Toob ML bug fixes.

src/JackHost.cpp

@@ -340,15 +340,18 @@ private:
                 portSubscription.samplesToNextCallback += portSubscription.sampleRate;
                 if (!portSubscription.waitingForAck)
                 {
-                    portSubscription.waitingForAck = true;
                     float value = realtimeActivePedalBoard->GetControlOutputValue(
                         portSubscription.instanceIndex,
                         portSubscription.portIndex);
-
-                    this->realtimeWriter.SendMonitorPortUpdate(
-                        portSubscription.callbackPtr,
-                        portSubscription.subscriptionHandle,
-                        value);
+                    if (value != portSubscription.lastValue)
+                    {
+                        portSubscription.waitingForAck = true;
+                        portSubscription.lastValue = value;
+                        this->realtimeWriter.SendMonitorPortUpdate(
+                            portSubscription.callbackPtr,
+                            portSubscription.subscriptionHandle,
+                            value);
+                    }
                 }
             }
         }

src/Lv2Effect.cpp

@@ -93,7 +93,15 @@ Lv2Effect::Lv2Effect(
 
     LV2_Feature **myFeatures = &this->features[0];
 
-    LilvInstance *pInstance = lilv_plugin_instantiate(pPlugin, pHost->GetSampleRate(), myFeatures);
+    LilvInstance *pInstance = nullptr;
+    try {
+        pInstance = lilv_plugin_instantiate(pPlugin, pHost->GetSampleRate(), myFeatures);
+    } catch (const std::exception &e)
+    {
+        this->pInstance = nullptr;
+        throw PiPedalException(SS("Plugin threw an exception: " << e.what()));
+
+    }
     this->pInstance = pInstance;
     if (this->pInstance == nullptr)
     {

src/RingBufferReader.hpp

@@ -64,6 +64,7 @@ namespace pipedal
         int sampleRate = 0;
         int samplesToNextCallback = 0;
         bool waitingForAck = false;
+        float lastValue = -1E30;
     };
 
     class RealtimeMonitorPortSubscriptions