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 <boost/scoped_array.hpp>
  21
  22 #include "pbd/error.h"
  23 #include "pbd/enumwriter.h"
  24 #include "pbd/boost_debug.h"
  25
  26 #include "evoral/Curve.hpp"
  27
  28 #include "ardour/amp.h"
  29 #include "ardour/audio_buffer.h"
  30 #include "ardour/audio_diskstream.h"
  31 #include "ardour/audio_track.h"
  32 #include "ardour/audioplaylist.h"
  33 #include "ardour/audioregion.h"
  34 #include "ardour/audiosource.h"
  35 #include "ardour/buffer_set.h"
  36 #include "ardour/io_processor.h"
  37 #include "ardour/panner.h"
  38 #include "ardour/meter.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 "ardour/session_playlists.h"
  47 #include "ardour/delivery.h"
  48 #include "ardour/meter.h"
  49 #include "i18n.h"
  50
  51 using namespace std;
  52 using namespace ARDOUR;
  53 using namespace PBD;
  54
  55 AudioTrack::AudioTrack (Session& sess, string name, Route::Flag flag, TrackMode mode)
  56         : Track (sess, name, flag, mode)
  57 {
  58 }
  59
  60 AudioTrack::~AudioTrack ()
  61 {
  62 }
  63
  64 void
  65 AudioTrack::use_new_diskstream ()
  66 {
  67         AudioDiskstream::Flag dflags = AudioDiskstream::Flag (0);
  68
  69         if (_flags & Hidden) {
  70                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Hidden);
  71         } else {
  72                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Recordable);
  73         }
  74
  75         if (_mode == Destructive) {
  76                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Destructive);
  77         } else if (_mode == NonLayered){
  78                 dflags = AudioDiskstream::Flag(dflags | AudioDiskstream::NonLayered);
  79         }
  80
  81         AudioDiskstream* dsp (new AudioDiskstream (_session, name(), dflags));
  82         boost::shared_ptr<AudioDiskstream> ds (dsp);
  83
  84         ds->do_refill_with_alloc ();
  85         ds->set_block_size (_session.get_block_size ());
  86
  87         set_diskstream (ds);
  88 }
  89
  90 void
  91 AudioTrack::set_diskstream (boost::shared_ptr<Diskstream> ds)
  92 {
  93         Track::set_diskstream (ds);
  94
  95         _diskstream->set_track (this);
  96         _diskstream->set_destructive (_mode == Destructive);
  97         _diskstream->set_non_layered (_mode == NonLayered);
  98
  99         if (audio_diskstream()->deprecated_io_node) {
 100
 101                 if (!IO::connecting_legal) {
 102                         IO::ConnectingLegal.connect_same_thread (*this, boost::bind (&AudioTrack::deprecated_use_diskstream_connections, this));
 103                 } else {
 104                         deprecated_use_diskstream_connections ();
 105                 }
 106         }
 107
 108         _diskstream->set_record_enabled (false);
 109         _diskstream->monitor_input (false);
 110
 111         DiskstreamChanged (); /* EMIT SIGNAL */
 112 }
 113
 114 boost::shared_ptr<AudioDiskstream>
 115 AudioTrack::audio_diskstream() const
 116 {
 117         return boost::dynamic_pointer_cast<AudioDiskstream>(_diskstream);
 118 }
 119
 120 int
 121 AudioTrack::set_mode (TrackMode m)
 122 {
 123         if (m != _mode) {
 124
 125                 if (_diskstream->set_destructive (m == Destructive)) {
 126                         return -1;
 127                 }
 128
 129                 _diskstream->set_non_layered (m == NonLayered);
 130                 _mode = m;
 131
 132                 TrackModeChanged (); /* EMIT SIGNAL */
 133         }
 134
 135         return 0;
 136 }
 137
 138 bool
 139 AudioTrack::can_use_mode (TrackMode m, bool& bounce_required)
 140 {
 141         switch (m) {
 142         case NonLayered:
 143         case Normal:
 144                 bounce_required = false;
 145                 return true;
 146
 147         case Destructive:
 148         default:
 149                 return _diskstream->can_become_destructive (bounce_required);
 150         }
 151 }
 152
 153 int
 154 AudioTrack::deprecated_use_diskstream_connections ()
 155 {
 156         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 157
 158         if (diskstream->deprecated_io_node == 0) {
 159                 return 0;
 160         }
 161
 162         const XMLProperty* prop;
 163         XMLNode& node (*diskstream->deprecated_io_node);
 164
 165         /* don't do this more than once. */
 166
 167         diskstream->deprecated_io_node = 0;
 168
 169         if ((prop = node.property ("gain")) != 0) {
 170                 _amp->set_gain (atof (prop->value().c_str()), this);
 171         }
 172
 173         if ((prop = node.property ("input-connection")) != 0) {
 174                 boost::shared_ptr<Bundle> c = _session.bundle_by_name (prop->value());
 175
 176                 if (c == 0) {
 177                         error << string_compose(_("Unknown bundle \"%1\" listed for input of %2"), prop->value(), _name) << endmsg;
 178
 179                         if ((c = _session.bundle_by_name (_("in 1"))) == 0) {
 180                                 error << _("No input bundles available as a replacement")
 181                                 << endmsg;
 182                                 return -1;
 183                         } else {
 184                                 info << string_compose (_("Bundle %1 was not available - \"in 1\" used instead"), prop->value())
 185                                << endmsg;
 186                         }
 187                 }
 188
 189                 _input->connect_ports_to_bundle (c, this);
 190
 191         } else if ((prop = node.property ("inputs")) != 0) {
 192                 if (_input->set_ports (prop->value())) {
 193                         error << string_compose(_("improper input channel list in XML node (%1)"), prop->value()) << endmsg;
 194                         return -1;
 195                 }
 196         }
 197
 198         return 0;
 199 }
 200
 201 int
 202 AudioTrack::set_state (const XMLNode& node, int version)
 203 {
 204         return _set_state (node, version, true);
 205 }
 206
 207 int
 208 AudioTrack::_set_state (const XMLNode& node, int version, bool call_base)
 209 {
 210         const XMLProperty *prop;
 211         XMLNodeConstIterator iter;
 212
 213         if (call_base) {
 214                 if (Route::_set_state (node, version, call_base)) {
 215                         return -1;
 216                 }
 217         }
 218
 219         if ((prop = node.property (X_("mode"))) != 0) {
 220                 _mode = TrackMode (string_2_enum (prop->value(), _mode));
 221         } else {
 222                 _mode = Normal;
 223         }
 224
 225         XMLNodeList nlist;
 226         XMLNodeConstIterator niter;
 227         XMLNode *child;
 228
 229         nlist = node.children();
 230         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
 231                 child = *niter;
 232
 233                 if (child->name() == X_("recenable")) {
 234                         _rec_enable_control->set_state (*child, version);
 235                         _session.add_controllable (_rec_enable_control);
 236                 }
 237         }
 238
 239         if (version >= 3000) {
 240                 if ((child = find_named_node (node, X_("Diskstream"))) != 0) {
 241                         boost::shared_ptr<AudioDiskstream> ds (new AudioDiskstream (_session, *child));
 242                         ds->do_refill_with_alloc ();
 243                         set_diskstream (ds);
 244                 }
 245         }
 246
 247         pending_state = const_cast<XMLNode*> (&node);
 248
 249         if (_session.state_of_the_state() & Session::Loading) {
 250                 _session.StateReady.connect_same_thread (*this, boost::bind (&AudioTrack::set_state_part_two, this));
 251         } else {
 252                 set_state_part_two ();
 253         }
 254
 255         return 0;
 256 }
 257
 258 XMLNode&
 259 AudioTrack::state (bool full_state)
 260 {
 261         XMLNode& root (Route::state(full_state));
 262         XMLNode* freeze_node;
 263         char buf[64];
 264
 265         if (_freeze_record.playlist) {
 266                 XMLNode* inode;
 267
 268                 freeze_node = new XMLNode (X_("freeze-info"));
 269                 freeze_node->add_property ("playlist", _freeze_record.playlist->name());
 270                 freeze_node->add_property ("state", enum_2_string (_freeze_record.state));
 271
 272                 for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 273                         inode = new XMLNode (X_("processor"));
 274                         (*i)->id.print (buf, sizeof (buf));
 275                         inode->add_property (X_("id"), buf);
 276                         inode->add_child_copy ((*i)->state);
 277
 278                         freeze_node->add_child_nocopy (*inode);
 279                 }
 280
 281                 root.add_child_nocopy (*freeze_node);
 282         }
 283
 284         root.add_property (X_("mode"), enum_2_string (_mode));
 285         root.add_child_nocopy (_rec_enable_control->get_state());
 286         root.add_child_nocopy (_diskstream->get_state ());
 287
 288         return root;
 289 }
 290
 291 void
 292 AudioTrack::set_state_part_two ()
 293 {
 294         XMLNode* fnode;
 295         XMLProperty* prop;
 296         LocaleGuard lg (X_("POSIX"));
 297
 298         /* This is called after all session state has been restored but before
 299            have been made ports and connections are established.
 300         */
 301
 302         if (pending_state == 0) {
 303                 return;
 304         }
 305
 306         if ((fnode = find_named_node (*pending_state, X_("freeze-info"))) != 0) {
 307
 308                 _freeze_record.state = Frozen;
 309
 310                 for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 311                         delete *i;
 312                 }
 313                 _freeze_record.processor_info.clear ();
 314
 315                 if ((prop = fnode->property (X_("playlist"))) != 0) {
 316                         boost::shared_ptr<Playlist> pl = _session.playlists->by_name (prop->value());
 317                         if (pl) {
 318                                 _freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist> (pl);
 319                         } else {
 320                                 _freeze_record.playlist.reset ();
 321                                 _freeze_record.state = NoFreeze;
 322                         return;
 323                         }
 324                 }
 325
 326                 if ((prop = fnode->property (X_("state"))) != 0) {
 327                         _freeze_record.state = FreezeState (string_2_enum (prop->value(), _freeze_record.state));
 328                 }
 329
 330                 XMLNodeConstIterator citer;
 331                 XMLNodeList clist = fnode->children();
 332
 333                 for (citer = clist.begin(); citer != clist.end(); ++citer) {
 334                         if ((*citer)->name() != X_("processor")) {
 335                                 continue;
 336                         }
 337
 338                         if ((prop = (*citer)->property (X_("id"))) == 0) {
 339                                 continue;
 340                         }
 341
 342                         FreezeRecordProcessorInfo* frii = new FreezeRecordProcessorInfo (*((*citer)->children().front()),
 343                                                                                    boost::shared_ptr<Processor>());
 344                         frii->id = prop->value ();
 345                         _freeze_record.processor_info.push_back (frii);
 346                 }
 347         }
 348 }
 349
 350 int
 351 AudioTrack::roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame, int declick,
 352                   bool can_record, bool rec_monitors_input, bool& need_butler)
 353 {
 354         Glib::RWLock::ReaderLock lm (_processor_lock, Glib::TRY_LOCK);
 355         if (!lm.locked()) {
 356                 return 0;
 357         }
 358
 359         int dret;
 360         Sample* b;
 361         Sample* tmpb;
 362         nframes_t transport_frame;
 363         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 364
 365         automation_snapshot (start_frame, false);
 366
 367         if (n_outputs().n_total() == 0 && _processors.empty()) {
 368                 return 0;
 369         }
 370
 371         if (!_active) {
 372                 silence (nframes);
 373                 return 0;
 374         }
 375
 376         transport_frame = _session.transport_frame();
 377
 378         if ((nframes = check_initial_delay (nframes, transport_frame)) == 0) {
 379
 380                 /* need to do this so that the diskstream sets its
 381                    playback distance to zero, thus causing diskstream::commit
 382                    to do nothing.
 383                 */
 384                 return diskstream->process (transport_frame, 0, can_record, rec_monitors_input, need_butler);
 385         }
 386
 387         _silent = false;
 388         _amp->apply_gain_automation(false);
 389
 390         if ((dret = diskstream->process (transport_frame, nframes, can_record, rec_monitors_input, need_butler)) != 0) {
 391                 silence (nframes);
 392                 return dret;
 393         }
 394
 395         /* special condition applies */
 396
 397         if (_meter_point == MeterInput) {
 398                 _input->process_input (_meter, start_frame, end_frame, nframes);
 399         }
 400
 401         if (diskstream->record_enabled() && !can_record && !_session.config.get_auto_input()) {
 402
 403                 /* not actually recording, but we want to hear the input material anyway,
 404                    at least potentially (depending on monitoring options)
 405                  */
 406
 407                 passthru (start_frame, end_frame, nframes, false);
 408
 409         } else if ((b = diskstream->playback_buffer(0)) != 0) {
 410
 411                 /*
 412                   XXX is it true that the earlier test on n_outputs()
 413                   means that we can avoid checking it again here? i think
 414                   so, because changing the i/o configuration of an IO
 415                   requires holding the AudioEngine lock, which we hold
 416                   while in the process() tree.
 417                 */
 418
 419
 420                 /* copy the diskstream data to all output buffers */
 421
 422                 size_t limit = input_streams ().n_audio();
 423                 BufferSet& bufs = _session.get_scratch_buffers ();
 424                 const size_t blimit = bufs.count().n_audio();
 425
 426                 uint32_t n;
 427                 uint32_t i;
 428
 429                 if (limit > blimit) {
 430
 431                         /* example case: auditioner configured for stereo output,
 432                            but loaded with an 8 channel file. there are only
 433                            2 passthrough buffers, but n_process_buffers() will
 434                            return 8.
 435
 436                            arbitrary decision: map all channels in the diskstream
 437                            to the outputs available.
 438                         */
 439
 440                         float scaling = limit/blimit;
 441
 442                         for (i = 0, n = 1; i < blimit; ++i, ++n) {
 443
 444                                 /* first time through just copy a channel into
 445                                    the output buffer.
 446                                 */
 447
 448                                 Sample* bb = bufs.get_audio (i).data();
 449
 450                                 for (nframes_t xx = 0; xx < nframes; ++xx) {
 451                                         bb[xx] = b[xx] * scaling;
 452                                 }
 453
 454                                 if (n < diskstream->n_channels().n_audio()) {
 455                                         tmpb = diskstream->playback_buffer(n);
 456                                         if (tmpb!=0) {
 457                                                 b = tmpb;
 458                                         }
 459                                 }
 460                         }
 461
 462                         for (;i < limit; ++i, ++n) {
 463
 464                                 /* for all remaining channels, sum with existing
 465                                    data in the output buffers
 466                                 */
 467
 468                                 bufs.get_audio (i%blimit).accumulate_with_gain_from (b, nframes, 0, scaling);
 469
 470                                 if (n < diskstream->n_channels().n_audio()) {
 471                                         tmpb = diskstream->playback_buffer(n);
 472                                         if (tmpb!=0) {
 473                                                 b = tmpb;
 474                                         }
 475                                 }
 476
 477                         }
 478
 479                         limit = blimit;
 480
 481                 } else {
 482                         for (i = 0, n = 1; i < limit; ++i, ++n) {
 483                                 memcpy (bufs.get_audio (i).data(), b, sizeof (Sample) * nframes);
 484                                 if (n < diskstream->n_channels().n_audio()) {
 485                                         tmpb = diskstream->playback_buffer(n);
 486                                         if (tmpb!=0) {
 487                                                 b = tmpb;
 488                                         }
 489                                 }
 490                         }
 491
 492                         /* try to leave any MIDI buffers alone */
 493
 494                         ChanCount chn;
 495                         chn.set_audio (limit);
 496                         chn.set_midi (_input->n_ports().n_midi());
 497                         bufs.set_count (chn);
 498                 }
 499
 500                 /* don't waste time with automation if we're recording or we've just stopped (yes it can happen) */
 501
 502                 if (!diskstream->record_enabled() && _session.transport_rolling()) {
 503 #ifdef XXX_MOVE_THIS_TO_AMP
 504                         Glib::Mutex::Lock am (data().control_lock(), Glib::TRY_LOCK);
 505
 506                         if (am.locked() && gain_control()->automation_playback()) {
 507                                 _amp->apply_gain_automation(
 508                                                 gain_control()->list()->curve().rt_safe_get_vector (
 509                                                         start_frame, end_frame, _session.gain_automation_buffer(), nframes));
 510                         }
 511 #endif
 512                 }
 513
 514                 process_output_buffers (bufs, start_frame, end_frame, nframes, (!_session.get_record_enabled() || !Config->get_do_not_record_plugins()), declick);
 515
 516         } else {
 517                 /* problem with the diskstream; just be quiet for a bit */
 518                 silence (nframes);
 519         }
 520
 521         return 0;
 522 }
 523
 524 int
 525 AudioTrack::export_stuff (BufferSet& buffers, sframes_t start, nframes_t nframes, bool enable_processing)
 526 {
 527         boost::scoped_array<gain_t> gain_buffer (new gain_t[nframes]);
 528         boost::scoped_array<Sample> mix_buffer (new Sample[nframes]);
 529         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 530
 531         Glib::RWLock::ReaderLock rlock (_processor_lock);
 532
 533         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist());
 534         assert(apl);
 535
 536         assert(buffers.get_audio(0).capacity() >= nframes);
 537
 538         if (apl->read (buffers.get_audio(0).data(), mix_buffer.get(), gain_buffer.get(), start, nframes) != nframes) {
 539                 return -1;
 540         }
 541
 542         assert(buffers.count().n_audio() >= 1);
 543         uint32_t n=1;
 544         Sample* b = buffers.get_audio(0).data();
 545         BufferSet::audio_iterator bi = buffers.audio_begin();
 546         ++bi;
 547         for ( ; bi != buffers.audio_end(); ++bi, ++n) {
 548                 if (n < diskstream->n_channels().n_audio()) {
 549                         if (apl->read (bi->data(), mix_buffer.get(), gain_buffer.get(), start, nframes, n) != nframes) {
 550                                 return -1;
 551                         }
 552                         b = bi->data();
 553                 }
 554                 else {
 555                         /* duplicate last across remaining buffers */
 556                         memcpy (bi->data(), b, sizeof (Sample) * nframes);
 557                 }
 558         }
 559
 560         // If no processing is required, there's no need to go any further.
 561         if (!enable_processing) {
 562                 return 0;
 563         }
 564
 565         /* note: only run processors during export. other layers in the machinery
 566            will already have checked that there are no external port processors.
 567            Also, don't run deliveries that write to real output ports, and don't
 568            run meters.
 569         */
 570
 571         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 572                 boost::shared_ptr<Processor> processor = boost::dynamic_pointer_cast<Processor> (*i);
 573                 boost::shared_ptr<Delivery> delivery = boost::dynamic_pointer_cast<Delivery> (*i);
 574                 boost::shared_ptr<PeakMeter> meter = boost::dynamic_pointer_cast<PeakMeter> (*i);
 575
 576                 if (processor && (!delivery || !Delivery::role_requires_output_ports (delivery->role())) && !meter) {
 577                         processor->run (buffers, start, start+nframes, nframes, true);
 578                 }
 579         }
 580
 581         return 0;
 582 }
 583
 584 boost::shared_ptr<Region>
 585 AudioTrack::bounce (InterThreadInfo& itt)
 586 {
 587         vector<boost::shared_ptr<Source> > srcs;
 588         return _session.write_one_track (*this, _session.current_start_frame(), _session.current_end_frame(), false, srcs, itt);
 589 }
 590
 591 boost::shared_ptr<Region>
 592 AudioTrack::bounce_range (nframes_t start, nframes_t end, InterThreadInfo& itt, bool enable_processing)
 593 {
 594         vector<boost::shared_ptr<Source> > srcs;
 595         return _session.write_one_track (*this, start, end, false, srcs, itt, enable_processing);
 596 }
 597
 598 void
 599 AudioTrack::freeze_me (InterThreadInfo& itt)
 600 {
 601         vector<boost::shared_ptr<Source> > srcs;
 602         string new_playlist_name;
 603         boost::shared_ptr<Playlist> new_playlist;
 604         string dir;
 605         string region_name;
 606         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 607
 608         if ((_freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist())) == 0) {
 609                 return;
 610         }
 611
 612         uint32_t n = 1;
 613
 614         while (n < (UINT_MAX-1)) {
 615
 616                 string candidate;
 617
 618                 candidate = string_compose ("<F%2>%1", _freeze_record.playlist->name(), n);
 619
 620                 if (_session.playlists->by_name (candidate) == 0) {
 621                         new_playlist_name = candidate;
 622                         break;
 623                 }
 624
 625                 ++n;
 626
 627         }
 628
 629         if (n == (UINT_MAX-1)) {
 630           error << string_compose (X_("There are too many frozen versions of playlist \"%1\""
 631                             " to create another one"), _freeze_record.playlist->name())
 632                << endmsg;
 633                 return;
 634         }
 635
 636         boost::shared_ptr<Region> res;
 637
 638         if ((res = _session.write_one_track (*this, _session.current_start_frame(), _session.current_end_frame(), true, srcs, itt)) == 0) {
 639                 return;
 640         }
 641
 642         _freeze_record.processor_info.clear ();
 643
 644         {
 645                 Glib::RWLock::ReaderLock lm (_processor_lock);
 646
 647                 for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
 648
 649                         boost::shared_ptr<Processor> processor;
 650
 651                         if ((processor = boost::dynamic_pointer_cast<Processor>(*r)) != 0) {
 652
 653                                 FreezeRecordProcessorInfo* frii  = new FreezeRecordProcessorInfo ((*r)->get_state(), processor);
 654
 655                                 frii->id = processor->id();
 656
 657                                 _freeze_record.processor_info.push_back (frii);
 658
 659                                 /* now deactivate the processor */
 660
 661                                 processor->deactivate ();
 662                                 _session.set_dirty ();
 663                         }
 664                 }
 665         }
 666
 667         new_playlist = PlaylistFactory::create (DataType::AUDIO, _session, new_playlist_name, false);
 668
 669         /* XXX need main outs automation state _freeze_record.pan_automation_state = _mainpanner->automation_state(); */
 670
 671         region_name = new_playlist_name;
 672
 673         /* create a new region from all filesources, keep it private */
 674
 675         PropertyList plist;
 676
 677         plist.add (Properties::start, 0);
 678         plist.add (Properties::length, srcs[0]->length(srcs[0]->timeline_position()));
 679         plist.add (Properties::name, region_name);
 680         plist.add (Properties::whole_file, true);
 681
 682         boost::shared_ptr<Region> region (RegionFactory::create (srcs, plist, false));
 683
 684         new_playlist->set_orig_diskstream_id (_diskstream->id());
 685         new_playlist->add_region (region, _session.current_start_frame());
 686         new_playlist->set_frozen (true);
 687         region->set_locked (true);
 688
 689         diskstream->use_playlist (boost::dynamic_pointer_cast<AudioPlaylist>(new_playlist));
 690         diskstream->set_record_enabled (false);
 691
 692         /* reset stuff that has already been accounted for in the freeze process */
 693
 694         set_gain (1.0, this);
 695         _amp->gain_control()->set_automation_state (Off);
 696         /* XXX need to use _main_outs _panner->set_automation_state (Off); */
 697
 698         _freeze_record.state = Frozen;
 699         FreezeChange(); /* EMIT SIGNAL */
 700 }
 701
 702 void
 703 AudioTrack::unfreeze ()
 704 {
 705         if (_freeze_record.playlist) {
 706                 audio_diskstream()->use_playlist (_freeze_record.playlist);
 707
 708                 {
 709                         Glib::RWLock::ReaderLock lm (_processor_lock); // should this be a write lock? jlc
 710                         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 711                                 for (vector<FreezeRecordProcessorInfo*>::iterator ii = _freeze_record.processor_info.begin(); ii != _freeze_record.processor_info.end(); ++ii) {
 712                                         if ((*ii)->id == (*i)->id()) {
 713                                                 (*i)->set_state (((*ii)->state), Stateful::current_state_version);
 714                                                 break;
 715                                         }
 716                                 }
 717                         }
 718                 }
 719
 720                 _freeze_record.playlist.reset ();
 721                 /* XXX need to use _main_outs _panner->set_automation_state (_freeze_record.pan_automation_state); */
 722         }
 723
 724         _freeze_record.state = UnFrozen;
 725         FreezeChange (); /* EMIT SIGNAL */
 726 }
 727
 728 boost::shared_ptr<AudioFileSource>
 729 AudioTrack::write_source (uint32_t n)
 730 {
 731         boost::shared_ptr<AudioDiskstream> ds = boost::dynamic_pointer_cast<AudioDiskstream> (_diskstream);
 732         assert (ds);
 733         return ds->write_source (n);
 734 }
 735