libs/ardour/audio_track.cc

   1 /*
   2     Copyright (C) 2002 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <sigc++/retype.h>
  21 #include <sigc++/retype_return.h>
  22 #include <sigc++/bind.h>
  23
  24 #include <pbd/error.h>
  25 #include <pbd/enumwriter.h>
  26
  27 #include <ardour/audio_track.h>
  28 #include <ardour/audio_diskstream.h>
  29 #include <ardour/session.h>
  30 #include <ardour/redirect.h>
  31 #include <ardour/audioregion.h>
  32 #include <ardour/audiosource.h>
  33 #include <ardour/region_factory.h>
  34 #include <ardour/route_group_specialized.h>
  35 #include <ardour/insert.h>
  36 #include <ardour/audioplaylist.h>
  37 #include <ardour/playlist_factory.h>
  38 #include <ardour/panner.h>
  39 #include <ardour/utils.h>
  40
  41 #include "i18n.h"
  42
  43 using namespace std;
  44 using namespace ARDOUR;
  45 using namespace PBD;
  46
  47 AudioTrack::AudioTrack (Session& sess, string name, Route::Flag flag, TrackMode mode)
  48         : Track (sess, name, flag, mode)
  49 {
  50         AudioDiskstream::Flag dflags = AudioDiskstream::Flag (0);
  51
  52         if (_flags & Hidden) {
  53                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Hidden);
  54         } else {
  55                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Recordable);
  56         }
  57
  58         if (mode == Destructive) {
  59                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Destructive);
  60         }
  61
  62         boost::shared_ptr<AudioDiskstream> ds (new AudioDiskstream (_session, name, dflags));
  63
  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_("recenable")) {
 280                         _rec_enable_control.set_state (*child);
 281                         _session.add_controllable (&_rec_enable_control);
 282                 }
 283         }
 284
 285         pending_state = const_cast<XMLNode*> (&node);
 286
 287         _session.StateReady.connect (mem_fun (*this, &AudioTrack::set_state_part_two));
 288
 289         return 0;
 290 }
 291
 292 XMLNode&
 293 AudioTrack::state(bool full_state)
 294 {
 295         XMLNode& root (Route::state(full_state));
 296         XMLNode* freeze_node;
 297         char buf[64];
 298
 299         if (_freeze_record.playlist) {
 300                 XMLNode* inode;
 301
 302                 freeze_node = new XMLNode (X_("freeze-info"));
 303                 freeze_node->add_property ("playlist", _freeze_record.playlist->name());
 304                 freeze_node->add_property ("state", enum_2_string (_freeze_record.state));
 305
 306                 for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 307                         inode = new XMLNode (X_("insert"));
 308                         (*i)->id.print (buf, sizeof (buf));
 309                         inode->add_property (X_("id"), buf);
 310                         inode->add_child_copy ((*i)->state);
 311
 312                         freeze_node->add_child_nocopy (*inode);
 313                 }
 314
 315                 root.add_child_nocopy (*freeze_node);
 316         }
 317
 318         /* Alignment: act as a proxy for the diskstream */
 319
 320         XMLNode* align_node = new XMLNode (X_("alignment"));
 321         AlignStyle as = _diskstream->alignment_style ();
 322         align_node->add_property (X_("style"), enum_2_string (as));
 323         root.add_child_nocopy (*align_node);
 324
 325         root.add_property (X_("mode"), enum_2_string (_mode));
 326
 327         /* we don't return diskstream state because we don't
 328            own the diskstream exclusively. control of the diskstream
 329            state is ceded to the Session, even if we create the
 330            diskstream.
 331         */
 332
 333         _diskstream->id().print (buf, sizeof (buf));
 334         root.add_property ("diskstream-id", buf);
 335
 336         root.add_child_nocopy (_rec_enable_control.get_state());
 337
 338         return root;
 339 }
 340
 341 void
 342 AudioTrack::set_state_part_two ()
 343 {
 344         XMLNode* fnode;
 345         XMLProperty* prop;
 346         LocaleGuard lg (X_("POSIX"));
 347
 348         /* This is called after all session state has been restored but before
 349            have been made ports and connections are established.
 350         */
 351
 352         if (pending_state == 0) {
 353                 return;
 354         }
 355
 356         if ((fnode = find_named_node (*pending_state, X_("freeze-info"))) != 0) {
 357
 358
 359                 _freeze_record.have_mementos = false;
 360                 _freeze_record.state = Frozen;
 361
 362                 for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 363                         delete *i;
 364                 }
 365                 _freeze_record.insert_info.clear ();
 366
 367                 if ((prop = fnode->property (X_("playlist"))) != 0) {
 368                         boost::shared_ptr<Playlist> pl = _session.playlist_by_name (prop->value());
 369                         if (pl) {
 370                                 _freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist> (pl);
 371                         } else {
 372                                 _freeze_record.playlist.reset ();
 373                                 _freeze_record.state = NoFreeze;
 374                         return;
 375                         }
 376                 }
 377
 378                 if ((prop = fnode->property (X_("state"))) != 0) {
 379                         _freeze_record.state = FreezeState (string_2_enum (prop->value(), _freeze_record.state));
 380                 }
 381
 382                 XMLNodeConstIterator citer;
 383                 XMLNodeList clist = fnode->children();
 384
 385                 for (citer = clist.begin(); citer != clist.end(); ++citer) {
 386                         if ((*citer)->name() != X_("insert")) {
 387                                 continue;
 388                         }
 389
 390                         if ((prop = (*citer)->property (X_("id"))) == 0) {
 391                                 continue;
 392                         }
 393
 394                         FreezeRecordInsertInfo* frii = new FreezeRecordInsertInfo (*((*citer)->children().front()),
 395                                                                                    boost::shared_ptr<Insert>());
 396                         frii->id = prop->value ();
 397                         _freeze_record.insert_info.push_back (frii);
 398                 }
 399         }
 400
 401         /* Alignment: act as a proxy for the diskstream */
 402
 403         if ((fnode = find_named_node (*pending_state, X_("alignment"))) != 0) {
 404
 405                 if ((prop = fnode->property (X_("style"))) != 0) {
 406
 407                         /* fix for older sessions from before EnumWriter */
 408
 409                         string pstr;
 410
 411                         if (prop->value() == "capture") {
 412                                 pstr = "CaptureTime";
 413                         } else if (prop->value() == "existing") {
 414                                 pstr = "ExistingMaterial";
 415                         } else {
 416                                 pstr = prop->value();
 417                         }
 418
 419                         AlignStyle as = AlignStyle (string_2_enum (pstr, as));
 420                         _diskstream->set_persistent_align_style (as);
 421                 }
 422         }
 423         return;
 424 }
 425
 426 uint32_t
 427 AudioTrack::n_process_buffers ()
 428 {
 429         return max ((uint32_t) _diskstream->n_channels(), redirect_max_outs);
 430 }
 431
 432 void
 433 AudioTrack::passthru_silence (nframes_t start_frame, nframes_t end_frame, nframes_t nframes, nframes_t offset, int declick, bool meter)
 434 {
 435         uint32_t nbufs = n_process_buffers ();
 436         process_output_buffers (_session.get_silent_buffers (nbufs), nbufs, start_frame, end_frame, nframes, offset, true, declick, meter);
 437 }
 438
 439 int
 440 AudioTrack::no_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset,
 441                      bool session_state_changing, bool can_record, bool rec_monitors_input)
 442 {
 443         if (n_outputs() == 0) {
 444                 return 0;
 445         }
 446
 447         if (!_active) {
 448                 silence (nframes, offset);
 449                 return 0;
 450         }
 451
 452         if (session_state_changing) {
 453
 454                 /* XXX is this safe to do against transport state changes? */
 455
 456                 passthru_silence (start_frame, end_frame, nframes, offset, 0, false);
 457                 return 0;
 458         }
 459
 460         audio_diskstream()->check_record_status (start_frame, nframes, can_record);
 461
 462         bool send_silence;
 463
 464         if (_have_internal_generator) {
 465                 /* since the instrument has no input streams,
 466                    there is no reason to send any signal
 467                    into the route.
 468                 */
 469                 send_silence = true;
 470         } else {
 471
 472                 if (Config->get_auto_input()) {
 473                         if (Config->get_monitoring_model() == SoftwareMonitoring) {
 474                                 send_silence = false;
 475                         } else {
 476                                 send_silence = true;
 477                         }
 478                 } else {
 479                         if (_diskstream->record_enabled()) {
 480                                 if (Config->get_monitoring_model() == SoftwareMonitoring) {
 481                                         send_silence = false;
 482                                 } else {
 483                                         send_silence = true;
 484                                 }
 485                         } else {
 486                                 send_silence = true;
 487                         }
 488                 }
 489         }
 490
 491         apply_gain_automation = false;
 492
 493         if (send_silence) {
 494
 495                 /* if we're sending silence, but we want the meters to show levels for the signal,
 496                    meter right here.
 497                 */
 498
 499                 if (_have_internal_generator) {
 500                         passthru_silence (start_frame, end_frame, nframes, offset, 0, true);
 501                 } else {
 502                         if (_meter_point == MeterInput) {
 503                                 just_meter_input (start_frame, end_frame, nframes, offset);
 504                         }
 505                         passthru_silence (start_frame, end_frame, nframes, offset, 0, false);
 506                 }
 507
 508         } else {
 509
 510                 /* we're sending signal, but we may still want to meter the input.
 511                  */
 512
 513                 passthru (start_frame, end_frame, nframes, offset, 0, (_meter_point == MeterInput));
 514         }
 515
 516         return 0;
 517 }
 518
 519 int
 520 AudioTrack::roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset, int declick,
 521                   bool can_record, bool rec_monitors_input)
 522 {
 523         int dret;
 524         Sample* b;
 525         Sample* tmpb;
 526         nframes_t transport_frame;
 527         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 528
 529         {
 530                 Glib::RWLock::ReaderLock lm (redirect_lock, Glib::TRY_LOCK);
 531                 if (lm.locked()) {
 532                         // automation snapshot can also be called from the non-rt context
 533                         // and it uses the redirect list, so we take the lock out here
 534                         automation_snapshot (start_frame);
 535                 }
 536         }
 537
 538
 539         if (n_outputs() == 0 && _redirects.empty()) {
 540                 return 0;
 541         }
 542
 543         if (!_active) {
 544                 silence (nframes, offset);
 545                 return 0;
 546         }
 547
 548         transport_frame = _session.transport_frame();
 549
 550         if ((nframes = check_initial_delay (nframes, offset, transport_frame)) == 0) {
 551                 /* need to do this so that the diskstream sets its
 552                    playback distance to zero, thus causing diskstream::commit
 553                    to do nothing.
 554                 */
 555                 return diskstream->process (transport_frame, 0, 0, can_record, rec_monitors_input);
 556         }
 557
 558         _silent = false;
 559         apply_gain_automation = false;
 560
 561         if ((dret = diskstream->process (transport_frame, nframes, offset, can_record, rec_monitors_input)) != 0) {
 562
 563                 silence (nframes, offset);
 564
 565                 return dret;
 566         }
 567
 568         /* special condition applies */
 569
 570         if (_meter_point == MeterInput) {
 571                 just_meter_input (start_frame, end_frame, nframes, offset);
 572         }
 573
 574         if (diskstream->record_enabled() && !can_record && !Config->get_auto_input()) {
 575
 576                 /* not actually recording, but we want to hear the input material anyway,
 577                    at least potentially (depending on monitoring options)
 578                  */
 579
 580                 passthru (start_frame, end_frame, nframes, offset, 0, true);
 581
 582         } else if ((b = diskstream->playback_buffer(0)) != 0) {
 583
 584                 /*
 585                   XXX is it true that the earlier test on n_outputs()
 586                   means that we can avoid checking it again here? i think
 587                   so, because changing the i/o configuration of an IO
 588                   requires holding the AudioEngine lock, which we hold
 589                   while in the process() tree.
 590                 */
 591
 592
 593                 /* copy the diskstream data to all output buffers */
 594
 595                 vector<Sample*>& bufs = _session.get_passthru_buffers ();
 596                 uint32_t limit = n_process_buffers ();
 597
 598                 uint32_t n;
 599                 uint32_t i;
 600
 601
 602                 for (i = 0, n = 1; i < limit; ++i, ++n) {
 603                         memcpy (bufs[i], b, sizeof (Sample) * nframes);
 604                         if (n < diskstream->n_channels()) {
 605                                 tmpb = diskstream->playback_buffer(n);
 606                                 if (tmpb!=0) {
 607                                         b = tmpb;
 608                                 }
 609                         }
 610                 }
 611
 612                 /* don't waste time with automation if we're recording or we've just stopped (yes it can happen) */
 613
 614                 if (!diskstream->record_enabled() && _session.transport_rolling()) {
 615                         Glib::Mutex::Lock am (automation_lock, Glib::TRY_LOCK);
 616
 617                         if (am.locked() && gain_automation_playback()) {
 618                                 apply_gain_automation = _gain_automation_curve.rt_safe_get_vector (start_frame, end_frame, _session.gain_automation_buffer(), nframes);
 619                         }
 620                 }
 621
 622                 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));
 623
 624         } else {
 625                 /* problem with the diskstream; just be quiet for a bit */
 626                 silence (nframes, offset);
 627         }
 628
 629         return 0;
 630 }
 631
 632 int
 633 AudioTrack::silent_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset,
 634                          bool can_record, bool rec_monitors_input)
 635 {
 636         if (n_outputs() == 0 && _redirects.empty()) {
 637                 return 0;
 638         }
 639
 640         if (!_active) {
 641                 silence (nframes, offset);
 642                 return 0;
 643         }
 644
 645         _silent = true;
 646         apply_gain_automation = false;
 647
 648         silence (nframes, offset);
 649
 650         return audio_diskstream()->process (_session.transport_frame() + offset, nframes, offset, can_record, rec_monitors_input);
 651 }
 652
 653 int
 654 AudioTrack::export_stuff (vector<Sample*>& buffers, uint32_t nbufs, nframes_t start, nframes_t nframes)
 655 {
 656         gain_t  gain_automation[nframes];
 657         gain_t  gain_buffer[nframes];
 658         float   mix_buffer[nframes];
 659         RedirectList::iterator i;
 660         bool post_fader_work = false;
 661         gain_t this_gain = _gain;
 662         vector<Sample*>::iterator bi;
 663         Sample * b;
 664         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 665
 666         Glib::RWLock::ReaderLock rlock (redirect_lock);
 667
 668         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist());
 669         assert(apl);
 670
 671         if (apl->read (buffers[0], mix_buffer, gain_buffer, start, nframes) != nframes) {
 672                 return -1;
 673         }
 674
 675         uint32_t n=1;
 676         bi = buffers.begin();
 677         b = buffers[0];
 678         ++bi;
 679         for (; bi != buffers.end(); ++bi, ++n) {
 680                 if (n < diskstream->n_channels()) {
 681                         if (apl->read ((*bi), mix_buffer, gain_buffer, start, nframes, n) != nframes) {
 682                                 return -1;
 683                         }
 684                         b = (*bi);
 685                 }
 686                 else {
 687                         /* duplicate last across remaining buffers */
 688                         memcpy ((*bi), b, sizeof (Sample) * nframes);
 689                 }
 690         }
 691
 692
 693         /* note: only run inserts during export. other layers in the machinery
 694            will already have checked that there are no external port inserts.
 695         */
 696
 697         for (i = _redirects.begin(); i != _redirects.end(); ++i) {
 698                 boost::shared_ptr<Insert> insert;
 699
 700                 if ((insert = boost::dynamic_pointer_cast<Insert>(*i)) != 0) {
 701                         switch (insert->placement()) {
 702                         case PreFader:
 703                                 insert->run (buffers, nbufs, nframes, 0);
 704                                 break;
 705                         case PostFader:
 706                                 post_fader_work = true;
 707                                 break;
 708                         }
 709                 }
 710         }
 711
 712         if (_gain_automation_curve.automation_state() == Play) {
 713
 714                 _gain_automation_curve.get_vector (start, start + nframes, gain_automation, nframes);
 715
 716                 for (bi = buffers.begin(); bi != buffers.end(); ++bi) {
 717                         Sample *b = *bi;
 718                         for (nframes_t n = 0; n < nframes; ++n) {
 719                                 b[n] *= gain_automation[n];
 720                         }
 721                 }
 722
 723         } else {
 724
 725                 for (bi = buffers.begin(); bi != buffers.end(); ++bi) {
 726                         Sample *b = *bi;
 727                         for (nframes_t n = 0; n < nframes; ++n) {
 728                                 b[n] *= this_gain;
 729                         }
 730                 }
 731         }
 732
 733         if (post_fader_work) {
 734
 735                 for (i = _redirects.begin(); i != _redirects.end(); ++i) {
 736                         boost::shared_ptr<PluginInsert> insert;
 737
 738                         if ((insert = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
 739                                 switch ((*i)->placement()) {
 740                                 case PreFader:
 741                                         break;
 742                                 case PostFader:
 743                                         insert->run (buffers, nbufs, nframes, 0);
 744                                         break;
 745                                 }
 746                         }
 747                 }
 748         }
 749
 750         return 0;
 751 }
 752
 753 void
 754 AudioTrack::bounce (InterThreadInfo& itt)
 755 {
 756         vector<boost::shared_ptr<AudioSource> > srcs;
 757         _session.write_one_audio_track (*this, 0, _session.current_end_frame(), false, srcs, itt);
 758 }
 759
 760
 761 void
 762 AudioTrack::bounce_range (nframes_t start, nframes_t end, InterThreadInfo& itt)
 763 {
 764         vector<boost::shared_ptr<AudioSource> > srcs;
 765         _session.write_one_audio_track (*this, start, end, false, srcs, itt);
 766 }
 767
 768 void
 769 AudioTrack::freeze (InterThreadInfo& itt)
 770 {
 771         vector<boost::shared_ptr<AudioSource> > srcs;
 772         string new_playlist_name;
 773         boost::shared_ptr<Playlist> new_playlist;
 774         string dir;
 775         string region_name;
 776         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 777
 778         if ((_freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist())) == 0) {
 779                 return;
 780         }
 781
 782         uint32_t n = 1;
 783
 784         while (n < (UINT_MAX-1)) {
 785
 786                 string candidate;
 787
 788                 candidate = string_compose ("<F%2>%1", _freeze_record.playlist->name(), n);
 789
 790                 if (_session.playlist_by_name (candidate) == 0) {
 791                         new_playlist_name = candidate;
 792                         break;
 793                 }
 794
 795                 ++n;
 796
 797         }
 798
 799         if (n == (UINT_MAX-1)) {
 800           error << string_compose (X_("There are too many frozen versions of playlist \"%1\""
 801                             " to create another one"), _freeze_record.playlist->name())
 802                << endmsg;
 803                 return;
 804         }
 805
 806         if (_session.write_one_audio_track (*this, _session.current_start_frame(), _session.current_end_frame(), true, srcs, itt)) {
 807                 return;
 808         }
 809
 810         _freeze_record.insert_info.clear ();
 811         _freeze_record.have_mementos = true;
 812
 813         {
 814                 Glib::RWLock::ReaderLock lm (redirect_lock);
 815
 816                 for (RedirectList::iterator r = _redirects.begin(); r != _redirects.end(); ++r) {
 817
 818                         boost::shared_ptr<Insert> insert;
 819
 820                         if ((insert = boost::dynamic_pointer_cast<Insert>(*r)) != 0) {
 821
 822                                 FreezeRecordInsertInfo* frii  = new FreezeRecordInsertInfo ((*r)->get_state(), insert);
 823
 824                                 frii->id = insert->id();
 825
 826                                 _freeze_record.insert_info.push_back (frii);
 827
 828                                 /* now deactivate the insert */
 829
 830                                 insert->set_active (false, this);
 831                         }
 832                 }
 833         }
 834
 835         new_playlist = PlaylistFactory::create (_session, new_playlist_name, false);
 836         region_name = new_playlist_name;
 837
 838         /* create a new region from all filesources, keep it private */
 839
 840         boost::shared_ptr<Region> region (RegionFactory::create (srcs, 0, srcs[0]->length(),
 841                                                                  region_name, 0,
 842                                                                  (AudioRegion::Flag) (AudioRegion::WholeFile|AudioRegion::DefaultFlags),
 843                                                                  false));
 844
 845         new_playlist->set_orig_diskstream_id (diskstream->id());
 846         new_playlist->add_region (region, _session.current_start_frame());
 847         new_playlist->set_frozen (true);
 848         region->set_locked (true);
 849
 850         diskstream->use_playlist (boost::dynamic_pointer_cast<AudioPlaylist>(new_playlist));
 851         diskstream->set_record_enabled (false);
 852
 853         _freeze_record.state = Frozen;
 854         FreezeChange(); /* EMIT SIGNAL */
 855 }
 856
 857 void
 858 AudioTrack::unfreeze ()
 859 {
 860         if (_freeze_record.playlist) {
 861                 audio_diskstream()->use_playlist (_freeze_record.playlist);
 862
 863                 if (_freeze_record.have_mementos) {
 864
 865                         for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 866                                 (*i)->memento ();
 867                         }
 868
 869                 } else {
 870
 871                         Glib::RWLock::ReaderLock lm (redirect_lock); // should this be a write lock? jlc
 872                         for (RedirectList::iterator i = _redirects.begin(); i != _redirects.end(); ++i) {
 873                                 for (vector<FreezeRecordInsertInfo*>::iterator ii = _freeze_record.insert_info.begin(); ii != _freeze_record.insert_info.end(); ++ii) {
 874                                         if ((*ii)->id == (*i)->id()) {
 875                                                 (*i)->set_state (((*ii)->state));
 876                                                 break;
 877                                         }
 878                                 }
 879                         }
 880                 }
 881
 882                 _freeze_record.playlist.reset ();
 883         }
 884
 885         _freeze_record.state = UnFrozen;
 886         FreezeChange (); /* EMIT SIGNAL */
 887 }
 888