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