libs/ardour/ardour/session.h

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   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.
   8
   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.
  13
  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.
  17
  18 */
  19
  20 #ifndef __ardour_session_h__
  21 #define __ardour_session_h__
  22
  23 #include <list>
  24 #include <map>
  25 #include <set>
  26 #include <stack>
  27 #include <string>
  28 #include <vector>
  29 #include <stdint.h>
  30
  31 #include <boost/dynamic_bitset.hpp>
  32 #include <boost/scoped_ptr.hpp>
  33 #include <boost/weak_ptr.hpp>
  34 #include <boost/utility.hpp>
  35
  36 #include <glibmm/thread.h>
  37
  38 #include "pbd/error.h"
  39 #include "pbd/rcu.h"
  40 #include "pbd/statefuldestructible.h"
  41 #include "pbd/signals.h"
  42 #include "pbd/undo.h"
  43
  44 #include "midi++/types.h"
  45
  46 #include "ardour/ardour.h"
  47 #include "ardour/click.h"
  48 #include "ardour/chan_count.h"
  49 #include "ardour/rc_configuration.h"
  50 #include "ardour/session_configuration.h"
  51 #include "ardour/session_event.h"
  52 #include "ardour/location.h"
  53 #include "ardour/timecode.h"
  54 #include "ardour/interpolation.h"
  55
  56 #ifdef HAVE_JACK_SESSION
  57 #include <jack/session.h>
  58 #endif
  59
  60 class XMLTree;
  61 class XMLNode;
  62 class AEffect;
  63
  64 namespace MIDI {
  65         class Port;
  66         class MachineControl;
  67         class Parser;
  68 }
  69
  70 namespace PBD {
  71         class Controllable;
  72         class ControllableDescriptor;
  73 }
  74
  75 namespace Evoral {
  76         class Curve;
  77 }
  78
  79 namespace ARDOUR {
  80
  81 class AudioEngine;
  82 class AudioFileSource;
  83 class AudioRegion;
  84 class AudioSource;
  85 class AudioTrack;
  86 class Auditioner;
  87 class AutomationList;
  88 class AuxInput;
  89 class BufferSet;
  90 class Bundle;
  91 class Butler;
  92 class ControlProtocolInfo;
  93 class Diskstream;
  94 class ExportHandler;
  95 class ExportStatus;
  96 class IO;
  97 class IOProcessor;
  98 class ImportStatus;
  99 class MidiRegion;
 100 class MidiSource;
 101 class MidiTrack;
 102 class MidiControlUI;
 103 class NamedSelection;
 104 class Playlist;
 105 class PluginInsert;
 106 class Port;
 107 class PortInsert;
 108 class ProcessThread;
 109 class Processor;
 110 class Region;
 111 class Return;
 112 class Route;
 113 class RouteGroup;
 114 class SMFSource;
 115 class Send;
 116 class SessionDirectory;
 117 class SessionMetadata;
 118 class SessionPlaylists;
 119 class Slave;
 120 class Source;
 121 class TempoMap;
 122 class VSTPlugin;
 123 class Graph;
 124 class Track;
 125
 126 extern void setup_enum_writer ();
 127
 128 class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionList, public SessionEventManager
 129 {
 130   public:
 131         enum RecordState {
 132                 Disabled = 0,
 133                 Enabled = 1,
 134                 Recording = 2
 135         };
 136
 137         /* a new session might have non-empty mix_template, an existing session should always have an empty one.
 138            the bus profile can be null if no master out bus is required.
 139          */
 140
 141         Session (AudioEngine&,
 142                  const std::string& fullpath,
 143                  const std::string& snapshot_name,
 144                  BusProfile* bus_profile = 0,
 145                  std::string mix_template = "");
 146
 147         virtual ~Session ();
 148
 149         std::string path() const { return _path; }
 150         std::string name() const { return _name; }
 151         std::string snap_name() const { return _current_snapshot_name; }
 152         std::string raid_path () const;
 153         bool path_is_within_session (const std::string&);
 154
 155         void set_snap_name ();
 156
 157         bool writable() const { return _writable; }
 158         void set_dirty ();
 159         void set_clean ();
 160         bool dirty() const { return _state_of_the_state & Dirty; }
 161         void set_deletion_in_progress ();
 162         void clear_deletion_in_progress ();
 163         bool deletion_in_progress() const { return _state_of_the_state & Deletion; }
 164         PBD::Signal0<void> DirtyChanged;
 165
 166         const SessionDirectory& session_directory () const { return *(_session_dir.get()); }
 167
 168         static PBD::Signal0<void> AutoBindingOn;
 169         static PBD::Signal0<void> AutoBindingOff;
 170
 171         static PBD::Signal1<void,std::string> Dialog;
 172
 173         std::string sound_dir (bool with_path = true) const;
 174         std::string peak_dir () const;
 175         std::string dead_sound_dir () const;
 176         std::string automation_dir () const;
 177         std::string analysis_dir() const;
 178
 179         int ensure_subdirs ();
 180
 181         Glib::ustring peak_path (Glib::ustring) const;
 182
 183         static std::string change_source_path_by_name (std::string oldpath, std::string oldname, std::string newname, bool destructive);
 184
 185         std::string peak_path_from_audio_path (std::string) const;
 186         std::string new_audio_source_name (const std::string&, uint32_t nchans, uint32_t chan, bool destructive);
 187         std::string new_midi_source_name (const std::string&);
 188         std::string new_source_path_from_name (DataType type, const std::string&);
 189         RouteList new_route_from_template (uint32_t how_many, const std::string& template_path);
 190
 191         void process (nframes_t nframes);
 192
 193         BufferSet& get_silent_buffers (ChanCount count = ChanCount::ZERO);
 194         BufferSet& get_scratch_buffers (ChanCount count = ChanCount::ZERO);
 195         BufferSet& get_mix_buffers (ChanCount count = ChanCount::ZERO);
 196
 197         bool have_rec_enabled_track () const;
 198
 199         bool have_captured() const { return _have_captured; }
 200
 201         void refill_all_track_buffers ();
 202         Butler* butler() { return _butler; }
 203         void butler_transport_work ();
 204
 205         void refresh_disk_space ();
 206
 207         int load_diskstreams_2X (XMLNode const &, int);
 208
 209         int load_routes (const XMLNode&, int);
 210         boost::shared_ptr<RouteList> get_routes() const {
 211                 return routes.reader ();
 212         }
 213
 214         boost::shared_ptr<RouteList> get_routes_with_internal_returns() const;
 215
 216         boost::shared_ptr<RouteList> get_routes_with_regions_at (nframes64_t const) const;
 217
 218         uint32_t nroutes() const { return routes.reader()->size(); }
 219         uint32_t ntracks () const;
 220         uint32_t nbusses () const;
 221
 222         boost::shared_ptr<BundleList> bundles () {
 223                 return _bundles.reader ();
 224         }
 225
 226         struct RoutePublicOrderSorter {
 227                 bool operator() (boost::shared_ptr<Route>, boost::shared_ptr<Route> b);
 228         };
 229
 230         void sync_order_keys (std::string const &);
 231
 232         template<class T> void foreach_route (T *obj, void (T::*func)(Route&));
 233         template<class T> void foreach_route (T *obj, void (T::*func)(boost::shared_ptr<Route>));
 234         template<class T, class A> void foreach_route (T *obj, void (T::*func)(Route&, A), A arg);
 235
 236         bool io_name_is_legal (const std::string&);
 237         boost::shared_ptr<Route> route_by_name (std::string);
 238         boost::shared_ptr<Route> route_by_id (PBD::ID);
 239         boost::shared_ptr<Route> route_by_remote_id (uint32_t id);
 240
 241         bool route_name_unique (std::string) const;
 242         bool route_name_internal (std::string) const;
 243
 244         bool get_record_enabled() const {
 245                 return (record_status () >= Enabled);
 246         }
 247
 248         RecordState record_status() const {
 249                 return (RecordState) g_atomic_int_get (&_record_status);
 250         }
 251
 252         bool actively_recording () {
 253                 return record_status() == Recording;
 254         }
 255
 256         bool record_enabling_legal () const;
 257         void maybe_enable_record ();
 258         void disable_record (bool rt_context, bool force = false);
 259         void step_back_from_record ();
 260
 261         void maybe_write_autosave ();
 262
 263         /* Emitted when all i/o connections are complete */
 264
 265         PBD::Signal0<void> IOConnectionsComplete;
 266
 267         /* Record status signals */
 268
 269         PBD::Signal0<void> RecordStateChanged;
 270
 271         /* Transport mechanism signals */
 272
 273         PBD::Signal0<void> TransportStateChange; /* generic */
 274         PBD::Signal1<void,nframes64_t> PositionChanged; /* sent after any non-sequential motion */
 275         PBD::Signal1<void,nframes64_t> Xrun;
 276         PBD::Signal0<void> TransportLooped;
 277
 278         /** emitted when a locate has occurred */
 279         PBD::Signal0<void> Located;
 280
 281         PBD::Signal1<void,RouteList&> RouteAdded;
 282         /** Emitted when anything about any of our route groups changes */
 283         PBD::Signal0<void> RouteGroupChanged;
 284
 285         void queue_event (SessionEvent*);
 286
 287         void request_roll_at_and_return (nframes_t start, nframes_t return_to);
 288         void request_bounded_roll (nframes_t start, nframes_t end);
 289         void request_stop (bool abort = false, bool clear_state = false);
 290         void request_locate (nframes_t frame, bool with_roll = false);
 291
 292         void request_play_loop (bool yn, bool leave_rolling = false);
 293         bool get_play_loop () const { return play_loop; }
 294
 295         nframes_t  last_transport_start() const { return _last_roll_location; }
 296         void goto_end ();
 297         void goto_start ();
 298         void set_session_start (nframes_t);
 299         void set_session_end (nframes_t);
 300         void use_rf_shuttle_speed ();
 301         void allow_auto_play (bool yn);
 302         void request_transport_speed (double speed);
 303         void request_overwrite_buffer (Track *);
 304         void adjust_playback_buffering();
 305         void adjust_capture_buffering();
 306         void request_track_speed (Track *, double speed);
 307         void request_input_change_handling ();
 308
 309         bool locate_pending() const { return static_cast<bool>(post_transport_work()&PostTransportLocate); }
 310         bool transport_locked () const;
 311
 312         int wipe ();
 313
 314         std::pair<nframes_t, nframes_t> get_extent () const;
 315         nframes_t current_end_frame () const;
 316         nframes_t current_start_frame () const;
 317         /// "actual" sample rate of session, set by current audioengine rate, pullup/down etc.
 318         nframes_t frame_rate() const   { return _current_frame_rate; }
 319         /// "native" sample rate of session, regardless of current audioengine rate, pullup/down etc
 320         nframes_t nominal_frame_rate() const   { return _nominal_frame_rate; }
 321         nframes_t frames_per_hour() const { return _frames_per_hour; }
 322
 323         double frames_per_timecode_frame() const { return _frames_per_timecode_frame; }
 324         nframes_t timecode_frames_per_hour() const { return _timecode_frames_per_hour; }
 325
 326         MIDI::byte get_mtc_timecode_bits() const {
 327                 return mtc_timecode_bits;   /* encoding of SMTPE type for MTC */
 328         }
 329
 330         float timecode_frames_per_second() const;
 331         bool timecode_drop_frames() const;
 332
 333         /* Locations */
 334
 335         Locations *locations() { return &_locations; }
 336
 337         PBD::Signal1<void,Location*>    auto_loop_location_changed;
 338         PBD::Signal1<void,Location*>    auto_punch_location_changed;
 339         PBD::Signal0<void>              locations_modified;
 340
 341         void set_auto_punch_location (Location *);
 342         void set_auto_loop_location (Location *);
 343         int location_name(std::string& result, std::string base = std::string(""));
 344
 345         void reset_input_monitor_state ();
 346
 347         nframes_t get_block_size()        const { return current_block_size; }
 348         nframes_t worst_output_latency () const { return _worst_output_latency; }
 349         nframes_t worst_input_latency ()  const { return _worst_input_latency; }
 350         nframes_t worst_track_latency ()  const { return _worst_track_latency; }
 351
 352 #ifdef HAVE_JACK_SESSION
 353         void jack_session_event (jack_session_event_t* event);
 354 #endif
 355         int save_state (std::string snapshot_name, bool pending = false, bool switch_to_snapshot = false);
 356         int restore_state (std::string snapshot_name);
 357         int save_template (std::string template_name);
 358         int save_history (std::string snapshot_name = "");
 359         int restore_history (std::string snapshot_name);
 360         void remove_state (std::string snapshot_name);
 361         void rename_state (std::string old_name, std::string new_name);
 362         void remove_pending_capture_state ();
 363
 364         static int rename_template (std::string old_name, std::string new_name);
 365         static int delete_template (std::string name);
 366
 367         PBD::Signal1<void,std::string> StateSaved;
 368         PBD::Signal0<void> StateReady;
 369
 370         std::vector<std::string*>* possible_states() const;
 371         static std::vector<std::string*>* possible_states (std::string path);
 372
 373         XMLNode& get_state();
 374         int      set_state(const XMLNode& node, int version); // not idempotent
 375         XMLNode& get_template();
 376
 377         /// The instant xml file is written to the session directory
 378         void add_instant_xml (XMLNode&, bool write_to_config = true);
 379         XMLNode* instant_xml (const std::string& str);
 380
 381         enum StateOfTheState {
 382                 Clean = 0x0,
 383                 Dirty = 0x1,
 384                 CannotSave = 0x2,
 385                 Deletion = 0x4,
 386                 InitialConnecting = 0x8,
 387                 Loading = 0x10,
 388                 InCleanup = 0x20
 389         };
 390
 391         StateOfTheState state_of_the_state() const { return _state_of_the_state; }
 392
 393         void add_route_group (RouteGroup *);
 394         void remove_route_group (RouteGroup&);
 395
 396         RouteGroup *route_group_by_name (std::string);
 397
 398         PBD::Signal1<void,RouteGroup*> route_group_added;
 399         PBD::Signal0<void>             route_group_removed;
 400
 401         void foreach_route_group (boost::function<void(RouteGroup*)> f) {
 402                 for (std::list<RouteGroup *>::iterator i = _route_groups.begin(); i != _route_groups.end(); ++i) {
 403                         f (*i);
 404                 }
 405         }
 406
 407         /* fundamental operations. duh. */
 408
 409         std::list<boost::shared_ptr<AudioTrack> > new_audio_track (
 410                 int input_channels, int output_channels, TrackMode mode = Normal, RouteGroup* route_group = 0, uint32_t how_many = 1
 411                 );
 412
 413         RouteList new_audio_route (bool aux, int input_channels, int output_channels, RouteGroup* route_group, uint32_t how_many);
 414
 415         std::list<boost::shared_ptr<MidiTrack> > new_midi_track (
 416                 TrackMode mode = Normal, RouteGroup* route_group = 0, uint32_t how_many = 1
 417                 );
 418
 419         void   remove_route (boost::shared_ptr<Route>);
 420         void   resort_routes ();
 421         void   resort_routes_using (boost::shared_ptr<RouteList>);
 422
 423         void   set_remote_control_ids();
 424
 425         AudioEngine & engine() { return _engine; }
 426         AudioEngine const & engine () const { return _engine; }
 427
 428         /* Time */
 429
 430         nframes64_t transport_frame () const {return _transport_frame; }
 431         nframes64_t audible_frame () const;
 432         nframes64_t requested_return_frame() const { return _requested_return_frame; }
 433
 434         enum PullupFormat {
 435                 pullup_Plus4Plus1,
 436                 pullup_Plus4,
 437                 pullup_Plus4Minus1,
 438                 pullup_Plus1,
 439                 pullup_None,
 440                 pullup_Minus1,
 441                 pullup_Minus4Plus1,
 442                 pullup_Minus4,
 443                 pullup_Minus4Minus1
 444         };
 445
 446         void sync_time_vars();
 447
 448         void bbt_time (nframes_t when, BBT_Time&);
 449         void timecode_to_sample(Timecode::Time& timecode, nframes_t& sample, bool use_offset, bool use_subframes) const;
 450         void sample_to_timecode(nframes_t sample, Timecode::Time& timecode, bool use_offset, bool use_subframes) const;
 451         void timecode_time (Timecode::Time &);
 452         void timecode_time (nframes_t when, Timecode::Time&);
 453         void timecode_time_subframes (nframes_t when, Timecode::Time&);
 454
 455         void timecode_duration (nframes_t, Timecode::Time&) const;
 456         void timecode_duration_string (char *, nframes_t) const;
 457
 458         void           set_timecode_offset (nframes_t);
 459         nframes_t      timecode_offset () const { return _timecode_offset; }
 460         void           set_timecode_offset_negative (bool);
 461         bool           timecode_offset_negative () const { return _timecode_offset_negative; }
 462
 463         nframes_t convert_to_frames_at (nframes_t position, AnyTime const &);
 464
 465         static PBD::Signal0<void> StartTimeChanged;
 466         static PBD::Signal0<void> EndTimeChanged;
 467         static PBD::Signal0<void> TimecodeOffsetChanged;
 468
 469         std::vector<SyncSource> get_available_sync_options() const;
 470         void   request_sync_source (Slave*);
 471         bool   synced_to_jack() const { return config.get_external_sync() && config.get_sync_source() == JACK; }
 472
 473         double transport_speed() const { return _transport_speed; }
 474         bool   transport_stopped() const { return _transport_speed == 0.0f; }
 475         bool   transport_rolling() const { return _transport_speed != 0.0f; }
 476
 477         void set_silent (bool yn);
 478         bool silent () { return _silent; }
 479
 480         int jack_slave_sync (nframes_t);
 481
 482         TempoMap& tempo_map() { return *_tempo_map; }
 483
 484         /// signals the current transport position in frames, bbt and timecode time (in that order)
 485         PBD::Signal3<void,const nframes_t&, const BBT_Time&, const Timecode::Time&> tick;
 486
 487         /* region info  */
 488
 489         boost::shared_ptr<Region> find_whole_file_parent (boost::shared_ptr<Region const>) const;
 490
 491         std::string path_from_region_name (DataType type, std::string name, std::string identifier);
 492
 493         boost::shared_ptr<Region>      XMLRegionFactory (const XMLNode&, bool full);
 494         boost::shared_ptr<AudioRegion> XMLAudioRegionFactory (const XMLNode&, bool full);
 495         boost::shared_ptr<MidiRegion>  XMLMidiRegionFactory (const XMLNode&, bool full);
 496
 497         /* source management */
 498
 499         void import_audiofiles (ImportStatus&);
 500         bool sample_rate_convert (ImportStatus&, std::string infile, std::string& outfile);
 501         std::string build_tmp_convert_name (std::string file);
 502
 503         boost::shared_ptr<ExportHandler> get_export_handler ();
 504         boost::shared_ptr<ExportStatus> get_export_status ();
 505
 506         int  start_audio_export (nframes_t position, bool realtime);
 507
 508         PBD::Signal1<int,nframes_t> ProcessExport;
 509         static PBD::Signal2<void,std::string, std::string> Exported;
 510
 511         void add_source (boost::shared_ptr<Source>);
 512         void remove_source (boost::weak_ptr<Source>);
 513
 514         int  cleanup_sources (CleanupReport&);
 515         int  cleanup_trash_sources (CleanupReport&);
 516
 517         int destroy_sources (std::list<boost::shared_ptr<Source> >);
 518
 519         int remove_last_capture ();
 520
 521         /** handlers should return -1 for "stop cleanup",
 522             0 for "yes, delete this playlist",
 523             1 for "no, don't delete this playlist".
 524         */
 525         static PBD::Signal1<int,boost::shared_ptr<Playlist> >  AskAboutPlaylistDeletion;
 526
 527         /** handlers should return 0 for "ignore the rate mismatch",
 528             !0 for "do not use this session"
 529         */
 530         static PBD::Signal2<int,nframes_t, nframes_t> AskAboutSampleRateMismatch;
 531
 532         /** handlers should return !0 for use pending state, 0 for ignore it.
 533         */
 534         static PBD::Signal0<int> AskAboutPendingState;
 535
 536         boost::shared_ptr<AudioFileSource> create_audio_source_for_session (size_t, std::string const &, uint32_t, bool);
 537
 538         boost::shared_ptr<MidiSource> create_midi_source_for_session (Track*, std::string const &);
 539
 540         boost::shared_ptr<Source> source_by_id (const PBD::ID&);
 541         boost::shared_ptr<Source> source_by_path_and_channel (const Glib::ustring&, uint16_t);
 542
 543         void add_playlist (boost::shared_ptr<Playlist>, bool unused = false);
 544
 545         /* named selections */
 546
 547         boost::shared_ptr<NamedSelection> named_selection_by_name (std::string name);
 548         void add_named_selection (boost::shared_ptr<NamedSelection>);
 549         void remove_named_selection (boost::shared_ptr<NamedSelection>);
 550
 551         template<class T> void foreach_named_selection (T& obj, void (T::*func)(boost::shared_ptr<NamedSelection>));
 552         PBD::Signal0<void> NamedSelectionAdded;
 553         PBD::Signal0<void> NamedSelectionRemoved;
 554
 555         /* Curves and AutomationLists (TODO when they go away) */
 556         void add_automation_list(AutomationList*);
 557
 558         /* fade curves */
 559
 560         float get_default_fade_length () const { return default_fade_msecs; }
 561         float get_default_fade_steepness () const { return default_fade_steepness; }
 562         void set_default_fade (float steepness, float msecs);
 563
 564         /* auditioning */
 565
 566         boost::shared_ptr<Auditioner> the_auditioner() { return auditioner; }
 567         void audition_playlist ();
 568         void audition_region (boost::shared_ptr<Region>);
 569         void cancel_audition ();
 570         bool is_auditioning () const;
 571
 572         PBD::Signal1<void,bool> AuditionActive;
 573
 574         /* flattening stuff */
 575
 576         boost::shared_ptr<Region> write_one_track (AudioTrack&, nframes_t start, nframes_t end,
 577                         bool overwrite, std::vector<boost::shared_ptr<Source> >&, InterThreadInfo& wot,
 578                         bool enable_processing = true);
 579         int freeze_all (InterThreadInfo&);
 580
 581         /* session-wide solo/mute/rec-enable */
 582
 583         bool soloing() const { return _non_soloed_outs_muted; }
 584         bool listening() const { return _listen_cnt > 0; }
 585         bool solo_isolated() const { return _solo_isolated_cnt > 0; }
 586
 587         static const SessionEvent::RTeventCallback rt_cleanup;
 588
 589         void set_solo (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 590         void set_just_one_solo (boost::shared_ptr<Route>, bool, SessionEvent::RTeventCallback after = rt_cleanup);
 591         void set_mute (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 592         void set_listen (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 593         void set_record_enable (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 594         void set_solo_isolated (boost::shared_ptr<RouteList>, bool, SessionEvent::RTeventCallback after = rt_cleanup, bool group_override = false);
 595
 596         PBD::Signal1<void,bool> SoloActive;
 597         PBD::Signal0<void> SoloChanged;
 598         PBD::Signal0<void> IsolatedChanged;
 599
 600         /* control/master out */
 601
 602         boost::shared_ptr<Route> monitor_out() const { return _monitor_out; }
 603         boost::shared_ptr<Route> master_out() const { return _master_out; }
 604
 605         void globally_add_internal_sends (boost::shared_ptr<Route> dest, Placement p);
 606         void globally_set_send_gains_from_track (boost::shared_ptr<Route> dest);
 607         void globally_set_send_gains_to_zero (boost::shared_ptr<Route> dest);
 608         void globally_set_send_gains_to_unity (boost::shared_ptr<Route> dest);
 609         void add_internal_sends (boost::shared_ptr<Route> dest, Placement p, boost::shared_ptr<RouteList> senders);
 610
 611         static void set_disable_all_loaded_plugins (bool yn) {
 612                 _disable_all_loaded_plugins = yn;
 613         }
 614         static bool get_disable_all_loaded_plugins() {
 615                 return _disable_all_loaded_plugins;
 616         }
 617
 618         uint32_t next_send_id();
 619         uint32_t next_return_id();
 620         uint32_t next_insert_id();
 621         void mark_send_id (uint32_t);
 622         void mark_return_id (uint32_t);
 623         void mark_insert_id (uint32_t);
 624         void unmark_send_id (uint32_t);
 625         void unmark_return_id (uint32_t);
 626         void unmark_insert_id (uint32_t);
 627
 628         /* s/w "RAID" management */
 629
 630         nframes_t available_capture_duration();
 631
 632         /* I/O bundles */
 633
 634         void add_bundle (boost::shared_ptr<Bundle>);
 635         void remove_bundle (boost::shared_ptr<Bundle>);
 636         boost::shared_ptr<Bundle> bundle_by_name (std::string) const;
 637
 638         PBD::Signal1<void,boost::shared_ptr<Bundle> > BundleAdded;
 639         PBD::Signal1<void,boost::shared_ptr<Bundle> > BundleRemoved;
 640
 641         void midi_panic ();
 642
 643         /* Scrubbing */
 644
 645         void start_scrub (nframes_t where);
 646         void stop_scrub ();
 647         void set_scrub_speed (float);
 648         nframes_t scrub_buffer_size() const;
 649         PBD::Signal0<void> ScrubReady;
 650
 651         /* History (for editors, mixers, UIs etc.) */
 652
 653         /** Undo some transactions.
 654          * @param n Number of transactions to undo.
 655          */
 656         void undo (uint32_t n) {
 657                 _history.undo (n);
 658         }
 659
 660         void redo (uint32_t n) {
 661                 _history.redo (n);
 662         }
 663
 664         UndoHistory& history() { return _history; }
 665
 666         uint32_t undo_depth() const { return _history.undo_depth(); }
 667         uint32_t redo_depth() const { return _history.redo_depth(); }
 668         std::string next_undo() const { return _history.next_undo(); }
 669         std::string next_redo() const { return _history.next_redo(); }
 670
 671         void begin_reversible_command (const std::string& cmd_name);
 672         void commit_reversible_command (Command* cmd = 0);
 673
 674         UndoTransaction* start_reversible_command (const std::string& cmd_name);
 675         void finish_reversible_command (UndoTransaction&);
 676
 677         void add_command (Command *const cmd) {
 678                 assert(!_current_trans.empty ());
 679                 _current_trans.top()->add_command (cmd);
 680         }
 681
 682         std::map<PBD::ID,PBD::StatefulDestructible*> registry;
 683
 684         // these commands are implemented in libs/ardour/session_command.cc
 685         Command* memento_command_factory(XMLNode* n);
 686         Command* stateful_diff_command_factory (XMLNode *);
 687         void register_with_memento_command_factory(PBD::ID, PBD::StatefulDestructible*);
 688
 689         /* clicking */
 690
 691         boost::shared_ptr<IO> click_io() { return _click_io; }
 692
 693         /* disk, buffer loads */
 694
 695         uint32_t playback_load ();
 696         uint32_t capture_load ();
 697
 698         /* ranges */
 699
 700         void request_play_range (std::list<AudioRange>*, bool leave_rolling = false);
 701         bool get_play_range () const { return _play_range; }
 702
 703         /* buffers for gain and pan */
 704
 705         gain_t* gain_automation_buffer () const;
 706         pan_t** pan_automation_buffer () const;
 707
 708         void ensure_buffer_set (BufferSet& buffers, const ChanCount& howmany);
 709
 710         /* VST support */
 711
 712         static long vst_callback (AEffect* effect,
 713                         long opcode,
 714                         long index,
 715                         long value,
 716                         void* ptr,
 717                         float opt);
 718
 719         static PBD::Signal0<void> SendFeedback;
 720
 721         /* Controllables */
 722
 723         boost::shared_ptr<PBD::Controllable> controllable_by_id (const PBD::ID&);
 724         boost::shared_ptr<PBD::Controllable> controllable_by_descriptor (const PBD::ControllableDescriptor&);
 725
 726         void add_controllable (boost::shared_ptr<PBD::Controllable>);
 727         void remove_controllable (PBD::Controllable*);
 728
 729         SessionMetadata & metadata () { return *_metadata; }
 730
 731         SessionConfiguration config;
 732
 733         bool exporting () const {
 734                 return _exporting;
 735         }
 736
 737         /* this is a private enum, but setup_enum_writer() needs it,
 738            and i can't find a way to give that function
 739            friend access. sigh.
 740         */
 741
 742         enum PostTransportWork {
 743                 PostTransportStop               = 0x1,
 744                 PostTransportDisableRecord      = 0x2,
 745                 PostTransportPosition           = 0x8,
 746                 PostTransportDidRecord          = 0x20,
 747                 PostTransportDuration           = 0x40,
 748                 PostTransportLocate             = 0x80,
 749                 PostTransportRoll               = 0x200,
 750                 PostTransportAbort              = 0x800,
 751                 PostTransportOverWrite          = 0x1000,
 752                 PostTransportSpeed              = 0x2000,
 753                 PostTransportAudition           = 0x4000,
 754                 PostTransportScrub              = 0x8000,
 755                 PostTransportReverse            = 0x10000,
 756                 PostTransportInputChange        = 0x20000,
 757                 PostTransportCurveRealloc       = 0x40000,
 758                 PostTransportClearSubstate      = 0x80000,
 759                 PostTransportAdjustPlaybackBuffering  = 0x100000,
 760                 PostTransportAdjustCaptureBuffering   = 0x200000
 761         };
 762
 763         enum SlaveState {
 764                 Stopped,
 765                 Waiting,
 766                 Running
 767         };
 768
 769         SlaveState slave_state() const { return _slave_state; }
 770
 771         boost::shared_ptr<SessionPlaylists> playlists;
 772
 773         void send_mmc_locate (nframes64_t);
 774         int send_full_time_code (nframes64_t);
 775
 776   protected:
 777         friend class AudioEngine;
 778         void set_block_size (nframes_t nframes);
 779         void set_frame_rate (nframes_t nframes);
 780
 781   protected:
 782         friend class Route;
 783         void schedule_curve_reallocation ();
 784         void update_latency_compensation (bool, bool);
 785
 786   private:
 787         int  create (const std::string& mix_template, BusProfile*);
 788         void destroy ();
 789
 790         enum SubState {
 791                 PendingDeclickIn   = 0x1,
 792                 PendingDeclickOut  = 0x2,
 793                 StopPendingCapture = 0x4,
 794                 PendingLocate      = 0x20,
 795         };
 796
 797         /* stuff used in process() should be close together to
 798            maximise cache hits
 799         */
 800
 801         typedef void (Session::*process_function_type)(nframes_t);
 802
 803         AudioEngine&            _engine;
 804         mutable gint             processing_prohibited;
 805         process_function_type    process_function;
 806         process_function_type    last_process_function;
 807         bool                     waiting_for_sync_offset;
 808         nframes_t               _base_frame_rate;
 809         nframes_t               _current_frame_rate;  //this includes video pullup offset
 810         nframes_t               _nominal_frame_rate;  //ignores audioengine setting, "native" SR
 811         int                      transport_sub_state;
 812         mutable gint            _record_status;
 813         volatile nframes64_t    _transport_frame;
 814         Location*               _session_range_location; ///< session range, or 0 if there is nothing in the session yet
 815         Slave*                  _slave;
 816         bool                    _silent;
 817
 818     // varispeed playback
 819         volatile double             _transport_speed;
 820         double                      _last_transport_speed;
 821         double                      _target_transport_speed;
 822         CubicInterpolation          interpolation;
 823
 824         bool                     auto_play_legal;
 825         nframes64_t             _last_slave_transport_frame;
 826         nframes_t                maximum_output_latency;
 827         volatile nframes64_t    _requested_return_frame;
 828         nframes_t                current_block_size;
 829         nframes_t               _worst_output_latency;
 830         nframes_t               _worst_input_latency;
 831         nframes_t               _worst_track_latency;
 832         bool                    _have_captured;
 833         float                   _meter_hold;
 834         float                   _meter_falloff;
 835         bool                    _non_soloed_outs_muted;
 836         uint32_t                _listen_cnt;
 837         uint32_t                _solo_isolated_cnt;
 838         bool                    _writable;
 839         bool                    _was_seamless;
 840
 841         void set_worst_io_latencies ();
 842         void set_worst_io_latencies_x (IOChange, void *) {
 843                 set_worst_io_latencies ();
 844         }
 845
 846         void update_latency_compensation_proxy (void* ignored);
 847
 848         void ensure_buffers (ChanCount howmany = ChanCount::ZERO);
 849
 850         void process_scrub          (nframes_t);
 851         void process_without_events (nframes_t);
 852         void process_with_events    (nframes_t);
 853         void process_audition       (nframes_t);
 854         void process_export         (nframes_t);
 855         int  process_export_fw      (nframes_t);
 856
 857         void block_processing() { g_atomic_int_set (&processing_prohibited, 1); }
 858         void unblock_processing() { g_atomic_int_set (&processing_prohibited, 0); }
 859         bool processing_blocked() const { return g_atomic_int_get (&processing_prohibited); }
 860
 861         Glib::Mutex                process_thread_lock;
 862         std::list<ProcessThread*>  process_threads;
 863
 864         /* slave tracking */
 865
 866         static const int delta_accumulator_size = 25;
 867         int delta_accumulator_cnt;
 868         long delta_accumulator[delta_accumulator_size];
 869         long average_slave_delta;
 870         int  average_dir;
 871         bool have_first_delta_accumulator;
 872
 873         SlaveState _slave_state;
 874         nframes_t slave_wait_end;
 875
 876         void reset_slave_state ();
 877         bool follow_slave (nframes_t);
 878         void calculate_moving_average_of_slave_delta(int dir, nframes_t this_delta);
 879         void track_slave_state(float slave_speed, nframes_t slave_transport_frame, nframes_t this_delta);
 880         void follow_slave_silently(nframes_t nframes, float slave_speed);
 881
 882         void switch_to_sync_source (SyncSource); /* !RT context */
 883         void drop_sync_source ();  /* !RT context */
 884         void use_sync_source (Slave*); /* RT context */
 885
 886         bool post_export_sync;
 887         nframes_t post_export_position;
 888
 889         bool _exporting;
 890         bool _export_rolling;
 891
 892         boost::shared_ptr<ExportHandler> export_handler;
 893         boost::shared_ptr<ExportStatus>  export_status;
 894
 895         int  pre_export ();
 896         int  stop_audio_export ();
 897         void finalize_audio_export ();
 898
 899         PBD::ScopedConnection export_freewheel_connection;
 900
 901         void get_track_statistics ();
 902         int  process_routes (nframes_t, bool& need_butler);
 903         int  silent_process_routes (nframes_t, bool& need_butler);
 904
 905         bool get_rec_monitors_input () {
 906                 if (actively_recording()) {
 907                         return true;
 908                 } else {
 909                         if (config.get_auto_input()) {
 910                                 return false;
 911                         } else {
 912                                 return true;
 913                         }
 914                 }
 915         }
 916
 917         int get_transport_declick_required () {
 918                 if (transport_sub_state & PendingDeclickIn) {
 919                         transport_sub_state &= ~PendingDeclickIn;
 920                         return 1;
 921                 } else if (transport_sub_state & PendingDeclickOut) {
 922                         return -1;
 923                 } else {
 924                         return 0;
 925                 }
 926         }
 927
 928         bool maybe_stop (nframes_t limit);
 929         bool maybe_sync_start (nframes_t&);
 930
 931         void check_declick_out ();
 932
 933         std::string             _path;
 934         std::string             _name;
 935         bool                    _is_new;
 936         bool                     session_send_mtc;
 937         bool                     session_midi_feedback;
 938         bool                     play_loop;
 939         bool                     loop_changing;
 940         nframes_t                last_loopend;
 941
 942         boost::scoped_ptr<SessionDirectory> _session_dir;
 943
 944         void hookup_io ();
 945         void when_engine_running ();
 946         void graph_reordered ();
 947
 948         std::string _current_snapshot_name;
 949
 950         XMLTree*         state_tree;
 951         bool             state_was_pending;
 952         StateOfTheState _state_of_the_state;
 953
 954         void     auto_save();
 955         int      load_options (const XMLNode&);
 956         int      load_state (std::string snapshot_name);
 957
 958         nframes_t _last_roll_location;
 959         nframes_t _last_roll_or_reversal_location;
 960         nframes_t _last_record_location;
 961
 962         bool              pending_locate_roll;
 963         nframes_t         pending_locate_frame;
 964         bool              pending_locate_flush;
 965         bool              pending_abort;
 966         bool              pending_auto_loop;
 967
 968         Butler* _butler;
 969
 970 #if 0 // these should be here, see comments in their other location above
 971         enum PostTransportWork {
 972                 PostTransportStop               = 0x1,
 973                 PostTransportDisableRecord      = 0x2,
 974                 PostTransportPosition           = 0x8,
 975                 PostTransportDidRecord          = 0x20,
 976                 PostTransportDuration           = 0x40,
 977                 PostTransportLocate             = 0x80,
 978                 PostTransportRoll               = 0x200,
 979                 PostTransportAbort              = 0x800,
 980                 PostTransportOverWrite          = 0x1000,
 981                 PostTransportSpeed              = 0x2000,
 982                 PostTransportAudition           = 0x4000,
 983                 PostTransportScrub              = 0x8000,
 984                 PostTransportReverse            = 0x10000,
 985                 PostTransportInputChange        = 0x20000,
 986                 PostTransportCurveRealloc       = 0x40000,
 987                 PostTransportClearSubstate      = 0x80000
 988         };
 989 #endif
 990         static const PostTransportWork ProcessCannotProceedMask =
 991                 PostTransportWork (
 992                                 PostTransportInputChange|
 993                                 PostTransportSpeed|
 994                                 PostTransportReverse|
 995                                 PostTransportCurveRealloc|
 996                                 PostTransportScrub|
 997                                 PostTransportAudition|
 998                                 PostTransportLocate|
 999                                 PostTransportStop|
1000                                 PostTransportClearSubstate);
1001
1002         gint _post_transport_work; /* accessed only atomic ops */
1003         PostTransportWork post_transport_work() const        { return (PostTransportWork) g_atomic_int_get (&_post_transport_work); }
1004         void set_post_transport_work (PostTransportWork ptw) { g_atomic_int_set (&_post_transport_work, (gint) ptw); }
1005         void add_post_transport_work (PostTransportWork ptw);
1006
1007         void schedule_playback_buffering_adjustment ();
1008         void schedule_capture_buffering_adjustment ();
1009
1010         uint32_t    cumulative_rf_motion;
1011         uint32_t    rf_scale;
1012
1013         void set_rf_speed (float speed);
1014         void reset_rf_scale (nframes_t frames_moved);
1015
1016         Locations        _locations;
1017         void              locations_changed ();
1018         void              locations_added (Location*);
1019         void              handle_locations_changed (Locations::LocationList&);
1020
1021         PBD::ScopedConnectionList punch_connections;
1022         void             auto_punch_start_changed (Location *);
1023         void             auto_punch_end_changed (Location *);
1024         void             auto_punch_changed (Location *);
1025
1026         PBD::ScopedConnectionList loop_connections;
1027         void             auto_loop_changed (Location *);
1028
1029         void first_stage_init (std::string path, std::string snapshot_name);
1030         int  second_stage_init ();
1031         void update_session_range_location_marker ();
1032         void remove_empty_sounds ();
1033
1034         void setup_midi_control ();
1035         int  midi_read (MIDI::Port *);
1036
1037         void enable_record ();
1038
1039         void increment_transport_position (uint32_t val) {
1040                 if (max_frames - val < _transport_frame) {
1041                         _transport_frame = max_frames;
1042                 } else {
1043                         _transport_frame += val;
1044                 }
1045         }
1046
1047         void decrement_transport_position (uint32_t val) {
1048                 if (val < _transport_frame) {
1049                         _transport_frame -= val;
1050                 } else {
1051                         _transport_frame = 0;
1052                 }
1053         }
1054
1055         void post_transport_motion ();
1056         static void *session_loader_thread (void *arg);
1057
1058         void *do_work();
1059
1060         /* SessionEventManager interface */
1061
1062         void process_event (SessionEvent*);
1063         void set_next_event ();
1064         void cleanup_event (SessionEvent*,int);
1065
1066         /* MIDI Machine Control */
1067
1068         void spp_start (MIDI::Parser&, nframes_t timestamp);
1069         void spp_continue (MIDI::Parser&, nframes_t timestamp);
1070         void spp_stop (MIDI::Parser&, nframes_t timestamp);
1071
1072         void mmc_deferred_play (MIDI::MachineControl &);
1073         void mmc_stop (MIDI::MachineControl &);
1074         void mmc_step (MIDI::MachineControl &, int);
1075         void mmc_pause (MIDI::MachineControl &);
1076         void mmc_record_pause (MIDI::MachineControl &);
1077         void mmc_record_strobe (MIDI::MachineControl &);
1078         void mmc_record_exit (MIDI::MachineControl &);
1079         void mmc_track_record_status (MIDI::MachineControl &, uint32_t track, bool enabled);
1080         void mmc_fast_forward (MIDI::MachineControl &);
1081         void mmc_rewind (MIDI::MachineControl &);
1082         void mmc_locate (MIDI::MachineControl &, const MIDI::byte *);
1083         void mmc_shuttle (MIDI::MachineControl &mmc, float speed, bool forw);
1084         void mmc_record_enable (MIDI::MachineControl &mmc, size_t track, bool enabled);
1085
1086         struct timeval last_mmc_step;
1087         double step_speed;
1088
1089         typedef boost::function<bool()> MidiTimeoutCallback;
1090         typedef std::list<MidiTimeoutCallback> MidiTimeoutList;
1091
1092         MidiTimeoutList midi_timeouts;
1093         bool mmc_step_timeout ();
1094
1095         MIDI::byte mtc_msg[16];
1096         MIDI::byte mtc_timecode_bits;   /* encoding of SMTPE type for MTC */
1097         MIDI::byte midi_msg[16];
1098         nframes_t  outbound_mtc_timecode_frame;
1099         Timecode::Time transmitting_timecode_time;
1100         int next_quarter_frame_to_send;
1101
1102         double _frames_per_timecode_frame; /* has to be floating point because of drop frame */
1103         nframes_t _frames_per_hour;
1104         nframes_t _timecode_frames_per_hour;
1105         nframes_t _timecode_offset;
1106         bool _timecode_offset_negative;
1107
1108         /* cache the most-recently requested time conversions. This helps when we
1109          * have multiple clocks showing the same time (e.g. the transport frame) */
1110         bool           last_timecode_valid;
1111         nframes_t last_timecode_when;
1112         Timecode::Time    last_timecode;
1113
1114         bool _send_timecode_update; ///< Flag to send a full frame (Timecode) MTC message this cycle
1115
1116         int send_midi_time_code_for_cycle(nframes_t nframes);
1117
1118         nframes_t adjust_apparent_position (nframes_t frames);
1119
1120         void reset_record_status ();
1121
1122         int no_roll (nframes_t nframes);
1123         int fail_roll (nframes_t nframes);
1124
1125         bool non_realtime_work_pending() const { return static_cast<bool>(post_transport_work()); }
1126         bool process_can_proceed() const { return !(post_transport_work() & ProcessCannotProceedMask); }
1127
1128         MidiControlUI* midi_control_ui;
1129
1130         int           start_midi_thread ();
1131         void          terminate_midi_thread ();
1132
1133         void set_play_loop (bool yn);
1134         void unset_play_loop ();
1135         void overwrite_some_buffers (Track *);
1136         void flush_all_inserts ();
1137         int  micro_locate (nframes_t distance);
1138         void locate (nframes64_t, bool with_roll, bool with_flush, bool with_loop=false, bool force=false, bool with_mmc=true);
1139         void start_locate (nframes64_t, bool with_roll, bool with_flush, bool with_loop=false, bool force=false);
1140         void force_locate (nframes64_t frame, bool with_roll = false);
1141         void set_track_speed (Track *, double speed);
1142         void set_transport_speed (double speed, bool abort = false, bool clear_state = false);
1143         void stop_transport (bool abort = false, bool clear_state = false);
1144         void start_transport ();
1145         void realtime_stop (bool abort, bool clear_state);
1146         void non_realtime_start_scrub ();
1147         void non_realtime_set_speed ();
1148         void non_realtime_locate ();
1149         void non_realtime_stop (bool abort, int entry_request_count, bool& finished);
1150         void non_realtime_overwrite (int entry_request_count, bool& finished);
1151         void post_transport ();
1152         void engine_halted ();
1153         void xrun_recovery ();
1154
1155         TempoMap    *_tempo_map;
1156         void          tempo_map_changed (const PBD::PropertyChange&);
1157
1158         /* edit/mix groups */
1159
1160         int load_route_groups (const XMLNode&, int);
1161
1162         std::list<RouteGroup *> _route_groups;
1163
1164         /* routes stuff */
1165
1166         boost::shared_ptr<Graph> route_graph;
1167
1168         SerializedRCUManager<RouteList>  routes;
1169
1170         void add_routes (RouteList&, bool save);
1171         uint32_t destructive_index;
1172
1173         boost::shared_ptr<Route> XMLRouteFactory (const XMLNode&, int);
1174         boost::shared_ptr<Route> XMLRouteFactory_2X (const XMLNode&, int);
1175
1176         void route_processors_changed (RouteProcessorChange);
1177
1178         bool find_route_name (const char* base, uint32_t& id, char* name, size_t name_len);
1179         void count_existing_route_channels (ChanCount& in, ChanCount& out);
1180         void auto_connect_route (boost::shared_ptr<Route> route,
1181                 ChanCount& existing_inputs, ChanCount& existing_outputs);
1182
1183         /* mixer stuff */
1184
1185         bool solo_update_disabled;
1186
1187         void route_listen_changed (void *src, boost::weak_ptr<Route>);
1188         void route_mute_changed (void *src);
1189         void route_solo_changed (bool self_solo_change, void *src, boost::weak_ptr<Route>);
1190         void route_solo_isolated_changed (void *src, boost::weak_ptr<Route>);
1191         void update_route_solo_state (boost::shared_ptr<RouteList> r = boost::shared_ptr<RouteList>());
1192
1193         void listen_position_changed ();
1194         void solo_control_mode_changed ();
1195
1196         /* REGION MANAGEMENT */
1197
1198         mutable Glib::Mutex region_lock;
1199
1200         int load_regions (const XMLNode& node);
1201
1202         void route_group_changed ();
1203
1204         /* SOURCES */
1205
1206         mutable Glib::Mutex source_lock;
1207         typedef std::map<PBD::ID,boost::shared_ptr<Source> > SourceMap;
1208
1209         SourceMap sources;
1210
1211   public:
1212         SourceMap get_sources() { return sources; }
1213
1214   private:
1215         int load_sources (const XMLNode& node);
1216         XMLNode& get_sources_as_xml ();
1217
1218         boost::shared_ptr<Source> XMLSourceFactory (const XMLNode&);
1219
1220         /* PLAYLISTS */
1221
1222         void remove_playlist (boost::weak_ptr<Playlist>);
1223         void playlist_length_changed ();
1224         void track_playlist_changed (boost::weak_ptr<Track>);
1225
1226         /* NAMED SELECTIONS */
1227
1228         mutable Glib::Mutex named_selection_lock;
1229         typedef std::set<boost::shared_ptr<NamedSelection> > NamedSelectionList;
1230         NamedSelectionList named_selections;
1231
1232         int load_named_selections (const XMLNode&);
1233
1234         NamedSelection *named_selection_factory (std::string name);
1235         NamedSelection *XMLNamedSelectionFactory (const XMLNode&);
1236
1237         /* CURVES and AUTOMATION LISTS */
1238         std::map<PBD::ID, AutomationList*> automation_lists;
1239
1240         /* DEFAULT FADE CURVES */
1241
1242         float default_fade_steepness;
1243         float default_fade_msecs;
1244
1245         /* AUDITIONING */
1246
1247         boost::shared_ptr<Auditioner> auditioner;
1248         void set_audition (boost::shared_ptr<Region>);
1249         void non_realtime_set_audition ();
1250         boost::shared_ptr<Region> pending_audition_region;
1251
1252         /* EXPORT */
1253
1254         /* FLATTEN */
1255
1256         int flatten_one_track (AudioTrack&, nframes_t start, nframes_t cnt);
1257
1258         /* INSERT AND SEND MANAGEMENT */
1259
1260         boost::dynamic_bitset<uint32_t> send_bitset;
1261         boost::dynamic_bitset<uint32_t> return_bitset;
1262         boost::dynamic_bitset<uint32_t> insert_bitset;
1263
1264         /* S/W RAID */
1265
1266         struct space_and_path {
1267                 uint32_t blocks; /* 4kB blocks */
1268                 std::string path;
1269
1270                 space_and_path() {
1271                         blocks = 0;
1272                 }
1273         };
1274
1275         struct space_and_path_ascending_cmp {
1276                 bool operator() (space_and_path a, space_and_path b) {
1277                         return a.blocks > b.blocks;
1278                 }
1279         };
1280
1281         void setup_raid_path (std::string path);
1282
1283         std::vector<space_and_path> session_dirs;
1284         std::vector<space_and_path>::iterator last_rr_session_dir;
1285         uint32_t _total_free_4k_blocks;
1286         Glib::Mutex space_lock;
1287
1288         std::string get_best_session_directory_for_new_source ();
1289
1290         mutable gint _playback_load;
1291         mutable gint _capture_load;
1292
1293         /* I/O bundles */
1294
1295         SerializedRCUManager<BundleList> _bundles;
1296         XMLNode* _bundle_xml_node;
1297         int load_bundles (XMLNode const &);
1298
1299         void reverse_track_buffers ();
1300
1301         UndoHistory                  _history;
1302         std::stack<UndoTransaction*> _current_trans;
1303
1304         void jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int);
1305         int  jack_sync_callback (jack_transport_state_t, jack_position_t*);
1306         void reset_jack_connection (jack_client_t* jack);
1307         void process_rtop (SessionEvent*);
1308
1309         XMLNode& state(bool);
1310
1311         /* click track */
1312
1313         Clicks                 clicks;
1314         bool                  _clicking;
1315         boost::shared_ptr<IO> _click_io;
1316         Sample*                click_data;
1317         Sample*                click_emphasis_data;
1318         nframes_t              click_length;
1319         nframes_t              click_emphasis_length;
1320         mutable Glib::RWLock   click_lock;
1321
1322         static const Sample    default_click[];
1323         static const nframes_t default_click_length;
1324         static const Sample    default_click_emphasis[];
1325         static const nframes_t default_click_emphasis_length;
1326
1327         Click *get_click();
1328         void   setup_click_sounds (int which);
1329         void   clear_clicks ();
1330         void   click (nframes_t start, nframes_t nframes);
1331
1332         std::vector<Route*> master_outs;
1333
1334         /* range playback */
1335
1336         std::list<AudioRange> current_audio_range;
1337         bool _play_range;
1338         void set_play_range (std::list<AudioRange>&, bool leave_rolling);
1339         void unset_play_range ();
1340
1341         /* main outs */
1342         uint32_t main_outs;
1343
1344         boost::shared_ptr<Route> _master_out;
1345         boost::shared_ptr<Route> _monitor_out;
1346
1347         /* VST support */
1348
1349         long _vst_callback (VSTPlugin*,
1350                         long opcode,
1351                         long index,
1352                         long value,
1353                         void* ptr,
1354                         float opt);
1355
1356         /* number of hardware ports we're using,
1357            based on max (requested,available)
1358         */
1359
1360         uint32_t n_physical_outputs;
1361         uint32_t n_physical_inputs;
1362
1363         uint32_t n_physical_audio_outputs;
1364         uint32_t n_physical_audio_inputs;
1365
1366         uint32_t n_physical_midi_outputs;
1367         uint32_t n_physical_midi_inputs;
1368
1369         int find_all_sources (std::string path, std::set<std::string>& result);
1370         int find_all_sources_across_snapshots (std::set<std::string>& result, bool exclude_this_snapshot);
1371
1372         typedef std::set<boost::shared_ptr<PBD::Controllable> > Controllables;
1373         Glib::Mutex controllables_lock;
1374         Controllables controllables;
1375
1376         void reset_native_file_format();
1377         bool first_file_data_format_reset;
1378         bool first_file_header_format_reset;
1379
1380         void config_changed (std::string, bool);
1381
1382         XMLNode& get_control_protocol_state ();
1383
1384         void set_history_depth (uint32_t depth);
1385         void sync_order_keys ();
1386
1387         static bool _disable_all_loaded_plugins;
1388
1389         SessionMetadata * _metadata;
1390
1391         mutable bool have_looped; ///< Used in ::audible_frame(*)
1392
1393         void update_have_rec_enabled_track ();
1394         gint _have_rec_enabled_track;
1395
1396         static int ask_about_playlist_deletion (boost::shared_ptr<Playlist>);
1397
1398         /* realtime "apply to set of routes" operations */
1399         SessionEvent* get_rt_event (boost::shared_ptr<RouteList> rl, bool yn, SessionEvent::RTeventCallback after, bool group_override,
1400                 void (Session::*method) (boost::shared_ptr<RouteList>, bool, bool));
1401
1402         void rt_set_solo (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1403         void rt_set_just_one_solo (boost::shared_ptr<RouteList>, bool yn, bool /* ignored*/ );
1404         void rt_set_mute (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1405         void rt_set_listen (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1406         void rt_set_solo_isolated (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1407         void rt_set_record_enable (boost::shared_ptr<RouteList>, bool yn, bool group_override);
1408
1409         /** temporary list of Diskstreams used only during load of 2.X sessions */
1410         std::list<boost::shared_ptr<Diskstream> > _diskstreams_2X;
1411
1412         void add_session_range_location (nframes_t, nframes_t);
1413
1414         void setup_midi_machine_control ();
1415 };
1416
1417 } // namespace ARDOUR
1418
1419 #endif /* __ardour_session_h__ */