
         int mappedVol=disCont[dispatchOfChan[note.channel]].dispatch->mapVelocity(dispatchChanOfChan[note.channel],curvedVol);
@@ -1832,7 +1839,7 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
         case TA_MIDI_NOTE_OFF: {
           if (chan<0 || chan>=chans) break;
           if (midiIsDirect) {
-            pendingNotes.push_back(DivNoteEvent(chan,-1,-1,-1,false));
+            pendingNotes.push_back(DivNoteEvent(chan,-1,-1,-1,false,false,true));
           } else {
             autoNoteOff(msg.type&15,msg.data[0]-12,msg.data[1]);
           }
@@ -1847,13 +1854,13 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
           if (chan<0 || chan>=chans) break;
           if (msg.data[1]==0) {
             if (midiIsDirect) {
-              pendingNotes.push_back(DivNoteEvent(chan,-1,-1,-1,false));
+              pendingNotes.push_back(DivNoteEvent(chan,-1,-1,-1,false,false,true));
             } else {
               autoNoteOff(msg.type&15,msg.data[0]-12,msg.data[1]);
             }
           } else {
             if (midiIsDirect) {
-              pendingNotes.push_back(DivNoteEvent(chan,ins,msg.data[0]-12,msg.data[1],true));
+              pendingNotes.push_back(DivNoteEvent(chan,ins,msg.data[0]-12,msg.data[1],true,false,true));
             } else {
               autoNoteOn(msg.type&15,ins,msg.data[0]-12,msg.data[1]);
             }
@@ -1861,7 +1868,9 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
           break;
         }
         case TA_MIDI_PROGRAM: {
-          // TODO: change instrument event thingy
+          if (midiIsDirect && midiIsDirectProgram) {
+            pendingNotes.push_back(DivNoteEvent(chan,msg.data[0],0,0,false,true,true));
+          }
           break;
         }
       }

src/gui/gui.cpp

@@ -3803,7 +3803,7 @@ bool FurnaceGUI::loop() {
             }
             break;
           case TA_MIDI_PROGRAM:
-            if (midiMap.programChange) {
+            if (midiMap.programChange && !(midiMap.directChannel && midiMap.directProgram)) {
               curIns=msg.data[0];
               if (curIns>=(int)e->song.ins.size()) curIns=e->song.ins.size()-1;
               wavePreviewInit=true;
@@ -7018,6 +7018,7 @@ bool FurnaceGUI::init() {
       return -2;
     }
 
+    if (midiMap.directChannel && midiMap.directProgram) return -1;
     return curIns;
   });
 

src/gui/gui.h

@@ -936,7 +936,7 @@ struct MIDIMap {
   int**** map;
   std::vector<MIDIBind> binds;
 
-  bool noteInput, volInput, rawVolume, polyInput, directChannel, programChange, midiClock, midiTimeCode, yamahaFMResponse;
+  bool noteInput, volInput, rawVolume, polyInput, directChannel, programChange, midiClock, midiTimeCode, yamahaFMResponse, directProgram;
   // 0: disabled
   //
   // 1: C- C# D- D# E- F- F# G- G# A- A# B-
@@ -999,6 +999,7 @@ struct MIDIMap {
     midiClock(false),
     midiTimeCode(false),
     yamahaFMResponse(false),
+    directProgram(false),
     valueInputStyle(1),
     valueInputControlMSB(0),
     valueInputControlLSB(0),

src/gui/midiMap.cpp

@@ -139,6 +139,7 @@ bool MIDIMap::read(String path) {
         UNDERSTAND_OPTION(midiClock) else
         UNDERSTAND_OPTION(midiTimeCode) else
         UNDERSTAND_OPTION(yamahaFMResponse) else
+        UNDERSTAND_OPTION(directProgram) else
         UNDERSTAND_OPTION(valueInputStyle) else
         UNDERSTAND_OPTION(valueInputControlMSB) else
         UNDERSTAND_OPTION(valueInputControlLSB) else
@@ -205,6 +206,7 @@ bool MIDIMap::write(String path) {
   WRITE_OPTION(midiClock);
   WRITE_OPTION(midiTimeCode);
   WRITE_OPTION(yamahaFMResponse);
+  WRITE_OPTION(directProgram);
   WRITE_OPTION(valueInputStyle);
   WRITE_OPTION(valueInputControlMSB);
   WRITE_OPTION(valueInputControlLSB);

src/gui/settings.cpp

@@ -1141,10 +1141,19 @@ void FurnaceGUI::drawSettings() {
         //ImGui::Checkbox("Polyphonic/chord input",&midiMap.polyInput);
         if (ImGui::Checkbox("Map MIDI channels to direct channels",&midiMap.directChannel)) {
           e->setMidiDirect(midiMap.directChannel);
+          e->setMidiDirectProgram(midiMap.directChannel && midiMap.directProgram);
           settingsChanged=true;
         }
+        if (midiMap.directChannel) {
+          if (ImGui::Checkbox("Program change pass-through",&midiMap.directProgram)) {
+            e->setMidiDirectProgram(midiMap.directChannel && midiMap.directProgram);
+            settingsChanged=true;
+          }
+        }
         if (ImGui::Checkbox("Map Yamaha FM voice data to instruments",&midiMap.yamahaFMResponse)) settingsChanged=true;
+        if (!(midiMap.directChannel && midiMap.directProgram)) {
           if (ImGui::Checkbox("Program change is instrument selection",&midiMap.programChange)) settingsChanged=true;
+        }
         //ImGui::Checkbox("Listen to MIDI clock",&midiMap.midiClock);
         //ImGui::Checkbox("Listen to MIDI time code",&midiMap.midiTimeCode);
         if (ImGui::Combo("Value input style",&midiMap.valueInputStyle,valueInputStyles,7)) settingsChanged=true;
@@ -4029,6 +4038,7 @@ void FurnaceGUI::syncSettings() {
   midiMap.compile();
 
   e->setMidiDirect(midiMap.directChannel);
+  e->setMidiDirectProgram(midiMap.directChannel && midiMap.directProgram);
   e->setMidiVolExp(midiMap.volExp);
   e->setMetronomeVol(((float)settings.metroVol)/100.0f);
   e->setSamplePreviewVol(((float)settings.sampleVol)/100.0f);