Add boilerplate for event handling

README.md

@@ -18,6 +18,7 @@ the following dependencies:
 
 - gcc (tested using GCC 9.2)
 - A Wine installation with `wiengcc` and the development headers.
+- [msgpack-c](git@github.com:msgpack/msgpack-c.git)
 
 The project can then be compiled as follows:
 

meson.build

@@ -2,7 +2,7 @@ project(
   'yabridge',
   'cpp',
   version : '0.1',
-  default_options : ['warning_level=3', 'cpp_std=c++17']
+  default_options : ['warning_level=3', 'cpp_std=c++17', 'build.cpp_std=c++17']
 )
 
 # Meson does not let us set a default cross compiler, which makes sense, but it
@@ -20,6 +20,8 @@ endif
 # about the way these two components work together can be found in the readme
 # file.
 
+msgpack_dep = dependency('msgpack')
+
 include_dir = include_directories('src/include')
 
 common_src = []
@@ -38,7 +40,7 @@ shared_library(
   linux_plugin_src + common_src,
   native : true,
   include_directories : include_dir,
-  dependencies : [],
+  dependencies : [msgpack_dep],
   link_args : []
 )
 

src/include/vestige/aeffect.h

@@ -24,7 +24,7 @@
 
 #pragma once
 
-#include <stdint.h>
+#include <cinttypes>
 
 // Calling convention
 #ifndef __WINE__

src/plugin/bridge.cpp

@@ -1,6 +1,9 @@
 #include "bridge.h"
 
 #include <iostream>
+#include <msgpack.hpp>
+
+#include "../common/events.h"
 
 // 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*
@@ -12,10 +15,24 @@
  */
 intptr_t Bridge::dispatch(AEffect* /*plugin*/,
                           int32_t opcode,
-                          int32_t /*parameter*/,
-                          intptr_t /*value*/,
+                          int32_t parameter,
+                          intptr_t value,
                           void* result,
-                          float /*option*/) {
+                          float option) {
+    // TODO: Send to the Wine process
+    Event event{opcode, parameter, value, option};
+    msgpack::sbuffer buffer;
+    msgpack::pack(buffer, event);
+
+    // TODO: Read the response
+    EventResult response;
+    if (response.result) {
+        std::copy(response.result->begin(), response.result->end(),
+                  static_cast<char*>(result));
+    }
+
+    // Some events need some extra handling
+    // TODO: Handle other things such as GUI itneraction
     switch (opcode) {
         case effClose:
             // TODO: Gracefully close the editor?
@@ -27,17 +44,9 @@ intptr_t Bridge::dispatch(AEffect* /*plugin*/,
 
             return 0;
             break;
-        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;
+    return response.return_value;
 }
 
 void Bridge::process(AEffect* /*plugin*/,