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