allow to load/save default session-properties
[ardour.git] / libs / ardour / session.cc
index af52163ae9684bd9cf86afc3d595a09d7ce3fca7..121df3130cb60f2cf08755d6318ad28e9013b61e 100644 (file)
 
 #include "pbd/error.h"
 #include "pbd/boost_debug.h"
-#include "pbd/pathscanner.h"
 #include "pbd/stl_delete.h"
 #include "pbd/basename.h"
 #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 +67,7 @@
 #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"
@@ -81,6 +81,7 @@
 #include "ardour/region_factory.h"
 #include "ardour/route_graph.h"
 #include "ardour/route_group.h"
+#include "ardour/route_sorters.h"
 #include "ardour/send.h"
 #include "ardour/session.h"
 #include "ardour/session_directory.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)
@@ -190,6 +194,8 @@ Session::Session (AudioEngine &eng,
        , state_tree (0)
        , state_was_pending (false)
        , _state_of_the_state (StateOfTheState(CannotSave|InitialConnecting|Loading))
+       , _suspend_save (0)
+       , _save_queued (false)
        , _last_roll_location (0)
        , _last_roll_or_reversal_location (0)
        , _last_record_location (0)
@@ -231,6 +237,7 @@ Session::Session (AudioEngine &eng,
        , routes (new RouteList)
        , _adding_routes_in_progress (false)
        , destructive_index (0)
+       , _track_number_decimals(1)
        , solo_update_disabled (false)
        , default_fade_steepness (0)
        , default_fade_msecs (0)
@@ -259,6 +266,7 @@ Session::Session (AudioEngine &eng,
        ,  _speakers (new Speakers)
        , _order_hint (0)
        , ignore_route_processor_changes (false)
+       , _scene_changer (0)
        , _midi_ports (0)
        , _mmc (0)
 {
@@ -292,6 +300,9 @@ Session::Session (AudioEngine &eng,
                        throw failed_constructor ();
                }
 
+               /* load default session properties - if any */
+               config.load_state();
+
        } else {
 
                if (load_state (_current_snapshot_name)) {
@@ -526,13 +537,16 @@ 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) {
@@ -543,6 +557,8 @@ Session::destroy ()
        /* not strictly necessary, but doing it here allows the shared_ptr debugging to work */
        playlists.reset ();
 
+       delete _scene_changer; _scene_changer = 0;
+
        delete _mmc; _mmc = 0;
        delete _midi_ports; _midi_ports = 0;
        delete _locations; _locations = 0;
@@ -805,6 +821,12 @@ 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.
@@ -835,6 +857,10 @@ Session::remove_monitor_section ()
 
        remove_route (_monitor_out);
        auto_connect_master_bus ();
+
+       if (auditioner) {
+               auditioner->connect ();
+       }
 }
 
 void
@@ -979,6 +1005,10 @@ Session::add_monitor_section ()
                        (*x)->enable_monitor_send ();
                }
        }
+
+       if (auditioner) {
+               auditioner->connect ();
+       }
 }
 
 void
@@ -1855,6 +1885,7 @@ Session::new_midi_track (const ChanCount& input, const ChanCount& output, boost:
 
   failed:
        if (!new_routes.empty()) {
+               StateProtector sp (this);
                add_routes (new_routes, true, true, true);
 
                if (instrument) {
@@ -1985,9 +2016,9 @@ 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,
@@ -2096,6 +2127,7 @@ Session::new_audio_track (int input_channels, int output_channels, TrackMode mod
 
   failed:
        if (!new_routes.empty()) {
+               StateProtector sp (this);
                add_routes (new_routes, true, true, true);
        }
 
@@ -2181,6 +2213,7 @@ Session::new_audio_route (int input_channels, int output_channels, RouteGroup* r
 
   failure:
        if (!ret.empty()) {
+               StateProtector sp (this);
                add_routes (ret, false, true, true); // autoconnect outputs only
        }
 
@@ -2297,6 +2330,7 @@ Session::new_route_from_template (uint32_t how_many, const std::string& template
 
   out:
        if (!ret.empty()) {
+               StateProtector sp (this);
                add_routes (ret, true, true, true);
                IO::enable_connecting ();
        }
@@ -2326,6 +2360,8 @@ Session::add_routes (RouteList& new_routes, bool input_auto_connect, bool output
                save_state (_current_snapshot_name);
        }
        
+       reassign_track_numbers();
+
        RouteAdded (new_routes); /* EMIT SIGNAL */
 }
 
@@ -2603,6 +2639,7 @@ Session::remove_route (boost::shared_ptr<Route> route)
        if (save_state (_current_snapshot_name)) {
                save_history (_current_snapshot_name);
        }
+       reassign_track_numbers();
 }
 
 void
@@ -3019,6 +3056,42 @@ Session::route_by_remote_id (uint32_t id)
        return boost::shared_ptr<Route> ((Route*) 0);
 }
 
+
+void
+Session::reassign_track_numbers ()
+{
+       int64_t tn = 0;
+       int64_t bn = 0;
+       RouteList r (*(routes.reader ()));
+       SignalOrderRouteSorter sorter;
+       r.sort (sorter);
+
+       StateProtector sp (this);
+
+       for (RouteList::iterator i = r.begin(); i != r.end(); ++i) {
+               if (boost::dynamic_pointer_cast<Track> (*i)) {
+                       (*i)->set_track_number(++tn);
+               }
+               else if (!(*i)->is_master() && !(*i)->is_monitor() && !(*i)->is_auditioner()) {
+                       (*i)->set_track_number(--bn);
+               }
+       }
+       const uint32_t decimals = ceilf (log10f (tn + 1));
+       const bool decimals_changed = _track_number_decimals != decimals;
+       _track_number_decimals = decimals;
+
+       if (decimals_changed && config.get_track_name_number ()) {
+               for (RouteList::iterator i = r.begin(); i != r.end(); ++i) {
+                       boost::shared_ptr<Track> t = boost::dynamic_pointer_cast<Track> (*i);
+                       if (t) {
+                               t->resync_track_name();
+                       }
+               }
+               // trigger GUI re-layout
+               config.ParameterChanged("track-name-number");
+       }
+}
+
 void
 Session::playlist_region_added (boost::weak_ptr<Region> w)
 {
@@ -3286,12 +3359,16 @@ 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);
 
@@ -3299,7 +3376,31 @@ 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
@@ -3320,111 +3421,6 @@ 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)
@@ -3528,6 +3524,22 @@ 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) {
@@ -3557,19 +3569,21 @@ 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;
@@ -3578,12 +3592,17 @@ 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++;
                        }
                }
@@ -3595,37 +3614,64 @@ 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> (
@@ -3886,7 +3932,7 @@ 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
@@ -4127,17 +4173,17 @@ 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;
        boost::shared_ptr<AudioFileSource> fsource;
        uint32_t x;
-       char buf[PATH_MAX+1];
        ChanCount diskstream_channels (track.n_channels());
        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();
@@ -4145,6 +4191,8 @@ Session::write_one_track (AudioTrack& track, framepos_t start, framepos_t end,
        bool need_block_size_reset = false;
        string ext;
        ChanCount const max_proc = track.max_processor_streams ();
+       string legal_playlist_name;
+       string possible_path;
 
        if (end <= start) {
                error << string_compose (_("Cannot write a range where end <= start (e.g. %1 <= %2)"),
@@ -4152,25 +4200,43 @@ 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) {
                goto out;
        }
 
+       legal_playlist_name = legalize_for_path (playlist->name());
+
        ext = native_header_format_extension (config.get_native_file_header_format(), DataType::AUDIO);
 
        for (uint32_t chan_n = 0; chan_n < diskstream_channels.n_audio(); ++chan_n) {
 
                for (x = 0; x < 99999; ++x) {
-                       snprintf (buf, sizeof(buf), "%s/%s-%d-bounce-%" PRIu32 "%s", sound_dir.c_str(), playlist->name().c_str(), chan_n, x+1, ext.c_str());
-                       if (!Glib::file_test (buf, Glib::FILE_TEST_EXISTS)) {
+                       possible_path = Glib::build_filename (sound_dir, string_compose ("%1-%2-bounce-%3%4", legal_playlist_name.c_str(), chan_n, x+1, ext.c_str()));
+                       if (!Glib::file_test (possible_path, Glib::FILE_TEST_EXISTS)) {
                                break;
                        }
                }
@@ -4182,11 +4248,11 @@ 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, false, frame_rate()));
+                               SourceFactory::createWritable (DataType::AUDIO, *this, possible_path, false, frame_rate()));
                }
 
                catch (failed_constructor& err) {
-                       error << string_compose (_("cannot create new audio file \"%1\" for %2"), buf, track.name()) << endmsg;
+                       error << string_compose (_("cannot create new audio file \"%1\" for %2"), possible_path, track.name()) << endmsg;
                        goto out;
                }
 
@@ -4199,13 +4265,17 @@ 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) {
@@ -4216,28 +4286,56 @@ 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) {
@@ -4289,8 +4387,10 @@ 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());
        }
 
@@ -4581,18 +4681,18 @@ 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 {
@@ -4600,10 +4700,10 @@ 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;
                        }
                }
@@ -4612,49 +4712,30 @@ 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;
@@ -4662,16 +4743,14 @@ 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.
@@ -4683,18 +4762,14 @@ 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;
        }
 }
@@ -4979,6 +5054,8 @@ Session::sync_order_keys ()
 
        DEBUG_TRACE (DEBUG::OrderKeys, "Sync Order Keys.\n");
 
+       reassign_track_numbers();
+
        Route::SyncOrderKeys (); /* EMIT SIGNAL */
 
        DEBUG_TRACE (DEBUG::OrderKeys, "\tsync done\n");