libs/ardour/audio_track.cc

   1 /*
   2     Copyright (C) 2002 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <sigc++/retype.h>
  21 #include <sigc++/retype_return.h>
  22 #include <sigc++/bind.h>
  23
  24 #include <pbd/error.h>
  25 #include <pbd/enumwriter.h>
  26
  27 #include <ardour/audio_track.h>
  28 #include <ardour/audio_diskstream.h>
  29 #include <ardour/session.h>
  30 #include <ardour/io_processor.h>
  31 #include <ardour/audioregion.h>
  32 #include <ardour/audiosource.h>
  33 #include <ardour/region_factory.h>
  34 #include <ardour/route_group_specialized.h>
  35 #include <ardour/processor.h>
  36 #include <ardour/plugin_insert.h>
  37 #include <ardour/audioplaylist.h>
  38 #include <ardour/playlist_factory.h>
  39 #include <ardour/panner.h>
  40 #include <ardour/utils.h>
  41 #include <ardour/buffer_set.h>
  42 #include "i18n.h"
  43
  44 using namespace std;
  45 using namespace ARDOUR;
  46 using namespace PBD;
  47
  48 AudioTrack::AudioTrack (Session& sess, string name, Route::Flag flag, TrackMode mode)
  49         : Track (sess, name, flag, mode)
  50 {
  51         AudioDiskstream::Flag dflags = AudioDiskstream::Flag (0);
  52
  53         if (_flags & Hidden) {
  54                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Hidden);
  55         } else {
  56                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Recordable);
  57         }
  58
  59         if (mode == Destructive) {
  60                 dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Destructive);
  61         }
  62
  63         boost::shared_ptr<AudioDiskstream> ds (new AudioDiskstream (_session, name, dflags));
  64
  65         _session.add_diskstream (ds);
  66
  67         set_diskstream (boost::dynamic_pointer_cast<AudioDiskstream> (ds), this);
  68 }
  69
  70 AudioTrack::AudioTrack (Session& sess, const XMLNode& node)
  71         : Track (sess, node)
  72 {
  73         _set_state (node, false);
  74 }
  75
  76 AudioTrack::~AudioTrack ()
  77 {
  78 }
  79
  80 int
  81 AudioTrack::set_mode (TrackMode m)
  82 {
  83         if (m != _mode) {
  84
  85                 if (_diskstream->set_destructive (m == Destructive)) {
  86                         return -1;
  87                 }
  88
  89                 _mode = m;
  90
  91                 TrackModeChanged (); /* EMIT SIGNAL */
  92         }
  93
  94         return 0;
  95 }
  96
  97 bool
  98 AudioTrack::can_use_mode (TrackMode m, bool& bounce_required)
  99 {
 100         switch (m) {
 101         case Normal:
 102                 bounce_required = false;
 103                 return true;
 104
 105         case Destructive:
 106         default:
 107                 return _diskstream->can_become_destructive (bounce_required);
 108         }
 109 }
 110
 111 int
 112 AudioTrack::deprecated_use_diskstream_connections ()
 113 {
 114         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 115
 116         if (diskstream->deprecated_io_node == 0) {
 117                 return 0;
 118         }
 119
 120         const XMLProperty* prop;
 121         XMLNode& node (*diskstream->deprecated_io_node);
 122
 123         /* don't do this more than once. */
 124
 125         diskstream->deprecated_io_node = 0;
 126
 127         set_input_minimum (ChanCount::ZERO);
 128         set_input_maximum (ChanCount::INFINITE);
 129         set_output_minimum (ChanCount::ZERO);
 130         set_output_maximum (ChanCount::INFINITE);
 131
 132         if ((prop = node.property ("gain")) != 0) {
 133                 set_gain (atof (prop->value().c_str()), this);
 134                 _gain = _desired_gain;
 135         }
 136
 137         if ((prop = node.property ("input-connection")) != 0) {
 138                 Bundle* c = _session.bundle_by_name (prop->value());
 139
 140                 if (c == 0) {
 141                         error << string_compose(_("Unknown bundle \"%1\" listed for input of %2"), prop->value(), _name) << endmsg;
 142
 143                         if ((c = _session.bundle_by_name (_("in 1"))) == 0) {
 144                                 error << _("No input bundles available as a replacement")
 145                                 << endmsg;
 146                                 return -1;
 147                         } else {
 148                                 info << string_compose (_("Bundle %1 was not available - \"in 1\" used instead"), prop->value())
 149                                << endmsg;
 150                         }
 151                 }
 152
 153                 use_input_bundle(*c, this);
 154
 155         } else if ((prop = node.property ("inputs")) != 0) {
 156                 if (set_inputs (prop->value())) {
 157                         error << string_compose(_("improper input channel list in XML node (%1)"), prop->value()) << endmsg;
 158                         return -1;
 159                 }
 160         }
 161
 162         return 0;
 163 }
 164
 165 int
 166 AudioTrack::set_diskstream (boost::shared_ptr<AudioDiskstream> ds, void *src)
 167 {
 168         _diskstream = ds;
 169         _diskstream->set_io (*this);
 170         _diskstream->set_destructive (_mode == Destructive);
 171
 172         if (audio_diskstream()->deprecated_io_node) {
 173
 174                 if (!connecting_legal) {
 175                         ConnectingLegal.connect (mem_fun (*this, &AudioTrack::deprecated_use_diskstream_connections));
 176                 } else {
 177                         deprecated_use_diskstream_connections ();
 178                 }
 179         }
 180
 181         _diskstream->set_record_enabled (false);
 182         _diskstream->monitor_input (false);
 183
 184         ic_connection.disconnect();
 185         ic_connection = input_changed.connect (mem_fun (*_diskstream, &Diskstream::handle_input_change));
 186
 187         DiskstreamChanged (); /* EMIT SIGNAL */
 188
 189         return 0;
 190 }
 191
 192 int
 193 AudioTrack::use_diskstream (string name)
 194 {
 195         boost::shared_ptr<AudioDiskstream> dstream;
 196
 197         if ((dstream = boost::dynamic_pointer_cast<AudioDiskstream>(_session.diskstream_by_name (name))) == 0) {
 198                 error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), name) << endmsg;
 199                 return -1;
 200         }
 201
 202         return set_diskstream (dstream, this);
 203 }
 204
 205 int
 206 AudioTrack::use_diskstream (const PBD::ID& id)
 207 {
 208         boost::shared_ptr<AudioDiskstream> dstream;
 209
 210         if ((dstream = boost::dynamic_pointer_cast<AudioDiskstream> (_session.diskstream_by_id (id))) == 0) {
 211                 error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), id) << endmsg;
 212                 return -1;
 213         }
 214
 215         return set_diskstream (dstream, this);
 216 }
 217
 218 boost::shared_ptr<AudioDiskstream>
 219 AudioTrack::audio_diskstream() const
 220 {
 221         return boost::dynamic_pointer_cast<AudioDiskstream>(_diskstream);
 222 }
 223
 224 int
 225 AudioTrack::set_state (const XMLNode& node)
 226 {
 227         return _set_state (node, true);
 228 }
 229
 230 int
 231 AudioTrack::_set_state (const XMLNode& node, bool call_base)
 232 {
 233         const XMLProperty *prop;
 234         XMLNodeConstIterator iter;
 235
 236         if (call_base) {
 237                 if (Route::_set_state (node, call_base)) {
 238                         return -1;
 239                 }
 240         }
 241
 242         if ((prop = node.property (X_("mode"))) != 0) {
 243                 _mode = TrackMode (string_2_enum (prop->value(), _mode));
 244         } else {
 245                 _mode = Normal;
 246         }
 247
 248         if ((prop = node.property ("diskstream-id")) == 0) {
 249
 250                 /* some old sessions use the diskstream name rather than the ID */
 251
 252                 if ((prop = node.property ("diskstream")) == 0) {
 253                         fatal << _("programming error: AudioTrack given state without diskstream!") << endmsg;
 254                         /*NOTREACHED*/
 255                         return -1;
 256                 }
 257
 258                 if (use_diskstream (prop->value())) {
 259                         return -1;
 260                 }
 261
 262         } else {
 263
 264                 PBD::ID id (prop->value());
 265
 266                 if (use_diskstream (id)) {
 267                         return -1;
 268                 }
 269         }
 270
 271
 272         XMLNodeList nlist;
 273         XMLNodeConstIterator niter;
 274         XMLNode *child;
 275
 276         nlist = node.children();
 277         for (niter = nlist.begin(); niter != nlist.end(); ++niter){
 278                 child = *niter;
 279
 280                 if (child->name() == X_("recenable")) {
 281                         _rec_enable_control->set_state (*child);
 282                         _session.add_controllable (_rec_enable_control);
 283                 }
 284         }
 285
 286         pending_state = const_cast<XMLNode*> (&node);
 287
 288         _session.StateReady.connect (mem_fun (*this, &AudioTrack::set_state_part_two));
 289
 290         return 0;
 291 }
 292
 293 XMLNode&
 294 AudioTrack::state(bool full_state)
 295 {
 296         XMLNode& root (Route::state(full_state));
 297         XMLNode* freeze_node;
 298         char buf[64];
 299
 300         if (_freeze_record.playlist) {
 301                 XMLNode* inode;
 302
 303                 freeze_node = new XMLNode (X_("freeze-info"));
 304                 freeze_node->add_property ("playlist", _freeze_record.playlist->name());
 305                 freeze_node->add_property ("state", enum_2_string (_freeze_record.state));
 306
 307                 for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 308                         inode = new XMLNode (X_("processor"));
 309                         (*i)->id.print (buf, sizeof (buf));
 310                         inode->add_property (X_("id"), buf);
 311                         inode->add_child_copy ((*i)->state);
 312
 313                         freeze_node->add_child_nocopy (*inode);
 314                 }
 315
 316                 root.add_child_nocopy (*freeze_node);
 317         }
 318
 319         /* Alignment: act as a proxy for the diskstream */
 320
 321         XMLNode* align_node = new XMLNode (X_("alignment"));
 322         AlignStyle as = _diskstream->alignment_style ();
 323         align_node->add_property (X_("style"), enum_2_string (as));
 324         root.add_child_nocopy (*align_node);
 325
 326         root.add_property (X_("mode"), enum_2_string (_mode));
 327
 328         /* we don't return diskstream state because we don't
 329            own the diskstream exclusively. control of the diskstream
 330            state is ceded to the Session, even if we create the
 331            diskstream.
 332         */
 333
 334         _diskstream->id().print (buf, sizeof (buf));
 335         root.add_property ("diskstream-id", buf);
 336
 337         root.add_child_nocopy (_rec_enable_control->get_state());
 338
 339         return root;
 340 }
 341
 342 void
 343 AudioTrack::set_state_part_two ()
 344 {
 345         XMLNode* fnode;
 346         XMLProperty* prop;
 347         LocaleGuard lg (X_("POSIX"));
 348
 349         /* This is called after all session state has been restored but before
 350            have been made ports and connections are established.
 351         */
 352
 353         if (pending_state == 0) {
 354                 return;
 355         }
 356
 357         if ((fnode = find_named_node (*pending_state, X_("freeze-info"))) != 0) {
 358
 359
 360                 _freeze_record.have_mementos = false;
 361                 _freeze_record.state = Frozen;
 362
 363                 for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 364                         delete *i;
 365                 }
 366                 _freeze_record.processor_info.clear ();
 367
 368                 if ((prop = fnode->property (X_("playlist"))) != 0) {
 369                         boost::shared_ptr<Playlist> pl = _session.playlist_by_name (prop->value());
 370                         if (pl) {
 371                                 _freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist> (pl);
 372                         } else {
 373                                 _freeze_record.playlist.reset ();
 374                                 _freeze_record.state = NoFreeze;
 375                         return;
 376                         }
 377                 }
 378
 379                 if ((prop = fnode->property (X_("state"))) != 0) {
 380                         _freeze_record.state = FreezeState (string_2_enum (prop->value(), _freeze_record.state));
 381                 }
 382
 383                 XMLNodeConstIterator citer;
 384                 XMLNodeList clist = fnode->children();
 385
 386                 for (citer = clist.begin(); citer != clist.end(); ++citer) {
 387                         if ((*citer)->name() != X_("processor")) {
 388                                 continue;
 389                         }
 390
 391                         if ((prop = (*citer)->property (X_("id"))) == 0) {
 392                                 continue;
 393                         }
 394
 395                         FreezeRecordProcessorInfo* frii = new FreezeRecordProcessorInfo (*((*citer)->children().front()),
 396                                                                                    boost::shared_ptr<Processor>());
 397                         frii->id = prop->value ();
 398                         _freeze_record.processor_info.push_back (frii);
 399                 }
 400         }
 401
 402         /* Alignment: act as a proxy for the diskstream */
 403
 404         if ((fnode = find_named_node (*pending_state, X_("alignment"))) != 0) {
 405
 406                 if ((prop = fnode->property (X_("style"))) != 0) {
 407
 408                         /* fix for older sessions from before EnumWriter */
 409
 410                         string pstr;
 411
 412                         if (prop->value() == "capture") {
 413                                 pstr = "CaptureTime";
 414                         } else if (prop->value() == "existing") {
 415                                 pstr = "ExistingMaterial";
 416                         } else {
 417                                 pstr = prop->value();
 418                         }
 419
 420                         AlignStyle as = AlignStyle (string_2_enum (pstr, as));
 421                         _diskstream->set_persistent_align_style (as);
 422                 }
 423         }
 424         return;
 425 }
 426
 427 int
 428 AudioTrack::no_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset,
 429                      bool session_state_changing, bool can_record, bool rec_monitors_input)
 430 {
 431         if (n_outputs().n_total() == 0) {
 432                 return 0;
 433         }
 434
 435         if (!_active) {
 436                 silence (nframes, offset);
 437                 return 0;
 438         }
 439
 440         if (session_state_changing) {
 441
 442                 /* XXX is this safe to do against transport state changes? */
 443
 444                 passthru_silence (start_frame, end_frame, nframes, offset, 0, false);
 445                 return 0;
 446         }
 447
 448         audio_diskstream()->check_record_status (start_frame, nframes, can_record);
 449
 450         bool send_silence;
 451
 452         if (_have_internal_generator) {
 453                 /* since the instrument has no input streams,
 454                    there is no reason to send any signal
 455                    into the route.
 456                 */
 457                 send_silence = true;
 458         } else {
 459
 460                 if (Config->get_auto_input()) {
 461                         if (Config->get_monitoring_model() == SoftwareMonitoring) {
 462                                 send_silence = false;
 463                         } else {
 464                                 send_silence = true;
 465                         }
 466                 } else {
 467                         if (_diskstream->record_enabled()) {
 468                                 if (Config->get_monitoring_model() == SoftwareMonitoring) {
 469                                         send_silence = false;
 470                                 } else {
 471                                         send_silence = true;
 472                                 }
 473                         } else {
 474                                 send_silence = true;
 475                         }
 476                 }
 477         }
 478
 479         apply_gain_automation = false;
 480
 481         if (send_silence) {
 482
 483                 /* if we're sending silence, but we want the meters to show levels for the signal,
 484                    meter right here.
 485                 */
 486
 487                 if (_have_internal_generator) {
 488                         passthru_silence (start_frame, end_frame, nframes, offset, 0, true);
 489                 } else {
 490                         if (_meter_point == MeterInput) {
 491                                 just_meter_input (start_frame, end_frame, nframes, offset);
 492                         }
 493                         passthru_silence (start_frame, end_frame, nframes, offset, 0, false);
 494                 }
 495
 496         } else {
 497
 498                 /* we're sending signal, but we may still want to meter the input.
 499                  */
 500
 501                 passthru (start_frame, end_frame, nframes, offset, 0, (_meter_point == MeterInput));
 502         }
 503
 504         return 0;
 505 }
 506
 507 int
 508 AudioTrack::roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset, int declick,
 509                   bool can_record, bool rec_monitors_input)
 510 {
 511         int dret;
 512         Sample* b;
 513         Sample* tmpb;
 514         nframes_t transport_frame;
 515         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 516
 517         {
 518                 Glib::RWLock::ReaderLock lm (_processor_lock, Glib::TRY_LOCK);
 519                 if (lm.locked()) {
 520                         // automation snapshot can also be called from the non-rt context
 521                         // and it uses the redirect list, so we take the lock out here
 522                         automation_snapshot (start_frame);
 523                 }
 524         }
 525
 526
 527         if (n_outputs().n_total() == 0 && _processors.empty()) {
 528                 return 0;
 529         }
 530
 531         if (!_active) {
 532                 silence (nframes, offset);
 533                 return 0;
 534         }
 535
 536         transport_frame = _session.transport_frame();
 537
 538         if ((nframes = check_initial_delay (nframes, offset, transport_frame)) == 0) {
 539                 /* need to do this so that the diskstream sets its
 540                    playback distance to zero, thus causing diskstream::commit
 541                    to do nothing.
 542                 */
 543                 return diskstream->process (transport_frame, 0, 0, can_record, rec_monitors_input);
 544         }
 545
 546         _silent = false;
 547         apply_gain_automation = false;
 548
 549         if ((dret = diskstream->process (transport_frame, nframes, offset, can_record, rec_monitors_input)) != 0) {
 550
 551                 silence (nframes, offset);
 552
 553                 return dret;
 554         }
 555
 556         /* special condition applies */
 557
 558         if (_meter_point == MeterInput) {
 559                 just_meter_input (start_frame, end_frame, nframes, offset);
 560         }
 561
 562         if (diskstream->record_enabled() && !can_record && !Config->get_auto_input()) {
 563
 564                 /* not actually recording, but we want to hear the input material anyway,
 565                    at least potentially (depending on monitoring options)
 566                  */
 567
 568                 passthru (start_frame, end_frame, nframes, offset, 0, true);
 569
 570         } else if ((b = diskstream->playback_buffer(0)) != 0) {
 571
 572                 /*
 573                   XXX is it true that the earlier test on n_outputs()
 574                   means that we can avoid checking it again here? i think
 575                   so, because changing the i/o configuration of an IO
 576                   requires holding the AudioEngine lock, which we hold
 577                   while in the process() tree.
 578                 */
 579
 580
 581                 /* copy the diskstream data to all output buffers */
 582
 583                 const size_t limit = n_process_buffers().n_audio();
 584                 BufferSet& bufs = _session.get_scratch_buffers (n_process_buffers());
 585
 586                 uint32_t n;
 587                 uint32_t i;
 588
 589                 for (i = 0, n = 1; i < limit; ++i, ++n) {
 590                         memcpy (bufs.get_audio(i).data(), b, sizeof (Sample) * nframes);
 591                         if (n < diskstream->n_channels().n_audio()) {
 592                                 tmpb = diskstream->playback_buffer(n);
 593                                 if (tmpb!=0) {
 594                                         b = tmpb;
 595                                 }
 596                         }
 597                 }
 598
 599                 /* don't waste time with automation if we're recording or we've just stopped (yes it can happen) */
 600
 601                 if (!diskstream->record_enabled() && _session.transport_rolling()) {
 602                         Glib::Mutex::Lock am (_automation_lock, Glib::TRY_LOCK);
 603
 604                         if (am.locked() && gain_control()->list()->automation_playback()) {
 605                                 apply_gain_automation = gain_control()->list()->curve().rt_safe_get_vector (start_frame, end_frame, _session.gain_automation_buffer(), nframes);
 606                         }
 607                 }
 608
 609                 process_output_buffers (bufs, start_frame, end_frame, nframes, offset, (!_session.get_record_enabled() || !Config->get_do_not_record_plugins()), declick, (_meter_point != MeterInput));
 610
 611         } else {
 612                 /* problem with the diskstream; just be quiet for a bit */
 613                 silence (nframes, offset);
 614         }
 615
 616         return 0;
 617 }
 618
 619 int
 620 AudioTrack::silent_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset,
 621                          bool can_record, bool rec_monitors_input)
 622 {
 623         if (n_outputs().n_total() == 0 && _processors.empty()) {
 624                 return 0;
 625         }
 626
 627         if (!_active) {
 628                 silence (nframes, offset);
 629                 return 0;
 630         }
 631
 632         _silent = true;
 633         apply_gain_automation = false;
 634
 635         silence (nframes, offset);
 636
 637         return audio_diskstream()->process (_session.transport_frame() + offset, nframes, offset, can_record, rec_monitors_input);
 638 }
 639
 640 int
 641 AudioTrack::export_stuff (BufferSet& buffers, nframes_t start, nframes_t nframes)
 642 {
 643         gain_t  gain_automation[nframes];
 644         gain_t  gain_buffer[nframes];
 645         float   mix_buffer[nframes];
 646         ProcessorList::iterator i;
 647         bool post_fader_work = false;
 648         gain_t this_gain = _gain;
 649         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 650
 651         Glib::RWLock::ReaderLock rlock (_processor_lock);
 652
 653         boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist());
 654         assert(apl);
 655
 656         if (apl->read (buffers.get_audio(nframes).data(),
 657                         mix_buffer, gain_buffer, start, nframes) != nframes) {
 658                 return -1;
 659         }
 660
 661         assert(buffers.count().n_audio() >= 1);
 662         uint32_t n=1;
 663         Sample* b = buffers.get_audio(0).data();
 664         BufferSet::audio_iterator bi = buffers.audio_begin();
 665         ++bi;
 666         for ( ; bi != buffers.audio_end(); ++bi, ++n) {
 667                 if (n < diskstream->n_channels().n_audio()) {
 668                         if (apl->read (bi->data(), mix_buffer, gain_buffer, start, nframes, n) != nframes) {
 669                                 return -1;
 670                         }
 671                         b = bi->data();
 672                 }
 673                 else {
 674                         /* duplicate last across remaining buffers */
 675                         memcpy (bi->data(), b, sizeof (Sample) * nframes);
 676                 }
 677         }
 678
 679
 680         /* note: only run processors during export. other layers in the machinery
 681            will already have checked that there are no external port processors.
 682         */
 683
 684         for (i = _processors.begin(); i != _processors.end(); ++i) {
 685                 boost::shared_ptr<Processor> processor;
 686
 687                 if ((processor = boost::dynamic_pointer_cast<Processor>(*i)) != 0) {
 688                         switch (processor->placement()) {
 689                         case PreFader:
 690                                 processor->run_in_place (buffers, start, start+nframes, nframes, 0);
 691                                 break;
 692                         case PostFader:
 693                                 post_fader_work = true;
 694                                 break;
 695                         }
 696                 }
 697         }
 698
 699         if (gain_control()->list()->automation_state() == Play) {
 700
 701                 gain_control()->list()->curve().get_vector (start, start + nframes, gain_automation, nframes);
 702
 703                 for (BufferSet::audio_iterator bi = buffers.audio_begin(); bi != buffers.audio_end(); ++bi) {
 704                         Sample *b = bi->data();
 705                         for (nframes_t n = 0; n < nframes; ++n) {
 706                                 b[n] *= gain_automation[n];
 707                         }
 708                 }
 709
 710         } else {
 711
 712                 for (BufferSet::audio_iterator bi = buffers.audio_begin(); bi != buffers.audio_end(); ++bi) {
 713                         Sample *b = bi->data();
 714                         for (nframes_t n = 0; n < nframes; ++n) {
 715                                 b[n] *= this_gain;
 716                         }
 717                 }
 718         }
 719
 720         if (post_fader_work) {
 721
 722                 for (i = _processors.begin(); i != _processors.end(); ++i) {
 723                         boost::shared_ptr<PluginInsert> processor;
 724
 725                         if ((processor = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
 726                                 switch ((*i)->placement()) {
 727                                 case PreFader:
 728                                         break;
 729                                 case PostFader:
 730                                         processor->run_in_place (buffers, start, start+nframes, nframes, 0);
 731                                         break;
 732                                 }
 733                         }
 734                 }
 735         }
 736
 737         return 0;
 738 }
 739
 740 void
 741 AudioTrack::bounce (InterThreadInfo& itt)
 742 {
 743         vector<boost::shared_ptr<Source> > srcs;
 744         _session.write_one_audio_track (*this, 0, _session.current_end_frame(), false, srcs, itt);
 745         itt.done = true;
 746 }
 747
 748
 749 void
 750 AudioTrack::bounce_range (nframes_t start, nframes_t end, InterThreadInfo& itt)
 751 {
 752         vector<boost::shared_ptr<Source> > srcs;
 753         _session.write_one_audio_track (*this, start, end, false, srcs, itt);
 754         itt.done = true;
 755 }
 756
 757 void
 758 AudioTrack::freeze (InterThreadInfo& itt)
 759 {
 760         vector<boost::shared_ptr<Source> > srcs;
 761         string new_playlist_name;
 762         boost::shared_ptr<Playlist> new_playlist;
 763         string dir;
 764         string region_name;
 765         boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 766
 767         if ((_freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist())) == 0) {
 768                 return;
 769         }
 770
 771         uint32_t n = 1;
 772
 773         while (n < (UINT_MAX-1)) {
 774
 775                 string candidate;
 776
 777                 candidate = string_compose ("<F%2>%1", _freeze_record.playlist->name(), n);
 778
 779                 if (_session.playlist_by_name (candidate) == 0) {
 780                         new_playlist_name = candidate;
 781                         break;
 782                 }
 783
 784                 ++n;
 785
 786         }
 787
 788         if (n == (UINT_MAX-1)) {
 789           error << string_compose (X_("There are too many frozen versions of playlist \"%1\""
 790                             " to create another one"), _freeze_record.playlist->name())
 791                << endmsg;
 792                 return;
 793         }
 794
 795         if (_session.write_one_audio_track (*this, _session.current_start_frame(), _session.current_end_frame(), true, srcs, itt)) {
 796                 return;
 797         }
 798
 799         _freeze_record.processor_info.clear ();
 800         _freeze_record.have_mementos = true;
 801
 802         {
 803                 Glib::RWLock::ReaderLock lm (_processor_lock);
 804
 805                 for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
 806
 807                         boost::shared_ptr<Processor> processor;
 808
 809                         if ((processor = boost::dynamic_pointer_cast<Processor>(*r)) != 0) {
 810
 811                                 FreezeRecordProcessorInfo* frii  = new FreezeRecordProcessorInfo ((*r)->get_state(), processor);
 812
 813                                 frii->id = processor->id();
 814
 815                                 _freeze_record.processor_info.push_back (frii);
 816
 817                                 /* now deactivate the processor */
 818
 819                                 processor->set_active (false);
 820                                 _session.set_dirty ();
 821                         }
 822                 }
 823         }
 824
 825         new_playlist = PlaylistFactory::create (DataType::AUDIO, _session, new_playlist_name, false);
 826         region_name = new_playlist_name;
 827
 828         /* create a new region from all filesources, keep it private */
 829
 830         boost::shared_ptr<Region> region (RegionFactory::create (srcs, 0, srcs[0]->length(),
 831                                                                  region_name, 0,
 832                                                                  (Region::Flag) (Region::WholeFile|Region::DefaultFlags),
 833                                                                  false));
 834
 835         new_playlist->set_orig_diskstream_id (diskstream->id());
 836         new_playlist->add_region (region, _session.current_start_frame());
 837         new_playlist->set_frozen (true);
 838         region->set_locked (true);
 839
 840         diskstream->use_playlist (boost::dynamic_pointer_cast<AudioPlaylist>(new_playlist));
 841         diskstream->set_record_enabled (false);
 842
 843         _freeze_record.state = Frozen;
 844         FreezeChange(); /* EMIT SIGNAL */
 845 }
 846
 847 void
 848 AudioTrack::unfreeze ()
 849 {
 850         if (_freeze_record.playlist) {
 851                 audio_diskstream()->use_playlist (_freeze_record.playlist);
 852
 853                 if (_freeze_record.have_mementos) {
 854
 855                         for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
 856                                 (*i)->memento ();
 857                         }
 858
 859                 } else {
 860
 861                         Glib::RWLock::ReaderLock lm (_processor_lock); // should this be a write lock? jlc
 862                         for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
 863                                 for (vector<FreezeRecordProcessorInfo*>::iterator ii = _freeze_record.processor_info.begin(); ii != _freeze_record.processor_info.end(); ++ii) {
 864                                         if ((*ii)->id == (*i)->id()) {
 865                                                 (*i)->set_state (((*ii)->state));
 866                                                 break;
 867                                         }
 868                                 }
 869                         }
 870                 }
 871
 872                 _freeze_record.playlist.reset ();
 873         }
 874
 875         _freeze_record.state = UnFrozen;
 876         FreezeChange (); /* EMIT SIGNAL */
 877 }
 878