Implement IComponent::GetBusInfo()

src/common/logging/vst3.cpp

@@ -88,6 +88,15 @@ void Vst3Logger::log_request(bool is_host_vst,
     });
 }
 
+void Vst3Logger::log_request(bool is_host_vst,
+                             const YaComponent::GetBusInfo& request) {
+    log_request_base(is_host_vst, [&](auto& message) {
+        message << "<IComponent* #" << request.instance_id << ">::getBusInfo("
+                << request.type << ", " << request.dir << ", " << request.index
+                << ", &bus)";
+    });
+}
+
 void Vst3Logger::log_request(bool is_host_vst,
                              const YaPluginFactory::Construct&) {
     log_request_base(is_host_vst,
@@ -126,6 +135,16 @@ void Vst3Logger::log_response(
     });
 }
 
+void Vst3Logger::log_response(bool is_host_vst,
+                              const YaComponent::GetBusInfoResponse& response) {
+    log_response_base(is_host_vst, [&](auto& message) {
+        message << response.result.string();
+        if (response.result.native() == Steinberg::kResultOk) {
+            message << ", <BusInfo>";
+        }
+    });
+}
+
 void Vst3Logger::log_response(bool is_host_vst,
                               const YaPluginFactory::ConstructArgs& args) {
     log_response_base(is_host_vst, [&](auto& message) {

src/common/logging/vst3.h

@@ -62,6 +62,7 @@ class Vst3Logger {
     void log_request(bool is_host_vst, const YaComponent::Terminate&);
     void log_request(bool is_host_vst, const YaComponent::SetIoMode&);
     void log_request(bool is_host_vst, const YaComponent::GetBusCount&);
+    void log_request(bool is_host_vst, const YaComponent::GetBusInfo&);
     void log_request(bool is_host_vst, const YaPluginFactory::Construct&);
     void log_request(bool is_host_vst, const YaPluginFactory::SetHostContext&);
     void log_request(bool is_host_vst, const WantsConfiguration&);
@@ -70,6 +71,7 @@ class Vst3Logger {
     void log_response(
         bool is_host_vst,
         const std::variant<YaComponent::ConstructArgs, UniversalTResult>&);
+    void log_response(bool is_host_vst, const YaComponent::GetBusInfoResponse&);
     void log_response(bool is_host_vst, const YaPluginFactory::ConstructArgs&);
     void log_response(bool is_host_vst, const Configuration&);
 

src/common/serialization/vst3.h

@@ -63,6 +63,7 @@ using ControlRequest = std::variant<YaComponent::Construct,
                                     YaComponent::Terminate,
                                     YaComponent::SetIoMode,
                                     YaComponent::GetBusCount,
+                                    YaComponent::GetBusInfo,
                                     YaPluginFactory::Construct,
                                     YaPluginFactory::SetHostContext>;
 

src/common/serialization/vst3/component.h

@@ -216,6 +216,45 @@ class YaComponent : public Steinberg::Vst::IComponent {
     virtual int32 PLUGIN_API
     getBusCount(Steinberg::Vst::MediaType type,
                 Steinberg::Vst::BusDirection dir) override = 0;
+
+    /**
+     * The response code and returned bus information for a call to
+     * `IComponent::getBusInfo(type, dir, index, bus <out>)`.
+     */
+    struct GetBusInfoResponse {
+        UniversalTResult result;
+        Steinberg::Vst::BusInfo updated_bus;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.object(result);
+            s.object(updated_bus);
+        }
+    };
+
+    /**
+     * Message to pass through a call to `IComponent::getBusInfo(type, dir,
+     * index, bus <out>)` to the Wine plugin host.
+     */
+    struct GetBusInfo {
+        using Response = GetBusInfoResponse;
+
+        native_size_t instance_id;
+
+        Steinberg::Vst::BusType type;
+        Steinberg::Vst::BusDirection dir;
+        int32 index;
+        Steinberg::Vst::BusInfo bus;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(instance_id);
+            s.value4b(type);
+            s.value4b(dir);
+            s.object(bus);
+        }
+    };
+
     virtual tresult PLUGIN_API
     getBusInfo(Steinberg::Vst::MediaType type,
                Steinberg::Vst::BusDirection dir,
@@ -246,3 +285,17 @@ void serialize(
     std::variant<YaComponent::ConstructArgs, UniversalTResult>& result) {
     s.ext(result, bitsery::ext::StdVariant{});
 }
+
+namespace Steinberg {
+namespace Vst {
+template <typename S>
+void serialize(S& s, Steinberg::Vst::BusInfo& info) {
+    s.value4b(info.mediaType);
+    s.value4b(info.direction);
+    s.value4b(info.channelCount);
+    s.container2b(info.name);
+    s.value4b(info.busType);
+    s.value4b(info.flags);
+}
+}  // namespace Vst
+}  // namespace Steinberg

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

@@ -94,8 +94,15 @@ YaComponentPluginImpl::getBusInfo(Steinberg::Vst::MediaType type,
                                   Steinberg::Vst::BusDirection dir,
                                   int32 index,
                                   Steinberg::Vst::BusInfo& bus /*out*/) {
-    // TODO: Implement
+    const GetBusInfoResponse response = bridge.send_message(
-    return Steinberg::kNotImplemented;
+        YaComponent::GetBusInfo{.instance_id = arguments.instance_id,
+                                .type = type,
+                                .dir = dir,
+                                .index = index,
+                                .bus = bus});
+
+    bus = response.updated_bus;
+    return response.result.native();
 }
 
 tresult PLUGIN_API YaComponentPluginImpl::getRoutingInfo(

src/wine-host/bridges/vst3.cpp

@@ -117,6 +117,15 @@ void Vst3Bridge::run() {
                 return component_instances[request.instance_id]->getBusCount(
                     request.type, request.dir);
             },
+            [&](YaComponent::GetBusInfo& request)
+                -> YaComponent::GetBusInfo::Response {
+                const tresult result =
+                    component_instances[request.instance_id]->getBusInfo(
+                        request.type, request.dir, request.index, request.bus);
+
+                return YaComponent::GetBusInfoResponse{
+                    .result = result, .updated_bus = request.bus};
+            },
             [&](const YaPluginFactory::Construct&)
                 -> YaPluginFactory::Construct::Response {
                 return YaPluginFactory::ConstructArgs(