Projucer: Add a setting to configure the number of MIDI inputs and outputs for VST plug-ins

extras/Projucer/Source/Project/jucer_Project.cpp

@@ -266,6 +266,9 @@ void Project::initialiseAudioPluginValues()
     pluginVST3CategoryValue.referTo          (projectRoot, Ids::pluginVST3Category,         getUndoManager(), getDefaultVST3Categories(), ",");
     pluginRTASCategoryValue.referTo          (projectRoot, Ids::pluginRTASCategory,         getUndoManager(), getDefaultRTASCategories(), ",");
     pluginAAXCategoryValue.referTo           (projectRoot, Ids::pluginAAXCategory,          getUndoManager(), getDefaultAAXCategories(),  ",");
+
+    pluginVSTNumMidiInputsValue.referTo      (projectRoot, Ids::pluginVSTNumMidiInputs,     getUndoManager(), 16);
+    pluginVSTNumMidiOutputsValue.referTo     (projectRoot, Ids::pluginVSTNumMidiOutputs,    getUndoManager(), 16);
 }
 
 void Project::updateOldStyleConfigList()
@@ -1089,6 +1092,25 @@ void Project::createAudioPluginPropertyEditors (PropertyListBuilder& props)
                "Check this box if your plug-in is sandbox safe. A sand-box safe plug-in is loaded in a restricted path and can only access it's own bundle resources and "
                "the Music folder. Your plug-in must be able to deal with this. Newer versions of GarageBand require this to be enabled.");
 
+    {
+        Array<var> varChoices;
+        StringArray stringChoices;
+
+        for (int i = 1; i <= 16; ++i)
+        {
+            varChoices.add (i);
+            stringChoices.add (String (i));
+        }
+
+        props.add (new ChoicePropertyComponentWithEnablement (pluginVSTNumMidiInputsValue, pluginCharacteristicsValue, Ids::pluginWantsMidiIn,
+                                                              "Plugin VST Num MIDI Inputs",  stringChoices, varChoices),
+                   "For VST and VST3 plug-ins that accept MIDI, this allows you to configure the number of inputs.");
+
+        props.add (new ChoicePropertyComponentWithEnablement (pluginVSTNumMidiOutputsValue, pluginCharacteristicsValue, Ids::pluginProducesMidiOut,
+                                                              "Plugin VST Num MIDI Outputs", stringChoices, varChoices),
+                   "For VST and VST3 plug-ins that produce MIDI, this allows you to configure the number of outputs.");
+    }
+
     {
         Array<var> vst3CategoryVars;
 

extras/Projucer/Source/Project/jucer_Project.h

@@ -142,7 +142,8 @@ public:
     String getPluginChannelConfigsString() const      { return pluginChannelConfigsValue.get(); }
     String getAAXIdentifierString() const             { return pluginAAXIdentifierValue.get(); }
     String getPluginAUExportPrefixString() const      { return pluginAUExportPrefixValue.get(); }
-    String getPluginAUMainTypeString() const          { return pluginAUMainTypeValue.get(); }
+    String getVSTNumMIDIInputsString() const          { return pluginVSTNumMidiInputsValue.get(); }
+    String getVSTNumMIDIOutputsString() const         { return pluginVSTNumMidiOutputsValue.get(); }
 
     //==============================================================================
     static bool checkMultiChoiceVar (const ValueWithDefault& valueToCheck, Identifier idToCheck) noexcept
@@ -423,12 +424,13 @@ private:
 
     ValueWithDefault projectNameValue, projectUIDValue, projectLineFeedValue, projectTypeValue, versionValue, bundleIdentifierValue, companyNameValue,
                      companyCopyrightValue, companyWebsiteValue, companyEmailValue, displaySplashScreenValue, reportAppUsageValue, splashScreenColourValue, cppStandardValue,
-                     headerSearchPathsValue, preprocessorDefsValue, userNotesValue, maxBinaryFileSizeValue, includeBinaryDataInJuceHeaderValue, binaryDataNamespaceValue;
+                     headerSearchPathsValue, preprocessorDefsValue, userNotesValue, maxBinaryFileSizeValue, includeBinaryDataInJuceHeaderValue, binaryDataNamespaceValue,
+                     compilerFlagSchemesValue;
 
     ValueWithDefault pluginFormatsValue, pluginNameValue, pluginDescriptionValue, pluginManufacturerValue, pluginManufacturerCodeValue,
                      pluginCodeValue, pluginChannelConfigsValue, pluginCharacteristicsValue, pluginAUExportPrefixValue, pluginAAXIdentifierValue,
                      pluginAUMainTypeValue, pluginAUSandboxSafeValue, pluginRTASCategoryValue, pluginVSTCategoryValue, pluginVST3CategoryValue, pluginAAXCategoryValue,
-                     compilerFlagSchemesValue;
+                     pluginVSTNumMidiInputsValue, pluginVSTNumMidiOutputsValue;
 
     //==============================================================================
     std::unique_ptr<CompileEngineSettings> compileEngineSettings;

extras/Projucer/Source/ProjectSaving/jucer_ProjectSaver.cpp

@@ -123,6 +123,8 @@ void ProjectSaver::writePluginCharacteristicsFile()
     flags.set ("JucePlugin_IAAType",                     toCharLiteral (project.getIAATypeCode()));
     flags.set ("JucePlugin_IAASubType",                  "JucePlugin_PluginCode");
     flags.set ("JucePlugin_IAAName",                     project.getIAAPluginName().quoted());
+    flags.set ("JucePlugin_VSTNumMidiInputs",            project.getVSTNumMIDIInputsString());
+    flags.set ("JucePlugin_VSTNumMidiOutputs",           project.getVSTNumMIDIOutputsString());
 
     {
         String plugInChannelConfig = project.getPluginChannelConfigsString();

extras/Projucer/Source/Utility/Helpers/jucer_PresetIDs.h

@@ -337,6 +337,8 @@ namespace Ids
     DECLARE_ID (pluginAAXCategory);
     DECLARE_ID (pluginAAXDisableBypass);
     DECLARE_ID (pluginAAXDisableMultiMono);
+    DECLARE_ID (pluginVSTNumMidiInputs);
+    DECLARE_ID (pluginVSTNumMidiOutputs);
     DECLARE_ID (exporters);
     DECLARE_ID (website);
     DECLARE_ID (mainClass);

extras/Projucer/Source/Utility/UI/PropertyComponents/jucer_PropertyComponentsWithEnablement.h

@@ -69,7 +69,23 @@ public:
           value (valueToListenTo.getPropertyAsValue())
     {
         value.addListener (this);
-        setEnabled (valueWithDefault.get());
+        valueChanged (value);
+    }
+
+    ChoicePropertyComponentWithEnablement (ValueWithDefault& valueToControl,
+                                           ValueWithDefault valueToListenTo,
+                                           const Identifier& multiChoiceID,
+                                           const String& propertyName,
+                                           const StringArray& choices,
+                                           const Array<var>& correspondingValues)
+        : ChoicePropertyComponentWithEnablement (valueToControl, valueToListenTo, propertyName, choices, correspondingValues)
+    {
+        jassert (valueToListenTo.get().getArray() != nullptr);
+
+        isMultiChoice = true;
+        idToCheck = multiChoiceID;
+
+        valueChanged (value);
     }
 
     ~ChoicePropertyComponentWithEnablement() override    { value.removeListener (this); }
@@ -78,5 +94,27 @@ private:
     ValueWithDefault valueWithDefault;
     Value value;
 
-    void valueChanged (Value&) override         { setEnabled (valueWithDefault.get()); }
+    bool isMultiChoice = false;
+    Identifier idToCheck;
+
+    bool checkMultiChoiceVar() const
+    {
+        jassert (isMultiChoice);
+
+        auto v = valueWithDefault.get();
+
+        if (auto* varArray = v.getArray())
+            return varArray->contains (idToCheck.toString());
+
+        jassertfalse;
+        return false;
+    }
+
+    void valueChanged (Value&) override
+    {
+        if (isMultiChoice)
+            setEnabled (checkMultiChoiceVar());
+        else
+            setEnabled (valueWithDefault.get());
+    }
 };

modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp

@@ -2230,7 +2230,11 @@ private:
     pointer_sized_int handleGetNumMidiInputChannels()
     {
        #if JucePlugin_WantsMidiInput || JucePlugin_IsMidiEffect
-        return 16;
+        #ifdef JucePlugin_VSTNumMidiInputs
+         return JucePlugin_VSTNumMidiInputs;
+        #else
+         return 16;
+        #endif
        #else
         return 0;
        #endif
@@ -2239,7 +2243,11 @@ private:
     pointer_sized_int handleGetNumMidiOutputChannels()
     {
        #if JucePlugin_ProducesMidiOutput || JucePlugin_IsMidiEffect
-        return 16;
+        #ifdef JucePlugin_VSTNumMidiOutputs
+         return JucePlugin_VSTNumMidiOutputs;
+        #else
+         return 16;
+        #endif
        #else
         return 0;
        #endif

modules/juce_audio_plugin_client/VST3/juce_VST3_Wrapper.cpp

@@ -2047,7 +2047,13 @@ public:
             {
                 info.mediaType = Vst::kEvent;
                 info.direction = dir;
+
+               #ifdef JucePlugin_VSTNumMidiInputs
+                info.channelCount = JucePlugin_VSTNumMidiInputs;
+               #else
                 info.channelCount = 16;
+               #endif
+
                 toString128 (info.name, TRANS("MIDI Input"));
                 info.busType = Vst::kMain;
                 return kResultTrue;
@@ -2059,7 +2065,13 @@ public:
             {
                 info.mediaType = Vst::kEvent;
                 info.direction = dir;
+
+               #ifdef JucePlugin_VSTNumMidiOutputs
+                info.channelCount = JucePlugin_VSTNumMidiOutputs;
+               #else
                 info.channelCount = 16;
+               #endif
+
                 toString128 (info.name, TRANS("MIDI Output"));
                 info.busType = Vst::kMain;
                 return kResultTrue;