Implement IComponent::setState()

src/common/logging/vst3.cpp

@@ -133,6 +133,15 @@ void Vst3Logger::log_request(bool is_host_vst,
     });
 }
 
+void Vst3Logger::log_request(bool is_host_vst,
+                             const YaComponent::SetState& request) {
+    log_request_base(is_host_vst, [&](auto& message) {
+        message << "<IComponent* #" << request.instance_id
+                << ">::setState(state = <IBStream* containing "
+                << request.state.size() << "bytes>)";
+    });
+}
+
 void Vst3Logger::log_request(bool is_host_vst,
                              const YaPluginFactory::Construct&) {
     log_request_base(is_host_vst,

src/common/logging/vst3.h

@@ -66,6 +66,7 @@ class Vst3Logger {
     void log_request(bool is_host_vst, const YaComponent::GetRoutingInfo&);
     void log_request(bool is_host_vst, const YaComponent::ActivateBus&);
     void log_request(bool is_host_vst, const YaComponent::SetActive&);
+    void log_request(bool is_host_vst, const YaComponent::SetState&);
     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&);

src/common/serialization/vst3.h

@@ -67,6 +67,7 @@ using ControlRequest = std::variant<YaComponent::Construct,
                                     YaComponent::GetRoutingInfo,
                                     YaComponent::ActivateBus,
                                     YaComponent::SetActive,
+                                    YaComponent::SetState,
                                     YaPluginFactory::Construct,
                                     YaPluginFactory::SetHostContext>;
 

src/common/serialization/vst3/base.cpp

@@ -175,6 +175,10 @@ tresult PLUGIN_API VectorStream::queryInterface(Steinberg::FIDString _iid,
     return Steinberg::kNoInterface;
 }
 
+size_t VectorStream::size() const {
+    return buffer.size();
+}
+
 tresult PLUGIN_API VectorStream::read(void* buffer,
                                       int32 numBytes,
                                       int32* numBytesRead) {

src/common/serialization/vst3/base.h

@@ -134,6 +134,11 @@ class VectorStream : public Steinberg::IBStream,
 
     DECLARE_FUNKNOWN_METHODS
 
+    /**
+     * Return the buffer's, used in the logging messages.
+     */
+    size_t size() const;
+
     // From `IBstream`
     tresult PLUGIN_API read(void* buffer,
                             int32 numBytes,

src/common/serialization/vst3/component.h

@@ -350,6 +350,25 @@ class YaComponent : public Steinberg::Vst::IComponent {
     };
 
     virtual tresult PLUGIN_API setActive(TBool state) override = 0;
+
+    /**
+     * Message to pass through a call to `IComponent::setState(state)` to the
+     * Wine plugin host.
+     */
+    struct SetState {
+        using Response = UniversalTResult;
+
+        native_size_t instance_id;
+
+        VectorStream state;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(instance_id);
+            s.object(state);
+        }
+    };
+
     virtual tresult PLUGIN_API
     setState(Steinberg::IBStream* state) override = 0;
     virtual tresult PLUGIN_API

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

@@ -141,9 +141,10 @@ tresult PLUGIN_API YaComponentPluginImpl::setActive(TBool state) {
 }
 
 tresult PLUGIN_API YaComponentPluginImpl::setState(Steinberg::IBStream* state) {
-    // TODO: Implement
-    bridge.logger.log("TODO: IComponent::setState()");
-    return Steinberg::kNotImplemented;
+    return bridge
+        .send_message(YaComponent::SetState{
+            .instance_id = arguments.instance_id, .state = state})
+        .native();
 }
 
 tresult PLUGIN_API YaComponentPluginImpl::getState(Steinberg::IBStream* state) {

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

@@ -30,6 +30,11 @@ YaPluginFactoryPluginImpl::createInstance(Steinberg::FIDString cid,
                                           Steinberg::FIDString _iid,
                                           void** obj) {
     // TODO: Do the same thing for other types
+
+    // These arw pointers are scary. The idea here is that we return a newly
+    // initialized object (that initializes itself with a reference count of 1),
+    // and then the receiving side will use `Steinberg::owned()` to adopt it to
+    // an `IPtr<T>`.
     ArrayUID cid_array;
     std::copy(cid, cid + sizeof(Steinberg::TUID), cid_array.begin());
     if (Steinberg::FIDStringsEqual(_iid, Steinberg::Vst::IComponent::iid)) {
@@ -38,8 +43,8 @@ YaPluginFactoryPluginImpl::createInstance(Steinberg::FIDString cid,
         return std::visit(
             overload{
                 [&](YaComponent::ConstructArgs&& args) -> tresult {
-                    // I find all of these raw pointers scary
-                    *obj = new YaComponentPluginImpl(bridge, std::move(args));
+                    *obj = static_cast<Steinberg::Vst::IComponent*>(
+                        new YaComponentPluginImpl(bridge, std::move(args)));
                     return Steinberg::kResultOk;
                 },
                 [&](const UniversalTResult& code) { return code.native(); }},

src/wine-host/bridges/vst2.cpp

@@ -441,7 +441,7 @@ class HostCallbackDataConverter : DefaultDataConverter {
         switch (opcode) {
             case audioMasterGetTime:
                 // Write the returned `VstTimeInfo` struct into a field and
-                // make the function return a poitner to it in the function
+                // make the function return a pointer to it in the function
                 // below. Depending on whether the host supported the
                 // requested time information this operations returns either
                 // a null pointer or a pointer to a `VstTimeInfo` object.

src/wine-host/bridges/vst3.cpp

@@ -153,6 +153,11 @@ void Vst3Bridge::run() {
                 return component_instances[request.instance_id]
                     .component->setActive(request.state);
             },
+            [&](YaComponent::SetState& request)
+                -> YaComponent::SetState::Response {
+                return component_instances[request.instance_id]
+                    .component->setState(&request.state);
+            },
             [&](const YaPluginFactory::Construct&)
                 -> YaPluginFactory::Construct::Response {
                 return YaPluginFactory::ConstructArgs(