Rename plugin.cpp to vst2-plugin.cpp

src/plugin/vst2-plugin.cpp

@@ -0,0 +1,62 @@
+// 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 <vestige/aeffectx.h>
+
+#include <iostream>
+#include <memory>
+
+#include "../common/logging.h"
+#include "bridges/vst2.h"
+
+#define VST_EXPORT __attribute__((visibility("default")))
+
+// The main entry point for VST2 plugins should be called `VSTPluginMain``. The
+// other one exist for legacy reasons since some old hosts might still use them.
+// There's also another possible legacy entry point just called `main`, but GCC
+// will refuse to compile a function called `main` that's not a regular C++ main
+// function.
+
+/**
+ * The main VST2 plugin entry point. We first set up a bridge that connects to a
+ * Wine process that hosts the Windows VST2 plugin. We then create and return a
+ * VST plugin struct that acts as a passthrough to the bridge.
+ *
+ * To keep this somewhat contained this is the only place where we're doing
+ * manual memory management. Clean up is done when we receive the `effClose`
+ * opcode from the VST2 host (i.e. opcode 1).`
+ */
+extern "C" VST_EXPORT AEffect* VSTPluginMain(
+    audioMasterCallback host_callback) {
+    try {
+        // This is the only place where we have to use manual memory management.
+        // The bridge's destructor is called when the `effClose` opcode is
+        // received.
+        Vst2PluginBridge* bridge = new Vst2PluginBridge(host_callback);
+
+        return &bridge->plugin;
+    } catch (const std::exception& error) {
+        Logger logger = Logger::create_from_environment();
+        logger.log("Error during initialization:");
+        logger.log(error.what());
+
+        return nullptr;
+    }
+}
+
+extern "C" VST_EXPORT AEffect* main_plugin(audioMasterCallback audioMaster) {
+    return VSTPluginMain(audioMaster);
+}