Add a proxy class for IProcessContextRequirements

meson.build

@@ -140,6 +140,7 @@ vst3_plugin_sources = [
   'src/common/serialization/vst3/plugin/note-expression-physical-ui-mapping.cpp',
   'src/common/serialization/vst3/plugin/plugin-base.cpp',
   'src/common/serialization/vst3/plugin/prefetchable-support.cpp',
+  'src/common/serialization/vst3/plugin/process-context-requirements.cpp',
   'src/common/serialization/vst3/plugin/program-list-data.cpp',
   'src/common/serialization/vst3/plugin/unit-data.cpp',
   'src/common/serialization/vst3/plugin/unit-info.cpp',
@@ -224,6 +225,7 @@ if with_vst3
     'src/common/serialization/vst3/plugin/note-expression-physical-ui-mapping.cpp',
     'src/common/serialization/vst3/plugin/plugin-base.cpp',
     'src/common/serialization/vst3/plugin/prefetchable-support.cpp',
+    'src/common/serialization/vst3/plugin/process-context-requirements.cpp',
     'src/common/serialization/vst3/plugin/program-list-data.cpp',
     'src/common/serialization/vst3/plugin/unit-data.cpp',
     'src/common/serialization/vst3/plugin/unit-info.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:
 
-- Interfaces introduced after VST 3.6.12
+- The last few VST 3.7.0 interfaces
 - The [Presonus extensions](https://presonussoftware.com/en_US/developer),
   although most of these things seem to overlap with newer VST3 interfaces
 
@@ -36,6 +36,7 @@ VST3 plugin interfaces are implemented as follows:
 | `YaNoteExpressionController`        | `Vst3PluginProxy`   | `INoteExpressionController`                            |
 | `YaNoteExpressionPhysicalUIMapping` | `Vst3PluginProxy`   | `INoteExpressionPhysicalUIMapping`                     |
 | `YaPluginBase`                      | `Vst3PluginProxy`   | `IPluginBase`                                          |
+| `YaProcessContextRequirements`      | `Vst3PluginProxy`   | `IProcessContextRequirements`                          |
 | `YaPrefetchableSupport`             | `Vst3PluginProxy`   | `IPrefetchableSupport`                                 |
 | `YaProgramListData`                 | `Vst3PluginProxy`   | `IProgramListData`                                     |
 | `YaUnitData`                        | `Vst3PluginProxy`   | `IUnitData`                                            |

src/common/serialization/vst3/plugin/process-context-requirements.cpp

@@ -0,0 +1,29 @@
+// 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 "process-context-requirements.h"
+
+YaProcessContextRequirements::ConstructArgs::ConstructArgs() {}
+
+YaProcessContextRequirements::ConstructArgs::ConstructArgs(
+    Steinberg::IPtr<Steinberg::FUnknown> object)
+    : supported(
+          Steinberg::FUnknownPtr<Steinberg::Vst::IProcessContextRequirements>(
+              object)) {}
+
+YaProcessContextRequirements::YaProcessContextRequirements(
+    const ConstructArgs&& args)
+    : arguments(std::move(args)) {}

src/common/serialization/vst3/plugin/process-context-requirements.h

@@ -0,0 +1,73 @@
+// 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/ivstaudioprocessor.h>
+
+#include "../../common.h"
+#include "../base.h"
+#include "../host-context-proxy.h"
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
+
+/**
+ * Wraps around `IProcessContextRequirements` for serialization purposes. Both
+ * components and edit controllers inherit from this. This is instantiated as
+ * part of `Vst3PluginProxy`.
+ */
+class YaProcessContextRequirements
+    : public Steinberg::Vst::IProcessContextRequirements {
+   public:
+    /**
+     * These are the arguments for creating a `YaProcessContextRequirements`.
+     */
+    struct ConstructArgs {
+        ConstructArgs();
+
+        /**
+         * Check whether an existing implementation implements
+         * `IProcessContextRequirements` 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.
+     */
+    YaProcessContextRequirements(const ConstructArgs&& args);
+
+    inline bool supported() const { return arguments.supported; }
+
+    virtual uint32 PLUGIN_API getProcessContextRequirements() override = 0;
+
+   protected:
+    ConstructArgs arguments;
+};
+
+#pragma GCC diagnostic pop