Carla: Add hack to make rncbc's [bad] plugins produce sound

c++/carla-backend/lv2.cpp

@@ -260,6 +260,8 @@ public:
         lastTimePosPlaying = false;
         lastTimePosFrame   = 0;
 
+        needsMidiConnectHack = false;
+
         for (uint32_t i=0; i < CARLA_URI_MAP_ID_COUNT; i++)
             customURIDs.push_back(nullptr);
 
@@ -2574,6 +2576,20 @@ public:
                 }
             }
 
+            // HACK: rncbc's plugins require midi connect_port before each run()
+            if (needsMidiConnectHack)
+            {
+                for (i=0; i < evIn.count; i++)
+                {
+                    if (evIn.data[i].type & CARLA_EVENT_DATA_ATOM)
+                        descriptor->connect_port(handle, evIn.data[i].rindex, evIn.data[i].atom);
+                    else if (evIn.data[i].type & CARLA_EVENT_DATA_EVENT)
+                        descriptor->connect_port(handle, evIn.data[i].rindex, evIn.data[i].event);
+                    else if (evIn.data[i].type & CARLA_EVENT_DATA_MIDI_LL)
+                        descriptor->connect_port(handle, evIn.data[i].rindex, evIn.data[i].midi);
+                }
+            }
+
             for (i=0; i < aIn.count; i++)
             {
                 if (i == 0 || ! h2) descriptor->connect_port(handle, aIn.rindexes[i], inBuffer[i]);
@@ -4144,6 +4160,10 @@ public:
             return false;
         }
 
+        // HACK: rncbc's plugins require midi connect_port before each run()
+        if (strcmp(rdf_descriptor->Author, "rncbc aka. Rui Nuno Capela") == 0)
+            needsMidiConnectHack = true;
+
         // ---------------------------------------------------------------
         // get info
 
@@ -4562,6 +4582,9 @@ private:
     bool     lastTimePosPlaying;
     uint32_t lastTimePosFrame;
 
+    // HACK: rncbc's plugins require midi connect_port before each run()
+    bool needsMidiConnectHack;
+
     static unsigned int m_count;
     static std::set<const LV2_Lib_Descriptor*> libDescs;