Add some more boilerplate

src/plugin/yabridge.cpp

@@ -1,20 +1,14 @@
 #include <vestige/aeffect.h>
 
-extern "C" {
-// TODO: Remove
-#include <cstdio>
+#include <iostream>
 
 #define VST_EXPORT __attribute__((visibility("default")))
 
-/**
- * The main VST plugin entry point. All other functions exported below are
- * fallbacks for old VST hosts.
- */
-VST_EXPORT AEffect* VSTPluginMain(audioMasterCallback audioMaster) {
-    // TODO
-    printf("Hello, world!\n");
-    return nullptr;
-}
+// The main entry point for VST plugins should be called `VSTPluginMain``. The
+// other two exist for legacy reasons since some old hosts might still use
+// them.`
+extern "C" {
+extern VST_EXPORT AEffect* VSTPluginMain(audioMasterCallback);
 
 VST_EXPORT AEffect* MAIN(audioMasterCallback audioMaster) {
     return VSTPluginMain(audioMaster);
@@ -24,3 +18,72 @@ VST_EXPORT AEffect* main_plugin(audioMasterCallback audioMaster) {
     return VSTPluginMain(audioMaster);
 }
 }
+
+intptr_t dispatch(AEffect*, int32_t, int32_t, intptr_t, void*, float);
+void process(AEffect*, float**, float**, int32_t);
+void setParameter(AEffect*, int32_t, float);
+float getParameter(AEffect*, int32_t);
+
+/**
+ * The main VST plugin entry point. This finds the Windows VST plugin that
+ * should be run, executes it in our VST host inside Wine, and sets up
+ * communication between the two processes.
+ */
+VST_EXPORT AEffect* VSTPluginMain(audioMasterCallback /*audioMaster*/) {
+    // TODO: Do something useful ehre
+    std::cout << "Hello, world!" << std::endl;
+
+    AEffect* effect = new AEffect();
+    effect->magic = kEffectMagic;
+    effect->dispatcher = dispatch;
+    effect->process = process;
+    // XXX: processReplacing?
+    effect->setParameter = setParameter;
+    effect->getParameter = getParameter;
+    effect->numParams = 69;
+    effect->uniqueID = 69420;
+
+    return effect;
+}
+
+// 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.
+ *
+ * TODO: Look up what the return value here is actually doing.
+ */
+intptr_t dispatch(AEffect* /*effect*/,
+                  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 process(AEffect*, float**, float**, int32_t) {
+    // TODO: Unimplmemented
+}
+
+void setParameter(AEffect*, int32_t, float) {
+    // TODO: Unimplmemented
+}
+
+float getParameter(AEffect*, int32_t) {
+    // TODO: Unimplmemented
+    return 0.0f;
+}