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     $Id$
  19 */
  20
  21 #include <sigc++/retype.h>
  22 #include <sigc++/retype_return.h>
  23 #include <sigc++/bind.h>
  24
  25 #include <pbd/error.h>
  26 #include <pbd/enumwriter.h>
  27
  28 #include <ardour/audio_track.h>
  29 #include <ardour/audio_diskstream.h>
  30 #include <ardour/session.h>
  31 #include <ardour/redirect.h>
  32 #include <ardour/audioregion.h>
  33 #include <ardour/audiosource.h>
  34 #include <ardour/region_factory.h>
  35 #include <ardour/route_group_specialized.h>
  36 #include <ardour/insert.h>
  37 #include <ardour/audioplaylist.h>
  38 #include <ardour/playlist_factory.h>
  39 #include <ardour/panner.h>
  40 #include <ardour/utils.h>
  41
  42 #include "i18n.h"
  43
  44 using namespace std;
  45 using namespace ARDOUR;
  46 using namespace PBD;
  47
  48 AudioTrack::AudioTrack (Session& sess, string name, Route::Flag flag, TrackMode mode)
  49         : Track (sess, name, flag, mode)
  50 {
  51         AudioDiskstream::Flag dflags = AudioDiskstream::Flag (0);
  52
  53         if (_flags & Hidden) {
  54                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Hidden);
  55         } else {
  56                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Recordable);
  57         }
  58
  59         if (mode == Destructive) {
  60                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Destructive);
  61         }
  62
  63         boost::shared_ptr<AudioDiskstream> ds (new AudioDiskstream (_session, name, dflags));
  64         _session.add_diskstream (ds);
  65
  66         set_diskstream (boost::dynamic_pointer_cast<AudioDiskstream> (ds), this);
  67 }
  68
  69 AudioTrack::AudioTrack (Session& sess, const XMLNode& node)
  70         : Track (sess, node)
  71 {
  72         _set_state (node, false);
  73 }
  74
  75 AudioTrack::~AudioTrack ()
  76 {
  77 }
  78
  79 int
  80 AudioTrack::set_mode (TrackMode m)
  81 {
  82         if (m != _mode) {
  83
  84                 if (_diskstream->set_destructive (m == Destructive)) {
  85                         return -1;
  86                 }
  87
  88                 _mode = m;
  89
  90                 TrackModeChanged (); /* EMIT SIGNAL */
  91         }
  92
  93         return 0;
  94 }
  95
  96 bool
  97 AudioTrack::can_use_mode (TrackMode m, bool& bounce_required)
  98 {
  99         switch (m) {
 100         case Normal:
 101                 bounce_required = false;
 102                 return true;
 103
 104         case Destructive:
 105         default:
 106                 return _diskstream->can_become_destructive (bounce_required);
 107         }
 108 }
 109
 110 int
 111 AudioTrack::deprecated_use_diskstream_connections ()
 112 {
 113         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 114
 115         if (diskstream->deprecated_io_node == 0) {
 116                 return 0;
 117         }
 118
 119         const XMLProperty* prop;
 120         XMLNode& node (*diskstream->deprecated_io_node);
 121
 122         /* don't do this more than once. */
 123
 124         diskstream->deprecated_io_node = 0;
 125
 126         set_input_minimum (-1);
 127         set_input_maximum (-1);
 128         set_output_minimum (-1);
 129         set_output_maximum (-1);
 130
 131         if ((prop = node.property ("gain")) != 0) {
 132                 set_gain (atof (prop->value().c_str()), this);
 133                 _gain = _desired_gain;
 134         }
 135
 136         if ((prop = node.property ("input-connection")) != 0) {
 137                 Connection* c = _session.connection_by_name (prop->value());
 138
 139                 if (c == 0) {
 140                         error << string_compose(_("Unknown connection \"%1\" listed for input of %2"), prop->value(), _name) << endmsg;
 141
 142                         if ((c = _session.connection_by_name (_("in 1"))) == 0) {
 143                                 error << _("No input connections available as a replacement")
 144                                 << endmsg;
 145                                 return -1;
 146                         } else {
 147                                 info << string_compose (_("Connection %1 was not available - \"in 1\" used instead"), prop->value())
 148                                << endmsg;
 149                         }
 150                 }
 151
 152                 use_input_connection (*c, this);
 153
 154         } else if ((prop = node.property ("inputs")) != 0) {
 155                 if (set_inputs (prop->value())) {
 156                         error << string_compose(_("improper input channel list in XML node (%1)"), prop->value()) << endmsg;
 157                         return -1;
 158                 }
 159         }
 160
 161         return 0;
 162 }
 163
 164 int
 165 AudioTrack::set_diskstream (boost::shared_ptr<AudioDiskstream> ds, void *src)
 166 {
 167         _diskstream = ds;
 168         _diskstream->set_io (*this);
 169         _diskstream->set_destructive (_mode == Destructive);
 170
 171         if (audio_diskstream()->deprecated_io_node) {
 172
 173                 if (!connecting_legal) {
 174                         ConnectingLegal.connect (mem_fun (*this, &AudioTrack::deprecated_use_diskstream_connections));
 175                 } else {
 176                         deprecated_use_diskstream_connections ();
 177                 }
 178         }
 179
 180         _diskstream->set_record_enabled (false);
 181         _diskstream->monitor_input (false);
 182
 183         ic_connection.disconnect();
 184         ic_connection = input_changed.connect (mem_fun (*_diskstream, &Diskstream::handle_input_change));
 185
 186         DiskstreamChanged (); /* EMIT SIGNAL */
 187
 188         return 0;
 189 }
 190
 191 int
 192 AudioTrack::use_diskstream (string name)
 193 {
 194         boost::shared_ptr<AudioDiskstream> dstream;
 195
 196         if ((dstream = boost::dynamic_pointer_cast<AudioDiskstream>(_session.diskstream_by_name (name))) == 0) {
 197                 error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), name) << endmsg;
 198                 return -1;
 199         }
 200
 201         return set_diskstream (dstream, this);
 202 }
 203
 204 int
 205 AudioTrack::use_diskstream (const PBD::ID& id)
 206 {
 207         boost::shared_ptr<AudioDiskstream> dstream;
 208
 209         if ((dstream = boost::dynamic_pointer_cast<AudioDiskstream> (_session.diskstream_by_id (id))) == 0) {
 210                 error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), id) << endmsg;
 211                 return -1;
 212         }
 213
 214         return set_diskstream (dstream, this);
 215 }
 216
 217 boost::shared_ptr<AudioDiskstream>
 218 AudioTrack::audio_diskstream() const
 219 {
 220         return boost::dynamic_pointer_cast<AudioDiskstream>(_diskstream);
 221 }
 222
 223 int
 224 AudioTrack::set_state (const XMLNode& node)
 225 {
 226         return _set_state (node, true);
 227 }
 228
 229 int
 230 AudioTrack::_set_state (const XMLNode& node, bool call_base)
 231 {
 232         const XMLProperty *prop;
 233         XMLNodeConstIterator iter;
 234
 235         if (call_base) {
 236                 if (Route::_set_state (node, call_base)) {
 237                         return -1;
 238                 }
 239         }
 240
 241         if ((prop = node.property (X_("mode"))) != 0) {
 242                 _mode = TrackMode (string_2_enum (prop->value(), _mode));
 243         } else {
 244                 _mode = Normal;
 245         }
 246
 247         if ((prop = node.property ("diskstream-id")) == 0) {
 248
 249                 /* some old sessions use the diskstream name rather than the ID */
 250
 251                 if ((prop = node.property ("diskstream")) == 0) {
 252                         fatal << _("programming error: AudioTrack given state without diskstream!") << endmsg;
 253                         /*NOTREACHED*/
 254                         return -1;
 255                 }
 256
 257                 if (use_diskstream (prop->value())) {
 258                         return -1;
 259                 }
 260
 261         } else {
 262
 263                 PBD::ID id (prop->value());
 264
 265                 if (use_diskstream (id)) {
 266                         return -1;
 267                 }
 268         }
 269
 270
 271         XMLNodeList nlist;
 272         XMLNodeConstIterator niter;
 273         XMLNode *child;
 274
 275         nlist = node.children();
 276         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
 277                 child = *niter;
 278
 279                 if (child->name() == X_("remote_control")) {
 280                         if ((prop = child->property (X_("id"))) != 0) {
 281                                 int32_t x;
 282                                 sscanf (prop->value().c_str(), "%d", &x);
 283                                 set_remote_control_id (x);
 284                         }
 285
 286                 } else if (child->name() == X_("recenable")) {
 287                         _rec_enable_control.set_state (*child);
 288                         _session.add_controllable (&_rec_enable_control);
 289                 }
 290         }
 291
 292         pending_state = const_cast<XMLNode*> (&node);
 293
 294         _session.StateReady.connect (mem_fun (*this, &AudioTrack::set_state_part_two));
 295
 296         return 0;
 297 }
 298
 299 XMLNode&
 300 AudioTrack::state(bool full_state)
 301 {
 302         XMLNode& root (Route::state(full_state));
 303         XMLNode* freeze_node;
 304         char buf[64];
 305
 306         if (_freeze_record.playlist) {
 307                 XMLNode* inode;
 308
 309                 freeze_node = new XMLNode (X_("freeze-info"));
 310                 freeze_node->add_property ("playlist", _freeze_record.playlist->name());
 311                 freeze_node->add_property ("state", enum_2_string (_freeze_record.state));
 312
 313                 for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 314                         inode = new XMLNode (X_("insert"));
 315                         (*i)->id.print (buf, sizeof (buf));
 316                         inode->add_property (X_("id"), buf);
 317                         inode->add_child_copy ((*i)->state);
 318
 319                         freeze_node->add_child_nocopy (*inode);
 320                 }
 321
 322                 root.add_child_nocopy (*freeze_node);
 323         }
 324
 325         /* Alignment: act as a proxy for the diskstream */
 326
 327         XMLNode* align_node = new XMLNode (X_("alignment"));
 328         AlignStyle as = _diskstream->alignment_style ();
 329         align_node->add_property (X_("style"), enum_2_string (as));
 330         root.add_child_nocopy (*align_node);
 331
 332         XMLNode* remote_control_node = new XMLNode (X_("remote_control"));
 333         snprintf (buf, sizeof (buf), "%d", _remote_control_id);
 334         remote_control_node->add_property (X_("id"), buf);
 335         root.add_child_nocopy (*remote_control_node);
 336
 337         root.add_property (X_("mode"), enum_2_string (_mode));
 338
 339         /* we don't return diskstream state because we don't
 340            own the diskstream exclusively. control of the diskstream
 341            state is ceded to the Session, even if we create the
 342            diskstream.
 343         */
 344
 345         _diskstream->id().print (buf, sizeof (buf));
 346         root.add_property ("diskstream-id", buf);
 347
 348         root.add_child_nocopy (_rec_enable_control.get_state());
 349
 350         return root;
 351 }
 352
 353 void
 354 AudioTrack::set_state_part_two ()
 355 {
 356         XMLNode* fnode;
 357         XMLProperty* prop;
 358         LocaleGuard lg (X_("POSIX"));
 359
 360         /* This is called after all session state has been restored but before
 361            have been made ports and connections are established.
 362         */
 363
 364         if (pending_state == 0) {
 365                 return;
 366         }
 367
 368         if ((fnode = find_named_node (*pending_state, X_("freeze-info"))) != 0) {
 369
 370
 371                 _freeze_record.have_mementos = false;
 372                 _freeze_record.state = Frozen;
 373
 374                 for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 375                         delete *i;
 376                 }
 377                 _freeze_record.insert_info.clear ();
 378
 379                 if ((prop = fnode->property (X_("playlist"))) != 0) {
 380                         boost::shared_ptr<Playlist> pl = _session.playlist_by_name (prop->value());
 381                         if (pl) {
 382                                 _freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist> (pl);
 383                         } else {
 384                                 _freeze_record.playlist.reset ();
 385                                 _freeze_record.state = NoFreeze;
 386                         return;
 387                         }
 388                 }
 389
 390                 if ((prop = fnode->property (X_("state"))) != 0) {
 391                         _freeze_record.state = FreezeState (string_2_enum (prop->value(), _freeze_record.state));
 392                 }
 393
 394                 XMLNodeConstIterator citer;
 395                 XMLNodeList clist = fnode->children();
 396
 397                 for (citer = clist.begin(); citer != clist.end(); ++citer) {
 398                         if ((*citer)->name() != X_("insert")) {
 399                                 continue;
 400                         }
 401
 402                         if ((prop = (*citer)->property (X_("id"))) == 0) {
 403                                 continue;
 404                         }
 405
 406                         FreezeRecordInsertInfo* frii = new FreezeRecordInsertInfo (*((*citer)->children().front()),
 407                                                                                    boost::shared_ptr<Insert>());
 408                         frii->id = prop->value ();
 409                         _freeze_record.insert_info.push_back (frii);
 410                 }
 411         }
 412
 413         /* Alignment: act as a proxy for the diskstream */
 414
 415         if ((fnode = find_named_node (*pending_state, X_("alignment"))) != 0) {
 416
 417                 if ((prop = fnode->property (X_("style"))) != 0) {
 418
 419                         /* fix for older sessions from before EnumWriter */
 420
 421                         string pstr;
 422
 423                         if (prop->value() == "capture") {
 424                                 pstr = "CaptureTime";
 425                         } else if (prop->value() == "existing") {
 426                                 pstr = "ExistingMaterial";
 427                         } else {
 428                                 pstr = prop->value();
 429                         }
 430
 431                         AlignStyle as = AlignStyle (string_2_enum (pstr, as));
 432                         _diskstream->set_persistent_align_style (as);
 433                 }
 434         }
 435         return;
 436 }
 437
 438 uint32_t
 439 AudioTrack::n_process_buffers ()
 440 {
 441         return max ((uint32_t) _diskstream->n_channels(), redirect_max_outs);
 442 }
 443
 444 void
 445 AudioTrack::passthru_silence (nframes_t start_frame, nframes_t end_frame, nframes_t nframes, nframes_t offset, int declick, bool meter)
 446 {
 447         uint32_t nbufs = n_process_buffers ();
 448         process_output_buffers (_session.get_silent_buffers (nbufs), nbufs, start_frame, end_frame, nframes, offset, true, declick, meter);
 449 }
 450
 451 int
 452 AudioTrack::no_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset,
 453                      bool session_state_changing, bool can_record, bool rec_monitors_input)
 454 {
 455         if (n_outputs() == 0) {
 456                 return 0;
 457         }
 458
 459         if (!_active) {
 460                 silence (nframes, offset);
 461                 return 0;
 462         }
 463
 464         if (session_state_changing) {
 465
 466                 /* XXX is this safe to do against transport state changes? */
 467
 468                 passthru_silence (start_frame, end_frame, nframes, offset, 0, false);
 469                 return 0;
 470         }
 471
 472         audio_diskstream()->check_record_status (start_frame, nframes, can_record);
 473
 474         bool send_silence;
 475
 476         if (_have_internal_generator) {
 477                 /* since the instrument has no input streams,
 478                    there is no reason to send any signal
 479                    into the route.
 480                 */
 481                 send_silence = true;
 482         } else {
 483
 484                 if (Config->get_auto_input()) {
 485                         if (Config->get_monitoring_model() == SoftwareMonitoring) {
 486                                 send_silence = false;
 487                         } else {
 488                                 send_silence = true;
 489                         }
 490                 } else {
 491                         if (_diskstream->record_enabled()) {
 492                                 if (Config->get_monitoring_model() == SoftwareMonitoring) {
 493                                         send_silence = false;
 494                                 } else {
 495                                         send_silence = true;
 496                                 }
 497                         } else {
 498                                 send_silence = true;
 499                         }
 500                 }
 501         }
 502
 503         apply_gain_automation = false;
 504
 505         if (send_silence) {
 506
 507                 /* if we're sending silence, but we want the meters to show levels for the signal,
 508                    meter right here.
 509                 */
 510
 511                 if (_have_internal_generator) {
 512                         passthru_silence (start_frame, end_frame, nframes, offset, 0, true);
 513                 } else {
 514                         if (_meter_point == MeterInput) {
 515                                 just_meter_input (start_frame, end_frame, nframes, offset);
 516                         }
 517                         passthru_silence (start_frame, end_frame, nframes, offset, 0, false);
 518                 }
 519
 520         } else {
 521
 522                 /* we're sending signal, but we may still want to meter the input.
 523                  */
 524
 525                 passthru (start_frame, end_frame, nframes, offset, 0, (_meter_point == MeterInput));
 526         }
 527
 528         return 0;
 529 }
 530
 531 int
 532 AudioTrack::roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset, int declick,
 533                   bool can_record, bool rec_monitors_input)
 534 {
 535         int dret;
 536         Sample* b;
 537         Sample* tmpb;
 538         nframes_t transport_frame;
 539         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 540
 541         {
 542                 Glib::RWLock::ReaderLock lm (redirect_lock, Glib::TRY_LOCK);
 543                 if (lm.locked()) {
 544                         // automation snapshot can also be called from the non-rt context
 545                         // and it uses the redirect list, so we take the lock out here
 546                         automation_snapshot (start_frame);
 547                 }
 548         }
 549
 550
 551         if (n_outputs() == 0 && _redirects.empty()) {
 552                 return 0;
 553         }
 554
 555         if (!_active) {
 556                 silence (nframes, offset);
 557                 return 0;
 558         }
 559
 560         transport_frame = _session.transport_frame();
 561
 562         if ((nframes = check_initial_delay (nframes, offset, transport_frame)) == 0) {
 563                 /* need to do this so that the diskstream sets its
 564                    playback distance to zero, thus causing diskstream::commit
 565                    to do nothing.
 566                 */
 567                 return diskstream->process (transport_frame, 0, 0, can_record, rec_monitors_input);
 568         }
 569
 570         _silent = false;
 571         apply_gain_automation = false;
 572
 573         if ((dret = diskstream->process (transport_frame, nframes, offset, can_record, rec_monitors_input)) != 0) {
 574
 575                 silence (nframes, offset);
 576
 577                 return dret;
 578         }
 579
 580         /* special condition applies */
 581
 582         if (_meter_point == MeterInput) {
 583                 just_meter_input (start_frame, end_frame, nframes, offset);
 584         }
 585
 586         if (diskstream->record_enabled() && !can_record && !Config->get_auto_input()) {
 587
 588                 /* not actually recording, but we want to hear the input material anyway,
 589                    at least potentially (depending on monitoring options)
 590                  */
 591
 592                 passthru (start_frame, end_frame, nframes, offset, 0, true);
 593
 594         } else if ((b = diskstream->playback_buffer(0)) != 0) {
 595
 596                 /*
 597                   XXX is it true that the earlier test on n_outputs()
 598                   means that we can avoid checking it again here? i think
 599                   so, because changing the i/o configuration of an IO
 600                   requires holding the AudioEngine lock, which we hold
 601                   while in the process() tree.
 602                 */
 603
 604
 605                 /* copy the diskstream data to all output buffers */
 606
 607                 vector<Sample*>& bufs = _session.get_passthru_buffers ();
 608                 uint32_t limit = n_process_buffers ();
 609
 610                 uint32_t n;
 611                 uint32_t i;
 612
 613
 614                 for (i = 0, n = 1; i < limit; ++i, ++n) {
 615                         memcpy (bufs[i], b, sizeof (Sample) * nframes);
 616                         if (n < diskstream->n_channels()) {
 617                                 tmpb = diskstream->playback_buffer(n);
 618                                 if (tmpb!=0) {
 619                                         b = tmpb;
 620                                 }
 621                         }
 622                 }
 623
 624                 /* don't waste time with automation if we're recording or we've just stopped (yes it can happen) */
 625
 626                 if (!diskstream->record_enabled() && _session.transport_rolling()) {
 627                         Glib::Mutex::Lock am (automation_lock, Glib::TRY_LOCK);
 628
 629                         if (am.locked() && gain_automation_playback()) {
 630                                 apply_gain_automation = _gain_automation_curve.rt_safe_get_vector (start_frame, end_frame, _session.gain_automation_buffer(), nframes);
 631                         }
 632                 }
 633
 634                 process_output_buffers (bufs, limit, start_frame, end_frame, nframes, offset, (!_session.get_record_enabled() || !Config->get_do_not_record_plugins()), declick, (_meter_point != MeterInput));
 635
 636         } else {
 637                 /* problem with the diskstream; just be quiet for a bit */
 638                 silence (nframes, offset);
 639         }
 640
 641         return 0;
 642 }
 643
 644 int
 645 AudioTrack::silent_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset,
 646                          bool can_record, bool rec_monitors_input)
 647 {
 648         if (n_outputs() == 0 && _redirects.empty()) {
 649                 return 0;
 650         }
 651
 652         if (!_active) {
 653                 silence (nframes, offset);
 654                 return 0;
 655         }
 656
 657         _silent = true;
 658         apply_gain_automation = false;
 659
 660         silence (nframes, offset);
 661
 662         return audio_diskstream()->process (_session.transport_frame() + offset, nframes, offset, can_record, rec_monitors_input);
 663 }
 664
 665 int
 666 AudioTrack::export_stuff (vector<Sample*>& buffers, uint32_t nbufs, nframes_t start, nframes_t nframes)
 667 {
 668         gain_t  gain_automation[nframes];
 669         gain_t  gain_buffer[nframes];
 670         float   mix_buffer[nframes];
 671         RedirectList::iterator i;
 672         bool post_fader_work = false;
 673         gain_t this_gain = _gain;
 674         vector<Sample*>::iterator bi;
 675         Sample * b;
 676         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 677
 678         Glib::RWLock::ReaderLock rlock (redirect_lock);
 679
 680         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist());
 681         assert(apl);
 682
 683         if (apl->read (buffers[0], mix_buffer, gain_buffer, start, nframes) != nframes) {
 684                 return -1;
 685         }
 686
 687         uint32_t n=1;
 688         bi = buffers.begin();
 689         b = buffers[0];
 690         ++bi;
 691         for (; bi != buffers.end(); ++bi, ++n) {
 692                 if (n < diskstream->n_channels()) {
 693                         if (apl->read ((*bi), mix_buffer, gain_buffer, start, nframes, n) != nframes) {
 694                                 return -1;
 695                         }
 696                         b = (*bi);
 697                 }
 698                 else {
 699                         /* duplicate last across remaining buffers */
 700                         memcpy ((*bi), b, sizeof (Sample) * nframes);
 701                 }
 702         }
 703
 704
 705         /* note: only run inserts during export. other layers in the machinery
 706            will already have checked that there are no external port inserts.
 707         */
 708
 709         for (i = _redirects.begin(); i != _redirects.end(); ++i) {
 710                 boost::shared_ptr<Insert> insert;
 711
 712                 if ((insert = boost::dynamic_pointer_cast<Insert>(*i)) != 0) {
 713                         switch (insert->placement()) {
 714                         case PreFader:
 715                                 insert->run (buffers, nbufs, nframes, 0);
 716                                 break;
 717                         case PostFader:
 718                                 post_fader_work = true;
 719                                 break;
 720                         }
 721                 }
 722         }
 723
 724         if (_gain_automation_curve.automation_state() == Play) {
 725
 726                 _gain_automation_curve.get_vector (start, start + nframes, gain_automation, nframes);
 727
 728                 for (bi = buffers.begin(); bi != buffers.end(); ++bi) {
 729                         Sample *b = *bi;
 730                         for (nframes_t n = 0; n < nframes; ++n) {
 731                                 b[n] *= gain_automation[n];
 732                         }
 733                 }
 734
 735         } else {
 736
 737                 for (bi = buffers.begin(); bi != buffers.end(); ++bi) {
 738                         Sample *b = *bi;
 739                         for (nframes_t n = 0; n < nframes; ++n) {
 740                                 b[n] *= this_gain;
 741                         }
 742                 }
 743         }
 744
 745         if (post_fader_work) {
 746
 747                 for (i = _redirects.begin(); i != _redirects.end(); ++i) {
 748                         boost::shared_ptr<PluginInsert> insert;
 749
 750                         if ((insert = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
 751                                 switch ((*i)->placement()) {
 752                                 case PreFader:
 753                                         break;
 754                                 case PostFader:
 755                                         insert->run (buffers, nbufs, nframes, 0);
 756                                         break;
 757                                 }
 758                         }
 759                 }
 760         }
 761
 762         return 0;
 763 }
 764
 765 void
 766 AudioTrack::bounce (InterThreadInfo& itt)
 767 {
 768         vector<boost::shared_ptr<AudioSource> > srcs;
 769         _session.write_one_audio_track (*this, 0, _session.current_end_frame(), false, srcs, itt);
 770 }
 771
 772
 773 void
 774 AudioTrack::bounce_range (nframes_t start, nframes_t end, InterThreadInfo& itt)
 775 {
 776         vector<boost::shared_ptr<AudioSource> > srcs;
 777         _session.write_one_audio_track (*this, start, end, false, srcs, itt);
 778 }
 779
 780 void
 781 AudioTrack::freeze (InterThreadInfo& itt)
 782 {
 783         vector<boost::shared_ptr<AudioSource> > srcs;
 784         string new_playlist_name;
 785         boost::shared_ptr<Playlist> new_playlist;
 786         string dir;
 787         string region_name;
 788         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 789
 790         if ((_freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist())) == 0) {
 791                 return;
 792         }
 793
 794         uint32_t n = 1;
 795
 796         while (n < (UINT_MAX-1)) {
 797
 798                 string candidate;
 799
 800                 candidate = string_compose ("<F%2>%1", _freeze_record.playlist->name(), n);
 801
 802                 if (_session.playlist_by_name (candidate) == 0) {
 803                         new_playlist_name = candidate;
 804                         break;
 805                 }
 806
 807                 ++n;
 808
 809         }
 810
 811         if (n == (UINT_MAX-1)) {
 812           error << string_compose (X_("There are too many frozen versions of playlist \"%1\""
 813                             " to create another one"), _freeze_record.playlist->name())
 814                << endmsg;
 815                 return;
 816         }
 817
 818         if (_session.write_one_audio_track (*this, _session.current_start_frame(), _session.current_end_frame(), true, srcs, itt)) {
 819                 return;
 820         }
 821
 822         _freeze_record.insert_info.clear ();
 823         _freeze_record.have_mementos = true;
 824
 825         {
 826                 Glib::RWLock::ReaderLock lm (redirect_lock);
 827
 828                 for (RedirectList::iterator r = _redirects.begin(); r != _redirects.end(); ++r) {
 829
 830                         boost::shared_ptr<Insert> insert;
 831
 832                         if ((insert = boost::dynamic_pointer_cast<Insert>(*r)) != 0) {
 833
 834                                 FreezeRecordInsertInfo* frii  = new FreezeRecordInsertInfo ((*r)->get_state(), insert);
 835
 836                                 frii->id = insert->id();
 837
 838                                 _freeze_record.insert_info.push_back (frii);
 839
 840                                 /* now deactivate the insert */
 841
 842                                 insert->set_active (false, this);
 843                         }
 844                 }
 845         }
 846
 847         new_playlist = PlaylistFactory::create (_session, new_playlist_name, false);
 848         region_name = new_playlist_name;
 849
 850         /* create a new region from all filesources, keep it private */
 851
 852         boost::shared_ptr<Region> region (RegionFactory::create (srcs, 0, srcs[0]->length(),
 853                                                                  region_name, 0,
 854                                                                  (AudioRegion::Flag) (AudioRegion::WholeFile|AudioRegion::DefaultFlags),
 855                                                                  false));
 856
 857         new_playlist->set_orig_diskstream_id (diskstream->id());
 858         new_playlist->add_region (region, _session.current_start_frame());
 859         new_playlist->set_frozen (true);
 860         region->set_locked (true);
 861
 862         diskstream->use_playlist (boost::dynamic_pointer_cast<AudioPlaylist>(new_playlist));
 863         diskstream->set_record_enabled (false);
 864
 865         _freeze_record.state = Frozen;
 866         FreezeChange(); /* EMIT SIGNAL */
 867 }
 868
 869 void
 870 AudioTrack::unfreeze ()
 871 {
 872         if (_freeze_record.playlist) {
 873                 audio_diskstream()->use_playlist (_freeze_record.playlist);
 874
 875                 if (_freeze_record.have_mementos) {
 876
 877                         for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 878                                 (*i)->memento ();
 879                         }
 880
 881                 } else {
 882
 883                         Glib::RWLock::ReaderLock lm (redirect_lock); // should this be a write lock? jlc
 884                         for (RedirectList::iterator i = _redirects.begin(); i != _redirects.end(); ++i) {
 885                                 for (vector<FreezeRecordInsertInfo*>::iterator ii = _freeze_record.insert_info.begin(); ii != _freeze_record.insert_info.end(); ++ii) {
 886                                         if ((*ii)->id == (*i)->id()) {
 887                                                 (*i)->set_state (((*ii)->state));
 888                                                 break;
 889                                         }
 890                                 }
 891                         }
 892                 }
 893
 894                 _freeze_record.playlist.reset ();
 895         }
 896
 897         _freeze_record.state = UnFrozen;
 898         FreezeChange (); /* EMIT SIGNAL */
 899 }
 900