Add convenience internal isParameterInput, and use it

distrho/src/DistrhoPluginInternal.hpp

@@ -346,9 +346,14 @@ public:
         return fData->parameters[index].designation;
     }
 
+    bool isParameterInput(const uint32_t index) const noexcept
+    {
+        return (getParameterHints(index) & kParameterIsOutput) == 0x0;
+    }
+
     bool isParameterOutput(const uint32_t index) const noexcept
     {
-        return (getParameterHints(index) & kParameterIsOutput);
+        return (getParameterHints(index) & kParameterIsOutput) != 0x0;
     }
 
     const String& getParameterName(const uint32_t index) const noexcept

distrho/src/DistrhoPluginLADSPA+DSSI.cpp

@@ -187,7 +187,7 @@ public:
 
             curValue = *fPortControls[i];
 
-            if (d_isNotEqual(fLastControlValues[i], curValue) && ! fPlugin.isParameterOutput(i))
+            if (fPlugin.isParameterInput(i) && d_isNotEqual(fLastControlValues[i], curValue))
             {
                 fLastControlValues[i] = curValue;
                 fPlugin.setParameterValue(i, curValue);

distrho/src/DistrhoPluginLV2.cpp

@@ -519,7 +519,7 @@ public:
 
             curValue = *fPortControls[i];
 
-            if (d_isNotEqual(fLastControlValues[i], curValue) && ! fPlugin.isParameterOutput(i))
+            if (fPlugin.isParameterInput(i) && d_isNotEqual(fLastControlValues[i], curValue))
             {
                 fLastControlValues[i] = curValue;
 

distrho/src/DistrhoPluginLV2export.cpp

@@ -399,7 +399,7 @@ void lv2_generate_ttl(const char* const basename)
                 bool designated = false;
 
                 // designation
-                if (! plugin.isParameterOutput(i))
+                if (plugin.isParameterInput(i))
                 {
                     switch (plugin.getParameterDesignation(i))
                     {
@@ -435,14 +435,14 @@ void lv2_generate_ttl(const char* const basename)
 
                     if (plugin.getParameterHints(i) & kParameterIsInteger)
                     {
-                        if (! plugin.isParameterOutput(i))
+                        if (plugin.isParameterInput(i))
                             pluginString += "        lv2:default " + String(int(plugin.getParameterValue(i))) + " ;\n";
                         pluginString += "        lv2:minimum " + String(int(ranges.min)) + " ;\n";
                         pluginString += "        lv2:maximum " + String(int(ranges.max)) + " ;\n";
                     }
                     else
                     {
-                        if (! plugin.isParameterOutput(i))
+                        if (plugin.isParameterInput(i))
                             pluginString += "        lv2:default " + String(plugin.getParameterValue(i)) + " ;\n";
                         pluginString += "        lv2:minimum " + String(ranges.min) + " ;\n";
                         pluginString += "        lv2:maximum " + String(ranges.max) + " ;\n";
@@ -531,7 +531,7 @@ void lv2_generate_ttl(const char* const basename)
                         pluginString += "        lv2:portProperty lv2:integer ;\n";
                     if (hints & kParameterIsLogarithmic)
                         pluginString += "        lv2:portProperty <" LV2_PORT_PROPS__logarithmic "> ;\n";
-                    if ((hints & kParameterIsAutomable) == 0 && ! plugin.isParameterOutput(i))
+                    if ((hints & kParameterIsAutomable) == 0 && plugin.isParameterInput(i))
                     {
                         pluginString += "        lv2:portProperty <" LV2_PORT_PROPS__expensive "> ,\n";
                         pluginString += "                         <" LV2_KXSTUDIO_PROPERTIES__NonAutomable "> ;\n";

distrho/src/DistrhoPluginVST.cpp

@@ -1331,7 +1331,7 @@ const AEffect* VSTPluginMain(audioMasterCallback audioMaster)
 
     for (uint32_t i=0, count=plugin->getParameterCount(); i < count; ++i)
     {
-        if (! plugin->isParameterOutput(i))
+        if (plugin->isParameterInput(i))
         {
             // parameter outputs must be all at the end
             DISTRHO_SAFE_ASSERT_BREAK(! outputsReached);