Initial VST3 Support (disabled)

Disabled until Steinberg licensing compliance  can be sorted out.

src/vst3/Vst3Effect.hpp

@@ -0,0 +1,83 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2022 Robin E. R. Davies
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include "PiPedalHost.hpp"
+#include <functional>
+#include "json.hpp"
+
+
+namespace pipedal {
+    struct Vst3PluginInfo {
+    public:
+
+        std::string filePath_;
+        std::string version_;
+        std::string uid_;
+
+        Lv2PluginUiInfo pluginInfo_;
+
+        DECLARE_JSON_MAP(Vst3PluginInfo);
+
+    };
+
+    struct  Vst3ProgramListEntry {
+        int32_t id;
+        std::string name;
+    };
+
+    struct Vst3ProgramList {
+        std::string name;
+
+        std::vector<Vst3ProgramListEntry> programs;
+        
+    };
+
+    class Vst3Effect: public IEffect {
+    public:
+        using Ptr = std::unique_ptr<Vst3Effect>;
+
+        virtual void Prepare(int32_t sampleRate, size_t maxBufferSize,int inputChannels, int outputChannels) = 0;
+
+        virtual void Activate() = 0;
+        virtual void Deactivate() = 0;
+        virtual void Unprepare() = 0;
+        virtual void CheckSync() = 0; // throw if audioProcessor and controller are not sync (test only)
+
+        virtual bool SupportsState() const = 0;
+        virtual bool GetState(std::vector<uint8_t> *state) = 0;
+
+		virtual void SetState(const std::vector<uint8_t> state) = 0;
+
+        using ControlChangedHandler = std::function<void(int control,float value)>;
+        virtual void SetControlChangedHandler(const ControlChangedHandler& handler) = 0;
+        virtual void RemoveControlChangedHandler() = 0;
+
+        virtual std::vector<Vst3ProgramList> GetProgramList(int32_t programListId) = 0;
+    public:
+        static std::unique_ptr<Vst3Effect> CreateInstance(uint64_t instanceId,const Vst3PluginInfo& info, IHost *pHost);
+    };
+
+}