initialize ltc_enc_buf to 0 to fix crash in ltc_tx_cleanup at startup
[ardour.git] / libs / ardour / session.cc
index 062d07ec2609f6b5e08e777d63ee8778f0cfd8e7..914c6a9a77de28bd42aecf336841bf55e9f08609 100644 (file)
@@ -30,7 +30,7 @@
 #include <unistd.h>
 #include <limits.h>
 
-#include <glibmm/thread.h>
+#include <glibmm/threads.h>
 #include <glibmm/miscutils.h>
 #include <glibmm/fileutils.h>
 
@@ -119,6 +119,7 @@ PBD::Signal1<int,boost::shared_ptr<Playlist> > Session::AskAboutPlaylistDeletion
 PBD::Signal0<void> Session::Quit;
 PBD::Signal0<void> Session::FeedbackDetected;
 PBD::Signal0<void> Session::SuccessfulGraphSort;
+PBD::Signal2<void,std::string,std::string> Session::VersionMismatch;
 
 static void clean_up_session_event (SessionEvent* ev) { delete ev; }
 const SessionEvent::RTeventCallback Session::rt_cleanup (clean_up_session_event);
@@ -132,12 +133,14 @@ Session::Session (AudioEngine &eng,
        : _engine (eng)
        , _target_transport_speed (0.0)
        , _requested_return_frame (-1)
+       , _under_nsm_control (false)
        , _session_dir (new SessionDirectory(fullpath))
        , state_tree (0)
        , _state_of_the_state (Clean)
        , _butler (new Butler (*this))
        , _post_transport_work (0)
        , _send_timecode_update (false)
+       , ltc_enc_buf(0)
        , _all_route_group (new RouteGroup (*this, "all"))
        , routes (new RouteList)
        , _total_free_4k_blocks (0)
@@ -145,7 +148,6 @@ Session::Session (AudioEngine &eng,
        , _bundles (new BundleList)
        , _bundle_xml_node (0)
        , _current_trans (0)
-       , _click_io ((IO*) 0)
        , click_data (0)
        , click_emphasis_data (0)
        , main_outs (0)
@@ -153,6 +155,7 @@ Session::Session (AudioEngine &eng,
        , _suspend_timecode_transmission (0)
 {
        _locations = new Locations (*this);
+       ltc_encoder = NULL;
 
        if (how_many_dsp_threads () > 1) {
                /* For now, only create the graph if we are using >1 DSP threads, as
@@ -230,6 +233,10 @@ Session::destroy ()
 
        _state_of_the_state = StateOfTheState (CannotSave|Deletion);
 
+       /* disconnect from any and all signals that we are connected to */
+
+       drop_connections ();
+
        _engine.remove_session ();
 
        /* deregister all ports - there will be no process or any other
@@ -238,6 +245,8 @@ Session::destroy ()
 
        Port::PortDrop (); /* EMIT SIGNAL */
 
+       ltc_tx_cleanup();
+
        /* clear history so that no references to objects are held any more */
 
        _history.clear ();
@@ -364,6 +373,36 @@ Session::when_engine_running ()
 
        try {
                XMLNode* child = 0;
+               
+               _ltc_input.reset (new IO (*this, _("LTC In"), IO::Input));
+               _ltc_output.reset (new IO (*this, _("LTC Out"), IO::Output));
+
+               if (state_tree && (child = find_named_node (*state_tree->root(), "LTC-In")) != 0) {
+                       _ltc_input->set_state (*(child->children().front()), Stateful::loading_state_version);
+               } else {
+                       {
+                               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+                               _ltc_input->ensure_io (ChanCount (DataType::AUDIO, 1), true, this);
+                       }
+                       reconnect_ltc_input ();
+               }
+
+               if (state_tree && (child = find_named_node (*state_tree->root(), "LTC-Out")) != 0) {
+                       _ltc_output->set_state (*(child->children().front()), Stateful::loading_state_version);
+               } else {
+                       {
+                               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+                               _ltc_output->ensure_io (ChanCount (DataType::AUDIO, 1), true, this);
+                       }
+                       reconnect_ltc_output ();
+               }
+                                               
+               /* fix up names of LTC ports because we don't want the normal
+                * IO style of NAME/TYPE-{in,out}N
+                */
+               
+               _ltc_input->nth (0)->set_name (_("LTC-in"));
+               _ltc_output->nth (0)->set_name (_("LTC-out"));
 
                _click_io.reset (new ClickIO (*this, "click"));
                _click_gain.reset (new Amp (*this));
@@ -560,7 +599,7 @@ Session::when_engine_running ()
        ControlProtocolManager::instance().midi_connectivity_established ();
 
        if (_is_new && !no_auto_connect()) {
-               Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock());
+               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock());
                auto_connect_master_bus ();
        }
 
@@ -574,6 +613,7 @@ Session::when_engine_running ()
 
        BootMessage (_("Connect to engine"));
        _engine.set_session (this);
+       _engine.reset_timebase ();
 }
 
 void
@@ -625,7 +665,7 @@ Session::remove_monitor_section ()
                 * pieces of audio as we work on each route.
                 */
                
-               Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
                
                /* Connect tracks to monitor section. Note that in an
                   existing session, the internal sends will already exist, but we want the
@@ -671,7 +711,7 @@ Session::add_monitor_section ()
        // boost_debug_shared_ptr_mark_interesting (r.get(), "Route");
 #endif
        {
-               Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
                r->input()->ensure_io (_master_out->output()->n_ports(), false, this);
                r->output()->ensure_io (_master_out->output()->n_ports(), false, this);
        }
@@ -724,7 +764,7 @@ Session::add_monitor_section ()
                        boost::shared_ptr<Bundle> b = bundle_by_name (Config->get_monitor_bus_preferred_bundle());
                        
                        if (b) {
-                               _monitor_out->output()->connect_ports_to_bundle (b, this);
+                               _monitor_out->output()->connect_ports_to_bundle (b, true, this);
                        } else {
                                warning << string_compose (_("The preferred I/O for the monitor bus (%1) cannot be found"),
                                                           Config->get_monitor_bus_preferred_bundle())
@@ -772,7 +812,7 @@ Session::add_monitor_section ()
         * pieces of audio as we work on each route.
         */
         
-       Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+       Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 
        /* Connect tracks to monitor section. Note that in an
           existing session, the internal sends will already exist, but we want the
@@ -1040,7 +1080,7 @@ Session::set_auto_loop_location (Location* location)
        }
 
        if (location->end() <= location->start()) {
-               error << _("Session: you can't use a mark for auto loop") << endmsg;
+               error << _("You cannot use this location for auto-loop because it has zero or negative length") << endmsg;
                return;
        }
 
@@ -1304,8 +1344,6 @@ Session::set_frame_rate (framecnt_t frames_per_second)
 
        sync_time_vars();
 
-       Automatable::set_automation_interval (ceil ((double) frames_per_second * (0.001 * Config->get_automation_interval())));
-
        clear_clicks ();
 
        // XXX we need some equivalent to this, somehow
@@ -1561,7 +1599,7 @@ Session::find_route_name (string const & base, uint32_t& id, char* name, size_t
                }
 
                ++id;
-
+               
        } while (id < (UINT_MAX-1));
 
        return false;
@@ -1578,7 +1616,7 @@ Session::count_existing_track_channels (ChanCount& in, ChanCount& out)
 
        for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
                 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
-               if (tr && !tr->is_hidden()) {
+               if (tr && !tr->is_auditioner()) {
                        in  += tr->n_inputs();
                        out += tr->n_outputs();
                }
@@ -1599,8 +1637,6 @@ Session::new_midi_track (const ChanCount& input, const ChanCount& output, boost:
        RouteList new_routes;
        list<boost::shared_ptr<MidiTrack> > ret;
 
-       cerr << "Adding MIDI track with in = " << input << " out = " << output << endl;
-
        bool const use_number = (how_many != 1) || name_template.empty () || name_template == _("MIDI");
 
        while (how_many) {
@@ -1624,7 +1660,7 @@ Session::new_midi_track (const ChanCount& input, const ChanCount& output, boost:
                        // boost_debug_shared_ptr_mark_interesting (track.get(), "Track");
 #endif
                        {
-                               Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+                               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
                                if (track->input()->ensure_io (input, false, this)) {
                                        error << "cannot configure " << input << " out configuration for new midi track" << endmsg;     
                                        goto failed;
@@ -1659,7 +1695,7 @@ Session::new_midi_track (const ChanCount& input, const ChanCount& output, boost:
 
                catch (AudioEngine::PortRegistrationFailure& pfe) {
 
-                       error << string_compose (_("No more JACK ports are available. You will need to stop %1 and restart JACK with ports if you need this many tracks."), PROGRAM_NAME) << endmsg;
+                       error << string_compose (_("No more JACK ports are available. You will need to stop %1 and restart JACK with more ports if you need this many tracks."), PROGRAM_NAME) << endmsg;
                        goto failed;
                }
 
@@ -1724,7 +1760,7 @@ Session::auto_connect_route (boost::shared_ptr<Route> route, ChanCount& existing
                return;
        }
 
-       Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock (), Glib::NOT_LOCK);
+       Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock (), Glib::Threads::NOT_LOCK);
 
        if (with_lock) {
                lm.acquire ();
@@ -1859,7 +1895,7 @@ Session::new_audio_track (int input_channels, int output_channels, TrackMode mod
                        // boost_debug_shared_ptr_mark_interesting (track.get(), "Track");
 #endif
                        {
-                               Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+                               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 
                                if (track->input()->ensure_io (ChanCount(DataType::AUDIO, input_channels), false, this)) {
                                        error << string_compose (
@@ -1945,7 +1981,7 @@ Session::new_audio_route (int input_channels, int output_channels, RouteGroup* r
                        // boost_debug_shared_ptr_mark_interesting (bus.get(), "Route");
 #endif
                        {
-                               Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+                               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 
                                if (bus->input()->ensure_io (ChanCount(DataType::AUDIO, input_channels), false, this)) {
                                        error << string_compose (_("cannot configure %1 in/%2 out configuration for new audio track"),
@@ -1973,6 +2009,8 @@ Session::new_audio_route (int input_channels, int output_channels, RouteGroup* r
                        bus->add_internal_return ();
 
                        ret.push_back (bus);
+                       
+                       ARDOUR::GUIIdle ();
                }
 
 
@@ -2000,12 +2038,13 @@ Session::new_audio_route (int input_channels, int output_channels, RouteGroup* r
 }
 
 RouteList
-Session::new_route_from_template (uint32_t how_many, const std::string& template_path)
+Session::new_route_from_template (uint32_t how_many, const std::string& template_path, const std::string& name_base)
 {
        RouteList ret;
        uint32_t control_id;
        XMLTree tree;
        uint32_t number = 0;
+       const uint32_t being_added = how_many;
 
        if (!tree.read (template_path.c_str())) {
                return ret;
@@ -2025,13 +2064,29 @@ Session::new_route_from_template (uint32_t how_many, const std::string& template
                node_copy.remove_property_recursively (X_("id"));
 
                try {
-                       string const route_name = node_copy.property(X_("name"))->value ();
-                       
-                       /* generate a new name by adding a number to the end of the template name */
                        char name[32];
-                       if (!find_route_name (route_name.c_str(), ++number, name, sizeof(name), true)) {
-                               fatal << _("Session: UINT_MAX routes? impossible!") << endmsg;
-                               /*NOTREACHED*/
+
+                       if (!name_base.empty()) {
+
+                               /* if we're adding more than one routes, force
+                                * all the names of the new routes to be
+                                * numbered, via the final parameter.
+                                */
+
+                               if (!find_route_name (name_base.c_str(), ++number, name, sizeof(name), (being_added > 1))) {
+                                       fatal << _("Session: UINT_MAX routes? impossible!") << endmsg;
+                                       /*NOTREACHDE*/
+                               }
+
+                       } else {
+
+                               string const route_name  = node_copy.property(X_("name"))->value ();
+                       
+                               /* generate a new name by adding a number to the end of the template name */
+                               if (!find_route_name (route_name.c_str(), ++number, name, sizeof(name), true)) {
+                                       fatal << _("Session: UINT_MAX routes? impossible!") << endmsg;
+                                       /*NOTREACHED*/
+                               }
                        }
 
                        /* set this name in the XML description that we are about to use */
@@ -2061,7 +2116,7 @@ Session::new_route_from_template (uint32_t how_many, const std::string& template
                                   loading this normally happens in a different way.
                                */
 
-                               Glib::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
+                               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 
                                IOChange change (IOChange::Type (IOChange::ConfigurationChanged | IOChange::ConnectionsChanged));
                                change.after = route->input()->n_ports();
@@ -2100,6 +2155,31 @@ Session::new_route_from_template (uint32_t how_many, const std::string& template
 
 void
 Session::add_routes (RouteList& new_routes, bool input_auto_connect, bool output_auto_connect, bool save)
+{
+       try {
+               PBD::Unwinder<bool> aip (_adding_routes_in_progress, true);
+               add_routes_inner (new_routes, input_auto_connect, output_auto_connect);
+
+       } catch (...) {
+               error << _("Adding new tracks/busses failed") << endmsg;
+       }
+
+       graph_reordered ();
+
+       update_latency (true);
+       update_latency (false);
+               
+       set_dirty();
+       
+       if (save) {
+               save_state (_current_snapshot_name);
+       }
+       
+       RouteAdded (new_routes); /* EMIT SIGNAL */
+}
+
+void
+Session::add_routes_inner (RouteList& new_routes, bool input_auto_connect, bool output_auto_connect)
 {
         ChanCount existing_inputs;
         ChanCount existing_outputs;
@@ -2156,6 +2236,7 @@ Session::add_routes (RouteList& new_routes, bool input_auto_connect, bool output
                        }
                }
 
+
                if (input_auto_connect || output_auto_connect) {
                        auto_connect_route (r, existing_inputs, existing_outputs, true, input_auto_connect);
                }
@@ -2164,9 +2245,9 @@ Session::add_routes (RouteList& new_routes, bool input_auto_connect, bool output
                   reasonable defaults because they also affect the remote control
                   ID in most situations.
                */
-               
+
                if (!r->has_order_key (EditorSort)) {
-                       if (r->is_hidden()) {
+                       if (r->is_auditioner()) {
                                /* use an arbitrarily high value */
                                r->set_order_key (EditorSort, UINT_MAX);
                                r->set_order_key (MixerSort, UINT_MAX);
@@ -2177,35 +2258,23 @@ Session::add_routes (RouteList& new_routes, bool input_auto_connect, bool output
                                order++;
                        }
                }
+
+               ARDOUR::GUIIdle ();
        }
 
        if (_monitor_out && IO::connecting_legal) {
-
-               {
-                       Glib::Mutex::Lock lm (_engine.process_lock());          
-                       
-                       for (RouteList::iterator x = new_routes.begin(); x != new_routes.end(); ++x) {
-                               if ((*x)->is_monitor()) {
-                                       /* relax */
-                               } else if ((*x)->is_master()) {
+               Glib::Threads::Mutex::Lock lm (_engine.process_lock());         
+               
+               for (RouteList::iterator x = new_routes.begin(); x != new_routes.end(); ++x) {
+                       if ((*x)->is_monitor()) {
+                               /* relax */
+                       } else if ((*x)->is_master()) {
                                        /* relax */
-                               } else {
-                                       (*x)->enable_monitor_send ();
-                               }
+                       } else {
+                               (*x)->enable_monitor_send ();
                        }
                }
-
-               resort_routes ();
-       }
-
-       set_dirty();
-
-       if (save) {
-               save_state (_current_snapshot_name);
        }
-
-       RouteAdded (new_routes); /* EMIT SIGNAL */
-       Route::RemoteControlIDChange (); /* EMIT SIGNAL */
 }
 
 void
@@ -2403,7 +2472,7 @@ Session::route_listen_changed (void* /*src*/, boost::weak_ptr<Route> wpr)
                        /* new listen: disable all other listen */
                        boost::shared_ptr<RouteList> r = routes.reader ();
                        for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
-                               if ((*i) == route || (*i)->solo_isolated() || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_hidden()) {
+                               if ((*i) == route || (*i)->solo_isolated() || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_auditioner()) {
                                        continue;
                                }
                                (*i)->set_listen (false, this);
@@ -2485,7 +2554,7 @@ Session::route_solo_changed (bool self_solo_change, void* /*src*/, boost::weak_p
                /* new solo: disable all other solos, but not the group if its solo-enabled */
 
                for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
-                       if ((*i) == route || (*i)->solo_isolated() || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_hidden() ||
+                       if ((*i) == route || (*i)->solo_isolated() || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_auditioner() ||
                            (leave_group_alone && ((*i)->route_group() == rg))) {
                                continue;
                        }
@@ -2505,7 +2574,7 @@ Session::route_solo_changed (bool self_solo_change, void* /*src*/, boost::weak_p
                bool via_sends_only;
                bool in_signal_flow;
 
-               if ((*i) == route || (*i)->solo_isolated() || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_hidden() ||
+               if ((*i) == route || (*i)->solo_isolated() || (*i)->is_master() || (*i)->is_monitor() || (*i)->is_auditioner() ||
                    (leave_group_alone && ((*i)->route_group() == rg))) {
                        continue;
                }
@@ -2515,14 +2584,17 @@ Session::route_solo_changed (bool self_solo_change, void* /*src*/, boost::weak_p
                DEBUG_TRACE (DEBUG::Solo, string_compose ("check feed from %1\n", (*i)->name()));
                
                if ((*i)->feeds (route, &via_sends_only)) {
+                       DEBUG_TRACE (DEBUG::Solo, string_compose ("\tthere is a feed from %1\n", (*i)->name()));
                        if (!via_sends_only) {
                                if (!route->soloed_by_others_upstream()) {
                                        (*i)->mod_solo_by_others_downstream (delta);
                                }
+                       } else {
+                               DEBUG_TRACE (DEBUG::Solo, string_compose ("\tthere is a send-only feed from %1\n", (*i)->name()));
                        }
                        in_signal_flow = true;
                } else {
-                       DEBUG_TRACE (DEBUG::Solo, "\tno feed from\n");
+                       DEBUG_TRACE (DEBUG::Solo, string_compose ("\tno feed from %1\n", (*i)->name()));
                }
                
                DEBUG_TRACE (DEBUG::Solo, string_compose ("check feed to %1\n", (*i)->name()));
@@ -2543,7 +2615,11 @@ Session::route_solo_changed (bool self_solo_change, void* /*src*/, boost::weak_p
                                if (!route->soloed_by_others_downstream()) {
                                        DEBUG_TRACE (DEBUG::Solo, string_compose ("\tmod %1 by %2\n", (*i)->name(), delta));
                                        (*i)->mod_solo_by_others_upstream (delta);
+                               } else {
+                                       DEBUG_TRACE (DEBUG::Solo, "\talready soloed by others downstream\n");
                                }
+                       } else {
+                               DEBUG_TRACE (DEBUG::Solo, string_compose ("\tfeed to %1 ignored, sends-only\n", (*i)->name()));
                        }
                        in_signal_flow = true;
                } else {
@@ -2565,7 +2641,7 @@ Session::route_solo_changed (bool self_solo_change, void* /*src*/, boost::weak_p
        */
 
        for (RouteList::iterator i = uninvolved.begin(); i != uninvolved.end(); ++i) {
-               DEBUG_TRACE (DEBUG::Solo, string_compose ("mute change for %1\n", (*i)->name()));
+               DEBUG_TRACE (DEBUG::Solo, string_compose ("mute change for %1, which neither feeds or is fed by %2\n", (*i)->name(), route->name()));
                (*i)->mute_changed (this);
        }
 
@@ -2587,11 +2663,11 @@ Session::update_route_solo_state (boost::shared_ptr<RouteList> r)
        }
 
        for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
-               if (!(*i)->is_master() && !(*i)->is_monitor() && !(*i)->is_hidden() && (*i)->self_soloed()) {
+               if (!(*i)->is_master() && !(*i)->is_monitor() && !(*i)->is_auditioner() && (*i)->self_soloed()) {
                        something_soloed = true;
                }
 
-               if (!(*i)->is_hidden() && (*i)->listening_via_monitor()) {
+               if (!(*i)->is_auditioner() && (*i)->listening_via_monitor()) {
                        if (Config->get_solo_control_is_listen_control()) {
                                listeners++;
                        } else {
@@ -2615,6 +2691,9 @@ Session::update_route_solo_state (boost::shared_ptr<RouteList> r)
                _solo_isolated_cnt = isolated;
                IsolatedChanged (); /* EMIT SIGNAL */
        }
+
+       DEBUG_TRACE (DEBUG::Solo, string_compose ("solo state updated by session, soloed? %1 listeners %2 isolated %3\n",
+                                                 something_soloed, listeners, isolated));
 }
 
 boost::shared_ptr<RouteList>
@@ -2650,44 +2729,68 @@ Session::io_name_is_legal (const std::string& name)
 }
 
 void
-Session::set_exclusive_input_active (boost::shared_ptr<Route> rt, bool /*others_on*/)
+Session::set_exclusive_input_active (boost::shared_ptr<RouteList> rl, bool onoff, bool flip_others)
 {
-       RouteList rl;
+       RouteList rl2;
        vector<string> connections;
 
-       PortSet& ps (rt->input()->ports());
-
-       for (PortSet::iterator p = ps.begin(); p != ps.end(); ++p) {
-               p->get_connections (connections);
-       }
+       /* if we are passed only a single route and we're not told to turn
+        * others off, then just do the simple thing.
+        */
 
-       for (vector<string>::iterator s = connections.begin(); s != connections.end(); ++s) {
-               routes_using_input_from (*s, rl);
+       if (flip_others == false && rl->size() == 1) {
+               boost::shared_ptr<MidiTrack> mt = boost::dynamic_pointer_cast<MidiTrack> (rl->front());
+               if (mt) {
+                       mt->set_input_active (onoff);
+                       return;
+               }
        }
 
-       /* scan all relevant routes to see if others are on or off */
+       for (RouteList::iterator rt = rl->begin(); rt != rl->end(); ++rt) {
 
-       bool others_are_already_on = false;
+               PortSet& ps ((*rt)->input()->ports());
+               
+               for (PortSet::iterator p = ps.begin(); p != ps.end(); ++p) {
+                       p->get_connections (connections);
+               }
+               
+               for (vector<string>::iterator s = connections.begin(); s != connections.end(); ++s) {
+                       routes_using_input_from (*s, rl2);
+               }
+               
+               /* scan all relevant routes to see if others are on or off */
+               
+               bool others_are_already_on = false;
+               
+               for (RouteList::iterator r = rl2.begin(); r != rl2.end(); ++r) {
 
-       for (RouteList::iterator r = rl.begin(); r != rl.end(); ++r) {
-               if ((*r) != rt) {
                        boost::shared_ptr<MidiTrack> mt = boost::dynamic_pointer_cast<MidiTrack> (*r);
-                       if (mt) {
+
+                       if (!mt) {
+                               continue;
+                       }
+
+                       if ((*r) != (*rt)) {
                                if (mt->input_active()) {
                                        others_are_already_on = true;
-                                       break;
                                }
+                       } else {
+                               /* this one needs changing */
+                               mt->set_input_active (onoff);
                        }
                }
-       }
-
-       /* globally reverse other routes */
+               
+               if (flip_others) {
 
-       for (RouteList::iterator r = rl.begin(); r != rl.end(); ++r) {
-               if ((*r) != rt) {
-                       boost::shared_ptr<MidiTrack> mt = boost::dynamic_pointer_cast<MidiTrack> (*r);
-                       if (mt) {
-                               mt->set_input_active (!others_are_already_on);
+                       /* globally reverse other routes */
+                       
+                       for (RouteList::iterator r = rl2.begin(); r != rl2.end(); ++r) {
+                               if ((*r) != (*rt)) {
+                                       boost::shared_ptr<MidiTrack> mt = boost::dynamic_pointer_cast<MidiTrack> (*r);
+                                       if (mt) {
+                                               mt->set_input_active (!others_are_already_on);
+                                       }
+                               }
                        }
                }
        }
@@ -2696,7 +2799,7 @@ Session::set_exclusive_input_active (boost::shared_ptr<Route> rt, bool /*others_
 void
 Session::routes_using_input_from (const string& str, RouteList& rl)
 {
-       boost::shared_ptr<RouteList> r = routes.reader ();
+       boost::shared_ptr<RouteList> r = routes.reader();
 
        for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
                if ((*i)->input()->connected_to (str)) {
@@ -2854,7 +2957,7 @@ Session::find_whole_file_parent (boost::shared_ptr<Region const> child) const
        RegionFactory::RegionMap::const_iterator i;
        boost::shared_ptr<Region> region;
 
-       Glib::Mutex::Lock lm (region_lock);
+       Glib::Threads::Mutex::Lock lm (region_lock);
 
        for (i = regions.begin(); i != regions.end(); ++i) {
 
@@ -2900,7 +3003,7 @@ Session::destroy_sources (list<boost::shared_ptr<Source> > srcs)
        for (list<boost::shared_ptr<Source> >::iterator s = srcs.begin(); s != srcs.end(); ) {
 
                {
-                       Glib::Mutex::Lock ls (source_lock);
+                       Glib::Threads::Mutex::Lock ls (source_lock);
                        /* remove from the main source list */
                        sources.erase ((*s)->id());
                }
@@ -2953,7 +3056,7 @@ Session::add_source (boost::shared_ptr<Source> source)
        entry.second = source;
 
        {
-               Glib::Mutex::Lock lm (source_lock);
+               Glib::Threads::Mutex::Lock lm (source_lock);
                result = sources.insert (entry);
        }
 
@@ -2998,7 +3101,7 @@ Session::remove_source (boost::weak_ptr<Source> src)
        }
 
        {
-               Glib::Mutex::Lock lm (source_lock);
+               Glib::Threads::Mutex::Lock lm (source_lock);
 
                if ((i = sources.find (source->id())) != sources.end()) {
                        sources.erase (i);
@@ -3018,7 +3121,7 @@ Session::remove_source (boost::weak_ptr<Source> src)
 boost::shared_ptr<Source>
 Session::source_by_id (const PBD::ID& id)
 {
-       Glib::Mutex::Lock lm (source_lock);
+       Glib::Threads::Mutex::Lock lm (source_lock);
        SourceMap::iterator i;
        boost::shared_ptr<Source> source;
 
@@ -3032,7 +3135,7 @@ Session::source_by_id (const PBD::ID& id)
 boost::shared_ptr<Source>
 Session::source_by_path_and_channel (const string& path, uint16_t chn)
 {
-       Glib::Mutex::Lock lm (source_lock);
+       Glib::Threads::Mutex::Lock lm (source_lock);
 
        for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
                boost::shared_ptr<AudioFileSource> afs
@@ -3049,7 +3152,7 @@ uint32_t
 Session::count_sources_by_origin (const string& path)
 {
        uint32_t cnt = 0;
-       Glib::Mutex::Lock lm (source_lock);
+       Glib::Threads::Mutex::Lock lm (source_lock);
 
        for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
                boost::shared_ptr<FileSource> fs
@@ -3297,7 +3400,7 @@ Session::create_audio_source_for_session (size_t n_chans, string const & n, uint
        const string path    = new_source_path_from_name(DataType::AUDIO, name);
 
        return boost::dynamic_pointer_cast<AudioFileSource> (
-               SourceFactory::createWritable (DataType::AUDIO, *this, path, string(), destructive, frame_rate()));
+               SourceFactory::createWritable (DataType::AUDIO, *this, path, destructive, frame_rate()));
 }
 
 /** Return a unique name based on \a base for a new internal MIDI source */
@@ -3373,7 +3476,7 @@ Session::create_midi_source_for_session (Track* track, string const & n)
 
        return boost::dynamic_pointer_cast<SMFSource> (
                SourceFactory::createWritable (
-                       DataType::MIDI, *this, path, string(), false, frame_rate()));
+                       DataType::MIDI, *this, path, false, frame_rate()));
 }
 
 
@@ -3483,7 +3586,7 @@ Session::graph_reordered ()
           from a set_state() call or creating new tracks. Ditto for deletion.
        */
 
-       if (_state_of_the_state & (InitialConnecting|Deletion)) {
+       if ((_state_of_the_state & (InitialConnecting|Deletion)) || _adding_routes_in_progress) {
                return;
        }
 
@@ -3514,6 +3617,8 @@ Session::graph_reordered ()
 boost::optional<framecnt_t>
 Session::available_capture_duration ()
 {
+       Glib::Threads::Mutex::Lock lm (space_lock);
+
        if (_total_free_4k_blocks_uncertain) {
                return boost::optional<framecnt_t> ();
        }
@@ -3923,7 +4028,7 @@ Session::write_one_track (AudioTrack& track, framepos_t start, framepos_t end,
 
                try {
                        fsource = boost::dynamic_pointer_cast<AudioFileSource> (
-                               SourceFactory::createWritable (DataType::AUDIO, *this, buf, string(), false, frame_rate()));
+                               SourceFactory::createWritable (DataType::AUDIO, *this, buf, false, frame_rate()));
                }
 
                catch (failed_constructor& err) {
@@ -4116,7 +4221,7 @@ Session::add_automation_list(AutomationList *al)
 bool
 Session::have_rec_enabled_track () const
 {
-       return g_atomic_int_get (&_have_rec_enabled_track) == 1;
+       return g_atomic_int_get (const_cast<gint*>(&_have_rec_enabled_track)) == 1;
 }
 
 /** Update the state of our rec-enabled tracks flag */
@@ -4187,18 +4292,6 @@ Session::route_removed_from_route_group (RouteGroup* rg, boost::weak_ptr<Route>
        RouteRemovedFromRouteGroup (rg, r);
 }
 
-vector<SyncSource>
-Session::get_available_sync_options () const
-{
-       vector<SyncSource> ret;
-
-       ret.push_back (JACK);
-       ret.push_back (MTC);
-       ret.push_back (MIDIClock);
-
-       return ret;
-}
-
 boost::shared_ptr<RouteList>
 Session::get_routes_with_regions_at (framepos_t const p) const
 {
@@ -4335,7 +4428,7 @@ Session::source_search_path (DataType type) const
        if (session_dirs.size() == 1) {
                switch (type) {
                case DataType::AUDIO:
-                       s.push_back ( _session_dir->sound_path());
+                       s.push_back (_session_dir->sound_path());
                        break;
                case DataType::MIDI:
                        s.push_back (_session_dir->midi_path());
@@ -4355,6 +4448,15 @@ Session::source_search_path (DataType type) const
                }
        }
 
+       if (type == DataType::AUDIO) {
+               const string sound_path_2X = _session_dir->sound_path_2X();
+               if (Glib::file_test (sound_path_2X, Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_DIR)) {
+                       if (find (s.begin(), s.end(), sound_path_2X) == s.end()) {
+                               s.push_back (sound_path_2X);
+                       }
+               }
+       }
+
        /* now check the explicit (possibly user-specified) search path
         */
 
@@ -4370,16 +4472,7 @@ Session::source_search_path (DataType type) const
        }
 
        for (vector<string>::iterator i = dirs.begin(); i != dirs.end(); ++i) {
-
-               vector<string>::iterator si;
-
-               for (si = s.begin(); si != s.end(); ++si) {
-                       if ((*si) == *i) {
-                               break;
-                       }
-               }
-
-               if (si == s.end()) {
+               if (find (s.begin(), s.end(), *i) == s.end()) {
                        s.push_back (*i);
                }
        }
@@ -4473,7 +4566,7 @@ Session::update_latency (bool playback)
 {
        DEBUG_TRACE (DEBUG::Latency, string_compose ("JACK latency callback: %1\n", (playback ? "PLAYBACK" : "CAPTURE")));
 
-       if (_state_of_the_state & (InitialConnecting|Deletion)) {
+       if ((_state_of_the_state & (InitialConnecting|Deletion)) || _adding_routes_in_progress) {
                return;
        }
 
@@ -4529,7 +4622,7 @@ Session::post_playback_latency ()
        boost::shared_ptr<RouteList> r = routes.reader ();
 
        for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
-               if (!(*i)->is_hidden() && ((*i)->active())) {
+               if (!(*i)->is_auditioner() && ((*i)->active())) {
                        _worst_track_latency = max (_worst_track_latency, (*i)->update_signal_latency ());
                }
        }
@@ -4560,7 +4653,7 @@ void
 Session::initialize_latencies ()
 {
         {
-                Glib::Mutex::Lock lm (_engine.process_lock());
+                Glib::Threads::Mutex::Lock lm (_engine.process_lock());
                 update_latency (false);
                 update_latency (true);
         }
@@ -4635,7 +4728,7 @@ Session::update_latency_compensation (bool force_whole_graph)
        boost::shared_ptr<RouteList> r = routes.reader ();
 
        for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
-               if (!(*i)->is_hidden() && ((*i)->active())) {
+               if (!(*i)->is_auditioner() && ((*i)->active())) {
                        framecnt_t tl;
                        if ((*i)->signal_latency () != (tl = (*i)->update_signal_latency ())) {
                                some_track_latency_changed = true;
@@ -4695,7 +4788,7 @@ Session::next_control_id () const
 }
 
 void
-Session::sync_order_keys (RouteSortOrderKey sort_key_changed)
+Session::notify_remote_id_change ()
 {
        if (deletion_in_progress()) {
                return;
@@ -4709,14 +4802,26 @@ Session::sync_order_keys (RouteSortOrderKey sort_key_changed)
        default:
                break;
        }
+}
+
+void
+Session::sync_order_keys (RouteSortOrderKey sort_key_changed)
+{
+       if (deletion_in_progress()) {
+               return;
+       }
 
        /* tell everyone that something has happened to the sort keys
           and let them sync up with the change(s)
+          this will give objects that manage the sort order keys the
+          opportunity to keep them in sync if they wish to.
        */
 
        DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("Sync Order Keys, based on %1\n", enum_2_string (sort_key_changed)));
 
        Route::SyncOrderKeys (sort_key_changed); /* EMIT SIGNAL */
+
+       DEBUG_TRACE (DEBUG::OrderKeys, "\tsync done\n");
 }
 
 bool
@@ -4724,3 +4829,47 @@ Session::operation_in_progress (GQuark op) const
 {
        return (find (_current_trans_quarks.begin(), _current_trans_quarks.end(), op) != _current_trans_quarks.end());
 }
+
+boost::shared_ptr<Port>
+Session::ltc_input_port () const
+{
+       return _ltc_input->nth (0);
+}
+
+boost::shared_ptr<Port>
+Session::ltc_output_port () const
+{
+       return _ltc_output->nth (0);
+}
+
+void
+Session::reconnect_ltc_input ()
+{
+       if (_ltc_input) {
+
+               string src = Config->get_ltc_source_port();
+
+               _ltc_input->disconnect (this);
+
+               if (src != _("None") && !src.empty())  {
+                       _ltc_input->nth (0)->connect (src);
+               }
+       }
+}
+
+void
+Session::reconnect_ltc_output ()
+{
+       if (_ltc_output) {
+
+#if 0
+               string src = Config->get_ltc_sink_port();
+
+               _ltc_output->disconnect (this);
+
+               if (src != _("None") && !src.empty())  {
+                       _ltc_output->nth (0)->connect (src);
+               }
+#endif
+       }
+}