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