[lv2] Quick fix for allowing calf plug-ins to run

They want to have the connections made before showing the ui

Fixes #1319

src/app/main.cpp

@@ -83,6 +83,22 @@ static void setup_x11()
 #endif
 }
 
+static void setup_suil()
+{
+#if defined(__linux__)
+  enum SuilArg { SUIL_ARG_NONE };
+  using suil_init_t = void (*)(int* argc, char*** argv, SuilArg key, ...);
+
+  if(auto lib = dlopen("libsuil-0.so.0", RTLD_LAZY | RTLD_LOCAL))
+  if(auto sym = reinterpret_cast<suil_init_t>(dlsym(lib, "suil_init")))
+  {
+    static int argc{0};
+    static char** argv{nullptr};
+    sym(&argc, &argv, SUIL_ARG_NONE);
+  }
+#endif
+}
+
 static void setup_gdk()
 {
 #if defined(__linux__)
@@ -311,6 +327,7 @@ int main(int argc, char** argv)
 #endif
 
   setup_limits();
+  setup_suil();
   setup_x11();
   setup_gdk();
   disable_denormals();

src/plugins/score-plugin-lv2/LV2/ApplicationPlugin.cpp

@@ -73,10 +73,6 @@ ApplicationPlugin::ApplicationPlugin(const score::ApplicationContext& app)
           lv2_context->features(),
           lilv}
 {
-  static int argc{0};
-  static char** argv{nullptr};
-  suil_init(&argc, &argv, SUIL_ARG_NONE);
-
   if (qEnvironmentVariableIsEmpty("SCORE_DISABLE_AUDIOPLUGINS"))
     if (qEnvironmentVariableIsEmpty("SCORE_DISABLE_LV2"))
       lv2_context->loadPlugins();

src/plugins/score-plugin-lv2/LV2/EffectModel.cpp

@@ -317,17 +317,16 @@ void Model::readPlugin()
   auto& app_plug
       = score::AppComponents().applicationPlugin<LV2::ApplicationPlugin>();
   auto& h = app_plug.lv2_host_context;
-  ossia::float_vector fInControls, fOutControls, fParamMin, fParamMax,
-      fParamInit, fOtherControls;
+  ossia::float_vector fParamMin, fParamMax, fParamInit, fOtherControls;
 
   LV2Data data{h, effectContext};
 
   const std::size_t audio_in_size = data.audio_in_ports.size();
   const std::size_t audio_out_size = data.audio_out_ports.size();
-  /*
+
   const std::size_t in_size = data.control_in_ports.size();
   const std::size_t out_size = data.control_out_ports.size();
-  const std::size_t midi_in_size = data.midi_in_ports.size();
+  /*const std::size_t midi_in_size = data.midi_in_ports.size();
   const std::size_t midi_out_size = data.midi_out_ports.size();
   */
   const std::size_t cv_size = data.cv_ports.size();
@@ -468,6 +467,21 @@ void Model::readPlugin()
 
   effectContext.data.data_access
       = lilv_instance_get_descriptor(effectContext.instance)->extension_data;
+
+  fInControls.resize(in_size);
+  fOutControls.resize(out_size);
+
+  auto fInstance = effectContext.instance;
+  for (std::size_t i = 0; i < in_size; i++)
+  {
+    lilv_instance_connect_port(fInstance, data.control_in_ports[i], &fInControls[i]);
+  }
+
+  for (std::size_t i = 0; i < out_size; i++)
+  {
+    lilv_instance_connect_port(
+        fInstance, data.control_out_ports[i], &fOutControls[i]);
+  }
 }
 
 void Model::reload()

src/plugins/score-plugin-lv2/LV2/EffectModel.hpp

@@ -80,6 +80,8 @@ class Model : public Process::ProcessModel
   void reload();
   QString m_effectPath;
   void readPlugin();
+
+  ossia::float_vector fInControls, fOutControls;
 };
 
 class LV2EffectComponent final