allow to customize variable i/o plugin inputs
[ardour.git] / libs / ardour / engine_state_controller.cc
index 4bcf345175557767e06444ee424ab0832c3ab858..57b8a848884501e50ec0616cf2f78d726cc19c8b 100644 (file)
@@ -1,20 +1,20 @@
 /*
   Copyright (C) 2014 Waves Audio Ltd.
+
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
+
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
+
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
 */
 
 #include "ardour/engine_state_controller.h"
@@ -33,66 +33,66 @@ using namespace ARDOUR;
 using namespace PBD;
 
 namespace {
-    
+
 struct DevicePredicate
 {
-       DevicePredicate(const std::string& device_name)
-               : _device_name(device_name)
+       DevicePredicate (const std::string& device_name)
+               : _device_name (device_name)
        {}
-        
-       bool operator()(const AudioBackend::DeviceStatus& rhs)
+
+       bool operator ()(const AudioBackend::DeviceStatus& rhs)
        {
                return _device_name == rhs.name;
        }
-        
-    private:
+
+                                        private:
        std::string _device_name;
 };
 }
 
 EngineStateController*
-EngineStateController::instance()
+EngineStateController::instance ()
 {
        static EngineStateController instance;
        return &instance;
 }
 
 
-EngineStateController::EngineStateController()
-       : _current_state()
-       , _last_used_real_device("")
+EngineStateController::EngineStateController ()
+       : _current_state ()
+       , _last_used_real_device ("")
 
 {
        AudioEngine::instance ()->Running.connect_same_thread (running_connection, boost::bind (&EngineStateController::_on_engine_running, this));
        AudioEngine::instance ()->Stopped.connect_same_thread (stopped_connection, boost::bind (&EngineStateController::_on_engine_stopped, this));
        AudioEngine::instance ()->Halted.connect_same_thread (stopped_connection, boost::bind (&EngineStateController::_on_engine_stopped, this));
-    
+
        /* Subscribe for udpates from AudioEngine */
        AudioEngine::instance ()->PortRegisteredOrUnregistered.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_ports_registration_update, this));
-       AudioEngine::instance()->SampleRateChanged.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_sample_rate_change, this, _1));
-       AudioEngine::instance()->BufferSizeChanged.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_buffer_size_change, this, _1));
-       AudioEngine::instance()->DeviceListChanged.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_device_list_change, this));
-       AudioEngine::instance()->DeviceError.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_device_error, this));
-    
+       AudioEngine::instance ()->SampleRateChanged.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_sample_rate_change, this, _1));
+       AudioEngine::instance ()->BufferSizeChanged.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_buffer_size_change, this, _1));
+       AudioEngine::instance ()->DeviceListChanged.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_device_list_change, this));
+       AudioEngine::instance ()->DeviceError.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_device_error, this));
+
        /* Global configuration parameters update */
        Config->ParameterChanged.connect_same_thread (update_connections, boost::bind (&EngineStateController::_on_parameter_changed, this, _1));
-    
-       _deserialize_and_load_engine_states();
-       _deserialize_and_load_midi_port_states();
-       _do_initial_engine_setup();
-    
+
+       _deserialize_and_load_engine_states ();
+       _deserialize_and_load_midi_port_states ();
+       _do_initial_engine_setup ();
+
        // now push the sate to the backend
-       push_current_state_to_backend(false);
+       push_current_state_to_backend (false);
 }
 
 
-EngineStateController::~EngineStateController()
+EngineStateController::~EngineStateController ()
 {
 }
 
 
 void
-EngineStateController::set_session(Session* session)
+EngineStateController::set_session (Session* session)
 {
        _session = session;
        _session->SessionLoaded.connect_same_thread (session_connections, boost::bind (&EngineStateController::_on_session_loaded, this));
@@ -108,267 +108,267 @@ EngineStateController::remove_session ()
 
 
 XMLNode&
-EngineStateController::serialize_audio_midi_settings()
+EngineStateController::serialize_audio_midi_settings ()
 {
-    
+
        XMLNode* root = new XMLNode ("AudioMidiSettings");
-    
-       _serialize_engine_states(root);
-       _serialize_midi_port_states(root);
-    
+
+       _serialize_engine_states (root);
+       _serialize_midi_port_states (root);
+
        return *root;
 }
 
 
 void
-EngineStateController::save_audio_midi_settings()
+EngineStateController::save_audio_midi_settings ()
 {
-       Config->add_extra_xml (serialize_audio_midi_settings());
+       Config->add_extra_xml (serialize_audio_midi_settings ());
        Config->save_state ();
 }
 
 
 void
-EngineStateController::_deserialize_and_load_engine_states()
+EngineStateController::_deserialize_and_load_engine_states ()
 {
        XMLNode* audio_midi_settings_root = ARDOUR::Config->extra_xml ("AudioMidiSettings");
-    
+
        if (!audio_midi_settings_root) {
                return;
        }
-    
-       XMLNode* engine_states = audio_midi_settings_root->child("EngineStates");
-    
+
+       XMLNode* engine_states = audio_midi_settings_root->child ("EngineStates");
+
        if (!engine_states) {
                return;
        }
-    
-       XMLNodeList state_nodes_list = engine_states->children();
-       XMLNodeConstIterator state_node_iter = state_nodes_list.begin();
-    
-       for (; state_node_iter != state_nodes_list.end(); ++state_node_iter) {
-        
+
+       XMLNodeList state_nodes_list = engine_states->children ();
+       XMLNodeConstIterator state_node_iter = state_nodes_list.begin ();
+
+       for (; state_node_iter != state_nodes_list.end (); ++state_node_iter) {
+
                XMLNode* state_node = *state_node_iter;
-               StatePtr engine_state(new State);
+               StatePtr engine_state (new State);
                XMLProperty* prop = NULL;
-        
+
                if ((prop = state_node->property ("backend-name")) == 0) {
                        continue;
                }
                engine_state->backend_name = prop->value ();
-        
+
                if ((prop = state_node->property ("device-name")) == 0) {
                        continue;
                }
                engine_state->device_name = prop->value ();
-        
+
                if ((prop = state_node->property ("sample-rate")) == 0) {
                        continue;
                }
                engine_state->sample_rate = atoi (prop->value ());
-        
+
                if ((prop = state_node->property ("buffer-size")) == 0) {
                        continue;
                }
                engine_state->buffer_size = atoi (prop->value ());
-        
+
                if ((prop = state_node->property ("active")) == 0) {
                        continue;
                }
                engine_state->active = string_is_affirmative (prop->value ());
-        
-               XMLNodeList state_children_list = state_node->children();
-               XMLNodeConstIterator state_child_iter = state_children_list.begin();
-        
-               for (; state_child_iter != state_children_list.end(); ++state_child_iter) {
+
+               XMLNodeList state_children_list = state_node->children ();
+               XMLNodeConstIterator state_child_iter = state_children_list.begin ();
+
+               for (; state_child_iter != state_children_list.end (); ++state_child_iter) {
                        XMLNode* state_child = *state_child_iter;
-                
-                       if (state_child->name() == "InputConfiguration") {
-                    
-                               XMLNodeList input_states_nodes = state_child->children();
-                               XMLNodeConstIterator input_state_node_iter = input_states_nodes.begin();
+
+                       if (state_child->name () == "InputConfiguration") {
+
+                               XMLNodeList input_states_nodes = state_child->children ();
+                               XMLNodeConstIterator input_state_node_iter = input_states_nodes.begin ();
                                PortStateList& input_states = engine_state->input_channel_states;
-                    
-                               for (; input_state_node_iter != input_states_nodes.end(); ++input_state_node_iter) {
-                        
+
+                               for (; input_state_node_iter != input_states_nodes.end (); ++input_state_node_iter) {
+
                                        XMLNode* input_state_node = *input_state_node_iter;
-                        
-                                       if (input_state_node->name() != "input") {
+
+                                       if (input_state_node->name () != "input") {
                                                continue;
                                        }
-                                       PortState input_state (input_state_node->name());
-                        
+                                       PortState input_state (input_state_node->name ());
+
                                        if ((prop = input_state_node->property ("name")) == 0) {
                                                continue;
                                        }
-                                       input_state.name = prop->value();
-                        
+                                       input_state.name = prop->value ();
+
                                        if ((prop = input_state_node->property ("active")) == 0) {
                                                continue;
                                        }
                                        input_state.active = string_is_affirmative (prop->value ());
-                        
-                                       input_states.push_back(input_state);
+
+                                       input_states.push_back (input_state);
                                }
-                    
-                       } else if (state_child->name() == "MultiOutConfiguration") {
-                    
-                               XMLNodeList multi_out_state_nodes = state_child->children();
-                               XMLNodeConstIterator multi_out_state_node_iter = multi_out_state_nodes.begin();
+
+                       } else if (state_child->name () == "MultiOutConfiguration") {
+
+                               XMLNodeList multi_out_state_nodes = state_child->children ();
+                               XMLNodeConstIterator multi_out_state_node_iter = multi_out_state_nodes.begin ();
                                PortStateList& multi_out_states = engine_state->multi_out_channel_states;
-                    
-                               for (; multi_out_state_node_iter != multi_out_state_nodes.end(); ++multi_out_state_node_iter) {
-                        
+
+                               for (; multi_out_state_node_iter != multi_out_state_nodes.end (); ++multi_out_state_node_iter) {
+
                                        XMLNode* multi_out_state_node = *multi_out_state_node_iter;
-                        
-                                       if (multi_out_state_node->name() != "output") {
+
+                                       if (multi_out_state_node->name () != "output") {
                                                continue;
                                        }
-                                       PortState multi_out_state (multi_out_state_node->name());
-                        
+                                       PortState multi_out_state (multi_out_state_node->name ());
+
                                        if ((prop = multi_out_state_node->property ("name")) == 0) {
                                                continue;
                                        }
-                                       multi_out_state.name = prop->value();
-                        
+                                       multi_out_state.name = prop->value ();
+
                                        if ((prop = multi_out_state_node->property ("active")) == 0) {
                                                continue;
                                        }
                                        multi_out_state.active = string_is_affirmative (prop->value ());
-                        
-                                       multi_out_states.push_back(multi_out_state);
+
+                                       multi_out_states.push_back (multi_out_state);
                                }
-                       } else if (state_child->name() == "StereoOutConfiguration") {
-                    
-                               XMLNodeList stereo_out_state_nodes = state_child->children();
-                               XMLNodeConstIterator stereo_out_state_node_iter = stereo_out_state_nodes.begin();
+                       } else if (state_child->name () == "StereoOutConfiguration") {
+
+                               XMLNodeList stereo_out_state_nodes = state_child->children ();
+                               XMLNodeConstIterator stereo_out_state_node_iter = stereo_out_state_nodes.begin ();
                                PortStateList& stereo_out_states = engine_state->stereo_out_channel_states;
-                    
-                               for (; stereo_out_state_node_iter != stereo_out_state_nodes.end(); ++stereo_out_state_node_iter) {
-                        
+
+                               for (; stereo_out_state_node_iter != stereo_out_state_nodes.end (); ++stereo_out_state_node_iter) {
+
                                        XMLNode* stereo_out_state_node = *stereo_out_state_node_iter;
-                        
-                                       if (stereo_out_state_node->name() != "output") {
+
+                                       if (stereo_out_state_node->name () != "output") {
                                                continue;
                                        }
-                                       PortState stereo_out_state (stereo_out_state_node->name());
-                        
+                                       PortState stereo_out_state (stereo_out_state_node->name ());
+
                                        if ((prop = stereo_out_state_node->property ("name")) == 0) {
                                                continue;
                                        }
-                                       stereo_out_state.name = prop->value();
-                        
+                                       stereo_out_state.name = prop->value ();
+
                                        if ((prop = stereo_out_state_node->property ("active")) == 0) {
                                                continue;
-                                       }                      
+                                       }
                                        stereo_out_state.active = string_is_affirmative (prop->value ());
-                        
-                                       stereo_out_states.push_back(stereo_out_state);
+
+                                       stereo_out_states.push_back (stereo_out_state);
                                }
                        }
                }
-        
+
                _states.push_back (engine_state);
        }
 }
 
 
 void
-EngineStateController::_deserialize_and_load_midi_port_states()
-{  
+EngineStateController::_deserialize_and_load_midi_port_states ()
+{
        XMLNode* audio_midi_settings_root = ARDOUR::Config->extra_xml ("AudioMidiSettings");
-    
+
        if (!audio_midi_settings_root) {
                return;
        }
-    
-       XMLNode* midi_states = audio_midi_settings_root->child("MidiStates");
-    
+
+       XMLNode* midi_states = audio_midi_settings_root->child ("MidiStates");
+
        if (!midi_states) {
                return;
        }
-    
-       XMLNodeList state_nodes_list = midi_states->children();
-       XMLNodeConstIterator state_node_iter = state_nodes_list.begin();
-       for (; state_node_iter != state_nodes_list.end(); ++state_node_iter) {
-        
+
+       XMLNodeList state_nodes_list = midi_states->children ();
+       XMLNodeConstIterator state_node_iter = state_nodes_list.begin ();
+       for (; state_node_iter != state_nodes_list.end (); ++state_node_iter) {
+
                XMLNode* state_node = *state_node_iter;
-               if (state_node->name() == "MidiInputs") {
-            
-                       XMLNodeList input_state_nodes = state_node->children();
-                       XMLNodeConstIterator input_state_node_iter = input_state_nodes.begin();
-                       _midi_inputs.clear();
-            
-                       for (; input_state_node_iter != input_state_nodes.end(); ++input_state_node_iter) {
-                
+               if (state_node->name () == "MidiInputs") {
+
+                       XMLNodeList input_state_nodes = state_node->children ();
+                       XMLNodeConstIterator input_state_node_iter = input_state_nodes.begin ();
+                       _midi_inputs.clear ();
+
+                       for (; input_state_node_iter != input_state_nodes.end (); ++input_state_node_iter) {
+
                                XMLNode* input_state_node = *input_state_node_iter;
                                XMLProperty* prop = NULL;
-                
-                               if (input_state_node->name() != "input") {
+
+                               if (input_state_node->name () != "input") {
                                        continue;
                                }
-                               MidiPortState input_state (input_state_node->name());
-                
+                               MidiPortState input_state (input_state_node->name ());
+
                                if ((prop = input_state_node->property ("name")) == 0) {
                                        continue;
                                }
-                               input_state.name = prop->value();
-                
+                               input_state.name = prop->value ();
+
                                if ((prop = input_state_node->property ("active")) == 0) {
                                        continue;
                                }
                                input_state.active = string_is_affirmative (prop->value ());
-                
+
                                if ((prop = input_state_node->property ("scene-connected")) == 0) {
                                        continue;
                                }
                                input_state.scene_connected = string_is_affirmative (prop->value ());
-                
+
                                if ((prop = input_state_node->property ("mtc-in")) == 0) {
                                        continue;
                                }
                                input_state.mtc_in = string_is_affirmative (prop->value ());
-                
-                               _midi_inputs.push_back(input_state);
+
+                               _midi_inputs.push_back (input_state);
                        }
-            
-               } else if (state_node->name() == "MidiOutputs") {
-            
-                       XMLNodeList output_state_nodes = state_node->children();
-                       XMLNodeConstIterator output_state_node_iter = output_state_nodes.begin();
-                       _midi_outputs.clear();
-            
-                       for (; output_state_node_iter != output_state_nodes.end(); ++output_state_node_iter) {
-                
+
+               } else if (state_node->name () == "MidiOutputs") {
+
+                       XMLNodeList output_state_nodes = state_node->children ();
+                       XMLNodeConstIterator output_state_node_iter = output_state_nodes.begin ();
+                       _midi_outputs.clear ();
+
+                       for (; output_state_node_iter != output_state_nodes.end (); ++output_state_node_iter) {
+
                                XMLNode* output_state_node = *output_state_node_iter;
                                XMLProperty* prop = NULL;
-                
-                               if (output_state_node->name() != "output") {
+
+                               if (output_state_node->name () != "output") {
                                        continue;
                                }
-                               MidiPortState output_state (output_state_node->name());
-                
+                               MidiPortState output_state (output_state_node->name ());
+
                                if ((prop = output_state_node->property ("name")) == 0) {
                                        continue;
                                }
-                               output_state.name = prop->value();
-                
+                               output_state.name = prop->value ();
+
                                if ((prop = output_state_node->property ("active")) == 0) {
                                        continue;
                                }
                                output_state.active = string_is_affirmative (prop->value ());
-                
+
                                if ((prop = output_state_node->property ("scene-connected")) == 0) {
                                        continue;
                                }
                                output_state.scene_connected = string_is_affirmative (prop->value ());
-                
+
                                if ((prop = output_state_node->property ("mtc-in")) == 0) {
                                        continue;
                                }
                                output_state.mtc_in = string_is_affirmative (prop->value ());
-                
-                               _midi_outputs.push_back(output_state);
+
+                               _midi_outputs.push_back (output_state);
                        }
                }
        }
@@ -376,219 +376,219 @@ EngineStateController::_deserialize_and_load_midi_port_states()
 
 
 void
-EngineStateController::_serialize_engine_states(XMLNode* audio_midi_settings_node)
+EngineStateController::_serialize_engine_states (XMLNode* audio_midi_settings_node)
 {
        if (!audio_midi_settings_node) {
                return;
        }
-    
+
        // clean up state data first
-       audio_midi_settings_node->remove_nodes_and_delete("EngineStates" );
-    
-       XMLNode* engine_states = new XMLNode("EngineStates" );
-    
-       StateList::const_iterator state_iter = _states.begin();
-       for (; state_iter != _states.end(); ++state_iter) {
-        
+       audio_midi_settings_node->remove_nodes_and_delete ("EngineStates" );
+
+       XMLNode* engine_states = new XMLNode ("EngineStates" );
+
+       StateList::const_iterator state_iter = _states.begin ();
+       for (; state_iter != _states.end (); ++state_iter) {
+
                StatePtr state_ptr = *state_iter;
-        
+
                // create new node for the state
-               XMLNode* state_node = new XMLNode("State");
-        
+               XMLNode* state_node = new XMLNode ("State");
+
                state_node->add_property ("backend-name", state_ptr->backend_name);
                state_node->add_property ("device-name", state_ptr->device_name);
                state_node->add_property ("sample-rate", state_ptr->sample_rate);
                state_node->add_property ("buffer-size", state_ptr->buffer_size);
                state_node->add_property ("active", state_ptr->active ? "yes" : "no");
-        
+
                // store channel states:
                // inputs
-               XMLNode* input_config_node = new XMLNode("InputConfiguration");
+               XMLNode* input_config_node = new XMLNode ("InputConfiguration");
                PortStateList& input_channels = state_ptr->input_channel_states;
-               PortStateList::const_iterator input_state_iter = input_channels.begin();
-               for (; input_state_iter != input_channels.end(); ++input_state_iter) {
-                       XMLNode* input_state_node = new XMLNode("input");
+               PortStateList::const_iterator input_state_iter = input_channels.begin ();
+               for (; input_state_iter != input_channels.end (); ++input_state_iter) {
+                       XMLNode* input_state_node = new XMLNode ("input");
                        input_state_node->add_property ("name", input_state_iter->name);
                        input_state_node->add_property ("active", input_state_iter->active ? "yes" : "no");
-                       input_config_node->add_child_nocopy(*input_state_node);
+                       input_config_node->add_child_nocopy (*input_state_node);
                }
-               state_node->add_child_nocopy(*input_config_node);
-        
+               state_node->add_child_nocopy (*input_config_node);
+
                // multi out outputs
-               XMLNode* multi_out_config_node = new XMLNode("MultiOutConfiguration");
+               XMLNode* multi_out_config_node = new XMLNode ("MultiOutConfiguration");
                PortStateList& multi_out_channels = state_ptr->multi_out_channel_states;
-               PortStateList::const_iterator multi_out_state_iter = multi_out_channels.begin();
-               for (; multi_out_state_iter != multi_out_channels.end(); ++multi_out_state_iter) {
-                       XMLNode* multi_out_state_node = new XMLNode("output" );
+               PortStateList::const_iterator multi_out_state_iter = multi_out_channels.begin ();
+               for (; multi_out_state_iter != multi_out_channels.end (); ++multi_out_state_iter) {
+                       XMLNode* multi_out_state_node = new XMLNode ("output" );
                        multi_out_state_node->add_property ("name", multi_out_state_iter->name);
                        multi_out_state_node->add_property ("active", multi_out_state_iter->active ? "yes" : "no");
-                       multi_out_config_node->add_child_nocopy(*multi_out_state_node);
+                       multi_out_config_node->add_child_nocopy (*multi_out_state_node);
                }
-               state_node->add_child_nocopy(*multi_out_config_node);
-        
+               state_node->add_child_nocopy (*multi_out_config_node);
+
                // stereo out outputs
-               XMLNode* stereo_out_config_node = new XMLNode("StereoOutConfiguration");
+               XMLNode* stereo_out_config_node = new XMLNode ("StereoOutConfiguration");
                PortStateList& stereo_out_channels = state_ptr->stereo_out_channel_states;
-               PortStateList::const_iterator stereo_out_state_iter = stereo_out_channels.begin();
-               for (; stereo_out_state_iter != stereo_out_channels.end(); ++stereo_out_state_iter) {
-                       XMLNode* stereo_out_state_node = new XMLNode("output" );
+               PortStateList::const_iterator stereo_out_state_iter = stereo_out_channels.begin ();
+               for (; stereo_out_state_iter != stereo_out_channels.end (); ++stereo_out_state_iter) {
+                       XMLNode* stereo_out_state_node = new XMLNode ("output" );
                        stereo_out_state_node->add_property ("name", stereo_out_state_iter->name);
                        stereo_out_state_node->add_property ("active", stereo_out_state_iter->active ? "yes" : "no");
-                       stereo_out_config_node->add_child_nocopy(*stereo_out_state_node);
+                       stereo_out_config_node->add_child_nocopy (*stereo_out_state_node);
                }
-               state_node->add_child_nocopy(*stereo_out_config_node);
-    
-               engine_states->add_child_nocopy(*state_node);
+               state_node->add_child_nocopy (*stereo_out_config_node);
+
+               engine_states->add_child_nocopy (*state_node);
        }
 
-       audio_midi_settings_node->add_child_nocopy(*engine_states);
+       audio_midi_settings_node->add_child_nocopy (*engine_states);
 }
 
 
 void
-EngineStateController::_serialize_midi_port_states(XMLNode* audio_midi_settings_node)
+EngineStateController::_serialize_midi_port_states (XMLNode* audio_midi_settings_node)
 {
        if (!audio_midi_settings_node) {
                return;
        }
-    
+
        // clean up state data first
-       audio_midi_settings_node->remove_nodes_and_delete("MidiStates" );
-    
-       XMLNode* midi_states_node = new XMLNode("MidiStates" );
-    
-       XMLNode* midi_input_states_node = new XMLNode("MidiInputs" );
-       MidiPortStateList::const_iterator midi_input_state_iter = _midi_inputs.begin();
-       for (; midi_input_state_iter != _midi_inputs.end(); ++midi_input_state_iter) {
-               XMLNode* midi_input_node = new XMLNode("input" );
+       audio_midi_settings_node->remove_nodes_and_delete ("MidiStates" );
+
+       XMLNode* midi_states_node = new XMLNode ("MidiStates" );
+
+       XMLNode* midi_input_states_node = new XMLNode ("MidiInputs" );
+       MidiPortStateList::const_iterator midi_input_state_iter = _midi_inputs.begin ();
+       for (; midi_input_state_iter != _midi_inputs.end (); ++midi_input_state_iter) {
+               XMLNode* midi_input_node = new XMLNode ("input" );
                midi_input_node->add_property ("name", midi_input_state_iter->name);
                midi_input_node->add_property ("active", midi_input_state_iter->active ? "yes" : "no");
                midi_input_node->add_property ("scene_connected", midi_input_state_iter->scene_connected ? "yes" : "no");
                midi_input_node->add_property ("mtc-in", midi_input_state_iter->mtc_in ? "yes" : "no");
-               midi_input_states_node->add_child_nocopy(*midi_input_node);
-       }
-       midi_states_node->add_child_nocopy(*midi_input_states_node);
-    
-       XMLNode* midi_output_states_node = new XMLNode("MidiOutputs" );
-       MidiPortStateList::const_iterator midi_output_state_iter = _midi_outputs.begin();
-       for (; midi_output_state_iter != _midi_outputs.end(); ++midi_output_state_iter) {
-               XMLNode* midi_output_node = new XMLNode("output" );
+               midi_input_states_node->add_child_nocopy (*midi_input_node);
+       }
+       midi_states_node->add_child_nocopy (*midi_input_states_node);
+
+       XMLNode* midi_output_states_node = new XMLNode ("MidiOutputs" );
+       MidiPortStateList::const_iterator midi_output_state_iter = _midi_outputs.begin ();
+       for (; midi_output_state_iter != _midi_outputs.end (); ++midi_output_state_iter) {
+               XMLNode* midi_output_node = new XMLNode ("output" );
                midi_output_node->add_property ("name", midi_output_state_iter->name);
                midi_output_node->add_property ("active", midi_output_state_iter->active ? "yes" : "no");
                midi_output_node->add_property ("scene_connected", midi_output_state_iter->scene_connected ? "yes" : "no");
                midi_output_node->add_property ("mtc-in", midi_output_state_iter->mtc_in ? "yes" : "no");
-               midi_output_states_node->add_child_nocopy(*midi_output_node);
+               midi_output_states_node->add_child_nocopy (*midi_output_node);
        }
-       midi_states_node->add_child_nocopy(*midi_output_states_node);
+       midi_states_node->add_child_nocopy (*midi_output_states_node);
 
-       audio_midi_settings_node->add_child_nocopy(*midi_states_node);
+       audio_midi_settings_node->add_child_nocopy (*midi_states_node);
 }
 
 
 bool
-EngineStateController::_apply_state(const StatePtr& state)
+EngineStateController::_apply_state (const StatePtr& state)
 {
        bool applied = false;
-    
-       if (set_new_backend_as_current(state->backend_name)) {
-               applied = set_new_device_as_current(state->device_name);
+
+       if (set_new_backend_as_current (state->backend_name)) {
+               applied = set_new_device_as_current (state->device_name);
        }
-    
+
        return applied;
 }
 
 
 void
-EngineStateController::_do_initial_engine_setup()
+EngineStateController::_do_initial_engine_setup ()
 {
        bool state_applied = false;
-    
+
        // if we have no saved state load default values
-       if (!_states.empty()) {
-        
+       if (!_states.empty ()) {
+
                // look for last active state first
-               StateList::const_iterator state_iter = _states.begin();
-               for (; state_iter != _states.end(); ++state_iter) {
+               StateList::const_iterator state_iter = _states.begin ();
+               for (; state_iter != _states.end (); ++state_iter) {
                        if ( (*state_iter)->active ) {
-                               state_applied = _apply_state(*state_iter);
+                               state_applied = _apply_state (*state_iter);
                                break;
                        }
                }
-        
+
                // last active state was not applied
                // try others
                if (!state_applied) {
-                       StateList::const_iterator state_iter = _states.begin();
-                       for (; state_iter != _states.end(); ++state_iter) {
-                               state_applied = _apply_state(*state_iter);
+                       StateList::const_iterator state_iter = _states.begin ();
+                       for (; state_iter != _states.end (); ++state_iter) {
+                               state_applied = _apply_state (*state_iter);
                                break;
                        }
                }
        }
 
        if (!state_applied ){
-               std::vector<const AudioBackendInfo*> backends = AudioEngine::instance()->available_backends();
-        
-               if (!backends.empty()) {
-            
-                       if (!set_new_backend_as_current(backends.front()->name )) {
-                               std::cerr << "\tfailed to set backend [" << backends.front()->name << "]\n";
+               std::vector<const AudioBackendInfo*> backends = AudioEngine::instance ()->available_backends ();
+
+               if (!backends.empty ()) {
+
+                       if (!set_new_backend_as_current (backends.front ()->name )) {
+                               std::cerr << "\tfailed to set backend [" << backends.front ()->name << "]\n";
                        }
                }
-        
+
        }
 }
 
 
 bool
-EngineStateController::_validate_current_device_state()
+EngineStateController::_validate_current_device_state ()
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-    
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+
        // check if device parameters from the state record are still valid
        // validate sample rate
        std::vector<float> sample_rates = backend->available_sample_rates (_current_state->device_name);
-    
-       if (sample_rates.empty()) {
+
+       if (sample_rates.empty ()) {
                return false;
        }
 
        // check if session desired sample rate (if it's set) could be used with this device
        if (_session != 0) {
-        
+
                if ( !set_new_sample_rate_in_controller (_session->nominal_frame_rate ())) {
-                       if ( !set_new_sample_rate_in_controller (backend->default_sample_rate()) ) {
-                               if (!set_new_sample_rate_in_controller (sample_rates.front()) ) {
+                       if ( !set_new_sample_rate_in_controller (backend->default_sample_rate ()) ) {
+                               if (!set_new_sample_rate_in_controller (sample_rates.front ()) ) {
                                        return false;
                                }
                        }
                }
-    
+
        } else {
                // check if current sample rate is supported because we have no session desired sample rate value
                if ( !set_new_sample_rate_in_controller (_current_state->sample_rate)) {
-                       if ( !set_new_sample_rate_in_controller (backend->default_sample_rate()) ) {
-                               if (!set_new_sample_rate_in_controller (sample_rates.front()) ) {
+                       if ( !set_new_sample_rate_in_controller (backend->default_sample_rate ()) ) {
+                               if (!set_new_sample_rate_in_controller (sample_rates.front ()) ) {
                                        return false;
                                }
                        }
                }
        }
-    
+
        // validate buffer size
        std::vector<pframes_t> buffer_sizes = backend->available_buffer_sizes (_current_state->device_name);
        // check if buffer size is supported
-       std::vector<pframes_t>::iterator bs_iter = std::find (buffer_sizes.begin(), buffer_sizes.end(), _current_state->buffer_size);
+       std::vector<pframes_t>::iterator bs_iter = std::find (buffer_sizes.begin (), buffer_sizes.end (), _current_state->buffer_size);
        // if current is not found switch to default if is supported
-       if (bs_iter == buffer_sizes.end()) {
-               bs_iter = std::find (buffer_sizes.begin(), buffer_sizes.end(), backend->default_buffer_size (_current_state->device_name));
-       
-               if (bs_iter != buffer_sizes.end()) {
+       if (bs_iter == buffer_sizes.end ()) {
+               bs_iter = std::find (buffer_sizes.begin (), buffer_sizes.end (), backend->default_buffer_size (_current_state->device_name));
+
+               if (bs_iter != buffer_sizes.end ()) {
                        _current_state->buffer_size = backend->default_buffer_size (_current_state->device_name);
                } else {
-                       if (!buffer_sizes.empty()) {
-                               _current_state->buffer_size = buffer_sizes.front();
+                       if (!buffer_sizes.empty ()) {
+                               _current_state->buffer_size = buffer_sizes.front ();
                        }
                }
 
@@ -598,247 +598,326 @@ EngineStateController::_validate_current_device_state()
 }
 
 
+void
+EngineStateController::_update_ltc_source_port ()
+{
+       // this method is called if the list of ports is changed
+
+       // check that ltc-in port from Config still exists
+       if (_audio_input_port_exists (get_ltc_source_port ())) {
+               // audio port, that was saved in Config, exists
+               return ;
+       }
+
+       //otherwise set first available audio port
+       if (!_current_state->input_channel_states.empty ()) {
+               set_ltc_source_port (_current_state->input_channel_states.front ().name);
+               return ;
+       }
+
+       // no available audio-in ports
+       set_ltc_source_port ("");
+}
+
+void
+EngineStateController::_update_ltc_output_port ()
+{
+       // this method is called if the list of ports is changed
+
+       // check that ltc-out port from Config still exists
+       if (_audio_output_port_exists (get_ltc_output_port ())) {
+               // audio port, that was saved in Config, exists
+               return ;
+       }
+
+       PortStateList* output_states;
+       if (Config->get_output_auto_connect () & AutoConnectMaster) {
+               output_states = &_current_state->stereo_out_channel_states;
+       } else {
+               output_states = &_current_state->multi_out_channel_states;
+       }
+
+       //otherwise set first available audio port
+       if (!output_states->empty ()) {
+               set_ltc_output_port (output_states->front ().name);
+               return ;
+       }
+
+       // no available audio-out ports
+       set_ltc_output_port ("");
+}
+
+
+bool
+EngineStateController::_audio_input_port_exists (const std::string& port_name)
+{
+       PortStateList::const_iterator iter = _current_state->input_channel_states.begin ();
+       for (; iter != _current_state->input_channel_states.end (); ++iter ) {
+               if (iter->name == port_name)
+                       return true;
+       }
+       return false;
+}
+
+bool
+EngineStateController::_audio_output_port_exists (const std::string& port_name)
+{
+       PortStateList* output_states;
+       if (Config->get_output_auto_connect () & AutoConnectMaster) {
+               output_states = &_current_state->stereo_out_channel_states;
+       } else {
+               output_states = &_current_state->multi_out_channel_states;
+       }
+
+       PortStateList::const_iterator iter = output_states->begin ();
+       for (; iter != output_states->end (); ++iter ) {
+               if (iter->name == port_name)
+                       return true;
+       }
+       return false;
+}
+
+
 const std::string&
-EngineStateController::get_current_backend_name() const
+EngineStateController::get_current_backend_name () const
 {
        return _current_state->backend_name;
 }
 
 
 const std::string&
-EngineStateController::get_current_device_name() const
+EngineStateController::get_current_device_name () const
 {
        return _current_state->device_name;
 }
 
 
 void
-EngineStateController::available_backends(std::vector<const AudioBackendInfo*>& available_backends)
+EngineStateController::available_backends (std::vector<const AudioBackendInfo*>& available_backends)
 {
-       available_backends = AudioEngine::instance()->available_backends();
+       available_backends = AudioEngine::instance ()->available_backends ();
 }
 
 
 void
 EngineStateController::enumerate_devices (std::vector<AudioBackend::DeviceStatus>& device_vector) const
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-       device_vector = backend->enumerate_devices();
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+       device_vector = backend->enumerate_devices ();
 }
 
 
 framecnt_t
-EngineStateController::get_current_sample_rate() const
+EngineStateController::get_current_sample_rate () const
 {
        return _current_state->sample_rate;
 }
 
 
 framecnt_t
-EngineStateController::get_default_sample_rate() const
+EngineStateController::get_default_sample_rate () const
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-       return backend->default_sample_rate();
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+       return backend->default_sample_rate ();
 }
 
 
 void
-EngineStateController::available_sample_rates_for_current_device(std::vector<float>& sample_rates) const
+EngineStateController::available_sample_rates_for_current_device (std::vector<float>& sample_rates) const
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
        sample_rates = backend->available_sample_rates (_current_state->device_name);
 }
 
 
 uint32_t
-EngineStateController::get_current_buffer_size() const
+EngineStateController::get_current_buffer_size () const
 {
        return _current_state->buffer_size;
 }
 
 
 uint32_t
-EngineStateController::get_default_buffer_size() const
+EngineStateController::get_default_buffer_size () const
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-       return backend->default_buffer_size(_current_state->device_name);
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+       return backend->default_buffer_size (_current_state->device_name);
 }
 
 
 void
-EngineStateController::available_buffer_sizes_for_current_device(std::vector<pframes_t>& buffer_sizes) const
+EngineStateController::available_buffer_sizes_for_current_device (std::vector<pframes_t>& buffer_sizes) const
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
        buffer_sizes = backend->available_buffer_sizes (_current_state->device_name);
 }
 
 
 bool
-EngineStateController::set_new_backend_as_current(const std::string& backend_name)
+EngineStateController::set_new_backend_as_current (const std::string& backend_name)
 {
-       if (backend_name == AudioEngine::instance()->current_backend_name ()) {
+       if (backend_name == AudioEngine::instance ()->current_backend_name ()) {
                return true;
        }
-    
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->set_backend (backend_name, PROGRAM_NAME, "");
+
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->set_backend (backend_name, PROGRAM_NAME, "");
        if (backend)
        {
                if (_current_state != NULL) {
                        _current_state->active = false;
                }
-        
-               StateList::iterator found_state_iter = find_if (_states.begin(), _states.end(),
-                                                               State::StatePredicate(backend_name, "None"));
-        
-               if (found_state_iter != _states.end()) {
+
+               StateList::iterator found_state_iter = find_if (_states.begin (), _states.end (),
+                                                               State::StatePredicate (backend_name, "None"));
+
+               if (found_state_iter != _states.end ()) {
                        // we found a record for new engine with None device - switch to it
                        _current_state = *found_state_iter;
-                       _validate_current_device_state();
+                       _validate_current_device_state ();
                } else {
                        // create new record for this engine with default device
-                       _current_state = boost::shared_ptr<State>(new State());
+                       _current_state = boost::shared_ptr<State>(new State ());
                        _current_state->backend_name = backend_name;
                        _current_state->device_name = "None";
-                       _validate_current_device_state();
-                       _states.push_front(_current_state);
+                       _validate_current_device_state ();
+                       _states.push_front (_current_state);
                }
-        
-               push_current_state_to_backend(false);
-        
+
+               push_current_state_to_backend (false);
+
                return true;
        }
-    
+
        return false;
 }
 
 
 bool
-EngineStateController::set_new_device_as_current(const std::string& device_name)
+EngineStateController::set_new_device_as_current (const std::string& device_name)
 {
        if (_current_state->device_name == device_name) {
                return true;
        }
-    
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-    
-       std::vector<AudioBackend::DeviceStatus> device_vector = backend->enumerate_devices();
-    
+
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+
+       std::vector<AudioBackend::DeviceStatus> device_vector = backend->enumerate_devices ();
+
        // validate the device
        std::vector<AudioBackend::DeviceStatus>::iterator device_iter;
-       device_iter = std::find_if (device_vector.begin(), device_vector.end(), DevicePredicate(device_name));
-    
+       device_iter = std::find_if (device_vector.begin (), device_vector.end (), DevicePredicate (device_name));
+
        // device is available
-       if (device_iter != device_vector.end()) {
-        
+       if (device_iter != device_vector.end ()) {
+
                boost::shared_ptr<State> previous_state (_current_state);
-        
+
                // look through state list and find the record for this device and current engine
-               StateList::iterator found_state_iter = find_if (_states.begin(), _states.end(),
-                                                               State::StatePredicate(backend->name(), device_name));
-        
-               if (found_state_iter != _states.end())
+               StateList::iterator found_state_iter = find_if (_states.begin (), _states.end (),
+                                                               State::StatePredicate (backend->name (), device_name));
+
+               if (found_state_iter != _states.end ())
                {
                        // we found a record for current engine and provided device name - switch to it
-            
+
                        _current_state = *found_state_iter;
-            
-                       if (!_validate_current_device_state()) {
+
+                       if (!_validate_current_device_state ()) {
                                _current_state = previous_state;
                                return false;
                        }
-        
+
                } else {
-       
+
                        // the record is not found, create new one
-                       _current_state = boost::shared_ptr<State>(new State());
-            
-                       _current_state->backend_name = backend->name();
+                       _current_state = boost::shared_ptr<State>(new State ());
+
+                       _current_state->backend_name = backend->name ();
                        _current_state->device_name = device_name;
-            
-                       if (!_validate_current_device_state()) {
+
+                       if (!_validate_current_device_state ()) {
                                _current_state = previous_state;
                                return false;
                        }
-            
-                       _states.push_front(_current_state);
+
+                       _states.push_front (_current_state);
                }
-        
+
                if (previous_state != NULL) {
                        previous_state->active = false;
                }
-        
-               push_current_state_to_backend(false);
 
-               _last_used_real_device.clear();
-        
+               push_current_state_to_backend (false);
+
+               _last_used_real_device.clear ();
+
                if (device_name != "None") {
                        _last_used_real_device = device_name;
                }
-        
+
                return true;
        }
-    
+
        // device is not supported by current backend
        return false;
 }
 
 
-
 bool
-EngineStateController::set_new_sample_rate_in_controller(framecnt_t sample_rate)
+EngineStateController::set_new_sample_rate_in_controller (framecnt_t sample_rate)
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-    
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+
        std::vector<float> sample_rates = backend->available_sample_rates (_current_state->device_name);
-       std::vector<float>::iterator iter = std::find (sample_rates.begin(), sample_rates.end(), (float)sample_rate);
-    
-       if (iter != sample_rates.end()) {
+       std::vector<float>::iterator iter = std::find (sample_rates.begin (), sample_rates.end (), (float)sample_rate);
+
+       if (iter != sample_rates.end ()) {
                _current_state->sample_rate = sample_rate;
                return true;
        }
-    
+
        return false;
 }
 
 
 bool
-EngineStateController::set_new_buffer_size_in_controller(pframes_t buffer_size)
-{    
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-    
+EngineStateController::set_new_buffer_size_in_controller (pframes_t buffer_size)
+{
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+
        std::vector<uint32_t> buffer_sizes = backend->available_buffer_sizes (_current_state->device_name);
-       std::vector<uint32_t>::iterator iter = std::find (buffer_sizes.begin(), buffer_sizes.end(), buffer_size);
+       std::vector<uint32_t>::iterator iter = std::find (buffer_sizes.begin (), buffer_sizes.end (), buffer_size);
 
-       if (iter != buffer_sizes.end()) {
+       if (iter != buffer_sizes.end ()) {
                _current_state->buffer_size = buffer_size;
                return true;
        }
-    
+
        return false;
 }
 
 
 uint32_t
-EngineStateController::get_available_inputs_count() const
+EngineStateController::get_available_inputs_count () const
 {
        uint32_t available_channel_count = 0;
-    
-       PortStateList::const_iterator iter = _current_state->input_channel_states.begin();
-    
-       for (; iter != _current_state->input_channel_states.end(); ++iter) {
+
+       PortStateList::const_iterator iter = _current_state->input_channel_states.begin ();
+
+       for (; iter != _current_state->input_channel_states.end (); ++iter) {
                if (iter->active) {
                        ++available_channel_count;
                }
        }
-    
+
        return available_channel_count;
 }
 
@@ -847,58 +926,58 @@ uint32_t
 EngineStateController::get_available_outputs_count () const
 {
        uint32_t available_channel_count = 0;
-    
+
        PortStateList* output_states;
-       if (Config->get_output_auto_connect() & AutoConnectMaster) {
+       if (Config->get_output_auto_connect () & AutoConnectMaster) {
                output_states = &_current_state->stereo_out_channel_states;
        } else {
                output_states = &_current_state->multi_out_channel_states;
        }
-    
-       PortStateList::const_iterator iter = output_states->begin();
-    
-       for (; iter != output_states->end(); ++iter) {
+
+       PortStateList::const_iterator iter = output_states->begin ();
+
+       for (; iter != output_states->end (); ++iter) {
                if (iter->active) {
                        ++available_channel_count;
                }
        }
-    
+
        return available_channel_count;
 }
 
 
 void
-EngineStateController::get_physical_audio_inputs(std::vector<std::string>& port_names)
+EngineStateController::get_physical_audio_inputs (std::vector<std::string>& port_names)
 {
-       port_names.clear();
-    
+       port_names.clear ();
+
        PortStateList &input_states = _current_state->input_channel_states;
-    
-       PortStateList::iterator iter = input_states.begin();
-       for (; iter != input_states.end(); ++iter) {
+
+       PortStateList::iterator iter = input_states.begin ();
+       for (; iter != input_states.end (); ++iter) {
                if (iter->active) {
-                       port_names.push_back(iter->name);
+                       port_names.push_back (iter->name);
                }
        }
 }
 
 
 void
-EngineStateController::get_physical_audio_outputs(std::vector<std::string>& port_names)
+EngineStateController::get_physical_audio_outputs (std::vector<std::string>& port_names)
 {
-       port_names.clear();
-    
+       port_names.clear ();
+
        PortStateList* output_states;
-       if (Config->get_output_auto_connect() & AutoConnectMaster) {
+       if (Config->get_output_auto_connect () & AutoConnectMaster) {
                output_states = &_current_state->stereo_out_channel_states;
        } else {
                output_states = &_current_state->multi_out_channel_states;
        }
-    
-       PortStateList::iterator iter = output_states->begin();
-       for (; iter != output_states->end(); ++iter) {
+
+       PortStateList::iterator iter = output_states->begin ();
+       for (; iter != output_states->end (); ++iter) {
                if (iter->active) {
-                       port_names.push_back(iter->name);
+                       port_names.push_back (iter->name);
                }
        }
 }
@@ -907,12 +986,12 @@ EngineStateController::get_physical_audio_outputs(std::vector<std::string>& port
 void
 EngineStateController::get_physical_midi_inputs (std::vector<std::string>& port_names)
 {
-       port_names.clear();
-    
-       MidiPortStateList::iterator iter = _midi_inputs.begin();
-       for (; iter != _midi_inputs.end(); ++iter) {
+       port_names.clear ();
+
+       MidiPortStateList::iterator iter = _midi_inputs.begin ();
+       for (; iter != _midi_inputs.end (); ++iter) {
                if (iter->available && iter->active) {
-                       port_names.push_back(iter->name);
+                       port_names.push_back (iter->name);
                }
        }
 }
@@ -921,77 +1000,77 @@ EngineStateController::get_physical_midi_inputs (std::vector<std::string>& port_
 void
 EngineStateController::get_physical_midi_outputs (std::vector<std::string>& port_names)
 {
-       port_names.clear();
-    
-       MidiPortStateList::iterator iter = _midi_outputs.begin();
-       for (; iter != _midi_outputs.end(); ++iter) {
+       port_names.clear ();
+
+       MidiPortStateList::iterator iter = _midi_outputs.begin ();
+       for (; iter != _midi_outputs.end (); ++iter) {
                if (iter->available && iter->active) {
-                       port_names.push_back(iter->name);
+                       port_names.push_back (iter->name);
                }
        }
 }
 
 
 void
-EngineStateController::set_physical_audio_input_state(const std::string& port_name, bool state)
+EngineStateController::set_physical_audio_input_state (const std::string& port_name, bool state)
 {
        PortStateList &input_states = _current_state->input_channel_states;
        PortStateList::iterator found_state_iter;
-       found_state_iter = std::find(input_states.begin(), input_states.end(), PortState(port_name));
-    
-       if (found_state_iter != input_states.end() && found_state_iter->active != state ) {
+       found_state_iter = std::find (input_states.begin (), input_states.end (), PortState (port_name));
+
+       if (found_state_iter != input_states.end () && found_state_iter->active != state ) {
                found_state_iter->active = state;
-               AudioEngine::instance()->reconnect_session_routes(true, false);
-        
-               InputConfigChanged();
+               AudioEngine::instance ()->reconnect_session_routes (true, false);
+
+               InputConfigChanged ();
        }
 }
 
 
 void
-EngineStateController::set_physical_audio_output_state(const std::string& port_name, bool state)
+EngineStateController::set_physical_audio_output_state (const std::string& port_name, bool state)
 {
        PortStateList* output_states;
-       if (Config->get_output_auto_connect() & AutoConnectMaster) {
+       if (Config->get_output_auto_connect () & AutoConnectMaster) {
                output_states = &_current_state->stereo_out_channel_states;
        } else {
                output_states = &_current_state->multi_out_channel_states;
        }
-    
+
        PortStateList::iterator target_state_iter;
-       target_state_iter = std::find(output_states->begin(), output_states->end(), PortState(port_name));
-    
-       if (target_state_iter != output_states->end() && target_state_iter->active != state ) {
+       target_state_iter = std::find (output_states->begin (), output_states->end (), PortState (port_name));
+
+       if (target_state_iter != output_states->end () && target_state_iter->active != state ) {
                target_state_iter->active = state;
-        
+
                // if StereoOut mode is used
-               if (Config->get_output_auto_connect() & AutoConnectMaster) {
-        
+               if (Config->get_output_auto_connect () & AutoConnectMaster) {
+
                        // get next element
-                       PortStateList::iterator next_state_iter(target_state_iter);
-            
+                       PortStateList::iterator next_state_iter (target_state_iter);
+
                        // loopback
-                       if (++next_state_iter == output_states->end()) {
-                               next_state_iter = output_states->begin();
+                       if (++next_state_iter == output_states->end ()) {
+                               next_state_iter = output_states->begin ();
                        }
-            
-            
+
+
                        // only two outputs should be enabled
-                       if (output_states->size() <= 2) {
-                
+                       if (output_states->size () <= 2) {
+
                                target_state_iter->active = true;
                                next_state_iter->active = true;
-                
+
                        } else {
-                
+
                                // if current was set to active - activate next and disable the rest
                                if (target_state_iter->active ) {
                                        next_state_iter->active = true;
                                } else {
                                        // if current was deactivated but the next is active
                                        if (next_state_iter->active) {
-                                               if (++next_state_iter == output_states->end()) {
-                                                       next_state_iter = output_states->begin();
+                                               if (++next_state_iter == output_states->end ()) {
+                                                       next_state_iter = output_states->begin ();
                                                }
                                                next_state_iter->active = true;
                                        } else {
@@ -1001,63 +1080,63 @@ EngineStateController::set_physical_audio_output_state(const std::string& port_n
                                                target_state_iter->active = true;
                                        }
                                }
-                
+
                                // now deactivate the rest
                                while (++next_state_iter != target_state_iter) {
-                    
-                                       if (next_state_iter == output_states->end()) {
-                                               next_state_iter = output_states->begin();
+
+                                       if (next_state_iter == output_states->end ()) {
+                                               next_state_iter = output_states->begin ();
                                                // we jumped, so additional check is required
                                                if (next_state_iter == target_state_iter) {
                                                        break;
                                                }
                                        }
-                    
+
                                        next_state_iter->active = false;
                                }
-                
+
                        }
                }
-            
-               AudioEngine::instance()->reconnect_session_routes(false, true);
-               OutputConfigChanged();
+
+               AudioEngine::instance ()->reconnect_session_routes (false, true);
+               OutputConfigChanged ();
        }
 }
 
 
 bool
-EngineStateController::get_physical_audio_input_state(const std::string& port_name)
+EngineStateController::get_physical_audio_input_state (const std::string& port_name)
 {
        bool state = false;
-    
+
        PortStateList &input_states = _current_state->input_channel_states;
        PortStateList::iterator found_state_iter;
-       found_state_iter = std::find(input_states.begin(), input_states.end(), PortState(port_name));
-    
-       if (found_state_iter != input_states.end()) {
+       found_state_iter = std::find (input_states.begin (), input_states.end (), PortState (port_name));
+
+       if (found_state_iter != input_states.end ()) {
                state = found_state_iter->active;
        }
-    
+
        return state;
 }
 
 
 bool
-EngineStateController::get_physical_audio_output_state(const std::string& port_name)
+EngineStateController::get_physical_audio_output_state (const std::string& port_name)
 {
        bool state = false;
-    
+
        PortStateList* output_states;
-       if (Config->get_output_auto_connect() & AutoConnectMaster) {
+       if (Config->get_output_auto_connect () & AutoConnectMaster) {
                output_states = &_current_state->stereo_out_channel_states;
        } else {
                output_states = &_current_state->multi_out_channel_states;
        }
-    
+
        PortStateList::iterator found_state_iter;
-       found_state_iter = std::find(output_states->begin(), output_states->end(), PortState(port_name));
-    
-       if (found_state_iter != output_states->end()) {
+       found_state_iter = std::find (output_states->begin (), output_states->end (), PortState (port_name));
+
+       if (found_state_iter != output_states->end ()) {
                state = found_state_iter->active;
        }
 
@@ -1066,260 +1145,264 @@ EngineStateController::get_physical_audio_output_state(const std::string& port_n
 
 
 void
-EngineStateController::set_physical_midi_input_state(const std::string& port_name, bool state) {
-    
+EngineStateController::set_physical_midi_input_state (const std::string& port_name, bool state) {
+
        MidiPortStateList::iterator found_state_iter;
-       found_state_iter = std::find(_midi_inputs.begin(), _midi_inputs.end(), MidiPortState(port_name));
-    
-       if (found_state_iter != _midi_inputs.end() && found_state_iter->available && found_state_iter->active != state ) {
+       found_state_iter = std::find (_midi_inputs.begin (), _midi_inputs.end (), MidiPortState (port_name));
+
+       if (found_state_iter != _midi_inputs.end () && found_state_iter->available && found_state_iter->active != state ) {
                found_state_iter->active = state;
-        
+
                if (_session) {
                        // reconnect MTC inputs as well
                        if (found_state_iter->mtc_in) {
                                _session->reconnect_mtc_ports ();
                        }
-                       _session->reconnect_mmc_ports(true);
+                       _session->reconnect_mmc_ports (true);
                }
-        
-               MIDIInputConfigChanged();
+
+               MIDIInputConfigChanged ();
        }
 }
 
 
 void
-EngineStateController::set_physical_midi_output_state(const std::string& port_name, bool state) {
-    
+EngineStateController::set_physical_midi_output_state (const std::string& port_name, bool state) {
+
        MidiPortStateList::iterator found_state_iter;
-       found_state_iter = std::find(_midi_outputs.begin(), _midi_outputs.end(), MidiPortState(port_name));
-    
-       if (found_state_iter != _midi_outputs.end() && found_state_iter->available && found_state_iter->active != state ) {
+       found_state_iter = std::find (_midi_outputs.begin (), _midi_outputs.end (), MidiPortState (port_name));
+
+       if (found_state_iter != _midi_outputs.end () && found_state_iter->available && found_state_iter->active != state ) {
                found_state_iter->active = state;
-        
+
                if (_session) {
-                       _session->reconnect_mmc_ports(false);
+                       _session->reconnect_mmc_ports (false);
                }
-        
-               MIDIOutputConfigChanged();
+
+               MIDIOutputConfigChanged ();
        }
 }
 
 
 bool
-EngineStateController::get_physical_midi_input_state(const std::string& port_name, bool& scene_connected) {
-    
+EngineStateController::get_physical_midi_input_state (const std::string& port_name, bool& scene_connected) {
+
        bool state = false;
-    
+
        MidiPortStateList::iterator found_state_iter;
-       found_state_iter = std::find(_midi_inputs.begin(), _midi_inputs.end(), MidiPortState(port_name));
-    
-       if (found_state_iter != _midi_inputs.end() && found_state_iter->available) {
+       found_state_iter = std::find (_midi_inputs.begin (), _midi_inputs.end (), MidiPortState (port_name));
+
+       if (found_state_iter != _midi_inputs.end () && found_state_iter->available) {
                state = found_state_iter->active;
                scene_connected = found_state_iter->scene_connected;
        }
-    
+
        return state;
 }
 
 
 bool
-EngineStateController::get_physical_midi_output_state(const std::string& port_name, bool& scene_connected) {
-    
+EngineStateController::get_physical_midi_output_state (const std::string& port_name, bool& scene_connected) {
+
        bool state = false;
-    
+
        MidiPortStateList::iterator found_state_iter;
-       found_state_iter = std::find(_midi_outputs.begin(), _midi_outputs.end(), MidiPortState(port_name));
-    
-       if (found_state_iter != _midi_outputs.end() && found_state_iter->available) {
+       found_state_iter = std::find (_midi_outputs.begin (), _midi_outputs.end (), MidiPortState (port_name));
+
+       if (found_state_iter != _midi_outputs.end () && found_state_iter->available) {
                state = found_state_iter->active;
                scene_connected = found_state_iter->scene_connected;
        }
-    
+
        return state;
 }
 
 
 void
-EngineStateController::set_physical_midi_scene_in_connection_state(const std::string& port_name, bool state) {
-    
+EngineStateController::set_physical_midi_scene_in_connection_state (const std::string& port_name, bool state) {
+
        MidiPortStateList::iterator found_state_iter;
-       found_state_iter = std::find(_midi_inputs.begin(), _midi_inputs.end(), MidiPortState(port_name));
-    
-       if (found_state_iter != _midi_inputs.end() && found_state_iter->available && found_state_iter->active ) {
+       found_state_iter = std::find (_midi_inputs.begin (), _midi_inputs.end (), MidiPortState (port_name));
+
+       if (found_state_iter != _midi_inputs.end () && found_state_iter->available && found_state_iter->active ) {
                found_state_iter->scene_connected = state;
-        
+
                std::vector<std::string> ports;
-               ports.push_back(port_name);
-               MIDISceneInputConnectionChanged(ports, state);
+               ports.push_back (port_name);
+               MIDISceneInputConnectionChanged (ports, state);
        }
 
 }
 
 
 void
-EngineStateController::set_physical_midi_scenen_out_connection_state(const std::string& port_name, bool state) {
-   
+EngineStateController::set_physical_midi_scenen_out_connection_state (const std::string& port_name, bool state) {
+
        MidiPortStateList::iterator found_state_iter;
-       found_state_iter = std::find(_midi_outputs.begin(), _midi_outputs.end(), MidiPortState(port_name));
-    
-       if (found_state_iter != _midi_outputs.end() && found_state_iter->available && found_state_iter->active ) {
+       found_state_iter = std::find (_midi_outputs.begin (), _midi_outputs.end (), MidiPortState (port_name));
+
+       if (found_state_iter != _midi_outputs.end () && found_state_iter->available && found_state_iter->active ) {
                found_state_iter->scene_connected = state;
-        
+
                std::vector<std::string> ports;
-               ports.push_back(port_name);
-               MIDISceneOutputConnectionChanged(ports, state);
+               ports.push_back (port_name);
+               MIDISceneOutputConnectionChanged (ports, state);
        }
 
 }
 
 
 void
-EngineStateController::set_all_midi_scene_inputs_disconnected()
+EngineStateController::set_all_midi_scene_inputs_disconnected ()
 {
-       MidiPortStateList::iterator iter = _midi_inputs.begin();
-       for (; iter != _midi_inputs.end(); ++iter) {
+       MidiPortStateList::iterator iter = _midi_inputs.begin ();
+       for (; iter != _midi_inputs.end (); ++iter) {
                iter->scene_connected = false;
        }
 
        std::vector<std::string> ports;
-       MIDISceneInputConnectionChanged(ports, false);
+       MIDISceneInputConnectionChanged (ports, false);
 }
 
 
 void
-EngineStateController::set_all_midi_scene_outputs_disconnected()
+EngineStateController::set_all_midi_scene_outputs_disconnected ()
 {
-       MidiPortStateList::iterator iter = _midi_outputs.begin();
-       for (; iter != _midi_outputs.end(); ++iter) {
+       MidiPortStateList::iterator iter = _midi_outputs.begin ();
+       for (; iter != _midi_outputs.end (); ++iter) {
                iter->scene_connected = false;
        }
-    
+
        std::vector<std::string> ports;
-       MIDISceneOutputConnectionChanged(ports, false);
+       MIDISceneOutputConnectionChanged (ports, false);
 }
 
 
 void
-EngineStateController::set_mtc_input(const std::string& port_name)
+EngineStateController::set_mtc_source_port (const std::string& port_name)
 {
-       MidiPortStateList::iterator iter = _midi_inputs.begin();
-       for (; iter != _midi_inputs.end(); ++iter) {
+       MidiPortStateList::iterator iter = _midi_inputs.begin ();
+       for (; iter != _midi_inputs.end (); ++iter) {
                iter->mtc_in = false;
-        
+
                if (iter->name == port_name) {
                        iter->mtc_in = true;
-            
+
                        if (_session) {
                                _session->reconnect_mtc_ports ();
                        }
                }
        }
-    
-       MTCInputChanged(port_name);
+
+       if (_session && port_name.empty ()) {
+               _session->reconnect_mtc_ports ();
+       }
+
+       MTCInputChanged (port_name);
 }
 
 
 void
-EngineStateController::set_state_to_all_inputs(bool state)
+EngineStateController::set_state_to_all_inputs (bool state)
 {
        bool something_changed = false;
-    
-       PortStateList::iterator iter = _current_state->input_channel_states.begin();
-       for (; iter != _current_state->input_channel_states.end(); ++iter) {
+
+       PortStateList::iterator iter = _current_state->input_channel_states.begin ();
+       for (; iter != _current_state->input_channel_states.end (); ++iter) {
                if (iter->active != state) {
                        iter->active = state;
                        something_changed = true;
                }
        }
-    
+
        if (something_changed) {
-               AudioEngine::instance()->reconnect_session_routes(true, false);
-               InputConfigChanged();
+               AudioEngine::instance ()->reconnect_session_routes (true, false);
+               InputConfigChanged ();
        }
 }
 
 
 void
-EngineStateController::set_state_to_all_outputs(bool state)
+EngineStateController::set_state_to_all_outputs (bool state)
 {
        // unapplicable in Stereo Out mode, just return
-       if (Config->get_output_auto_connect() & AutoConnectMaster) {
+       if (Config->get_output_auto_connect () & AutoConnectMaster) {
                return;
        }
-    
+
        bool something_changed = false;
-    
-       PortStateList::iterator iter = _current_state->multi_out_channel_states.begin();
-       for (; iter != _current_state->multi_out_channel_states.end(); ++iter) {
+
+       PortStateList::iterator iter = _current_state->multi_out_channel_states.begin ();
+       for (; iter != _current_state->multi_out_channel_states.end (); ++iter) {
                if (iter->active != state) {
                        iter->active = state;
                        something_changed = true;
                }
        }
-    
+
        if (something_changed) {
-               AudioEngine::instance()->reconnect_session_routes(false, true);
-               OutputConfigChanged();
+               AudioEngine::instance ()->reconnect_session_routes (false, true);
+               OutputConfigChanged ();
        }
 }
 
 
 void
-EngineStateController::get_physical_audio_input_states(std::vector<PortState>& channel_states)
+EngineStateController::get_physical_audio_input_states (std::vector<PortState>& channel_states)
 {
        PortStateList &input_states = _current_state->input_channel_states;
-       channel_states.assign(input_states.begin(), input_states.end());
+       channel_states.assign (input_states.begin (), input_states.end ());
 }
 
 
 void
-EngineStateController::get_physical_audio_output_states(std::vector<PortState>& channel_states)
+EngineStateController::get_physical_audio_output_states (std::vector<PortState>& channel_states)
 {
        PortStateList* output_states;
-       if (Config->get_output_auto_connect() & AutoConnectMaster) {
+       if (Config->get_output_auto_connect () & AutoConnectMaster) {
                output_states = &_current_state->stereo_out_channel_states;
        } else {
                output_states = &_current_state->multi_out_channel_states;
        }
-    
-       channel_states.assign(output_states->begin(), output_states->end());
+
+       channel_states.assign (output_states->begin (), output_states->end ());
 }
 
 
 void
 EngineStateController::get_physical_midi_input_states (std::vector<MidiPortState>& channel_states)
 {
-       channel_states.clear();
-    
-       MidiPortStateList::iterator iter = _midi_inputs.begin();
-    
-       for (; iter != _midi_inputs.end(); ++iter ) {
+       channel_states.clear ();
+
+       MidiPortStateList::iterator iter = _midi_inputs.begin ();
+
+       for (; iter != _midi_inputs.end (); ++iter ) {
                if (iter->available) {
-                       MidiPortState state(iter->name);
+                       MidiPortState state (iter->name);
                        state.active = iter->active;
                        state.available = true;
                        state.scene_connected = iter->scene_connected;
                        state.mtc_in = iter->mtc_in;
-                       channel_states.push_back(state);
+                       channel_states.push_back (state);
                }
-       }    
+       }
 }
 
 void
 EngineStateController::get_physical_midi_output_states (std::vector<MidiPortState>& channel_states)
 {
-       channel_states.clear();
-    
-       MidiPortStateList::iterator iter = _midi_outputs.begin();
-    
-       for (; iter != _midi_outputs.end(); ++iter ) {
+       channel_states.clear ();
+
+       MidiPortStateList::iterator iter = _midi_outputs.begin ();
+
+       for (; iter != _midi_outputs.end (); ++iter ) {
                if (iter->available) {
-                       MidiPortState state(iter->name);
+                       MidiPortState state (iter->name);
                        state.active = iter->active;
                        state.available = true;
                        state.scene_connected = iter->scene_connected;
                        state.mtc_in = iter->mtc_in;
-                       channel_states.push_back(state);
+                       channel_states.push_back (state);
                }
        }
 }
@@ -1331,199 +1414,203 @@ EngineStateController::_on_session_loaded ()
        if (!_session) {
                return;
        }
-    
-       AudioEngine::instance()->reconnect_session_routes(true, true);
+
+       AudioEngine::instance ()->reconnect_session_routes (true, true);
        _session->reconnect_mtc_ports ();
        _session->reconnect_mmc_ports (true);
        _session->reconnect_mmc_ports (false);
-       
+
+       // This is done during session construction
+       // _session->reconnect_ltc_input ();
+       // _session->reconnect_ltc_output ();
+
        framecnt_t desired_sample_rate = _session->nominal_frame_rate ();
-       if ( desired_sample_rate > 0 && set_new_sample_rate_in_controller(desired_sample_rate))
+       if ( desired_sample_rate > 0 && set_new_sample_rate_in_controller (desired_sample_rate))
        {
-               push_current_state_to_backend(false);
-               SampleRateChanged(); // emit a signal
+               push_current_state_to_backend (false);
+               SampleRateChanged (); // emit a signal
        }
 }
 
 
 void
-EngineStateController::_on_sample_rate_change(framecnt_t new_sample_rate)
+EngineStateController::_on_sample_rate_change (framecnt_t new_sample_rate)
 {
        if (_current_state->sample_rate != new_sample_rate) {
-        
+
                // if sample rate has been changed
                framecnt_t sample_rate_to_set = new_sample_rate;
-               if (AudioEngine::instance()->session()) {
+               if (AudioEngine::instance ()->session ()) {
                        // and we have current session we should restore it back to the one tracks uses
-                       sample_rate_to_set = AudioEngine::instance()->session()->frame_rate ();
+                       sample_rate_to_set = AudioEngine::instance ()->session ()->frame_rate ();
                }
-        
+
                if ( !set_new_sample_rate_in_controller (sample_rate_to_set)) {
                        // if sample rate can't be set
                        // switch to NONE device
                        set_new_device_as_current ("None");
-                       DeviceListChanged(false);
-                       DeviceError();
+                       DeviceListChanged (false);
+                       DeviceError ();
                }
        }
-    
-       SampleRateChanged(); // emit a signal
+
+       SampleRateChanged (); // emit a signal
 }
 
 
 void
-EngineStateController::_on_buffer_size_change(pframes_t new_buffer_size)
+EngineStateController::_on_buffer_size_change (pframes_t new_buffer_size)
 {
        if (_current_state->buffer_size != new_buffer_size) {
                _current_state->buffer_size = new_buffer_size;
        }
-    
-       BufferSizeChanged(); // emit a signal
+
+       BufferSizeChanged (); // emit a signal
 }
 
 
 void
-EngineStateController::_on_device_list_change()
+EngineStateController::_on_device_list_change ()
 {
        bool current_device_disconnected = false;
-    
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-    
-       std::vector<AudioBackend::DeviceStatus> device_vector = backend->enumerate_devices();
-    
-       // find out out if current device is still available if it's not None
-       if (_current_state->device_name != "None") {
 
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+
+       std::vector<AudioBackend::DeviceStatus> device_vector = backend->enumerate_devices ();
+
+       // find out out if current device is still available if it's not None
+       if (_current_state->device_name != "None")
+       {
                std::vector<AudioBackend::DeviceStatus>::iterator device_iter;
-               device_iter = std::find_if (device_vector.begin(), device_vector.end(), DevicePredicate(_current_state->device_name));
-        
+               device_iter = std::find_if (device_vector.begin (), device_vector.end (), DevicePredicate (_current_state->device_name));
+
                // if current device is not available any more - switch to None device
-               if (device_iter == device_vector.end()) {
-            
-                       StateList::iterator found_state_iter = find_if (_states.begin(), _states.end(),
-                                                                       State::StatePredicate(_current_state->backend_name, "None"));
-            
-                       if (found_state_iter != _states.end()) {
+               if (device_iter == device_vector.end ()) {
+
+                       StateList::iterator found_state_iter = find_if (_states.begin (), _states.end (),
+                                                                       State::StatePredicate (_current_state->backend_name, "None"));
+
+                       if (found_state_iter != _states.end ()) {
                                // found the record - switch to it
                                _current_state = *found_state_iter;
-                               _validate_current_device_state();
+                               _validate_current_device_state ();
                        } else {
                                // create new record for this engine with default device
-                               _current_state = boost::shared_ptr<State>(new State());
-                               _current_state->backend_name = backend->name();
+                               _current_state = boost::shared_ptr<State>(new State ());
+                               _current_state->backend_name = backend->name ();
                                _current_state->device_name = "None";
-                               _validate_current_device_state();
-                               _states.push_front(_current_state);
+                               _validate_current_device_state ();
+                               _states.push_front (_current_state);
                        }
-            
-                       push_current_state_to_backend(true);
+
+                       push_current_state_to_backend (true);
                        current_device_disconnected = true;
                }
        } else {
                // if the device which was active before is available now - switch to it
-        
+
                std::vector<AudioBackend::DeviceStatus>::iterator device_iter;
-               device_iter = std::find_if (device_vector.begin(), device_vector.end(), DevicePredicate(_last_used_real_device));
-        
-               if (device_iter != device_vector.end()) {
-                       StateList::iterator found_state_iter = find_if (_states.begin(), _states.end(),
-                                                                       State::StatePredicate(_current_state->backend_name,
+               device_iter = std::find_if (device_vector.begin (), device_vector.end (), DevicePredicate (_last_used_real_device));
+
+               if (device_iter != device_vector.end ()) {
+                       StateList::iterator found_state_iter = find_if (_states.begin (), _states.end (),
+                                                                       State::StatePredicate (_current_state->backend_name,
                                                                                              _last_used_real_device));
-            
-                       if (found_state_iter != _states.end()) {
-                
+
+                       if (found_state_iter != _states.end ()) {
+
                                boost::shared_ptr<State> previous_state (_current_state);
                                _current_state = *found_state_iter;
-                
-                               if (_validate_current_device_state()) {
-                                       push_current_state_to_backend(false);
+
+                               if (_validate_current_device_state ()) {
+                                       push_current_state_to_backend (false);
                                } else {
                                        // cannot use this device right now
-                                       _last_used_real_device.clear();
+                                       _last_used_real_device.clear ();
                                        _current_state = previous_state;
                                }
                        }
                }
        }
-    
-       DeviceListChanged(current_device_disconnected); // emit a signal    
+
+       DeviceListChanged (current_device_disconnected); // emit a signal
 }
 
 
 void
-EngineStateController::_update_device_channels_state()
+EngineStateController::_update_device_channels_state ()
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       assert(backend);
-    
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+       assert (backend);
+
        // update audio input states
        std::vector<std::string> phys_audio_inputs;
-       backend->get_physical_inputs(DataType::AUDIO, phys_audio_inputs);
-    
+       backend->get_physical_inputs (DataType::AUDIO, phys_audio_inputs);
+
        PortStateList new_input_states;
        PortStateList &input_states = _current_state->input_channel_states;
-    
-       std::vector<std::string>::const_iterator input_iter = phys_audio_inputs.begin();
-       for (; input_iter != phys_audio_inputs.end(); ++input_iter) {
-        
-               PortState state(*input_iter);
+
+       std::vector<std::string>::const_iterator input_iter = phys_audio_inputs.begin ();
+       for (; input_iter != phys_audio_inputs.end (); ++input_iter) {
+
+               PortState state (*input_iter);
                state.active = true;
-               PortStateList::const_iterator found_state_iter = std::find(input_states.begin(), input_states.end(), state);
-        
-               if (found_state_iter != input_states.end()) {
-                       new_input_states.push_back(*found_state_iter);
+               PortStateList::const_iterator found_state_iter = std::find (input_states.begin (), input_states.end (), state);
+
+               if (found_state_iter != input_states.end ()) {
+                       new_input_states.push_back (*found_state_iter);
                } else {
-                       new_input_states.push_back(state);
+                       new_input_states.push_back (state);
                }
        }
        _current_state->input_channel_states = new_input_states;
-    
+
        // update audio output states (multi out mode)
        std::vector<std::string> phys_audio_outputs;
-       backend->get_physical_outputs(DataType::AUDIO, phys_audio_outputs);
-    
+       backend->get_physical_outputs (DataType::AUDIO, phys_audio_outputs);
+
        PortStateList new_output_states;
        PortStateList &output_multi_states = _current_state->multi_out_channel_states;
-    
-       std::vector<std::string>::const_iterator output_iter = phys_audio_outputs.begin();
-       for (; output_iter != phys_audio_outputs.end(); ++output_iter) {
-        
-               PortState state(*output_iter);
+
+       std::vector<std::string>::const_iterator output_iter = phys_audio_outputs.begin ();
+       for (; output_iter != phys_audio_outputs.end (); ++output_iter) {
+
+               PortState state (*output_iter);
                state.active = true;
-               PortStateList::const_iterator found_state_iter = std::find(output_multi_states.begin(), output_multi_states.end(), state);
-        
-               if (found_state_iter != output_multi_states.end()) {
-                       new_output_states.push_back(*found_state_iter);
+               PortStateList::const_iterator found_state_iter = std::find (output_multi_states.begin (), output_multi_states.end (), state);
+
+               if (found_state_iter != output_multi_states.end ()) {
+                       new_output_states.push_back (*found_state_iter);
                } else {
-                       new_output_states.push_back(state);
+                       new_output_states.push_back (state);
                }
        }
-    
+
        _current_state->multi_out_channel_states = new_output_states;
-    
+
        // update audio output states (stereo out mode)
-       new_output_states.clear();
+       new_output_states.clear ();
        PortStateList &output_stereo_states = _current_state->stereo_out_channel_states;
-    
-       output_iter = phys_audio_outputs.begin();
-       for (; output_iter != phys_audio_outputs.end(); ++output_iter) {
-        
-               PortState state(*output_iter);
+
+       output_iter = phys_audio_outputs.begin ();
+       for (; output_iter != phys_audio_outputs.end (); ++output_iter) {
+
+               PortState state (*output_iter);
                state.active = true;
-               PortStateList::const_iterator found_state_iter = std::find(output_stereo_states.begin(), output_stereo_states.end(), state);
-        
-               if (found_state_iter != output_stereo_states.end()) {
-                       new_output_states.push_back(*found_state_iter);
+               PortStateList::const_iterator found_state_iter = std::find (output_stereo_states.begin (), output_stereo_states.end (), state);
+
+               if (found_state_iter != output_stereo_states.end ()) {
+                       new_output_states.push_back (*found_state_iter);
                } else {
-                       new_output_states.push_back(state);
+                       new_output_states.push_back (state);
                }
        }
 
        _current_state->stereo_out_channel_states = new_output_states;
-       _refresh_stereo_out_channel_states();
-    
-    
+       _refresh_stereo_out_channel_states ();
+
+
        // update midi ports: unlike audio ports which states are saved per device
        // each midi port state is saved individualy
        // so get all midi ports from the backend
@@ -1531,82 +1618,82 @@ EngineStateController::_update_device_channels_state()
        // if physical port is new, add it to our state list
        // if physical port is present in our state list - mark it available
        // if there is no corresponding physical port to one we have in a list - leave it unavailable
-       MidiPortStateList::iterator iter = _midi_inputs.begin();
-       for (; iter != _midi_inputs.end(); ++iter) {
+       MidiPortStateList::iterator iter = _midi_inputs.begin ();
+       for (; iter != _midi_inputs.end (); ++iter) {
                iter->available = false;
        }
-    
-       for (iter = _midi_outputs.begin(); iter != _midi_outputs.end(); ++iter) {
+
+       for (iter = _midi_outputs.begin (); iter != _midi_outputs.end (); ++iter) {
                iter->available = false;
        }
-    
+
        // update midi input ports
        std::vector<std::string> phys_midi_inputs;
-       backend->get_physical_inputs(DataType::MIDI, phys_midi_inputs);
-    
-       std::vector<std::string>::const_iterator midi_input_iter = phys_midi_inputs.begin();
-       for (; midi_input_iter != phys_midi_inputs.end(); ++midi_input_iter) {
-        
-               MidiPortState state(*midi_input_iter);
+       backend->get_physical_inputs (DataType::MIDI, phys_midi_inputs);
+
+       std::vector<std::string>::const_iterator midi_input_iter = phys_midi_inputs.begin ();
+       for (; midi_input_iter != phys_midi_inputs.end (); ++midi_input_iter) {
+
+               MidiPortState state (*midi_input_iter);
                state.active = false;
                state.available = true;
-               MidiPortStateList::iterator found_state_iter = std::find(_midi_inputs.begin(), _midi_inputs.end(), state);
-        
-               if (found_state_iter != _midi_inputs.end()) {
+               MidiPortStateList::iterator found_state_iter = std::find (_midi_inputs.begin (), _midi_inputs.end (), state);
+
+               if (found_state_iter != _midi_inputs.end ()) {
                        found_state_iter->available = true;
                } else {
-                       _midi_inputs.push_back(state);
+                       _midi_inputs.push_back (state);
                }
        }
-    
+
        // update midi output ports
        std::vector<std::string> phys_midi_outputs;
-       backend->get_physical_outputs(DataType::MIDI, phys_midi_outputs);
-    
-       std::vector<std::string>::const_iterator midi_output_iter = phys_midi_outputs.begin();
-       for (; midi_output_iter != phys_midi_outputs.end(); ++midi_output_iter) {
-        
-               MidiPortState state(*midi_output_iter);
+       backend->get_physical_outputs (DataType::MIDI, phys_midi_outputs);
+
+       std::vector<std::string>::const_iterator midi_output_iter = phys_midi_outputs.begin ();
+       for (; midi_output_iter != phys_midi_outputs.end (); ++midi_output_iter) {
+
+               MidiPortState state (*midi_output_iter);
                state.active = false;
                state.available = true;
-               MidiPortStateList::iterator found_state_iter = std::find(_midi_outputs.begin(), _midi_outputs.end(), state);
-        
-               if (found_state_iter != _midi_outputs.end()) {
+               MidiPortStateList::iterator found_state_iter = std::find (_midi_outputs.begin (), _midi_outputs.end (), state);
+
+               if (found_state_iter != _midi_outputs.end ()) {
                        found_state_iter->available = true;
                } else {
-                       _midi_outputs.push_back(state);
+                       _midi_outputs.push_back (state);
                }
        }
 }
 
 
 void
-EngineStateController::_refresh_stereo_out_channel_states()
+EngineStateController::_refresh_stereo_out_channel_states ()
 {
        PortStateList &output_states = _current_state->stereo_out_channel_states;
-       PortStateList::iterator active_iter = output_states.begin();
+       PortStateList::iterator active_iter = output_states.begin ();
 
-       for (; active_iter != output_states.end(); ++active_iter) {
+       for (; active_iter != output_states.end (); ++active_iter) {
                if (active_iter->active) {
                        break;
                }
        }
-    
+
        uint32_t pending_active_channels = 2;
-       PortStateList::iterator iter = output_states.begin();
+       PortStateList::iterator iter = output_states.begin ();
        // if found active
-       if (active_iter != output_states.end()) {
+       if (active_iter != output_states.end ()) {
                iter = active_iter;
-               if (++iter == output_states.end()) {
-                       iter = output_states.begin();
+               if (++iter == output_states.end ()) {
+                       iter = output_states.begin ();
                }
-            
+
                (iter++)->active = true;
                pending_active_channels = 0;
        }
 
        // drop the rest of the states to false (until we reach the end or first existing active channel)
-       for (; iter != output_states.end() && iter != active_iter; ++iter) {
+       for (; iter != output_states.end () && iter != active_iter; ++iter) {
                if (pending_active_channels) {
                        iter->active = true;
                        --pending_active_channels;
@@ -1620,34 +1707,34 @@ EngineStateController::_refresh_stereo_out_channel_states()
 void
 EngineStateController::_on_engine_running ()
 {
-       AudioEngine::instance()->reconnect_session_routes(true, true);
+       AudioEngine::instance ()->reconnect_session_routes (true, true);
        _current_state->active = true;
-    
-       EngineRunning(); // emit a signal
+
+       EngineRunning (); // emit a signal
 }
 
 
 void
 EngineStateController::_on_engine_stopped ()
 {
-       EngineStopped();
+       EngineStopped ();
 }
 
 
 void
 EngineStateController::_on_engine_halted ()
 {
-       EngineHalted();
+       EngineHalted ();
 }
 
 
 void
-EngineStateController::_on_device_error()
+EngineStateController::_on_device_error ()
 {
        set_new_device_as_current ("None");
-       push_current_state_to_backend(true);
-       DeviceListChanged(false);
-       DeviceError();
+       push_current_state_to_backend (true);
+       DeviceListChanged (false);
+       DeviceError ();
 }
 
 
@@ -1655,10 +1742,10 @@ void
 EngineStateController::_on_parameter_changed (const std::string& parameter_name)
 {
        if (parameter_name == "output-auto-connect") {
-        
-               AudioEngine::instance()->reconnect_session_routes(false, true);
-               OutputConfigChanged(); // emit a signal
-               OutputConnectionModeChanged(); // emit signal
+
+               AudioEngine::instance ()->reconnect_session_routes (false, true);
+               OutputConfigChanged (); // emit a signal
+               OutputConnectionModeChanged (); // emit signal
        }
 }
 
@@ -1666,101 +1753,155 @@ EngineStateController::_on_parameter_changed (const std::string& parameter_name)
 void
 EngineStateController::_on_ports_registration_update ()
 {
-       _update_device_channels_state();
-    
+       _update_device_channels_state ();
+
        // update MIDI connections
        if (_session) {
                _session->reconnect_midi_scene_ports (true);
                _session->reconnect_midi_scene_ports (false);
-        
+
                _session->reconnect_mtc_ports ();
-        
+
                _session->reconnect_mmc_ports (true);
                _session->reconnect_mmc_ports (false);
+
+               _session->reconnect_ltc_input ();
+               _session->reconnect_ltc_output ();
        }
-    
-       PortRegistrationChanged(); // emit a signal
+
+       _update_ltc_source_port ();
+       _update_ltc_output_port ();
+
+       PortRegistrationChanged (); // emit a signal
 }
 
 
 bool
-EngineStateController::push_current_state_to_backend(bool start)
+EngineStateController::push_current_state_to_backend (bool start)
 {
-       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance()->current_backend();
-       
+       boost::shared_ptr<AudioBackend> backend = AudioEngine::instance ()->current_backend ();
+
        if (!backend) {
                return false;
        }
-    
+
        // check if anything changed
-       bool state_changed = (_current_state->device_name != backend->device_name()) ||
-               (_current_state->sample_rate != backend->sample_rate()) ||
-               (_current_state->buffer_size != backend->buffer_size());
-    
-       bool was_running = AudioEngine::instance()->running();
-    
-       Glib::Threads::RecMutex::Lock sl (AudioEngine::instance()->state_lock());
+       bool state_changed = (_current_state->device_name != backend->device_name ()) ||
+               (_current_state->sample_rate != backend->sample_rate ()) ||
+               (_current_state->buffer_size != backend->buffer_size ());
+
+       bool was_running = AudioEngine::instance ()->running ();
+
+       Glib::Threads::RecMutex::Lock sl (AudioEngine::instance ()->state_lock ());
        if (state_changed) {
 
                if (was_running) {
-                       if (AudioEngine::instance()->stop ()) {
+
+                       if (_current_state->device_name != backend->device_name ()) {
+                               // device has been changed
+                               // the list of ports has been changed too
+                               // current ltc_source_port and ltc_output_port aren't available
+                               set_ltc_source_port ("");
+                               set_ltc_output_port ("");
+                       }
+
+                       if (AudioEngine::instance ()->stop ()) {
                                return false;
                        }
                }
 
                int result = 0;
-
                {
                        std::cout << "EngineStateController::Setting device: " << _current_state->device_name << std::endl;
-                       if ((_current_state->device_name != backend->device_name()) && (result = backend->set_device_name (_current_state->device_name))) {
-                               error << string_compose (_("Cannot set device name to %1"), get_current_device_name()) << endmsg;
+                       if ((_current_state->device_name != backend->device_name ()) && (result = backend->set_device_name (_current_state->device_name))) {
+                               error << string_compose (_("Cannot set device name to %1"), get_current_device_name ()) << endmsg;
                        }
-        
+
                        if (!result ) {
                                std::cout << "EngineStateController::Setting device sample rate " << _current_state->sample_rate << std::endl;
                                result = backend->set_sample_rate (_current_state->sample_rate);
-                               
+
                                if (result) {
-                                       error << string_compose (_("Cannot set sample rate to %1"), get_current_sample_rate()) << endmsg;
+                                       error << string_compose (_("Cannot set sample rate to %1"), get_current_sample_rate ()) << endmsg;
                                }
                        }
-        
+
                        if (!result ) {
                                std::cout << "EngineStateController::Setting device buffer size " << _current_state->buffer_size << std::endl;
                                result = backend->set_buffer_size (_current_state->buffer_size);
 
                                if (result) {
-                                       error << string_compose (_("Cannot set buffer size to %1"), get_current_buffer_size()) << endmsg;
+                                       error << string_compose (_("Cannot set buffer size to %1"), get_current_buffer_size ()) << endmsg;
                                }
                        }
                }
-        
-               if (result) { // error during device setup
+
+               if (result) // error during device setup
+               {
                        //switch to None device and notify about the issue
                        set_new_device_as_current ("None");
-                       DeviceListChanged(false);
-                       DeviceError();
+                       DeviceListChanged (false);
+                       DeviceError ();
                }
 
-               if (AudioEngine::instance()->backend_reset_requested()) {
+               if (AudioEngine::instance ()->backend_reset_requested ()) {
                        // device asked for reset, do not start engine now
                        // free sate lock and let Engine reset the device as it's required
                        return true;
                }
        }
-    
+
        if (start || (was_running && state_changed)) {
-               if (AudioEngine::instance()->start () && !AudioEngine::instance()->is_reset_requested()) {
+               if (AudioEngine::instance ()->start () && !AudioEngine::instance ()->is_reset_requested ()) {
                        //switch to None device and notify about the issue
                        set_new_device_as_current ("None");
-                       AudioEngine::instance()->start ();
-                       DeviceListChanged(false);
-                       DeviceError();
+                       AudioEngine::instance ()->start ();
+                       DeviceListChanged (false);
+                       DeviceError ();
                        return false;
                }
        }
-    
-       save_audio_midi_settings();
-    
+
+       save_audio_midi_settings ();
+
        return true;
 }
+
+
+std::string
+EngineStateController::get_mtc_source_port ()
+{
+       MidiPortStateList::const_iterator state_iter = _midi_inputs.begin ();
+       for (; state_iter != _midi_inputs.end (); ++state_iter) {
+               if (state_iter->available && state_iter->mtc_in) {
+                       return (state_iter->name);
+               }
+       }
+
+       return "";
+}
+
+void
+EngineStateController::set_ltc_source_port (const std::string& port)
+{
+       Config->set_ltc_source_port (port);
+}
+
+std::string
+EngineStateController::get_ltc_source_port ()
+{
+       return Config->get_ltc_source_port ();
+}
+
+void
+EngineStateController::set_ltc_output_port (const std::string& port)
+{
+       Config->set_ltc_output_port (port);
+}
+
+std::string
+EngineStateController::get_ltc_output_port ()
+{
+       return Config->get_ltc_output_port ();
+}
+