Fully implement IPrefetchableSupport

src/common/serialization/vst3.h

@@ -163,7 +163,8 @@ using AudioProcessorRequest =
                  YaComponent::GetBusInfo,
                  YaComponent::GetRoutingInfo,
                  YaComponent::ActivateBus,
-                 YaComponent::SetActive>;
+                 YaComponent::SetActive,
+                 YaPrefetchableSupport::GetPrefetchableSupport>;
 
 template <typename S>
 void serialize(S& s, AudioProcessorRequest& payload) {

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

@@ -675,10 +675,14 @@ tresult PLUGIN_API Vst3PluginProxyImpl::terminate() {
 
 tresult PLUGIN_API Vst3PluginProxyImpl::getPrefetchableSupport(
     Steinberg::Vst::PrefetchableSupport& prefetchable /*out*/) {
-    // TODO: Implement
-    bridge.logger.log(
-        "TODO: Implement IPrefetchableSupport::getPrefetchableSupport()");
-    return Steinberg::kNotImplemented;
+    const GetPrefetchableSupportResponse response =
+        bridge.send_audio_processor_message(
+            YaPrefetchableSupport::GetPrefetchableSupport{.instance_id =
+                                                              instance_id()});
+
+    prefetchable = response.prefetchable;
+
+    return response.result;
 }
 
 tresult PLUGIN_API Vst3PluginProxyImpl::programDataSupported(

src/wine-host/bridges/vst3.cpp

@@ -50,6 +50,7 @@ InstanceInterfaces::InstanceInterfaces(
       note_expression_controller(object),
       plugin_base(object),
       unit_data(object),
+      prefetchable_support(object),
       program_list_data(object),
       unit_info(object),
       xml_representation_controller(object) {}
@@ -1103,6 +1104,22 @@ size_t Vst3Bridge::register_object_instance(
                         return object_instances[request.instance_id]
                             .component->setActive(request.state);
                     },
+                    [&](const YaPrefetchableSupport::GetPrefetchableSupport&
+                            request)
+                        -> YaPrefetchableSupport::GetPrefetchableSupport::
+                            Response {
+                                Steinberg::Vst::PrefetchableSupport
+                                    prefetchable;
+                                const tresult result =
+                                    object_instances[request.instance_id]
+                                        .prefetchable_support
+                                        ->getPrefetchableSupport(prefetchable);
+
+                                return YaPrefetchableSupport::
+                                    GetPrefetchableSupportResponse{
+                                        .result = result,
+                                        .prefetchable = prefetchable};
+                            },
                 });
         });
 

src/wine-host/bridges/vst3.h

@@ -162,6 +162,8 @@ struct InstanceInterfaces {
         note_expression_controller;
     Steinberg::FUnknownPtr<Steinberg::IPluginBase> plugin_base;
     Steinberg::FUnknownPtr<Steinberg::Vst::IUnitData> unit_data;
+    Steinberg::FUnknownPtr<Steinberg::Vst::IPrefetchableSupport>
+        prefetchable_support;
     Steinberg::FUnknownPtr<Steinberg::Vst::IProgramListData> program_list_data;
     Steinberg::FUnknownPtr<Steinberg::Vst::IUnitInfo> unit_info;
     Steinberg::FUnknownPtr<Steinberg::Vst::IXmlRepresentationController>