Add a proxy class for IParameterFinder

meson.build

@@ -97,6 +97,7 @@ vst3_plugin_sources = [
   'src/common/communication/common.cpp',
   'src/common/logging/common.cpp',
   'src/common/logging/vst3.cpp',
+  'src/common/serialization/vst3/plug-view/parameter-finder.cpp',
   'src/common/serialization/vst3/plug-view/plug-view.cpp',
   'src/common/serialization/vst3/plug-frame/plug-frame.cpp',
   'src/common/serialization/vst3/plugin/audio-processor.cpp',
@@ -159,6 +160,7 @@ host_sources = [
 if with_vst3
   host_sources += [
     'src/common/logging/vst3.cpp',
+    'src/common/serialization/vst3/plug-view/parameter-finder.cpp',
     'src/common/serialization/vst3/plug-view/plug-view.cpp',
     'src/common/serialization/vst3/plug-frame/plug-frame.cpp',
     'src/common/serialization/vst3/plugin/audio-processor.cpp',

src/common/serialization/vst3/README.md

@@ -6,7 +6,7 @@ for more information on how the serialization works.
 
 The following interfaces are not yet implemented:
 
-- Every interface introduced after VST 3.0.1 with the exceptons of
+- Every interface introduced after VST 3.0.2 with the exceptons of
   `IEditController2` and `INoteExpressionController` which has already been
   implemented
 - The [Presonus extensions](https://presonussoftware.com/en_US/developer),
@@ -19,6 +19,7 @@ VST3 plugin interfaces are implemented as follows:
 | `YaPluginFactory`            |                     | `IPluginFactory`, `IPluginFactory2`, `IPluginFactory3` |
 | `Vst3ConnectionPointProxy`   |                     | `IConnectionPoint` through `YaConnectionPoint`         |
 | `Vst3PlugViewProxy`          |                     | All of the below:                                      |
+| `YaParameterFinder`          | `Vst3PlugViewProxy` | `IParameterFinder`                                     |
 | `YaPlugView`                 | `Vst3PlugViewProxy` | `IPlugView`                                            |
 | `Vst3PluginProxy`            |                     | All of the below:                                      |
 | `YaAudioProcessor`           | `Vst3PluginProxy`   | `IAudioProcessor`                                      |

src/common/serialization/vst3/plug-view/parameter-finder.cpp

@@ -0,0 +1,27 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020-2021 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 "parameter-finder.h"
+
+YaParameterFinder::ConstructArgs::ConstructArgs() {}
+
+YaParameterFinder::ConstructArgs::ConstructArgs(
+    Steinberg::IPtr<Steinberg::FUnknown> object)
+    : supported(
+          Steinberg::FUnknownPtr<Steinberg::Vst::IParameterFinder>(object)) {}
+
+YaParameterFinder::YaParameterFinder(const ConstructArgs&& args)
+    : arguments(std::move(args)) {}

src/common/serialization/vst3/plug-view/parameter-finder.h

@@ -0,0 +1,72 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020-2021 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 <pluginterfaces/vst/ivstplugview.h>
+
+#include "../base.h"
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
+
+/**
+ * Wraps around `IParameterFinder` for serialization purposes. This is
+ * instantiated as part of `Vst3ParameterFinderProxy`.
+ */
+class YaParameterFinder : public Steinberg::Vst::IParameterFinder {
+   public:
+    /**
+     * These are the arguments for creating a `YaParameterFinder`.
+     */
+    struct ConstructArgs {
+        ConstructArgs();
+
+        /**
+         * Check whether an existing implementation implements
+         * `IParameterFinder` and read arguments from it.
+         */
+        ConstructArgs(Steinberg::IPtr<Steinberg::FUnknown> object);
+
+        /**
+         * Whether the object supported this interface.
+         */
+        bool supported;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value1b(supported);
+        }
+    };
+
+    /**
+     * Instantiate this instance with arguments read from another interface
+     * implementation.
+     */
+    YaParameterFinder(const ConstructArgs&& args);
+
+    inline bool supported() const { return arguments.supported; }
+
+    virtual tresult PLUGIN_API
+    findParameter(int32 xPos,
+                  int32 yPos,
+                  Steinberg::Vst::ParamID& resultTag /*out*/) = 0;
+
+   protected:
+    ConstructArgs arguments;
+};
+
+#pragma GCC diagnostic pop

src/common/serialization/vst3/plug-view/plug-view.h

@@ -18,7 +18,6 @@
 
 #include <pluginterfaces/gui/iplugview.h>
 
-#include "../../common.h"
 #include "../base.h"
 #include "../plug-frame-proxy.h"