Implement IParameterChanges

src/common/serialization/vst3/parameter-changes.h

@@ -0,0 +1,68 @@
+// 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 <pluginterfaces/vst/ivstparameterchanges.h>
+
+#include "base.h"
+#include "param-value-queue.h"
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
+
+/**
+ * Wraps around `IParameterChanges` for serialization purposes. Used in
+ * `YaProcessData`.
+ */
+class YaParameterChanges : public Steinberg::Vst::IParameterChanges {
+   public:
+    /**
+     * Default constructor with an empty parameter changes list. The plugin can
+     * use this to output data.
+     */
+    YaParameterChanges();
+
+    /**
+     * Read data from an existing `IParameterChanges` object.
+     */
+    YaParameterChanges(Steinberg::Vst::IParameterChanges& original_queues);
+
+    ~YaParameterChanges();
+
+    DECLARE_FUNKNOWN_METHODS
+
+    // From `IParameterChanges`
+    int32 PLUGIN_API getParameterCount() override;
+    Steinberg::Vst::IParamValueQueue* PLUGIN_API
+    getParameterData(int32 index) override;
+    Steinberg::Vst::IParamValueQueue* PLUGIN_API
+    addParameterData(const Steinberg::Vst::ParamID& id,
+                     int32& index /*out*/) override;
+
+    template <typename S>
+    void serialize(S& s) {
+        s.container(queues, 1 << 16);
+    }
+
+   private:
+    /**
+     * The parameter value changes queues.
+     */
+    std::vector<YaParamValueQueue> queues;
+};
+
+#pragma GCC diagnostic pop