Don't trigger ENGINE_CALLBACK_UPDATE under certain conditions

source/backend/CarlaEngine.hpp

@@ -1036,6 +1036,11 @@ public:
      */
     bool setAboutToClose() noexcept;
 
+    /*!
+     * TODO.
+     */
+    bool isLoadingProject() const noexcept;
+
     // -------------------------------------------------------------------
     // Options
 

source/backend/engine/CarlaEngine.cpp

@@ -1301,6 +1301,11 @@ bool CarlaEngine::setAboutToClose() noexcept
     return (pData->isIdling == 0);
 }
 
+bool CarlaEngine::isLoadingProject() const noexcept
+{
+    return pData->loadingProject;
+}
+
 // -----------------------------------------------------------------------
 // Global options
 

source/backend/plugin/CarlaPlugin.cpp

@@ -888,9 +888,10 @@ void CarlaPlugin::loadStateSave(const CarlaStateSave& stateSave)
     setPanning(stateSave.panning, true, true);
     setCtrlChannel(stateSave.ctrlChannel, true, true);
     setActive(stateSave.active, true, true);
-#endif
 
-    pData->engine->callback(ENGINE_CALLBACK_UPDATE, pData->id, 0, 0, 0.0f, nullptr);
+    if (! pData->engine->isLoadingProject())
+        pData->engine->callback(ENGINE_CALLBACK_UPDATE, pData->id, 0, 0, 0.0f, nullptr);
+#endif
 }
 
 bool CarlaPlugin::saveStateToFile(const char* const filename)

source/backend/plugin/CarlaPluginVST2.cpp

@@ -2085,7 +2085,9 @@ protected:
                 }
             }
 
-            pData->engine->callback(ENGINE_CALLBACK_UPDATE, pData->id, 0, 0, 0.0f, nullptr);
+            if (! fIsInitializing)
+                pData->engine->callback(ENGINE_CALLBACK_UPDATE, pData->id, 0, 0, 0.0f, nullptr);
+
             ret = 1;
             break;