Connect to the unix socket from the Wine VST host

meson.build

@@ -23,6 +23,8 @@ endif
 boost_dep = dependency('boost', modules : ['filesystem'])
 msgpack_dep = dependency('msgpack')
 threads_dep = dependency('threads')
+# The built in threads dependency does not know how to handle winegcc
+wine_threads_dep = declare_dependency(link_args : '-lpthread')
 
 include_dir = include_directories('src/include')
 
@@ -45,6 +47,6 @@ executable(
   ],
   native : false,
   include_directories : include_dir,
-  dependencies : [msgpack_dep],
+  dependencies : [boost_dep, msgpack_dep, wine_threads_dep],
   link_args : []
 )

src/plugin/bridge.cpp

@@ -55,6 +55,7 @@ bp::environment set_wineprefix();
 Bridge::Bridge()
     : io_context(),
       socket_endpoint(generate_endpoint_name().string()),
+      socket_acceptor(io_context, socket_endpoint),
       host_vst_dispatch(io_context),
       vst_stdin(),
       vst_stdout(),
@@ -66,12 +67,9 @@ Bridge::Bridge()
                bp::std_in = vst_stdin,
                bp::std_out = vst_stdout,
                bp::env = set_wineprefix()) {
-    boost::asio::local::stream_protocol::acceptor acceptor(io_context,
-                                                           socket_endpoint);
-
     // It's very important that these sockets are connected to in the same order
     // in the Wine VST host
-    acceptor.accept(host_vst_dispatch);
+    socket_acceptor.accept(host_vst_dispatch);
 }
 
 /**
@@ -187,7 +185,8 @@ fs::path find_vst_plugin() {
             "VST plugin .dll file.");
     }
 
-    return plugin_path;
+    // Also resolve symlinks here, mostly for development purposes
+    return fs::canonical(plugin_path);
 }
 
 /**

src/plugin/bridge.h

@@ -64,6 +64,7 @@ class Bridge {
    private:
     boost::asio::io_context io_context;
     boost::asio::local::stream_protocol::endpoint socket_endpoint;
+    boost::asio::local::stream_protocol::acceptor socket_acceptor;
 
     // The naming convention for these sockets is `<from>_<to>_<event>`. For
     // instance the socket named `host_vst_dispatch` forwards

src/wine-host/native-includes.h

@@ -34,6 +34,8 @@
 #undef __WIN32__
 #undef _WIN64
 
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/local/stream_protocol.hpp>
 #include <msgpack.hpp>
 
 #pragma pop_macro("WIN32")

src/wine-host/vst-host.cpp

@@ -65,7 +65,23 @@ int main(int argc, char* argv[]) {
 
     std::string plugin_title(buffer.data());
 
-    // TODO: The program should terminate automatically when stdin gets closed
+    // Connect to the sockets for communication once the plugin has finished
+    // loading
+    // TODO: The program should terminate gracefully when one of the sockets
+    //       gets closed
+    // TODO: Remove debug and move most of these things to
+    //       `wine-host/bridge.cpp`, similar to `plugin/bridge.cpp`
+
+    boost::asio::io_context io_context;
+    boost::asio::local::stream_protocol::endpoint socket_endpoint(
+        socket_endpoint_path);
+
+    // The naming convention for these sockets is `<from>_<to>_<event>`. For
+    // instance the socket named `host_vst_dispatch` forwards
+    // `AEffect.dispatch()` calls from the native VST host to the Windows VST
+    // plugin (through the Wine VST host).
+    boost::asio::local::stream_protocol::socket host_vst_dispatch(io_context);
+    host_vst_dispatch.connect(socket_endpoint);
 
     // TODO: Remove debug, we're just reporting the plugin's name we retrieved
     //       above