libs/ardour/audio_playlist.cc

   1 /*
   2     Copyright (C) 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 <algorithm>
  21
  22 #include <cstdlib>
  23
  24 #include "ardour/types.h"
  25 #include "ardour/debug.h"
  26 #include "ardour/configuration.h"
  27 #include "ardour/audioplaylist.h"
  28 #include "ardour/audioregion.h"
  29 #include "ardour/crossfade.h"
  30 #include "ardour/session.h"
  31 #include "pbd/enumwriter.h"
  32
  33 #include "i18n.h"
  34
  35 using namespace ARDOUR;
  36 using namespace std;
  37 using namespace PBD;
  38
  39 namespace ARDOUR {
  40         namespace Properties {
  41                 PBD::PropertyDescriptor<bool> crossfades;
  42         }
  43 }
  44
  45 void
  46 AudioPlaylist::make_property_quarks ()
  47 {
  48         Properties::crossfades.property_id = g_quark_from_static_string (X_("crossfades"));
  49         DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for crossfades = %1\n", Properties::crossfades.property_id));
  50 }
  51
  52 CrossfadeListProperty::CrossfadeListProperty (AudioPlaylist& pl)
  53         : SequenceProperty<std::list<boost::shared_ptr<Crossfade> > > (Properties::crossfades.property_id, boost::bind (&AudioPlaylist::update, &pl, _1))
  54         , _playlist (pl)
  55 {
  56
  57 }
  58
  59 CrossfadeListProperty::CrossfadeListProperty (CrossfadeListProperty const & p)
  60         : PBD::SequenceProperty<std::list<boost::shared_ptr<Crossfade> > > (p)
  61         , _playlist (p._playlist)
  62 {
  63
  64 }
  65
  66
  67 CrossfadeListProperty *
  68 CrossfadeListProperty::create () const
  69 {
  70         return new CrossfadeListProperty (_playlist);
  71 }
  72
  73 CrossfadeListProperty *
  74 CrossfadeListProperty::clone () const
  75 {
  76         return new CrossfadeListProperty (*this);
  77 }
  78
  79 void
  80 CrossfadeListProperty::get_content_as_xml (boost::shared_ptr<Crossfade> xfade, XMLNode & node) const
  81 {
  82         /* Crossfades are not written to any state when they are no
  83            longer in use, so we must write their state here.
  84         */
  85
  86         XMLNode& c = xfade->get_state ();
  87         node.add_child_nocopy (c);
  88 }
  89
  90 boost::shared_ptr<Crossfade>
  91 CrossfadeListProperty::get_content_from_xml (XMLNode const & node) const
  92 {
  93         XMLNodeList const c = node.children ();
  94         assert (c.size() == 1);
  95         return boost::shared_ptr<Crossfade> (new Crossfade (_playlist, *c.front()));
  96 }
  97
  98
  99 AudioPlaylist::AudioPlaylist (Session& session, const XMLNode& node, bool hidden)
 100         : Playlist (session, node, DataType::AUDIO, hidden)
 101         , _crossfades (*this)
 102 {
 103 #ifndef NDEBUG
 104         const XMLProperty* prop = node.property("type");
 105         assert(!prop || DataType(prop->value()) == DataType::AUDIO);
 106 #endif
 107
 108         add_property (_crossfades);
 109
 110         in_set_state++;
 111         set_state (node, Stateful::loading_state_version);
 112         in_set_state--;
 113 }
 114
 115 AudioPlaylist::AudioPlaylist (Session& session, string name, bool hidden)
 116         : Playlist (session, name, DataType::AUDIO, hidden)
 117         , _crossfades (*this)
 118 {
 119         add_property (_crossfades);
 120 }
 121
 122 AudioPlaylist::AudioPlaylist (boost::shared_ptr<const AudioPlaylist> other, string name, bool hidden)
 123         : Playlist (other, name, hidden)
 124         , _crossfades (*this)
 125 {
 126         add_property (_crossfades);
 127
 128         RegionList::const_iterator in_o  = other->regions.begin();
 129         RegionList::iterator in_n = regions.begin();
 130
 131         while (in_o != other->regions.end()) {
 132                 boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(*in_o);
 133
 134                 // We look only for crossfades which begin with the current region, so we don't get doubles
 135                 for (Crossfades::const_iterator xfades = other->_crossfades.begin(); xfades != other->_crossfades.end(); ++xfades) {
 136                         if ((*xfades)->in() == ar) {
 137                                 // We found one! Now copy it!
 138
 139                                 RegionList::const_iterator out_o = other->regions.begin();
 140                                 RegionList::const_iterator out_n = regions.begin();
 141
 142                                 while (out_o != other->regions.end()) {
 143
 144                                         boost::shared_ptr<AudioRegion>ar2 = boost::dynamic_pointer_cast<AudioRegion>(*out_o);
 145
 146                                         if ((*xfades)->out() == ar2) {
 147                                                 boost::shared_ptr<AudioRegion>in  = boost::dynamic_pointer_cast<AudioRegion>(*in_n);
 148                                                 boost::shared_ptr<AudioRegion>out = boost::dynamic_pointer_cast<AudioRegion>(*out_n);
 149                                                 boost::shared_ptr<Crossfade> new_fade = boost::shared_ptr<Crossfade> (new Crossfade (*xfades, in, out));
 150                                                 add_crossfade(new_fade);
 151                                                 break;
 152                                         }
 153
 154                                         out_o++;
 155                                         out_n++;
 156                                 }
 157 //                              cerr << "HUH!? second region in the crossfade not found!" << endl;
 158                         }
 159                 }
 160
 161                 in_o++;
 162                 in_n++;
 163         }
 164 }
 165
 166 AudioPlaylist::AudioPlaylist (boost::shared_ptr<const AudioPlaylist> other, framepos_t start, framecnt_t cnt, string name, bool hidden)
 167         : Playlist (other, start, cnt, name, hidden)
 168         , _crossfades (*this)
 169 {
 170         add_property (_crossfades);
 171
 172         /* this constructor does NOT notify others (session) */
 173 }
 174
 175 AudioPlaylist::~AudioPlaylist ()
 176 {
 177         _crossfades.clear ();
 178 }
 179
 180 struct RegionSortByLayer {
 181     bool operator() (boost::shared_ptr<Region> a, boost::shared_ptr<Region> b) {
 182             return a->layer() < b->layer();
 183     }
 184 };
 185
 186 ARDOUR::framecnt_t
 187 AudioPlaylist::read (Sample *buf, Sample *mixdown_buffer, float *gain_buffer, framepos_t start,
 188                      framecnt_t cnt, unsigned chan_n)
 189 {
 190         framecnt_t ret = cnt;
 191
 192         /* optimizing this memset() away involves a lot of conditionals
 193            that may well cause more of a hit due to cache misses
 194            and related stuff than just doing this here.
 195
 196            it would be great if someone could measure this
 197            at some point.
 198
 199            one way or another, parts of the requested area
 200            that are not written to by Region::region_at()
 201            for all Regions that cover the area need to be
 202            zeroed.
 203         */
 204
 205         memset (buf, 0, sizeof (Sample) * cnt);
 206
 207         /* this function is never called from a realtime thread, so
 208            its OK to block (for short intervals).
 209         */
 210
 211         Glib::RecMutex::Lock rm (region_lock);
 212
 213         framepos_t const end = start + cnt - 1;
 214         framecnt_t read_frames = 0;
 215         framecnt_t skip_frames = 0;
 216         _read_data_count = 0;
 217
 218         _read_data_count = 0;
 219
 220         RegionList* rlist = regions_to_read (start, start+cnt);
 221
 222         if (rlist->empty()) {
 223                 delete rlist;
 224                 return cnt;
 225         }
 226
 227         map<uint32_t,vector<boost::shared_ptr<Region> > > relevant_regions;
 228         map<uint32_t,vector<boost::shared_ptr<Crossfade> > > relevant_xfades;
 229         vector<uint32_t> relevant_layers;
 230
 231         for (RegionList::iterator i = rlist->begin(); i != rlist->end(); ++i) {
 232                 if ((*i)->coverage (start, end) != OverlapNone) {
 233                         relevant_regions[(*i)->layer()].push_back (*i);
 234                         relevant_layers.push_back ((*i)->layer());
 235                 }
 236         }
 237
 238         for (Crossfades::iterator i = _crossfades.begin(); i != _crossfades.end(); ++i) {
 239                 if ((*i)->coverage (start, end) != OverlapNone) {
 240                         relevant_xfades[(*i)->upper_layer()].push_back (*i);
 241                 }
 242         }
 243
 244 //      RegionSortByLayer layer_cmp;
 245 //      relevant_regions.sort (layer_cmp);
 246
 247         /* XXX this whole per-layer approach is a hack that
 248            should be removed once Crossfades become
 249            CrossfadeRegions and we just grab a list of relevant
 250            regions and call read_at() on all of them.
 251         */
 252
 253         sort (relevant_layers.begin(), relevant_layers.end());
 254
 255         for (vector<uint32_t>::iterator l = relevant_layers.begin(); l != relevant_layers.end(); ++l) {
 256
 257                 vector<boost::shared_ptr<Region> > r (relevant_regions[*l]);
 258                 vector<boost::shared_ptr<Crossfade> >& x (relevant_xfades[*l]);
 259
 260
 261                 for (vector<boost::shared_ptr<Region> >::iterator i = r.begin(); i != r.end(); ++i) {
 262                         boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(*i);
 263                         DEBUG_TRACE (DEBUG::AudioPlayback, string_compose ("read from region %1\n", ar->name()));
 264                         assert(ar);
 265                         ar->read_at (buf, mixdown_buffer, gain_buffer, start, cnt, chan_n, read_frames, skip_frames);
 266                         _read_data_count += ar->read_data_count();
 267                 }
 268
 269                 for (vector<boost::shared_ptr<Crossfade> >::iterator i = x.begin(); i != x.end(); ++i) {
 270                         (*i)->read_at (buf, mixdown_buffer, gain_buffer, start, cnt, chan_n);
 271
 272                         /* don't JACK up _read_data_count, since its the same data as we just
 273                            read from the regions, and the OS should handle that for us.
 274                         */
 275                 }
 276         }
 277
 278         delete rlist;
 279         return ret;
 280 }
 281
 282
 283 void
 284 AudioPlaylist::remove_dependents (boost::shared_ptr<Region> region)
 285 {
 286         boost::shared_ptr<AudioRegion> r = boost::dynamic_pointer_cast<AudioRegion> (region);
 287
 288         if (in_set_state) {
 289                 return;
 290         }
 291
 292         if (r == 0) {
 293                 fatal << _("programming error: non-audio Region passed to remove_overlap in audio playlist")
 294                       << endmsg;
 295                 return;
 296         }
 297
 298         for (Crossfades::iterator i = _crossfades.begin(); i != _crossfades.end(); ) {
 299
 300                 if ((*i)->involves (r)) {
 301                         i = _crossfades.erase (i);
 302                 } else {
 303                         ++i;
 304                 }
 305         }
 306 }
 307
 308
 309 void
 310 AudioPlaylist::flush_notifications (bool from_undo)
 311 {
 312         Playlist::flush_notifications (from_undo);
 313
 314         if (in_flush) {
 315                 return;
 316         }
 317
 318         in_flush = true;
 319
 320         Crossfades::iterator a;
 321         for (a = _pending_xfade_adds.begin(); a != _pending_xfade_adds.end(); ++a) {
 322                 NewCrossfade (*a); /* EMIT SIGNAL */
 323         }
 324
 325         _pending_xfade_adds.clear ();
 326
 327         in_flush = false;
 328 }
 329
 330 void
 331 AudioPlaylist::refresh_dependents (boost::shared_ptr<Region> r)
 332 {
 333         boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(r);
 334         set<boost::shared_ptr<Crossfade> > updated;
 335
 336         if (ar == 0) {
 337                 return;
 338         }
 339
 340         for (Crossfades::iterator x = _crossfades.begin(); x != _crossfades.end();) {
 341
 342                 Crossfades::iterator tmp;
 343
 344                 tmp = x;
 345                 ++tmp;
 346
 347                 /* only update them once */
 348
 349                 if ((*x)->involves (ar)) {
 350
 351                         pair<set<boost::shared_ptr<Crossfade> >::iterator, bool> const u = updated.insert (*x);
 352
 353                         if (u.second) {
 354                                 /* x was successfully inserted into the set, so it has not already been updated */
 355                                 try {
 356                                         (*x)->refresh ();
 357                                 }
 358
 359                                 catch (Crossfade::NoCrossfadeHere& err) {
 360                                         // relax, Invalidated during refresh
 361                                 }
 362                         }
 363                 }
 364
 365                 x = tmp;
 366         }
 367 }
 368
 369 void
 370 AudioPlaylist::finalize_split_region (boost::shared_ptr<Region> o, boost::shared_ptr<Region> l, boost::shared_ptr<Region> r)
 371 {
 372         boost::shared_ptr<AudioRegion> orig  = boost::dynamic_pointer_cast<AudioRegion>(o);
 373         boost::shared_ptr<AudioRegion> left  = boost::dynamic_pointer_cast<AudioRegion>(l);
 374         boost::shared_ptr<AudioRegion> right = boost::dynamic_pointer_cast<AudioRegion>(r);
 375
 376         for (Crossfades::iterator x = _crossfades.begin(); x != _crossfades.end();) {
 377                 Crossfades::iterator tmp;
 378                 tmp = x;
 379                 ++tmp;
 380
 381                 boost::shared_ptr<Crossfade> fade;
 382
 383                 if ((*x)->_in == orig) {
 384                         if (! (*x)->covers(right->position())) {
 385                                 fade = boost::shared_ptr<Crossfade> (new Crossfade (*x, left, (*x)->_out));
 386                         } else {
 387                                 // Overlap, the crossfade is copied on the left side of the right region instead
 388                                 fade = boost::shared_ptr<Crossfade> (new Crossfade (*x, right, (*x)->_out));
 389                         }
 390                 }
 391
 392                 if ((*x)->_out == orig) {
 393                         if (! (*x)->covers(right->position())) {
 394                                 fade = boost::shared_ptr<Crossfade> (new Crossfade (*x, (*x)->_in, right));
 395                         } else {
 396                                 // Overlap, the crossfade is copied on the right side of the left region instead
 397                                 fade = boost::shared_ptr<Crossfade> (new Crossfade (*x, (*x)->_in, left));
 398                         }
 399                 }
 400
 401                 if (fade) {
 402                         _crossfades.remove (*x);
 403                         add_crossfade (fade);
 404                 }
 405                 x = tmp;
 406         }
 407 }
 408
 409 void
 410 AudioPlaylist::check_dependents (boost::shared_ptr<Region> r, bool norefresh)
 411 {
 412         boost::shared_ptr<AudioRegion> other;
 413         boost::shared_ptr<AudioRegion> region;
 414         boost::shared_ptr<AudioRegion> top;
 415         boost::shared_ptr<AudioRegion> bottom;
 416         boost::shared_ptr<Crossfade>   xfade;
 417         RegionList*  touched_regions = 0;
 418
 419         if (in_set_state || in_partition) {
 420                 return;
 421         }
 422
 423         if ((region = boost::dynamic_pointer_cast<AudioRegion> (r)) == 0) {
 424                 fatal << _("programming error: non-audio Region tested for overlap in audio playlist")
 425                       << endmsg;
 426                 return;
 427         }
 428
 429         if (!norefresh) {
 430                 refresh_dependents (r);
 431         }
 432
 433
 434         if (!_session.config.get_auto_xfade()) {
 435                 return;
 436         }
 437
 438         for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
 439                 other = boost::dynamic_pointer_cast<AudioRegion> (*i);
 440
 441                 if (other == region) {
 442                         continue;
 443                 }
 444
 445                 if (other->muted() || region->muted()) {
 446                         continue;
 447                 }
 448
 449                 if (other->position() == r->position() && other->length() == r->length()) {
 450                         /* precise overlay of two regions - no xfade */
 451                         continue;
 452                 }
 453
 454                 if (other->layer() < region->layer()) {
 455                         top = region;
 456                         bottom = other;
 457                 } else {
 458                         top = other;
 459                         bottom = region;
 460                 }
 461
 462                 if (!top->opaque()) {
 463                         continue;
 464                 }
 465
 466                 OverlapType c = top->coverage (bottom->position(), bottom->last_frame());
 467
 468                 delete touched_regions;
 469                 touched_regions = 0;
 470
 471                 try {
 472                         framecnt_t xfade_length;
 473                         switch (c) {
 474                         case OverlapNone:
 475                                 break;
 476
 477                         case OverlapInternal:
 478                                  /* {=============== top  =============}
 479                                   *     [ ----- bottom  ------- ]
 480                                   */
 481                                 break;
 482
 483                         case OverlapExternal:
 484
 485                                 /*     [ -------- top ------- ]
 486                                  * {=========== bottom =============}
 487                                  */
 488
 489                                 /* to avoid discontinuities at the region boundaries of an internal
 490                                    overlap (this region is completely within another), we create
 491                                    two hidden crossfades at each boundary. this is not dependent
 492                                    on the auto-xfade option, because we require it as basic
 493                                    audio engineering.
 494                                 */
 495
 496                                 xfade_length = min ((framecnt_t) 720, top->length());
 497
 498                                 if (top_region_at (top->first_frame()) == top) {
 499
 500                                         xfade = boost::shared_ptr<Crossfade> (new Crossfade (top, bottom, xfade_length, top->first_frame(), StartOfIn));
 501                                         add_crossfade (xfade);
 502                                 }
 503
 504                                 if (top_region_at (top->last_frame() - 1) == top) {
 505
 506                                         /*
 507                                            only add a fade out if there is no region on top of the end of 'top' (which
 508                                            would cover it).
 509                                         */
 510
 511                                         xfade = boost::shared_ptr<Crossfade> (new Crossfade (bottom, top, xfade_length, top->last_frame() - xfade_length, EndOfOut));
 512                                         add_crossfade (xfade);
 513                                 }
 514                                 break;
 515                         case OverlapStart:
 516
 517                                 /*                   { ==== top ============ }
 518                                  *   [---- bottom -------------------]
 519                                  */
 520
 521                                 if (_session.config.get_xfade_model() == FullCrossfade) {
 522                                         touched_regions = regions_touched (top->first_frame(), bottom->last_frame());
 523                                         if (touched_regions->size() <= 2) {
 524                                                 xfade = boost::shared_ptr<Crossfade> (new Crossfade (region, other, _session.config.get_xfade_model(), _session.config.get_xfades_active()));
 525                                                 add_crossfade (xfade);
 526                                         }
 527                                 } else {
 528
 529                                         touched_regions = regions_touched (top->first_frame(),
 530                                                                            top->first_frame() + min ((framecnt_t) _session.config.get_short_xfade_seconds() * _session.frame_rate(),
 531                                                                                                      top->length()));
 532                                         if (touched_regions->size() <= 2) {
 533                                                 xfade = boost::shared_ptr<Crossfade> (new Crossfade (region, other, _session.config.get_xfade_model(), _session.config.get_xfades_active()));
 534                                                 add_crossfade (xfade);
 535                                         }
 536                                 }
 537                                 break;
 538                         case OverlapEnd:
 539
 540
 541                                 /* [---- top ------------------------]
 542                                  *                { ==== bottom ============ }
 543                                  */
 544
 545                                 if (_session.config.get_xfade_model() == FullCrossfade) {
 546
 547                                         touched_regions = regions_touched (bottom->first_frame(), top->last_frame());
 548                                         if (touched_regions->size() <= 2) {
 549                                                 xfade = boost::shared_ptr<Crossfade> (new Crossfade (region, other,
 550                                                                                                      _session.config.get_xfade_model(), _session.config.get_xfades_active()));
 551                                                 add_crossfade (xfade);
 552                                         }
 553
 554                                 } else {
 555                                         touched_regions = regions_touched (bottom->first_frame(),
 556                                                                            bottom->first_frame() + min ((framecnt_t)_session.config.get_short_xfade_seconds() * _session.frame_rate(),
 557                                                                                                         bottom->length()));
 558                                         if (touched_regions->size() <= 2) {
 559                                                 xfade = boost::shared_ptr<Crossfade> (new Crossfade (region, other, _session.config.get_xfade_model(), _session.config.get_xfades_active()));
 560                                                 add_crossfade (xfade);
 561                                         }
 562                                 }
 563                                 break;
 564                         default:
 565                                 xfade = boost::shared_ptr<Crossfade> (new Crossfade (region, other,
 566                                                                                      _session.config.get_xfade_model(), _session.config.get_xfades_active()));
 567                                 add_crossfade (xfade);
 568                         }
 569                 }
 570
 571                 catch (failed_constructor& err) {
 572                         continue;
 573                 }
 574
 575                 catch (Crossfade::NoCrossfadeHere& err) {
 576                         continue;
 577                 }
 578
 579         }
 580
 581         delete touched_regions;
 582 }
 583
 584 void
 585 AudioPlaylist::add_crossfade (boost::shared_ptr<Crossfade> xfade)
 586 {
 587         Crossfades::iterator ci;
 588
 589         for (ci = _crossfades.begin(); ci != _crossfades.end(); ++ci) {
 590                 if (*(*ci) == *xfade) { // Crossfade::operator==()
 591                         break;
 592                 }
 593         }
 594
 595         if (ci != _crossfades.end()) {
 596                 // it will just go away
 597         } else {
 598                 _crossfades.push_back (xfade);
 599
 600                 xfade->Invalidated.connect_same_thread (*this, boost::bind (&AudioPlaylist::crossfade_invalidated, this, _1));
 601                 xfade->PropertyChanged.connect_same_thread (*this, boost::bind (&AudioPlaylist::crossfade_changed, this, _1));
 602
 603                 notify_crossfade_added (xfade);
 604         }
 605 }
 606
 607 void AudioPlaylist::notify_crossfade_added (boost::shared_ptr<Crossfade> x)
 608 {
 609         if (g_atomic_int_get(&block_notifications)) {
 610                 _pending_xfade_adds.insert (_pending_xfade_adds.end(), x);
 611         } else {
 612                 NewCrossfade (x); /* EMIT SIGNAL */
 613         }
 614 }
 615
 616 void
 617 AudioPlaylist::crossfade_invalidated (boost::shared_ptr<Region> r)
 618 {
 619         Crossfades::iterator i;
 620         boost::shared_ptr<Crossfade> xfade = boost::dynamic_pointer_cast<Crossfade> (r);
 621
 622         xfade->in()->resume_fade_in ();
 623         xfade->out()->resume_fade_out ();
 624
 625         if ((i = find (_crossfades.begin(), _crossfades.end(), xfade)) != _crossfades.end()) {
 626                 _crossfades.erase (i);
 627         }
 628 }
 629
 630 int
 631 AudioPlaylist::set_state (const XMLNode& node, int version)
 632 {
 633         XMLNode *child;
 634         XMLNodeList nlist;
 635         XMLNodeConstIterator niter;
 636
 637         in_set_state++;
 638
 639         Playlist::set_state (node, version);
 640
 641         freeze ();
 642
 643         nlist = node.children();
 644
 645         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
 646
 647                 child = *niter;
 648
 649                 if (child->name() != "Crossfade") {
 650                         continue;
 651                 }
 652
 653                 try {
 654                         boost::shared_ptr<Crossfade> xfade = boost::shared_ptr<Crossfade> (new Crossfade (*((const Playlist *)this), *child));
 655                         _crossfades.push_back (xfade);
 656                         xfade->Invalidated.connect_same_thread (*this, boost::bind (&AudioPlaylist::crossfade_invalidated, this, _1));
 657                         xfade->PropertyChanged.connect_same_thread (*this, boost::bind (&AudioPlaylist::crossfade_changed, this, _1));
 658                         NewCrossfade(xfade);
 659                 }
 660
 661                 catch (failed_constructor& err) {
 662                         //      cout << string_compose (_("could not create crossfade object in playlist %1"),
 663                         //        _name)
 664                         //    << endl;
 665                         continue;
 666                 }
 667         }
 668
 669         thaw ();
 670         in_set_state--;
 671
 672         return 0;
 673 }
 674
 675 void
 676 AudioPlaylist::clear (bool with_signals)
 677 {
 678         _crossfades.clear ();
 679         Playlist::clear (with_signals);
 680 }
 681
 682 XMLNode&
 683 AudioPlaylist::state (bool full_state)
 684 {
 685         XMLNode& node = Playlist::state (full_state);
 686
 687         if (full_state) {
 688                 for (Crossfades::iterator i = _crossfades.begin(); i != _crossfades.end(); ++i) {
 689                         node.add_child_nocopy ((*i)->get_state());
 690                 }
 691         }
 692
 693         return node;
 694 }
 695
 696 void
 697 AudioPlaylist::dump () const
 698 {
 699         boost::shared_ptr<Region>r;
 700         boost::shared_ptr<Crossfade> x;
 701
 702         cerr << "Playlist \"" << _name << "\" " << endl
 703              << regions.size() << " regions "
 704              << _crossfades.size() << " crossfades"
 705              << endl;
 706
 707         for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
 708                 r = *i;
 709                 cerr << "  " << r->name() << " @ " << r << " ["
 710                      << r->start() << "+" << r->length()
 711                      << "] at "
 712                      << r->position()
 713                      << " on layer "
 714                      << r->layer ()
 715                      << endl;
 716         }
 717
 718         for (Crossfades::const_iterator i = _crossfades.begin(); i != _crossfades.end(); ++i) {
 719                 x = *i;
 720                 cerr << "  xfade ["
 721                      << x->out()->name()
 722                      << ','
 723                      << x->in()->name()
 724                      << " @ "
 725                      << x->position()
 726                      << " length = "
 727                      << x->length ()
 728                      << " active ? "
 729                      << (x->active() ? "yes" : "no")
 730                      << endl;
 731         }
 732 }
 733
 734 bool
 735 AudioPlaylist::destroy_region (boost::shared_ptr<Region> region)
 736 {
 737         boost::shared_ptr<AudioRegion> r = boost::dynamic_pointer_cast<AudioRegion> (region);
 738
 739         if (!r) {
 740                 return false;
 741         }
 742
 743         bool changed = false;
 744         Crossfades::iterator c, ctmp;
 745         set<boost::shared_ptr<Crossfade> > unique_xfades;
 746
 747         {
 748                 RegionLock rlock (this);
 749
 750                 for (RegionList::iterator i = regions.begin(); i != regions.end(); ) {
 751
 752                         RegionList::iterator tmp = i;
 753                         ++tmp;
 754
 755                         if ((*i) == region) {
 756                                 regions.erase (i);
 757                                 changed = true;
 758                         }
 759
 760                         i = tmp;
 761                 }
 762
 763                 for (set<boost::shared_ptr<Region> >::iterator x = all_regions.begin(); x != all_regions.end(); ) {
 764
 765                         set<boost::shared_ptr<Region> >::iterator xtmp = x;
 766                         ++xtmp;
 767
 768                         if ((*x) == region) {
 769                                 all_regions.erase (x);
 770                                 changed = true;
 771                         }
 772
 773                         x = xtmp;
 774                 }
 775
 776                 region->set_playlist (boost::shared_ptr<Playlist>());
 777         }
 778
 779         for (c = _crossfades.begin(); c != _crossfades.end(); ) {
 780                 ctmp = c;
 781                 ++ctmp;
 782
 783                 if ((*c)->involves (r)) {
 784                         unique_xfades.insert (*c);
 785                         _crossfades.erase (c);
 786                 }
 787
 788                 c = ctmp;
 789         }
 790
 791         if (changed) {
 792                 /* overload this, it normally means "removed", not destroyed */
 793                 notify_region_removed (region);
 794         }
 795
 796         return changed;
 797 }
 798
 799 void
 800 AudioPlaylist::crossfade_changed (const PropertyChange&)
 801 {
 802         if (in_flush || in_set_state) {
 803                 return;
 804         }
 805
 806         /* XXX is there a loop here? can an xfade change not happen
 807            due to a playlist change? well, sure activation would
 808            be an example. maybe we should check the type of change
 809            that occured.
 810         */
 811
 812         notify_contents_changed ();
 813 }
 814
 815 bool
 816 AudioPlaylist::region_changed (const PropertyChange& what_changed, boost::shared_ptr<Region> region)
 817 {
 818         if (in_flush || in_set_state) {
 819                 return false;
 820         }
 821
 822         PropertyChange our_interests;
 823
 824         our_interests.add (Properties::fade_in_active);
 825         our_interests.add (Properties::fade_out_active);
 826         our_interests.add (Properties::scale_amplitude);
 827         our_interests.add (Properties::envelope_active);
 828         our_interests.add (Properties::envelope);
 829         our_interests.add (Properties::fade_in);
 830         our_interests.add (Properties::fade_out);
 831
 832         bool parent_wants_notify;
 833
 834         parent_wants_notify = Playlist::region_changed (what_changed, region);
 835
 836         if (parent_wants_notify || (what_changed.contains (our_interests))) {
 837                 notify_contents_changed ();
 838         }
 839
 840         return true;
 841 }
 842
 843 void
 844 AudioPlaylist::crossfades_at (framepos_t frame, Crossfades& clist)
 845 {
 846         RegionLock rlock (this);
 847
 848         for (Crossfades::iterator i = _crossfades.begin(); i != _crossfades.end(); ++i) {
 849                 framepos_t const start = (*i)->position ();
 850                 framepos_t const end = start + (*i)->overlap_length(); // not length(), important difference
 851
 852                 if (frame >= start && frame <= end) {
 853                         clist.push_back (*i);
 854                 }
 855         }
 856 }
 857
 858 void
 859 AudioPlaylist::foreach_crossfade (boost::function<void (boost::shared_ptr<Crossfade>)> s)
 860 {
 861         RegionLock rl (this, false);
 862         for (Crossfades::iterator i = _crossfades.begin(); i != _crossfades.end(); ++i) {
 863                 s (*i);
 864         }
 865 }
 866
 867 void
 868 AudioPlaylist::update (const CrossfadeListProperty::ChangeRecord& change)
 869 {
 870         for (CrossfadeListProperty::ChangeContainer::const_iterator i = change.added.begin(); i != change.added.end(); ++i) {
 871                 add_crossfade (*i);
 872         }
 873
 874         /* don't remove crossfades here; they will be dealt with by the dependency code */
 875 }
 876
 877 boost::shared_ptr<Crossfade>
 878 AudioPlaylist::find_crossfade (const PBD::ID& id) const
 879 {
 880         Crossfades::const_iterator i = _crossfades.begin ();
 881         while (i != _crossfades.end() && (*i)->id() != id) {
 882                 ++i;
 883         }
 884
 885         if (i == _crossfades.end()) {
 886                 return boost::shared_ptr<Crossfade> ();
 887         }
 888
 889         return *i;
 890 }