always save/keep audio/MIDI setup states so that they are available for use *after* instances where JACK was already running

gtk2_ardour/ardour_ui.cc

@@ -214,6 +214,7 @@ ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[], const char* localedir)
 	}
 
 	ui_config = new UIConfiguration();
+	_audio_midi_setup = new EngineControl;
 
 	editor = 0;
 	mixer = 0;
@@ -4145,3 +4146,19 @@ ARDOUR_UI::reset_route_peak_display (Route* route)
 		reset_peak_display ();
 	}
 }
+
+EngineControl*
+ARDOUR_UI::audio_midi_setup_widget ()
+{
+	/* remove widget from any existing parent, since it is about
+	   to be packed somewhere else.
+	*/
+	
+	Gtk::Container* parent = _audio_midi_setup->get_parent ();
+
+	if (parent) {
+		parent->remove (*_audio_midi_setup);
+	}
+
+	return _audio_midi_setup;
+}

gtk2_ardour/ardour_ui.h

@@ -90,6 +90,7 @@ class BigClockWindow;
 class BundleManager;
 class ButtonJoiner;
 class ConnectionEditor;
+class EngineControl;
 class KeyEditor;
 class LocationUIWindow;
 class MainClock;
@@ -288,6 +289,8 @@ class ARDOUR_UI : public Gtkmm2ext::UI, public ARDOUR::SessionHandlePtr
 
         const std::string& announce_string() const { return _announce_string; }
 
+        EngineControl* audio_midi_setup_widget();
+
   protected:
 	friend class PublicEditor;
 
@@ -748,6 +751,8 @@ class ARDOUR_UI : public Gtkmm2ext::UI, public ARDOUR::SessionHandlePtr
 
         std::string _announce_string;
         void check_announcements ();
+
+        EngineControl* _audio_midi_setup;
 };
 
 #endif /* __ardour_gui_h__ */

gtk2_ardour/ardour_ui_ed.cc

@@ -647,11 +647,10 @@ ARDOUR_UI::save_ardour_state ()
 	window_node->add_child_nocopy (*tearoff_node);
 
 	Config->add_extra_xml (*window_node);
+	Config->add_extra_xml (_audio_midi_setup->get_state());
 
-	if (_startup && _startup->engine_control() && _startup->engine_control()->was_used()) {
-		Config->add_extra_xml (_startup->engine_control()->get_state());
-	}
 	Config->save_state();
+
 	if (ui_config->dirty()) {
 		ui_config->save_state ();
 	}

gtk2_ardour/engine_dialog.cc

@@ -68,7 +68,6 @@ EngineControl::EngineControl ()
 #else
 	, basic_packer (9, 2)
 #endif
-	, _used (false)
 {
 	using namespace Notebook_Helpers;
 	Label* label;
@@ -471,31 +470,28 @@ EngineControl::get_state ()
 	XMLNode* root = new XMLNode ("AudioMIDISetup");
 	std::string path;
 
-	if (_used) {
-
-		if (!states.empty()) {
-			XMLNode* state_nodes = new XMLNode ("EngineStates");
+	if (!states.empty()) {
+		XMLNode* state_nodes = new XMLNode ("EngineStates");
+		
+		for (StateList::const_iterator i = states.begin(); i != states.end(); ++i) {
 			
-			for (StateList::const_iterator i = states.begin(); i != states.end(); ++i) {
-
-				XMLNode* node = new XMLNode ("State");
-
-				node->add_property ("backend", (*i).backend);
-				node->add_property ("driver", (*i).driver);
-				node->add_property ("device", (*i).device);
-				node->add_property ("sample-rate", (*i).sample_rate);
-				node->add_property ("buffer-size", (*i).buffer_size);
-				node->add_property ("input-latency", (*i).input_latency);
-				node->add_property ("output-latency", (*i).output_latency);
-				node->add_property ("input-channels", (*i).input_channels);
-				node->add_property ("output-channels", (*i).output_channels);
-				node->add_property ("active", (*i).active ? "yes" : "no");
-	
-				state_nodes->add_child_nocopy (*node);
-			}
-
-			root->add_child_nocopy (*state_nodes);
+			XMLNode* node = new XMLNode ("State");
+			
+			node->add_property ("backend", (*i).backend);
+			node->add_property ("driver", (*i).driver);
+			node->add_property ("device", (*i).device);
+			node->add_property ("sample-rate", (*i).sample_rate);
+			node->add_property ("buffer-size", (*i).buffer_size);
+			node->add_property ("input-latency", (*i).input_latency);
+			node->add_property ("output-latency", (*i).output_latency);
+			node->add_property ("input-channels", (*i).input_channels);
+			node->add_property ("output-channels", (*i).output_channels);
+			node->add_property ("active", (*i).active ? "yes" : "no");
+			
+			state_nodes->add_child_nocopy (*node);
 		}
+		
+		root->add_child_nocopy (*state_nodes);
 	}
 
 	return *root;
@@ -518,6 +514,7 @@ EngineControl::set_state (const XMLNode& root)
 
 	states.clear ();
 
+
 	for (citer = clist.begin(); citer != clist.end(); ++citer) {
 
 		child = *citer;
@@ -653,13 +650,6 @@ EngineControl::setup_engine (bool start)
 			return -1;
 		}
 
-		/* we've used this dialog to configure the engine, which means
-		 * that our state becomes relevant for saving (and thus
-		 * implicitly, restoring.
-		 */
-
-		_used = true;
-
 		/* get a pointer to the current state object, creating one if
 		 * necessary
 		 */

gtk2_ardour/engine_dialog.h

@@ -41,7 +41,6 @@ class EngineControl : public Gtk::VBox {
 	static bool need_setup ();
 	int setup_engine (bool start);
 
-	bool was_used() const { return _used; }
 	XMLNode& get_state ();
 	void set_state (const XMLNode&);
 
@@ -96,8 +95,6 @@ class EngineControl : public Gtk::VBox {
     sigc::connection sr_connection;
     sigc::connection bs_connection;
     
-    bool _used;
-    
     static bool engine_running ();
     
     void driver_changed ();

gtk2_ardour/startup.cc

@@ -314,7 +314,7 @@ ArdourStartup::session_folder ()
 void
 ArdourStartup::setup_audio_page ()
 {
-	engine_dialog = manage (new EngineControl);
+	engine_dialog = ARDOUR_UI::instance()->audio_midi_setup_widget ();
 
 	engine_dialog->set_border_width (12);
 

gtk2_ardour/startup.h

@@ -56,8 +56,6 @@ class ArdourStartup : public Gtk::Assistant {
 	bool use_session_template();
 	std::string session_template_name();
 
-	EngineControl* engine_control() { return engine_dialog; }
-
 	// advanced session options
 
 	bool create_master_bus() const;