2 Copyright (C) 2000 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_session_h__
21 #define __ardour_session_h__
23 #include "libardour-config.h"
32 #include <boost/dynamic_bitset.hpp>
33 #include <boost/scoped_ptr.hpp>
34 #include <boost/weak_ptr.hpp>
35 #include <boost/utility.hpp>
37 #include <glibmm/thread.h>
39 #include "pbd/error.h"
40 #include "pbd/event_loop.h"
42 #include "pbd/statefuldestructible.h"
43 #include "pbd/signals.h"
46 #include "evoral/types.hpp"
48 #include "midi++/types.h"
50 #include "timecode/time.h"
52 #include "ardour/ardour.h"
53 #include "ardour/chan_count.h"
54 #include "ardour/delivery.h"
55 #include "ardour/interthread_info.h"
56 #include "ardour/rc_configuration.h"
57 #include "ardour/session_configuration.h"
58 #include "ardour/session_event.h"
59 #include "ardour/location.h"
60 #include "ardour/interpolation.h"
61 #include "ardour/route_graph.h"
63 #ifdef HAVE_JACK_SESSION
64 #include <jack/session.h>
70 typedef struct _AEffect AEffect;
80 class ControllableDescriptor;
91 class AudioFileSource;
109 class MidiClockTicker;
114 class NamedSelection;
128 class SessionDirectory;
129 class SessionMetadata;
130 class SessionPlaylists;
136 class WindowsVSTPlugin;
138 extern void setup_enum_writer ();
140 class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionList, public SessionEventManager
149 /* a new session might have non-empty mix_template, an existing session should always have an empty one.
150 the bus profile can be null if no master out bus is required.
153 Session (AudioEngine&,
154 const std::string& fullpath,
155 const std::string& snapshot_name,
156 BusProfile* bus_profile = 0,
157 std::string mix_template = "");
161 std::string path() const { return _path; }
162 std::string name() const { return _name; }
163 std::string snap_name() const { return _current_snapshot_name; }
164 std::string raid_path () const;
165 bool path_is_within_session (const std::string&);
167 void set_snap_name ();
169 bool writable() const { return _writable; }
172 bool dirty() const { return _state_of_the_state & Dirty; }
173 void set_deletion_in_progress ();
174 void clear_deletion_in_progress ();
175 bool deletion_in_progress() const { return _state_of_the_state & Deletion; }
176 PBD::Signal0<void> DirtyChanged;
178 const SessionDirectory& session_directory () const { return *(_session_dir.get()); }
180 static PBD::Signal1<void,std::string> Dialog;
182 int ensure_subdirs ();
184 std::string automation_dir () const; ///< Automation data
185 std::string analysis_dir () const; ///< Analysis data
186 std::string plugins_dir () const; ///< Plugin state
187 std::string externals_dir () const; ///< Links to external files
189 std::string peak_path (std::string) const;
191 std::string change_source_path_by_name (std::string oldpath, std::string oldname, std::string newname, bool destructive);
193 std::string peak_path_from_audio_path (std::string) const;
194 std::string new_audio_source_name (const std::string&, uint32_t nchans, uint32_t chan, bool destructive);
195 std::string new_midi_source_name (const std::string&);
196 std::string new_source_path_from_name (DataType type, const std::string&);
197 RouteList new_route_from_template (uint32_t how_many, const std::string& template_path);
199 void process (pframes_t nframes);
201 BufferSet& get_silent_buffers (ChanCount count = ChanCount::ZERO);
202 BufferSet& get_scratch_buffers (ChanCount count = ChanCount::ZERO);
203 BufferSet& get_mix_buffers (ChanCount count = ChanCount::ZERO);
205 bool have_rec_enabled_track () const;
207 bool have_captured() const { return _have_captured; }
209 void refill_all_track_buffers ();
210 Butler* butler() { return _butler; }
211 void butler_transport_work ();
213 void refresh_disk_space ();
215 int load_diskstreams_2X (XMLNode const &, int);
217 int load_routes (const XMLNode&, int);
218 boost::shared_ptr<RouteList> get_routes() const {
219 return routes.reader ();
222 boost::shared_ptr<RouteList> get_routes_with_internal_returns() const;
224 boost::shared_ptr<RouteList> get_routes_with_regions_at (framepos_t const) const;
226 uint32_t nroutes() const { return routes.reader()->size(); }
227 uint32_t ntracks () const;
228 uint32_t nbusses () const;
230 boost::shared_ptr<BundleList> bundles () {
231 return _bundles.reader ();
234 struct RoutePublicOrderSorter {
235 bool operator() (boost::shared_ptr<Route>, boost::shared_ptr<Route> b);
238 void sync_order_keys (std::string const &);
240 template<class T> void foreach_route (T *obj, void (T::*func)(Route&));
241 template<class T> void foreach_route (T *obj, void (T::*func)(boost::shared_ptr<Route>));
242 template<class T, class A> void foreach_route (T *obj, void (T::*func)(Route&, A), A arg);
244 static char session_name_is_legal (const std::string&);
245 bool io_name_is_legal (const std::string&);
246 boost::shared_ptr<Route> route_by_name (std::string);
247 boost::shared_ptr<Route> route_by_id (PBD::ID);
248 boost::shared_ptr<Route> route_by_remote_id (uint32_t id);
249 boost::shared_ptr<Track> track_by_diskstream_id (PBD::ID);
250 void routes_using_input_from (const std::string& str, RouteList& rl);
252 bool route_name_unique (std::string) const;
253 bool route_name_internal (std::string) const;
255 bool get_record_enabled() const {
256 return (record_status () >= Enabled);
259 RecordState record_status() const {
260 return (RecordState) g_atomic_int_get (&_record_status);
263 bool actively_recording () const {
264 return record_status() == Recording;
267 bool record_enabling_legal () const;
268 void maybe_enable_record ();
269 void disable_record (bool rt_context, bool force = false);
270 void step_back_from_record ();
272 void maybe_write_autosave ();
274 /* Emitted when all i/o connections are complete */
276 PBD::Signal0<void> IOConnectionsComplete;
278 /* Record status signals */
280 PBD::Signal0<void> RecordStateChanged;
282 /* Transport mechanism signals */
284 /** Emitted on the following changes in transport state:
285 * - stop (from the butler thread)
286 * - change in whether or not we are looping (from the process thread)
287 * - change in the play range (from the process thread)
288 * - start (from the process thread)
291 PBD::Signal0<void> TransportStateChange;
293 PBD::Signal1<void,framepos_t> PositionChanged; /* sent after any non-sequential motion */
294 PBD::Signal1<void,framepos_t> Xrun;
295 PBD::Signal0<void> TransportLooped;
297 /** emitted when a locate has occurred */
298 PBD::Signal0<void> Located;
300 PBD::Signal1<void,RouteList&> RouteAdded;
301 /** Emitted when a property of one of our route groups changes.
302 * The parameter is the RouteGroup that has changed.
304 PBD::Signal1<void, RouteGroup *> RouteGroupPropertyChanged;
305 /** Emitted when a route is added to one of our route groups.
306 * First parameter is the RouteGroup, second is the route.
308 PBD::Signal2<void, RouteGroup *, boost::weak_ptr<Route> > RouteAddedToRouteGroup;
309 /** Emitted when a route is removed from one of our route groups.
310 * First parameter is the RouteGroup, second is the route.
312 PBD::Signal2<void, RouteGroup *, boost::weak_ptr<Route> > RouteRemovedFromRouteGroup;
314 /* Step Editing status changed */
315 PBD::Signal1<void,bool> StepEditStatusChange;
317 void queue_event (SessionEvent*);
319 void request_roll_at_and_return (framepos_t start, framepos_t return_to);
320 void request_bounded_roll (framepos_t start, framepos_t end);
321 void request_stop (bool abort = false, bool clear_state = false);
322 void request_locate (framepos_t frame, bool with_roll = false);
324 void request_play_loop (bool yn, bool leave_rolling = false);
325 bool get_play_loop () const { return play_loop; }
327 framepos_t last_transport_start () const { return _last_roll_location; }
330 void use_rf_shuttle_speed ();
331 void allow_auto_play (bool yn);
332 void request_transport_speed (double speed);
333 void request_transport_speed_nonzero (double);
334 void request_overwrite_buffer (Track *);
335 void adjust_playback_buffering();
336 void adjust_capture_buffering();
337 void request_track_speed (Track *, double speed);
338 void request_input_change_handling ();
340 bool locate_pending() const { return static_cast<bool>(post_transport_work()&PostTransportLocate); }
341 bool transport_locked () const;
345 framepos_t current_end_frame () const;
346 framepos_t current_start_frame () const;
347 /** "actual" sample rate of session, set by current audioengine rate, pullup/down etc. */
348 framecnt_t frame_rate () const { return _current_frame_rate; }
349 /** "native" sample rate of session, regardless of current audioengine rate, pullup/down etc */
350 framecnt_t nominal_frame_rate () const { return _nominal_frame_rate; }
351 framecnt_t frames_per_hour () const { return _frames_per_hour; }
353 double frames_per_timecode_frame() const { return _frames_per_timecode_frame; }
354 framecnt_t timecode_frames_per_hour() const { return _timecode_frames_per_hour; }
356 MIDI::byte get_mtc_timecode_bits() const {
357 return mtc_timecode_bits; /* encoding of SMTPE type for MTC */
360 float timecode_frames_per_second() const;
361 bool timecode_drop_frames() const;
365 Locations *locations() { return _locations; }
367 PBD::Signal1<void,Location*> auto_loop_location_changed;
368 PBD::Signal1<void,Location*> auto_punch_location_changed;
369 PBD::Signal0<void> locations_modified;
371 void set_auto_punch_location (Location *);
372 void set_auto_loop_location (Location *);
373 int location_name(std::string& result, std::string base = std::string(""));
375 pframes_t get_block_size() const { return current_block_size; }
376 framecnt_t worst_output_latency () const { return _worst_output_latency; }
377 framecnt_t worst_input_latency () const { return _worst_input_latency; }
378 framecnt_t worst_track_latency () const { return _worst_track_latency; }
379 framecnt_t worst_playback_latency () const { return _worst_output_latency + _worst_track_latency; }
381 #ifdef HAVE_JACK_SESSION
382 void jack_session_event (jack_session_event_t* event);
384 int save_state (std::string snapshot_name, bool pending = false, bool switch_to_snapshot = false);
385 int restore_state (std::string snapshot_name);
386 int save_template (std::string template_name);
387 int save_history (std::string snapshot_name = "");
388 int restore_history (std::string snapshot_name);
389 void remove_state (std::string snapshot_name);
390 void rename_state (std::string old_name, std::string new_name);
391 void remove_pending_capture_state ();
392 int rename (const std::string&);
394 PBD::Signal1<void,std::string> StateSaved;
395 PBD::Signal0<void> StateReady;
397 std::vector<std::string*>* possible_states() const;
398 static std::vector<std::string*>* possible_states (std::string path);
400 XMLNode& get_state();
401 int set_state(const XMLNode& node, int version); // not idempotent
402 XMLNode& get_template();
404 /// The instant xml file is written to the session directory
405 void add_instant_xml (XMLNode&, bool write_to_config = true);
406 XMLNode* instant_xml (const std::string& str);
408 enum StateOfTheState {
413 InitialConnecting = 0x8,
418 StateOfTheState state_of_the_state() const { return _state_of_the_state; }
420 void add_route_group (RouteGroup *);
421 void remove_route_group (RouteGroup&);
422 void reorder_route_groups (std::list<RouteGroup*>);
424 RouteGroup* route_group_by_name (std::string);
425 RouteGroup& all_route_group() const;
427 PBD::Signal1<void,RouteGroup*> route_group_added;
428 PBD::Signal0<void> route_group_removed;
429 PBD::Signal0<void> route_groups_reordered;
431 void foreach_route_group (boost::function<void(RouteGroup*)> f) {
432 for (std::list<RouteGroup *>::iterator i = _route_groups.begin(); i != _route_groups.end(); ++i) {
437 std::list<RouteGroup*> const & route_groups () const {
438 return _route_groups;
441 /* fundamental operations. duh. */
443 std::list<boost::shared_ptr<AudioTrack> > new_audio_track (
446 TrackMode mode = Normal,
447 RouteGroup* route_group = 0,
448 uint32_t how_many = 1,
449 std::string name_template = ""
452 RouteList new_audio_route (
453 int input_channels, int output_channels, RouteGroup* route_group, uint32_t how_many, std::string name_template = ""
456 std::list<boost::shared_ptr<MidiTrack> > new_midi_track (
457 boost::shared_ptr<PluginInfo> instrument = boost::shared_ptr<PluginInfo>(),
458 TrackMode mode = Normal,
459 RouteGroup* route_group = 0, uint32_t how_many = 1, std::string name_template = ""
462 void remove_route (boost::shared_ptr<Route>);
463 void resort_routes ();
464 void resort_routes_using (boost::shared_ptr<RouteList>);
466 void set_remote_control_ids();
468 AudioEngine & engine() { return _engine; }
469 AudioEngine const & engine () const { return _engine; }
473 framepos_t transport_frame () const {return _transport_frame; }
474 framepos_t audible_frame () const;
475 framepos_t requested_return_frame() const { return _requested_return_frame; }
489 void sync_time_vars();
491 void bbt_time (framepos_t when, Timecode::BBT_Time&);
492 void timecode_to_sample(Timecode::Time& timecode, framepos_t& sample, bool use_offset, bool use_subframes) const;
493 void sample_to_timecode(framepos_t sample, Timecode::Time& timecode, bool use_offset, bool use_subframes) const;
494 void timecode_time (Timecode::Time &);
495 void timecode_time (framepos_t when, Timecode::Time&);
496 void timecode_time_subframes (framepos_t when, Timecode::Time&);
498 void timecode_duration (framecnt_t, Timecode::Time&) const;
499 void timecode_duration_string (char *, framecnt_t) const;
501 framecnt_t convert_to_frames (AnyTime const & position);
502 framecnt_t any_duration_to_frames (framepos_t position, AnyTime const & duration);
504 static PBD::Signal1<void, framepos_t> StartTimeChanged;
505 static PBD::Signal1<void, framepos_t> EndTimeChanged;
507 std::vector<SyncSource> get_available_sync_options() const;
508 void request_sync_source (Slave*);
509 bool synced_to_jack() const { return config.get_external_sync() && config.get_sync_source() == JACK; }
511 double transport_speed() const { return _transport_speed; }
512 bool transport_stopped() const { return _transport_speed == 0.0f; }
513 bool transport_rolling() const { return _transport_speed != 0.0f; }
515 void set_silent (bool yn);
516 bool silent () { return _silent; }
518 TempoMap& tempo_map() { return *_tempo_map; }
522 boost::shared_ptr<Region> find_whole_file_parent (boost::shared_ptr<Region const>) const;
524 std::string path_from_region_name (DataType type, std::string name, std::string identifier);
526 boost::shared_ptr<Region> XMLRegionFactory (const XMLNode&, bool full);
527 boost::shared_ptr<AudioRegion> XMLAudioRegionFactory (const XMLNode&, bool full);
528 boost::shared_ptr<MidiRegion> XMLMidiRegionFactory (const XMLNode&, bool full);
530 /* source management */
532 void import_audiofiles (ImportStatus&);
533 bool sample_rate_convert (ImportStatus&, std::string infile, std::string& outfile);
534 std::string build_tmp_convert_name (std::string file);
536 boost::shared_ptr<ExportHandler> get_export_handler ();
537 boost::shared_ptr<ExportStatus> get_export_status ();
539 int start_audio_export (framepos_t position, bool realtime);
541 PBD::Signal1<int, framecnt_t> ProcessExport;
542 static PBD::Signal2<void,std::string, std::string> Exported;
544 void add_source (boost::shared_ptr<Source>);
545 void remove_source (boost::weak_ptr<Source>);
547 void cleanup_regions();
548 int cleanup_sources (CleanupReport&);
549 int cleanup_trash_sources (CleanupReport&);
551 int destroy_sources (std::list<boost::shared_ptr<Source> >);
553 int remove_last_capture ();
555 /** handlers should return -1 for "stop cleanup",
556 0 for "yes, delete this playlist",
557 1 for "no, don't delete this playlist".
559 static PBD::Signal1<int,boost::shared_ptr<Playlist> > AskAboutPlaylistDeletion;
561 /** handlers should return 0 for "ignore the rate mismatch",
562 !0 for "do not use this session"
564 static PBD::Signal2<int, framecnt_t, framecnt_t> AskAboutSampleRateMismatch;
566 /** handlers should return !0 for use pending state, 0 for ignore it.
568 static PBD::Signal0<int> AskAboutPendingState;
570 boost::shared_ptr<AudioFileSource> create_audio_source_for_session (
571 size_t, std::string const &, uint32_t, bool destructive);
573 boost::shared_ptr<MidiSource> create_midi_source_for_session (
574 Track*, std::string const &);
576 boost::shared_ptr<Source> source_by_id (const PBD::ID&);
577 boost::shared_ptr<Source> source_by_path_and_channel (const std::string&, uint16_t);
578 uint32_t count_sources_by_origin (const std::string&);
580 void add_playlist (boost::shared_ptr<Playlist>, bool unused = false);
582 /* named selections */
584 boost::shared_ptr<NamedSelection> named_selection_by_name (std::string name);
585 void add_named_selection (boost::shared_ptr<NamedSelection>);
586 void remove_named_selection (boost::shared_ptr<NamedSelection>);
588 template<class T> void foreach_named_selection (T& obj, void (T::*func)(boost::shared_ptr<NamedSelection>));
589 PBD::Signal0<void> NamedSelectionAdded;
590 PBD::Signal0<void> NamedSelectionRemoved;
592 /* Curves and AutomationLists (TODO when they go away) */
593 void add_automation_list(AutomationList*);
597 boost::shared_ptr<Auditioner> the_auditioner() { return auditioner; }
598 void audition_playlist ();
599 void audition_region (boost::shared_ptr<Region>);
600 void cancel_audition ();
601 bool is_auditioning () const;
603 PBD::Signal1<void,bool> AuditionActive;
605 /* flattening stuff */
607 boost::shared_ptr<Region> write_one_track (AudioTrack&, framepos_t start, framepos_t end,
608 bool overwrite, std::vector<boost::shared_ptr<Source> >&, InterThreadInfo& wot,
609 boost::shared_ptr<Processor> endpoint, bool include_endpoint, bool for_export);
610 int freeze_all (InterThreadInfo&);
612 /* session-wide solo/mute/rec-enable */
614 bool soloing() const { return _non_soloed_outs_muted; }
615 bool listening() const { return _listen_cnt > 0; }
616 bool solo_isolated() const { return _solo_isolated_cnt > 0; }
618 static const SessionEvent::RTeventCallback rt_cleanup;
620 void set_solo (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
621 void set_just_one_solo (boost::shared_ptr<Route>, bool, SessionEvent::RTeventCallback after = rt_cleanup);
622 void cancel_solo_after_disconnect (boost::shared_ptr<Route>, bool upstream, SessionEvent::RTeventCallback after = rt_cleanup);
623 void set_mute (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
624 void set_listen (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
625 void set_record_enabled (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
626 void set_solo_isolated (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
627 void set_exclusive_input_active (boost::shared_ptr<Route> rt, bool others_on);
628 void set_monitoring (boost::shared_ptr<RouteList>, MonitorChoice, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
630 PBD::Signal1<void,bool> SoloActive;
631 PBD::Signal0<void> SoloChanged;
632 PBD::Signal0<void> IsolatedChanged;
634 /* monitor/master out */
636 void add_monitor_section ();
637 void remove_monitor_section ();
639 boost::shared_ptr<Route> monitor_out() const { return _monitor_out; }
640 boost::shared_ptr<Route> master_out() const { return _master_out; }
642 void globally_add_internal_sends (boost::shared_ptr<Route> dest, Placement p, bool);
643 void globally_set_send_gains_from_track (boost::shared_ptr<Route> dest);
644 void globally_set_send_gains_to_zero (boost::shared_ptr<Route> dest);
645 void globally_set_send_gains_to_unity (boost::shared_ptr<Route> dest);
646 void add_internal_sends (boost::shared_ptr<Route> dest, Placement p, boost::shared_ptr<RouteList> senders);
647 void add_internal_send (boost::shared_ptr<Route>, int, boost::shared_ptr<Route>);
648 void add_internal_send (boost::shared_ptr<Route>, boost::shared_ptr<Processor>, boost::shared_ptr<Route>);
650 static void set_disable_all_loaded_plugins (bool yn) {
651 _disable_all_loaded_plugins = yn;
653 static bool get_disable_all_loaded_plugins() {
654 return _disable_all_loaded_plugins;
657 uint32_t next_send_id();
658 uint32_t next_aux_send_id();
659 uint32_t next_return_id();
660 uint32_t next_insert_id();
661 void mark_send_id (uint32_t);
662 void mark_aux_send_id (uint32_t);
663 void mark_return_id (uint32_t);
664 void mark_insert_id (uint32_t);
665 void unmark_send_id (uint32_t);
666 void unmark_aux_send_id (uint32_t);
667 void unmark_return_id (uint32_t);
668 void unmark_insert_id (uint32_t);
670 /* s/w "RAID" management */
672 framecnt_t available_capture_duration();
676 void add_bundle (boost::shared_ptr<Bundle>);
677 void remove_bundle (boost::shared_ptr<Bundle>);
678 boost::shared_ptr<Bundle> bundle_by_name (std::string) const;
680 PBD::Signal1<void,boost::shared_ptr<Bundle> > BundleAdded;
681 PBD::Signal1<void,boost::shared_ptr<Bundle> > BundleRemoved;
685 /* History (for editors, mixers, UIs etc.) */
687 /** Undo some transactions.
688 * @param n Number of transactions to undo.
690 void undo (uint32_t n) {
694 void redo (uint32_t n) {
698 UndoHistory& history() { return _history; }
700 uint32_t undo_depth() const { return _history.undo_depth(); }
701 uint32_t redo_depth() const { return _history.redo_depth(); }
702 std::string next_undo() const { return _history.next_undo(); }
703 std::string next_redo() const { return _history.next_redo(); }
705 void begin_reversible_command (const std::string& cmd_name);
706 void begin_reversible_command (GQuark);
707 void commit_reversible_command (Command* cmd = 0);
709 void add_command (Command *const cmd) {
710 assert (_current_trans);
711 _current_trans->add_command (cmd);
714 /** @return The list of operations that are currently in progress */
715 std::list<GQuark> const & current_operations () {
716 return _current_trans_quarks;
719 void add_commands (std::vector<Command*> const & cmds);
721 std::map<PBD::ID,PBD::StatefulDestructible*> registry;
723 // these commands are implemented in libs/ardour/session_command.cc
724 Command* memento_command_factory(XMLNode* n);
725 Command* stateful_diff_command_factory (XMLNode *);
726 void register_with_memento_command_factory(PBD::ID, PBD::StatefulDestructible*);
730 boost::shared_ptr<IO> click_io() { return _click_io; }
731 boost::shared_ptr<Amp> click_gain() { return _click_gain; }
733 /* disk, buffer loads */
735 uint32_t playback_load ();
736 uint32_t capture_load ();
740 void request_play_range (std::list<AudioRange>*, bool leave_rolling = false);
741 bool get_play_range () const { return _play_range; }
743 /* buffers for gain and pan */
745 gain_t* gain_automation_buffer () const;
746 pan_t** pan_automation_buffer () const;
748 void ensure_buffer_set (BufferSet& buffers, const ChanCount& howmany);
752 static intptr_t vst_callback (
761 static PBD::Signal0<void> SendFeedback;
765 boost::shared_ptr<Speakers> get_speakers ();
769 boost::shared_ptr<PBD::Controllable> controllable_by_id (const PBD::ID&);
770 boost::shared_ptr<PBD::Controllable> controllable_by_descriptor (const PBD::ControllableDescriptor&);
772 void add_controllable (boost::shared_ptr<PBD::Controllable>);
773 void remove_controllable (PBD::Controllable*);
775 boost::shared_ptr<PBD::Controllable> solo_cut_control() const;
777 SessionConfiguration config;
779 bool exporting () const {
783 /* this is a private enum, but setup_enum_writer() needs it,
784 and i can't find a way to give that function
788 enum PostTransportWork {
789 PostTransportStop = 0x1,
790 PostTransportDuration = 0x2,
791 PostTransportLocate = 0x4,
792 PostTransportRoll = 0x8,
793 PostTransportAbort = 0x10,
794 PostTransportOverWrite = 0x20,
795 PostTransportSpeed = 0x40,
796 PostTransportAudition = 0x80,
797 PostTransportReverse = 0x100,
798 PostTransportInputChange = 0x200,
799 PostTransportCurveRealloc = 0x400,
800 PostTransportClearSubstate = 0x800,
801 PostTransportAdjustPlaybackBuffering = 0x1000,
802 PostTransportAdjustCaptureBuffering = 0x2000
811 SlaveState slave_state() const { return _slave_state; }
813 boost::shared_ptr<SessionPlaylists> playlists;
815 void send_mmc_locate (framepos_t);
816 int send_full_time_code (framepos_t);
818 PBD::Signal0<void> RouteOrderKeyChanged;
820 bool step_editing() const { return (_step_editors > 0); }
822 void request_suspend_timecode_transmission ();
823 void request_resume_timecode_transmission ();
824 bool timecode_transmission_suspended () const;
826 std::string source_search_path(DataType) const;
827 void ensure_search_path_includes (const std::string& path, DataType type);
829 std::list<std::string> unknown_processors () const;
831 /** Emitted when a feedback cycle has been detected within Ardour's signal
832 processing path. Until it is fixed (by the user) some (unspecified)
833 routes will not be run.
835 static PBD::Signal0<void> FeedbackDetected;
837 /** Emitted when a graph sort has successfully completed, which means
838 that it has no feedback cycles.
840 static PBD::Signal0<void> SuccessfulGraphSort;
842 /* handlers can return an integer value:
843 0: config.set_audio_search_path() or config.set_midi_search_path() was used
844 to modify the search path and we should try to find it again.
845 1: quit entire session load
846 2: as 0, but don't ask about other missing files
847 3: don't ask about other missing files, and just mark this one missing
848 -1: just mark this one missing
849 any other value: as -1
851 static PBD::Signal3<int,Session*,std::string,DataType> MissingFile;
853 /** Emitted when the session wants Ardour to quit */
854 static PBD::Signal0<void> Quit;
857 friend class AudioEngine;
858 void set_block_size (pframes_t nframes);
859 void set_frame_rate (framecnt_t nframes);
863 void schedule_curve_reallocation ();
864 void update_latency_compensation (bool force = false);
867 int create (const std::string& mix_template, BusProfile*);
871 PendingDeclickIn = 0x1,
872 PendingDeclickOut = 0x2,
873 StopPendingCapture = 0x4,
874 PendingLocate = 0x20,
877 /* stuff used in process() should be close together to
881 typedef void (Session::*process_function_type)(pframes_t);
883 AudioEngine& _engine;
884 mutable gint processing_prohibited;
885 process_function_type process_function;
886 process_function_type last_process_function;
887 bool waiting_for_sync_offset;
888 framecnt_t _base_frame_rate;
889 framecnt_t _current_frame_rate; //this includes video pullup offset
890 framecnt_t _nominal_frame_rate; //ignores audioengine setting, "native" SR
891 int transport_sub_state;
892 mutable gint _record_status;
893 framepos_t _transport_frame;
894 Location* _session_range_location; ///< session range, or 0 if there is nothing in the session yet
898 void maybe_update_session_range (framepos_t, framepos_t);
900 // varispeed playback
901 double _transport_speed;
902 double _last_transport_speed;
903 double _target_transport_speed;
904 CubicInterpolation interpolation;
906 bool auto_play_legal;
907 framepos_t _last_slave_transport_frame;
908 framecnt_t maximum_output_latency;
909 framepos_t _requested_return_frame;
910 pframes_t current_block_size;
911 framecnt_t _worst_output_latency;
912 framecnt_t _worst_input_latency;
913 framecnt_t _worst_track_latency;
916 float _meter_falloff;
917 bool _non_soloed_outs_muted;
918 uint32_t _listen_cnt;
919 uint32_t _solo_isolated_cnt;
923 void initialize_latencies ();
924 void set_worst_io_latencies ();
925 void set_worst_playback_latency ();
926 void set_worst_capture_latency ();
927 void set_worst_io_latencies_x (IOChange, void *) {
928 set_worst_io_latencies ();
930 void post_capture_latency ();
931 void post_playback_latency ();
933 void update_latency_compensation_proxy (void* ignored);
935 void ensure_buffers (ChanCount howmany = ChanCount::ZERO);
937 void process_scrub (pframes_t);
938 void process_without_events (pframes_t);
939 void process_with_events (pframes_t);
940 void process_audition (pframes_t);
941 void process_export (pframes_t);
942 int process_export_fw (pframes_t);
944 void block_processing() { g_atomic_int_set (&processing_prohibited, 1); }
945 void unblock_processing() { g_atomic_int_set (&processing_prohibited, 0); }
946 bool processing_blocked() const { return g_atomic_int_get (&processing_prohibited); }
950 static const int delta_accumulator_size = 25;
951 int delta_accumulator_cnt;
952 int32_t delta_accumulator[delta_accumulator_size];
953 int32_t average_slave_delta;
955 bool have_first_delta_accumulator;
957 SlaveState _slave_state;
958 framepos_t slave_wait_end;
960 void reset_slave_state ();
961 bool follow_slave (pframes_t);
962 void calculate_moving_average_of_slave_delta (int dir, framecnt_t this_delta);
963 void track_slave_state (float slave_speed, framepos_t slave_transport_frame, framecnt_t this_delta);
964 void follow_slave_silently (pframes_t nframes, float slave_speed);
966 void switch_to_sync_source (SyncSource); /* !RT context */
967 void drop_sync_source (); /* !RT context */
968 void use_sync_source (Slave*); /* RT context */
970 bool post_export_sync;
971 framepos_t post_export_position;
974 bool _export_rolling;
976 boost::shared_ptr<ExportHandler> export_handler;
977 boost::shared_ptr<ExportStatus> export_status;
980 int stop_audio_export ();
981 void finalize_audio_export ();
982 bool _pre_export_mmc_enabled;
984 PBD::ScopedConnection export_freewheel_connection;
986 void get_track_statistics ();
987 int process_routes (pframes_t, bool& need_butler);
988 int silent_process_routes (pframes_t, bool& need_butler);
990 int get_transport_declick_required () {
991 if (transport_sub_state & PendingDeclickIn) {
992 transport_sub_state &= ~PendingDeclickIn;
994 } else if (transport_sub_state & PendingDeclickOut) {
1001 bool maybe_stop (framepos_t limit);
1002 bool maybe_sync_start (pframes_t &);
1004 void check_declick_out ();
1010 /** Number of process frames since the last MTC output (when sending MTC); used to
1011 * know when to send full MTC messages every so often.
1013 pframes_t _pframes_since_last_mtc;
1014 bool session_midi_feedback;
1017 framepos_t last_loopend;
1019 boost::scoped_ptr<SessionDirectory> _session_dir;
1022 void when_engine_running ();
1023 void graph_reordered ();
1025 /** current snapshot name, without the .ardour suffix */
1026 std::string _current_snapshot_name;
1028 XMLTree* state_tree;
1029 bool state_was_pending;
1030 StateOfTheState _state_of_the_state;
1033 int load_options (const XMLNode&);
1034 int load_state (std::string snapshot_name);
1036 framepos_t _last_roll_location;
1037 framepos_t _last_roll_or_reversal_location;
1038 framepos_t _last_record_location;
1040 bool pending_locate_roll;
1041 framepos_t pending_locate_frame;
1042 bool pending_locate_flush;
1044 bool pending_auto_loop;
1048 static const PostTransportWork ProcessCannotProceedMask =
1050 PostTransportInputChange|
1052 PostTransportReverse|
1053 PostTransportCurveRealloc|
1054 PostTransportAudition|
1055 PostTransportLocate|
1057 PostTransportClearSubstate);
1059 gint _post_transport_work; /* accessed only atomic ops */
1060 PostTransportWork post_transport_work() const { return (PostTransportWork) g_atomic_int_get (&_post_transport_work); }
1061 void set_post_transport_work (PostTransportWork ptw) { g_atomic_int_set (&_post_transport_work, (gint) ptw); }
1062 void add_post_transport_work (PostTransportWork ptw);
1064 void schedule_playback_buffering_adjustment ();
1065 void schedule_capture_buffering_adjustment ();
1067 uint32_t cumulative_rf_motion;
1070 void set_rf_speed (float speed);
1071 void reset_rf_scale (framecnt_t frames_moved);
1073 Locations* _locations;
1074 void locations_changed ();
1075 void locations_added (Location*);
1076 void handle_locations_changed (Locations::LocationList&);
1078 PBD::ScopedConnectionList punch_connections;
1079 void auto_punch_start_changed (Location *);
1080 void auto_punch_end_changed (Location *);
1081 void auto_punch_changed (Location *);
1083 PBD::ScopedConnectionList loop_connections;
1084 void auto_loop_changed (Location *);
1086 void first_stage_init (std::string path, std::string snapshot_name);
1087 int second_stage_init ();
1088 void remove_empty_sounds ();
1090 void setup_midi_control ();
1091 int midi_read (MIDI::Port *);
1093 void enable_record ();
1095 void increment_transport_position (framecnt_t val) {
1096 if (max_framepos - val < _transport_frame) {
1097 _transport_frame = max_framepos;
1099 _transport_frame += val;
1103 void decrement_transport_position (framecnt_t val) {
1104 if (val < _transport_frame) {
1105 _transport_frame -= val;
1107 _transport_frame = 0;
1111 void post_transport_motion ();
1112 static void *session_loader_thread (void *arg);
1116 /* SessionEventManager interface */
1118 void process_event (SessionEvent*);
1119 void set_next_event ();
1120 void cleanup_event (SessionEvent*,int);
1122 /* MIDI Machine Control */
1125 void spp_continue ();
1128 void mmc_deferred_play (MIDI::MachineControl &);
1129 void mmc_stop (MIDI::MachineControl &);
1130 void mmc_step (MIDI::MachineControl &, int);
1131 void mmc_pause (MIDI::MachineControl &);
1132 void mmc_record_pause (MIDI::MachineControl &);
1133 void mmc_record_strobe (MIDI::MachineControl &);
1134 void mmc_record_exit (MIDI::MachineControl &);
1135 void mmc_track_record_status (MIDI::MachineControl &, uint32_t track, bool enabled);
1136 void mmc_fast_forward (MIDI::MachineControl &);
1137 void mmc_rewind (MIDI::MachineControl &);
1138 void mmc_locate (MIDI::MachineControl &, const MIDI::byte *);
1139 void mmc_shuttle (MIDI::MachineControl &mmc, float speed, bool forw);
1140 void mmc_record_enable (MIDI::MachineControl &mmc, size_t track, bool enabled);
1142 struct timeval last_mmc_step;
1145 typedef boost::function<bool()> MidiTimeoutCallback;
1146 typedef std::list<MidiTimeoutCallback> MidiTimeoutList;
1148 MidiTimeoutList midi_timeouts;
1149 bool mmc_step_timeout ();
1151 MIDI::byte mtc_msg[16];
1152 MIDI::byte mtc_timecode_bits; /* encoding of SMTPE type for MTC */
1153 MIDI::byte midi_msg[16];
1154 framepos_t outbound_mtc_timecode_frame;
1155 Timecode::Time transmitting_timecode_time;
1156 int next_quarter_frame_to_send;
1158 double _frames_per_timecode_frame; /* has to be floating point because of drop frame */
1159 framecnt_t _frames_per_hour;
1160 framecnt_t _timecode_frames_per_hour;
1162 /* cache the most-recently requested time conversions. This helps when we
1163 * have multiple clocks showing the same time (e.g. the transport frame) */
1164 bool last_timecode_valid;
1165 framepos_t last_timecode_when;
1166 Timecode::Time last_timecode;
1168 bool _send_timecode_update; ///< Flag to send a full frame (Timecode) MTC message this cycle
1170 int send_midi_time_code_for_cycle (framepos_t, framepos_t, pframes_t nframes);
1172 void reset_record_status ();
1174 int no_roll (pframes_t nframes);
1175 int fail_roll (pframes_t nframes);
1177 bool non_realtime_work_pending() const { return static_cast<bool>(post_transport_work()); }
1178 bool process_can_proceed() const { return !(post_transport_work() & ProcessCannotProceedMask); }
1180 MidiControlUI* midi_control_ui;
1182 int start_midi_thread ();
1184 void set_play_loop (bool yn);
1185 void unset_play_loop ();
1186 void overwrite_some_buffers (Track *);
1187 void flush_all_inserts ();
1188 int micro_locate (framecnt_t distance);
1189 void locate (framepos_t, bool with_roll, bool with_flush, bool with_loop=false, bool force=false, bool with_mmc=true);
1190 void start_locate (framepos_t, bool with_roll, bool with_flush, bool with_loop=false, bool force=false);
1191 void force_locate (framepos_t frame, bool with_roll = false);
1192 void set_track_speed (Track *, double speed);
1193 void set_transport_speed (double speed, bool abort = false, bool clear_state = false);
1194 void stop_transport (bool abort = false, bool clear_state = false);
1195 void start_transport ();
1196 void realtime_stop (bool abort, bool clear_state);
1197 void realtime_locate ();
1198 void non_realtime_start_scrub ();
1199 void non_realtime_set_speed ();
1200 void non_realtime_locate ();
1201 void non_realtime_stop (bool abort, int entry_request_count, bool& finished);
1202 void non_realtime_overwrite (int entry_request_count, bool& finished);
1203 void post_transport ();
1204 void engine_halted ();
1205 void xrun_recovery ();
1207 TempoMap *_tempo_map;
1208 void tempo_map_changed (const PBD::PropertyChange&);
1210 /* edit/mix groups */
1212 int load_route_groups (const XMLNode&, int);
1214 std::list<RouteGroup *> _route_groups;
1215 RouteGroup* _all_route_group;
1219 boost::shared_ptr<Graph> _process_graph;
1221 SerializedRCUManager<RouteList> routes;
1223 void add_routes (RouteList&, bool input_auto_connect, bool output_auto_connect, bool save);
1224 uint32_t destructive_index;
1226 boost::shared_ptr<Route> XMLRouteFactory (const XMLNode&, int);
1227 boost::shared_ptr<Route> XMLRouteFactory_2X (const XMLNode&, int);
1229 void route_processors_changed (RouteProcessorChange);
1231 bool find_route_name (std::string const &, uint32_t& id, char* name, size_t name_len, bool);
1232 void count_existing_track_channels (ChanCount& in, ChanCount& out);
1233 void auto_connect_route (boost::shared_ptr<Route> route, ChanCount& existing_inputs, ChanCount& existing_outputs,
1234 bool with_lock, bool connect_inputs = true,
1235 ChanCount input_start = ChanCount (), ChanCount output_start = ChanCount ());
1236 void midi_output_change_handler (IOChange change, void* /*src*/, boost::weak_ptr<Route> midi_track);
1240 bool solo_update_disabled;
1242 void route_listen_changed (void *src, boost::weak_ptr<Route>);
1243 void route_mute_changed (void *src);
1244 void route_solo_changed (bool self_solo_change, void *src, boost::weak_ptr<Route>);
1245 void route_solo_isolated_changed (void *src, boost::weak_ptr<Route>);
1246 void update_route_solo_state (boost::shared_ptr<RouteList> r = boost::shared_ptr<RouteList>());
1248 void listen_position_changed ();
1249 void solo_control_mode_changed ();
1251 /* REGION MANAGEMENT */
1253 mutable Glib::Mutex region_lock;
1255 int load_regions (const XMLNode& node);
1256 int load_compounds (const XMLNode& node);
1258 void route_added_to_route_group (RouteGroup *, boost::weak_ptr<Route>);
1259 void route_removed_from_route_group (RouteGroup *, boost::weak_ptr<Route>);
1260 void route_group_property_changed (RouteGroup *);
1264 mutable Glib::Mutex source_lock;
1267 typedef std::map<PBD::ID,boost::shared_ptr<Source> > SourceMap;
1273 SourceMap get_sources() { return sources; }
1276 int load_sources (const XMLNode& node);
1277 XMLNode& get_sources_as_xml ();
1279 boost::shared_ptr<Source> XMLSourceFactory (const XMLNode&);
1283 void remove_playlist (boost::weak_ptr<Playlist>);
1284 void track_playlist_changed (boost::weak_ptr<Track>);
1285 void playlist_region_added (boost::weak_ptr<Region>);
1286 void playlist_ranges_moved (std::list<Evoral::RangeMove<framepos_t> > const &);
1287 void playlist_regions_extended (std::list<Evoral::Range<framepos_t> > const &);
1289 /* NAMED SELECTIONS */
1291 mutable Glib::Mutex named_selection_lock;
1292 typedef std::set<boost::shared_ptr<NamedSelection> > NamedSelectionList;
1293 NamedSelectionList named_selections;
1295 int load_named_selections (const XMLNode&);
1297 NamedSelection *named_selection_factory (std::string name);
1298 NamedSelection *XMLNamedSelectionFactory (const XMLNode&);
1300 /* CURVES and AUTOMATION LISTS */
1301 std::map<PBD::ID, AutomationList*> automation_lists;
1303 /* DEFAULT FADE CURVES */
1305 float default_fade_steepness;
1306 float default_fade_msecs;
1310 boost::shared_ptr<Auditioner> auditioner;
1311 void set_audition (boost::shared_ptr<Region>);
1312 void non_realtime_set_audition ();
1313 boost::shared_ptr<Region> pending_audition_region;
1319 int flatten_one_track (AudioTrack&, framepos_t start, framecnt_t cnt);
1321 /* INSERT AND SEND MANAGEMENT */
1323 boost::dynamic_bitset<uint32_t> send_bitset;
1324 boost::dynamic_bitset<uint32_t> aux_send_bitset;
1325 boost::dynamic_bitset<uint32_t> return_bitset;
1326 boost::dynamic_bitset<uint32_t> insert_bitset;
1330 struct space_and_path {
1331 uint32_t blocks; /* 4kB blocks */
1339 struct space_and_path_ascending_cmp {
1340 bool operator() (space_and_path a, space_and_path b) {
1341 return a.blocks > b.blocks;
1345 void setup_raid_path (std::string path);
1347 std::vector<space_and_path> session_dirs;
1348 std::vector<space_and_path>::iterator last_rr_session_dir;
1349 uint32_t _total_free_4k_blocks;
1350 Glib::Mutex space_lock;
1352 bool no_questions_about_missing_files;
1354 std::string get_best_session_directory_for_new_source ();
1356 mutable gint _playback_load;
1357 mutable gint _capture_load;
1361 SerializedRCUManager<BundleList> _bundles;
1362 XMLNode* _bundle_xml_node;
1363 int load_bundles (XMLNode const &);
1365 UndoHistory _history;
1366 /** current undo transaction, or 0 */
1367 UndoTransaction* _current_trans;
1368 /** GQuarks to describe the reversible commands that are currently in progress.
1369 * These may be nested, in which case more recently-started commands are toward
1370 * the front of the list.
1372 std::list<GQuark> _current_trans_quarks;
1374 void jack_timebase_callback (jack_transport_state_t, pframes_t, jack_position_t*, int);
1375 int jack_sync_callback (jack_transport_state_t, jack_position_t*);
1376 void reset_jack_connection (jack_client_t* jack);
1377 void process_rtop (SessionEvent*);
1379 void update_latency (bool playback);
1381 XMLNode& state(bool);
1384 typedef std::list<Click*> Clicks;
1387 boost::shared_ptr<IO> _click_io;
1388 boost::shared_ptr<Amp> _click_gain;
1390 Sample* click_emphasis_data;
1391 framecnt_t click_length;
1392 framecnt_t click_emphasis_length;
1393 mutable Glib::RWLock click_lock;
1395 static const Sample default_click[];
1396 static const framecnt_t default_click_length;
1397 static const Sample default_click_emphasis[];
1398 static const framecnt_t default_click_emphasis_length;
1401 framepos_t _clicks_cleared;
1402 void setup_click_sounds (int which);
1403 void setup_click_sounds (Sample**, Sample const *, framecnt_t*, framecnt_t, std::string const &);
1404 void clear_clicks ();
1405 void click (framepos_t start, framecnt_t nframes);
1407 std::vector<Route*> master_outs;
1409 /* range playback */
1411 std::list<AudioRange> current_audio_range;
1413 void set_play_range (std::list<AudioRange>&, bool leave_rolling);
1414 void unset_play_range ();
1419 boost::shared_ptr<Route> _master_out;
1420 boost::shared_ptr<Route> _monitor_out;
1422 void auto_connect_master_bus ();
1424 /* Windows VST support */
1426 long _windows_vst_callback (
1435 /* number of hardware ports we're using,
1436 based on max (requested,available)
1439 ChanCount n_physical_outputs;
1440 ChanCount n_physical_inputs;
1442 int find_all_sources (std::string path, std::set<std::string>& result);
1443 int find_all_sources_across_snapshots (std::set<std::string>& result, bool exclude_this_snapshot);
1445 typedef std::set<boost::shared_ptr<PBD::Controllable> > Controllables;
1446 Glib::Mutex controllables_lock;
1447 Controllables controllables;
1449 boost::shared_ptr<PBD::Controllable> _solo_cut_control;
1451 void reset_native_file_format();
1452 bool first_file_data_format_reset;
1453 bool first_file_header_format_reset;
1455 void config_changed (std::string, bool);
1457 XMLNode& get_control_protocol_state ();
1459 void set_history_depth (uint32_t depth);
1460 void sync_order_keys ();
1462 static bool _disable_all_loaded_plugins;
1464 mutable bool have_looped; ///< Used in ::audible_frame(*)
1466 void update_have_rec_enabled_track ();
1467 gint _have_rec_enabled_track;
1469 static int ask_about_playlist_deletion (boost::shared_ptr<Playlist>);
1471 /* realtime "apply to set of routes" operations */
1472 template<typename T> SessionEvent*
1473 get_rt_event (boost::shared_ptr<RouteList> rl, T targ, SessionEvent::RTeventCallback after, bool group_override,
1474 void (Session::*method) (boost::shared_ptr<RouteList>, T, bool)) {
1475 SessionEvent* ev = new SessionEvent (SessionEvent::RealTimeOperation, SessionEvent::Add, SessionEvent::Immediate, 0, 0.0);
1476 ev->rt_slot = boost::bind (method, this, rl, targ, group_override);
1477 ev->rt_return = after;
1478 ev->event_loop = PBD::EventLoop::get_event_loop_for_thread ();
1483 void rt_cancel_solo_after_disconnect (boost::shared_ptr<RouteList>, bool upstream, bool /* ignored*/ );
1484 void rt_set_solo (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1485 void rt_set_just_one_solo (boost::shared_ptr<RouteList>, bool yn, bool /* ignored*/ );
1486 void rt_set_mute (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1487 void rt_set_listen (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1488 void rt_set_solo_isolated (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1489 void rt_set_record_enabled (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1490 void rt_set_monitoring (boost::shared_ptr<RouteList>, MonitorChoice, bool group_override);
1492 /** temporary list of Diskstreams used only during load of 2.X sessions */
1493 std::list<boost::shared_ptr<Diskstream> > _diskstreams_2X;
1495 void add_session_range_location (framepos_t, framepos_t);
1497 void setup_midi_machine_control ();
1499 void route_order_key_changed ();
1501 void step_edit_status_change (bool);
1502 uint32_t _step_editors;
1504 /** true if timecode transmission by the transport is suspended, otherwise false */
1505 mutable gint _suspend_timecode_transmission;
1507 void update_locations_after_tempo_map_change (Locations::LocationList &);
1509 void start_time_changed (framepos_t);
1510 void end_time_changed (framepos_t);
1512 void set_track_monitor_input_status (bool);
1513 framepos_t compute_stop_limit () const;
1515 boost::shared_ptr<Speakers> _speakers;
1516 void load_nested_sources (const XMLNode& node);
1518 /** The directed graph of routes that is currently being used for audio processing
1519 and solo/mute computations.
1521 GraphEdges _current_route_graph;
1523 uint32_t next_control_id () const;
1524 bool ignore_route_processor_changes;
1526 MidiClockTicker* midi_clock;
1529 } // namespace ARDOUR
1531 #endif /* __ardour_session_h__ */