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