libs/ardour/session.cc

   1 /*
   2     Copyright (C) 1999-2004 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     $Id$
  19 */
  20
  21 #include <algorithm>
  22 #include <string>
  23 #include <vector>
  24 #include <sstream>
  25 #include <fstream>
  26 #include <cstdio> /* sprintf(3) ... grrr */
  27 #include <cmath>
  28 #include <cerrno>
  29 #include <unistd.h>
  30 #include <limits.h>
  31
  32 #include <sigc++/bind.h>
  33 #include <sigc++/retype.h>
  34
  35 #include <glibmm/thread.h>
  36 #include <glibmm/miscutils.h>
  37
  38 #include <pbd/error.h>
  39 #include <glibmm/thread.h>
  40 #include <pbd/pathscanner.h>
  41 #include <pbd/stl_delete.h>
  42 #include <pbd/basename.h>
  43 #include <pbd/stacktrace.h>
  44
  45 #include <ardour/audioengine.h>
  46 #include <ardour/configuration.h>
  47 #include <ardour/session.h>
  48 #include <ardour/audio_diskstream.h>
  49 #include <ardour/utils.h>
  50 #include <ardour/audioplaylist.h>
  51 #include <ardour/audioregion.h>
  52 #include <ardour/audiofilesource.h>
  53 #include <ardour/destructive_filesource.h>
  54 #include <ardour/auditioner.h>
  55 #include <ardour/recent_sessions.h>
  56 #include <ardour/redirect.h>
  57 #include <ardour/send.h>
  58 #include <ardour/insert.h>
  59 #include <ardour/connection.h>
  60 #include <ardour/slave.h>
  61 #include <ardour/tempo.h>
  62 #include <ardour/audio_track.h>
  63 #include <ardour/cycle_timer.h>
  64 #include <ardour/named_selection.h>
  65 #include <ardour/crossfade.h>
  66 #include <ardour/playlist.h>
  67 #include <ardour/click.h>
  68 #include <ardour/data_type.h>
  69 #include <ardour/source_factory.h>
  70 #include <ardour/region_factory.h>
  71
  72 #ifdef HAVE_LIBLO
  73 #include <ardour/osc.h>
  74 #endif
  75
  76 #include "i18n.h"
  77
  78 using namespace std;
  79 using namespace ARDOUR;
  80 using namespace PBD;
  81 using boost::shared_ptr;
  82
  83 const char* Session::_template_suffix = X_(".template");
  84 const char* Session::_statefile_suffix = X_(".ardour");
  85 const char* Session::_pending_suffix = X_(".pending");
  86 const char* Session::old_sound_dir_name = X_("sounds");
  87 const char* Session::sound_dir_name = X_("audiofiles");
  88 const char* Session::peak_dir_name = X_("peaks");
  89 const char* Session::dead_sound_dir_name = X_("dead_sounds");
  90 const char* Session::interchange_dir_name = X_("interchange");
  91
  92 Session::compute_peak_t                         Session::compute_peak                   = 0;
  93 Session::apply_gain_to_buffer_t         Session::apply_gain_to_buffer   = 0;
  94 Session::mix_buffers_with_gain_t        Session::mix_buffers_with_gain  = 0;
  95 Session::mix_buffers_no_gain_t          Session::mix_buffers_no_gain    = 0;
  96
  97 sigc::signal<int> Session::AskAboutPendingState;
  98 sigc::signal<void> Session::SendFeedback;
  99
 100 sigc::signal<void> Session::SMPTEOffsetChanged;
 101 sigc::signal<void> Session::StartTimeChanged;
 102 sigc::signal<void> Session::EndTimeChanged;
 103
 104 int
 105 Session::find_session (string str, string& path, string& snapshot, bool& isnew)
 106 {
 107         struct stat statbuf;
 108         char buf[PATH_MAX+1];
 109
 110         isnew = false;
 111
 112         if (!realpath (str.c_str(), buf) && (errno != ENOENT && errno != ENOTDIR)) {
 113                 error << string_compose (_("Could not resolve path: %1 (%2)"), buf, strerror(errno)) << endmsg;
 114                 return -1;
 115         }
 116
 117         str = buf;
 118
 119         /* check to see if it exists, and what it is */
 120
 121         if (stat (str.c_str(), &statbuf)) {
 122                 if (errno == ENOENT) {
 123                         isnew = true;
 124                 } else {
 125                         error << string_compose (_("cannot check session path %1 (%2)"), str, strerror (errno))
 126                               << endmsg;
 127                         return -1;
 128                 }
 129         }
 130
 131         if (!isnew) {
 132
 133                 /* it exists, so it must either be the name
 134                    of the directory, or the name of the statefile
 135                    within it.
 136                 */
 137
 138                 if (S_ISDIR (statbuf.st_mode)) {
 139
 140                         string::size_type slash = str.find_last_of ('/');
 141
 142                         if (slash == string::npos) {
 143
 144                                 /* a subdirectory of cwd, so statefile should be ... */
 145
 146                                 string tmp;
 147                                 tmp = str;
 148                                 tmp += '/';
 149                                 tmp += str;
 150                                 tmp += _statefile_suffix;
 151
 152                                 /* is it there ? */
 153
 154                                 if (stat (tmp.c_str(), &statbuf)) {
 155                                         error << string_compose (_("cannot check statefile %1 (%2)"), tmp, strerror (errno))
 156                                               << endmsg;
 157                                         return -1;
 158                                 }
 159
 160                                 path = str;
 161                                 snapshot = str;
 162
 163                         } else {
 164
 165                                 /* some directory someplace in the filesystem.
 166                                    the snapshot name is the directory name
 167                                    itself.
 168                                 */
 169
 170                                 path = str;
 171                                 snapshot = str.substr (slash+1);
 172
 173                         }
 174
 175                 } else if (S_ISREG (statbuf.st_mode)) {
 176
 177                         string::size_type slash = str.find_last_of ('/');
 178                         string::size_type suffix;
 179
 180                         /* remove the suffix */
 181
 182                         if (slash != string::npos) {
 183                                 snapshot = str.substr (slash+1);
 184                         } else {
 185                                 snapshot = str;
 186                         }
 187
 188                         suffix = snapshot.find (_statefile_suffix);
 189
 190                         if (suffix == string::npos) {
 191                                 error << string_compose (_("%1 is not an Ardour snapshot file"), str) << endmsg;
 192                                 return -1;
 193                         }
 194
 195                         /* remove suffix */
 196
 197                         snapshot = snapshot.substr (0, suffix);
 198
 199                         if (slash == string::npos) {
 200
 201                                 /* we must be in the directory where the
 202                                    statefile lives. get it using cwd().
 203                                 */
 204
 205                                 char cwd[PATH_MAX+1];
 206
 207                                 if (getcwd (cwd, sizeof (cwd)) == 0) {
 208                                         error << string_compose (_("cannot determine current working directory (%1)"), strerror (errno))
 209                                               << endmsg;
 210                                         return -1;
 211                                 }
 212
 213                                 path = cwd;
 214
 215                         } else {
 216
 217                                 /* full path to the statefile */
 218
 219                                 path = str.substr (0, slash);
 220                         }
 221
 222                 } else {
 223
 224                         /* what type of file is it? */
 225                         error << string_compose (_("unknown file type for session %1"), str) << endmsg;
 226                         return -1;
 227                 }
 228
 229         } else {
 230
 231                 /* its the name of a new directory. get the name
 232                    as "dirname" does.
 233                 */
 234
 235                 string::size_type slash = str.find_last_of ('/');
 236
 237                 if (slash == string::npos) {
 238
 239                         /* no slash, just use the name, but clean it up */
 240
 241                         path = legalize_for_path (str);
 242                         snapshot = path;
 243
 244                 } else {
 245
 246                         path = str;
 247                         snapshot = str.substr (slash+1);
 248                 }
 249         }
 250
 251         return 0;
 252 }
 253
 254 Session::Session (AudioEngine &eng,
 255                   string fullpath,
 256                   string snapshot_name,
 257                   string* mix_template)
 258
 259         : _engine (eng),
 260           _mmc_port (default_mmc_port),
 261           _mtc_port (default_mtc_port),
 262           _midi_port (default_midi_port),
 263           pending_events (2048),
 264           midi_requests (128), // the size of this should match the midi request pool size
 265           diskstreams (new DiskstreamList),
 266           routes (new RouteList),
 267           auditioner ((Auditioner*) 0),
 268           _click_io ((IO*) 0),
 269           main_outs (0)
 270 {
 271         bool new_session;
 272
 273         cerr << "Loading session " << fullpath << " using snapshot " << snapshot_name << " (1)" << endl;
 274
 275         n_physical_outputs = _engine.n_physical_outputs();
 276         n_physical_inputs =  _engine.n_physical_inputs();
 277
 278         first_stage_init (fullpath, snapshot_name);
 279
 280         new_session = !g_file_test (_path.c_str(), GFileTest (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR));
 281         if (new_session) {
 282                 if (create (new_session, mix_template, compute_initial_length())) {
 283                         cerr << "create failed\n";
 284                         destroy ();
 285                         throw failed_constructor ();
 286                 }
 287         }
 288
 289         if (second_stage_init (new_session)) {
 290                 destroy ();
 291                 throw failed_constructor ();
 292         }
 293
 294         store_recent_sessions(_name, _path);
 295
 296         bool was_dirty = dirty();
 297
 298         _state_of_the_state = StateOfTheState (_state_of_the_state & ~Dirty);
 299
 300         Config->ParameterChanged.connect (mem_fun (*this, &Session::config_changed));
 301
 302         if (was_dirty) {
 303                 DirtyChanged (); /* EMIT SIGNAL */
 304         }
 305 }
 306
 307 Session::Session (AudioEngine &eng,
 308                   string fullpath,
 309                   string snapshot_name,
 310                   AutoConnectOption input_ac,
 311                   AutoConnectOption output_ac,
 312                   uint32_t control_out_channels,
 313                   uint32_t master_out_channels,
 314                   uint32_t requested_physical_in,
 315                   uint32_t requested_physical_out,
 316                   nframes_t initial_length)
 317
 318         : _engine (eng),
 319           _mmc_port (default_mmc_port),
 320           _mtc_port (default_mtc_port),
 321           _midi_port (default_midi_port),
 322           pending_events (2048),
 323           midi_requests (16),
 324           diskstreams (new DiskstreamList),
 325           routes (new RouteList),
 326           main_outs (0)
 327
 328 {
 329         bool new_session;
 330
 331         cerr << "Loading session " << fullpath << " using snapshot " << snapshot_name << " (2)" << endl;
 332
 333         n_physical_outputs = _engine.n_physical_outputs();
 334         n_physical_inputs = _engine.n_physical_inputs();
 335
 336         if (n_physical_inputs) {
 337                 n_physical_inputs = max (requested_physical_in, n_physical_inputs);
 338         }
 339
 340         if (n_physical_outputs) {
 341                 n_physical_outputs = max (requested_physical_out, n_physical_outputs);
 342         }
 343
 344         first_stage_init (fullpath, snapshot_name);
 345
 346         new_session = !g_file_test (_path.c_str(), GFileTest (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR));
 347
 348         if (new_session) {
 349                 if (create (new_session, 0, initial_length)) {
 350                         destroy ();
 351                         throw failed_constructor ();
 352                 }
 353         }
 354
 355         {
 356                 /* set up Master Out and Control Out if necessary */
 357
 358                 RouteList rl;
 359                 int control_id = 1;
 360
 361                 if (control_out_channels) {
 362                         shared_ptr<Route> r (new Route (*this, _("monitor"), -1, control_out_channels, -1, control_out_channels, Route::ControlOut));
 363                         r->set_remote_control_id (control_id++);
 364
 365                         rl.push_back (r);
 366                 }
 367
 368                 if (master_out_channels) {
 369                         shared_ptr<Route> r (new Route (*this, _("master"), -1, master_out_channels, -1, master_out_channels, Route::MasterOut));
 370                         r->set_remote_control_id (control_id);
 371
 372                         rl.push_back (r);
 373                 } else {
 374                         /* prohibit auto-connect to master, because there isn't one */
 375                         output_ac = AutoConnectOption (output_ac & ~AutoConnectMaster);
 376                 }
 377
 378                 if (!rl.empty()) {
 379                         add_routes (rl);
 380                 }
 381
 382         }
 383
 384         Config->set_input_auto_connect (input_ac);
 385         Config->set_output_auto_connect (output_ac);
 386
 387         if (second_stage_init (new_session)) {
 388                 destroy ();
 389                 throw failed_constructor ();
 390         }
 391
 392         store_recent_sessions(_name, _path);
 393
 394         bool was_dirty = dirty ();
 395
 396         _state_of_the_state = StateOfTheState (_state_of_the_state & ~Dirty);
 397
 398         Config->ParameterChanged.connect (mem_fun (*this, &Session::config_changed));
 399
 400         if (was_dirty) {
 401                 DirtyChanged (); /* EMIT SIGNAL */
 402         }
 403 }
 404
 405 Session::~Session ()
 406 {
 407         destroy ();
 408 }
 409
 410 void
 411 Session::destroy ()
 412 {
 413         /* if we got to here, leaving pending capture state around
 414            is a mistake.
 415         */
 416
 417         remove_pending_capture_state ();
 418
 419         _state_of_the_state = StateOfTheState (CannotSave|Deletion);
 420         _engine.remove_session ();
 421
 422         GoingAway (); /* EMIT SIGNAL */
 423
 424         /* do this */
 425
 426         notify_callbacks ();
 427
 428         /* clear history so that no references to objects are held any more */
 429
 430         _history.clear ();
 431
 432         /* clear state tree so that no references to objects are held any more */
 433
 434         if (state_tree) {
 435                 delete state_tree;
 436         }
 437
 438         terminate_butler_thread ();
 439         terminate_midi_thread ();
 440
 441         if (click_data && click_data != default_click) {
 442                 delete [] click_data;
 443         }
 444
 445         if (click_emphasis_data && click_emphasis_data != default_click_emphasis) {
 446                 delete [] click_emphasis_data;
 447         }
 448
 449         clear_clicks ();
 450
 451         for (vector<Sample*>::iterator i = _passthru_buffers.begin(); i != _passthru_buffers.end(); ++i) {
 452                 free(*i);
 453         }
 454
 455         for (vector<Sample*>::iterator i = _silent_buffers.begin(); i != _silent_buffers.end(); ++i) {
 456                 free(*i);
 457         }
 458
 459         for (vector<Sample*>::iterator i = _send_buffers.begin(); i != _send_buffers.end(); ++i) {
 460                 free(*i);
 461         }
 462
 463         AudioDiskstream::free_working_buffers();
 464
 465         /* this should cause deletion of the auditioner */
 466
 467         // auditioner.reset ();
 468
 469 #undef TRACK_DESTRUCTION
 470 #ifdef TRACK_DESTRUCTION
 471         cerr << "delete named selections\n";
 472 #endif /* TRACK_DESTRUCTION */
 473         for (NamedSelectionList::iterator i = named_selections.begin(); i != named_selections.end(); ) {
 474                 NamedSelectionList::iterator tmp;
 475
 476                 tmp = i;
 477                 ++tmp;
 478
 479                 delete *i;
 480                 i = tmp;
 481         }
 482
 483 #ifdef TRACK_DESTRUCTION
 484         cerr << "delete playlists\n";
 485 #endif /* TRACK_DESTRUCTION */
 486         for (PlaylistList::iterator i = playlists.begin(); i != playlists.end(); ) {
 487                 PlaylistList::iterator tmp;
 488
 489                 tmp = i;
 490                 ++tmp;
 491
 492                 (*i)->drop_references ();
 493
 494                 i = tmp;
 495         }
 496
 497         for (PlaylistList::iterator i = unused_playlists.begin(); i != unused_playlists.end(); ) {
 498                 PlaylistList::iterator tmp;
 499
 500                 tmp = i;
 501                 ++tmp;
 502
 503                 (*i)->drop_references ();
 504
 505                 i = tmp;
 506         }
 507
 508         playlists.clear ();
 509         unused_playlists.clear ();
 510
 511 #ifdef TRACK_DESTRUCTION
 512         cerr << "delete audio regions\n";
 513 #endif /* TRACK_DESTRUCTION */
 514
 515         for (AudioRegionList::iterator i = audio_regions.begin(); i != audio_regions.end(); ) {
 516                 AudioRegionList::iterator tmp;
 517
 518                 tmp = i;
 519                 ++tmp;
 520
 521                 i->second->drop_references ();
 522
 523                 i = tmp;
 524         }
 525
 526         audio_regions.clear ();
 527
 528 #ifdef TRACK_DESTRUCTION
 529         cerr << "delete routes\n";
 530 #endif /* TRACK_DESTRUCTION */
 531         {
 532                 RCUWriter<RouteList> writer (routes);
 533                 boost::shared_ptr<RouteList> r = writer.get_copy ();
 534                 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
 535                         (*i)->drop_references ();
 536                 }
 537                 r->clear ();
 538                 /* writer goes out of scope and updates master */
 539         }
 540
 541         routes.flush ();
 542
 543 #ifdef TRACK_DESTRUCTION
 544         cerr << "delete diskstreams\n";
 545 #endif /* TRACK_DESTRUCTION */
 546        {
 547                RCUWriter<DiskstreamList> dwriter (diskstreams);
 548                boost::shared_ptr<DiskstreamList> dsl = dwriter.get_copy();
 549                for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
 550                        (*i)->drop_references ();
 551                }
 552                dsl->clear ();
 553        }
 554        diskstreams.flush ();
 555
 556 #ifdef TRACK_DESTRUCTION
 557         cerr << "delete audio sources\n";
 558 #endif /* TRACK_DESTRUCTION */
 559         for (AudioSourceList::iterator i = audio_sources.begin(); i != audio_sources.end(); ) {
 560                 AudioSourceList::iterator tmp;
 561
 562                 tmp = i;
 563                 ++tmp;
 564
 565                 i->second->drop_references ();
 566
 567                 i = tmp;
 568         }
 569
 570         audio_sources.clear ();
 571
 572 #ifdef TRACK_DESTRUCTION
 573         cerr << "delete mix groups\n";
 574 #endif /* TRACK_DESTRUCTION */
 575         for (list<RouteGroup *>::iterator i = mix_groups.begin(); i != mix_groups.end(); ) {
 576                 list<RouteGroup*>::iterator tmp;
 577
 578                 tmp = i;
 579                 ++tmp;
 580
 581                 delete *i;
 582
 583                 i = tmp;
 584         }
 585
 586 #ifdef TRACK_DESTRUCTION
 587         cerr << "delete edit groups\n";
 588 #endif /* TRACK_DESTRUCTION */
 589         for (list<RouteGroup *>::iterator i = edit_groups.begin(); i != edit_groups.end(); ) {
 590                 list<RouteGroup*>::iterator tmp;
 591
 592                 tmp = i;
 593                 ++tmp;
 594
 595                 delete *i;
 596
 597                 i = tmp;
 598         }
 599
 600 #ifdef TRACK_DESTRUCTION
 601         cerr << "delete connections\n";
 602 #endif /* TRACK_DESTRUCTION */
 603         for (ConnectionList::iterator i = _connections.begin(); i != _connections.end(); ) {
 604                 ConnectionList::iterator tmp;
 605
 606                 tmp = i;
 607                 ++tmp;
 608
 609                 delete *i;
 610
 611                 i = tmp;
 612         }
 613
 614         if (butler_mixdown_buffer) {
 615                 delete [] butler_mixdown_buffer;
 616         }
 617
 618         if (butler_gain_buffer) {
 619                 delete [] butler_gain_buffer;
 620         }
 621
 622         Crossfade::set_buffer_size (0);
 623
 624         if (mmc) {
 625                 delete mmc;
 626         }
 627 }
 628
 629 void
 630 Session::set_worst_io_latencies ()
 631 {
 632         _worst_output_latency = 0;
 633         _worst_input_latency = 0;
 634
 635         if (!_engine.connected()) {
 636                 return;
 637         }
 638
 639         boost::shared_ptr<RouteList> r = routes.reader ();
 640
 641         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
 642                 _worst_output_latency = max (_worst_output_latency, (*i)->output_latency());
 643                 _worst_input_latency = max (_worst_input_latency, (*i)->input_latency());
 644         }
 645 }
 646
 647 void
 648 Session::when_engine_running ()
 649 {
 650         string first_physical_output;
 651
 652         /* we don't want to run execute this again */
 653
 654         set_block_size (_engine.frames_per_cycle());
 655         set_frame_rate (_engine.frame_rate());
 656
 657         Config->map_parameters (mem_fun (*this, &Session::config_changed));
 658
 659         /* every time we reconnect, recompute worst case output latencies */
 660
 661         _engine.Running.connect (mem_fun (*this, &Session::set_worst_io_latencies));
 662
 663         if (synced_to_jack()) {
 664                 _engine.transport_stop ();
 665         }
 666
 667         if (Config->get_jack_time_master()) {
 668                 _engine.transport_locate (_transport_frame);
 669         }
 670
 671         _clicking = false;
 672
 673         try {
 674                 XMLNode* child = 0;
 675
 676                 _click_io.reset (new ClickIO (*this, "click", 0, 0, -1, -1));
 677
 678                 if (state_tree && (child = find_named_node (*state_tree->root(), "Click")) != 0) {
 679
 680                         /* existing state for Click */
 681
 682                         if (_click_io->set_state (*child->children().front()) == 0) {
 683
 684                                 _clicking = Config->get_clicking ();
 685
 686                         } else {
 687
 688                                 error << _("could not setup Click I/O") << endmsg;
 689                                 _clicking = false;
 690                         }
 691
 692                 } else {
 693
 694                         /* default state for Click */
 695
 696                         first_physical_output = _engine.get_nth_physical_output (0);
 697
 698                         if (first_physical_output.length()) {
 699                                 if (_click_io->add_output_port (first_physical_output, this)) {
 700                                         // relax, even though its an error
 701                                 } else {
 702                                         _clicking = Config->get_clicking ();
 703                                 }
 704                         }
 705                 }
 706         }
 707
 708         catch (failed_constructor& err) {
 709                 error << _("cannot setup Click I/O") << endmsg;
 710         }
 711
 712         set_worst_io_latencies ();
 713
 714         if (_clicking) {
 715                 // XXX HOW TO ALERT UI TO THIS ? DO WE NEED TO?
 716         }
 717
 718         /* Create a set of Connection objects that map
 719            to the physical outputs currently available
 720         */
 721
 722         /* ONE: MONO */
 723
 724         for (uint32_t np = 0; np < n_physical_outputs; ++np) {
 725                 char buf[32];
 726                 snprintf (buf, sizeof (buf), _("out %" PRIu32), np+1);
 727
 728                 Connection* c = new OutputConnection (buf, true);
 729
 730                 c->add_port ();
 731                 c->add_connection (0, _engine.get_nth_physical_output (np));
 732
 733                 add_connection (c);
 734         }
 735
 736         for (uint32_t np = 0; np < n_physical_inputs; ++np) {
 737                 char buf[32];
 738                 snprintf (buf, sizeof (buf), _("in %" PRIu32), np+1);
 739
 740                 Connection* c = new InputConnection (buf, true);
 741
 742                 c->add_port ();
 743                 c->add_connection (0, _engine.get_nth_physical_input (np));
 744
 745                 add_connection (c);
 746         }
 747
 748         /* TWO: STEREO */
 749
 750         for (uint32_t np = 0; np < n_physical_outputs; np +=2) {
 751                 char buf[32];
 752                 snprintf (buf, sizeof (buf), _("out %" PRIu32 "+%" PRIu32), np+1, np+2);
 753
 754                 Connection* c = new OutputConnection (buf, true);
 755
 756                 c->add_port ();
 757                 c->add_port ();
 758                 c->add_connection (0, _engine.get_nth_physical_output (np));
 759                 c->add_connection (1, _engine.get_nth_physical_output (np+1));
 760
 761                 add_connection (c);
 762         }
 763
 764         for (uint32_t np = 0; np < n_physical_inputs; np +=2) {
 765                 char buf[32];
 766                 snprintf (buf, sizeof (buf), _("in %" PRIu32 "+%" PRIu32), np+1, np+2);
 767
 768                 Connection* c = new InputConnection (buf, true);
 769
 770                 c->add_port ();
 771                 c->add_port ();
 772                 c->add_connection (0, _engine.get_nth_physical_input (np));
 773                 c->add_connection (1, _engine.get_nth_physical_input (np+1));
 774
 775                 add_connection (c);
 776         }
 777
 778         /* THREE MASTER */
 779
 780         if (_master_out) {
 781
 782                 /* create master/control ports */
 783
 784                 if (_master_out) {
 785                         uint32_t n;
 786
 787                         /* force the master to ignore any later call to this */
 788
 789                         if (_master_out->pending_state_node) {
 790                                 _master_out->ports_became_legal();
 791                         }
 792
 793                         /* no panner resets till we are through */
 794
 795                         _master_out->defer_pan_reset ();
 796
 797                         while ((int) _master_out->n_inputs() < _master_out->input_maximum()) {
 798                                 if (_master_out->add_input_port ("", this)) {
 799                                         error << _("cannot setup master inputs")
 800                                               << endmsg;
 801                                         break;
 802                                 }
 803                         }
 804                         n = 0;
 805                         while ((int) _master_out->n_outputs() < _master_out->output_maximum()) {
 806                                 if (_master_out->add_output_port (_engine.get_nth_physical_output (n), this)) {
 807                                         error << _("cannot setup master outputs")
 808                                               << endmsg;
 809                                         break;
 810                                 }
 811                                 n++;
 812                         }
 813
 814                         _master_out->allow_pan_reset ();
 815
 816                 }
 817
 818                 Connection* c = new OutputConnection (_("Master Out"), true);
 819
 820                 for (uint32_t n = 0; n < _master_out->n_inputs (); ++n) {
 821                         c->add_port ();
 822                         c->add_connection ((int) n, _master_out->input(n)->name());
 823                 }
 824                 add_connection (c);
 825         }
 826
 827         hookup_io ();
 828
 829         /* catch up on send+insert cnts */
 830
 831         insert_cnt = 0;
 832
 833         for (list<PortInsert*>::iterator i = _port_inserts.begin(); i != _port_inserts.end(); ++i) {
 834                 uint32_t id;
 835
 836                 if (sscanf ((*i)->name().c_str(), "%*s %u", &id) == 1) {
 837                         if (id > insert_cnt) {
 838                                 insert_cnt = id;
 839                         }
 840                 }
 841         }
 842
 843         send_cnt = 0;
 844
 845         for (list<Send*>::iterator i = _sends.begin(); i != _sends.end(); ++i) {
 846                 uint32_t id;
 847
 848                 if (sscanf ((*i)->name().c_str(), "%*s %u", &id) == 1) {
 849                         if (id > send_cnt) {
 850                                 send_cnt = id;
 851                         }
 852                 }
 853         }
 854
 855
 856         _state_of_the_state = StateOfTheState (_state_of_the_state & ~(CannotSave|Dirty));
 857
 858         /* hook us up to the engine */
 859
 860         _engine.set_session (this);
 861
 862 #ifdef HAVE_LIBLO
 863         /* and to OSC */
 864
 865         osc->set_session (*this);
 866 #endif
 867
 868         _state_of_the_state = Clean;
 869
 870         DirtyChanged (); /* EMIT SIGNAL */
 871 }
 872
 873 void
 874 Session::hookup_io ()
 875 {
 876         /* stop graph reordering notifications from
 877            causing resorts, etc.
 878         */
 879
 880         _state_of_the_state = StateOfTheState (_state_of_the_state | InitialConnecting);
 881
 882         if (auditioner == 0) {
 883
 884                 /* we delay creating the auditioner till now because
 885                    it makes its own connections to ports.
 886                    the engine has to be running for this to work.
 887                 */
 888
 889                 try {
 890                         auditioner.reset (new Auditioner (*this));
 891                 }
 892
 893                 catch (failed_constructor& err) {
 894                         warning << _("cannot create Auditioner: no auditioning of regions possible") << endmsg;
 895                 }
 896         }
 897
 898         /* Tell all IO objects to create their ports */
 899
 900         IO::enable_ports ();
 901
 902         if (_control_out) {
 903                 uint32_t n;
 904
 905                 while ((int) _control_out->n_inputs() < _control_out->input_maximum()) {
 906                         if (_control_out->add_input_port ("", this)) {
 907                                 error << _("cannot setup control inputs")
 908                                       << endmsg;
 909                                 break;
 910                         }
 911                 }
 912                 n = 0;
 913                 while ((int) _control_out->n_outputs() < _control_out->output_maximum()) {
 914                         if (_control_out->add_output_port (_engine.get_nth_physical_output (n), this)) {
 915                                 error << _("cannot set up master outputs")
 916                                       << endmsg;
 917                                 break;
 918                         }
 919                         n++;
 920                 }
 921         }
 922
 923         /* Tell all IO objects to connect themselves together */
 924
 925         IO::enable_connecting ();
 926
 927         /* Now reset all panners */
 928
 929         IO::reset_panners ();
 930
 931         /* Anyone who cares about input state, wake up and do something */
 932
 933         IOConnectionsComplete (); /* EMIT SIGNAL */
 934
 935         _state_of_the_state = StateOfTheState (_state_of_the_state & ~InitialConnecting);
 936
 937         /* now handle the whole enchilada as if it was one
 938            graph reorder event.
 939         */
 940
 941         graph_reordered ();
 942
 943         /* update mixer solo state */
 944
 945         catch_up_on_solo();
 946 }
 947
 948 void
 949 Session::playlist_length_changed ()
 950 {
 951         /* we can't just increase end_location->end() if pl->get_maximum_extent()
 952            if larger. if the playlist used to be the longest playlist,
 953            and its now shorter, we have to decrease end_location->end(). hence,
 954            we have to iterate over all diskstreams and check the
 955            playlists currently in use.
 956         */
 957         find_current_end ();
 958 }
 959
 960 void
 961 Session::diskstream_playlist_changed (boost::shared_ptr<Diskstream> dstream)
 962 {
 963         boost::shared_ptr<Playlist> playlist;
 964
 965         if ((playlist = dstream->playlist()) != 0) {
 966                 playlist->LengthChanged.connect (mem_fun (this, &Session::playlist_length_changed));
 967         }
 968
 969         /* see comment in playlist_length_changed () */
 970         find_current_end ();
 971 }
 972
 973 bool
 974 Session::record_enabling_legal () const
 975 {
 976         /* this used to be in here, but survey says.... we don't need to restrict it */
 977         // if (record_status() == Recording) {
 978         //      return false;
 979         // }
 980
 981         if (Config->get_all_safe()) {
 982                 return false;
 983         }
 984         return true;
 985 }
 986
 987 void
 988 Session::reset_input_monitor_state ()
 989 {
 990         if (transport_rolling()) {
 991
 992                 boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
 993
 994                 for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
 995                         if ((*i)->record_enabled ()) {
 996                                 //cerr << "switching to input = " << !auto_input << __FILE__ << __LINE__ << endl << endl;
 997                                 (*i)->monitor_input (Config->get_monitoring_model() == HardwareMonitoring && !Config->get_auto_input());
 998                         }
 999                 }
1000         } else {
1001                 boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
1002
1003                 for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
1004                         if ((*i)->record_enabled ()) {
1005                                 //cerr << "switching to input = " << !Config->get_auto_input() << __FILE__ << __LINE__ << endl << endl;
1006                                 (*i)->monitor_input (Config->get_monitoring_model() == HardwareMonitoring);
1007                         }
1008                 }
1009         }
1010 }
1011
1012 void
1013 Session::auto_punch_start_changed (Location* location)
1014 {
1015         replace_event (Event::PunchIn, location->start());
1016
1017         if (get_record_enabled() && Config->get_punch_in()) {
1018                 /* capture start has been changed, so save new pending state */
1019                 save_state ("", true);
1020         }
1021 }
1022
1023 void
1024 Session::auto_punch_end_changed (Location* location)
1025 {
1026         nframes_t when_to_stop = location->end();
1027         // when_to_stop += _worst_output_latency + _worst_input_latency;
1028         replace_event (Event::PunchOut, when_to_stop);
1029 }
1030
1031 void
1032 Session::auto_punch_changed (Location* location)
1033 {
1034         nframes_t when_to_stop = location->end();
1035
1036         replace_event (Event::PunchIn, location->start());
1037         //when_to_stop += _worst_output_latency + _worst_input_latency;
1038         replace_event (Event::PunchOut, when_to_stop);
1039 }
1040
1041 void
1042 Session::auto_loop_changed (Location* location)
1043 {
1044         replace_event (Event::AutoLoop, location->end(), location->start());
1045
1046         if (transport_rolling() && play_loop) {
1047
1048                 //if (_transport_frame < location->start() || _transport_frame > location->end()) {
1049
1050                 if (_transport_frame > location->end()) {
1051                         // relocate to beginning of loop
1052                         clear_events (Event::LocateRoll);
1053
1054                         request_locate (location->start(), true);
1055
1056                 }
1057                 else if (Config->get_seamless_loop() && !loop_changing) {
1058
1059                         // schedule a locate-roll to refill the diskstreams at the
1060                         // previous loop end
1061                         loop_changing = true;
1062
1063                         if (location->end() > last_loopend) {
1064                                 clear_events (Event::LocateRoll);
1065                                 Event *ev = new Event (Event::LocateRoll, Event::Add, last_loopend, last_loopend, 0, true);
1066                                 queue_event (ev);
1067                         }
1068
1069                 }
1070         }
1071
1072         last_loopend = location->end();
1073
1074 }
1075
1076 void
1077 Session::set_auto_punch_location (Location* location)
1078 {
1079         Location* existing;
1080
1081         if ((existing = _locations.auto_punch_location()) != 0 && existing != location) {
1082                 auto_punch_start_changed_connection.disconnect();
1083                 auto_punch_end_changed_connection.disconnect();
1084                 auto_punch_changed_connection.disconnect();
1085                 existing->set_auto_punch (false, this);
1086                 remove_event (existing->start(), Event::PunchIn);
1087                 clear_events (Event::PunchOut);
1088                 auto_punch_location_changed (0);
1089         }
1090
1091         set_dirty();
1092
1093         if (location == 0) {
1094                 return;
1095         }
1096
1097         if (location->end() <= location->start()) {
1098                 error << _("Session: you can't use that location for auto punch (start <= end)") << endmsg;
1099                 return;
1100         }
1101
1102         auto_punch_start_changed_connection.disconnect();
1103         auto_punch_end_changed_connection.disconnect();
1104         auto_punch_changed_connection.disconnect();
1105
1106         auto_punch_start_changed_connection = location->start_changed.connect (mem_fun (this, &Session::auto_punch_start_changed));
1107         auto_punch_end_changed_connection = location->end_changed.connect (mem_fun (this, &Session::auto_punch_end_changed));
1108         auto_punch_changed_connection = location->changed.connect (mem_fun (this, &Session::auto_punch_changed));
1109
1110         location->set_auto_punch (true, this);
1111         auto_punch_location_changed (location);
1112 }
1113
1114 void
1115 Session::set_auto_loop_location (Location* location)
1116 {
1117         Location* existing;
1118
1119         if ((existing = _locations.auto_loop_location()) != 0 && existing != location) {
1120                 auto_loop_start_changed_connection.disconnect();
1121                 auto_loop_end_changed_connection.disconnect();
1122                 auto_loop_changed_connection.disconnect();
1123                 existing->set_auto_loop (false, this);
1124                 remove_event (existing->end(), Event::AutoLoop);
1125                 auto_loop_location_changed (0);
1126         }
1127
1128         set_dirty();
1129
1130         if (location == 0) {
1131                 return;
1132         }
1133
1134         if (location->end() <= location->start()) {
1135                 error << _("Session: you can't use a mark for auto loop") << endmsg;
1136                 return;
1137         }
1138
1139         last_loopend = location->end();
1140
1141         auto_loop_start_changed_connection.disconnect();
1142         auto_loop_end_changed_connection.disconnect();
1143         auto_loop_changed_connection.disconnect();
1144
1145         auto_loop_start_changed_connection = location->start_changed.connect (mem_fun (this, &Session::auto_loop_changed));
1146         auto_loop_end_changed_connection = location->end_changed.connect (mem_fun (this, &Session::auto_loop_changed));
1147         auto_loop_changed_connection = location->changed.connect (mem_fun (this, &Session::auto_loop_changed));
1148
1149         location->set_auto_loop (true, this);
1150         auto_loop_location_changed (location);
1151 }
1152
1153 void
1154 Session::locations_added (Location* ignored)
1155 {
1156         set_dirty ();
1157 }
1158
1159 void
1160 Session::locations_changed ()
1161 {
1162         _locations.apply (*this, &Session::handle_locations_changed);
1163 }
1164
1165 void
1166 Session::handle_locations_changed (Locations::LocationList& locations)
1167 {
1168         Locations::LocationList::iterator i;
1169         Location* location;
1170         bool set_loop = false;
1171         bool set_punch = false;
1172
1173         for (i = locations.begin(); i != locations.end(); ++i) {
1174
1175                 location =* i;
1176
1177                 if (location->is_auto_punch()) {
1178                         set_auto_punch_location (location);
1179                         set_punch = true;
1180                 }
1181                 if (location->is_auto_loop()) {
1182                         set_auto_loop_location (location);
1183                         set_loop = true;
1184                 }
1185
1186         }
1187
1188         if (!set_loop) {
1189                 set_auto_loop_location (0);
1190         }
1191         if (!set_punch) {
1192                 set_auto_punch_location (0);
1193         }
1194
1195         set_dirty();
1196 }
1197
1198 void
1199 Session::enable_record ()
1200 {
1201         /* XXX really atomic compare+swap here */
1202         if (g_atomic_int_get (&_record_status) != Recording) {
1203                 g_atomic_int_set (&_record_status, Recording);
1204                 _last_record_location = _transport_frame;
1205                 send_mmc_in_another_thread (MIDI::MachineControl::cmdRecordStrobe);
1206
1207                 if (Config->get_monitoring_model() == HardwareMonitoring && Config->get_auto_input()) {
1208                         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
1209                         for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
1210                                 if ((*i)->record_enabled ()) {
1211                                         (*i)->monitor_input (true);
1212                                 }
1213                         }
1214                 }
1215
1216                 RecordStateChanged ();
1217         }
1218 }
1219
1220 void
1221 Session::disable_record (bool rt_context, bool force)
1222 {
1223         RecordState rs;
1224
1225         if ((rs = (RecordState) g_atomic_int_get (&_record_status)) != Disabled) {
1226
1227                 if (!Config->get_latched_record_enable () || force) {
1228                         g_atomic_int_set (&_record_status, Disabled);
1229                 } else {
1230                         if (rs == Recording) {
1231                                 g_atomic_int_set (&_record_status, Enabled);
1232                         }
1233                 }
1234
1235                 send_mmc_in_another_thread (MIDI::MachineControl::cmdRecordExit);
1236
1237                 if (Config->get_monitoring_model() == HardwareMonitoring && Config->get_auto_input()) {
1238                         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
1239
1240                         for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
1241                                 if ((*i)->record_enabled ()) {
1242                                         (*i)->monitor_input (false);
1243                                 }
1244                         }
1245                 }
1246
1247                 RecordStateChanged (); /* emit signal */
1248
1249                 if (!rt_context) {
1250                         remove_pending_capture_state ();
1251                 }
1252         }
1253 }
1254
1255 void
1256 Session::step_back_from_record ()
1257 {
1258         g_atomic_int_set (&_record_status, Enabled);
1259
1260         if (Config->get_monitoring_model() == HardwareMonitoring) {
1261                 boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
1262
1263                 for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
1264                         if (Config->get_auto_input() && (*i)->record_enabled ()) {
1265                                 //cerr << "switching from input" << __FILE__ << __LINE__ << endl << endl;
1266                                 (*i)->monitor_input (false);
1267                         }
1268                 }
1269         }
1270 }
1271
1272 void
1273 Session::maybe_enable_record ()
1274 {
1275         g_atomic_int_set (&_record_status, Enabled);
1276
1277         /* this function is currently called from somewhere other than an RT thread.
1278            this save_state() call therefore doesn't impact anything.
1279         */
1280
1281         save_state ("", true);
1282
1283         if (_transport_speed) {
1284                 if (!Config->get_punch_in()) {
1285                         enable_record ();
1286                 }
1287         } else {
1288                 send_mmc_in_another_thread (MIDI::MachineControl::cmdRecordPause);
1289                 RecordStateChanged (); /* EMIT SIGNAL */
1290         }
1291
1292         set_dirty();
1293 }
1294
1295 nframes_t
1296 Session::audible_frame () const
1297 {
1298         nframes_t ret;
1299         nframes_t offset;
1300         nframes_t tf;
1301
1302         /* the first of these two possible settings for "offset"
1303            mean that the audible frame is stationary until
1304            audio emerges from the latency compensation
1305            "pseudo-pipeline".
1306
1307            the second means that the audible frame is stationary
1308            until audio would emerge from a physical port
1309            in the absence of any plugin latency compensation
1310         */
1311
1312         offset = _worst_output_latency;
1313
1314         if (offset > current_block_size) {
1315                 offset -= current_block_size;
1316         } else {
1317                 /* XXX is this correct? if we have no external
1318                    physical connections and everything is internal
1319                    then surely this is zero? still, how
1320                    likely is that anyway?
1321                 */
1322                 offset = current_block_size;
1323         }
1324
1325         if (synced_to_jack()) {
1326                 tf = _engine.transport_frame();
1327         } else {
1328                 tf = _transport_frame;
1329         }
1330
1331         if (_transport_speed == 0) {
1332                 return tf;
1333         }
1334
1335         if (tf < offset) {
1336                 return 0;
1337         }
1338
1339         ret = tf;
1340
1341         if (!non_realtime_work_pending()) {
1342
1343                 /* MOVING */
1344
1345                 /* take latency into account */
1346
1347                 ret -= offset;
1348         }
1349
1350         return ret;
1351 }
1352
1353 void
1354 Session::set_frame_rate (nframes_t frames_per_second)
1355 {
1356         /** \fn void Session::set_frame_size(nframes_t)
1357                 the AudioEngine object that calls this guarantees
1358                 that it will not be called while we are also in
1359                 ::process(). Its fine to do things that block
1360                 here.
1361         */
1362
1363         _base_frame_rate = frames_per_second;
1364
1365         sync_time_vars();
1366
1367         Route::set_automation_interval ((jack_nframes_t) ceil ((double) frames_per_second * 0.25));
1368
1369         // XXX we need some equivalent to this, somehow
1370         // SndFileSource::setup_standard_crossfades (frames_per_second);
1371
1372         set_dirty();
1373
1374         /* XXX need to reset/reinstantiate all LADSPA plugins */
1375 }
1376
1377 void
1378 Session::set_block_size (nframes_t nframes)
1379 {
1380         /* the AudioEngine guarantees
1381            that it will not be called while we are also in
1382            ::process(). It is therefore fine to do things that block
1383            here.
1384         */
1385
1386         {
1387                 vector<Sample*>::iterator i;
1388                 uint32_t np;
1389
1390                 current_block_size = nframes;
1391
1392                 for (np = 0, i = _passthru_buffers.begin(); i != _passthru_buffers.end(); ++i, ++np) {
1393                         free (*i);
1394                 }
1395
1396                 for (vector<Sample*>::iterator i = _silent_buffers.begin(); i != _silent_buffers.end(); ++i) {
1397                         free (*i);
1398                 }
1399
1400                 _passthru_buffers.clear ();
1401                 _silent_buffers.clear ();
1402
1403                 ensure_passthru_buffers (np);
1404
1405                 for (vector<Sample*>::iterator i = _send_buffers.begin(); i != _send_buffers.end(); ++i) {
1406                         free(*i);
1407
1408                         Sample *buf;
1409 #ifdef NO_POSIX_MEMALIGN
1410                         buf = (Sample *) malloc(current_block_size * sizeof(Sample));
1411 #else
1412                         posix_memalign((void **)&buf,16,current_block_size * 4);
1413 #endif
1414                         *i = buf;
1415
1416                         memset (*i, 0, sizeof (Sample) * current_block_size);
1417                 }
1418
1419
1420                 if (_gain_automation_buffer) {
1421                         delete [] _gain_automation_buffer;
1422                 }
1423                 _gain_automation_buffer = new gain_t[nframes];
1424
1425                 allocate_pan_automation_buffers (nframes, _npan_buffers, true);
1426
1427                 boost::shared_ptr<RouteList> r = routes.reader ();
1428
1429                 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1430                         (*i)->set_block_size (nframes);
1431                 }
1432
1433                 boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
1434                 for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
1435                         (*i)->set_block_size (nframes);
1436                 }
1437
1438                 set_worst_io_latencies ();
1439         }
1440 }
1441
1442 void
1443 Session::set_default_fade (float steepness, float fade_msecs)
1444 {
1445 #if 0
1446         nframes_t fade_frames;
1447
1448         /* Don't allow fade of less 1 frame */
1449
1450         if (fade_msecs < (1000.0 * (1.0/_current_frame_rate))) {
1451
1452                 fade_msecs = 0;
1453                 fade_frames = 0;
1454
1455         } else {
1456
1457                 fade_frames = (nframes_t) floor (fade_msecs * _current_frame_rate * 0.001);
1458
1459         }
1460
1461         default_fade_msecs = fade_msecs;
1462         default_fade_steepness = steepness;
1463
1464         {
1465                 // jlc, WTF is this!
1466                 Glib::RWLock::ReaderLock lm (route_lock);
1467                 AudioRegion::set_default_fade (steepness, fade_frames);
1468         }
1469
1470         set_dirty();
1471
1472         /* XXX have to do this at some point */
1473         /* foreach region using default fade, reset, then
1474            refill_all_diskstream_buffers ();
1475         */
1476 #endif
1477 }
1478
1479 struct RouteSorter {
1480     bool operator() (boost::shared_ptr<Route> r1, boost::shared_ptr<Route> r2) {
1481             if (r1->fed_by.find (r2) != r1->fed_by.end()) {
1482                     return false;
1483             } else if (r2->fed_by.find (r1) != r2->fed_by.end()) {
1484                     return true;
1485             } else {
1486                     if (r1->fed_by.empty()) {
1487                             if (r2->fed_by.empty()) {
1488                                     /* no ardour-based connections inbound to either route. just use signal order */
1489                                     return r1->order_key(N_("signal")) < r2->order_key(N_("signal"));
1490                             } else {
1491                                     /* r2 has connections, r1 does not; run r1 early */
1492                                     return true;
1493                             }
1494                     } else {
1495                             return r1->order_key(N_("signal")) < r2->order_key(N_("signal"));
1496                     }
1497             }
1498     }
1499 };
1500
1501 static void
1502 trace_terminal (shared_ptr<Route> r1, shared_ptr<Route> rbase)
1503 {
1504         shared_ptr<Route> r2;
1505
1506         if ((r1->fed_by.find (rbase) != r1->fed_by.end()) && (rbase->fed_by.find (r1) != rbase->fed_by.end())) {
1507                 info << string_compose(_("feedback loop setup between %1 and %2"), r1->name(), rbase->name()) << endmsg;
1508                 return;
1509         }
1510
1511         /* make a copy of the existing list of routes that feed r1 */
1512
1513         set<shared_ptr<Route> > existing = r1->fed_by;
1514
1515         /* for each route that feeds r1, recurse, marking it as feeding
1516            rbase as well.
1517         */
1518
1519         for (set<shared_ptr<Route> >::iterator i = existing.begin(); i != existing.end(); ++i) {
1520                 r2 =* i;
1521
1522                 /* r2 is a route that feeds r1 which somehow feeds base. mark
1523                    base as being fed by r2
1524                 */
1525
1526                 rbase->fed_by.insert (r2);
1527
1528                 if (r2 != rbase) {
1529
1530                         /* 2nd level feedback loop detection. if r1 feeds or is fed by r2,
1531                            stop here.
1532                          */
1533
1534                         if ((r1->fed_by.find (r2) != r1->fed_by.end()) && (r2->fed_by.find (r1) != r2->fed_by.end())) {
1535                                 continue;
1536                         }
1537
1538                         /* now recurse, so that we can mark base as being fed by
1539                            all routes that feed r2
1540                         */
1541
1542                         trace_terminal (r2, rbase);
1543                 }
1544
1545         }
1546 }
1547
1548 void
1549 Session::resort_routes ()
1550 {
1551         /* don't do anything here with signals emitted
1552            by Routes while we are being destroyed.
1553         */
1554
1555         if (_state_of_the_state & Deletion) {
1556                 return;
1557         }
1558
1559
1560         {
1561
1562                 RCUWriter<RouteList> writer (routes);
1563                 shared_ptr<RouteList> r = writer.get_copy ();
1564                 resort_routes_using (r);
1565                 /* writer goes out of scope and forces update */
1566         }
1567
1568 }
1569 void
1570 Session::resort_routes_using (shared_ptr<RouteList> r)
1571 {
1572         RouteList::iterator i, j;
1573
1574         for (i = r->begin(); i != r->end(); ++i) {
1575
1576                 (*i)->fed_by.clear ();
1577
1578                 for (j = r->begin(); j != r->end(); ++j) {
1579
1580                         /* although routes can feed themselves, it will
1581                            cause an endless recursive descent if we
1582                            detect it. so don't bother checking for
1583                            self-feeding.
1584                         */
1585
1586                         if (*j == *i) {
1587                                 continue;
1588                         }
1589
1590                         if ((*j)->feeds (*i)) {
1591                                 (*i)->fed_by.insert (*j);
1592                         }
1593                 }
1594         }
1595
1596         for (i = r->begin(); i != r->end(); ++i) {
1597                 trace_terminal (*i, *i);
1598         }
1599
1600         RouteSorter cmp;
1601         r->sort (cmp);
1602
1603         /* don't leave dangling references to routes in Route::fed_by */
1604
1605         for (i = r->begin(); i != r->end(); ++i) {
1606                 (*i)->fed_by.clear ();
1607         }
1608
1609 #if 0
1610         cerr << "finished route resort\n";
1611
1612         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1613                 cerr << " " << (*i)->name() << " signal order = " << (*i)->order_key ("signal") << endl;
1614         }
1615         cerr << endl;
1616 #endif
1617
1618 }
1619
1620 list<boost::shared_ptr<AudioTrack> >
1621 Session::new_audio_track (int input_channels, int output_channels, TrackMode mode, uint32_t how_many)
1622 {
1623         char track_name[32];
1624         uint32_t track_id = 0;
1625         uint32_t n = 0;
1626         uint32_t channels_used = 0;
1627         string port;
1628         RouteList new_routes;
1629         list<boost::shared_ptr<AudioTrack> > ret;
1630         uint32_t control_id;
1631
1632         /* count existing audio tracks */
1633
1634         {
1635                 shared_ptr<RouteList> r = routes.reader ();
1636
1637                 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1638                         if (dynamic_cast<AudioTrack*>((*i).get()) != 0) {
1639                                 if (!(*i)->hidden()) {
1640                                         n++;
1641                                         channels_used += (*i)->n_inputs();
1642                                 }
1643                         }
1644                 }
1645         }
1646
1647         vector<string> physinputs;
1648         vector<string> physoutputs;
1649         uint32_t nphysical_in;
1650         uint32_t nphysical_out;
1651
1652         _engine.get_physical_outputs (physoutputs);
1653         _engine.get_physical_inputs (physinputs);
1654         control_id = ntracks() + nbusses() + 1;
1655
1656         while (how_many) {
1657
1658                 /* check for duplicate route names, since we might have pre-existing
1659                    routes with this name (e.g. create Audio1, Audio2, delete Audio1,
1660                    save, close,restart,add new route - first named route is now
1661                    Audio2)
1662                 */
1663
1664
1665                 do {
1666                         ++track_id;
1667
1668                         snprintf (track_name, sizeof(track_name), "Audio %" PRIu32, track_id);
1669
1670                         if (route_by_name (track_name) == 0) {
1671                                 break;
1672                         }
1673
1674                 } while (track_id < (UINT_MAX-1));
1675
1676                 if (Config->get_input_auto_connect() & AutoConnectPhysical) {
1677                         nphysical_in = min (n_physical_inputs, (uint32_t) physinputs.size());
1678                 } else {
1679                         nphysical_in = 0;
1680                 }
1681
1682                 if (Config->get_output_auto_connect() & AutoConnectPhysical) {
1683                         nphysical_out = min (n_physical_outputs, (uint32_t) physinputs.size());
1684                 } else {
1685                         nphysical_out = 0;
1686                 }
1687
1688                 try {
1689                         shared_ptr<AudioTrack> track (new AudioTrack (*this, track_name, Route::Flag (0), mode));
1690
1691                         if (track->ensure_io (input_channels, output_channels, false, this)) {
1692                                 error << string_compose (_("cannot configure %1 in/%2 out configuration for new audio track"),
1693                                                          input_channels, output_channels)
1694                                       << endmsg;
1695                         }
1696
1697                         if (nphysical_in) {
1698                                 for (uint32_t x = 0; x < track->n_inputs() && x < nphysical_in; ++x) {
1699
1700                                         port = "";
1701
1702                                         if (Config->get_input_auto_connect() & AutoConnectPhysical) {
1703                                                 port = physinputs[(channels_used+x)%nphysical_in];
1704                                         }
1705
1706                                         if (port.length() && track->connect_input (track->input (x), port, this)) {
1707                                                 break;
1708                                         }
1709                                 }
1710                         }
1711
1712                         for (uint32_t x = 0; x < track->n_outputs(); ++x) {
1713
1714                                 port = "";
1715
1716                                 if (nphysical_out && (Config->get_output_auto_connect() & AutoConnectPhysical)) {
1717                                         port = physoutputs[(channels_used+x)%nphysical_out];
1718                                 } else if (Config->get_output_auto_connect() & AutoConnectMaster) {
1719                                         if (_master_out) {
1720                                                 port = _master_out->input (x%_master_out->n_inputs())->name();
1721                                         }
1722                                 }
1723
1724                                 if (port.length() && track->connect_output (track->output (x), port, this)) {
1725                                         break;
1726                                 }
1727                         }
1728
1729                         channels_used += track->n_inputs ();
1730
1731                         if (_control_out) {
1732                                 vector<string> cports;
1733                                 uint32_t ni = _control_out->n_inputs();
1734
1735                                 for (n = 0; n < ni; ++n) {
1736                                         cports.push_back (_control_out->input(n)->name());
1737                                 }
1738
1739                                 track->set_control_outs (cports);
1740                         }
1741
1742                         // assert (current_thread != RT_thread)
1743
1744                         track->audio_diskstream()->non_realtime_input_change();
1745
1746                         track->DiskstreamChanged.connect (mem_fun (this, &Session::resort_routes));
1747                         track->set_remote_control_id (control_id);
1748                         ++control_id;
1749
1750                         new_routes.push_back (track);
1751                         ret.push_back (track);
1752                 }
1753
1754                 catch (failed_constructor &err) {
1755                         error << _("Session: could not create new audio track.") << endmsg;
1756                         // XXX should we delete the tracks already created?
1757                         ret.clear ();
1758                         return ret;
1759                 }
1760
1761                 --how_many;
1762         }
1763
1764         if (!new_routes.empty()) {
1765                 add_routes (new_routes, false);
1766                 save_state (_current_snapshot_name);
1767         }
1768
1769         return ret;
1770 }
1771
1772 Session::RouteList
1773 Session::new_audio_route (int input_channels, int output_channels, uint32_t how_many)
1774 {
1775         char bus_name[32];
1776         uint32_t bus_id = 1;
1777         uint32_t n = 0;
1778         string port;
1779         RouteList ret;
1780         uint32_t control_id;
1781
1782         /* count existing audio busses */
1783
1784         {
1785                 shared_ptr<RouteList> r = routes.reader ();
1786
1787                 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1788                         if (dynamic_cast<AudioTrack*>((*i).get()) == 0) {
1789                                 if (!(*i)->hidden()) {
1790                                         bus_id++;
1791                                 }
1792                         }
1793                 }
1794         }
1795
1796         vector<string> physinputs;
1797         vector<string> physoutputs;
1798
1799         _engine.get_physical_outputs (physoutputs);
1800         _engine.get_physical_inputs (physinputs);
1801         control_id = ntracks() + nbusses() + 1;
1802
1803         while (how_many) {
1804
1805                 do {
1806                         ++bus_id;
1807
1808                         snprintf (bus_name, sizeof(bus_name), "Bus %" PRIu32, bus_id);
1809
1810                         if (route_by_name (bus_name) == 0) {
1811                                 break;
1812                         }
1813
1814                 } while (bus_id < (UINT_MAX-1));
1815
1816                 try {
1817                         shared_ptr<Route> bus (new Route (*this, bus_name, -1, -1, -1, -1, Route::Flag(0), DataType::AUDIO));
1818
1819                         if (bus->ensure_io (input_channels, output_channels, false, this)) {
1820                                 error << string_compose (_("cannot configure %1 in/%2 out configuration for new audio track"),
1821                                                          input_channels, output_channels)
1822                                       << endmsg;
1823                         }
1824
1825                         for (uint32_t x = 0; n_physical_inputs && x < bus->n_inputs(); ++x) {
1826
1827                                 port = "";
1828
1829                                 if (Config->get_input_auto_connect() & AutoConnectPhysical) {
1830                                                 port = physinputs[((n+x)%n_physical_inputs)];
1831                                 }
1832
1833                                 if (port.length() && bus->connect_input (bus->input (x), port, this)) {
1834                                         break;
1835                                 }
1836                         }
1837
1838                         for (uint32_t x = 0; n_physical_outputs && x < bus->n_outputs(); ++x) {
1839
1840                                 port = "";
1841
1842                                 if (Config->get_output_auto_connect() & AutoConnectPhysical) {
1843                                         port = physoutputs[((n+x)%n_physical_outputs)];
1844                                 } else if (Config->get_output_auto_connect() & AutoConnectMaster) {
1845                                         if (_master_out) {
1846                                                 port = _master_out->input (x%_master_out->n_inputs())->name();
1847                                         }
1848                                 }
1849
1850                                 if (port.length() && bus->connect_output (bus->output (x), port, this)) {
1851                                         break;
1852                                 }
1853                         }
1854
1855                         if (_control_out) {
1856                                 vector<string> cports;
1857                                 uint32_t ni = _control_out->n_inputs();
1858
1859                                 for (uint32_t n = 0; n < ni; ++n) {
1860                                         cports.push_back (_control_out->input(n)->name());
1861                                 }
1862                                 bus->set_control_outs (cports);
1863                         }
1864
1865                         bus->set_remote_control_id (control_id);
1866                         ++control_id;
1867
1868                         ret.push_back (bus);
1869                 }
1870
1871
1872                 catch (failed_constructor &err) {
1873                         error << _("Session: could not create new audio route.") << endmsg;
1874                         ret.clear ();
1875                         return ret;
1876                 }
1877
1878                 --how_many;
1879         }
1880
1881         if (!ret.empty()) {
1882                 add_routes (ret, false);
1883                 save_state (_current_snapshot_name);
1884         }
1885
1886         return ret;
1887
1888 }
1889
1890 void
1891 Session::add_routes (RouteList& new_routes, bool save)
1892 {
1893         {
1894                 RCUWriter<RouteList> writer (routes);
1895                 shared_ptr<RouteList> r = writer.get_copy ();
1896                 r->insert (r->end(), new_routes.begin(), new_routes.end());
1897                 resort_routes_using (r);
1898         }
1899
1900         for (RouteList::iterator x = new_routes.begin(); x != new_routes.end(); ++x) {
1901
1902                 boost::weak_ptr<Route> wpr (*x);
1903
1904                 (*x)->solo_changed.connect (sigc::bind (mem_fun (*this, &Session::route_solo_changed), wpr));
1905                 (*x)->mute_changed.connect (mem_fun (*this, &Session::route_mute_changed));
1906                 (*x)->output_changed.connect (mem_fun (*this, &Session::set_worst_io_latencies_x));
1907                 (*x)->redirects_changed.connect (mem_fun (*this, &Session::update_latency_compensation_proxy));
1908
1909                 if ((*x)->master()) {
1910                         _master_out = (*x);
1911                 }
1912
1913                 if ((*x)->control()) {
1914                         _control_out = (*x);
1915                 }
1916         }
1917
1918         set_dirty();
1919
1920         if (save) {
1921                 save_state (_current_snapshot_name);
1922         }
1923
1924         RouteAdded (new_routes); /* EMIT SIGNAL */
1925 }
1926
1927 void
1928 Session::add_diskstream (boost::shared_ptr<Diskstream> dstream)
1929 {
1930         /* need to do this in case we're rolling at the time, to prevent false underruns */
1931         dstream->do_refill_with_alloc();
1932
1933         {
1934                 RCUWriter<DiskstreamList> writer (diskstreams);
1935                 boost::shared_ptr<DiskstreamList> ds = writer.get_copy();
1936                 ds->push_back (dstream);
1937         }
1938
1939         dstream->set_block_size (current_block_size);
1940
1941         dstream->PlaylistChanged.connect (sigc::bind (mem_fun (*this, &Session::diskstream_playlist_changed), dstream));
1942         /* this will connect to future changes, and check the current length */
1943         diskstream_playlist_changed (dstream);
1944
1945         dstream->prepare ();
1946 }
1947
1948 void
1949 Session::remove_route (shared_ptr<Route> route)
1950 {
1951         {
1952                 RCUWriter<RouteList> writer (routes);
1953                 shared_ptr<RouteList> rs = writer.get_copy ();
1954
1955                 rs->remove (route);
1956
1957                 /* deleting the master out seems like a dumb
1958                    idea, but its more of a UI policy issue
1959                    than our concern.
1960                 */
1961
1962                 if (route == _master_out) {
1963                         _master_out = shared_ptr<Route> ();
1964                 }
1965
1966                 if (route == _control_out) {
1967                         _control_out = shared_ptr<Route> ();
1968
1969                         /* cancel control outs for all routes */
1970
1971                         vector<string> empty;
1972
1973                         for (RouteList::iterator r = rs->begin(); r != rs->end(); ++r) {
1974                                 (*r)->set_control_outs (empty);
1975                         }
1976                 }
1977
1978                 update_route_solo_state ();
1979
1980                 /* writer goes out of scope, forces route list update */
1981         }
1982
1983         // FIXME: audio specific
1984         AudioTrack* at;
1985         boost::shared_ptr<AudioDiskstream> ds;
1986
1987         if ((at = dynamic_cast<AudioTrack*>(route.get())) != 0) {
1988                 ds = at->audio_diskstream();
1989         }
1990
1991         if (ds) {
1992
1993                 {
1994                         RCUWriter<DiskstreamList> dsl (diskstreams);
1995                         boost::shared_ptr<DiskstreamList> d = dsl.get_copy();
1996                         d->remove (ds);
1997                 }
1998         }
1999
2000         find_current_end ();
2001
2002         update_latency_compensation (false, false);
2003         set_dirty();
2004
2005         // We need to disconnect the routes inputs and outputs
2006         route->disconnect_inputs(NULL);
2007         route->disconnect_outputs(NULL);
2008
2009         /* get rid of it from the dead wood collection in the route list manager */
2010
2011         /* XXX i think this is unsafe as it currently stands, but i am not sure. (pd, october 2nd, 2006) */
2012
2013         routes.flush ();
2014
2015         /* try to cause everyone to drop their references */
2016
2017         route->drop_references ();
2018
2019         /* save the new state of the world */
2020
2021         if (save_state (_current_snapshot_name)) {
2022                 save_history (_current_snapshot_name);
2023         }
2024 }
2025
2026 void
2027 Session::route_mute_changed (void* src)
2028 {
2029         set_dirty ();
2030 }
2031
2032 void
2033 Session::route_solo_changed (void* src, boost::weak_ptr<Route> wpr)
2034 {
2035         if (solo_update_disabled) {
2036                 // We know already
2037                 return;
2038         }
2039
2040         bool is_track;
2041         boost::shared_ptr<Route> route = wpr.lock ();
2042
2043         if (!route) {
2044                 /* should not happen */
2045                 error << string_compose (_("programming error: %1"), X_("invalid route weak ptr passed to route_solo_changed")) << endmsg;
2046                 return;
2047         }
2048
2049         is_track = (boost::dynamic_pointer_cast<AudioTrack>(route) != 0);
2050
2051         shared_ptr<RouteList> r = routes.reader ();
2052
2053         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
2054
2055                 /* soloing a track mutes all other tracks, soloing a bus mutes all other busses */
2056
2057                 if (is_track) {
2058
2059                         /* don't mess with busses */
2060
2061                         if (dynamic_cast<AudioTrack*>((*i).get()) == 0) {
2062                                 continue;
2063                         }
2064
2065                 } else {
2066
2067                         /* don't mess with tracks */
2068
2069                         if (dynamic_cast<AudioTrack*>((*i).get()) != 0) {
2070                                 continue;
2071                         }
2072                 }
2073
2074                 if ((*i) != route &&
2075                     ((*i)->mix_group () == 0 ||
2076                      (*i)->mix_group () != route->mix_group () ||
2077                      !route->mix_group ()->is_active())) {
2078
2079                         if ((*i)->soloed()) {
2080
2081                                 /* if its already soloed, and solo latching is enabled,
2082                                    then leave it as it is.
2083                                 */
2084
2085                                 if (Config->get_solo_latched()) {
2086                                         continue;
2087                                 }
2088                         }
2089
2090                         /* do it */
2091
2092                         solo_update_disabled = true;
2093                         (*i)->set_solo (false, src);
2094                         solo_update_disabled = false;
2095                 }
2096         }
2097
2098         bool something_soloed = false;
2099         bool same_thing_soloed = false;
2100         bool signal = false;
2101
2102         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
2103                 if ((*i)->soloed()) {
2104                         something_soloed = true;
2105                         if (dynamic_cast<AudioTrack*>((*i).get())) {
2106                                 if (is_track) {
2107                                         same_thing_soloed = true;
2108                                         break;
2109                                 }
2110                         } else {
2111                                 if (!is_track) {
2112                                         same_thing_soloed = true;
2113                                         break;
2114                                 }
2115                         }
2116                         break;
2117                 }
2118         }
2119
2120         if (something_soloed != currently_soloing) {
2121                 signal = true;
2122                 currently_soloing = something_soloed;
2123         }
2124
2125         modify_solo_mute (is_track, same_thing_soloed);
2126
2127         if (signal) {
2128                 SoloActive (currently_soloing); /* EMIT SIGNAL */
2129         }
2130
2131         SoloChanged (); /* EMIT SIGNAL */
2132
2133         set_dirty();
2134 }
2135
2136 void
2137 Session::update_route_solo_state ()
2138 {
2139         bool mute = false;
2140         bool is_track = false;
2141         bool signal = false;
2142
2143         /* caller must hold RouteLock */
2144
2145         /* this is where we actually implement solo by changing
2146            the solo mute setting of each track.
2147         */
2148
2149         shared_ptr<RouteList> r = routes.reader ();
2150
2151         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
2152                 if ((*i)->soloed()) {
2153                         mute = true;
2154                         if (dynamic_cast<AudioTrack*>((*i).get())) {
2155                                 is_track = true;
2156                         }
2157                         break;
2158                 }
2159         }
2160
2161         if (mute != currently_soloing) {
2162                 signal = true;
2163                 currently_soloing = mute;
2164         }
2165
2166         if (!is_track && !mute) {
2167
2168                 /* nothing is soloed */
2169
2170                 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
2171                         (*i)->set_solo_mute (false);
2172                 }
2173
2174                 if (signal) {
2175                         SoloActive (false);
2176                 }
2177
2178                 return;
2179         }
2180
2181         modify_solo_mute (is_track, mute);
2182
2183         if (signal) {
2184                 SoloActive (currently_soloing);
2185         }
2186 }
2187
2188 void
2189 Session::modify_solo_mute (bool is_track, bool mute)
2190 {
2191         shared_ptr<RouteList> r = routes.reader ();
2192
2193         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
2194
2195                 if (is_track) {
2196
2197                         /* only alter track solo mute */
2198
2199                         if (dynamic_cast<AudioTrack*>((*i).get())) {
2200                                 if ((*i)->soloed()) {
2201                                         (*i)->set_solo_mute (!mute);
2202                                 } else {
2203                                         (*i)->set_solo_mute (mute);
2204                                 }
2205                         }
2206
2207                 } else {
2208
2209                         /* only alter bus solo mute */
2210
2211                         if (!dynamic_cast<AudioTrack*>((*i).get())) {
2212
2213                                 if ((*i)->soloed()) {
2214
2215                                         (*i)->set_solo_mute (false);
2216
2217                                 } else {
2218
2219                                         /* don't mute master or control outs
2220                                            in response to another bus solo
2221                                         */
2222
2223                                         if ((*i) != _master_out &&
2224                                             (*i) != _control_out) {
2225                                                 (*i)->set_solo_mute (mute);
2226                                         }
2227                                 }
2228                         }
2229
2230                 }
2231         }
2232 }
2233
2234
2235 void
2236 Session::catch_up_on_solo ()
2237 {
2238         /* this is called after set_state() to catch the full solo
2239            state, which can't be correctly determined on a per-route
2240            basis, but needs the global overview that only the session
2241            has.
2242         */
2243         update_route_solo_state();
2244 }
2245
2246 shared_ptr<Route>
2247 Session::route_by_name (string name)
2248 {
2249         shared_ptr<RouteList> r = routes.reader ();
2250
2251         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
2252                 if ((*i)->name() == name) {
2253                         return *i;
2254                 }
2255         }
2256
2257         return shared_ptr<Route> ((Route*) 0);
2258 }
2259
2260 shared_ptr<Route>
2261 Session::route_by_id (PBD::ID id)
2262 {
2263         shared_ptr<RouteList> r = routes.reader ();
2264
2265         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
2266                 if ((*i)->id() == id) {
2267                         return *i;
2268                 }
2269         }
2270
2271         return shared_ptr<Route> ((Route*) 0);
2272 }
2273
2274 shared_ptr<Route>
2275 Session::route_by_remote_id (uint32_t id)
2276 {
2277         shared_ptr<RouteList> r = routes.reader ();
2278
2279         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
2280                 if ((*i)->remote_control_id() == id) {
2281                         return *i;
2282                 }
2283         }
2284
2285         return shared_ptr<Route> ((Route*) 0);
2286 }
2287
2288 void
2289 Session::find_current_end ()
2290 {
2291         if (_state_of_the_state & Loading) {
2292                 return;
2293         }
2294
2295         nframes_t max = get_maximum_extent ();
2296
2297         if (max > end_location->end()) {
2298                 end_location->set_end (max);
2299                 set_dirty();
2300                 DurationChanged(); /* EMIT SIGNAL */
2301         }
2302 }
2303
2304 nframes_t
2305 Session::get_maximum_extent () const
2306 {
2307         nframes_t max = 0;
2308         nframes_t me;
2309
2310         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
2311
2312         for (DiskstreamList::const_iterator i = dsl->begin(); i != dsl->end(); ++i) {
2313                 boost::shared_ptr<Playlist> pl = (*i)->playlist();
2314                 if ((me = pl->get_maximum_extent()) > max) {
2315                         max = me;
2316                 }
2317         }
2318
2319         return max;
2320 }
2321
2322 boost::shared_ptr<Diskstream>
2323 Session::diskstream_by_name (string name)
2324 {
2325         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
2326
2327         for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
2328                 if ((*i)->name() == name) {
2329                         return *i;
2330                 }
2331         }
2332
2333         return boost::shared_ptr<Diskstream>((Diskstream*) 0);
2334 }
2335
2336 boost::shared_ptr<Diskstream>
2337 Session::diskstream_by_id (const PBD::ID& id)
2338 {
2339         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
2340
2341         for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
2342                 if ((*i)->id() == id) {
2343                         return *i;
2344                 }
2345         }
2346
2347         return boost::shared_ptr<Diskstream>((Diskstream*) 0);
2348 }
2349
2350 /* AudioRegion management */
2351
2352 string
2353 Session::new_region_name (string old)
2354 {
2355         string::size_type last_period;
2356         uint32_t number;
2357         string::size_type len = old.length() + 64;
2358         char buf[len];
2359
2360         if ((last_period = old.find_last_of ('.')) == string::npos) {
2361
2362                 /* no period present - add one explicitly */
2363
2364                 old += '.';
2365                 last_period = old.length() - 1;
2366                 number = 0;
2367
2368         } else {
2369
2370                 number = atoi (old.substr (last_period+1).c_str());
2371
2372         }
2373
2374         while (number < (UINT_MAX-1)) {
2375
2376                 AudioRegionList::const_iterator i;
2377                 string sbuf;
2378
2379                 number++;
2380
2381                 snprintf (buf, len, "%s%" PRIu32, old.substr (0, last_period + 1).c_str(), number);
2382                 sbuf = buf;
2383
2384                 for (i = audio_regions.begin(); i != audio_regions.end(); ++i) {
2385                         if (i->second->name() == sbuf) {
2386                                 break;
2387                         }
2388                 }
2389
2390                 if (i == audio_regions.end()) {
2391                         break;
2392                 }
2393         }
2394
2395         if (number != (UINT_MAX-1)) {
2396                 return buf;
2397         }
2398
2399         error << string_compose (_("cannot create new name for region \"%1\""), old) << endmsg;
2400         return old;
2401 }
2402
2403 int
2404 Session::region_name (string& result, string base, bool newlevel) const
2405 {
2406         char buf[16];
2407         string subbase;
2408
2409         if (base == "") {
2410
2411                 Glib::Mutex::Lock lm (region_lock);
2412
2413                 snprintf (buf, sizeof (buf), "%d", (int)audio_regions.size() + 1);
2414
2415
2416                 result = "region.";
2417                 result += buf;
2418
2419         } else {
2420
2421                 /* XXX this is going to be slow. optimize me later */
2422
2423                 if (newlevel) {
2424                         subbase = base;
2425                 } else {
2426                         string::size_type pos;
2427
2428                         pos = base.find_last_of ('.');
2429
2430                         /* pos may be npos, but then we just use entire base */
2431
2432                         subbase = base.substr (0, pos);
2433
2434                 }
2435
2436                 bool name_taken = true;
2437
2438                 {
2439                         Glib::Mutex::Lock lm (region_lock);
2440
2441                         for (int n = 1; n < 5000; ++n) {
2442
2443                                 result = subbase;
2444                                 snprintf (buf, sizeof (buf), ".%d", n);
2445                                 result += buf;
2446
2447                                 name_taken = false;
2448
2449                                 for (AudioRegionList::const_iterator i = audio_regions.begin(); i != audio_regions.end(); ++i) {
2450                                         if (i->second->name() == result) {
2451                                                 name_taken = true;
2452                                                 break;
2453                                         }
2454                                 }
2455
2456                                 if (!name_taken) {
2457                                         break;
2458                                 }
2459                         }
2460                 }
2461
2462                 if (name_taken) {
2463                         fatal << string_compose(_("too many regions with names like %1"), base) << endmsg;
2464                         /*NOTREACHED*/
2465                 }
2466         }
2467         return 0;
2468 }
2469
2470 void
2471 Session::add_region (boost::shared_ptr<Region> region)
2472 {
2473         boost::shared_ptr<AudioRegion> ar;
2474         boost::shared_ptr<AudioRegion> oar;
2475         bool added = false;
2476
2477         {
2478                 Glib::Mutex::Lock lm (region_lock);
2479
2480                 if ((ar = boost::dynamic_pointer_cast<AudioRegion> (region)) != 0) {
2481
2482                         AudioRegionList::iterator x;
2483
2484                         for (x = audio_regions.begin(); x != audio_regions.end(); ++x) {
2485
2486                                 oar = boost::dynamic_pointer_cast<AudioRegion> (x->second);
2487
2488                                 if (ar->region_list_equivalent (oar)) {
2489                                         break;
2490                                 }
2491                         }
2492
2493                         if (x == audio_regions.end()) {
2494
2495                                 pair<AudioRegionList::key_type,AudioRegionList::mapped_type> entry;
2496
2497                                 entry.first = region->id();
2498                                 entry.second = ar;
2499
2500                                 pair<AudioRegionList::iterator,bool> x = audio_regions.insert (entry);
2501
2502
2503                                 if (!x.second) {
2504                                         return;
2505                                 }
2506
2507                                 added = true;
2508                         }
2509
2510                 } else {
2511
2512                         fatal << _("programming error: ")
2513                               << X_("unknown region type passed to Session::add_region()")
2514                               << endmsg;
2515                         /*NOTREACHED*/
2516
2517                 }
2518         }
2519
2520         /* mark dirty because something has changed even if we didn't
2521            add the region to the region list.
2522         */
2523
2524         set_dirty();
2525
2526         if (added) {
2527                 region->GoingAway.connect (sigc::bind (mem_fun (*this, &Session::remove_region), boost::weak_ptr<Region>(region)));
2528                 region->StateChanged.connect (sigc::bind (mem_fun (*this, &Session::region_changed), boost::weak_ptr<Region>(region)));
2529                 AudioRegionAdded (ar); /* EMIT SIGNAL */
2530         }
2531 }
2532
2533 void
2534 Session::region_changed (Change what_changed, boost::weak_ptr<Region> weak_region)
2535 {
2536         boost::shared_ptr<Region> region (weak_region.lock ());
2537
2538         if (!region) {
2539                 return;
2540         }
2541
2542         if (what_changed & Region::HiddenChanged) {
2543                 /* relay hidden changes */
2544                 RegionHiddenChange (region);
2545         }
2546 }
2547
2548 void
2549 Session::remove_region (boost::weak_ptr<Region> weak_region)
2550 {
2551         AudioRegionList::iterator i;
2552         boost::shared_ptr<Region> region (weak_region.lock ());
2553
2554         if (!region) {
2555                 return;
2556         }
2557
2558         boost::shared_ptr<AudioRegion> ar;
2559         bool removed = false;
2560
2561         {
2562                 Glib::Mutex::Lock lm (region_lock);
2563
2564                 if ((ar = boost::dynamic_pointer_cast<AudioRegion> (region)) != 0) {
2565                         if ((i = audio_regions.find (region->id())) != audio_regions.end()) {
2566                                 audio_regions.erase (i);
2567                                 removed = true;
2568                         }
2569
2570                 } else {
2571
2572                         fatal << _("programming error: ")
2573                               << X_("unknown region type passed to Session::remove_region()")
2574                               << endmsg;
2575                         /*NOTREACHED*/
2576                 }
2577         }
2578
2579         /* mark dirty because something has changed even if we didn't
2580            remove the region from the region list.
2581         */
2582
2583         set_dirty();
2584
2585         if (removed) {
2586                 AudioRegionRemoved (ar); /* EMIT SIGNAL */
2587         }
2588 }
2589
2590 boost::shared_ptr<AudioRegion>
2591 Session::find_whole_file_parent (boost::shared_ptr<AudioRegion const> child)
2592 {
2593         AudioRegionList::iterator i;
2594         boost::shared_ptr<AudioRegion> region;
2595         Glib::Mutex::Lock lm (region_lock);
2596
2597         for (i = audio_regions.begin(); i != audio_regions.end(); ++i) {
2598
2599                 region = i->second;
2600
2601                 if (region->whole_file()) {
2602
2603                         if (child->source_equivalent (region)) {
2604                                 return region;
2605                         }
2606                 }
2607         }
2608
2609         return boost::shared_ptr<AudioRegion> ();
2610 }
2611
2612 void
2613 Session::find_equivalent_playlist_regions (boost::shared_ptr<Region> region, vector<boost::shared_ptr<Region> >& result)
2614 {
2615         for (PlaylistList::iterator i = playlists.begin(); i != playlists.end(); ++i)
2616                 (*i)->get_region_list_equivalent_regions (region, result);
2617 }
2618
2619 int
2620 Session::destroy_region (boost::shared_ptr<Region> region)
2621 {
2622         vector<boost::shared_ptr<Source> > srcs;
2623
2624         {
2625                 boost::shared_ptr<AudioRegion> aregion;
2626
2627                 if ((aregion = boost::dynamic_pointer_cast<AudioRegion> (region)) == 0) {
2628                         return 0;
2629                 }
2630
2631                 if (aregion->playlist()) {
2632                         aregion->playlist()->destroy_region (region);
2633                 }
2634
2635                 for (uint32_t n = 0; n < aregion->n_channels(); ++n) {
2636                         srcs.push_back (aregion->source (n));
2637                 }
2638         }
2639
2640         region->drop_references ();
2641
2642         for (vector<boost::shared_ptr<Source> >::iterator i = srcs.begin(); i != srcs.end(); ++i) {
2643
2644                 if (!(*i)->used()) {
2645                         boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*i);
2646
2647                         if (afs) {
2648                                 (afs)->mark_for_remove ();
2649                         }
2650
2651                         (*i)->drop_references ();
2652
2653                         cerr << "source was not used by any playlist\n";
2654                 }
2655         }
2656
2657         return 0;
2658 }
2659
2660 int
2661 Session::destroy_regions (list<boost::shared_ptr<Region> > regions)
2662 {
2663         for (list<boost::shared_ptr<Region> >::iterator i = regions.begin(); i != regions.end(); ++i) {
2664                 destroy_region (*i);
2665         }
2666         return 0;
2667 }
2668
2669 int
2670 Session::remove_last_capture ()
2671 {
2672         list<boost::shared_ptr<Region> > r;
2673
2674         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
2675
2676         for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
2677                 list<boost::shared_ptr<Region> >& l = (*i)->last_capture_regions();
2678
2679                 if (!l.empty()) {
2680                         r.insert (r.end(), l.begin(), l.end());
2681                         l.clear ();
2682                 }
2683         }
2684
2685         destroy_regions (r);
2686         return 0;
2687 }
2688
2689 int
2690 Session::remove_region_from_region_list (boost::shared_ptr<Region> r)
2691 {
2692         remove_region (r);
2693         return 0;
2694 }
2695
2696 /* Source Management */
2697
2698 void
2699 Session::add_source (boost::shared_ptr<Source> source)
2700 {
2701         boost::shared_ptr<AudioFileSource> afs;
2702
2703         if ((afs = boost::dynamic_pointer_cast<AudioFileSource>(source)) != 0) {
2704
2705                 pair<AudioSourceList::key_type, AudioSourceList::mapped_type> entry;
2706                 pair<AudioSourceList::iterator,bool> result;
2707
2708                 entry.first = source->id();
2709                 entry.second = afs;
2710
2711                 {
2712                         Glib::Mutex::Lock lm (audio_source_lock);
2713                         result = audio_sources.insert (entry);
2714                 }
2715
2716                 if (result.second) {
2717                         source->GoingAway.connect (sigc::bind (mem_fun (this, &Session::remove_source), boost::weak_ptr<Source> (source)));
2718                         set_dirty();
2719                 }
2720
2721         }
2722 }
2723
2724 void
2725 Session::remove_source (boost::weak_ptr<Source> src)
2726 {
2727         AudioSourceList::iterator i;
2728         boost::shared_ptr<Source> source = src.lock();
2729
2730         if (!source) {
2731                 return;
2732         }
2733
2734         {
2735                 Glib::Mutex::Lock lm (audio_source_lock);
2736
2737                 if ((i = audio_sources.find (source->id())) != audio_sources.end()) {
2738                         audio_sources.erase (i);
2739                 }
2740         }
2741
2742         if (!_state_of_the_state & InCleanup) {
2743
2744                 /* save state so we don't end up with a session file
2745                    referring to non-existent sources.
2746                 */
2747
2748                 save_state (_current_snapshot_name);
2749         }
2750 }
2751
2752 boost::shared_ptr<Source>
2753 Session::source_by_id (const PBD::ID& id)
2754 {
2755         Glib::Mutex::Lock lm (audio_source_lock);
2756         AudioSourceList::iterator i;
2757         boost::shared_ptr<Source> source;
2758
2759         if ((i = audio_sources.find (id)) != audio_sources.end()) {
2760                 source = i->second;
2761         }
2762
2763         /* XXX search MIDI or other searches here */
2764
2765         return source;
2766 }
2767
2768 string
2769 Session::peak_path_from_audio_path (string audio_path) const
2770 {
2771         string res;
2772
2773         res = peak_dir ();
2774         res += PBD::basename_nosuffix (audio_path);
2775         res += ".peak";
2776
2777         return res;
2778 }
2779
2780 string
2781 Session::change_audio_path_by_name (string path, string oldname, string newname, bool destructive)
2782 {
2783         string look_for;
2784         string old_basename = PBD::basename_nosuffix (oldname);
2785         string new_legalized = legalize_for_path (newname);
2786
2787         /* note: we know (or assume) the old path is already valid */
2788
2789         if (destructive) {
2790
2791                 /* destructive file sources have a name of the form:
2792
2793                     /path/to/Tnnnn-NAME(%[LR])?.wav
2794
2795                     the task here is to replace NAME with the new name.
2796                 */
2797
2798                 /* find last slash */
2799
2800                 string dir;
2801                 string prefix;
2802                 string::size_type slash;
2803                 string::size_type dash;
2804
2805                 if ((slash = path.find_last_of ('/')) == string::npos) {
2806                         return "";
2807                 }
2808
2809                 dir = path.substr (0, slash+1);
2810
2811                 /* '-' is not a legal character for the NAME part of the path */
2812
2813                 if ((dash = path.find_last_of ('-')) == string::npos) {
2814                         return "";
2815                 }
2816
2817                 prefix = path.substr (slash+1, dash-(slash+1));
2818
2819                 path = dir;
2820                 path += prefix;
2821                 path += '-';
2822                 path += new_legalized;
2823                 path += ".wav";  /* XXX gag me with a spoon */
2824
2825         } else {
2826
2827                 /* non-destructive file sources have a name of the form:
2828
2829                     /path/to/NAME-nnnnn(%[LR])?.wav
2830
2831                     the task here is to replace NAME with the new name.
2832                 */
2833
2834                 string dir;
2835                 string suffix;
2836                 string::size_type slash;
2837                 string::size_type dash;
2838                 string::size_type postfix;
2839
2840                 /* find last slash */
2841
2842                 if ((slash = path.find_last_of ('/')) == string::npos) {
2843                         return "";
2844                 }
2845
2846                 dir = path.substr (0, slash+1);
2847
2848                 /* '-' is not a legal character for the NAME part of the path */
2849
2850                 if ((dash = path.find_last_of ('-')) == string::npos) {
2851                         return "";
2852                 }
2853
2854                 suffix = path.substr (dash+1);
2855
2856                 // Suffix is now everything after the dash. Now we need to eliminate
2857                 // the nnnnn part, which is done by either finding a '%' or a '.'
2858
2859                 postfix = suffix.find_last_of ("%");
2860                 if (postfix == string::npos) {
2861                         postfix = suffix.find_last_of ('.');
2862                 }
2863
2864                 if (postfix != string::npos) {
2865                         suffix = suffix.substr (postfix);
2866                 } else {
2867                         error << "Logic error in Session::change_audio_path_by_name(), please report to the developers" << endl;
2868                         return "";
2869                 }
2870
2871                 const uint32_t limit = 10000;
2872                 char buf[PATH_MAX+1];
2873
2874                 for (uint32_t cnt = 1; cnt <= limit; ++cnt) {
2875
2876                         snprintf (buf, sizeof(buf), "%s%s-%u%s", dir.c_str(), newname.c_str(), cnt, suffix.c_str());
2877
2878                         if (access (buf, F_OK) != 0) {
2879                                 path = buf;
2880                                 break;
2881                         }
2882                         path = "";
2883                 }
2884
2885                 if (path == "") {
2886                         error << "FATAL ERROR! Could not find a " << endl;
2887                 }
2888
2889         }
2890
2891         return path;
2892 }
2893
2894 string
2895 Session::audio_path_from_name (string name, uint32_t nchan, uint32_t chan, bool destructive)
2896 {
2897         string spath;
2898         uint32_t cnt;
2899         char buf[PATH_MAX+1];
2900         const uint32_t limit = 10000;
2901         string legalized;
2902
2903         buf[0] = '\0';
2904         legalized = legalize_for_path (name);
2905
2906         /* find a "version" of the file name that doesn't exist in
2907            any of the possible directories.
2908         */
2909
2910         for (cnt = (destructive ? ++destructive_index : 1); cnt <= limit; ++cnt) {
2911
2912                 vector<space_and_path>::iterator i;
2913                 uint32_t existing = 0;
2914
2915                 for (i = session_dirs.begin(); i != session_dirs.end(); ++i) {
2916
2917                         spath = (*i).path;
2918
2919                         spath += sound_dir (false);
2920
2921                         if (destructive) {
2922                                 if (nchan < 2) {
2923                                         snprintf (buf, sizeof(buf), "%s/T%04d-%s.wav", spath.c_str(), cnt, legalized.c_str());
2924                                 } else if (nchan == 2) {
2925                                         if (chan == 0) {
2926                                                 snprintf (buf, sizeof(buf), "%s/T%04d-%s%%L.wav", spath.c_str(), cnt, legalized.c_str());
2927                                         } else {
2928                                                 snprintf (buf, sizeof(buf), "%s/T%04d-%s%%R.wav", spath.c_str(), cnt, legalized.c_str());
2929                                         }
2930                                 } else if (nchan < 26) {
2931                                         snprintf (buf, sizeof(buf), "%s/T%04d-%s%%%c.wav", spath.c_str(), cnt, legalized.c_str(), 'a' + chan);
2932                                 } else {
2933                                         snprintf (buf, sizeof(buf), "%s/T%04d-%s.wav", spath.c_str(), cnt, legalized.c_str());
2934                                 }
2935
2936                         } else {
2937
2938                                 spath += '/';
2939                                 spath += legalized;
2940
2941                                 if (nchan < 2) {
2942                                         snprintf (buf, sizeof(buf), "%s-%u.wav", spath.c_str(), cnt);
2943                                 } else if (nchan == 2) {
2944                                         if (chan == 0) {
2945                                                 snprintf (buf, sizeof(buf), "%s-%u%%L.wav", spath.c_str(), cnt);
2946                                         } else {
2947                                                 snprintf (buf, sizeof(buf), "%s-%u%%R.wav", spath.c_str(), cnt);
2948                                         }
2949                                 } else if (nchan < 26) {
2950                                         snprintf (buf, sizeof(buf), "%s-%u%%%c.wav", spath.c_str(), cnt, 'a' + chan);
2951                                 } else {
2952                                         snprintf (buf, sizeof(buf), "%s-%u.wav", spath.c_str(), cnt);
2953                                 }
2954                         }
2955
2956                         if (g_file_test (buf, G_FILE_TEST_EXISTS)) {
2957                                 existing++;
2958                         }
2959
2960                 }
2961
2962                 if (existing == 0) {
2963                         break;
2964                 }
2965
2966                 if (cnt > limit) {
2967                         error << string_compose(_("There are already %1 recordings for %2, which I consider too many."), limit, name) << endmsg;
2968                         destroy ();
2969                         throw failed_constructor();
2970                 }
2971         }
2972
2973         /* we now have a unique name for the file, but figure out where to
2974            actually put it.
2975         */
2976
2977         string foo = buf;
2978
2979         spath = discover_best_sound_dir ();
2980         spath += '/';
2981
2982         string::size_type pos = foo.find_last_of ('/');
2983
2984         if (pos == string::npos) {
2985                 spath += foo;
2986         } else {
2987                 spath += foo.substr (pos + 1);
2988         }
2989
2990         return spath;
2991 }
2992
2993 boost::shared_ptr<AudioFileSource>
2994 Session::create_audio_source_for_session (AudioDiskstream& ds, uint32_t chan, bool destructive)
2995 {
2996         string spath = audio_path_from_name (ds.name(), ds.n_channels(), chan, destructive);
2997         return boost::dynamic_pointer_cast<AudioFileSource> (SourceFactory::createWritable (*this, spath, destructive, frame_rate()));
2998 }
2999
3000 /* Playlist management */
3001
3002 boost::shared_ptr<Playlist>
3003 Session::playlist_by_name (string name)
3004 {
3005         Glib::Mutex::Lock lm (playlist_lock);
3006         for (PlaylistList::iterator i = playlists.begin(); i != playlists.end(); ++i) {
3007                 if ((*i)->name() == name) {
3008                         return* i;
3009                 }
3010         }
3011         for (PlaylistList::iterator i = unused_playlists.begin(); i != unused_playlists.end(); ++i) {
3012                 if ((*i)->name() == name) {
3013                         return* i;
3014                 }
3015         }
3016
3017         return boost::shared_ptr<Playlist>();
3018 }
3019
3020 void
3021 Session::add_playlist (boost::shared_ptr<Playlist> playlist)
3022 {
3023         if (playlist->hidden()) {
3024                 return;
3025         }
3026
3027         {
3028                 Glib::Mutex::Lock lm (playlist_lock);
3029                 if (find (playlists.begin(), playlists.end(), playlist) == playlists.end()) {
3030                         playlists.insert (playlists.begin(), playlist);
3031                         playlist->InUse.connect (sigc::bind (mem_fun (*this, &Session::track_playlist), boost::weak_ptr<Playlist>(playlist)));
3032                         playlist->GoingAway.connect (sigc::bind (mem_fun (*this, &Session::remove_playlist), boost::weak_ptr<Playlist>(playlist)));
3033                 }
3034         }
3035
3036         set_dirty();
3037
3038         PlaylistAdded (playlist); /* EMIT SIGNAL */
3039 }
3040
3041 void
3042 Session::get_playlists (vector<boost::shared_ptr<Playlist> >& s)
3043 {
3044         {
3045                 Glib::Mutex::Lock lm (playlist_lock);
3046                 for (PlaylistList::iterator i = playlists.begin(); i != playlists.end(); ++i) {
3047                         s.push_back (*i);
3048                 }
3049                 for (PlaylistList::iterator i = unused_playlists.begin(); i != unused_playlists.end(); ++i) {
3050                         s.push_back (*i);
3051                 }
3052         }
3053 }
3054
3055 void
3056 Session::track_playlist (bool inuse, boost::weak_ptr<Playlist> wpl)
3057 {
3058         boost::shared_ptr<Playlist> pl(wpl.lock());
3059
3060         if (!pl) {
3061                 return;
3062         }
3063
3064         PlaylistList::iterator x;
3065
3066         if (pl->hidden()) {
3067                 /* its not supposed to be visible */
3068                 return;
3069         }
3070
3071         {
3072                 Glib::Mutex::Lock lm (playlist_lock);
3073
3074                 if (!inuse) {
3075
3076                         unused_playlists.insert (pl);
3077
3078                         if ((x = playlists.find (pl)) != playlists.end()) {
3079                                 playlists.erase (x);
3080                         }
3081
3082
3083                 } else {
3084
3085                         playlists.insert (pl);
3086
3087                         if ((x = unused_playlists.find (pl)) != unused_playlists.end()) {
3088                                 unused_playlists.erase (x);
3089                         }
3090                 }
3091         }
3092 }
3093
3094 void
3095 Session::remove_playlist (boost::weak_ptr<Playlist> weak_playlist)
3096 {
3097         if (_state_of_the_state & Deletion) {
3098                 return;
3099         }
3100
3101         boost::shared_ptr<Playlist> playlist (weak_playlist.lock());
3102
3103         if (!playlist) {
3104                 return;
3105         }
3106
3107         {
3108                 Glib::Mutex::Lock lm (playlist_lock);
3109
3110                 PlaylistList::iterator i;
3111
3112                 i = find (playlists.begin(), playlists.end(), playlist);
3113                 if (i != playlists.end()) {
3114                         playlists.erase (i);
3115                 }
3116
3117                 i = find (unused_playlists.begin(), unused_playlists.end(), playlist);
3118                 if (i != unused_playlists.end()) {
3119                         unused_playlists.erase (i);
3120                 }
3121
3122         }
3123
3124         set_dirty();
3125
3126         PlaylistRemoved (playlist); /* EMIT SIGNAL */
3127 }
3128
3129 void
3130 Session::set_audition (boost::shared_ptr<Region> r)
3131 {
3132         pending_audition_region = r;
3133         post_transport_work = PostTransportWork (post_transport_work | PostTransportAudition);
3134         schedule_butler_transport_work ();
3135 }
3136
3137 void
3138 Session::audition_playlist ()
3139 {
3140         Event* ev = new Event (Event::Audition, Event::Add, Event::Immediate, 0, 0.0);
3141         ev->region.reset ();
3142         queue_event (ev);
3143 }
3144
3145 void
3146 Session::non_realtime_set_audition ()
3147 {
3148         if (!pending_audition_region) {
3149                 auditioner->audition_current_playlist ();
3150         } else {
3151                 auditioner->audition_region (pending_audition_region);
3152                 pending_audition_region.reset ();
3153         }
3154         AuditionActive (true); /* EMIT SIGNAL */
3155 }
3156
3157 void
3158 Session::audition_region (boost::shared_ptr<Region> r)
3159 {
3160         Event* ev = new Event (Event::Audition, Event::Add, Event::Immediate, 0, 0.0);
3161         ev->region = r;
3162         queue_event (ev);
3163 }
3164
3165 void
3166 Session::cancel_audition ()
3167 {
3168         if (auditioner->active()) {
3169                 auditioner->cancel_audition ();
3170                 AuditionActive (false); /* EMIT SIGNAL */
3171         }
3172 }
3173
3174 bool
3175 Session::RoutePublicOrderSorter::operator() (boost::shared_ptr<Route> a, boost::shared_ptr<Route> b)
3176 {
3177         return a->order_key(N_("signal")) < b->order_key(N_("signal"));
3178 }
3179
3180 void
3181 Session::remove_empty_sounds ()
3182 {
3183         PathScanner scanner;
3184
3185         vector<string *>* possible_audiofiles = scanner (sound_dir(), "\\.(wav|aiff|caf|w64)$", false, true);
3186
3187         Glib::Mutex::Lock lm (audio_source_lock);
3188
3189         regex_t compiled_tape_track_pattern;
3190         int err;
3191
3192         if ((err = regcomp (&compiled_tape_track_pattern, "/T[0-9][0-9][0-9][0-9]-", REG_EXTENDED|REG_NOSUB))) {
3193
3194                 char msg[256];
3195
3196                 regerror (err, &compiled_tape_track_pattern, msg, sizeof (msg));
3197
3198                 error << string_compose (_("Cannot compile tape track regexp for use (%1)"), msg) << endmsg;
3199                 return;
3200         }
3201
3202         for (vector<string *>::iterator i = possible_audiofiles->begin(); i != possible_audiofiles->end(); ++i) {
3203
3204                 /* never remove files that appear to be a tape track */
3205
3206                 if (regexec (&compiled_tape_track_pattern, (*i)->c_str(), 0, 0, 0) == 0) {
3207                         delete *i;
3208                         continue;
3209                 }
3210
3211                 if (AudioFileSource::is_empty (*this, *(*i))) {
3212
3213                         unlink ((*i)->c_str());
3214
3215                         string peak_path = peak_path_from_audio_path (**i);
3216                         unlink (peak_path.c_str());
3217                 }
3218
3219                 delete* i;
3220         }
3221
3222         delete possible_audiofiles;
3223 }
3224
3225 bool
3226 Session::is_auditioning () const
3227 {
3228         /* can be called before we have an auditioner object */
3229         if (auditioner) {
3230                 return auditioner->active();
3231         } else {
3232                 return false;
3233         }
3234 }
3235
3236 void
3237 Session::set_all_solo (bool yn)
3238 {
3239         shared_ptr<RouteList> r = routes.reader ();
3240
3241         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
3242                 if (!(*i)->hidden()) {
3243                         (*i)->set_solo (yn, this);
3244                 }
3245         }
3246
3247         set_dirty();
3248 }
3249
3250 void
3251 Session::set_all_mute (bool yn)
3252 {
3253         shared_ptr<RouteList> r = routes.reader ();
3254
3255         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
3256                 if (!(*i)->hidden()) {
3257                         (*i)->set_mute (yn, this);
3258                 }
3259         }
3260
3261         set_dirty();
3262 }
3263
3264 uint32_t
3265 Session::n_diskstreams () const
3266 {
3267         uint32_t n = 0;
3268
3269         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
3270
3271         for (DiskstreamList::const_iterator i = dsl->begin(); i != dsl->end(); ++i) {
3272                 if (!(*i)->hidden()) {
3273                         n++;
3274                 }
3275         }
3276         return n;
3277 }
3278
3279 void
3280 Session::graph_reordered ()
3281 {
3282         /* don't do this stuff if we are setting up connections
3283            from a set_state() call.
3284         */
3285
3286         if (_state_of_the_state & InitialConnecting) {
3287                 return;
3288         }
3289
3290         /* every track/bus asked for this to be handled but it was deferred because
3291            we were connecting. do it now.
3292         */
3293
3294         request_input_change_handling ();
3295
3296         resort_routes ();
3297
3298         /* force all diskstreams to update their capture offset values to
3299            reflect any changes in latencies within the graph.
3300         */
3301
3302         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
3303
3304         for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
3305                 (*i)->set_capture_offset ();
3306         }
3307 }
3308
3309 void
3310 Session::record_disenable_all ()
3311 {
3312         record_enable_change_all (false);
3313 }
3314
3315 void
3316 Session::record_enable_all ()
3317 {
3318         record_enable_change_all (true);
3319 }
3320
3321 void
3322 Session::record_enable_change_all (bool yn)
3323 {
3324         shared_ptr<RouteList> r = routes.reader ();
3325
3326         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
3327                 AudioTrack* at;
3328
3329                 if ((at = dynamic_cast<AudioTrack*>((*i).get())) != 0) {
3330                         at->set_record_enable (yn, this);
3331                 }
3332         }
3333
3334         /* since we don't keep rec-enable state, don't mark session dirty */
3335 }
3336
3337 void
3338 Session::add_redirect (Redirect* redirect)
3339 {
3340         Send* send;
3341         Insert* insert;
3342         PortInsert* port_insert;
3343         PluginInsert* plugin_insert;
3344
3345         if ((insert = dynamic_cast<Insert *> (redirect)) != 0) {
3346                 if ((port_insert = dynamic_cast<PortInsert *> (insert)) != 0) {
3347                         _port_inserts.insert (_port_inserts.begin(), port_insert);
3348                 } else if ((plugin_insert = dynamic_cast<PluginInsert *> (insert)) != 0) {
3349                         _plugin_inserts.insert (_plugin_inserts.begin(), plugin_insert);
3350                 } else {
3351                         fatal << _("programming error: unknown type of Insert created!") << endmsg;
3352                         /*NOTREACHED*/
3353                 }
3354         } else if ((send = dynamic_cast<Send *> (redirect)) != 0) {
3355                 _sends.insert (_sends.begin(), send);
3356         } else {
3357                 fatal << _("programming error: unknown type of Redirect created!") << endmsg;
3358                 /*NOTREACHED*/
3359         }
3360
3361         redirect->GoingAway.connect (sigc::bind (mem_fun (*this, &Session::remove_redirect), redirect));
3362
3363         set_dirty();
3364 }
3365
3366 void
3367 Session::remove_redirect (Redirect* redirect)
3368 {
3369         Send* send;
3370         Insert* insert;
3371         PortInsert* port_insert;
3372         PluginInsert* plugin_insert;
3373
3374         if ((insert = dynamic_cast<Insert *> (redirect)) != 0) {
3375                 if ((port_insert = dynamic_cast<PortInsert *> (insert)) != 0) {
3376                         list<PortInsert*>::iterator x = find (_port_inserts.begin(), _port_inserts.end(), port_insert);
3377                         if (x != _port_inserts.end()) {
3378                                 insert_bitset[port_insert->bit_slot()] = false;
3379                                 _port_inserts.erase (x);
3380                         }
3381                 } else if ((plugin_insert = dynamic_cast<PluginInsert *> (insert)) != 0) {
3382                         _plugin_inserts.remove (plugin_insert);
3383                 } else {
3384                         fatal << string_compose (_("programming error: %1"),
3385                                                  X_("unknown type of Insert deleted!"))
3386                               << endmsg;
3387                         /*NOTREACHED*/
3388                 }
3389         } else if ((send = dynamic_cast<Send *> (redirect)) != 0) {
3390                 list<Send*>::iterator x = find (_sends.begin(), _sends.end(), send);
3391                 if (x != _sends.end()) {
3392                         send_bitset[send->bit_slot()] = false;
3393                         _sends.erase (x);
3394                 }
3395         } else {
3396                 fatal << _("programming error: unknown type of Redirect deleted!") << endmsg;
3397                 /*NOTREACHED*/
3398         }
3399
3400         set_dirty();
3401 }
3402
3403 nframes_t
3404 Session::available_capture_duration ()
3405 {
3406         float sample_bytes_on_disk = 4.0; // keep gcc happy
3407
3408         switch (Config->get_native_file_data_format()) {
3409         case FormatFloat:
3410                 sample_bytes_on_disk = 4;
3411                 break;
3412
3413         case FormatInt24:
3414                 sample_bytes_on_disk = 3;
3415                 break;
3416
3417         default:
3418                 /* impossible, but keep some gcc versions happy */
3419                 fatal << string_compose (_("programming error: %1"),
3420                                          X_("illegal native file data format"))
3421                       << endmsg;
3422                 /*NOTREACHED*/
3423         }
3424
3425         double scale = 4096.0 / sample_bytes_on_disk;
3426
3427         if (_total_free_4k_blocks * scale > (double) max_frames) {
3428                 return max_frames;
3429         }
3430
3431         return (nframes_t) floor (_total_free_4k_blocks * scale);
3432 }
3433
3434 void
3435 Session::add_connection (ARDOUR::Connection* connection)
3436 {
3437         {
3438                 Glib::Mutex::Lock guard (connection_lock);
3439                 _connections.push_back (connection);
3440         }
3441
3442         ConnectionAdded (connection); /* EMIT SIGNAL */
3443
3444         set_dirty();
3445 }
3446
3447 void
3448 Session::remove_connection (ARDOUR::Connection* connection)
3449 {
3450         bool removed = false;
3451
3452         {
3453                 Glib::Mutex::Lock guard (connection_lock);
3454                 ConnectionList::iterator i = find (_connections.begin(), _connections.end(), connection);
3455
3456                 if (i != _connections.end()) {
3457                         _connections.erase (i);
3458                         removed = true;
3459                 }
3460         }
3461
3462         if (removed) {
3463                  ConnectionRemoved (connection); /* EMIT SIGNAL */
3464         }
3465
3466         set_dirty();
3467 }
3468
3469 ARDOUR::Connection *
3470 Session::connection_by_name (string name) const
3471 {
3472         Glib::Mutex::Lock lm (connection_lock);
3473
3474         for (ConnectionList::const_iterator i = _connections.begin(); i != _connections.end(); ++i) {
3475                 if ((*i)->name() == name) {
3476                         return* i;
3477                 }
3478         }
3479
3480         return 0;
3481 }
3482
3483 void
3484 Session::tempo_map_changed (Change ignored)
3485 {
3486         clear_clicks ();
3487         set_dirty ();
3488 }
3489
3490 void
3491 Session::ensure_passthru_buffers (uint32_t howmany)
3492 {
3493         while (howmany > _passthru_buffers.size()) {
3494                 Sample *p;
3495 #ifdef NO_POSIX_MEMALIGN
3496                 p =  (Sample *) malloc(current_block_size * sizeof(Sample));
3497 #else
3498                 posix_memalign((void **)&p,16,current_block_size * 4);
3499 #endif
3500                 _passthru_buffers.push_back (p);
3501
3502                 *p = 0;
3503
3504 #ifdef NO_POSIX_MEMALIGN
3505                 p =  (Sample *) malloc(current_block_size * sizeof(Sample));
3506 #else
3507                 posix_memalign((void **)&p,16,current_block_size * 4);
3508 #endif
3509                 memset (p, 0, sizeof (Sample) * current_block_size);
3510                 _silent_buffers.push_back (p);
3511
3512                 *p = 0;
3513
3514 #ifdef NO_POSIX_MEMALIGN
3515                 p =  (Sample *) malloc(current_block_size * sizeof(Sample));
3516 #else
3517                 posix_memalign((void **)&p,16,current_block_size * 4);
3518 #endif
3519                 memset (p, 0, sizeof (Sample) * current_block_size);
3520                 _send_buffers.push_back (p);
3521
3522         }
3523         allocate_pan_automation_buffers (current_block_size, howmany, false);
3524 }
3525
3526 uint32_t
3527 Session::next_insert_id ()
3528 {
3529         /* this doesn't really loop forever. just think about it */
3530
3531         while (true) {
3532                 for (boost::dynamic_bitset<uint32_t>::size_type n = 0; n < insert_bitset.size(); ++n) {
3533                         if (!insert_bitset[n]) {
3534                                 insert_bitset[n] = true;
3535                                 cerr << "Returning " << n << " as insert ID\n";
3536                                 return n;
3537
3538                         }
3539                 }
3540
3541                 /* none available, so resize and try again */
3542
3543                 insert_bitset.resize (insert_bitset.size() + 16, false);
3544         }
3545 }
3546
3547 uint32_t
3548 Session::next_send_id ()
3549 {
3550         /* this doesn't really loop forever. just think about it */
3551
3552         while (true) {
3553                 for (boost::dynamic_bitset<uint32_t>::size_type n = 0; n < send_bitset.size(); ++n) {
3554                         if (!send_bitset[n]) {
3555                                 send_bitset[n] = true;
3556                                 cerr << "Returning " << n << " as send ID\n";
3557                                 return n;
3558
3559                         }
3560                 }
3561
3562                 /* none available, so resize and try again */
3563
3564                 send_bitset.resize (send_bitset.size() + 16, false);
3565         }
3566 }
3567
3568 void
3569 Session::mark_send_id (uint32_t id)
3570 {
3571         if (id >= send_bitset.size()) {
3572                 send_bitset.resize (id+16, false);
3573         }
3574         if (send_bitset[id]) {
3575                 warning << string_compose (_("send ID %1 appears to be in use already"), id) << endmsg;
3576         }
3577         send_bitset[id] = true;
3578 }
3579
3580 void
3581 Session::mark_insert_id (uint32_t id)
3582 {
3583         if (id >= insert_bitset.size()) {
3584                 insert_bitset.resize (id+16, false);
3585         }
3586         if (insert_bitset[id]) {
3587                 warning << string_compose (_("insert ID %1 appears to be in use already"), id) << endmsg;
3588         }
3589         insert_bitset[id] = true;
3590 }
3591
3592 /* Named Selection management */
3593
3594 NamedSelection *
3595 Session::named_selection_by_name (string name)
3596 {
3597         Glib::Mutex::Lock lm (named_selection_lock);
3598         for (NamedSelectionList::iterator i = named_selections.begin(); i != named_selections.end(); ++i) {
3599                 if ((*i)->name == name) {
3600                         return* i;
3601                 }
3602         }
3603         return 0;
3604 }
3605
3606 void
3607 Session::add_named_selection (NamedSelection* named_selection)
3608 {
3609         {
3610                 Glib::Mutex::Lock lm (named_selection_lock);
3611                 named_selections.insert (named_selections.begin(), named_selection);
3612         }
3613
3614         for (list<boost::shared_ptr<Playlist> >::iterator i = named_selection->playlists.begin(); i != named_selection->playlists.end(); ++i) {
3615                 add_playlist (*i);
3616         }
3617
3618         set_dirty();
3619
3620         NamedSelectionAdded (); /* EMIT SIGNAL */
3621 }
3622
3623 void
3624 Session::remove_named_selection (NamedSelection* named_selection)
3625 {
3626         bool removed = false;
3627
3628         {
3629                 Glib::Mutex::Lock lm (named_selection_lock);
3630
3631                 NamedSelectionList::iterator i = find (named_selections.begin(), named_selections.end(), named_selection);
3632
3633                 if (i != named_selections.end()) {
3634                         delete (*i);
3635                         named_selections.erase (i);
3636                         set_dirty();
3637                         removed = true;
3638                 }
3639         }
3640
3641         if (removed) {
3642                  NamedSelectionRemoved (); /* EMIT SIGNAL */
3643         }
3644 }
3645
3646 void
3647 Session::reset_native_file_format ()
3648 {
3649         boost::shared_ptr<DiskstreamList> dsl = diskstreams.reader();
3650
3651         for (DiskstreamList::iterator i = dsl->begin(); i != dsl->end(); ++i) {
3652                 (*i)->reset_write_sources (false);
3653         }
3654 }
3655
3656 bool
3657 Session::route_name_unique (string n) const
3658 {
3659         shared_ptr<RouteList> r = routes.reader ();
3660
3661         for (RouteList::const_iterator i = r->begin(); i != r->end(); ++i) {
3662                 if ((*i)->name() == n) {
3663                         return false;
3664                 }
3665         }
3666
3667         return true;
3668 }
3669
3670 uint32_t
3671 Session::n_playlists () const
3672 {
3673         Glib::Mutex::Lock lm (playlist_lock);
3674         return playlists.size();
3675 }
3676
3677 void
3678 Session::allocate_pan_automation_buffers (nframes_t nframes, uint32_t howmany, bool force)
3679 {
3680         if (!force && howmany <= _npan_buffers) {
3681                 return;
3682         }
3683
3684         if (_pan_automation_buffer) {
3685
3686                 for (uint32_t i = 0; i < _npan_buffers; ++i) {
3687                         delete [] _pan_automation_buffer[i];
3688                 }
3689
3690                 delete [] _pan_automation_buffer;
3691         }
3692
3693         _pan_automation_buffer = new pan_t*[howmany];
3694
3695         for (uint32_t i = 0; i < howmany; ++i) {
3696                 _pan_automation_buffer[i] = new pan_t[nframes];
3697         }
3698
3699         _npan_buffers = howmany;
3700 }
3701
3702 int
3703 Session::freeze (InterThreadInfo& itt)
3704 {
3705         shared_ptr<RouteList> r = routes.reader ();
3706
3707         for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
3708
3709                 AudioTrack *at;
3710
3711                 if ((at = dynamic_cast<AudioTrack*>((*i).get())) != 0) {
3712                         /* XXX this is wrong because itt.progress will keep returning to zero at the start
3713                            of every track.
3714                         */
3715                         at->freeze (itt);
3716                 }
3717         }
3718
3719         return 0;
3720 }
3721
3722 int
3723 Session::write_one_audio_track (AudioTrack& track, nframes_t start, nframes_t len,
3724                                bool overwrite, vector<boost::shared_ptr<AudioSource> >& srcs, InterThreadInfo& itt)
3725 {
3726         int ret = -1;
3727         boost::shared_ptr<Playlist> playlist;
3728         boost::shared_ptr<AudioFileSource> fsource;
3729         uint32_t x;
3730         char buf[PATH_MAX+1];
3731         string dir;
3732         uint32_t nchans;
3733         nframes_t position;
3734         nframes_t this_chunk;
3735         nframes_t to_do;
3736         vector<Sample*> buffers;
3737
3738         // any bigger than this seems to cause stack overflows in called functions
3739         const nframes_t chunk_size = (128 * 1024)/4;
3740
3741         g_atomic_int_set (&processing_prohibited, 1);
3742
3743         /* call tree *MUST* hold route_lock */
3744
3745         if ((playlist = track.diskstream()->playlist()) == 0) {
3746                 goto out;
3747         }
3748
3749         /* external redirects will be a problem */
3750
3751         if (track.has_external_redirects()) {
3752                 goto out;
3753         }
3754
3755         nchans = track.audio_diskstream()->n_channels();
3756
3757         dir = discover_best_sound_dir ();
3758
3759         for (uint32_t chan_n=0; chan_n < nchans; ++chan_n) {
3760
3761                 for (x = 0; x < 99999; ++x) {
3762                         snprintf (buf, sizeof(buf), "%s/%s-%d-bounce-%" PRIu32 ".wav", dir.c_str(), playlist->name().c_str(), chan_n, x+1);
3763                         if (access (buf, F_OK) != 0) {
3764                                 break;
3765                         }
3766                 }
3767
3768                 if (x == 99999) {
3769                         error << string_compose (_("too many bounced versions of playlist \"%1\""), playlist->name()) << endmsg;
3770                         goto out;
3771                 }
3772
3773                 try {
3774                         fsource = boost::dynamic_pointer_cast<AudioFileSource> (SourceFactory::createWritable (*this, buf, false, frame_rate()));
3775                 }
3776
3777                 catch (failed_constructor& err) {
3778                         error << string_compose (_("cannot create new audio file \"%1\" for %2"), buf, track.name()) << endmsg;
3779                         goto out;
3780                 }
3781
3782                 srcs.push_back (fsource);
3783         }
3784
3785         /* XXX need to flush all redirects */
3786
3787         position = start;
3788         to_do = len;
3789
3790         /* create a set of reasonably-sized buffers */
3791
3792         for (vector<Sample*>::iterator i = _passthru_buffers.begin(); i != _passthru_buffers.end(); ++i) {
3793                 Sample* b;
3794 #ifdef NO_POSIX_MEMALIGN
3795                 b =  (Sample *) malloc(chunk_size * sizeof(Sample));
3796 #else
3797                 posix_memalign((void **)&b,16,chunk_size * 4);
3798 #endif
3799                 buffers.push_back (b);
3800         }
3801
3802         while (to_do && !itt.cancel) {
3803
3804                 this_chunk = min (to_do, chunk_size);
3805
3806                 if (track.export_stuff (buffers, nchans, start, this_chunk)) {
3807                         goto out;
3808                 }
3809
3810                 uint32_t n = 0;
3811                 for (vector<boost::shared_ptr<AudioSource> >::iterator src=srcs.begin(); src != srcs.end(); ++src, ++n) {
3812                         boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*src);
3813
3814                         if (afs) {
3815                                 if (afs->write (buffers[n], this_chunk) != this_chunk) {
3816                                         goto out;
3817                                 }
3818                         }
3819                 }
3820
3821                 start += this_chunk;
3822                 to_do -= this_chunk;
3823
3824                 itt.progress = (float) (1.0 - ((double) to_do / len));
3825
3826         }
3827
3828         if (!itt.cancel) {
3829
3830                 time_t now;
3831                 struct tm* xnow;
3832                 time (&now);
3833                 xnow = localtime (&now);
3834
3835                 for (vector<boost::shared_ptr<AudioSource> >::iterator src=srcs.begin(); src != srcs.end(); ++src) {
3836                         boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*src);
3837
3838                         if (afs) {
3839                                 afs->update_header (position, *xnow, now);
3840                         }
3841                 }
3842
3843                 /* build peakfile for new source */
3844
3845                 for (vector<boost::shared_ptr<AudioSource> >::iterator src=srcs.begin(); src != srcs.end(); ++src) {
3846                         boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*src);
3847                         if (afs) {
3848                                 afs->build_peaks ();
3849                         }
3850                 }
3851
3852                 /* construct a region to represent the bounced material */
3853
3854                 boost::shared_ptr<Region> aregion = RegionFactory::create (srcs, 0, srcs.front()->length(),
3855                                                                            region_name_from_path (srcs.front()->name(), true));
3856
3857                 ret = 0;
3858         }
3859
3860   out:
3861         if (ret) {
3862                 for (vector<boost::shared_ptr<AudioSource> >::iterator src = srcs.begin(); src != srcs.end(); ++src) {
3863                         boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(*src);
3864
3865                         if (afs) {
3866                                 afs->mark_for_remove ();
3867                         }
3868
3869                         (*src)->drop_references ();
3870                 }
3871         }
3872
3873         for (vector<Sample*>::iterator i = buffers.begin(); i != buffers.end(); ++i) {
3874                 free(*i);
3875         }
3876
3877         g_atomic_int_set (&processing_prohibited, 0);
3878
3879         itt.done = true;
3880
3881         return ret;
3882 }
3883
3884 vector<Sample*>&
3885 Session::get_silent_buffers (uint32_t howmany)
3886 {
3887         for (uint32_t i = 0; i < howmany; ++i) {
3888                 memset (_silent_buffers[i], 0, sizeof (Sample) * current_block_size);
3889         }
3890         return _silent_buffers;
3891 }
3892
3893 uint32_t
3894 Session::ntracks () const
3895 {
3896         uint32_t n = 0;
3897         shared_ptr<RouteList> r = routes.reader ();
3898
3899         for (RouteList::const_iterator i = r->begin(); i != r->end(); ++i) {
3900                 if (dynamic_cast<AudioTrack*> ((*i).get())) {
3901                         ++n;
3902                 }
3903         }
3904
3905         return n;
3906 }
3907
3908 uint32_t
3909 Session::nbusses () const
3910 {
3911         uint32_t n = 0;
3912         shared_ptr<RouteList> r = routes.reader ();
3913
3914         for (RouteList::const_iterator i = r->begin(); i != r->end(); ++i) {
3915                 if (dynamic_cast<AudioTrack*> ((*i).get()) == 0) {
3916                         ++n;
3917                 }
3918         }
3919
3920         return n;
3921 }
3922
3923 void
3924 Session::add_automation_list(AutomationList *al)
3925 {
3926         automation_lists[al->id()] = al;
3927 }
3928
3929 nframes_t
3930 Session::compute_initial_length ()
3931 {
3932         return _engine.frame_rate() * 60 * 5;
3933 }
3934