libs/ardour/audio_track.cc

   1 /*
   2     Copyright (C) 2002 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 <sigc++/retype.h>
  21 #include <sigc++/retype_return.h>
  22 #include <sigc++/bind.h>
  23
  24 #include "pbd/error.h"
  25 #include "pbd/enumwriter.h"
  26
  27 #include "evoral/Curve.hpp"
  28
  29 #include "ardour/amp.h"
  30 #include "ardour/audio_buffer.h"
  31 #include "ardour/audio_diskstream.h"
  32 #include "ardour/audio_track.h"
  33 #include "ardour/audioplaylist.h"
  34 #include "ardour/audioregion.h"
  35 #include "ardour/audiosource.h"
  36 #include "ardour/buffer_set.h"
  37 #include "ardour/io_processor.h"
  38 #include "ardour/panner.h"
  39 #include "ardour/playlist_factory.h"
  40 #include "ardour/plugin_insert.h"
  41 #include "ardour/processor.h"
  42 #include "ardour/region_factory.h"
  43 #include "ardour/route_group_specialized.h"
  44 #include "ardour/session.h"
  45 #include "ardour/utils.h"
  46 #include "i18n.h"
  47
  48 using namespace std;
  49 using namespace ARDOUR;
  50 using namespace PBD;
  51
  52 AudioTrack::AudioTrack (Session& sess, string name, Route::Flag flag, TrackMode mode)
  53         : Track (sess, name, flag, mode)
  54 {
  55         use_new_diskstream ();
  56 }
  57
  58 AudioTrack::AudioTrack (Session& sess, const XMLNode& node)
  59         : Track (sess, node)
  60 {
  61         _set_state (node, false);
  62 }
  63
  64 AudioTrack::~AudioTrack ()
  65 {
  66 }
  67
  68 void
  69 AudioTrack::use_new_diskstream ()
  70 {
  71         AudioDiskstream::Flag dflags = AudioDiskstream::Flag (0);
  72
  73         if (_flags & Hidden) {
  74                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Hidden);
  75         } else {
  76                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Recordable);
  77         }
  78
  79         if (_mode == Destructive) {
  80                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Destructive);
  81         } else if (_mode == NonLayered){
  82                 dflags = AudioDiskstream::Flag(dflags | AudioDiskstream::NonLayered);
  83         }
  84
  85
  86         boost::shared_ptr<AudioDiskstream> ds (new AudioDiskstream (_session, name(), dflags));
  87
  88         _session.add_diskstream (ds);
  89
  90         set_diskstream (boost::dynamic_pointer_cast<AudioDiskstream> (ds), this);
  91 }
  92
  93 int
  94 AudioTrack::set_mode (TrackMode m)
  95 {
  96         if (m != _mode) {
  97
  98                 if (_diskstream->set_destructive (m == Destructive)) {
  99                         return -1;
 100                 }
 101
 102                 _diskstream->set_non_layered (m == NonLayered);
 103                 _mode = m;
 104
 105                 TrackModeChanged (); /* EMIT SIGNAL */
 106         }
 107
 108         return 0;
 109 }
 110
 111 bool
 112 AudioTrack::can_use_mode (TrackMode m, bool& bounce_required)
 113 {
 114         switch (m) {
 115         case NonLayered:
 116         case Normal:
 117                 bounce_required = false;
 118                 return true;
 119
 120         case Destructive:
 121         default:
 122                 return _diskstream->can_become_destructive (bounce_required);
 123         }
 124 }
 125
 126 int
 127 AudioTrack::deprecated_use_diskstream_connections ()
 128 {
 129         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 130
 131         if (diskstream->deprecated_io_node == 0) {
 132                 return 0;
 133         }
 134
 135         const XMLProperty* prop;
 136         XMLNode& node (*diskstream->deprecated_io_node);
 137
 138         /* don't do this more than once. */
 139
 140         diskstream->deprecated_io_node = 0;
 141
 142         if ((prop = node.property ("gain")) != 0) {
 143                 set_gain (atof (prop->value().c_str()), this);
 144                 _gain = _gain_control->user_float();
 145         }
 146
 147         if ((prop = node.property ("input-connection")) != 0) {
 148                 boost::shared_ptr<Bundle> c = _session.bundle_by_name (prop->value());
 149
 150                 if (c == 0) {
 151                         error << string_compose(_("Unknown bundle \"%1\" listed for input of %2"), prop->value(), _name) << endmsg;
 152
 153                         if ((c = _session.bundle_by_name (_("in 1"))) == 0) {
 154                                 error << _("No input bundles available as a replacement")
 155                                 << endmsg;
 156                                 return -1;
 157                         } else {
 158                                 info << string_compose (_("Bundle %1 was not available - \"in 1\" used instead"), prop->value())
 159                                << endmsg;
 160                         }
 161                 }
 162
 163                 connect_input_ports_to_bundle (c, this);
 164
 165         } else if ((prop = node.property ("inputs")) != 0) {
 166                 if (set_inputs (prop->value())) {
 167                         error << string_compose(_("improper input channel list in XML node (%1)"), prop->value()) << endmsg;
 168                         return -1;
 169                 }
 170         }
 171
 172         return 0;
 173 }
 174
 175 int
 176 AudioTrack::set_diskstream (boost::shared_ptr<AudioDiskstream> ds, void *src)
 177 {
 178         _diskstream = ds;
 179         _diskstream->set_io (*this);
 180         _diskstream->set_destructive (_mode == Destructive);
 181         _diskstream->set_non_layered (_mode == NonLayered);
 182
 183         if (audio_diskstream()->deprecated_io_node) {
 184
 185                 if (!connecting_legal) {
 186                         ConnectingLegal.connect (mem_fun (*this, &AudioTrack::deprecated_use_diskstream_connections));
 187                 } else {
 188                         deprecated_use_diskstream_connections ();
 189                 }
 190         }
 191
 192         _diskstream->set_record_enabled (false);
 193         _diskstream->monitor_input (false);
 194
 195         ic_connection.disconnect();
 196         ic_connection = input_changed.connect (mem_fun (*_diskstream, &Diskstream::handle_input_change));
 197
 198         DiskstreamChanged (); /* EMIT SIGNAL */
 199
 200         return 0;
 201 }
 202
 203 int
 204 AudioTrack::use_diskstream (string name)
 205 {
 206         boost::shared_ptr<AudioDiskstream> dstream;
 207
 208         if ((dstream = boost::dynamic_pointer_cast<AudioDiskstream>(_session.diskstream_by_name (name))) == 0) {
 209                 error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), name) << endmsg;
 210                 return -1;
 211         }
 212
 213         return set_diskstream (dstream, this);
 214 }
 215
 216 int
 217 AudioTrack::use_diskstream (const PBD::ID& id)
 218 {
 219         boost::shared_ptr<AudioDiskstream> dstream;
 220
 221         if ((dstream = boost::dynamic_pointer_cast<AudioDiskstream> (_session.diskstream_by_id (id))) == 0) {
 222                 error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), id) << endmsg;
 223                 return -1;
 224         }
 225
 226         return set_diskstream (dstream, this);
 227 }
 228
 229 boost::shared_ptr<AudioDiskstream>
 230 AudioTrack::audio_diskstream() const
 231 {
 232         return boost::dynamic_pointer_cast<AudioDiskstream>(_diskstream);
 233 }
 234
 235 int
 236 AudioTrack::set_state (const XMLNode& node)
 237 {
 238         return _set_state (node, true);
 239 }
 240
 241 int
 242 AudioTrack::_set_state (const XMLNode& node, bool call_base)
 243 {
 244         const XMLProperty *prop;
 245         XMLNodeConstIterator iter;
 246
 247         if (call_base) {
 248                 if (Route::_set_state (node, call_base)) {
 249                         return -1;
 250                 }
 251         }
 252
 253         if ((prop = node.property (X_("mode"))) != 0) {
 254                 _mode = TrackMode (string_2_enum (prop->value(), _mode));
 255         } else {
 256                 _mode = Normal;
 257         }
 258
 259         if ((prop = node.property ("diskstream-id")) == 0) {
 260
 261                 /* some old sessions use the diskstream name rather than the ID */
 262
 263                 if ((prop = node.property ("diskstream")) == 0) {
 264                         fatal << _("programming error: AudioTrack given state without diskstream!") << endmsg;
 265                         /*NOTREACHED*/
 266                         return -1;
 267                 }
 268
 269                 if (use_diskstream (prop->value())) {
 270                         return -1;
 271                 }
 272
 273         } else {
 274
 275                 PBD::ID id (prop->value());
 276                 PBD::ID zero ("0");
 277
 278                 /* this wierd hack is used when creating tracks from a template. there isn't
 279                    a particularly good time to interpose between setting the first part of
 280                    the track state (notably Route::set_state() and the track mode), and the
 281                    second part (diskstream stuff). So, we have a special ID for the diskstream
 282                    that means "you should create a new diskstream here, not look for
 283                    an old one.
 284                 */
 285
 286                 if (id == zero) {
 287                         use_new_diskstream ();
 288                 } else if (use_diskstream (id)) {
 289                         return -1;
 290                 }
 291         }
 292
 293
 294         XMLNodeList nlist;
 295         XMLNodeConstIterator niter;
 296         XMLNode *child;
 297
 298         nlist = node.children();
 299         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
 300                 child = *niter;
 301
 302                 if (child->name() == X_("recenable")) {
 303                         _rec_enable_control->set_state (*child);
 304                         _session.add_controllable (_rec_enable_control);
 305                 }
 306         }
 307
 308         pending_state = const_cast<XMLNode*> (&node);
 309
 310         if (_session.state_of_the_state() & Session::Loading) {
 311                 _session.StateReady.connect (mem_fun (*this, &AudioTrack::set_state_part_two));
 312         } else {
 313                 set_state_part_two ();
 314         }
 315
 316         return 0;
 317 }
 318
 319 XMLNode&
 320 AudioTrack::state(bool full_state)
 321 {
 322         XMLNode& root (Route::state(full_state));
 323         XMLNode* freeze_node;
 324         char buf[64];
 325
 326         if (_freeze_record.playlist) {
 327                 XMLNode* inode;
 328
 329                 freeze_node = new XMLNode (X_("freeze-info"));
 330                 freeze_node->add_property ("playlist", _freeze_record.playlist->name());
 331                 freeze_node->add_property ("state", enum_2_string (_freeze_record.state));
 332
 333                 for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 334                         inode = new XMLNode (X_("processor"));
 335                         (*i)->id.print (buf, sizeof (buf));
 336                         inode->add_property (X_("id"), buf);
 337                         inode->add_child_copy ((*i)->state);
 338
 339                         freeze_node->add_child_nocopy (*inode);
 340                 }
 341
 342                 root.add_child_nocopy (*freeze_node);
 343         }
 344
 345         /* Alignment: act as a proxy for the diskstream */
 346
 347         XMLNode* align_node = new XMLNode (X_("Alignment"));
 348         AlignStyle as = _diskstream->alignment_style ();
 349         align_node->add_property (X_("style"), enum_2_string (as));
 350         root.add_child_nocopy (*align_node);
 351
 352         root.add_property (X_("mode"), enum_2_string (_mode));
 353
 354         /* we don't return diskstream state because we don't
 355            own the diskstream exclusively. control of the diskstream
 356            state is ceded to the Session, even if we create the
 357            diskstream.
 358         */
 359
 360         _diskstream->id().print (buf, sizeof (buf));
 361         root.add_property ("diskstream-id", buf);
 362
 363         root.add_child_nocopy (_rec_enable_control->get_state());
 364
 365         return root;
 366 }
 367
 368 void
 369 AudioTrack::set_state_part_two ()
 370 {
 371         XMLNode* fnode;
 372         XMLProperty* prop;
 373         LocaleGuard lg (X_("POSIX"));
 374
 375         /* This is called after all session state has been restored but before
 376            have been made ports and connections are established.
 377         */
 378
 379         if (pending_state == 0) {
 380                 return;
 381         }
 382
 383         if ((fnode = find_named_node (*pending_state, X_("freeze-info"))) != 0) {
 384
 385                 _freeze_record.state = Frozen;
 386
 387                 for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 388                         delete *i;
 389                 }
 390                 _freeze_record.processor_info.clear ();
 391
 392                 if ((prop = fnode->property (X_("playlist"))) != 0) {
 393                         boost::shared_ptr<Playlist> pl = _session.playlist_by_name (prop->value());
 394                         if (pl) {
 395                                 _freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist> (pl);
 396                         } else {
 397                                 _freeze_record.playlist.reset ();
 398                                 _freeze_record.state = NoFreeze;
 399                         return;
 400                         }
 401                 }
 402
 403                 if ((prop = fnode->property (X_("state"))) != 0) {
 404                         _freeze_record.state = FreezeState (string_2_enum (prop->value(), _freeze_record.state));
 405                 }
 406
 407                 XMLNodeConstIterator citer;
 408                 XMLNodeList clist = fnode->children();
 409
 410                 for (citer = clist.begin(); citer != clist.end(); ++citer) {
 411                         if ((*citer)->name() != X_("processor")) {
 412                                 continue;
 413                         }
 414
 415                         if ((prop = (*citer)->property (X_("id"))) == 0) {
 416                                 continue;
 417                         }
 418
 419                         FreezeRecordProcessorInfo* frii = new FreezeRecordProcessorInfo (*((*citer)->children().front()),
 420                                                                                    boost::shared_ptr<Processor>());
 421                         frii->id = prop->value ();
 422                         _freeze_record.processor_info.push_back (frii);
 423                 }
 424         }
 425
 426         /* Alignment: act as a proxy for the diskstream */
 427
 428         if ((fnode = find_named_node (*pending_state, X_("Alignment"))) != 0) {
 429
 430                 if ((prop = fnode->property (X_("style"))) != 0) {
 431
 432                         /* fix for older sessions from before EnumWriter */
 433
 434                         string pstr;
 435
 436                         if (prop->value() == "capture") {
 437                                 pstr = "CaptureTime";
 438                         } else if (prop->value() == "existing") {
 439                                 pstr = "ExistingMaterial";
 440                         } else {
 441                                 pstr = prop->value();
 442                         }
 443
 444                         AlignStyle as = AlignStyle (string_2_enum (pstr, as));
 445                         _diskstream->set_persistent_align_style (as);
 446                 }
 447         }
 448         return;
 449 }
 450
 451 int
 452 AudioTrack::roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame, int declick,
 453                   bool can_record, bool rec_monitors_input)
 454 {
 455         int dret;
 456         Sample* b;
 457         Sample* tmpb;
 458         nframes_t transport_frame;
 459         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 460
 461         {
 462                 Glib::RWLock::ReaderLock lm (_processor_lock, Glib::TRY_LOCK);
 463                 if (lm.locked()) {
 464                         // automation snapshot can also be called from the non-rt context
 465                         // and it uses the redirect list, so we take the lock out here
 466                         automation_snapshot (start_frame, false);
 467                 }
 468         }
 469
 470
 471         if (n_outputs().n_total() == 0 && _processors.empty()) {
 472                 return 0;
 473         }
 474
 475         if (!_active) {
 476                 silence (nframes);
 477                 return 0;
 478         }
 479
 480         transport_frame = _session.transport_frame();
 481
 482         prepare_inputs (nframes);
 483
 484         if ((nframes = check_initial_delay (nframes, transport_frame)) == 0) {
 485
 486                 /* need to do this so that the diskstream sets its
 487                    playback distance to zero, thus causing diskstream::commit
 488                    to do nothing.
 489                 */
 490                 return diskstream->process (transport_frame, 0, can_record, rec_monitors_input);
 491         }
 492
 493         _silent = false;
 494         _amp->apply_gain_automation(false);
 495
 496         if ((dret = diskstream->process (transport_frame, nframes, can_record, rec_monitors_input)) != 0) {
 497                 silence (nframes);
 498                 return dret;
 499         }
 500
 501         /* special condition applies */
 502
 503         if (_meter_point == MeterInput) {
 504                 just_meter_input (start_frame, end_frame, nframes);
 505         }
 506
 507         if (diskstream->record_enabled() && !can_record && !_session.config.get_auto_input()) {
 508
 509                 /* not actually recording, but we want to hear the input material anyway,
 510                    at least potentially (depending on monitoring options)
 511                  */
 512
 513                 passthru (start_frame, end_frame, nframes, false);
 514
 515         } else if ((b = diskstream->playback_buffer(0)) != 0) {
 516
 517                 /*
 518                   XXX is it true that the earlier test on n_outputs()
 519                   means that we can avoid checking it again here? i think
 520                   so, because changing the i/o configuration of an IO
 521                   requires holding the AudioEngine lock, which we hold
 522                   while in the process() tree.
 523                 */
 524
 525
 526                 /* copy the diskstream data to all output buffers */
 527
 528                 size_t limit = n_process_buffers().n_audio();
 529                 BufferSet& bufs = _session.get_scratch_buffers ();
 530                 const size_t blimit = bufs.count().n_audio();
 531
 532                 uint32_t n;
 533                 uint32_t i;
 534
 535                 if (limit > blimit) {
 536
 537                         /* example case: auditioner configured for stereo output,
 538                            but loaded with an 8 channel file. there are only
 539                            2 passthrough buffers, but n_process_buffers() will
 540                            return 8.
 541
 542                            arbitrary decision: map all channels in the diskstream
 543                            to the outputs available.
 544                         */
 545
 546                         float scaling = limit/blimit;
 547
 548                         for (i = 0, n = 1; i < blimit; ++i, ++n) {
 549
 550                                 /* first time through just copy a channel into
 551                                    the output buffer.
 552                                 */
 553
 554                                 Sample* bb = bufs.get_audio (i).data();
 555
 556                                 for (nframes_t xx = 0; xx < nframes; ++xx) {
 557                                         bb[xx] = b[xx] * scaling;
 558                                 }
 559
 560                                 if (n < diskstream->n_channels().n_audio()) {
 561                                         tmpb = diskstream->playback_buffer(n);
 562                                         if (tmpb!=0) {
 563                                                 b = tmpb;
 564                                         }
 565                                 }
 566                         }
 567
 568                         for (;i < limit; ++i, ++n) {
 569
 570                                 /* for all remaining channels, sum with existing
 571                                    data in the output buffers
 572                                 */
 573
 574                                 bufs.get_audio (i%blimit).accumulate_with_gain_from (b, nframes, 0, scaling);
 575
 576                                 if (n < diskstream->n_channels().n_audio()) {
 577                                         tmpb = diskstream->playback_buffer(n);
 578                                         if (tmpb!=0) {
 579                                                 b = tmpb;
 580                                         }
 581                                 }
 582
 583                         }
 584
 585                         limit = blimit;
 586
 587                 } else {
 588                         for (i = 0, n = 1; i < blimit; ++i, ++n) {
 589                                 memcpy (bufs.get_audio (i).data(), b, sizeof (Sample) * nframes);
 590                                 if (n < diskstream->n_channels().n_audio()) {
 591                                         tmpb = diskstream->playback_buffer(n);
 592                                         if (tmpb!=0) {
 593                                                 b = tmpb;
 594                                         }
 595                                 }
 596                         }
 597                 }
 598
 599                 /* don't waste time with automation if we're recording or we've just stopped (yes it can happen) */
 600
 601                 if (!diskstream->record_enabled() && _session.transport_rolling()) {
 602                         Glib::Mutex::Lock am (data().control_lock(), Glib::TRY_LOCK);
 603
 604                         if (am.locked() && gain_control()->automation_playback()) {
 605                                 _amp->apply_gain_automation(
 606                                                 gain_control()->list()->curve().rt_safe_get_vector (
 607                                                         start_frame, end_frame, _session.gain_automation_buffer(), nframes));
 608                         }
 609                 }
 610
 611                 process_output_buffers (bufs, start_frame, end_frame, nframes, (!_session.get_record_enabled() || !Config->get_do_not_record_plugins()), declick);
 612
 613         } else {
 614                 /* problem with the diskstream; just be quiet for a bit */
 615                 silence (nframes);
 616         }
 617
 618         return 0;
 619 }
 620
 621 int
 622 AudioTrack::export_stuff (BufferSet& buffers, sframes_t start, nframes_t nframes, bool enable_processing)
 623 {
 624         gain_t  gain_buffer[nframes];
 625         float   mix_buffer[nframes];
 626         ProcessorList::iterator i;
 627         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 628
 629         Glib::RWLock::ReaderLock rlock (_processor_lock);
 630
 631         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist());
 632         assert(apl);
 633
 634         assert(buffers.get_audio(0).capacity() >= nframes);
 635
 636         if (apl->read (buffers.get_audio(0).data(), mix_buffer, gain_buffer, start, nframes) != nframes) {
 637                 return -1;
 638         }
 639
 640         assert(buffers.count().n_audio() >= 1);
 641         uint32_t n=1;
 642         Sample* b = buffers.get_audio(0).data();
 643         BufferSet::audio_iterator bi = buffers.audio_begin();
 644         ++bi;
 645         for ( ; bi != buffers.audio_end(); ++bi, ++n) {
 646                 if (n < diskstream->n_channels().n_audio()) {
 647                         if (apl->read (bi->data(), mix_buffer, gain_buffer, start, nframes, n) != nframes) {
 648                                 return -1;
 649                         }
 650                         b = bi->data();
 651                 }
 652                 else {
 653                         /* duplicate last across remaining buffers */
 654                         memcpy (bi->data(), b, sizeof (Sample) * nframes);
 655                 }
 656         }
 657
 658         // If no processing is required, there's no need to go any further.
 659         if (!enable_processing) {
 660                 return 0;
 661         }
 662
 663         /* note: only run processors during export. other layers in the machinery
 664            will already have checked that there are no external port processors.
 665         */
 666
 667         for (i = _processors.begin(); i != _processors.end(); ++i) {
 668                 boost::shared_ptr<Processor> processor;
 669                 if ((processor = boost::dynamic_pointer_cast<Processor>(*i)) != 0) {
 670                         processor->run_in_place (buffers, start, start+nframes, nframes);
 671                 }
 672         }
 673
 674         return 0;
 675 }
 676
 677 boost::shared_ptr<Region>
 678 AudioTrack::bounce (InterThreadInfo& itt)
 679 {
 680         vector<boost::shared_ptr<Source> > srcs;
 681         return _session.write_one_track (*this, _session.current_start_frame(), _session.current_end_frame(), false, srcs, itt);
 682 }
 683
 684 boost::shared_ptr<Region>
 685 AudioTrack::bounce_range (nframes_t start, nframes_t end, InterThreadInfo& itt, bool enable_processing)
 686 {
 687         vector<boost::shared_ptr<Source> > srcs;
 688         return _session.write_one_track (*this, start, end, false, srcs, itt, enable_processing);
 689 }
 690
 691 void
 692 AudioTrack::freeze (InterThreadInfo& itt)
 693 {
 694         vector<boost::shared_ptr<Source> > srcs;
 695         string new_playlist_name;
 696         boost::shared_ptr<Playlist> new_playlist;
 697         string dir;
 698         string region_name;
 699         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 700
 701         if ((_freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist())) == 0) {
 702                 return;
 703         }
 704
 705         uint32_t n = 1;
 706
 707         while (n < (UINT_MAX-1)) {
 708
 709                 string candidate;
 710
 711                 candidate = string_compose ("<F%2>%1", _freeze_record.playlist->name(), n);
 712
 713                 if (_session.playlist_by_name (candidate) == 0) {
 714                         new_playlist_name = candidate;
 715                         break;
 716                 }
 717
 718                 ++n;
 719
 720         }
 721
 722         if (n == (UINT_MAX-1)) {
 723           error << string_compose (X_("There are too many frozen versions of playlist \"%1\""
 724                             " to create another one"), _freeze_record.playlist->name())
 725                << endmsg;
 726                 return;
 727         }
 728
 729         boost::shared_ptr<Region> res;
 730
 731         if ((res = _session.write_one_track (*this, _session.current_start_frame(), _session.current_end_frame(), true, srcs, itt)) == 0) {
 732                 return;
 733         }
 734
 735         _freeze_record.processor_info.clear ();
 736
 737         {
 738                 Glib::RWLock::ReaderLock lm (_processor_lock);
 739
 740                 for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
 741
 742                         boost::shared_ptr<Processor> processor;
 743
 744                         if ((processor = boost::dynamic_pointer_cast<Processor>(*r)) != 0) {
 745
 746                                 FreezeRecordProcessorInfo* frii  = new FreezeRecordProcessorInfo ((*r)->get_state(), processor);
 747
 748                                 frii->id = processor->id();
 749
 750                                 _freeze_record.processor_info.push_back (frii);
 751
 752                                 /* now deactivate the processor */
 753
 754                                 processor->deactivate ();
 755                                 _session.set_dirty ();
 756                         }
 757                 }
 758         }
 759
 760         new_playlist = PlaylistFactory::create (DataType::AUDIO, _session, new_playlist_name, false);
 761
 762         _freeze_record.gain = _gain;
 763         _freeze_record.gain_automation_state = _gain_control->automation_state();
 764         _freeze_record.pan_automation_state = _panner->automation_state();
 765
 766         region_name = new_playlist_name;
 767
 768         /* create a new region from all filesources, keep it private */
 769
 770         boost::shared_ptr<Region> region (RegionFactory::create (srcs, 0,
 771                         srcs[0]->length(srcs[0]->timeline_position()),
 772                         region_name, 0,
 773                         (Region::Flag) (Region::WholeFile|Region::DefaultFlags),
 774                         false));
 775
 776         new_playlist->set_orig_diskstream_id (diskstream->id());
 777         new_playlist->add_region (region, _session.current_start_frame());
 778         new_playlist->set_frozen (true);
 779         region->set_locked (true);
 780
 781         diskstream->use_playlist (boost::dynamic_pointer_cast<AudioPlaylist>(new_playlist));
 782         diskstream->set_record_enabled (false);
 783
 784         /* reset stuff that has already been accounted for in the freeze process */
 785
 786         set_gain (1.0, this);
 787         _gain_control->set_automation_state (Off);
 788         _panner->set_automation_state (Off);
 789
 790         _freeze_record.state = Frozen;
 791         FreezeChange(); /* EMIT SIGNAL */
 792 }
 793
 794 void
 795 AudioTrack::unfreeze ()
 796 {
 797         if (_freeze_record.playlist) {
 798                 audio_diskstream()->use_playlist (_freeze_record.playlist);
 799
 800                 {
 801                         Glib::RWLock::ReaderLock lm (_processor_lock); // should this be a write lock? jlc
 802                         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 803                                 for (vector<FreezeRecordProcessorInfo*>::iterator ii = _freeze_record.processor_info.begin(); ii != _freeze_record.processor_info.end(); ++ii) {
 804                                         if ((*ii)->id == (*i)->id()) {
 805                                                 (*i)->set_state (((*ii)->state));
 806                                                 break;
 807                                         }
 808                                 }
 809                         }
 810                 }
 811
 812                 _freeze_record.playlist.reset ();
 813                 set_gain (_freeze_record.gain, this);
 814                 _gain_control->set_automation_state (_freeze_record.gain_automation_state);
 815                 _panner->set_automation_state (_freeze_record.pan_automation_state);
 816         }
 817
 818         _freeze_record.state = UnFrozen;
 819         FreezeChange (); /* EMIT SIGNAL */
 820 }
 821