Add missing const qualifiers to member functions

src/common/events.h

@@ -38,7 +38,7 @@ class DefaultDataConverter {
     virtual EventPayload read(const int /*opcode*/,
                               const int /*index*/,
                               const intptr_t /*value*/,
-                              const void* data) {
+                              const void* data) const {
         if (!data) {
             return nullptr;
         }
@@ -60,8 +60,9 @@ class DefaultDataConverter {
      * can be serialized and conveys the meaning of the event. This is only used
      * for the `effSetSpeakerArrangement` and `effGetSpeakerArrangement` events.
      */
-    virtual std::optional<EventPayload> read_value(const int /*opcode*/,
-                                                   const intptr_t /*value*/) {
+    virtual std::optional<EventPayload> read_value(
+        const int /*opcode*/,
+        const intptr_t /*value*/) const {
         return std::nullopt;
     }
 
@@ -70,7 +71,7 @@ class DefaultDataConverter {
      */
     virtual void write(const int /*opcode*/,
                        void* data,
-                       const EventResult& response) {
+                       const EventResult& response) const {
         // The default behavior is to handle this as a null terminated C-style
         // string
         std::visit(overload{[&](const auto&) {},
@@ -92,7 +93,7 @@ class DefaultDataConverter {
      */
     virtual void write_value(const int /*opcode*/,
                              intptr_t /*value*/,
-                             const EventResult& /*response*/) {}
+                             const EventResult& /*response*/) const {}
 
     /**
      * This function can override a callback's return value based on the opcode.
@@ -104,7 +105,7 @@ class DefaultDataConverter {
      *   function.
      */
     virtual intptr_t return_value(const int /*opcode*/,
-                                  const intptr_t original) {
+                                  const intptr_t original) const {
         return original;
     }
 };

src/common/logging.cpp

@@ -297,7 +297,7 @@ void Logger::log_event_response(
     }
 }
 
-bool Logger::should_filter_event(bool is_dispatch, int opcode) {
+bool Logger::should_filter_event(bool is_dispatch, int opcode) const {
     if (verbosity >= Verbosity::all_events) {
         return false;
     }

src/common/logging.h

@@ -118,7 +118,7 @@ class Logger {
      * Determine whether an event should be filtered based on the current
      * verbosity level.
      */
-    bool should_filter_event(bool is_dispatch, int opcode);
+    bool should_filter_event(bool is_dispatch, int opcode) const;
 
     /**
      * The output stream to write the log messages to. Typically either STDERR

src/plugin/plugin-bridge.cpp

@@ -187,7 +187,7 @@ class DispatchDataConverter : DefaultDataConverter {
     EventPayload read(const int opcode,
                       const int index,
                       const intptr_t value,
-                      const void* data) {
+                      const void* data) const override {
         // There are some events that need specific structs that we can't simply
         // serialize as a string because they might contain null bytes
         switch (opcode) {
@@ -262,8 +262,9 @@ class DispatchDataConverter : DefaultDataConverter {
         }
     }
 
-    std::optional<EventPayload> read_value(const int opcode,
-                                           const intptr_t value) {
+    std::optional<EventPayload> read_value(
+        const int opcode,
+        const intptr_t value) const override {
         switch (opcode) {
             case effSetSpeakerArrangement:
             case effGetSpeakerArrangement:
@@ -282,7 +283,9 @@ class DispatchDataConverter : DefaultDataConverter {
         }
     }
 
-    void write(const int opcode, void* data, const EventResult& response) {
+    void write(const int opcode,
+               void* data,
+               const EventResult& response) const override {
         switch (opcode) {
             case effOpen: {
                 // Update our `AEffect` object one last time for improperly
@@ -363,13 +366,14 @@ class DispatchDataConverter : DefaultDataConverter {
         }
     }
 
-    intptr_t return_value(const int opcode, const intptr_t original) {
+    intptr_t return_value(const int opcode,
+                          const intptr_t original) const override {
         return DefaultDataConverter::return_value(opcode, original);
     }
 
     void write_value(const int opcode,
                      intptr_t value,
-                     const EventResult& response) {
+                     const EventResult& response) const override {
         switch (opcode) {
             case effGetSpeakerArrangement: {
                 // Same as the above, but now for the input speaker

src/wine-host/bridges/group.h

@@ -116,7 +116,7 @@ class GroupBridge {
      *   STDOUT and STDERR streams of the current process will be redirected to
      *   a pipe so they can be properly written to a log file.
      */
-    GroupBridge(boost::filesystem::path group_socket_path);
+    explicit GroupBridge(boost::filesystem::path group_socket_path);
 
     ~GroupBridge();
 

src/wine-host/bridges/vst2.cpp

@@ -144,7 +144,7 @@ Vst2Bridge::Vst2Bridge(boost::asio::io_context& main_context,
         Win32Thread(handle_process_replacing_proxy, this);
 }
 
-bool Vst2Bridge::should_skip_message_loop() {
+bool Vst2Bridge::should_skip_message_loop() const {
     return std::holds_alternative<EditorOpening>(editor);
 }
 
@@ -417,7 +417,7 @@ class HostCallbackDataConverter : DefaultDataConverter {
     EventPayload read(const int opcode,
                       const int index,
                       const intptr_t value,
-                      const void* data) {
+                      const void* data) const override {
         switch (opcode) {
             case audioMasterGetTime:
                 return WantsVstTimeInfo{};
@@ -445,12 +445,15 @@ class HostCallbackDataConverter : DefaultDataConverter {
         }
     }
 
-    std::optional<EventPayload> read_value(const int opcode,
-                                           const intptr_t value) {
+    std::optional<EventPayload> read_value(
+        const int opcode,
+        const intptr_t value) const override {
         return DefaultDataConverter::read_value(opcode, value);
     }
 
-    void write(const int opcode, void* data, const EventResult& response) {
+    void write(const int opcode,
+               void* data,
+               const EventResult& response) const override {
         switch (opcode) {
             case audioMasterGetTime:
                 // Write the returned `VstTimeInfo` struct into a field and
@@ -470,7 +473,8 @@ class HostCallbackDataConverter : DefaultDataConverter {
         }
     }
 
-    intptr_t return_value(const int opcode, const intptr_t original) {
+    intptr_t return_value(const int opcode,
+                          const intptr_t original) const override {
         switch (opcode) {
             case audioMasterGetTime: {
                 // Return a pointer to the `VstTimeInfo` object written in
@@ -490,7 +494,7 @@ class HostCallbackDataConverter : DefaultDataConverter {
 
     void write_value(const int opcode,
                      intptr_t value,
-                     const EventResult& response) {
+                     const EventResult& response) const override {
         return DefaultDataConverter::write_value(opcode, value, response);
     }
 

src/wine-host/bridges/vst2.h

@@ -87,7 +87,7 @@ class Vst2Bridge {
      * individually hosted plugins this check is done implicitely in
      * `Vst2Bridge::handle_win32_events()`.
      */
-    bool should_skip_message_loop();
+    bool should_skip_message_loop() const;
 
     /**
      * Handle events until the plugin exits. The actual events are posted to
@@ -151,7 +151,7 @@ class Vst2Bridge {
    private:
     /**
      * A wrapper around `plugin->dispatcher` that handles the opening and
-     * closing of GUIs.
+     * closing of GUIs. Used inside of `handle_dispatch()`.
      */
     intptr_t dispatch_wrapper(AEffect* plugin,
                               int opcode,

src/wine-host/editor.cpp

@@ -139,7 +139,7 @@ void Editor::send_idle_event() {
     plugin->dispatcher(plugin, effEditIdle, 0, 0, nullptr, 0);
 }
 
-void Editor::handle_win32_events() {
+void Editor::handle_win32_events() const {
     MSG msg;
 
     // The null value for the second argument is needed to handle interaction
@@ -162,7 +162,7 @@ void Editor::handle_win32_events() {
     }
 }
 
-void Editor::handle_x11_events() {
+void Editor::handle_x11_events() const {
     // TODO: Initiating drag-and-drop in Serum _sometimes_ causes the GUI to
     //       update while dragging while other times it does not. From all the
     //       plugins I've tested this only happens in Serum though.
@@ -201,7 +201,7 @@ void Editor::handle_x11_events() {
     }
 }
 
-void Editor::fix_local_coordinates() {
+void Editor::fix_local_coordinates() const {
     // We're purposely not using XEmbed. This has the consequence that wine
     // still thinks that any X and Y coordinates are relative to the x11 window
     // root instead of the parent window provided by the DAW, causing all sorts

src/wine-host/editor.h

@@ -107,12 +107,12 @@ class Editor {
      * Must be run from the same thread the GUI was created in because of Win32
      * limitations.
      */
-    void handle_win32_events();
+    void handle_win32_events() const;
 
     /**
      * Handle X11 events sent to the window our editor is embedded in.
      */
-    void handle_x11_events();
+    void handle_x11_events() const;
 
    private:
     /**
@@ -120,7 +120,7 @@ class Editor {
      * reparenting without using XEmbed. See the comment at the top of the
      * implementation on why this is needed.
      */
-    void fix_local_coordinates();
+    void fix_local_coordinates() const;
 
     /**
      * A pointer to the currently active window. Will be a null pointer if no