More NSM fixes

source/backend/CarlaStandalone.hpp

@@ -694,6 +694,11 @@ CARLA_EXPORT const char* carla_get_host_osc_url_udp();
  */
 CARLA_EXPORT void carla_nsm_announce(const char* url, const char* appName, int pid);
 
+/*!
+ * Ready for handling NSM messages.
+ */
+CARLA_EXPORT void carla_nsm_ready();
+
 /*!
  * Reply to NSM open message.
  * \see CALLBACK_NSM_OPEN

source/backend/standalone/CarlaStandalone.cpp

@@ -2124,6 +2124,7 @@ public:
     CarlaNSM()
         : fServerThread(nullptr),
           fReplyAddr(nullptr),
+          fIsReady(false),
           fIsOpened(false),
           fIsSaved(false)
     {
@@ -2173,6 +2174,11 @@ public:
         lo_address_free(addr);
     }
 
+    void ready()
+    {
+        fIsReady = true;
+    }
+
     void replyOpen()
     {
         fIsOpened = true;
@@ -2233,10 +2239,12 @@ protected:
         std::strcat(data, ":");
         std::strcat(data, clientId);
 
-        // wait max 6 secs for engine to start
-        for (int i=0; i < 60 && standalone.engine == nullptr; ++i)
+        // wait max 6 secs for host to init
+        for (int i=0; i < 60 && ! fIsReady; ++i)
             carla_msleep(100);
 
+        fIsOpened = false;
+
         standalone.callback(nullptr, CarlaBackend::CALLBACK_NSM_OPEN, 0, 0, 0, 0.0f, data);
 
         // wait max 10 secs to open
@@ -2270,10 +2278,12 @@ protected:
         if (fReplyAddr == nullptr)
             return 1;
 
+        fIsSaved = false;
+
         standalone.callback(nullptr, CarlaBackend::CALLBACK_NSM_SAVE, 0, 0, 0, 0.0f, nullptr);
 
         // wait max 10 secs to save
-        for (int i=0; i < 100 && ! fIsOpened; ++i)
+        for (int i=0; i < 100 && ! fIsSaved; ++i)
             carla_msleep(100);
 
 #ifndef BUILD_ANSI_TEST
@@ -2297,6 +2307,7 @@ private:
     lo_server_thread fServerThread;
     lo_address       fReplyAddr;
 
+    bool fIsReady; // used to startup, only once
     bool fIsOpened;
     bool fIsSaved;
 
@@ -2332,6 +2343,11 @@ void carla_nsm_announce(const char* url, const char* appName, int pid)
     gCarlaNSM.announce(url, appName, pid);
 }
 
+void carla_nsm_ready()
+{
+    gCarlaNSM.ready();
+}
+
 void carla_nsm_reply_open()
 {
     gCarlaNSM.replyOpen();

source/carla.py

@@ -891,7 +891,10 @@ class CarlaMainW(QMainWindow):
 
         self.setProperWindowTitle()
 
-        QTimer.singleShot(0, self, SLOT("slot_engineStart()"))
+        if NSM_URL:
+            Carla.host.nsm_ready()
+        else:
+            QTimer.singleShot(0, self, SLOT("slot_engineStart()"))
 
     def startEngine(self):
         # ---------------------------------------------

source/carla_backend.py

@@ -639,6 +639,9 @@ class Host(object):
         self.lib.carla_nsm_announce.argtypes = [c_char_p, c_char_p, c_int]
         self.lib.carla_nsm_announce.restype = None
 
+        self.lib.carla_nsm_ready.argtypes = None
+        self.lib.carla_nsm_ready.restype = None
+
         self.lib.carla_nsm_reply_open.argtypes = None
         self.lib.carla_nsm_reply_open.restype = None
 
@@ -898,6 +901,9 @@ class Host(object):
     def nsm_announce(self, url, appName_, pid):
         self.lib.carla_nsm_announce(url.encode("utf-8"), appName_.encode("utf-8"), pid)
 
+    def nsm_ready(self):
+        self.lib.carla_nsm_ready()
+
     def nsm_reply_open(self):
         self.lib.carla_nsm_reply_open()