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/port_insert.h"
  42 #include "ardour/processor.h"
  43 #include "ardour/region_factory.h"
  44 #include "ardour/route_group_specialized.h"
  45 #include "ardour/session.h"
  46 #include "ardour/utils.h"
  47 #include "ardour/session_playlists.h"
  48 #include "ardour/delivery.h"
  49 #include "ardour/meter.h"
  50 #include "i18n.h"
  51
  52 using namespace std;
  53 using namespace ARDOUR;
  54 using namespace PBD;
  55
  56 AudioTrack::AudioTrack (Session& sess, string name, Route::Flag flag, TrackMode mode)
  57         : Track (sess, name, flag, mode)
  58 {
  59 }
  60
  61 AudioTrack::~AudioTrack ()
  62 {
  63 }
  64
  65 boost::shared_ptr<Diskstream>
  66 AudioTrack::create_diskstream ()
  67 {
  68         AudioDiskstream::Flag dflags = AudioDiskstream::Flag (0);
  69
  70         if (_flags & Hidden) {
  71                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Hidden);
  72         } else {
  73                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Recordable);
  74         }
  75
  76         if (_mode == Destructive) {
  77                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Destructive);
  78         } else if (_mode == NonLayered){
  79                 dflags = AudioDiskstream::Flag(dflags | AudioDiskstream::NonLayered);
  80         }
  81
  82         return boost::shared_ptr<AudioDiskstream> (new AudioDiskstream (_session, name(), dflags));
  83 }
  84
  85 void
  86 AudioTrack::set_diskstream (boost::shared_ptr<Diskstream> ds)
  87 {
  88         Track::set_diskstream (ds);
  89
  90         _diskstream->set_track (this);
  91         _diskstream->set_destructive (_mode == Destructive);
  92         _diskstream->set_non_layered (_mode == NonLayered);
  93
  94         if (audio_diskstream()->deprecated_io_node) {
  95
  96                 if (!IO::connecting_legal) {
  97                         IO::ConnectingLegal.connect_same_thread (*this, boost::bind (&AudioTrack::deprecated_use_diskstream_connections, this));
  98                 } else {
  99                         deprecated_use_diskstream_connections ();
 100                 }
 101         }
 102
 103         _diskstream->set_record_enabled (false);
 104         _diskstream->request_jack_monitors_input (false);
 105
 106         DiskstreamChanged (); /* EMIT SIGNAL */
 107 }
 108
 109 boost::shared_ptr<AudioDiskstream>
 110 AudioTrack::audio_diskstream() const
 111 {
 112         return boost::dynamic_pointer_cast<AudioDiskstream>(_diskstream);
 113 }
 114
 115 int
 116 AudioTrack::set_mode (TrackMode m)
 117 {
 118         if (m != _mode) {
 119
 120                 if (_diskstream->set_destructive (m == Destructive)) {
 121                         return -1;
 122                 }
 123
 124                 _diskstream->set_non_layered (m == NonLayered);
 125                 _mode = m;
 126
 127                 TrackModeChanged (); /* EMIT SIGNAL */
 128         }
 129
 130         return 0;
 131 }
 132
 133 bool
 134 AudioTrack::can_use_mode (TrackMode m, bool& bounce_required)
 135 {
 136         switch (m) {
 137         case NonLayered:
 138         case Normal:
 139                 bounce_required = false;
 140                 return true;
 141
 142         case Destructive:
 143         default:
 144                 return _diskstream->can_become_destructive (bounce_required);
 145         }
 146 }
 147
 148 int
 149 AudioTrack::deprecated_use_diskstream_connections ()
 150 {
 151         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 152
 153         if (diskstream->deprecated_io_node == 0) {
 154                 return 0;
 155         }
 156
 157         const XMLProperty* prop;
 158         XMLNode& node (*diskstream->deprecated_io_node);
 159
 160         /* don't do this more than once. */
 161
 162         diskstream->deprecated_io_node = 0;
 163
 164         if ((prop = node.property ("gain")) != 0) {
 165                 _amp->set_gain (atof (prop->value().c_str()), this);
 166         }
 167
 168         if ((prop = node.property ("input-connection")) != 0) {
 169                 boost::shared_ptr<Bundle> c = _session.bundle_by_name (prop->value());
 170
 171                 if (c == 0) {
 172                         error << string_compose(_("Unknown bundle \"%1\" listed for input of %2"), prop->value(), _name) << endmsg;
 173
 174                         if ((c = _session.bundle_by_name (_("in 1"))) == 0) {
 175                                 error << _("No input bundles available as a replacement")
 176                                 << endmsg;
 177                                 return -1;
 178                         } else {
 179                                 info << string_compose (_("Bundle %1 was not available - \"in 1\" used instead"), prop->value())
 180                                << endmsg;
 181                         }
 182                 }
 183
 184                 _input->connect_ports_to_bundle (c, this);
 185
 186         } else if ((prop = node.property ("inputs")) != 0) {
 187                 if (_input->set_ports (prop->value())) {
 188                         error << string_compose(_("improper input channel list in XML node (%1)"), prop->value()) << endmsg;
 189                         return -1;
 190                 }
 191         }
 192
 193         return 0;
 194 }
 195
 196 int
 197 AudioTrack::set_state (const XMLNode& node, int version)
 198 {
 199         const XMLProperty *prop;
 200
 201         if (Track::set_state (node, version)) {
 202                 return -1;
 203         }
 204
 205         if ((prop = node.property (X_("mode"))) != 0) {
 206                 _mode = TrackMode (string_2_enum (prop->value(), _mode));
 207         } else {
 208                 _mode = Normal;
 209         }
 210
 211         pending_state = const_cast<XMLNode*> (&node);
 212
 213         if (_session.state_of_the_state() & Session::Loading) {
 214                 _session.StateReady.connect_same_thread (*this, boost::bind (&AudioTrack::set_state_part_two, this));
 215         } else {
 216                 set_state_part_two ();
 217         }
 218
 219         return 0;
 220 }
 221
 222 XMLNode&
 223 AudioTrack::state (bool full_state)
 224 {
 225         XMLNode& root (Track::state(full_state));
 226         XMLNode* freeze_node;
 227         char buf[64];
 228
 229         if (_freeze_record.playlist) {
 230                 XMLNode* inode;
 231
 232                 freeze_node = new XMLNode (X_("freeze-info"));
 233                 freeze_node->add_property ("playlist", _freeze_record.playlist->name());
 234                 freeze_node->add_property ("state", enum_2_string (_freeze_record.state));
 235
 236                 for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 237                         inode = new XMLNode (X_("processor"));
 238                         (*i)->id.print (buf, sizeof (buf));
 239                         inode->add_property (X_("id"), buf);
 240                         inode->add_child_copy ((*i)->state);
 241
 242                         freeze_node->add_child_nocopy (*inode);
 243                 }
 244
 245                 root.add_child_nocopy (*freeze_node);
 246         }
 247
 248         root.add_property (X_("mode"), enum_2_string (_mode));
 249
 250         return root;
 251 }
 252
 253 void
 254 AudioTrack::set_state_part_two ()
 255 {
 256         XMLNode* fnode;
 257         XMLProperty* prop;
 258         LocaleGuard lg (X_("POSIX"));
 259
 260         /* This is called after all session state has been restored but before
 261            have been made ports and connections are established.
 262         */
 263
 264         if (pending_state == 0) {
 265                 return;
 266         }
 267
 268         if ((fnode = find_named_node (*pending_state, X_("freeze-info"))) != 0) {
 269
 270                 _freeze_record.state = Frozen;
 271
 272                 for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 273                         delete *i;
 274                 }
 275                 _freeze_record.processor_info.clear ();
 276
 277                 if ((prop = fnode->property (X_("playlist"))) != 0) {
 278                         boost::shared_ptr<Playlist> pl = _session.playlists->by_name (prop->value());
 279                         if (pl) {
 280                                 _freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist> (pl);
 281                         } else {
 282                                 _freeze_record.playlist.reset ();
 283                                 _freeze_record.state = NoFreeze;
 284                         return;
 285                         }
 286                 }
 287
 288                 if ((prop = fnode->property (X_("state"))) != 0) {
 289                         _freeze_record.state = FreezeState (string_2_enum (prop->value(), _freeze_record.state));
 290                 }
 291
 292                 XMLNodeConstIterator citer;
 293                 XMLNodeList clist = fnode->children();
 294
 295                 for (citer = clist.begin(); citer != clist.end(); ++citer) {
 296                         if ((*citer)->name() != X_("processor")) {
 297                                 continue;
 298                         }
 299
 300                         if ((prop = (*citer)->property (X_("id"))) == 0) {
 301                                 continue;
 302                         }
 303
 304                         FreezeRecordProcessorInfo* frii = new FreezeRecordProcessorInfo (*((*citer)->children().front()),
 305                                                                                    boost::shared_ptr<Processor>());
 306                         frii->id = prop->value ();
 307                         _freeze_record.processor_info.push_back (frii);
 308                 }
 309         }
 310 }
 311
 312 /** @param need_butler to be set to true if this track now needs the butler, otherwise it can be left alone
 313  *  or set to false.
 314  */
 315 int
 316 AudioTrack::roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, int declick, bool& need_butler)
 317 {
 318         Glib::RWLock::ReaderLock lm (_processor_lock, Glib::TRY_LOCK);
 319
 320         if (!lm.locked()) {
 321                 return 0;
 322         }
 323
 324         Sample* b;
 325         Sample* tmpb;
 326         framepos_t transport_frame;
 327         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 328
 329         automation_snapshot (start_frame, false);
 330
 331         if (n_outputs().n_total() == 0 && _processors.empty()) {
 332                 return 0;
 333         }
 334
 335         if (!_active) {
 336                 silence (nframes);
 337                 return 0;
 338         }
 339
 340         transport_frame = _session.transport_frame();
 341
 342         int dret;
 343         framecnt_t playback_distance;
 344
 345         if ((nframes = check_initial_delay (nframes, transport_frame)) == 0) {
 346
 347                 /* need to do this so that the diskstream sets its
 348                    playback distance to zero, thus causing diskstream::commit
 349                    to do nothing.
 350                 */
 351
 352                 dret = diskstream->process (transport_frame, 0, playback_distance);
 353                 need_butler = diskstream->commit (playback_distance);
 354                 return dret;
 355         }
 356
 357         _silent = false;
 358         _amp->apply_gain_automation(false);
 359
 360         if ((dret = diskstream->process (transport_frame, nframes, playback_distance)) != 0) {
 361                 need_butler = diskstream->commit (playback_distance);
 362                 silence (nframes);
 363                 return dret;
 364         }
 365
 366         /* special condition applies */
 367
 368         if (_meter_point == MeterInput) {
 369                 _input->process_input (_meter, start_frame, end_frame, nframes);
 370         }
 371
 372         if (monitoring_state() == MonitoringInput) {
 373
 374                 passthru (start_frame, end_frame, nframes, false);
 375
 376         } else if ((b = diskstream->playback_buffer(0)) != 0) {
 377
 378                 /*
 379                   XXX is it true that the earlier test on n_outputs()
 380                   means that we can avoid checking it again here? i think
 381                   so, because changing the i/o configuration of an IO
 382                   requires holding the AudioEngine lock, which we hold
 383                   while in the process() tree.
 384                 */
 385
 386
 387                 /* copy the diskstream data to all output buffers */
 388
 389                 size_t limit = input_streams ().n_audio();
 390                 BufferSet& bufs = _session.get_scratch_buffers ();
 391                 const size_t blimit = bufs.count().n_audio();
 392
 393                 uint32_t n;
 394                 uint32_t i;
 395
 396                 if (limit > blimit) {
 397
 398                         /* example case: auditioner configured for stereo output,
 399                            but loaded with an 8 channel file. there are only
 400                            2 passthrough buffers, but n_process_buffers() will
 401                            return 8.
 402
 403                            arbitrary decision: map all channels in the diskstream
 404                            to the outputs available.
 405                         */
 406
 407                         float scaling = limit/blimit;
 408
 409                         for (i = 0, n = 1; i < blimit; ++i, ++n) {
 410
 411                                 /* first time through just copy a channel into
 412                                    the output buffer.
 413                                 */
 414
 415                                 Sample* bb = bufs.get_audio (i).data();
 416
 417                                 for (pframes_t xx = 0; xx < nframes; ++xx) {
 418                                         bb[xx] = b[xx] * scaling;
 419                                 }
 420
 421                                 if (n < diskstream->n_channels().n_audio()) {
 422                                         tmpb = diskstream->playback_buffer(n);
 423                                         if (tmpb!=0) {
 424                                                 b = tmpb;
 425                                         }
 426                                 }
 427                         }
 428
 429                         for (;i < limit; ++i, ++n) {
 430
 431                                 /* for all remaining channels, sum with existing
 432                                    data in the output buffers
 433                                 */
 434
 435                                 bufs.get_audio (i%blimit).accumulate_with_gain_from (b, nframes, 0, scaling);
 436
 437                                 if (n < diskstream->n_channels().n_audio()) {
 438                                         tmpb = diskstream->playback_buffer(n);
 439                                         if (tmpb!=0) {
 440                                                 b = tmpb;
 441                                         }
 442                                 }
 443
 444                         }
 445
 446                         limit = blimit;
 447
 448                 } else {
 449                         for (i = 0, n = 1; i < limit; ++i, ++n) {
 450                                 memcpy (bufs.get_audio (i).data(), b, sizeof (Sample) * nframes);
 451                                 if (n < diskstream->n_channels().n_audio()) {
 452                                         tmpb = diskstream->playback_buffer(n);
 453                                         if (tmpb!=0) {
 454                                                 b = tmpb;
 455                                         }
 456                                 }
 457                         }
 458
 459                         /* try to leave any MIDI buffers alone */
 460
 461                         ChanCount chn;
 462                         chn.set_audio (limit);
 463                         chn.set_midi (_input->n_ports().n_midi());
 464                         bufs.set_count (chn);
 465                 }
 466
 467                 /* final argument: don't waste time with automation if we're recording or we've just stopped (yes it can happen) */
 468
 469                 process_output_buffers (
 470                         bufs, start_frame, end_frame, nframes,
 471                         declick,
 472                         (!diskstream->record_enabled() && _session.transport_rolling())
 473                         );
 474
 475         } else {
 476                 /* problem with the diskstream; just be quiet for a bit */
 477                 silence (nframes);
 478         }
 479
 480         need_butler = diskstream->commit (playback_distance);
 481
 482         return 0;
 483 }
 484
 485 int
 486 AudioTrack::export_stuff (BufferSet& buffers, framepos_t start, framecnt_t nframes,
 487                           boost::shared_ptr<Processor> endpoint, bool include_endpoint, bool for_export)
 488 {
 489         boost::scoped_array<gain_t> gain_buffer (new gain_t[nframes]);
 490         boost::scoped_array<Sample> mix_buffer (new Sample[nframes]);
 491         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 492
 493         Glib::RWLock::ReaderLock rlock (_processor_lock);
 494
 495         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist());
 496
 497         assert(apl);
 498         assert(buffers.count().n_audio() >= 1);
 499         assert ((framecnt_t) buffers.get_audio(0).capacity() >= nframes);
 500
 501         if (apl->read (buffers.get_audio(0).data(), mix_buffer.get(), gain_buffer.get(), start, nframes) != nframes) {
 502                 return -1;
 503         }
 504
 505         uint32_t n=1;
 506         Sample* b = buffers.get_audio(0).data();
 507         BufferSet::audio_iterator bi = buffers.audio_begin();
 508         ++bi;
 509         for ( ; bi != buffers.audio_end(); ++bi, ++n) {
 510                 if (n < diskstream->n_channels().n_audio()) {
 511                         if (apl->read (bi->data(), mix_buffer.get(), gain_buffer.get(), start, nframes, n) != nframes) {
 512                                 return -1;
 513                         }
 514                         b = bi->data();
 515                 } else {
 516                         /* duplicate last across remaining buffers */
 517                         memcpy (bi->data(), b, sizeof (Sample) * nframes);
 518                 }
 519         }
 520
 521         // If no processing is required, there's no need to go any further.
 522
 523         if (!endpoint && !include_endpoint) {
 524                 return 0;
 525         }
 526
 527         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 528
 529                 if (!include_endpoint && (*i) == endpoint) {
 530                         break;
 531                 }
 532
 533                 /* if we're not exporting, stop processing if we come across a routing processor.
 534                  */
 535
 536                 if (!for_export && (*i)->does_routing()) {
 537                         break;
 538                 }
 539
 540                 /* even for export, don't run any processor that does routing.
 541
 542                    oh, and don't bother with the peak meter either.
 543                  */
 544
 545                 if (!(*i)->does_routing() && !boost::dynamic_pointer_cast<PeakMeter>(*i)) {
 546                         (*i)->run (buffers, start, start+nframes, nframes, true);
 547                 }
 548
 549                 if ((*i) == endpoint) {
 550                         break;
 551                 }
 552         }
 553
 554         return 0;
 555 }
 556
 557 bool
 558 AudioTrack::bounceable (boost::shared_ptr<Processor> endpoint, bool include_endpoint) const
 559 {
 560         if (!endpoint && !include_endpoint) {
 561                 /* no processing - just read from the playlist and create new
 562                    files: always possible.
 563                 */
 564                 return true;
 565         }
 566
 567         Glib::RWLock::ReaderLock lm (_processor_lock);
 568         uint32_t naudio = n_inputs().n_audio();
 569
 570         for (ProcessorList::const_iterator r = _processors.begin(); r != _processors.end(); ++r) {
 571
 572                 /* if we're not including the endpoint, potentially stop
 573                    right here before we test matching i/o valences.
 574                 */
 575
 576                 if (!include_endpoint && (*r) == endpoint) {
 577                         return true;
 578                 }
 579
 580                 /* ignore any processors that do routing, because we will not
 581                  * use them during a bounce/freeze/export operation.
 582                  */
 583
 584                 if ((*r)->does_routing()) {
 585                         continue;
 586                 }
 587
 588                 /* does the output from the last considered processor match the
 589                  * input to this one?
 590                  */
 591
 592                 if (naudio != (*r)->input_streams().n_audio()) {
 593                         return false;
 594                 }
 595
 596                 /* we're including the endpoint - if we just hit it,
 597                    then stop.
 598                 */
 599
 600                 if ((*r) == endpoint) {
 601                         return true;
 602                 }
 603
 604                 /* save outputs of this processor to test against inputs
 605                    of the next one.
 606                 */
 607
 608                 naudio = (*r)->output_streams().n_audio();
 609         }
 610
 611         return true;
 612 }
 613
 614 boost::shared_ptr<Region>
 615 AudioTrack::bounce (InterThreadInfo& itt)
 616 {
 617         return bounce_range (_session.current_start_frame(), _session.current_end_frame(), itt, main_outs(), false);
 618 }
 619
 620 boost::shared_ptr<Region>
 621 AudioTrack::bounce_range (framepos_t start, framepos_t end, InterThreadInfo& itt,
 622                           boost::shared_ptr<Processor> endpoint, bool include_endpoint)
 623 {
 624         vector<boost::shared_ptr<Source> > srcs;
 625         return _session.write_one_track (*this, start, end, false, srcs, itt, endpoint, include_endpoint, false);
 626 }
 627
 628 void
 629 AudioTrack::freeze_me (InterThreadInfo& itt)
 630 {
 631         vector<boost::shared_ptr<Source> > srcs;
 632         string new_playlist_name;
 633         boost::shared_ptr<Playlist> new_playlist;
 634         string dir;
 635         string region_name;
 636         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 637
 638         if ((_freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist())) == 0) {
 639                 return;
 640         }
 641
 642         uint32_t n = 1;
 643
 644         while (n < (UINT_MAX-1)) {
 645
 646                 string candidate;
 647
 648                 candidate = string_compose ("<F%2>%1", _freeze_record.playlist->name(), n);
 649
 650                 if (_session.playlists->by_name (candidate) == 0) {
 651                         new_playlist_name = candidate;
 652                         break;
 653                 }
 654
 655                 ++n;
 656
 657         }
 658
 659         if (n == (UINT_MAX-1)) {
 660           error << string_compose (X_("There are too many frozen versions of playlist \"%1\""
 661                             " to create another one"), _freeze_record.playlist->name())
 662                << endmsg;
 663                 return;
 664         }
 665
 666         boost::shared_ptr<Region> res;
 667
 668         if ((res = _session.write_one_track (*this, _session.current_start_frame(), _session.current_end_frame(), true, srcs, itt,
 669                                              main_outs(), false, false)) == 0) {
 670                 return;
 671         }
 672
 673         _freeze_record.processor_info.clear ();
 674
 675         {
 676                 Glib::RWLock::ReaderLock lm (_processor_lock);
 677
 678                 for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
 679
 680                         if (!(*r)->does_routing()) {
 681
 682                                 FreezeRecordProcessorInfo* frii  = new FreezeRecordProcessorInfo ((*r)->get_state(), (*r));
 683
 684                                 frii->id = (*r)->id();
 685
 686                                 _freeze_record.processor_info.push_back (frii);
 687
 688                                 /* now deactivate the processor */
 689
 690                                 (*r)->deactivate ();
 691                         }
 692
 693                         _session.set_dirty ();
 694                 }
 695         }
 696
 697         new_playlist = PlaylistFactory::create (DataType::AUDIO, _session, new_playlist_name, false);
 698
 699         /* XXX need main outs automation state _freeze_record.pan_automation_state = _mainpanner->automation_state(); */
 700
 701         region_name = new_playlist_name;
 702
 703         /* create a new region from all filesources, keep it private */
 704
 705         PropertyList plist;
 706
 707         plist.add (Properties::start, 0);
 708         plist.add (Properties::length, srcs[0]->length(srcs[0]->timeline_position()));
 709         plist.add (Properties::name, region_name);
 710         plist.add (Properties::whole_file, true);
 711
 712         boost::shared_ptr<Region> region (RegionFactory::create (srcs, plist, false));
 713
 714         new_playlist->set_orig_track_id (id());
 715         new_playlist->add_region (region, _session.current_start_frame());
 716         new_playlist->set_frozen (true);
 717         region->set_locked (true);
 718
 719         diskstream->use_playlist (boost::dynamic_pointer_cast<AudioPlaylist>(new_playlist));
 720         diskstream->set_record_enabled (false);
 721
 722         /* reset stuff that has already been accounted for in the freeze process */
 723
 724         set_gain (1.0, this);
 725         _amp->gain_control()->set_automation_state (Off);
 726         /* XXX need to use _main_outs _panner->set_automation_state (Off); */
 727
 728         _freeze_record.state = Frozen;
 729         FreezeChange(); /* EMIT SIGNAL */
 730 }
 731
 732 void
 733 AudioTrack::unfreeze ()
 734 {
 735         if (_freeze_record.playlist) {
 736                 audio_diskstream()->use_playlist (_freeze_record.playlist);
 737
 738                 {
 739                         Glib::RWLock::ReaderLock lm (_processor_lock); // should this be a write lock? jlc
 740                         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 741                                 for (vector<FreezeRecordProcessorInfo*>::iterator ii = _freeze_record.processor_info.begin(); ii != _freeze_record.processor_info.end(); ++ii) {
 742                                         if ((*ii)->id == (*i)->id()) {
 743                                                 (*i)->set_state (((*ii)->state), Stateful::current_state_version);
 744                                                 break;
 745                                         }
 746                                 }
 747                         }
 748                 }
 749
 750                 _freeze_record.playlist.reset ();
 751                 /* XXX need to use _main_outs _panner->set_automation_state (_freeze_record.pan_automation_state); */
 752         }
 753
 754         _freeze_record.state = UnFrozen;
 755         FreezeChange (); /* EMIT SIGNAL */
 756 }
 757
 758 boost::shared_ptr<AudioFileSource>
 759 AudioTrack::write_source (uint32_t n)
 760 {
 761         boost::shared_ptr<AudioDiskstream> ds = boost::dynamic_pointer_cast<AudioDiskstream> (_diskstream);
 762         assert (ds);
 763         return ds->write_source (n);
 764 }
 765
 766 boost::shared_ptr<Diskstream>
 767 AudioTrack::diskstream_factory (XMLNode const & node)
 768 {
 769         return boost::shared_ptr<Diskstream> (new AudioDiskstream (_session, node));
 770 }