Add Vst3PlugFrameProxy

For proxying the `IPlugFrame*` passed to `IPlugView::setFrame()`.

meson.build

@@ -93,6 +93,7 @@ vst3_plugin_sources = [
   'src/common/serialization/vst3/host-context-proxy.cpp',
   'src/common/serialization/vst3/param-value-queue.cpp',
   'src/common/serialization/vst3/parameter-changes.cpp',
+  'src/common/serialization/vst3/plug-frame-proxy.cpp',
   'src/common/serialization/vst3/plug-view-proxy.cpp',
   'src/common/serialization/vst3/plugin-proxy.cpp',
   'src/common/serialization/vst3/plugin-factory.cpp',
@@ -145,6 +146,7 @@ if with_vst3
     'src/common/serialization/vst3/host-context-proxy.cpp',
     'src/common/serialization/vst3/param-value-queue.cpp',
     'src/common/serialization/vst3/parameter-changes.cpp',
+    'src/common/serialization/vst3/plug-frame-proxy.cpp',
     'src/common/serialization/vst3/plug-view-proxy.cpp',
     'src/common/serialization/vst3/plugin-proxy.cpp',
     'src/common/serialization/vst3/plugin-factory.cpp',

src/common/serialization/vst3/component-handler-proxy.h

@@ -25,10 +25,10 @@
 /**
  * An abstract class that implements `IComponentHandler`, and optionally also
  * all other VST3 interfaces an object passed to
- * `IEditController::setComponentHandler()`. This works exactly the same as
+ * `IEditController::setComponentHandler()` might implement. This works exactly
- * `Vst3PluginProxy`, but instead of proxying for an object provided by the
+ * the same as `Vst3PluginProxy`, but instead of proxying for an object provided
- * plugin we are proxying for the `IComponentHandler*` argument passed to plugin
+ * by the plugin we are proxying for the `IComponentHandler*` argument passed to
- * by the host.
+ * plugin by the host.
  */
 class Vst3ComponentHandlerProxy : public YaComponentHandler {
    public:

src/common/serialization/vst3/plug-frame-proxy.cpp

@@ -0,0 +1,50 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020  Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "plug-frame-proxy.h"
+
+Vst3PlugFrameProxy::ConstructArgs::ConstructArgs() {}
+
+Vst3PlugFrameProxy::ConstructArgs::ConstructArgs(
+    Steinberg::IPtr<Steinberg::FUnknown> object,
+    size_t owner_instance_id)
+    : owner_instance_id(owner_instance_id), plug_frame_args(object) {}
+
+Vst3PlugFrameProxy::Vst3PlugFrameProxy(const ConstructArgs&& args)
+    : YaPlugFrame(std::move(args.plug_frame_args)),
+      arguments(std::move(args)){FUNKNOWN_CTOR}
+
+      Vst3PlugFrameProxy::~Vst3PlugFrameProxy() {
+    FUNKNOWN_DTOR
+}
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdelete-non-virtual-dtor"
+IMPLEMENT_REFCOUNT(Vst3PlugFrameProxy)
+#pragma GCC diagnostic pop
+
+tresult PLUGIN_API Vst3PlugFrameProxy::queryInterface(Steinberg::FIDString _iid,
+                                                      void** obj) {
+    if (YaPlugFrame::supported()) {
+        QUERY_INTERFACE(_iid, obj, Steinberg::FUnknown::iid,
+                        Steinberg::IPlugFrame)
+        QUERY_INTERFACE(_iid, obj, Steinberg::IPlugFrame::iid,
+                        Steinberg::IPlugFrame)
+    }
+
+    *obj = nullptr;
+    return Steinberg::kNoInterface;
+}

src/common/serialization/vst3/plug-frame-proxy.h

@@ -0,0 +1,97 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020  Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include "../common.h"
+#include "plug-frame/plug-frame.h"
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
+
+/**
+ * An abstract class that implements `IPlugFrame`, and optionally also all other
+ * VST3 interfaces an object passed to `IPlugView::setFrame()` might implement.
+ * This works exactly the same as `Vst3PluginProxy`, but instead of proxying for
+ * an object provided by the plugin we are proxying for the `IPlugFrame*`
+ * argument passed to plugin by the host.
+ */
+class Vst3PlugFrameProxy : public YaPlugFrame {
+   public:
+    /**
+     * These are the arguments for constructing a
+     * `Vst3PlugFrameProxyImpl`.
+     */
+    struct ConstructArgs {
+        ConstructArgs();
+
+        /**
+         * Read from an existing object. We will try to mimic this object, so
+         * we'll support any interfaces this object also supports.
+         */
+        ConstructArgs(Steinberg::IPtr<FUnknown> object,
+                      size_t owner_instance_id);
+
+        /**
+         * The unique instance identifier of the proxy object instance this
+         * component handler has been passed to and thus belongs to. This way we
+         * can refer to the correct 'actual' `IPlugFrame` instance when the
+         * plugin does a callback.
+         */
+        native_size_t owner_instance_id;
+
+        YaPlugFrame::ConstructArgs plug_frame_args;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(owner_instance_id);
+            s.object(plug_frame_args);
+        }
+    };
+
+    /**
+     * Instantiate this instance with arguments read from an actual component
+     * handler.
+     *
+     * @note Since this is passed as part of `IEditController::setPlugFrame()`,
+     *   there are no direct `Construct` or `Destruct` messages. This object's
+     *   lifetime is bound to that of the objects they are passed to. If the
+     *   plug view instance gets dropped, this proxy should also be dropped.
+     */
+    Vst3PlugFrameProxy(const ConstructArgs&& args);
+
+    /**
+     * The lifetime of this object should be bound to the object we created it
+     * for. When the `Vst3PlugViewProxy` for the object with instance with id
+     * `n` gets dropped, the corresponding `Vst3PlugFrameProxy` should also be
+     * dropped.
+     */
+    virtual ~Vst3PlugFrameProxy();
+
+    DECLARE_FUNKNOWN_METHODS
+
+    /**
+     * Get the instance ID of the owner of this object.
+     */
+    inline size_t owner_instance_id() const {
+        return arguments.owner_instance_id;
+    }
+
+   private:
+    ConstructArgs arguments;
+};
+
+#pragma GCC diagnostic pop