libs/ardour/playlist.cc

   1 /*
   2     Copyright (C) 2000-2003 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <stdint.h>
  21 #include <set>
  22 #include <algorithm>
  23 #include <string>
  24
  25 #include <boost/lexical_cast.hpp>
  26
  27 #include "pbd/convert.h"
  28 #include "pbd/stateful_diff_command.h"
  29 #include "pbd/xml++.h"
  30
  31 #include "ardour/debug.h"
  32 #include "ardour/playlist.h"
  33 #include "ardour/session.h"
  34 #include "ardour/region.h"
  35 #include "ardour/region_factory.h"
  36 #include "ardour/region_sorters.h"
  37 #include "ardour/playlist_factory.h"
  38 #include "ardour/playlist_source.h"
  39 #include "ardour/transient_detector.h"
  40 #include "ardour/session_playlists.h"
  41 #include "ardour/source_factory.h"
  42
  43 #include "i18n.h"
  44
  45 using namespace std;
  46 using namespace ARDOUR;
  47 using namespace PBD;
  48
  49 namespace ARDOUR {
  50         namespace Properties {
  51                 PBD::PropertyDescriptor<bool> regions;
  52         }
  53 }
  54
  55 struct ShowMeTheList {
  56     ShowMeTheList (boost::shared_ptr<Playlist> pl, const string& n) : playlist (pl), name (n) {}
  57     ~ShowMeTheList () {
  58             cerr << ">>>>" << name << endl; playlist->dump(); cerr << "<<<<" << name << endl << endl;
  59     };
  60     boost::shared_ptr<Playlist> playlist;
  61     string name;
  62 };
  63
  64
  65
  66 void
  67 Playlist::make_property_quarks ()
  68 {
  69         Properties::regions.property_id = g_quark_from_static_string (X_("regions"));
  70         DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for regions = %1\n",
  71                                                         Properties::regions.property_id));
  72 }
  73
  74 RegionListProperty::RegionListProperty (Playlist& pl)
  75         : SequenceProperty<std::list<boost::shared_ptr<Region> > > (Properties::regions.property_id, boost::bind (&Playlist::update, &pl, _1))
  76         , _playlist (pl)
  77 {
  78
  79 }
  80
  81 RegionListProperty::RegionListProperty (RegionListProperty const & p)
  82         : PBD::SequenceProperty<std::list<boost::shared_ptr<Region> > > (p)
  83         , _playlist (p._playlist)
  84 {
  85
  86 }
  87
  88 RegionListProperty *
  89 RegionListProperty::clone () const
  90 {
  91         return new RegionListProperty (*this);
  92 }
  93
  94 RegionListProperty *
  95 RegionListProperty::create () const
  96 {
  97         return new RegionListProperty (_playlist);
  98 }
  99
 100 void
 101 RegionListProperty::get_content_as_xml (boost::shared_ptr<Region> region, XMLNode & node) const
 102 {
 103         /* All regions (even those which are deleted) have their state saved by other
 104            code, so we can just store ID here.
 105         */
 106
 107         node.add_property ("id", region->id().to_s ());
 108 }
 109
 110 boost::shared_ptr<Region>
 111 RegionListProperty::get_content_from_xml (XMLNode const & node) const
 112 {
 113         XMLProperty const * prop = node.property ("id");
 114         assert (prop);
 115
 116         PBD::ID id (prop->value ());
 117
 118         boost::shared_ptr<Region> ret = _playlist.region_by_id (id);
 119
 120         if (!ret) {
 121                 ret = RegionFactory::region_by_id (id);
 122         }
 123
 124         return ret;
 125 }
 126
 127 Playlist::Playlist (Session& sess, string nom, DataType type, bool hide)
 128         : SessionObject(sess, nom)
 129         , regions (*this)
 130         , _type(type)
 131 {
 132         init (hide);
 133         first_set_state = false;
 134         _name = nom;
 135         _set_sort_id ();
 136 }
 137
 138 Playlist::Playlist (Session& sess, const XMLNode& node, DataType type, bool hide)
 139         : SessionObject(sess, "unnamed playlist")
 140         , regions (*this)
 141         , _type(type)
 142 {
 143 #ifndef NDEBUG
 144         const XMLProperty* prop = node.property("type");
 145         assert(!prop || DataType(prop->value()) == _type);
 146 #endif
 147
 148         init (hide);
 149         _name = "unnamed"; /* reset by set_state */
 150         _set_sort_id ();
 151
 152         /* set state called by derived class */
 153 }
 154
 155 Playlist::Playlist (boost::shared_ptr<const Playlist> other, string namestr, bool hide)
 156         : SessionObject(other->_session, namestr)
 157         , regions (*this)
 158         , _type(other->_type)
 159         , _orig_track_id (other->_orig_track_id)
 160 {
 161         init (hide);
 162
 163         RegionList tmp;
 164         other->copy_regions (tmp);
 165
 166         in_set_state++;
 167
 168         for (list<boost::shared_ptr<Region> >::iterator x = tmp.begin(); x != tmp.end(); ++x) {
 169                 add_region_internal( (*x), (*x)->position());
 170         }
 171
 172         in_set_state--;
 173
 174         _splicing  = other->_splicing;
 175         _rippling  = other->_rippling;
 176         _nudging   = other->_nudging;
 177         _edit_mode = other->_edit_mode;
 178
 179         in_set_state = 0;
 180         first_set_state = false;
 181         in_flush = false;
 182         in_partition = false;
 183         subcnt = 0;
 184         _frozen = other->_frozen;
 185 }
 186
 187 Playlist::Playlist (boost::shared_ptr<const Playlist> other, framepos_t start, framecnt_t cnt, string str, bool hide)
 188         : SessionObject(other->_session, str)
 189         , regions (*this)
 190         , _type(other->_type)
 191         , _orig_track_id (other->_orig_track_id)
 192 {
 193         RegionReadLock rlock2 (const_cast<Playlist*> (other.get()));
 194
 195         framepos_t end = start + cnt - 1;
 196
 197         init (hide);
 198
 199         in_set_state++;
 200
 201         for (RegionList::const_iterator i = other->regions.begin(); i != other->regions.end(); ++i) {
 202
 203                 boost::shared_ptr<Region> region;
 204                 boost::shared_ptr<Region> new_region;
 205                 frameoffset_t offset = 0;
 206                 framepos_t position = 0;
 207                 framecnt_t len = 0;
 208                 string    new_name;
 209                 Evoral::OverlapType overlap;
 210
 211                 region = *i;
 212
 213                 overlap = region->coverage (start, end);
 214
 215                 switch (overlap) {
 216                 case Evoral::OverlapNone:
 217                         continue;
 218
 219                 case Evoral::OverlapInternal:
 220                         offset = start - region->position();
 221                         position = 0;
 222                         len = cnt;
 223                         break;
 224
 225                 case Evoral::OverlapStart:
 226                         offset = 0;
 227                         position = region->position() - start;
 228                         len = end - region->position();
 229                         break;
 230
 231                 case Evoral::OverlapEnd:
 232                         offset = start - region->position();
 233                         position = 0;
 234                         len = region->length() - offset;
 235                         break;
 236
 237                 case Evoral::OverlapExternal:
 238                         offset = 0;
 239                         position = region->position() - start;
 240                         len = region->length();
 241                         break;
 242                 }
 243
 244                 RegionFactory::region_name (new_name, region->name(), false);
 245
 246                 PropertyList plist;
 247
 248                 plist.add (Properties::start, region->start() + offset);
 249                 plist.add (Properties::length, len);
 250                 plist.add (Properties::name, new_name);
 251                 plist.add (Properties::layer, region->layer());
 252                 plist.add (Properties::layering_index, region->layering_index());
 253
 254                 new_region = RegionFactory::create (region, plist);
 255
 256                 add_region_internal (new_region, position);
 257         }
 258
 259         //keep track of any dead space at end (for pasting into Ripple or Splice mode)
 260         //at the end of construction, any length of cnt beyond the extents of the regions is end_space
 261         _end_space = cnt - (get_extent().second - get_extent().first);
 262
 263         in_set_state--;
 264         first_set_state = false;
 265 }
 266
 267 void
 268 Playlist::use ()
 269 {
 270         ++_refcnt;
 271         InUse (true); /* EMIT SIGNAL */
 272 }
 273
 274 void
 275 Playlist::release ()
 276 {
 277         if (_refcnt > 0) {
 278                 _refcnt--;
 279         }
 280
 281         if (_refcnt == 0) {
 282                 InUse (false); /* EMIT SIGNAL */
 283         }
 284 }
 285
 286 void
 287 Playlist::copy_regions (RegionList& newlist) const
 288 {
 289         RegionReadLock rlock (const_cast<Playlist *> (this));
 290
 291         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
 292                 newlist.push_back (RegionFactory::create (*i, true));
 293         }
 294 }
 295
 296 void
 297 Playlist::init (bool hide)
 298 {
 299         add_property (regions);
 300         _xml_node_name = X_("Playlist");
 301
 302         g_atomic_int_set (&block_notifications, 0);
 303         g_atomic_int_set (&ignore_state_changes, 0);
 304         pending_contents_change = false;
 305         pending_layering = false;
 306         first_set_state = true;
 307         _refcnt = 0;
 308         _hidden = hide;
 309         _splicing = false;
 310         _rippling = false;
 311         _shuffling = false;
 312         _nudging = false;
 313         in_set_state = 0;
 314         in_undo = false;
 315         _edit_mode = Config->get_edit_mode();
 316         in_flush = false;
 317         in_partition = false;
 318         subcnt = 0;
 319         _frozen = false;
 320         _capture_insertion_underway = false;
 321         _combine_ops = 0;
 322         _end_space = 0;
 323
 324         _session.history().BeginUndoRedo.connect_same_thread (*this, boost::bind (&Playlist::begin_undo, this));
 325         _session.history().EndUndoRedo.connect_same_thread (*this, boost::bind (&Playlist::end_undo, this));
 326
 327         ContentsChanged.connect_same_thread (*this, boost::bind (&Playlist::mark_session_dirty, this));
 328 }
 329
 330 Playlist::~Playlist ()
 331 {
 332         DEBUG_TRACE (DEBUG::Destruction, string_compose ("Playlist %1 destructor\n", _name));
 333
 334         {
 335                 RegionReadLock rl (this);
 336
 337                 for (set<boost::shared_ptr<Region> >::iterator i = all_regions.begin(); i != all_regions.end(); ++i) {
 338                         (*i)->set_playlist (boost::shared_ptr<Playlist>());
 339                 }
 340         }
 341
 342         /* GoingAway must be emitted by derived classes */
 343 }
 344
 345 void
 346 Playlist::_set_sort_id ()
 347 {
 348         /*
 349           Playlists are given names like <track name>.<id>
 350           or <track name>.<edit group name>.<id> where id
 351           is an integer. We extract the id and sort by that.
 352         */
 353
 354         size_t dot_position = _name.val().find_last_of(".");
 355
 356         if (dot_position == string::npos) {
 357                 _sort_id = 0;
 358         } else {
 359                 string t = _name.val().substr(dot_position + 1);
 360
 361                 try {
 362                         _sort_id = boost::lexical_cast<int>(t);
 363                 }
 364
 365                 catch (boost::bad_lexical_cast e) {
 366                         _sort_id = 0;
 367                 }
 368         }
 369 }
 370
 371 bool
 372 Playlist::set_name (const string& str)
 373 {
 374         /* in a typical situation, a playlist is being used
 375            by one diskstream and also is referenced by the
 376            Session. if there are more references than that,
 377            then don't change the name.
 378         */
 379
 380         if (_refcnt > 2) {
 381                 return false;
 382         }
 383
 384         bool ret =  SessionObject::set_name(str);
 385         if (ret) {
 386                 _set_sort_id ();
 387         }
 388         return ret;
 389 }
 390
 391 /***********************************************************************
 392  CHANGE NOTIFICATION HANDLING
 393
 394  Notifications must be delayed till the region_lock is released. This
 395  is necessary because handlers for the signals may need to acquire
 396  the lock (e.g. to read from the playlist).
 397  ***********************************************************************/
 398
 399 void
 400 Playlist::begin_undo ()
 401 {
 402         in_undo = true;
 403         freeze ();
 404 }
 405
 406 void
 407 Playlist::end_undo ()
 408 {
 409         thaw (true);
 410         in_undo = false;
 411 }
 412
 413 void
 414 Playlist::freeze ()
 415 {
 416         delay_notifications ();
 417         g_atomic_int_inc (&ignore_state_changes);
 418 }
 419
 420 /** @param from_undo true if this thaw is triggered by the end of an undo on this playlist */
 421 void
 422 Playlist::thaw (bool from_undo)
 423 {
 424         g_atomic_int_dec_and_test (&ignore_state_changes);
 425         release_notifications (from_undo);
 426 }
 427
 428
 429 void
 430 Playlist::delay_notifications ()
 431 {
 432         g_atomic_int_inc (&block_notifications);
 433 }
 434
 435 /** @param from_undo true if this release is triggered by the end of an undo on this playlist */
 436 void
 437 Playlist::release_notifications (bool from_undo)
 438 {
 439         if (g_atomic_int_dec_and_test (&block_notifications)) {
 440                 flush_notifications (from_undo);
 441         }
 442 }
 443
 444 void
 445 Playlist::notify_contents_changed ()
 446 {
 447         if (holding_state ()) {
 448                 pending_contents_change = true;
 449         } else {
 450                 pending_contents_change = false;
 451                 ContentsChanged(); /* EMIT SIGNAL */
 452         }
 453 }
 454
 455 void
 456 Playlist::notify_layering_changed ()
 457 {
 458         if (holding_state ()) {
 459                 pending_layering = true;
 460         } else {
 461                 pending_layering = false;
 462                 LayeringChanged(); /* EMIT SIGNAL */
 463         }
 464 }
 465
 466 void
 467 Playlist::notify_region_removed (boost::shared_ptr<Region> r)
 468 {
 469         if (holding_state ()) {
 470                 pending_removes.insert (r);
 471                 pending_contents_change = true;
 472         } else {
 473                 /* this might not be true, but we have to act
 474                    as though it could be.
 475                 */
 476                 pending_contents_change = false;
 477                 RegionRemoved (boost::weak_ptr<Region> (r)); /* EMIT SIGNAL */
 478                 ContentsChanged (); /* EMIT SIGNAL */
 479         }
 480 }
 481
 482 void
 483 Playlist::notify_region_moved (boost::shared_ptr<Region> r)
 484 {
 485         Evoral::RangeMove<framepos_t> const move (r->last_position (), r->length (), r->position ());
 486
 487         if (holding_state ()) {
 488
 489                 pending_range_moves.push_back (move);
 490
 491         } else {
 492
 493                 list< Evoral::RangeMove<framepos_t> > m;
 494                 m.push_back (move);
 495                 RangesMoved (m, false);
 496         }
 497
 498 }
 499
 500 void
 501 Playlist::notify_region_start_trimmed (boost::shared_ptr<Region> r)
 502 {
 503         if (r->position() >= r->last_position()) {
 504                 /* trimmed shorter */
 505                 return;
 506         }
 507
 508         Evoral::Range<framepos_t> const extra (r->position(), r->last_position());
 509
 510         if (holding_state ()) {
 511
 512                 pending_region_extensions.push_back (extra);
 513
 514         } else {
 515
 516                 list<Evoral::Range<framepos_t> > r;
 517                 r.push_back (extra);
 518                 RegionsExtended (r);
 519
 520         }
 521 }
 522
 523 void
 524 Playlist::notify_region_end_trimmed (boost::shared_ptr<Region> r)
 525 {
 526         if (r->length() < r->last_length()) {
 527                 /* trimmed shorter */
 528         }
 529
 530         Evoral::Range<framepos_t> const extra (r->position() + r->last_length(), r->position() + r->length());
 531
 532         if (holding_state ()) {
 533
 534                 pending_region_extensions.push_back (extra);
 535
 536         } else {
 537
 538                 list<Evoral::Range<framepos_t> > r;
 539                 r.push_back (extra);
 540                 RegionsExtended (r);
 541         }
 542 }
 543
 544
 545 void
 546 Playlist::notify_region_added (boost::shared_ptr<Region> r)
 547 {
 548         /* the length change might not be true, but we have to act
 549            as though it could be.
 550         */
 551
 552         if (holding_state()) {
 553                 pending_adds.insert (r);
 554                 pending_contents_change = true;
 555         } else {
 556                 r->clear_changes ();
 557                 pending_contents_change = false;
 558                 RegionAdded (boost::weak_ptr<Region> (r)); /* EMIT SIGNAL */
 559                 ContentsChanged (); /* EMIT SIGNAL */
 560
 561         }
 562 }
 563
 564 /** @param from_undo true if this flush is triggered by the end of an undo on this playlist */
 565 void
 566 Playlist::flush_notifications (bool from_undo)
 567 {
 568         set<boost::shared_ptr<Region> >::iterator s;
 569         bool regions_changed = false;
 570
 571         if (in_flush) {
 572                 return;
 573         }
 574
 575         in_flush = true;
 576
 577         if (!pending_bounds.empty() || !pending_removes.empty() || !pending_adds.empty()) {
 578                 regions_changed = true;
 579         }
 580
 581         /* XXX: it'd be nice if we could use pending_bounds for
 582            RegionsExtended and RegionsMoved.
 583         */
 584
 585         /* we have no idea what order the regions ended up in pending
 586            bounds (it could be based on selection order, for example).
 587            so, to preserve layering in the "most recently moved is higher"
 588            model, sort them by existing layer, then timestamp them.
 589         */
 590
 591         // RegionSortByLayer cmp;
 592         // pending_bounds.sort (cmp);
 593
 594         list<Evoral::Range<framepos_t> > crossfade_ranges;
 595
 596         for (RegionList::iterator r = pending_bounds.begin(); r != pending_bounds.end(); ++r) {
 597                 crossfade_ranges.push_back ((*r)->last_range ());
 598                 crossfade_ranges.push_back ((*r)->range ());
 599         }
 600
 601         for (s = pending_removes.begin(); s != pending_removes.end(); ++s) {
 602                 crossfade_ranges.push_back ((*s)->range ());
 603                 remove_dependents (*s);
 604                 RegionRemoved (boost::weak_ptr<Region> (*s)); /* EMIT SIGNAL */
 605         }
 606
 607         for (s = pending_adds.begin(); s != pending_adds.end(); ++s) {
 608                 crossfade_ranges.push_back ((*s)->range ());
 609                 /* don't emit RegionAdded signal until relayering is done,
 610                    so that the region is fully setup by the time
 611                    anyone hears that its been added
 612                 */
 613         }
 614
 615         /* notify about contents/region changes first so that layering changes
 616          * in a UI will take place on the new contents.
 617          */
 618
 619         if (regions_changed || pending_contents_change) {
 620                 pending_layering = true;
 621                 ContentsChanged (); /* EMIT SIGNAL */
 622         }
 623
 624         for (s = pending_adds.begin(); s != pending_adds.end(); ++s) {
 625                 (*s)->clear_changes ();
 626                 RegionAdded (boost::weak_ptr<Region> (*s)); /* EMIT SIGNAL */
 627         }
 628
 629         if ((regions_changed && !in_set_state) || pending_layering) {
 630                 relayer ();
 631         }
 632
 633         coalesce_and_check_crossfades (crossfade_ranges);
 634
 635         if (!pending_range_moves.empty ()) {
 636                 /* We don't need to check crossfades for these as pending_bounds has
 637                    already covered it.
 638                 */
 639                 RangesMoved (pending_range_moves, from_undo);
 640         }
 641
 642         if (!pending_region_extensions.empty ()) {
 643                 RegionsExtended (pending_region_extensions);
 644         }
 645
 646         clear_pending ();
 647
 648         in_flush = false;
 649 }
 650
 651  void
 652  Playlist::clear_pending ()
 653  {
 654          pending_adds.clear ();
 655          pending_removes.clear ();
 656          pending_bounds.clear ();
 657          pending_range_moves.clear ();
 658          pending_region_extensions.clear ();
 659          pending_contents_change = false;
 660  }
 661
 662  /*************************************************************
 663    PLAYLIST OPERATIONS
 664   *************************************************************/
 665
 666 /** Note: this calls set_layer (..., DBL_MAX) so it will reset the layering index of region */
 667  void
 668  Playlist::add_region (boost::shared_ptr<Region> region, framepos_t position, float times, bool auto_partition)
 669  {
 670          RegionWriteLock rlock (this);
 671          times = fabs (times);
 672
 673          int itimes = (int) floor (times);
 674
 675          framepos_t pos = position;
 676
 677          if (times == 1 && auto_partition){
 678                  partition(pos - 1, (pos + region->length()), true);
 679          }
 680
 681          if (itimes >= 1) {
 682                  add_region_internal (region, pos);
 683                  set_layer (region, DBL_MAX);
 684                  pos += region->length();
 685                  --itimes;
 686          }
 687
 688
 689          /* note that itimes can be zero if we being asked to just
 690             insert a single fraction of the region.
 691          */
 692
 693          for (int i = 0; i < itimes; ++i) {
 694                  boost::shared_ptr<Region> copy = RegionFactory::create (region, true);
 695                  add_region_internal (copy, pos);
 696                  set_layer (copy, DBL_MAX);
 697                  pos += region->length();
 698          }
 699
 700          framecnt_t length = 0;
 701
 702          if (floor (times) != times) {
 703                  length = (framecnt_t) floor (region->length() * (times - floor (times)));
 704                  string name;
 705                  RegionFactory::region_name (name, region->name(), false);
 706
 707                  {
 708                          PropertyList plist;
 709
 710                          plist.add (Properties::start, region->start());
 711                          plist.add (Properties::length, length);
 712                          plist.add (Properties::name, name);
 713                          plist.add (Properties::layer, region->layer());
 714
 715                          boost::shared_ptr<Region> sub = RegionFactory::create (region, plist);
 716                          add_region_internal (sub, pos);
 717                          set_layer (sub, DBL_MAX);
 718                  }
 719          }
 720
 721          possibly_splice_unlocked (position, (pos + length) - position, region);
 722  }
 723
 724  void
 725  Playlist::set_region_ownership ()
 726  {
 727          RegionWriteLock rl (this);
 728          RegionList::iterator i;
 729          boost::weak_ptr<Playlist> pl (shared_from_this());
 730
 731          for (i = regions.begin(); i != regions.end(); ++i) {
 732                  (*i)->set_playlist (pl);
 733          }
 734  }
 735
 736  bool
 737  Playlist::add_region_internal (boost::shared_ptr<Region> region, framepos_t position)
 738  {
 739          if (region->data_type() != _type) {
 740                  return false;
 741          }
 742
 743          RegionSortByPosition cmp;
 744
 745          if (!first_set_state) {
 746                  boost::shared_ptr<Playlist> foo (shared_from_this());
 747                  region->set_playlist (boost::weak_ptr<Playlist>(foo));
 748          }
 749
 750          region->set_position (position);
 751
 752          regions.insert (upper_bound (regions.begin(), regions.end(), region, cmp), region);
 753          all_regions.insert (region);
 754
 755          possibly_splice_unlocked (position, region->length(), region);
 756
 757          if (!holding_state ()) {
 758                  /* layers get assigned from XML state, and are not reset during undo/redo */
 759                  relayer ();
 760          }
 761
 762          /* we need to notify the existence of new region before checking dependents. Ick. */
 763
 764          notify_region_added (region);
 765
 766          region->PropertyChanged.connect_same_thread (region_state_changed_connections, boost::bind (&Playlist::region_changed_proxy, this, _1, boost::weak_ptr<Region> (region)));
 767
 768          return true;
 769  }
 770
 771  void
 772  Playlist::replace_region (boost::shared_ptr<Region> old, boost::shared_ptr<Region> newr, framepos_t pos)
 773  {
 774          RegionWriteLock rlock (this);
 775
 776          bool old_sp = _splicing;
 777          _splicing = true;
 778
 779          remove_region_internal (old);
 780          add_region_internal (newr, pos);
 781          set_layer (newr, old->layer ());
 782
 783          _splicing = old_sp;
 784
 785          possibly_splice_unlocked (pos, old->length() - newr->length());
 786  }
 787
 788  void
 789  Playlist::remove_region (boost::shared_ptr<Region> region)
 790  {
 791          RegionWriteLock rlock (this);
 792          remove_region_internal (region);
 793  }
 794
 795  int
 796  Playlist::remove_region_internal (boost::shared_ptr<Region> region)
 797  {
 798          RegionList::iterator i;
 799
 800          if (!in_set_state) {
 801                  /* unset playlist */
 802                  region->set_playlist (boost::weak_ptr<Playlist>());
 803          }
 804
 805          /* XXX should probably freeze here .... */
 806
 807          for (i = regions.begin(); i != regions.end(); ++i) {
 808                  if (*i == region) {
 809
 810                          framepos_t pos = (*i)->position();
 811                          framecnt_t distance = (*i)->length();
 812
 813                          regions.erase (i);
 814
 815                          possibly_splice_unlocked (pos, -distance);
 816
 817                          if (!holding_state ()) {
 818                                  relayer ();
 819                                  remove_dependents (region);
 820                          }
 821
 822                          notify_region_removed (region);
 823                          break;
 824                  }
 825          }
 826
 827          return -1;
 828  }
 829
 830  void
 831  Playlist::get_equivalent_regions (boost::shared_ptr<Region> other, vector<boost::shared_ptr<Region> >& results)
 832  {
 833          if (Config->get_use_overlap_equivalency()) {
 834                  for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
 835                          if ((*i)->overlap_equivalent (other)) {
 836                                  results.push_back (*i);
 837                          }
 838                  }
 839          } else {
 840                  for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
 841                          if ((*i)->equivalent (other)) {
 842                                  results.push_back (*i);
 843                          }
 844                  }
 845          }
 846  }
 847
 848  void
 849  Playlist::get_region_list_equivalent_regions (boost::shared_ptr<Region> other, vector<boost::shared_ptr<Region> >& results)
 850  {
 851          for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
 852
 853                  if ((*i) && (*i)->region_list_equivalent (other)) {
 854                          results.push_back (*i);
 855                  }
 856          }
 857  }
 858
 859  void
 860  Playlist::get_source_equivalent_regions (boost::shared_ptr<Region> other, vector<boost::shared_ptr<Region> >& results)
 861  {
 862          for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
 863
 864                  if ((*i) && (*i)->any_source_equivalent (other)) {
 865                          results.push_back (*i);
 866                  }
 867          }
 868  }
 869
 870  void
 871  Playlist::partition (framepos_t start, framepos_t end, bool cut)
 872  {
 873          RegionList thawlist;
 874
 875          partition_internal (start, end, cut, thawlist);
 876
 877          for (RegionList::iterator i = thawlist.begin(); i != thawlist.end(); ++i) {
 878                  (*i)->resume_property_changes ();
 879          }
 880  }
 881
 882 /** Go through each region on the playlist and cut them at start and end, removing the section between
 883  *  start and end if cutting == true.  Regions that lie entirely within start and end are always
 884  *  removed.
 885  */
 886
 887  void
 888  Playlist::partition_internal (framepos_t start, framepos_t end, bool cutting, RegionList& thawlist)
 889  {
 890          RegionList new_regions;
 891
 892          {
 893                  RegionWriteLock rlock (this);
 894
 895                  boost::shared_ptr<Region> region;
 896                  boost::shared_ptr<Region> current;
 897                  string new_name;
 898                  RegionList::iterator tmp;
 899                  Evoral::OverlapType overlap;
 900                  framepos_t pos1, pos2, pos3, pos4;
 901
 902                  in_partition = true;
 903
 904                  /* need to work from a copy, because otherwise the regions we add during the process
 905                     get operated on as well.
 906                  */
 907
 908                  RegionList copy = regions.rlist();
 909
 910                  for (RegionList::iterator i = copy.begin(); i != copy.end(); i = tmp) {
 911
 912                          tmp = i;
 913                          ++tmp;
 914
 915                          current = *i;
 916
 917                          if (current->first_frame() >= start && current->last_frame() < end) {
 918
 919                                  if (cutting) {
 920                                          remove_region_internal (current);
 921                                  }
 922
 923                                  continue;
 924                          }
 925
 926                          /* coverage will return OverlapStart if the start coincides
 927                             with the end point. we do not partition such a region,
 928                             so catch this special case.
 929                          */
 930
 931                          if (current->first_frame() >= end) {
 932                                  continue;
 933                          }
 934
 935                          if ((overlap = current->coverage (start, end)) == Evoral::OverlapNone) {
 936                                  continue;
 937                          }
 938
 939                          pos1 = current->position();
 940                          pos2 = start;
 941                          pos3 = end;
 942                          pos4 = current->last_frame();
 943
 944                          if (overlap == Evoral::OverlapInternal) {
 945                                  /* split: we need 3 new regions, the front, middle and end.
 946                                     cut:   we need 2 regions, the front and end.
 947                                  */
 948
 949                                  /*
 950                                           start                 end
 951                            ---------------*************************------------
 952                                           P1  P2              P3  P4
 953                            SPLIT:
 954                            ---------------*****++++++++++++++++====------------
 955                            CUT
 956                            ---------------*****----------------====------------
 957
 958                                  */
 959
 960                                  if (!cutting) {
 961                                          /* "middle" ++++++ */
 962
 963                                          RegionFactory::region_name (new_name, current->name(), false);
 964
 965                                          PropertyList plist;
 966
 967                                          plist.add (Properties::start, current->start() + (pos2 - pos1));
 968                                          plist.add (Properties::length, pos3 - pos2);
 969                                          plist.add (Properties::name, new_name);
 970                                          plist.add (Properties::layer, current->layer ());
 971                                          plist.add (Properties::layering_index, current->layering_index ());
 972                                          plist.add (Properties::automatic, true);
 973                                          plist.add (Properties::left_of_split, true);
 974                                          plist.add (Properties::right_of_split, true);
 975
 976                                          region = RegionFactory::create (current, plist);
 977                                          add_region_internal (region, start);
 978                                          new_regions.push_back (region);
 979                                  }
 980
 981                                  /* "end" ====== */
 982
 983                                  RegionFactory::region_name (new_name, current->name(), false);
 984
 985                                  PropertyList plist;
 986
 987                                  plist.add (Properties::start, current->start() + (pos3 - pos1));
 988                                  plist.add (Properties::length, pos4 - pos3);
 989                                  plist.add (Properties::name, new_name);
 990                                  plist.add (Properties::layer, current->layer ());
 991                                  plist.add (Properties::layering_index, current->layering_index ());
 992                                  plist.add (Properties::automatic, true);
 993                                  plist.add (Properties::right_of_split, true);
 994
 995                                  region = RegionFactory::create (current, plist);
 996
 997                                  add_region_internal (region, end);
 998                                  new_regions.push_back (region);
 999
1000                                  /* "front" ***** */
1001
1002                                  current->suspend_property_changes ();
1003                                  thawlist.push_back (current);
1004                                  current->cut_end (pos2 - 1);
1005
1006                          } else if (overlap == Evoral::OverlapEnd) {
1007
1008                                  /*
1009                                                                start           end
1010                                      ---------------*************************------------
1011                                                     P1           P2         P4   P3
1012                                      SPLIT:
1013                                      ---------------**************+++++++++++------------
1014                                      CUT:
1015                                      ---------------**************-----------------------
1016                                  */
1017
1018                                  if (!cutting) {
1019
1020                                          /* end +++++ */
1021
1022                                          RegionFactory::region_name (new_name, current->name(), false);
1023
1024                                          PropertyList plist;
1025
1026                                          plist.add (Properties::start, current->start() + (pos2 - pos1));
1027                                          plist.add (Properties::length, pos4 - pos2);
1028                                          plist.add (Properties::name, new_name);
1029                                          plist.add (Properties::layer, current->layer ());
1030                                          plist.add (Properties::layering_index, current->layering_index ());
1031                                          plist.add (Properties::automatic, true);
1032                                          plist.add (Properties::left_of_split, true);
1033
1034                                          region = RegionFactory::create (current, plist);
1035
1036                                          add_region_internal (region, start);
1037                                          new_regions.push_back (region);
1038                                  }
1039
1040                                  /* front ****** */
1041
1042                                  current->suspend_property_changes ();
1043                                  thawlist.push_back (current);
1044                                  current->cut_end (pos2 - 1);
1045
1046                          } else if (overlap == Evoral::OverlapStart) {
1047
1048                                  /* split: we need 2 regions: the front and the end.
1049                                     cut: just trim current to skip the cut area
1050                                  */
1051
1052                                  /*
1053                                                          start           end
1054                                      ---------------*************************------------
1055                                         P2          P1 P3                   P4
1056
1057                                      SPLIT:
1058                                      ---------------****+++++++++++++++++++++------------
1059                                      CUT:
1060                                      -------------------*********************------------
1061
1062                                  */
1063
1064                                  if (!cutting) {
1065                                          /* front **** */
1066                                          RegionFactory::region_name (new_name, current->name(), false);
1067
1068                                          PropertyList plist;
1069
1070                                          plist.add (Properties::start, current->start());
1071                                          plist.add (Properties::length, pos3 - pos1);
1072                                          plist.add (Properties::name, new_name);
1073                                          plist.add (Properties::layer, current->layer ());
1074                                          plist.add (Properties::layering_index, current->layering_index ());
1075                                          plist.add (Properties::automatic, true);
1076                                          plist.add (Properties::right_of_split, true);
1077
1078                                          region = RegionFactory::create (current, plist);
1079
1080                                          add_region_internal (region, pos1);
1081                                          new_regions.push_back (region);
1082                                  }
1083
1084                                  /* end */
1085
1086                                  current->suspend_property_changes ();
1087                                  thawlist.push_back (current);
1088                                  current->trim_front (pos3);
1089                          } else if (overlap == Evoral::OverlapExternal) {
1090
1091                                  /* split: no split required.
1092                                     cut: remove the region.
1093                                  */
1094
1095                                  /*
1096                                         start                                      end
1097                                      ---------------*************************------------
1098                                         P2          P1 P3                   P4
1099
1100                                      SPLIT:
1101                                      ---------------*************************------------
1102                                      CUT:
1103                                      ----------------------------------------------------
1104
1105                                  */
1106
1107                                  if (cutting) {
1108                                          remove_region_internal (current);
1109                                  }
1110
1111                                  new_regions.push_back (current);
1112                          }
1113                  }
1114
1115                  in_partition = false;
1116          }
1117
1118         //keep track of any dead space at end (for pasting into Ripple or Splice mode)
1119         framepos_t wanted_length = end-start;
1120         _end_space = wanted_length - get_extent().second-get_extent().first;
1121  }
1122
1123  boost::shared_ptr<Playlist>
1124  Playlist::cut_copy (boost::shared_ptr<Playlist> (Playlist::*pmf)(framepos_t, framecnt_t,bool), list<AudioRange>& ranges, bool result_is_hidden)
1125  {
1126          boost::shared_ptr<Playlist> ret;
1127          boost::shared_ptr<Playlist> pl;
1128          framepos_t start;
1129
1130          if (ranges.empty()) {
1131                  return boost::shared_ptr<Playlist>();
1132          }
1133
1134          start = ranges.front().start;
1135
1136          for (list<AudioRange>::iterator i = ranges.begin(); i != ranges.end(); ++i) {
1137
1138                  pl = (this->*pmf)((*i).start, (*i).length(), result_is_hidden);
1139
1140                  if (i == ranges.begin()) {
1141                          ret = pl;
1142                  } else {
1143
1144                          /* paste the next section into the nascent playlist,
1145                             offset to reflect the start of the first range we
1146                             chopped.
1147                          */
1148
1149                          ret->paste (pl, (*i).start - start, 1.0f);
1150                  }
1151          }
1152
1153          return ret;
1154  }
1155
1156  boost::shared_ptr<Playlist>
1157  Playlist::cut (list<AudioRange>& ranges, bool result_is_hidden)
1158  {
1159          boost::shared_ptr<Playlist> (Playlist::*pmf)(framepos_t,framecnt_t,bool) = &Playlist::cut;
1160          return cut_copy (pmf, ranges, result_is_hidden);
1161  }
1162
1163  boost::shared_ptr<Playlist>
1164  Playlist::copy (list<AudioRange>& ranges, bool result_is_hidden)
1165  {
1166          boost::shared_ptr<Playlist> (Playlist::*pmf)(framepos_t,framecnt_t,bool) = &Playlist::copy;
1167          return cut_copy (pmf, ranges, result_is_hidden);
1168  }
1169
1170  boost::shared_ptr<Playlist>
1171  Playlist::cut (framepos_t start, framecnt_t cnt, bool result_is_hidden)
1172  {
1173          boost::shared_ptr<Playlist> the_copy;
1174          RegionList thawlist;
1175          char buf[32];
1176
1177          snprintf (buf, sizeof (buf), "%" PRIu32, ++subcnt);
1178          string new_name = _name;
1179          new_name += '.';
1180          new_name += buf;
1181
1182          if ((the_copy = PlaylistFactory::create (shared_from_this(), start, cnt, new_name, result_is_hidden)) == 0) {
1183                  return boost::shared_ptr<Playlist>();
1184          }
1185
1186          partition_internal (start, start+cnt-1, true, thawlist);
1187
1188          for (RegionList::iterator i = thawlist.begin(); i != thawlist.end(); ++i) {
1189                  (*i)->resume_property_changes();
1190          }
1191
1192          return the_copy;
1193  }
1194
1195  boost::shared_ptr<Playlist>
1196  Playlist::copy (framepos_t start, framecnt_t cnt, bool result_is_hidden)
1197  {
1198          char buf[32];
1199
1200          snprintf (buf, sizeof (buf), "%" PRIu32, ++subcnt);
1201          string new_name = _name;
1202          new_name += '.';
1203          new_name += buf;
1204
1205         // cnt = min (_get_extent().second - start, cnt);  (We need the full range length when copy/pasting in Ripple.  Why was this limit here?  It's not in CUT... )
1206
1207          return PlaylistFactory::create (shared_from_this(), start, cnt, new_name, result_is_hidden);
1208  }
1209
1210  int
1211  Playlist::paste (boost::shared_ptr<Playlist> other, framepos_t position, float times)
1212  {
1213          times = fabs (times);
1214
1215          {
1216                  RegionReadLock rl2 (other.get());
1217
1218                  int itimes = (int) floor (times);
1219                  framepos_t pos = position;
1220                  framecnt_t const shift = other->_get_extent().second;
1221                  layer_t top = top_layer ();
1222
1223                  {
1224                          RegionWriteLock rl1 (this);
1225                          while (itimes--) {
1226                                  for (RegionList::iterator i = other->regions.begin(); i != other->regions.end(); ++i) {
1227                                          boost::shared_ptr<Region> copy_of_region = RegionFactory::create (*i, true);
1228
1229                                          /* put these new regions on top of all existing ones, but preserve
1230                                             the ordering they had in the original playlist.
1231                                          */
1232
1233                                          add_region_internal (copy_of_region, (*i)->position() + pos);
1234                                          set_layer (copy_of_region, copy_of_region->layer() + top);
1235                                  }
1236                                  pos += shift;
1237                          }
1238                  }
1239          }
1240
1241          return 0;
1242  }
1243
1244
1245  void
1246  Playlist::duplicate (boost::shared_ptr<Region> region, framepos_t position, float times)
1247  {
1248          times = fabs (times);
1249
1250          RegionWriteLock rl (this);
1251          int itimes = (int) floor (times);
1252          framepos_t pos = position + 1;
1253
1254          while (itimes--) {
1255                  boost::shared_ptr<Region> copy = RegionFactory::create (region, true);
1256                  add_region_internal (copy, pos);
1257                  set_layer (copy, DBL_MAX);
1258                  pos += region->length();
1259          }
1260
1261          if (floor (times) != times) {
1262                  framecnt_t length = (framecnt_t) floor (region->length() * (times - floor (times)));
1263                  string name;
1264                  RegionFactory::region_name (name, region->name(), false);
1265
1266                  {
1267                          PropertyList plist;
1268
1269                          plist.add (Properties::start, region->start());
1270                          plist.add (Properties::length, length);
1271                          plist.add (Properties::name, name);
1272
1273                          boost::shared_ptr<Region> sub = RegionFactory::create (region, plist);
1274                          add_region_internal (sub, pos);
1275                          set_layer (sub, DBL_MAX);
1276                  }
1277          }
1278  }
1279
1280  void
1281  Playlist::shift (framepos_t at, frameoffset_t distance, bool move_intersected, bool ignore_music_glue)
1282  {
1283          RegionWriteLock rlock (this);
1284          RegionList copy (regions.rlist());
1285          RegionList fixup;
1286
1287          for (RegionList::iterator r = copy.begin(); r != copy.end(); ++r) {
1288
1289                  if ((*r)->last_frame() < at) {
1290                          /* too early */
1291                          continue;
1292                  }
1293
1294                  if (at > (*r)->first_frame() && at < (*r)->last_frame()) {
1295                          /* intersected region */
1296                          if (!move_intersected) {
1297                                  continue;
1298                          }
1299                  }
1300
1301                  /* do not move regions glued to music time - that
1302                     has to be done separately.
1303                  */
1304
1305                  if (!ignore_music_glue && (*r)->position_lock_style() != AudioTime) {
1306                          fixup.push_back (*r);
1307                          continue;
1308                  }
1309
1310                  (*r)->set_position ((*r)->position() + distance);
1311          }
1312
1313          /* XXX: may not be necessary; Region::post_set should do this, I think */
1314          for (RegionList::iterator r = fixup.begin(); r != fixup.end(); ++r) {
1315                  (*r)->recompute_position_from_lock_style ();
1316          }
1317  }
1318
1319  void
1320  Playlist::split (framepos_t at)
1321  {
1322          RegionWriteLock rlock (this);
1323          RegionList copy (regions.rlist());
1324
1325          /* use a copy since this operation can modify the region list
1326           */
1327
1328          for (RegionList::iterator r = copy.begin(); r != copy.end(); ++r) {
1329                  _split_region (*r, at);
1330          }
1331  }
1332
1333  void
1334  Playlist::split_region (boost::shared_ptr<Region> region, framepos_t playlist_position)
1335  {
1336          RegionWriteLock rl (this);
1337          _split_region (region, playlist_position);
1338  }
1339
1340  void
1341  Playlist::_split_region (boost::shared_ptr<Region> region, framepos_t playlist_position)
1342  {
1343          if (!region->covers (playlist_position)) {
1344                  return;
1345          }
1346
1347          if (region->position() == playlist_position ||
1348              region->last_frame() == playlist_position) {
1349                  return;
1350          }
1351
1352          boost::shared_ptr<Region> left;
1353          boost::shared_ptr<Region> right;
1354          frameoffset_t before;
1355          frameoffset_t after;
1356          string before_name;
1357          string after_name;
1358
1359          /* split doesn't change anything about length, so don't try to splice */
1360
1361          bool old_sp = _splicing;
1362          _splicing = true;
1363
1364          before = playlist_position - region->position();
1365          after = region->length() - before;
1366
1367          RegionFactory::region_name (before_name, region->name(), false);
1368
1369          {
1370                  PropertyList plist;
1371
1372                  plist.add (Properties::position, region->position ());
1373                  plist.add (Properties::length, before);
1374                  plist.add (Properties::name, before_name);
1375                  plist.add (Properties::left_of_split, true);
1376                  plist.add (Properties::layering_index, region->layering_index ());
1377                  plist.add (Properties::layer, region->layer ());
1378
1379                  /* note: we must use the version of ::create with an offset here,
1380                     since it supplies that offset to the Region constructor, which
1381                     is necessary to get audio region gain envelopes right.
1382                  */
1383                  left = RegionFactory::create (region, 0, plist);
1384          }
1385
1386          RegionFactory::region_name (after_name, region->name(), false);
1387
1388          {
1389                  PropertyList plist;
1390
1391                  plist.add (Properties::position, region->position() + before);
1392                  plist.add (Properties::length, after);
1393                  plist.add (Properties::name, after_name);
1394                  plist.add (Properties::right_of_split, true);
1395                  plist.add (Properties::layering_index, region->layering_index ());
1396                  plist.add (Properties::layer, region->layer ());
1397
1398                  /* same note as above */
1399                  right = RegionFactory::create (region, before, plist);
1400          }
1401
1402          add_region_internal (left, region->position());
1403          add_region_internal (right, region->position() + before);
1404          remove_region_internal (region);
1405
1406          _splicing = old_sp;
1407  }
1408
1409  void
1410  Playlist::possibly_splice (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude)
1411  {
1412          if (_splicing || in_set_state) {
1413                  /* don't respond to splicing moves or state setting */
1414                  return;
1415          }
1416
1417          if (_edit_mode == Splice) {
1418                  splice_locked (at, distance, exclude);
1419          }
1420  }
1421
1422  void
1423  Playlist::possibly_splice_unlocked (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude)
1424  {
1425          if (_splicing || in_set_state) {
1426                  /* don't respond to splicing moves or state setting */
1427                  return;
1428          }
1429
1430          if (_edit_mode == Splice) {
1431                  splice_unlocked (at, distance, exclude);
1432          }
1433  }
1434
1435  void
1436  Playlist::splice_locked (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude)
1437  {
1438          {
1439                  RegionWriteLock rl (this);
1440                  core_splice (at, distance, exclude);
1441          }
1442  }
1443
1444  void
1445  Playlist::splice_unlocked (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude)
1446  {
1447          core_splice (at, distance, exclude);
1448  }
1449
1450  void
1451  Playlist::core_splice (framepos_t at, framecnt_t distance, boost::shared_ptr<Region> exclude)
1452  {
1453          _splicing = true;
1454
1455          for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1456
1457                  if (exclude && (*i) == exclude) {
1458                          continue;
1459                  }
1460
1461                  if ((*i)->position() >= at) {
1462                          framepos_t new_pos = (*i)->position() + distance;
1463                          if (new_pos < 0) {
1464                                  new_pos = 0;
1465                          } else if (new_pos >= max_framepos - (*i)->length()) {
1466                                  new_pos = max_framepos - (*i)->length();
1467                          }
1468
1469                          (*i)->set_position (new_pos);
1470                  }
1471          }
1472
1473          _splicing = false;
1474
1475          notify_contents_changed ();
1476 }
1477
1478 void
1479 Playlist::ripple_locked (framepos_t at, framecnt_t distance, RegionList *exclude)
1480 {
1481         {
1482                 RegionWriteLock rl (this);
1483                 core_ripple (at, distance, exclude);
1484         }
1485 }
1486
1487 void
1488 Playlist::ripple_unlocked (framepos_t at, framecnt_t distance, RegionList *exclude)
1489 {
1490         core_ripple (at, distance, exclude);
1491 }
1492
1493 void
1494 Playlist::core_ripple (framepos_t at, framecnt_t distance, RegionList *exclude)
1495 {
1496         if (distance == 0) {
1497                 return;
1498         }
1499
1500         _rippling = true;
1501         RegionListProperty copy = regions;
1502         for (RegionList::iterator i = copy.begin(); i != copy.end(); ++i) {
1503                 assert (i != copy.end());
1504
1505                 if (exclude) {
1506                         if (std::find(exclude->begin(), exclude->end(), (*i)) != exclude->end()) {
1507                                 continue;
1508                         }
1509                 }
1510
1511                 if ((*i)->position() >= at) {
1512                         framepos_t new_pos = (*i)->position() + distance;
1513                         framepos_t limit = max_framepos - (*i)->length();
1514                         if (new_pos < 0) {
1515                                 new_pos = 0;
1516                         } else if (new_pos >= limit ) {
1517                                 new_pos = limit;
1518                         }
1519
1520                         (*i)->set_position (new_pos);
1521                 }
1522         }
1523
1524         _rippling = false;
1525         notify_contents_changed ();
1526 }
1527
1528
1529 void
1530 Playlist::region_bounds_changed (const PropertyChange& what_changed, boost::shared_ptr<Region> region)
1531 {
1532          if (in_set_state || _splicing || _rippling || _nudging || _shuffling) {
1533                  return;
1534          }
1535
1536          if (what_changed.contains (Properties::position)) {
1537
1538                  /* remove it from the list then add it back in
1539                     the right place again.
1540                  */
1541
1542                  RegionSortByPosition cmp;
1543
1544                  RegionList::iterator i = find (regions.begin(), regions.end(), region);
1545
1546                  if (i == regions.end()) {
1547                          /* the region bounds are being modified but its not currently
1548                             in the region list. we will use its bounds correctly when/if
1549                             it is added
1550                          */
1551                          return;
1552                  }
1553
1554                  regions.erase (i);
1555                  regions.insert (upper_bound (regions.begin(), regions.end(), region, cmp), region);
1556          }
1557
1558          if (what_changed.contains (Properties::position) || what_changed.contains (Properties::length)) {
1559
1560                  frameoffset_t delta = 0;
1561
1562                  if (what_changed.contains (Properties::position)) {
1563                          delta = region->position() - region->last_position();
1564                  }
1565
1566                  if (what_changed.contains (Properties::length)) {
1567                          delta += region->length() - region->last_length();
1568                  }
1569
1570                  if (delta) {
1571                          possibly_splice (region->last_position() + region->last_length(), delta, region);
1572                  }
1573
1574                  if (holding_state ()) {
1575                          pending_bounds.push_back (region);
1576                  } else {
1577                          notify_contents_changed ();
1578                          relayer ();
1579                          list<Evoral::Range<framepos_t> > xf;
1580                          xf.push_back (Evoral::Range<framepos_t> (region->last_range()));
1581                          xf.push_back (Evoral::Range<framepos_t> (region->range()));
1582                          coalesce_and_check_crossfades (xf);
1583                  }
1584          }
1585  }
1586
1587  void
1588  Playlist::region_changed_proxy (const PropertyChange& what_changed, boost::weak_ptr<Region> weak_region)
1589  {
1590          boost::shared_ptr<Region> region (weak_region.lock());
1591
1592          if (!region) {
1593                  return;
1594          }
1595
1596          /* this makes a virtual call to the right kind of playlist ... */
1597
1598          region_changed (what_changed, region);
1599  }
1600
1601  bool
1602  Playlist::region_changed (const PropertyChange& what_changed, boost::shared_ptr<Region> region)
1603  {
1604          PropertyChange our_interests;
1605          PropertyChange bounds;
1606          PropertyChange pos_and_length;
1607          bool save = false;
1608
1609          if (in_set_state || in_flush) {
1610                  return false;
1611          }
1612
1613          our_interests.add (Properties::muted);
1614          our_interests.add (Properties::layer);
1615          our_interests.add (Properties::opaque);
1616
1617          bounds.add (Properties::start);
1618          bounds.add (Properties::position);
1619          bounds.add (Properties::length);
1620
1621          pos_and_length.add (Properties::position);
1622          pos_and_length.add (Properties::length);
1623
1624          if (what_changed.contains (bounds)) {
1625                  region_bounds_changed (what_changed, region);
1626                  save = !(_splicing || _nudging);
1627          }
1628
1629          if (what_changed.contains (Properties::position) && !what_changed.contains (Properties::length)) {
1630                  notify_region_moved (region);
1631          } else if (!what_changed.contains (Properties::position) && what_changed.contains (Properties::length)) {
1632                  notify_region_end_trimmed (region);
1633          } else if (what_changed.contains (Properties::position) && what_changed.contains (Properties::length)) {
1634                  notify_region_start_trimmed (region);
1635          }
1636
1637          /* don't notify about layer changes, since we are the only object that can initiate
1638             them, and we notify in ::relayer()
1639          */
1640
1641          if (what_changed.contains (our_interests)) {
1642                  save = true;
1643          }
1644
1645          return save;
1646  }
1647
1648  void
1649  Playlist::drop_regions ()
1650  {
1651          RegionWriteLock rl (this);
1652          regions.clear ();
1653          all_regions.clear ();
1654  }
1655
1656  void
1657  Playlist::sync_all_regions_with_regions ()
1658  {
1659          RegionWriteLock rl (this);
1660
1661          all_regions.clear ();
1662
1663          for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1664                  all_regions.insert (*i);
1665          }
1666  }
1667
1668  void
1669  Playlist::clear (bool with_signals)
1670  {
1671          {
1672                  RegionWriteLock rl (this);
1673
1674                  region_state_changed_connections.drop_connections ();
1675
1676                  for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1677                          pending_removes.insert (*i);
1678                  }
1679
1680                  regions.clear ();
1681
1682                  for (set<boost::shared_ptr<Region> >::iterator s = pending_removes.begin(); s != pending_removes.end(); ++s) {
1683                          remove_dependents (*s);
1684                  }
1685          }
1686
1687          if (with_signals) {
1688
1689                  for (set<boost::shared_ptr<Region> >::iterator s = pending_removes.begin(); s != pending_removes.end(); ++s) {
1690                          RegionRemoved (boost::weak_ptr<Region> (*s)); /* EMIT SIGNAL */
1691                  }
1692
1693                  pending_removes.clear ();
1694                  pending_contents_change = false;
1695                  ContentsChanged ();
1696          }
1697
1698  }
1699
1700  /***********************************************************************
1701   FINDING THINGS
1702   **********************************************************************/
1703
1704 boost::shared_ptr<RegionList>
1705 Playlist::regions_at (framepos_t frame)
1706 {
1707         RegionReadLock rlock (this);
1708         return find_regions_at (frame);
1709 }
1710
1711  uint32_t
1712  Playlist::count_regions_at (framepos_t frame) const
1713  {
1714          RegionReadLock rlock (const_cast<Playlist*>(this));
1715          uint32_t cnt = 0;
1716
1717          for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
1718                  if ((*i)->covers (frame)) {
1719                          cnt++;
1720                  }
1721          }
1722
1723          return cnt;
1724  }
1725
1726  boost::shared_ptr<Region>
1727  Playlist::top_region_at (framepos_t frame)
1728
1729  {
1730          RegionReadLock rlock (this);
1731          boost::shared_ptr<RegionList> rlist = find_regions_at (frame);
1732          boost::shared_ptr<Region> region;
1733
1734          if (rlist->size()) {
1735                  RegionSortByLayer cmp;
1736                  rlist->sort (cmp);
1737                  region = rlist->back();
1738          }
1739
1740          return region;
1741  }
1742
1743  boost::shared_ptr<Region>
1744  Playlist::top_unmuted_region_at (framepos_t frame)
1745
1746  {
1747          RegionReadLock rlock (this);
1748          boost::shared_ptr<RegionList> rlist = find_regions_at (frame);
1749
1750          for (RegionList::iterator i = rlist->begin(); i != rlist->end(); ) {
1751
1752                  RegionList::iterator tmp = i;
1753                  ++tmp;
1754
1755                  if ((*i)->muted()) {
1756                          rlist->erase (i);
1757                  }
1758
1759                  i = tmp;
1760          }
1761
1762          boost::shared_ptr<Region> region;
1763
1764          if (rlist->size()) {
1765                  RegionSortByLayer cmp;
1766                  rlist->sort (cmp);
1767                  region = rlist->back();
1768          }
1769
1770          return region;
1771  }
1772
1773 boost::shared_ptr<RegionList>
1774 Playlist::find_regions_at (framepos_t frame)
1775 {
1776         /* Caller must hold lock */
1777
1778         boost::shared_ptr<RegionList> rlist (new RegionList);
1779
1780         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1781                 if ((*i)->covers (frame)) {
1782                         rlist->push_back (*i);
1783                 }
1784         }
1785
1786         return rlist;
1787 }
1788
1789 boost::shared_ptr<RegionList>
1790 Playlist::regions_with_start_within (Evoral::Range<framepos_t> range)
1791 {
1792         RegionReadLock rlock (this);
1793         boost::shared_ptr<RegionList> rlist (new RegionList);
1794
1795         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1796                 if ((*i)->first_frame() >= range.from && (*i)->first_frame() <= range.to) {
1797                         rlist->push_back (*i);
1798                 }
1799         }
1800
1801         return rlist;
1802 }
1803
1804 boost::shared_ptr<RegionList>
1805 Playlist::regions_with_end_within (Evoral::Range<framepos_t> range)
1806 {
1807         RegionReadLock rlock (this);
1808         boost::shared_ptr<RegionList> rlist (new RegionList);
1809
1810         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1811                 if ((*i)->last_frame() >= range.from && (*i)->last_frame() <= range.to) {
1812                         rlist->push_back (*i);
1813                 }
1814         }
1815
1816         return rlist;
1817 }
1818
1819 /** @param start Range start.
1820  *  @param end Range end.
1821  *  @return regions which have some part within this range.
1822  */
1823 boost::shared_ptr<RegionList>
1824 Playlist::regions_touched (framepos_t start, framepos_t end)
1825 {
1826         RegionReadLock rlock (this);
1827         return regions_touched_locked (start, end);
1828 }
1829
1830 boost::shared_ptr<RegionList>
1831 Playlist::regions_touched_locked (framepos_t start, framepos_t end)
1832 {
1833         boost::shared_ptr<RegionList> rlist (new RegionList);
1834
1835         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1836                 if ((*i)->coverage (start, end) != Evoral::OverlapNone) {
1837                         rlist->push_back (*i);
1838                 }
1839         }
1840
1841         return rlist;
1842 }
1843
1844 framepos_t
1845 Playlist::find_next_transient (framepos_t from, int dir)
1846 {
1847         RegionReadLock rlock (this);
1848         AnalysisFeatureList points;
1849         AnalysisFeatureList these_points;
1850
1851         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1852                 if (dir > 0) {
1853                         if ((*i)->last_frame() < from) {
1854                                 continue;
1855                         }
1856                 } else {
1857                         if ((*i)->first_frame() > from) {
1858                                 continue;
1859                         }
1860                 }
1861
1862                 (*i)->get_transients (these_points);
1863
1864                 /* add first frame, just, err, because */
1865
1866                 these_points.push_back ((*i)->first_frame());
1867
1868                 points.insert (points.end(), these_points.begin(), these_points.end());
1869                 these_points.clear ();
1870         }
1871
1872         if (points.empty()) {
1873                 return -1;
1874         }
1875
1876         TransientDetector::cleanup_transients (points, _session.frame_rate(), 3.0);
1877         bool reached = false;
1878
1879         if (dir > 0) {
1880                 for (AnalysisFeatureList::iterator x = points.begin(); x != points.end(); ++x) {
1881                         if ((*x) >= from) {
1882                                 reached = true;
1883                         }
1884
1885                         if (reached && (*x) > from) {
1886                                 return *x;
1887                         }
1888                 }
1889         } else {
1890                 for (AnalysisFeatureList::reverse_iterator x = points.rbegin(); x != points.rend(); ++x) {
1891                         if ((*x) <= from) {
1892                                 reached = true;
1893                         }
1894
1895                         if (reached && (*x) < from) {
1896                                 return *x;
1897                         }
1898                 }
1899         }
1900
1901         return -1;
1902 }
1903
1904 boost::shared_ptr<Region>
1905 Playlist::find_next_region (framepos_t frame, RegionPoint point, int dir)
1906 {
1907         RegionReadLock rlock (this);
1908         boost::shared_ptr<Region> ret;
1909         framepos_t closest = max_framepos;
1910
1911         bool end_iter = false;
1912
1913         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1914
1915                 if(end_iter) break;
1916
1917                 frameoffset_t distance;
1918                 boost::shared_ptr<Region> r = (*i);
1919                 framepos_t pos = 0;
1920
1921                 switch (point) {
1922                 case Start:
1923                         pos = r->first_frame ();
1924                         break;
1925                 case End:
1926                         pos = r->last_frame ();
1927                         break;
1928                 case SyncPoint:
1929                         pos = r->sync_position ();
1930                         break;
1931                 }
1932
1933                 switch (dir) {
1934                 case 1: /* forwards */
1935
1936                         if (pos > frame) {
1937                                 if ((distance = pos - frame) < closest) {
1938                                         closest = distance;
1939                                         ret = r;
1940                                         end_iter = true;
1941                                 }
1942                         }
1943
1944                         break;
1945
1946                 default: /* backwards */
1947
1948                         if (pos < frame) {
1949                                 if ((distance = frame - pos) < closest) {
1950                                         closest = distance;
1951                                         ret = r;
1952                                 }
1953                         } else {
1954                                 end_iter = true;
1955                         }
1956
1957                         break;
1958                 }
1959         }
1960
1961         return ret;
1962 }
1963
1964  framepos_t
1965  Playlist::find_next_region_boundary (framepos_t frame, int dir)
1966  {
1967          RegionReadLock rlock (this);
1968
1969          framepos_t closest = max_framepos;
1970          framepos_t ret = -1;
1971
1972          if (dir > 0) {
1973
1974                  for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
1975
1976                          boost::shared_ptr<Region> r = (*i);
1977                          frameoffset_t distance;
1978
1979                          if (r->first_frame() > frame) {
1980
1981                                  distance = r->first_frame() - frame;
1982
1983                                  if (distance < closest) {
1984                                          ret = r->first_frame();
1985                                          closest = distance;
1986                                  }
1987                          }
1988
1989                          if (r->last_frame () > frame) {
1990
1991                                  distance = r->last_frame () - frame;
1992
1993                                  if (distance < closest) {
1994                                          ret = r->last_frame ();
1995                                          closest = distance;
1996                                  }
1997                          }
1998                  }
1999
2000          } else {
2001
2002                  for (RegionList::reverse_iterator i = regions.rbegin(); i != regions.rend(); ++i) {
2003
2004                          boost::shared_ptr<Region> r = (*i);
2005                          frameoffset_t distance;
2006
2007                          if (r->last_frame() < frame) {
2008
2009                                  distance = frame - r->last_frame();
2010
2011                                  if (distance < closest) {
2012                                          ret = r->last_frame();
2013                                          closest = distance;
2014                                  }
2015                          }
2016
2017                          if (r->first_frame() < frame) {
2018
2019                                  distance = frame - r->first_frame();
2020
2021                                  if (distance < closest) {
2022                                          ret = r->first_frame();
2023                                          closest = distance;
2024                                  }
2025                          }
2026                  }
2027          }
2028
2029          return ret;
2030  }
2031
2032
2033  /***********************************************************************/
2034
2035
2036
2037
2038  void
2039  Playlist::mark_session_dirty ()
2040  {
2041          if (!in_set_state && !holding_state ()) {
2042                  _session.set_dirty();
2043          }
2044  }
2045
2046  void
2047  Playlist::rdiff (vector<Command*>& cmds) const
2048  {
2049          RegionReadLock rlock (const_cast<Playlist *> (this));
2050          Stateful::rdiff (cmds);
2051  }
2052
2053  void
2054  Playlist::clear_owned_changes ()
2055  {
2056          RegionReadLock rlock (this);
2057          Stateful::clear_owned_changes ();
2058  }
2059
2060  void
2061  Playlist::update (const RegionListProperty::ChangeRecord& change)
2062  {
2063          DEBUG_TRACE (DEBUG::Properties, string_compose ("Playlist %1 updates from a change record with %2 adds %3 removes\n",
2064                                                          name(), change.added.size(), change.removed.size()));
2065
2066          freeze ();
2067          /* add the added regions */
2068          for (RegionListProperty::ChangeContainer::const_iterator i = change.added.begin(); i != change.added.end(); ++i) {
2069                  add_region_internal ((*i), (*i)->position());
2070          }
2071          /* remove the removed regions */
2072          for (RegionListProperty::ChangeContainer::const_iterator i = change.removed.begin(); i != change.removed.end(); ++i) {
2073                  remove_region (*i);
2074          }
2075
2076          thaw ();
2077  }
2078
2079  int
2080  Playlist::set_state (const XMLNode& node, int version)
2081  {
2082          XMLNode *child;
2083          XMLNodeList nlist;
2084          XMLNodeConstIterator niter;
2085          XMLPropertyList plist;
2086          XMLPropertyConstIterator piter;
2087          XMLProperty *prop;
2088          boost::shared_ptr<Region> region;
2089          string region_name;
2090          bool seen_region_nodes = false;
2091          int ret = 0;
2092
2093          in_set_state++;
2094
2095          if (node.name() != "Playlist") {
2096                  in_set_state--;
2097                  return -1;
2098          }
2099
2100          freeze ();
2101
2102          plist = node.properties();
2103
2104          set_id (node);
2105
2106          for (piter = plist.begin(); piter != plist.end(); ++piter) {
2107
2108                  prop = *piter;
2109
2110                  if (prop->name() == X_("name")) {
2111                          _name = prop->value();
2112                          _set_sort_id ();
2113                  } else if (prop->name() == X_("orig-diskstream-id")) {
2114                          /* XXX legacy session: fix up later */
2115                          _orig_track_id = prop->value ();
2116                  } else if (prop->name() == X_("orig-track-id")) {
2117                          _orig_track_id = prop->value ();
2118                  } else if (prop->name() == X_("frozen")) {
2119                          _frozen = string_is_affirmative (prop->value());
2120                  } else if (prop->name() == X_("combine-ops")) {
2121                          _combine_ops = atoi (prop->value());
2122                  }
2123          }
2124
2125          clear (true);
2126
2127          nlist = node.children();
2128
2129          for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2130
2131                  child = *niter;
2132
2133                  if (child->name() == "Region") {
2134
2135                          seen_region_nodes = true;
2136
2137                          if ((prop = child->property ("id")) == 0) {
2138                                  error << _("region state node has no ID, ignored") << endmsg;
2139                                  continue;
2140                          }
2141
2142                          ID id = prop->value ();
2143
2144                          if ((region = region_by_id (id))) {
2145
2146                                  region->suspend_property_changes ();
2147
2148                                  if (region->set_state (*child, version)) {
2149                                          region->resume_property_changes ();
2150                                          continue;
2151                                  }
2152
2153                          } else if ((region = RegionFactory::create (_session, *child, true)) != 0) {
2154                                  region->suspend_property_changes ();
2155                          } else {
2156                                  error << _("Playlist: cannot create region from XML") << endmsg;
2157                                 return -1;
2158                         }
2159
2160                          {
2161                                  RegionWriteLock rlock (this);
2162                                  add_region_internal (region, region->position());
2163                          }
2164
2165                         region->resume_property_changes ();
2166
2167                 }
2168         }
2169
2170         if (seen_region_nodes && regions.empty()) {
2171                 ret = -1;
2172         }
2173
2174         thaw ();
2175         notify_contents_changed ();
2176
2177         in_set_state--;
2178         first_set_state = false;
2179
2180         return ret;
2181 }
2182
2183 XMLNode&
2184 Playlist::get_state()
2185 {
2186         return state (true);
2187 }
2188
2189 XMLNode&
2190 Playlist::get_template()
2191 {
2192         return state (false);
2193 }
2194
2195 /** @param full_state true to include regions in the returned state, otherwise false.
2196  */
2197 XMLNode&
2198 Playlist::state (bool full_state)
2199 {
2200         XMLNode *node = new XMLNode (X_("Playlist"));
2201         char buf[64];
2202
2203         node->add_property (X_("id"), id().to_s());
2204         node->add_property (X_("name"), _name);
2205         node->add_property (X_("type"), _type.to_string());
2206
2207         _orig_track_id.print (buf, sizeof (buf));
2208         node->add_property (X_("orig-track-id"), buf);
2209         node->add_property (X_("frozen"), _frozen ? "yes" : "no");
2210
2211         if (full_state) {
2212                 RegionReadLock rlock (this);
2213
2214                 snprintf (buf, sizeof (buf), "%u", _combine_ops);
2215                 node->add_property ("combine-ops", buf);
2216
2217                 for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
2218                         node->add_child_nocopy ((*i)->get_state());
2219                 }
2220         }
2221
2222         if (_extra_xml) {
2223                 node->add_child_copy (*_extra_xml);
2224         }
2225
2226         return *node;
2227 }
2228
2229 bool
2230 Playlist::empty() const
2231 {
2232         RegionReadLock rlock (const_cast<Playlist *>(this));
2233         return regions.empty();
2234 }
2235
2236 uint32_t
2237 Playlist::n_regions() const
2238 {
2239         RegionReadLock rlock (const_cast<Playlist *>(this));
2240         return regions.size();
2241 }
2242
2243 /** @return true if the all_regions list is empty, ie this playlist
2244  *  has never had a region added to it.
2245  */
2246 bool
2247 Playlist::all_regions_empty() const
2248 {
2249         RegionReadLock rl (const_cast<Playlist *> (this));
2250         return all_regions.empty();
2251 }
2252
2253 pair<framepos_t, framepos_t>
2254 Playlist::get_extent () const
2255 {
2256         RegionReadLock rlock (const_cast<Playlist *>(this));
2257         return _get_extent ();
2258 }
2259
2260 pair<framepos_t, framepos_t>
2261 Playlist::get_extent_with_endspace () const
2262 {
2263         pair<framepos_t, framepos_t> l = get_extent();
2264         l.second += _end_space;
2265         return l;
2266 }
2267
2268 pair<framepos_t, framepos_t>
2269 Playlist::_get_extent () const
2270 {
2271         pair<framepos_t, framepos_t> ext (max_framepos, 0);
2272
2273         if (regions.empty()) {
2274                 ext.first = 0;
2275                 return ext;
2276         }
2277
2278         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
2279                 pair<framepos_t, framepos_t> const e ((*i)->position(), (*i)->position() + (*i)->length());
2280                 if (e.first < ext.first) {
2281                         ext.first = e.first;
2282                 }
2283                 if (e.second > ext.second) {
2284                         ext.second = e.second;
2285                 }
2286         }
2287
2288         return ext;
2289 }
2290
2291 string
2292 Playlist::bump_name (string name, Session &session)
2293 {
2294         string newname = name;
2295
2296         do {
2297                 newname = bump_name_once (newname, '.');
2298         } while (session.playlists->by_name (newname)!=NULL);
2299
2300         return newname;
2301 }
2302
2303
2304 layer_t
2305 Playlist::top_layer() const
2306 {
2307         RegionReadLock rlock (const_cast<Playlist *> (this));
2308         layer_t top = 0;
2309
2310         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
2311                 top = max (top, (*i)->layer());
2312         }
2313         return top;
2314 }
2315
2316 void
2317 Playlist::set_edit_mode (EditMode mode)
2318 {
2319         _edit_mode = mode;
2320 }
2321
2322 struct RelayerSort {
2323         bool operator () (boost::shared_ptr<Region> a, boost::shared_ptr<Region> b) {
2324                 return a->layering_index() < b->layering_index();
2325         }
2326 };
2327
2328 /** Set a new layer for a region.  This adjusts the layering indices of all
2329  *  regions in the playlist to put the specified region in the appropriate
2330  *  place.  The actual layering will be fixed up when relayer() happens.
2331  */
2332
2333 void
2334 Playlist::set_layer (boost::shared_ptr<Region> region, double new_layer)
2335 {
2336         /* Remove the layer we are setting from our region list, and sort it */
2337         RegionList copy = regions.rlist();
2338         copy.remove (region);
2339         copy.sort (RelayerSort ());
2340
2341         /* Put region back in the right place */
2342         RegionList::iterator i = copy.begin();
2343         while (i != copy.end ()) {
2344                 if ((*i)->layer() > new_layer) {
2345                         break;
2346                 }
2347                 ++i;
2348         }
2349
2350         copy.insert (i, region);
2351
2352         setup_layering_indices (copy);
2353 }
2354
2355 void
2356 Playlist::setup_layering_indices (RegionList const & regions)
2357 {
2358         uint64_t j = 0;
2359         list<Evoral::Range<framepos_t> > xf;
2360
2361         for (RegionList::const_iterator k = regions.begin(); k != regions.end(); ++k) {
2362                 (*k)->set_layering_index (j++);
2363         }
2364 }
2365
2366 /** Take the layering indices of each of our regions, compute the layers
2367  *  that they should be on, and write the layers back to the regions.
2368  */
2369 void
2370 Playlist::relayer ()
2371 {
2372         /* never compute layers when setting from XML */
2373
2374         if (in_set_state) {
2375                 return;
2376         }
2377
2378         /* Build up a new list of regions on each layer, stored in a set of lists
2379            each of which represent some period of time on some layer.  The idea
2380            is to avoid having to search the entire region list to establish whether
2381            each region overlaps another */
2382
2383         /* how many pieces to divide this playlist's time up into */
2384         int const divisions = 512;
2385
2386         /* find the start and end positions of the regions on this playlist */
2387         framepos_t start = INT64_MAX;
2388         framepos_t end = 0;
2389         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
2390                 start = min (start, (*i)->position());
2391                 end = max (end, (*i)->position() + (*i)->length());
2392         }
2393
2394         /* hence the size of each time division */
2395         double const division_size = (end - start) / double (divisions);
2396
2397         vector<vector<RegionList> > layers;
2398         layers.push_back (vector<RegionList> (divisions));
2399
2400         /* Sort our regions into layering index order */
2401         RegionList copy = regions.rlist();
2402         copy.sort (RelayerSort ());
2403
2404         DEBUG_TRACE (DEBUG::Layering, "relayer() using:\n");
2405         for (RegionList::iterator i = copy.begin(); i != copy.end(); ++i) {
2406                 DEBUG_TRACE (DEBUG::Layering, string_compose ("\t%1 %2\n", (*i)->name(), (*i)->layering_index()));
2407         }
2408
2409         for (RegionList::iterator i = copy.begin(); i != copy.end(); ++i) {
2410
2411                 /* find the time divisions that this region covers; if there are no regions on the list,
2412                    division_size will equal 0 and in this case we'll just say that
2413                    start_division = end_division = 0.
2414                 */
2415                 int start_division = 0;
2416                 int end_division = 0;
2417
2418                 if (division_size > 0) {
2419                         start_division = floor ( ((*i)->position() - start) / division_size);
2420                         end_division = floor ( ((*i)->position() + (*i)->length() - start) / division_size );
2421                         if (end_division == divisions) {
2422                                 end_division--;
2423                         }
2424                 }
2425
2426                 assert (divisions == 0 || end_division < divisions);
2427
2428                 /* find the lowest layer that this region can go on */
2429                 size_t j = layers.size();
2430                 while (j > 0) {
2431                         /* try layer j - 1; it can go on if it overlaps no other region
2432                            that is already on that layer
2433                         */
2434
2435                         bool overlap = false;
2436                         for (int k = start_division; k <= end_division; ++k) {
2437                                 RegionList::iterator l = layers[j-1][k].begin ();
2438                                 while (l != layers[j-1][k].end()) {
2439                                         if ((*l)->overlap_equivalent (*i)) {
2440                                                 overlap = true;
2441                                                 break;
2442                                         }
2443                                         l++;
2444                                 }
2445
2446                                 if (overlap) {
2447                                         break;
2448                                 }
2449                         }
2450
2451                         if (overlap) {
2452                                 /* overlap, so we must use layer j */
2453                                 break;
2454                         }
2455
2456                         --j;
2457                 }
2458
2459                 if (j == layers.size()) {
2460                         /* we need a new layer for this region */
2461                         layers.push_back (vector<RegionList> (divisions));
2462                 }
2463
2464                 /* put a reference to this region in each of the divisions that it exists in */
2465                 for (int k = start_division; k <= end_division; ++k) {
2466                         layers[j][k].push_back (*i);
2467                 }
2468
2469                 (*i)->set_layer (j);
2470         }
2471
2472         /* It's a little tricky to know when we could avoid calling this; e.g. if we are
2473            relayering because we just removed the only region on the top layer, nothing will
2474            appear to have changed, but the StreamView must still sort itself out.  We could
2475            probably keep a note of the top layer last time we relayered, and check that,
2476            but premature optimisation &c...
2477         */
2478         notify_layering_changed ();
2479
2480         /* This relayer() may have been called as a result of a region removal, in which
2481            case we need to setup layering indices to account for the one that has just
2482            gone away.
2483         */
2484         setup_layering_indices (copy);
2485 }
2486
2487 void
2488 Playlist::raise_region (boost::shared_ptr<Region> region)
2489 {
2490         set_layer (region, region->layer() + 1.5);
2491         relayer ();
2492 }
2493
2494 void
2495 Playlist::lower_region (boost::shared_ptr<Region> region)
2496 {
2497         set_layer (region, region->layer() - 1.5);
2498         relayer ();
2499 }
2500
2501 void
2502 Playlist::raise_region_to_top (boost::shared_ptr<Region> region)
2503 {
2504         set_layer (region, DBL_MAX);
2505         relayer ();
2506 }
2507
2508 void
2509 Playlist::lower_region_to_bottom (boost::shared_ptr<Region> region)
2510 {
2511         set_layer (region, -0.5);
2512         relayer ();
2513 }
2514
2515 void
2516 Playlist::nudge_after (framepos_t start, framecnt_t distance, bool forwards)
2517 {
2518         RegionList::iterator i;
2519         bool moved = false;
2520
2521         _nudging = true;
2522
2523         {
2524                 RegionWriteLock rlock (const_cast<Playlist *> (this));
2525
2526                 for (i = regions.begin(); i != regions.end(); ++i) {
2527
2528                         if ((*i)->position() >= start) {
2529
2530                                 framepos_t new_pos;
2531
2532                                 if (forwards) {
2533
2534                                         if ((*i)->last_frame() > max_framepos - distance) {
2535                                                 new_pos = max_framepos - (*i)->length();
2536                                         } else {
2537                                                 new_pos = (*i)->position() + distance;
2538                                         }
2539
2540                                 } else {
2541
2542                                         if ((*i)->position() > distance) {
2543                                                 new_pos = (*i)->position() - distance;
2544                                         } else {
2545                                                 new_pos = 0;
2546                                         }
2547                                 }
2548
2549                                 (*i)->set_position (new_pos);
2550                                 moved = true;
2551                         }
2552                 }
2553         }
2554
2555         if (moved) {
2556                 _nudging = false;
2557                 notify_contents_changed ();
2558         }
2559
2560 }
2561
2562 bool
2563 Playlist::uses_source (boost::shared_ptr<const Source> src) const
2564 {
2565         RegionReadLock rlock (const_cast<Playlist*> (this));
2566
2567         for (set<boost::shared_ptr<Region> >::const_iterator r = all_regions.begin(); r != all_regions.end(); ++r) {
2568                 if ((*r)->uses_source (src)) {
2569                         return true;
2570                 }
2571         }
2572
2573         return false;
2574 }
2575
2576 boost::shared_ptr<Region>
2577 Playlist::find_region (const ID& id) const
2578 {
2579         RegionReadLock rlock (const_cast<Playlist*> (this));
2580
2581         /* searches all regions currently in use by the playlist */
2582
2583         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
2584                 if ((*i)->id() == id) {
2585                         return *i;
2586                 }
2587         }
2588
2589         return boost::shared_ptr<Region> ();
2590 }
2591
2592 uint32_t
2593 Playlist::region_use_count (boost::shared_ptr<Region> r) const
2594 {
2595         RegionReadLock rlock (const_cast<Playlist*> (this));
2596         uint32_t cnt = 0;
2597
2598         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
2599                 if ((*i) == r) {
2600                         cnt++;
2601                 }
2602         }
2603
2604         RegionFactory::CompoundAssociations& cassocs (RegionFactory::compound_associations());
2605         for (RegionFactory::CompoundAssociations::iterator it = cassocs.begin(); it != cassocs.end(); ++it) {
2606                 /* check if region is used in a compound */
2607                 if (it->second == r) {
2608                         /* region is referenced as 'original' of a compound */
2609                         ++cnt;
2610                         break;
2611                 }
2612                 if (r->whole_file() && r->max_source_level() > 0) {
2613                         /* region itself ia a compound.
2614                          * the compound regions are not referenced -> check regions inside compound
2615                          */
2616                         const SourceList& sl = r->sources();
2617                         for (SourceList::const_iterator s = sl.begin(); s != sl.end(); ++s) {
2618                                 boost::shared_ptr<PlaylistSource> ps = boost::dynamic_pointer_cast<PlaylistSource>(*s);
2619                                 if (!ps) continue;
2620                                 if (ps->playlist()->region_use_count(it->first)) {
2621                                         // break out of both loops
2622                                         return ++cnt;
2623                                 }
2624                         }
2625                 }
2626         }
2627         return cnt;
2628 }
2629
2630 boost::shared_ptr<Region>
2631 Playlist::region_by_id (const ID& id) const
2632 {
2633         /* searches all regions ever added to this playlist */
2634
2635         for (set<boost::shared_ptr<Region> >::const_iterator i = all_regions.begin(); i != all_regions.end(); ++i) {
2636                 if ((*i)->id() == id) {
2637                         return *i;
2638                 }
2639         }
2640         return boost::shared_ptr<Region> ();
2641 }
2642
2643 void
2644 Playlist::dump () const
2645 {
2646         boost::shared_ptr<Region> r;
2647
2648         cerr << "Playlist \"" << _name << "\" " << endl
2649              << regions.size() << " regions "
2650              << endl;
2651
2652         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
2653                 r = *i;
2654                 cerr << "  " << r->name() << " ["
2655                      << r->start() << "+" << r->length()
2656                      << "] at "
2657                      << r->position()
2658                      << " on layer "
2659                      << r->layer ()
2660                      << endl;
2661         }
2662 }
2663
2664 void
2665 Playlist::set_frozen (bool yn)
2666 {
2667         _frozen = yn;
2668 }
2669
2670 void
2671 Playlist::shuffle (boost::shared_ptr<Region> region, int dir)
2672 {
2673         bool moved = false;
2674
2675         if (region->locked()) {
2676                 return;
2677         }
2678
2679         _shuffling = true;
2680
2681         {
2682                 RegionWriteLock rlock (const_cast<Playlist*> (this));
2683
2684
2685                 if (dir > 0) {
2686
2687                         RegionList::iterator next;
2688
2689                         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
2690                                 if ((*i) == region) {
2691                                         next = i;
2692                                         ++next;
2693
2694                                         if (next != regions.end()) {
2695
2696                                                 if ((*next)->locked()) {
2697                                                         break;
2698                                                 }
2699
2700                                                 framepos_t new_pos;
2701
2702                                                 if ((*next)->position() != region->last_frame() + 1) {
2703                                                         /* they didn't used to touch, so after shuffle,
2704                                                            just have them swap positions.
2705                                                         */
2706                                                         new_pos = (*next)->position();
2707                                                 } else {
2708                                                         /* they used to touch, so after shuffle,
2709                                                            make sure they still do. put the earlier
2710                                                            region where the later one will end after
2711                                                            it is moved.
2712                                                         */
2713                                                         new_pos = region->position() + (*next)->length();
2714                                                 }
2715
2716                                                 (*next)->set_position (region->position());
2717                                                 region->set_position (new_pos);
2718
2719                                                 /* avoid a full sort */
2720
2721                                                 regions.erase (i); // removes the region from the list */
2722                                                 next++;
2723                                                 regions.insert (next, region); // adds it back after next
2724
2725                                                 moved = true;
2726                                         }
2727                                         break;
2728                                 }
2729                         }
2730                 } else {
2731
2732                         RegionList::iterator prev = regions.end();
2733
2734                         for (RegionList::iterator i = regions.begin(); i != regions.end(); prev = i, ++i) {
2735                                 if ((*i) == region) {
2736
2737                                         if (prev != regions.end()) {
2738
2739                                                 if ((*prev)->locked()) {
2740                                                         break;
2741                                                 }
2742
2743                                                 framepos_t new_pos;
2744                                                 if (region->position() != (*prev)->last_frame() + 1) {
2745                                                         /* they didn't used to touch, so after shuffle,
2746                                                            just have them swap positions.
2747                                                         */
2748                                                         new_pos = region->position();
2749                                                 } else {
2750                                                         /* they used to touch, so after shuffle,
2751                                                            make sure they still do. put the earlier
2752                                                            one where the later one will end after
2753                                                         */
2754                                                         new_pos = (*prev)->position() + region->length();
2755                                                 }
2756
2757                                                 region->set_position ((*prev)->position());
2758                                                 (*prev)->set_position (new_pos);
2759
2760                                                 /* avoid a full sort */
2761
2762                                                 regions.erase (i); // remove region
2763                                                 regions.insert (prev, region); // insert region before prev
2764
2765                                                 moved = true;
2766                                         }
2767
2768                                         break;
2769                                 }
2770                         }
2771                 }
2772         }
2773
2774         _shuffling = false;
2775
2776         if (moved) {
2777
2778                 relayer ();
2779                 notify_contents_changed();
2780         }
2781
2782 }
2783
2784 bool
2785 Playlist::region_is_shuffle_constrained (boost::shared_ptr<Region>)
2786 {
2787         RegionReadLock rlock (const_cast<Playlist*> (this));
2788
2789         if (regions.size() > 1) {
2790                 return true;
2791         }
2792
2793         return false;
2794 }
2795
2796 void
2797 Playlist::ripple (framepos_t at, framecnt_t distance, RegionList *exclude)
2798 {
2799         ripple_locked (at, distance, exclude);
2800 }
2801
2802 void
2803 Playlist::update_after_tempo_map_change ()
2804 {
2805         RegionWriteLock rlock (const_cast<Playlist*> (this));
2806         RegionList copy (regions.rlist());
2807
2808         freeze ();
2809
2810         for (RegionList::iterator i = copy.begin(); i != copy.end(); ++i) {
2811                 (*i)->update_after_tempo_map_change ();
2812         }
2813
2814         thaw ();
2815 }
2816
2817 void
2818 Playlist::foreach_region (boost::function<void(boost::shared_ptr<Region>)> s)
2819 {
2820         RegionWriteLock rl (this, false);
2821         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
2822                 s (*i);
2823         }
2824 }
2825
2826 bool
2827 Playlist::has_region_at (framepos_t const p) const
2828 {
2829         RegionReadLock (const_cast<Playlist *> (this));
2830
2831         RegionList::const_iterator i = regions.begin ();
2832         while (i != regions.end() && !(*i)->covers (p)) {
2833                 ++i;
2834         }
2835
2836         return (i != regions.end());
2837 }
2838
2839 /** Remove any region that uses a given source */
2840 void
2841 Playlist::remove_region_by_source (boost::shared_ptr<Source> s)
2842 {
2843         RegionWriteLock rl (this);
2844
2845         RegionList::iterator i = regions.begin();
2846         while (i != regions.end()) {
2847                 RegionList::iterator j = i;
2848                 ++j;
2849
2850                 if ((*i)->uses_source (s)) {
2851                         remove_region_internal (*i);
2852                 }
2853
2854                 i = j;
2855         }
2856 }
2857
2858 /** Look from a session frame time and find the start time of the next region
2859  *  which is on the top layer of this playlist.
2860  *  @param t Time to look from.
2861  *  @return Position of next top-layered region, or max_framepos if there isn't one.
2862  */
2863 framepos_t
2864 Playlist::find_next_top_layer_position (framepos_t t) const
2865 {
2866         RegionReadLock rlock (const_cast<Playlist *> (this));
2867
2868         layer_t const top = top_layer ();
2869
2870         RegionList copy = regions.rlist ();
2871         copy.sort (RegionSortByPosition ());
2872
2873         for (RegionList::const_iterator i = copy.begin(); i != copy.end(); ++i) {
2874                 if ((*i)->position() >= t && (*i)->layer() == top) {
2875                         return (*i)->position();
2876                 }
2877         }
2878
2879         return max_framepos;
2880 }
2881
2882 boost::shared_ptr<Region>
2883 Playlist::combine (const RegionList& r)
2884 {
2885         PropertyList plist;
2886         uint32_t channels = 0;
2887         uint32_t layer = 0;
2888         framepos_t earliest_position = max_framepos;
2889         vector<TwoRegions> old_and_new_regions;
2890         vector<boost::shared_ptr<Region> > originals;
2891         vector<boost::shared_ptr<Region> > copies;
2892         string parent_name;
2893         string child_name;
2894         uint32_t max_level = 0;
2895
2896         /* find the maximum depth of all the regions we're combining */
2897
2898         for (RegionList::const_iterator i = r.begin(); i != r.end(); ++i) {
2899                 max_level = max (max_level, (*i)->max_source_level());
2900         }
2901
2902         parent_name = RegionFactory::compound_region_name (name(), combine_ops(), max_level, true);
2903         child_name = RegionFactory::compound_region_name (name(), combine_ops(), max_level, false);
2904
2905         boost::shared_ptr<Playlist> pl = PlaylistFactory::create (_type, _session, parent_name, true);
2906
2907         for (RegionList::const_iterator i = r.begin(); i != r.end(); ++i) {
2908                 earliest_position = min (earliest_position, (*i)->position());
2909         }
2910
2911         /* enable this so that we do not try to create xfades etc. as we add
2912          * regions
2913          */
2914
2915         pl->in_partition = true;
2916
2917         /* sort by position then layer.
2918          * route_time_axis passes 'selected_regions' - which is not sorted.
2919          * here we need the top-most first, then every layer's region sorted by position.
2920          */
2921         RegionList sorted(r);
2922         sorted.sort(RegionSortByLayerAndPosition());
2923
2924         for (RegionList::const_iterator i = sorted.begin(); i != sorted.end(); ++i) {
2925
2926                 /* copy the region */
2927
2928                 boost::shared_ptr<Region> original_region = (*i);
2929                 boost::shared_ptr<Region> copied_region = RegionFactory::create (original_region, false);
2930
2931                 old_and_new_regions.push_back (TwoRegions (original_region,copied_region));
2932                 originals.push_back (original_region);
2933                 copies.push_back (copied_region);
2934
2935                 RegionFactory::add_compound_association (original_region, copied_region);
2936
2937                 /* make position relative to zero */
2938
2939                 pl->add_region (copied_region, original_region->position() - earliest_position);
2940                 copied_region->set_layer (original_region->layer ());
2941
2942                 /* use the maximum number of channels for any region */
2943
2944                 channels = max (channels, original_region->n_channels());
2945
2946                 /* it will go above the layer of the highest existing region */
2947
2948                 layer = max (layer, original_region->layer());
2949         }
2950
2951         pl->in_partition = false;
2952
2953         pre_combine (copies);
2954
2955         /* now create a new PlaylistSource for each channel in the new playlist */
2956
2957         SourceList sources;
2958         pair<framepos_t,framepos_t> extent = pl->get_extent();
2959
2960         for (uint32_t chn = 0; chn < channels; ++chn) {
2961                 sources.push_back (SourceFactory::createFromPlaylist (_type, _session, pl, id(), parent_name, chn, 0, extent.second, false, false));
2962
2963         }
2964
2965         /* now a new whole-file region using the list of sources */
2966
2967         plist.add (Properties::start, 0);
2968         plist.add (Properties::length, extent.second);
2969         plist.add (Properties::name, parent_name);
2970         plist.add (Properties::whole_file, true);
2971
2972         boost::shared_ptr<Region> parent_region = RegionFactory::create (sources, plist, true);
2973
2974         /* now the non-whole-file region that we will actually use in the
2975          * playlist
2976          */
2977
2978         plist.clear ();
2979         plist.add (Properties::start, 0);
2980         plist.add (Properties::length, extent.second);
2981         plist.add (Properties::name, child_name);
2982         plist.add (Properties::layer, layer+1);
2983
2984         boost::shared_ptr<Region> compound_region = RegionFactory::create (parent_region, plist, true);
2985
2986         /* remove all the selected regions from the current playlist
2987          */
2988
2989         freeze ();
2990
2991         for (RegionList::const_iterator i = r.begin(); i != r.end(); ++i) {
2992                 remove_region (*i);
2993         }
2994
2995         /* do type-specific stuff with the originals and the new compound
2996            region
2997         */
2998
2999         post_combine (originals, compound_region);
3000
3001         /* add the new region at the right location */
3002
3003         add_region (compound_region, earliest_position);
3004
3005         _combine_ops++;
3006
3007         thaw ();
3008
3009         return compound_region;
3010 }
3011
3012 void
3013 Playlist::uncombine (boost::shared_ptr<Region> target)
3014 {
3015         boost::shared_ptr<PlaylistSource> pls;
3016         boost::shared_ptr<const Playlist> pl;
3017         vector<boost::shared_ptr<Region> > originals;
3018         vector<TwoRegions> old_and_new_regions;
3019
3020         // (1) check that its really a compound region
3021
3022         if ((pls = boost::dynamic_pointer_cast<PlaylistSource>(target->source (0))) == 0) {
3023                 return;
3024         }
3025
3026         pl = pls->playlist();
3027
3028         framepos_t adjusted_start = 0; // gcc isn't smart enough
3029         framepos_t adjusted_end = 0;   // gcc isn't smart enough
3030
3031         /* the leftmost (earliest) edge of the compound region
3032            starts at zero in its source, or larger if it
3033            has been trimmed or content-scrolled.
3034
3035            the rightmost (latest) edge of the compound region
3036            relative to its source is the starting point plus
3037            the length of the region.
3038         */
3039
3040         // (2) get all the original regions
3041
3042         const RegionList& rl (pl->region_list().rlist());
3043         RegionFactory::CompoundAssociations& cassocs (RegionFactory::compound_associations());
3044         frameoffset_t move_offset = 0;
3045
3046         /* there are two possibilities here:
3047            1) the playlist that the playlist source was based on
3048            is us, so just add the originals (which belonged to
3049            us anyway) back in the right place.
3050
3051            2) the playlist that the playlist source was based on
3052            is NOT us, so we need to make copies of each of
3053            the original regions that we find, and add them
3054            instead.
3055         */
3056         bool same_playlist = (pls->original() == id());
3057
3058         for (RegionList::const_iterator i = rl.begin(); i != rl.end(); ++i) {
3059
3060                 boost::shared_ptr<Region> current (*i);
3061
3062                 RegionFactory::CompoundAssociations::iterator ca = cassocs.find (*i);
3063
3064                 if (ca == cassocs.end()) {
3065                         continue;
3066                 }
3067
3068                 boost::shared_ptr<Region> original (ca->second);
3069                 cassocs.erase(ca);
3070                 bool modified_region;
3071
3072                 if (i == rl.begin()) {
3073                         move_offset = (target->position() - original->position()) - target->start();
3074                         adjusted_start = original->position() + target->start();
3075                         adjusted_end = adjusted_start + target->length();
3076                 }
3077
3078                 if (!same_playlist) {
3079                         framepos_t pos = original->position();
3080                         /* make a copy, but don't announce it */
3081                         original = RegionFactory::create (original, false);
3082                         /* the pure copy constructor resets position() to zero,
3083                            so fix that up.
3084                         */
3085                         original->set_position (pos);
3086                 }
3087
3088                 /* check to see how the original region (in the
3089                  * playlist before compounding occured) overlaps
3090                  * with the new state of the compound region.
3091                  */
3092
3093                 original->clear_changes ();
3094                 modified_region = false;
3095
3096                 switch (original->coverage (adjusted_start, adjusted_end)) {
3097                 case Evoral::OverlapNone:
3098                         /* original region does not cover any part
3099                            of the current state of the compound region
3100                         */
3101                         continue;
3102
3103                 case Evoral::OverlapInternal:
3104                         /* overlap is just a small piece inside the
3105                          * original so trim both ends
3106                          */
3107                         original->trim_to (adjusted_start, adjusted_end - adjusted_start);
3108                         modified_region = true;
3109                         break;
3110
3111                 case Evoral::OverlapExternal:
3112                         /* overlap fully covers original, so leave it
3113                            as is
3114                         */
3115                         break;
3116
3117                 case Evoral::OverlapEnd:
3118                         /* overlap starts within but covers end,
3119                            so trim the front of the region
3120                         */
3121                         original->trim_front (adjusted_start);
3122                         modified_region = true;
3123                         break;
3124
3125                 case Evoral::OverlapStart:
3126                         /* overlap covers start but ends within, so
3127                          * trim the end of the region.
3128                          */
3129                         original->trim_end (adjusted_end);
3130                         modified_region = true;
3131                         break;
3132                 }
3133
3134                 if (move_offset) {
3135                         /* fix the position to match any movement of the compound region.
3136                          */
3137                         original->set_position (original->position() + move_offset);
3138                         modified_region = true;
3139                 }
3140
3141                 if (modified_region) {
3142                         _session.add_command (new StatefulDiffCommand (original));
3143                 }
3144
3145                 /* and add to the list of regions waiting to be
3146                  * re-inserted
3147                  */
3148
3149                 originals.push_back (original);
3150                 old_and_new_regions.push_back (TwoRegions (*i, original));
3151         }
3152
3153         pre_uncombine (originals, target);
3154
3155         in_partition = true;
3156         freeze ();
3157
3158         // (3) remove the compound region
3159
3160         remove_region (target);
3161
3162         // (4) add the constituent regions
3163
3164         for (vector<boost::shared_ptr<Region> >::iterator i = originals.begin(); i != originals.end(); ++i) {
3165                 add_region ((*i), (*i)->position());
3166                 set_layer((*i), (*i)->layer());
3167                 if (!RegionFactory::region_by_id((*i)->id())) {
3168                         RegionFactory::map_add(*i);
3169                 }
3170         }
3171
3172         in_partition = false;
3173         thaw ();
3174 }
3175
3176 void
3177 Playlist::fade_range (list<AudioRange>& ranges)
3178 {
3179          for (list<AudioRange>::iterator r = ranges.begin(); r != ranges.end(); ++r) {
3180                  for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
3181                          (*i)->fade_range ((*r).start, (*r).end);
3182                  }
3183          }
3184 }
3185
3186 uint32_t
3187 Playlist::max_source_level () const
3188 {
3189         RegionReadLock rlock (const_cast<Playlist *> (this));
3190         uint32_t lvl = 0;
3191
3192         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
3193                 lvl = max (lvl, (*i)->max_source_level());
3194         }
3195
3196         return lvl;
3197 }
3198
3199 void
3200 Playlist::set_orig_track_id (const PBD::ID& id)
3201 {
3202         _orig_track_id = id;
3203 }
3204
3205 /** Take a list of ranges, coalesce any that can be coalesced, then call
3206  *  check_crossfades for each one.
3207  */
3208 void
3209 Playlist::coalesce_and_check_crossfades (list<Evoral::Range<framepos_t> > ranges)
3210 {
3211         /* XXX: it's a shame that this coalesce algorithm also exists in
3212            TimeSelection::consolidate().
3213         */
3214
3215         /* XXX: xfade: this is implemented in Evoral::RangeList */
3216
3217 restart:
3218         for (list<Evoral::Range<framepos_t> >::iterator i = ranges.begin(); i != ranges.end(); ++i) {
3219                 for (list<Evoral::Range<framepos_t> >::iterator j = ranges.begin(); j != ranges.end(); ++j) {
3220
3221                         if (i == j) {
3222                                 continue;
3223                         }
3224
3225                         // XXX i->from can be > i->to - is this right? coverage() will return OverlapNone in this case
3226                         if (Evoral::coverage (i->from, i->to, j->from, j->to) != Evoral::OverlapNone) {
3227                                 i->from = min (i->from, j->from);
3228                                 i->to = max (i->to, j->to);
3229                                 ranges.erase (j);
3230                                 goto restart;
3231                         }
3232                 }
3233         }
3234 }
3235
3236 void
3237 Playlist::set_capture_insertion_in_progress (bool yn)
3238 {
3239         _capture_insertion_underway = yn;
3240 }