Delegate the plugin functionality to a class

This way we can hopefully contain all the manual memory management and
raw pointers somewhat.

src/plugin/bridge.cpp

@@ -0,0 +1,50 @@
+#include "bridge.h"
+
+#include <iostream>
+
+// TODO: I should track down the VST2 SDK for clarification on some of the
+//       implementation details, such as the use of intptr_t isntead of void*
+//       here.
+
+/**
+ * Handle an event sent by the VST host. Most of these opcodes will be passed
+ * through to the winelib VST host.
+ */
+intptr_t Bridge::dispatch(AEffect* /*plugin*/,
+                          int32_t opcode,
+                          int32_t /*parameter*/,
+                          intptr_t /*value*/,
+                          void* result,
+                          float /*option*/) {
+    switch (opcode) {
+        case effGetEffectName:
+            const std::string plugin_name("Hello, world!");
+            std::copy(plugin_name.begin(), plugin_name.end(),
+                      static_cast<char*>(result));
+
+            // return 1;  // TODO: Why?
+            break;
+    }
+
+    // TODO: Unimplmemented
+    return 0;
+}
+
+void Bridge::process(AEffect* /*plugin*/,
+                     float** /*inputs*/,
+                     float** /*outputs*/,
+                     int32_t /*sample_frames*/) {
+    // TODO: Unimplmemented
+}
+
+void Bridge::set_parameter(AEffect* /*plugin*/,
+                           int32_t /*index*/,
+                           float /*value*/) {
+    // TODO: Unimplmemented
+}
+
+float Bridge::get_parameter(AEffect* /*plugin*/, int32_t /*index*/
+) {
+    // TODO: Unimplmemented
+    return 0.0f;
+}