VST3: Added the ability to change parameter names at runtime

modules/juce_audio_plugin_client/VST3/juce_VST3_Wrapper.cpp

@@ -429,9 +429,7 @@ public:
             info.id = vstParamID;
             info.unitId = vstUnitID;
 
-            toString128 (info.title,      param.getName (128));
-            toString128 (info.shortTitle, param.getName (8));
-            toString128 (info.units,      param.getLabel());
+            updateParameterInfo();
 
             info.stepCount = (Steinberg::int32) 0;
 
@@ -460,6 +458,13 @@ public:
 
         virtual ~Param() override = default;
 
+        void updateParameterInfo()
+        {
+            toString128 (info.title,      param.getName (128));
+            toString128 (info.shortTitle, param.getName (8));
+            toString128 (info.units,      param.getLabel());
+        }
+
         bool setNormalized (Vst::ParamValue v) override
         {
             v = jlimit (0.0, 1.0, v);
@@ -887,6 +892,12 @@ public:
 
     void audioProcessorChanged (AudioProcessor*) override
     {
+        auto numParameters = parameters.getParameterCount();
+
+        for (int32 i = 0; i < numParameters; ++i)
+            if (auto* param = dynamic_cast<Param*> (parameters.getParameterByIndex (i)))
+                param->updateParameterInfo();
+
         if (auto* pluginInstance = getPluginInstance())
         {
             if (pluginInstance->getNumPrograms() > 1)
@@ -895,7 +906,7 @@ public:
         }
 
         if (componentHandler != nullptr && ! inSetupProcessing)
-            componentHandler->restartComponent (Vst::kLatencyChanged | Vst::kParamValuesChanged);
+            componentHandler->restartComponent (Vst::kLatencyChanged | Vst::kParamValuesChanged | Vst::kParamTitlesChanged);
     }
 
     void parameterValueChanged (int, float newValue) override