Fully implement IParameterFunctionName

We now support all VST 3.7.1 interfaces! At least, in theory we do.

src/common/serialization/vst3.h

@@ -103,6 +103,7 @@ using ControlRequest =
                  YaNoteExpressionController::GetNoteExpressionValueByString,
                  YaNoteExpressionPhysicalUIMapping::GetNotePhysicalUIMapping,
                  YaParameterFinder::FindParameter,
+                 YaParameterFunctionName::GetParameterIDFromFunctionName,
                  YaPlugView::IsPlatformTypeSupported,
                  YaPlugView::Attached,
                  YaPlugView::Removed,

src/plugin/bridges/vst3-impls/plugin-proxy.cpp

@@ -692,11 +692,23 @@ tresult PLUGIN_API Vst3PluginProxyImpl::getParameterIDFromFunctionName(
     Steinberg::Vst::UnitID unitID,
     Steinberg::FIDString functionName,
     Steinberg::Vst::ParamID& paramID) {
-    // TODO: Implement
-    bridge.logger.log(
-        "TODO: Implement "
-        "IParameterFunctionName::getParameterIDFromFunctionName()");
-    return Steinberg::kNotImplemented;
+    if (functionName) {
+        const GetParameterIDFromFunctionNameResponse response =
+            bridge.send_message(
+                YaParameterFunctionName::GetParameterIDFromFunctionName{
+                    .instance_id = instance_id(),
+                    .unit_id = unitID,
+                    .function_name = functionName});
+
+        paramID = response.param_id;
+
+        return response.result;
+    } else {
+        bridge.logger.log(
+            "WARNING: Null pointer passed to "
+            "'IParameterFunctionName::getParameterIDFromFunctionName()'");
+        return Steinberg::kInvalidArgument;
+    }
 }
 
 tresult PLUGIN_API Vst3PluginProxyImpl::initialize(FUnknown* context) {

src/wine-host/bridges/vst3.cpp

@@ -55,6 +55,7 @@ InstanceInterfaces::InstanceInterfaces(
       note_expression_physical_ui_mapping(object),
       plugin_base(object),
       unit_data(object),
+      parameter_function_name(object),
       prefetchable_support(object),
       process_context_requirements(object),
       program_list_data(object),
@@ -573,6 +574,23 @@ void Vst3Bridge::run() {
                 return YaParameterFinder::FindParameterResponse{
                     .result = result, .result_tag = result_tag};
             },
+            [&](const YaParameterFunctionName::GetParameterIDFromFunctionName&
+                    request) -> YaParameterFunctionName::
+                                 GetParameterIDFromFunctionName::Response {
+                                     Steinberg::Vst::ParamID param_id;
+                                     const tresult result =
+                                         object_instances[request.instance_id]
+                                             .parameter_function_name
+                                             ->getParameterIDFromFunctionName(
+                                                 request.unit_id,
+                                                 request.function_name.c_str(),
+                                                 param_id);
+
+                                     return YaParameterFunctionName::
+                                         GetParameterIDFromFunctionNameResponse{
+                                             .result = result,
+                                             .param_id = param_id};
+                                 },
             [&](const YaPlugView::IsPlatformTypeSupported& request)
                 -> YaPlugView::IsPlatformTypeSupported::Response {
                 // The host will of course want to pass an X11 window ID for the

src/wine-host/bridges/vst3.h

@@ -169,6 +169,8 @@ struct InstanceInterfaces {
         note_expression_physical_ui_mapping;
     Steinberg::FUnknownPtr<Steinberg::IPluginBase> plugin_base;
     Steinberg::FUnknownPtr<Steinberg::Vst::IUnitData> unit_data;
+    Steinberg::FUnknownPtr<Steinberg::Vst::IParameterFunctionName>
+        parameter_function_name;
     Steinberg::FUnknownPtr<Steinberg::Vst::IPrefetchableSupport>
         prefetchable_support;
     Steinberg::FUnknownPtr<Steinberg::Vst::IProcessContextRequirements>