Post-export hook tweaks
[ardour.git] / libs / ardour / session.cc
index e2deb716397b53a2ab64725213b0f19a1946206f..fbde7edf607dbf71074ce09d750eaf132fe5ea3e 100644 (file)
@@ -44,8 +44,8 @@
 #include "pbd/stacktrace.h"
 #include "pbd/file_utils.h"
 #include "pbd/convert.h"
-#include "pbd/strsplit.h"
 #include "pbd/unwind.h"
+#include "pbd/search_path.h"
 
 #include "ardour/amp.h"
 #include "ardour/analyser.h"
@@ -68,6 +68,7 @@
 #include "ardour/filename_extensions.h"
 #include "ardour/graph.h"
 #include "ardour/midiport_manager.h"
+#include "ardour/scene_changer.h"
 #include "ardour/midi_track.h"
 #include "ardour/midi_ui.h"
 #include "ardour/operations.h"
@@ -88,6 +89,7 @@
 #include "ardour/smf_source.h"
 #include "ardour/source_factory.h"
 #include "ardour/speakers.h"
+#include "ardour/track.h"
 #include "ardour/utils.h"
 
 #include "midi++/port.h"
@@ -123,6 +125,7 @@ PBD::Signal0<void> Session::FeedbackDetected;
 PBD::Signal0<void> Session::SuccessfulGraphSort;
 PBD::Signal2<void,std::string,std::string> Session::VersionMismatch;
 
+const framecnt_t Session::bounce_chunk_size = 65536;
 static void clean_up_session_event (SessionEvent* ev) { delete ev; }
 const SessionEvent::RTeventCallback Session::rt_cleanup (clean_up_session_event);
 
@@ -135,6 +138,7 @@ Session::Session (AudioEngine &eng,
        : playlists (new SessionPlaylists)
        , _engine (eng)
        , process_function (&Session::process_with_events)
+       , _bounce_processing_active (false)
        , waiting_for_sync_offset (false)
        , _base_frame_rate (0)
        , _current_frame_rate (0)
@@ -257,7 +261,11 @@ Session::Session (AudioEngine &eng,
        , _step_editors (0)
        , _suspend_timecode_transmission (0)
        ,  _speakers (new Speakers)
+       , _order_hint (0)
        , ignore_route_processor_changes (false)
+       , _scene_changer (0)
+       , _midi_ports (0)
+       , _mmc (0)
 {
        uint32_t sr = 0;
 
@@ -274,6 +282,21 @@ Session::Session (AudioEngine &eng,
                        throw failed_constructor ();
                }
 
+               /* if a mix template was provided, then ::create() will
+                * have copied it into the session and we need to load it
+                * so that we have the state ready for ::set_state()
+                * after the engine is started.
+                *
+                * Note that we do NOT try to get the sample rate from
+                * the template at this time, though doing so would
+                * be easy if we decided this was an appropriate part
+                * of a template.
+                */
+
+               if (!mix_template.empty() && load_state (_current_snapshot_name)) {
+                       throw failed_constructor ();
+               }
+
        } else {
 
                if (load_state (_current_snapshot_name)) {
@@ -368,14 +391,18 @@ Session::ensure_engine (uint32_t desired_sample_rate)
                return -1;
        }
 
-       /* the graph is just about as basic to everything else as the engine
-          so we create it here. this results in it coming into being at just
-          the right time for both new and existing sessions.
+       return immediately_post_engine ();
 
-          XXX some cleanup in the new/existing path is still waiting to be
-          done
-       */
+}
 
+int
+Session::immediately_post_engine ()
+{
+       /* Do various initializations that should take place directly after we
+        * know that the engine is running, but before we either create a
+        * session or set state for an existing one.
+        */
+        
        if (how_many_dsp_threads () > 1) {
                /* For now, only create the graph if we are using >1 DSP threads, as
                   it is a bit slower than the old code with 1 thread.
@@ -383,6 +410,31 @@ Session::ensure_engine (uint32_t desired_sample_rate)
                _process_graph.reset (new Graph (*this));
        }
 
+       /* every time we reconnect, recompute worst case output latencies */
+
+       _engine.Running.connect_same_thread (*this, boost::bind (&Session::initialize_latencies, this));
+
+       if (synced_to_engine()) {
+               _engine.transport_stop ();
+       }
+
+       if (config.get_jack_time_master()) {
+               _engine.transport_locate (_transport_frame);
+       }
+
+       try {
+               BootMessage (_("Set up LTC"));
+               setup_ltc ();
+               BootMessage (_("Set up Click"));
+               setup_click ();
+               BootMessage (_("Set up standard connections"));
+               setup_bundles ();
+       }
+
+       catch (failed_constructor& err) {
+               return -1;
+       }
+
        return 0;
 }
 
@@ -479,13 +531,16 @@ Session::destroy ()
        }
        routes.flush ();
 
-       DEBUG_TRACE (DEBUG::Destruction, "delete sources\n");
-       for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
-               DEBUG_TRACE(DEBUG::Destruction, string_compose ("Dropping for source %1 ; pre-ref = %2\n", i->second->name(), i->second.use_count()));
-               i->second->drop_references ();
-       }
+       {
+               DEBUG_TRACE (DEBUG::Destruction, "delete sources\n");
+               Glib::Threads::Mutex::Lock lm (source_lock);
+               for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
+                       DEBUG_TRACE(DEBUG::Destruction, string_compose ("Dropping for source %1 ; pre-ref = %2\n", i->second->name(), i->second.use_count()));
+                       i->second->drop_references ();
+               }
 
-       sources.clear ();
+               sources.clear ();
+       }
 
        DEBUG_TRACE (DEBUG::Destruction, "delete route groups\n");
        for (list<RouteGroup *>::iterator i = _route_groups.begin(); i != _route_groups.end(); ++i) {
@@ -496,9 +551,11 @@ Session::destroy ()
        /* not strictly necessary, but doing it here allows the shared_ptr debugging to work */
        playlists.reset ();
 
-       delete _mmc;
-       delete _midi_ports;
-       delete _locations;
+       delete _scene_changer; _scene_changer = 0;
+
+       delete _mmc; _mmc = 0;
+       delete _midi_ports; _midi_ports = 0;
+       delete _locations; _locations = 0;
 
        DEBUG_TRACE (DEBUG::Destruction, "Session::destroy() done\n");
 
@@ -512,10 +569,10 @@ Session::setup_ltc ()
 {
        XMLNode* child = 0;
        
-       _ltc_input.reset (new IO (*this, _("LTC In"), IO::Input));
-       _ltc_output.reset (new IO (*this, _("LTC Out"), IO::Output));
+       _ltc_input.reset (new IO (*this, X_("LTC In"), IO::Input));
+       _ltc_output.reset (new IO (*this, X_("LTC Out"), IO::Output));
        
-       if (state_tree && (child = find_named_node (*state_tree->root(), "LTC-In")) != 0) {
+       if (state_tree && (child = find_named_node (*state_tree->root(), X_("LTC In"))) != 0) {
                _ltc_input->set_state (*(child->children().front()), Stateful::loading_state_version);
        } else {
                {
@@ -525,7 +582,7 @@ Session::setup_ltc ()
                reconnect_ltc_input ();
        }
        
-       if (state_tree && (child = find_named_node (*state_tree->root(), "LTC-Out")) != 0) {
+       if (state_tree && (child = find_named_node (*state_tree->root(), X_("LTC Out"))) != 0) {
                _ltc_output->set_state (*(child->children().front()), Stateful::loading_state_version);
        } else {
                {
@@ -539,21 +596,30 @@ Session::setup_ltc ()
         * IO style of NAME/TYPE-{in,out}N
         */
        
-       _ltc_input->nth (0)->set_name (_("LTC-in"));
-       _ltc_output->nth (0)->set_name (_("LTC-out"));
+       _ltc_input->nth (0)->set_name (X_("LTC-in"));
+       _ltc_output->nth (0)->set_name (X_("LTC-out"));
 }
 
 void
 Session::setup_click ()
 {
-       XMLNode* child = 0;
-
        _clicking = false;
-       _click_io.reset (new ClickIO (*this, "click"));
+       _click_io.reset (new ClickIO (*this, X_("Click")));
        _click_gain.reset (new Amp (*this));
        _click_gain->activate ();
+       if (state_tree) {
+               setup_click_state (state_tree->root());
+       } else {
+               setup_click_state (0);
+       }
+}
+
+void
+Session::setup_click_state (const XMLNode* node)
+{      
+       const XMLNode* child = 0;
        
-       if (state_tree && (child = find_named_node (*state_tree->root(), "Click")) != 0) {
+       if (node && (child = find_named_node (*node, "Click")) != 0) {
                
                /* existing state for Click */
                int c = 0;
@@ -705,81 +771,6 @@ Session::setup_bundles ()
 
 }
 
-int
-Session::when_engine_running ()
-{
-       /* every time we reconnect, recompute worst case output latencies */
-
-       _engine.Running.connect_same_thread (*this, boost::bind (&Session::initialize_latencies, this));
-
-       if (synced_to_jack()) {
-               _engine.transport_stop ();
-       }
-
-       if (config.get_jack_time_master()) {
-               _engine.transport_locate (_transport_frame);
-       }
-
-
-       try {
-               BootMessage (_("Set up LTC"));
-               setup_ltc ();
-               BootMessage (_("Set up Click"));
-               setup_click ();
-               BootMessage (_("Set up standard connections"));
-               setup_bundles ();
-       }
-
-       catch (failed_constructor& err) {
-               return -1;
-       }
-
-       BootMessage (_("Setup signal flow and plugins"));
-
-       /* Reset all panners */
-
-       Delivery::reset_panners ();
-
-       /* this will cause the CPM to instantiate any protocols that are in use
-        * (or mandatory), which will pass it this Session, and then call
-        * set_state() on each instantiated protocol to match stored state.
-        */
-
-       ControlProtocolManager::instance().set_session (this);
-
-       /* This must be done after the ControlProtocolManager set_session above,
-          as it will set states for ports which the ControlProtocolManager creates.
-       */
-
-       // XXX set state of MIDI::Port's
-       // MidiPortManager::instance()->set_port_states (Config->midi_port_states ());
-
-       /* And this must be done after the MIDI::Manager::set_port_states as
-        * it will try to make connections whose details are loaded by set_port_states.
-        */
-
-       hookup_io ();
-
-       /* Let control protocols know that we are now all connected, so they
-        * could start talking to surfaces if they want to.
-        */
-
-       ControlProtocolManager::instance().midi_connectivity_established ();
-
-       if (_is_new && !no_auto_connect()) {
-               Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock());
-               auto_connect_master_bus ();
-       }
-
-       _state_of_the_state = StateOfTheState (_state_of_the_state & ~(CannotSave|Dirty));
-
-        /* update latencies */
-
-        initialize_latencies ();
-
-       return 0;
-}
-
 void
 Session::auto_connect_master_bus ()
 {
@@ -824,6 +815,12 @@ Session::remove_monitor_section ()
        /* force reversion to Solo-In-Place */
        Config->set_solo_control_is_listen_control (false);
 
+       /* if we are auditioning, cancel it ... this is a workaround
+          to a problem (auditioning does not execute the process graph,
+          which is needed to remove routes when using >1 core for processing)
+       */
+       cancel_audition ();
+
        {
                /* Hold process lock while doing this so that we don't hear bits and
                 * pieces of audio as we work on each route.
@@ -854,6 +851,10 @@ Session::remove_monitor_section ()
 
        remove_route (_monitor_out);
        auto_connect_master_bus ();
+
+       if (auditioner) {
+               auditioner->connect ();
+       }
 }
 
 void
@@ -939,14 +940,14 @@ Session::add_monitor_section ()
                        
                        /* Monitor bus is audio only */
 
-                       uint32_t mod = n_physical_outputs.get (DataType::AUDIO);
-                       uint32_t limit = _monitor_out->n_outputs().get (DataType::AUDIO);
                        vector<string> outputs[DataType::num_types];
 
                        for (uint32_t i = 0; i < DataType::num_types; ++i) {
                                _engine.get_physical_outputs (DataType (DataType::Symbol (i)), outputs[i]);
                        }
-                       
+
+                       uint32_t mod = outputs[DataType::AUDIO].size();
+                       uint32_t limit = _monitor_out->n_outputs().get (DataType::AUDIO);
                        
                        if (mod != 0) {
                                
@@ -998,6 +999,10 @@ Session::add_monitor_section ()
                        (*x)->enable_monitor_send ();
                }
        }
+
+       if (auditioner) {
+               auditioner->connect ();
+       }
 }
 
 void
@@ -1450,7 +1455,7 @@ Session::audible_frame () const
                offset = current_block_size;
        }
 
-       if (synced_to_jack()) {
+       if (synced_to_engine()) {
                tf = _engine.transport_frame();
        } else {
                tf = _transport_frame;
@@ -1719,7 +1724,7 @@ Session::resort_routes_using (boost::shared_ptr<RouteList> r)
                DEBUG_TRACE (DEBUG::Graph, "Routes resorted, order follows:\n");
                for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
                        DEBUG_TRACE (DEBUG::Graph, string_compose ("\t%1 signal order %2\n",
-                                                                  (*i)->name(), (*i)->order_key (MixerSort)));
+                                                                  (*i)->name(), (*i)->order_key ()));
                }
 #endif
 
@@ -2004,9 +2009,9 @@ Session::auto_connect_route (boost::shared_ptr<Route> route, ChanCount& existing
                        for (uint32_t i = output_start.get(*t); i < route->n_outputs().get(*t); ++i) {
                                string port;
 
-                               if ((*t) == DataType::MIDI || Config->get_output_auto_connect() & AutoConnectPhysical) {
+                               if ((*t) == DataType::MIDI && (Config->get_output_auto_connect() & AutoConnectPhysical)) {
                                        port = physoutputs[(out_offset.get(*t) + i) % nphysical_out];
-                               } else if ((*t) == DataType::AUDIO && Config->get_output_auto_connect() & AutoConnectMaster) {
+                               } else if ((*t) == DataType::AUDIO && (Config->get_output_auto_connect() & AutoConnectMaster)) {
                                         /* master bus is audio only */
                                        if (_master_out && _master_out->n_inputs().get(*t) > 0) {
                                                port = _master_out->input()->ports().port(*t,
@@ -2355,6 +2360,11 @@ Session::add_routes_inner (RouteList& new_routes, bool input_auto_connect, bool
         ChanCount existing_outputs;
        uint32_t order = next_control_id();
 
+       if (_order_hint != 0) {
+               order = _order_hint;
+               _order_hint = 0;
+       }
+
         count_existing_track_channels (existing_inputs, existing_outputs);
 
        {
@@ -2416,15 +2426,13 @@ Session::add_routes_inner (RouteList& new_routes, bool input_auto_connect, bool
                   ID in most situations.
                */
 
-               if (!r->has_order_key (EditorSort)) {
+               if (!r->has_order_key ()) {
                        if (r->is_auditioner()) {
                                /* use an arbitrarily high value */
-                               r->set_order_key (EditorSort, UINT_MAX);
-                               r->set_order_key (MixerSort, UINT_MAX);
+                               r->set_order_key (UINT_MAX);
                        } else {
                                DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("while adding, set %1 to order key %2\n", r->name(), order));
-                               r->set_order_key (EditorSort, order);
-                               r->set_order_key (MixerSort, order);
+                               r->set_order_key (order);
                                order++;
                        }
                }
@@ -3302,12 +3310,16 @@ Session::source_by_id (const PBD::ID& id)
        return source;
 }
 
-boost::shared_ptr<Source>
-Session::source_by_path_and_channel (const string& path, uint16_t chn)
+boost::shared_ptr<AudioFileSource>
+Session::audio_source_by_path_and_channel (const string& path, uint16_t chn) const
 {
+       /* Restricted to audio files because only audio sources have channel
+          as a property.
+       */
+
        Glib::Threads::Mutex::Lock lm (source_lock);
 
-       for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
+       for (SourceMap::const_iterator i = sources.begin(); i != sources.end(); ++i) {
                boost::shared_ptr<AudioFileSource> afs
                        = boost::dynamic_pointer_cast<AudioFileSource>(i->second);
 
@@ -3315,7 +3327,31 @@ Session::source_by_path_and_channel (const string& path, uint16_t chn)
                        return afs;
                }
        }
-       return boost::shared_ptr<Source>();
+
+       return boost::shared_ptr<AudioFileSource>();
+}
+
+boost::shared_ptr<MidiSource>
+Session::midi_source_by_path (const std::string& path) const
+{
+       /* Restricted to MIDI files because audio sources require a channel
+          for unique identification, in addition to a path.
+       */
+
+       Glib::Threads::Mutex::Lock lm (source_lock);
+
+       for (SourceMap::const_iterator s = sources.begin(); s != sources.end(); ++s) {
+               boost::shared_ptr<MidiSource> ms
+                       = boost::dynamic_pointer_cast<MidiSource>(s->second);
+               boost::shared_ptr<FileSource> fs
+                       = boost::dynamic_pointer_cast<FileSource>(s->second);
+               
+               if (ms && fs && fs->path() == path) {
+                       return ms;
+               }
+       }
+
+       return boost::shared_ptr<MidiSource>();
 }
 
 uint32_t
@@ -3336,111 +3372,6 @@ Session::count_sources_by_origin (const string& path)
        return cnt;
 }
 
-
-string
-Session::change_source_path_by_name (string path, string oldname, string newname, bool destructive)
-{
-       string look_for;
-       string old_basename = PBD::basename_nosuffix (oldname);
-       string new_legalized = legalize_for_path (newname);
-
-       /* note: we know (or assume) the old path is already valid */
-
-       if (destructive) {
-
-               /* destructive file sources have a name of the form:
-
-                   /path/to/Tnnnn-NAME(%[LR])?.wav
-
-                   the task here is to replace NAME with the new name.
-               */
-
-               string dir;
-               string prefix;
-               string::size_type dash;
-
-               dir = Glib::path_get_dirname (path);
-               path = Glib::path_get_basename (path);
-
-               /* '-' is not a legal character for the NAME part of the path */
-
-               if ((dash = path.find_last_of ('-')) == string::npos) {
-                       return "";
-               }
-
-               prefix = path.substr (0, dash);
-
-               path += prefix;
-               path += '-';
-               path += new_legalized;
-               path += native_header_format_extension (config.get_native_file_header_format(), DataType::AUDIO);
-               path = Glib::build_filename (dir, path);
-
-       } else {
-
-               /* non-destructive file sources have a name of the form:
-
-                   /path/to/NAME-nnnnn(%[LR])?.ext
-
-                   the task here is to replace NAME with the new name.
-               */
-
-               string dir;
-               string suffix;
-               string::size_type dash;
-               string::size_type postfix;
-
-               dir = Glib::path_get_dirname (path);
-               path = Glib::path_get_basename (path);
-
-               /* '-' is not a legal character for the NAME part of the path */
-
-               if ((dash = path.find_last_of ('-')) == string::npos) {
-                       return "";
-               }
-
-               suffix = path.substr (dash+1);
-
-               // Suffix is now everything after the dash. Now we need to eliminate
-               // the nnnnn part, which is done by either finding a '%' or a '.'
-
-               postfix = suffix.find_last_of ("%");
-               if (postfix == string::npos) {
-                       postfix = suffix.find_last_of ('.');
-               }
-
-               if (postfix != string::npos) {
-                       suffix = suffix.substr (postfix);
-               } else {
-                       error << "Logic error in Session::change_source_path_by_name(), please report" << endl;
-                       return "";
-               }
-
-               const uint32_t limit = 10000;
-               char buf[PATH_MAX+1];
-
-               for (uint32_t cnt = 1; cnt <= limit; ++cnt) {
-
-                       snprintf (buf, sizeof(buf), "%s-%u%s", newname.c_str(), cnt, suffix.c_str());
-
-                       if (!matching_unsuffixed_filename_exists_in (dir, buf)) {
-                               path = Glib::build_filename (dir, buf);
-                               break;
-                       }
-
-                       path = "";
-               }
-
-               if (path.empty()) {
-                       fatal << string_compose (_("FATAL ERROR! Could not find a suitable version of %1 for a rename"),
-                                                newname) << endl;
-                       /*NOTREACHED*/
-               }
-       }
-
-       return path;
-}
-
 /** Return the full path (in some session directory) for a new within-session source.
  * \a name must be a session-unique name that does not contain slashes
  *         (e.g. as returned by new_*_source_name)
@@ -3544,6 +3475,22 @@ Session::new_audio_source_name (const string& base, uint32_t nchan, uint32_t cha
                                existing++;
                                break;
                        }
+
+                       /* it is possible that we have the path already
+                        * assigned to a source that has not yet been written
+                        * (ie. the write source for a diskstream). we have to
+                        * check this in order to make sure that our candidate
+                        * path isn't used again, because that can lead to
+                        * two Sources point to the same file with different
+                        * notions of their removability.
+                        */
+
+                       string possible_path = Glib::build_filename (spath, buf);
+
+                       if (audio_source_by_path_and_channel (possible_path, chan)) {
+                               existing++;
+                               break;
+                       }
                }
 
                if (existing == 0) {
@@ -3573,19 +3520,21 @@ Session::create_audio_source_for_session (size_t n_chans, string const & n, uint
                SourceFactory::createWritable (DataType::AUDIO, *this, path, destructive, frame_rate()));
 }
 
-/** Return a unique name based on \a base for a new internal MIDI source */
+/** Return a unique name based on \a owner_name for a new internal MIDI source */
 string
-Session::new_midi_source_name (const string& base)
+Session::new_midi_source_name (const string& owner_name)
 {
        uint32_t cnt;
        char buf[PATH_MAX+1];
        const uint32_t limit = 10000;
        string legalized;
+       string possible_name;
 
        buf[0] = '\0';
-       legalized = legalize_for_path (base);
+       legalized = legalize_for_path (owner_name);
 
        // Find a "version" of the file name that doesn't exist in any of the possible directories.
+
        for (cnt = 1; cnt <= limit; ++cnt) {
 
                vector<space_and_path>::iterator i;
@@ -3594,12 +3543,17 @@ Session::new_midi_source_name (const string& base)
                for (i = session_dirs.begin(); i != session_dirs.end(); ++i) {
 
                        SessionDirectory sdir((*i).path);
+                       
+                       snprintf (buf, sizeof(buf), "%s-%u.mid", legalized.c_str(), cnt);
+                       possible_name = buf;
 
-                       std::string p = Glib::build_filename (sdir.midi_path(), legalized);
-
-                       snprintf (buf, sizeof(buf), "%s-%u.mid", p.c_str(), cnt);
+                       std::string possible_path = Glib::build_filename (sdir.midi_path(), possible_name);
+                       
+                       if (Glib::file_test (possible_path, Glib::FILE_TEST_EXISTS)) {
+                               existing++;
+                       }
 
-                       if (Glib::file_test (buf, Glib::FILE_TEST_EXISTS)) {
+                       if (midi_source_by_path (possible_path)) {
                                existing++;
                        }
                }
@@ -3611,37 +3565,64 @@ Session::new_midi_source_name (const string& base)
                if (cnt > limit) {
                        error << string_compose(
                                        _("There are already %1 recordings for %2, which I consider too many."),
-                                       limit, base) << endmsg;
+                                       limit, owner_name) << endmsg;
                        destroy ();
                        throw failed_constructor();
                }
        }
 
-       return Glib::path_get_basename(buf);
+       return possible_name;
 }
 
 
 /** Create a new within-session MIDI source */
 boost::shared_ptr<MidiSource>
-Session::create_midi_source_for_session (Track* track, string const & n)
+Session::create_midi_source_for_session (string const & basic_name)
 {
-       /* try to use the existing write source for the track, to keep numbering sane
-        */
+       std::string name;
 
-       if (track) {
-               /*MidiTrack* mt = dynamic_cast<Track*> (track);
-                 assert (mt);
-               */
+       if (name.empty()) {
+               name = new_midi_source_name (basic_name);
+       }
 
-               list<boost::shared_ptr<Source> > l = track->steal_write_sources ();
+       const string path = new_source_path_from_name (DataType::MIDI, name);
 
-               if (!l.empty()) {
-                       assert (boost::dynamic_pointer_cast<MidiSource> (l.front()));
-                       return boost::dynamic_pointer_cast<MidiSource> (l.front());
-               }
+       return boost::dynamic_pointer_cast<SMFSource> (
+               SourceFactory::createWritable (
+                       DataType::MIDI, *this, path, false, frame_rate()));
+}
+
+/** Create a new within-session MIDI source */
+boost::shared_ptr<MidiSource>
+Session::create_midi_source_by_stealing_name (boost::shared_ptr<Track> track)
+{
+       /* the caller passes in the track the source will be used in,
+          so that we can keep the numbering sane. 
+          
+          Rationale: a track with the name "Foo" that has had N
+          captures carried out so far will ALREADY have a write source
+          named "Foo-N+1.mid" waiting to be used for the next capture.
+          
+          If we call new_midi_source_name() we will get "Foo-N+2". But
+          there is no region corresponding to "Foo-N+1", so when
+          "Foo-N+2" appears in the track, the gap presents the user
+          with odd behaviour - why did it skip past Foo-N+1?
+          
+          We could explain this to the user in some odd way, but
+          instead we rename "Foo-N+1.mid" as "Foo-N+2.mid", and then
+          use "Foo-N+1" here.
+          
+          If that attempted rename fails, we get "Foo-N+2.mid" anyway.
+       */
+       
+       boost::shared_ptr<MidiTrack> mt = boost::dynamic_pointer_cast<MidiTrack> (track);
+       assert (mt);
+       std::string name = track->steal_write_source_name ();
+
+       if (name.empty()) {
+               return boost::shared_ptr<MidiSource>();
        }
 
-       const string name = new_midi_source_name (n);
        const string path = new_source_path_from_name (DataType::MIDI, name);
 
        return boost::dynamic_pointer_cast<SMFSource> (
@@ -3735,7 +3716,7 @@ Session::RoutePublicOrderSorter::operator() (boost::shared_ptr<Route> a, boost::
        if (b->is_monitor()) {
                return false;
        }
-       return a->order_key (MixerSort) < b->order_key (MixerSort);
+       return a->order_key () < b->order_key ();
 }
 
 bool
@@ -3902,7 +3883,7 @@ Session::update_locations_after_tempo_map_change (Locations::LocationList& loc)
 void
 Session::ensure_buffers (ChanCount howmany)
 {
-       BufferManager::ensure_buffers (howmany);
+       BufferManager::ensure_buffers (howmany, bounce_processing() ? bounce_chunk_size : 0);
 }
 
 void
@@ -4143,7 +4124,7 @@ Session::write_one_track (AudioTrack& track, framepos_t start, framepos_t end,
                          bool /*overwrite*/, vector<boost::shared_ptr<Source> >& srcs,
                          InterThreadInfo& itt, 
                          boost::shared_ptr<Processor> endpoint, bool include_endpoint,
-                         bool for_export)
+                         bool for_export, bool for_freeze)
 {
        boost::shared_ptr<Region> result;
        boost::shared_ptr<Playlist> playlist;
@@ -4154,6 +4135,7 @@ Session::write_one_track (AudioTrack& track, framepos_t start, framepos_t end,
        framepos_t position;
        framecnt_t this_chunk;
        framepos_t to_do;
+       framepos_t latency_skip;
        BufferSet buffers;
        SessionDirectory sdir(get_best_session_directory_for_new_source ());
        const string sound_dir = sdir.sound_path();
@@ -4168,12 +4150,28 @@ Session::write_one_track (AudioTrack& track, framepos_t start, framepos_t end,
                return result;
        }
 
-       const framecnt_t chunk_size = (256 * 1024)/4;
+       diskstream_channels = track.bounce_get_output_streams (diskstream_channels, endpoint,
+                       include_endpoint, for_export, for_freeze);
+
+       if (diskstream_channels.n_audio() < 1) {
+               error << _("Cannot write a range with no audio.") << endmsg;
+               return result;
+       }
 
        // block all process callback handling
 
        block_processing ();
 
+       {
+               // synchronize with AudioEngine::process_callback()
+               // make sure processing is not currently running
+               // and processing_blocked() is honored before
+               // acquiring thread buffers
+               Glib::Threads::Mutex::Lock lm (_engine.process_lock());
+       }
+
+       _bounce_processing_active = true;
+
        /* call tree *MUST* hold route_lock */
 
        if ((playlist = track.playlist()) == 0) {
@@ -4215,13 +4213,17 @@ Session::write_one_track (AudioTrack& track, framepos_t start, framepos_t end,
         */
 
        need_block_size_reset = true;
-       track.set_block_size (chunk_size);
+       track.set_block_size (bounce_chunk_size);
+       _engine.main_thread()->get_buffers ();
 
        position = start;
        to_do = len;
+       latency_skip = track.bounce_get_latency (endpoint, include_endpoint, for_export, for_freeze);
 
        /* create a set of reasonably-sized buffers */
-       buffers.ensure_buffers (DataType::AUDIO, max_proc.n_audio(), chunk_size);
+       for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+               buffers.ensure_buffers(*t, max_proc.get(*t), bounce_chunk_size);
+       }
        buffers.set_count (max_proc);
 
        for (vector<boost::shared_ptr<Source> >::iterator src = srcs.begin(); src != srcs.end(); ++src) {
@@ -4232,28 +4234,56 @@ Session::write_one_track (AudioTrack& track, framepos_t start, framepos_t end,
 
        while (to_do && !itt.cancel) {
 
-               this_chunk = min (to_do, chunk_size);
+               this_chunk = min (to_do, bounce_chunk_size);
 
-               if (track.export_stuff (buffers, start, this_chunk, endpoint, include_endpoint, for_export)) {
+               if (track.export_stuff (buffers, start, this_chunk, endpoint, include_endpoint, for_export, for_freeze)) {
                        goto out;
                }
 
+               start += this_chunk;
+               to_do -= this_chunk;
+               itt.progress = (float) (1.0 - ((double) to_do / len));
+
+               if (latency_skip >= bounce_chunk_size) {
+                       latency_skip -= bounce_chunk_size;
+                       continue;
+               }
+
+               const framecnt_t current_chunk = this_chunk - latency_skip;
+
                uint32_t n = 0;
                for (vector<boost::shared_ptr<Source> >::iterator src=srcs.begin(); src != srcs.end(); ++src, ++n) {
                        boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*src);
 
                        if (afs) {
-                               if (afs->write (buffers.get_audio(n).data(), this_chunk) != this_chunk) {
+                               if (afs->write (buffers.get_audio(n).data(latency_skip), current_chunk) != current_chunk) {
                                        goto out;
                                }
                        }
                }
+               latency_skip = 0;
+       }
 
-               start += this_chunk;
-               to_do -= this_chunk;
+       /* post-roll, pick up delayed processor output */
+       latency_skip = track.bounce_get_latency (endpoint, include_endpoint, for_export, for_freeze);
 
-               itt.progress = (float) (1.0 - ((double) to_do / len));
+       while (latency_skip && !itt.cancel) {
+               this_chunk = min (latency_skip, bounce_chunk_size);
+               latency_skip -= this_chunk;
 
+               buffers.silence (this_chunk, 0);
+               track.bounce_process (buffers, start, this_chunk, endpoint, include_endpoint, for_export, for_freeze);
+
+               uint32_t n = 0;
+               for (vector<boost::shared_ptr<Source> >::iterator src=srcs.begin(); src != srcs.end(); ++src, ++n) {
+                       boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*src);
+
+                       if (afs) {
+                               if (afs->write (buffers.get_audio(n).data(), this_chunk) != this_chunk) {
+                                       goto out;
+                               }
+                       }
+               }
        }
 
        if (!itt.cancel) {
@@ -4305,8 +4335,10 @@ Session::write_one_track (AudioTrack& track, framepos_t start, framepos_t end,
                }
        }
 
+       _bounce_processing_active = false;
 
        if (need_block_size_reset) {
+               _engine.main_thread()->drop_buffers ();
                track.set_block_size (get_block_size());
        }
 
@@ -4597,18 +4629,18 @@ Session::end_time_changed (framepos_t old)
        }
 }
 
-string
+std::vector<std::string>
 Session::source_search_path (DataType type) const
 {
-       vector<string> s;
+       Searchpath sp;
 
        if (session_dirs.size() == 1) {
                switch (type) {
                case DataType::AUDIO:
-                       s.push_back (_session_dir->sound_path());
+                       sp.push_back (_session_dir->sound_path());
                        break;
                case DataType::MIDI:
-                       s.push_back (_session_dir->midi_path());
+                       sp.push_back (_session_dir->midi_path());
                        break;
                }
        } else {
@@ -4616,10 +4648,10 @@ Session::source_search_path (DataType type) const
                        SessionDirectory sdir (i->path);
                        switch (type) {
                        case DataType::AUDIO:
-                               s.push_back (sdir.sound_path());
+                               sp.push_back (sdir.sound_path());
                                break;
                        case DataType::MIDI:
-                               s.push_back (sdir.midi_path());
+                               sp.push_back (sdir.midi_path());
                                break;
                        }
                }
@@ -4628,49 +4660,30 @@ 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);
+                       if (find (sp.begin(), sp.end(), sound_path_2X) == sp.end()) {
+                               sp.push_back (sound_path_2X);
                        }
                }
        }
 
-       /* now check the explicit (possibly user-specified) search path
-        */
-
-       vector<string> dirs;
+       // now check the explicit (possibly user-specified) search path
 
        switch (type) {
        case DataType::AUDIO:
-               split (config.get_audio_search_path (), dirs, ':');
+               sp += Searchpath(config.get_audio_search_path ());
                break;
        case DataType::MIDI:
-               split (config.get_midi_search_path (), dirs, ':');
+               sp += Searchpath(config.get_midi_search_path ());
                break;
        }
 
-       for (vector<string>::iterator i = dirs.begin(); i != dirs.end(); ++i) {
-               if (find (s.begin(), s.end(), *i) == s.end()) {
-                       s.push_back (*i);
-               }
-       }
-       
-       string search_path;
-
-       for (vector<string>::iterator si = s.begin(); si != s.end(); ++si) {
-               if (!search_path.empty()) {
-                       search_path += ':';
-               }
-               search_path += *si;
-       }
-
-       return search_path;
+       return sp;
 }
 
 void
 Session::ensure_search_path_includes (const string& path, DataType type)
 {
-       string search_path;
-       vector<string> dirs;
+       Searchpath sp;
 
        if (path == ".") {
                return;
@@ -4678,16 +4691,14 @@ Session::ensure_search_path_includes (const string& path, DataType type)
 
        switch (type) {
        case DataType::AUDIO:
-               search_path = config.get_audio_search_path ();
+               sp += Searchpath(config.get_audio_search_path ());
                break;
        case DataType::MIDI:
-               search_path = config.get_midi_search_path ();
+               sp += Searchpath (config.get_midi_search_path ());
                break;
        }
 
-       split (search_path, dirs, ':');
-
-       for (vector<string>::iterator i = dirs.begin(); i != dirs.end(); ++i) {
+       for (vector<std::string>::iterator i = sp.begin(); i != sp.end(); ++i) {
                /* No need to add this new directory if it has the same inode as
                   an existing one; checking inode rather than name prevents duplicated
                   directories when we are using symlinks.
@@ -4699,18 +4710,14 @@ Session::ensure_search_path_includes (const string& path, DataType type)
                }
        }
 
-       if (!search_path.empty()) {
-               search_path += ':';
-       }
-
-       search_path += path;
+       sp += path;
 
        switch (type) {
        case DataType::AUDIO:
-               config.set_audio_search_path (search_path);
+               config.set_audio_search_path (sp.to_string());
                break;
        case DataType::MIDI:
-               config.set_midi_search_path (search_path);
+               config.set_midi_search_path (sp.to_string());
                break;
        }
 }
@@ -4972,8 +4979,7 @@ Session::notify_remote_id_change ()
        }
 
        switch (Config->get_remote_model()) {
-       case MixerSort:
-       case EditorSort:
+       case MixerOrdered:
                Route::RemoteControlIDChange (); /* EMIT SIGNAL */
                break;
        default:
@@ -4982,7 +4988,7 @@ Session::notify_remote_id_change ()
 }
 
 void
-Session::sync_order_keys (RouteSortOrderKey sort_key_changed)
+Session::sync_order_keys ()
 {
        if (deletion_in_progress()) {
                return;
@@ -4994,9 +5000,9 @@ Session::sync_order_keys (RouteSortOrderKey sort_key_changed)
           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)));
+       DEBUG_TRACE (DEBUG::OrderKeys, "Sync Order Keys.\n");
 
-       Route::SyncOrderKeys (sort_key_changed); /* EMIT SIGNAL */
+       Route::SyncOrderKeys (); /* EMIT SIGNAL */
 
        DEBUG_TRACE (DEBUG::OrderKeys, "\tsync done\n");
 }