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 #include <ardour/buffer_set.h>
  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         AudioDiskstream* ds = new AudioDiskstream (_session, name, dflags);
  59
  60         set_diskstream (*ds, this);
  61 }
  62
  63 AudioTrack::AudioTrack (Session& sess, const XMLNode& node)
  64         : Track (sess, node)
  65 {
  66         set_state (node);
  67 }
  68
  69 AudioTrack::~AudioTrack ()
  70 {
  71 }
  72
  73 int
  74 AudioTrack::deprecated_use_diskstream_connections ()
  75 {
  76         AudioDiskstream& diskstream = audio_diskstream();
  77
  78         if (diskstream.deprecated_io_node == 0) {
  79                 return 0;
  80         }
  81
  82         const XMLProperty* prop;
  83         XMLNode& node (*diskstream.deprecated_io_node);
  84
  85         /* don't do this more than once. */
  86
  87         diskstream.deprecated_io_node = 0;
  88
  89         set_input_minimum (-1);
  90         set_input_maximum (-1);
  91         set_output_minimum (-1);
  92         set_output_maximum (-1);
  93
  94         if ((prop = node.property ("gain")) != 0) {
  95                 set_gain (atof (prop->value().c_str()), this);
  96                 _gain = _desired_gain;
  97         }
  98
  99         if ((prop = node.property ("input-connection")) != 0) {
 100                 Connection* c = _session.connection_by_name (prop->value());
 101
 102                 if (c == 0) {
 103                         error << string_compose(_("Unknown connection \"%1\" listed for input of %2"), prop->value(), _name) << endmsg;
 104
 105                         if ((c = _session.connection_by_name (_("in 1"))) == 0) {
 106                                 error << _("No input connections available as a replacement")
 107                                 << endmsg;
 108                                 return -1;
 109                         } else {
 110                                 info << string_compose (_("Connection %1 was not available - \"in 1\" used instead"), prop->value())
 111                                << endmsg;
 112                         }
 113                 }
 114
 115                 use_input_connection (*c, this);
 116
 117         } else if ((prop = node.property ("inputs")) != 0) {
 118                 if (set_inputs (prop->value())) {
 119                         error << string_compose(_("improper input channel list in XML node (%1)"), prop->value()) << endmsg;
 120                         return -1;
 121                 }
 122         }
 123
 124         return 0;
 125 }
 126
 127 int
 128 AudioTrack::set_diskstream (AudioDiskstream& ds, void *src)
 129 {
 130         if (_diskstream) {
 131                 _diskstream->unref();
 132         }
 133
 134         _diskstream = &ds.ref();
 135         _diskstream->set_io (*this);
 136         _diskstream->set_destructive (_mode == Destructive);
 137
 138         if (audio_diskstream().deprecated_io_node) {
 139
 140                 if (!connecting_legal) {
 141                         ConnectingLegal.connect (mem_fun (*this, &AudioTrack::deprecated_use_diskstream_connections));
 142                 } else {
 143                         deprecated_use_diskstream_connections ();
 144                 }
 145         }
 146
 147         _diskstream->set_record_enabled (false);
 148         _diskstream->monitor_input (false);
 149
 150         ic_connection.disconnect();
 151         ic_connection = input_changed.connect (mem_fun (*_diskstream, &Diskstream::handle_input_change));
 152
 153         DiskstreamChanged (); /* EMIT SIGNAL */
 154
 155         return 0;
 156 }
 157
 158 int
 159 AudioTrack::use_diskstream (string name)
 160 {
 161         AudioDiskstream *dstream;
 162
 163         if ((dstream = dynamic_cast<AudioDiskstream*>(_session.diskstream_by_name (name))) == 0) {
 164           error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), name) << endmsg;
 165                 return -1;
 166         }
 167
 168         return set_diskstream (*dstream, this);
 169 }
 170
 171 int
 172 AudioTrack::use_diskstream (const PBD::ID& id)
 173 {
 174         AudioDiskstream *dstream;
 175
 176         if ((dstream = dynamic_cast<AudioDiskstream*>(_session.diskstream_by_id (id))) == 0) {
 177                 error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), id) << endmsg;
 178                 return -1;
 179         }
 180
 181         return set_diskstream (*dstream, this);
 182 }
 183
 184 AudioDiskstream&
 185 AudioTrack::audio_diskstream() const
 186 {
 187         return *dynamic_cast<AudioDiskstream*>(_diskstream);
 188 }
 189
 190 int
 191 AudioTrack::set_state (const XMLNode& node)
 192 {
 193         const XMLProperty *prop;
 194         XMLNodeConstIterator iter;
 195
 196         if (Route::set_state (node)) {
 197                 return -1;
 198         }
 199
 200         if ((prop = node.property (X_("mode"))) != 0) {
 201                 if (prop->value() == X_("normal")) {
 202                         _mode = Normal;
 203                 } else if (prop->value() == X_("destructive")) {
 204                         _mode = Destructive;
 205                 } else {
 206                         warning << string_compose ("unknown audio track mode \"%1\" seen and ignored", prop->value()) << endmsg;
 207                         _mode = Normal;
 208                 }
 209         } else {
 210                 _mode = Normal;
 211         }
 212
 213         if ((prop = node.property ("diskstream-id")) == 0) {
 214
 215                 /* some old sessions use the diskstream name rather than the ID */
 216
 217                 if ((prop = node.property ("diskstream")) == 0) {
 218                         fatal << _("programming error: AudioTrack given state without diskstream!") << endmsg;
 219                         /*NOTREACHED*/
 220                         return -1;
 221                 }
 222
 223                 if (use_diskstream (prop->value())) {
 224                         return -1;
 225                 }
 226
 227         } else {
 228
 229                 PBD::ID id (prop->value());
 230
 231                 if (use_diskstream (id)) {
 232                         return -1;
 233                 }
 234         }
 235
 236
 237         XMLNodeList nlist;
 238         XMLNodeConstIterator niter;
 239         XMLNode *child;
 240
 241         nlist = node.children();
 242         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
 243                 child = *niter;
 244
 245                 if (child->name() == X_("remote_control")) {
 246                         if ((prop = child->property (X_("id"))) != 0) {
 247                                 int32_t x;
 248                                 sscanf (prop->value().c_str(), "%d", &x);
 249                                 set_remote_control_id (x);
 250                         }
 251                 }
 252         }
 253
 254         pending_state = const_cast<XMLNode*> (&node);
 255
 256         _session.StateReady.connect (mem_fun (*this, &AudioTrack::set_state_part_two));
 257
 258         return 0;
 259 }
 260
 261 XMLNode&
 262 AudioTrack::state(bool full_state)
 263 {
 264         XMLNode& root (Route::state(full_state));
 265         XMLNode* freeze_node;
 266         char buf[64];
 267
 268         if (_freeze_record.playlist) {
 269                 XMLNode* inode;
 270
 271                 freeze_node = new XMLNode (X_("freeze-info"));
 272                 freeze_node->add_property ("playlist", _freeze_record.playlist->name());
 273                 snprintf (buf, sizeof (buf), "%d", (int) _freeze_record.state);
 274                 freeze_node->add_property ("state", buf);
 275
 276                 for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 277                         inode = new XMLNode (X_("insert"));
 278                         (*i)->id.print (buf);
 279                         inode->add_property (X_("id"), buf);
 280                         inode->add_child_copy ((*i)->state);
 281
 282                         freeze_node->add_child_nocopy (*inode);
 283                 }
 284
 285                 root.add_child_nocopy (*freeze_node);
 286         }
 287
 288         /* Alignment: act as a proxy for the diskstream */
 289
 290         XMLNode* align_node = new XMLNode (X_("alignment"));
 291         switch (_diskstream->alignment_style()) {
 292         case ExistingMaterial:
 293                 snprintf (buf, sizeof (buf), X_("existing"));
 294                 break;
 295         case CaptureTime:
 296                 snprintf (buf, sizeof (buf), X_("capture"));
 297                 break;
 298         }
 299         align_node->add_property (X_("style"), buf);
 300         root.add_child_nocopy (*align_node);
 301
 302         XMLNode* remote_control_node = new XMLNode (X_("remote_control"));
 303         snprintf (buf, sizeof (buf), "%d", _remote_control_id);
 304         remote_control_node->add_property (X_("id"), buf);
 305         root.add_child_nocopy (*remote_control_node);
 306
 307         switch (_mode) {
 308         case Normal:
 309                 root.add_property (X_("mode"), X_("normal"));
 310                 break;
 311         case Destructive:
 312                 root.add_property (X_("mode"), X_("destructive"));
 313                 break;
 314         }
 315
 316         /* we don't return diskstream state because we don't
 317            own the diskstream exclusively. control of the diskstream
 318            state is ceded to the Session, even if we create the
 319            diskstream.
 320         */
 321
 322         _diskstream->id().print (buf);
 323         root.add_property ("diskstream-id", buf);
 324
 325         return root;
 326 }
 327
 328 void
 329 AudioTrack::set_state_part_two ()
 330 {
 331         XMLNode* fnode;
 332         XMLProperty* prop;
 333         LocaleGuard lg (X_("POSIX"));
 334
 335         /* This is called after all session state has been restored but before
 336            have been made ports and connections are established.
 337         */
 338
 339         if (pending_state == 0) {
 340                 return;
 341         }
 342
 343         if ((fnode = find_named_node (*pending_state, X_("freeze-info"))) != 0) {
 344
 345
 346                 _freeze_record.have_mementos = false;
 347                 _freeze_record.state = Frozen;
 348
 349                 for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 350                         delete *i;
 351                 }
 352                 _freeze_record.insert_info.clear ();
 353
 354                 if ((prop = fnode->property (X_("playlist"))) != 0) {
 355                         Playlist* pl = _session.playlist_by_name (prop->value());
 356                         if (pl) {
 357                                 _freeze_record.playlist = dynamic_cast<AudioPlaylist*> (pl);
 358                         } else {
 359                                 _freeze_record.playlist = 0;
 360                                 _freeze_record.state = NoFreeze;
 361                         return;
 362                         }
 363                 }
 364
 365                 if ((prop = fnode->property (X_("state"))) != 0) {
 366                         _freeze_record.state = (FreezeState) atoi (prop->value().c_str());
 367                 }
 368
 369                 XMLNodeConstIterator citer;
 370                 XMLNodeList clist = fnode->children();
 371
 372                 for (citer = clist.begin(); citer != clist.end(); ++citer) {
 373                         if ((*citer)->name() != X_("insert")) {
 374                                 continue;
 375                         }
 376
 377                         if ((prop = (*citer)->property (X_("id"))) == 0) {
 378                                 continue;
 379                         }
 380
 381                         FreezeRecordInsertInfo* frii = new FreezeRecordInsertInfo (*((*citer)->children().front()),
 382                                                                                    boost::shared_ptr<Insert>());
 383                         frii->id = prop->value ();
 384                         _freeze_record.insert_info.push_back (frii);
 385                 }
 386         }
 387
 388         /* Alignment: act as a proxy for the diskstream */
 389
 390         if ((fnode = find_named_node (*pending_state, X_("alignment"))) != 0) {
 391
 392                 if ((prop = fnode->property (X_("style"))) != 0) {
 393                         if (prop->value() == "existing") {
 394                                 _diskstream->set_persistent_align_style (ExistingMaterial);
 395                         } else if (prop->value() == "capture") {
 396                                 _diskstream->set_persistent_align_style (CaptureTime);
 397                         }
 398                 }
 399         }
 400         return;
 401 }
 402
 403 ChanCount
 404 AudioTrack::n_process_buffers ()
 405 {
 406         return max (_diskstream->n_channels(), redirect_max_outs);
 407 }
 408
 409 void
 410 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)
 411 {
 412         process_output_buffers (_session.get_silent_buffers (n_process_buffers()), start_frame, end_frame, nframes, offset, true, declick, meter);
 413 }
 414
 415 int
 416 AudioTrack::no_roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nframes_t end_frame, jack_nframes_t offset,
 417                      bool session_state_changing, bool can_record, bool rec_monitors_input)
 418 {
 419         if (n_outputs().get_total() == 0) {
 420                 return 0;
 421         }
 422
 423         if (!_active) {
 424                 silence (nframes, offset);
 425                 return 0;
 426         }
 427
 428         if (session_state_changing) {
 429
 430                 /* XXX is this safe to do against transport state changes? */
 431
 432                 passthru_silence (start_frame, end_frame, nframes, offset, 0, false);
 433                 return 0;
 434         }
 435
 436         audio_diskstream().check_record_status (start_frame, nframes, can_record);
 437
 438         bool send_silence;
 439
 440         if (_have_internal_generator) {
 441                 /* since the instrument has no input streams,
 442                    there is no reason to send any signal
 443                    into the route.
 444                 */
 445                 send_silence = true;
 446         } else {
 447
 448                 if (_session.get_auto_input()) {
 449                         if (Config->get_use_sw_monitoring()) {
 450                                 send_silence = false;
 451                         } else {
 452                                 send_silence = true;
 453                         }
 454                 } else {
 455                         if (_diskstream->record_enabled()) {
 456                                 if (Config->get_use_sw_monitoring()) {
 457                                         send_silence = false;
 458                                 } else {
 459                                         send_silence = true;
 460                                 }
 461                         } else {
 462                                 send_silence = true;
 463                         }
 464                 }
 465         }
 466
 467         apply_gain_automation = false;
 468
 469         if (send_silence) {
 470
 471                 /* if we're sending silence, but we want the meters to show levels for the signal,
 472                    meter right here.
 473                 */
 474
 475                 if (_have_internal_generator) {
 476                         passthru_silence (start_frame, end_frame, nframes, offset, 0, true);
 477                 } else {
 478                         if (_meter_point == MeterInput) {
 479                                 just_meter_input (start_frame, end_frame, nframes, offset);
 480                         }
 481                         passthru_silence (start_frame, end_frame, nframes, offset, 0, false);
 482                 }
 483
 484         } else {
 485
 486                 /* we're sending signal, but we may still want to meter the input.
 487                  */
 488
 489                 passthru (start_frame, end_frame, nframes, offset, 0, (_meter_point == MeterInput));
 490         }
 491
 492         return 0;
 493 }
 494
 495 int
 496 AudioTrack::roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nframes_t end_frame, jack_nframes_t offset, int declick,
 497                   bool can_record, bool rec_monitors_input)
 498 {
 499         int dret;
 500         Sample* b;
 501         Sample* tmpb;
 502         jack_nframes_t transport_frame;
 503         AudioDiskstream& diskstream = audio_diskstream();
 504
 505         {
 506                 Glib::RWLock::ReaderLock lm (redirect_lock, Glib::TRY_LOCK);
 507                 if (lm.locked()) {
 508                         // automation snapshot can also be called from the non-rt context
 509                         // and it uses the redirect list, so we take the lock out here
 510                         automation_snapshot (start_frame);
 511                 }
 512         }
 513
 514         if (n_outputs().get_total() == 0 && _redirects.empty()) {
 515                 return 0;
 516         }
 517
 518         if (!_active) {
 519                 silence (nframes, offset);
 520                 return 0;
 521         }
 522
 523         transport_frame = _session.transport_frame();
 524
 525         if ((nframes = check_initial_delay (nframes, offset, transport_frame)) == 0) {
 526                 /* need to do this so that the diskstream sets its
 527                    playback distance to zero, thus causing diskstream::commit
 528                    to do nothing.
 529                 */
 530                 return diskstream.process (transport_frame, 0, 0, can_record, rec_monitors_input);
 531         }
 532
 533         _silent = false;
 534         apply_gain_automation = false;
 535
 536         if ((dret = diskstream.process (transport_frame, nframes, offset, can_record, rec_monitors_input)) != 0) {
 537
 538                 silence (nframes, offset);
 539
 540                 return dret;
 541         }
 542
 543         /* special condition applies */
 544
 545         if (_meter_point == MeterInput) {
 546                 just_meter_input (start_frame, end_frame, nframes, offset);
 547         }
 548
 549         if (diskstream.record_enabled() && !can_record && !_session.get_auto_input()) {
 550
 551                 /* not actually recording, but we want to hear the input material anyway,
 552                    at least potentially (depending on monitoring options)
 553                  */
 554
 555                 passthru (start_frame, end_frame, nframes, offset, 0, true);
 556
 557         } else if ((b = diskstream.playback_buffer(0)) != 0) {
 558
 559                 /*
 560                   XXX is it true that the earlier test on n_outputs()
 561                   means that we can avoid checking it again here? i think
 562                   so, because changing the i/o configuration of an IO
 563                   requires holding the AudioEngine lock, which we hold
 564                   while in the process() tree.
 565                 */
 566
 567
 568                 /* copy the diskstream data to all output buffers */
 569
 570                 const size_t limit = n_process_buffers().get(DataType::AUDIO);
 571                 BufferSet& bufs = _session.get_scratch_buffers (n_process_buffers());
 572
 573                 uint32_t n;
 574                 uint32_t i;
 575
 576                 for (i = 0, n = 1; i < limit; ++i, ++n) {
 577                         memcpy (bufs.get_audio(i).data(nframes), b, sizeof (Sample) * nframes);
 578                         if (n < diskstream.n_channels().get(DataType::AUDIO)) {
 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, start_frame, end_frame, nframes, offset, (!_session.get_record_enabled() || !_session.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().get_total() == 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 (BufferSet& buffers, 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         AudioDiskstream& diskstream = audio_diskstream();
 637
 638         Glib::RWLock::ReaderLock rlock (redirect_lock);
 639
 640         // FIXME
 641         AudioPlaylist* const apl = dynamic_cast<AudioPlaylist*>(diskstream.playlist());
 642         assert(apl);
 643
 644         if (apl->read (buffers.get_audio(nframes).data(nframes),
 645                         mix_buffer, gain_buffer, start, nframes) != nframes) {
 646                 return -1;
 647         }
 648
 649         assert(buffers.count().get(DataType::AUDIO) >= 1);
 650         uint32_t n=1;
 651         Sample* b = buffers.get_audio(0).data(nframes);
 652         BufferSet::audio_iterator bi = buffers.audio_begin();
 653         ++bi;
 654         for ( ; bi != buffers.audio_end(); ++bi, ++n) {
 655                 if (n < diskstream.n_channels().get(DataType::AUDIO)) {
 656                         if (apl->read (bi->data(nframes), mix_buffer, gain_buffer, start, nframes, n) != nframes) {
 657                                 return -1;
 658                         }
 659                         b = bi->data(nframes);
 660                 }
 661                 else {
 662                         /* duplicate last across remaining buffers */
 663                         memcpy (bi->data(nframes), 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, 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 (BufferSet::audio_iterator bi = buffers.audio_begin(); bi != buffers.audio_end(); ++bi) {
 692                         Sample *b = bi->data(nframes);
 693                         for (jack_nframes_t n = 0; n < nframes; ++n) {
 694                                 b[n] *= gain_automation[n];
 695                         }
 696                 }
 697
 698         } else {
 699
 700                 for (BufferSet::audio_iterator bi = buffers.audio_begin(); bi != buffers.audio_end(); ++bi) {
 701                         Sample *b = bi->data(nframes);
 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, nframes, 0);
 719                                         break;
 720                                 }
 721                         }
 722                 }
 723         }
 724
 725         return 0;
 726 }
 727
 728 void
 729 AudioTrack::bounce (InterThreadInfo& itt)
 730 {
 731         vector<Source*> 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<Source*> 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<Source*> srcs;
 747         string new_playlist_name;
 748         Playlist* new_playlist;
 749         string dir;
 750         AudioRegion* region;
 751         string region_name;
 752         AudioDiskstream& diskstream = audio_diskstream();
 753
 754         if ((_freeze_record.playlist = dynamic_cast<AudioPlaylist*>(diskstream.playlist())) == 0) {
 755                 return;
 756         }
 757
 758         uint32_t n = 1;
 759
 760         while (n < (UINT_MAX-1)) {
 761
 762                 string candidate;
 763
 764                 candidate = string_compose ("<F%2>%1", _freeze_record.playlist->name(), n);
 765
 766                 if (_session.playlist_by_name (candidate) == 0) {
 767                         new_playlist_name = candidate;
 768                         break;
 769                 }
 770
 771                 ++n;
 772
 773         }
 774
 775         if (n == (UINT_MAX-1)) {
 776           error << string_compose (X_("There are too many frozen versions of playlist \"%1\""
 777                             " to create another one"), _freeze_record.playlist->name())
 778                << endmsg;
 779                 return;
 780         }
 781
 782         if (_session.write_one_audio_track (*this, 0, _session.current_end_frame(), true, srcs, itt)) {
 783                 return;
 784         }
 785
 786         _freeze_record.insert_info.clear ();
 787         _freeze_record.have_mementos = true;
 788
 789         {
 790                 Glib::RWLock::ReaderLock lm (redirect_lock);
 791
 792                 for (RedirectList::iterator r = _redirects.begin(); r != _redirects.end(); ++r) {
 793
 794                         boost::shared_ptr<Insert> insert;
 795
 796                         if ((insert = boost::dynamic_pointer_cast<Insert>(*r)) != 0) {
 797
 798                                 FreezeRecordInsertInfo* frii  = new FreezeRecordInsertInfo ((*r)->get_state(), insert);
 799
 800                                 frii->id = insert->id();
 801                                 frii->memento = (*r)->get_memento();
 802
 803                                 _freeze_record.insert_info.push_back (frii);
 804
 805                                 /* now deactivate the insert */
 806
 807                                 insert->set_active (false, this);
 808                         }
 809                 }
 810         }
 811
 812         new_playlist = new AudioPlaylist (_session, new_playlist_name, false);
 813         region_name = new_playlist_name;
 814
 815         /* create a new region from all filesources, keep it private */
 816
 817         region = new AudioRegion (srcs, 0, srcs[0]->length(),
 818                                   region_name, 0,
 819                                   (AudioRegion::Flag) (AudioRegion::WholeFile|AudioRegion::DefaultFlags),
 820                                   false);
 821
 822         new_playlist->set_orig_diskstream_id (diskstream.id());
 823         new_playlist->add_region (*region, 0);
 824         new_playlist->set_frozen (true);
 825         region->set_locked (true);
 826
 827         diskstream.use_playlist (dynamic_cast<AudioPlaylist*>(new_playlist));
 828         diskstream.set_record_enabled (false);
 829
 830         _freeze_record.state = Frozen;
 831         FreezeChange(); /* EMIT SIGNAL */
 832 }
 833
 834 void
 835 AudioTrack::unfreeze ()
 836 {
 837         if (_freeze_record.playlist) {
 838                 audio_diskstream().use_playlist (_freeze_record.playlist);
 839
 840                 if (_freeze_record.have_mementos) {
 841
 842                         for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
 843                                 (*i)->memento ();
 844                         }
 845
 846                 } else {
 847
 848                         Glib::RWLock::ReaderLock lm (redirect_lock); // should this be a write lock? jlc
 849                         for (RedirectList::iterator i = _redirects.begin(); i != _redirects.end(); ++i) {
 850                                 for (vector<FreezeRecordInsertInfo*>::iterator ii = _freeze_record.insert_info.begin(); ii != _freeze_record.insert_info.end(); ++ii) {
 851                                         if ((*ii)->id == (*i)->id()) {
 852                                                 (*i)->set_state (((*ii)->state));
 853                                                 break;
 854                                         }
 855                                 }
 856                         }
 857                 }
 858
 859                 _freeze_record.playlist = 0;
 860         }
 861
 862         _freeze_record.state = UnFrozen;
 863         FreezeChange (); /* EMIT SIGNAL */
 864 }
 865